1 /* 2 * (C) Copyright 2000-2004 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #ifndef BLK_H 9 #define BLK_H 10 11 #include <efi.h> 12 13 #ifdef CONFIG_SYS_64BIT_LBA 14 typedef uint64_t lbaint_t; 15 #define LBAFlength "ll" 16 #else 17 typedef ulong lbaint_t; 18 #define LBAFlength "l" 19 #endif 20 #define LBAF "%" LBAFlength "x" 21 #define LBAFU "%" LBAFlength "u" 22 23 /* Interface types: */ 24 enum if_type { 25 IF_TYPE_UNKNOWN = 0, 26 IF_TYPE_IDE, 27 IF_TYPE_SCSI, 28 IF_TYPE_ATAPI, 29 IF_TYPE_USB, 30 IF_TYPE_DOC, 31 IF_TYPE_MMC, 32 IF_TYPE_SD, 33 IF_TYPE_SATA, 34 IF_TYPE_HOST, 35 IF_TYPE_SYSTEMACE, 36 IF_TYPE_NVME, 37 IF_TYPE_RKNAND, 38 IF_TYPE_SPINAND, 39 IF_TYPE_SPINOR, 40 IF_TYPE_RAMDISK, 41 IF_TYPE_MTD, 42 IF_TYPE_COUNT, /* Number of interface types */ 43 }; 44 45 /* define mtd device devnum */ 46 #define BLK_MTD_NAND 0 47 #define BLK_MTD_SPI_NAND 1 48 #define BLK_MTD_SPI_NOR 2 49 50 #define BLK_VEN_SIZE 40 51 #define BLK_PRD_SIZE 20 52 #define BLK_REV_SIZE 8 53 54 /* 55 * Identifies the partition table type (ie. MBR vs GPT GUID) signature 56 */ 57 enum sig_type { 58 SIG_TYPE_NONE, 59 SIG_TYPE_MBR, 60 SIG_TYPE_GUID, 61 62 SIG_TYPE_COUNT /* Number of signature types */ 63 }; 64 65 /* 66 * With driver model (CONFIG_BLK) this is uclass platform data, accessible 67 * with dev_get_uclass_platdata(dev) 68 */ 69 struct blk_desc { 70 /* 71 * TODO: With driver model we should be able to use the parent 72 * device's uclass instead. 73 */ 74 enum if_type if_type; /* type of the interface */ 75 int devnum; /* device number */ 76 unsigned char part_type; /* partition type */ 77 unsigned char target; /* target SCSI ID */ 78 unsigned char lun; /* target LUN */ 79 unsigned char hwpart; /* HW partition, e.g. for eMMC */ 80 unsigned char type; /* device type */ 81 unsigned char removable; /* removable device */ 82 #ifdef CONFIG_LBA48 83 /* device can use 48bit addr (ATA/ATAPI v7) */ 84 unsigned char lba48; 85 #endif 86 lbaint_t lba; /* number of blocks */ 87 unsigned long blksz; /* block size */ 88 int log2blksz; /* for convenience: log2(blksz) */ 89 char vendor[BLK_VEN_SIZE + 1]; /* device vendor string */ 90 char product[BLK_PRD_SIZE + 1]; /* device product number */ 91 char revision[BLK_REV_SIZE + 1]; /* firmware revision */ 92 enum sig_type sig_type; /* Partition table signature type */ 93 union { 94 uint32_t mbr_sig; /* MBR integer signature */ 95 efi_guid_t guid_sig; /* GPT GUID Signature */ 96 }; 97 #if CONFIG_IS_ENABLED(BLK) 98 /* 99 * For now we have a few functions which take struct blk_desc as a 100 * parameter. This field allows them to look up the associated 101 * device. Once these functions are removed we can drop this field. 102 */ 103 struct udevice *bdev; 104 #else 105 unsigned long (*block_read)(struct blk_desc *block_dev, 106 lbaint_t start, 107 lbaint_t blkcnt, 108 void *buffer); 109 unsigned long (*block_write)(struct blk_desc *block_dev, 110 lbaint_t start, 111 lbaint_t blkcnt, 112 const void *buffer); 113 unsigned long (*block_erase)(struct blk_desc *block_dev, 114 lbaint_t start, 115 lbaint_t blkcnt); 116 void *priv; /* driver private struct pointer */ 117 #endif 118 }; 119 120 #define BLOCK_CNT(size, blk_desc) (PAD_COUNT(size, blk_desc->blksz)) 121 #define PAD_TO_BLOCKSIZE(size, blk_desc) \ 122 (PAD_SIZE(size, blk_desc->blksz)) 123 124 #ifdef CONFIG_BLOCK_CACHE 125 /** 126 * blkcache_read() - attempt to read a set of blocks from cache 127 * 128 * @param iftype - IF_TYPE_x for type of device 129 * @param dev - device index of particular type 130 * @param start - starting block number 131 * @param blkcnt - number of blocks to read 132 * @param blksz - size in bytes of each block 133 * @param buf - buffer to contain cached data 134 * 135 * @return - '1' if block returned from cache, '0' otherwise. 