part.h 16 KB

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  1. /* SPDX-License-Identifier: GPL-2.0+ */
  2. /*
  3. * (C) Copyright 2000-2004
  4. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  5. */
  6. #ifndef _PART_H
  7. #define _PART_H
  8. #include <blk.h>
  9. #include <ide.h>
  10. #include <uuid.h>
  11. #include <linux/list.h>
  12. struct block_drvr {
  13. char *name;
  14. int (*select_hwpart)(int dev_num, int hwpart);
  15. };
  16. #define LOG2(x) (((x & 0xaaaaaaaa) ? 1 : 0) + ((x & 0xcccccccc) ? 2 : 0) + \
  17. ((x & 0xf0f0f0f0) ? 4 : 0) + ((x & 0xff00ff00) ? 8 : 0) + \
  18. ((x & 0xffff0000) ? 16 : 0))
  19. #define LOG2_INVALID(type) ((type)((sizeof(type)<<3)-1))
  20. /* Part types */
  21. #define PART_TYPE_UNKNOWN 0x00
  22. #define PART_TYPE_MAC 0x01
  23. #define PART_TYPE_DOS 0x02
  24. #define PART_TYPE_ISO 0x03
  25. #define PART_TYPE_AMIGA 0x04
  26. #define PART_TYPE_EFI 0x05
  27. /* maximum number of partition entries supported by search */
  28. #define DOS_ENTRY_NUMBERS 8
  29. #define ISO_ENTRY_NUMBERS 64
  30. #define MAC_ENTRY_NUMBERS 64
  31. #define AMIGA_ENTRY_NUMBERS 8
  32. /*
  33. * Type string for U-Boot bootable partitions
  34. */
  35. #define BOOT_PART_TYPE "U-Boot" /* primary boot partition type */
  36. #define BOOT_PART_COMP "PPCBoot" /* PPCBoot compatibility type */
  37. /* device types */
  38. #define DEV_TYPE_UNKNOWN 0xff /* not connected */
  39. #define DEV_TYPE_HARDDISK 0x00 /* harddisk */
  40. #define DEV_TYPE_TAPE 0x01 /* Tape */
  41. #define DEV_TYPE_CDROM 0x05 /* CD-ROM */
  42. #define DEV_TYPE_OPDISK 0x07 /* optical disk */
  43. #define PART_NAME_LEN 32
  44. #define PART_TYPE_LEN 32
  45. #define MAX_SEARCH_PARTITIONS 64
  46. #define PART_BOOTABLE ((int)BIT(0))
  47. #define PART_EFI_SYSTEM_PARTITION ((int)BIT(1))
  48. struct disk_partition {
  49. lbaint_t start; /* # of first block in partition */
  50. lbaint_t size; /* number of blocks in partition */
  51. ulong blksz; /* block size in bytes */
  52. uchar name[PART_NAME_LEN]; /* partition name */
  53. uchar type[PART_TYPE_LEN]; /* string type description */
  54. /*
  55. * The bootable is a bitmask with the following fields:
  56. *
  57. * PART_BOOTABLE the MBR bootable flag is set
  58. * PART_EFI_SYSTEM_PARTITION the partition is an EFI system partition
  59. */
  60. int bootable;
  61. #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
  62. char uuid[UUID_STR_LEN + 1]; /* filesystem UUID as string, if exists */
  63. #endif
  64. #ifdef CONFIG_PARTITION_TYPE_GUID
  65. char type_guid[UUID_STR_LEN + 1]; /* type GUID as string, if exists */
  66. #endif
  67. #ifdef CONFIG_DOS_PARTITION
  68. uchar sys_ind; /* partition type */
  69. #endif
  70. };
  71. struct disk_part {
  72. int partnum;
  73. struct disk_partition gpt_part_info;
  74. struct list_head list;
  75. };
  76. /* Misc _get_dev functions */
  77. #ifdef CONFIG_PARTITIONS
  78. /**
  79. * blk_get_dev() - get a pointer to a block device given its type and number
  80. *
  81. * Each interface allocates its own devices and typically struct blk_desc is
  82. * contained with the interface's data structure. There is no global
  83. * numbering for block devices, so the interface name must be provided.
  84. *
  85. * @ifname: Interface name (e.g. "ide", "scsi")
  86. * @dev: Device number (0 for first device on that interface, 1 for
  87. * second, etc.
  88. * @return pointer to the block device, or NULL if not available, or an
  89. * error occurred.
