git.sur5r.net Git - u-boot/blob - common/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 <search.h>
  29 #include <errno.h>
  30 #include <ext4fs.h>
  31 #include <mmc.h>
  32
  33 char *env_name_spec = "EXT4";
  34
  35 env_t *env_ptr;
  36
  37 DECLARE_GLOBAL_DATA_PTR;
  38
  39 int env_init(void)
  40 {
  41         /* use default */
  42         gd->env_addr = (ulong)&default_environment[0];
  43         gd->env_valid = 1;
  44
  45         return 0;
  46 }
  47
  48 #ifdef CONFIG_CMD_SAVEENV
  49 int saveenv(void)
  50 {
  51         env_t   env_new;
  52         block_dev_desc_t *dev_desc = NULL;
  53         disk_partition_t info;
  54         int dev, part;
  55         int err;
  56
  57         err = env_export(&env_new);
  58         if (err)
  59                 return err;
  60
  61         part = get_device_and_partition(EXT4_ENV_INTERFACE,
  62                                         EXT4_ENV_DEVICE_AND_PART,
  63                                         &dev_desc, &info, 1);
  64         if (part < 0)
  65                 return 1;
  66
  67         dev = dev_desc->dev;
  68         ext4fs_set_blk_dev(dev_desc, &info);
  69
  70         if (!ext4fs_mount(info.size)) {
  71                 printf("\n** Unable to use %s %s for saveenv **\n",
  72                        EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART);
  73                 return 1;
  74         }
  75
  76         err = ext4fs_write(EXT4_ENV_FILE, (void *)&env_new, sizeof(env_t));
  77         ext4fs_close();
  78
  79         if (err == -1) {
  80                 printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
  81                         EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part);
  82                 return 1;
  83         }
  84
  85         puts("done\n");
  86         return 0;
  87 }
  88 #endif /* CONFIG_CMD_SAVEENV */
  89
  90 void env_relocate_spec(void)
  91 {
  92         ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
  93         block_dev_desc_t *dev_desc = NULL;
  94         disk_partition_t info;
  95         int dev, part;
  96         int err;
  97
  98         part = get_device_and_partition(EXT4_ENV_INTERFACE,
  99                                         EXT4_ENV_DEVICE_AND_PART,
 100                                         &dev_desc, &info, 1);
 101         if (part < 0)
 102                 goto err_env_relocate;
 103
 104         dev = dev_desc->dev;
 105         ext4fs_set_blk_dev(dev_desc, &info);
 106
 107         if (!ext4fs_mount(info.size)) {
 108                 printf("\n** Unable to use %s %s for loading the env **\n",
 109                        EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART);
 110                 goto err_env_relocate;
 111         }
 112
 113         err = ext4_read_file(EXT4_ENV_FILE, buf, 0, CONFIG_ENV_SIZE);
 114         ext4fs_close();
 115
 116         if (err == -1) {
 117                 printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
 118                         EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part);
 119                 goto err_env_relocate;
 120         }
 121
 122         env_import(buf, 1);
 123         return;
 124
 125 err_env_relocate:
 126         set_default_env(NULL);
 127 }