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January 2025

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476 discussions

[GIT PULL] Please pull u-boot-imx-master-20250120
by Fabio Estevam 20 Jan '25

20 Jan '25

Hi Tom, Please pull from u-boot-imx/master, thanks. The following changes since commit 639cd409987acf173eaffebe7876968b42fd7c32: Merge patch series "add the support of sha256_hmac and sha256_hkdf" (2025-01-18 17:13:01 -0600) are available in the Git repository at: https://gitlab.denx.de/u-boot/custodians/u-boot-imx.git tags/u-boot-imx-master-20250120 for you to fetch changes up to e38a490810af76169f7cf1d298966ea9ba3c005b: phycore-imx8mp: Enable CAAM in spl (2025-01-20 08:41:38 -0300) u-boot-imx-master-20250120 -------------------------- CI: https://source.denx.de/u-boot/custodians/u-boot-imx/-/pipelines/24263 - Add i.MX95 EMDIO support - Guard binman nodes with CONFIG_OPTEE on imx8m - Enable CAAM in phycore-imx8mp SPL. - Fix Fix NULL dereference in imx_pinctrl_probe(). ---------------------------------------------------------------- Alice Guo (2): net: fsl_enetc: add i.MX95 EMDIO support net: fsl_enetc: Update enetc driver to support i.MX95 Fabio Estevam (1): imx8m: Guard binman nodes with CONFIG_OPTEE Jesse Taube (1): pinctrl: imx: Fix NULL dereference in imx_pinctrl_probe() Leonard Anderweit (1): phycore-imx8mp: Enable CAAM in spl Marek Vasut (11): net: fsl_enetc: Introduce enetc_is_ls1028a() net: fsl_enetc: Remove ifdef around enetc_set_ierb_primary_mac() net: fsl_enetc: Fold DT MAC address update into enetc_set_ierb_primary_mac() net: fsl_enetc: Pass udevice pointer into enetc_enable_si_port() net: fsl_enetc: Rename the driver and related structures net: fsl_enetc: Introduce enetc_dev_id() net: fsl_enetc: Inline register accessors net: fsl_enetc: Split register accessors net: fsl_enetc: Introduce driver data net: fsl_enetc: Pass udevice pointer to accessors net: fsl_enetc: Add initial netc-blk-ctrl driver support arch/arm/dts/imx8mm-u-boot.dtsi | 6 + arch/arm/dts/imx8mn-u-boot.dtsi | 6 + arch/arm/dts/imx8mp-u-boot.dtsi | 6 + arch/arm/dts/imx8mq-u-boot.dtsi | 6 + board/phytec/phycore_imx8mp/spl.c | 2 + configs/phycore-imx8mp_defconfig | 2 - drivers/net/Kconfig | 14 + drivers/net/Makefile | 1 + drivers/net/fsl_enetc.c | 487 +++++++++++++++++++++++++++++----- drivers/net/fsl_enetc.h | 88 +++--- drivers/net/fsl_enetc_mdio.c | 20 +- drivers/net/fsl_enetc_netc_blk_ctrl.c | 346 ++++++++++++++++++++++++ drivers/pinctrl/nxp/pinctrl-imx.c | 4 +- 13 files changed, 876 insertions(+), 112 deletions(-) create mode 100644 drivers/net/fsl_enetc_netc_blk_ctrl.c

2 1

[PATCH v2 1/1] cmd/setexpr: support concatenation of direct strings
by Heinrich Schuchardt 20 Jan '25

20 Jan '25

The setexpr.s command allows to concatenate two strings. According to the description in doc/usage/cmd/setexpr.rst the parameters value1 and value2 can be either direct values or pointers to a memory location holding the values. Unfortunately `setexpr.s <value1> + <value2>` fails if any of the values is a direct value. $? is set to false. * Add support for direct values in setexpr.s. * Correct the unit test for "setexpr.s fred 0". * Add a new unit test for "setexpr.s fred '1' + '3'" giving '13'. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt(a)canonical.com> --- v2: Update the commit message to indicate that a bug is corrected. --- cmd/setexpr.c | 54 ++++++++++++++++++++++++++++++++-------------- test/cmd/setexpr.c | 7 +++++- 2 files changed, 44 insertions(+), 17 deletions(-) diff --git a/cmd/setexpr.c b/cmd/setexpr.c index e111b8ba98a..c45fa85c887 100644 --- a/cmd/setexpr.c +++ b/cmd/setexpr.c @@ -35,9 +35,37 @@ struct expr_arg { }; }; +/** + * arg_set_str() - copy string to expression argument + * + * The string is truncated to 64 KiB plus NUL terminator. + * + * @p: pointer to string + * @argp: pointer to expression argument + * Return: 0 on success, -ENOMEM if out of memory + */ +static int arg_set_str(void *p, struct expr_arg *argp) +{ + int len; + char *str; + + /* Maximum string length of 64 KiB plus NUL terminator */ + len = strnlen((char *)p, SZ_64K) + 1; + str = malloc(len); + if (!str) { + printf("Out of memory\n"); + return -ENOMEM; + } + memcpy(str, p, len); + str[len - 1] = '\0'; + argp->sval = str; + return 0; +} + static int get_arg(char *s, int w, struct expr_arg *argp) { struct expr_arg arg; + int ret; /* * If the parameter starts with a '*' then assume it is a pointer to @@ -47,8 +75,6 @@ static int get_arg(char *s, int w, struct expr_arg *argp) ulong *p; ulong addr; ulong val; - int len; - char *str; addr = hextoul(&s[1], NULL); switch (w) { @@ -66,18 +92,10 @@ static int get_arg(char *s, int w, struct expr_arg *argp) break; case CMD_DATA_SIZE_STR: p = map_sysmem(addr, SZ_64K); - - /* Maximum string length of 64KB plus terminator */ - len = strnlen((char *)p, SZ_64K) + 1; - str = malloc(len); - if (!str) { - printf("Out of memory\n"); - return -ENOMEM; - } - memcpy(str, p, len); - str[len - 1] = '\0'; + ret = arg_set_str(p, &arg); unmap_sysmem(p); - arg.sval = str; + if (ret) + return ret; break; case 4: p = map_sysmem(addr, sizeof(u32)); @@ -93,9 +111,13 @@ static int get_arg(char *s, int w, struct expr_arg *argp) break; } } else { - if (w == CMD_DATA_SIZE_STR) - return -EINVAL; - arg.ival = hextoul(s, NULL); + if (w == CMD_DATA_SIZE_STR) { + ret = arg_set_str(s, &arg); + if (ret) + return ret; + } else { + arg.ival = hextoul(s, NULL); + } } *argp = arg; diff --git a/test/cmd/setexpr.c b/test/cmd/setexpr.c index 21a3268bd81..00d373f35ae 100644 --- a/test/cmd/setexpr.c +++ b/test/cmd/setexpr.c @@ -310,7 +310,8 @@ static int setexpr_test_str(struct unit_test_state *uts) ut_assertok(env_set("fred", "x")); start_mem = ut_check_free(); strcpy(buf, "hello"); - ut_asserteq(1, run_command("setexpr.s fred 0", 0)); + ut_asserteq(0, run_command("setexpr.s fred 0", 0)); + ut_asserteq_str("0", env_get("fred")); ut_assertok(ut_check_delta(start_mem)); ut_assertok(env_set("fred", "12345")); @@ -335,6 +336,10 @@ static int setexpr_test_str_oper(struct unit_test_state *uts) ulong start_mem; char *buf; + /* Test concatenation of strings */ + ut_assertok(run_command("setexpr.s fred '1' + '3'", 0)); + ut_asserteq_str("13", env_get("fred")); + buf = map_sysmem(0, BUF_SIZE); memset(buf, '\xff', BUF_SIZE); strcpy(buf, "hello"); -- 2.47.1

2 1

[PATCH v2] sunxi: defconfig: Add pstore support for pinephone
by Andrey Skvortsov 20 Jan '25

20 Jan '25

pstore will allow users to catch kernel crashes and report them to developers. Modern (Android) phones have pstore usually enabled to get information about kernel crash, since it's the simplest way to get kernel backtrace on mobile device without serial console. Usually it's enabled by default in distribution kernels like Debian. CONFIG_PSTORE=y CONFIG_PSTORE_RAM=m systemd has service that automatically handles pstore and saves them in /var/lib/pstore for later usage. In general any DRAM address, that isn't overwritten during a boot is suitable for pstore. Range from 0x40000000 - 0x50000000 is heavily used by u-boot for internal use and to load kernel, fdt, fdto, scripts, pxefile and ramdisk later in the boot process. Ramdisk start address is 0x4FF00000, initramfs for kernel with some hacking features and debug info enabled can take more than 100Mb and final address will be around 0x58000000. Address 0x61000000 will most likely not overlap with that. Signed-off-by: Andrey Skvortsov <andrej.skvortzov(a)gmail.com> --- Changes since v1: - updated description with pstore usage details configs/pinephone_defconfig | 2 ++ 1 file changed, 2 insertions(+) diff --git a/configs/pinephone_defconfig b/configs/pinephone_defconfig index 9d39204a439..7b80cc3131b 100644 --- a/configs/pinephone_defconfig +++ b/configs/pinephone_defconfig @@ -10,6 +10,8 @@ CONFIG_DRAM_ZQ=3881949 CONFIG_MMC_SUNXI_SLOT_EXTRA=2 CONFIG_PINEPHONE_DT_SELECTION=y # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set +CONFIG_CMD_PSTORE=y +CONFIG_CMD_PSTORE_MEM_ADDR=0x61000000 CONFIG_OF_LIST="sun50i-a64-pinephone-1.1 sun50i-a64-pinephone-1.2" CONFIG_LED_STATUS=y CONFIG_LED_STATUS_GPIO=y -- 2.45.2

2 1

OP-TEE test suite
by Simon Glass 20 Jan '25

20 Jan '25

Hi Heiko, Jen, I noticed recently that the unit tests for OP-TEE are not build for sandbox (or in fact any board). The code seems to have gone out of date and doesn't build. Do you think you could take a look? Regards, Simon

1 1

[PATCH v1] arm: Remove redundant loading of image copy start offse
by 1425075683＠qq.com 20 Jan '25

20 Jan '25

From: Liya Huang <1425075683(a)qq.com> Remove redundant loading of image copy start offset. Because the beginning is already computed Reviewed-by: Pali Rohár <pali(a)kernel.org> Reviewed-by: Simon Glass <sjg(a)chromium.org> Signed-off-by: Liya Huang <1425075683(a)qq.com> --- Changes in v1: - Due to an error, the patch was resubmitted, leaving the code unchanged arch/arm/lib/relocate.S | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/arm/lib/relocate.S b/arch/arm/lib/relocate.S index 345e282e3e..bffadfecba 100644 --- a/arch/arm/lib/relocate.S +++ b/arch/arm/lib/relocate.S @@ -83,8 +83,6 @@ relocate_base: add r1, r3 /* r1 <- Run &__image_copy_start */ subs r4, r0, r1 /* r4 <- Run to copy offset */ beq relocate_done /* skip relocation */ - ldr r1, _image_copy_start_ofs - add r1, r3 /* r1 <- Run &__image_copy_start */ ldr r2, _image_copy_end_ofs add r2, r3 /* r2 <- Run &__image_copy_end */ copy_loop: -- 2.25.1

3 2

[PATCH] arch: arm: mach-k3: Delete tifs node in DT fixup
by Udit Kumar 20 Jan '25

20 Jan '25

Delete tifs DT node as part of fixup. TISCI API reported msmc_size, does not include 64KB reserved size for tifs aka MSMC comms memory, see documentation[0]. As part of fixup, original code uses TISCI API reported msmc_size as size for SRAM DT node. tifs node is similar to l3-cache, which should hold address above msmc_size, and should be deleted before passing control to OS. [0] https://software-dl.ti.com/tisci/esd/latest/2_tisci_msgs/general/core.html?… Reviewed-by: Neha Malcom Francis <n-francis(a)ti.com> Signed-off-by: Udit Kumar <u-kumar1(a)ti.com> --- RFC was sent to k.org with https://lore.kernel.org/all/20230506100826.1525641-1-u-kumar1@ti.com/ So planning to go ahead with option 1. Changelog: Changes in v3: - Collected R/B of v2 - Updated commit message typo Changes since v2: - moved tifs check above l3 as v2: https://lore.kernel.org/all/20230420081128.3617214-1-u-kumar1@ti.com/ v1: https://lore.kernel.org/all/20230419061352.3156023-1-u-kumar1@ti.com/ arch/arm/mach-k3/common_fdt.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/mach-k3/common_fdt.c b/arch/arm/mach-k3/common_fdt.c index 3bdedd7b50..4a01671156 100644 --- a/arch/arm/mach-k3/common_fdt.c +++ b/arch/arm/mach-k3/common_fdt.c @@ -65,6 +65,7 @@ static int fdt_fixup_msmc_ram(void *blob, char *parent_path, char *node_name) subnode, addr, size); if (addr + size > msmc_size || !strncmp(fdt_get_name(blob, subnode, &len), "sysfw", 5) || + !strncmp(fdt_get_name(blob, subnode, &len), "tifs", 4) || !strncmp(fdt_get_name(blob, subnode, &len), "l3cache", 7)) { fdt_del_node(blob, subnode); debug("%s: deleting subnode %d\n", __func__, subnode); -- 2.34.1

2 1

[PATCH] board: ti: j722s: j722s.env: Set remoteproc firmware names
by Beleswar Padhi 20 Jan '25

20 Jan '25

Include k3_rproc.env to access rproc boot commands and specify rproc firmware names for adding remoteproc support in J722S SoCs. Signed-off-by: Beleswar Padhi <b-padhi(a)ti.com> --- This patch is independent and puts the environment in place to boot remote processors at U-Boot stage. However, for successfully loading the firmwares into remote cores, rproc DT node definitions are required. These DT changes have been merged into Linux and available with v6.12 tag[0]. Once the DT Sync happens in U-Boot, remote processors can be probed and booted with the help of env commands enabled with this patch. Sample Boot Test logs after manually adding DT nodes in U-Boot: https://gist.github.com/3V3RYONE/0b5c7df5b5c88d2a2f273b6a04a3dd46 [0]: https://lore.kernel.org/all/20240830161742.925145-1-b-padhi@ti.com/ Thanks, Beleswar board/ti/j722s/j722s.env | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/board/ti/j722s/j722s.env b/board/ti/j722s/j722s.env index f8b6aff2c2f..10d62034e1a 100644 --- a/board/ti/j722s/j722s.env +++ b/board/ti/j722s/j722s.env @@ -1,6 +1,10 @@ #include <env/ti/ti_common.env> #include <env/ti/mmc.env> +#if CONFIG_CMD_REMOTEPROC +#include <env/ti/k3_rproc.env> +#endif + name_kern=Image console=ttyS2,115200n8 args_all=setenv optargs ${optargs} earlycon=ns16550a,mmio32,0x02800000 @@ -13,3 +17,5 @@ mmcdev=1 bootpart=1:2 bootdir=/boot rd_spec=- + +rproc_fw_binaries= 0 /lib/firmware/j722s-mcu-r5f0_0-fw 2 /lib/firmware/j722s-main-r5f0_0-fw 3 /lib/firmware/j722s-c71_0-fw 4 /lib/firmware/j722s-c71_1-fw -- 2.34.1

4 4

[PATCH] arch: arm: mach-k3: j784s4_init: Set CTRL_MMR for AUDIO_REFCLK1 clk_sel
by Jayesh Choudhary 20 Jan '25

20 Jan '25

The default value for the mux to select the parent clock, AUDIO_REFCLK1_CTRL_CLK_SEL is '11111' (31) but the mux input for 31 is marked as 'Reserved' so the ti-sci-clk call for get-parent fails. Mark it to a valid value, '11100' (28) for MAIN_PLL4_HSDIV2_CLKOUT to get rid of the linux failures during boot-time like: "[ 1.573193] ti-sci-clk 44083000.system-controller:clock-controller: get-parent failed for dev=157, clk=34, ret=-19" Signed-off-by: Jayesh Choudhary <j-choudhary(a)ti.com> --- arch/arm/mach-k3/j784s4/j784s4_init.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm/mach-k3/j784s4/j784s4_init.c b/arch/arm/mach-k3/j784s4/j784s4_init.c index 8a41cd3bb5..787cf6261e 100644 --- a/arch/arm/mach-k3/j784s4/j784s4_init.c +++ b/arch/arm/mach-k3/j784s4/j784s4_init.c @@ -23,6 +23,9 @@ #define J784S4_MAX_DDR_CONTROLLERS 4 +#define CTRL_MMR_CFG0_AUDIO_REFCLK1_CTRL 0x001082e4 +#define AUDIO_REFCLK1_DEFAULT 0x1c + /* NAVSS North Bridge (NB) */ #define NAVSS0_NBSS_NB0_CFG_MMRS 0x03702000 #define NAVSS0_NBSS_NB1_CFG_MMRS 0x03703000 @@ -201,6 +204,8 @@ void k3_spl_init(void) remove_fwl_configs(navss_cbass0_fwls, ARRAY_SIZE(navss_cbass0_fwls)); } + writel(AUDIO_REFCLK1_DEFAULT, (uintptr_t)CTRL_MMR_CFG0_AUDIO_REFCLK1_CTRL); + /* Output System Firmware version info */ k3_sysfw_print_ver(); } -- 2.34.1

3 3

[PATCH 1/1] fs: eliminate YAFFS2 implementation
by Heinrich Schuchardt 20 Jan '25