136 */ 137 int blkcache_read(int iftype, int dev, 138 lbaint_t start, lbaint_t blkcnt, 139 unsigned long blksz, void *buffer); 140 141 /** 142 * blkcache_fill() - make data read from a block device available 143 * to the block cache 144 * 145 * @param iftype - IF_TYPE_x for type of device 146 * @param dev - device index of particular type 147 * @param start - starting block number 148 * @param blkcnt - number of blocks available 149 * @param blksz - size in bytes of each block 150 * @param buf - buffer containing data to cache 151 * 152 */ 153 void blkcache_fill(int iftype, int dev, 154 lbaint_t start, lbaint_t blkcnt, 155 unsigned long blksz, void const *buffer); 156 157 /** 158 * blkcache_invalidate() - discard the cache for a set of blocks 159 * because of a write or device (re)initialization. 160 * 161 * @param iftype - IF_TYPE_x for type of device 162 * @param dev - device index of particular type 163 */ 164 void blkcache_invalidate(int iftype, int dev); 165 166 /** 167 * blkcache_configure() - configure block cache 168 * 169 * @param blocks - maximum blocks per entry 170 * @param entries - maximum entries in cache 171 */ 172 void blkcache_configure(unsigned blocks, unsigned entries); 173 174 /* 175 * statistics of the block cache 176 */ 177 struct block_cache_stats { 178 unsigned hits; 179 unsigned misses; 180 unsigned entries; /* current entry count */ 181 unsigned max_blocks_per_entry; 182 unsigned max_entries; 183 }; 184 185 /** 186 * get_blkcache_stats() - return statistics and reset 187 * 188 * @param stats - statistics are copied here 189 */ 190 void blkcache_stats(struct block_cache_stats *stats); 191 192 #else 193 194 static inline int blkcache_read(int iftype, int dev, 195 lbaint_t start, lbaint_t blkcnt, 196 unsigned long blksz, void *buffer) 197 { 198 return 0; 199 } 200 201 static inline void blkcache_fill(int iftype, int dev, 202 lbaint_t start, lbaint_t blkcnt, 203 unsigned long blksz, void const *buffer) {} 204 205 static inline void blkcache_invalidate(int iftype, int dev) {} 206 207 #endif 208 209 #if CONFIG_IS_ENABLED(BLK) 210 struct udevice; 211 212 /* Operations on block devices */ 213 struct blk_ops { 214 /** 215 * read() - read from a block device 216 * 217 * @dev: Device to read from 218 * @start: Start block number to read (0=first) 219 * @blkcnt: Number of blocks to read 220 * @buffer: Destination buffer for data read 221 * @return number of blocks read, or -ve error number (see the 222 * IS_ERR_VALUE() macro 223 */ 224 unsigned long (*read)(struct udevice *dev, lbaint_t start, 225 lbaint_t blkcnt, void *buffer); 226 227 /** 228 * read_prepare() - read from a block device 229 * 230 * @dev: Device to read from 231 * @start: Start block number to read (0=first) 232 * @blkcnt: Number of blocks to read 233 * @buffer: Destination buffer for data read 234 * @return number of blocks read, or -ve error number (see the 235 * IS_ERR_VALUE() macro 236 */ 237 #ifdef CONFIG_SPL_BLK_READ_PREPARE 238 unsigned long (*read_prepare)(struct udevice *dev, lbaint_t start, 239 lbaint_t blkcnt, void *buffer); 240 #endif 241 /** 242 * write() - write to a block device 243 * 244 * @dev: Device to write to 245 * @start: Start block number to write (0=first) 246 * @blkcnt: Number of blocks to write 247 * @buffer: Source buffer for data to write 248 * @return number of blocks written, or -ve error number (see the 249 * IS_ERR_VALUE() macro 250 */ 251 unsigned long (*write)(struct udevice *dev, lbaint_t start, 252 lbaint_t blkcnt, const void *buffer); 253 254 /** 255 * erase() - erase a section of a block device 256 * 257 * @dev: Device to (partially) erase 258 * @start: Start block number to erase (0=first) 259 * @blkcnt: Number of blocks to erase 260 * @return number of blocks erased, or -ve error number (see the 261 * IS_ERR_VALUE() macro 262 */ 263 unsigned long (*erase)(struct udevice *dev, lbaint_t start, 264 lbaint_t blkcnt); 265 266 /** 267 * select_hwpart() - select a particular hardware partition 268 * 269 * Some devices (e.g. MMC) can support partitioning at the hardware 270 * level. This is quite separate from the normal idea of 271 * software-based partitions. MMC hardware partitions must be 272 * explicitly selected. Once selected only the region of the device 273 * covered by that partition is accessible. 