  90. */
  91. struct blk_desc *blk_get_dev(const char *ifname, int dev);
  92. struct blk_desc *mg_disk_get_dev(int dev);
  93. int host_get_dev_err(int dev, struct blk_desc **blk_devp);
  94. /* disk/part.c */
  95. int part_get_info(struct blk_desc *dev_desc, int part,
  96. struct disk_partition *info);
  97. /**
  98. * part_get_info_whole_disk() - get partition info for the special case of
  99. * a partition occupying the entire disk.
  100. */
  101. int part_get_info_whole_disk(struct blk_desc *dev_desc,
  102. struct disk_partition *info);
  103. void part_print(struct blk_desc *dev_desc);
  104. void part_init(struct blk_desc *dev_desc);
  105. void dev_print(struct blk_desc *dev_desc);
  106. /**
  107. * blk_get_device_by_str() - Get a block device given its interface/hw partition
  108. *
  109. * Each interface allocates its own devices and typically struct blk_desc is
  110. * contained with the interface's data structure. There is no global
  111. * numbering for block devices, so the interface name must be provided.
  112. *
  113. * The hardware parition is not related to the normal software partitioning
  114. * of a device - each hardware partition is effectively a separately
  115. * accessible block device. When a hardware parition is selected on MMC the
  116. * other hardware partitions become inaccessible. The same block device is
  117. * used to access all hardware partitions, but its capacity may change when a
  118. * different hardware partition is selected.
  119. *
  120. * When a hardware partition number is given, the block device switches to
  121. * that hardware partition.
  122. *
  123. * @ifname: Interface name (e.g. "ide", "scsi")
  124. * @dev_str: Device and optional hw partition. This can either be a string
  125. * containing the device number (e.g. "2") or the device number
  126. * and hardware partition number (e.g. "2.4") for devices that
  127. * support it (currently only MMC).
  128. * @dev_desc: Returns a pointer to the block device on success
  129. * @return block device number (local to the interface), or -1 on error
  130. */
  131. int blk_get_device_by_str(const char *ifname, const char *dev_str,
  132. struct blk_desc **dev_desc);
  133. /**
  134. * blk_get_device_part_str() - Get a block device and partition
  135. *
  136. * This calls blk_get_device_by_str() to look up a device. It also looks up
  137. * a partition and returns information about it.
  138. *
  139. * @dev_part_str is in the format:
  140. * <dev>.<hw_part>:<part> where <dev> is the device number,
  141. * <hw_part> is the optional hardware partition number and
  142. * <part> is the partition number
  143. *
  144. * If ifname is "hostfs" then this function returns the sandbox host block
  145. * device.
  146. *
  147. * If ifname is ubi, then this function returns 0, with @info set to a
  148. * special UBI device.
  149. *
  150. * If @dev_part_str is NULL or empty or "-", then this function looks up
  151. * the "bootdevice" environment variable and uses that string instead.
  152. *
  153. * If the partition string is empty then the first partition is used. If the
  154. * partition string is "auto" then the first bootable partition is used.
  155. *
  156. * @ifname: Interface name (e.g. "ide", "scsi")
  157. * @dev_part_str: Device and partition string
  158. * @dev_desc: Returns a pointer to the block device on success
  159. * @info: Returns partition information
  160. * @allow_whole_dev: true to allow the user to select partition 0
  161. * (which means the whole device), false to require a valid
  162. * partition number >= 1
  163. * @return partition number, or -1 on error
  164. *
  165. */
  166. int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
  167. struct blk_desc **dev_desc,
  168. struct disk_partition *info, int allow_whole_dev);
  169. /**
  170. * part_get_info_by_name_type() - Search for a partition by name
  171. * for only specified partition type
  172. *
  173. * @param dev_desc - block device descriptor
  174. * @param gpt_name - the specified table entry name
  175. * @param info - returns the disk partition info
  176. * @param part_type - only search in partitions of this type
  177. *
  178. * @return - the partition number on match (starting on 1), -1 on no match,
  179. * otherwise error
  180. */
  181. int part_get_info_by_name_type(struct blk_desc *dev_desc, const char *name,
  182. struct disk_partition *info, int part_type);
  183. /**
  184. * part_get_info_by_name() - Search for a partition by name
  185. * among all available registered partitions
  186. *
  187. * @param dev_desc - block device descriptor
  188. * @param gpt_name - the specified table entry name
  189. * @param info - returns the disk partition info
  190. *
  191. * @return - the partition number on match (starting on 1), -1 on no match,
  192. * otherwise error
  193. */
  194. int part_get_info_by_name(struct blk_desc *dev_desc,
  195. const char *name, struct disk_partition *info);
  196. /**
  197. * Get partition info from dev number + part name, or dev number + part number.