20 Jan '25

Upstream development stopped 2012. Linux eliminated YAFFS2 in 2010. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt(a)canonical.com> --- cmd/Kconfig | 11 - cmd/Makefile | 1 - cmd/yaffs2.c | 324 --- fs/Kconfig | 2 - fs/Makefile | 1 - fs/yaffs2/Kconfig | 19 - fs/yaffs2/Makefile | 18 - fs/yaffs2/yaffs_allocator.c | 357 --- fs/yaffs2/yaffs_allocator.h | 30 - fs/yaffs2/yaffs_attribs.c | 150 - fs/yaffs2/yaffs_attribs.h | 28 - fs/yaffs2/yaffs_bitmap.c | 97 - fs/yaffs2/yaffs_bitmap.h | 33 - fs/yaffs2/yaffs_checkptrw.c | 409 --- fs/yaffs2/yaffs_checkptrw.h | 33 - fs/yaffs2/yaffs_ecc.c | 280 -- fs/yaffs2/yaffs_ecc.h | 44 - fs/yaffs2/yaffs_error.c | 58 - fs/yaffs2/yaffs_flashif.h | 34 - fs/yaffs2/yaffs_flashif2.h | 34 - fs/yaffs2/yaffs_getblockinfo.h | 35 - fs/yaffs2/yaffs_guts.c | 4995 -------------------------------- fs/yaffs2/yaffs_guts.h | 969 ------- fs/yaffs2/yaffs_mtdif.c | 159 - fs/yaffs2/yaffs_mtdif.h | 27 - fs/yaffs2/yaffs_mtdif2.c | 230 -- fs/yaffs2/yaffs_mtdif2.h | 30 - fs/yaffs2/yaffs_nameval.c | 208 -- fs/yaffs2/yaffs_nameval.h | 28 - fs/yaffs2/yaffs_nand.c | 120 - fs/yaffs2/yaffs_nand.h | 38 - fs/yaffs2/yaffs_nandemul2k.h | 39 - fs/yaffs2/yaffs_nandif.c | 246 -- fs/yaffs2/yaffs_nandif.h | 63 - fs/yaffs2/yaffs_osglue.h | 38 - fs/yaffs2/yaffs_packedtags1.c | 56 - fs/yaffs2/yaffs_packedtags1.h | 39 - fs/yaffs2/yaffs_packedtags2.c | 197 -- fs/yaffs2/yaffs_packedtags2.h | 47 - fs/yaffs2/yaffs_qsort.c | 141 - fs/yaffs2/yaffs_summary.c | 306 -- fs/yaffs2/yaffs_summary.h | 35 - fs/yaffs2/yaffs_tagscompat.c | 406 --- fs/yaffs2/yaffs_tagscompat.h | 36 - fs/yaffs2/yaffs_trace.h | 57 - fs/yaffs2/yaffs_uboot_glue.c | 457 --- fs/yaffs2/yaffs_verify.c | 521 ---- fs/yaffs2/yaffs_verify.h | 43 - fs/yaffs2/yaffs_yaffs1.c | 420 --- fs/yaffs2/yaffs_yaffs1.h | 22 - fs/yaffs2/yaffs_yaffs2.c | 1526 ---------- fs/yaffs2/yaffs_yaffs2.h | 39 - fs/yaffs2/yaffscfg.h | 34 - fs/yaffs2/yaffsfs.c | 3208 -------------------- fs/yaffs2/yaffsfs.h | 199 -- fs/yaffs2/ydirectenv.h | 77 - fs/yaffs2/yportenv.h | 301 -- 57 files changed, 17355 deletions(-) delete mode 100644 cmd/yaffs2.c delete mode 100644 fs/yaffs2/Kconfig delete mode 100644 fs/yaffs2/Makefile delete mode 100644 fs/yaffs2/yaffs_allocator.c delete mode 100644 fs/yaffs2/yaffs_allocator.h delete mode 100644 fs/yaffs2/yaffs_attribs.c delete mode 100644 fs/yaffs2/yaffs_attribs.h delete mode 100644 fs/yaffs2/yaffs_bitmap.c delete mode 100644 fs/yaffs2/yaffs_bitmap.h delete mode 100644 fs/yaffs2/yaffs_checkptrw.c delete mode 100644 fs/yaffs2/yaffs_checkptrw.h delete mode 100644 fs/yaffs2/yaffs_ecc.c delete mode 100644 fs/yaffs2/yaffs_ecc.h delete mode 100644 fs/yaffs2/yaffs_error.c delete mode 100644 fs/yaffs2/yaffs_flashif.h delete mode 100644 fs/yaffs2/yaffs_flashif2.h delete mode 100644 fs/yaffs2/yaffs_getblockinfo.h delete mode 100644 fs/yaffs2/yaffs_guts.c delete mode 100644 fs/yaffs2/yaffs_guts.h delete mode 100644 fs/yaffs2/yaffs_mtdif.c delete mode 100644 fs/yaffs2/yaffs_mtdif.h delete mode 100644 fs/yaffs2/yaffs_mtdif2.c delete mode 100644 fs/yaffs2/yaffs_mtdif2.h delete mode 100644 fs/yaffs2/yaffs_nameval.c delete mode 100644 fs/yaffs2/yaffs_nameval.h delete mode 100644 fs/yaffs2/yaffs_nand.c delete mode 100644 fs/yaffs2/yaffs_nand.h delete mode 100644 fs/yaffs2/yaffs_nandemul2k.h delete mode 100644 fs/yaffs2/yaffs_nandif.c delete mode 100644 fs/yaffs2/yaffs_nandif.h delete mode 100644 fs/yaffs2/yaffs_osglue.h delete mode 100644 fs/yaffs2/yaffs_packedtags1.c delete mode 100644 fs/yaffs2/yaffs_packedtags1.h delete mode 100644 fs/yaffs2/yaffs_packedtags2.c delete mode 100644 fs/yaffs2/yaffs_packedtags2.h delete mode 100644 fs/yaffs2/yaffs_qsort.c delete mode 100644 fs/yaffs2/yaffs_summary.c delete mode 100644 fs/yaffs2/yaffs_summary.h delete mode 100644 fs/yaffs2/yaffs_tagscompat.c delete mode 100644 fs/yaffs2/yaffs_tagscompat.h delete mode 100644 fs/yaffs2/yaffs_trace.h delete mode 100644 fs/yaffs2/yaffs_uboot_glue.c delete mode 100644 fs/yaffs2/yaffs_verify.c delete mode 100644 fs/yaffs2/yaffs_verify.h delete mode 100644 fs/yaffs2/yaffs_yaffs1.c delete mode 100644 fs/yaffs2/yaffs_yaffs1.h delete mode 100644 fs/yaffs2/yaffs_yaffs2.c delete mode 100644 fs/yaffs2/yaffs_yaffs2.h delete mode 100644 fs/yaffs2/yaffscfg.h delete mode 100644 fs/yaffs2/yaffsfs.c delete mode 100644 fs/yaffs2/yaffsfs.h delete mode 100644 fs/yaffs2/ydirectenv.h delete mode 100644 fs/yaffs2/yportenv.h diff --git a/cmd/Kconfig b/cmd/Kconfig index 93efeaec6f4..aacdfcf86a0 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -2866,17 +2866,6 @@ config MTDPARTS_DEFAULT Defines a default MTD partitioning scheme in the Linux MTD command line partitions format -config CMD_YAFFS2 - bool "yaffs2 - Access of YAFFS2 filesystem" - depends on YAFFS2 - default y - help - This provides commands for accessing a YAFFS2 filesystem. Yet - Another Flash Filesystem 2 is a filesystem designed specifically - for NAND flash. It incorporates bad-block management and ensures - that device writes are sequential regardless of filesystem - activity. - config CMD_ZFS bool "zfs - Access of ZFS filesystem" help diff --git a/cmd/Makefile b/cmd/Makefile index 1e6d3128c8c..ef8efd2c748 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -212,7 +212,6 @@ obj-$(CONFIG_CMD_THOR_DOWNLOAD) += thordown.o obj-$(CONFIG_CMD_VBE) += vbe.o obj-$(CONFIG_CMD_XIMG) += ximg.o obj-$(CONFIG_CMD_XXD) += xxd.o -obj-$(CONFIG_CMD_YAFFS2) += yaffs2.o obj-$(CONFIG_CMD_SPL) += spl.o obj-$(CONFIG_CMD_W1) += w1.o obj-$(CONFIG_CMD_ZIP) += zip.o diff --git a/cmd/yaffs2.c b/cmd/yaffs2.c deleted file mode 100644 index daa44abeb72..00000000000 --- a/cmd/yaffs2.c +++ /dev/null @@ -1,324 +0,0 @@ -/* Yaffs commands. - * Modified by Charles Manning by adding ydevconfig command. - * - * Use ydevconfig to configure a mountpoint before use. - * For example: - * # Configure mountpt xxx using nand device 0 using blocks 100-500 - * ydevconfig xxx 0 100 500 - * # Mount it - * ymount xxx - * # yls, yrdm etc - * yls -l xxx - * yrdm xxx/boot-image 82000000 - * ... - */ - -#include <config.h> -#include <command.h> - -#ifdef YAFFS2_DEBUG -#define PRINTF(fmt, args...) printf(fmt, ##args) -#else -#define PRINTF(fmt, args...) do { } while (0) -#endif - -extern void cmd_yaffs_dev_ls(void); -extern void cmd_yaffs_tracemask(unsigned set, unsigned mask); -extern void cmd_yaffs_devconfig(char *mp, int flash_dev, - int start_block, int end_block); -extern void cmd_yaffs_mount(char *mp); -extern void cmd_yaffs_umount(char *mp); -extern void cmd_yaffs_read_file(char *fn); -extern void cmd_yaffs_write_file(char *fn, char bval, int sizeOfFile); -extern void cmd_yaffs_ls(const char *mountpt, int longlist); -extern void cmd_yaffs_mwrite_file(char *fn, char *addr, int size); -extern void cmd_yaffs_mread_file(char *fn, char *addr); -extern void cmd_yaffs_mkdir(const char *dir); -extern void cmd_yaffs_rmdir(const char *dir); -extern void cmd_yaffs_rm(const char *path); -extern void cmd_yaffs_mv(const char *oldPath, const char *newPath); - -extern int yaffs_dump_dev(const char *path); - -/* ytrace - show/set yaffs trace mask */ -int do_ytrace(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) -{ - if (argc > 1) - cmd_yaffs_tracemask(1, simple_strtol(argv[1], NULL, 16)); - else - cmd_yaffs_tracemask(0, 0); - - return 0; -} - -/* ydevls - lists yaffs mount points. */ -int do_ydevls(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) -{ - cmd_yaffs_dev_ls(); - - return 0; -} - -/* ydevconfig mount_pt mtd_dev_num start_block end_block */ -int do_ydevconfig(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) -{ - char *mtpoint; - int mtd_dev; - int start_block; - int end_block; - - if (argc != 5) { - printf - ("Bad arguments: ydevconfig mount_pt mtd_dev start_block end_block\n"); - return -1; - } - - mtpoint = argv[1]; - mtd_dev = simple_strtol(argv[2], NULL, 16); - start_block = simple_strtol(argv[3], NULL, 16); - end_block = simple_strtol(argv[4], NULL, 16); - - cmd_yaffs_devconfig(mtpoint, mtd_dev, start_block, end_block); - - return 0; -} - -int do_ymount(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) -{ - char *mtpoint; - - if (argc != 2) { - printf("Bad arguments: ymount mount_pt\n"); - return -1; - } - - mtpoint = argv[1]; - printf("Mounting yaffs2 mount point %s\n", mtpoint); - - cmd_yaffs_mount(mtpoint); - - return 0; -} - -int do_yumount(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) -{ - char *mtpoint; - - if (argc != 2) { - printf("Bad arguments: yumount mount_pt\n"); - return -1; - } - - mtpoint = argv[1]; - printf("Unmounting yaffs2 mount point %s\n", mtpoint); - cmd_yaffs_umount(mtpoint); - - return 0; -} - -int do_yls(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) -{ - char *dirname; - - if (argc < 2 || argc > 3 || (argc == 3 && strcmp(argv[1], "-l"))) { - printf("Bad arguments: yls [-l] dir\n"); - return -1; - } - - dirname = argv[argc - 1]; - - cmd_yaffs_ls(dirname, (argc > 2) ? 1 : 0); - - return 0; -} - -int do_yrd(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) -{ - char *filename; - - if (argc != 2) { - printf("Bad arguments: yrd file_name\n"); - return -1; - } - - filename = argv[1]; - - printf("Reading file %s ", filename); - - cmd_yaffs_read_file(filename); - - printf("done\n"); - return 0; -} - -int do_ywr(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) -{ - char *filename; - ulong value; - ulong numValues; - - if (argc != 4) { - printf("Bad arguments: ywr file_name value n_values\n"); - return -1; - } - - filename = argv[1]; - value = hextoul(argv[2], NULL); - numValues = hextoul(argv[3], NULL); - - printf("Writing value (%lx) %lx times to %s... ", value, numValues, - filename); - - cmd_yaffs_write_file(filename, value, numValues); - - printf("done\n"); - return 0; -} - -int do_yrdm(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) -{ - char *filename; - ulong addr; - - if (argc != 3) { - printf("Bad arguments: yrdm file_name addr\n"); - return -1; - } - - filename = argv[1]; - addr = hextoul(argv[2], NULL); - - cmd_yaffs_mread_file(filename, (char *)addr); - - return 0; -} - -int do_ywrm(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) -{ - char *filename; - ulong addr; - ulong size; - - if (argc != 4) { - printf("Bad arguments: ywrm file_name addr size\n"); - return -1; - } - - filename = argv[1]; - addr = hextoul(argv[2], NULL); - size = hextoul(argv[3], NULL); - - cmd_yaffs_mwrite_file(filename, (char *)addr, size); - - return 0; -} - -int do_ymkdir(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) -{ - char *dirname; - - if (argc != 2) { - printf("Bad arguments: ymkdir dir_name\n"); - return -1; - } - - dirname = argv[1]; - cmd_yaffs_mkdir(dirname); - - return 0; -} - -int do_yrmdir(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) -{ - char *dirname; - - if (argc != 2) { - printf("Bad arguments: yrmdir dir_name\n"); - return -1; - } - - dirname = argv[1]; - cmd_yaffs_rmdir(dirname); - - return 0; -} - -int do_yrm(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) -{ - char *name; - - if (argc != 2) { - printf("Bad arguments: yrm name\n"); - return -1; - } - - name = argv[1]; - - cmd_yaffs_rm(name); - - return 0; -} - -int do_ymv(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) -{ - char *oldPath; - char *newPath; - - if (argc != 3) { - printf("Bad arguments: ymv old_path new_path\n"); - return -1; - } - - oldPath = argv[1]; - newPath = argv[2]; - - cmd_yaffs_mv(newPath, oldPath); - - return 0; -} - -U_BOOT_CMD(ytrace, 2, 0, do_ytrace, - "show/set yaffs trace mask", - "[new_mask] show/set yaffs trace mask"); - -U_BOOT_CMD(ydevls, 1, 0, do_ydevls, - "list yaffs mount points", "list yaffs mount points"); - -U_BOOT_CMD(ydevconfig, 5, 0, do_ydevconfig, - "configure yaffs mount point", - "mtpoint mtd_id start_block end_block configures a yaffs2 mount point"); - -U_BOOT_CMD(ymount, 2, 0, do_ymount, - "mount yaffs", "mtpoint mounts a yaffs2 mount point"); - -U_BOOT_CMD(yumount, 2, 0, do_yumount, - "unmount yaffs", "mtpoint unmounts a yaffs2 mount point"); - -U_BOOT_CMD(yls, 3, 0, do_yls, "yaffs ls", "[-l] dirname"); - -U_BOOT_CMD(yrd, 2, 0, do_yrd, - "read file from yaffs", "path read file from yaffs"); - -U_BOOT_CMD(ywr, 4, 0, do_ywr, - "write file to yaffs", - "filename value num_vlues write values to yaffs file"); - -U_BOOT_CMD(yrdm, 3, 0, do_yrdm, - "read file to memory from yaffs", - "filename offset reads yaffs file into memory"); - -U_BOOT_CMD(ywrm, 4, 0, do_ywrm, - "write file from memory to yaffs", - "filename offset size writes memory to yaffs file"); - -U_BOOT_CMD(ymkdir, 2, 0, do_ymkdir, - "YAFFS mkdir", "dir create a yaffs directory"); - -U_BOOT_CMD(yrmdir, 2, 0, do_yrmdir, - "YAFFS rmdir", "dirname removes a yaffs directory"); - -U_BOOT_CMD(yrm, 2, 0, do_yrm, "YAFFS rm", "path removes a yaffs file"); - -U_BOOT_CMD(ymv, 4, 0, do_ymv, - "YAFFS mv", - "old_path new_path moves/rename files within a yaffs mount point"); diff --git a/fs/Kconfig b/fs/Kconfig index 744c9812b12..5e83cb27059 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -20,8 +20,6 @@ source "fs/ubifs/Kconfig" source "fs/cramfs/Kconfig" -source "fs/yaffs2/Kconfig" - source "fs/squashfs/Kconfig" source "fs/erofs/Kconfig" diff --git a/fs/Makefile b/fs/Makefile index 1e54ac11ab7..1c2ff180bda 100644 --- a/fs/Makefile +++ b/fs/Makefile @@ -22,7 +22,6 @@ obj-$(CONFIG_FS_JFFS2) += jffs2/ obj-$(CONFIG_SANDBOX) += sandbox/ obj-$(CONFIG_SEMIHOSTING) += semihostingfs.o obj-$(CONFIG_CMD_UBIFS) += ubifs/ -obj-$(CONFIG_YAFFS2) += yaffs2/ obj-$(CONFIG_CMD_ZFS) += zfs/ obj-$(CONFIG_FS_SQUASHFS) += squashfs/ obj-$(CONFIG_FS_EROFS) += erofs/ diff --git a/fs/yaffs2/Kconfig b/fs/yaffs2/Kconfig deleted file mode 100644 index c81f4555d60..00000000000 --- a/fs/yaffs2/Kconfig +++ /dev/null @@ -1,19 +0,0 @@ -config YAFFS_DIRECT - bool - -config YAFFS_PROVIDE_DEFS - bool - -config YAFFSFS_PROVIDE_VALUES - bool - -config YAFFS2 - bool "YAFFS2 filesystem support" - select YAFFS_DIRECT - select YAFFS_PROVIDE_DEFS - select YAFFSFS_PROVIDE_VALUES - help - This provides access to YAFFS2 filesystems. Yet Another Flash - Filesystem 2 is a filesystem designed specifically for NAND flash. - It incorporates bad-block management and ensures that device - writes are sequential regardless of filesystem activity. diff --git a/fs/yaffs2/Makefile b/fs/yaffs2/Makefile deleted file mode 100644 index 02cae265550..00000000000 --- a/fs/yaffs2/Makefile +++ /dev/null @@ -1,18 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# Makefile for YAFFS direct test -# YAFFS: Yet another Flash File System. A NAND-flash specific file system. -# -# Copyright (C) 2003 Aleph One Ltd. -# -# -# Created by Charles Manning <charles(a)aleph1.co.uk> -# -# - -obj-y := \ - yaffs_allocator.o yaffs_attribs.o yaffs_bitmap.o yaffs_uboot_glue.o\ - yaffs_checkptrw.o yaffs_ecc.o yaffs_error.o \ - yaffsfs.o yaffs_guts.o yaffs_nameval.o yaffs_nand.o\ - yaffs_packedtags1.o yaffs_packedtags2.o yaffs_qsort.o \ - yaffs_summary.o yaffs_tagscompat.o yaffs_verify.o yaffs_yaffs1.o \ - yaffs_yaffs2.o yaffs_mtdif.o yaffs_mtdif2.o diff --git a/fs/yaffs2/yaffs_allocator.c b/fs/yaffs2/yaffs_allocator.c deleted file mode 100644 index 961dc22ef3d..00000000000 --- a/fs/yaffs2/yaffs_allocator.c +++ /dev/null @@ -1,357 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_allocator.h" -#include "yaffs_guts.h" -#include "yaffs_trace.h" -#include "yportenv.h" -#include <dm/devres.h> - -/* - * Each entry in yaffs_tnode_list and yaffs_obj_list hold blocks - * of approx 100 objects that are themn allocated singly. - * This is basically a simplified slab allocator. - * - * We don't use the Linux slab allocator because slab does not allow - * us to dump all the objects in one hit when we do a umount and tear - * down all the tnodes and objects. slab requires that we first free - * the individual objects. - * - * Once yaffs has been mainlined I shall try to motivate for a change - * to slab to provide the extra features we need here. - */ - -struct yaffs_tnode_list { - struct yaffs_tnode_list *next; - struct yaffs_tnode *tnodes; -}; - -struct yaffs_obj_list { - struct yaffs_obj_list *next; - struct yaffs_obj *objects; -}; - -struct yaffs_allocator { - int n_tnodes_created; - struct yaffs_tnode *free_tnodes; - int n_free_tnodes; - struct yaffs_tnode_list *alloc_tnode_list; - - int n_obj_created; - struct list_head free_objs; - int n_free_objects; - - struct yaffs_obj_list *allocated_obj_list; -}; - -static void yaffs_deinit_raw_tnodes(struct yaffs_dev *dev) -{ - struct yaffs_allocator *allocator = - (struct yaffs_allocator *)dev->allocator; - struct yaffs_tnode_list *tmp; - - if (!allocator) { - BUG(); - return; - } - - while (allocator->alloc_tnode_list) { - tmp = allocator->alloc_tnode_list->next; - - kfree(allocator->alloc_tnode_list->tnodes); - kfree(allocator->alloc_tnode_list); - allocator->alloc_tnode_list = tmp; - } - - allocator->free_tnodes = NULL; - allocator->n_free_tnodes = 0; - allocator->n_tnodes_created = 0; -} - -static void yaffs_init_raw_tnodes(struct yaffs_dev *dev) -{ - struct yaffs_allocator *allocator = dev->allocator; - - if (!allocator) { - BUG(); - return; - } - - allocator->alloc_tnode_list = NULL; - allocator->free_tnodes = NULL; - allocator->n_free_tnodes = 0; - allocator->n_tnodes_created = 0; -} - -static int yaffs_create_tnodes(struct yaffs_dev *dev, int n_tnodes) -{ - struct yaffs_allocator *allocator = - (struct yaffs_allocator *)dev->allocator; - int i; - struct yaffs_tnode *new_tnodes; - u8 *mem; - struct yaffs_tnode *curr; - struct yaffs_tnode *next; - struct yaffs_tnode_list *tnl; - - if (!allocator) { - BUG(); - return YAFFS_FAIL; - } - - if (n_tnodes < 1) - return YAFFS_OK; - - /* make these things */ - new_tnodes = kmalloc(n_tnodes * dev->tnode_size, GFP_NOFS); - mem = (u8 *) new_tnodes; - - if (!new_tnodes) { - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs: Could not allocate Tnodes"); - return YAFFS_FAIL; - } - - /* New hookup for wide tnodes */ - for (i = 0; i < n_tnodes - 1; i++) { - curr = (struct yaffs_tnode *)&mem[i * dev->tnode_size]; - next = (struct yaffs_tnode *)&mem[(i + 1) * dev->tnode_size]; - curr->internal[0] = next; - } - - curr = (struct yaffs_tnode *)&mem[(n_tnodes - 1) * dev->tnode_size]; - curr->internal[0] = allocator->free_tnodes; - allocator->free_tnodes = (struct yaffs_tnode *)mem; - - allocator->n_free_tnodes += n_tnodes; - allocator->n_tnodes_created += n_tnodes; - - /* Now add this bunch of tnodes to a list for freeing up. - * NB If we can't add this to the management list it isn't fatal - * but it just means we can't free this bunch of tnodes later. - */ - tnl = kmalloc(sizeof(struct yaffs_tnode_list), GFP_NOFS); - if (!tnl) { - yaffs_trace(YAFFS_TRACE_ERROR, - "Could not add tnodes to management list"); - return YAFFS_FAIL; - } else { - tnl->tnodes = new_tnodes; - tnl->next = allocator->alloc_tnode_list; - allocator->alloc_tnode_list = tnl; - } - - yaffs_trace(YAFFS_TRACE_ALLOCATE, "Tnodes added"); - - return YAFFS_OK; -} - -struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev) -{ - struct yaffs_allocator *allocator = - (struct yaffs_allocator *)dev->allocator; - struct yaffs_tnode *tn = NULL; - - if (!allocator) { - BUG(); - return NULL; - } - - /* If there are none left make more */ - if (!allocator->free_tnodes) - yaffs_create_tnodes(dev, YAFFS_ALLOCATION_NTNODES); - - if (allocator->free_tnodes) { - tn = allocator->free_tnodes; - allocator->free_tnodes = allocator->free_tnodes->internal[0]; - allocator->n_free_tnodes--; - } - - return tn; -} - -/* FreeTnode frees up a tnode and puts it back on the free list */ -void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn) -{ - struct yaffs_allocator *allocator = dev->allocator; - - if (!allocator) { - BUG(); - return; - } - - if (tn) { - tn->internal[0] = allocator->free_tnodes; - allocator->free_tnodes = tn; - allocator->n_free_tnodes++; - } - dev->checkpoint_blocks_required = 0; /* force recalculation */ -} - -/*--------------- yaffs_obj alloaction ------------------------ - * - * Free yaffs_objs are stored in a list using obj->siblings. - * The blocks of allocated objects are stored in a linked list. - */ - -static void yaffs_init_raw_objs(struct yaffs_dev *dev) -{ - struct yaffs_allocator *allocator = dev->allocator; - - if (!allocator) { - BUG(); - return; - } - - allocator->allocated_obj_list = NULL; - INIT_LIST_HEAD(&allocator->free_objs); - allocator->n_free_objects = 0; -} - -static void yaffs_deinit_raw_objs(struct yaffs_dev *dev) -{ - struct yaffs_allocator *allocator = dev->allocator; - struct yaffs_obj_list *tmp; - - if (!allocator) { - BUG(); - return; - } - - while (allocator->allocated_obj_list) { - tmp = allocator->allocated_obj_list->next; - kfree(allocator->allocated_obj_list->objects); - kfree(allocator->allocated_obj_list); - allocator->allocated_obj_list = tmp; - } - - INIT_LIST_HEAD(&allocator->free_objs); - allocator->n_free_objects = 0; - allocator->n_obj_created = 0; -} - -static int yaffs_create_free_objs(struct yaffs_dev *dev, int n_obj) -{ - struct yaffs_allocator *allocator = dev->allocator; - int i; - struct yaffs_obj *new_objs; - struct yaffs_obj_list *list; - - if (!allocator) { - BUG(); - return YAFFS_FAIL; - } - - if (n_obj < 1) - return YAFFS_OK; - - /* make these things */ - new_objs = kmalloc(n_obj * sizeof(struct yaffs_obj), GFP_NOFS); - list = kmalloc(sizeof(struct yaffs_obj_list), GFP_NOFS); - - if (!new_objs || !list) { - kfree(new_objs); - new_objs = NULL; - kfree(list); - list = NULL; - yaffs_trace(YAFFS_TRACE_ALLOCATE, - "Could not allocate more objects"); - return YAFFS_FAIL; - } - - /* Hook them into the free list */ - for (i = 0; i < n_obj; i++) - list_add(&new_objs[i].siblings, &allocator->free_objs); - - allocator->n_free_objects += n_obj; - allocator->n_obj_created += n_obj; - - /* Now add this bunch of Objects to a list for freeing up. */ - - list->objects = new_objs; - list->next = allocator->allocated_obj_list; - allocator->allocated_obj_list = list; - - return YAFFS_OK; -} - -struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev) -{ - struct yaffs_obj *obj = NULL; - struct list_head *lh; - struct yaffs_allocator *allocator = dev->allocator; - - if (!allocator) { - BUG(); - return obj; - } - - /* If there are none left make more */ - if (list_empty(&allocator->free_objs)) - yaffs_create_free_objs(dev, YAFFS_ALLOCATION_NOBJECTS); - - if (!list_empty(&allocator->free_objs)) { - lh = allocator->free_objs.next; - obj = list_entry(lh, struct yaffs_obj, siblings); - list_del_init(lh); - allocator->n_free_objects--; - } - - return obj; -} - -void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj) -{ - - struct yaffs_allocator *allocator = dev->allocator; - - if (!allocator) { - BUG(); - return; - } - - /* Link into the free list. */ - list_add(&obj->siblings, &allocator->free_objs); - allocator->n_free_objects++; -} - -void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev) -{ - - if (!dev->allocator) { - BUG(); - return; - } - - yaffs_deinit_raw_tnodes(dev); - yaffs_deinit_raw_objs(dev); - kfree(dev->allocator); - dev->allocator = NULL; -} - -void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev) -{ - struct yaffs_allocator *allocator; - - if (dev->allocator) { - BUG(); - return; - } - - allocator = kmalloc(sizeof(struct yaffs_allocator), GFP_NOFS); - if (allocator) { - dev->allocator = allocator; - yaffs_init_raw_tnodes(dev); - yaffs_init_raw_objs(dev); - } -} diff --git a/fs/yaffs2/yaffs_allocator.h b/fs/yaffs2/yaffs_allocator.h deleted file mode 100644 index a8cc3226421..00000000000 --- a/fs/yaffs2/yaffs_allocator.h +++ /dev/null @@ -1,30 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_ALLOCATOR_H__ -#define __YAFFS_ALLOCATOR_H__ - -#include "yaffs_guts.h" - -void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev); -void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev); - -struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev); -void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn); - -struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev); -void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj); - -#endif diff --git a/fs/yaffs2/yaffs_attribs.c b/fs/yaffs2/yaffs_attribs.c deleted file mode 100644 index 81927cb9437..00000000000 --- a/fs/yaffs2/yaffs_attribs.c +++ /dev/null @@ -1,150 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_attribs.h" - -void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh) -{ - obj->yst_uid = oh->yst_uid; - obj->yst_gid = oh->yst_gid; - obj->yst_atime = oh->yst_atime; - obj->yst_mtime = oh->yst_mtime; - obj->yst_ctime = oh->yst_ctime; - obj->yst_rdev = oh->yst_rdev; -} - -void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj) -{ -#ifdef CONFIG_YAFFS_WINCE - oh->win_atime[0] = obj->win_atime[0]; - oh->win_ctime[0] = obj->win_ctime[0]; - oh->win_mtime[0] = obj->win_mtime[0]; - oh->win_atime[1] = obj->win_atime[1]; - oh->win_ctime[1] = obj->win_ctime[1]; - oh->win_mtime[1] = obj->win_mtime[1]; -#else - oh->yst_uid = obj->yst_uid; - oh->yst_gid = obj->yst_gid; - oh->yst_atime = obj->yst_atime; - oh->yst_mtime = obj->yst_mtime; - oh->yst_ctime = obj->yst_ctime; - oh->yst_rdev = obj->yst_rdev; -#endif - -} - -void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev) -{ - -#ifdef CONFIG_YAFFS_WINCE - yfsd_win_file_time_now(obj->win_atime); - obj->win_ctime[0] = obj->win_mtime[0] = obj->win_atime[0]; - obj->win_ctime[1] = obj->win_mtime[1] = obj->win_atime[1]; - -#else - yaffs_load_current_time(obj, 1, 1); - obj->yst_rdev = rdev; - obj->yst_uid = uid; - obj->yst_gid = gid; -#endif -} - -void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c) -{ -#ifdef CONFIG_YAFFS_WINCE - yfsd_win_file_time_now(the_obj->win_atime); - the_obj->win_ctime[0] = the_obj->win_mtime[0] = - the_obj->win_atime[0]; - the_obj->win_ctime[1] = the_obj->win_mtime[1] = - the_obj->win_atime[1]; - -#else - - obj->yst_mtime = Y_CURRENT_TIME; - if (do_a) - obj->yst_atime = obj->yst_atime; - if (do_c) - obj->yst_ctime = obj->yst_atime; -#endif -} - -loff_t yaffs_get_file_size(struct yaffs_obj *obj) -{ - YCHAR *alias = NULL; - obj = yaffs_get_equivalent_obj(obj); - - switch (obj->variant_type) { - case YAFFS_OBJECT_TYPE_FILE: - return obj->variant.file_variant.file_size; - case YAFFS_OBJECT_TYPE_SYMLINK: - alias = obj->variant.symlink_variant.alias; - if (!alias) - return 0; - return yaffs_strnlen(alias, YAFFS_MAX_ALIAS_LENGTH); - default: - return 0; - } -} - -int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr) -{ - unsigned int valid = attr->ia_valid; - - if (valid & ATTR_MODE) - obj->yst_mode = attr->ia_mode; - if (valid & ATTR_UID) - obj->yst_uid = attr->ia_uid; - if (valid & ATTR_GID) - obj->yst_gid = attr->ia_gid; - - if (valid & ATTR_ATIME) - obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime); - if (valid & ATTR_CTIME) - obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime); - if (valid & ATTR_MTIME) - obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime); - - if (valid & ATTR_SIZE) - yaffs_resize_file(obj, attr->ia_size); - - yaffs_update_oh(obj, NULL, 1, 0, 0, NULL); - - return YAFFS_OK; - -} - -int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr) -{ - unsigned int valid = 0; - - attr->ia_mode = obj->yst_mode; - valid |= ATTR_MODE; - attr->ia_uid = obj->yst_uid; - valid |= ATTR_UID; - attr->ia_gid = obj->yst_gid; - valid |= ATTR_GID; - - Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime; - valid |= ATTR_ATIME; - Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime; - valid |= ATTR_CTIME; - Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime; - valid |= ATTR_MTIME; - - attr->ia_size = yaffs_get_file_size(obj); - valid |= ATTR_SIZE; - - attr->ia_valid = valid; - - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_attribs.h b/fs/yaffs2/yaffs_attribs.h deleted file mode 100644 index 5b21b085b73..00000000000 --- a/fs/yaffs2/yaffs_attribs.h +++ /dev/null @@ -1,28 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_ATTRIBS_H__ -#define __YAFFS_ATTRIBS_H__ - -#include "yaffs_guts.h" - -void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh); -void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj); -void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev); -void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c); -int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr); -int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr); - -#endif diff --git a/fs/yaffs2/yaffs_bitmap.c b/fs/yaffs2/yaffs_bitmap.c deleted file mode 100644 index 4440e930d6b..00000000000 --- a/fs/yaffs2/yaffs_bitmap.c +++ /dev/null @@ -1,97 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_bitmap.h" -#include "yaffs_trace.h" -/* - * Chunk bitmap manipulations - */ - -static inline u8 *yaffs_block_bits(struct yaffs_dev *dev, int blk) -{ - if (blk < dev->internal_start_block || blk > dev->internal_end_block) { - yaffs_trace(YAFFS_TRACE_ERROR, - "BlockBits block %d is not valid", - blk); - BUG(); - } - return dev->chunk_bits + - (dev->chunk_bit_stride * (blk - dev->internal_start_block)); -} - -void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk) -{ - if (blk < dev->internal_start_block || blk > dev->internal_end_block || - chunk < 0 || chunk >= dev->param.chunks_per_block) { - yaffs_trace(YAFFS_TRACE_ERROR, - "Chunk Id (%d:%d) invalid", - blk, chunk); - BUG(); - } -} - -void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk) -{ - u8 *blk_bits = yaffs_block_bits(dev, blk); - - memset(blk_bits, 0, dev->chunk_bit_stride); -} - -void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk) -{ - u8 *blk_bits = yaffs_block_bits(dev, blk); - - yaffs_verify_chunk_bit_id(dev, blk, chunk); - blk_bits[chunk / 8] &= ~(1 << (chunk & 7)); -} - -void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk) -{ - u8 *blk_bits = yaffs_block_bits(dev, blk); - - yaffs_verify_chunk_bit_id(dev, blk, chunk); - blk_bits[chunk / 8] |= (1 << (chunk & 7)); -} - -int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk) -{ - u8 *blk_bits = yaffs_block_bits(dev, blk); - - yaffs_verify_chunk_bit_id(dev, blk, chunk); - return (blk_bits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0; -} - -int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk) -{ - u8 *blk_bits = yaffs_block_bits(dev, blk); - int i; - - for (i = 0; i < dev->chunk_bit_stride; i++) { - if (*blk_bits) - return 1; - blk_bits++; - } - return 0; -} - -int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk) -{ - u8 *blk_bits = yaffs_block_bits(dev, blk); - int i; - int n = 0; - - for (i = 0; i < dev->chunk_bit_stride; i++, blk_bits++) - n += hweight8(*blk_bits); - - return n; -} diff --git a/fs/yaffs2/yaffs_bitmap.h b/fs/yaffs2/yaffs_bitmap.h deleted file mode 100644 index e26b37d89ae..00000000000 --- a/fs/yaffs2/yaffs_bitmap.h +++ /dev/null @@ -1,33 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* - * Chunk bitmap manipulations - */ - -#ifndef __YAFFS_BITMAP_H__ -#define __YAFFS_BITMAP_H__ - -#include "yaffs_guts.h" - -void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk); -void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk); -void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk); -void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk); -int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk); -int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk); -int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk); - -#endif diff --git a/fs/yaffs2/yaffs_checkptrw.c b/fs/yaffs2/yaffs_checkptrw.c deleted file mode 100644 index 628f02bb48d..00000000000 --- a/fs/yaffs2/yaffs_checkptrw.c +++ /dev/null @@ -1,409 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_checkptrw.h" -#include "yaffs_getblockinfo.h" -#include <dm/devres.h> - -static int yaffs2_checkpt_space_ok(struct yaffs_dev *dev) -{ - int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks; - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "checkpt blocks_avail = %d", blocks_avail); - - return (blocks_avail <= 0) ? 0 : 1; -} - -static int yaffs_checkpt_erase(struct yaffs_dev *dev) -{ - int i; - - if (!dev->param.erase_fn) - return 0; - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "checking blocks %d to %d", - dev->internal_start_block, dev->internal_end_block); - - for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { - struct yaffs_block_info *bi = yaffs_get_block_info(dev, i); - if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "erasing checkpt block %d", i); - - dev->n_erasures++; - - if (dev->param. - erase_fn(dev, - i - dev->block_offset /* realign */)) { - bi->block_state = YAFFS_BLOCK_STATE_EMPTY; - dev->n_erased_blocks++; - dev->n_free_chunks += - dev->param.chunks_per_block; - } else { - dev->param.bad_block_fn(dev, i); - bi->block_state = YAFFS_BLOCK_STATE_DEAD; - } - } - } - - dev->blocks_in_checkpt = 0; - - return 1; -} - -static void yaffs2_checkpt_find_erased_block(struct yaffs_dev *dev) -{ - int i; - int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks; - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "allocating checkpt block: erased %d reserved %d avail %d next %d ", - dev->n_erased_blocks, dev->param.n_reserved_blocks, - blocks_avail, dev->checkpt_next_block); - - if (dev->checkpt_next_block >= 0 && - dev->checkpt_next_block <= dev->internal_end_block && - blocks_avail > 0) { - - for (i = dev->checkpt_next_block; i <= dev->internal_end_block; - i++) { - struct yaffs_block_info *bi = - yaffs_get_block_info(dev, i); - if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) { - dev->checkpt_next_block = i + 1; - dev->checkpt_cur_block = i; - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "allocating checkpt block %d", i); - return; - } - } - } - yaffs_trace(YAFFS_TRACE_CHECKPOINT, "out of checkpt blocks"); - - dev->checkpt_next_block = -1; - dev->checkpt_cur_block = -1; -} - -static void yaffs2_checkpt_find_block(struct yaffs_dev *dev) -{ - int i; - struct yaffs_ext_tags tags; - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "find next checkpt block: start: blocks %d next %d", - dev->blocks_in_checkpt, dev->checkpt_next_block); - - if (dev->blocks_in_checkpt < dev->checkpt_max_blocks) - for (i = dev->checkpt_next_block; i <= dev->internal_end_block; - i++) { - int chunk = i * dev->param.chunks_per_block; - int realigned_chunk = chunk - dev->chunk_offset; - - dev->param.read_chunk_tags_fn(dev, realigned_chunk, - NULL, &tags); - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "find next checkpt block: search: block %d oid %d seq %d eccr %d", - i, tags.obj_id, tags.seq_number, - tags.ecc_result); - - if (tags.seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA) { - /* Right kind of block */ - dev->checkpt_next_block = tags.obj_id; - dev->checkpt_cur_block = i; - dev->checkpt_block_list[dev-> - blocks_in_checkpt] = i; - dev->blocks_in_checkpt++; - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "found checkpt block %d", i); - return; - } - } - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, "found no more checkpt blocks"); - - dev->checkpt_next_block = -1; - dev->checkpt_cur_block = -1; -} - -int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing) -{ - int i; - - dev->checkpt_open_write = writing; - - /* Got the functions we need? */ - if (!dev->param.write_chunk_tags_fn || - !dev->param.read_chunk_tags_fn || - !dev->param.erase_fn || !dev->param.bad_block_fn) - return 0; - - if (writing && !yaffs2_checkpt_space_ok(dev)) - return 0; - - if (!dev->checkpt_buffer) - dev->checkpt_buffer = - kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); - if (!dev->checkpt_buffer) - return 0; - - dev->checkpt_page_seq = 0; - dev->checkpt_byte_count = 0; - dev->checkpt_sum = 0; - dev->checkpt_xor = 0; - dev->checkpt_cur_block = -1; - dev->checkpt_cur_chunk = -1; - dev->checkpt_next_block = dev->internal_start_block; - - /* Erase all the blocks in the checkpoint area */ - if (writing) { - memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk); - dev->checkpt_byte_offs = 0; - return yaffs_checkpt_erase(dev); - } - - /* Set to a value that will kick off a read */ - dev->checkpt_byte_offs = dev->data_bytes_per_chunk; - /* A checkpoint block list of 1 checkpoint block per 16 block is - * (hopefully) going to be way more than we need */ - dev->blocks_in_checkpt = 0; - dev->checkpt_max_blocks = - (dev->internal_end_block - dev->internal_start_block) / 16 + 2; - dev->checkpt_block_list = - kmalloc(sizeof(int) * dev->checkpt_max_blocks, GFP_NOFS); - - if (!dev->checkpt_block_list) - return 0; - - for (i = 0; i < dev->checkpt_max_blocks; i++) - dev->checkpt_block_list[i] = -1; - - return 1; -} - -int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum) -{ - u32 composite_sum; - - composite_sum = (dev->checkpt_sum << 8) | (dev->checkpt_xor & 0xff); - *sum = composite_sum; - return 1; -} - -static int yaffs2_checkpt_flush_buffer(struct yaffs_dev *dev) -{ - int chunk; - int realigned_chunk; - struct yaffs_ext_tags tags; - - if (dev->checkpt_cur_block < 0) { - yaffs2_checkpt_find_erased_block(dev); - dev->checkpt_cur_chunk = 0; - } - - if (dev->checkpt_cur_block < 0) - return 0; - - tags.is_deleted = 0; - tags.obj_id = dev->checkpt_next_block; /* Hint to next place to look */ - tags.chunk_id = dev->checkpt_page_seq + 1; - tags.seq_number = YAFFS_SEQUENCE_CHECKPOINT_DATA; - tags.n_bytes = dev->data_bytes_per_chunk; - if (dev->checkpt_cur_chunk == 0) { - /* First chunk we write for the block? Set block state to - checkpoint */ - struct yaffs_block_info *bi = - yaffs_get_block_info(dev, dev->checkpt_cur_block); - bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT; - dev->blocks_in_checkpt++; - } - - chunk = - dev->checkpt_cur_block * dev->param.chunks_per_block + - dev->checkpt_cur_chunk; - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "checkpoint wite buffer nand %d(%d:%d) objid %d chId %d", - chunk, dev->checkpt_cur_block, dev->checkpt_cur_chunk, - tags.obj_id, tags.chunk_id); - - realigned_chunk = chunk - dev->chunk_offset; - - dev->n_page_writes++; - - dev->param.write_chunk_tags_fn(dev, realigned_chunk, - dev->checkpt_buffer, &tags); - dev->checkpt_byte_offs = 0; - dev->checkpt_page_seq++; - dev->checkpt_cur_chunk++; - if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block) { - dev->checkpt_cur_chunk = 0; - dev->checkpt_cur_block = -1; - } - memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk); - - return 1; -} - -int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes) -{ - int i = 0; - int ok = 1; - u8 *data_bytes = (u8 *) data; - - if (!dev->checkpt_buffer) - return 0; - - if (!dev->checkpt_open_write) - return -1; - - while (i < n_bytes && ok) { - dev->checkpt_buffer[dev->checkpt_byte_offs] = *data_bytes; - dev->checkpt_sum += *data_bytes; - dev->checkpt_xor ^= *data_bytes; - - dev->checkpt_byte_offs++; - i++; - data_bytes++; - dev->checkpt_byte_count++; - - if (dev->checkpt_byte_offs < 0 || - dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) - ok = yaffs2_checkpt_flush_buffer(dev); - } - - return i; -} - -int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes) -{ - int i = 0; - int ok = 1; - struct yaffs_ext_tags tags; - int chunk; - int realigned_chunk; - u8 *data_bytes = (u8 *) data; - - if (!dev->checkpt_buffer) - return 0; - - if (dev->checkpt_open_write) - return -1; - - while (i < n_bytes && ok) { - - if (dev->checkpt_byte_offs < 0 || - dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) { - - if (dev->checkpt_cur_block < 0) { - yaffs2_checkpt_find_block(dev); - dev->checkpt_cur_chunk = 0; - } - - if (dev->checkpt_cur_block < 0) { - ok = 0; - break; - } - - chunk = dev->checkpt_cur_block * - dev->param.chunks_per_block + - dev->checkpt_cur_chunk; - - realigned_chunk = chunk - dev->chunk_offset; - dev->n_page_reads++; - - /* read in the next chunk */ - dev->param.read_chunk_tags_fn(dev, - realigned_chunk, - dev->checkpt_buffer, - &tags); - - if (tags.chunk_id != (dev->checkpt_page_seq + 1) || - tags.ecc_result > YAFFS_ECC_RESULT_FIXED || - tags.seq_number != YAFFS_SEQUENCE_CHECKPOINT_DATA) { - ok = 0; - break; - } - - dev->checkpt_byte_offs = 0; - dev->checkpt_page_seq++; - dev->checkpt_cur_chunk++; - - if (dev->checkpt_cur_chunk >= - dev->param.chunks_per_block) - dev->checkpt_cur_block = -1; - } - - *data_bytes = dev->checkpt_buffer[dev->checkpt_byte_offs]; - dev->checkpt_sum += *data_bytes; - dev->checkpt_xor ^= *data_bytes; - dev->checkpt_byte_offs++; - i++; - data_bytes++; - dev->checkpt_byte_count++; - } - - return i; -} - -int yaffs_checkpt_close(struct yaffs_dev *dev) -{ - int i; - - if (dev->checkpt_open_write) { - if (dev->checkpt_byte_offs != 0) - yaffs2_checkpt_flush_buffer(dev); - } else if (dev->checkpt_block_list) { - for (i = 0; - i < dev->blocks_in_checkpt && - dev->checkpt_block_list[i] >= 0; i++) { - int blk = dev->checkpt_block_list[i]; - struct yaffs_block_info *bi = NULL; - - if (dev->internal_start_block <= blk && - blk <= dev->internal_end_block) - bi = yaffs_get_block_info(dev, blk); - if (bi && bi->block_state == YAFFS_BLOCK_STATE_EMPTY) - bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT; - } - kfree(dev->checkpt_block_list); - dev->checkpt_block_list = NULL; - } - - dev->n_free_chunks -= - dev->blocks_in_checkpt * dev->param.chunks_per_block; - dev->n_erased_blocks -= dev->blocks_in_checkpt; - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, "checkpoint byte count %d", - dev->checkpt_byte_count); - - if (dev->checkpt_buffer) { - /* free the buffer */ - kfree(dev->checkpt_buffer); - dev->checkpt_buffer = NULL; - return 1; - } else { - return 0; - } -} - -int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev) -{ - /* Erase the checkpoint data */ - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "checkpoint invalidate of %d blocks", - dev->blocks_in_checkpt); - - return yaffs_checkpt_erase(dev); -} diff --git a/fs/yaffs2/yaffs_checkptrw.h b/fs/yaffs2/yaffs_checkptrw.h deleted file mode 100644 index cdbaba7153e..00000000000 --- a/fs/yaffs2/yaffs_checkptrw.h +++ /dev/null @@ -1,33 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_CHECKPTRW_H__ -#define __YAFFS_CHECKPTRW_H__ - -#include "yaffs_guts.h" - -int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing); - -int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes); - -int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes); - -int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum); - -int yaffs_checkpt_close(struct yaffs_dev *dev); - -int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev); - -#endif diff --git a/fs/yaffs2/yaffs_ecc.c b/fs/yaffs2/yaffs_ecc.c deleted file mode 100644 index 0860a3c7843..00000000000 --- a/fs/yaffs2/yaffs_ecc.c +++ /dev/null @@ -1,280 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* - * This code implements the ECC algorithm used in SmartMedia. - * - * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes. - * The two unused bit are set to 1. - * The ECC can correct single bit errors in a 256-byte page of data. Thus, two - * such ECC blocks are used on a 512-byte NAND page. - * - */ - -#include "yportenv.h" - -#include "yaffs_ecc.h" - -/* Table generated by gen-ecc.c - * Using a table means we do not have to calculate p1..p4 and p1'..p4' - * for each byte of data. These are instead provided in a table in bits7..2. - * Bit 0 of each entry indicates whether the entry has an odd or even parity, - * and therefore this bytes influence on the line parity. - */ - -static const unsigned char column_parity_table[] = { - 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69, - 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00, - 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc, - 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95, - 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0, - 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99, - 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65, - 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c, - 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc, - 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5, - 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59, - 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30, - 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55, - 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c, - 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0, - 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9, - 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0, - 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9, - 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55, - 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c, - 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59, - 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30, - 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc, - 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5, - 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65, - 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c, - 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0, - 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99, - 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc, - 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95, - 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69, - 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00, -}; - -/* Calculate the ECC for a 256-byte block of data */ -void yaffs_ecc_calc(const unsigned char *data, unsigned char *ecc) -{ - unsigned int i; - unsigned char col_parity = 0; - unsigned char line_parity = 0; - unsigned char line_parity_prime = 0; - unsigned char t; - unsigned char b; - - for (i = 0; i < 256; i++) { - b = column_parity_table[*data++]; - col_parity ^= b; - - if (b & 0x01) { /* odd number of bits in the byte */ - line_parity ^= i; - line_parity_prime ^= ~i; - } - } - - ecc[2] = (~col_parity) | 0x03; - - t = 0; - if (line_parity & 0x80) - t |= 0x80; - if (line_parity_prime & 0x80) - t |= 0x40; - if (line_parity & 0x40) - t |= 0x20; - if (line_parity_prime & 0x40) - t |= 0x10; - if (line_parity & 0x20) - t |= 0x08; - if (line_parity_prime & 0x20) - t |= 0x04; - if (line_parity & 0x10) - t |= 0x02; - if (line_parity_prime & 0x10) - t |= 0x01; - ecc[1] = ~t; - - t = 0; - if (line_parity & 0x08) - t |= 0x80; - if (line_parity_prime & 0x08) - t |= 0x40; - if (line_parity & 0x04) - t |= 0x20; - if (line_parity_prime & 0x04) - t |= 0x10; - if (line_parity & 0x02) - t |= 0x08; - if (line_parity_prime & 0x02) - t |= 0x04; - if (line_parity & 0x01) - t |= 0x02; - if (line_parity_prime & 0x01) - t |= 0x01; - ecc[0] = ~t; - -} - -/* Correct the ECC on a 256 byte block of data */ - -int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc, - const unsigned char *test_ecc) -{ - unsigned char d0, d1, d2; /* deltas */ - - d0 = read_ecc[0] ^ test_ecc[0]; - d1 = read_ecc[1] ^ test_ecc[1]; - d2 = read_ecc[2] ^ test_ecc[2]; - - if ((d0 | d1 | d2) == 0) - return 0; /* no error */ - - if (((d0 ^ (d0 >> 1)) & 0x55) == 0x55 && - ((d1 ^ (d1 >> 1)) & 0x55) == 0x55 && - ((d2 ^ (d2 >> 1)) & 0x54) == 0x54) { - /* Single bit (recoverable) error in data */ - - unsigned byte; - unsigned bit; - - bit = byte = 0; - - if (d1 & 0x80) - byte |= 0x80; - if (d1 & 0x20) - byte |= 0x40; - if (d1 & 0x08) - byte |= 0x20; - if (d1 & 0x02) - byte |= 0x10; - if (d0 & 0x80) - byte |= 0x08; - if (d0 & 0x20) - byte |= 0x04; - if (d0 & 0x08) - byte |= 0x02; - if (d0 & 0x02) - byte |= 0x01; - - if (d2 & 0x80) - bit |= 0x04; - if (d2 & 0x20) - bit |= 0x02; - if (d2 & 0x08) - bit |= 0x01; - - data[byte] ^= (1 << bit); - - return 1; /* Corrected the error */ - } - - if ((hweight8(d0) + hweight8(d1) + hweight8(d2)) == 1) { - /* Reccoverable error in ecc */ - - read_ecc[0] = test_ecc[0]; - read_ecc[1] = test_ecc[1]; - read_ecc[2] = test_ecc[2]; - - return 1; /* Corrected the error */ - } - - /* Unrecoverable error */ - - return -1; - -} - -/* - * ECCxxxOther does ECC calcs on arbitrary n bytes of data - */ -void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes, - struct yaffs_ecc_other *ecc_other) -{ - unsigned int i; - unsigned char col_parity = 0; - unsigned line_parity = 0; - unsigned line_parity_prime = 0; - unsigned char b; - - for (i = 0; i < n_bytes; i++) { - b = column_parity_table[*data++]; - col_parity ^= b; - - if (b & 0x01) { - /* odd number of bits in the byte */ - line_parity ^= i; - line_parity_prime ^= ~i; - } - - } - - ecc_other->col_parity = (col_parity >> 2) & 0x3f; - ecc_other->line_parity = line_parity; - ecc_other->line_parity_prime = line_parity_prime; -} - -int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes, - struct yaffs_ecc_other *read_ecc, - const struct yaffs_ecc_other *test_ecc) -{ - unsigned char delta_col; /* column parity delta */ - unsigned delta_line; /* line parity delta */ - unsigned delta_line_prime; /* line parity delta */ - unsigned bit; - - delta_col = read_ecc->col_parity ^ test_ecc->col_parity; - delta_line = read_ecc->line_parity ^ test_ecc->line_parity; - delta_line_prime = - read_ecc->line_parity_prime ^ test_ecc->line_parity_prime; - - if ((delta_col | delta_line | delta_line_prime) == 0) - return 0; /* no error */ - - if (delta_line == ~delta_line_prime && - (((delta_col ^ (delta_col >> 1)) & 0x15) == 0x15)) { - /* Single bit (recoverable) error in data */ - - bit = 0; - - if (delta_col & 0x20) - bit |= 0x04; - if (delta_col & 0x08) - bit |= 0x02; - if (delta_col & 0x02) - bit |= 0x01; - - if (delta_line >= n_bytes) - return -1; - - data[delta_line] ^= (1 << bit); - - return 1; /* corrected */ - } - - if ((hweight32(delta_line) + - hweight32(delta_line_prime) + - hweight8(delta_col)) == 1) { - /* Reccoverable error in ecc */ - - *read_ecc = *test_ecc; - return 1; /* corrected */ - } - - /* Unrecoverable error */ - - return -1; -} diff --git a/fs/yaffs2/yaffs_ecc.h b/fs/yaffs2/yaffs_ecc.h deleted file mode 100644 index 17d47bd80f3..00000000000 --- a/fs/yaffs2/yaffs_ecc.h +++ /dev/null @@ -1,44 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* - * This code implements the ECC algorithm used in SmartMedia. - * - * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes. - * The two unused bit are set to 1. - * The ECC can correct single bit errors in a 256-byte page of data. - * Thus, two such ECC blocks are used on a 512-byte NAND page. - * - */ - -#ifndef __YAFFS_ECC_H__ -#define __YAFFS_ECC_H__ - -struct yaffs_ecc_other { - unsigned char col_parity; - unsigned line_parity; - unsigned line_parity_prime; -}; - -void yaffs_ecc_calc(const unsigned char *data, unsigned char *ecc); -int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc, - const unsigned char *test_ecc); - -void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes, - struct yaffs_ecc_other *ecc); -int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes, - struct yaffs_ecc_other *read_ecc, - const struct yaffs_ecc_other *test_ecc); -#endif diff --git a/fs/yaffs2/yaffs_error.c b/fs/yaffs2/yaffs_error.c deleted file mode 100644 index 11b75f7a0b2..00000000000 --- a/fs/yaffs2/yaffs_error.c +++ /dev/null @@ -1,58 +0,0 @@ -/* - * YAFFS: Yet another FFS. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Timothy Manning <timothy(a)yaffs.net> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffsfs.h" - -struct error_entry { - int code; - const char *text; -}; - -static const struct error_entry error_list[] = { - { ENOMEM , "ENOMEM" }, - { EBUSY , "EBUSY"}, - { ENODEV , "ENODEV"}, - { EINVAL , "EINVAL"}, - { EBADF , "EBADF"}, - { EACCES , "EACCES"}, - { EXDEV , "EXDEV" }, - { ENOENT , "ENOENT"}, - { ENOSPC , "ENOSPC"}, - { ERANGE , "ERANGE"}, - { ENODATA, "ENODATA"}, - { ENOTEMPTY, "ENOTEMPTY"}, - { ENAMETOOLONG, "ENAMETOOLONG"}, - { ENOMEM , "ENOMEM"}, - { EEXIST , "EEXIST"}, - { ENOTDIR , "ENOTDIR"}, - { EISDIR , "EISDIR"}, - { ENFILE, "ENFILE"}, - { EROFS, "EROFS"}, - { EFAULT, "EFAULT"}, - { 0, NULL } -}; - -const char *yaffs_error_to_str(int err) -{ - const struct error_entry *e = error_list; - - if (err < 0) - err = -err; - - while (e->code && e->text) { - if (err == e->code) - return e->text; - e++; - } - return "Unknown error code"; -} diff --git a/fs/yaffs2/yaffs_flashif.h b/fs/yaffs2/yaffs_flashif.h deleted file mode 100644 index 886901a0ff5..00000000000 --- a/fs/yaffs2/yaffs_flashif.h +++ /dev/null @@ -1,34 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_FLASH_H__ -#define __YAFFS_FLASH_H__ - -#include "yaffs_guts.h" -int yflash_EraseBlockInNAND(struct yaffs_dev *dev, int blockNumber); -int yflash_WriteChunkToNAND(struct yaffs_dev *dev, int nand_chunk, - const u8 *data, const struct yaffs_spare *spare); -int yflash_WriteChunkWithTagsToNAND(struct yaffs_dev *dev, int nand_chunk, - const u8 *data, const struct yaffs_ext_tags *tags); -int yflash_ReadChunkFromNAND(struct yaffs_dev *dev, int nand_chunk, - u8 *data, struct yaffs_spare *spare); -int yflash_ReadChunkWithTagsFromNAND(struct yaffs_dev *dev, int nand_chunk, - u8 *data, struct yaffs_ext_tags *tags); -int yflash_InitialiseNAND(struct yaffs_dev *dev); -int yflash_MarkNANDBlockBad(struct yaffs_dev *dev, int block_no); -int yflash_QueryNANDBlock(struct yaffs_dev *dev, int block_no, - enum yaffs_block_state *state, u32 *seq_number); - -#endif diff --git a/fs/yaffs2/yaffs_flashif2.h b/fs/yaffs2/yaffs_flashif2.h deleted file mode 100644 index c69862668b1..00000000000 --- a/fs/yaffs2/yaffs_flashif2.h +++ /dev/null @@ -1,34 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_FLASH2_H__ -#define __YAFFS_FLASH2_H__ - -#include "yaffs_guts.h" -int yflash2_EraseBlockInNAND(struct yaffs_dev *dev, int blockNumber); -int yflash2_WriteChunkToNAND(struct yaffs_dev *dev, int nand_chunk, - const u8 *data, const struct yaffs_spare *spare); -int yflash2_WriteChunkWithTagsToNAND(struct yaffs_dev *dev, int nand_chunk, - const u8 *data, const struct yaffs_ext_tags *tags); -int yflash2_ReadChunkFromNAND(struct yaffs_dev *dev, int nand_chunk, - u8 *data, struct yaffs_spare *spare); -int yflash2_ReadChunkWithTagsFromNAND(struct yaffs_dev *dev, int nand_chunk, - u8 *data, struct yaffs_ext_tags *tags); -int yflash2_InitialiseNAND(struct yaffs_dev *dev); -int yflash2_MarkNANDBlockBad(struct yaffs_dev *dev, int block_no); -int yflash2_QueryNANDBlock(struct yaffs_dev *dev, int block_no, - enum yaffs_block_state *state, u32 *seq_number); - -#endif diff --git a/fs/yaffs2/yaffs_getblockinfo.h b/fs/yaffs2/yaffs_getblockinfo.h deleted file mode 100644 index 8fd0802bddd..00000000000 --- a/fs/yaffs2/yaffs_getblockinfo.h +++ /dev/null @@ -1,35 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_GETBLOCKINFO_H__ -#define __YAFFS_GETBLOCKINFO_H__ - -#include "yaffs_guts.h" -#include "yaffs_trace.h" - -/* Function to manipulate block info */ -static inline struct yaffs_block_info *yaffs_get_block_info(struct yaffs_dev - *dev, int blk) -{ - if (blk < dev->internal_start_block || blk > dev->internal_end_block) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>> yaffs: get_block_info block %d is not valid", - blk); - BUG(); - } - return &dev->block_info[blk - dev->internal_start_block]; -} - -#endif diff --git a/fs/yaffs2/yaffs_guts.c b/fs/yaffs2/yaffs_guts.c deleted file mode 100644 index c20f2f8298f..00000000000 --- a/fs/yaffs2/yaffs_guts.c +++ /dev/null @@ -1,4995 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yportenv.h" -#include "yaffs_trace.h" -#include <dm/devres.h> - -#include "yaffs_guts.h" -#include "yaffs_getblockinfo.h" -#include "yaffs_tagscompat.h" -#include "yaffs_nand.h" -#include "yaffs_yaffs1.h" -#include "yaffs_yaffs2.h" -#include "yaffs_bitmap.h" -#include "yaffs_verify.h" -#include "yaffs_nand.h" -#include "yaffs_packedtags2.h" -#include "yaffs_nameval.h" -#include "yaffs_allocator.h" -#include "yaffs_attribs.h" -#include "yaffs_summary.h" - -/* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */ -#define YAFFS_GC_GOOD_ENOUGH 2 -#define YAFFS_GC_PASSIVE_THRESHOLD 4 - -#include "yaffs_ecc.h" - -/* Forward declarations */ - -static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk, - const u8 *buffer, int n_bytes, int use_reserve); - -/* Function to calculate chunk and offset */ - -void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr, - int *chunk_out, u32 *offset_out) -{ - int chunk; - u32 offset; - - chunk = (u32) (addr >> dev->chunk_shift); - - if (dev->chunk_div == 1) { - /* easy power of 2 case */ - offset = (u32) (addr & dev->chunk_mask); - } else { - /* Non power-of-2 case */ - - loff_t chunk_base; - - chunk /= dev->chunk_div; - - chunk_base = ((loff_t) chunk) * dev->data_bytes_per_chunk; - offset = (u32) (addr - chunk_base); - } - - *chunk_out = chunk; - *offset_out = offset; -} - -/* Function to return the number of shifts for a power of 2 greater than or - * equal to the given number - * Note we don't try to cater for all possible numbers and this does not have to - * be hellishly efficient. - */ - -static inline u32 calc_shifts_ceiling(u32 x) -{ - int extra_bits; - int shifts; - - shifts = extra_bits = 0; - - while (x > 1) { - if (x & 1) - extra_bits++; - x >>= 1; - shifts++; - } - - if (extra_bits) - shifts++; - - return shifts; -} - -/* Function to return the number of shifts to get a 1 in bit 0 - */ - -static inline u32 calc_shifts(u32 x) -{ - u32 shifts; - - shifts = 0; - - if (!x) - return 0; - - while (!(x & 1)) { - x >>= 1; - shifts++; - } - - return shifts; -} - -/* - * Temporary buffer manipulations. - */ - -static int yaffs_init_tmp_buffers(struct yaffs_dev *dev) -{ - int i; - u8 *buf = (u8 *) 1; - - memset(dev->temp_buffer, 0, sizeof(dev->temp_buffer)); - - for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) { - dev->temp_buffer[i].in_use = 0; - buf = kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); - dev->temp_buffer[i].buffer = buf; - } - - return buf ? YAFFS_OK : YAFFS_FAIL; -} - -u8 *yaffs_get_temp_buffer(struct yaffs_dev * dev) -{ - int i; - - dev->temp_in_use++; - if (dev->temp_in_use > dev->max_temp) - dev->max_temp = dev->temp_in_use; - - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->temp_buffer[i].in_use == 0) { - dev->temp_buffer[i].in_use = 1; - return dev->temp_buffer[i].buffer; - } - } - - yaffs_trace(YAFFS_TRACE_BUFFERS, "Out of temp buffers"); - /* - * If we got here then we have to allocate an unmanaged one - * This is not good. - */ - - dev->unmanaged_buffer_allocs++; - return kmalloc(dev->data_bytes_per_chunk, GFP_NOFS); - -} - -void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 *buffer) -{ - int i; - - dev->temp_in_use--; - - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->temp_buffer[i].buffer == buffer) { - dev->temp_buffer[i].in_use = 0; - return; - } - } - - if (buffer) { - /* assume it is an unmanaged one. */ - yaffs_trace(YAFFS_TRACE_BUFFERS, - "Releasing unmanaged temp buffer"); - kfree(buffer); - dev->unmanaged_buffer_deallocs++; - } - -} - -/* - * Determine if we have a managed buffer. - */ -int yaffs_is_managed_tmp_buffer(struct yaffs_dev *dev, const u8 *buffer) -{ - int i; - - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->temp_buffer[i].buffer == buffer) - return 1; - } - - for (i = 0; i < dev->param.n_caches; i++) { - if (dev->cache[i].data == buffer) - return 1; - } - - if (buffer == dev->checkpt_buffer) - return 1; - - yaffs_trace(YAFFS_TRACE_ALWAYS, - "yaffs: unmaged buffer detected."); - return 0; -} - -/* - * Functions for robustisizing TODO - * - */ - -static void yaffs_handle_chunk_wr_ok(struct yaffs_dev *dev, int nand_chunk, - const u8 *data, - const struct yaffs_ext_tags *tags) -{ -} - -static void yaffs_handle_chunk_update(struct yaffs_dev *dev, int nand_chunk, - const struct yaffs_ext_tags *tags) -{ -} - -void yaffs_handle_chunk_error(struct yaffs_dev *dev, - struct yaffs_block_info *bi) -{ - if (!bi->gc_prioritise) { - bi->gc_prioritise = 1; - dev->has_pending_prioritised_gc = 1; - bi->chunk_error_strikes++; - - if (bi->chunk_error_strikes > 3) { - bi->needs_retiring = 1; /* Too many stikes, so retire */ - yaffs_trace(YAFFS_TRACE_ALWAYS, - "yaffs: Block struck out"); - - } - } -} - -static void yaffs_handle_chunk_wr_error(struct yaffs_dev *dev, int nand_chunk, - int erased_ok) -{ - int flash_block = nand_chunk / dev->param.chunks_per_block; - struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block); - - yaffs_handle_chunk_error(dev, bi); - - if (erased_ok) { - /* Was an actual write failure, - * so mark the block for retirement.