274 * 275 * The MMC standard provides for two boot partitions (numbered 1 and 2), 276 * rpmb (3), and up to 4 addition general-purpose partitions (4-7). 277 * 278 * @desc: Block device to update 279 * @hwpart: Hardware partition number to select. 0 means the raw 280 * device, 1 is the first partition, 2 is the second, etc. 281 * @return 0 if OK, -ve on error 282 */ 283 int (*select_hwpart)(struct udevice *dev, int hwpart); 284 }; 285 286 #define blk_get_ops(dev) ((struct blk_ops *)(dev)->driver->ops) 287 288 /* 289 * These functions should take struct udevice instead of struct blk_desc, 290 * but this is convenient for migration to driver model. Add a 'd' prefix 291 * to the function operations, so that blk_read(), etc. can be reserved for 292 * functions with the correct arguments. 293 */ 294 unsigned long blk_dread(struct blk_desc *block_dev, lbaint_t start, 295 lbaint_t blkcnt, void *buffer); 296 #ifdef CONFIG_SPL_BLK_READ_PREPARE 297 unsigned long blk_dread_prepare(struct blk_desc *block_dev, lbaint_t start, 298 lbaint_t blkcnt, void *buffer); 299 #endif 300 unsigned long blk_dwrite(struct blk_desc *block_dev, lbaint_t start, 301 lbaint_t blkcnt, const void *buffer); 302 unsigned long blk_derase(struct blk_desc *block_dev, lbaint_t start, 303 lbaint_t blkcnt); 304 305 /** 306 * blk_find_device() - Find a block device 307 * 308 * This function does not activate the device. The device will be returned 309 * whether or not it is activated. 310 * 311 * @if_type: Interface type (enum if_type_t) 312 * @devnum: Device number (specific to each interface type) 313 * @devp: the device, if found 314 * @return 0 if found, -ENODEV if no device found, or other -ve error value 315 */ 316 int blk_find_device(int if_type, int devnum, struct udevice **devp); 317 318 /** 319 * blk_get_device() - Find and probe a block device ready for use 320 * 321 * @if_type: Interface type (enum if_type_t) 322 * @devnum: Device number (specific to each interface type) 323 * @devp: the device, if found 324 * @return 0 if found, -ENODEV if no device found, or other -ve error value 325 */ 326 int blk_get_device(int if_type, int devnum, struct udevice **devp); 327 328 /** 329 * blk_first_device() - Find the first device for a given interface 330 * 331 * The device is probed ready for use 332 * 333 * @devnum: Device number (specific to each interface type) 334 * @devp: the device, if found 335 * @return 0 if found, -ENODEV if no device, or other -ve error value 336 */ 337 int blk_first_device(int if_type, struct udevice **devp); 338 339 /** 340 * blk_next_device() - Find the next device for a given interface 341 * 342 * This can be called repeatedly after blk_first_device() to iterate through 343 * all devices of the given interface type. 344 * 345 * The device is probed ready for use 346 * 347 * @devp: On entry, the previous device returned. On exit, the next 348 * device, if found 349 * @return 0 if found, -ENODEV if no device, or other -ve error value 350 */ 351 int blk_next_device(struct udevice **devp); 352 353 /** 354 * blk_create_device() - Create a new block device 355 * 356 * @parent: Parent of the new device 357 * @drv_name: Driver name to use for the block device 358 * @name: Name for the device 359 * @if_type: Interface type (enum if_type_t) 360 * @devnum: Device number, specific to the interface type, or -1 to 361 * allocate the next available number 362 * @blksz: Block size of the device in bytes (typically 512) 363 * @size: Total size of the device in bytes 364 * @devp: the new device (which has not been probed) 365 */ 366 int blk_create_device(struct udevice *parent, const char *drv_name, 367 const char *name, int if_type, int devnum, int