include/part.h

   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
   9 #include <blk.h>
  10 #include <ide.h>
  11 #include <uuid.h>
  12 #include <linker_lists.h>
  13 #include <linux/errno.h>
  14 #include <linux/list.h>
  15
  16 struct block_drvr {
  17         char *name;
  18         int (*select_hwpart)(int dev_num, int hwpart);
  19 };
  20
  21 #define LOG2(x) (((x & 0xaaaaaaaa) ? 1 : 0) + ((x & 0xcccccccc) ? 2 : 0) + \
  22                  ((x & 0xf0f0f0f0) ? 4 : 0) + ((x & 0xff00ff00) ? 8 : 0) + \
  23                  ((x & 0xffff0000) ? 16 : 0))
  24 #define LOG2_INVALID(type) ((type)((sizeof(type)<<3)-1))
  25
  26 /* Part types */
  27 #define PART_TYPE_UNKNOWN       0x00
  28 #define PART_TYPE_MAC           0x01
  29 #define PART_TYPE_DOS           0x02
  30 #define PART_TYPE_ISO           0x03
  31 #define PART_TYPE_AMIGA         0x04
  32 #define PART_TYPE_EFI           0x05
  33
  34 /* maximum number of partition entries supported by search */
  35 #define DOS_ENTRY_NUMBERS       8
  36 #define ISO_ENTRY_NUMBERS       64
  37 #define MAC_ENTRY_NUMBERS       64
  38 #define AMIGA_ENTRY_NUMBERS     8
  39 /*
  40  * Type string for U-Boot bootable partitions
  41  */
  42 #define BOOT_PART_TYPE  "U-Boot"        /* primary boot partition type  */
  43 #define BOOT_PART_COMP  "PPCBoot"       /* PPCBoot compatibility type   */
  44
  45 /* device types */
  46 #define DEV_TYPE_UNKNOWN        0xff    /* not connected */
  47 #define DEV_TYPE_HARDDISK       0x00    /* harddisk */
  48 #define DEV_TYPE_TAPE           0x01    /* Tape */
  49 #define DEV_TYPE_CDROM          0x05    /* CD-ROM */
  50 #define DEV_TYPE_OPDISK         0x07    /* optical disk */
  51
  52 #define PART_NAME_LEN 32
  53 #define PART_TYPE_LEN 32
  54 #define MAX_SEARCH_PARTITIONS 128
  55
  56 #define PART_BOOTABLE                   ((int)BIT(0))
  57 #define PART_EFI_SYSTEM_PARTITION       ((int)BIT(1))
  58
  59 struct disk_partition {
  60         lbaint_t        start;  /* # of first block in partition        */
  61         lbaint_t        size;   /* number of blocks in partition        */
  62         ulong   blksz;          /* block size in bytes                  */
  63         uchar   name[PART_NAME_LEN];    /* partition name                       */
  64         uchar   type[PART_TYPE_LEN];    /* string type description              */
  65         /*
  66          * The bootable is a bitmask with the following fields:
  67          *
  68          * PART_BOOTABLE                the MBR bootable flag is set
  69          * PART_EFI_SYSTEM_PARTITION    the partition is an EFI system partition
  70          */
  71         int     bootable;
  72 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
  73         char    uuid[UUID_STR_LEN + 1]; /* filesystem UUID as string, if exists */
  74 #endif
  75 #ifdef CONFIG_PARTITION_TYPE_GUID
  76         char    type_guid[UUID_STR_LEN + 1];    /* type GUID as string, if exists       */
  77 #endif
  78 #ifdef CONFIG_DOS_PARTITION
  79         uchar   sys_ind;        /* partition type                       */
  80 #endif
  81 };
  82
  83 /* Accessors for struct disk_partition field ->uuid */
  84 extern char *__invalid_use_of_disk_partition_uuid;
  85
  86 static inline const char *disk_partition_uuid(const struct disk_partition *info)
  87 {
  88 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
  89         return info->uuid;
  90 #else
  91         return __invalid_use_of_disk_partition_uuid;
  92 #endif
  93 }
  94
  95 static inline void disk_partition_set_uuid(struct disk_partition *info,
  96                                            const char *val)
  97 {
  98 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
  99         strlcpy(info->uuid, val, UUID_STR_LEN + 1);
 100 #endif
 101 }
 102
 103 static inline void disk_partition_clr_uuid(struct disk_partition *info)
 104 {
 105 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
 106         *info->uuid = '\0';
 107 #endif
 108 }
 109
 110 struct disk_part {
 111         int partnum;
 112         struct disk_partition gpt_part_info;
 113         struct list_head list;
 114 };
 115
 116 /* Misc _get_dev functions */
 117 #if CONFIG_IS_ENABLED(PARTITIONS)
 118 /**
 119  * blk_get_dev() - get a pointer to a block device given its type and number
 120  *
 121  * Each interface allocates its own devices and typically struct blk_desc is
 122  * contained with the interface's data structure. There is no global
 123  * numbering for block devices, so the interface name must be provided.
