Upstream development stopped 2012. Linux eliminated YAFFS2 in 2010.

Signed-off-by: Heinrich Schuchardt heinrich.schuchardt@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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@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