blksz, 368 lbaint_t size, struct udevice **devp); 369 370 /** 371 * blk_create_devicef() - Create a new named block device 372 * 373 * @parent: Parent of the new device 374 * @drv_name: Driver name to use for the block device 375 * @name: Name for the device (parent name is prepended) 376 * @if_type: Interface type (enum if_type_t) 377 * @devnum: Device number, specific to the interface type, or -1 to 378 * allocate the next available number 379 * @blksz: Block size of the device in bytes (typically 512) 380 * @size: Total size of the device in bytes 381 * @devp: the new device (which has not been probed) 382 */ 383 int blk_create_devicef(struct udevice *parent, const char *drv_name, 384 const char *name, int if_type, int devnum, int blksz, 385 lbaint_t size, struct udevice **devp); 386 387 /** 388 * blk_prepare_device() - Prepare a block device for use 389 * 390 * This reads partition information from the device if supported. 391 * 392 * @dev: Device to prepare 393 * @return 0 if ok, -ve on error 394 */ 395 int blk_prepare_device(struct udevice *dev); 396 397 /** 398 * blk_unbind_all() - Unbind all device of the given interface type 399 * 400 * The devices are removed and then unbound. 401 * 402 * @if_type: Interface type to unbind 403 * @return 0 if OK, -ve on error 404 */ 405 int blk_unbind_all(int if_type); 406 407 /** 408 * blk_find_max_devnum() - find the maximum device number for an interface type 409 * 410 * Finds the last allocated device number for an interface type @if_type. The 411 * next number is safe to use for a newly allocated device. 412 * 413 * @if_type: Interface type to scan 414 * @return maximum device number found, or -ENODEV if none, or other -ve on 415 * error 416 */ 417 int blk_find_max_devnum(enum if_type if_type); 418 419 /** 420 * blk_select_hwpart() - select a hardware partition 421 * 422 * Select a hardware partition if the device supports it (typically MMC does) 423 * 424 * @dev: Device to update 425 * @hwpart: Partition number to select 426 * @return 0 if OK, -ve on error 427 */ 428 int blk_select_hwpart(struct udevice *dev, int hwpart); 429 430 /** 431 * blk_get_from_parent() - obtain a block device by looking up its parent 432 * 433 * All devices with 434 */ 435 int blk_get_from_parent(struct udevice *parent, struct udevice **devp); 436 437 #else 438 #include <errno.h> 439 /* 440 * These functions should take struct udevice instead of struct blk_desc, 441 * but this is convenient for migration to driver model. Add a 'd' prefix 442 * to the function operations, so that blk_read(), etc. can be reserved for 443 * functions with the correct arguments. 444 */ 445 static inline ulong blk_dread(struct blk_desc *block_dev, lbaint_t start, 446 lbaint_t blkcnt, void *buffer) 447 { 448 ulong blks_read; 449 if (blkcache_read(block_dev->if_type, block_dev->devnum, 450 start, blkcnt, block_dev->blksz, buffer)) 451 return blkcnt; 452 453 /* 454 * We could check if block_read is NULL and return -ENOSYS. But this 455 * bloats the code slightly (cause some board to fail to build), and 456 * it would be an error to try an operation that does not exist. 457 */ 458 blks_read = block_dev->block_read(block_dev, start, blkcnt, buffer); 459 if (blks_read == blkcnt) 460 blkcache_fill(block_dev->if_type, block_dev->devnum, 461 start, blkcnt, block_dev->blksz, buffer); 462 463 return blks_read; 464 } 465 466 static inline ulong blk_dwrite(struct blk_desc *block_dev, lbaint_t start, 467 lbaint_t blkcnt, const void *buffer) 468 { 469 blkcache_invalidate(block_dev->if_type, block_dev->devnum); 470 return block_dev->block_write(block_dev, start, blkcnt, buffer); 471 } 472 473 static inline ulong blk_derase(struct blk_desc *block_dev, lbaint_t start, 474 lbaint_t blkcnt) 475 { 476 blkcache_invalidate(block_dev->if_type, block_dev->devnum); 477 return block_dev->block_erase(block_dev, start, blkcnt); 478 } 479 480 /** 481 * struct blk_driver - Driver for block interface types 482 * 483 * This provides access to the block devices for each interface type. One 484 * driver should be provided using U_BOOT_LEGACY_BLK() for each interface 485 * type that is to be supported. 