*/ - bi->needs_retiring = 1; - yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - "**>> Block %d needs retiring", flash_block); - } - - /* Delete the chunk */ - yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); - yaffs_skip_rest_of_block(dev); -} - -/* - * Verification code - */ - -/* - * Simple hash function. Needs to have a reasonable spread - */ - -static inline int yaffs_hash_fn(int n) -{ - if (n < 0) - n = -n; - return n % YAFFS_NOBJECT_BUCKETS; -} - -/* - * Access functions to useful fake objects. - * Note that root might have a presence in NAND if permissions are set. - */ - -struct yaffs_obj *yaffs_root(struct yaffs_dev *dev) -{ - return dev->root_dir; -} - -struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev) -{ - return dev->lost_n_found; -} - -/* - * Erased NAND checking functions - */ - -int yaffs_check_ff(u8 *buffer, int n_bytes) -{ - /* Horrible, slow implementation */ - while (n_bytes--) { - if (*buffer != 0xff) - return 0; - buffer++; - } - return 1; -} - -static int yaffs_check_chunk_erased(struct yaffs_dev *dev, int nand_chunk) -{ - int retval = YAFFS_OK; - u8 *data = yaffs_get_temp_buffer(dev); - struct yaffs_ext_tags tags; - - yaffs_rd_chunk_tags_nand(dev, nand_chunk, data, &tags); - - if (tags.ecc_result > YAFFS_ECC_RESULT_NO_ERROR) - retval = YAFFS_FAIL; - - if (!yaffs_check_ff(data, dev->data_bytes_per_chunk) || - tags.chunk_used) { - yaffs_trace(YAFFS_TRACE_NANDACCESS, - "Chunk %d not erased", nand_chunk); - retval = YAFFS_FAIL; - } - - yaffs_release_temp_buffer(dev, data); - - return retval; - -} - -static int yaffs_verify_chunk_written(struct yaffs_dev *dev, - int nand_chunk, - const u8 *data, - struct yaffs_ext_tags *tags) -{ - int retval = YAFFS_OK; - struct yaffs_ext_tags temp_tags; - u8 *buffer = yaffs_get_temp_buffer(dev); - - yaffs_rd_chunk_tags_nand(dev, nand_chunk, buffer, &temp_tags); - if (memcmp(buffer, data, dev->data_bytes_per_chunk) || - temp_tags.obj_id != tags->obj_id || - temp_tags.chunk_id != tags->chunk_id || - temp_tags.n_bytes != tags->n_bytes) - retval = YAFFS_FAIL; - - yaffs_release_temp_buffer(dev, buffer); - - return retval; -} - -int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks) -{ - int reserved_chunks; - int reserved_blocks = dev->param.n_reserved_blocks; - int checkpt_blocks; - - checkpt_blocks = yaffs_calc_checkpt_blocks_required(dev); - - reserved_chunks = - (reserved_blocks + checkpt_blocks) * dev->param.chunks_per_block; - - return (dev->n_free_chunks > (reserved_chunks + n_chunks)); -} - -static int yaffs_find_alloc_block(struct yaffs_dev *dev) -{ - int i; - struct yaffs_block_info *bi; - - if (dev->n_erased_blocks < 1) { - /* Hoosterman we've got a problem. - * Can't get space to gc - */ - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs tragedy: no more erased blocks"); - - return -1; - } - - /* Find an empty block. */ - - for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { - dev->alloc_block_finder++; - if (dev->alloc_block_finder < dev->internal_start_block - || dev->alloc_block_finder > dev->internal_end_block) { - dev->alloc_block_finder = dev->internal_start_block; - } - - bi = yaffs_get_block_info(dev, dev->alloc_block_finder); - - if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) { - bi->block_state = YAFFS_BLOCK_STATE_ALLOCATING; - dev->seq_number++; - bi->seq_number = dev->seq_number; - dev->n_erased_blocks--; - yaffs_trace(YAFFS_TRACE_ALLOCATE, - "Allocated block %d, seq %d, %d left" , - dev->alloc_block_finder, dev->seq_number, - dev->n_erased_blocks); - return dev->alloc_block_finder; - } - } - - yaffs_trace(YAFFS_TRACE_ALWAYS, - "yaffs tragedy: no more erased blocks, but there should have been %d", - dev->n_erased_blocks); - - return -1; -} - -static int yaffs_alloc_chunk(struct yaffs_dev *dev, int use_reserver, - struct yaffs_block_info **block_ptr) -{ - int ret_val; - struct yaffs_block_info *bi; - - if (dev->alloc_block < 0) { - /* Get next block to allocate off */ - dev->alloc_block = yaffs_find_alloc_block(dev); - dev->alloc_page = 0; - } - - if (!use_reserver && !yaffs_check_alloc_available(dev, 1)) { - /* No space unless we're allowed to use the reserve. */ - return -1; - } - - if (dev->n_erased_blocks < dev->param.n_reserved_blocks - && dev->alloc_page == 0) - yaffs_trace(YAFFS_TRACE_ALLOCATE, "Allocating reserve"); - - /* Next page please.... */ - if (dev->alloc_block >= 0) { - bi = yaffs_get_block_info(dev, dev->alloc_block); - - ret_val = (dev->alloc_block * dev->param.chunks_per_block) + - dev->alloc_page; - bi->pages_in_use++; - yaffs_set_chunk_bit(dev, dev->alloc_block, dev->alloc_page); - - dev->alloc_page++; - - dev->n_free_chunks--; - - /* If the block is full set the state to full */ - if (dev->alloc_page >= dev->param.chunks_per_block) { - bi->block_state = YAFFS_BLOCK_STATE_FULL; - dev->alloc_block = -1; - } - - if (block_ptr) - *block_ptr = bi; - - return ret_val; - } - - yaffs_trace(YAFFS_TRACE_ERROR, - "!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!"); - - return -1; -} - -static int yaffs_get_erased_chunks(struct yaffs_dev *dev) -{ - int n; - - n = dev->n_erased_blocks * dev->param.chunks_per_block; - - if (dev->alloc_block > 0) - n += (dev->param.chunks_per_block - dev->alloc_page); - - return n; - -} - -/* - * yaffs_skip_rest_of_block() skips over the rest of the allocation block - * if we don't want to write to it. - */ -void yaffs_skip_rest_of_block(struct yaffs_dev *dev) -{ - struct yaffs_block_info *bi; - - if (dev->alloc_block > 0) { - bi = yaffs_get_block_info(dev, dev->alloc_block); - if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) { - bi->block_state = YAFFS_BLOCK_STATE_FULL; - dev->alloc_block = -1; - } - } -} - -static int yaffs_write_new_chunk(struct yaffs_dev *dev, - const u8 *data, - struct yaffs_ext_tags *tags, int use_reserver) -{ - int attempts = 0; - int write_ok = 0; - int chunk; - - yaffs2_checkpt_invalidate(dev); - - do { - struct yaffs_block_info *bi = 0; - int erased_ok = 0; - - chunk = yaffs_alloc_chunk(dev, use_reserver, &bi); - if (chunk < 0) { - /* no space */ - break; - } - - /* First check this chunk is erased, if it needs - * checking. The checking policy (unless forced - * always on) is as follows: - * - * Check the first page we try to write in a block. - * If the check passes then we don't need to check any - * more. If the check fails, we check again... - * If the block has been erased, we don't need to check. - * - * However, if the block has been prioritised for gc, - * then we think there might be something odd about - * this block and stop using it. - * - * Rationale: We should only ever see chunks that have - * not been erased if there was a partially written - * chunk due to power loss. This checking policy should - * catch that case with very few checks and thus save a - * lot of checks that are most likely not needed. - * - * Mods to the above - * If an erase check fails or the write fails we skip the - * rest of the block. - */ - - /* let's give it a try */ - attempts++; - - if (dev->param.always_check_erased) - bi->skip_erased_check = 0; - - if (!bi->skip_erased_check) { - erased_ok = yaffs_check_chunk_erased(dev, chunk); - if (erased_ok != YAFFS_OK) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>> yaffs chunk %d was not erased", - chunk); - - /* If not erased, delete this one, - * skip rest of block and - * try another chunk */ - yaffs_chunk_del(dev, chunk, 1, __LINE__); - yaffs_skip_rest_of_block(dev); - continue; - } - } - - write_ok = yaffs_wr_chunk_tags_nand(dev, chunk, data, tags); - - if (!bi->skip_erased_check) - write_ok = - yaffs_verify_chunk_written(dev, chunk, data, tags); - - if (write_ok != YAFFS_OK) { - /* Clean up aborted write, skip to next block and - * try another chunk */ - yaffs_handle_chunk_wr_error(dev, chunk, erased_ok); - continue; - } - - bi->skip_erased_check = 1; - - /* Copy the data into the robustification buffer */ - yaffs_handle_chunk_wr_ok(dev, chunk, data, tags); - - } while (write_ok != YAFFS_OK && - (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts)); - - if (!write_ok) - chunk = -1; - - if (attempts > 1) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>> yaffs write required %d attempts", - attempts); - dev->n_retried_writes += (attempts - 1); - } - - return chunk; -} - -/* - * Block retiring for handling a broken block. - */ - -static void yaffs_retire_block(struct yaffs_dev *dev, int flash_block) -{ - struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block); - - yaffs2_checkpt_invalidate(dev); - - yaffs2_clear_oldest_dirty_seq(dev, bi); - - if (yaffs_mark_bad(dev, flash_block) != YAFFS_OK) { - if (yaffs_erase_block(dev, flash_block) != YAFFS_OK) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "yaffs: Failed to mark bad and erase block %d", - flash_block); - } else { - struct yaffs_ext_tags tags; - int chunk_id = - flash_block * dev->param.chunks_per_block; - - u8 *buffer = yaffs_get_temp_buffer(dev); - - memset(buffer, 0xff, dev->data_bytes_per_chunk); - memset(&tags, 0, sizeof(tags)); - tags.seq_number = YAFFS_SEQUENCE_BAD_BLOCK; - if (dev->param.write_chunk_tags_fn(dev, chunk_id - - dev->chunk_offset, - buffer, - &tags) != YAFFS_OK) - yaffs_trace(YAFFS_TRACE_ALWAYS, - "yaffs: Failed to write bad block marker to block %d", - flash_block); - - yaffs_release_temp_buffer(dev, buffer); - } - } - - bi->block_state = YAFFS_BLOCK_STATE_DEAD; - bi->gc_prioritise = 0; - bi->needs_retiring = 0; - - dev->n_retired_blocks++; -} - -/*---------------- Name handling functions ------------*/ - -static u16 yaffs_calc_name_sum(const YCHAR *name) -{ - u16 sum = 0; - u16 i = 1; - - if (!name) - return 0; - - while ((*name) && i < (YAFFS_MAX_NAME_LENGTH / 2)) { - - /* 0x1f mask is case insensitive */ - sum += ((*name) & 0x1f) * i; - i++; - name++; - } - return sum; -} - -void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR * name) -{ - memset(obj->short_name, 0, sizeof(obj->short_name)); - if (name && - yaffs_strnlen(name, YAFFS_SHORT_NAME_LENGTH + 1) <= - YAFFS_SHORT_NAME_LENGTH) - yaffs_strcpy(obj->short_name, name); - else - obj->short_name[0] = _Y('\0'); - obj->sum = yaffs_calc_name_sum(name); -} - -void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj, - const struct yaffs_obj_hdr *oh) -{ -#ifdef CONFIG_YAFFS_AUTO_UNICODE - YCHAR tmp_name[YAFFS_MAX_NAME_LENGTH + 1]; - memset(tmp_name, 0, sizeof(tmp_name)); - yaffs_load_name_from_oh(obj->my_dev, tmp_name, oh->name, - YAFFS_MAX_NAME_LENGTH + 1); - yaffs_set_obj_name(obj, tmp_name); -#else - yaffs_set_obj_name(obj, oh->name); -#endif -} - -loff_t yaffs_max_file_size(struct yaffs_dev *dev) -{ - return ((loff_t) YAFFS_MAX_CHUNK_ID) * dev->data_bytes_per_chunk; -} - -/*-------------------- TNODES ------------------- - - * List of spare tnodes - * The list is hooked together using the first pointer - * in the tnode. - */ - -struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev) -{ - struct yaffs_tnode *tn = yaffs_alloc_raw_tnode(dev); - - if (tn) { - memset(tn, 0, dev->tnode_size); - dev->n_tnodes++; - } - - dev->checkpoint_blocks_required = 0; /* force recalculation */ - - return tn; -} - -/* FreeTnode frees up a tnode and puts it back on the free list */ -static void yaffs_free_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn) -{ - yaffs_free_raw_tnode(dev, tn); - dev->n_tnodes--; - dev->checkpoint_blocks_required = 0; /* force recalculation */ -} - -static void yaffs_deinit_tnodes_and_objs(struct yaffs_dev *dev) -{ - yaffs_deinit_raw_tnodes_and_objs(dev); - dev->n_obj = 0; - dev->n_tnodes = 0; -} - -void yaffs_load_tnode_0(struct yaffs_dev *dev, struct yaffs_tnode *tn, - unsigned pos, unsigned val) -{ - u32 *map = (u32 *) tn; - u32 bit_in_map; - u32 bit_in_word; - u32 word_in_map; - u32 mask; - - pos &= YAFFS_TNODES_LEVEL0_MASK; - val >>= dev->chunk_grp_bits; - - bit_in_map = pos * dev->tnode_width; - word_in_map = bit_in_map / 32; - bit_in_word = bit_in_map & (32 - 1); - - mask = dev->tnode_mask << bit_in_word; - - map[word_in_map] &= ~mask; - map[word_in_map] |= (mask & (val << bit_in_word)); - - if (dev->tnode_width > (32 - bit_in_word)) { - bit_in_word = (32 - bit_in_word); - word_in_map++; - mask = - dev->tnode_mask >> bit_in_word; - map[word_in_map] &= ~mask; - map[word_in_map] |= (mask & (val >> bit_in_word)); - } -} - -u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn, - unsigned pos) -{ - u32 *map = (u32 *) tn; - u32 bit_in_map; - u32 bit_in_word; - u32 word_in_map; - u32 val; - - pos &= YAFFS_TNODES_LEVEL0_MASK; - - bit_in_map = pos * dev->tnode_width; - word_in_map = bit_in_map / 32; - bit_in_word = bit_in_map & (32 - 1); - - val = map[word_in_map] >> bit_in_word; - - if (dev->tnode_width > (32 - bit_in_word)) { - bit_in_word = (32 - bit_in_word); - word_in_map++; - val |= (map[word_in_map] << bit_in_word); - } - - val &= dev->tnode_mask; - val <<= dev->chunk_grp_bits; - - return val; -} - -/* ------------------- End of individual tnode manipulation -----------------*/ - -/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------ - * The look up tree is represented by the top tnode and the number of top_level - * in the tree. 0 means only the level 0 tnode is in the tree. - */ - -/* FindLevel0Tnode finds the level 0 tnode, if one exists. */ -struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev, - struct yaffs_file_var *file_struct, - u32 chunk_id) -{ - struct yaffs_tnode *tn = file_struct->top; - u32 i; - int required_depth; - int level = file_struct->top_level; - - /* Check sane level and chunk Id */ - if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) - return NULL; - - if (chunk_id > YAFFS_MAX_CHUNK_ID) - return NULL; - - /* First check we're tall enough (ie enough top_level) */ - - i = chunk_id >> YAFFS_TNODES_LEVEL0_BITS; - required_depth = 0; - while (i) { - i >>= YAFFS_TNODES_INTERNAL_BITS; - required_depth++; - } - - if (required_depth > file_struct->top_level) - return NULL; /* Not tall enough, so we can't find it */ - - /* Traverse down to level 0 */ - while (level > 0 && tn) { - tn = tn->internal[(chunk_id >> - (YAFFS_TNODES_LEVEL0_BITS + - (level - 1) * - YAFFS_TNODES_INTERNAL_BITS)) & - YAFFS_TNODES_INTERNAL_MASK]; - level--; - } - - return tn; -} - -/* add_find_tnode_0 finds the level 0 tnode if it exists, - * otherwise first expands the tree. - * This happens in two steps: - * 1. If the tree isn't tall enough, then make it taller. - * 2. Scan down the tree towards the level 0 tnode adding tnodes if required. - * - * Used when modifying the tree. - * - * If the tn argument is NULL, then a fresh tnode will be added otherwise the - * specified tn will be plugged into the ttree. - */ - -struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev, - struct yaffs_file_var *file_struct, - u32 chunk_id, - struct yaffs_tnode *passed_tn) -{ - int required_depth; - int i; - int l; - struct yaffs_tnode *tn; - u32 x; - - /* Check sane level and page Id */ - if (file_struct->top_level < 0 || - file_struct->top_level > YAFFS_TNODES_MAX_LEVEL) - return NULL; - - if (chunk_id > YAFFS_MAX_CHUNK_ID) - return NULL; - - /* First check we're tall enough (ie enough top_level) */ - - x = chunk_id >> YAFFS_TNODES_LEVEL0_BITS; - required_depth = 0; - while (x) { - x >>= YAFFS_TNODES_INTERNAL_BITS; - required_depth++; - } - - if (required_depth > file_struct->top_level) { - /* Not tall enough, gotta make the tree taller */ - for (i = file_struct->top_level; i < required_depth; i++) { - - tn = yaffs_get_tnode(dev); - - if (tn) { - tn->internal[0] = file_struct->top; - file_struct->top = tn; - file_struct->top_level++; - } else { - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs: no more tnodes"); - return NULL; - } - } - } - - /* Traverse down to level 0, adding anything we need */ - - l = file_struct->top_level; - tn = file_struct->top; - - if (l > 0) { - while (l > 0 && tn) { - x = (chunk_id >> - (YAFFS_TNODES_LEVEL0_BITS + - (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) & - YAFFS_TNODES_INTERNAL_MASK; - - if ((l > 1) && !tn->internal[x]) { - /* Add missing non-level-zero tnode */ - tn->internal[x] = yaffs_get_tnode(dev); - if (!tn->internal[x]) - return NULL; - } else if (l == 1) { - /* Looking from level 1 at level 0 */ - if (passed_tn) { - /* If we already have one, release it */ - if (tn->internal[x]) - yaffs_free_tnode(dev, - tn->internal[x]); - tn->internal[x] = passed_tn; - - } else if (!tn->internal[x]) { - /* Don't have one, none passed in */ - tn->internal[x] = yaffs_get_tnode(dev); - if (!tn->internal[x]) - return NULL; - } - } - - tn = tn->internal[x]; - l--; - } - } else { - /* top is level 0 */ - if (passed_tn) { - memcpy(tn, passed_tn, - (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8); - yaffs_free_tnode(dev, passed_tn); - } - } - - return tn; -} - -static int yaffs_tags_match(const struct yaffs_ext_tags *tags, int obj_id, - int chunk_obj) -{ - return (tags->chunk_id == chunk_obj && - tags->obj_id == obj_id && - !tags->is_deleted) ? 1 : 0; - -} - -static int yaffs_find_chunk_in_group(struct yaffs_dev *dev, int the_chunk, - struct yaffs_ext_tags *tags, int obj_id, - int inode_chunk) -{ - int j; - - for (j = 0; the_chunk && j < dev->chunk_grp_size; j++) { - if (yaffs_check_chunk_bit - (dev, the_chunk / dev->param.chunks_per_block, - the_chunk % dev->param.chunks_per_block)) { - - if (dev->chunk_grp_size == 1) - return the_chunk; - else { - yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL, - tags); - if (yaffs_tags_match(tags, - obj_id, inode_chunk)) { - /* found it; */ - return the_chunk; - } - } - } - the_chunk++; - } - return -1; -} - -static int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk, - struct yaffs_ext_tags *tags) -{ - /*Get the Tnode, then get the level 0 offset chunk offset */ - struct yaffs_tnode *tn; - int the_chunk = -1; - struct yaffs_ext_tags local_tags; - int ret_val = -1; - struct yaffs_dev *dev = in->my_dev; - - if (!tags) { - /* Passed a NULL, so use our own tags space */ - tags = &local_tags; - } - - tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); - - if (!tn) - return ret_val; - - the_chunk = yaffs_get_group_base(dev, tn, inode_chunk); - - ret_val = yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id, - inode_chunk); - return ret_val; -} - -static int yaffs_find_del_file_chunk(struct yaffs_obj *in, int inode_chunk, - struct yaffs_ext_tags *tags) -{ - /* Get the Tnode, then get the level 0 offset chunk offset */ - struct yaffs_tnode *tn; - int the_chunk = -1; - struct yaffs_ext_tags local_tags; - struct yaffs_dev *dev = in->my_dev; - int ret_val = -1; - - if (!tags) { - /* Passed a NULL, so use our own tags space */ - tags = &local_tags; - } - - tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); - - if (!tn) - return ret_val; - - the_chunk = yaffs_get_group_base(dev, tn, inode_chunk); - - ret_val = yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id, - inode_chunk); - - /* Delete the entry in the filestructure (if found) */ - if (ret_val != -1) - yaffs_load_tnode_0(dev, tn, inode_chunk, 0); - - return ret_val; -} - -int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk, - int nand_chunk, int in_scan) -{ - /* NB in_scan is zero unless scanning. - * For forward scanning, in_scan is > 0; - * for backward scanning in_scan is < 0 - * - * nand_chunk = 0 is a dummy insert to make sure the tnodes are there. - */ - - struct yaffs_tnode *tn; - struct yaffs_dev *dev = in->my_dev; - int existing_cunk; - struct yaffs_ext_tags existing_tags; - struct yaffs_ext_tags new_tags; - unsigned existing_serial, new_serial; - - if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) { - /* Just ignore an attempt at putting a chunk into a non-file - * during scanning. - * If it is not during Scanning then something went wrong! - */ - if (!in_scan) { - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs tragedy:attempt to put data chunk into a non-file" - ); - BUG(); - } - - yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); - return YAFFS_OK; - } - - tn = yaffs_add_find_tnode_0(dev, - &in->variant.file_variant, - inode_chunk, NULL); - if (!tn) - return YAFFS_FAIL; - - if (!nand_chunk) - /* Dummy insert, bail now */ - return YAFFS_OK; - - existing_cunk = yaffs_get_group_base(dev, tn, inode_chunk); - - if (in_scan != 0) { - /* If we're scanning then we need to test for duplicates - * NB This does not need to be efficient since it should only - * happen when the power fails during a write, then only one - * chunk should ever be affected. - * - * Correction for YAFFS2: This could happen quite a lot and we - * need to think about efficiency! TODO - * Update: For backward scanning we don't need to re-read tags - * so this is quite cheap. - */ - - if (existing_cunk > 0) { - /* NB Right now existing chunk will not be real - * chunk_id if the chunk group size > 1 - * thus we have to do a FindChunkInFile to get the - * real chunk id. - * - * We have a duplicate now we need to decide which - * one to use: - * - * Backwards scanning YAFFS2: The old one is what - * we use, dump the new one. - * YAFFS1: Get both sets of tags and compare serial - * numbers. - */ - - if (in_scan > 0) { - /* Only do this for forward scanning */ - yaffs_rd_chunk_tags_nand(dev, - nand_chunk, - NULL, &new_tags); - - /* Do a proper find */ - existing_cunk = - yaffs_find_chunk_in_file(in, inode_chunk, - &existing_tags); - } - - if (existing_cunk <= 0) { - /*Hoosterman - how did this happen? */ - - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs tragedy: existing chunk < 0 in scan" - ); - - } - - /* NB The deleted flags should be false, otherwise - * the chunks will not be loaded during a scan - */ - - if (in_scan > 0) { - new_serial = new_tags.serial_number; - existing_serial = existing_tags.serial_number; - } - - if ((in_scan > 0) && - (existing_cunk <= 0 || - ((existing_serial + 1) & 3) == new_serial)) { - /* Forward scanning. - * Use new - * Delete the old one and drop through to - * update the tnode - */ - yaffs_chunk_del(dev, existing_cunk, 1, - __LINE__); - } else { - /* Backward scanning or we want to use the - * existing one - * Delete the new one and return early so that - * the tnode isn't changed - */ - yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); - return YAFFS_OK; - } - } - - } - - if (existing_cunk == 0) - in->n_data_chunks++; - - yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk); - - return YAFFS_OK; -} - -static void yaffs_soft_del_chunk(struct yaffs_dev *dev, int chunk) -{ - struct yaffs_block_info *the_block; - unsigned block_no; - - yaffs_trace(YAFFS_TRACE_DELETION, "soft delete chunk %d", chunk); - - block_no = chunk / dev->param.chunks_per_block; - the_block = yaffs_get_block_info(dev, block_no); - if (the_block) { - the_block->soft_del_pages++; - dev->n_free_chunks++; - yaffs2_update_oldest_dirty_seq(dev, block_no, the_block); - } -} - -/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all - * the chunks in the file. - * All soft deleting does is increment the block's softdelete count and pulls - * the chunk out of the tnode. - * Thus, essentially this is the same as DeleteWorker except that the chunks - * are soft deleted. - */ - -static int yaffs_soft_del_worker(struct yaffs_obj *in, struct yaffs_tnode *tn, - u32 level, int chunk_offset) -{ - int i; - int the_chunk; - int all_done = 1; - struct yaffs_dev *dev = in->my_dev; - - if (!tn) - return 1; - - if (level > 0) { - for (i = YAFFS_NTNODES_INTERNAL - 1; - all_done && i >= 0; - i--) { - if (tn->internal[i]) { - all_done = - yaffs_soft_del_worker(in, - tn->internal[i], - level - 1, - (chunk_offset << - YAFFS_TNODES_INTERNAL_BITS) - + i); - if (all_done) { - yaffs_free_tnode(dev, - tn->internal[i]); - tn->internal[i] = NULL; - } else { - /* Can this happen? */ - } - } - } - return (all_done) ? 1 : 0; - } - - /* level 0 */ - for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) { - the_chunk = yaffs_get_group_base(dev, tn, i); - if (the_chunk) { - yaffs_soft_del_chunk(dev, the_chunk); - yaffs_load_tnode_0(dev, tn, i, 0); - } - } - return 1; -} - -static void yaffs_remove_obj_from_dir(struct yaffs_obj *obj) -{ - struct yaffs_dev *dev = obj->my_dev; - struct yaffs_obj *parent; - - yaffs_verify_obj_in_dir(obj); - parent = obj->parent; - - yaffs_verify_dir(parent); - - if (dev && dev->param.remove_obj_fn) - dev->param.remove_obj_fn(obj); - - list_del_init(&obj->siblings); - obj->parent = NULL; - - yaffs_verify_dir(parent); -} - -void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj) -{ - if (!directory) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "tragedy: Trying to add an object to a null pointer directory" - ); - BUG(); - return; - } - if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "tragedy: Trying to add an object to a non-directory" - ); - BUG(); - } - - if (obj->siblings.prev == NULL) { - /* Not initialised */ - BUG(); - } - - yaffs_verify_dir(directory); - - yaffs_remove_obj_from_dir(obj); - - /* Now add it */ - list_add(&obj->siblings, &directory->variant.dir_variant.children); - obj->parent = directory; - - if (directory == obj->my_dev->unlinked_dir - || directory == obj->my_dev->del_dir) { - obj->unlinked = 1; - obj->my_dev->n_unlinked_files++; - obj->rename_allowed = 0; - } - - yaffs_verify_dir(directory); - yaffs_verify_obj_in_dir(obj); -} - -static int yaffs_change_obj_name(struct yaffs_obj *obj, - struct yaffs_obj *new_dir, - const YCHAR *new_name, int force, int shadows) -{ - int unlink_op; - int del_op; - struct yaffs_obj *existing_target; - - if (new_dir == NULL) - new_dir = obj->parent; /* use the old directory */ - - if (new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "tragedy: yaffs_change_obj_name: new_dir is not a directory" - ); - BUG(); - } - - unlink_op = (new_dir == obj->my_dev->unlinked_dir); - del_op = (new_dir == obj->my_dev->del_dir); - - existing_target = yaffs_find_by_name(new_dir, new_name); - - /* If the object is a file going into the unlinked directory, - * then it is OK to just stuff it in since duplicate names are OK. - * else only proceed if the new name does not exist and we're putting - * it into a directory. - */ - if (!(unlink_op || del_op || force || - shadows > 0 || !existing_target) || - new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) - return YAFFS_FAIL; - - yaffs_set_obj_name(obj, new_name); - obj->dirty = 1; - yaffs_add_obj_to_dir(new_dir, obj); - - if (unlink_op) - obj->unlinked = 1; - - /* If it is a deletion then we mark it as a shrink for gc */ - if (yaffs_update_oh(obj, new_name, 0, del_op, shadows, NULL) >= 0) - return YAFFS_OK; - - return YAFFS_FAIL; -} - -/*------------------------ Short Operations Cache ------------------------------ - * In many situations where there is no high level buffering a lot of - * reads might be short sequential reads, and a lot of writes may be short - * sequential writes. eg. scanning/writing a jpeg file. - * In these cases, a short read/write cache can provide a huge perfomance - * benefit with dumb-as-a-rock code. - * In Linux, the page cache provides read buffering and the short op cache - * provides write buffering. - * - * There are a small number (~10) of cache chunks per device so that we don't - * need a very intelligent search. - */ - -static int yaffs_obj_cache_dirty(struct yaffs_obj *obj) -{ - struct yaffs_dev *dev = obj->my_dev; - int i; - struct yaffs_cache *cache; - int n_caches = obj->my_dev->param.n_caches; - - for (i = 0; i < n_caches; i++) { - cache = &dev->cache[i]; - if (cache->object == obj && cache->dirty) - return 1; - } - - return 0; -} - -static void yaffs_flush_file_cache(struct yaffs_obj *obj) -{ - struct yaffs_dev *dev = obj->my_dev; - int lowest = -99; /* Stop compiler whining. */ - int i; - struct yaffs_cache *cache; - int chunk_written = 0; - int n_caches = obj->my_dev->param.n_caches; - - if (n_caches < 1) - return; - do { - cache = NULL; - - /* Find the lowest dirty chunk for this object */ - for (i = 0; i < n_caches; i++) { - if (dev->cache[i].object == obj && - dev->cache[i].dirty) { - if (!cache || - dev->cache[i].chunk_id < lowest) { - cache = &dev->cache[i]; - lowest = cache->chunk_id; - } - } - } - - if (cache && !cache->locked) { - /* Write it out and free it up */ - chunk_written = - yaffs_wr_data_obj(cache->object, - cache->chunk_id, - cache->data, - cache->n_bytes, 1); - cache->dirty = 0; - cache->object = NULL; - } - } while (cache && chunk_written > 0); - - if (cache) - /* Hoosterman, disk full while writing cache out. */ - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs tragedy: no space during cache write"); -} - -/*yaffs_flush_whole_cache(dev) - * - * - */ - -void yaffs_flush_whole_cache(struct yaffs_dev *dev) -{ - struct yaffs_obj *obj; - int n_caches = dev->param.n_caches; - int i; - - /* Find a dirty object in the cache and flush it... - * until there are no further dirty objects. - */ - do { - obj = NULL; - for (i = 0; i < n_caches && !obj; i++) { - if (dev->cache[i].object && dev->cache[i].dirty) - obj = dev->cache[i].object; - } - if (obj) - yaffs_flush_file_cache(obj); - } while (obj); - -} - -/* Grab us a cache chunk for use. - * First look for an empty one. - * Then look for the least recently used non-dirty one. - * Then look for the least recently used dirty one...., flush and look again. - */ -static struct yaffs_cache *yaffs_grab_chunk_worker(struct yaffs_dev *dev) -{ - int i; - - if (dev->param.n_caches > 0) { - for (i = 0; i < dev->param.n_caches; i++) { - if (!dev->cache[i].object) - return &dev->cache[i]; - } - } - return NULL; -} - -static struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev) -{ - struct yaffs_cache *cache; - struct yaffs_obj *the_obj; - int usage; - int i; - - if (dev->param.n_caches < 1) - return NULL; - - /* Try find a non-dirty one... */ - - cache = yaffs_grab_chunk_worker(dev); - - if (!cache) { - /* They were all dirty, find the LRU object and flush - * its cache, then find again. - * NB what's here is not very accurate, - * we actually flush the object with the LRU chunk. - */ - - /* With locking we can't assume we can use entry zero, - * Set the_obj to a valid pointer for Coverity. */ - the_obj = dev->cache[0].object; - usage = -1; - cache = NULL; - - for (i = 0; i < dev->param.n_caches; i++) { - if (dev->cache[i].object && - !dev->cache[i].locked && - (dev->cache[i].last_use < usage || - !cache)) { - usage = dev->cache[i].last_use; - the_obj = dev->cache[i].object; - cache = &dev->cache[i]; - } - } - - if (!cache || cache->dirty) { - /* Flush and try again */ - yaffs_flush_file_cache(the_obj); - cache = yaffs_grab_chunk_worker(dev); - } - } - return cache; -} - -/* Find a cached chunk */ -static struct yaffs_cache *yaffs_find_chunk_cache(const struct yaffs_obj *obj, - int chunk_id) -{ - struct yaffs_dev *dev = obj->my_dev; - int i; - - if (dev->param.n_caches < 1) - return NULL; - - for (i = 0; i < dev->param.n_caches; i++) { - if (dev->cache[i].object == obj && - dev->cache[i].chunk_id == chunk_id) { - dev->cache_hits++; - - return &dev->cache[i]; - } - } - return NULL; -} - -/* Mark the chunk for the least recently used algorithym */ -static void yaffs_use_cache(struct yaffs_dev *dev, struct yaffs_cache *cache, - int is_write) -{ - int i; - - if (dev->param.n_caches < 1) - return; - - if (dev->cache_last_use < 0 || - dev->cache_last_use > 100000000) { - /* Reset the cache usages */ - for (i = 1; i < dev->param.n_caches; i++) - dev->cache[i].last_use = 0; - - dev->cache_last_use = 0; - } - dev->cache_last_use++; - cache->last_use = dev->cache_last_use; - - if (is_write) - cache->dirty = 1; -} - -/* Invalidate a single cache page. - * Do this when a whole page gets written, - * ie the short cache for this page is no longer valid. - */ -static void yaffs_invalidate_chunk_cache(struct yaffs_obj *object, int chunk_id) -{ - struct yaffs_cache *cache; - - if (object->my_dev->param.n_caches > 0) { - cache = yaffs_find_chunk_cache(object, chunk_id); - - if (cache) - cache->object = NULL; - } -} - -/* Invalidate all the cache pages associated with this object - * Do this whenever ther file is deleted or resized. - */ -static void yaffs_invalidate_whole_cache(struct yaffs_obj *in) -{ - int i; - struct yaffs_dev *dev = in->my_dev; - - if (dev->param.n_caches > 0) { - /* Invalidate it. */ - for (i = 0; i < dev->param.n_caches; i++) { - if (dev->cache[i].object == in) - dev->cache[i].object = NULL; - } - } -} - -static void yaffs_unhash_obj(struct yaffs_obj *obj) -{ - int bucket; - struct yaffs_dev *dev = obj->my_dev; - - /* If it is still linked into the bucket list, free from the list */ - if (!list_empty(&obj->hash_link)) { - list_del_init(&obj->hash_link); - bucket = yaffs_hash_fn(obj->obj_id); - dev->obj_bucket[bucket].count--; - } -} - -/* FreeObject frees up a Object and puts it back on the free list */ -static void yaffs_free_obj(struct yaffs_obj *obj) -{ - struct yaffs_dev *dev; - - if (!obj) { - BUG(); - return; - } - dev = obj->my_dev; - yaffs_trace(YAFFS_TRACE_OS, "FreeObject %p inode %p", - obj, obj->my_inode); - if (obj->parent) - BUG(); - if (!list_empty(&obj->siblings)) - BUG(); - - if (obj->my_inode) { - /* We're still hooked up to a cached inode. - * Don't delete now, but mark for later deletion - */ - obj->defered_free = 1; - return; - } - - yaffs_unhash_obj(obj); - - yaffs_free_raw_obj(dev, obj); - dev->n_obj--; - dev->checkpoint_blocks_required = 0; /* force recalculation */ -} - -void yaffs_handle_defered_free(struct yaffs_obj *obj) -{ - if (obj->defered_free) - yaffs_free_obj(obj); -} - -static int yaffs_generic_obj_del(struct yaffs_obj *in) -{ - /* Iinvalidate the file's data in the cache, without flushing. */ - yaffs_invalidate_whole_cache(in); - - if (in->my_dev->param.is_yaffs2 && in->parent != in->my_dev->del_dir) { - /* Move to unlinked directory so we have a deletion record */ - yaffs_change_obj_name(in, in->my_dev->del_dir, _Y("deleted"), 0, - 0); - } - - yaffs_remove_obj_from_dir(in); - yaffs_chunk_del(in->my_dev, in->hdr_chunk, 1, __LINE__); - in->hdr_chunk = 0; - - yaffs_free_obj(in); - return YAFFS_OK; - -} - -static void yaffs_soft_del_file(struct yaffs_obj *obj) -{ - if (!obj->deleted || - obj->variant_type != YAFFS_OBJECT_TYPE_FILE || - obj->soft_del) - return; - - if (obj->n_data_chunks <= 0) { - /* Empty file with no duplicate object headers, - * just delete it immediately */ - yaffs_free_tnode(obj->my_dev, obj->variant.file_variant.top); - obj->variant.file_variant.top = NULL; - yaffs_trace(YAFFS_TRACE_TRACING, - "yaffs: Deleting empty file %d", - obj->obj_id); - yaffs_generic_obj_del(obj); - } else { - yaffs_soft_del_worker(obj, - obj->variant.file_variant.top, - obj->variant. - file_variant.top_level, 0); - obj->soft_del = 1; - } -} - -/* Pruning removes any part of the file structure tree that is beyond the - * bounds of the file (ie that does not point to chunks). - * - * A file should only get pruned when its size is reduced. - * - * Before pruning, the chunks must be pulled from the tree and the - * level 0 tnode entries must be zeroed out. - * Could also use this for file deletion, but that's probably better handled - * by a special case. - * - * This function is recursive. For levels > 0 the function is called again on - * any sub-tree. For level == 0 we just check if the sub-tree has data. - * If there is no data in a subtree then it is pruned. - */ - -static struct yaffs_tnode *yaffs_prune_worker(struct yaffs_dev *dev, - struct yaffs_tnode *tn, u32 level, - int del0) -{ - int i; - int has_data; - - if (!tn) - return tn; - - has_data = 0; - - if (level > 0) { - for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) { - if (tn->internal[i]) { - tn->internal[i] = - yaffs_prune_worker(dev, - tn->internal[i], - level - 1, - (i == 0) ? del0 : 1); - } - - if (tn->internal[i]) - has_data++; - } - } else { - int tnode_size_u32 = dev->tnode_size / sizeof(u32); - u32 *map = (u32 *) tn; - - for (i = 0; !has_data && i < tnode_size_u32; i++) { - if (map[i]) - has_data++; - } - } - - if (has_data == 0 && del0) { - /* Free and return NULL */ - yaffs_free_tnode(dev, tn); - tn = NULL; - } - return tn; -} - -static int yaffs_prune_tree(struct yaffs_dev *dev, - struct yaffs_file_var *file_struct) -{ - int i; - int has_data; - int done = 0; - struct yaffs_tnode *tn; - - if (file_struct->top_level < 1) - return YAFFS_OK; - - file_struct->top = - yaffs_prune_worker(dev, file_struct->top, file_struct->top_level, 0); - - /* Now we have a tree with all the non-zero branches NULL but - * the height is the same as it was. - * Let's see if we can trim internal tnodes to shorten the tree. - * We can do this if only the 0th element in the tnode is in use - * (ie all the non-zero are NULL) - */ - - while (file_struct->top_level && !done) { - tn = file_struct->top; - - has_data = 0; - for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { - if (tn->internal[i]) - has_data++; - } - - if (!has_data) { - file_struct->top = tn->internal[0]; - file_struct->top_level--; - yaffs_free_tnode(dev, tn); - } else { - done = 1; - } - } - - return YAFFS_OK; -} - -/*-------------------- End of File Structure functions.-------------------*/ - -/* alloc_empty_obj gets us a clean Object.*/ -static struct yaffs_obj *yaffs_alloc_empty_obj(struct yaffs_dev *dev) -{ - struct yaffs_obj *obj = yaffs_alloc_raw_obj(dev); - - if (!obj) - return obj; - - dev->n_obj++; - - /* Now sweeten it up... */ - - memset(obj, 0, sizeof(struct yaffs_obj)); - obj->being_created = 1; - - obj->my_dev = dev; - obj->hdr_chunk = 0; - obj->variant_type = YAFFS_OBJECT_TYPE_UNKNOWN; - INIT_LIST_HEAD(&(obj->hard_links)); - INIT_LIST_HEAD(&(obj->hash_link)); - INIT_LIST_HEAD(&obj->siblings); - - /* Now make the directory sane */ - if (dev->root_dir) { - obj->parent = dev->root_dir; - list_add(&(obj->siblings), - &dev->root_dir->variant.dir_variant.children); - } - - /* Add it to the lost and found directory. - * NB Can't put root or lost-n-found in lost-n-found so - * check if lost-n-found exists first - */ - if (dev->lost_n_found) - yaffs_add_obj_to_dir(dev->lost_n_found, obj); - - obj->being_created = 0; - - dev->checkpoint_blocks_required = 0; /* force recalculation */ - - return obj; -} - -static int yaffs_find_nice_bucket(struct yaffs_dev *dev) -{ - int i; - int l = 999; - int lowest = 999999; - - /* Search for the shortest list or one that - * isn't too long. - */ - - for (i = 0; i < 10 && lowest > 4; i++) { - dev->bucket_finder++; - dev->bucket_finder %= YAFFS_NOBJECT_BUCKETS; - if (dev->obj_bucket[dev->bucket_finder].count < lowest) { - lowest = dev->obj_bucket[dev->bucket_finder].count; - l = dev->bucket_finder; - } - } - - return l; -} - -static int yaffs_new_obj_id(struct yaffs_dev *dev) -{ - int bucket = yaffs_find_nice_bucket(dev); - int found = 0; - struct list_head *i; - u32 n = (u32) bucket; - - /* Now find an object value that has not already been taken - * by scanning the list. - */ - - while (!found) { - found = 1; - n += YAFFS_NOBJECT_BUCKETS; - list_for_each(i, &dev->obj_bucket[bucket].list) { - /* If there is already one in the list */ - if (list_entry(i, struct yaffs_obj, - hash_link)->obj_id == n) { - found = 0; - break; - } - } - } - return n; -} - -static void yaffs_hash_obj(struct yaffs_obj *in) -{ - int bucket = yaffs_hash_fn(in->obj_id); - struct yaffs_dev *dev = in->my_dev; - - list_add(&in->hash_link, &dev->obj_bucket[bucket].list); - dev->obj_bucket[bucket].count++; -} - -struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number) -{ - int bucket = yaffs_hash_fn(number); - struct list_head *i; - struct yaffs_obj *in; - - list_for_each(i, &dev->obj_bucket[bucket].list) { - /* Look if it is in the list */ - in = list_entry(i, struct yaffs_obj, hash_link); - if (in->obj_id == number) { - /* Don't show if it is defered free */ - if (in->defered_free) - return NULL; - return in; - } - } - - return NULL; -} - -struct yaffs_obj *yaffs_new_obj(struct yaffs_dev *dev, int number, - enum yaffs_obj_type type) -{ - struct yaffs_obj *the_obj = NULL; - struct yaffs_tnode *tn = NULL; - - if (number < 0) - number = yaffs_new_obj_id(dev); - - if (type == YAFFS_OBJECT_TYPE_FILE) { - tn = yaffs_get_tnode(dev); - if (!tn) - return NULL; - } - - the_obj = yaffs_alloc_empty_obj(dev); - if (!the_obj) { - if (tn) - yaffs_free_tnode(dev, tn); - return NULL; - } - - the_obj->fake = 0; - the_obj->rename_allowed = 1; - the_obj->unlink_allowed = 1; - the_obj->obj_id = number; - yaffs_hash_obj(the_obj); - the_obj->variant_type = type; - yaffs_load_current_time(the_obj, 1, 1); - - switch (type) { - case YAFFS_OBJECT_TYPE_FILE: - the_obj->variant.file_variant.file_size = 0; - the_obj->variant.file_variant.scanned_size = 0; - the_obj->variant.file_variant.shrink_size = - yaffs_max_file_size(dev); - the_obj->variant.file_variant.top_level = 0; - the_obj->variant.file_variant.top = tn; - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - INIT_LIST_HEAD(&the_obj->variant.dir_variant.children); - INIT_LIST_HEAD(&the_obj->variant.dir_variant.dirty); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - case YAFFS_OBJECT_TYPE_HARDLINK: - case YAFFS_OBJECT_TYPE_SPECIAL: - /* No action required */ - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* todo this should not happen */ - break; - } - return the_obj; -} - -static struct yaffs_obj *yaffs_create_fake_dir(struct yaffs_dev *dev, - int number, u32 mode) -{ - - struct yaffs_obj *obj = - yaffs_new_obj(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY); - - if (!obj) - return NULL; - - obj->fake = 1; /* it is fake so it might not use NAND */ - obj->rename_allowed = 0; - obj->unlink_allowed = 0; - obj->deleted = 0; - obj->unlinked = 0; - obj->yst_mode = mode; - obj->my_dev = dev; - obj->hdr_chunk = 0; /* Not a valid chunk. */ - return obj; - -} - -static void yaffs_init_tnodes_and_objs(struct yaffs_dev *dev) -{ - int i; - - dev->n_obj = 0; - dev->n_tnodes = 0; - yaffs_init_raw_tnodes_and_objs(dev); - - for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { - INIT_LIST_HEAD(&dev->obj_bucket[i].list); - dev->obj_bucket[i].count = 0; - } -} - -struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev, - int number, - enum yaffs_obj_type type) -{ - struct yaffs_obj *the_obj = NULL; - - if (number > 0) - the_obj = yaffs_find_by_number(dev, number); - - if (!the_obj) - the_obj = yaffs_new_obj(dev, number, type); - - return the_obj; - -} - -YCHAR *yaffs_clone_str(const YCHAR *str) -{ - YCHAR *new_str = NULL; - int len; - - if (!str) - str = _Y(""); - - len = yaffs_strnlen(str, YAFFS_MAX_ALIAS_LENGTH); - new_str = kmalloc((len + 1) * sizeof(YCHAR), GFP_NOFS); - if (new_str) { - yaffs_strncpy(new_str, str, len); - new_str[len] = 0; - } - return new_str; - -} -/* - *yaffs_update_parent() handles fixing a directories mtime and ctime when a new - * link (ie. name) is created or deleted in the directory. - * - * ie. - * create dir/a : update dir's mtime/ctime - * rm dir/a: update dir's mtime/ctime - * modify dir/a: don't update dir's mtimme/ctime - * - * This can be handled immediately or defered. Defering helps reduce the number - * of updates when many files in a directory are changed within a brief period. - * - * If the directory updating is defered then yaffs_update_dirty_dirs must be - * called periodically. - */ - -static void yaffs_update_parent(struct yaffs_obj *obj) -{ - struct yaffs_dev *dev; - - if (!obj) - return; - dev = obj->my_dev; - obj->dirty = 1; - yaffs_load_current_time(obj, 0, 1); - if (dev->param.defered_dir_update) { - struct list_head *link = &obj->variant.dir_variant.dirty; - - if (list_empty(link)) { - list_add(link, &dev->dirty_dirs); - yaffs_trace(YAFFS_TRACE_BACKGROUND, - "Added object %d to dirty directories", - obj->obj_id); - } - - } else { - yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); - } -} - -void yaffs_update_dirty_dirs(struct yaffs_dev *dev) -{ - struct list_head *link; - struct yaffs_obj *obj; - struct yaffs_dir_var *d_s; - union yaffs_obj_var *o_v; - - yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update dirty directories"); - - while (!list_empty(&dev->dirty_dirs)) { - link = dev->dirty_dirs.next; - list_del_init(link); - - d_s = list_entry(link, struct yaffs_dir_var, dirty); - o_v = list_entry(d_s, union yaffs_obj_var, dir_variant); - obj = list_entry(o_v, struct yaffs_obj, variant); - - yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update directory %d", - obj->obj_id); - - if (obj->dirty) - yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); - } -} - -/* - * Mknod (create) a new object. - * equiv_obj only has meaning for a hard link; - * alias_str only has meaning for a symlink. - * rdev only has meaning for devices (a subset of special objects) - */ - -static struct yaffs_obj *yaffs_create_obj(enum yaffs_obj_type type, - struct yaffs_obj *parent, - const YCHAR *name, - u32 mode, - u32 uid, - u32 gid, - struct yaffs_obj *equiv_obj, - const YCHAR *alias_str, u32 rdev) -{ - struct yaffs_obj *in; - YCHAR *str = NULL; - struct yaffs_dev *dev = parent->my_dev; - - /* Check if the entry exists. - * If it does then fail the call since we don't want a dup. */ - if (yaffs_find_by_name(parent, name)) - return NULL; - - if (type == YAFFS_OBJECT_TYPE_SYMLINK) { - str = yaffs_clone_str(alias_str); - if (!str) - return NULL; - } - - in = yaffs_new_obj(dev, -1, type); - - if (!in) { - kfree(str); - return NULL; - } - - in->hdr_chunk = 0; - in->valid = 1; - in->variant_type = type; - - in->yst_mode = mode; - - yaffs_attribs_init(in, gid, uid, rdev); - - in->n_data_chunks = 0; - - yaffs_set_obj_name(in, name); - in->dirty = 1; - - yaffs_add_obj_to_dir(parent, in); - - in->my_dev = parent->my_dev; - - switch (type) { - case YAFFS_OBJECT_TYPE_SYMLINK: - in->variant.symlink_variant.alias = str; - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - in->variant.hardlink_variant.equiv_obj = equiv_obj; - in->variant.hardlink_variant.equiv_id = equiv_obj->obj_id; - list_add(&in->hard_links, &equiv_obj->hard_links); - break; - case YAFFS_OBJECT_TYPE_FILE: - case YAFFS_OBJECT_TYPE_DIRECTORY: - case YAFFS_OBJECT_TYPE_SPECIAL: - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* do nothing */ - break; - } - - if (yaffs_update_oh(in, name, 0, 0, 0, NULL) < 0) { - /* Could not create the object header, fail */ - yaffs_del_obj(in); - in = NULL; - } - - if (in) - yaffs_update_parent(parent); - - return in; -} - -struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent, - const YCHAR *name, u32 mode, u32 uid, - u32 gid) -{ - return yaffs_create_obj(YAFFS_OBJECT_TYPE_FILE, parent, name, mode, - uid, gid, NULL, NULL, 0); -} - -struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR *name, - u32 mode, u32 uid, u32 gid) -{ - return yaffs_create_obj(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name, - mode, uid, gid, NULL, NULL, 0); -} - -struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent, - const YCHAR *name, u32 mode, u32 uid, - u32 gid, u32 rdev) -{ - return yaffs_create_obj(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode, - uid, gid, NULL, NULL, rdev); -} - -struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent, - const YCHAR *name, u32 mode, u32 uid, - u32 gid, const YCHAR *alias) -{ - return yaffs_create_obj(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode, - uid, gid, NULL, alias, 0); -} - -/* yaffs_link_obj returns the object id of the equivalent object.*/ -struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR * name, - struct yaffs_obj *equiv_obj) -{ - /* Get the real object in case we were fed a hard link obj */ - equiv_obj = yaffs_get_equivalent_obj(equiv_obj); - - if (yaffs_create_obj(YAFFS_OBJECT_TYPE_HARDLINK, - parent, name, 0, 0, 0, - equiv_obj, NULL, 0)) - return equiv_obj; - - return NULL; - -} - -/*---------------------- Block Management and Page Allocation -------------*/ - -static void yaffs_deinit_blocks(struct yaffs_dev *dev) -{ - if (dev->block_info_alt && dev->block_info) - vfree(dev->block_info); - else - kfree(dev->block_info); - - dev->block_info_alt = 0; - - dev->block_info = NULL; - - if (dev->chunk_bits_alt && dev->chunk_bits) - vfree(dev->chunk_bits); - else - kfree(dev->chunk_bits); - dev->chunk_bits_alt = 0; - dev->chunk_bits = NULL; -} - -static int yaffs_init_blocks(struct yaffs_dev *dev) -{ - int n_blocks = dev->internal_end_block - dev->internal_start_block + 1; - - dev->block_info = NULL; - dev->chunk_bits = NULL; - dev->alloc_block = -1; /* force it to get a new one */ - - /* If the first allocation strategy fails, thry the alternate one */ - dev->block_info = - kmalloc(n_blocks * sizeof(struct yaffs_block_info), GFP_NOFS); - if (!dev->block_info) { - dev->block_info = - vmalloc(n_blocks * sizeof(struct yaffs_block_info)); - dev->block_info_alt = 1; - } else { - dev->block_info_alt = 0; - } - - if (!dev->block_info) - goto alloc_error; - - /* Set up dynamic blockinfo stuff. Round up bytes. */ - dev->chunk_bit_stride = (dev->param.chunks_per_block + 7) / 8; - dev->chunk_bits = - kmalloc(dev->chunk_bit_stride * n_blocks, GFP_NOFS); - if (!dev->chunk_bits) { - dev->chunk_bits = - vmalloc(dev->chunk_bit_stride * n_blocks); - dev->chunk_bits_alt = 1; - } else { - dev->chunk_bits_alt = 0; - } - if (!dev->chunk_bits) - goto alloc_error; - - memset(dev->block_info, 0, n_blocks * sizeof(struct yaffs_block_info)); - memset(dev->chunk_bits, 0, dev->chunk_bit_stride * n_blocks); - return YAFFS_OK; - -alloc_error: - yaffs_deinit_blocks(dev); - return YAFFS_FAIL; -} - -void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no) -{ - struct yaffs_block_info *bi = yaffs_get_block_info(dev, block_no); - int erased_ok = 0; - int i; - - /* If the block is still healthy erase it and mark as clean. - * If the block has had a data failure, then retire it. - */ - - yaffs_trace(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE, - "yaffs_block_became_dirty block %d state %d %s", - block_no, bi->block_state, - (bi->needs_retiring) ? "needs retiring" : ""); - - yaffs2_clear_oldest_dirty_seq(dev, bi); - - bi->block_state = YAFFS_BLOCK_STATE_DIRTY; - - /* If this is the block being garbage collected then stop gc'ing */ - if (block_no == dev->gc_block) - dev->gc_block = 0; - - /* If this block is currently the best candidate for gc - * then drop as a candidate */ - if (block_no == dev->gc_dirtiest) { - dev->gc_dirtiest = 0; - dev->gc_pages_in_use = 0; - } - - if (!bi->needs_retiring) { - yaffs2_checkpt_invalidate(dev); - erased_ok = yaffs_erase_block(dev, block_no); - if (!erased_ok) { - dev->n_erase_failures++; - yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - "**>> Erasure failed %d", block_no); - } - } - - /* Verify erasure if needed */ - if (erased_ok && - ((yaffs_trace_mask & YAFFS_TRACE_ERASE) || - !yaffs_skip_verification(dev))) { - for (i = 0; i < dev->param.chunks_per_block; i++) { - if (!yaffs_check_chunk_erased(dev, - block_no * dev->param.chunks_per_block + i)) { - yaffs_trace(YAFFS_TRACE_ERROR, - ">>Block %d erasure supposedly OK, but chunk %d not erased", - block_no, i); - } - } - } - - if (!erased_ok) { - /* We lost a block of free space */ - dev->n_free_chunks -= dev->param.chunks_per_block; - yaffs_retire_block(dev, block_no); - yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - "**>> Block %d retired", block_no); - return; - } - - /* Clean it up... */ - bi->block_state = YAFFS_BLOCK_STATE_EMPTY; - bi->seq_number = 0; - dev->n_erased_blocks++; - bi->pages_in_use = 0; - bi->soft_del_pages = 0; - bi->has_shrink_hdr = 0; - bi->skip_erased_check = 1; /* Clean, so no need to check */ - bi->gc_prioritise = 0; - bi->has_summary = 0; - - yaffs_clear_chunk_bits(dev, block_no); - - yaffs_trace(YAFFS_TRACE_ERASE, "Erased block %d", block_no); -} - -static inline int yaffs_gc_process_chunk(struct yaffs_dev *dev, - struct yaffs_block_info *bi, - int old_chunk, u8 *buffer) -{ - int new_chunk; - int mark_flash = 1; - struct yaffs_ext_tags tags; - struct yaffs_obj *object; - int matching_chunk; - int ret_val = YAFFS_OK; - - memset(&tags, 0, sizeof(tags)); - yaffs_rd_chunk_tags_nand(dev, old_chunk, - buffer, &tags); - object = yaffs_find_by_number(dev, tags.obj_id); - - yaffs_trace(YAFFS_TRACE_GC_DETAIL, - "Collecting chunk in block %d, %d %d %d ", - dev->gc_chunk, tags.obj_id, - tags.chunk_id, tags.n_bytes); - - if (object && !yaffs_skip_verification(dev)) { - if (tags.chunk_id == 0) - matching_chunk = - object->hdr_chunk; - else if (object->soft_del) - /* Defeat the test */ - matching_chunk = old_chunk; - else - matching_chunk = - yaffs_find_chunk_in_file - (object, tags.chunk_id, - NULL); - - if (old_chunk != matching_chunk) - yaffs_trace(YAFFS_TRACE_ERROR, - "gc: page in gc mismatch: %d %d %d %d", - old_chunk, - matching_chunk, - tags.obj_id, - tags.chunk_id); - } - - if (!object) { - yaffs_trace(YAFFS_TRACE_ERROR, - "page %d in gc has no object: %d %d %d ", - old_chunk, - tags.obj_id, tags.chunk_id, - tags.n_bytes); - } - - if (object && - object->deleted && - object->soft_del && tags.chunk_id != 0) { - /* Data chunk in a soft deleted file, - * throw it away. - * It's a soft deleted data chunk, - * No need to copy this, just forget - * about it and fix up the object. - */ - - /* Free chunks already includes - * softdeleted chunks, how ever this - * chunk is going to soon be really - * deleted which will increment free - * chunks. We have to decrement free - * chunks so this works out properly. - */ - dev->n_free_chunks--; - bi->soft_del_pages--; - - object->n_data_chunks--; - if (object->n_data_chunks <= 0) { - /* remeber to clean up obj */ - dev->gc_cleanup_list[dev->n_clean_ups] = tags.obj_id; - dev->n_clean_ups++; - } - mark_flash = 0; - } else if (object) { - /* It's either a data chunk in a live - * file or an ObjectHeader, so we're - * interested in it. - * NB Need to keep the ObjectHeaders of - * deleted files until the whole file - * has been deleted off - */ - tags.serial_number++; - dev->n_gc_copies++; - - if (tags.chunk_id == 0) { - /* It is an object Id, - * We need to nuke the - * shrinkheader flags since its - * work is done. - * Also need to clean up - * shadowing. - */ - struct yaffs_obj_hdr *oh; - oh = (struct yaffs_obj_hdr *) buffer; - - oh->is_shrink = 0; - tags.extra_is_shrink = 0; - oh->shadows_obj = 0; - oh->inband_shadowed_obj_id = 0; - tags.extra_shadows = 0; - - /* Update file size */ - if (object->variant_type == YAFFS_OBJECT_TYPE_FILE) { - yaffs_oh_size_load(oh, - object->variant.file_variant.file_size); - tags.extra_file_size = - object->variant.file_variant.file_size; - } - - yaffs_verify_oh(object, oh, &tags, 1); - new_chunk = - yaffs_write_new_chunk(dev, (u8 *) oh, &tags, 1); - } else { - new_chunk = - yaffs_write_new_chunk(dev, buffer, &tags, 1); - } - - if (new_chunk < 0) { - ret_val = YAFFS_FAIL; - } else { - - /* Now fix up the Tnodes etc. */ - - if (tags.chunk_id == 0) { - /* It's a header */ - object->hdr_chunk = new_chunk; - object->serial = tags.serial_number; - } else { - /* It's a data chunk */ - yaffs_put_chunk_in_file(object, tags.chunk_id, - new_chunk, 0); - } - } - } - if (ret_val == YAFFS_OK) - yaffs_chunk_del(dev, old_chunk, mark_flash, __LINE__); - return ret_val; -} - -static int yaffs_gc_block(struct yaffs_dev *dev, int block, int whole_block) -{ - int old_chunk; - int ret_val = YAFFS_OK; - int i; - int is_checkpt_block; - int max_copies; - int chunks_before = yaffs_get_erased_chunks(dev); - int chunks_after; - struct yaffs_block_info *bi = yaffs_get_block_info(dev, block); - - is_checkpt_block = (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT); - - yaffs_trace(YAFFS_TRACE_TRACING, - "Collecting block %d, in use %d, shrink %d, whole_block %d", - block, bi->pages_in_use, bi->has_shrink_hdr, - whole_block); - - /*yaffs_verify_free_chunks(dev); */ - - if (bi->block_state == YAFFS_BLOCK_STATE_FULL) - bi->block_state = YAFFS_BLOCK_STATE_COLLECTING; - - bi->has_shrink_hdr = 0; /* clear the flag so that the block can erase */ - - dev->gc_disable = 1; - - yaffs_summary_gc(dev, block); - - if (is_checkpt_block || !yaffs_still_some_chunks(dev, block)) { - yaffs_trace(YAFFS_TRACE_TRACING, - "Collecting block %d that has no chunks in use", - block); - yaffs_block_became_dirty(dev, block); - } else { - - u8 *buffer = yaffs_get_temp_buffer(dev); - - yaffs_verify_blk(dev, bi, block); - - max_copies = (whole_block) ? dev->param.chunks_per_block : 5; - old_chunk = block * dev->param.chunks_per_block + dev->gc_chunk; - - for (/* init already done */ ; - ret_val == YAFFS_OK && - dev->gc_chunk < dev->param.chunks_per_block && - (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) && - max_copies > 0; - dev->gc_chunk++, old_chunk++) { - if (yaffs_check_chunk_bit(dev, block, dev->gc_chunk)) { - /* Page is in use and might need to be copied */ - max_copies--; - ret_val = yaffs_gc_process_chunk(dev, bi, - old_chunk, buffer); - } - } - yaffs_release_temp_buffer(dev, buffer); - } - - yaffs_verify_collected_blk(dev, bi, block); - - if (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) { - /* - * The gc did not complete. Set block state back to FULL - * because checkpointing does not restore gc. - */ - bi->block_state = YAFFS_BLOCK_STATE_FULL; - } else { - /* The gc completed. */ - /* Do any required cleanups */ - for (i = 0; i < dev->n_clean_ups; i++) { - /* Time to delete the file too */ - struct yaffs_obj *object = - yaffs_find_by_number(dev, dev->gc_cleanup_list[i]); - if (object) { - yaffs_free_tnode(dev, - object->variant.file_variant.top); - object->variant.file_variant.top = NULL; - yaffs_trace(YAFFS_TRACE_GC, - "yaffs: About to finally delete object %d", - object->obj_id); - yaffs_generic_obj_del(object); - object->my_dev->n_deleted_files--; - } - - } - chunks_after = yaffs_get_erased_chunks(dev); - if (chunks_before >= chunks_after) - yaffs_trace(YAFFS_TRACE_GC, - "gc did not increase free chunks before %d after %d", - chunks_before, chunks_after); - dev->gc_block = 0; - dev->gc_chunk = 0; - dev->n_clean_ups = 0; - } - - dev->gc_disable = 0; - - return ret_val; -} - -/* - * find_gc_block() selects the dirtiest block (or close enough) - * for garbage collection. - */ - -static unsigned yaffs_find_gc_block(struct yaffs_dev *dev, - int aggressive, int background) -{ - int i; - int iterations; - unsigned selected = 0; - int prioritised = 0; - int prioritised_exist = 0; - struct yaffs_block_info *bi; - int threshold; - - /* First let's see if we need to grab a prioritised block */ - if (dev->has_pending_prioritised_gc && !aggressive) { - dev->gc_dirtiest = 0; - bi = dev->block_info; - for (i = dev->internal_start_block; - i <= dev->internal_end_block && !selected; i++) { - - if (bi->gc_prioritise) { - prioritised_exist = 1; - if (bi->block_state == YAFFS_BLOCK_STATE_FULL && - yaffs_block_ok_for_gc(dev, bi)) { - selected = i; - prioritised = 1; - } - } - bi++; - } - - /* - * If there is a prioritised block and none was selected then - * this happened because there is at least one old dirty block - * gumming up the works. Let's gc the oldest dirty block. - */ - - if (prioritised_exist && - !selected && dev->oldest_dirty_block > 0) - selected = dev->oldest_dirty_block; - - if (!prioritised_exist) /* None found, so we can clear this */ - dev->has_pending_prioritised_gc = 0; - } - - /* If we're doing aggressive GC then we are happy to take a less-dirty - * block, and search harder. - * else (leasurely gc), then we only bother to do this if the - * block has only a few pages in use. - */ - - if (!selected) { - int pages_used; - int n_blocks = - dev->internal_end_block - dev->internal_start_block + 1; - if (aggressive) { - threshold = dev->param.chunks_per_block; - iterations = n_blocks; - } else { - int max_threshold; - - if (background) - max_threshold = dev->param.chunks_per_block / 2; - else - max_threshold = dev->param.chunks_per_block / 8; - - if (max_threshold < YAFFS_GC_PASSIVE_THRESHOLD) - max_threshold = YAFFS_GC_PASSIVE_THRESHOLD; - - threshold = background ? (dev->gc_not_done + 2) * 2 : 0; - if (threshold < YAFFS_GC_PASSIVE_THRESHOLD) - threshold = YAFFS_GC_PASSIVE_THRESHOLD; - if (threshold > max_threshold) - threshold = max_threshold; - - iterations = n_blocks / 16 + 1; - if (iterations > 100) - iterations = 100; - } - - for (i = 0; - i < iterations && - (dev->gc_dirtiest < 1 || - dev->gc_pages_in_use > YAFFS_GC_GOOD_ENOUGH); - i++) { - dev->gc_block_finder++; - if (dev->gc_block_finder < dev->internal_start_block || - dev->gc_block_finder > dev->internal_end_block) - dev->gc_block_finder = - dev->internal_start_block; - - bi = yaffs_get_block_info(dev, dev->gc_block_finder); - - pages_used = bi->pages_in_use - bi->soft_del_pages; - - if (bi->block_state == YAFFS_BLOCK_STATE_FULL && - pages_used < dev->param.chunks_per_block && - (dev->gc_dirtiest < 1 || - pages_used < dev->gc_pages_in_use) && - yaffs_block_ok_for_gc(dev, bi)) { - dev->gc_dirtiest = dev->gc_block_finder; - dev->gc_pages_in_use = pages_used; - } - } - - if (dev->gc_dirtiest > 0 && dev->gc_pages_in_use <= threshold) - selected = dev->gc_dirtiest; - } - - /* - * If nothing has been selected for a while, try the oldest dirty - * because that's gumming up the works. - */ - - if (!selected && dev->param.is_yaffs2 && - dev->gc_not_done >= (background ? 