ext4.c 3.0 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * (c) Copyright 2016 by VRT Technology
  4. *
  5. * Author:
  6. * Stuart Longland <stuartl@vrt.com.au>
  7. *
  8. * Based on FAT environment driver
  9. * (c) Copyright 2011 by Tigris Elektronik GmbH
  10. *
  11. * Author:
  12. * Maximilian Schwerin <mvs@tigris.de>
  13. *
  14. * and EXT4 filesystem implementation
  15. * (C) Copyright 2011 - 2012 Samsung Electronics
  16. * EXT4 filesystem implementation in Uboot by
  17. * Uma Shankar <uma.shankar@samsung.com>
  18. * Manjunatha C Achar <a.manjunatha@samsung.com>
  19. */
  20. #include <common.h>
  21. #include <command.h>
  22. #include <env.h>
  23. #include <env_internal.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. __weak const char *env_ext4_get_intf(void)
  32. {
  33. return (const char *)CONFIG_ENV_EXT4_INTERFACE;
  34. }
  35. __weak const char *env_ext4_get_dev_part(void)
  36. {
  37. return (const char *)CONFIG_ENV_EXT4_DEVICE_AND_PART;
  38. }
  39. static int env_ext4_save(void)
  40. {
  41. env_t env_new;
  42. struct blk_desc *dev_desc = NULL;
  43. struct disk_partition info;
  44. int dev, part;
  45. int err;
  46. const char *ifname = env_ext4_get_intf();
  47. const char *dev_and_part = env_ext4_get_dev_part();
  48. err = env_export(&env_new);
  49. if (err)
  50. return err;
  51. part = blk_get_device_part_str(ifname, dev_and_part,
  52. &dev_desc, &info, 1);
  53. if (part < 0)
  54. return 1;
  55. dev = dev_desc->devnum;
  56. ext4fs_set_blk_dev(dev_desc, &info);
  57. if (!ext4fs_mount(info.size)) {
  58. printf("\n** Unable to use %s %s for saveenv **\n",
  59. ifname, dev_and_part);
  60. return 1;
  61. }
  62. err = ext4fs_write(CONFIG_ENV_EXT4_FILE, (void *)&env_new,
  63. sizeof(env_t), FILETYPE_REG);
  64. ext4fs_close();
  65. if (err == -1) {
  66. printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
  67. CONFIG_ENV_EXT4_FILE, ifname, dev, part);
  68. return 1;
  69. }
  70. puts("done\n");
  71. return 0;
  72. }
  73. static int env_ext4_load(void)
  74. {
  75. ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
  76. struct blk_desc *dev_desc = NULL;
  77. struct disk_partition info;
  78. int dev, part;
  79. int err;
  80. loff_t off;
  81. const char *ifname = env_ext4_get_intf();
  82. const char *dev_and_part = env_ext4_get_dev_part();
  83. #ifdef CONFIG_MMC
  84. if (!strcmp(ifname, "mmc"))
  85. mmc_initialize(NULL);
  86. #endif
  87. part = blk_get_device_part_str(ifname, dev_and_part,
  88. &dev_desc, &info, 1);
  89. if (part < 0)
  90. goto err_env_relocate;
  91. dev = dev_desc->devnum;
  92. ext4fs_set_blk_dev(dev_desc, &info);
  93. if (!ext4fs_mount(info.size)) {
  94. printf("\n** Unable to use %s %s for loading the env **\n",
  95. ifname, dev_and_part);
  96. goto err_env_relocate;
  97. }
  98. err = ext4_read_file(CONFIG_ENV_EXT4_FILE, buf, 0, CONFIG_ENV_SIZE,
  99. &off);
  100. ext4fs_close();
  101. if (err == -1) {
  102. printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
  103. CONFIG_ENV_EXT4_FILE, ifname, dev, part);
  104. goto err_env_relocate;
  105. }
  106. return env_import(buf, 1);
  107. err_env_relocate:
  108. env_set_default(NULL, 0);
  109. return -EIO;
  110. }
  111. U_BOOT_ENV_LOCATION(ext4) = {
  112. .location = ENVL_EXT4,
  113. ENV_NAME("EXT4")
  114. .load = env_ext4_load,
  115. .save = ENV_SAVE_PTR(env_ext4_save),
  116. };