 124  *
 125  * @ifname:     Interface name (e.g. "ide", "scsi")
 126  * @dev:        Device number (0 for first device on that interface, 1 for
 127  *              second, etc.
 128  * Return:
 129  * pointer to the block device, or NULL if not available, or an error occurred.
 130  */
 131 struct blk_desc *blk_get_dev(const char *ifname, int dev);
 132
 133 struct blk_desc *mg_disk_get_dev(int dev);
 134
 135 /**
 136  * part_get_info_by_type() - Get partitions from a block device using a specific
 137  * partition driver
 138  *
 139  * Each interface allocates its own devices and typically struct blk_desc is
 140  * contained with the interface's data structure. There is no global
 141  * numbering for block devices, so the interface name must be provided.
 142  *
 143  * @desc:       Block device descriptor
 144  * @part:       Partition number to read
 145  * @part_type:  Partition driver to use, or PART_TYPE_UNKNOWN to automatically
 146  *              choose a driver
 147  * @info:       Returned partition information
 148  *
 149  * Return: 0 on success, negative errno on failure
 150  */
 151 int part_get_info_by_type(struct blk_desc *desc, int part, int part_type,
 152                           struct disk_partition *info);
 153 int part_get_info(struct blk_desc *desc, int part,
 154                   struct disk_partition *info);
 155 /**
 156  * part_get_info_whole_disk() - get partition info for the special case of
 157  * a partition occupying the entire disk.
 158  *
 159  * @desc:       block device descriptor
 160  * @info:       returned partition information
 161  * Return:      0 on success
 162  */
 163 int part_get_info_whole_disk(struct blk_desc *desc,
 164                              struct disk_partition *info);
 165
 166 void part_print(struct blk_desc *desc);
 167 void part_init(struct blk_desc *desc);
 168 void dev_print(struct blk_desc *desc);
 169
 170 /**
 171  * blk_get_device_by_str() - Get a block device given its interface/hw partition
 172  *
 173  * Each interface allocates its own devices and typically struct blk_desc is
 174  * contained with the interface's data structure. There is no global
 175  * numbering for block devices, so the interface name must be provided.
 176  *
 177  * The hardware parition is not related to the normal software partitioning
 178  * of a device - each hardware partition is effectively a separately
 179  * accessible block device. When a hardware parition is selected on MMC the
 180  * other hardware partitions become inaccessible. The same block device is
 181  * used to access all hardware partitions, but its capacity may change when a
 182  * different hardware partition is selected.
 183  *
 184  * When a hardware partition number is given, the block device switches to
 185  * that hardware partition.
 186  *
 187  * @ifname:     Interface name (e.g. "ide", "scsi")
 188  * @dev_str:    Device and optional hw partition. This can either be a string
 189  *              containing the device number (e.g. "2") or the device number
 190  *              and hardware partition number (e.g. "2.4") for devices that
 191  *              support it (currently only MMC).
 192  * @desc:       Returns a pointer to the block device on success
 193  * Return: block device number (local to the interface), or -1 on error
 194  */
 195 int blk_get_device_by_str(const char *ifname, const char *dev_str,
 196                           struct blk_desc **desc);
 197
 198 /**
 199  * blk_get_device_part_str() - Get a block device and partition
 200  *
 201  * This calls blk_get_device_by_str() to look up a device. It also looks up
 202  * a partition and returns information about it.
