[u-boot.git] / env / ext4.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (c) Copyright 2016 by VRT Technology
 *
 * Author:
 *  Stuart Longland <[email protected]>
 *
 * Based on FAT environment driver
 * (c) Copyright 2011 by Tigris Elektronik GmbH
 *
 * Author:
 *  Maximilian Schwerin <[email protected]>
 *
 * and EXT4 filesystem implementation
 * (C) Copyright 2011 - 2012 Samsung Electronics
 * EXT4 filesystem implementation in Uboot by
 * Uma Shankar <[email protected]>
 * Manjunatha C Achar <[email protected]>
 */

#include <common.h>

#include <command.h>
#include <environment.h>
#include <linux/stddef.h>
#include <malloc.h>
#include <memalign.h>
#include <search.h>
#include <errno.h>
#include <ext4fs.h>
#include <mmc.h>

#ifdef CONFIG_CMD_SAVEENV
static int env_ext4_save(void)
{
	env_t	env_new;
	struct blk_desc *dev_desc = NULL;
	disk_partition_t info;
	int dev, part;
	int err;

	err = env_export(&env_new);
	if (err)
		return err;

	part = blk_get_device_part_str(CONFIG_ENV_EXT4_INTERFACE,
				       CONFIG_ENV_EXT4_DEVICE_AND_PART,
				       &dev_desc, &info, 1);
	if (part < 0)
		return 1;

	dev = dev_desc->devnum;
	ext4fs_set_blk_dev(dev_desc, &info);

	if (!ext4fs_mount(info.size)) {
		printf("\n** Unable to use %s %s for saveenv **\n",
		       CONFIG_ENV_EXT4_INTERFACE,
		       CONFIG_ENV_EXT4_DEVICE_AND_PART);
		return 1;
	}

	err = ext4fs_write(CONFIG_ENV_EXT4_FILE, (void *)&env_new,
			   sizeof(env_t), FILETYPE_REG);
	ext4fs_close();

	if (err == -1) {
		printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
			CONFIG_ENV_EXT4_FILE, CONFIG_ENV_EXT4_INTERFACE, dev,
			part);
		return 1;
	}

	puts("done\n");
	return 0;
}
#endif /* CONFIG_CMD_SAVEENV */

static int env_ext4_load(void)
{
	ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
	struct blk_desc *dev_desc = NULL;
	disk_partition_t info;
	int dev, part;
	int err;
	loff_t off;

#ifdef CONFIG_MMC
	if (!strcmp(CONFIG_ENV_EXT4_INTERFACE, "mmc"))
		mmc_initialize(NULL);
#endif

	part = blk_get_device_part_str(CONFIG_ENV_EXT4_INTERFACE,
				       CONFIG_ENV_EXT4_DEVICE_AND_PART,
				       &dev_desc, &info, 1);
	if (part < 0)
		goto err_env_relocate;

	dev = dev_desc->devnum;
	ext4fs_set_blk_dev(dev_desc, &info);

	if (!ext4fs_mount(info.size)) {
		printf("\n** Unable to use %s %s for loading the env **\n",
		       CONFIG_ENV_EXT4_INTERFACE,
		       CONFIG_ENV_EXT4_DEVICE_AND_PART);
		goto err_env_relocate;
	}

	err = ext4_read_file(CONFIG_ENV_EXT4_FILE, buf, 0, CONFIG_ENV_SIZE,
			     &off);
	ext4fs_close();

	if (err == -1) {
		printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
			CONFIG_ENV_EXT4_FILE, CONFIG_ENV_EXT4_INTERFACE, dev,
			part);
		goto err_env_relocate;
	}

	return env_import(buf, 1);

err_env_relocate:
	set_default_env(NULL, 0);