10 : 20)) { - yaffs2_find_oldest_dirty_seq(dev); - if (dev->oldest_dirty_block > 0) { - selected = dev->oldest_dirty_block; - dev->gc_dirtiest = selected; - dev->oldest_dirty_gc_count++; - bi = yaffs_get_block_info(dev, selected); - dev->gc_pages_in_use = - bi->pages_in_use - bi->soft_del_pages; - } else { - dev->gc_not_done = 0; - } - } - - if (selected) { - yaffs_trace(YAFFS_TRACE_GC, - "GC Selected block %d with %d free, prioritised:%d", - selected, - dev->param.chunks_per_block - dev->gc_pages_in_use, - prioritised); - - dev->n_gc_blocks++; - if (background) - dev->bg_gcs++; - - dev->gc_dirtiest = 0; - dev->gc_pages_in_use = 0; - dev->gc_not_done = 0; - if (dev->refresh_skip > 0) - dev->refresh_skip--; - } else { - dev->gc_not_done++; - yaffs_trace(YAFFS_TRACE_GC, - "GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s", - dev->gc_block_finder, dev->gc_not_done, threshold, - dev->gc_dirtiest, dev->gc_pages_in_use, - dev->oldest_dirty_block, background ? " bg" : ""); - } - - return selected; -} - -/* New garbage collector - * If we're very low on erased blocks then we do aggressive garbage collection - * otherwise we do "leasurely" garbage collection. - * Aggressive gc looks further (whole array) and will accept less dirty blocks. - * Passive gc only inspects smaller areas and only accepts more dirty blocks. - * - * The idea is to help clear out space in a more spread-out manner. - * Dunno if it really does anything useful. - */ -static int yaffs_check_gc(struct yaffs_dev *dev, int background) -{ - int aggressive = 0; - int gc_ok = YAFFS_OK; - int max_tries = 0; - int min_erased; - int erased_chunks; - int checkpt_block_adjust; - - if (dev->param.gc_control && (dev->param.gc_control(dev) & 1) == 0) - return YAFFS_OK; - - if (dev->gc_disable) - /* Bail out so we don't get recursive gc */ - return YAFFS_OK; - - /* This loop should pass the first time. - * Only loops here if the collection does not increase space. - */ - - do { - max_tries++; - - checkpt_block_adjust = yaffs_calc_checkpt_blocks_required(dev); - - min_erased = - dev->param.n_reserved_blocks + checkpt_block_adjust + 1; - erased_chunks = - dev->n_erased_blocks * dev->param.chunks_per_block; - - /* If we need a block soon then do aggressive gc. */ - if (dev->n_erased_blocks < min_erased) - aggressive = 1; - else { - if (!background - && erased_chunks > (dev->n_free_chunks / 4)) - break; - - if (dev->gc_skip > 20) - dev->gc_skip = 20; - if (erased_chunks < dev->n_free_chunks / 2 || - dev->gc_skip < 1 || background) - aggressive = 0; - else { - dev->gc_skip--; - break; - } - } - - dev->gc_skip = 5; - - /* If we don't already have a block being gc'd then see if we - * should start another */ - - if (dev->gc_block < 1 && !aggressive) { - dev->gc_block = yaffs2_find_refresh_block(dev); - dev->gc_chunk = 0; - dev->n_clean_ups = 0; - } - if (dev->gc_block < 1) { - dev->gc_block = - yaffs_find_gc_block(dev, aggressive, background); - dev->gc_chunk = 0; - dev->n_clean_ups = 0; - } - - if (dev->gc_block > 0) { - dev->all_gcs++; - if (!aggressive) - dev->passive_gc_count++; - - yaffs_trace(YAFFS_TRACE_GC, - "yaffs: GC n_erased_blocks %d aggressive %d", - dev->n_erased_blocks, aggressive); - - gc_ok = yaffs_gc_block(dev, dev->gc_block, aggressive); - } - - if (dev->n_erased_blocks < (dev->param.n_reserved_blocks) && - dev->gc_block > 0) { - yaffs_trace(YAFFS_TRACE_GC, - "yaffs: GC !!!no reclaim!!! n_erased_blocks %d after try %d block %d", - dev->n_erased_blocks, max_tries, - dev->gc_block); - } - } while ((dev->n_erased_blocks < dev->param.n_reserved_blocks) && - (dev->gc_block > 0) && (max_tries < 2)); - - return aggressive ? gc_ok : YAFFS_OK; -} - -/* - * yaffs_bg_gc() - * Garbage collects. Intended to be called from a background thread. - * Returns non-zero if at least half the free chunks are erased. - */ -int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency) -{ - int erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block; - - yaffs_trace(YAFFS_TRACE_BACKGROUND, "Background gc %u", urgency); - - yaffs_check_gc(dev, 1); - return erased_chunks > dev->n_free_chunks / 2; -} - -/*-------------------- Data file manipulation -----------------*/ - -static int yaffs_rd_data_obj(struct yaffs_obj *in, int inode_chunk, u8 * buffer) -{ - int nand_chunk = yaffs_find_chunk_in_file(in, inode_chunk, NULL); - - if (nand_chunk >= 0) - return yaffs_rd_chunk_tags_nand(in->my_dev, nand_chunk, - buffer, NULL); - else { - yaffs_trace(YAFFS_TRACE_NANDACCESS, - "Chunk %d not found zero instead", - nand_chunk); - /* get sane (zero) data if you read a hole */ - memset(buffer, 0, in->my_dev->data_bytes_per_chunk); - return 0; - } - -} - -void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash, - int lyn) -{ - int block; - int page; - struct yaffs_ext_tags tags; - struct yaffs_block_info *bi; - - if (chunk_id <= 0) - return; - - dev->n_deletions++; - block = chunk_id / dev->param.chunks_per_block; - page = chunk_id % dev->param.chunks_per_block; - - if (!yaffs_check_chunk_bit(dev, block, page)) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Deleting invalid chunk %d", chunk_id); - - bi = yaffs_get_block_info(dev, block); - - yaffs2_update_oldest_dirty_seq(dev, block, bi); - - yaffs_trace(YAFFS_TRACE_DELETION, - "line %d delete of chunk %d", - lyn, chunk_id); - - if (!dev->param.is_yaffs2 && mark_flash && - bi->block_state != YAFFS_BLOCK_STATE_COLLECTING) { - - memset(&tags, 0, sizeof(tags)); - tags.is_deleted = 1; - yaffs_wr_chunk_tags_nand(dev, chunk_id, NULL, &tags); - yaffs_handle_chunk_update(dev, chunk_id, &tags); - } else { - dev->n_unmarked_deletions++; - } - - /* Pull out of the management area. - * If the whole block became dirty, this will kick off an erasure. - */ - if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING || - bi->block_state == YAFFS_BLOCK_STATE_FULL || - bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN || - bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) { - dev->n_free_chunks++; - yaffs_clear_chunk_bit(dev, block, page); - bi->pages_in_use--; - - if (bi->pages_in_use == 0 && - !bi->has_shrink_hdr && - bi->block_state != YAFFS_BLOCK_STATE_ALLOCATING && - bi->block_state != YAFFS_BLOCK_STATE_NEEDS_SCAN) { - yaffs_block_became_dirty(dev, block); - } - } -} - -static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk, - const u8 *buffer, int n_bytes, int use_reserve) -{ - /* Find old chunk Need to do this to get serial number - * Write new one and patch into tree. - * Invalidate old tags. - */ - - int prev_chunk_id; - struct yaffs_ext_tags prev_tags; - int new_chunk_id; - struct yaffs_ext_tags new_tags; - struct yaffs_dev *dev = in->my_dev; - - yaffs_check_gc(dev, 0); - - /* Get the previous chunk at this location in the file if it exists. - * If it does not exist then put a zero into the tree. This creates - * the tnode now, rather than later when it is harder to clean up. - */ - prev_chunk_id = yaffs_find_chunk_in_file(in, inode_chunk, &prev_tags); - if (prev_chunk_id < 1 && - !yaffs_put_chunk_in_file(in, inode_chunk, 0, 0)) - return 0; - - /* Set up new tags */ - memset(&new_tags, 0, sizeof(new_tags)); - - new_tags.chunk_id = inode_chunk; - new_tags.obj_id = in->obj_id; - new_tags.serial_number = - (prev_chunk_id > 0) ? prev_tags.serial_number + 1 : 1; - new_tags.n_bytes = n_bytes; - - if (n_bytes < 1 || n_bytes > dev->param.total_bytes_per_chunk) { - yaffs_trace(YAFFS_TRACE_ERROR, - "Writing %d bytes to chunk!!!!!!!!!", - n_bytes); - BUG(); - } - - new_chunk_id = - yaffs_write_new_chunk(dev, buffer, &new_tags, use_reserve); - - if (new_chunk_id > 0) { - yaffs_put_chunk_in_file(in, inode_chunk, new_chunk_id, 0); - - if (prev_chunk_id > 0) - yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__); - - yaffs_verify_file_sane(in); - } - return new_chunk_id; - -} - -static int yaffs_do_xattrib_mod(struct yaffs_obj *obj, int set, - const YCHAR *name, const void *value, int size, - int flags) -{ - struct yaffs_xattr_mod xmod; - int result; - - xmod.set = set; - xmod.name = name; - xmod.data = value; - xmod.size = size; - xmod.flags = flags; - xmod.result = -ENOSPC; - - result = yaffs_update_oh(obj, NULL, 0, 0, 0, &xmod); - - if (result > 0) - return xmod.result; - else - return -ENOSPC; -} - -static int yaffs_apply_xattrib_mod(struct yaffs_obj *obj, char *buffer, - struct yaffs_xattr_mod *xmod) -{ - int retval = 0; - int x_offs = sizeof(struct yaffs_obj_hdr); - struct yaffs_dev *dev = obj->my_dev; - int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr); - char *x_buffer = buffer + x_offs; - - if (xmod->set) - retval = - nval_set(x_buffer, x_size, xmod->name, xmod->data, - xmod->size, xmod->flags); - else - retval = nval_del(x_buffer, x_size, xmod->name); - - obj->has_xattr = nval_hasvalues(x_buffer, x_size); - obj->xattr_known = 1; - xmod->result = retval; - - return retval; -} - -static int yaffs_do_xattrib_fetch(struct yaffs_obj *obj, const YCHAR *name, - void *value, int size) -{ - char *buffer = NULL; - int result; - struct yaffs_ext_tags tags; - struct yaffs_dev *dev = obj->my_dev; - int x_offs = sizeof(struct yaffs_obj_hdr); - int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr); - char *x_buffer; - int retval = 0; - - if (obj->hdr_chunk < 1) - return -ENODATA; - - /* If we know that the object has no xattribs then don't do all the - * reading and parsing. - */ - if (obj->xattr_known && !obj->has_xattr) { - if (name) - return -ENODATA; - else - return 0; - } - - buffer = (char *)yaffs_get_temp_buffer(dev); - if (!buffer) - return -ENOMEM; - - result = - yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, (u8 *) buffer, &tags); - - if (result != YAFFS_OK) - retval = -ENOENT; - else { - x_buffer = buffer + x_offs; - - if (!obj->xattr_known) { - obj->has_xattr = nval_hasvalues(x_buffer, x_size); - obj->xattr_known = 1; - } - - if (name) - retval = nval_get(x_buffer, x_size, name, value, size); - else - retval = nval_list(x_buffer, x_size, value, size); - } - yaffs_release_temp_buffer(dev, (u8 *) buffer); - return retval; -} - -int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR * name, - const void *value, int size, int flags) -{ - return yaffs_do_xattrib_mod(obj, 1, name, value, size, flags); -} - -int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name) -{ - return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 0); -} - -int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR * name, void *value, - int size) -{ - return yaffs_do_xattrib_fetch(obj, name, value, size); -} - -int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size) -{ - return yaffs_do_xattrib_fetch(obj, NULL, buffer, size); -} - -static void yaffs_check_obj_details_loaded(struct yaffs_obj *in) -{ - u8 *buf; - struct yaffs_obj_hdr *oh; - struct yaffs_dev *dev; - struct yaffs_ext_tags tags; - - if (!in || !in->lazy_loaded || in->hdr_chunk < 1) - return; - - dev = in->my_dev; - in->lazy_loaded = 0; - buf = yaffs_get_temp_buffer(dev); - - yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, buf, &tags); - oh = (struct yaffs_obj_hdr *)buf; - - in->yst_mode = oh->yst_mode; - yaffs_load_attribs(in, oh); - yaffs_set_obj_name_from_oh(in, oh); - - if (in->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) { - in->variant.symlink_variant.alias = - yaffs_clone_str(oh->alias); - } - yaffs_release_temp_buffer(dev, buf); -} - -static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR *name, - const YCHAR *oh_name, int buff_size) -{ -#ifdef CONFIG_YAFFS_AUTO_UNICODE - if (dev->param.auto_unicode) { - if (*oh_name) { - /* It is an ASCII name, do an ASCII to - * unicode conversion */ - const char *ascii_oh_name = (const char *)oh_name; - int n = buff_size - 1; - while (n > 0 && *ascii_oh_name) { - *name = *ascii_oh_name; - name++; - ascii_oh_name++; - n--; - } - } else { - yaffs_strncpy(name, oh_name + 1, buff_size - 1); - } - - return; - } -#endif - - yaffs_strncpy(name, oh_name, buff_size - 1); -} - -static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR *oh_name, - const YCHAR *name) -{ -#ifdef CONFIG_YAFFS_AUTO_UNICODE - int is_ascii; - YCHAR *w; - - if (dev->param.auto_unicode) { - - is_ascii = 1; - w = name; - - /* Figure out if the name will fit in ascii character set */ - while (is_ascii && *w) { - if ((*w) & 0xff00) - is_ascii = 0; - w++; - } - - if (is_ascii) { - /* It is an ASCII name, so convert unicode to ascii */ - char *ascii_oh_name = (char *)oh_name; - int n = YAFFS_MAX_NAME_LENGTH - 1; - while (n > 0 && *name) { - *ascii_oh_name = *name; - name++; - ascii_oh_name++; - n--; - } - } else { - /* Unicode name, so save starting at the second YCHAR */ - *oh_name = 0; - yaffs_strncpy(oh_name + 1, name, YAFFS_MAX_NAME_LENGTH - 2); - } - - return; - } -#endif - - yaffs_strncpy(oh_name, name, YAFFS_MAX_NAME_LENGTH - 1); -} - -/* UpdateObjectHeader updates the header on NAND for an object. - * If name is not NULL, then that new name is used. - */ -int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name, int force, - int is_shrink, int shadows, struct yaffs_xattr_mod *xmod) -{ - - struct yaffs_block_info *bi; - struct yaffs_dev *dev = in->my_dev; - int prev_chunk_id; - int ret_val = 0; - int new_chunk_id; - struct yaffs_ext_tags new_tags; - struct yaffs_ext_tags old_tags; - const YCHAR *alias = NULL; - u8 *buffer = NULL; - YCHAR old_name[YAFFS_MAX_NAME_LENGTH + 1]; - struct yaffs_obj_hdr *oh = NULL; - loff_t file_size = 0; - - yaffs_strcpy(old_name, _Y("silly old name")); - - if (in->fake && in != dev->root_dir && !force && !xmod) - return ret_val; - - yaffs_check_gc(dev, 0); - yaffs_check_obj_details_loaded(in); - - buffer = yaffs_get_temp_buffer(in->my_dev); - oh = (struct yaffs_obj_hdr *)buffer; - - prev_chunk_id = in->hdr_chunk; - - if (prev_chunk_id > 0) { - yaffs_rd_chunk_tags_nand(dev, prev_chunk_id, - buffer, &old_tags); - - yaffs_verify_oh(in, oh, &old_tags, 0); - memcpy(old_name, oh->name, sizeof(oh->name)); - memset(buffer, 0xff, sizeof(struct yaffs_obj_hdr)); - } else { - memset(buffer, 0xff, dev->data_bytes_per_chunk); - } - - oh->type = in->variant_type; - oh->yst_mode = in->yst_mode; - oh->shadows_obj = oh->inband_shadowed_obj_id = shadows; - - yaffs_load_attribs_oh(oh, in); - - if (in->parent) - oh->parent_obj_id = in->parent->obj_id; - else - oh->parent_obj_id = 0; - - if (name && *name) { - memset(oh->name, 0, sizeof(oh->name)); - yaffs_load_oh_from_name(dev, oh->name, name); - } else if (prev_chunk_id > 0) { - memcpy(oh->name, old_name, sizeof(oh->name)); - } else { - memset(oh->name, 0, sizeof(oh->name)); - } - - oh->is_shrink = is_shrink; - - switch (in->variant_type) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Should not happen */ - break; - case YAFFS_OBJECT_TYPE_FILE: - if (oh->parent_obj_id != YAFFS_OBJECTID_DELETED && - oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED) - file_size = in->variant.file_variant.file_size; - yaffs_oh_size_load(oh, file_size); - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - oh->equiv_id = in->variant.hardlink_variant.equiv_id; - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - alias = in->variant.symlink_variant.alias; - if (!alias) - alias = _Y("no alias"); - yaffs_strncpy(oh->alias, alias, YAFFS_MAX_ALIAS_LENGTH); - oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0; - break; - } - - /* process any xattrib modifications */ - if (xmod) - yaffs_apply_xattrib_mod(in, (char *)buffer, xmod); - - /* Tags */ - memset(&new_tags, 0, sizeof(new_tags)); - in->serial++; - new_tags.chunk_id = 0; - new_tags.obj_id = in->obj_id; - new_tags.serial_number = in->serial; - - /* Add extra info for file header */ - new_tags.extra_available = 1; - new_tags.extra_parent_id = oh->parent_obj_id; - new_tags.extra_file_size = file_size; - new_tags.extra_is_shrink = oh->is_shrink; - new_tags.extra_equiv_id = oh->equiv_id; - new_tags.extra_shadows = (oh->shadows_obj > 0) ? 1 : 0; - new_tags.extra_obj_type = in->variant_type; - yaffs_verify_oh(in, oh, &new_tags, 1); - - /* Create new chunk in NAND */ - new_chunk_id = - yaffs_write_new_chunk(dev, buffer, &new_tags, - (prev_chunk_id > 0) ? 1 : 0); - - if (buffer) - yaffs_release_temp_buffer(dev, buffer); - - if (new_chunk_id < 0) - return new_chunk_id; - - in->hdr_chunk = new_chunk_id; - - if (prev_chunk_id > 0) - yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__); - - if (!yaffs_obj_cache_dirty(in)) - in->dirty = 0; - - /* If this was a shrink, then mark the block - * that the chunk lives on */ - if (is_shrink) { - bi = yaffs_get_block_info(in->my_dev, - new_chunk_id / - in->my_dev->param.chunks_per_block); - bi->has_shrink_hdr = 1; - } - - return new_chunk_id; -} - -/*--------------------- File read/write ------------------------ - * Read and write have very similar structures. - * In general the read/write has three parts to it - * An incomplete chunk to start with (if the read/write is not chunk-aligned) - * Some complete chunks - * An incomplete chunk to end off with - * - * Curve-balls: the first chunk might also be the last chunk. - */ - -int yaffs_file_rd(struct yaffs_obj *in, u8 * buffer, loff_t offset, int n_bytes) -{ - int chunk; - u32 start; - int n_copy; - int n = n_bytes; - int n_done = 0; - struct yaffs_cache *cache; - struct yaffs_dev *dev; - - dev = in->my_dev; - - while (n > 0) { - yaffs_addr_to_chunk(dev, offset, &chunk, &start); - chunk++; - - /* OK now check for the curveball where the start and end are in - * the same chunk. - */ - if ((start + n) < dev->data_bytes_per_chunk) - n_copy = n; - else - n_copy = dev->data_bytes_per_chunk - start; - - cache = yaffs_find_chunk_cache(in, chunk); - - /* If the chunk is already in the cache or it is less than - * a whole chunk or we're using inband tags then use the cache - * (if there is caching) else bypass the cache. - */ - if (cache || n_copy != dev->data_bytes_per_chunk || - dev->param.inband_tags) { - if (dev->param.n_caches > 0) { - - /* If we can't find the data in the cache, - * then load it up. */ - - if (!cache) { - cache = - yaffs_grab_chunk_cache(in->my_dev); - cache->object = in; - cache->chunk_id = chunk; - cache->dirty = 0; - cache->locked = 0; - yaffs_rd_data_obj(in, chunk, - cache->data); - cache->n_bytes = 0; - } - - yaffs_use_cache(dev, cache, 0); - - cache->locked = 1; - - memcpy(buffer, &cache->data[start], n_copy); - - cache->locked = 0; - } else { - /* Read into the local buffer then copy.. */ - - u8 *local_buffer = - yaffs_get_temp_buffer(dev); - yaffs_rd_data_obj(in, chunk, local_buffer); - - memcpy(buffer, &local_buffer[start], n_copy); - - yaffs_release_temp_buffer(dev, local_buffer); - } - } else { - /* A full chunk. Read directly into the buffer. */ - yaffs_rd_data_obj(in, chunk, buffer); - } - n -= n_copy; - offset += n_copy; - buffer += n_copy; - n_done += n_copy; - } - return n_done; -} - -int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset, - int n_bytes, int write_through) -{ - - int chunk; - u32 start; - int n_copy; - int n = n_bytes; - int n_done = 0; - int n_writeback; - loff_t start_write = offset; - int chunk_written = 0; - u32 n_bytes_read; - loff_t chunk_start; - struct yaffs_dev *dev; - - dev = in->my_dev; - - while (n > 0 && chunk_written >= 0) { - yaffs_addr_to_chunk(dev, offset, &chunk, &start); - - if (((loff_t)chunk) * - dev->data_bytes_per_chunk + start != offset || - start >= dev->data_bytes_per_chunk) { - yaffs_trace(YAFFS_TRACE_ERROR, - "AddrToChunk of offset %lld gives chunk %d start %d", - offset, chunk, start); - } - chunk++; /* File pos to chunk in file offset */ - - /* OK now check for the curveball where the start and end are in - * the same chunk. - */ - - if ((start + n) < dev->data_bytes_per_chunk) { - n_copy = n; - - /* Now calculate how many bytes to write back.... - * If we're overwriting and not writing to then end of - * file then we need to write back as much as was there - * before. - */ - - chunk_start = (((loff_t)(chunk - 1)) * - dev->data_bytes_per_chunk); - - if (chunk_start > in->variant.file_variant.file_size) - n_bytes_read = 0; /* Past end of file */ - else - n_bytes_read = - in->variant.file_variant.file_size - - chunk_start; - - if (n_bytes_read > dev->data_bytes_per_chunk) - n_bytes_read = dev->data_bytes_per_chunk; - - n_writeback = - (n_bytes_read > - (start + n)) ? n_bytes_read : (start + n); - - if (n_writeback < 0 || - n_writeback > dev->data_bytes_per_chunk) - BUG(); - - } else { - n_copy = dev->data_bytes_per_chunk - start; - n_writeback = dev->data_bytes_per_chunk; - } - - if (n_copy != dev->data_bytes_per_chunk || - dev->param.inband_tags) { - /* An incomplete start or end chunk (or maybe both - * start and end chunk), or we're using inband tags, - * so we want to use the cache buffers. - */ - if (dev->param.n_caches > 0) { - struct yaffs_cache *cache; - - /* If we can't find the data in the cache, then - * load the cache */ - cache = yaffs_find_chunk_cache(in, chunk); - - if (!cache && - yaffs_check_alloc_available(dev, 1)) { - cache = yaffs_grab_chunk_cache(dev); - cache->object = in; - cache->chunk_id = chunk; - cache->dirty = 0; - cache->locked = 0; - yaffs_rd_data_obj(in, chunk, - cache->data); - } else if (cache && - !cache->dirty && - !yaffs_check_alloc_available(dev, - 1)) { - /* Drop the cache if it was a read cache - * item and no space check has been made - * for it. - */ - cache = NULL; - } - - if (cache) { - yaffs_use_cache(dev, cache, 1); - cache->locked = 1; - - memcpy(&cache->data[start], buffer, - n_copy); - - cache->locked = 0; - cache->n_bytes = n_writeback; - - if (write_through) { - chunk_written = - yaffs_wr_data_obj - (cache->object, - cache->chunk_id, - cache->data, - cache->n_bytes, 1); - cache->dirty = 0; - } - } else { - chunk_written = -1; /* fail write */ - } - } else { - /* An incomplete start or end chunk (or maybe - * both start and end chunk). Read into the - * local buffer then copy over and write back. - */ - - u8 *local_buffer = yaffs_get_temp_buffer(dev); - - yaffs_rd_data_obj(in, chunk, local_buffer); - memcpy(&local_buffer[start], buffer, n_copy); - - chunk_written = - yaffs_wr_data_obj(in, chunk, - local_buffer, - n_writeback, 0); - - yaffs_release_temp_buffer(dev, local_buffer); - } - } else { - /* A full chunk. Write directly from the buffer. */ - - chunk_written = - yaffs_wr_data_obj(in, chunk, buffer, - dev->data_bytes_per_chunk, 0); - - /* Since we've overwritten the cached data, - * we better invalidate it. */ - yaffs_invalidate_chunk_cache(in, chunk); - } - - if (chunk_written >= 0) { - n -= n_copy; - offset += n_copy; - buffer += n_copy; - n_done += n_copy; - } - } - - /* Update file object */ - - if ((start_write + n_done) > in->variant.file_variant.file_size) - in->variant.file_variant.file_size = (start_write + n_done); - - in->dirty = 1; - return n_done; -} - -int yaffs_wr_file(struct yaffs_obj *in, const u8 *buffer, loff_t offset, - int n_bytes, int write_through) -{ - yaffs2_handle_hole(in, offset); - return yaffs_do_file_wr(in, buffer, offset, n_bytes, write_through); -} - -/* ---------------------- File resizing stuff ------------------ */ - -static void yaffs_prune_chunks(struct yaffs_obj *in, loff_t new_size) -{ - - struct yaffs_dev *dev = in->my_dev; - loff_t old_size = in->variant.file_variant.file_size; - int i; - int chunk_id; - u32 dummy; - int last_del; - int start_del; - - if (old_size > 0) - yaffs_addr_to_chunk(dev, old_size - 1, &last_del, &dummy); - else - last_del = 0; - - yaffs_addr_to_chunk(dev, new_size + dev->data_bytes_per_chunk - 1, - &start_del, &dummy); - last_del++; - start_del++; - - /* Delete backwards so that we don't end up with holes if - * power is lost part-way through the operation. - */ - for (i = last_del; i >= start_del; i--) { - /* NB this could be optimised somewhat, - * eg. could retrieve the tags and write them without - * using yaffs_chunk_del - */ - - chunk_id = yaffs_find_del_file_chunk(in, i, NULL); - - if (chunk_id < 1) - continue; - - if (chunk_id < - (dev->internal_start_block * dev->param.chunks_per_block) || - chunk_id >= - ((dev->internal_end_block + 1) * - dev->param.chunks_per_block)) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "Found daft chunk_id %d for %d", - chunk_id, i); - } else { - in->n_data_chunks--; - yaffs_chunk_del(dev, chunk_id, 1, __LINE__); - } - } -} - -void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size) -{ - int new_full; - u32 new_partial; - struct yaffs_dev *dev = obj->my_dev; - - yaffs_addr_to_chunk(dev, new_size, &new_full, &new_partial); - - yaffs_prune_chunks(obj, new_size); - - if (new_partial != 0) { - int last_chunk = 1 + new_full; - u8 *local_buffer = yaffs_get_temp_buffer(dev); - - /* Rewrite the last chunk with its new size and zero pad */ - yaffs_rd_data_obj(obj, last_chunk, local_buffer); - memset(local_buffer + new_partial, 0, - dev->data_bytes_per_chunk - new_partial); - - yaffs_wr_data_obj(obj, last_chunk, local_buffer, - new_partial, 1); - - yaffs_release_temp_buffer(dev, local_buffer); - } - - obj->variant.file_variant.file_size = new_size; - - yaffs_prune_tree(dev, &obj->variant.file_variant); -} - -int yaffs_resize_file(struct yaffs_obj *in, loff_t new_size) -{ - struct yaffs_dev *dev = in->my_dev; - loff_t old_size = in->variant.file_variant.file_size; - - yaffs_flush_file_cache(in); - yaffs_invalidate_whole_cache(in); - - yaffs_check_gc(dev, 0); - - if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) - return YAFFS_FAIL; - - if (new_size == old_size) - return YAFFS_OK; - - if (new_size > old_size) { - yaffs2_handle_hole(in, new_size); - in->variant.file_variant.file_size = new_size; - } else { - /* new_size < old_size */ - yaffs_resize_file_down(in, new_size); - } - - /* Write a new object header to reflect the resize. - * show we've shrunk the file, if need be - * Do this only if the file is not in the deleted directories - * and is not shadowed. - */ - if (in->parent && - !in->is_shadowed && - in->parent->obj_id != YAFFS_OBJECTID_UNLINKED && - in->parent->obj_id != YAFFS_OBJECTID_DELETED) - yaffs_update_oh(in, NULL, 0, 0, 0, NULL); - - return YAFFS_OK; -} - -int yaffs_flush_file(struct yaffs_obj *in, int update_time, int data_sync) -{ - if (!in->dirty) - return YAFFS_OK; - - yaffs_flush_file_cache(in); - - if (data_sync) - return YAFFS_OK; - - if (update_time) - yaffs_load_current_time(in, 0, 0); - - return (yaffs_update_oh(in, NULL, 0, 0, 0, NULL) >= 0) ? - YAFFS_OK : YAFFS_FAIL; -} - -/* yaffs_del_file deletes the whole file data - * and the inode associated with the file. - * It does not delete the links associated with the file. - */ -static int yaffs_unlink_file_if_needed(struct yaffs_obj *in) -{ - int ret_val; - int del_now = 0; - struct yaffs_dev *dev = in->my_dev; - - if (!in->my_inode) - del_now = 1; - - if (del_now) { - ret_val = - yaffs_change_obj_name(in, in->my_dev->del_dir, - _Y("deleted"), 0, 0); - yaffs_trace(YAFFS_TRACE_TRACING, - "yaffs: immediate deletion of file %d", - in->obj_id); - in->deleted = 1; - in->my_dev->n_deleted_files++; - if (dev->param.disable_soft_del || dev->param.is_yaffs2) - yaffs_resize_file(in, 0); - yaffs_soft_del_file(in); - } else { - ret_val = - yaffs_change_obj_name(in, in->my_dev->unlinked_dir, - _Y("unlinked"), 0, 0); - } - return ret_val; -} - -int yaffs_del_file(struct yaffs_obj *in) -{ - int ret_val = YAFFS_OK; - int deleted; /* Need to cache value on stack if in is freed */ - struct yaffs_dev *dev = in->my_dev; - - if (dev->param.disable_soft_del || dev->param.is_yaffs2) - yaffs_resize_file(in, 0); - - if (in->n_data_chunks > 0) { - /* Use soft deletion if there is data in the file. - * That won't be the case if it has been resized to zero. - */ - if (!in->unlinked) - ret_val = yaffs_unlink_file_if_needed(in); - - deleted = in->deleted; - - if (ret_val == YAFFS_OK && in->unlinked && !in->deleted) { - in->deleted = 1; - deleted = 1; - in->my_dev->n_deleted_files++; - yaffs_soft_del_file(in); - } - return deleted ? YAFFS_OK : YAFFS_FAIL; - } else { - /* The file has no data chunks so we toss it immediately */ - yaffs_free_tnode(in->my_dev, in->variant.file_variant.top); - in->variant.file_variant.top = NULL; - yaffs_generic_obj_del(in); - - return YAFFS_OK; - } -} - -int yaffs_is_non_empty_dir(struct yaffs_obj *obj) -{ - return (obj && - obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) && - !(list_empty(&obj->variant.dir_variant.children)); -} - -static int yaffs_del_dir(struct yaffs_obj *obj) -{ - /* First check that the directory is empty. */ - if (yaffs_is_non_empty_dir(obj)) - return YAFFS_FAIL; - - return yaffs_generic_obj_del(obj); -} - -static int yaffs_del_symlink(struct yaffs_obj *in) -{ - kfree(in->variant.symlink_variant.alias); - in->variant.symlink_variant.alias = NULL; - - return yaffs_generic_obj_del(in); -} - -static int yaffs_del_link(struct yaffs_obj *in) -{ - /* remove this hardlink from the list associated with the equivalent - * object - */ - list_del_init(&in->hard_links); - return yaffs_generic_obj_del(in); -} - -int yaffs_del_obj(struct yaffs_obj *obj) -{ - int ret_val = -1; - - switch (obj->variant_type) { - case YAFFS_OBJECT_TYPE_FILE: - ret_val = yaffs_del_file(obj); - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - if (!list_empty(&obj->variant.dir_variant.dirty)) { - yaffs_trace(YAFFS_TRACE_BACKGROUND, - "Remove object %d from dirty directories", - obj->obj_id); - list_del_init(&obj->variant.dir_variant.dirty); - } - return yaffs_del_dir(obj); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - ret_val = yaffs_del_symlink(obj); - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - ret_val = yaffs_del_link(obj); - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - ret_val = yaffs_generic_obj_del(obj); - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - ret_val = 0; - break; /* should not happen. */ - } - return ret_val; -} - -static int yaffs_unlink_worker(struct yaffs_obj *obj) -{ - int del_now = 0; - - if (!obj) - return YAFFS_FAIL; - - if (!obj->my_inode) - del_now = 1; - - yaffs_update_parent(obj->parent); - - if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { - return yaffs_del_link(obj); - } else if (!list_empty(&obj->hard_links)) { - /* Curve ball: We're unlinking an object that has a hardlink. - * - * This problem arises because we are not strictly following - * The Linux link/inode model. - * - * We can't really delete the object. - * Instead, we do the following: - * - Select a hardlink. - * - Unhook it from the hard links - * - Move it from its parent directory so that the rename works. - * - Rename the object to the hardlink's name. - * - Delete the hardlink - */ - - struct yaffs_obj *hl; - struct yaffs_obj *parent; - int ret_val; - YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; - - hl = list_entry(obj->hard_links.next, struct yaffs_obj, - hard_links); - - yaffs_get_obj_name(hl, name, YAFFS_MAX_NAME_LENGTH + 1); - parent = hl->parent; - - list_del_init(&hl->hard_links); - - yaffs_add_obj_to_dir(obj->my_dev->unlinked_dir, hl); - - ret_val = yaffs_change_obj_name(obj, parent, name, 0, 0); - - if (ret_val == YAFFS_OK) - ret_val = yaffs_generic_obj_del(hl); - - return ret_val; - - } else if (del_now) { - switch (obj->variant_type) { - case YAFFS_OBJECT_TYPE_FILE: - return yaffs_del_file(obj); - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - list_del_init(&obj->variant.dir_variant.dirty); - return yaffs_del_dir(obj); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - return yaffs_del_symlink(obj); - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - return yaffs_generic_obj_del(obj); - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - case YAFFS_OBJECT_TYPE_UNKNOWN: - default: - return YAFFS_FAIL; - } - } else if (yaffs_is_non_empty_dir(obj)) { - return YAFFS_FAIL; - } else { - return yaffs_change_obj_name(obj, obj->my_dev->unlinked_dir, - _Y("unlinked"), 0, 0); - } -} - -static int yaffs_unlink_obj(struct yaffs_obj *obj) -{ - if (obj && obj->unlink_allowed) - return yaffs_unlink_worker(obj); - - return YAFFS_FAIL; -} - -int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR *name) -{ - struct yaffs_obj *obj; - - obj = yaffs_find_by_name(dir, name); - return yaffs_unlink_obj(obj); -} - -/* Note: - * If old_name is NULL then we take old_dir as the object to be renamed. - */ -int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR *old_name, - struct yaffs_obj *new_dir, const YCHAR *new_name) -{ - struct yaffs_obj *obj = NULL; - struct yaffs_obj *existing_target = NULL; - int force = 0; - int result; - struct yaffs_dev *dev; - - if (!old_dir || old_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - BUG(); - return YAFFS_FAIL; - } - if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - BUG(); - return YAFFS_FAIL; - } - - dev = old_dir->my_dev; - -#ifdef CONFIG_YAFFS_CASE_INSENSITIVE - /* Special case for case insemsitive systems. - * While look-up is case insensitive, the name isn't. - * Therefore we might want to change x.txt to X.txt - */ - if (old_dir == new_dir && - old_name && new_name && - yaffs_strcmp(old_name, new_name) == 0) - force = 1; -#endif - - if (yaffs_strnlen(new_name, YAFFS_MAX_NAME_LENGTH + 1) > - YAFFS_MAX_NAME_LENGTH) - /* ENAMETOOLONG */ - return YAFFS_FAIL; - - if (old_name) - obj = yaffs_find_by_name(old_dir, old_name); - else{ - obj = old_dir; - old_dir = obj->parent; - } - - if (obj && obj->rename_allowed) { - /* Now handle an existing target, if there is one */ - existing_target = yaffs_find_by_name(new_dir, new_name); - if (yaffs_is_non_empty_dir(existing_target)) { - return YAFFS_FAIL; /* ENOTEMPTY */ - } else if (existing_target && existing_target != obj) { - /* Nuke the target first, using shadowing, - * but only if it isn't the same object. - * - * Note we must disable gc here otherwise it can mess - * up the shadowing. - * - */ - dev->gc_disable = 1; - yaffs_change_obj_name(obj, new_dir, new_name, force, - existing_target->obj_id); - existing_target->is_shadowed = 1; - yaffs_unlink_obj(existing_target); - dev->gc_disable = 0; - } - - result = yaffs_change_obj_name(obj, new_dir, new_name, 1, 0); - - yaffs_update_parent(old_dir); - if (new_dir != old_dir) - yaffs_update_parent(new_dir); - - return result; - } - return YAFFS_FAIL; -} - -/*----------------------- Initialisation Scanning ---------------------- */ - -void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id, - int backward_scanning) -{ - struct yaffs_obj *obj; - - if (backward_scanning) { - /* Handle YAFFS2 case (backward scanning) - * If the shadowed object exists then ignore. - */ - obj = yaffs_find_by_number(dev, obj_id); - if (obj) - return; - } - - /* Let's create it (if it does not exist) assuming it is a file so that - * it can do shrinking etc. - * We put it in unlinked dir to be cleaned up after the scanning - */ - obj = - yaffs_find_or_create_by_number(dev, obj_id, YAFFS_OBJECT_TYPE_FILE); - if (!obj) - return; - obj->is_shadowed = 1; - yaffs_add_obj_to_dir(dev->unlinked_dir, obj); - obj->variant.file_variant.shrink_size = 0; - obj->valid = 1; /* So that we don't read any other info. */ -} - -void yaffs_link_fixup(struct yaffs_dev *dev, struct list_head *hard_list) -{ - struct list_head *lh; - struct list_head *save; - struct yaffs_obj *hl; - struct yaffs_obj *in; - - list_for_each_safe(lh, save, hard_list) { - hl = list_entry(lh, struct yaffs_obj, hard_links); - in = yaffs_find_by_number(dev, - hl->variant.hardlink_variant.equiv_id); - - if (in) { - /* Add the hardlink pointers */ - hl->variant.hardlink_variant.equiv_obj = in; - list_add(&hl->hard_links, &in->hard_links); - } else { - /* Todo Need to report/handle this better. - * Got a problem... hardlink to a non-existant object - */ - hl->variant.hardlink_variant.equiv_obj = NULL; - INIT_LIST_HEAD(&hl->hard_links); - } - } -} - -static void yaffs_strip_deleted_objs(struct yaffs_dev *dev) -{ - /* - * Sort out state of unlinked and deleted objects after scanning. - */ - struct list_head *i; - struct list_head *n; - struct yaffs_obj *l; - - if (dev->read_only) - return; - - /* Soft delete all the unlinked files */ - list_for_each_safe(i, n, - &dev->unlinked_dir->variant.dir_variant.children) { - l = list_entry(i, struct yaffs_obj, siblings); - yaffs_del_obj(l); - } - - list_for_each_safe(i, n, &dev->del_dir->variant.dir_variant.children) { - l = list_entry(i, struct yaffs_obj, siblings); - yaffs_del_obj(l); - } -} - -/* - * This code iterates through all the objects making sure that they are rooted. - * Any unrooted objects are re-rooted in lost+found. - * An object needs to be in one of: - * - Directly under deleted, unlinked - * - Directly or indirectly under root. - * - * Note: - * This code assumes that we don't ever change the current relationships - * between directories: - * root_dir->parent == unlinked_dir->parent == del_dir->parent == NULL - * lost-n-found->parent == root_dir - * - * This fixes the problem where directories might have inadvertently been - * deleted leaving the object "hanging" without being rooted in the - * directory tree. - */ - -static int yaffs_has_null_parent(struct yaffs_dev *dev, struct yaffs_obj *obj) -{ - return (obj == dev->del_dir || - obj == dev->unlinked_dir || obj == dev->root_dir); -} - -static void yaffs_fix_hanging_objs(struct yaffs_dev *dev) -{ - struct yaffs_obj *obj; - struct yaffs_obj *parent; - int i; - struct list_head *lh; - struct list_head *n; - int depth_limit; - int hanging; - - if (dev->read_only) - return; - - /* Iterate through the objects in each hash entry, - * looking at each object. - * Make sure it is rooted. - */ - - for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { - list_for_each_safe(lh, n, &dev->obj_bucket[i].list) { - obj = list_entry(lh, struct yaffs_obj, hash_link); - parent = obj->parent; - - if (yaffs_has_null_parent(dev, obj)) { - /* These directories are not hanging */ - hanging = 0; - } else if (!parent || - parent->variant_type != - YAFFS_OBJECT_TYPE_DIRECTORY) { - hanging = 1; - } else if (yaffs_has_null_parent(dev, parent)) { - hanging = 0; - } else { - /* - * Need to follow the parent chain to - * see if it is hanging. - */ - hanging = 0; - depth_limit = 100; - - while (parent != dev->root_dir && - parent->parent && - parent->parent->variant_type == - YAFFS_OBJECT_TYPE_DIRECTORY && - depth_limit > 0) { - parent = parent->parent; - depth_limit--; - } - if (parent != dev->root_dir) - hanging = 1; - } - if (hanging) { - yaffs_trace(YAFFS_TRACE_SCAN, - "Hanging object %d moved to lost and found", - obj->obj_id); - yaffs_add_obj_to_dir(dev->lost_n_found, obj); - } - } - } -} - -/* - * Delete directory contents for cleaning up lost and found. - */ -static void yaffs_del_dir_contents(struct yaffs_obj *dir) -{ - struct yaffs_obj *obj; - struct list_head *lh; - struct list_head *n; - - if (dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) - BUG(); - - list_for_each_safe(lh, n, &dir->variant.dir_variant.children) { - obj = list_entry(lh, struct yaffs_obj, siblings); - if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) - yaffs_del_dir_contents(obj); - yaffs_trace(YAFFS_TRACE_SCAN, - "Deleting lost_found object %d", - obj->obj_id); - yaffs_unlink_obj(obj); - } -} - -static void yaffs_empty_l_n_f(struct yaffs_dev *dev) -{ - yaffs_del_dir_contents(dev->lost_n_found); -} - -struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *directory, - const YCHAR *name) -{ - int sum; - struct list_head *i; - YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1]; - struct yaffs_obj *l; - - if (!name) - return NULL; - - if (!directory) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "tragedy: yaffs_find_by_name: null pointer directory" - ); - BUG(); - return NULL; - } - if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "tragedy: yaffs_find_by_name: non-directory" - ); - BUG(); - } - - sum = yaffs_calc_name_sum(name); - - list_for_each(i, &directory->variant.dir_variant.children) { - l = list_entry(i, struct yaffs_obj, siblings); - - if (l->parent != directory) - BUG(); - - yaffs_check_obj_details_loaded(l); - - /* Special case for lost-n-found */ - if (l->obj_id == YAFFS_OBJECTID_LOSTNFOUND) { - if (!yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME)) - return l; - } else if (l->sum == sum || l->hdr_chunk <= 0) { - /* LostnFound chunk called Objxxx - * Do a real check - */ - yaffs_get_obj_name(l, buffer, - YAFFS_MAX_NAME_LENGTH + 1); - if (!yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH)) - return l; - } - } - return NULL; -} - -/* GetEquivalentObject dereferences any hard links to get to the - * actual object. - */ - -struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj) -{ - if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { - obj = obj->variant.hardlink_variant.equiv_obj; - yaffs_check_obj_details_loaded(obj); - } - return obj; -} - -/* - * A note or two on object names. - * * If the object name is missing, we then make one up in the form objnnn - * - * * ASCII names are stored in the object header's name field from byte zero - * * Unicode names are historically stored starting from byte zero. - * - * Then there are automatic Unicode names... - * The purpose of these is to save names in a way that can be read as - * ASCII or Unicode names as appropriate, thus allowing a Unicode and ASCII - * system to share files. - * - * These automatic unicode are stored slightly differently... - * - If the name can fit in the ASCII character space then they are saved as - * ascii names as per above. - * - If the name needs Unicode then the name is saved in Unicode - * starting at oh->name[1]. - - */ -static void yaffs_fix_null_name(struct yaffs_obj *obj, YCHAR *name, - int buffer_size) -{ - /* Create an object name if we could not find one. */ - if (yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH) == 0) { - YCHAR local_name[20]; - YCHAR num_string[20]; - YCHAR *x = &num_string[19]; - unsigned v = obj->obj_id; - num_string[19] = 0; - while (v > 0) { - x--; - *x = '0' + (v % 10); - v /= 10; - } - /* make up a name */ - yaffs_strcpy(local_name, YAFFS_LOSTNFOUND_PREFIX); - yaffs_strcat(local_name, x); - yaffs_strncpy(name, local_name, buffer_size - 1); - } -} - -int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR *name, int buffer_size) -{ - memset(name, 0, buffer_size * sizeof(YCHAR)); - yaffs_check_obj_details_loaded(obj); - if (obj->obj_id == YAFFS_OBJECTID_LOSTNFOUND) { - yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffer_size - 1); - } else if (obj->short_name[0]) { - yaffs_strcpy(name, obj->short_name); - } else if (obj->hdr_chunk > 0) { - u8 *buffer = yaffs_get_temp_buffer(obj->my_dev); - - struct yaffs_obj_hdr *oh = (struct yaffs_obj_hdr *)buffer; - - memset(buffer, 0, obj->my_dev->data_bytes_per_chunk); - - if (obj->hdr_chunk > 0) { - yaffs_rd_chunk_tags_nand(obj->my_dev, - obj->hdr_chunk, - buffer, NULL); - } - yaffs_load_name_from_oh(obj->my_dev, name, oh->name, - buffer_size); - - yaffs_release_temp_buffer(obj->my_dev, buffer); - } - - yaffs_fix_null_name(obj, name, buffer_size); - - return yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH); -} - -loff_t yaffs_get_obj_length(struct yaffs_obj *obj) -{ - /* Dereference any hard linking */ - obj = yaffs_get_equivalent_obj(obj); - - if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) - return obj->variant.file_variant.file_size; - if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) { - if (!obj->variant.symlink_variant.alias) - return 0; - return yaffs_strnlen(obj->variant.symlink_variant.alias, - YAFFS_MAX_ALIAS_LENGTH); - } else { - /* Only a directory should drop through to here */ - return obj->my_dev->data_bytes_per_chunk; - } -} - -int yaffs_get_obj_link_count(struct yaffs_obj *obj) -{ - int count = 0; - - if (!obj->unlinked) - count++; /* the object itself */ - - /* add the hard links; */ - count += list_count_nodes(&obj->hard_links); - - return count; -} - -int yaffs_get_obj_inode(struct yaffs_obj *obj) -{ - obj = yaffs_get_equivalent_obj(obj); - - return obj->obj_id; -} - -unsigned yaffs_get_obj_type(struct yaffs_obj *obj) -{ - obj = yaffs_get_equivalent_obj(obj); - - switch (obj->variant_type) { - case YAFFS_OBJECT_TYPE_FILE: - return DT_REG; - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - return DT_DIR; - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - return DT_LNK; - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - return DT_REG; - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - if (S_ISFIFO(obj->yst_mode)) - return DT_FIFO; - if (S_ISCHR(obj->yst_mode)) - return DT_CHR; - if (S_ISBLK(obj->yst_mode)) - return DT_BLK; - if (S_ISSOCK(obj->yst_mode)) - return DT_SOCK; - return DT_REG; - break; - default: - return DT_REG; - break; - } -} - -YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj) -{ - obj = yaffs_get_equivalent_obj(obj); - if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) - return yaffs_clone_str(obj->variant.symlink_variant.alias); - else - return yaffs_clone_str(_Y("")); -} - -/*--------------------------- Initialisation code -------------------------- */ - -static int yaffs_check_dev_fns(const struct yaffs_dev *dev) -{ - /* Common functions, gotta have */ - if (!dev->param.erase_fn || !dev->param.initialise_flash_fn) - return 0; - - /* Can use the "with tags" style interface for yaffs1 or yaffs2 */ - if (dev->param.write_chunk_tags_fn && - dev->param.read_chunk_tags_fn && - !dev->param.write_chunk_fn && - !dev->param.read_chunk_fn && - dev->param.bad_block_fn && dev->param.query_block_fn) - return 1; - - /* Can use the "spare" style interface for yaffs1 */ - if (!dev->param.is_yaffs2 && - !dev->param.write_chunk_tags_fn && - !dev->param.read_chunk_tags_fn && - dev->param.write_chunk_fn && - dev->param.read_chunk_fn && - !dev->param.bad_block_fn && !dev->param.query_block_fn) - return 1; - - return 0; /* bad */ -} - -static int yaffs_create_initial_dir(struct yaffs_dev *dev) -{ - /* Initialise the unlinked, deleted, root and lost+found directories */ - dev->lost_n_found = dev->root_dir = NULL; - dev->unlinked_dir = dev->del_dir = NULL; - dev->unlinked_dir = - yaffs_create_fake_dir(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR); - dev->del_dir = - yaffs_create_fake_dir(dev, YAFFS_OBJECTID_DELETED, S_IFDIR); - dev->root_dir = - yaffs_create_fake_dir(dev, YAFFS_OBJECTID_ROOT, - YAFFS_ROOT_MODE | S_IFDIR); - dev->lost_n_found = - yaffs_create_fake_dir(dev, YAFFS_OBJECTID_LOSTNFOUND, - YAFFS_LOSTNFOUND_MODE | S_IFDIR); - - if (dev->lost_n_found && dev->root_dir && dev->unlinked_dir - && dev->del_dir) { - yaffs_add_obj_to_dir(dev->root_dir, dev->lost_n_found); - return YAFFS_OK; - } - return YAFFS_FAIL; -} - -int yaffs_guts_initialise(struct yaffs_dev *dev) -{ - int init_failed = 0; - unsigned x; - int bits; - - yaffs_trace(YAFFS_TRACE_TRACING, "yaffs: yaffs_guts_initialise()"); - - /* Check stuff that must be set */ - - if (!dev) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "yaffs: Need a device" - ); - return YAFFS_FAIL; - } - - if (dev->is_mounted) { - yaffs_trace(YAFFS_TRACE_ALWAYS, "device already mounted"); - return YAFFS_FAIL; - } - - dev->internal_start_block = dev->param.start_block; - dev->internal_end_block = dev->param.end_block; - dev->block_offset = 0; - dev->chunk_offset = 0; - dev->n_free_chunks = 0; - - dev->gc_block = 0; - - if (dev->param.start_block == 0) { - dev->internal_start_block = dev->param.start_block + 1; - dev->internal_end_block = dev->param.end_block + 1; - dev->block_offset = 1; - dev->chunk_offset = dev->param.chunks_per_block; - } - - /* Check geometry parameters. */ - - if ((!dev->param.inband_tags && dev->param.is_yaffs2 && - dev->param.total_bytes_per_chunk < 1024) || - (!dev->param.is_yaffs2 && - dev->param.total_bytes_per_chunk < 512) || - (dev->param.inband_tags && !dev->param.is_yaffs2) || - dev->param.chunks_per_block < 2 || - dev->param.n_reserved_blocks < 2 || - dev->internal_start_block <= 0 || - dev->internal_end_block <= 0 || - dev->internal_end_block <= - (dev->internal_start_block + dev->param.n_reserved_blocks + 2) - ) { - /* otherwise it is too small */ - yaffs_trace(YAFFS_TRACE_ALWAYS, - "NAND geometry problems: chunk size %d, type is yaffs%s, inband_tags %d ", - dev->param.total_bytes_per_chunk, - dev->param.is_yaffs2 ? "2" : "", - dev->param.inband_tags); - return YAFFS_FAIL; - } - - if (yaffs_init_nand(dev) != YAFFS_OK) { - yaffs_trace(YAFFS_TRACE_ALWAYS, "InitialiseNAND failed"); - return YAFFS_FAIL; - } - - /* Sort out space for inband tags, if required */ - if (dev->param.inband_tags) - dev->data_bytes_per_chunk = - dev->param.total_bytes_per_chunk - - sizeof(struct yaffs_packed_tags2_tags_only); - else - dev->data_bytes_per_chunk = dev->param.total_bytes_per_chunk; - - /* Got the right mix of functions? */ - if (!yaffs_check_dev_fns(dev)) { - /* Function missing */ - yaffs_trace(YAFFS_TRACE_ALWAYS, - "device function(s) missing or wrong"); - - return YAFFS_FAIL; - } - - /* Finished with most checks. Further checks happen later on too. */ - - dev->is_mounted = 1; - - /* OK now calculate a few things for the device */ - - /* - * Calculate all the chunk size manipulation numbers: - */ - x = dev->data_bytes_per_chunk; - /* We always use dev->chunk_shift and dev->chunk_div */ - dev->chunk_shift = calc_shifts(x); - x >>= dev->chunk_shift; - dev->chunk_div = x; - /* We only use chunk mask if chunk_div is 1 */ - dev->chunk_mask = (1 << dev->chunk_shift) - 1; - - /* - * Calculate chunk_grp_bits. - * We need to find the next power of 2 > than internal_end_block - */ - - x = dev->param.chunks_per_block * (dev->internal_end_block + 1); - - bits = calc_shifts_ceiling(x); - - /* Set up tnode width if wide tnodes are enabled. */ - if (!dev->param.wide_tnodes_disabled) { - /* bits must be even so that we end up with 32-bit words */ - if (bits & 1) - bits++; - if (bits < 16) - dev->tnode_width = 16; - else - dev->tnode_width = bits; - } else { - dev->tnode_width = 16; - } - - dev->tnode_mask = (1 << dev->tnode_width) - 1; - - /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled), - * so if the bitwidth of the - * chunk range we're using is greater than 16 we need - * to figure out chunk shift and chunk_grp_size - */ - - if (bits <= dev->tnode_width) - dev->chunk_grp_bits = 0; - else - dev->chunk_grp_bits = bits - dev->tnode_width; - - dev->tnode_size = (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8; - if (dev->tnode_size < sizeof(struct yaffs_tnode)) - dev->tnode_size = sizeof(struct yaffs_tnode); - - dev->chunk_grp_size = 1 << dev->chunk_grp_bits; - - if (dev->param.chunks_per_block < dev->chunk_grp_size) { - /* We have a problem because the soft delete won't work if - * the chunk group size > chunks per block. - * This can be remedied by using larger "virtual blocks". - */ - yaffs_trace(YAFFS_TRACE_ALWAYS, "chunk group too large"); - - return YAFFS_FAIL; - } - - /* Finished verifying the device, continue with initialisation */ - - /* More device initialisation */ - dev->all_gcs = 0; - dev->passive_gc_count = 0; - dev->oldest_dirty_gc_count = 0; - dev->bg_gcs = 0; - dev->gc_block_finder = 0; - dev->buffered_block = -1; - dev->doing_buffered_block_rewrite = 0; - dev->n_deleted_files = 0; - dev->n_bg_deletions = 0; - dev->n_unlinked_files = 0; - dev->n_ecc_fixed = 0; - dev->n_ecc_unfixed = 0; - dev->n_tags_ecc_fixed = 0; - dev->n_tags_ecc_unfixed = 0; - dev->n_erase_failures = 0; - dev->n_erased_blocks = 0; - dev->gc_disable = 0; - dev->has_pending_prioritised_gc = 1; - /* Assume the worst for now, will get fixed on first GC */ - INIT_LIST_HEAD(&dev->dirty_dirs); - dev->oldest_dirty_seq = 0; - dev->oldest_dirty_block = 0; - - /* Initialise temporary buffers and caches. */ - if (!yaffs_init_tmp_buffers(dev)) - init_failed = 1; - - dev->cache = NULL; - dev->gc_cleanup_list = NULL; - - if (!init_failed && dev->param.n_caches > 0) { - int i; - void *buf; - int cache_bytes = - dev->param.n_caches * sizeof(struct yaffs_cache); - - if (dev->param.n_caches > YAFFS_MAX_SHORT_OP_CACHES) - dev->param.n_caches = YAFFS_MAX_SHORT_OP_CACHES; - - dev->cache = kmalloc(cache_bytes, GFP_NOFS); - - buf = (u8 *) dev->cache; - - if (dev->cache) - memset(dev->cache, 0, cache_bytes); - - for (i = 0; i < dev->param.n_caches && buf; i++) { - dev->cache[i].object = NULL; - dev->cache[i].last_use = 0; - dev->cache[i].dirty = 0; - dev->cache[i].data = buf = - kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); - } - if (!buf) - init_failed = 1; - - dev->cache_last_use = 0; - } - - dev->cache_hits = 0; - - if (!init_failed) { - dev->gc_cleanup_list = - kmalloc(dev->param.chunks_per_block * sizeof(u32), - GFP_NOFS); - if (!dev->gc_cleanup_list) - init_failed = 1; - } - - if (dev->param.is_yaffs2) - dev->param.use_header_file_size = 1; - - if (!init_failed && !yaffs_init_blocks(dev)) - init_failed = 1; - - yaffs_init_tnodes_and_objs(dev); - - if (!init_failed && !yaffs_create_initial_dir(dev)) - init_failed = 1; - - if (!init_failed && dev->param.is_yaffs2 && - !dev->param.disable_summary && - !yaffs_summary_init(dev)) - init_failed = 1; - - if (!init_failed) { - /* Now scan the flash. */ - if (dev->param.is_yaffs2) { - if (yaffs2_checkpt_restore(dev)) { - yaffs_check_obj_details_loaded(dev->root_dir); - yaffs_trace(YAFFS_TRACE_CHECKPOINT | - YAFFS_TRACE_MOUNT, - "yaffs: restored from checkpoint" - ); - } else { - - /* Clean up the mess caused by an aborted - * checkpoint load then scan backwards. - */ - yaffs_deinit_blocks(dev); - - yaffs_deinit_tnodes_and_objs(dev); - - dev->n_erased_blocks = 0; - dev->n_free_chunks = 0; - dev->alloc_block = -1; - dev->alloc_page = -1; - dev->n_deleted_files = 0; - dev->n_unlinked_files = 0; - dev->n_bg_deletions = 0; - - if (!init_failed && !yaffs_init_blocks(dev)) - init_failed = 1; - - yaffs_init_tnodes_and_objs(dev); - - if (!init_failed - && !yaffs_create_initial_dir(dev)) - init_failed = 1; - - if (!init_failed && !yaffs2_scan_backwards(dev)) - init_failed = 1; - } - } else if (!yaffs1_scan(dev)) { - init_failed = 1; - } - - yaffs_strip_deleted_objs(dev); - yaffs_fix_hanging_objs(dev); - if (dev->param.empty_lost_n_found) - yaffs_empty_l_n_f(dev); - } - - if (init_failed) { - /* Clean up the mess */ - yaffs_trace(YAFFS_TRACE_TRACING, - "yaffs: yaffs_guts_initialise() aborted."); - - yaffs_deinitialise(dev); - return YAFFS_FAIL; - } - - /* Zero out stats */ - dev->n_page_reads = 0; - dev->n_page_writes = 0; - dev->n_erasures = 0; - dev->n_gc_copies = 0; - dev->n_retried_writes = 0; - - dev->n_retired_blocks = 0; - - yaffs_verify_free_chunks(dev); - yaffs_verify_blocks(dev); - - /* Clean up any aborted checkpoint data */ - if (!dev->is_checkpointed && dev->blocks_in_checkpt > 0) - yaffs2_checkpt_invalidate(dev); - - yaffs_trace(YAFFS_TRACE_TRACING, - "yaffs: yaffs_guts_initialise() done."); - return YAFFS_OK; -} - -void yaffs_deinitialise(struct yaffs_dev *dev) -{ - if (dev->is_mounted) { - int i; - - yaffs_deinit_blocks(dev); - yaffs_deinit_tnodes_and_objs(dev); - yaffs_summary_deinit(dev); - - if (dev->param.n_caches > 0 && dev->cache) { - - for (i = 0; i < dev->param.n_caches; i++) { - kfree(dev->cache[i].data); - dev->cache[i].data = NULL; - } - - kfree(dev->cache); - dev->cache = NULL; - } - - kfree(dev->gc_cleanup_list); - - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) - kfree(dev->temp_buffer[i].buffer); - - dev->is_mounted = 0; - - if (dev->param.deinitialise_flash_fn) - dev->param.deinitialise_flash_fn(dev); - } -} - -int yaffs_count_free_chunks(struct yaffs_dev *dev) -{ - int n_free = 0; - int b; - struct yaffs_block_info *blk; - - blk = dev->block_info; - for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) { - switch (blk->block_state) { - case YAFFS_BLOCK_STATE_EMPTY: - case YAFFS_BLOCK_STATE_ALLOCATING: - case YAFFS_BLOCK_STATE_COLLECTING: - case YAFFS_BLOCK_STATE_FULL: - n_free += - (dev->param.chunks_per_block - blk->pages_in_use + - blk->soft_del_pages); - break; - default: - break; - } - blk++; - } - return n_free; -} - -int yaffs_get_n_free_chunks(struct yaffs_dev *dev) -{ - /* This is what we report to the outside world */ - int n_free; - int n_dirty_caches; - int blocks_for_checkpt; - int i; - - n_free = dev->n_free_chunks; - n_free += dev->n_deleted_files; - - /* Now count and subtract the number of dirty chunks in the cache. */ - - for (n_dirty_caches = 0, i = 0; i < dev->param.n_caches; i++) { - if (dev->cache[i].dirty) - n_dirty_caches++; - } - - n_free -= n_dirty_caches; - - n_free -= - ((dev->param.n_reserved_blocks + 1) * dev->param.chunks_per_block); - - /* Now figure checkpoint space and report that... */ - blocks_for_checkpt = yaffs_calc_checkpt_blocks_required(dev); - - n_free -= (blocks_for_checkpt * dev->param.chunks_per_block); - - if (n_free < 0) - n_free = 0; - - return n_free; -} - -/*\ - * Marshalling functions to get loff_t file sizes into aand out of - * object headers. - */ -void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize) -{ - oh->file_size_low = (fsize & 0xFFFFFFFF); - oh->file_size_high = ((fsize >> 32) & 0xFFFFFFFF); -} - -loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh) -{ - loff_t retval; - - if (~(oh->file_size_high)) - retval = (((loff_t) oh->file_size_high) << 32) | - (((loff_t) oh->file_size_low) & 0xFFFFFFFF); - else - retval = (loff_t) oh->file_size_low; - - return retval; -} diff --git a/fs/yaffs2/yaffs_guts.h b/fs/yaffs2/yaffs_guts.h deleted file mode 100644 index f4e7f796bd1..00000000000 --- a/fs/yaffs2/yaffs_guts.h +++ /dev/null @@ -1,969 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_GUTS_H__ -#define __YAFFS_GUTS_H__ - -#include "yportenv.h" - -#define YAFFS_OK 1 -#define YAFFS_FAIL 0 - -/* Give us a Y=0x59, - * Give us an A=0x41, - * Give us an FF=0xff - * Give us an S=0x53 - * And what have we got... - */ -#define YAFFS_MAGIC 0x5941ff53 - -/* - * Tnodes form a tree with the tnodes in "levels" - * Levels greater than 0 hold 8 slots which point to other tnodes. - * Those at level 0 hold 16 slots which point to chunks in NAND. - * - * A maximum level of 8 thust supports files of size up to: - * - * 2^(3*MAX_LEVEL+4) - * - * Thus a max level of 8 supports files with up to 2^^28 chunks which gives - * a maximum file size of arounf 51Gbytees with 2k chunks. - */ -#define YAFFS_NTNODES_LEVEL0 16 -#define YAFFS_TNODES_LEVEL0_BITS 4 -#define YAFFS_TNODES_LEVEL0_MASK 0xf - -#define YAFFS_NTNODES_INTERNAL (YAFFS_NTNODES_LEVEL0 / 2) -#define YAFFS_TNODES_INTERNAL_BITS (YAFFS_TNODES_LEVEL0_BITS - 1) -#define YAFFS_TNODES_INTERNAL_MASK 0x7 -#define YAFFS_TNODES_MAX_LEVEL 8 -#define YAFFS_TNODES_MAX_BITS (YAFFS_TNODES_LEVEL0_BITS + \ - YAFFS_TNODES_INTERNAL_BITS * \ - YAFFS_TNODES_MAX_LEVEL) -#define YAFFS_MAX_CHUNK_ID ((1 << YAFFS_TNODES_MAX_BITS) - 1) - -/* Constants for YAFFS1 mode */ -#define YAFFS_BYTES_PER_SPARE 16 -#define YAFFS_BYTES_PER_CHUNK 512 -#define YAFFS_CHUNK_SIZE_SHIFT 9 -#define YAFFS_CHUNKS_PER_BLOCK 32 -#define YAFFS_BYTES_PER_BLOCK (YAFFS_CHUNKS_PER_BLOCK*YAFFS_BYTES_PER_CHUNK) - -#define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024 -#define YAFFS_MIN_YAFFS2_SPARE_SIZE 32 - -#define YAFFS_ALLOCATION_NOBJECTS 100 -#define YAFFS_ALLOCATION_NTNODES 100 -#define YAFFS_ALLOCATION_NLINKS 100 - -#define YAFFS_NOBJECT_BUCKETS 256 - -#define YAFFS_OBJECT_SPACE 0x40000 -#define YAFFS_MAX_OBJECT_ID (YAFFS_OBJECT_SPACE - 1) - -/* Binary data version stamps */ -#define YAFFS_SUMMARY_VERSION 1 -#define YAFFS_CHECKPOINT_VERSION 6 - -#ifdef CONFIG_YAFFS_UNICODE -#define YAFFS_MAX_NAME_LENGTH 127 -#define YAFFS_MAX_ALIAS_LENGTH 79 -#else -#define YAFFS_MAX_NAME_LENGTH 255 -#define YAFFS_MAX_ALIAS_LENGTH 159 -#endif - -#define YAFFS_SHORT_NAME_LENGTH 15 - -/* Some special object ids for pseudo objects */ -#define YAFFS_OBJECTID_ROOT 1 -#define YAFFS_OBJECTID_LOSTNFOUND 2 -#define YAFFS_OBJECTID_UNLINKED 3 -#define YAFFS_OBJECTID_DELETED 4 - -/* Fake object Id for summary data */ -#define YAFFS_OBJECTID_SUMMARY 0x10 - -/* Pseudo object ids for checkpointing */ -#define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20 -#define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21 - -#define YAFFS_MAX_SHORT_OP_CACHES 20 - -#define YAFFS_N_TEMP_BUFFERS 6 - -/* We limit the number attempts at sucessfully saving a chunk of data. - * Small-page devices have 32 pages per block; large-page devices have 64. - * Default to something in the order of 5 to 10 blocks worth of chunks. - */ -#define YAFFS_WR_ATTEMPTS (5*64) - -/* Sequence numbers are used in YAFFS2 to determine block allocation order. - * The range is limited slightly to help distinguish bad numbers from good. - * This also allows us to perhaps in the future use special numbers for - * special purposes. - * EFFFFF00 allows the allocation of 8 blocks/second (~1Mbytes) for 15 years, - * and is a larger number than the lifetime of a 2GB device. - */ -#define YAFFS_LOWEST_SEQUENCE_NUMBER 0x00001000 -#define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xefffff00 - -/* Special sequence number for bad block that failed to be marked bad */ -#define YAFFS_SEQUENCE_BAD_BLOCK 0xffff0000 - -/* ChunkCache is used for short read/write operations.