  198. *
  199. * Parse a device number and partition description (either name or number)
  200. * in the form of device number plus partition name separated by a "#"
  201. * (like "device_num#partition_name") or a device number plus a partition number
  202. * separated by a ":". For example both "0#misc" and "0:1" can be valid
  203. * partition descriptions for a given interface. If the partition is found, sets
  204. * dev_desc and part_info accordingly with the information of the partition.
  205. *
  206. * @param[in] dev_iface Device interface
  207. * @param[in] dev_part_str Input partition description, like "0#misc" or "0:1"
  208. * @param[out] dev_desc Place to store the device description pointer
  209. * @param[out] part_info Place to store the partition information
  210. * @return 0 on success, or a negative on error
  211. */
  212. int part_get_info_by_dev_and_name_or_num(const char *dev_iface,
  213. const char *dev_part_str,
  214. struct blk_desc **dev_desc,
  215. struct disk_partition *part_info);
  216. /**
  217. * part_set_generic_name() - create generic partition like hda1 or sdb2
  218. *
  219. * Helper function for partition tables, which don't hold partition names
  220. * (DOS, ISO). Generates partition name out of the device type and partition
  221. * number.
  222. *
  223. * @dev_desc: pointer to the block device
  224. * @part_num: partition number for which the name is generated
  225. * @name: buffer where the name is written
  226. */
  227. void part_set_generic_name(const struct blk_desc *dev_desc,
  228. int part_num, char *name);
  229. extern const struct block_drvr block_drvr[];
  230. #else
  231. static inline struct blk_desc *blk_get_dev(const char *ifname, int dev)
  232. { return NULL; }
  233. static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; }
  234. static inline int part_get_info(struct blk_desc *dev_desc, int part,
  235. struct disk_partition *info) { return -1; }
  236. static inline int part_get_info_whole_disk(struct blk_desc *dev_desc,
  237. struct disk_partition *info)
  238. { return -1; }
  239. static inline void part_print(struct blk_desc *dev_desc) {}
  240. static inline void part_init(struct blk_desc *dev_desc) {}
  241. static inline void dev_print(struct blk_desc *dev_desc) {}
  242. static inline int blk_get_device_by_str(const char *ifname, const char *dev_str,
  243. struct blk_desc **dev_desc)
  244. { return -1; }
  245. static inline int blk_get_device_part_str(const char *ifname,
  246. const char *dev_part_str,
  247. struct blk_desc **dev_desc,
  248. struct disk_partition *info,
  249. int allow_whole_dev)
  250. { *dev_desc = NULL; return -1; }
  251. #endif
  252. /*
  253. * We don't support printing partition information in SPL and only support
  254. * getting partition information in a few cases.
  255. */
  256. #ifdef CONFIG_SPL_BUILD
  257. # define part_print_ptr(x) NULL
  258. # if defined(CONFIG_SPL_FS_EXT4) || defined(CONFIG_SPL_FS_FAT) || \
  259. defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION)
  260. # define part_get_info_ptr(x) x
  261. # else
  262. # define part_get_info_ptr(x) NULL
  263. # endif
  264. #else
  265. #define part_print_ptr(x) x
  266. #define part_get_info_ptr(x) x
  267. #endif
  268. struct part_driver {
  269. const char *name;
  270. int part_type;
  271. const int max_entries; /* maximum number of entries to search */
  272. /**
  273. * get_info() - Get information about a partition
  274. *
  275. * @dev_desc: Block device descriptor
  276. * @part: Partition number (1 = first)
  277. * @info: Returns partition information
  278. */
  279. int (*get_info)(struct blk_desc *dev_desc, int part,
  280. struct disk_partition *info);
  281. /**
  282. * print() - Print partition information
  283. *
  284. * @dev_desc: Block device descriptor
  285. */
  286. void (*print)(struct blk_desc *dev_desc);
  287. /**
  288. * test() - Test if a device contains this partition type
  289. *
  290. * @dev_desc: Block device descriptor
  291. * @return 0 if the block device appears to contain this partition
  292. * type, -ve if not
  293. */
  294. int (*test)(struct blk_desc *dev_desc);
  295. };
  296. /* Declare a new U-Boot partition 'driver' */
  297. #define U_BOOT_PART_TYPE(__name) \
  298. ll_entry_declare(struct part_driver, __name, part_driver)
  299. #include <part_efi.h>
  300. #if CONFIG_IS_ENABLED(EFI_PARTITION)
  301. /* disk/part_efi.c */
  302. /**
  303. * write_gpt_table() - Write the GUID Partition Table to disk
  304. *
  305. * @param dev_desc - block device descriptor
  306. * @param gpt_h - pointer to GPT header representation
  307. * @param gpt_e - pointer to GPT partition table entries
  308. *
  309. * @return - zero on success, otherwise error
  310. */
  311. int write_gpt_table(struct blk_desc *dev_desc,