486 * 487 * @if_typename: Interface type name 488 * @if_type: Interface type 489 * @max_devs: Maximum number of devices supported 490 * @desc: Pointer to list of devices for this interface type, 491 * or NULL to use @get_dev() instead 492 */ 493 struct blk_driver { 494 const char *if_typename; 495 enum if_type if_type; 496 int max_devs; 497 struct blk_desc *desc; 498 /** 499 * get_dev() - get a pointer to a block device given its number 500 * 501 * Each interface allocates its own devices and typically 502 * struct blk_desc is contained with the interface's data structure. 503 * There is no global numbering for block devices. This method allows 504 * the device for an interface type to be obtained when @desc is NULL. 505 * 506 * @devnum: Device number (0 for first device on that interface, 507 * 1 for second, etc. 508 * @descp: Returns pointer to the block device on success 509 * @return 0 if OK, -ve on error 510 */ 511 int (*get_dev)(int devnum, struct blk_desc **descp); 512 513 /** 514 * select_hwpart() - Select a hardware partition 515 * 516 * Some devices (e.g. MMC) can support partitioning at the hardware 517 * level. This is quite separate from the normal idea of 518 * software-based partitions. MMC hardware partitions must be 519 * explicitly selected. Once selected only the region of the device 520 * covered by that partition is accessible. 521 * 522 * The MMC standard provides for two boot partitions (numbered 1 and 2), 523 * rpmb (3), and up to 4 addition general-purpose partitions (4-7). 524 * Partition 0 is the main user-data partition. 525 * 526 * @desc: Block device descriptor 527 * @hwpart: Hardware partition number to select. 0 means the main 528 * user-data partition, 1 is the first partition, 2 is 529 * the second, etc. 530 * @return 0 if OK, other value for an error 531 */ 532 int (*select_hwpart)(struct blk_desc *desc, int hwpart); 533 }; 534 535 /* 536 * Declare a new U-Boot legacy block driver. New drivers should use driver 537 * model (UCLASS_BLK). 538 */ 539 #define U_BOOT_LEGACY_BLK(__name) \ 540 ll_entry_declare(struct blk_driver, __name, blk_driver) 541 542 struct blk_driver *blk_driver_lookup_type(int if_type); 543 544 #endif /* !CONFIG_BLK */ 545 546 /** 547 * blk_get_devnum_by_typename() - Get a block device by type and number 548 * 549 * This looks through the available block devices of the given type, returning 550 * the one with the given @devnum. 551 * 552 * @if_type: Block device type 553 * @devnum: Device number 554 * @return point to block device descriptor, or NULL if not found 555 */ 556 struct blk_desc *blk_get_devnum_by_type(enum if_type if_type, int devnum); 557 558 /** 559 * blk_get_devnum_by_type() - Get a block device by type name, and number 560 * 561 * This looks up the block device type based on @if_typename, then calls 562 * blk_get_devnum_by_type(). 563 * 564 * @if_typename: Block device type name 565 * @devnum: Device number 566 * @return point to block device descriptor, or NULL if not found 567 */ 568 struct blk_desc *blk_get_devnum_by_typename(const char *if_typename, 569 int devnum); 570 571 /** 572 * blk_dselect_hwpart() - select a hardware partition 573 * 574 * This selects a hardware partition (such as is supported by MMC). The block 575 * device size may change as this effectively points the block device to a 576 * partition at the hardware level. See the select_hwpart() method above. 577 * 578 * @desc: Block device descriptor for the device to select 579 * @hwpart: Partition number to select 580 * @return 0 if OK, -ve on error 581 */ 582 int blk_dselect_hwpart(struct blk_desc *desc, int hwpart); 583 584 /** 585 * blk_list_part() - list the partitions for block devices of a given type 586 * 587 * This looks up the partition type for each block device of type @if_type, 588 * then displays a list of partitions. 