git.sur5r.net Git - u-boot/blob - env/ext4.c

   1 /*
   2  * (c) Copyright 2016 by VRT Technology
   3  *
   4  * Author:
   5  *  Stuart Longland <stuartl@vrt.com.au>
   6  *
   7  * Based on FAT environment driver
   8  * (c) Copyright 2011 by Tigris Elektronik GmbH
   9  *
  10  * Author:
  11  *  Maximilian Schwerin <mvs@tigris.de>
  12  *
  13  * and EXT4 filesystem implementation
  14  * (C) Copyright 2011 - 2012 Samsung Electronics
  15  * EXT4 filesystem implementation in Uboot by
  16  * Uma Shankar <uma.shankar@samsung.com>
  17  * Manjunatha C Achar <a.manjunatha@samsung.com>
  18  *
  19  * SPDX-License-Identifier:     GPL-2.0+
  20  */
  21
  22 #include <common.h>
  23
  24 #include <command.h>
  25 #include <environment.h>
  26 #include <linux/stddef.h>
  27 #include <malloc.h>
  28 #include <memalign.h>
  29 #include <search.h>
  30 #include <errno.h>
  31 #include <ext4fs.h>
  32 #include <mmc.h>
  33
  34 char *env_name_spec = "EXT4";
  35
  36 env_t *env_ptr;
  37
  38 DECLARE_GLOBAL_DATA_PTR;
  39
  40 #ifdef CONFIG_CMD_SAVEENV
  41 static int env_ext4_save(void)
  42 {
  43         env_t   env_new;
  44         struct blk_desc *dev_desc = NULL;
  45         disk_partition_t info;
  46         int dev, part;
  47         int err;
  48
  49         err = env_export(&env_new);
  50         if (err)
  51                 return err;
  52
  53         part = blk_get_device_part_str(EXT4_ENV_INTERFACE,
  54                                         EXT4_ENV_DEVICE_AND_PART,
  55                                         &dev_desc, &info, 1);
  56         if (part < 0)
  57                 return 1;
  58
  59         dev = dev_desc->devnum;
  60         ext4fs_set_blk_dev(dev_desc, &info);
  61
  62         if (!ext4fs_mount(info.size)) {
  63                 printf("\n** Unable to use %s %s for saveenv **\n",
  64                        EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART);
  65                 return 1;
  66         }
  67
  68         err = ext4fs_write(EXT4_ENV_FILE, (void *)&env_new, sizeof(env_t));
  69         ext4fs_close();
  70
  71         if (err == -1) {
  72                 printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
  73                         EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part);
  74                 return 1;
  75         }
  76
  77         puts("done\n");
  78         return 0;
  79 }
  80 #endif /* CONFIG_CMD_SAVEENV */
  81
  82 static void env_ext4_load(void)
  83 {
  84         ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
  85         struct blk_desc *dev_desc = NULL;
  86         disk_partition_t info;
  87         int dev, part;
  88         int err;
  89         loff_t off;
  90
  91         part = blk_get_device_part_str(EXT4_ENV_INTERFACE,
  92                                         EXT4_ENV_DEVICE_AND_PART,
  93                                         &dev_desc, &info, 1);
  94         if (part < 0)
  95                 goto err_env_relocate;
  96
  97         dev = dev_desc->devnum;
  98         ext4fs_set_blk_dev(dev_desc, &info);
  99
 100         if (!ext4fs_mount(info.size)) {
 101                 printf("\n** Unable to use %s %s for loading the env **\n",
 102                        EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART);
 103                 goto err_env_relocate;
 104         }
 105
 106         err = ext4_read_file(EXT4_ENV_FILE, buf, 0, CONFIG_ENV_SIZE, &off);
 107         ext4fs_close();
 108
 109         if (err == -1) {
 110                 printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
 111                         EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part);
 112                 goto err_env_relocate;
 113         }
 114
 115         env_import(buf, 1);
 116         return;
 117
 118 err_env_relocate:
 119         set_default_env(NULL);
 120 }
 121
 122 U_BOOT_ENV_LOCATION(ext4) = {
 123         .location       = ENVL_EXT4,
 124         .load           = env_ext4_load,
 125         .save           = env_save_ptr(env_ext4_save),
 126 };