	return -EIO;
}

U_BOOT_ENV_LOCATION(ext4) = {
	.location	= ENVL_EXT4,
	ENV_NAME("EXT4")
	.load		= env_ext4_load,
	.save		= env_save_ptr(env_ext4_save),
};
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
fd1000b9 SL	2	/*
	3	* (c) Copyright 2016 by VRT Technology
	4	*
	5	* Author:
	6	* Stuart Longland <[email protected]>
	7	*
	8	* Based on FAT environment driver
	9	* (c) Copyright 2011 by Tigris Elektronik GmbH
	10	*
	11	* Author:
	12	* Maximilian Schwerin <[email protected]>
	13	*
	14	* and EXT4 filesystem implementation
	15	* (C) Copyright 2011 - 2012 Samsung Electronics
	16	* EXT4 filesystem implementation in Uboot by
	17	* Uma Shankar <[email protected]>
	18	* Manjunatha C Achar <[email protected]>
fd1000b9 SL	19	*/
	20
	21	#include <common.h>
	22
	23	#include <command.h>
	24	#include <environment.h>
	25	#include <linux/stddef.h>
	26	#include <malloc.h>
bd62e241	27	#include <memalign.h>
fd1000b9 SL	28	#include <search.h>
	29	#include <errno.h>
	30	#include <ext4fs.h>
	31	#include <mmc.h>
	32
fd1000b9	33	#ifdef CONFIG_CMD_SAVEENV
e5bce247	34	static int env_ext4_save(void)
fd1000b9 SL	35	{
fd1000b9 SL	36	env_t env_new;
bd62e241	37	struct blk_desc *dev_desc = NULL;
fd1000b9 SL	38	disk_partition_t info;
	39	int dev, part;
	40	int err;
	41
	42	err = env_export(&env_new);
	43	if (err)
	44	return err;
	45
1087a794 JRO	46	part = blk_get_device_part_str(CONFIG_ENV_EXT4_INTERFACE,
	47	CONFIG_ENV_EXT4_DEVICE_AND_PART,
	48	&dev_desc, &info, 1);
fd1000b9 SL	49	if (part < 0)
	50	return 1;
	51
bd62e241	52	dev = dev_desc->devnum;
fd1000b9 SL	53	ext4fs_set_blk_dev(dev_desc, &info);
	54
	55	if (!ext4fs_mount(info.size)) {
	56	printf("\n Unable to use %s %s for saveenv \n",
1087a794 JRO	57	CONFIG_ENV_EXT4_INTERFACE,
1087a794 JRO	58	CONFIG_ENV_EXT4_DEVICE_AND_PART);
fd1000b9 SL	59	return 1;
	60	}
	61
1087a794	62	err = ext4fs_write(CONFIG_ENV_EXT4_FILE, (void *)&env_new,
5efc0686	63	sizeof(env_t), FILETYPE_REG);
fd1000b9 SL	64	ext4fs_close();
	65
	66	if (err == -1) {
	67	printf("\n Unable to write \"%s\" from %s%d:%d \n",
1087a794 JRO	68	CONFIG_ENV_EXT4_FILE, CONFIG_ENV_EXT4_INTERFACE, dev,
1087a794 JRO	69	part);
fd1000b9 SL	70	return 1;
	71	}
	72
	73	puts("done\n");
	74	return 0;
	75	}
	76	#endif /* CONFIG_CMD_SAVEENV */
	77
c5951991	78	static int env_ext4_load(void)
fd1000b9 SL	79	{
fd1000b9 SL	80	ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
bd62e241	81	struct blk_desc *dev_desc = NULL;
fd1000b9 SL	82	disk_partition_t info;
	83	int dev, part;
	84	int err;
bd62e241	85	loff_t off;
fd1000b9	86
95058fbb	87	#ifdef CONFIG_MMC
26862b4a FA	88	if (!strcmp(CONFIG_ENV_EXT4_INTERFACE, "mmc"))
26862b4a FA	89	mmc_initialize(NULL);
95058fbb	90	#endif
26862b4a	91
1087a794 JRO	92	part = blk_get_device_part_str(CONFIG_ENV_EXT4_INTERFACE,
	93	CONFIG_ENV_EXT4_DEVICE_AND_PART,
	94	&dev_desc, &info, 1);
fd1000b9 SL	95	if (part < 0)
	96	goto err_env_relocate;
	97
bd62e241	98	dev = dev_desc->devnum;
fd1000b9 SL	99	ext4fs_set_blk_dev(dev_desc, &info);
	100
	101	if (!ext4fs_mount(info.size)) {
	102	printf("\n Unable to use %s %s for loading the env \n",
1087a794 JRO	103	CONFIG_ENV_EXT4_INTERFACE,
1087a794 JRO	104	CONFIG_ENV_EXT4_DEVICE_AND_PART);
fd1000b9 SL	105	goto err_env_relocate;
	106	}
	107
1087a794 JRO	108	err = ext4_read_file(CONFIG_ENV_EXT4_FILE, buf, 0, CONFIG_ENV_SIZE,
1087a794 JRO	109	&off);
fd1000b9 SL	110	ext4fs_close();
	111
	112	if (err == -1) {
	113	printf("\n Unable to read \"%s\" from %s%d:%d \n",
1087a794 JRO	114	CONFIG_ENV_EXT4_FILE, CONFIG_ENV_EXT4_INTERFACE, dev,
1087a794 JRO	115	part);
fd1000b9 SL	116	goto err_env_relocate;
	117	}
	118
2166ebf7	119	return env_import(buf, 1);
fd1000b9 SL	120
fd1000b9 SL	121	err_env_relocate:
c5d548a9	122	set_default_env(NULL, 0);
c5951991 SG	123
c5951991 SG	124	return -EIO;
fd1000b9	125	}
4415f1d1 SG	126
	127	U_BOOT_ENV_LOCATION(ext4) = {
	128	.location = ENVL_EXT4,
ac358beb	129	ENV_NAME("EXT4")
e5bce247 SG	130	.load = env_ext4_load,
e5bce247 SG	131	.save = env_save_ptr(env_ext4_save),
4415f1d1	132	};