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2166ebf783
For multiple env drivers to correctly implement fallback when one environment fails to load (e.g. crc error), the return value of env_import has to be propagated by all env driver's load function. Without this change, the first driver that succeeds to load an environment with an invalid CRC return 0 (success) and no other drivers are checked. Signed-off-by: Simon Goldschmidt <sgoldschmidt@de.pepperl-fuchs.com> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
131 lines
2.8 KiB
C
131 lines
2.8 KiB
C
/*
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* (c) Copyright 2016 by VRT Technology
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*
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* Author:
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* Stuart Longland <stuartl@vrt.com.au>
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*
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* Based on FAT environment driver
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* (c) Copyright 2011 by Tigris Elektronik GmbH
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*
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* Author:
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* Maximilian Schwerin <mvs@tigris.de>
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*
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* and EXT4 filesystem implementation
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* (C) Copyright 2011 - 2012 Samsung Electronics
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* EXT4 filesystem implementation in Uboot by
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* Uma Shankar <uma.shankar@samsung.com>
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* Manjunatha C Achar <a.manjunatha@samsung.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <command.h>
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#include <environment.h>
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#include <linux/stddef.h>
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#include <malloc.h>
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#include <memalign.h>
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#include <search.h>
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#include <errno.h>
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#include <ext4fs.h>
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#include <mmc.h>
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DECLARE_GLOBAL_DATA_PTR;
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#ifdef CONFIG_CMD_SAVEENV
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static int env_ext4_save(void)
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{
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env_t env_new;
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struct blk_desc *dev_desc = NULL;
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disk_partition_t info;
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int dev, part;
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int err;
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err = env_export(&env_new);
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if (err)
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return err;
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part = blk_get_device_part_str(CONFIG_ENV_EXT4_INTERFACE,
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CONFIG_ENV_EXT4_DEVICE_AND_PART,
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&dev_desc, &info, 1);
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if (part < 0)
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return 1;
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dev = dev_desc->devnum;
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ext4fs_set_blk_dev(dev_desc, &info);
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if (!ext4fs_mount(info.size)) {
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printf("\n** Unable to use %s %s for saveenv **\n",
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CONFIG_ENV_EXT4_INTERFACE,
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CONFIG_ENV_EXT4_DEVICE_AND_PART);
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return 1;
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}
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err = ext4fs_write(CONFIG_ENV_EXT4_FILE, (void *)&env_new,
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sizeof(env_t));
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ext4fs_close();
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if (err == -1) {
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printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
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CONFIG_ENV_EXT4_FILE, CONFIG_ENV_EXT4_INTERFACE, dev,
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part);
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return 1;
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}
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puts("done\n");
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return 0;
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}
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#endif /* CONFIG_CMD_SAVEENV */
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static int env_ext4_load(void)
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{
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ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
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struct blk_desc *dev_desc = NULL;
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disk_partition_t info;
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int dev, part;
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int err;
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loff_t off;
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part = blk_get_device_part_str(CONFIG_ENV_EXT4_INTERFACE,
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CONFIG_ENV_EXT4_DEVICE_AND_PART,
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&dev_desc, &info, 1);
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if (part < 0)
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goto err_env_relocate;
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dev = dev_desc->devnum;
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ext4fs_set_blk_dev(dev_desc, &info);
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if (!ext4fs_mount(info.size)) {
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printf("\n** Unable to use %s %s for loading the env **\n",
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CONFIG_ENV_EXT4_INTERFACE,
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CONFIG_ENV_EXT4_DEVICE_AND_PART);
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goto err_env_relocate;
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}
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err = ext4_read_file(CONFIG_ENV_EXT4_FILE, buf, 0, CONFIG_ENV_SIZE,
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&off);
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ext4fs_close();
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if (err == -1) {
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printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
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CONFIG_ENV_EXT4_FILE, CONFIG_ENV_EXT4_INTERFACE, dev,
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part);
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goto err_env_relocate;
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}
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return env_import(buf, 1);
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err_env_relocate:
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set_default_env(NULL);
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return -EIO;
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}
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U_BOOT_ENV_LOCATION(ext4) = {
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.location = ENVL_EXT4,
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ENV_NAME("EXT4")
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.load = env_ext4_load,
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.save = env_save_ptr(env_ext4_save),
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};
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