  312. gpt_header *gpt_h, gpt_entry *gpt_e);
  313. /**
  314. * gpt_fill_pte(): Fill the GPT partition table entry
  315. *
  316. * @param dev_desc - block device descriptor
  317. * @param gpt_h - GPT header representation
  318. * @param gpt_e - GPT partition table entries
  319. * @param partitions - list of partitions
  320. * @param parts - number of partitions
  321. *
  322. * @return zero on success
  323. */
  324. int gpt_fill_pte(struct blk_desc *dev_desc,
  325. gpt_header *gpt_h, gpt_entry *gpt_e,
  326. struct disk_partition *partitions, int parts);
  327. /**
  328. * gpt_fill_header(): Fill the GPT header
  329. *
  330. * @param dev_desc - block device descriptor
  331. * @param gpt_h - GPT header representation
  332. * @param str_guid - disk guid string representation
  333. * @param parts_count - number of partitions
  334. *
  335. * @return - error on str_guid conversion error
  336. */
  337. int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
  338. char *str_guid, int parts_count);
  339. /**
  340. * gpt_restore(): Restore GPT partition table
  341. *
  342. * @param dev_desc - block device descriptor
  343. * @param str_disk_guid - disk GUID
  344. * @param partitions - list of partitions
  345. * @param parts - number of partitions
  346. *
  347. * @return zero on success
  348. */
  349. int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
  350. struct disk_partition *partitions, const int parts_count);
  351. /**
  352. * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
  353. *
  354. * @param dev_desc - block device descriptor
  355. * @param buf - buffer which contains the MBR and Primary GPT info
  356. *
  357. * @return - '0' on success, otherwise error
  358. */
  359. int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf);
  360. /**
  361. * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
  362. *
  363. * @param dev_desc - block device descriptor
  364. * @param buf - buffer which contains the MBR and Primary GPT info
  365. *
  366. * @return - '0' on success, otherwise error
  367. */
  368. int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf);
  369. /**
  370. * gpt_verify_headers() - Function to read and CRC32 check of the GPT's header
  371. * and partition table entries (PTE)
  372. *
  373. * As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
  374. *
  375. * @param dev_desc - block device descriptor
  376. * @param gpt_head - pointer to GPT header data read from medium
  377. * @param gpt_pte - pointer to GPT partition table enties read from medium
  378. *
  379. * @return - '0' on success, otherwise error
  380. */
  381. int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
  382. gpt_entry **gpt_pte);
  383. /**
  384. * gpt_verify_partitions() - Function to check if partitions' name, start and
  385. * size correspond to '$partitions' env variable
  386. *
  387. * This function checks if on medium stored GPT data is in sync with information
  388. * provided in '$partitions' environment variable. Specificially, name, start
  389. * and size of the partition is checked.
  390. *
  391. * @param dev_desc - block device descriptor
  392. * @param partitions - partition data read from '$partitions' env variable
  393. * @param parts - number of partitions read from '$partitions' env variable
  394. * @param gpt_head - pointer to GPT header data read from medium
  395. * @param gpt_pte - pointer to GPT partition table enties read from medium
  396. *
  397. * @return - '0' on success, otherwise error
  398. */
  399. int gpt_verify_partitions(struct blk_desc *dev_desc,
  400. struct disk_partition *partitions, int parts,
  401. gpt_header *gpt_head, gpt_entry **gpt_pte);
  402. /**
  403. * get_disk_guid() - Function to read the GUID string from a device's GPT
  404. *
  405. * This function reads the GUID string from a block device whose descriptor
  406. * is provided.
  407. *
  408. * @param dev_desc - block device descriptor
  409. * @param guid - pre-allocated string in which to return the GUID
  410. *
  411. * @return - '0' on success, otherwise error
  412. */
  413. int get_disk_guid(struct blk_desc *dev_desc, char *guid);
  414. #endif
  415. #if CONFIG_IS_ENABLED(DOS_PARTITION)
  416. /**
  417. * is_valid_dos_buf() - Ensure that a DOS MBR image is valid
  418. *
  419. * @param buf - buffer which contains the MBR
  420. *
  421. * @return - '0' on success, otherwise error
  422. */
  423. int is_valid_dos_buf(void *buf);
  424. /**
  425. * write_mbr_partition() - write DOS MBR
  426. *
  427. * @param dev_desc - block device descriptor
  428. * @param buf - buffer which contains the MBR
  429. *
  430. * @return - '0' on success, otherwise error
  431. */
  432. int write_mbr_partition(struct blk_desc *dev_desc, void *buf);
  433. #endif
  434. #endif /* _PART_H */