*/ -struct yaffs_cache { - struct yaffs_obj *object; - int chunk_id; - int last_use; - int dirty; - int n_bytes; /* Only valid if the cache is dirty */ - int locked; /* Can't push out or flush while locked. */ - u8 *data; -}; - -/* yaffs1 tags structures in RAM - * NB This uses bitfield. Bitfields should not straddle a u32 boundary - * otherwise the structure size will get blown out. - */ - -struct yaffs_tags { - unsigned chunk_id:20; - unsigned serial_number:2; - unsigned n_bytes_lsb:10; - unsigned obj_id:18; - unsigned ecc:12; - unsigned n_bytes_msb:2; -}; - -union yaffs_tags_union { - struct yaffs_tags as_tags; - u8 as_bytes[8]; -}; - -/* Stuff used for extended tags in YAFFS2 */ - -enum yaffs_ecc_result { - YAFFS_ECC_RESULT_UNKNOWN, - YAFFS_ECC_RESULT_NO_ERROR, - YAFFS_ECC_RESULT_FIXED, - YAFFS_ECC_RESULT_UNFIXED -}; - -enum yaffs_obj_type { - YAFFS_OBJECT_TYPE_UNKNOWN, - YAFFS_OBJECT_TYPE_FILE, - YAFFS_OBJECT_TYPE_SYMLINK, - YAFFS_OBJECT_TYPE_DIRECTORY, - YAFFS_OBJECT_TYPE_HARDLINK, - YAFFS_OBJECT_TYPE_SPECIAL -}; - -#define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL - -struct yaffs_ext_tags { - unsigned chunk_used; /* Status of the chunk: used or unused */ - unsigned obj_id; /* If 0 this is not used */ - unsigned chunk_id; /* If 0 this is a header, else a data chunk */ - unsigned n_bytes; /* Only valid for data chunks */ - - /* The following stuff only has meaning when we read */ - enum yaffs_ecc_result ecc_result; - unsigned block_bad; - - /* YAFFS 1 stuff */ - unsigned is_deleted; /* The chunk is marked deleted */ - unsigned serial_number; /* Yaffs1 2-bit serial number */ - - /* YAFFS2 stuff */ - unsigned seq_number; /* The sequence number of this block */ - - /* Extra info if this is an object header (YAFFS2 only) */ - - unsigned extra_available; /* Extra info available if not zero */ - unsigned extra_parent_id; /* The parent object */ - unsigned extra_is_shrink; /* Is it a shrink header? */ - unsigned extra_shadows; /* Does this shadow another object? */ - - enum yaffs_obj_type extra_obj_type; /* What object type? */ - - loff_t extra_file_size; /* Length if it is a file */ - unsigned extra_equiv_id; /* Equivalent object for a hard link */ -}; - -/* Spare structure for YAFFS1 */ -struct yaffs_spare { - u8 tb0; - u8 tb1; - u8 tb2; - u8 tb3; - u8 page_status; /* set to 0 to delete the chunk */ - u8 block_status; - u8 tb4; - u8 tb5; - u8 ecc1[3]; - u8 tb6; - u8 tb7; - u8 ecc2[3]; -}; - -/*Special structure for passing through to mtd */ -struct yaffs_nand_spare { - struct yaffs_spare spare; - int eccres1; - int eccres2; -}; - -/* Block data in RAM */ - -enum yaffs_block_state { - YAFFS_BLOCK_STATE_UNKNOWN = 0, - - YAFFS_BLOCK_STATE_SCANNING, - /* Being scanned */ - - YAFFS_BLOCK_STATE_NEEDS_SCAN, - /* The block might have something on it (ie it is allocating or full, - * perhaps empty) but it needs to be scanned to determine its true - * state. - * This state is only valid during scanning. - * NB We tolerate empty because the pre-scanner might be incapable of - * deciding - * However, if this state is returned on a YAFFS2 device, - * then we expect a sequence number - */ - - YAFFS_BLOCK_STATE_EMPTY, - /* This block is empty */ - - YAFFS_BLOCK_STATE_ALLOCATING, - /* This block is partially allocated. - * At least one page holds valid data. - * This is the one currently being used for page - * allocation. Should never be more than one of these. - * If a block is only partially allocated at mount it is treated as - * full. - */ - - YAFFS_BLOCK_STATE_FULL, - /* All the pages in this block have been allocated. - * If a block was only partially allocated when mounted we treat - * it as fully allocated. - */ - - YAFFS_BLOCK_STATE_DIRTY, - /* The block was full and now all chunks have been deleted. - * Erase me, reuse me. - */ - - YAFFS_BLOCK_STATE_CHECKPOINT, - /* This block is assigned to holding checkpoint data. */ - - YAFFS_BLOCK_STATE_COLLECTING, - /* This block is being garbage collected */ - - YAFFS_BLOCK_STATE_DEAD - /* This block has failed and is not in use */ -}; - -#define YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1) - -struct yaffs_block_info { - - int soft_del_pages:10; /* number of soft deleted pages */ - int pages_in_use:10; /* number of pages in use */ - unsigned block_state:4; /* One of the above block states. */ - /* NB use unsigned because enum is sometimes - * an int */ - u32 needs_retiring:1; /* Data has failed on this block, */ - /*need to get valid data off and retire*/ - u32 skip_erased_check:1;/* Skip the erased check on this block */ - u32 gc_prioritise:1; /* An ECC check or blank check has failed. - Block should be prioritised for GC */ - u32 chunk_error_strikes:3; /* How many times we've had ecc etc - failures on this block and tried to reuse it */ - u32 has_summary:1; /* The block has a summary */ - - u32 has_shrink_hdr:1; /* This block has at least one shrink header */ - u32 seq_number; /* block sequence number for yaffs2 */ - -}; - -/* -------------------------- Object structure -------------------------------*/ -/* This is the object structure as stored on NAND */ - -struct yaffs_obj_hdr { - enum yaffs_obj_type type; - - /* Apply to everything */ - int parent_obj_id; - u16 sum_no_longer_used; /* checksum of name. No longer used */ - YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; - - /* The following apply to all object types except for hard links */ - u32 yst_mode; /* protection */ - - u32 yst_uid; - u32 yst_gid; - u32 yst_atime; - u32 yst_mtime; - u32 yst_ctime; - - /* File size applies to files only */ - u32 file_size_low; - - /* Equivalent object id applies to hard links only. */ - int equiv_id; - - /* Alias is for symlinks only. */ - YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1]; - - u32 yst_rdev; /* stuff for block and char devices (major/min) */ - - u32 win_ctime[2]; - u32 win_atime[2]; - u32 win_mtime[2]; - - u32 inband_shadowed_obj_id; - u32 inband_is_shrink; - - u32 file_size_high; - u32 reserved[1]; - int shadows_obj; /* This object header shadows the - specified object if > 0 */ - - /* is_shrink applies to object headers written when wemake a hole. */ - u32 is_shrink; - -}; - -/*--------------------------- Tnode -------------------------- */ - -struct yaffs_tnode { - struct yaffs_tnode *internal[YAFFS_NTNODES_INTERNAL]; -}; - -/*------------------------ Object -----------------------------*/ -/* An object can be one of: - * - a directory (no data, has children links - * - a regular file (data.... not prunes :->). - * - a symlink [symbolic link] (the alias). - * - a hard link - */ - -struct yaffs_file_var { - loff_t file_size; - loff_t scanned_size; - loff_t shrink_size; - int top_level; - struct yaffs_tnode *top; -}; - -struct yaffs_dir_var { - struct list_head children; /* list of child links */ - struct list_head dirty; /* Entry for list of dirty directories */ -}; - -struct yaffs_symlink_var { - YCHAR *alias; -}; - -struct yaffs_hardlink_var { - struct yaffs_obj *equiv_obj; - u32 equiv_id; -}; - -union yaffs_obj_var { - struct yaffs_file_var file_variant; - struct yaffs_dir_var dir_variant; - struct yaffs_symlink_var symlink_variant; - struct yaffs_hardlink_var hardlink_variant; -}; - -struct yaffs_obj { - u8 deleted:1; /* This should only apply to unlinked files. */ - u8 soft_del:1; /* it has also been soft deleted */ - u8 unlinked:1; /* An unlinked file.*/ - u8 fake:1; /* A fake object has no presence on NAND. */ - u8 rename_allowed:1; /* Some objects cannot be renamed. */ - u8 unlink_allowed:1; - u8 dirty:1; /* the object needs to be written to flash */ - u8 valid:1; /* When the file system is being loaded up, this - * object might be created before the data - * is available - * ie. file data chunks encountered before - * the header. - */ - u8 lazy_loaded:1; /* This object has been lazy loaded and - * is missing some detail */ - - u8 defered_free:1; /* Object is removed from NAND, but is - * still in the inode cache. - * Free of object is defered. - * until the inode is released. - */ - u8 being_created:1; /* This object is still being created - * so skip some verification checks. */ - u8 is_shadowed:1; /* This object is shadowed on the way - * to being renamed. */ - - u8 xattr_known:1; /* We know if this has object has xattribs - * or not. */ - u8 has_xattr:1; /* This object has xattribs. - * Only valid if xattr_known. */ - - u8 serial; /* serial number of chunk in NAND.*/ - u16 sum; /* sum of the name to speed searching */ - - struct yaffs_dev *my_dev; /* The device I'm on */ - - struct list_head hash_link; /* list of objects in hash bucket */ - - struct list_head hard_links; /* hard linked object chain*/ - - /* directory structure stuff */ - /* also used for linking up the free list */ - struct yaffs_obj *parent; - struct list_head siblings; - - /* Where's my object header in NAND? */ - int hdr_chunk; - - int n_data_chunks; /* Number of data chunks for this file. */ - - u32 obj_id; /* the object id value */ - - u32 yst_mode; - - YCHAR short_name[YAFFS_SHORT_NAME_LENGTH + 1]; - -#ifdef CONFIG_YAFFS_WINCE - u32 win_ctime[2]; - u32 win_mtime[2]; - u32 win_atime[2]; -#else - u32 yst_uid; - u32 yst_gid; - u32 yst_atime; - u32 yst_mtime; - u32 yst_ctime; -#endif - - u32 yst_rdev; - - void *my_inode; - - enum yaffs_obj_type variant_type; - - union yaffs_obj_var variant; - -}; - -struct yaffs_obj_bucket { - struct list_head list; - int count; -}; - -/* yaffs_checkpt_obj holds the definition of an object as dumped - * by checkpointing. - */ - -struct yaffs_checkpt_obj { - int struct_type; - u32 obj_id; - u32 parent_id; - int hdr_chunk; - enum yaffs_obj_type variant_type:3; - u8 deleted:1; - u8 soft_del:1; - u8 unlinked:1; - u8 fake:1; - u8 rename_allowed:1; - u8 unlink_allowed:1; - u8 serial; - int n_data_chunks; - loff_t size_or_equiv_obj; -}; - -/*--------------------- Temporary buffers ---------------- - * - * These are chunk-sized working buffers. Each device has a few. - */ - -struct yaffs_buffer { - u8 *buffer; - int in_use; -}; - -/*----------------- Device ---------------------------------*/ - -struct yaffs_param { - const YCHAR *name; - - /* - * Entry parameters set up way early. Yaffs sets up the rest. - * The structure should be zeroed out before use so that unused - * and defualt values are zero. - */ - - int inband_tags; /* Use unband tags */ - u32 total_bytes_per_chunk; /* Should be >= 512, does not need to - be a power of 2 */ - int chunks_per_block; /* does not need to be a power of 2 */ - int spare_bytes_per_chunk; /* spare area size */ - int start_block; /* Start block we're allowed to use */ - int end_block; /* End block we're allowed to use */ - int n_reserved_blocks; /* Tuneable so that we can reduce - * reserved blocks on NOR and RAM. */ - - int n_caches; /* If <= 0, then short op caching is disabled, - * else the number of short op caches. - */ - int use_nand_ecc; /* Flag to decide whether or not to use - * NAND driver ECC on data (yaffs1) */ - int tags_9bytes; /* Use 9 byte tags */ - int no_tags_ecc; /* Flag to decide whether or not to do ECC - * on packed tags (yaffs2) */ - - int is_yaffs2; /* Use yaffs2 mode on this device */ - - int empty_lost_n_found; /* Auto-empty lost+found directory on mount */ - - int refresh_period; /* How often to check for a block refresh */ - - /* Checkpoint control. Can be set before or after initialisation */ - u8 skip_checkpt_rd; - u8 skip_checkpt_wr; - - int enable_xattr; /* Enable xattribs */ - - /* NAND access functions (Must be set before calling YAFFS) */ - - int (*write_chunk_fn) (struct yaffs_dev *dev, - int nand_chunk, const u8 *data, - const struct yaffs_spare *spare); - int (*read_chunk_fn) (struct yaffs_dev *dev, - int nand_chunk, u8 *data, - struct yaffs_spare *spare); - int (*erase_fn) (struct yaffs_dev *dev, int flash_block); - int (*initialise_flash_fn) (struct yaffs_dev *dev); - int (*deinitialise_flash_fn) (struct yaffs_dev *dev); - - /* yaffs2 mode functions */ - int (*write_chunk_tags_fn) (struct yaffs_dev *dev, - int nand_chunk, const u8 *data, - const struct yaffs_ext_tags *tags); - int (*read_chunk_tags_fn) (struct yaffs_dev *dev, - int nand_chunk, u8 *data, - struct yaffs_ext_tags *tags); - int (*bad_block_fn) (struct yaffs_dev *dev, int block_no); - int (*query_block_fn) (struct yaffs_dev *dev, int block_no, - enum yaffs_block_state *state, - u32 *seq_number); - - /* The remove_obj_fn function must be supplied by OS flavours that - * need it. - * yaffs direct uses it to implement the faster readdir. - * Linux uses it to protect the directory during unlocking. - */ - void (*remove_obj_fn) (struct yaffs_obj *obj); - - /* Callback to mark the superblock dirty */ - void (*sb_dirty_fn) (struct yaffs_dev *dev); - - /* Callback to control garbage collection. */ - unsigned (*gc_control) (struct yaffs_dev *dev); - - /* Debug control flags. Don't use unless you know what you're doing */ - int use_header_file_size; /* Flag to determine if we should use - * file sizes from the header */ - int disable_lazy_load; /* Disable lazy loading on this device */ - int wide_tnodes_disabled; /* Set to disable wide tnodes */ - int disable_soft_del; /* yaffs 1 only: Set to disable the use of - * softdeletion. */ - - int defered_dir_update; /* Set to defer directory updates */ - -#ifdef CONFIG_YAFFS_AUTO_UNICODE - int auto_unicode; -#endif - int always_check_erased; /* Force chunk erased check always on */ - - int disable_summary; - - int max_objects; /* - * Set to limit the number of objects created. - * 0 = no limit. - */ -}; - -struct yaffs_dev { - struct yaffs_param param; - - /* Context storage. Holds extra OS specific data for this device */ - - void *os_context; - void *driver_context; - - struct list_head dev_list; - - /* Runtime parameters. Set up by YAFFS. */ - int data_bytes_per_chunk; - - /* Non-wide tnode stuff */ - u16 chunk_grp_bits; /* Number of bits that need to be resolved if - * the tnodes are not wide enough. - */ - u16 chunk_grp_size; /* == 2^^chunk_grp_bits */ - - /* Stuff to support wide tnodes */ - u32 tnode_width; - u32 tnode_mask; - u32 tnode_size; - - /* Stuff for figuring out file offset to chunk conversions */ - u32 chunk_shift; /* Shift value */ - u32 chunk_div; /* Divisor after shifting: 1 for 2^n sizes */ - u32 chunk_mask; /* Mask to use for power-of-2 case */ - - int is_mounted; - int read_only; - int is_checkpointed; - - /* Stuff to support block offsetting to support start block zero */ - int internal_start_block; - int internal_end_block; - int block_offset; - int chunk_offset; - - /* Runtime checkpointing stuff */ - int checkpt_page_seq; /* running sequence number of checkpt pages */ - int checkpt_byte_count; - int checkpt_byte_offs; - u8 *checkpt_buffer; - int checkpt_open_write; - int blocks_in_checkpt; - int checkpt_cur_chunk; - int checkpt_cur_block; - int checkpt_next_block; - int *checkpt_block_list; - int checkpt_max_blocks; - u32 checkpt_sum; - u32 checkpt_xor; - - int checkpoint_blocks_required; /* Number of blocks needed to store - * current checkpoint set */ - - /* Block Info */ - struct yaffs_block_info *block_info; - u8 *chunk_bits; /* bitmap of chunks in use */ - unsigned block_info_alt:1; /* allocated using alternative alloc */ - unsigned chunk_bits_alt:1; /* allocated using alternative alloc */ - int chunk_bit_stride; /* Number of bytes of chunk_bits per block. - * Must be consistent with chunks_per_block. - */ - - int n_erased_blocks; - int alloc_block; /* Current block being allocated off */ - u32 alloc_page; - int alloc_block_finder; /* Used to search for next allocation block */ - - /* Object and Tnode memory management */ - void *allocator; - int n_obj; - int n_tnodes; - - int n_hardlinks; - - struct yaffs_obj_bucket obj_bucket[YAFFS_NOBJECT_BUCKETS]; - u32 bucket_finder; - - int n_free_chunks; - - /* Garbage collection control */ - u32 *gc_cleanup_list; /* objects to delete at the end of a GC. */ - u32 n_clean_ups; - - unsigned has_pending_prioritised_gc; /* We think this device might - have pending prioritised gcs */ - unsigned gc_disable; - unsigned gc_block_finder; - unsigned gc_dirtiest; - unsigned gc_pages_in_use; - unsigned gc_not_done; - unsigned gc_block; - unsigned gc_chunk; - unsigned gc_skip; - struct yaffs_summary_tags *gc_sum_tags; - - /* Special directories */ - struct yaffs_obj *root_dir; - struct yaffs_obj *lost_n_found; - - int buffered_block; /* Which block is buffered here? */ - int doing_buffered_block_rewrite; - - struct yaffs_cache *cache; - int cache_last_use; - - /* Stuff for background deletion and unlinked files. */ - struct yaffs_obj *unlinked_dir; /* Directory where unlinked and deleted - files live. */ - struct yaffs_obj *del_dir; /* Directory where deleted objects are - sent to disappear. */ - struct yaffs_obj *unlinked_deletion; /* Current file being - background deleted. */ - int n_deleted_files; /* Count of files awaiting deletion; */ - int n_unlinked_files; /* Count of unlinked files. */ - int n_bg_deletions; /* Count of background deletions. */ - - /* Temporary buffer management */ - struct yaffs_buffer temp_buffer[YAFFS_N_TEMP_BUFFERS]; - int max_temp; - int temp_in_use; - int unmanaged_buffer_allocs; - int unmanaged_buffer_deallocs; - - /* yaffs2 runtime stuff */ - unsigned seq_number; /* Sequence number of currently - allocating block */ - unsigned oldest_dirty_seq; - unsigned oldest_dirty_block; - - /* Block refreshing */ - int refresh_skip; /* A skip down counter. - * Refresh happens when this gets to zero. */ - - /* Dirty directory handling */ - struct list_head dirty_dirs; /* List of dirty directories */ - - /* Summary */ - int chunks_per_summary; - struct yaffs_summary_tags *sum_tags; - - /* Statistics */ - u32 n_page_writes; - u32 n_page_reads; - u32 n_erasures; - u32 n_erase_failures; - u32 n_gc_copies; - u32 all_gcs; - u32 passive_gc_count; - u32 oldest_dirty_gc_count; - u32 n_gc_blocks; - u32 bg_gcs; - u32 n_retried_writes; - u32 n_retired_blocks; - u32 n_ecc_fixed; - u32 n_ecc_unfixed; - u32 n_tags_ecc_fixed; - u32 n_tags_ecc_unfixed; - u32 n_deletions; - u32 n_unmarked_deletions; - u32 refresh_count; - u32 cache_hits; - u32 tags_used; - u32 summary_used; - -}; - -/* The CheckpointDevice structure holds the device information that changes - *at runtime and must be preserved over unmount/mount cycles. - */ -struct yaffs_checkpt_dev { - int struct_type; - int n_erased_blocks; - int alloc_block; /* Current block being allocated off */ - u32 alloc_page; - int n_free_chunks; - - int n_deleted_files; /* Count of files awaiting deletion; */ - int n_unlinked_files; /* Count of unlinked files. */ - int n_bg_deletions; /* Count of background deletions. */ - - /* yaffs2 runtime stuff */ - unsigned seq_number; /* Sequence number of currently - * allocating block */ - -}; - -struct yaffs_checkpt_validity { - int struct_type; - u32 magic; - u32 version; - u32 head; -}; - -struct yaffs_shadow_fixer { - int obj_id; - int shadowed_id; - struct yaffs_shadow_fixer *next; -}; - -/* Structure for doing xattr modifications */ -struct yaffs_xattr_mod { - int set; /* If 0 then this is a deletion */ - const YCHAR *name; - const void *data; - int size; - int flags; - int result; -}; - -/*----------------------- YAFFS Functions -----------------------*/ - -int yaffs_guts_initialise(struct yaffs_dev *dev); -void yaffs_deinitialise(struct yaffs_dev *dev); - -int yaffs_get_n_free_chunks(struct yaffs_dev *dev); - -int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR * old_name, - struct yaffs_obj *new_dir, const YCHAR * new_name); - -int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR * name); -int yaffs_del_obj(struct yaffs_obj *obj); - -int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR * name, int buffer_size); -loff_t yaffs_get_obj_length(struct yaffs_obj *obj); -int yaffs_get_obj_inode(struct yaffs_obj *obj); -unsigned yaffs_get_obj_type(struct yaffs_obj *obj); -int yaffs_get_obj_link_count(struct yaffs_obj *obj); - -/* File operations */ -int yaffs_file_rd(struct yaffs_obj *obj, u8 * buffer, loff_t offset, - int n_bytes); -int yaffs_wr_file(struct yaffs_obj *obj, const u8 * buffer, loff_t offset, - int n_bytes, int write_trhrough); -int yaffs_resize_file(struct yaffs_obj *obj, loff_t new_size); - -struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent, - const YCHAR *name, u32 mode, u32 uid, - u32 gid); - -int yaffs_flush_file(struct yaffs_obj *obj, int update_time, int data_sync); - -/* Flushing and checkpointing */ -void yaffs_flush_whole_cache(struct yaffs_dev *dev); - -int yaffs_checkpoint_save(struct yaffs_dev *dev); -int yaffs_checkpoint_restore(struct yaffs_dev *dev); - -/* Directory operations */ -struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR *name, - u32 mode, u32 uid, u32 gid); -struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *the_dir, - const YCHAR *name); -struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number); - -/* Link operations */ -struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR *name, - struct yaffs_obj *equiv_obj); - -struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj); - -/* Symlink operations */ -struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent, - const YCHAR *name, u32 mode, u32 uid, - u32 gid, const YCHAR *alias); -YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj); - -/* Special inodes (fifos, sockets and devices) */ -struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent, - const YCHAR *name, u32 mode, u32 uid, - u32 gid, u32 rdev); - -int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR *name, - const void *value, int size, int flags); -int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR *name, void *value, - int size); -int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size); -int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR *name); - -/* Special directories */ -struct yaffs_obj *yaffs_root(struct yaffs_dev *dev); -struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev); - -void yaffs_handle_defered_free(struct yaffs_obj *obj); - -void yaffs_update_dirty_dirs(struct yaffs_dev *dev); - -int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency); - -/* Debug dump */ -int yaffs_dump_obj(struct yaffs_obj *obj); - -void yaffs_guts_test(struct yaffs_dev *dev); - -/* A few useful functions to be used within the core files*/ -void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash, - int lyn); -int yaffs_check_ff(u8 *buffer, int n_bytes); -void yaffs_handle_chunk_error(struct yaffs_dev *dev, - struct yaffs_block_info *bi); - -u8 *yaffs_get_temp_buffer(struct yaffs_dev *dev); -void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 *buffer); - -struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev, - int number, - enum yaffs_obj_type type); -int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk, - int nand_chunk, int in_scan); -void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR *name); -void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj, - const struct yaffs_obj_hdr *oh); -void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj); -YCHAR *yaffs_clone_str(const YCHAR *str); -void yaffs_link_fixup(struct yaffs_dev *dev, struct list_head *hard_list); -void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no); -int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name, - int force, int is_shrink, int shadows, - struct yaffs_xattr_mod *xop); -void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id, - int backward_scanning); -int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks); -struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev); -struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev, - struct yaffs_file_var *file_struct, - u32 chunk_id, - struct yaffs_tnode *passed_tn); - -int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset, - int n_bytes, int write_trhrough); -void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size); -void yaffs_skip_rest_of_block(struct yaffs_dev *dev); - -int yaffs_count_free_chunks(struct yaffs_dev *dev); - -struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev, - struct yaffs_file_var *file_struct, - u32 chunk_id); - -u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn, - unsigned pos); - -int yaffs_is_non_empty_dir(struct yaffs_obj *obj); - -void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr, - int *chunk_out, u32 *offset_out); -/* - * Marshalling functions to get loff_t file sizes into aand out of - * object headers. - */ -void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize); -loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh); -loff_t yaffs_max_file_size(struct yaffs_dev *dev); - -#endif diff --git a/fs/yaffs2/yaffs_mtdif.c b/fs/yaffs2/yaffs_mtdif.c deleted file mode 100644 index d4af0a329ee..00000000000 --- a/fs/yaffs2/yaffs_mtdif.c +++ /dev/null @@ -1,159 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* XXX U-BOOT XXX */ - -#include "yportenv.h" - -#include "yaffs_mtdif.h" - -#include <linux/mtd/mtd.h> -#include <linux/types.h> -#include <linux/time.h> -#include <linux/mtd/rawnand.h> - -static inline void translate_spare2oob(const struct yaffs_spare *spare, u8 *oob) -{ - oob[0] = spare->tb0; - oob[1] = spare->tb1; - oob[2] = spare->tb2; - oob[3] = spare->tb3; - oob[4] = spare->tb4; - oob[5] = spare->tb5 & 0x3f; - oob[5] |= spare->block_status == 'Y' ? 0 : 0x80; - oob[5] |= spare->page_status == 0 ? 0 : 0x40; - oob[6] = spare->tb6; - oob[7] = spare->tb7; -} - -static inline void translate_oob2spare(struct yaffs_spare *spare, u8 *oob) -{ - struct yaffs_nand_spare *nspare = (struct yaffs_nand_spare *)spare; - spare->tb0 = oob[0]; - spare->tb1 = oob[1]; - spare->tb2 = oob[2]; - spare->tb3 = oob[3]; - spare->tb4 = oob[4]; - spare->tb5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f; - spare->block_status = oob[5] & 0x80 ? 0xff : 'Y'; - spare->page_status = oob[5] & 0x40 ? 0xff : 0; - spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff; - spare->tb6 = oob[6]; - spare->tb7 = oob[7]; - spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff; - - nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */ -} - -int nandmtd_WriteChunkToNAND(struct yaffs_dev *dev, int chunkInNAND, - const u8 *data, const struct yaffs_spare *spare) -{ - struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context); - struct mtd_oob_ops ops; - size_t dummy; - int retval = 0; - loff_t addr = ((loff_t) chunkInNAND) * dev->data_bytes_per_chunk; - u8 spareAsBytes[8]; /* OOB */ - - if (data && !spare) - retval = mtd_write(mtd, addr, dev->data_bytes_per_chunk, - &dummy, data); - else if (spare) { - if (dev->param.use_nand_ecc) { - translate_spare2oob(spare, spareAsBytes); - ops.mode = MTD_OPS_AUTO_OOB; - ops.ooblen = 8; /* temp hack */ - } else { - ops.mode = MTD_OPS_RAW; - ops.ooblen = YAFFS_BYTES_PER_SPARE; - } - ops.len = data ? dev->data_bytes_per_chunk : ops.ooblen; - ops.datbuf = (u8 *)data; - ops.ooboffs = 0; - ops.oobbuf = spareAsBytes; - retval = mtd_write_oob(mtd, addr, &ops); - } - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} - -int nandmtd_ReadChunkFromNAND(struct yaffs_dev *dev, int chunkInNAND, u8 *data, - struct yaffs_spare *spare) -{ - struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context); - struct mtd_oob_ops ops; - size_t dummy; - int retval = 0; - - loff_t addr = ((loff_t) chunkInNAND) * dev->data_bytes_per_chunk; - u8 spareAsBytes[8]; /* OOB */ - - if (data && !spare) - retval = mtd_read(mtd, addr, dev->data_bytes_per_chunk, - &dummy, data); - else if (spare) { - if (dev->param.use_nand_ecc) { - ops.mode = MTD_OPS_AUTO_OOB; - ops.ooblen = 8; /* temp hack */ - } else { - ops.mode = MTD_OPS_RAW; - ops.ooblen = YAFFS_BYTES_PER_SPARE; - } - ops.len = data ? dev->data_bytes_per_chunk : ops.ooblen; - ops.datbuf = data; - ops.ooboffs = 0; - ops.oobbuf = spareAsBytes; - retval = mtd_read_oob(mtd, addr, &ops); - if (dev->param.use_nand_ecc) - translate_oob2spare(spare, spareAsBytes); - } - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} - -int nandmtd_EraseBlockInNAND(struct yaffs_dev *dev, int blockNumber) -{ - struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context); - __u32 addr = - ((loff_t) blockNumber) * dev->data_bytes_per_chunk - * dev->param.chunks_per_block; - struct erase_info ei; - int retval = 0; - - ei.mtd = mtd; - ei.addr = addr; - ei.len = dev->data_bytes_per_chunk * dev->param.chunks_per_block; - ei.time = 1000; - ei.retries = 2; - ei.priv = (u_long) dev; - - /* Todo finish off the ei if required */ - - retval = mtd_erase(mtd, &ei); - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} - -int nandmtd_InitialiseNAND(struct yaffs_dev *dev) -{ - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_mtdif.h b/fs/yaffs2/yaffs_mtdif.h deleted file mode 100644 index 1a125823b60..00000000000 --- a/fs/yaffs2/yaffs_mtdif.h +++ /dev/null @@ -1,27 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_MTDIF_H__ -#define __YAFFS_MTDIF_H__ - -#include "yaffs_guts.h" - -int nandmtd_WriteChunkToNAND(struct yaffs_dev *dev, int chunkInNAND, - const u8 *data, const struct yaffs_spare *spare); -int nandmtd_ReadChunkFromNAND(struct yaffs_dev *dev, int chunkInNAND, u8 *data, - struct yaffs_spare *spare); -int nandmtd_EraseBlockInNAND(struct yaffs_dev *dev, int blockNumber); -int nandmtd_InitialiseNAND(struct yaffs_dev *dev); -#endif diff --git a/fs/yaffs2/yaffs_mtdif2.c b/fs/yaffs2/yaffs_mtdif2.c deleted file mode 100644 index f21f15bfbd8..00000000000 --- a/fs/yaffs2/yaffs_mtdif2.c +++ /dev/null @@ -1,230 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* mtd interface for YAFFS2 */ - -/* XXX U-BOOT XXX */ -#include <linux/bug.h> -#include <linux/errno.h> - -#include "yportenv.h" -#include "yaffs_trace.h" - -#include "yaffs_mtdif2.h" - -#include <linux/mtd/mtd.h> -#include <linux/types.h> -#include <linux/time.h> - -#include "yaffs_trace.h" -#include "yaffs_packedtags2.h" - -#define yaffs_dev_to_mtd(dev) ((struct mtd_info *)((dev)->driver_context)) -#define yaffs_dev_to_lc(dev) ((struct yaffs_linux_context *)((dev)->os_context)) - -/* NB For use with inband tags.... - * We assume that the data buffer is of size total_bytes_per_chunk so - * that we can also use it to load the tags. - */ -int nandmtd2_write_chunk_tags(struct yaffs_dev *dev, int nand_chunk, - const u8 *data, - const struct yaffs_ext_tags *tags) -{ - struct mtd_info *mtd = yaffs_dev_to_mtd(dev); - struct mtd_oob_ops ops; - - int retval = 0; - loff_t addr; - - struct yaffs_packed_tags2 pt; - - int packed_tags_size = - dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt); - void *packed_tags_ptr = - dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt; - - yaffs_trace(YAFFS_TRACE_MTD, - "nandmtd2_write_chunk_tags chunk %d data %p tags %p", - nand_chunk, data, tags); - - addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk; - - /* For yaffs2 writing there must be both data and tags. - * If we're using inband tags, then the tags are stuffed into - * the end of the data buffer. - */ - if (!data || !tags) - BUG(); - else if (dev->param.inband_tags) { - struct yaffs_packed_tags2_tags_only *pt2tp; - pt2tp = - (struct yaffs_packed_tags2_tags_only *)(data + - dev-> - data_bytes_per_chunk); - yaffs_pack_tags2_tags_only(pt2tp, tags); - } else { - yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc); - } - - ops.mode = MTD_OPS_AUTO_OOB; - ops.ooblen = (dev->param.inband_tags) ? 0 : packed_tags_size; - ops.len = dev->param.total_bytes_per_chunk; - ops.ooboffs = 0; - ops.datbuf = (u8 *) data; - ops.oobbuf = (dev->param.inband_tags) ? NULL : packed_tags_ptr; - retval = mtd_write_oob(mtd, addr, &ops); - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} - -int nandmtd2_read_chunk_tags(struct yaffs_dev *dev, int nand_chunk, - u8 *data, struct yaffs_ext_tags *tags) -{ - struct mtd_info *mtd = yaffs_dev_to_mtd(dev); - u8 local_spare[128]; - struct mtd_oob_ops ops; - size_t dummy; - int retval = 0; - int local_data = 0; - struct yaffs_packed_tags2 pt; - loff_t addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk; - int packed_tags_size = - dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt); - void *packed_tags_ptr = - dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt; - - yaffs_trace(YAFFS_TRACE_MTD, - "nandmtd2_read_chunk_tags chunk %d data %p tags %p", - nand_chunk, data, tags); - - if (dev->param.inband_tags) { - - if (!data) { - local_data = 1; - data = yaffs_get_temp_buffer(dev); - } - - } - - if (dev->param.inband_tags || (data && !tags)) - retval = mtd_read(mtd, addr, dev->param.total_bytes_per_chunk, - &dummy, data); - else if (tags) { - ops.mode = MTD_OPS_AUTO_OOB; - ops.ooblen = packed_tags_size; - ops.len = data ? dev->data_bytes_per_chunk : packed_tags_size; - ops.ooboffs = 0; - ops.datbuf = data; - ops.oobbuf = local_spare; - retval = mtd_read_oob(mtd, addr, &ops); - } - - if (dev->param.inband_tags) { - if (tags) { - struct yaffs_packed_tags2_tags_only *pt2tp; - pt2tp = - (struct yaffs_packed_tags2_tags_only *) - &data[dev->data_bytes_per_chunk]; - yaffs_unpack_tags2_tags_only(tags, pt2tp); - } - } else { - if (tags) { - memcpy(packed_tags_ptr, - local_spare, - packed_tags_size); - yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc); - } - } - - if (local_data) - yaffs_release_temp_buffer(dev, data); - - if (tags && retval == -EBADMSG - && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) { - tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED; - dev->n_ecc_unfixed++; - } - if (tags && retval == -EUCLEAN - && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) { - tags->ecc_result = YAFFS_ECC_RESULT_FIXED; - dev->n_ecc_fixed++; - } - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} - -int nandmtd2_MarkNANDBlockBad(struct yaffs_dev *dev, int blockNo) -{ - struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context); - int retval; - - yaffs_trace(YAFFS_TRACE_MTD, - "nandmtd2_MarkNANDBlockBad %d", blockNo); - - retval = - mtd_block_markbad(mtd, - blockNo * dev->param.chunks_per_block * - dev->data_bytes_per_chunk); - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; - -} - -int nandmtd2_QueryNANDBlock(struct yaffs_dev *dev, int blockNo, - enum yaffs_block_state *state, u32 *sequenceNumber) -{ - struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context); - int retval; - - yaffs_trace(YAFFS_TRACE_MTD, "nandmtd2_QueryNANDBlock %d", blockNo); - retval = - mtd_block_isbad(mtd, - blockNo * dev->param.chunks_per_block * - dev->data_bytes_per_chunk); - - if (retval) { - yaffs_trace(YAFFS_TRACE_MTD, "block is bad"); - - *state = YAFFS_BLOCK_STATE_DEAD; - *sequenceNumber = 0; - } else { - struct yaffs_ext_tags t; - nandmtd2_read_chunk_tags(dev, - blockNo * - dev->param.chunks_per_block, NULL, - &t); - - if (t.chunk_used) { - *sequenceNumber = t.seq_number; - *state = YAFFS_BLOCK_STATE_NEEDS_SCAN; - } else { - *sequenceNumber = 0; - *state = YAFFS_BLOCK_STATE_EMPTY; - } - } - yaffs_trace(YAFFS_TRACE_MTD, "block is bad seq %d state %d", - *sequenceNumber, *state); - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} diff --git a/fs/yaffs2/yaffs_mtdif2.h b/fs/yaffs2/yaffs_mtdif2.h deleted file mode 100644 index 62be1736330..00000000000 --- a/fs/yaffs2/yaffs_mtdif2.h +++ /dev/null @@ -1,30 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_MTDIF2_H__ -#define __YAFFS_MTDIF2_H__ - -#include "yaffs_guts.h" - -int nandmtd2_write_chunk_tags(struct yaffs_dev *dev, int chunkInNAND, - const u8 *data, - const struct yaffs_ext_tags *tags); -int nandmtd2_read_chunk_tags(struct yaffs_dev *dev, int chunkInNAND, - u8 *data, struct yaffs_ext_tags *tags); -int nandmtd2_MarkNANDBlockBad(struct yaffs_dev *dev, int blockNo); -int nandmtd2_QueryNANDBlock(struct yaffs_dev *dev, int blockNo, - enum yaffs_block_state *state, u32 *sequenceNumber); - -#endif diff --git a/fs/yaffs2/yaffs_nameval.c b/fs/yaffs2/yaffs_nameval.c deleted file mode 100644 index a20a3e47cea..00000000000 --- a/fs/yaffs2/yaffs_nameval.c +++ /dev/null @@ -1,208 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* - * This simple implementation of a name-value store assumes a small number of -* values and fits into a small finite buffer. - * - * Each attribute is stored as a record: - * sizeof(int) bytes record size. - * yaffs_strnlen+1 bytes name null terminated. - * nbytes value. - * ---------- - * total size stored in record size - * - * This code has not been tested with unicode yet. - */ - -#include "yaffs_nameval.h" - -#include "yportenv.h" - -static int nval_find(const char *xb, int xb_size, const YCHAR *name, - int *exist_size) -{ - int pos = 0; - int size; - - memcpy(&size, xb, sizeof(int)); - while (size > 0 && (size < xb_size) && (pos + size < xb_size)) { - if (!yaffs_strncmp((YCHAR *) (xb + pos + sizeof(int)), - name, size)) { - if (exist_size) - *exist_size = size; - return pos; - } - pos += size; - if (pos < xb_size - sizeof(int)) - memcpy(&size, xb + pos, sizeof(int)); - else - size = 0; - } - if (exist_size) - *exist_size = 0; - return -ENODATA; -} - -static int nval_used(const char *xb, int xb_size) -{ - int pos = 0; - int size; - - memcpy(&size, xb + pos, sizeof(int)); - while (size > 0 && (size < xb_size) && (pos + size < xb_size)) { - pos += size; - if (pos < xb_size - sizeof(int)) - memcpy(&size, xb + pos, sizeof(int)); - else - size = 0; - } - return pos; -} - -int nval_del(char *xb, int xb_size, const YCHAR *name) -{ - int pos = nval_find(xb, xb_size, name, NULL); - int size; - - if (pos < 0 || pos >= xb_size) - return -ENODATA; - - /* Find size, shift rest over this record, - * then zero out the rest of buffer */ - memcpy(&size, xb + pos, sizeof(int)); - memcpy(xb + pos, xb + pos + size, xb_size - (pos + size)); - memset(xb + (xb_size - size), 0, size); - return 0; -} - -int nval_set(char *xb, int xb_size, const YCHAR *name, const char *buf, - int bsize, int flags) -{ - int pos; - int namelen = yaffs_strnlen(name, xb_size); - int reclen; - int size_exist = 0; - int space; - int start; - - pos = nval_find(xb, xb_size, name, &size_exist); - - if (flags & XATTR_CREATE && pos >= 0) - return -EEXIST; - if (flags & XATTR_REPLACE && pos < 0) - return -ENODATA; - - start = nval_used(xb, xb_size); - space = xb_size - start + size_exist; - - reclen = (sizeof(int) + namelen + 1 + bsize); - - if (reclen > space) - return -ENOSPC; - - if (pos >= 0) { - nval_del(xb, xb_size, name); - start = nval_used(xb, xb_size); - } - - pos = start; - - memcpy(xb + pos, &reclen, sizeof(int)); - pos += sizeof(int); - yaffs_strncpy((YCHAR *) (xb + pos), name, reclen); - pos += (namelen + 1); - memcpy(xb + pos, buf, bsize); - return 0; -} - -int nval_get(const char *xb, int xb_size, const YCHAR * name, char *buf, - int bsize) -{ - int pos = nval_find(xb, xb_size, name, NULL); - int size; - - if (pos >= 0 && pos < xb_size) { - - memcpy(&size, xb + pos, sizeof(int)); - pos += sizeof(int); /* advance past record length */ - size -= sizeof(int); - - /* Advance over name string */ - while (xb[pos] && size > 0 && pos < xb_size) { - pos++; - size--; - } - /*Advance over NUL */ - pos++; - size--; - - /* If bsize is zero then this is a size query. - * Return the size, but don't copy. - */ - if (!bsize) - return size; - - if (size <= bsize) { - memcpy(buf, xb + pos, size); - return size; - } - } - if (pos >= 0) - return -ERANGE; - - return -ENODATA; -} - -int nval_list(const char *xb, int xb_size, char *buf, int bsize) -{ - int pos = 0; - int size; - int name_len; - int ncopied = 0; - int filled = 0; - - memcpy(&size, xb + pos, sizeof(int)); - while (size > sizeof(int) && - size <= xb_size && - (pos + size) < xb_size && - !filled) { - pos += sizeof(int); - size -= sizeof(int); - name_len = yaffs_strnlen((YCHAR *) (xb + pos), size); - if (ncopied + name_len + 1 < bsize) { - memcpy(buf, xb + pos, name_len * sizeof(YCHAR)); - buf += name_len; - *buf = '\0'; - buf++; - if (sizeof(YCHAR) > 1) { - *buf = '\0'; - buf++; - } - ncopied += (name_len + 1); - } else { - filled = 1; - } - pos += size; - if (pos < xb_size - sizeof(int)) - memcpy(&size, xb + pos, sizeof(int)); - else - size = 0; - } - return ncopied; -} - -int nval_hasvalues(const char *xb, int xb_size) -{ - return nval_used(xb, xb_size) > 0; -} diff --git a/fs/yaffs2/yaffs_nameval.h b/fs/yaffs2/yaffs_nameval.h deleted file mode 100644 index 951e64f872b..00000000000 --- a/fs/yaffs2/yaffs_nameval.h +++ /dev/null @@ -1,28 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __NAMEVAL_H__ -#define __NAMEVAL_H__ - -#include "yportenv.h" - -int nval_del(char *xb, int xb_size, const YCHAR * name); -int nval_set(char *xb, int xb_size, const YCHAR * name, const char *buf, - int bsize, int flags); -int nval_get(const char *xb, int xb_size, const YCHAR * name, char *buf, - int bsize); -int nval_list(const char *xb, int xb_size, char *buf, int bsize); -int nval_hasvalues(const char *xb, int xb_size); -#endif diff --git a/fs/yaffs2/yaffs_nand.c b/fs/yaffs2/yaffs_nand.c deleted file mode 100644 index 165d01004d6..00000000000 --- a/fs/yaffs2/yaffs_nand.c +++ /dev/null @@ -1,120 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_nand.h" -#include "yaffs_tagscompat.h" - -#include "yaffs_getblockinfo.h" -#include "yaffs_summary.h" - -int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk, - u8 *buffer, struct yaffs_ext_tags *tags) -{ - int result; - struct yaffs_ext_tags local_tags; - int flash_chunk = nand_chunk - dev->chunk_offset; - - dev->n_page_reads++; - - /* If there are no tags provided use local tags. */ - if (!tags) - tags = &local_tags; - - if (dev->param.read_chunk_tags_fn) - result = - dev->param.read_chunk_tags_fn(dev, flash_chunk, buffer, - tags); - else - result = yaffs_tags_compat_rd(dev, - flash_chunk, buffer, tags); - if (tags && tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) { - - struct yaffs_block_info *bi; - bi = yaffs_get_block_info(dev, - nand_chunk / - dev->param.chunks_per_block); - yaffs_handle_chunk_error(dev, bi); - } - return result; -} - -int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev, - int nand_chunk, - const u8 *buffer, struct yaffs_ext_tags *tags) -{ - int result; - int flash_chunk = nand_chunk - dev->chunk_offset; - - dev->n_page_writes++; - - if (tags) { - tags->seq_number = dev->seq_number; - tags->chunk_used = 1; - yaffs_trace(YAFFS_TRACE_WRITE, - "Writing chunk %d tags %d %d", - nand_chunk, tags->obj_id, tags->chunk_id); - } else { - yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags"); - BUG(); - return YAFFS_FAIL; - } - - if (dev->param.write_chunk_tags_fn) - result = dev->param.write_chunk_tags_fn(dev, flash_chunk, - buffer, tags); - else - result = yaffs_tags_compat_wr(dev, flash_chunk, buffer, tags); - - yaffs_summary_add(dev, tags, nand_chunk); - - return result; -} - -int yaffs_mark_bad(struct yaffs_dev *dev, int block_no) -{ - block_no -= dev->block_offset; - if (dev->param.bad_block_fn) - return dev->param.bad_block_fn(dev, block_no); - - return yaffs_tags_compat_mark_bad(dev, block_no); -} - -int yaffs_query_init_block_state(struct yaffs_dev *dev, - int block_no, - enum yaffs_block_state *state, - u32 *seq_number) -{ - block_no -= dev->block_offset; - if (dev->param.query_block_fn) - return dev->param.query_block_fn(dev, block_no, state, - seq_number); - - return yaffs_tags_compat_query_block(dev, block_no, state, seq_number); -} - -int yaffs_erase_block(struct yaffs_dev *dev, int flash_block) -{ - int result; - - flash_block -= dev->block_offset; - dev->n_erasures++; - result = dev->param.erase_fn(dev, flash_block); - return result; -} - -int yaffs_init_nand(struct yaffs_dev *dev) -{ - if (dev->param.initialise_flash_fn) - return dev->param.initialise_flash_fn(dev); - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_nand.h b/fs/yaffs2/yaffs_nand.h deleted file mode 100644 index 71346627fc0..00000000000 --- a/fs/yaffs2/yaffs_nand.h +++ /dev/null @@ -1,38 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_NAND_H__ -#define __YAFFS_NAND_H__ -#include "yaffs_guts.h" - -int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk, - u8 *buffer, struct yaffs_ext_tags *tags); - -int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev, - int nand_chunk, - const u8 *buffer, struct yaffs_ext_tags *tags); - -int yaffs_mark_bad(struct yaffs_dev *dev, int block_no); - -int yaffs_query_init_block_state(struct yaffs_dev *dev, - int block_no, - enum yaffs_block_state *state, - unsigned *seq_number); - -int yaffs_erase_block(struct yaffs_dev *dev, int flash_block); - -int yaffs_init_nand(struct yaffs_dev *dev); - -#endif diff --git a/fs/yaffs2/yaffs_nandemul2k.h b/fs/yaffs2/yaffs_nandemul2k.h deleted file mode 100644 index cb0c4e64de2..00000000000 --- a/fs/yaffs2/yaffs_nandemul2k.h +++ /dev/null @@ -1,39 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* Interface to emulated NAND functions (2k page size) */ - -#ifndef __YAFFS_NANDEMUL2K_H__ -#define __YAFFS_NANDEMUL2K_H__ - -#include "yaffs_guts.h" - -int nandemul2k_WriteChunkWithTagsToNAND(struct yaffs_dev *dev, - int nand_chunk, const u8 *data, - const struct yaffs_ext_tags *tags); -int nandemul2k_ReadChunkWithTagsFromNAND(struct yaffs_dev *dev, - int nand_chunk, u8 *data, - struct yaffs_ext_tags *tags); -int nandemul2k_MarkNANDBlockBad(struct yaffs_dev *dev, int block_no); -int nandemul2k_QueryNANDBlock(struct yaffs_dev *dev, int block_no, - enum yaffs_block_state *state, u32 *seq_number); -int nandemul2k_EraseBlockInNAND(struct yaffs_dev *dev, - int flash_block); -int nandemul2k_InitialiseNAND(struct yaffs_dev *dev); -int nandemul2k_GetBytesPerChunk(void); -int nandemul2k_GetChunksPerBlock(void); -int nandemul2k_GetNumberOfBlocks(void); - -#endif diff --git a/fs/yaffs2/yaffs_nandif.c b/fs/yaffs2/yaffs_nandif.c deleted file mode 100644 index 632f4275518..00000000000 --- a/fs/yaffs2/yaffs_nandif.c +++ /dev/null @@ -1,246 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yportenv.h" -#include "yaffs_guts.h" -#include <malloc.h> - -#include "yaffs_nandif.h" -#include "yaffs_packedtags2.h" - -#include "yramsim.h" - -#include "yaffs_trace.h" -#include "yaffsfs.h" - -/* NB For use with inband tags.... - * We assume that the data buffer is of size totalBytersPerChunk so that - * we can also use it to load the tags. - */ -int ynandif_WriteChunkWithTagsToNAND(struct yaffs_dev *dev, int nand_chunk, - const u8 *data, - const struct yaffs_ext_tags *tags) -{ - - int retval = 0; - struct yaffs_packed_tags2 pt; - void *spare; - unsigned spareSize = 0; - struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context); - - yaffs_trace(YAFFS_TRACE_MTD, - "nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p", - nand_chunk, data, tags); - - /* For yaffs2 writing there must be both data and tags. - * If we're using inband tags, then the tags are stuffed into - * the end of the data buffer. - */ - - if (dev->param.inband_tags) { - struct yaffs_packed_tags2_tags_only *pt2tp; - - pt2tp = (struct yaffs_packed_tags2_tags_only *) - (data + dev->data_bytes_per_chunk); - yaffs_pack_tags2_tags_only(pt2tp, tags); - spare = NULL; - spareSize = 0; - } else { - yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc); - spare = &pt; - spareSize = sizeof(struct yaffs_packed_tags2); - } - - retval = geometry->writeChunk(dev, nand_chunk, - data, dev->param.total_bytes_per_chunk, - spare, spareSize); - - return retval; -} - -int ynandif_ReadChunkWithTagsFromNAND(struct yaffs_dev *dev, int nand_chunk, - u8 *data, struct yaffs_ext_tags *tags) -{ - struct yaffs_packed_tags2 pt; - int localData = 0; - void *spare = NULL; - unsigned spareSize; - int retval = 0; - int eccStatus; /* 0 = ok, 1 = fixed, -1 = unfixed */ - struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context); - - yaffs_trace(YAFFS_TRACE_MTD, - "nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p", - nand_chunk, data, tags); - - if (!tags) { - spare = NULL; - spareSize = 0; - } else if (dev->param.inband_tags) { - - if (!data) { - localData = 1; - data = yaffs_get_temp_buffer(dev); - } - spare = NULL; - spareSize = 0; - } else { - spare = &pt; - spareSize = sizeof(struct yaffs_packed_tags2); - } - - retval = geometry->readChunk(dev, nand_chunk, - data, - data ? dev->param.total_bytes_per_chunk : 0, - spare, spareSize, - &eccStatus); - - if (dev->param.inband_tags) { - if (tags) { - struct yaffs_packed_tags2_tags_only *pt2tp; - pt2tp = (struct yaffs_packed_tags2_tags_only *) - &data[dev->data_bytes_per_chunk]; - yaffs_unpack_tags2_tags_only(tags, pt2tp); - } - } else { - if (tags) - yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc); - } - - if (tags && tags->chunk_used) { - if (eccStatus < 0 || - tags->ecc_result == YAFFS_ECC_RESULT_UNFIXED) - tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED; - else if (eccStatus > 0 || - tags->ecc_result == YAFFS_ECC_RESULT_FIXED) - tags->ecc_result = YAFFS_ECC_RESULT_FIXED; - else - tags->ecc_result = YAFFS_ECC_RESULT_NO_ERROR; - } - - if (localData) - yaffs_release_temp_buffer(dev, data); - - return retval; -} - -int ynandif_MarkNANDBlockBad(struct yaffs_dev *dev, int blockId) -{ - struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context); - - return geometry->markBlockBad(dev, blockId); -} - -int ynandif_EraseBlockInNAND(struct yaffs_dev *dev, int blockId) -{ - struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context); - - return geometry->eraseBlock(dev, blockId); - -} - -static int ynandif_IsBlockOk(struct yaffs_dev *dev, int blockId) -{ - struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context); - - return geometry->checkBlockOk(dev, blockId); -} - -int ynandif_QueryNANDBlock(struct yaffs_dev *dev, int blockId, - enum yaffs_block_state *state, u32 *seq_number) -{ - unsigned chunkNo; - struct yaffs_ext_tags tags; - - *seq_number = 0; - - chunkNo = blockId * dev->param.chunks_per_block; - - if (!ynandif_IsBlockOk(dev, blockId)) { - *state = YAFFS_BLOCK_STATE_DEAD; - } else { - ynandif_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &tags); - - if (!tags.chunk_used) { - *state = YAFFS_BLOCK_STATE_EMPTY; - } else { - *state = YAFFS_BLOCK_STATE_NEEDS_SCAN; - *seq_number = tags.seq_number; - } - } - - return YAFFS_OK; -} - -int ynandif_InitialiseNAND(struct yaffs_dev *dev) -{ - struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context); - - geometry->initialise(dev); - - return YAFFS_OK; -} - -int ynandif_Deinitialise_flash_fn(struct yaffs_dev *dev) -{ - struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context); - - geometry->deinitialise(dev); - - return YAFFS_OK; -} - -struct yaffs_dev * - yaffs_add_dev_from_geometry(const YCHAR *name, - const struct ynandif_Geometry *geometry) -{ - YCHAR *clonedName = malloc(sizeof(YCHAR) * - (strnlen(name, YAFFS_MAX_NAME_LENGTH)+1)); - struct yaffs_dev *dev = malloc(sizeof(struct yaffs_dev)); - struct yaffs_param *param; - - if (dev && clonedName) { - memset(dev, 0, sizeof(struct yaffs_dev)); - strcpy(clonedName, name); - - param = &dev->param; - - param->name = clonedName; - param->write_chunk_tags_fn = ynandif_WriteChunkWithTagsToNAND; - param->read_chunk_tags_fn = ynandif_ReadChunkWithTagsFromNAND; - param->erase_fn = ynandif_EraseBlockInNAND; - param->initialise_flash_fn = ynandif_InitialiseNAND; - param->query_block_fn = ynandif_QueryNANDBlock; - param->bad_block_fn = ynandif_MarkNANDBlockBad; - param->n_caches = 20; - param->start_block = geometry->start_block; - param->end_block = geometry->end_block; - param->total_bytes_per_chunk = geometry->dataSize; - param->spare_bytes_per_chunk = geometry->spareSize; - param->inband_tags = geometry->inband_tags; - param->chunks_per_block = geometry->pagesPerBlock; - param->use_nand_ecc = geometry->hasECC; - param->is_yaffs2 = geometry->useYaffs2; - param->n_reserved_blocks = 5; - dev->driver_context = (void *)geometry; - - yaffs_add_device(dev); - - return dev; - } - - free(dev); - free(clonedName); - - return NULL; -} diff --git a/fs/yaffs2/yaffs_nandif.h b/fs/yaffs2/yaffs_nandif.h deleted file mode 100644 index 6454cea20a0..00000000000 --- a/fs/yaffs2/yaffs_nandif.h +++ /dev/null @@ -1,63 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YNANDIF_H__ -#define __YNANDIF_H__ - -#include "yaffs_guts.h" - -struct ynandif_Geometry { - unsigned start_block; - unsigned end_block; - unsigned dataSize; - unsigned spareSize; - unsigned pagesPerBlock; - unsigned hasECC; - unsigned inband_tags; - unsigned useYaffs2; - - int (*initialise)(struct yaffs_dev *dev); - int (*deinitialise)(struct yaffs_dev *dev); - - int (*readChunk) (struct yaffs_dev *dev, - unsigned pageId, - unsigned char *data, - unsigned dataLength, - unsigned char *spare, - unsigned spareLength, - int *eccStatus); - /* ECC status is set to 0 for OK, 1 for fixed, -1 for unfixed. */ - - int (*writeChunk)(struct yaffs_dev *dev, - unsigned pageId, - const unsigned char *data, - unsigned dataLength, - const unsigned char *spare, - unsigned spareLength); - - int (*eraseBlock)(struct yaffs_dev *dev, unsigned blockId); - - int (*checkBlockOk)(struct yaffs_dev *dev, unsigned blockId); - int (*markBlockBad)(struct yaffs_dev *dev, unsigned blockId); - - void *privateData; - -}; - -struct yaffs_dev * - yaffs_add_dev_from_geometry(const YCHAR *name, - const struct ynandif_Geometry *geometry); - -#endif diff --git a/fs/yaffs2/yaffs_osglue.h b/fs/yaffs2/yaffs_osglue.h deleted file mode 100644 index c2bb682c92f..00000000000 --- a/fs/yaffs2/yaffs_osglue.h +++ /dev/null @@ -1,38 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* - * Header file for using yaffs in an application via - * a direct interface. - */ - -#ifndef __YAFFS_OSGLUE_H__ -#define __YAFFS_OSGLUE_H__ - -#include "yportenv.h" - -void yaffsfs_Lock(void); -void yaffsfs_Unlock(void); - -u32 yaffsfs_CurrentTime(void); - -void yaffsfs_SetError(int err); - -void *yaffsfs_malloc(size_t size); -void yaffsfs_free(void *ptr); - -void yaffsfs_OSInitialisation(void); - -#endif diff --git a/fs/yaffs2/yaffs_packedtags1.c b/fs/yaffs2/yaffs_packedtags1.c deleted file mode 100644 index dd9a331d8fc..00000000000 --- a/fs/yaffs2/yaffs_packedtags1.c +++ /dev/null @@ -1,56 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_packedtags1.h" -#include "yportenv.h" - -static const u8 all_ff[20] = { - 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, 0xff -}; - -void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt, - const struct yaffs_ext_tags *t) -{ - pt->chunk_id = t->chunk_id; - pt->serial_number = t->serial_number; - pt->n_bytes = t->n_bytes; - pt->obj_id = t->obj_id; - pt->ecc = 0; - pt->deleted = (t->is_deleted) ? 0 : 1; - pt->unused_stuff = 0; - pt->should_be_ff = 0xffffffff; -} - -void yaffs_unpack_tags1(struct yaffs_ext_tags *t, - const struct yaffs_packed_tags1 *pt) -{ - - if (memcmp(all_ff, pt, sizeof(struct yaffs_packed_tags1))) { - t->block_bad = 0; - if (pt->should_be_ff != 0xffffffff) - t->block_bad = 1; - t->chunk_used = 1; - t->obj_id = pt->obj_id; - t->chunk_id = pt->chunk_id; - t->n_bytes = pt->n_bytes; - t->ecc_result = YAFFS_ECC_RESULT_NO_ERROR; - t->is_deleted = (pt->deleted) ? 0 : 1; - t->serial_number = pt->serial_number; - } else { - memset(t, 0, sizeof(struct yaffs_ext_tags)); - } -} diff --git a/fs/yaffs2/yaffs_packedtags1.h b/fs/yaffs2/yaffs_packedtags1.h deleted file mode 100644 index b80f0a5b157..00000000000 --- a/fs/yaffs2/yaffs_packedtags1.h +++ /dev/null @@ -1,39 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* This is used to pack YAFFS1 tags, not YAFFS2 tags. */ - -#ifndef __YAFFS_PACKEDTAGS1_H__ -#define __YAFFS_PACKEDTAGS1_H__ - -#include "yaffs_guts.h" - -struct yaffs_packed_tags1 { - unsigned chunk_id:20; - unsigned serial_number:2; - unsigned n_bytes:10; - unsigned obj_id:18; - unsigned ecc:12; - unsigned deleted:1; - unsigned unused_stuff:1; - unsigned should_be_ff; - -}; - -void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt, - const struct yaffs_ext_tags *t); -void yaffs_unpack_tags1(struct yaffs_ext_tags *t, - const struct yaffs_packed_tags1 *pt); -#endif diff --git a/fs/yaffs2/yaffs_packedtags2.c b/fs/yaffs2/yaffs_packedtags2.c deleted file mode 100644 index e1d18cc33c6..00000000000 --- a/fs/yaffs2/yaffs_packedtags2.c +++ /dev/null @@ -1,197 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_packedtags2.h" -#include "yportenv.h" -#include "yaffs_trace.h" - -/* This code packs a set of extended tags into a binary structure for - * NAND storage - */ - -/* Some of the information is "extra" struff which can be packed in to - * speed scanning - * This is defined by having the EXTRA_HEADER_INFO_FLAG set. - */ - -/* Extra flags applied to chunk_id */ - -#define EXTRA_HEADER_INFO_FLAG 0x80000000 -#define EXTRA_SHRINK_FLAG 0x40000000 -#define EXTRA_SHADOWS_FLAG 0x20000000 -#define EXTRA_SPARE_FLAGS 0x10000000 - -#define ALL_EXTRA_FLAGS 0xf0000000 - -/* Also, the top 4 bits of the object Id are set to the object type. */ -#define EXTRA_OBJECT_TYPE_SHIFT (28) -#define EXTRA_OBJECT_TYPE_MASK ((0x0f) << EXTRA_OBJECT_TYPE_SHIFT) - -static void yaffs_dump_packed_tags2_tags_only( - const struct yaffs_packed_tags2_tags_only *ptt) -{ - yaffs_trace(YAFFS_TRACE_MTD, - "packed tags obj %d chunk %d byte %d seq %d", - ptt->obj_id, ptt->chunk_id, ptt->n_bytes, ptt->seq_number); -} - -static void yaffs_dump_packed_tags2(const struct yaffs_packed_tags2 *pt) -{ - yaffs_dump_packed_tags2_tags_only(&pt->t); -} - -static void yaffs_dump_tags2(const struct yaffs_ext_tags *t) -{ - yaffs_trace(YAFFS_TRACE_MTD, - "ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte %d del %d ser %d seq %d", - t->ecc_result, t->block_bad, t->chunk_used, t->obj_id, - t->chunk_id, t->n_bytes, t->is_deleted, t->serial_number, - t->seq_number); - -} - -static int yaffs_check_tags_extra_packable(const struct yaffs_ext_tags *t) -{ - if (t->chunk_id != 0 || !t->extra_available) - return 0; - - /* Check if the file size is too long to store */ - if (t->extra_obj_type == YAFFS_OBJECT_TYPE_FILE && - (t->extra_file_size >> 31) != 0) - return 0; - return 1; -} - -void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *ptt, - const struct yaffs_ext_tags *t) -{ - ptt->chunk_id = t->chunk_id; - ptt->seq_number = t->seq_number; - ptt->n_bytes = t->n_bytes; - ptt->obj_id = t->obj_id; - - /* Only store extra tags for object headers. - * If it is a file then only store if the file size is short\ - * enough to fit. - */ - if (yaffs_check_tags_extra_packable(t)) { - /* Store the extra header info instead */ - /* We save the parent object in the chunk_id */ - ptt->chunk_id = EXTRA_HEADER_INFO_FLAG | t->extra_parent_id; - if (t->extra_is_shrink) - ptt->chunk_id |= EXTRA_SHRINK_FLAG; - if (t->extra_shadows) - ptt->chunk_id |= EXTRA_SHADOWS_FLAG; - - ptt->obj_id &= ~EXTRA_OBJECT_TYPE_MASK; - ptt->obj_id |= (t->extra_obj_type << EXTRA_OBJECT_TYPE_SHIFT); - - if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK) - ptt->n_bytes = t->extra_equiv_id; - else if (t->extra_obj_type == YAFFS_OBJECT_TYPE_FILE) - ptt->n_bytes = (unsigned) t->extra_file_size; - else - ptt->n_bytes = 0; - } - - yaffs_dump_packed_tags2_tags_only(ptt); - yaffs_dump_tags2(t); -} - -void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt, - const struct yaffs_ext_tags *t, int tags_ecc) -{ - yaffs_pack_tags2_tags_only(&pt->t, t); - - if (tags_ecc) - yaffs_ecc_calc_other((unsigned char *)&pt->t, - sizeof(struct yaffs_packed_tags2_tags_only), - &pt->ecc); -} - -void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t, - struct yaffs_packed_tags2_tags_only *ptt) -{ - memset(t, 0, sizeof(struct yaffs_ext_tags)); - - if (ptt->seq_number == 0xffffffff) - return; - - t->block_bad = 0; - t->chunk_used = 1; - t->obj_id = ptt->obj_id; - t->chunk_id = ptt->chunk_id; - t->n_bytes = ptt->n_bytes; - t->is_deleted = 0; - t->serial_number = 0; - t->seq_number = ptt->seq_number; - - /* Do extra header info stuff */ - if (ptt->chunk_id & EXTRA_HEADER_INFO_FLAG) { - t->chunk_id = 0; - t->n_bytes = 0; - - t->extra_available = 1; - t->extra_parent_id = ptt->chunk_id & (~(ALL_EXTRA_FLAGS)); - t->extra_is_shrink = ptt->chunk_id & EXTRA_SHRINK_FLAG ? 