 203  *
 204  * @dev_part_str is in the format <dev>.<hw_part>:<part> where
 205  *
 206  * * <dev> is the device number,
 207  *
 208  * * <hw_part> is the optional hardware partition number and
 209  *
 210  * * <part> is the partition number.
 211  *
 212  * If @ifname is "hostfs", then this function returns the sandbox host block
 213  * device.
 214  *
 215  * If @ifname is "ubi", then this function returns 0, with @info set to a
 216  * special UBI device.
 217  *
 218  * If @dev_part_str is NULL or empty or "-", then this function looks up
 219  * the "bootdevice" environment variable and uses that string instead.
 220  *
 221  * If the partition string is empty then the first partition is used. If the
 222  * partition string is "auto" then the first bootable partition is used.
 223  *
 224  * @ifname:             Interface name (e.g. "ide", "scsi")
 225  * @dev_part_str:       Device and partition string
 226  * @desc:               Returns a pointer to the block device on success
 227  * @info:               Returns partition information
 228  * @allow_whole_dev:    true to allow the user to select partition 0
 229  *                      (which means the whole device), false to require a valid
 230  *                      partition number >= 1
 231  * Return: partition number, or -1 on error
 232  *
 233  */
 234 int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
 235                             struct blk_desc **desc,
 236                             struct disk_partition *info, int allow_whole_dev);
 237
 238 /**
 239  * part_get_info_by_name() - Search for a partition by name
 240  *                           among all available registered partitions
 241  *
 242  * @desc:       block device descriptor
 243  * @name:       the specified table entry name
 244  * @info:       returns the disk partition info
 245  *
 246  * Return: the partition number on match (starting on 1), -1 on no match,
 247  * otherwise error
 248  */
 249 int part_get_info_by_name(struct blk_desc *desc, const char *name,
 250                           struct disk_partition *info);
 251
 252 /**
 253  * part_get_info_by_dev_and_name_or_num() - Get partition info from dev number
 254  *                                          and part name, or dev number and
 255  *                                          part number.
 256  *
 257  * Parse a device number and partition description (either name or number)
 258  * in the form of device number plus partition name separated by a "#"
 259  * (like "device_num#partition_name") or a device number plus a partition number
 260  * separated by a ":". For example both "0#misc" and "0:1" can be valid
 261  * partition descriptions for a given interface. If the partition is found, sets
 262  * desc and part_info accordingly with the information of the partition.
 263  *
 264  * @dev_iface:          Device interface
 265  * @dev_part_str:       Input partition description, like "0#misc" or "0:1"
 266  * @desc:               Place to store the device description pointer
 267  * @part_info:          Place to store the partition information
 268  * @allow_whole_dev:    true to allow the user to select partition 0
 269  *                      (which means the whole device), false to require a valid
 270  *                      partition number >= 1
 271  * Return:      the partition number on success, or negative errno on error
 272  */
 273 int part_get_info_by_dev_and_name_or_num(const char *dev_iface,
 274                                          const char *dev_part_str,
 275                                          struct blk_desc **desc,
 276                                          struct disk_partition *part_info,
 277                                          int allow_whole_dev);
 278
 279 /**
 280  * part_set_generic_name() - create generic partition like hda1 or sdb2
 281  *
 282  * Helper function for partition tables, which don't hold partition names
 283  * (DOS, ISO). Generates partition name out of the device type and partition
 284  * number.
