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https://github.com/brain-hackers/u-boot-brain
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0718f74327
Add support of opts erase for env in ext4, this opts is used by command 'env erase'. This command only fill the env file (CONFIG_ENV_EXT4_FILE) with 0, the CRC and the saved environment becomes invalid. Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
179 lines
3.5 KiB
C
179 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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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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#include <common.h>
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#include <part.h>
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#include <command.h>
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#include <env.h>
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#include <env_internal.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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__weak const char *env_ext4_get_intf(void)
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{
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return (const char *)CONFIG_ENV_EXT4_INTERFACE;
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}
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__weak const char *env_ext4_get_dev_part(void)
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{
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return (const char *)CONFIG_ENV_EXT4_DEVICE_AND_PART;
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}
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static int env_ext4_save_buffer(env_t *env_new)
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{
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struct blk_desc *dev_desc = NULL;
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struct disk_partition info;
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int dev, part;
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int err;
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const char *ifname = env_ext4_get_intf();
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const char *dev_and_part = env_ext4_get_dev_part();
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part = blk_get_device_part_str(ifname, dev_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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ifname, dev_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), FILETYPE_REG);
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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, ifname, dev, part);
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return 1;
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}
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return 0;
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}
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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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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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err = env_ext4_save_buffer(&env_new);
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if (err)
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return err;
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gd->env_valid = ENV_VALID;
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puts("done\n");
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return 0;
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}
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static int env_ext4_erase(void)
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{
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env_t env_new;
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int err;
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memset(&env_new, 0, sizeof(env_t));
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err = env_ext4_save_buffer(&env_new);
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if (err)
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return err;
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gd->env_valid = ENV_INVALID;
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puts("done\n");
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return 0;
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}
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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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struct disk_partition 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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const char *ifname = env_ext4_get_intf();
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const char *dev_and_part = env_ext4_get_dev_part();
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#ifdef CONFIG_MMC
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if (!strcmp(ifname, "mmc"))
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mmc_initialize(NULL);
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#endif
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part = blk_get_device_part_str(ifname, dev_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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ifname, dev_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, ifname, dev, part);
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goto err_env_relocate;
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}
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err = env_import(buf, 1);
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if (!err)
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gd->env_valid = ENV_VALID;
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return err;
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err_env_relocate:
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env_set_default(NULL, 0);
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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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.erase = CONFIG_IS_ENABLED(CMD_ERASEENV) ? env_ext4_erase :
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NULL,
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};
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