1 : 0; - t->extra_shadows = ptt->chunk_id & EXTRA_SHADOWS_FLAG ? 1 : 0; - t->extra_obj_type = ptt->obj_id >> EXTRA_OBJECT_TYPE_SHIFT; - t->obj_id &= ~EXTRA_OBJECT_TYPE_MASK; - - if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK) - t->extra_equiv_id = ptt->n_bytes; - else - t->extra_file_size = ptt->n_bytes; - } - yaffs_dump_packed_tags2_tags_only(ptt); - yaffs_dump_tags2(t); -} - -void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt, - int tags_ecc) -{ - enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_NO_ERROR; - - if (pt->t.seq_number != 0xffffffff && tags_ecc) { - /* Chunk is in use and we need to do ECC */ - - struct yaffs_ecc_other ecc; - int result; - yaffs_ecc_calc_other((unsigned char *)&pt->t, - sizeof(struct yaffs_packed_tags2_tags_only), - &ecc); - result = - yaffs_ecc_correct_other((unsigned char *)&pt->t, - sizeof(struct yaffs_packed_tags2_tags_only), - &pt->ecc, &ecc); - switch (result) { - case 0: - ecc_result = YAFFS_ECC_RESULT_NO_ERROR; - break; - case 1: - ecc_result = YAFFS_ECC_RESULT_FIXED; - break; - case -1: - ecc_result = YAFFS_ECC_RESULT_UNFIXED; - break; - default: - ecc_result = YAFFS_ECC_RESULT_UNKNOWN; - } - } - yaffs_unpack_tags2_tags_only(t, &pt->t); - - t->ecc_result = ecc_result; - - yaffs_dump_packed_tags2(pt); - yaffs_dump_tags2(t); -} diff --git a/fs/yaffs2/yaffs_packedtags2.h b/fs/yaffs2/yaffs_packedtags2.h deleted file mode 100644 index 675e719460a..00000000000 --- a/fs/yaffs2/yaffs_packedtags2.h +++ /dev/null @@ -1,47 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* This is used to pack YAFFS2 tags, not YAFFS1tags. */ - -#ifndef __YAFFS_PACKEDTAGS2_H__ -#define __YAFFS_PACKEDTAGS2_H__ - -#include "yaffs_guts.h" -#include "yaffs_ecc.h" - -struct yaffs_packed_tags2_tags_only { - unsigned seq_number; - unsigned obj_id; - unsigned chunk_id; - unsigned n_bytes; -}; - -struct yaffs_packed_tags2 { - struct yaffs_packed_tags2_tags_only t; - struct yaffs_ecc_other ecc; -}; - -/* Full packed tags with ECC, used for oob tags */ -void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt, - const struct yaffs_ext_tags *t, int tags_ecc); -void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt, - int tags_ecc); - -/* Only the tags part (no ECC for use with inband tags */ -void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *pt, - const struct yaffs_ext_tags *t); -void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t, - struct yaffs_packed_tags2_tags_only *pt); -#endif diff --git a/fs/yaffs2/yaffs_qsort.c b/fs/yaffs2/yaffs_qsort.c deleted file mode 100644 index 32c767f3599..00000000000 --- a/fs/yaffs2/yaffs_qsort.c +++ /dev/null @@ -1,141 +0,0 @@ -// SPDX-License-Identifier: BSD-3-Clause -/* - * Copyright (c) 1992, 1993 - * The Regents of the University of California. All rights reserved. - */ - -#include "yportenv.h" -#include <sort.h> -/* #include <linux/string.h> */ - -/* - * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function". - */ -#define swapcode(TYPE, parmi, parmj, n) do { \ - long i = (n) / sizeof(TYPE); \ - register TYPE *pi = (TYPE *) (parmi); \ - register TYPE *pj = (TYPE *) (parmj); \ - do { \ - register TYPE t = *pi; \ - *pi++ = *pj; \ - *pj++ = t; \ - } while (--i > 0); \ -} while (0) - -#define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \ - es % sizeof(long) ? 2 : es == sizeof(long) ? 0 : 1; - -static inline void -swapfunc(char *a, char *b, int n, int swaptype) -{ - if (swaptype <= 1) - swapcode(long, a, b, n); - else - swapcode(char, a, b, n); -} - -#define yswap(a, b) do { \ - if (swaptype == 0) { \ - long t = *(long *)(a); \ - *(long *)(a) = *(long *)(b); \ - *(long *)(b) = t; \ - } else \ - swapfunc(a, b, es, swaptype); \ -} while (0) - -#define vecswap(a, b, n) if ((n) > 0) swapfunc(a, b, n, swaptype) - -static inline char * -med3(char *a, char *b, char *c, int (*cmp)(const void *, const void *)) -{ - return cmp(a, b) < 0 ? - (cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a)) - : (cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c)); -} - -#ifndef min -#define min(a, b) (((a) < (b)) ? (a) : (b)) -#endif - -void -yaffs_qsort(void *aa, size_t n, size_t es, - int (*cmp)(const void *, const void *)) -{ - char *pa, *pb, *pc, *pd, *pl, *pm, *pn; - int d, r, swaptype, swap_cnt; - register char *a = aa; - -loop: SWAPINIT(a, es); - swap_cnt = 0; - if (n < 7) { - for (pm = (char *)a + es; pm < (char *) a + n * es; pm += es) - for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0; - pl -= es) - yswap(pl, pl - es); - return; - } - pm = (char *)a + (n / 2) * es; - if (n > 7) { - pl = (char *)a; - pn = (char *)a + (n - 1) * es; - if (n > 40) { - d = (n / 8) * es; - pl = med3(pl, pl + d, pl + 2 * d, cmp); - pm = med3(pm - d, pm, pm + d, cmp); - pn = med3(pn - 2 * d, pn - d, pn, cmp); - } - pm = med3(pl, pm, pn, cmp); - } - yswap(a, pm); - pa = pb = (char *)a + es; - - pc = pd = (char *)a + (n - 1) * es; - for (;;) { - while (pb <= pc && (r = cmp(pb, a)) <= 0) { - if (r == 0) { - swap_cnt = 1; - yswap(pa, pb); - pa += es; - } - pb += es; - } - while (pb <= pc && (r = cmp(pc, a)) >= 0) { - if (r == 0) { - swap_cnt = 1; - yswap(pc, pd); - pd -= es; - } - pc -= es; - } - if (pb > pc) - break; - yswap(pb, pc); - swap_cnt = 1; - pb += es; - pc -= es; - } - if (swap_cnt == 0) { /* Switch to insertion sort */ - for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es) - for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0; - pl -= es) - yswap(pl, pl - es); - return; - } - - pn = (char *)a + n * es; - r = min(pa - (char *)a, pb - pa); - vecswap(a, pb - r, r); - r = min((long)(pd - pc), (long)(pn - pd - es)); - vecswap(pb, pn - r, r); - r = pb - pa; - if (r > es) - yaffs_qsort(a, r / es, es, cmp); - r = pd - pc; - if (r > es) { - /* Iterate rather than recurse to save stack space */ - a = pn - r; - n = r / es; - goto loop; - } -/* yaffs_qsort(pn - r, r / es, es, cmp);*/ -} diff --git a/fs/yaffs2/yaffs_summary.c b/fs/yaffs2/yaffs_summary.c deleted file mode 100644 index 2efd73a0223..00000000000 --- a/fs/yaffs2/yaffs_summary.c +++ /dev/null @@ -1,306 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* Summaries write the useful part of the tags for the chunks in a block into an - * an array which is written to the last n chunks of the block. - * Reading the summaries gives all the tags for the block in one read. Much - * faster. - * - * Chunks holding summaries are marked with tags making it look like - * they are part of a fake file. - * - * The summary could also be used during gc. - * - */ - -#include "yaffs_summary.h" -#include "yaffs_packedtags2.h" -#include "yaffs_nand.h" -#include "yaffs_getblockinfo.h" -#include "yaffs_bitmap.h" -#include <dm/devres.h> - -/* - * The summary is built up in an array of summary tags. - * This gets written to the last one or two (maybe more) chunks in a block. - * A summary header is written as the first part of each chunk of summary data. - * The summary header must match or the summary is rejected. - */ - -/* Summary tags don't need the sequence number because that is redundant. */ -struct yaffs_summary_tags { - unsigned obj_id; - unsigned chunk_id; - unsigned n_bytes; -}; - -/* Summary header */ -struct yaffs_summary_header { - unsigned version; /* Must match current version */ - unsigned block; /* Must be this block */ - unsigned seq; /* Must be this sequence number */ - unsigned sum; /* Just add up all the bytes in the tags */ -}; - -static void yaffs_summary_clear(struct yaffs_dev *dev) -{ - if (!dev->sum_tags) - return; - memset(dev->sum_tags, 0, dev->chunks_per_summary * - sizeof(struct yaffs_summary_tags)); -} - -void yaffs_summary_deinit(struct yaffs_dev *dev) -{ - kfree(dev->sum_tags); - dev->sum_tags = NULL; - kfree(dev->gc_sum_tags); - dev->gc_sum_tags = NULL; - dev->chunks_per_summary = 0; -} - -int yaffs_summary_init(struct yaffs_dev *dev) -{ - int sum_bytes; - int chunks_used; /* Number of chunks used by summary */ - int sum_tags_bytes; - - sum_bytes = dev->param.chunks_per_block * - sizeof(struct yaffs_summary_tags); - - chunks_used = (sum_bytes + dev->data_bytes_per_chunk - 1)/ - (dev->data_bytes_per_chunk - - sizeof(struct yaffs_summary_header)); - - dev->chunks_per_summary = dev->param.chunks_per_block - chunks_used; - sum_tags_bytes = sizeof(struct yaffs_summary_tags) * - dev->chunks_per_summary; - dev->sum_tags = kmalloc(sum_tags_bytes, GFP_NOFS); - dev->gc_sum_tags = kmalloc(sum_tags_bytes, GFP_NOFS); - if (!dev->sum_tags || !dev->gc_sum_tags) { - yaffs_summary_deinit(dev); - return YAFFS_FAIL; - } - - yaffs_summary_clear(dev); - - return YAFFS_OK; -} - -static unsigned yaffs_summary_sum(struct yaffs_dev *dev) -{ - u8 *sum_buffer = (u8 *)dev->sum_tags; - int i; - unsigned sum = 0; - - i = sizeof(struct yaffs_summary_tags) * - dev->chunks_per_summary; - while (i > 0) { - sum += *sum_buffer; - sum_buffer++; - i--; - } - - return sum; -} - -static int yaffs_summary_write(struct yaffs_dev *dev, int blk) -{ - struct yaffs_ext_tags tags; - u8 *buffer; - u8 *sum_buffer = (u8 *)dev->sum_tags; - int n_bytes; - int chunk_in_nand; - int chunk_in_block; - int result; - int this_tx; - struct yaffs_summary_header hdr; - int sum_bytes_per_chunk = dev->data_bytes_per_chunk - sizeof(hdr); - struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk); - - buffer = yaffs_get_temp_buffer(dev); - n_bytes = sizeof(struct yaffs_summary_tags) * - dev->chunks_per_summary; - memset(&tags, 0, sizeof(struct yaffs_ext_tags)); - tags.obj_id = YAFFS_OBJECTID_SUMMARY; - tags.chunk_id = 1; - chunk_in_block = dev->chunks_per_summary; - chunk_in_nand = dev->alloc_block * dev->param.chunks_per_block + - dev->chunks_per_summary; - hdr.version = YAFFS_SUMMARY_VERSION; - hdr.block = blk; - hdr.seq = bi->seq_number; - hdr.sum = yaffs_summary_sum(dev); - - do { - this_tx = n_bytes; - if (this_tx > sum_bytes_per_chunk) - this_tx = sum_bytes_per_chunk; - memcpy(buffer, &hdr, sizeof(hdr)); - memcpy(buffer + sizeof(hdr), sum_buffer, this_tx); - tags.n_bytes = this_tx + sizeof(hdr); - result = yaffs_wr_chunk_tags_nand(dev, chunk_in_nand, - buffer, &tags); - - if (result != YAFFS_OK) - break; - yaffs_set_chunk_bit(dev, blk, chunk_in_block); - bi->pages_in_use++; - dev->n_free_chunks--; - - n_bytes -= this_tx; - sum_buffer += this_tx; - chunk_in_nand++; - chunk_in_block++; - tags.chunk_id++; - } while (result == YAFFS_OK && n_bytes > 0); - yaffs_release_temp_buffer(dev, buffer); - - if (result == YAFFS_OK) - bi->has_summary = 1; - - return result; -} - -int yaffs_summary_read(struct yaffs_dev *dev, - struct yaffs_summary_tags *st, - int blk) -{ - struct yaffs_ext_tags tags; - u8 *buffer; - u8 *sum_buffer = (u8 *)st; - int n_bytes; - int chunk_id; - int chunk_in_nand; - int chunk_in_block; - int result; - int this_tx; - struct yaffs_summary_header hdr; - struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk); - int sum_bytes_per_chunk = dev->data_bytes_per_chunk - sizeof(hdr); - - buffer = yaffs_get_temp_buffer(dev); - n_bytes = sizeof(struct yaffs_summary_tags) * dev->chunks_per_summary; - chunk_in_block = dev->chunks_per_summary; - chunk_in_nand = blk * dev->param.chunks_per_block + - dev->chunks_per_summary; - chunk_id = 1; - do { - this_tx = n_bytes; - if (this_tx > sum_bytes_per_chunk) - this_tx = sum_bytes_per_chunk; - result = yaffs_rd_chunk_tags_nand(dev, chunk_in_nand, - buffer, &tags); - - if (tags.chunk_id != chunk_id || - tags.obj_id != YAFFS_OBJECTID_SUMMARY || - tags.chunk_used == 0 || - tags.ecc_result > YAFFS_ECC_RESULT_FIXED || - tags.n_bytes != (this_tx + sizeof(hdr))) - result = YAFFS_FAIL; - if (result != YAFFS_OK) - break; - - if (st == dev->sum_tags) { - /* If we're scanning then update the block info */ - yaffs_set_chunk_bit(dev, blk, chunk_in_block); - bi->pages_in_use++; - } - memcpy(&hdr, buffer, sizeof(hdr)); - memcpy(sum_buffer, buffer + sizeof(hdr), this_tx); - n_bytes -= this_tx; - sum_buffer += this_tx; - chunk_in_nand++; - chunk_in_block++; - chunk_id++; - } while (result == YAFFS_OK && n_bytes > 0); - yaffs_release_temp_buffer(dev, buffer); - - if (result == YAFFS_OK) { - /* Verify header */ - if (hdr.version != YAFFS_SUMMARY_VERSION || - hdr.seq != bi->seq_number || - hdr.sum != yaffs_summary_sum(dev)) - result = YAFFS_FAIL; - } - - if (st == dev->sum_tags && result == YAFFS_OK) - bi->has_summary = 1; - - return result; -} - -int yaffs_summary_add(struct yaffs_dev *dev, - struct yaffs_ext_tags *tags, - int chunk_in_nand) -{ - struct yaffs_packed_tags2_tags_only tags_only; - struct yaffs_summary_tags *sum_tags; - int block_in_nand = chunk_in_nand / dev->param.chunks_per_block; - int chunk_in_block = chunk_in_nand % dev->param.chunks_per_block; - - if (!dev->sum_tags) - return YAFFS_OK; - - if (chunk_in_block >= 0 && chunk_in_block < dev->chunks_per_summary) { - yaffs_pack_tags2_tags_only(&tags_only, tags); - sum_tags = &dev->sum_tags[chunk_in_block]; - sum_tags->chunk_id = tags_only.chunk_id; - sum_tags->n_bytes = tags_only.n_bytes; - sum_tags->obj_id = tags_only.obj_id; - - if (chunk_in_block == dev->chunks_per_summary - 1) { - /* Time to write out the summary */ - yaffs_summary_write(dev, block_in_nand); - yaffs_summary_clear(dev); - yaffs_skip_rest_of_block(dev); - } - } - return YAFFS_OK; -} - -int yaffs_summary_fetch(struct yaffs_dev *dev, - struct yaffs_ext_tags *tags, - int chunk_in_block) -{ - struct yaffs_packed_tags2_tags_only tags_only; - struct yaffs_summary_tags *sum_tags; - if (chunk_in_block >= 0 && chunk_in_block < dev->chunks_per_summary) { - sum_tags = &dev->sum_tags[chunk_in_block]; - tags_only.chunk_id = sum_tags->chunk_id; - tags_only.n_bytes = sum_tags->n_bytes; - tags_only.obj_id = sum_tags->obj_id; - yaffs_unpack_tags2_tags_only(tags, &tags_only); - return YAFFS_OK; - } - return YAFFS_FAIL; -} - -void yaffs_summary_gc(struct yaffs_dev *dev, int blk) -{ - struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk); - int i; - - if (!bi->has_summary) - return; - - for (i = dev->chunks_per_summary; - i < dev->param.chunks_per_block; - i++) { - if (yaffs_check_chunk_bit(dev, blk, i)) { - yaffs_clear_chunk_bit(dev, blk, i); - bi->pages_in_use--; - dev->n_free_chunks++; - } - } -} diff --git a/fs/yaffs2/yaffs_summary.h b/fs/yaffs2/yaffs_summary.h deleted file mode 100644 index e2e027b9257..00000000000 --- a/fs/yaffs2/yaffs_summary.h +++ /dev/null @@ -1,35 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_SUMMARY_H__ -#define __YAFFS_SUMMARY_H__ - -#include "yaffs_packedtags2.h" - -int yaffs_summary_init(struct yaffs_dev *dev); -void yaffs_summary_deinit(struct yaffs_dev *dev); - -int yaffs_summary_add(struct yaffs_dev *dev, - struct yaffs_ext_tags *tags, - int chunk_in_block); -int yaffs_summary_fetch(struct yaffs_dev *dev, - struct yaffs_ext_tags *tags, - int chunk_in_block); -int yaffs_summary_read(struct yaffs_dev *dev, - struct yaffs_summary_tags *st, - int blk); -void yaffs_summary_gc(struct yaffs_dev *dev, int blk); - -#endif diff --git a/fs/yaffs2/yaffs_tagscompat.c b/fs/yaffs2/yaffs_tagscompat.c deleted file mode 100644 index 1a367fe6985..00000000000 --- a/fs/yaffs2/yaffs_tagscompat.c +++ /dev/null @@ -1,406 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_guts.h" -#include "yaffs_tagscompat.h" -#include "yaffs_ecc.h" -#include "yaffs_getblockinfo.h" -#include "yaffs_trace.h" - -static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk); - -/********** Tags ECC calculations *********/ - -void yaffs_calc_ecc(const u8 *data, struct yaffs_spare *spare) -{ - yaffs_ecc_calc(data, spare->ecc1); - yaffs_ecc_calc(&data[256], spare->ecc2); -} - -void yaffs_calc_tags_ecc(struct yaffs_tags *tags) -{ - /* Calculate an ecc */ - unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes; - unsigned i, j; - unsigned ecc = 0; - unsigned bit = 0; - - tags->ecc = 0; - - for (i = 0; i < 8; i++) { - for (j = 1; j & 0xff; j <<= 1) { - bit++; - if (b[i] & j) - ecc ^= bit; - } - } - tags->ecc = ecc; -} - -int yaffs_check_tags_ecc(struct yaffs_tags *tags) -{ - unsigned ecc = tags->ecc; - - yaffs_calc_tags_ecc(tags); - - ecc ^= tags->ecc; - - if (ecc && ecc <= 64) { - /* TODO: Handle the failure better. Retire? */ - unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes; - - ecc--; - - b[ecc / 8] ^= (1 << (ecc & 7)); - - /* Now recvalc the ecc */ - yaffs_calc_tags_ecc(tags); - - return 1; /* recovered error */ - } else if (ecc) { - /* Wierd ecc failure value */ - /* TODO Need to do somethiong here */ - return -1; /* unrecovered error */ - } - return 0; -} - -/********** Tags **********/ - -static void yaffs_load_tags_to_spare(struct yaffs_spare *spare_ptr, - struct yaffs_tags *tags_ptr) -{ - union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr; - - yaffs_calc_tags_ecc(tags_ptr); - - spare_ptr->tb0 = tu->as_bytes[0]; - spare_ptr->tb1 = tu->as_bytes[1]; - spare_ptr->tb2 = tu->as_bytes[2]; - spare_ptr->tb3 = tu->as_bytes[3]; - spare_ptr->tb4 = tu->as_bytes[4]; - spare_ptr->tb5 = tu->as_bytes[5]; - spare_ptr->tb6 = tu->as_bytes[6]; - spare_ptr->tb7 = tu->as_bytes[7]; -} - -static void yaffs_get_tags_from_spare(struct yaffs_dev *dev, - struct yaffs_spare *spare_ptr, - struct yaffs_tags *tags_ptr) -{ - union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr; - int result; - - tu->as_bytes[0] = spare_ptr->tb0; - tu->as_bytes[1] = spare_ptr->tb1; - tu->as_bytes[2] = spare_ptr->tb2; - tu->as_bytes[3] = spare_ptr->tb3; - tu->as_bytes[4] = spare_ptr->tb4; - tu->as_bytes[5] = spare_ptr->tb5; - tu->as_bytes[6] = spare_ptr->tb6; - tu->as_bytes[7] = spare_ptr->tb7; - - result = yaffs_check_tags_ecc(tags_ptr); - if (result > 0) - dev->n_tags_ecc_fixed++; - else if (result < 0) - dev->n_tags_ecc_unfixed++; -} - -static void yaffs_spare_init(struct yaffs_spare *spare) -{ - memset(spare, 0xff, sizeof(struct yaffs_spare)); -} - -static int yaffs_wr_nand(struct yaffs_dev *dev, - int nand_chunk, const u8 *data, - struct yaffs_spare *spare) -{ - if (nand_chunk < dev->param.start_block * dev->param.chunks_per_block) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>> yaffs chunk %d is not valid", - nand_chunk); - return YAFFS_FAIL; - } - - return dev->param.write_chunk_fn(dev, nand_chunk, data, spare); -} - -static int yaffs_rd_chunk_nand(struct yaffs_dev *dev, - int nand_chunk, - u8 *data, - struct yaffs_spare *spare, - enum yaffs_ecc_result *ecc_result, - int correct_errors) -{ - int ret_val; - struct yaffs_spare local_spare; - - if (!spare) { - /* If we don't have a real spare, then we use a local one. */ - /* Need this for the calculation of the ecc */ - spare = &local_spare; - } - - if (!dev->param.use_nand_ecc) { - ret_val = - dev->param.read_chunk_fn(dev, nand_chunk, data, spare); - if (data && correct_errors) { - /* Do ECC correction */ - /* Todo handle any errors */ - int ecc_result1, ecc_result2; - u8 calc_ecc[3]; - - yaffs_ecc_calc(data, calc_ecc); - ecc_result1 = - yaffs_ecc_correct(data, spare->ecc1, calc_ecc); - yaffs_ecc_calc(&data[256], calc_ecc); - ecc_result2 = - yaffs_ecc_correct(&data[256], spare->ecc2, - calc_ecc); - - if (ecc_result1 > 0) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>>yaffs ecc error fix performed on chunk %d:0", - nand_chunk); - dev->n_ecc_fixed++; - } else if (ecc_result1 < 0) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>>yaffs ecc error unfixed on chunk %d:0", - nand_chunk); - dev->n_ecc_unfixed++; - } - - if (ecc_result2 > 0) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>>yaffs ecc error fix performed on chunk %d:1", - nand_chunk); - dev->n_ecc_fixed++; - } else if (ecc_result2 < 0) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>>yaffs ecc error unfixed on chunk %d:1", - nand_chunk); - dev->n_ecc_unfixed++; - } - - if (ecc_result1 || ecc_result2) { - /* We had a data problem on this page */ - yaffs_handle_rd_data_error(dev, nand_chunk); - } - - if (ecc_result1 < 0 || ecc_result2 < 0) - *ecc_result = YAFFS_ECC_RESULT_UNFIXED; - else if (ecc_result1 > 0 || ecc_result2 > 0) - *ecc_result = YAFFS_ECC_RESULT_FIXED; - else - *ecc_result = YAFFS_ECC_RESULT_NO_ERROR; - } - } else { - /* Must allocate enough memory for spare+2*sizeof(int) */ - /* for ecc results from device. */ - struct yaffs_nand_spare nspare; - - memset(&nspare, 0, sizeof(nspare)); - - ret_val = dev->param.read_chunk_fn(dev, nand_chunk, data, - (struct yaffs_spare *) - &nspare); - memcpy(spare, &nspare, sizeof(struct yaffs_spare)); - if (data && correct_errors) { - if (nspare.eccres1 > 0) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>>mtd ecc error fix performed on chunk %d:0", - nand_chunk); - } else if (nspare.eccres1 < 0) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>>mtd ecc error unfixed on chunk %d:0", - nand_chunk); - } - - if (nspare.eccres2 > 0) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>>mtd ecc error fix performed on chunk %d:1", - nand_chunk); - } else if (nspare.eccres2 < 0) { - yaffs_trace(YAFFS_TRACE_ERROR, - "**>>mtd ecc error unfixed on chunk %d:1", - nand_chunk); - } - - if (nspare.eccres1 || nspare.eccres2) { - /* We had a data problem on this page */ - yaffs_handle_rd_data_error(dev, nand_chunk); - } - - if (nspare.eccres1 < 0 || nspare.eccres2 < 0) - *ecc_result = YAFFS_ECC_RESULT_UNFIXED; - else if (nspare.eccres1 > 0 || nspare.eccres2 > 0) - *ecc_result = YAFFS_ECC_RESULT_FIXED; - else - *ecc_result = YAFFS_ECC_RESULT_NO_ERROR; - - } - } - return ret_val; -} - -/* - * Functions for robustisizing - */ - -static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk) -{ - int flash_block = nand_chunk / dev->param.chunks_per_block; - - /* Mark the block for retirement */ - yaffs_get_block_info(dev, flash_block + dev->block_offset)-> - needs_retiring = 1; - yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - "**>>Block %d marked for retirement", - flash_block); - - /* TODO: - * Just do a garbage collection on the affected block - * then retire the block - * NB recursion - */ -} - -int yaffs_tags_compat_wr(struct yaffs_dev *dev, - int nand_chunk, - const u8 *data, const struct yaffs_ext_tags *ext_tags) -{ - struct yaffs_spare spare; - struct yaffs_tags tags; - - yaffs_spare_init(&spare); - - if (ext_tags->is_deleted) - spare.page_status = 0; - else { - tags.obj_id = ext_tags->obj_id; - tags.chunk_id = ext_tags->chunk_id; - - tags.n_bytes_lsb = ext_tags->n_bytes & (1024 - 1); - - if (dev->data_bytes_per_chunk >= 1024) - tags.n_bytes_msb = (ext_tags->n_bytes >> 10) & 3; - else - tags.n_bytes_msb = 3; - - tags.serial_number = ext_tags->serial_number; - - if (!dev->param.use_nand_ecc && data) - yaffs_calc_ecc(data, &spare); - - yaffs_load_tags_to_spare(&spare, &tags); - } - return yaffs_wr_nand(dev, nand_chunk, data, &spare); -} - -int yaffs_tags_compat_rd(struct yaffs_dev *dev, - int nand_chunk, - u8 *data, struct yaffs_ext_tags *ext_tags) -{ - struct yaffs_spare spare; - struct yaffs_tags tags; - enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_UNKNOWN; - static struct yaffs_spare spare_ff; - static int init; - int deleted; - - if (!init) { - memset(&spare_ff, 0xff, sizeof(spare_ff)); - init = 1; - } - - if (!yaffs_rd_chunk_nand(dev, nand_chunk, - data, &spare, &ecc_result, 1)) - return YAFFS_FAIL; - - /* ext_tags may be NULL */ - if (!ext_tags) - return YAFFS_OK; - - deleted = (hweight8(spare.page_status) < 7) ? 1 : 0; - - ext_tags->is_deleted = deleted; - ext_tags->ecc_result = ecc_result; - ext_tags->block_bad = 0; /* We're reading it */ - /* therefore it is not a bad block */ - ext_tags->chunk_used = - memcmp(&spare_ff, &spare, sizeof(spare_ff)) ? 1 : 0; - - if (ext_tags->chunk_used) { - yaffs_get_tags_from_spare(dev, &spare, &tags); - ext_tags->obj_id = tags.obj_id; - ext_tags->chunk_id = tags.chunk_id; - ext_tags->n_bytes = tags.n_bytes_lsb; - - if (dev->data_bytes_per_chunk >= 1024) - ext_tags->n_bytes |= - (((unsigned)tags.n_bytes_msb) << 10); - - ext_tags->serial_number = tags.serial_number; - } - - return YAFFS_OK; -} - -int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int flash_block) -{ - struct yaffs_spare spare; - - memset(&spare, 0xff, sizeof(struct yaffs_spare)); - - spare.block_status = 'Y'; - - yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block, NULL, - &spare); - yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block + 1, - NULL, &spare); - - return YAFFS_OK; -} - -int yaffs_tags_compat_query_block(struct yaffs_dev *dev, - int block_no, - enum yaffs_block_state *state, - u32 *seq_number) -{ - struct yaffs_spare spare0, spare1; - static struct yaffs_spare spare_ff; - static int init; - enum yaffs_ecc_result dummy; - - if (!init) { - memset(&spare_ff, 0xff, sizeof(spare_ff)); - init = 1; - } - - *seq_number = 0; - - yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block, NULL, - &spare0, &dummy, 1); - yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block + 1, - NULL, &spare1, &dummy, 1); - - if (hweight8(spare0.block_status & spare1.block_status) < 7) - *state = YAFFS_BLOCK_STATE_DEAD; - else if (memcmp(&spare_ff, &spare0, sizeof(spare_ff)) == 0) - *state = YAFFS_BLOCK_STATE_EMPTY; - else - *state = YAFFS_BLOCK_STATE_NEEDS_SCAN; - - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_tagscompat.h b/fs/yaffs2/yaffs_tagscompat.h deleted file mode 100644 index b3c66557725..00000000000 --- a/fs/yaffs2/yaffs_tagscompat.h +++ /dev/null @@ -1,36 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_TAGSCOMPAT_H__ -#define __YAFFS_TAGSCOMPAT_H__ - -#include "yaffs_guts.h" -int yaffs_tags_compat_wr(struct yaffs_dev *dev, - int nand_chunk, - const u8 *data, const struct yaffs_ext_tags *tags); -int yaffs_tags_compat_rd(struct yaffs_dev *dev, - int nand_chunk, - u8 *data, struct yaffs_ext_tags *tags); -int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int block_no); -int yaffs_tags_compat_query_block(struct yaffs_dev *dev, - int block_no, - enum yaffs_block_state *state, - u32 *seq_number); - -void yaffs_calc_tags_ecc(struct yaffs_tags *tags); -int yaffs_check_tags_ecc(struct yaffs_tags *tags); -int yaffs_count_bits(u8 byte); - -#endif diff --git a/fs/yaffs2/yaffs_trace.h b/fs/yaffs2/yaffs_trace.h deleted file mode 100644 index fd26054d391..00000000000 --- a/fs/yaffs2/yaffs_trace.h +++ /dev/null @@ -1,57 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YTRACE_H__ -#define __YTRACE_H__ - -extern unsigned int yaffs_trace_mask; -extern unsigned int yaffs_wr_attempts; - -/* - * Tracing flags. - * The flags masked in YAFFS_TRACE_ALWAYS are always traced. - */ - -#define YAFFS_TRACE_OS 0x00000002 -#define YAFFS_TRACE_ALLOCATE 0x00000004 -#define YAFFS_TRACE_SCAN 0x00000008 -#define YAFFS_TRACE_BAD_BLOCKS 0x00000010 -#define YAFFS_TRACE_ERASE 0x00000020 -#define YAFFS_TRACE_GC 0x00000040 -#define YAFFS_TRACE_WRITE 0x00000080 -#define YAFFS_TRACE_TRACING 0x00000100 -#define YAFFS_TRACE_DELETION 0x00000200 -#define YAFFS_TRACE_BUFFERS 0x00000400 -#define YAFFS_TRACE_NANDACCESS 0x00000800 -#define YAFFS_TRACE_GC_DETAIL 0x00001000 -#define YAFFS_TRACE_SCAN_DEBUG 0x00002000 -#define YAFFS_TRACE_MTD 0x00004000 -#define YAFFS_TRACE_CHECKPOINT 0x00008000 - -#define YAFFS_TRACE_VERIFY 0x00010000 -#define YAFFS_TRACE_VERIFY_NAND 0x00020000 -#define YAFFS_TRACE_VERIFY_FULL 0x00040000 -#define YAFFS_TRACE_VERIFY_ALL 0x000f0000 - -#define YAFFS_TRACE_SYNC 0x00100000 -#define YAFFS_TRACE_BACKGROUND 0x00200000 -#define YAFFS_TRACE_LOCK 0x00400000 -#define YAFFS_TRACE_MOUNT 0x00800000 - -#define YAFFS_TRACE_ERROR 0x40000000 -#define YAFFS_TRACE_BUG 0x80000000 -#define YAFFS_TRACE_ALWAYS 0xf0000000 - -#endif diff --git a/fs/yaffs2/yaffs_uboot_glue.c b/fs/yaffs2/yaffs_uboot_glue.c deleted file mode 100644 index c52362b3eda..00000000000 --- a/fs/yaffs2/yaffs_uboot_glue.c +++ /dev/null @@ -1,457 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* - * yaffscfg.c The configuration for the "direct" use of yaffs. - * - * This is set up for u-boot. - * - * This version now uses the ydevconfig mechanism to set up partitions. - */ - -#include <div64.h> -#include <malloc.h> -#include <linux/printk.h> - -#include <config.h> -#include "nand.h" -#include "yaffscfg.h" -#include "yaffsfs.h" -#include "yaffs_packedtags2.h" -#include "yaffs_mtdif.h" -#include "yaffs_mtdif2.h" -#if 0 -#include <errno.h> -#else -#include "malloc.h" -#endif -#include <linux/mtd/rawnand.h> - -unsigned yaffs_trace_mask = 0x0; /* Disable logging */ -static int yaffs_errno; - -void yaffs_bug_fn(const char *fn, int n) -{ - printf("yaffs bug at %s:%d\n", fn, n); -} - -void *yaffsfs_malloc(size_t x) -{ - return malloc(x); -} - -void yaffsfs_free(void *x) -{ - free(x); -} - -void yaffsfs_SetError(int err) -{ - yaffs_errno = err; -} - -int yaffsfs_GetLastError(void) -{ - return yaffs_errno; -} - -int yaffsfs_GetError(void) -{ - return yaffs_errno; -} - -void yaffsfs_Lock(void) -{ -} - -void yaffsfs_Unlock(void) -{ -} - -__u32 yaffsfs_CurrentTime(void) -{ - return 0; -} - -void *yaffs_malloc(size_t size) -{ - return malloc(size); -} - -void yaffs_free(void *ptr) -{ - free(ptr); -} - -void yaffsfs_LocalInitialisation(void) -{ - /* No locking used */ -} - -static const char *yaffs_file_type_str(struct yaffs_stat *stat) -{ - switch (stat->st_mode & S_IFMT) { - case S_IFREG: return "regular file"; - case S_IFDIR: return "directory"; - case S_IFLNK: return "symlink"; - default: return "unknown"; - } -} - -static const char *yaffs_error_str(void) -{ - int error = yaffsfs_GetLastError(); - - if (error < 0) - error = -error; - - switch (error) { - case EBUSY: return "Busy"; - case ENODEV: return "No such device"; - case EINVAL: return "Invalid parameter"; - case ENFILE: return "Too many open files"; - case EBADF: return "Bad handle"; - case EACCES: return "Wrong permissions"; - case EXDEV: return "Not on same device"; - case ENOENT: return "No such entry"; - case ENOSPC: return "Device full"; - case EROFS: return "Read only file system"; - case ERANGE: return "Range error"; - case ENOTEMPTY: return "Not empty"; - case ENAMETOOLONG: return "Name too long"; - case ENOMEM: return "Out of memory"; - case EFAULT: return "Fault"; - case EEXIST: return "Name exists"; - case ENOTDIR: return "Not a directory"; - case EISDIR: return "Not permitted on a directory"; - case ELOOP: return "Symlink loop"; - case 0: return "No error"; - default: return "Unknown error"; - } -} - -void cmd_yaffs_tracemask(unsigned set, unsigned mask) -{ - if (set) - yaffs_trace_mask = mask; - - printf("yaffs trace mask: %08x\n", yaffs_trace_mask); -} - -static int yaffs_regions_overlap(int a, int b, int x, int y) -{ - return (a <= x && x <= b) || - (a <= y && y <= b) || - (x <= a && a <= y) || - (x <= b && b <= y); -} - -void cmd_yaffs_devconfig(char *_mp, int flash_dev, - int start_block, int end_block) -{ - struct mtd_info *mtd = NULL; - struct yaffs_dev *dev = NULL; - struct yaffs_dev *chk; - char *mp = NULL; - struct nand_chip *chip; - - mtd = get_nand_dev_by_index(flash_dev); - if (!mtd) { - pr_err("\nno NAND devices available\n"); - return; - } - - dev = calloc(1, sizeof(*dev)); - mp = strdup(_mp); - - if (!dev || !mp) { - /* Alloc error */ - printf("Failed to allocate memory\n"); - goto err; - } - - if (flash_dev >= CONFIG_SYS_MAX_NAND_DEVICE) { - printf("Flash device invalid\n"); - goto err; - } - - if (end_block == 0) - end_block = lldiv(mtd->size, mtd->erasesize - 1); - - if (end_block < start_block) { - printf("Bad start/end\n"); - goto err; - } - - chip = mtd_to_nand(mtd); - - /* Check for any conflicts */ - yaffs_dev_rewind(); - while (1) { - chk = yaffs_next_dev(); - if (!chk) - break; - if (strcmp(chk->param.name, mp) == 0) { - printf("Mount point name already used\n"); - goto err; - } - if (chk->driver_context == mtd && - yaffs_regions_overlap( - chk->param.start_block, chk->param.end_block, - start_block, end_block)) { - printf("Region overlaps with partition %s\n", - chk->param.name); - goto err; - } - - } - - /* Seems sane, so configure */ - memset(dev, 0, sizeof(*dev)); - dev->param.name = mp; - dev->driver_context = mtd; - dev->param.start_block = start_block; - dev->param.end_block = end_block; - dev->param.chunks_per_block = mtd->erasesize / mtd->writesize; - dev->param.total_bytes_per_chunk = mtd->writesize; - dev->param.is_yaffs2 = 1; - dev->param.use_nand_ecc = 1; - dev->param.n_reserved_blocks = 5; - if (chip->ecc.layout->oobavail < sizeof(struct yaffs_packed_tags2)) - dev->param.inband_tags = 1; - dev->param.n_caches = 10; - dev->param.write_chunk_tags_fn = nandmtd2_write_chunk_tags; - dev->param.read_chunk_tags_fn = nandmtd2_read_chunk_tags; - dev->param.erase_fn = nandmtd_EraseBlockInNAND; - dev->param.initialise_flash_fn = nandmtd_InitialiseNAND; - dev->param.bad_block_fn = nandmtd2_MarkNANDBlockBad; - dev->param.query_block_fn = nandmtd2_QueryNANDBlock; - - yaffs_add_device(dev); - - printf("Configures yaffs mount %s: dev %d start block %d, end block %d %s\n", - mp, flash_dev, start_block, end_block, - dev->param.inband_tags ? "using inband tags" : ""); - return; - -err: - free(dev); - free(mp); -} - -void cmd_yaffs_dev_ls(void) -{ - struct yaffs_dev *dev; - int flash_dev; - int free_space; - - yaffs_dev_rewind(); - - while (1) { - dev = yaffs_next_dev(); - if (!dev) - return; - flash_dev = nand_mtd_to_devnum(dev->driver_context); - printf("%-10s %5d 0x%05x 0x%05x %s", - dev->param.name, flash_dev, - dev->param.start_block, dev->param.end_block, - dev->param.inband_tags ? "using inband tags, " : ""); - - free_space = yaffs_freespace(dev->param.name); - if (free_space < 0) - printf("not mounted\n"); - else - printf("free 0x%x\n", free_space); - - } -} - -void make_a_file(char *yaffsName, char bval, int sizeOfFile) -{ - int outh; - int i; - unsigned char buffer[100]; - - outh = yaffs_open(yaffsName, - O_CREAT | O_RDWR | O_TRUNC, - S_IREAD | S_IWRITE); - if (outh < 0) { - printf("Error opening file: %d. %s\n", outh, yaffs_error_str()); - return; - } - - memset(buffer, bval, 100); - - do { - i = sizeOfFile; - if (i > 100) - i = 100; - sizeOfFile -= i; - - yaffs_write(outh, buffer, i); - - } while (sizeOfFile > 0); - - yaffs_close(outh); -} - -void read_a_file(char *fn) -{ - int h; - int i = 0; - unsigned char b; - - h = yaffs_open(fn, O_RDWR, 0); - if (h < 0) { - printf("File not found\n"); - return; - } - - while (yaffs_read(h, &b, 1) > 0) { - printf("%02x ", b); - i++; - if (i > 32) { - printf("\n"); - i = 0; - } - } - printf("\n"); - yaffs_close(h); -} - -void cmd_yaffs_mount(char *mp) -{ - int retval = yaffs_mount(mp); - if (retval < 0) - printf("Error mounting %s, return value: %d, %s\n", mp, - yaffsfs_GetError(), yaffs_error_str()); -} - -void cmd_yaffs_umount(char *mp) -{ - if (yaffs_unmount(mp) == -1) - printf("Error umounting %s, return value: %d, %s\n", mp, - yaffsfs_GetError(), yaffs_error_str()); -} - -void cmd_yaffs_write_file(char *yaffsName, char bval, int sizeOfFile) -{ - make_a_file(yaffsName, bval, sizeOfFile); -} - -void cmd_yaffs_read_file(char *fn) -{ - read_a_file(fn); -} - -void cmd_yaffs_mread_file(char *fn, char *addr) -{ - int h; - struct yaffs_stat s; - - yaffs_stat(fn, &s); - - printf("Copy %s to 0x%p... ", fn, addr); - h = yaffs_open(fn, O_RDWR, 0); - if (h < 0) { - printf("File not found\n"); - return; - } - - yaffs_read(h, addr, (int)s.st_size); - printf("\t[DONE]\n"); - - yaffs_close(h); -} - -void cmd_yaffs_mwrite_file(char *fn, char *addr, int size) -{ - int outh; - - outh = yaffs_open(fn, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE); - if (outh < 0) - printf("Error opening file: %d, %s\n", outh, yaffs_error_str()); - - yaffs_write(outh, addr, size); - - yaffs_close(outh); -} - -void cmd_yaffs_ls(const char *mountpt, int longlist) -{ - int i; - yaffs_DIR *d; - struct yaffs_dirent *de; - struct yaffs_stat stat; - char tempstr[255]; - - d = yaffs_opendir(mountpt); - - if (!d) { - printf("opendir failed, %s\n", yaffs_error_str()); - return; - } - - for (i = 0; (de = yaffs_readdir(d)) != NULL; i++) { - if (longlist) { - sprintf(tempstr, "%s/%s", mountpt, de->d_name); - yaffs_lstat(tempstr, &stat); - printf("%-25s\t%7ld", - de->d_name, - (long)stat.st_size); - printf(" %5d %s\n", - stat.st_ino, - yaffs_file_type_str(&stat)); - } else { - printf("%s\n", de->d_name); - } - } - - yaffs_closedir(d); -} - -void cmd_yaffs_mkdir(const char *dir) -{ - int retval = yaffs_mkdir(dir, 0); - - if (retval < 0) - printf("yaffs_mkdir returning error: %d, %s\n", - retval, yaffs_error_str()); -} - -void cmd_yaffs_rmdir(const char *dir) -{ - int retval = yaffs_rmdir(dir); - - if (retval < 0) - printf("yaffs_rmdir returning error: %d, %s\n", - retval, yaffs_error_str()); -} - -void cmd_yaffs_rm(const char *path) -{ - int retval = yaffs_unlink(path); - - if (retval < 0) - printf("yaffs_unlink returning error: %d, %s\n", - retval, yaffs_error_str()); -} - -void cmd_yaffs_mv(const char *oldPath, const char *newPath) -{ - int retval = yaffs_rename(newPath, oldPath); - - if (retval < 0) - printf("yaffs_unlink returning error: %d, %s\n", - retval, yaffs_error_str()); -} diff --git a/fs/yaffs2/yaffs_verify.c b/fs/yaffs2/yaffs_verify.c deleted file mode 100644 index f10fe03bc42..00000000000 --- a/fs/yaffs2/yaffs_verify.c +++ /dev/null @@ -1,521 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_verify.h" -#include "yaffs_trace.h" -#include "yaffs_bitmap.h" -#include "yaffs_getblockinfo.h" -#include "yaffs_nand.h" - -int yaffs_skip_verification(struct yaffs_dev *dev) -{ - return !(yaffs_trace_mask & - (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL)); -} - -static int yaffs_skip_full_verification(struct yaffs_dev *dev) -{ - return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_FULL)); -} - -static int yaffs_skip_nand_verification(struct yaffs_dev *dev) -{ - return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_NAND)); -} - -static const char * const block_state_name[] = { - "Unknown", - "Needs scan", - "Scanning", - "Empty", - "Allocating", - "Full", - "Dirty", - "Checkpoint", - "Collecting", - "Dead" -}; - -void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi, int n) -{ - int actually_used; - int in_use; - - if (yaffs_skip_verification(dev)) - return; - - /* Report illegal runtime states */ - if (bi->block_state >= YAFFS_NUMBER_OF_BLOCK_STATES) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Block %d has undefined state %d", - n, bi->block_state); - - switch (bi->block_state) { - case YAFFS_BLOCK_STATE_UNKNOWN: - case YAFFS_BLOCK_STATE_SCANNING: - case YAFFS_BLOCK_STATE_NEEDS_SCAN: - yaffs_trace(YAFFS_TRACE_VERIFY, - "Block %d has bad run-state %s", - n, block_state_name[bi->block_state]); - } - - /* Check pages in use and soft deletions are legal */ - - actually_used = bi->pages_in_use - bi->soft_del_pages; - - if (bi->pages_in_use < 0 || - bi->pages_in_use > dev->param.chunks_per_block || - bi->soft_del_pages < 0 || - bi->soft_del_pages > dev->param.chunks_per_block || - actually_used < 0 || actually_used > dev->param.chunks_per_block) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Block %d has illegal values pages_in_used %d soft_del_pages %d", - n, bi->pages_in_use, bi->soft_del_pages); - - /* Check chunk bitmap legal */ - in_use = yaffs_count_chunk_bits(dev, n); - if (in_use != bi->pages_in_use) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Block %d has inconsistent values pages_in_use %d counted chunk bits %d", - n, bi->pages_in_use, in_use); -} - -void yaffs_verify_collected_blk(struct yaffs_dev *dev, - struct yaffs_block_info *bi, int n) -{ - yaffs_verify_blk(dev, bi, n); - - /* After collection the block should be in the erased state */ - - if (bi->block_state != YAFFS_BLOCK_STATE_COLLECTING && - bi->block_state != YAFFS_BLOCK_STATE_EMPTY) { - yaffs_trace(YAFFS_TRACE_ERROR, - "Block %d is in state %d after gc, should be erased", - n, bi->block_state); - } -} - -void yaffs_verify_blocks(struct yaffs_dev *dev) -{ - int i; - int state_count[YAFFS_NUMBER_OF_BLOCK_STATES]; - int illegal_states = 0; - - if (yaffs_skip_verification(dev)) - return; - - memset(state_count, 0, sizeof(state_count)); - - for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { - struct yaffs_block_info *bi = yaffs_get_block_info(dev, i); - yaffs_verify_blk(dev, bi, i); - - if (bi->block_state < YAFFS_NUMBER_OF_BLOCK_STATES) - state_count[bi->block_state]++; - else - illegal_states++; - } - - yaffs_trace(YAFFS_TRACE_VERIFY, "Block summary"); - - yaffs_trace(YAFFS_TRACE_VERIFY, - "%d blocks have illegal states", - illegal_states); - if (state_count[YAFFS_BLOCK_STATE_ALLOCATING] > 1) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Too many allocating blocks"); - - for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++) - yaffs_trace(YAFFS_TRACE_VERIFY, - "%s %d blocks", - block_state_name[i], state_count[i]); - - if (dev->blocks_in_checkpt != state_count[YAFFS_BLOCK_STATE_CHECKPOINT]) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Checkpoint block count wrong dev %d count %d", - dev->blocks_in_checkpt, - state_count[YAFFS_BLOCK_STATE_CHECKPOINT]); - - if (dev->n_erased_blocks != state_count[YAFFS_BLOCK_STATE_EMPTY]) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Erased block count wrong dev %d count %d", - dev->n_erased_blocks, - state_count[YAFFS_BLOCK_STATE_EMPTY]); - - if (state_count[YAFFS_BLOCK_STATE_COLLECTING] > 1) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Too many collecting blocks %d (max is 1)", - state_count[YAFFS_BLOCK_STATE_COLLECTING]); -} - -/* - * Verify the object header. oh must be valid, but obj and tags may be NULL in - * which case those tests will not be performed. - */ -void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh, - struct yaffs_ext_tags *tags, int parent_check) -{ - if (obj && yaffs_skip_verification(obj->my_dev)) - return; - - if (!(tags && obj && oh)) { - yaffs_trace(YAFFS_TRACE_VERIFY, - "Verifying object header tags %p obj %p oh %p", - tags, obj, oh); - return; - } - - if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN || - oh->type > YAFFS_OBJECT_TYPE_MAX) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d header type is illegal value 0x%x", - tags->obj_id, oh->type); - - if (tags->obj_id != obj->obj_id) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d header mismatch obj_id %d", - tags->obj_id, obj->obj_id); - - /* - * Check that the object's parent ids match if parent_check requested. - * - * Tests do not apply to the root object. - */ - - if (parent_check && tags->obj_id > 1 && !obj->parent) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d header mismatch parent_id %d obj->parent is NULL", - tags->obj_id, oh->parent_obj_id); - - if (parent_check && obj->parent && - oh->parent_obj_id != obj->parent->obj_id && - (oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED || - obj->parent->obj_id != YAFFS_OBJECTID_DELETED)) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d header mismatch parent_id %d parent_obj_id %d", - tags->obj_id, oh->parent_obj_id, - obj->parent->obj_id); - - if (tags->obj_id > 1 && oh->name[0] == 0) /* Null name */ - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d header name is NULL", - obj->obj_id); - - if (tags->obj_id > 1 && ((u8) (oh->name[0])) == 0xff) /* Junk name */ - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d header name is 0xff", - obj->obj_id); -} - -void yaffs_verify_file(struct yaffs_obj *obj) -{ - u32 x; - int required_depth; - int last_chunk; - u32 offset_in_chunk; - u32 the_chunk; - - u32 i; - struct yaffs_dev *dev; - struct yaffs_ext_tags tags; - struct yaffs_tnode *tn; - u32 obj_id; - - if (!obj) - return; - - if (yaffs_skip_verification(obj->my_dev)) - return; - - dev = obj->my_dev; - obj_id = obj->obj_id; - - /* Check file size is consistent with tnode depth */ - yaffs_addr_to_chunk(dev, obj->variant.file_variant.file_size, - &last_chunk, &offset_in_chunk); - last_chunk++; - x = last_chunk >> YAFFS_TNODES_LEVEL0_BITS; - required_depth = 0; - while (x > 0) { - x >>= YAFFS_TNODES_INTERNAL_BITS; - required_depth++; - } - - /* Check that the chunks in the tnode tree are all correct. - * We do this by scanning through the tnode tree and - * checking the tags for every chunk match. - */ - - if (yaffs_skip_nand_verification(dev)) - return; - - for (i = 1; i <= last_chunk; i++) { - tn = yaffs_find_tnode_0(dev, &obj->variant.file_variant, i); - - if (!tn) - continue; - - the_chunk = yaffs_get_group_base(dev, tn, i); - if (the_chunk > 0) { - yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL, - &tags); - if (tags.obj_id != obj_id || tags.chunk_id != i) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)", - obj_id, i, the_chunk, - tags.obj_id, tags.chunk_id); - } - } -} - -void yaffs_verify_link(struct yaffs_obj *obj) -{ - if (obj && yaffs_skip_verification(obj->my_dev)) - return; - - /* Verify sane equivalent object */ -} - -void yaffs_verify_symlink(struct yaffs_obj *obj) -{ - if (obj && yaffs_skip_verification(obj->my_dev)) - return; - - /* Verify symlink string */ -} - -void yaffs_verify_special(struct yaffs_obj *obj) -{ - if (obj && yaffs_skip_verification(obj->my_dev)) - return; -} - -void yaffs_verify_obj(struct yaffs_obj *obj) -{ - struct yaffs_dev *dev; - u32 chunk_min; - u32 chunk_max; - u32 chunk_id_ok; - u32 chunk_in_range; - u32 chunk_wrongly_deleted; - u32 chunk_valid; - - if (!obj) - return; - - if (obj->being_created) - return; - - dev = obj->my_dev; - - if (yaffs_skip_verification(dev)) - return; - - /* Check sane object header chunk */ - - chunk_min = dev->internal_start_block * dev->param.chunks_per_block; - chunk_max = - (dev->internal_end_block + 1) * dev->param.chunks_per_block - 1; - - chunk_in_range = (((unsigned)(obj->hdr_chunk)) >= chunk_min && - ((unsigned)(obj->hdr_chunk)) <= chunk_max); - chunk_id_ok = chunk_in_range || (obj->hdr_chunk == 0); - chunk_valid = chunk_in_range && - yaffs_check_chunk_bit(dev, - obj->hdr_chunk / dev->param.chunks_per_block, - obj->hdr_chunk % dev->param.chunks_per_block); - chunk_wrongly_deleted = chunk_in_range && !chunk_valid; - - if (!obj->fake && (!chunk_id_ok || chunk_wrongly_deleted)) - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d has chunk_id %d %s %s", - obj->obj_id, obj->hdr_chunk, - chunk_id_ok ? "" : ",out of range", - chunk_wrongly_deleted ? ",marked as deleted" : ""); - - if (chunk_valid && !yaffs_skip_nand_verification(dev)) { - struct yaffs_ext_tags tags; - struct yaffs_obj_hdr *oh; - u8 *buffer = yaffs_get_temp_buffer(dev); - - oh = (struct yaffs_obj_hdr *)buffer; - - yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, buffer, &tags); - - yaffs_verify_oh(obj, oh, &tags, 1); - - yaffs_release_temp_buffer(dev, buffer); - } - - /* Verify it has a parent */ - if (obj && !obj->fake && (!obj->parent || obj->parent->my_dev != dev)) { - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d has parent pointer %p which does not look like an object", - obj->obj_id, obj->parent); - } - - /* Verify parent is a directory */ - if (obj->parent && - obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d's parent is not a directory (type %d)", - obj->obj_id, obj->parent->variant_type); - } - - switch (obj->variant_type) { - case YAFFS_OBJECT_TYPE_FILE: - yaffs_verify_file(obj); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - yaffs_verify_symlink(obj); - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - yaffs_verify_dir(obj); - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - yaffs_verify_link(obj); - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - yaffs_verify_special(obj); - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - default: - yaffs_trace(YAFFS_TRACE_VERIFY, - "Obj %d has illegaltype %d", - obj->obj_id, obj->variant_type); - break; - } -} - -void yaffs_verify_objects(struct yaffs_dev *dev) -{ - struct yaffs_obj *obj; - int i; - struct list_head *lh; - - if (yaffs_skip_verification(dev)) - return; - - /* Iterate through the objects in each hash entry */ - - for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { - list_for_each(lh, &dev->obj_bucket[i].list) { - obj = list_entry(lh, struct yaffs_obj, hash_link); - yaffs_verify_obj(obj); - } - } -} - -void yaffs_verify_obj_in_dir(struct yaffs_obj *obj) -{ - struct list_head *lh; - struct yaffs_obj *list_obj; - int count = 0; - - if (!obj) { - yaffs_trace(YAFFS_TRACE_ALWAYS, "No object to verify"); - BUG(); - return; - } - - if (yaffs_skip_verification(obj->my_dev)) - return; - - if (!obj->parent) { - yaffs_trace(YAFFS_TRACE_ALWAYS, "Object does not have parent"); - BUG(); - return; - } - - if (obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_trace(YAFFS_TRACE_ALWAYS, "Parent is not directory"); - BUG(); - } - - /* Iterate through the objects in each hash entry */ - - list_for_each(lh, &obj->parent->variant.dir_variant.children) { - list_obj = list_entry(lh, struct yaffs_obj, siblings); - yaffs_verify_obj(list_obj); - if (obj == list_obj) - count++; - } - - if (count != 1) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "Object in directory %d times", - count); - BUG(); - } -} - -void yaffs_verify_dir(struct yaffs_obj *directory) -{ - struct list_head *lh; - struct yaffs_obj *list_obj; - - if (!directory) { - BUG(); - return; - } - - if (yaffs_skip_full_verification(directory->my_dev)) - return; - - if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "Directory has wrong type: %d", - directory->variant_type); - BUG(); - } - - /* Iterate through the objects in each hash entry */ - - list_for_each(lh, &directory->variant.dir_variant.children) { - list_obj = list_entry(lh, struct yaffs_obj, siblings); - if (list_obj->parent != directory) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "Object in directory list has wrong parent %p", - list_obj->parent); - BUG(); - } - yaffs_verify_obj_in_dir(list_obj); - } -} - -static int yaffs_free_verification_failures; - -void yaffs_verify_free_chunks(struct yaffs_dev *dev) -{ - int counted; - int difference; - - if (yaffs_skip_verification(dev)) - return; - - counted = yaffs_count_free_chunks(dev); - - difference = dev->n_free_chunks - counted; - - if (difference) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "Freechunks verification failure %d %d %d", - dev->n_free_chunks, counted, difference); - yaffs_free_verification_failures++; - } -} - -int yaffs_verify_file_sane(struct yaffs_obj *in) -{ - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_verify.h b/fs/yaffs2/yaffs_verify.h deleted file mode 100644 index 4f4af8d29aa..00000000000 --- a/fs/yaffs2/yaffs_verify.h +++ /dev/null @@ -1,43 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_VERIFY_H__ -#define __YAFFS_VERIFY_H__ - -#include "yaffs_guts.h" - -void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi, - int n); -void yaffs_verify_collected_blk(struct yaffs_dev *dev, - struct yaffs_block_info *bi, int n); -void yaffs_verify_blocks(struct yaffs_dev *dev); - -void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh, - struct yaffs_ext_tags *tags, int parent_check); -void yaffs_verify_file(struct yaffs_obj *obj); -void yaffs_verify_link(struct yaffs_obj *obj); -void yaffs_verify_symlink(struct yaffs_obj *obj); -void yaffs_verify_special(struct yaffs_obj *obj); -void yaffs_verify_obj(struct yaffs_obj *obj); -void yaffs_verify_objects(struct yaffs_dev *dev); -void yaffs_verify_obj_in_dir(struct yaffs_obj *obj); -void yaffs_verify_dir(struct yaffs_obj *directory); -void yaffs_verify_free_chunks(struct yaffs_dev *dev); - -int yaffs_verify_file_sane(struct yaffs_obj *obj); - -int yaffs_skip_verification(struct yaffs_dev *dev); - -#endif diff --git a/fs/yaffs2/yaffs_yaffs1.c b/fs/yaffs2/yaffs_yaffs1.c deleted file mode 100644 index 8c176b982fa..00000000000 --- a/fs/yaffs2/yaffs_yaffs1.c +++ /dev/null @@ -1,420 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_yaffs1.h" -#include "yportenv.h" -#include "yaffs_trace.h" -#include "yaffs_bitmap.h" -#include "yaffs_getblockinfo.h" -#include "yaffs_nand.h" -#include "yaffs_attribs.h" -#include <dm/devres.h> - -int yaffs1_scan(struct yaffs_dev *dev) -{ - struct yaffs_ext_tags tags; - int blk; - int chunk; - int c; - int deleted; - enum yaffs_block_state state; - LIST_HEAD(hard_list); - struct yaffs_block_info *bi; - u32 seq_number; - struct yaffs_obj_hdr *oh; - struct yaffs_obj *in; - struct yaffs_obj *parent; - int alloc_failed = 0; - struct yaffs_shadow_fixer *shadow_fixers = NULL; - u8 *chunk_data; - - yaffs_trace(YAFFS_TRACE_SCAN, - "yaffs1_scan starts intstartblk %d intendblk %d...", - dev->internal_start_block, dev->internal_end_block); - - chunk_data = yaffs_get_temp_buffer(dev); - - dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER; - - /* Scan all the blocks to determine their state */ - bi = dev->block_info; - for (blk = dev->internal_start_block; blk <= dev->internal_end_block; - blk++) { - yaffs_clear_chunk_bits(dev, blk); - bi->pages_in_use = 0; - bi->soft_del_pages = 0; - - yaffs_query_init_block_state(dev, blk, &state, &seq_number); - - bi->block_state = state; - bi->seq_number = seq_number; - - if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK) - bi->block_state = state = YAFFS_BLOCK_STATE_DEAD; - - yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, - "Block scanning block %d state %d seq %d", - blk, state, seq_number); - - if (state == YAFFS_BLOCK_STATE_DEAD) { - yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, - "block %d is bad", blk); - } else if (state == YAFFS_BLOCK_STATE_EMPTY) { - yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty "); - dev->n_erased_blocks++; - dev->n_free_chunks += dev->param.chunks_per_block; - } - bi++; - } - - /* For each block.... */ - for (blk = dev->internal_start_block; - !alloc_failed && blk <= dev->internal_end_block; blk++) { - - cond_resched(); - - bi = yaffs_get_block_info(dev, blk); - state = bi->block_state; - - deleted = 0; - - /* For each chunk in each block that needs scanning.... */ - for (c = 0; - !alloc_failed && c < dev->param.chunks_per_block && - state == YAFFS_BLOCK_STATE_NEEDS_SCAN; c++) { - /* Read the tags and decide what to do */ - chunk = blk * dev->param.chunks_per_block + c; - - yaffs_rd_chunk_tags_nand(dev, chunk, NULL, &tags); - - /* Let's have a good look at this chunk... */ - - if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED || - tags.is_deleted) { - /* YAFFS1 only... - * A deleted chunk - */ - deleted++; - dev->n_free_chunks++; - } else if (!tags.chunk_used) { - /* An unassigned chunk in the block - * This means that either the block is empty or - * this is the one being allocated from - */ - - if (c == 0) { - /* We're looking at the first chunk in - *the block so the block is unused */ - state = YAFFS_BLOCK_STATE_EMPTY; - dev->n_erased_blocks++; - } else { - /* this is the block being allocated */ - yaffs_trace(YAFFS_TRACE_SCAN, - " Allocating from %d %d", - blk, c); - state = YAFFS_BLOCK_STATE_ALLOCATING; - dev->alloc_block = blk; - dev->alloc_page = c; - dev->alloc_block_finder = blk; - - } - - dev->n_free_chunks += - (dev->param.chunks_per_block - c); - } else if (tags.chunk_id > 0) { - /* chunk_id > 0 so it is a data chunk... */ - unsigned int endpos; - - yaffs_set_chunk_bit(dev, blk, c); - bi->pages_in_use++; - - in = yaffs_find_or_create_by_number(dev, - tags.obj_id, - YAFFS_OBJECT_TYPE_FILE); - /* PutChunkIntoFile checks for a clash - * (two data chunks with the same chunk_id). - */ - - if (!in) - alloc_failed = 1; - - if (in) { - if (!yaffs_put_chunk_in_file - (in, tags.chunk_id, chunk, 1)) - alloc_failed = 1; - } - - endpos = - (tags.chunk_id - 1) * - dev->data_bytes_per_chunk + - tags.n_bytes; - if (in && - in->variant_type == - YAFFS_OBJECT_TYPE_FILE && - in->variant.file_variant.scanned_size < - endpos) { - in->variant.file_variant.scanned_size = - endpos; - if (!dev->param.use_header_file_size) { - in->variant. - file_variant.file_size = - in->variant. - file_variant.scanned_size; - } - - } - } else { - /* chunk_id == 0, so it is an ObjectHeader. - * Make the object - */ - yaffs_set_chunk_bit(dev, blk, c); - bi->pages_in_use++; - - yaffs_rd_chunk_tags_nand(dev, chunk, - chunk_data, NULL); - - oh = (struct yaffs_obj_hdr *)chunk_data; - - in = yaffs_find_by_number(dev, tags.obj_id); - if (in && in->variant_type != oh->type) { - /* This should not happen, but somehow - * Wev'e ended up with an obj_id that - * has been reused but not yet deleted, - * and worse still it has changed type. - * Delete the old object. - */ - - yaffs_del_obj(in); - in = NULL; - } - - in = yaffs_find_or_create_by_number(dev, - tags.obj_id, - oh->type); - - if (!in) - alloc_failed = 1; - - if (in && oh->shadows_obj > 0) { - - struct yaffs_shadow_fixer *fixer; - fixer = - kmalloc(sizeof - (struct yaffs_shadow_fixer), - GFP_NOFS); - if (fixer) { - fixer->next = shadow_fixers; - shadow_fixers = fixer; - fixer->obj_id = tags.obj_id; - fixer->shadowed_id = - oh->shadows_obj; - yaffs_trace(YAFFS_TRACE_SCAN, - " Shadow fixer: %d shadows %d", - fixer->obj_id, - fixer->shadowed_id); - - } - - } - - if (in && in->valid) { - /* We have already filled this one. - * We have a duplicate and need to - * resolve it. */ - - unsigned existing_serial = in->serial; - unsigned new_serial = - tags.serial_number; - - if (((existing_serial + 1) & 3) == - new_serial) { - /* Use new one - destroy the - * exisiting one */ - yaffs_chunk_del(dev, - in->hdr_chunk, - 1, __LINE__); - in->valid = 0; - } else { - /* Use existing - destroy - * this one. */ - yaffs_chunk_del(dev, chunk, 1, - __LINE__); - } - } - - if (in && !in->valid && - (tags.obj_id == YAFFS_OBJECTID_ROOT || - tags.obj_id == - YAFFS_OBJECTID_LOSTNFOUND)) { - /* We only load some info, don't fiddle - * with directory structure */ - in->valid = 1; - in->variant_type = oh->type; - - in->yst_mode = oh->yst_mode; - yaffs_load_attribs(in, oh); - in->hdr_chunk = chunk; - in->serial = tags.serial_number; - - } else if (in && !in->valid) { - /* we need to load this info */ - - in->valid = 1; - in->variant_type = oh->type; - - in->yst_mode = oh->yst_mode; - yaffs_load_attribs(in, oh); - in->hdr_chunk = chunk; - in->serial = tags.serial_number; - - yaffs_set_obj_name_from_oh(in, oh); - in->dirty = 0; - - /* directory stuff... - * hook up to parent - */ - - parent = - yaffs_find_or_create_by_number - (dev, oh->parent_obj_id, - YAFFS_OBJECT_TYPE_DIRECTORY); - if (!parent) - alloc_failed = 1; - if (parent && parent->variant_type == - YAFFS_OBJECT_TYPE_UNKNOWN) { - /* Set up as a directory */ - parent->variant_type = - YAFFS_OBJECT_TYPE_DIRECTORY; - INIT_LIST_HEAD(&parent-> - variant.dir_variant. - children); - } else if (!parent || - parent->variant_type != - YAFFS_OBJECT_TYPE_DIRECTORY) { - /* Hoosterman, a problem.... - * We're trying to use a - * non-directory as a directory - */ - - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." - ); - parent = dev->lost_n_found; - } - - yaffs_add_obj_to_dir(parent, in); - - switch (in->variant_type) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Todo got a problem */ - break; - case YAFFS_OBJECT_TYPE_FILE: - if (dev->param. - use_header_file_size) - in->variant. - file_variant.file_size - = yaffs_oh_to_size(oh); - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - in->variant. - hardlink_variant.equiv_id = - oh->equiv_id; - list_add(&in->hard_links, - &hard_list); - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - in->variant.symlink_variant. - alias = - yaffs_clone_str(oh->alias); - if (!in->variant. - symlink_variant.alias) - alloc_failed = 1; - break; - } - } - } - } - - if (state == YAFFS_BLOCK_STATE_NEEDS_SCAN) { - /* If we got this far while scanning, - * then the block is fully allocated. */ - state = YAFFS_BLOCK_STATE_FULL; - } - - if (state == YAFFS_BLOCK_STATE_ALLOCATING) { - /* If the block was partially allocated then - * treat it as fully allocated. */ - state = YAFFS_BLOCK_STATE_FULL; - dev->alloc_block = -1; - } - - bi->block_state = state; - - /* Now let's see if it was dirty */ - if (bi->pages_in_use == 0 && - !bi->has_shrink_hdr && - bi->block_state == YAFFS_BLOCK_STATE_FULL) - yaffs_block_became_dirty(dev, blk); - } - - /* Ok, we've done all the scanning. - * Fix up the hard link chains. - * We should now have scanned all the objects, now it's time to add - * these hardlinks. - */ - - yaffs_link_fixup(dev, &hard_list); - - /* - * Fix up any shadowed objects. - * There should not be more than one of these. - */ - { - struct yaffs_shadow_fixer *fixer; - struct yaffs_obj *obj; - - while (shadow_fixers) { - fixer = shadow_fixers; - shadow_fixers = fixer->next; - /* Complete the rename transaction by deleting the - * shadowed object then setting the object header - to unshadowed. - */ - obj = yaffs_find_by_number(dev, fixer->shadowed_id); - if (obj) - yaffs_del_obj(obj); - - obj = yaffs_find_by_number(dev, fixer->obj_id); - - if (obj) - yaffs_update_oh(obj, NULL, 1, 0, 0, NULL); - - kfree(fixer); - } - } - - yaffs_release_temp_buffer(dev, chunk_data); - - if (alloc_failed) - return YAFFS_FAIL; - - yaffs_trace(YAFFS_TRACE_SCAN, "yaffs1_scan ends"); - - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_yaffs1.h b/fs/yaffs2/yaffs_yaffs1.h deleted file mode 100644 index 97e2fdd08a5..00000000000 --- a/fs/yaffs2/yaffs_yaffs1.h +++ /dev/null @@ -1,22 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_YAFFS1_H__ -#define __YAFFS_YAFFS1_H__ - -#include "yaffs_guts.h" -int yaffs1_scan(struct yaffs_dev *dev); - -#endif diff --git a/fs/yaffs2/yaffs_yaffs2.c b/fs/yaffs2/yaffs_yaffs2.c deleted file mode 100644 index 627a701a45b..00000000000 --- a/fs/yaffs2/yaffs_yaffs2.c +++ /dev/null @@ -1,1526 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include "yaffs_guts.h" -#include "yaffs_trace.h" -#include "yaffs_yaffs2.h" -#include "yaffs_checkptrw.h" -#include "yaffs_bitmap.h" -#include "yaffs_nand.h" -#include "yaffs_getblockinfo.h" -#include "yaffs_verify.h" -#include "yaffs_attribs.h" -#include "yaffs_summary.h" -#include <dm/devres.h> - -/* - * Checkpoints are really no benefit on very small partitions. - * - * To save space on small partitions don't bother with checkpoints unless - * the partition is at least this big. - */ -#define YAFFS_CHECKPOINT_MIN_BLOCKS 60 -#define YAFFS_SMALL_HOLE_THRESHOLD 4 - -/* - * Oldest Dirty Sequence Number handling. - */ - -/* yaffs_calc_oldest_dirty_seq() - * yaffs2_find_oldest_dirty_seq() - * Calculate the oldest dirty sequence number if we don't know it. - */ -void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev) -{ - int i; - unsigned seq; - unsigned block_no = 0; - struct yaffs_block_info *b; - - if (!dev->param.is_yaffs2) - return; - - /* Find the oldest dirty sequence number. */ - seq = dev->seq_number + 1; - b = dev->block_info; - for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { - if (b->block_state == YAFFS_BLOCK_STATE_FULL && - (b->pages_in_use - b->soft_del_pages) < - dev->param.chunks_per_block && - b->seq_number < seq) { - seq = b->seq_number; - block_no = i; - } - b++; - } - - if (block_no) { - dev->oldest_dirty_seq = seq; - dev->oldest_dirty_block = block_no; - } -} - -void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev) -{ - if (!dev->param.is_yaffs2) - return; - - if (!dev->oldest_dirty_seq) - yaffs_calc_oldest_dirty_seq(dev); -} - -/* - * yaffs_clear_oldest_dirty_seq() - * Called when a block is erased or marked bad. (ie. when its seq_number - * becomes invalid). If the value matches the oldest then we clear - * dev->oldest_dirty_seq to force its recomputation. - */ -void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev, - struct yaffs_block_info *bi) -{ - - if (!dev->param.is_yaffs2) - return; - - if (!bi || bi->seq_number == dev->oldest_dirty_seq) { - dev->oldest_dirty_seq = 0; - dev->oldest_dirty_block = 0; - } -} - -/* - * yaffs2_update_oldest_dirty_seq() - * Update the oldest dirty sequence number whenever we dirty a block. - * Only do this if the oldest_dirty_seq is actually being tracked. - */ -void yaffs2_update_oldest_dirty_seq(struct yaffs_dev *dev, unsigned block_no, - struct yaffs_block_info *bi) -{ - if (!dev->param.is_yaffs2) - return; - - if (dev->oldest_dirty_seq) { - if (dev->oldest_dirty_seq > bi->seq_number) { - dev->oldest_dirty_seq = bi->seq_number; - dev->oldest_dirty_block = block_no; - } - } -} - -int yaffs_block_ok_for_gc(struct yaffs_dev *dev, struct yaffs_block_info *bi) -{ - - if (!dev->param.is_yaffs2) - return 1; /* disqualification only applies to yaffs2. */ - - if (!bi->has_shrink_hdr) - return 1; /* can gc */ - - yaffs2_find_oldest_dirty_seq(dev); - - /* Can't do gc of this block if there are any blocks older than this - * one that have discarded pages. - */ - return (bi->seq_number <= dev->oldest_dirty_seq); -} - -/* - * yaffs2_find_refresh_block() - * periodically finds the oldest full block by sequence number for refreshing. - * Only for yaffs2. - */ -u32 yaffs2_find_refresh_block(struct yaffs_dev *dev) -{ - u32 b; - u32 oldest = 0; - u32 oldest_seq = 0; - struct yaffs_block_info *bi; - - if (!dev->param.is_yaffs2) - return oldest; - - /* - * If refresh period < 10 then refreshing is disabled. - */ - if (dev->param.refresh_period < 10) - return oldest; - - /* - * Fix broken values. - */ - if (dev->refresh_skip > dev->param.refresh_period) - dev->refresh_skip = dev->param.refresh_period; - - if (dev->refresh_skip > 0) - return oldest; - - /* - * Refresh skip is now zero. - * We'll do a refresh this time around.... - * Update the refresh skip and find the oldest block. - */ - dev->refresh_skip = dev->param.refresh_period; - dev->refresh_count++; - bi = dev->block_info; - for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) { - - if (bi->block_state == YAFFS_BLOCK_STATE_FULL) { - - if (oldest < 1 || bi->seq_number < oldest_seq) { - oldest = b; - oldest_seq = bi->seq_number; - } - } - bi++; - } - - if (oldest > 0) { - yaffs_trace(YAFFS_TRACE_GC, - "GC refresh count %d selected block %d with seq_number %d", - dev->refresh_count, oldest, oldest_seq); - } - - return oldest; -} - -int yaffs2_checkpt_required(struct yaffs_dev *dev) -{ - int nblocks; - - if (!dev->param.is_yaffs2) - return 0; - - nblocks = dev->internal_end_block - dev->internal_start_block + 1; - - return !dev->param.skip_checkpt_wr && - !dev->read_only && (nblocks >= YAFFS_CHECKPOINT_MIN_BLOCKS); -} - -int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev) -{ - int retval; - int n_bytes = 0; - int n_blocks; - int dev_blocks; - - if (!dev->param.is_yaffs2) - return 0; - - if (!dev->checkpoint_blocks_required && yaffs2_checkpt_required(dev)) { - /* Not a valid value so recalculate */ - dev_blocks = dev->param.end_block - dev->param.start_block + 1; - n_bytes += sizeof(struct yaffs_checkpt_validity); - n_bytes += sizeof(struct yaffs_checkpt_dev); - n_bytes += dev_blocks * sizeof(struct yaffs_block_info); - n_bytes += dev_blocks * dev->chunk_bit_stride; - n_bytes += - (sizeof(struct yaffs_checkpt_obj) + sizeof(u32)) * - dev->n_obj; - n_bytes += (dev->tnode_size + sizeof(u32)) * dev->n_tnodes; - n_bytes += sizeof(struct yaffs_checkpt_validity); - n_bytes += sizeof(u32); /* checksum */ - - /* Round up and add 2 blocks to allow for some bad blocks, - * so add 3 */ - - n_blocks = - (n_bytes / - (dev->data_bytes_per_chunk * - dev->param.chunks_per_block)) + 3; - - dev->checkpoint_blocks_required = n_blocks; - } - - retval = dev->checkpoint_blocks_required - dev->blocks_in_checkpt; - if (retval < 0) - retval = 0; - return retval; -} - -/*--------------------- Checkpointing --------------------*/ - -static int yaffs2_wr_checkpt_validity_marker(struct yaffs_dev *dev, int head) -{ - struct yaffs_checkpt_validity cp; - - memset(&cp, 0, sizeof(cp)); - - cp.struct_type = sizeof(cp); - cp.magic = YAFFS_MAGIC; - cp.version = YAFFS_CHECKPOINT_VERSION; - cp.head = (head) ? 1 : 0; - - return (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)) ? 1 : 0; -} - -static int yaffs2_rd_checkpt_validity_marker(struct yaffs_dev *dev, int head) -{ - struct yaffs_checkpt_validity cp; - int ok; - - ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp)); - - if (ok) - ok = (cp.struct_type == sizeof(cp)) && - (cp.magic == YAFFS_MAGIC) && - (cp.version == YAFFS_CHECKPOINT_VERSION) && - (cp.head == ((head) ? 1 : 0)); - return ok ? 1 : 0; -} - -static void yaffs2_dev_to_checkpt_dev(struct yaffs_checkpt_dev *cp, - struct yaffs_dev *dev) -{ - cp->n_erased_blocks = dev->n_erased_blocks; - cp->alloc_block = dev->alloc_block; - cp->alloc_page = dev->alloc_page; - cp->n_free_chunks = dev->n_free_chunks; - - cp->n_deleted_files = dev->n_deleted_files; - cp->n_unlinked_files = dev->n_unlinked_files; - cp->n_bg_deletions = dev->n_bg_deletions; - cp->seq_number = dev->seq_number; - -} - -static void yaffs_checkpt_dev_to_dev(struct yaffs_dev *dev, - struct yaffs_checkpt_dev *cp) -{ - dev->n_erased_blocks = cp->n_erased_blocks; - dev->alloc_block = cp->alloc_block; - dev->alloc_page = cp->alloc_page; - dev->n_free_chunks = cp->n_free_chunks; - - dev->n_deleted_files = cp->n_deleted_files; - dev->n_unlinked_files = cp->n_unlinked_files; - dev->n_bg_deletions = cp->n_bg_deletions; - dev->seq_number = cp->seq_number; -} - -static int yaffs2_wr_checkpt_dev(struct yaffs_dev *dev) -{ - struct yaffs_checkpt_dev cp; - u32 n_bytes; - u32 n_blocks = dev->internal_end_block - dev->internal_start_block + 1; - int ok; - - /* Write device runtime values */ - yaffs2_dev_to_checkpt_dev(&cp, dev); - cp.struct_type = sizeof(cp); - - ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)); - if (!ok) - return 0; - - /* Write block info */ - n_bytes = n_blocks * sizeof(struct yaffs_block_info); - ok = (yaffs2_checkpt_wr(dev, dev->block_info, n_bytes) == n_bytes); - if (!ok) - return 0; - - /* Write chunk bits */ - n_bytes = n_blocks * dev->chunk_bit_stride; - ok = (yaffs2_checkpt_wr(dev, dev->chunk_bits, n_bytes) == n_bytes); - - return ok ? 1 : 0; -} - -static int yaffs2_rd_checkpt_dev(struct yaffs_dev *dev) -{ - struct yaffs_checkpt_dev cp; - u32 n_bytes; - u32 n_blocks = - (dev->internal_end_block - dev->internal_start_block + 1); - int ok; - - ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp)); - if (!ok) - return 0; - - if (cp.struct_type != sizeof(cp)) - return 0; - - yaffs_checkpt_dev_to_dev(dev, &cp); - - n_bytes = n_blocks * sizeof(struct yaffs_block_info); - - ok = (yaffs2_checkpt_rd(dev, dev->block_info, n_bytes) == n_bytes); - - if (!ok) - return 0; - - n_bytes = n_blocks * dev->chunk_bit_stride; - - ok = (yaffs2_checkpt_rd(dev, dev->chunk_bits, n_bytes) == n_bytes); - - return ok ? 1 : 0; -} - -static void yaffs2_obj_checkpt_obj(struct yaffs_checkpt_obj *cp, - struct yaffs_obj *obj) -{ - cp->obj_id = obj->obj_id; - cp->parent_id = (obj->parent) ? obj->parent->obj_id : 0; - cp->hdr_chunk = obj->hdr_chunk; - cp->variant_type = obj->variant_type; - cp->deleted = obj->deleted; - cp->soft_del = obj->soft_del; - cp->unlinked = obj->unlinked; - cp->fake = obj->fake; - cp->rename_allowed = obj->rename_allowed; - cp->unlink_allowed = obj->unlink_allowed; - cp->serial = obj->serial; - cp->n_data_chunks = obj->n_data_chunks; - - if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) - cp->size_or_equiv_obj = obj->variant.file_variant.file_size; - else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) - cp->size_or_equiv_obj = obj->variant.hardlink_variant.equiv_id; -} - -static int yaffs2_checkpt_obj_to_obj(struct yaffs_obj *obj, - struct yaffs_checkpt_obj *cp) -{ - struct yaffs_obj *parent; - - if (obj->variant_type != cp->variant_type) { - yaffs_trace(YAFFS_TRACE_ERROR, - "Checkpoint read object %d type %d chunk %d does not match existing object type %d", - cp->obj_id, cp->variant_type, cp->hdr_chunk, - obj->variant_type); - return 0; - } - - obj->obj_id = cp->obj_id; - - if (cp->parent_id) - parent = yaffs_find_or_create_by_number(obj->my_dev, - cp->parent_id, - YAFFS_OBJECT_TYPE_DIRECTORY); - else - parent = NULL; - - if (parent) { - if (parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_trace(YAFFS_TRACE_ALWAYS, - "Checkpoint read object %d parent %d type %d chunk %d Parent type, %d, not directory", - cp->obj_id, cp->parent_id, - cp->variant_type, cp->hdr_chunk, - parent->variant_type); - return 0; - } - yaffs_add_obj_to_dir(parent, obj); - } - - obj->hdr_chunk = cp->hdr_chunk; - obj->variant_type = cp->variant_type; - obj->deleted = cp->deleted; - obj->soft_del = cp->soft_del; - obj->unlinked = cp->unlinked; - obj->fake = cp->fake; - obj->rename_allowed = cp->rename_allowed; - obj->unlink_allowed = cp->unlink_allowed; - obj->serial = cp->serial; - obj->n_data_chunks = cp->n_data_chunks; - - if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) - obj->variant.file_variant.file_size = cp->size_or_equiv_obj; - else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) - obj->variant.hardlink_variant.equiv_id = cp->size_or_equiv_obj; - - if (obj->hdr_chunk > 0) - obj->lazy_loaded = 1; - return 1; -} - -static int yaffs2_checkpt_tnode_worker(struct yaffs_obj *in, - struct yaffs_tnode *tn, u32 level, - int chunk_offset) -{ - int i; - struct yaffs_dev *dev = in->my_dev; - int ok = 1; - u32 base_offset; - - if (!tn) - return 1; - - if (level > 0) { - for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) { - if (!tn->internal[i]) - continue; - ok = yaffs2_checkpt_tnode_worker(in, - tn->internal[i], - level - 1, - (chunk_offset << - YAFFS_TNODES_INTERNAL_BITS) + i); - } - return ok; - } - - /* Level 0 tnode */ - base_offset = chunk_offset << YAFFS_TNODES_LEVEL0_BITS; - ok = (yaffs2_checkpt_wr(dev, &base_offset, sizeof(base_offset)) == - sizeof(base_offset)); - if (ok) - ok = (yaffs2_checkpt_wr(dev, tn, dev->tnode_size) == - dev->tnode_size); - - return ok; -} - -static int yaffs2_wr_checkpt_tnodes(struct yaffs_obj *obj) -{ - u32 end_marker = ~0; - int ok = 1; - - if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE) - return ok; - - ok = yaffs2_checkpt_tnode_worker(obj, - obj->variant.file_variant.top, - obj->variant.file_variant. - top_level, 0); - if (ok) - ok = (yaffs2_checkpt_wr(obj->my_dev, &end_marker, - sizeof(end_marker)) == sizeof(end_marker)); - - return ok ? 1 : 0; -} - -static int yaffs2_rd_checkpt_tnodes(struct yaffs_obj *obj) -{ - u32 base_chunk; - int ok = 1; - struct yaffs_dev *dev = obj->my_dev; - struct yaffs_file_var *file_stuct_ptr = &obj->variant.file_variant; - struct yaffs_tnode *tn; - int nread = 0; - - ok = (yaffs2_checkpt_rd(dev, &base_chunk, sizeof(base_chunk)) == - sizeof(base_chunk)); - - while (ok && (~base_chunk)) { - nread++; - /* Read level 0 tnode */ - - tn = yaffs_get_tnode(dev); - if (tn) - ok = (yaffs2_checkpt_rd(dev, tn, dev->tnode_size) == - dev->tnode_size); - else - ok = 0; - - if (tn && ok) - ok = yaffs_add_find_tnode_0(dev, - file_stuct_ptr, - base_chunk, tn) ? 1 : 0; - - if (ok) - ok = (yaffs2_checkpt_rd - (dev, &base_chunk, - sizeof(base_chunk)) == sizeof(base_chunk)); - } - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "Checkpoint read tnodes %d records, last %d. ok %d", - nread, base_chunk, ok); - - return ok ? 1 : 0; -} - -static int yaffs2_wr_checkpt_objs(struct yaffs_dev *dev) -{ - struct yaffs_obj *obj; - struct yaffs_checkpt_obj cp; - int i; - int ok = 1; - struct list_head *lh; - - /* Iterate through the objects in each hash entry, - * dumping them to the checkpointing stream. - */ - - for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) { - list_for_each(lh, &dev->obj_bucket[i].list) { - obj = list_entry(lh, struct yaffs_obj, hash_link); - if (!obj->defered_free) { - yaffs2_obj_checkpt_obj(&cp, obj); - cp.struct_type = sizeof(cp); - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "Checkpoint write object %d parent %d type %d chunk %d obj addr %p", - cp.obj_id, cp.parent_id, - cp.variant_type, cp.hdr_chunk, obj); - - ok = (yaffs2_checkpt_wr(dev, &cp, - sizeof(cp)) == sizeof(cp)); - - if (ok && - obj->variant_type == - YAFFS_OBJECT_TYPE_FILE) - ok = yaffs2_wr_checkpt_tnodes(obj); - } - } - } - - /* Dump end of list */ - memset(&cp, 0xff, sizeof(struct yaffs_checkpt_obj)); - cp.struct_type = sizeof(cp); - - if (ok) - ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)); - - return ok ? 1 : 0; -} - -static int yaffs2_rd_checkpt_objs(struct yaffs_dev *dev) -{ - struct yaffs_obj *obj; - struct yaffs_checkpt_obj cp; - int ok = 1; - int done = 0; - LIST_HEAD(hard_list); - - while (ok && !done) { - ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp)); - if (cp.struct_type != sizeof(cp)) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "struct size %d instead of %d ok %d", - cp.struct_type, (int)sizeof(cp), ok); - ok = 0; - } - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "Checkpoint read object %d parent %d type %d chunk %d ", - cp.obj_id, cp.parent_id, cp.variant_type, - cp.hdr_chunk); - - if (ok && cp.obj_id == ~0) { - done = 1; - } else if (ok) { - obj = - yaffs_find_or_create_by_number(dev, cp.obj_id, - cp.variant_type); - if (obj) { - ok = yaffs2_checkpt_obj_to_obj(obj, &cp); - if (!ok) - break; - if (obj->variant_type == - YAFFS_OBJECT_TYPE_FILE) { - ok = yaffs2_rd_checkpt_tnodes(obj); - } else if (obj->variant_type == - YAFFS_OBJECT_TYPE_HARDLINK) { - list_add(&obj->hard_links, &hard_list); - } - } else { - ok = 0; - } - } - } - - if (ok) - yaffs_link_fixup(dev, &hard_list); - - return ok ? 1 : 0; -} - -static int yaffs2_wr_checkpt_sum(struct yaffs_dev *dev) -{ - u32 checkpt_sum; - int ok; - - yaffs2_get_checkpt_sum(dev, &checkpt_sum); - - ok = (yaffs2_checkpt_wr(dev, &checkpt_sum, sizeof(checkpt_sum)) == - sizeof(checkpt_sum)); - - if (!ok) - return 0; - - return 1; -} - -static int yaffs2_rd_checkpt_sum(struct yaffs_dev *dev) -{ - u32 checkpt_sum0; - u32 checkpt_sum1; - int ok; - - yaffs2_get_checkpt_sum(dev, &checkpt_sum0); - - ok = (yaffs2_checkpt_rd(dev, &checkpt_sum1, sizeof(checkpt_sum1)) == - sizeof(checkpt_sum1)); - - if (!ok) - return 0; - - if (checkpt_sum0 != checkpt_sum1) - return 0; - - return 1; -} - -static int yaffs2_wr_checkpt_data(struct yaffs_dev *dev) -{ - int ok = 1; - - if (!yaffs2_checkpt_required(dev)) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "skipping checkpoint write"); - ok = 0; - } - - if (ok) - ok = yaffs2_checkpt_open(dev, 1); - - if (ok) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "write checkpoint validity"); - ok = yaffs2_wr_checkpt_validity_marker(dev, 1); - } - if (ok) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "write checkpoint device"); - ok = yaffs2_wr_checkpt_dev(dev); - } - if (ok) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "write checkpoint objects"); - ok = yaffs2_wr_checkpt_objs(dev); - } - if (ok) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "write checkpoint validity"); - ok = yaffs2_wr_checkpt_validity_marker(dev, 0); - } - - if (ok) - ok = yaffs2_wr_checkpt_sum(dev); - - if (!yaffs_checkpt_close(dev)) - ok = 0; - - if (ok) - dev->is_checkpointed = 1; - else - dev->is_checkpointed = 0; - - return dev->is_checkpointed; -} - -static int yaffs2_rd_checkpt_data(struct yaffs_dev *dev) -{ - int ok = 1; - - if (!dev->param.is_yaffs2) - ok = 0; - - if (ok && dev->param.skip_checkpt_rd) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "skipping checkpoint read"); - ok = 0; - } - - if (ok) - ok = yaffs2_checkpt_open(dev, 0); /* open for read */ - - if (ok) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "read checkpoint validity"); - ok = yaffs2_rd_checkpt_validity_marker(dev, 1); - } - if (ok) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "read checkpoint device"); - ok = yaffs2_rd_checkpt_dev(dev); - } - if (ok) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "read checkpoint objects"); - ok = yaffs2_rd_checkpt_objs(dev); - } - if (ok) { - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "read checkpoint validity"); - ok = yaffs2_rd_checkpt_validity_marker(dev, 0); - } - - if (ok) { - ok = yaffs2_rd_checkpt_sum(dev); - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "read checkpoint checksum %d", ok); - } - - if (!yaffs_checkpt_close(dev)) - ok = 0; - - if (ok) - dev->is_checkpointed = 1; - else - dev->is_checkpointed = 0; - - return ok ? 1 : 0; -} - -void yaffs2_checkpt_invalidate(struct yaffs_dev *dev) -{ - if (dev->is_checkpointed || dev->blocks_in_checkpt > 0) { - dev->is_checkpointed = 0; - yaffs2_checkpt_invalidate_stream(dev); - } - if (dev->param.sb_dirty_fn) - dev->param.sb_dirty_fn(dev); -} - -int yaffs_checkpoint_save(struct yaffs_dev *dev) -{ - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "save entry: is_checkpointed %d", - dev->is_checkpointed); - - yaffs_verify_objects(dev); - yaffs_verify_blocks(dev); - yaffs_verify_free_chunks(dev); - - if (!dev->is_checkpointed) { - yaffs2_checkpt_invalidate(dev); - yaffs2_wr_checkpt_data(dev); - } - - yaffs_trace(YAFFS_TRACE_CHECKPOINT | YAFFS_TRACE_MOUNT, - "save exit: is_checkpointed %d", - dev->is_checkpointed); - - return dev->is_checkpointed; -} - -int yaffs2_checkpt_restore(struct yaffs_dev *dev) -{ - int retval; - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "restore entry: is_checkpointed %d", - dev->is_checkpointed); - - retval = yaffs2_rd_checkpt_data(dev); - - if (dev->is_checkpointed) { - yaffs_verify_objects(dev); - yaffs_verify_blocks(dev); - yaffs_verify_free_chunks(dev); - } - - yaffs_trace(YAFFS_TRACE_CHECKPOINT, - "restore exit: is_checkpointed %d", - dev->is_checkpointed); - - return retval; -} - -int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size) -{ - /* if new_size > old_file_size. - * We're going to be writing a hole. - * If the hole is small then write zeros otherwise write a start - * of hole marker. - */ - loff_t old_file_size; - loff_t increase; - int small_hole; - int result = YAFFS_OK; - struct yaffs_dev *dev = NULL; - u8 *local_buffer = NULL; - int small_increase_ok = 0; - - if (!obj) - return YAFFS_FAIL; - - if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE) - return YAFFS_FAIL; - - dev = obj->my_dev; - - /* Bail out if not yaffs2 mode */ - if (!dev->param.is_yaffs2) - return YAFFS_OK; - - old_file_size = obj->variant.file_variant.file_size; - - if (new_size <= old_file_size) - return YAFFS_OK; - - increase = new_size - old_file_size; - - if (increase < YAFFS_SMALL_HOLE_THRESHOLD * dev->data_bytes_per_chunk && - yaffs_check_alloc_available(dev, YAFFS_SMALL_HOLE_THRESHOLD + 1)) - small_hole = 1; - else - small_hole = 0; - - if (small_hole) - local_buffer = yaffs_get_temp_buffer(dev); - - if (local_buffer) { - /* fill hole with zero bytes */ - loff_t pos = old_file_size; - int this_write; - int written; - memset(local_buffer, 0, dev->data_bytes_per_chunk); - small_increase_ok = 1; - - while (increase > 0 && small_increase_ok) { - this_write = increase; - if (this_write > dev->data_bytes_per_chunk) - this_write = dev->data_bytes_per_chunk; - written = - yaffs_do_file_wr(obj, local_buffer, pos, this_write, - 0); - if (written == this_write) { - pos += this_write; - increase -= this_write; - } else { - small_increase_ok = 0; - } - } - - yaffs_release_temp_buffer(dev, local_buffer); - - /* If out of space then reverse any chunks we've added */ - if (!small_increase_ok) - yaffs_resize_file_down(obj, old_file_size); - } - - if (!small_increase_ok && - obj->parent && - obj->parent->obj_id != YAFFS_OBJECTID_UNLINKED && - obj->parent->obj_id != YAFFS_OBJECTID_DELETED) { - /* Write a hole start header with the old file size */ - yaffs_update_oh(obj, NULL, 0, 1, 0, NULL); - } - - return result; -} - -struct yaffs_block_index { - int seq; - int block; -}; - -static int yaffs2_ybicmp(const void *a, const void *b) -{ - int aseq = ((struct yaffs_block_index *)a)->seq; - int bseq = ((struct yaffs_block_index *)b)->seq; - int ablock = ((struct yaffs_block_index *)a)->block; - int bblock = ((struct yaffs_block_index *)b)->block; - - if (aseq == bseq) - return ablock - bblock; - - return aseq - bseq; -} - -static inline int yaffs2_scan_chunk(struct yaffs_dev *dev, - struct yaffs_block_info *bi, - int blk, int chunk_in_block, - int *found_chunks, - u8 *chunk_data, - struct list_head *hard_list, - int summary_available) -{ - struct yaffs_obj_hdr *oh; - struct yaffs_obj *in; - struct yaffs_obj *parent; - int equiv_id; - loff_t file_size; - int is_shrink; - int is_unlinked; - struct yaffs_ext_tags tags; - int alloc_failed = 0; - int chunk = blk * dev->param.chunks_per_block + chunk_in_block; - struct yaffs_file_var *file_var; - struct yaffs_hardlink_var *hl_var; - struct yaffs_symlink_var *sl_var; - - if (summary_available) { - yaffs_summary_fetch(dev, &tags, chunk_in_block); - tags.seq_number = bi->seq_number; - } - - if (!summary_available || tags.obj_id == 0) { - yaffs_rd_chunk_tags_nand(dev, chunk, NULL, &tags); - dev->tags_used++; - } else { - dev->summary_used++; - } - - /* Let's have a good look at this chunk... */ - - if (!tags.chunk_used) { - /* An unassigned chunk in the block. - * If there are used chunks after this one, then - * it is a chunk that was skipped due to failing - * the erased check. Just skip it so that it can - * be deleted. - * But, more typically, We get here when this is - * an unallocated chunk and his means that - * either the block is empty or this is the one - * being allocated from - */ - - if (*found_chunks) { - /* This is a chunk that was skipped due - * to failing the erased check */ - } else if (chunk_in_block == 0) { - /* We're looking at the first chunk in - * the block so the block is unused */ - bi->block_state = YAFFS_BLOCK_STATE_EMPTY; - dev->n_erased_blocks++; - } else { - if (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN || - bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) { - if (dev->seq_number == bi->seq_number) { - /* Allocating from this block*/ - yaffs_trace(YAFFS_TRACE_SCAN, - " Allocating from %d %d", - blk, chunk_in_block); - - bi->block_state = - YAFFS_BLOCK_STATE_ALLOCATING; - dev->alloc_block = blk; - dev->alloc_page = chunk_in_block; - dev->alloc_block_finder = blk; - } else { - /* This is a partially written block - * that is not the current - * allocation block. - */ - yaffs_trace(YAFFS_TRACE_SCAN, - "Partially written block %d detected. gc will fix this.", - blk); - } - } - } - - dev->n_free_chunks++; - - } else if (tags.ecc_result == - YAFFS_ECC_RESULT_UNFIXED) { - yaffs_trace(YAFFS_TRACE_SCAN, - " Unfixed ECC in chunk(%d:%d), chunk ignored", - blk, chunk_in_block); - dev->n_free_chunks++; - } else if (tags.obj_id > YAFFS_MAX_OBJECT_ID || - tags.chunk_id > YAFFS_MAX_CHUNK_ID || - tags.obj_id == YAFFS_OBJECTID_SUMMARY || - (tags.chunk_id > 0 && - tags.n_bytes > dev->data_bytes_per_chunk) || - tags.seq_number != bi->seq_number) { - yaffs_trace(YAFFS_TRACE_SCAN, - "Chunk (%d:%d) with bad tags:obj = %d, chunk_id = %d, n_bytes = %d, ignored", - blk, chunk_in_block, tags.obj_id, - tags.chunk_id, tags.n_bytes); - dev->n_free_chunks++; - } else if (tags.chunk_id > 0) { - /* chunk_id > 0 so it is a data chunk... */ - loff_t endpos; - loff_t chunk_base = (tags.chunk_id - 1) * - dev->data_bytes_per_chunk; - - *found_chunks = 1; - - yaffs_set_chunk_bit(dev, blk, chunk_in_block); - bi->pages_in_use++; - - in = yaffs_find_or_create_by_number(dev, - tags.obj_id, - YAFFS_OBJECT_TYPE_FILE); - if (!in) - /* Out of memory */ - alloc_failed = 1; - - if (in && - in->variant_type == YAFFS_OBJECT_TYPE_FILE && - chunk_base < in->variant.file_variant.shrink_size) { - /* This has not been invalidated by - * a resize */ - if (!yaffs_put_chunk_in_file(in, tags.chunk_id, - chunk, -1)) - alloc_failed = 1; - - /* File size is calculated by looking at - * the data chunks if we have not - * seen an object header yet. - * Stop this practice once we find an - * object header. - */ - endpos = chunk_base + tags.n_bytes; - - if (!in->valid && - in->variant.file_variant.scanned_size < endpos) { - in->variant.file_variant. - scanned_size = endpos; - in->variant.file_variant. - file_size = endpos; - } - } else if (in) { - /* This chunk has been invalidated by a - * resize, or a past file deletion - * so delete the chunk*/ - yaffs_chunk_del(dev, chunk, 1, __LINE__); - } - } else { - /* chunk_id == 0, so it is an ObjectHeader. - * Thus, we read in the object header and make - * the object - */ - *found_chunks = 1; - - yaffs_set_chunk_bit(dev, blk, chunk_in_block); - bi->pages_in_use++; - - oh = NULL; - in = NULL; - - if (tags.extra_available) { - in = yaffs_find_or_create_by_number(dev, - tags.obj_id, - tags.extra_obj_type); - if (!in) - alloc_failed = 1; - } - - if (!in || - (!in->valid && dev->param.disable_lazy_load) || - tags.extra_shadows || - (!in->valid && (tags.obj_id == YAFFS_OBJECTID_ROOT || - tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND))) { - - /* If we don't have valid info then we - * need to read the chunk - * TODO In future we can probably defer - * reading the chunk and living with - * invalid data until needed. - */ - - yaffs_rd_chunk_tags_nand(dev, chunk, chunk_data, NULL); - - oh = (struct yaffs_obj_hdr *)chunk_data; - - if (dev->param.inband_tags) { - /* Fix up the header if they got - * corrupted by inband tags */ - oh->shadows_obj = - oh->inband_shadowed_obj_id; - oh->is_shrink = - oh->inband_is_shrink; - } - - if (!in) { - in = yaffs_find_or_create_by_number(dev, - tags.obj_id, oh->type); - if (!in) - alloc_failed = 1; - } - } - - if (!in) { - /* TODO Hoosterman we have a problem! */ - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs tragedy: Could not make object for object %d at chunk %d during scan", - tags.obj_id, chunk); - return YAFFS_FAIL; - } - - if (in->valid) { - /* We have already filled this one. - * We have a duplicate that will be - * discarded, but we first have to suck - * out resize info if it is a file. - */ - if ((in->variant_type == YAFFS_OBJECT_TYPE_FILE) && - ((oh && oh->type == YAFFS_OBJECT_TYPE_FILE) || - (tags.extra_available && - tags.extra_obj_type == YAFFS_OBJECT_TYPE_FILE) - )) { - loff_t this_size = (oh) ? - yaffs_oh_to_size(oh) : - tags.extra_file_size; - u32 parent_obj_id = (oh) ? - oh->parent_obj_id : - tags.extra_parent_id; - - is_shrink = (oh) ? - oh->is_shrink : - tags.extra_is_shrink; - - /* If it is deleted (unlinked - * at start also means deleted) - * we treat the file size as - * being zeroed at this point. - */ - if (parent_obj_id == YAFFS_OBJECTID_DELETED || - parent_obj_id == YAFFS_OBJECTID_UNLINKED) { - this_size = 0; - is_shrink = 1; - } - - if (is_shrink && - in->variant.file_variant.shrink_size > - this_size) - in->variant.file_variant.shrink_size = - this_size; - - if (is_shrink) - bi->has_shrink_hdr = 1; - } - /* Use existing - destroy this one. */ - yaffs_chunk_del(dev, chunk, 1, __LINE__); - } - - if (!in->valid && in->variant_type != - (oh ? oh->type : tags.extra_obj_type)) - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs tragedy: Bad object type, %d != %d, for object %d at chunk %d during scan", - oh ? oh->type : tags.extra_obj_type, - in->variant_type, tags.obj_id, - chunk); - - if (!in->valid && - (tags.obj_id == YAFFS_OBJECTID_ROOT || - tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND)) { - /* We only load some info, don't fiddle - * with directory structure */ - in->valid = 1; - - if (oh) { - in->yst_mode = oh->yst_mode; - yaffs_load_attribs(in, oh); - in->lazy_loaded = 0; - } else { - in->lazy_loaded = 1; - } - in->hdr_chunk = chunk; - - } else if (!in->valid) { - /* we need to load this info */ - in->valid = 1; - in->hdr_chunk = chunk; - if (oh) { - in->variant_type = oh->type; - in->yst_mode = oh->yst_mode; - yaffs_load_attribs(in, oh); - - if (oh->shadows_obj > 0) - yaffs_handle_shadowed_obj(dev, - oh->shadows_obj, 1); - - yaffs_set_obj_name_from_oh(in, oh); - parent = yaffs_find_or_create_by_number(dev, - oh->parent_obj_id, - YAFFS_OBJECT_TYPE_DIRECTORY); - file_size = yaffs_oh_to_size(oh); - is_shrink = oh->is_shrink; - equiv_id = oh->equiv_id; - } else { - in->variant_type = tags.extra_obj_type; - parent = yaffs_find_or_create_by_number(dev, - tags.extra_parent_id, - YAFFS_OBJECT_TYPE_DIRECTORY); - file_size = tags.extra_file_size; - is_shrink = tags.extra_is_shrink; - equiv_id = tags.extra_equiv_id; - in->lazy_loaded = 1; - } - in->dirty = 0; - - if (!parent) - alloc_failed = 1; - - /* directory stuff... - * hook up to parent - */ - - if (parent && - parent->variant_type == YAFFS_OBJECT_TYPE_UNKNOWN) { - /* Set up as a directory */ - parent->variant_type = - YAFFS_OBJECT_TYPE_DIRECTORY; - INIT_LIST_HEAD(&parent-> - variant.dir_variant.children); - } else if (!parent || - parent->variant_type != - YAFFS_OBJECT_TYPE_DIRECTORY) { - /* Hoosterman, another problem.... - * Trying to use a non-directory as a directory - */ - - yaffs_trace(YAFFS_TRACE_ERROR, - "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." - ); - parent = dev->lost_n_found; - } - yaffs_add_obj_to_dir(parent, in); - - is_unlinked = (parent == dev->del_dir) || - (parent == dev->unlinked_dir); - - if (is_shrink) - /* Mark the block */ - bi->has_shrink_hdr = 1; - - /* Note re hardlinks. - * Since we might scan a hardlink before its equivalent - * object is scanned we put them all in a list. - * After scanning is complete, we should have all the - * objects, so we run through this list and fix up all - * the chains. - */ - - switch (in->variant_type) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Todo got a problem */ - break; - case YAFFS_OBJECT_TYPE_FILE: - file_var = &in->variant.file_variant; - if (file_var->scanned_size < file_size) { - /* This covers the case where the file - * size is greater than the data held. - * This will happen if the file is - * resized to be larger than its - * current data extents. - */ - file_var->file_size = file_size; - file_var->scanned_size = file_size; - } - - if (file_var->shrink_size > file_size) - file_var->shrink_size = file_size; - - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - hl_var = &in->variant.hardlink_variant; - if (!is_unlinked) { - hl_var->equiv_id = equiv_id; - list_add(&in->hard_links, hard_list); - } - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - sl_var = &in->variant.symlink_variant; - if (oh) { - sl_var->alias = - yaffs_clone_str(oh->alias); - if (!sl_var->alias) - alloc_failed = 1; - } - break; - } - } - } - return alloc_failed ? YAFFS_FAIL : YAFFS_OK; -} - -int yaffs2_scan_backwards(struct yaffs_dev *dev) -{ - int blk; - int block_iter; - int start_iter; - int end_iter; - int n_to_scan = 0; - enum yaffs_block_state state; - int c; - LIST_HEAD(hard_list); - struct yaffs_block_info *bi; - u32 seq_number; - int n_blocks = dev->internal_end_block - dev->internal_start_block + 1; - u8 *chunk_data; - int found_chunks; - int alloc_failed = 0; - struct yaffs_block_index *block_index = NULL; - int alt_block_index = 0; - int summary_available; - - yaffs_trace(YAFFS_TRACE_SCAN, - "yaffs2_scan_backwards starts intstartblk %d intendblk %d...", - dev->internal_start_block, dev->internal_end_block); - - dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER; - - block_index = - kmalloc(n_blocks * sizeof(struct yaffs_block_index), GFP_NOFS); - - if (!block_index) { - block_index = - vmalloc(n_blocks * sizeof(struct yaffs_block_index)); - alt_block_index = 1; - } - - if (!block_index) { - yaffs_trace(YAFFS_TRACE_SCAN, - "yaffs2_scan_backwards() could not allocate block index!" - ); - return YAFFS_FAIL; - } - - dev->blocks_in_checkpt = 0; - - chunk_data = yaffs_get_temp_buffer(dev); - - /* Scan all the blocks to determine their state */ - bi = dev->block_info; - for (blk = dev->internal_start_block; blk <= dev->internal_end_block; - blk++) { - yaffs_clear_chunk_bits(dev, blk); - bi->pages_in_use = 0; - bi->soft_del_pages = 0; - - yaffs_query_init_block_state(dev, blk, &state, &seq_number); - - bi->block_state = state; - bi->seq_number = seq_number; - - if (bi->seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA) - bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT; - if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK) - bi->block_state = YAFFS_BLOCK_STATE_DEAD; - - yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, - "Block scanning block %d state %d seq %d", - blk, bi->block_state, seq_number); - - if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) { - dev->blocks_in_checkpt++; - - } else if (bi->block_state == YAFFS_BLOCK_STATE_DEAD) { - yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, - "block %d is bad", blk); - } else if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) { - yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty "); - dev->n_erased_blocks++; - dev->n_free_chunks += dev->param.chunks_per_block; - } else if (bi->block_state == - YAFFS_BLOCK_STATE_NEEDS_SCAN) { - /* Determine the highest sequence number */ - if (seq_number >= YAFFS_LOWEST_SEQUENCE_NUMBER && - seq_number < YAFFS_HIGHEST_SEQUENCE_NUMBER) { - block_index[n_to_scan].seq = seq_number; - block_index[n_to_scan].block = blk; - n_to_scan++; - if (seq_number >= dev->seq_number) - dev->seq_number = seq_number; - } else { - /* TODO: Nasty sequence number! */ - yaffs_trace(YAFFS_TRACE_SCAN, - "Block scanning block %d has bad sequence number %d", - blk, seq_number); - } - } - bi++; - } - - yaffs_trace(YAFFS_TRACE_SCAN, "%d blocks to be sorted...", n_to_scan); - - cond_resched(); - - /* Sort the blocks by sequence number */ - sort(block_index, n_to_scan, sizeof(struct yaffs_block_index), - yaffs2_ybicmp, NULL); - - cond_resched(); - - yaffs_trace(YAFFS_TRACE_SCAN, "...done"); - - /* Now scan the blocks looking at the data. */ - start_iter = 0; - end_iter = n_to_scan - 1; - yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "%d blocks to scan", n_to_scan); - - /* For each block.... backwards */ - for (block_iter = end_iter; - !alloc_failed && block_iter >= start_iter; - block_iter--) { - /* Cooperative multitasking! This loop can run for so - long that watchdog timers expire. */ - cond_resched(); - - /* get the block to scan in the correct order */ - blk = block_index[block_iter].block; - bi = yaffs_get_block_info(dev, blk); - - summary_available = yaffs_summary_read(dev, dev->sum_tags, blk); - - /* For each chunk in each block that needs scanning.... */ - found_chunks = 0; - if (summary_available) - c = dev->chunks_per_summary - 1; - else - c = dev->param.chunks_per_block - 1; - - for (/* c is already initialised */; - !alloc_failed && c >= 0 && - (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN || - bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING); - c--) { - /* Scan backwards... - * Read the tags and decide what to do - */ - if (yaffs2_scan_chunk(dev, bi, blk, c, - &found_chunks, chunk_data, - &hard_list, summary_available) == - YAFFS_FAIL) - alloc_failed = 1; - } - - if (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN) { - /* If we got this far while scanning, then the block - * is fully allocated. */ - bi->block_state = YAFFS_BLOCK_STATE_FULL; - } - - /* Now let's see if it was dirty */ - if (bi->pages_in_use == 0 && - !bi->has_shrink_hdr && - bi->block_state == YAFFS_BLOCK_STATE_FULL) { - yaffs_block_became_dirty(dev, blk); - } - } - - yaffs_skip_rest_of_block(dev); - - if (alt_block_index) - vfree(block_index); - else - kfree(block_index); - - /* Ok, we've done all the scanning. - * Fix up the hard link chains. - * We have scanned all the objects, now it's time to add these - * hardlinks. - */ - yaffs_link_fixup(dev, &hard_list); - - yaffs_release_temp_buffer(dev, chunk_data); - - if (alloc_failed) - return YAFFS_FAIL; - - yaffs_trace(YAFFS_TRACE_SCAN, "yaffs2_scan_backwards ends"); - - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_yaffs2.h b/fs/yaffs2/yaffs_yaffs2.h deleted file mode 100644 index 2363bfd8bca..00000000000 --- a/fs/yaffs2/yaffs_yaffs2.h +++ /dev/null @@ -1,39 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_YAFFS2_H__ -#define __YAFFS_YAFFS2_H__ - -#include "yaffs_guts.h" - -void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev); -void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev); -void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev, - struct yaffs_block_info *bi); -void yaffs2_update_oldest_dirty_seq(struct yaffs_dev *dev, unsigned block_no, - struct yaffs_block_info *bi); -int yaffs_block_ok_for_gc(struct yaffs_dev *dev, struct yaffs_block_info *bi); -u32 yaffs2_find_refresh_block(struct yaffs_dev *dev); -int yaffs2_checkpt_required(struct yaffs_dev *dev); -int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev); - -void yaffs2_checkpt_invalidate(struct yaffs_dev *dev); -int yaffs2_checkpt_save(struct yaffs_dev *dev); -int yaffs2_checkpt_restore(struct yaffs_dev *dev); - -int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size); -int yaffs2_scan_backwards(struct yaffs_dev *dev); - -#endif diff --git a/fs/yaffs2/yaffscfg.h b/fs/yaffs2/yaffscfg.h deleted file mode 100644 index 4f723d6480c..00000000000 --- a/fs/yaffs2/yaffscfg.h +++ /dev/null @@ -1,34 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* - * Header file for using yaffs in an application via - * a direct interface. - */ - -#ifndef __YAFFSCFG_H__ -#define __YAFFSCFG_H__ - -#include "yportenv.h" - -#define YAFFSFS_N_HANDLES 100 -#define YAFFSFS_N_DSC 20 - -struct yaffsfs_DeviceConfiguration { - const YCHAR *prefix; - struct yaffs_dev *dev; -}; - -#endif diff --git a/fs/yaffs2/yaffsfs.c b/fs/yaffs2/yaffsfs.c deleted file mode 100644 index c4909af9fc5..00000000000 --- a/fs/yaffs2/yaffsfs.c +++ /dev/null @@ -1,3208 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <div64.h> -#include "yaffsfs.h" -#include "yaffs_guts.h" -#include "yaffscfg.h" -#include "yportenv.h" -#include "yaffs_trace.h" -#include <dm/devres.h> - -#define YAFFSFS_MAX_SYMLINK_DEREFERENCES 5 - -#ifndef NULL -#define NULL ((void *)0) -#endif - -/* YAFFSFS_RW_SIZE must be a power of 2 */ -#define YAFFSFS_RW_SHIFT (13) -#define YAFFSFS_RW_SIZE (1<<YAFFSFS_RW_SHIFT) - -/* Some forward references */ -static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relativeDirectory, - const YCHAR *path, - int symDepth, int getEquiv, - struct yaffs_obj **dirOut, - int *notDir, int *loop); - -static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj); - -unsigned int yaffs_wr_attempts; - -/* - * Handle management. - * There are open inodes in struct yaffsfs_Inode. - * There are open file descriptors in yaffsfs_FileDes. - * There are open handles in yaffsfs_FileDes. - * - * Things are structured this way to be like the Linux VFS model - * so that interactions with the yaffs guts calls are similar. - * That means more common code paths and less special code. - * That means better testing etc. - * - * We have 3 layers because: - * A handle is different than an fd because you can use dup() - * to create a new handle that accesses the *same* fd. The two - * handles will use the same offset (part of the fd). We only close - * down the fd when there are no more handles accessing it. - * - * More than one fd can currently access one file, but each fd - * has its own permsiions and offset. - */ - -struct yaffsfs_Inode { - int count; /* Number of handles accessing this inode */ - struct yaffs_obj *iObj; -}; - -struct yaffsfs_FileDes { - u8 reading:1; - u8 writing:1; - u8 append:1; - u8 shareRead:1; - u8 shareWrite:1; - int inodeId:12; /* Index to corresponding yaffsfs_Inode */ - int handleCount:10; /* Number of handles for this fd */ - loff_t position; /* current position in file */ -}; - -struct yaffsfs_Handle { - short int fdId; - short int useCount; -}; - -struct yaffsfs_DirSearchContxt { - struct yaffs_dirent de; /* directory entry */ - YCHAR name[NAME_MAX + 1]; /* name of directory being searched */ - struct yaffs_obj *dirObj; /* ptr to directory being searched */ - struct yaffs_obj *nextReturn; /* obj returned by next readddir */ - struct list_head others; - int offset:20; - unsigned inUse:1; -}; - -static struct yaffsfs_DirSearchContxt yaffsfs_dsc[YAFFSFS_N_DSC]; -static struct yaffsfs_Inode yaffsfs_inode[YAFFSFS_N_HANDLES]; -static struct yaffsfs_FileDes yaffsfs_fd[YAFFSFS_N_HANDLES]; -static struct yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES]; - -static int yaffsfs_handlesInitialised; - -unsigned yaffs_set_trace(unsigned tm) -{ - yaffs_trace_mask = tm; - return yaffs_trace_mask; -} - -unsigned yaffs_get_trace(void) -{ - return yaffs_trace_mask; -} - -/* - * yaffsfs_InitHandle - * Inilitalise handle management on start-up. - */ - -static void yaffsfs_InitHandles(void) -{ - int i; - if (yaffsfs_handlesInitialised) - return; - - memset(yaffsfs_inode, 0, sizeof(yaffsfs_inode)); - memset(yaffsfs_fd, 0, sizeof(yaffsfs_fd)); - memset(yaffsfs_handle, 0, sizeof(yaffsfs_handle)); - memset(yaffsfs_dsc, 0, sizeof(yaffsfs_dsc)); - - for (i = 0; i < YAFFSFS_N_HANDLES; i++) - yaffsfs_fd[i].inodeId = -1; - for (i = 0; i < YAFFSFS_N_HANDLES; i++) - yaffsfs_handle[i].fdId = -1; -} - -static struct yaffsfs_Handle *yaffsfs_HandleToPointer(int h) -{ - if (h >= 0 && h < YAFFSFS_N_HANDLES) - return &yaffsfs_handle[h]; - return NULL; -} - -static struct yaffsfs_FileDes *yaffsfs_HandleToFileDes(int handle) -{ - struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle); - - if (h && h->useCount > 0 && h->fdId >= 0 && h->fdId < YAFFSFS_N_HANDLES) - return &yaffsfs_fd[h->fdId]; - - return NULL; -} - -static struct yaffsfs_Inode *yaffsfs_HandleToInode(int handle) -{ - struct yaffsfs_FileDes *fd = yaffsfs_HandleToFileDes(handle); - - if (fd && fd->handleCount > 0 && - fd->inodeId >= 0 && fd->inodeId < YAFFSFS_N_HANDLES) - return &yaffsfs_inode[fd->inodeId]; - - return NULL; -} - -static struct yaffs_obj *yaffsfs_HandleToObject(int handle) -{ - struct yaffsfs_Inode *in = yaffsfs_HandleToInode(handle); - - if (in) - return in->iObj; - - return NULL; -} - -/* - * yaffsfs_FindInodeIdForObject - * Find the inode entry for an object, if it exists. - */ - -static int yaffsfs_FindInodeIdForObject(struct yaffs_obj *obj) -{ - int i; - int ret = -1; - - if (obj) - obj = yaffs_get_equivalent_obj(obj); - - /* Look for it in open inode table */ - for (i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++) { - if (yaffsfs_inode[i].iObj == obj) - ret = i; - } - return ret; -} - -/* - * yaffsfs_GetInodeIdForObject - * Grab an inode entry when opening a new inode. - */ -static int yaffsfs_GetInodeIdForObject(struct yaffs_obj *obj) -{ - int i; - int ret; - struct yaffsfs_Inode *in = NULL; - - if (obj) - obj = yaffs_get_equivalent_obj(obj); - - ret = yaffsfs_FindInodeIdForObject(obj); - - for (i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++) { - if (!yaffsfs_inode[i].iObj) - ret = i; - } - - if (ret >= 0) { - in = &yaffsfs_inode[ret]; - if (!in->iObj) - in->count = 0; - in->iObj = obj; - in->count++; - } - - return ret; -} - -static int yaffsfs_CountHandles(struct yaffs_obj *obj) -{ - int i = yaffsfs_FindInodeIdForObject(obj); - - if (i >= 0) - return yaffsfs_inode[i].count; - else - return 0; -} - -static void yaffsfs_ReleaseInode(struct yaffsfs_Inode *in) -{ - struct yaffs_obj *obj; - - obj = in->iObj; - - if (obj->unlinked) - yaffs_del_obj(obj); - - obj->my_inode = NULL; - in->iObj = NULL; - -} - -static void yaffsfs_PutInode(int inodeId) -{ - if (inodeId >= 0 && inodeId < YAFFSFS_N_HANDLES) { - struct yaffsfs_Inode *in = &yaffsfs_inode[inodeId]; - in->count--; - if (in->count <= 0) { - yaffsfs_ReleaseInode(in); - in->count = 0; - } - } -} - -static int yaffsfs_NewHandle(struct yaffsfs_Handle **hptr) -{ - int i; - struct yaffsfs_Handle *h; - - for (i = 0; i < YAFFSFS_N_HANDLES; i++) { - h = &yaffsfs_handle[i]; - if (h->useCount < 1) { - memset(h, 0, sizeof(struct yaffsfs_Handle)); - h->fdId = -1; - h->useCount = 1; - if (hptr) - *hptr = h; - return i; - } - } - return -1; -} - -static int yaffsfs_NewHandleAndFileDes(void) -{ - int i; - struct yaffsfs_FileDes *fd; - struct yaffsfs_Handle *h = NULL; - int handle = yaffsfs_NewHandle(&h); - - if (handle < 0) - return -1; - - for (i = 0; i < YAFFSFS_N_HANDLES; i++) { - fd = &yaffsfs_fd[i]; - if (fd->handleCount < 1) { - memset(fd, 0, sizeof(struct yaffsfs_FileDes)); - fd->inodeId = -1; - fd->handleCount = 1; - h->fdId = i; - return handle; - } - } - - /* Dump the handle because we could not get a fd */ - h->useCount = 0; - return -1; -} - -/* - * yaffs_get_handle - * Increase use of handle when reading/writing a file - * Also gets the file descriptor. - */ - -static int yaffsfs_GetHandle(int handle) -{ - struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle); - - if (h && h->useCount > 0) { - h->useCount++; - return 0; - } - return -1; -} - -/* - * yaffs_put_handle - * Let go of a handle when closing a file or aborting an open or - * ending a read or write. - */ - -static int yaffsfs_PutFileDes(int fdId) -{ - struct yaffsfs_FileDes *fd; - - if (fdId >= 0 && fdId < YAFFSFS_N_HANDLES) { - fd = &yaffsfs_fd[fdId]; - fd->handleCount--; - if (fd->handleCount < 1) { - if (fd->inodeId >= 0) { - yaffsfs_PutInode(fd->inodeId); - fd->inodeId = -1; - } - } - } - return 0; -} - -static int yaffsfs_PutHandle(int handle) -{ - struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle); - - if (h && h->useCount > 0) { - h->useCount--; - if (h->useCount < 1) { - yaffsfs_PutFileDes(h->fdId); - h->fdId = -1; - } - } - - return 0; -} - -static void yaffsfs_BreakDeviceHandles(struct yaffs_dev *dev) -{ - struct yaffsfs_FileDes *fd; - struct yaffsfs_Handle *h; - struct yaffs_obj *obj; - int i; - for (i = 0; i < YAFFSFS_N_HANDLES; i++) { - h = yaffsfs_HandleToPointer(i); - fd = yaffsfs_HandleToFileDes(i); - obj = yaffsfs_HandleToObject(i); - if (h && h->useCount > 0) { - h->useCount = 0; - h->fdId = 0; - } - if (fd && fd->handleCount > 0 && obj && obj->my_dev == dev) { - fd->handleCount = 0; - yaffsfs_PutInode(fd->inodeId); - fd->inodeId = -1; - } - } -} - -/* - * Stuff to handle names. - */ -#ifdef CONFIG_YAFFS_CASE_INSENSITIVE - -static int yaffs_toupper(YCHAR a) -{ - if (a >= 'a' && a <= 'z') - return (a - 'a') + 'A'; - else - return a; -} - -int yaffsfs_Match(YCHAR a, YCHAR b) -{ - return (yaffs_toupper(a) == yaffs_toupper(b)); -} -#else -int yaffsfs_Match(YCHAR a, YCHAR b) -{ - /* case sensitive */ - return (a == b); -} -#endif - -int yaffsfs_IsPathDivider(YCHAR ch) -{ - const YCHAR *str = YAFFS_PATH_DIVIDERS; - - while (*str) { - if (*str == ch) - return 1; - str++; - } - - return 0; -} - -int yaffsfs_CheckNameLength(const char *name) -{ - int retVal = 0; - - int nameLength = yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH + 1); - - if (nameLength == 0) { - yaffsfs_SetError(-ENOENT); - retVal = -1; - } else if (nameLength > YAFFS_MAX_NAME_LENGTH) { - yaffsfs_SetError(-ENAMETOOLONG); - retVal = -1; - } - - return retVal; -} - -static int yaffsfs_alt_dir_path(const YCHAR *path, YCHAR **ret_path) -{ - YCHAR *alt_path = NULL; - int path_length; - int i; - - /* - * We don't have a definition for max path length. - * We will use 3 * max name length instead. - */ - *ret_path = NULL; - path_length = yaffs_strnlen(path, (YAFFS_MAX_NAME_LENGTH + 1) * 3 + 1); - - /* If the last character is a path divider, then we need to - * trim it back so that the name look-up works properly. - * eg. /foo/new_dir/ -> /foo/newdir - * Curveball: Need to handle multiple path dividers: - * eg. /foof/sdfse///// -> /foo/sdfse - */ - if (path_length > 0 && yaffsfs_IsPathDivider(path[path_length - 1])) { - alt_path = kmalloc(path_length + 1, 0); - if (!alt_path) - return -1; - yaffs_strcpy(alt_path, path); - for (i = path_length - 1; - i >= 0 && yaffsfs_IsPathDivider(alt_path[i]); i--) - alt_path[i] = (YCHAR) 0; - } - *ret_path = alt_path; - return 0; -} - -static LIST_HEAD(yaffsfs_deviceList); - -/* - * yaffsfs_FindDevice - * yaffsfs_FindRoot - * Scan the configuration list to find the device - * Curveballs: Should match paths that end in '/' too - * Curveball2 Might have "/x/ and "/x/y". Need to return the longest match - */ -static struct yaffs_dev *yaffsfs_FindDevice(const YCHAR *path, - YCHAR **restOfPath) -{ - struct list_head *cfg; - const YCHAR *leftOver; - const YCHAR *p; - struct yaffs_dev *retval = NULL; - struct yaffs_dev *dev = NULL; - int thisMatchLength; - int longestMatch = -1; - int matching; - - /* - * Check all configs, choose the one that: - * 1) Actually matches a prefix (ie /a amd /abc will not match - * 2) Matches the longest. - */ - list_for_each(cfg, &yaffsfs_deviceList) { - dev = list_entry(cfg, struct yaffs_dev, dev_list); - leftOver = path; - p = dev->param.name; - thisMatchLength = 0; - matching = 1; - - while (matching && *p && *leftOver) { - /* Skip over any /s */ - while (yaffsfs_IsPathDivider(*p)) - p++; - - /* Skip over any /s */ - while (yaffsfs_IsPathDivider(*leftOver)) - leftOver++; - - /* Now match the text part */ - while (matching && - *p && !yaffsfs_IsPathDivider(*p) && - *leftOver && !yaffsfs_IsPathDivider(*leftOver)) { - if (yaffsfs_Match(*p, *leftOver)) { - p++; - leftOver++; - thisMatchLength++; - } else { - matching = 0; - } - } - } - - /* Skip over any /s in leftOver */ - while (yaffsfs_IsPathDivider(*leftOver)) - leftOver++; - - /*Skip over any /s in p */ - while (yaffsfs_IsPathDivider(*p)) - p++; - - /* p should now be at the end of the string if fully matched */ - if (*p) - matching = 0; - - if (matching && (thisMatchLength > longestMatch)) { - /* Matched prefix */ - *restOfPath = (YCHAR *) leftOver; - retval = dev; - longestMatch = thisMatchLength; - } - - } - return retval; -} - -static int yaffsfs_CheckPath(const YCHAR *path) -{ - int n = 0; - int divs = 0; - - while (*path && n < YAFFS_MAX_NAME_LENGTH && divs < 100) { - if (yaffsfs_IsPathDivider(*path)) { - n = 0; - divs++; - } else - n++; - path++; - } - - return (*path) ? -1 : 0; -} - -/* FindMountPoint only returns a dev entry if the path is a mount point */ -static struct yaffs_dev *yaffsfs_FindMountPoint(const YCHAR *path) -{ - struct yaffs_dev *dev; - YCHAR *restOfPath = NULL; - - dev = yaffsfs_FindDevice(path, &restOfPath); - if (dev && restOfPath && *restOfPath) - dev = NULL; - return dev; -} - -static struct yaffs_obj *yaffsfs_FindRoot(const YCHAR *path, - YCHAR **restOfPath) -{ - struct yaffs_dev *dev; - - dev = yaffsfs_FindDevice(path, restOfPath); - if (dev && dev->is_mounted) - return dev->root_dir; - - return NULL; -} - -static struct yaffs_obj *yaffsfs_FollowLink(struct yaffs_obj *obj, - int symDepth, int *loop) -{ - - if (obj) - obj = yaffs_get_equivalent_obj(obj); - - while (obj && obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) { - YCHAR *alias = obj->variant.symlink_variant.alias; - - if (yaffsfs_IsPathDivider(*alias)) - /* Starts with a /, need to scan from root up */ - obj = yaffsfs_FindObject(NULL, alias, symDepth++, - 1, NULL, NULL, loop); - else - /* - * Relative to here so use the parent of the - * symlink as a start - */ - obj = yaffsfs_FindObject(obj->parent, alias, symDepth++, - 1, NULL, NULL, loop); - } - return obj; -} - -/* - * yaffsfs_FindDirectory - * Parse a path to determine the directory and the name within the directory. - * - * eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx" - */ -static struct yaffs_obj *yaffsfs_DoFindDirectory(struct yaffs_obj *startDir, - const YCHAR *path, - YCHAR **name, int symDepth, - int *notDir, int *loop) -{ - struct yaffs_obj *dir; - YCHAR *restOfPath; - YCHAR str[YAFFS_MAX_NAME_LENGTH + 1]; - int i; - - if (symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES) { - if (loop) - *loop = 1; - return NULL; - } - - if (startDir) { - dir = startDir; - restOfPath = (YCHAR *) path; - } else - dir = yaffsfs_FindRoot(path, &restOfPath); - - while (dir) { - /* - * parse off /. - * curve ball: also throw away surplus '/' - * eg. "/ram/x////ff" gets treated the same as "/ram/x/ff" - */ - while (yaffsfs_IsPathDivider(*restOfPath)) - restOfPath++; /* get rid of '/' */ - - *name = restOfPath; - i = 0; - - while (*restOfPath && !yaffsfs_IsPathDivider(*restOfPath)) { - if (i < YAFFS_MAX_NAME_LENGTH) { - str[i] = *restOfPath; - str[i + 1] = '\0'; - i++; - } - restOfPath++; - } - - if (!*restOfPath) - /* got to the end of the string */ - return dir; - else { - if (yaffs_strcmp(str, _Y(".")) == 0) { - /* Do nothing */ - } else if (yaffs_strcmp(str, _Y("..")) == 0) { - dir = dir->parent; - } else { - dir = yaffs_find_by_name(dir, str); - - dir = yaffsfs_FollowLink(dir, symDepth, loop); - - if (dir && dir->variant_type != - YAFFS_OBJECT_TYPE_DIRECTORY) { - if (notDir) - *notDir = 1; - dir = NULL; - } - - } - } - } - /* directory did not exist. */ - return NULL; -} - -static struct yaffs_obj *yaffsfs_FindDirectory(struct yaffs_obj *relDir, - const YCHAR *path, - YCHAR **name, - int symDepth, - int *notDir, int *loop) -{ - return yaffsfs_DoFindDirectory(relDir, path, name, symDepth, notDir, - loop); -} - -/* - * yaffsfs_FindObject turns a path for an existing object into the object - */ -static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relDir, - const YCHAR *path, int symDepth, - int getEquiv, - struct yaffs_obj **dirOut, - int *notDir, int *loop) -{ - struct yaffs_obj *dir; - struct yaffs_obj *obj; - YCHAR *name; - - dir = - yaffsfs_FindDirectory(relDir, path, &name, symDepth, notDir, loop); - - if (dirOut) - *dirOut = dir; - - if (dir && *name) - obj = yaffs_find_by_name(dir, name); - else - obj = dir; - - if (getEquiv) - obj = yaffs_get_equivalent_obj(obj); - - return obj; -} - -/************************************************************************* - * Start of yaffsfs visible functions. - *************************************************************************/ - -int yaffs_dup(int handle) -{ - int newHandleNumber = -1; - struct yaffsfs_FileDes *existingFD = NULL; - struct yaffsfs_Handle *existingHandle = NULL; - struct yaffsfs_Handle *newHandle = NULL; - - yaffsfs_Lock(); - existingHandle = yaffsfs_HandleToPointer(handle); - existingFD = yaffsfs_HandleToFileDes(handle); - if (existingFD) - newHandleNumber = yaffsfs_NewHandle(&newHandle); - if (newHandle) { - newHandle->fdId = existingHandle->fdId; - existingFD->handleCount++; - } - - yaffsfs_Unlock(); - - if (!existingFD) - yaffsfs_SetError(-EBADF); - else if (!newHandle) - yaffsfs_SetError(-ENOMEM); - - return newHandleNumber; - -} - -static int yaffsfs_TooManyObjects(struct yaffs_dev *dev) -{ - int current_objects = dev->n_obj - dev->n_deleted_files; - - if (dev->param.max_objects && current_objects > dev->param.max_objects) - return 1; - else - return 0; -} - -int yaffs_open_sharing(const YCHAR *path, int oflag, int mode, int sharing) -{ - struct yaffs_obj *obj = NULL; - struct yaffs_obj *dir = NULL; - YCHAR *name; - int handle = -1; - struct yaffsfs_FileDes *fd = NULL; - int openDenied = 0; - int symDepth = 0; - int errorReported = 0; - int rwflags = oflag & (O_RDWR | O_RDONLY | O_WRONLY); - u8 shareRead = (sharing & YAFFS_SHARE_READ) ? 1 : 0; - u8 shareWrite = (sharing & YAFFS_SHARE_WRITE) ? 1 : 0; - u8 sharedReadAllowed; - u8 sharedWriteAllowed; - u8 alreadyReading; - u8 alreadyWriting; - u8 readRequested; - u8 writeRequested; - int notDir = 0; - int loop = 0; - - if (!path) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - /* O_EXCL only has meaning if O_CREAT is specified */ - if (!