 285  *
 286  * @desc:       pointer to the block device
 287  * @part_num:   partition number for which the name is generated
 288  * @name:       buffer where the name is written
 289  */
 290 void part_set_generic_name(const struct blk_desc *desc, int part_num,
 291                            char *name);
 292
 293 extern const struct block_drvr block_drvr[];
 294 #else
 295 static inline struct blk_desc *blk_get_dev(const char *ifname, int dev)
 296 { return NULL; }
 297 static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; }
 298
 299 static inline int part_get_info(struct blk_desc *desc, int part,
 300                                 struct disk_partition *info) { return -1; }
 301 static inline int part_get_info_whole_disk(struct blk_desc *desc,
 302                                            struct disk_partition *info)
 303 { return -1; }
 304 static inline void part_print(struct blk_desc *desc) {}
 305 static inline void part_init(struct blk_desc *desc) {}
 306 static inline void dev_print(struct blk_desc *desc) {}
 307 static inline int blk_get_device_by_str(const char *ifname, const char *dev_str,
 308                                         struct blk_desc **desc)
 309 { return -1; }
 310 static inline int blk_get_device_part_str(const char *ifname,
 311                                           const char *dev_part_str,
 312                                           struct blk_desc **desc,
 313                                           struct disk_partition *info,
 314                                           int allow_whole_dev)
 315 { *desc = NULL; return -1; }
 316
 317 static inline int part_get_info_by_name(struct blk_desc *desc, const char *name,
 318                                         struct disk_partition *info)
 319 {
 320         return -ENOENT;
 321 }
 322
 323 static inline int
 324 part_get_info_by_dev_and_name_or_num(const char *dev_iface,
 325                                      const char *dev_part_str,
 326                                      struct blk_desc **desc,
 327                                      struct disk_partition *part_info,
 328                                      int allow_whole_dev)
 329 {
 330         *desc = NULL;
 331         return -ENOSYS;
 332 }
 333 #endif
 334
 335 /**
 336  * part_get_bootable() - Find the first bootable partition
 337  *
 338  * @desc: Block-device descriptor
 339  * @return first bootable partition, or 0 if there is none
 340  */
 341 int part_get_bootable(struct blk_desc *desc);
 342
 343 struct udevice;
 344 /**
 345  * disk_blk_read() - read blocks from a disk partition
 346  *
 347  * @dev:        Device to read from (UCLASS_PARTITION)
 348  * @start:      Start block number to read in the partition (0=first)
 349  * @blkcnt:     Number of blocks to read
 350  * @buffer:     Destination buffer for data read
 351  * Return:      number of blocks read, or -ve error number (see the
 352  * IS_ERR_VALUE() macro
 353  */
 354 ulong disk_blk_read(struct udevice *dev, lbaint_t start, lbaint_t blkcnt,
 355                     void *buffer);
 356
 357 /**
 358  * disk_blk_write() - write to a disk partition
 359  *
 360  * @dev:        Device to write to (UCLASS_PARTITION)
 361  * @start:      Start block number to write in the partition (0=first)
 362  * @blkcnt:     Number of blocks to write
 363  * @buffer:     Source buffer for data to write
 364  * Return:      number of blocks written, or -ve error number (see the
 365  * IS_ERR_VALUE() macro
 366  */
 367 ulong disk_blk_write(struct udevice *dev, lbaint_t start, lbaint_t blkcnt,
 368                      const void *buffer);
 369
 370 /**
 371  * disk_blk_erase() - erase a section of a disk partition
 372  *
 373  * @dev:        Device to (partially) erase (UCLASS_PARTITION)
 374  * @start:      Start block number to erase in the partition (0=first)
 375  * @blkcnt:     Number of blocks to erase
 376  * Return:      number of blocks erased, or -ve error number (see the
 377  * IS_ERR_VALUE() macro
 378  */
 379 ulong disk_blk_erase(struct udevice *dev, lbaint_t start, lbaint_t blkcnt);
 380
 381 /*
 382  * We don't support printing partition information in SPL and only support
 383  * getting partition information in a few cases.
