host.c 4.7 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (c) 2012, Google Inc.
  4. */
  5. #include <common.h>
  6. #include <command.h>
  7. #include <dm.h>
  8. #include <fs.h>
  9. #include <part.h>
  10. #include <sandboxblockdev.h>
  11. #include <dm/device_compat.h>
  12. #include <linux/errno.h>
  13. static int host_curr_device = -1;
  14. static int do_host_load(struct cmd_tbl *cmdtp, int flag, int argc,
  15. char *const argv[])
  16. {
  17. return do_load(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  18. }
  19. static int do_host_ls(struct cmd_tbl *cmdtp, int flag, int argc,
  20. char *const argv[])
  21. {
  22. return do_ls(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  23. }
  24. static int do_host_size(struct cmd_tbl *cmdtp, int flag, int argc,
  25. char *const argv[])
  26. {
  27. return do_size(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  28. }
  29. static int do_host_save(struct cmd_tbl *cmdtp, int flag, int argc,
  30. char *const argv[])
  31. {
  32. return do_save(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  33. }
  34. static int do_host_bind(struct cmd_tbl *cmdtp, int flag, int argc,
  35. char *const argv[])
  36. {
  37. bool removable = false;
  38. const char *dev_str;
  39. char *file;
  40. char *ep;
  41. int dev;
  42. /* Skip 'bind' */
  43. argc--;
  44. argv++;
  45. if (argc < 2)
  46. return CMD_RET_USAGE;
  47. if (!strcmp(argv[0], "-r")) {
  48. removable = true;
  49. argc--;
  50. argv++;
  51. }
  52. if (argc > 2)
  53. return CMD_RET_USAGE;
  54. dev_str = argv[0];
  55. dev = hextoul(dev_str, &ep);
  56. if (*ep) {
  57. printf("** Bad device specification %s **\n", dev_str);
  58. return CMD_RET_USAGE;
  59. }
  60. file = argc > 1 ? argv[1] : NULL;
  61. return !!host_dev_bind(dev, file, removable);
  62. }
  63. static int do_host_info(struct cmd_tbl *cmdtp, int flag, int argc,
  64. char *const argv[])
  65. {
  66. if (argc < 1 || argc > 2)
  67. return CMD_RET_USAGE;
  68. int min_dev = 0;
  69. int max_dev = CONFIG_HOST_MAX_DEVICES - 1;
  70. if (argc >= 2) {
  71. char *ep;
  72. char *dev_str = argv[1];
  73. int dev = hextoul(dev_str, &ep);
  74. if (*ep) {
  75. printf("** Bad device specification %s **\n", dev_str);
  76. return CMD_RET_USAGE;
  77. }
  78. min_dev = dev;
  79. max_dev = dev;
  80. }
  81. int dev;
  82. printf("%3s %12s %s\n", "dev", "blocks", "path");
  83. for (dev = min_dev; dev <= max_dev; dev++) {
  84. struct blk_desc *blk_dev;
  85. int ret;
  86. printf("%3d ", dev);
  87. ret = host_get_dev_err(dev, &blk_dev);
  88. if (ret) {
  89. if (ret == -ENOENT)
  90. puts("Not bound to a backing file\n");
  91. else if (ret == -ENODEV)
  92. puts("Invalid host device number\n");
  93. continue;
  94. }
  95. struct host_block_dev *host_dev;
  96. #ifdef CONFIG_BLK
  97. host_dev = dev_get_plat(blk_dev->bdev);
  98. #else
  99. host_dev = blk_dev->priv;
  100. #endif
  101. printf("%12lu %s\n", (unsigned long)blk_dev->lba,
  102. host_dev->filename);
  103. }
  104. return 0;
  105. }
  106. static int do_host_dev(struct cmd_tbl *cmdtp, int flag, int argc,
  107. char *const argv[])
  108. {
  109. int dev;
  110. char *ep;
  111. struct blk_desc *blk_dev;
  112. int ret;
  113. if (argc < 1 || argc > 3)
  114. return CMD_RET_USAGE;
  115. if (argc == 1) {
  116. if (host_curr_device < 0) {
  117. printf("No current host device\n");
  118. return 1;
  119. }
  120. printf("Current host device %d\n", host_curr_device);
  121. return 0;
  122. }
  123. dev = hextoul(argv[1], &ep);
  124. if (*ep) {
  125. printf("** Bad device specification %s **\n", argv[2]);
  126. return CMD_RET_USAGE;
  127. }
  128. ret = host_get_dev_err(dev, &blk_dev);
  129. if (ret) {
  130. if (ret == -ENOENT)
  131. puts("Not bound to a backing file\n");
  132. else if (ret == -ENODEV)
  133. puts("Invalid host device number\n");
  134. return 1;
  135. }
  136. host_curr_device = dev;
  137. return 0;
  138. }
  139. static struct cmd_tbl cmd_host_sub[] = {
  140. U_BOOT_CMD_MKENT(load, 7, 0, do_host_load, "", ""),
  141. U_BOOT_CMD_MKENT(ls, 3, 0, do_host_ls, "", ""),
  142. U_BOOT_CMD_MKENT(save, 6, 0, do_host_save, "", ""),
  143. U_BOOT_CMD_MKENT(size, 3, 0, do_host_size, "", ""),
  144. U_BOOT_CMD_MKENT(bind, 4, 0, do_host_bind, "", ""),
  145. U_BOOT_CMD_MKENT(info, 3, 0, do_host_info, "", ""),
  146. U_BOOT_CMD_MKENT(dev, 0, 1, do_host_dev, "", ""),
  147. };
  148. static int do_host(struct cmd_tbl *cmdtp, int flag, int argc,
  149. char *const argv[])
  150. {
  151. struct cmd_tbl *c;
  152. /* Skip past 'host' */
  153. argc--;
  154. argv++;
  155. c = find_cmd_tbl(argv[0], cmd_host_sub,
  156. ARRAY_SIZE(cmd_host_sub));
  157. if (c)
  158. return c->cmd(cmdtp, flag, argc, argv);
  159. else
  160. return CMD_RET_USAGE;
  161. }
  162. U_BOOT_CMD(
  163. host, 8, 1, do_host,
  164. "Miscellaneous host commands",
  165. "load hostfs - <addr> <filename> [<bytes> <offset>] - "
  166. "load a file from host\n"
  167. "host ls hostfs - <filename> - list files on host\n"
  168. "host save hostfs - <addr> <filename> <bytes> [<offset>] - "
  169. "save a file to host\n"
  170. "host size hostfs - <filename> - determine size of file on host\n"
  171. "host bind [-r] <dev> [<filename>] - bind \"host\" device to file\n"
  172. " -r = mark as removable\n"
  173. "host info [<dev>] - show device binding & info\n"
  174. "host dev [<dev>] - Set or retrieve the current host device\n"
  175. "host commands use the \"hostfs\" device. The \"host\" device is used\n"
  176. "with standard IO commands such as fatls or ext2load"
  177. );