(oflag & O_CREAT)) - oflag &= ~(O_EXCL); - - /* O_TRUNC has no meaning if (O_CREAT | O_EXCL) is specified */ - if ((oflag & O_CREAT) & (oflag & O_EXCL)) - oflag &= ~(O_TRUNC); - - /* Todo: Are there any more flag combos to sanitise ? */ - - /* Figure out if reading or writing is requested */ - - readRequested = (rwflags == O_RDWR || rwflags == O_RDONLY) ? 1 : 0; - writeRequested = (rwflags == O_RDWR || rwflags == O_WRONLY) ? 1 : 0; - - yaffsfs_Lock(); - - handle = yaffsfs_NewHandleAndFileDes(); - - if (handle < 0) { - yaffsfs_SetError(-ENFILE); - errorReported = 1; - } else { - - fd = yaffsfs_HandleToFileDes(handle); - - /* try to find the exisiting object */ - obj = yaffsfs_FindObject(NULL, path, 0, 1, NULL, NULL, NULL); - - obj = yaffsfs_FollowLink(obj, symDepth++, &loop); - - if (obj && - obj->variant_type != YAFFS_OBJECT_TYPE_FILE && - obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) - obj = NULL; - - if (obj) { - - /* The file already exists or it might be a directory */ - - /* A directory can't be opened as a file */ - if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) { - openDenied = 1; - yaffsfs_SetError(-EISDIR); - errorReported = 1; - } - - /* Open should fail if O_CREAT and O_EXCL are specified - * for a file that exists. - */ - if (!errorReported && - (oflag & O_EXCL) && (oflag & O_CREAT)) { - openDenied = 1; - yaffsfs_SetError(-EEXIST); - errorReported = 1; - } - - /* Check file permissions */ - if (readRequested && !(obj->yst_mode & S_IREAD)) - openDenied = 1; - - if (writeRequested && !(obj->yst_mode & S_IWRITE)) - openDenied = 1; - - if (!errorReported && writeRequested && - obj->my_dev->read_only) { - openDenied = 1; - yaffsfs_SetError(-EROFS); - errorReported = 1; - } - - if (openDenied && !errorReported) { - yaffsfs_SetError(-EACCES); - errorReported = 1; - } - - /* Check sharing of an existing object. */ - if (!openDenied) { - struct yaffsfs_FileDes *fdx; - int i; - - sharedReadAllowed = 1; - sharedWriteAllowed = 1; - alreadyReading = 0; - alreadyWriting = 0; - for (i = 0; i < YAFFSFS_N_HANDLES; i++) { - fdx = &yaffsfs_fd[i]; - if (fdx->handleCount > 0 && - fdx->inodeId >= 0 && - yaffsfs_inode[fdx->inodeId].iObj - == obj) { - if (!fdx->shareRead) - sharedReadAllowed = 0; - if (!fdx->shareWrite) - sharedWriteAllowed = 0; - if (fdx->reading) - alreadyReading = 1; - if (fdx->writing) - alreadyWriting = 1; - } - } - - if ((!sharedReadAllowed && readRequested) || - (!shareRead && alreadyReading) || - (!sharedWriteAllowed && writeRequested) || - (!shareWrite && alreadyWriting)) { - openDenied = 1; - yaffsfs_SetError(-EBUSY); - errorReported = 1; - } - } - - } - - /* If we could not open an existing object, then let's see if - * the directory exists. If not, error. - */ - if (!obj && !errorReported) { - dir = yaffsfs_FindDirectory(NULL, path, &name, 0, - &notDir, &loop); - if (!dir && notDir) { - yaffsfs_SetError(-ENOTDIR); - errorReported = 1; - } else if (loop) { - yaffsfs_SetError(-ELOOP); - errorReported = 1; - } else if (!dir) { - yaffsfs_SetError(-ENOENT); - errorReported = 1; - } - } - - if (!obj && dir && !errorReported && (oflag & O_CREAT)) { - /* Let's see if we can create this file */ - if (dir->my_dev->read_only) { - yaffsfs_SetError(-EROFS); - errorReported = 1; - } else if (yaffsfs_TooManyObjects(dir->my_dev)) { - yaffsfs_SetError(-ENFILE); - errorReported = 1; - } else - obj = yaffs_create_file(dir, name, mode, 0, 0); - - if (!obj && !errorReported) { - yaffsfs_SetError(-ENOSPC); - errorReported = 1; - } - } - - if (!obj && dir && !errorReported && !(oflag & O_CREAT)) { - yaffsfs_SetError(-ENOENT); - errorReported = 1; - } - - if (obj && !openDenied) { - int inodeId = yaffsfs_GetInodeIdForObject(obj); - - if (inodeId < 0) { - /* - * Todo: Fix any problem if inodes run out, - * That can't happen if the number of inode - * items >= number of handles. - */ - } - - fd->inodeId = inodeId; - fd->reading = readRequested; - fd->writing = writeRequested; - fd->append = (oflag & O_APPEND) ? 1 : 0; - fd->position = 0; - fd->shareRead = shareRead; - fd->shareWrite = shareWrite; - - /* Hook inode to object */ - obj->my_inode = (void *)&yaffsfs_inode[inodeId]; - - if ((oflag & O_TRUNC) && fd->writing) - yaffs_resize_file(obj, 0); - } else { - yaffsfs_PutHandle(handle); - if (!errorReported) - yaffsfs_SetError(0); /* Problem */ - handle = -1; - } - } - - yaffsfs_Unlock(); - - return handle; -} - -int yaffs_open(const YCHAR *path, int oflag, int mode) -{ - return yaffs_open_sharing(path, oflag, mode, - YAFFS_SHARE_READ | YAFFS_SHARE_WRITE); -} - -int yaffs_Dofsync(int handle, int datasync) -{ - int retVal = -1; - struct yaffs_obj *obj; - - yaffsfs_Lock(); - - obj = yaffsfs_HandleToObject(handle); - - if (!obj) - yaffsfs_SetError(-EBADF); - else if (obj->my_dev->read_only) - yaffsfs_SetError(-EROFS); - else { - yaffs_flush_file(obj, 1, datasync); - retVal = 0; - } - - yaffsfs_Unlock(); - - return retVal; -} - -int yaffs_fsync(int handle) -{ - return yaffs_Dofsync(handle, 0); -} - -int yaffs_flush(int handle) -{ - return yaffs_fsync(handle); -} - -int yaffs_fdatasync(int handle) -{ - return yaffs_Dofsync(handle, 1); -} - -int yaffs_close(int handle) -{ - struct yaffsfs_Handle *h = NULL; - struct yaffs_obj *obj = NULL; - int retVal = -1; - - yaffsfs_Lock(); - - h = yaffsfs_HandleToPointer(handle); - obj = yaffsfs_HandleToObject(handle); - - if (!h || !obj) - yaffsfs_SetError(-EBADF); - else { - /* clean up */ - yaffs_flush_file(obj, 1, 0); - yaffsfs_PutHandle(handle); - retVal = 0; - } - - yaffsfs_Unlock(); - - return retVal; -} - -int yaffsfs_do_read(int handle, void *vbuf, unsigned int nbyte, - int isPread, loff_t offset) -{ - struct yaffsfs_FileDes *fd = NULL; - struct yaffs_obj *obj = NULL; - loff_t pos = 0; - loff_t startPos = 0; - loff_t endPos = 0; - int nRead = 0; - int nToRead = 0; - int totalRead = 0; - loff_t maxRead; - u8 *buf = (u8 *) vbuf; - - if (!vbuf) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - yaffsfs_Lock(); - fd = yaffsfs_HandleToFileDes(handle); - obj = yaffsfs_HandleToObject(handle); - - if (!fd || !obj) { - /* bad handle */ - yaffsfs_SetError(-EBADF); - totalRead = -1; - } else if (!fd->reading) { - /* Not a reading handle */ - yaffsfs_SetError(-EINVAL); - totalRead = -1; - } else if (nbyte > YAFFS_MAX_FILE_SIZE) { - yaffsfs_SetError(-EINVAL); - totalRead = -1; - } else { - if (isPread) - startPos = offset; - else - startPos = fd->position; - - pos = startPos; - - if (yaffs_get_obj_length(obj) > pos) - maxRead = yaffs_get_obj_length(obj) - pos; - else - maxRead = 0; - - if (nbyte > maxRead) - nbyte = maxRead; - - yaffsfs_GetHandle(handle); - - endPos = pos + nbyte; - - if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE || - nbyte > YAFFS_MAX_FILE_SIZE || - endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) { - totalRead = -1; - nbyte = 0; - } - - while (nbyte > 0) { - nToRead = YAFFSFS_RW_SIZE - - (pos & (YAFFSFS_RW_SIZE - 1)); - if (nToRead > nbyte) - nToRead = nbyte; - - /* Tricky bit... - * Need to reverify object in case the device was - * unmounted in another thread. - */ - obj = yaffsfs_HandleToObject(handle); - if (!obj) - nRead = 0; - else - nRead = yaffs_file_rd(obj, buf, pos, nToRead); - - if (nRead > 0) { - totalRead += nRead; - pos += nRead; - buf += nRead; - } - - if (nRead == nToRead) - nbyte -= nRead; - else - nbyte = 0; /* no more to read */ - - if (nbyte > 0) { - yaffsfs_Unlock(); - yaffsfs_Lock(); - } - - } - - yaffsfs_PutHandle(handle); - - if (!isPread) { - if (totalRead >= 0) - fd->position = startPos + totalRead; - else - yaffsfs_SetError(-EINVAL); - } - - } - - yaffsfs_Unlock(); - - return (totalRead >= 0) ? totalRead : -1; - -} - -int yaffs_read(int handle, void *buf, unsigned int nbyte) -{ - return yaffsfs_do_read(handle, buf, nbyte, 0, 0); -} - -int yaffs_pread(int handle, void *buf, unsigned int nbyte, loff_t offset) -{ - return yaffsfs_do_read(handle, buf, nbyte, 1, offset); -} - -int yaffsfs_do_write(int handle, const void *vbuf, unsigned int nbyte, - int isPwrite, loff_t offset) -{ - struct yaffsfs_FileDes *fd = NULL; - struct yaffs_obj *obj = NULL; - loff_t pos = 0; - loff_t startPos = 0; - loff_t endPos; - int nWritten = 0; - int totalWritten = 0; - int write_trhrough = 0; - int nToWrite = 0; - const u8 *buf = (const u8 *)vbuf; - - if (!vbuf) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - yaffsfs_Lock(); - fd = yaffsfs_HandleToFileDes(handle); - obj = yaffsfs_HandleToObject(handle); - - if (!fd || !obj) { - /* bad handle */ - yaffsfs_SetError(-EBADF); - totalWritten = -1; - } else if (!fd->writing) { - yaffsfs_SetError(-EINVAL); - totalWritten = -1; - } else if (obj->my_dev->read_only) { - yaffsfs_SetError(-EROFS); - totalWritten = -1; - } else { - if (fd->append) - startPos = yaffs_get_obj_length(obj); - else if (isPwrite) - startPos = offset; - else - startPos = fd->position; - - yaffsfs_GetHandle(handle); - pos = startPos; - endPos = pos + nbyte; - - if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE || - nbyte > YAFFS_MAX_FILE_SIZE || - endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) { - totalWritten = -1; - nbyte = 0; - } - - while (nbyte > 0) { - - nToWrite = YAFFSFS_RW_SIZE - - (pos & (YAFFSFS_RW_SIZE - 1)); - if (nToWrite > nbyte) - nToWrite = nbyte; - - /* Tricky bit... - * Need to reverify object in case the device was - * remounted or unmounted in another thread. - */ - obj = yaffsfs_HandleToObject(handle); - if (!obj || obj->my_dev->read_only) - nWritten = 0; - else - nWritten = - yaffs_wr_file(obj, buf, pos, nToWrite, - write_trhrough); - if (nWritten > 0) { - totalWritten += nWritten; - pos += nWritten; - buf += nWritten; - } - - if (nWritten == nToWrite) - nbyte -= nToWrite; - else - nbyte = 0; - - if (nWritten < 1 && totalWritten < 1) { - yaffsfs_SetError(-ENOSPC); - totalWritten = -1; - } - - if (nbyte > 0) { - yaffsfs_Unlock(); - yaffsfs_Lock(); - } - } - - yaffsfs_PutHandle(handle); - - if (!isPwrite) { - if (totalWritten > 0) - fd->position = startPos + totalWritten; - else - yaffsfs_SetError(-EINVAL); - } - } - - yaffsfs_Unlock(); - - return (totalWritten >= 0) ? totalWritten : -1; -} - -int yaffs_write(int fd, const void *buf, unsigned int nbyte) -{ - return yaffsfs_do_write(fd, buf, nbyte, 0, 0); -} - -int yaffs_pwrite(int fd, const void *buf, unsigned int nbyte, loff_t offset) -{ - return yaffsfs_do_write(fd, buf, nbyte, 1, offset); -} - -int yaffs_truncate(const YCHAR *path, loff_t new_size) -{ - struct yaffs_obj *obj = NULL; - struct yaffs_obj *dir = NULL; - int result = YAFFS_FAIL; - int notDir = 0; - int loop = 0; - - if (!path) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop); - obj = yaffsfs_FollowLink(obj, 0, &loop); - - if (!dir && notDir) - yaffsfs_SetError(-ENOTDIR); - else if (loop) - yaffsfs_SetError(-ELOOP); - else if (!dir || !obj) - yaffsfs_SetError(-ENOENT); - else if (obj->my_dev->read_only) - yaffsfs_SetError(-EROFS); - else if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE) - yaffsfs_SetError(-EISDIR); - else if (obj->my_dev->read_only) - yaffsfs_SetError(-EROFS); - else if (new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE) - yaffsfs_SetError(-EINVAL); - else - result = yaffs_resize_file(obj, new_size); - - yaffsfs_Unlock(); - - return (result) ? 0 : -1; -} - -int yaffs_ftruncate(int handle, loff_t new_size) -{ - struct yaffsfs_FileDes *fd = NULL; - struct yaffs_obj *obj = NULL; - int result = 0; - - yaffsfs_Lock(); - fd = yaffsfs_HandleToFileDes(handle); - obj = yaffsfs_HandleToObject(handle); - - if (!fd || !obj) - /* bad handle */ - yaffsfs_SetError(-EBADF); - else if (!fd->writing) - yaffsfs_SetError(-EINVAL); - else if (obj->my_dev->read_only) - yaffsfs_SetError(-EROFS); - else if (new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE) - yaffsfs_SetError(-EINVAL); - else - /* resize the file */ - result = yaffs_resize_file(obj, new_size); - yaffsfs_Unlock(); - - return (result) ? 0 : -1; - -} - -loff_t yaffs_lseek(int handle, loff_t offset, int whence) -{ - struct yaffsfs_FileDes *fd = NULL; - struct yaffs_obj *obj = NULL; - loff_t pos = -1; - loff_t fSize = -1; - - yaffsfs_Lock(); - fd = yaffsfs_HandleToFileDes(handle); - obj = yaffsfs_HandleToObject(handle); - - if (!fd || !obj) - yaffsfs_SetError(-EBADF); - else if (offset > YAFFS_MAX_FILE_SIZE) - yaffsfs_SetError(-EINVAL); - else { - if (whence == SEEK_SET) { - if (offset >= 0) - pos = offset; - } else if (whence == SEEK_CUR) { - if ((fd->position + offset) >= 0) - pos = (fd->position + offset); - } else if (whence == SEEK_END) { - fSize = yaffs_get_obj_length(obj); - if (fSize >= 0 && (fSize + offset) >= 0) - pos = fSize + offset; - } - - if (pos >= 0 && pos <= YAFFS_MAX_FILE_SIZE) - fd->position = pos; - else { - yaffsfs_SetError(-EINVAL); - pos = -1; - } - } - - yaffsfs_Unlock(); - - return pos; -} - -int yaffsfs_DoUnlink(const YCHAR *path, int isDirectory) -{ - struct yaffs_obj *dir = NULL; - struct yaffs_obj *obj = NULL; - YCHAR *name; - int result = YAFFS_FAIL; - int notDir = 0; - int loop = 0; - - if (!path) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL, path, 0, 0, NULL, NULL, NULL); - dir = yaffsfs_FindDirectory(NULL, path, &name, 0, &notDir, &loop); - - if (!dir && notDir) - yaffsfs_SetError(-ENOTDIR); - else if (loop) - yaffsfs_SetError(-ELOOP); - else if (!dir) - yaffsfs_SetError(-ENOENT); - else if (yaffs_strncmp(name, _Y("."), 2) == 0) - yaffsfs_SetError(-EINVAL); - else if (!obj) - yaffsfs_SetError(-ENOENT); - else if (obj->my_dev->read_only) - yaffsfs_SetError(-EROFS); - else if (!isDirectory && - obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) - yaffsfs_SetError(-EISDIR); - else if (isDirectory && - obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) - yaffsfs_SetError(-ENOTDIR); - else if (isDirectory && obj == obj->my_dev->root_dir) - yaffsfs_SetError(-EBUSY); /* Can't rmdir a root */ - else { - result = yaffs_unlinker(dir, name); - - if (result == YAFFS_FAIL && isDirectory) - yaffsfs_SetError(-ENOTEMPTY); - } - - yaffsfs_Unlock(); - - return (result == YAFFS_FAIL) ? -1 : 0; -} - -int yaffs_unlink(const YCHAR *path) -{ - return yaffsfs_DoUnlink(path, 0); -} - -int yaffs_rename(const YCHAR *oldPath, const YCHAR *newPath) -{ - struct yaffs_obj *olddir = NULL; - struct yaffs_obj *newdir = NULL; - struct yaffs_obj *obj = NULL; - struct yaffs_obj *newobj = NULL; - YCHAR *oldname; - YCHAR *newname; - int result = YAFFS_FAIL; - int rename_allowed = 1; - int notOldDir = 0; - int notNewDir = 0; - int oldLoop = 0; - int newLoop = 0; - - YCHAR *alt_newpath = NULL; - - if (!oldPath || !newPath) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(oldPath) < 0 || yaffsfs_CheckPath(newPath) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - if (yaffsfs_alt_dir_path(newPath, &alt_newpath) < 0) { - yaffsfs_SetError(-ENOMEM); - return -1; - } - if (alt_newpath) - newPath = alt_newpath; - - yaffsfs_Lock(); - - olddir = yaffsfs_FindDirectory(NULL, oldPath, &oldname, 0, - &notOldDir, &oldLoop); - newdir = yaffsfs_FindDirectory(NULL, newPath, &newname, 0, - &notNewDir, &newLoop); - obj = yaffsfs_FindObject(NULL, oldPath, 0, 0, NULL, NULL, NULL); - newobj = yaffsfs_FindObject(NULL, newPath, 0, 0, NULL, NULL, NULL); - - /* If the object being renamed is a directory and the - * path ended with a "/" then the olddir == obj. - * We pass through NULL for the old name to tell the lower layers - * to use olddir as the object. - */ - - if (olddir == obj) - oldname = NULL; - - if ((!olddir && notOldDir) || (!newdir && notNewDir)) { - yaffsfs_SetError(-ENOTDIR); - rename_allowed = 0; - } else if (oldLoop || newLoop) { - yaffsfs_SetError(-ELOOP); - rename_allowed = 0; - } else if (olddir && oldname && - yaffs_strncmp(oldname, _Y("."), 2) == 0) { - yaffsfs_SetError(-EINVAL); - rename_allowed = 0; - } else if (!olddir || !newdir || !obj) { - yaffsfs_SetError(-ENOENT); - rename_allowed = 0; - } else if (obj->my_dev->read_only) { - yaffsfs_SetError(-EROFS); - rename_allowed = 0; - } else if (yaffs_is_non_empty_dir(newobj)) { - yaffsfs_SetError(-ENOTEMPTY); - rename_allowed = 0; - } else if (olddir->my_dev != newdir->my_dev) { - /* Rename must be on same device */ - yaffsfs_SetError(-EXDEV); - rename_allowed = 0; - } else if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) { - /* - * It is a directory, check that it is not being renamed to - * being its own decendent. - * Do this by tracing from the new directory back to the root, - * checking for obj - */ - - struct yaffs_obj *xx = newdir; - - while (rename_allowed && xx) { - if (xx == obj) - rename_allowed = 0; - xx = xx->parent; - } - if (!rename_allowed) - yaffsfs_SetError(-EINVAL); - } - - if (rename_allowed) - result = yaffs_rename_obj(olddir, oldname, newdir, newname); - - yaffsfs_Unlock(); - - kfree(alt_newpath); - - return (result == YAFFS_FAIL) ? -1 : 0; -} - -static int yaffsfs_DoStat(struct yaffs_obj *obj, struct yaffs_stat *buf) -{ - int retVal = -1; - - obj = yaffs_get_equivalent_obj(obj); - - if (obj && buf) { - buf->st_dev = (int)obj->my_dev->os_context; - buf->st_ino = obj->obj_id; - buf->st_mode = obj->yst_mode & ~S_IFMT; - - if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) - buf->st_mode |= S_IFDIR; - else if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) - buf->st_mode |= S_IFLNK; - else if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) - buf->st_mode |= S_IFREG; - - buf->st_nlink = yaffs_get_obj_link_count(obj); - buf->st_uid = 0; - buf->st_gid = 0; - buf->st_rdev = obj->yst_rdev; - buf->st_size = yaffs_get_obj_length(obj); - buf->st_blksize = obj->my_dev->data_bytes_per_chunk; - buf->st_blocks = lldiv(buf->st_size + buf->st_blksize - 1, - buf->st_blksize); -#if CONFIG_YAFFS_WINCE - buf->yst_wince_atime[0] = obj->win_atime[0]; - buf->yst_wince_atime[1] = obj->win_atime[1]; - buf->yst_wince_ctime[0] = obj->win_ctime[0]; - buf->yst_wince_ctime[1] = obj->win_ctime[1]; - buf->yst_wince_mtime[0] = obj->win_mtime[0]; - buf->yst_wince_mtime[1] = obj->win_mtime[1]; -#else - buf->yst_atime = obj->yst_atime; - buf->yst_ctime = obj->yst_ctime; - buf->yst_mtime = obj->yst_mtime; -#endif - retVal = 0; - } - return retVal; -} - -static int yaffsfs_DoStatOrLStat(const YCHAR *path, - struct yaffs_stat *buf, int doLStat) -{ - struct yaffs_obj *obj = NULL; - struct yaffs_obj *dir = NULL; - int retVal = -1; - int notDir = 0; - int loop = 0; - - if (!path || !buf) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop); - - if (!doLStat && obj) - obj = yaffsfs_FollowLink(obj, 0, &loop); - - if (!dir && notDir) - yaffsfs_SetError(-ENOTDIR); - else if (loop) - yaffsfs_SetError(-ELOOP); - else if (!dir || !obj) - yaffsfs_SetError(-ENOENT); - else - retVal = yaffsfs_DoStat(obj, buf); - - yaffsfs_Unlock(); - - return retVal; - -} - -int yaffs_stat(const YCHAR *path, struct yaffs_stat *buf) -{ - return yaffsfs_DoStatOrLStat(path, buf, 0); -} - -int yaffs_lstat(const YCHAR *path, struct yaffs_stat *buf) -{ - return yaffsfs_DoStatOrLStat(path, buf, 1); -} - -int yaffs_fstat(int fd, struct yaffs_stat *buf) -{ - struct yaffs_obj *obj; - - int retVal = -1; - - if (!buf) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - yaffsfs_Lock(); - obj = yaffsfs_HandleToObject(fd); - - if (obj) - retVal = yaffsfs_DoStat(obj, buf); - else - /* bad handle */ - yaffsfs_SetError(-EBADF); - - yaffsfs_Unlock(); - - return retVal; -} - -static int yaffsfs_DoUtime(struct yaffs_obj *obj, - const struct yaffs_utimbuf *buf) -{ - int retVal = -1; - int result; - - struct yaffs_utimbuf local; - - obj = yaffs_get_equivalent_obj(obj); - - if (obj && obj->my_dev->read_only) { - yaffsfs_SetError(-EROFS); - return -1; - } - - if (!buf) { - local.actime = Y_CURRENT_TIME; - local.modtime = local.actime; - buf = &local; - } - - if (obj) { - obj->yst_atime = buf->actime; - obj->yst_mtime = buf->modtime; - obj->dirty = 1; - result = yaffs_flush_file(obj, 0, 0); - retVal = result == YAFFS_OK ? 0 : -1; - } - - return retVal; -} - -int yaffs_utime(const YCHAR *path, const struct yaffs_utimbuf *buf) -{ - struct yaffs_obj *obj = NULL; - struct yaffs_obj *dir = NULL; - int retVal = -1; - int notDir = 0; - int loop = 0; - - if (!path) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop); - - if (!dir && notDir) - yaffsfs_SetError(-ENOTDIR); - else if (loop) - yaffsfs_SetError(-ELOOP); - else if (!dir || !obj) - yaffsfs_SetError(-ENOENT); - else - retVal = yaffsfs_DoUtime(obj, buf); - - yaffsfs_Unlock(); - - return retVal; - -} - -int yaffs_futime(int fd, const struct yaffs_utimbuf *buf) -{ - struct yaffs_obj *obj; - - int retVal = -1; - - yaffsfs_Lock(); - obj = yaffsfs_HandleToObject(fd); - - if (obj) - retVal = yaffsfs_DoUtime(obj, buf); - else - /* bad handle */ - yaffsfs_SetError(-EBADF); - - yaffsfs_Unlock(); - - return retVal; -} - -#ifndef CONFIG_YAFFS_WINCE -/* xattrib functions */ - -static int yaffs_do_setxattr(const YCHAR *path, const char *name, - const void *data, int size, int flags, int follow) -{ - struct yaffs_obj *obj; - struct yaffs_obj *dir; - int notDir = 0; - int loop = 0; - - int retVal = -1; - - if (!path || !name || !data) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop); - - if (follow) - obj = yaffsfs_FollowLink(obj, 0, &loop); - - if (!dir && notDir) - yaffsfs_SetError(-ENOTDIR); - else if (loop) - yaffsfs_SetError(-ELOOP); - else if (!dir || !obj) - yaffsfs_SetError(-ENOENT); - else { - retVal = yaffs_set_xattrib(obj, name, data, size, flags); - if (retVal < 0) { - yaffsfs_SetError(retVal); - retVal = -1; - } - } - - yaffsfs_Unlock(); - - return retVal; - -} - -int yaffs_setxattr(const YCHAR *path, const char *name, - const void *data, int size, int flags) -{ - return yaffs_do_setxattr(path, name, data, size, flags, 1); -} - -int yaffs_lsetxattr(const YCHAR *path, const char *name, - const void *data, int size, int flags) -{ - return yaffs_do_setxattr(path, name, data, size, flags, 0); -} - -int yaffs_fsetxattr(int fd, const char *name, - const void *data, int size, int flags) -{ - struct yaffs_obj *obj; - - int retVal = -1; - - if (!name || !data) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - yaffsfs_Lock(); - obj = yaffsfs_HandleToObject(fd); - - if (!obj) - yaffsfs_SetError(-EBADF); - else { - retVal = yaffs_set_xattrib(obj, name, data, size, flags); - if (retVal < 0) { - yaffsfs_SetError(retVal); - retVal = -1; - } - } - - yaffsfs_Unlock(); - - return retVal; -} - -static int yaffs_do_getxattr(const YCHAR *path, const char *name, - void *data, int size, int follow) -{ - struct yaffs_obj *obj; - struct yaffs_obj *dir; - int retVal = -1; - int notDir = 0; - int loop = 0; - - if (!path || !name || !data) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop); - - if (follow) - obj = yaffsfs_FollowLink(obj, 0, &loop); - - if (!dir && notDir) - yaffsfs_SetError(-ENOTDIR); - else if (loop) - yaffsfs_SetError(-ELOOP); - else if (!dir || !obj) - yaffsfs_SetError(-ENOENT); - else { - retVal = yaffs_get_xattrib(obj, name, data, size); - if (retVal < 0) { - yaffsfs_SetError(retVal); - retVal = -1; - } - } - yaffsfs_Unlock(); - - return retVal; - -} - -int yaffs_getxattr(const YCHAR *path, const char *name, void *data, int size) -{ - return yaffs_do_getxattr(path, name, data, size, 1); -} - -int yaffs_lgetxattr(const YCHAR *path, const char *name, void *data, int size) -{ - return yaffs_do_getxattr(path, name, data, size, 0); -} - -int yaffs_fgetxattr(int fd, const char *name, void *data, int size) -{ - struct yaffs_obj *obj; - - int retVal = -1; - - if (!name || !data) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - yaffsfs_Lock(); - obj = yaffsfs_HandleToObject(fd); - - if (obj) { - retVal = yaffs_get_xattrib(obj, name, data, size); - if (retVal < 0) { - yaffsfs_SetError(retVal); - retVal = -1; - } - } else - /* bad handle */ - yaffsfs_SetError(-EBADF); - - yaffsfs_Unlock(); - - return retVal; -} - -static int yaffs_do_listxattr(const YCHAR *path, char *data, - int size, int follow) -{ - struct yaffs_obj *obj = NULL; - struct yaffs_obj *dir = NULL; - int retVal = -1; - int notDir = 0; - int loop = 0; - - if (!path || !data) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop); - - if (follow) - obj = yaffsfs_FollowLink(obj, 0, &loop); - - if (!dir && notDir) - yaffsfs_SetError(-ENOTDIR); - else if (loop) - yaffsfs_SetError(-ELOOP); - else if (!dir || !obj) - yaffsfs_SetError(-ENOENT); - else { - retVal = yaffs_list_xattrib(obj, data, size); - if (retVal < 0) { - yaffsfs_SetError(retVal); - retVal = -1; - } - } - - yaffsfs_Unlock(); - - return retVal; - -} - -int yaffs_listxattr(const YCHAR *path, char *data, int size) -{ - return yaffs_do_listxattr(path, data, size, 1); -} - -int yaffs_llistxattr(const YCHAR *path, char *data, int size) -{ - return yaffs_do_listxattr(path, data, size, 0); -} - -int yaffs_flistxattr(int fd, char *data, int size) -{ - struct yaffs_obj *obj; - - int retVal = -1; - - if (!data) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - yaffsfs_Lock(); - obj = yaffsfs_HandleToObject(fd); - - if (obj) { - retVal = yaffs_list_xattrib(obj, data, size); - if (retVal < 0) { - yaffsfs_SetError(retVal); - retVal = -1; - } - } else - /* bad handle */ - yaffsfs_SetError(-EBADF); - - yaffsfs_Unlock(); - - return retVal; -} - -static int yaffs_do_removexattr(const YCHAR *path, const char *name, - int follow) -{ - struct yaffs_obj *obj = NULL; - struct yaffs_obj *dir = NULL; - int notDir = 0; - int loop = 0; - int retVal = -1; - - if (!path || !name) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop); - - if (follow) - obj = yaffsfs_FollowLink(obj, 0, &loop); - - if (!dir && notDir) - yaffsfs_SetError(-ENOTDIR); - else if (loop) - yaffsfs_SetError(-ELOOP); - else if (!dir || !obj) - yaffsfs_SetError(-ENOENT); - else { - retVal = yaffs_remove_xattrib(obj, name); - if (retVal < 0) { - yaffsfs_SetError(retVal); - retVal = -1; - } - } - - yaffsfs_Unlock(); - - return retVal; - -} - -int yaffs_removexattr(const YCHAR *path, const char *name) -{ - return yaffs_do_removexattr(path, name, 1); -} - -int yaffs_lremovexattr(const YCHAR *path, const char *name) -{ - return yaffs_do_removexattr(path, name, 0); -} - -int yaffs_fremovexattr(int fd, const char *name) -{ - struct yaffs_obj *obj; - - int retVal = -1; - - if (!name) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - yaffsfs_Lock(); - obj = yaffsfs_HandleToObject(fd); - - if (obj) { - retVal = yaffs_remove_xattrib(obj, name); - if (retVal < 0) { - yaffsfs_SetError(retVal); - retVal = -1; - } - } else - /* bad handle */ - yaffsfs_SetError(-EBADF); - - yaffsfs_Unlock(); - - return retVal; -} -#endif - -#ifdef CONFIG_YAFFS_WINCE -int yaffs_get_wince_times(int fd, unsigned *wctime, - unsigned *watime, unsigned *wmtime) -{ - struct yaffs_obj *obj; - - int retVal = -1; - - yaffsfs_Lock(); - obj = yaffsfs_HandleToObject(fd); - - if (obj) { - - if (wctime) { - wctime[0] = obj->win_ctime[0]; - wctime[1] = obj->win_ctime[1]; - } - if (watime) { - watime[0] = obj->win_atime[0]; - watime[1] = obj->win_atime[1]; - } - if (wmtime) { - wmtime[0] = obj->win_mtime[0]; - wmtime[1] = obj->win_mtime[1]; - } - - retVal = 0; - } else - /* bad handle */ - yaffsfs_SetError(-EBADF); - - yaffsfs_Unlock(); - - return retVal; -} - -int yaffs_set_wince_times(int fd, - const unsigned *wctime, - const unsigned *watime, const unsigned *wmtime) -{ - struct yaffs_obj *obj; - int result; - int retVal = -1; - - yaffsfs_Lock(); - obj = yaffsfs_HandleToObject(fd); - - if (obj) { - - if (wctime) { - obj->win_ctime[0] = wctime[0]; - obj->win_ctime[1] = wctime[1]; - } - if (watime) { - obj->win_atime[0] = watime[0]; - obj->win_atime[1] = watime[1]; - } - if (wmtime) { - obj->win_mtime[0] = wmtime[0]; - obj->win_mtime[1] = wmtime[1]; - } - - obj->dirty = 1; - result = yaffs_flush_file(obj, 0, 0); - retVal = 0; - } else - /* bad handle */ - yaffsfs_SetError(-EBADF); - - yaffsfs_Unlock(); - - return retVal; -} - -#endif - -static int yaffsfs_DoChMod(struct yaffs_obj *obj, mode_t mode) -{ - int result = -1; - - if (obj) - obj = yaffs_get_equivalent_obj(obj); - - if (obj) { - obj->yst_mode = mode; - obj->dirty = 1; - result = yaffs_flush_file(obj, 0, 0); - } - - return result == YAFFS_OK ? 0 : -1; -} - -int yaffs_access(const YCHAR *path, int amode) -{ - struct yaffs_obj *obj = NULL; - struct yaffs_obj *dir = NULL; - int notDir = 0; - int loop = 0; - int retval = -1; - - if (!path) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - if (amode & ~(R_OK | W_OK | X_OK)) { - yaffsfs_SetError(-EINVAL); - return -1; - } - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop); - obj = yaffsfs_FollowLink(obj, 0, &loop); - - if (!dir && notDir) - yaffsfs_SetError(-ENOTDIR); - else if (loop) - yaffsfs_SetError(-ELOOP); - else if (!dir || !obj) - yaffsfs_SetError(-ENOENT); - else if ((amode & W_OK) && obj->my_dev->read_only) - yaffsfs_SetError(-EROFS); - else { - int access_ok = 1; - - if ((amode & R_OK) && !(obj->yst_mode & S_IREAD)) - access_ok = 0; - if ((amode & W_OK) && !(obj->yst_mode & S_IWRITE)) - access_ok = 0; - if ((amode & X_OK) && !(obj->yst_mode & S_IEXEC)) - access_ok = 0; - - if (!access_ok) - yaffsfs_SetError(-EACCES); - else - retval = 0; - } - - yaffsfs_Unlock(); - - return retval; - -} - -int yaffs_chmod(const YCHAR *path, mode_t mode) -{ - struct yaffs_obj *obj = NULL; - struct yaffs_obj *dir = NULL; - int retVal = -1; - int notDir = 0; - int loop = 0; - - if (!path) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - if (mode & ~(0777)) { - yaffsfs_SetError(-EINVAL); - return -1; - } - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop); - obj = yaffsfs_FollowLink(obj, 0, &loop); - - if (!dir && notDir) - yaffsfs_SetError(-ENOTDIR); - else if (loop) - yaffsfs_SetError(-ELOOP); - else if (!dir || !obj) - yaffsfs_SetError(-ENOENT); - else if (obj->my_dev->read_only) - yaffsfs_SetError(-EROFS); - else - retVal = yaffsfs_DoChMod(obj, mode); - - yaffsfs_Unlock(); - - return retVal; - -} - -int yaffs_fchmod(int fd, mode_t mode) -{ - struct yaffs_obj *obj; - int retVal = -1; - - if (mode & ~(0777)) { - yaffsfs_SetError(-EINVAL); - return -1; - } - - yaffsfs_Lock(); - obj = yaffsfs_HandleToObject(fd); - - if (!obj) - yaffsfs_SetError(-EBADF); - else if (obj->my_dev->read_only) - yaffsfs_SetError(-EROFS); - else - retVal = yaffsfs_DoChMod(obj, mode); - - yaffsfs_Unlock(); - - return retVal; -} - -int yaffs_mkdir(const YCHAR *path, mode_t mode) -{ - struct yaffs_obj *parent = NULL; - struct yaffs_obj *dir = NULL; - YCHAR *name; - YCHAR *alt_path = NULL; - int retVal = -1; - int notDir = 0; - int loop = 0; - - if (!path) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - if (yaffsfs_alt_dir_path(path, &alt_path) < 0) { - yaffsfs_SetError(-ENOMEM); - return -1; - } - if (alt_path) - path = alt_path; - - yaffsfs_Lock(); - parent = yaffsfs_FindDirectory(NULL, path, &name, 0, &notDir, &loop); - if (!parent && notDir) - yaffsfs_SetError(-ENOTDIR); - else if (loop) - yaffsfs_SetError(-ELOOP); - else if (!parent) - yaffsfs_SetError(-ENOENT); - else if (yaffsfs_TooManyObjects(parent->my_dev)) - yaffsfs_SetError(-ENFILE); - else if (yaffs_strnlen(name, 5) == 0) { - /* Trying to make the root itself */ - yaffsfs_SetError(-EEXIST); - } else if (parent->my_dev->read_only) - yaffsfs_SetError(-EROFS); - else { - dir = yaffs_create_dir(parent, name, mode, 0, 0); - if (dir) - retVal = 0; - else if (yaffs_find_by_name(parent, name)) - yaffsfs_SetError(-EEXIST); /* name exists */ - else - yaffsfs_SetError(-ENOSPC); /* assume no space */ - } - - yaffsfs_Unlock(); - - kfree(alt_path); - - return retVal; -} - -int yaffs_rmdir(const YCHAR *path) -{ - int result; - YCHAR *alt_path; - - if (!path) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - if (yaffsfs_alt_dir_path(path, &alt_path) < 0) { - yaffsfs_SetError(-ENOMEM); - return -1; - } - if (alt_path) - path = alt_path; - result = yaffsfs_DoUnlink(path, 1); - - kfree(alt_path); - - return result; -} - -void *yaffs_getdev(const YCHAR *path) -{ - struct yaffs_dev *dev = NULL; - YCHAR *dummy; - dev = yaffsfs_FindDevice(path, &dummy); - return (void *)dev; -} - -int yaffs_mount_common(const YCHAR *path, int read_only, int skip_checkpt) -{ - int retVal = -1; - int result = YAFFS_FAIL; - struct yaffs_dev *dev = NULL; - - if (!path) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - yaffs_trace(YAFFS_TRACE_MOUNT, "yaffs: Mounting %s", path); - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - - yaffsfs_InitHandles(); - - dev = yaffsfs_FindMountPoint(path); - if (dev) { - if (!dev->is_mounted) { - dev->read_only = read_only ? 1 : 0; - if (skip_checkpt) { - u8 skip = dev->param.skip_checkpt_rd; - dev->param.skip_checkpt_rd = 1; - result = yaffs_guts_initialise(dev); - dev->param.skip_checkpt_rd = skip; - } else { - result = yaffs_guts_initialise(dev); - } - - if (result == YAFFS_FAIL) - yaffsfs_SetError(-ENOMEM); - retVal = result ? 0 : -1; - - } else - yaffsfs_SetError(-EBUSY); - } else - yaffsfs_SetError(-ENODEV); - - yaffsfs_Unlock(); - return retVal; - -} - -int yaffs_mount2(const YCHAR *path, int readonly) -{ - return yaffs_mount_common(path, readonly, 0); -} - -int yaffs_mount(const YCHAR *path) -{ - return yaffs_mount_common(path, 0, 0); -} - -int yaffs_sync(const YCHAR *path) -{ - int retVal = -1; - struct yaffs_dev *dev = NULL; - YCHAR *dummy; - - if (!path) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - dev = yaffsfs_FindDevice(path, &dummy); - if (dev) { - if (!dev->is_mounted) - yaffsfs_SetError(-EINVAL); - else if (dev->read_only) - yaffsfs_SetError(-EROFS); - else { - - yaffs_flush_whole_cache(dev); - yaffs_checkpoint_save(dev); - retVal = 0; - - } - } else - yaffsfs_SetError(-ENODEV); - - yaffsfs_Unlock(); - return retVal; -} - -static int yaffsfs_IsDevBusy(struct yaffs_dev *dev) -{ - int i; - struct yaffs_obj *obj; - - for (i = 0; i < YAFFSFS_N_HANDLES; i++) { - obj = yaffsfs_HandleToObject(i); - if (obj && obj->my_dev == dev) - return 1; - } - return 0; -} - -int yaffs_remount(const YCHAR *path, int force, int read_only) -{ - int retVal = -1; - struct yaffs_dev *dev = NULL; - - if (!path) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - dev = yaffsfs_FindMountPoint(path); - if (dev) { - if (dev->is_mounted) { - yaffs_flush_whole_cache(dev); - - if (force || !yaffsfs_IsDevBusy(dev)) { - if (read_only) - yaffs_checkpoint_save(dev); - dev->read_only = read_only ? 1 : 0; - retVal = 0; - } else - yaffsfs_SetError(-EBUSY); - - } else - yaffsfs_SetError(-EINVAL); - - } else - yaffsfs_SetError(-ENODEV); - - yaffsfs_Unlock(); - return retVal; - -} - -int yaffs_unmount2(const YCHAR *path, int force) -{ - int retVal = -1; - struct yaffs_dev *dev = NULL; - - if (!path) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - dev = yaffsfs_FindMountPoint(path); - if (dev) { - if (dev->is_mounted) { - int inUse; - yaffs_flush_whole_cache(dev); - yaffs_checkpoint_save(dev); - inUse = yaffsfs_IsDevBusy(dev); - if (!inUse || force) { - if (inUse) - yaffsfs_BreakDeviceHandles(dev); - yaffs_deinitialise(dev); - - retVal = 0; - } else - yaffsfs_SetError(-EBUSY); - - } else - yaffsfs_SetError(-EINVAL); - - } else - yaffsfs_SetError(-ENODEV); - - yaffsfs_Unlock(); - return retVal; - -} - -int yaffs_unmount(const YCHAR *path) -{ - return yaffs_unmount2(path, 0); -} - -loff_t yaffs_freespace(const YCHAR *path) -{ - loff_t retVal = -1; - struct yaffs_dev *dev = NULL; - YCHAR *dummy; - - if (!path) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - dev = yaffsfs_FindDevice(path, &dummy); - if (dev && dev->is_mounted) { - retVal = yaffs_get_n_free_chunks(dev); - retVal *= dev->data_bytes_per_chunk; - - } else - yaffsfs_SetError(-EINVAL); - - yaffsfs_Unlock(); - return retVal; -} - -loff_t yaffs_totalspace(const YCHAR *path) -{ - loff_t retVal = -1; - struct yaffs_dev *dev = NULL; - YCHAR *dummy; - - if (!path) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - dev = yaffsfs_FindDevice(path, &dummy); - if (dev && dev->is_mounted) { - retVal = (dev->param.end_block - dev->param.start_block + 1) - - dev->param.n_reserved_blocks; - retVal *= dev->param.chunks_per_block; - retVal *= dev->data_bytes_per_chunk; - - } else - yaffsfs_SetError(-EINVAL); - - yaffsfs_Unlock(); - return retVal; -} - -int yaffs_inodecount(const YCHAR *path) -{ - loff_t retVal = -1; - struct yaffs_dev *dev = NULL; - YCHAR *dummy; - - if (!path) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - dev = yaffsfs_FindDevice(path, &dummy); - if (dev && dev->is_mounted) { - int n_obj = dev->n_obj; - if (n_obj > dev->n_hardlinks) - retVal = n_obj - dev->n_hardlinks; - } - - if (retVal < 0) - yaffsfs_SetError(-EINVAL); - - yaffsfs_Unlock(); - return retVal; -} - -void yaffs_add_device(struct yaffs_dev *dev) -{ - struct list_head *cfg; - /* First check that the device is not in the list. */ - - list_for_each(cfg, &yaffsfs_deviceList) { - if (dev == list_entry(cfg, struct yaffs_dev, dev_list)) - return; - } - - dev->is_mounted = 0; - dev->param.remove_obj_fn = yaffsfs_RemoveObjectCallback; - - if (!dev->dev_list.next) - INIT_LIST_HEAD(&dev->dev_list); - - list_add(&dev->dev_list, &yaffsfs_deviceList); -} - -void yaffs_remove_device(struct yaffs_dev *dev) -{ - list_del_init(&dev->dev_list); -} - -/* Functions to iterate through devices. NB Use with extreme care! */ - -static struct list_head *dev_iterator; -void yaffs_dev_rewind(void) -{ - dev_iterator = yaffsfs_deviceList.next; -} - -struct yaffs_dev *yaffs_next_dev(void) -{ - struct yaffs_dev *retval; - - if (!dev_iterator) - return NULL; - if (dev_iterator == &yaffsfs_deviceList) - return NULL; - - retval = list_entry(dev_iterator, struct yaffs_dev, dev_list); - dev_iterator = dev_iterator->next; - return retval; -} - -/* Directory search stuff. */ - -static struct list_head search_contexts; - -static void yaffsfs_SetDirRewound(struct yaffsfs_DirSearchContxt *dsc) -{ - if (dsc && - dsc->dirObj && - dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) { - - dsc->offset = 0; - - if (list_empty(&dsc->dirObj->variant.dir_variant.children)) - dsc->nextReturn = NULL; - else - dsc->nextReturn = - list_entry(dsc->dirObj->variant.dir_variant. - children.next, struct yaffs_obj, - siblings); - } else { - /* Hey someone isn't playing nice! */ - } -} - -static void yaffsfs_DirAdvance(struct yaffsfs_DirSearchContxt *dsc) -{ - if (dsc && - dsc->dirObj && - dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) { - - if (dsc->nextReturn == NULL || - list_empty(&dsc->dirObj->variant.dir_variant.children)) - dsc->nextReturn = NULL; - else { - struct list_head *next = dsc->nextReturn->siblings.next; - - if (next == &dsc->dirObj->variant.dir_variant.children) - dsc->nextReturn = NULL; /* end of list */ - else - dsc->nextReturn = list_entry(next, - struct yaffs_obj, - siblings); - } - } else { - /* Hey someone isn't playing nice! */ - } -} - -static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj) -{ - - struct list_head *i; - struct yaffsfs_DirSearchContxt *dsc; - - /* if search contexts not initilised then skip */ - if (!search_contexts.next) - return; - - /* Iterate through the directory search contexts. - * If any are the one being removed, then advance the dsc to - * the next one to prevent a hanging ptr. - */ - list_for_each(i, &search_contexts) { - dsc = list_entry(i, struct yaffsfs_DirSearchContxt, others); - if (dsc->nextReturn == obj) - yaffsfs_DirAdvance(dsc); - } - -} - -yaffs_DIR *yaffs_opendir(const YCHAR *dirname) -{ - yaffs_DIR *dir = NULL; - struct yaffs_obj *obj = NULL; - struct yaffsfs_DirSearchContxt *dsc = NULL; - int notDir = 0; - int loop = 0; - - if (!dirname) { - yaffsfs_SetError(-EFAULT); - return NULL; - } - - if (yaffsfs_CheckPath(dirname) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return NULL; - } - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL, dirname, 0, 1, NULL, &notDir, &loop); - - if (!obj && notDir) - yaffsfs_SetError(-ENOTDIR); - else if (loop) - yaffsfs_SetError(-ELOOP); - else if (!obj) - yaffsfs_SetError(-ENOENT); - else if (obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) - yaffsfs_SetError(-ENOTDIR); - else { - int i; - - for (i = 0, dsc = NULL; i < YAFFSFS_N_DSC && !dsc; i++) { - if (!yaffsfs_dsc[i].inUse) - dsc = &yaffsfs_dsc[i]; - } - - dir = (yaffs_DIR *) dsc; - - if (dsc) { - memset(dsc, 0, sizeof(struct yaffsfs_DirSearchContxt)); - dsc->inUse = 1; - dsc->dirObj = obj; - yaffs_strncpy(dsc->name, dirname, NAME_MAX); - INIT_LIST_HEAD(&dsc->others); - - if (!search_contexts.next) - INIT_LIST_HEAD(&search_contexts); - - list_add(&dsc->others, &search_contexts); - yaffsfs_SetDirRewound(dsc); - } - - } - - yaffsfs_Unlock(); - - return dir; -} - -struct yaffs_dirent *yaffs_readdir(yaffs_DIR * dirp) -{ - struct yaffsfs_DirSearchContxt *dsc; - struct yaffs_dirent *retVal = NULL; - - dsc = (struct yaffsfs_DirSearchContxt *) dirp; - yaffsfs_Lock(); - - if (dsc && dsc->inUse) { - yaffsfs_SetError(0); - if (dsc->nextReturn) { - dsc->de.d_ino = - yaffs_get_equivalent_obj(dsc->nextReturn)->obj_id; - dsc->de.d_dont_use = (unsigned)dsc->nextReturn; - dsc->de.d_off = dsc->offset++; - yaffs_get_obj_name(dsc->nextReturn, - dsc->de.d_name, NAME_MAX); - if (yaffs_strnlen(dsc->de.d_name, NAME_MAX + 1) == 0) { - /* this should not happen! */ - yaffs_strcpy(dsc->de.d_name, _Y("zz")); - } - dsc->de.d_reclen = sizeof(struct yaffs_dirent); - retVal = &dsc->de; - yaffsfs_DirAdvance(dsc); - } else - retVal = NULL; - } else - yaffsfs_SetError(-EBADF); - - yaffsfs_Unlock(); - - return retVal; - -} - -void yaffs_rewinddir(yaffs_DIR *dirp) -{ - struct yaffsfs_DirSearchContxt *dsc; - - dsc = (struct yaffsfs_DirSearchContxt *) dirp; - - yaffsfs_Lock(); - - yaffsfs_SetDirRewound(dsc); - - yaffsfs_Unlock(); -} - -int yaffs_closedir(yaffs_DIR *dirp) -{ - struct yaffsfs_DirSearchContxt *dsc; - - dsc = (struct yaffsfs_DirSearchContxt *) dirp; - - if (!dsc) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - yaffsfs_Lock(); - dsc->inUse = 0; - list_del(&dsc->others); /* unhook from list */ - yaffsfs_Unlock(); - return 0; -} - -/* End of directory stuff */ - -int yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath) -{ - struct yaffs_obj *parent = NULL; - struct yaffs_obj *obj; - YCHAR *name; - int retVal = -1; - int mode = 0; /* ignore for now */ - int notDir = 0; - int loop = 0; - - if (!oldpath || !newpath) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(newpath) < 0 || yaffsfs_CheckPath(oldpath) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - parent = yaffsfs_FindDirectory(NULL, newpath, &name, 0, &notDir, &loop); - if (!parent && notDir) - yaffsfs_SetError(-ENOTDIR); - else if (loop) - yaffsfs_SetError(-ELOOP); - else if (!parent || yaffs_strnlen(name, 5) < 1) - yaffsfs_SetError(-ENOENT); - else if (yaffsfs_TooManyObjects(parent->my_dev)) - yaffsfs_SetError(-ENFILE); - else if (parent->my_dev->read_only) - yaffsfs_SetError(-EROFS); - else { - obj = yaffs_create_symlink(parent, name, mode, 0, 0, oldpath); - if (obj) - retVal = 0; - else if (yaffsfs_FindObject - (NULL, newpath, 0, 0, NULL, NULL, NULL)) - yaffsfs_SetError(-EEXIST); - else - yaffsfs_SetError(-ENOSPC); - } - - yaffsfs_Unlock(); - - return retVal; - -} - -int yaffs_readlink(const YCHAR *path, YCHAR *buf, int bufsiz) -{ - struct yaffs_obj *obj = NULL; - struct yaffs_obj *dir = NULL; - int retVal = -1; - int notDir = 0; - int loop = 0; - - if (!path || !buf) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, &notDir, &loop); - - if (!dir && notDir) - yaffsfs_SetError(-ENOTDIR); - else if (loop) - yaffsfs_SetError(-ELOOP); - else if (!dir || !obj) - yaffsfs_SetError(-ENOENT); - else if (obj->variant_type != YAFFS_OBJECT_TYPE_SYMLINK) - yaffsfs_SetError(-EINVAL); - else { - YCHAR *alias = obj->variant.symlink_variant.alias; - memset(buf, 0, bufsiz); - yaffs_strncpy(buf, alias, bufsiz - 1); - retVal = 0; - } - yaffsfs_Unlock(); - return retVal; -} - -int yaffs_link(const YCHAR *oldpath, const YCHAR *linkpath) -{ - /* Creates a link called newpath to existing oldpath */ - struct yaffs_obj *obj = NULL; - struct yaffs_obj *lnk = NULL; - struct yaffs_obj *obj_dir = NULL; - struct yaffs_obj *lnk_dir = NULL; - int retVal = -1; - int notDirObj = 0; - int notDirLnk = 0; - int objLoop = 0; - int lnkLoop = 0; - YCHAR *newname; - - if (!oldpath || !linkpath) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(linkpath) < 0 || yaffsfs_CheckPath(oldpath) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL, oldpath, 0, 1, - &obj_dir, &notDirObj, &objLoop); - lnk = yaffsfs_FindObject(NULL, linkpath, 0, 0, NULL, NULL, NULL); - lnk_dir = yaffsfs_FindDirectory(NULL, linkpath, &newname, - 0, &notDirLnk, &lnkLoop); - - if ((!obj_dir && notDirObj) || (!lnk_dir && notDirLnk)) - yaffsfs_SetError(-ENOTDIR); - else if (objLoop || lnkLoop) - yaffsfs_SetError(-ELOOP); - else if (!obj_dir || !lnk_dir || !obj) - yaffsfs_SetError(-ENOENT); - else if (obj->my_dev->read_only) - yaffsfs_SetError(-EROFS); - else if (yaffsfs_TooManyObjects(obj->my_dev)) - yaffsfs_SetError(-ENFILE); - else if (lnk) - yaffsfs_SetError(-EEXIST); - else if (lnk_dir->my_dev != obj->my_dev) - yaffsfs_SetError(-EXDEV); - else { - retVal = yaffsfs_CheckNameLength(newname); - - if (retVal == 0) { - lnk = yaffs_link_obj(lnk_dir, newname, obj); - if (lnk) - retVal = 0; - else { - yaffsfs_SetError(-ENOSPC); - retVal = -1; - } - } - } - yaffsfs_Unlock(); - - return retVal; -} - -int yaffs_mknod(const YCHAR *pathname, mode_t mode, dev_t dev) -{ - yaffsfs_SetError(-EINVAL); - return -1; -} - -/* - * D E B U G F U N C T I O N S - */ - -/* - * yaffs_n_handles() - * Returns number of handles attached to the object - */ -int yaffs_n_handles(const YCHAR *path) -{ - struct yaffs_obj *obj; - - if (!path) { - yaffsfs_SetError(-EFAULT); - return -1; - } - - if (yaffsfs_CheckPath(path) < 0) { - yaffsfs_SetError(-ENAMETOOLONG); - return -1; - } - - obj = yaffsfs_FindObject(NULL, path, 0, 1, NULL, NULL, NULL); - - if (obj) - return yaffsfs_CountHandles(obj); - else - return -1; -} - -int yaffs_get_error(void) -{ - return yaffsfs_GetLastError(); -} - -int yaffs_set_error(int error) -{ - yaffsfs_SetError(error); - return 0; -} - -int yaffs_dump_dev(const YCHAR *path) -{ -#if 0 - YCHAR *rest; - - struct yaffs_obj *obj = yaffsfs_FindRoot(path, &rest); - - if (obj) { - struct yaffs_dev *dev = obj->my_dev; - - printf("\n" - "n_page_writes.......... %d\n" - "n_page_reads........... %d\n" - "n_erasures....... %d\n" - "n_gc_copies............ %d\n" - "garbageCollections... %d\n" - "passiveGarbageColl'ns %d\n" - "\n", - dev->n_page_writes, - dev->n_page_reads, - dev->n_erasures, - dev->n_gc_copies, - dev->garbageCollections, dev->passiveGarbageCollections); - - } -#endif - return 0; -} diff --git a/fs/yaffs2/yaffsfs.h b/fs/yaffs2/yaffsfs.h deleted file mode 100644 index e14f41c63ee..00000000000 --- a/fs/yaffs2/yaffsfs.h +++ /dev/null @@ -1,199 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* - * Header file for using yaffs in an application via - * a direct interface. - */ - -#ifndef __YAFFSFS_H__ -#define __YAFFSFS_H__ - -#include "yaffscfg.h" -#include "yportenv.h" - -#ifndef NAME_MAX -#define NAME_MAX 256 -#endif - -#define YAFFS_MAX_FILE_SIZE (0x800000000LL - 1) - -struct yaffs_dirent { - long d_ino; /* inode number */ - off_t d_off; /* offset to this dirent */ - unsigned short d_reclen; /* length of this dirent */ - YUCHAR d_type; /* type of this record */ - YCHAR d_name[NAME_MAX+1]; /* file name (null-terminated) */ - unsigned d_dont_use; /* debug: not for public consumption */ -}; - -typedef struct opaque_structure yaffs_DIR; - -struct yaffs_stat { - int st_dev; /* device */ - int st_ino; /* inode */ - unsigned st_mode; /* protection */ - int st_nlink; /* number of hard links */ - int st_uid; /* user ID of owner */ - int st_gid; /* group ID of owner */ - unsigned st_rdev; /* device type (if inode device) */ - loff_t st_size; /* total size, in bytes */ - unsigned long st_blksize; /* blocksize for filesystem I/O */ - unsigned long st_blocks; /* number of blocks allocated */ -#ifdef CONFIG_YAFFS_WINCE - /* Special 64-bit times for WinCE */ - unsigned long yst_wince_atime[2]; - unsigned long yst_wince_mtime[2]; - unsigned long yst_wince_ctime[2]; -#else - unsigned long yst_atime; /* time of last access */ - unsigned long yst_mtime; /* time of last modification */ - unsigned long yst_ctime; /* time of last change */ -#endif -}; - -struct yaffs_utimbuf { - unsigned long actime; - unsigned long modtime; -}; - -int yaffs_open(const YCHAR *path, int oflag, int mode) ; - -int yaffs_close(int fd) ; -int yaffs_fsync(int fd) ; -int yaffs_fdatasync(int fd) ; -int yaffs_flush(int fd) ; /* same as yaffs_fsync() */ - -int yaffs_access(const YCHAR *path, int amode); - -int yaffs_dup(int fd); - -int yaffs_read(int fd, void *buf, unsigned int nbyte) ; -int yaffs_write(int fd, const void *buf, unsigned int nbyte) ; - -int yaffs_pread(int fd, void *buf, unsigned int nbyte, loff_t offset); -int yaffs_pwrite(int fd, const void *buf, unsigned int nbyte, loff_t offset); - -loff_t yaffs_lseek(int fd, loff_t offset, int whence) ; - -int yaffs_truncate(const YCHAR *path, loff_t new_size); -int yaffs_ftruncate(int fd, loff_t new_size); - -int yaffs_unlink(const YCHAR *path) ; -int yaffs_rename(const YCHAR *oldPath, const YCHAR *newPath) ; - -int yaffs_stat(const YCHAR *path, struct yaffs_stat *buf) ; -int yaffs_lstat(const YCHAR *path, struct yaffs_stat *buf) ; -int yaffs_fstat(int fd, struct yaffs_stat *buf) ; - -int yaffs_utime(const YCHAR *path, const struct yaffs_utimbuf *buf); -int yaffs_futime(int fd, const struct yaffs_utimbuf *buf); - -int yaffs_setxattr(const char *path, const char *name, - const void *data, int size, int flags); -int yaffs_lsetxattr(const char *path, const char *name, - const void *data, int size, int flags); -int yaffs_fsetxattr(int fd, const char *name, - const void *data, int size, int flags); - -int yaffs_getxattr(const char *path, const char *name, - void *data, int size); -int yaffs_lgetxattr(const char *path, const char *name, - void *data, int size); -int yaffs_fgetxattr(int fd, const char *name, - void *data, int size); - -int yaffs_removexattr(const char *path, const char *name); -int yaffs_lremovexattr(const char *path, const char *name); -int yaffs_fremovexattr(int fd, const char *name); - -int yaffs_listxattr(const char *path, char *list, int size); -int yaffs_llistxattr(const char *path, char *list, int size); -int yaffs_flistxattr(int fd, char *list, int size); - -#ifdef CONFIG_YAFFS_WINCE - -int yaffs_set_wince_times(int fd, - const unsigned *wctime, - const unsigned *watime, - const unsigned *wmtime); -int yaffs_get_wince_times(int fd, - unsigned *wctime, - unsigned *watime, - unsigned *wmtime); - -#endif - -int yaffs_chmod(const YCHAR *path, mode_t mode); -int yaffs_fchmod(int fd, mode_t mode); - -int yaffs_mkdir(const YCHAR *path, mode_t mode) ; -int yaffs_rmdir(const YCHAR *path) ; - -yaffs_DIR *yaffs_opendir(const YCHAR *dirname) ; -struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp) ; -void yaffs_rewinddir(yaffs_DIR *dirp) ; -int yaffs_closedir(yaffs_DIR *dirp) ; - -int yaffs_mount(const YCHAR *path) ; -int yaffs_mount2(const YCHAR *path, int read_only); -int yaffs_mount_common(const YCHAR *path, int read_only, int skip_checkpt); - -int yaffs_unmount(const YCHAR *path) ; -int yaffs_unmount2(const YCHAR *path, int force); -int yaffs_remount(const YCHAR *path, int force, int read_only); - -int yaffs_sync(const YCHAR *path) ; - -int yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath); -int yaffs_readlink(const YCHAR *path, YCHAR *buf, int bufsiz); - -int yaffs_link(const YCHAR *oldpath, const YCHAR *newpath); -int yaffs_mknod(const YCHAR *pathname, mode_t mode, dev_t dev); - -loff_t yaffs_freespace(const YCHAR *path); -loff_t yaffs_totalspace(const YCHAR *path); - -int yaffs_inodecount(const YCHAR *path); - -int yaffs_n_handles(const YCHAR *path); - -#define YAFFS_SHARE_READ 1 -#define YAFFS_SHARE_WRITE 2 -int yaffs_open_sharing(const YCHAR *path, int oflag, int mode, int shareMode); - -struct yaffs_dev; -void yaffs_add_device(struct yaffs_dev *dev); - -int yaffs_start_up(void); -int yaffsfs_GetLastError(void); - -/* Functions to iterate through devices. NB Use with extreme care! */ -void yaffs_dev_rewind(void); -struct yaffs_dev *yaffs_next_dev(void); - -/* Function to get the last error */ -int yaffs_get_error(void); -const char *yaffs_error_to_str(int err); - -/* Function only for debugging */ -void *yaffs_getdev(const YCHAR *path); -int yaffs_dump_dev(const YCHAR *path); -int yaffs_set_error(int error); - -/* Trace control functions */ -unsigned yaffs_set_trace(unsigned tm); -unsigned yaffs_get_trace(void); -#endif diff --git a/fs/yaffs2/ydirectenv.h b/fs/yaffs2/ydirectenv.h deleted file mode 100644 index 14b13ce2bd4..00000000000 --- a/fs/yaffs2/ydirectenv.h +++ /dev/null @@ -1,77 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* - * ydirectenv.h: Environment wrappers for YAFFS direct. - */ - -#ifndef __YDIRECTENV_H__ -#define __YDIRECTENV_H__ - -#include <malloc.h> -#include <linux/compat.h> - -#include "yaffs_osglue.h" - -void yaffs_bug_fn(const char *file_name, int line_no); - -#define YCHAR char -#define YUCHAR unsigned char -#define _Y(x) x - -#define yaffs_strcat(a, b) strcat(a, b) -#define yaffs_strcpy(a, b) strcpy(a, b) -#define yaffs_strncpy(a, b, c) strncpy(a, b, c) -#define yaffs_strnlen(s, m) strnlen(s, m) -#ifdef CONFIG_YAFFS_CASE_INSENSITIVE -#define yaffs_strcmp(a, b) strcasecmp(a, b) -#define yaffs_strncmp(a, b, c) strncasecmp(a, b, c) -#else -#define yaffs_strcmp(a, b) strcmp(a, b) -#define yaffs_strncmp(a, b, c) strncmp(a, b, c) -#endif - -void yaffs_qsort(void *aa, size_t n, size_t es, - int (*cmp)(const void *, const void *)); - -#define sort(base, n, sz, cmp_fn, swp) yaffs_qsort(base, n, sz, cmp_fn) - -#define YAFFS_PATH_DIVIDERS "/" - -#ifdef NO_inline -#define inline -#endif - -#define yaffs_trace(msk, fmt, ...) do { \ - if (yaffs_trace_mask & (msk)) \ - printf("yaffs: " fmt "\n", ##__VA_ARGS__); \ -} while (0) - -#define YAFFS_LOSTNFOUND_NAME "lost+found" -#define YAFFS_LOSTNFOUND_PREFIX "obj" - -#include "yaffscfg.h" - -#define Y_CURRENT_TIME yaffsfs_CurrentTime() -#define Y_TIME_CONVERT(x) x - -#define YAFFS_ROOT_MODE 0666 -#define YAFFS_LOSTNFOUND_MODE 0666 - -#include <linux/list.h> - -#include "yaffsfs.h" - -#endif diff --git a/fs/yaffs2/yportenv.h b/fs/yaffs2/yportenv.h deleted file mode 100644 index b23042948db..00000000000 --- a/fs/yaffs2/yportenv.h +++ /dev/null @@ -1,301 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2011 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles(a)aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YPORTENV_H__ -#define __YPORTENV_H__ - -#include <linux/bug.h> -#include <linux/types.h> - -/* Definition of types */ -#ifdef CONFIG_YAFFS_DEFINES_TYPES -typedef unsigned char u8; -typedef unsigned short u16; -typedef unsigned u32; -#endif - -#ifdef CONFIG_YAFFS_PROVIDE_DEFS -/* File types */ - -#define DT_UNKNOWN 0 -#define DT_FIFO 1 -#define DT_CHR 2 -#define DT_DIR 4 -#define DT_BLK 6 -#define DT_REG 8 -#define DT_LNK 10 -#define DT_SOCK 12 -#define DT_WHT 14 - -/* - * Attribute flags. - * These are or-ed together to select what has been changed. - */ -#define ATTR_MODE 1 -#define ATTR_UID 2 -#define ATTR_GID 4 -#define ATTR_SIZE 8 -#define ATTR_ATIME 16 -#define ATTR_MTIME 32 -#define ATTR_CTIME 64 - -struct iattr { - unsigned int ia_valid; - unsigned ia_mode; - unsigned ia_uid; - unsigned ia_gid; - unsigned ia_size; - unsigned ia_atime; - unsigned ia_mtime; - unsigned ia_ctime; - unsigned int ia_attr_flags; -}; - -#endif - -#if defined CONFIG_YAFFS_WINCE - -#include "ywinceenv.h" - -#elif defined CONFIG_YAFFS_DIRECT - -/* Direct interface */ -#include "ydirectenv.h" - -#elif defined CONFIG_YAFFS_UTIL - -#include "yutilsenv.h" - -#else -/* Should have specified a configuration type */ -#error Unknown configuration - -#endif - -#if defined(CONFIG_YAFFS_DIRECT) || defined(CONFIG_YAFFS_WINCE) - -#ifdef CONFIG_YAFFSFS_PROVIDE_VALUES - -#ifndef O_RDONLY -#define O_RDONLY 00 -#endif - -#ifndef O_WRONLY -#define O_WRONLY 01 -#endif - -#ifndef O_RDWR -#define O_RDWR 02 -#endif - -#ifndef O_CREAT -#define O_CREAT 0100 -#endif - -#ifndef O_EXCL -#define O_EXCL 0200 -#endif - -#ifndef O_TRUNC -#define O_TRUNC 01000 -#endif - -#ifndef O_APPEND -#define O_APPEND 02000 -#endif - -#ifndef SEEK_SET -#define SEEK_SET 0 -#endif - -#ifndef SEEK_CUR -#define SEEK_CUR 1 -#endif - -#ifndef SEEK_END -#define SEEK_END 2 -#endif - -#ifndef EBUSY -#define EBUSY 16 -#endif - -#ifndef ENODEV -#define ENODEV 19 -#endif - -#ifndef EINVAL -#define EINVAL 22 -#endif - -#ifndef ENFILE -#define ENFILE 23 -#endif - -#ifndef EBADF -#define EBADF 9 -#endif - -#ifndef EACCES -#define EACCES 13 -#endif - -#ifndef EXDEV -#define EXDEV 18 -#endif - -#ifndef ENOENT -#define ENOENT 2 -#endif - -#ifndef ENOSPC -#define ENOSPC 28 -#endif - -#ifndef EROFS -#define EROFS 30 -#endif - -#ifndef ERANGE -#define ERANGE 34 -#endif - -#ifndef ENODATA -#define ENODATA 61 -#endif - -#ifndef ENOTEMPTY -#define ENOTEMPTY 39 -#endif - -#ifndef ENAMETOOLONG -#define ENAMETOOLONG 36 -#endif - -#ifndef ENOMEM -#define ENOMEM 12 -#endif - -#ifndef EFAULT -#define EFAULT 14 -#endif - -#ifndef EEXIST -#define EEXIST 17 -#endif - -#ifndef ENOTDIR -#define ENOTDIR 20 -#endif - -#ifndef EISDIR -#define EISDIR 21 -#endif - -#ifndef ELOOP -#define ELOOP 40 -#endif - -/* Mode flags */ - -#ifndef S_IFMT -#define S_IFMT 0170000 -#endif - -#ifndef S_IFSOCK -#define S_IFSOCK 0140000 -#endif - -#ifndef S_IFIFO -#define S_IFIFO 0010000 -#endif - -#ifndef S_IFCHR -#define S_IFCHR 0020000 -#endif - -#ifndef S_IFBLK -#define S_IFBLK 0060000 -#endif - -#ifndef S_IFLNK -#define S_IFLNK 0120000 -#endif - -#ifndef S_IFDIR -#define S_IFDIR 0040000 -#endif - -#ifndef S_IFREG -#define S_IFREG 0100000 -#endif - -#define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK) -#define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) -#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) -#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) -#define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK) -#define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR) -#define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO) - -#ifndef S_IREAD -#define S_IREAD 0000400 -#endif - -#ifndef S_IWRITE -#define S_IWRITE 0000200 -#endif - -#ifndef S_IEXEC -#define S_IEXEC 0000100 -#endif - -#ifndef XATTR_CREATE -#define XATTR_CREATE 1 -#endif - -#ifndef XATTR_REPLACE -#define XATTR_REPLACE 2 -#endif - -#ifndef R_OK -#define R_OK 4 -#define W_OK 2 -#define X_OK 1 -#define F_OK 0 -#endif - -#else -#include <errno.h> -#include <sys/stat.h> -#include <fcntl.h> -#endif - -#endif - -#ifndef Y_DUMP_STACK -#define Y_DUMP_STACK() do { } while (0) -#endif - -#ifndef BUG -#define BUG() do {\ - yaffs_trace(YAFFS_TRACE_BUG,\ - "==>> yaffs bug: " __FILE__ " %d",\ - __LINE__);\ - Y_DUMP_STACK();\ -} while (0) -#endif - -#endif -- 2.47.1

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[PATCH 1/1] efi_loader: reduce UEFI size if HAS_BOARD_SIZE_LIMIT=y
by Heinrich Schuchardt 20 Jan '25

20 Jan '25

If a board has a strict size limit, disable * Unicode capitalization and * HII protocols by default to reduce the image size. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt(a)canonical.com> --- lib/efi_loader/Kconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig index c46ffe3a9d8..59df4e19cb6 100644 --- a/lib/efi_loader/Kconfig +++ b/lib/efi_loader/Kconfig @@ -386,7 +386,7 @@ config EFI_DT_FIXUP config EFI_LOADER_HII bool "HII protocols" - default y + default y if !HAS_BOARD_SIZE_LIMIT help The Human Interface Infrastructure is a complicated framework that allows UEFI applications to draw fancy menus and hook strings using @@ -406,7 +406,7 @@ if EFI_UNICODE_COLLATION_PROTOCOL2 config EFI_UNICODE_CAPITALIZATION bool "Support Unicode capitalization" - default y + default y if !HAS_BOARD_SIZE_LIMIT help Select this option to enable correct handling of the capitalization of Unicode codepoints in the range 0x0000-0xffff. If this option is not -- 2.47.1

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