 384  */
 385 #ifdef CONFIG_SPL_BUILD
 386 # define part_print_ptr(x)      NULL
 387 # if defined(CONFIG_SPL_FS_EXT4) || defined(CONFIG_SPL_FS_FAT) || \
 388         defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION)
 389 #  define part_get_info_ptr(x)  x
 390 # else
 391 #  define part_get_info_ptr(x)  NULL
 392 # endif
 393 #else
 394 #define part_print_ptr(x)       x
 395 #define part_get_info_ptr(x)    x
 396 #endif
 397
 398 /**
 399  * struct part_driver - partition driver
 400  */
 401 struct part_driver {
 402         /** @name:      partition name */
 403         const char *name;
 404         /** @part_type: (MBR) partition type */
 405         int part_type;
 406         /** @max_entries:       maximum number of partition table entries */
 407         const int max_entries;
 408         /**
 409          * @get_info:           Get information about a partition
 410          *
 411          * @get_info.desc:      Block device descriptor
 412          * @get_info.part:      Partition number (1 = first)
 413          * @get_info.info:      Returns partition information
 414          */
 415         int (*get_info)(struct blk_desc *desc, int part,
 416                         struct disk_partition *info);
 417
 418         /**
 419          * @print:              Print partition information
 420          *
 421          * @print.desc: Block device descriptor
 422          */
 423         void (*print)(struct blk_desc *desc);
 424
 425         /**
 426          * @test:               Test if a device contains this partition type
 427          *
 428          * @test.desc:          Block device descriptor
 429          * @test.Return:
 430          * 0 if the block device appears to contain this partition type,
 431          * -ve if not
 432          */
 433         int (*test)(struct blk_desc *desc);
 434 };
 435
 436 /* Declare a new U-Boot partition 'driver' */
 437 #define U_BOOT_PART_TYPE(__name)                                        \
 438         ll_entry_declare(struct part_driver, __name, part_driver)
 439
 440 #include <part_efi.h>
 441
 442 #if CONFIG_IS_ENABLED(EFI_PARTITION)
 443 /* disk/part_efi.c */
 444 /**
 445  * write_gpt_table() - Write the GUID Partition Table to disk
 446  *
 447  * @desc:       block device descriptor
 448  * @gpt_h:      pointer to GPT header representation
 449  * @gpt_e:      pointer to GPT partition table entries
 450  *
 451  * Return:      zero on success, otherwise error
 452  */
 453 int write_gpt_table(struct blk_desc *desc, gpt_header *gpt_h, gpt_entry *gpt_e);
 454
 455 /**
 456  * gpt_fill_pte() - Fill the GPT partition table entry
 457  *
 458  * @desc:       block device descriptor
 459  * @gpt_h:      GPT header representation
 460  * @gpt_e:      GPT partition table entries
 461  * @partitions: list of partitions
 462  * @parts:      number of partitions
 463  *
 464  * Return:      zero on success
 465  */
 466 int gpt_fill_pte(struct blk_desc *desc, gpt_header *gpt_h, gpt_entry *gpt_e,
 467                  struct disk_partition *partitions, int parts);
 468
 469 /**
 470  * gpt_fill_header() - Fill the GPT header
 471  *
 472  * @desc:               block device descriptor
 473  * @gpt_h:              GPT header representation
 474  * @str_guid:           disk guid string representation
 475  * @parts_count:        number of partitions
 476  *
 477  * Return:              error on str_guid conversion error
 478  */
 479 int gpt_fill_header(struct blk_desc *desc, gpt_header *gpt_h, char *str_guid,
 480                     int parts_count);
 481
 482 /**
 483  * gpt_restore() - Restore GPT partition table
 484  *
 485  * @desc:               block device descriptor
 486  * @str_disk_guid:      disk GUID
 487  * @partitions:         list of partitions
 488  * @parts_count:        number of partitions
 489  *
 490  * Return:              0 on success
 491  */
 492 int gpt_restore(struct blk_desc *desc, char *str_disk_guid,
 493                 struct disk_partition *partitions, const int parts_count);
 494
 495 /**
 496  * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
 497  *
 498  * @desc:       block device descriptor
 499  * @buf:        buffer which contains the MBR and Primary GPT info
 500  *
 501  * Return:      0 on success, otherwise error
 502  */
 503 int is_valid_gpt_buf(struct blk_desc *desc, void *buf);
 504
 505 /**
 506  * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
 507  *
 508  * @desc:       block device descriptor
 509  * @buf:        buffer which contains the MBR and Primary GPT info
 510  *
 511  * Return:      0 on success, otherwise error
 512  */
 513 int write_mbr_and_gpt_partitions(struct blk_desc *desc, void *buf);
 514
 515 /**
 516  * gpt_verify_headers() - Read and check CRC32 of the GPT's header
 517  *                        and partition table entries (PTE)
 518  *
 519  * As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
 520  *
 521  * @desc:       block device descriptor
 522  * @gpt_head:   pointer to GPT header data read from medium
 523  * @gpt_pte:    pointer to GPT partition table enties read from medium
 524  *
 525  * Return:      0 on success, otherwise error
 526  */
 527 int gpt_verify_headers(struct blk_desc *desc, gpt_header *gpt_head,
 528                        gpt_entry **gpt_pte);
 529
 530 /**
 531  * gpt_repair_headers() - Function to repair the GPT's header
 532  *                        and partition table entries (PTE)
 533  *
 534  * @desc:       block device descriptor
 535  *
 536  * Return:      0 on success, otherwise error
 537  */
 538 int gpt_repair_headers(struct blk_desc *desc);
 539
 540 /**
 541  * gpt_verify_partitions() - Function to check if partitions' name, start and
 542  *                           size correspond to '$partitions' env variable
 543  *
 544  * This function checks if on medium stored GPT data is in sync with information
 545  * provided in '$partitions' environment variable. Specificially, name, start
 546  * and size of the partition is checked.
