[J-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 <env.h>
#include <env_internal.h>
#include <linux/stddef.h>
#include <malloc.h>
#include <memalign.h>
#include <search.h>
#include <errno.h>
#include <ext4fs.h>
#include <mmc.h>

__weak const char *env_ext4_get_intf(void)
{
	return (const char *)CONFIG_ENV_EXT4_INTERFACE;
}

__weak const char *env_ext4_get_dev_part(void)
{
	return (const char *)CONFIG_ENV_EXT4_DEVICE_AND_PART;
}

#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;
	const char *ifname = env_ext4_get_intf();
	const char *dev_and_part = env_ext4_get_dev_part();

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

	part = blk_get_device_part_str(ifname, dev_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",
		       ifname, dev_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, ifname, 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;
	const char *ifname = env_ext4_get_intf();
	const char *dev_and_part = env_ext4_get_dev_part();

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

	part = blk_get_device_part_str(ifname, dev_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",
		       ifname, dev_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, ifname, dev, part);
		goto err_env_relocate;
	}

	return env_import(buf, 1);

err_env_relocate:
	env_set_default(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>
0ac7d722	24	#include <env.h>
f3998fdc	25	#include <env_internal.h>
fd1000b9 SL	26	#include <linux/stddef.h>
fd1000b9 SL	27	#include <malloc.h>
bd62e241	28	#include <memalign.h>
fd1000b9 SL	29	#include <search.h>
	30	#include <errno.h>
	31	#include <ext4fs.h>
	32	#include <mmc.h>
	33
d319edca PC	34	__weak const char *env_ext4_get_intf(void)
	35	{
	36	return (const char *)CONFIG_ENV_EXT4_INTERFACE;
	37	}
	38
	39	__weak const char *env_ext4_get_dev_part(void)
	40	{
	41	return (const char *)CONFIG_ENV_EXT4_DEVICE_AND_PART;
	42	}
	43
fd1000b9	44	#ifdef CONFIG_CMD_SAVEENV
e5bce247	45	static int env_ext4_save(void)
fd1000b9 SL	46	{
fd1000b9 SL	47	env_t env_new;
bd62e241	48	struct blk_desc *dev_desc = NULL;
fd1000b9 SL	49	disk_partition_t info;
	50	int dev, part;
	51	int err;
d319edca PC	52	const char *ifname = env_ext4_get_intf();
d319edca PC	53	const char *dev_and_part = env_ext4_get_dev_part();
fd1000b9 SL	54
	55	err = env_export(&env_new);
	56	if (err)
	57	return err;
	58
d319edca	59	part = blk_get_device_part_str(ifname, dev_and_part,
1087a794	60	&dev_desc, &info, 1);
fd1000b9 SL	61	if (part < 0)
	62	return 1;
	63
bd62e241	64	dev = dev_desc->devnum;
fd1000b9 SL	65	ext4fs_set_blk_dev(dev_desc, &info);
	66
	67	if (!ext4fs_mount(info.size)) {
	68	printf("\n Unable to use %s %s for saveenv \n",
d319edca	69	ifname, dev_and_part);
fd1000b9 SL	70	return 1;
	71	}
	72
1087a794	73	err = ext4fs_write(CONFIG_ENV_EXT4_FILE, (void *)&env_new,
5efc0686	74	sizeof(env_t), FILETYPE_REG);
fd1000b9 SL	75	ext4fs_close();
	76
	77	if (err == -1) {
	78	printf("\n Unable to write \"%s\" from %s%d:%d \n",
d319edca	79	CONFIG_ENV_EXT4_FILE, ifname, dev, part);
fd1000b9 SL	80	return 1;
	81	}
	82
	83	puts("done\n");
	84	return 0;
	85	}
	86	#endif /* CONFIG_CMD_SAVEENV */
	87
c5951991	88	static int env_ext4_load(void)
fd1000b9 SL	89	{
fd1000b9 SL	90	ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
bd62e241	91	struct blk_desc *dev_desc = NULL;
fd1000b9 SL	92	disk_partition_t info;
	93	int dev, part;
	94	int err;
bd62e241	95	loff_t off;
d319edca PC	96	const char *ifname = env_ext4_get_intf();
d319edca PC	97	const char *dev_and_part = env_ext4_get_dev_part();
fd1000b9	98
95058fbb	99	#ifdef CONFIG_MMC
d319edca	100	if (!strcmp(ifname, "mmc"))
26862b4a	101	mmc_initialize(NULL);
95058fbb	102	#endif
26862b4a	103
d319edca	104	part = blk_get_device_part_str(ifname, dev_and_part,
1087a794	105	&dev_desc, &info, 1);
fd1000b9 SL	106	if (part < 0)
	107	goto err_env_relocate;
	108
bd62e241	109	dev = dev_desc->devnum;
fd1000b9 SL	110	ext4fs_set_blk_dev(dev_desc, &info);
	111
	112	if (!ext4fs_mount(info.size)) {
	113	printf("\n Unable to use %s %s for loading the env \n",
d319edca	114	ifname, dev_and_part);
fd1000b9 SL	115	goto err_env_relocate;
	116	}
	117
1087a794 JRO	118	err = ext4_read_file(CONFIG_ENV_EXT4_FILE, buf, 0, CONFIG_ENV_SIZE,
1087a794 JRO	119	&off);
fd1000b9 SL	120	ext4fs_close();
	121
	122	if (err == -1) {
	123	printf("\n Unable to read \"%s\" from %s%d:%d \n",
d319edca	124	CONFIG_ENV_EXT4_FILE, ifname, dev, part);
fd1000b9 SL	125	goto err_env_relocate;
	126	}
	127
2166ebf7	128	return env_import(buf, 1);
fd1000b9 SL	129
fd1000b9 SL	130	err_env_relocate:
0ac7d722	131	env_set_default(NULL, 0);
c5951991 SG	132
c5951991 SG	133	return -EIO;
fd1000b9	134	}
4415f1d1 SG	135
	136	U_BOOT_ENV_LOCATION(ext4) = {
	137	.location = ENVL_EXT4,
ac358beb	138	ENV_NAME("EXT4")
e5bce247 SG	139	.load = env_ext4_load,
e5bce247 SG	140	.save = env_save_ptr(env_ext4_save),
4415f1d1	141	};