ext4.c 3.9 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 <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. #include <scsi.h>
  33. #include <asm/global_data.h>
  34. DECLARE_GLOBAL_DATA_PTR;
  35. __weak const char *env_ext4_get_intf(void)
  36. {
  37. return (const char *)CONFIG_ENV_EXT4_INTERFACE;
  38. }
  39. __weak const char *env_ext4_get_dev_part(void)
  40. {
  41. #ifdef CONFIG_MMC
  42. static char *part_str;
  43. if (!part_str) {
  44. part_str = CONFIG_ENV_EXT4_DEVICE_AND_PART;
  45. if (!strcmp(CONFIG_ENV_EXT4_INTERFACE, "mmc") && part_str[0] == ':') {
  46. part_str = "0" CONFIG_ENV_EXT4_DEVICE_AND_PART;
  47. part_str[0] += mmc_get_env_dev();
  48. }
  49. }
  50. return part_str;
  51. #else
  52. return (const char *)CONFIG_ENV_EXT4_DEVICE_AND_PART;
  53. #endif
  54. }
  55. static int env_ext4_save_buffer(env_t *env_new)
  56. {
  57. struct blk_desc *dev_desc = NULL;
  58. struct disk_partition info;
  59. int dev, part;
  60. int err;
  61. const char *ifname = env_ext4_get_intf();
  62. const char *dev_and_part = env_ext4_get_dev_part();
  63. part = blk_get_device_part_str(ifname, dev_and_part,
  64. &dev_desc, &info, 1);
  65. if (part < 0)
  66. return 1;
  67. dev = dev_desc->devnum;
  68. ext4fs_set_blk_dev(dev_desc, &info);
  69. if (!ext4fs_mount(info.size)) {
  70. printf("\n** Unable to use %s %s for saveenv **\n",
  71. ifname, dev_and_part);
  72. return 1;
  73. }
  74. err = ext4fs_write(CONFIG_ENV_EXT4_FILE, (void *)env_new,
  75. sizeof(env_t), FILETYPE_REG);
  76. ext4fs_close();
  77. if (err == -1) {
  78. printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
  79. CONFIG_ENV_EXT4_FILE, ifname, dev, part);
  80. return 1;
  81. }
  82. return 0;
  83. }
  84. static int env_ext4_save(void)
  85. {
  86. env_t env_new;
  87. int err;
  88. err = env_export(&env_new);
  89. if (err)
  90. return err;
  91. err = env_ext4_save_buffer(&env_new);
  92. if (err)
  93. return err;
  94. gd->env_valid = ENV_VALID;
  95. puts("done\n");
  96. return 0;
  97. }
  98. static int env_ext4_erase(void)
  99. {
  100. env_t env_new;
  101. int err;
  102. memset(&env_new, 0, sizeof(env_t));
  103. err = env_ext4_save_buffer(&env_new);
  104. if (err)
  105. return err;
  106. gd->env_valid = ENV_INVALID;
  107. puts("done\n");
  108. return 0;
  109. }
  110. static int env_ext4_load(void)
  111. {
  112. ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
  113. struct blk_desc *dev_desc = NULL;
  114. struct disk_partition info;
  115. int dev, part;
  116. int err;
  117. loff_t off;
  118. const char *ifname = env_ext4_get_intf();
  119. const char *dev_and_part = env_ext4_get_dev_part();
  120. #ifdef CONFIG_MMC
  121. if (!strcmp(ifname, "mmc"))
  122. mmc_initialize(NULL);
  123. #endif
  124. #if defined(CONFIG_AHCI) || defined(CONFIG_SCSI)
  125. if (!strcmp(ifname, "scsi"))
  126. scsi_scan(true);
  127. #endif
  128. part = blk_get_device_part_str(ifname, dev_and_part,
  129. &dev_desc, &info, 1);
  130. if (part < 0)
  131. goto err_env_relocate;
  132. dev = dev_desc->devnum;
  133. ext4fs_set_blk_dev(dev_desc, &info);
  134. if (!ext4fs_mount(info.size)) {
  135. printf("\n** Unable to use %s %s for loading the env **\n",
  136. ifname, dev_and_part);
  137. goto err_env_relocate;
  138. }
  139. err = ext4_read_file(CONFIG_ENV_EXT4_FILE, buf, 0, CONFIG_ENV_SIZE,
  140. &off);
  141. ext4fs_close();
  142. if (err == -1) {
  143. printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
  144. CONFIG_ENV_EXT4_FILE, ifname, dev, part);
  145. goto err_env_relocate;
  146. }
  147. err = env_import(buf, 1, H_EXTERNAL);
  148. if (!err)
  149. gd->env_valid = ENV_VALID;
  150. return err;
  151. err_env_relocate:
  152. env_set_default(NULL, 0);
  153. return -EIO;
  154. }
  155. U_BOOT_ENV_LOCATION(ext4) = {
  156. .location = ENVL_EXT4,
  157. ENV_NAME("EXT4")
  158. .load = env_ext4_load,
  159. .save = ENV_SAVE_PTR(env_ext4_save),
  160. .erase = ENV_ERASE_PTR(env_ext4_erase),
  161. };