env_ext4.c 2.6 KB

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  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. #include <common.h>
  22. #include <command.h>
  23. #include <environment.h>
  24. #include <linux/stddef.h>
  25. #include <malloc.h>
  26. #include <memalign.h>
  27. #include <search.h>
  28. #include <errno.h>
  29. #include <ext4fs.h>
  30. #include <mmc.h>
  31. char *env_name_spec = "EXT4";
  32. env_t *env_ptr;
  33. DECLARE_GLOBAL_DATA_PTR;
  34. int env_init(void)
  35. {
  36. /* use default */
  37. gd->env_addr = (ulong)&default_environment[0];
  38. gd->env_valid = 1;
  39. return 0;
  40. }
  41. #ifdef CONFIG_CMD_SAVEENV
  42. int saveenv(void)
  43. {
  44. env_t env_new;
  45. struct blk_desc *dev_desc = NULL;
  46. disk_partition_t info;
  47. int dev, part;
  48. int err;
  49. err = env_export(&env_new);
  50. if (err)
  51. return err;
  52. part = blk_get_device_part_str(EXT4_ENV_INTERFACE,
  53. EXT4_ENV_DEVICE_AND_PART,
  54. &dev_desc, &info, 1);
  55. if (part < 0)
  56. return 1;
  57. dev = dev_desc->devnum;
  58. ext4fs_set_blk_dev(dev_desc, &info);
  59. if (!ext4fs_mount(info.size)) {
  60. printf("\n** Unable to use %s %s for saveenv **\n",
  61. EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART);
  62. return 1;
  63. }
  64. err = ext4fs_write(EXT4_ENV_FILE, (void *)&env_new, sizeof(env_t));
  65. ext4fs_close();
  66. if (err == -1) {
  67. printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
  68. EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part);
  69. return 1;
  70. }
  71. puts("done\n");
  72. return 0;
  73. }
  74. #endif /* CONFIG_CMD_SAVEENV */
  75. void env_relocate_spec(void)
  76. {
  77. ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
  78. struct blk_desc *dev_desc = NULL;
  79. disk_partition_t info;
  80. int dev, part;
  81. int err;
  82. loff_t off;
  83. part = blk_get_device_part_str(EXT4_ENV_INTERFACE,
  84. EXT4_ENV_DEVICE_AND_PART,
  85. &dev_desc, &info, 1);
  86. if (part < 0)
  87. goto err_env_relocate;
  88. dev = dev_desc->devnum;
  89. ext4fs_set_blk_dev(dev_desc, &info);
  90. if (!ext4fs_mount(info.size)) {
  91. printf("\n** Unable to use %s %s for loading the env **\n",
  92. EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART);
  93. goto err_env_relocate;
  94. }
  95. err = ext4_read_file(EXT4_ENV_FILE, buf, 0, CONFIG_ENV_SIZE, &off);
  96. ext4fs_close();
  97. if (err == -1) {
  98. printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
  99. EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part);
  100. goto err_env_relocate;
  101. }
  102. env_import(buf, 1);
  103. return;
  104. err_env_relocate:
  105. set_default_env(NULL);
  106. }