ext4.c 3.0 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
  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 <part.h>
  22. #include <command.h>
  23. #include <env.h>
  24. #include <env_internal.h>
  25. #include <linux/stddef.h>
  26. #include <malloc.h>
  27. #include <memalign.h>
  28. #include <search.h>
  29. #include <errno.h>
  30. #include <ext4fs.h>
  31. #include <mmc.h>
  32. __weak const char *env_ext4_get_intf(void)
  33. {
  34. return (const char *)CONFIG_ENV_EXT4_INTERFACE;
  35. }
  36. __weak const char *env_ext4_get_dev_part(void)
  37. {
  38. return (const char *)CONFIG_ENV_EXT4_DEVICE_AND_PART;
  39. }
  40. static int env_ext4_save(void)
  41. {
  42. env_t env_new;
  43. struct blk_desc *dev_desc = NULL;
  44. struct disk_partition info;
  45. int dev, part;
  46. int err;
  47. const char *ifname = env_ext4_get_intf();
  48. const char *dev_and_part = env_ext4_get_dev_part();
  49. err = env_export(&env_new);
  50. if (err)
  51. return err;
  52. part = blk_get_device_part_str(ifname, dev_and_part,
  53. &dev_desc, &info, 1);
  54. if (part < 0)
  55. return 1;
  56. dev = dev_desc->devnum;
  57. ext4fs_set_blk_dev(dev_desc, &info);
  58. if (!ext4fs_mount(info.size)) {
  59. printf("\n** Unable to use %s %s for saveenv **\n",
  60. ifname, dev_and_part);
  61. return 1;
  62. }
  63. err = ext4fs_write(CONFIG_ENV_EXT4_FILE, (void *)&env_new,
  64. sizeof(env_t), FILETYPE_REG);
  65. ext4fs_close();
  66. if (err == -1) {
  67. printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
  68. CONFIG_ENV_EXT4_FILE, ifname, dev, part);
  69. return 1;
  70. }
  71. puts("done\n");
  72. return 0;
  73. }
  74. static int env_ext4_load(void)
  75. {
  76. ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
  77. struct blk_desc *dev_desc = NULL;
  78. struct disk_partition info;
  79. int dev, part;
  80. int err;
  81. loff_t off;
  82. const char *ifname = env_ext4_get_intf();
  83. const char *dev_and_part = env_ext4_get_dev_part();
  84. #ifdef CONFIG_MMC
  85. if (!strcmp(ifname, "mmc"))
  86. mmc_initialize(NULL);
  87. #endif
  88. part = blk_get_device_part_str(ifname, dev_and_part,
  89. &dev_desc, &info, 1);
  90. if (part < 0)
  91. goto err_env_relocate;
  92. dev = dev_desc->devnum;
  93. ext4fs_set_blk_dev(dev_desc, &info);
  94. if (!ext4fs_mount(info.size)) {
  95. printf("\n** Unable to use %s %s for loading the env **\n",
  96. ifname, dev_and_part);
  97. goto err_env_relocate;
  98. }
  99. err = ext4_read_file(CONFIG_ENV_EXT4_FILE, buf, 0, CONFIG_ENV_SIZE,
  100. &off);
  101. ext4fs_close();
  102. if (err == -1) {
  103. printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
  104. CONFIG_ENV_EXT4_FILE, ifname, dev, part);
  105. goto err_env_relocate;
  106. }
  107. return env_import(buf, 1);
  108. err_env_relocate:
  109. env_set_default(NULL, 0);
  110. return -EIO;
  111. }
  112. U_BOOT_ENV_LOCATION(ext4) = {
  113. .location = ENVL_EXT4,
  114. ENV_NAME("EXT4")
  115. .load = env_ext4_load,
  116. .save = ENV_SAVE_PTR(env_ext4_save),
  117. };