 547  *
 548  * @desc:       block device descriptor
 549  * @partitions: partition data read from '$partitions' env variable
 550  * @parts:      number of partitions read from '$partitions' env variable
 551  * @gpt_head:   pointer to GPT header data read from medium
 552  * @gpt_pte:    pointer to GPT partition table enties read from medium
 553  *
 554  * Return:      0 on success, otherwise error
 555  */
 556 int gpt_verify_partitions(struct blk_desc *desc,
 557                           struct disk_partition *partitions, int parts,
 558                           gpt_header *gpt_head, gpt_entry **gpt_pte);
 559
 560
 561 /**
 562  * get_disk_guid() - Read the GUID string from a device's GPT
 563  *
 564  * This function reads the GUID string from a block device whose descriptor
 565  * is provided.
 566  *
 567  * @desc:       block device descriptor
 568  * @guid:       pre-allocated string in which to return the GUID
 569  *
 570  * Return:      0 on success, otherwise error
 571  */
 572 int get_disk_guid(struct blk_desc *desc, char *guid);
 573
 574 #endif
 575
 576 #if CONFIG_IS_ENABLED(DOS_PARTITION)
 577 /**
 578  * is_valid_dos_buf() - Ensure that a DOS MBR image is valid
 579  *
 580  * @buf:        buffer which contains the MBR
 581  *
 582  * Return:      0 on success, otherwise error
 583  */
 584 int is_valid_dos_buf(void *buf);
 585
 586 /**
 587  * write_mbr_sector() - write DOS MBR
 588  *
 589  * @desc:       block device descriptor
 590  * @buf:        buffer which contains the MBR
 591  *
 592  * Return:      0 on success, otherwise error
 593  */
 594 int write_mbr_sector(struct blk_desc *desc, void *buf);
 595
 596 int write_mbr_partitions(struct blk_desc *dev,
 597                 struct disk_partition *p, int count, unsigned int disksig);
 598 int layout_mbr_partitions(struct disk_partition *p, int count,
 599                           lbaint_t total_sectors);
 600
 601 #endif
 602
 603 #if CONFIG_IS_ENABLED(PARTITIONS)
 604 /**
 605  * part_driver_get_count() - get partition driver count
 606  *
 607  * Return:      number of partition drivers
 608  */
 609 static inline int part_driver_get_count(void)
 610 {
 611         return ll_entry_count(struct part_driver, part_driver);
 612 }
 613
 614 /**
 615  * part_driver_get_first() - get first partition driver
 616  *
 617  * Return:      pointer to first partition driver on success, otherwise NULL
 618  */
 619 static inline struct part_driver *part_driver_get_first(void)
 620 {
 621         return ll_entry_start(struct part_driver, part_driver);
 622 }
 623
 624 /**
 625  * part_get_type_by_name() - Get partition type by name
 626  *
 627  * @name:       Name of partition type to look up (not case-sensitive)
 628  * Return:
 629  * Corresponding partition type (PART\_TYPE\_...) or PART\_TYPE\_UNKNOWN
 630  */
 631 int part_get_type_by_name(const char *name);
 632
 633 #else
 634 static inline int part_driver_get_count(void)
 635 { return 0; }
 636
 637 static inline struct part_driver *part_driver_get_first(void)
 638 { return NULL; }
 639 #endif /* CONFIG_PARTITIONS */
 640
 641 #endif /* _PART_H */