From: Stuart Longland stuartl@vrt.com.au
This is an enhancement that permits storing the environment file on an EXT4 partition such as the root filesystem. It is based on the existing FAT environment file code. --- common/Makefile | 2 + common/cmd_nvedit.c | 3 +- common/env_ext4.c | 127 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 131 insertions(+), 1 deletion(-) create mode 100644 common/env_ext4.c
diff --git a/common/Makefile b/common/Makefile index e1ae149..7a45fa8 100644 --- a/common/Makefile +++ b/common/Makefile @@ -57,6 +57,7 @@ obj-$(CONFIG_ENV_IS_IN_NVRAM) += env_embedded.o obj-$(CONFIG_ENV_IS_IN_FLASH) += env_flash.o obj-$(CONFIG_ENV_IS_IN_MMC) += env_mmc.o obj-$(CONFIG_ENV_IS_IN_FAT) += env_fat.o +obj-$(CONFIG_ENV_IS_IN_EXT4) += env_ext4.o obj-$(CONFIG_ENV_IS_IN_NAND) += env_nand.o obj-$(CONFIG_ENV_IS_IN_NVRAM) += env_nvram.o obj-$(CONFIG_ENV_IS_IN_ONENAND) += env_onenand.o @@ -236,6 +237,7 @@ obj-$(CONFIG_SPL_ENV_SUPPORT) += env_callback.o obj-$(CONFIG_ENV_IS_NOWHERE) += env_nowhere.o obj-$(CONFIG_ENV_IS_IN_MMC) += env_mmc.o obj-$(CONFIG_ENV_IS_IN_FAT) += env_fat.o +obj-$(CONFIG_ENV_IS_IN_EXT4) += env_ext4.o obj-$(CONFIG_ENV_IS_IN_NAND) += env_nand.o obj-$(CONFIG_ENV_IS_IN_SPI_FLASH) += env_sf.o obj-$(CONFIG_ENV_IS_IN_FLASH) += env_flash.o diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c index 855808c..242a1a4 100644 --- a/common/cmd_nvedit.c +++ b/common/cmd_nvedit.c @@ -43,6 +43,7 @@ DECLARE_GLOBAL_DATA_PTR; !defined(CONFIG_ENV_IS_IN_DATAFLASH) && \ !defined(CONFIG_ENV_IS_IN_MMC) && \ !defined(CONFIG_ENV_IS_IN_FAT) && \ + !defined(CONFIG_ENV_IS_IN_EXT4) && \ !defined(CONFIG_ENV_IS_IN_NAND) && \ !defined(CONFIG_ENV_IS_IN_NVRAM) && \ !defined(CONFIG_ENV_IS_IN_ONENAND) && \ @@ -51,7 +52,7 @@ DECLARE_GLOBAL_DATA_PTR; !defined(CONFIG_ENV_IS_IN_UBI) && \ !defined(CONFIG_ENV_IS_NOWHERE) # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\ -SPI_FLASH|NVRAM|MMC|FAT|REMOTE|UBI} or CONFIG_ENV_IS_NOWHERE +SPI_FLASH|NVRAM|MMC|FAT|EXT4|REMOTE|UBI} or CONFIG_ENV_IS_NOWHERE #endif
/* diff --git a/common/env_ext4.c b/common/env_ext4.c new file mode 100644 index 0000000..ce748ed --- /dev/null +++ b/common/env_ext4.c @@ -0,0 +1,127 @@ +/* + * (c) Copyright 2016 by VRT Technology + * + * Author: + * Stuart Longland stuartl@vrt.com.au + * + * Based on FAT environment driver + * (c) Copyright 2011 by Tigris Elektronik GmbH + * + * Author: + * Maximilian Schwerin mvs@tigris.de + * + * and EXT4 filesystem implementation + * (C) Copyright 2011 - 2012 Samsung Electronics + * EXT4 filesystem implementation in Uboot by + * Uma Shankar uma.shankar@samsung.com + * Manjunatha C Achar a.manjunatha@samsung.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> + +#include <command.h> +#include <environment.h> +#include <linux/stddef.h> +#include <malloc.h> +#include <search.h> +#include <errno.h> +#include <ext4fs.h> +#include <mmc.h> + +char *env_name_spec = "EXT4"; + +env_t *env_ptr; + +DECLARE_GLOBAL_DATA_PTR; + +int env_init(void) +{ + /* use default */ + gd->env_addr = (ulong)&default_environment[0]; + gd->env_valid = 1; + + return 0; +} + +#ifdef CONFIG_CMD_SAVEENV +int saveenv(void) +{ + env_t env_new; + block_dev_desc_t *dev_desc = NULL; + disk_partition_t info; + int dev, part; + int err; + + err = env_export(&env_new); + if (err) + return err; + + part = get_device_and_partition(EXT4_ENV_INTERFACE, + EXT4_ENV_DEVICE_AND_PART, + &dev_desc, &info, 1); + if (part < 0) + return 1; + + dev = dev_desc->dev; + ext4fs_set_blk_dev(dev_desc, &info); + + if (!ext4fs_mount(info.size)) { + printf("\n** Unable to use %s %s for saveenv **\n", + EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART); + return 1; + } + + err = ext4fs_write(EXT4_ENV_FILE, (void *)&env_new, sizeof(env_t)); + ext4fs_close(); + + if (err == -1) { + printf("\n** Unable to write "%s" from %s%d:%d **\n", + EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part); + return 1; + } + + puts("done\n"); + return 0; +} +#endif /* CONFIG_CMD_SAVEENV */ + +void env_relocate_spec(void) +{ + ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE); + block_dev_desc_t *dev_desc = NULL; + disk_partition_t info; + int dev, part; + int err; + + part = get_device_and_partition(EXT4_ENV_INTERFACE, + EXT4_ENV_DEVICE_AND_PART, + &dev_desc, &info, 1); + if (part < 0) + goto err_env_relocate; + + dev = dev_desc->dev; + ext4fs_set_blk_dev(dev_desc, &info); + + if (!ext4fs_mount(info.size)) { + printf("\n** Unable to use %s %s for loading the env **\n", + EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART); + goto err_env_relocate; + } + + err = ext4_read_file(EXT4_ENV_FILE, buf, 0, CONFIG_ENV_SIZE); + ext4fs_close(); + + if (err == -1) { + printf("\n** Unable to read "%s" from %s%d:%d **\n", + EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part); + goto err_env_relocate; + } + + env_import(buf, 1); + return; + +err_env_relocate: + set_default_env(NULL); +}