589 * 590 * @if_type: Block device type 591 * @return 0 if OK, -ENODEV if there is none of that type 592 */ 593 int blk_list_part(enum if_type if_type); 594 595 /** 596 * blk_list_devices() - list the block devices of a given type 597 * 598 * This lists each block device of the type @if_type, showing the capacity 599 * as well as type-specific information. 600 * 601 * @if_type: Block device type 602 */ 603 void blk_list_devices(enum if_type if_type); 604 605 /** 606 * blk_show_device() - show information about a given block device 607 * 608 * This shows the block device capacity as well as type-specific information. 609 * 610 * @if_type: Block device type 611 * @devnum: Device number 612 * @return 0 if OK, -ENODEV for invalid device number 613 */ 614 int blk_show_device(enum if_type if_type, int devnum); 615 616 /** 617 * blk_print_device_num() - show information about a given block device 618 * 619 * This is similar to blk_show_device() but returns an error if the block 620 * device type is unknown. 621 * 622 * @if_type: Block device type 623 * @devnum: Device number 624 * @return 0 if OK, -ENODEV for invalid device number, -ENOENT if the block 625 * device is not connected 626 */ 627 int blk_print_device_num(enum if_type if_type, int devnum); 628 629 /** 630 * blk_print_part_devnum() - print the partition information for a device 631 * 632 * @if_type: Block device type 633 * @devnum: Device number 634 * @return 0 if OK, -ENOENT if the block device is not connected, -ENOSYS if 635 * the interface type is not supported, other -ve on other error 636 */ 637 int blk_print_part_devnum(enum if_type if_type, int devnum); 638 639 /** 640 * blk_read_devnum() - read blocks from a device 641 * 642 * @if_type: Block device type 643 * @devnum: Device number 644 * @blkcnt: Number of blocks to read 645 * @buffer: Address to write data to 646 * @return number of blocks read, or -ve error number on error 647 */ 648 ulong blk_read_devnum(enum if_type if_type, int devnum, lbaint_t start, 649 lbaint_t blkcnt, void *buffer); 650 651 /** 652 * blk_write_devnum() - write blocks to a device 653 * 654 * @if_type: Block device type 655 * @devnum: Device number 656 * @blkcnt: Number of blocks to write 657 * @buffer: Address to read data from 658 * @return number of blocks written, or -ve error number on error 659 */ 660 ulong blk_write_devnum(enum if_type if_type, int devnum, lbaint_t start, 661 lbaint_t blkcnt, const void *buffer); 662 663 /** 664 * blk_select_hwpart_devnum() - select a hardware partition 665 * 666 * This is similar to blk_dselect_hwpart() but it looks up the interface and 667 * device number. 668 * 669 * @if_type: Block device type 670 * @devnum: Device number 671 * @hwpart: Partition number to select 672 * @return 0 if OK, -ve on error 673 */ 674 int blk_select_hwpart_devnum(enum if_type if_type, int devnum, int hwpart); 675 676 /** 677 * blk_get_if_type_name() - Get the name of an interface type 678 * 679 * @if_type: Interface type to check 680 * @return name of interface, or NULL if none 681 */ 682 const char *blk_get_if_type_name(enum if_type if_type); 683 684 /** 685 * blk_common_cmd() - handle common commands with block devices 686 * 687 * @args: Number of arguments to the command (argv[0] is the command itself) 688 * @argv: Command arguments 689 * @if_type: Interface type 690 * @cur_devnump: Current device number for this interface type 691 * @return 0 if OK, CMD_RET_ERROR on error 692 */ 693 int blk_common_cmd(int argc, char * const argv[], enum if_type if_type, 694 int *cur_devnump); 695 696 /** 697 * if_typename_to_iftype() - get iftype according to iftype name 698 * 699 * @if_typename: iftype name 700 * @return iftype index 701 */ 702 enum if_type if_typename_to_iftype(const char *if_typename); 703 704 #endif 705