1 /* 2 * Copyright (C) 2007 Oracle. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public 6 * License v2 as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 11 * General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public 14 * License along with this program; if not, write to the 15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 16 * Boston, MA 021110-1307, USA. 17 */ 18 19 #ifndef _UAPI_LINUX_BTRFS_H 20 #define _UAPI_LINUX_BTRFS_H 21 #include <linux/types.h> 22 #include <linux/ioctl.h> 23 24 #define BTRFS_IOCTL_MAGIC 0x94 25 #define BTRFS_VOL_NAME_MAX 255 26 #define BTRFS_LABEL_SIZE 256 27 28 /* this should be 4k */ 29 #define BTRFS_PATH_NAME_MAX 4087 30 struct btrfs_ioctl_vol_args { 31 __s64 fd; 32 char name[BTRFS_PATH_NAME_MAX + 1]; 33 }; 34 35 #define BTRFS_DEVICE_PATH_NAME_MAX 1024 36 37 #define BTRFS_DEVICE_SPEC_BY_ID (1ULL << 3) 38 39 #define BTRFS_VOL_ARG_V2_FLAGS_SUPPORTED \ 40 (BTRFS_SUBVOL_CREATE_ASYNC | \ 41 BTRFS_SUBVOL_RDONLY | \ 42 BTRFS_SUBVOL_QGROUP_INHERIT | \ 43 BTRFS_DEVICE_SPEC_BY_ID) 44 45 #define BTRFS_FSID_SIZE 16 46 #define BTRFS_UUID_SIZE 16 47 #define BTRFS_UUID_UNPARSED_SIZE 37 48 49 /* 50 * flags definition for qgroup limits 51 * 52 * Used by: 53 * struct btrfs_qgroup_limit.flags 54 * struct btrfs_qgroup_limit_item.flags 55 */ 56 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0) 57 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1) 58 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2) 59 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3) 60 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4) 61 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5) 62 63 struct btrfs_qgroup_limit { 64 __u64 flags; 65 __u64 max_rfer; 66 __u64 max_excl; 67 __u64 rsv_rfer; 68 __u64 rsv_excl; 69 }; 70 71 /* 72 * flags definition for qgroup inheritance 73 * 74 * Used by: 75 * struct btrfs_qgroup_inherit.flags 76 */ 77 #define BTRFS_QGROUP_INHERIT_SET_LIMITS (1ULL << 0) 78 79 struct btrfs_qgroup_inherit { 80 __u64 flags; 81 __u64 num_qgroups; 82 __u64 num_ref_copies; 83 __u64 num_excl_copies; 84 struct btrfs_qgroup_limit lim; 85 __u64 qgroups[0]; 86 }; 87 88 struct btrfs_ioctl_qgroup_limit_args { 89 __u64 qgroupid; 90 struct btrfs_qgroup_limit lim; 91 }; 92 93 /* 94 * flags for subvolumes 95 * 96 * Used by: 97 * struct btrfs_ioctl_vol_args_v2.flags 98 * 99 * BTRFS_SUBVOL_RDONLY is also provided/consumed by the following ioctls: 100 * - BTRFS_IOC_SUBVOL_GETFLAGS 101 * - BTRFS_IOC_SUBVOL_SETFLAGS 102 */ 103 #define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0) 104 #define BTRFS_SUBVOL_RDONLY (1ULL << 1) 105 #define BTRFS_SUBVOL_QGROUP_INHERIT (1ULL << 2) 106 107 #define BTRFS_SUBVOL_NAME_MAX 4039 108 struct btrfs_ioctl_vol_args_v2 { 109 __s64 fd; 110 __u64 transid; 111 __u64 flags; 112 union { 113 struct { 114 __u64 size; 115 struct btrfs_qgroup_inherit __user *qgroup_inherit; 116 }; 117 __u64 unused[4]; 118 }; 119 union { 120 char name[BTRFS_SUBVOL_NAME_MAX + 1]; 121 __u64 devid; 122 }; 123 }; 124 125 /* 126 * structure to report errors and progress to userspace, either as a 127 * result of a finished scrub, a canceled scrub or a progress inquiry 128 */ 129 struct btrfs_scrub_progress { 130 __u64 data_extents_scrubbed; /* # of data extents scrubbed */ 131 __u64 tree_extents_scrubbed; /* # of tree extents scrubbed */ 132 __u64 data_bytes_scrubbed; /* # of data bytes scrubbed */ 133 __u64 tree_bytes_scrubbed; /* # of tree bytes scrubbed */ 134 __u64 read_errors; /* # of read errors encountered (EIO) */ 135 __u64 csum_errors; /* # of failed csum checks */ 136 __u64 verify_errors; /* # of occurences, where the metadata 137 * of a tree block did not match the 138 * expected values, like generation or 139 * logical */ 140 __u64 no_csum; /* # of 4k data block for which no csum 141 * is present, probably the result of 142 * data written with nodatasum */ 143 __u64 csum_discards; /* # of csum for which no data was found 144 * in the extent tree. */ 145 __u64 super_errors; /* # of bad super blocks encountered */ 146 __u64 malloc_errors; /* # of internal kmalloc errors. These 147 * will likely cause an incomplete 148 * scrub */ 149 __u64 uncorrectable_errors; /* # of errors where either no intact 150 * copy was found or the writeback 151 * failed */ 152 __u64 corrected_errors; /* # of errors corrected */ 153 __u64 last_physical; /* last physical address scrubbed. In 154 * case a scrub was aborted, this can 155 * be used to restart the scrub */ 156 __u64 unverified_errors; /* # of occurences where a read for a 157 * full (64k) bio failed, but the re- 158 * check succeeded for each 4k piece. 159 * Intermittent error. */ 160 }; 161 162 #define BTRFS_SCRUB_READONLY 1 163 struct btrfs_ioctl_scrub_args { 164 __u64 devid; /* in */ 165 __u64 start; /* in */ 166 __u64 end; /* in */ 167 __u64 flags; /* in */ 168 struct btrfs_scrub_progress progress; /* out */ 169 /* pad to 1k */ 170 __u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8]; 171 }; 172 173 #define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0 174 #define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID 1 175 struct btrfs_ioctl_dev_replace_start_params { 176 __u64 srcdevid; /* in, if 0, use srcdev_name instead */ 177 __u64 cont_reading_from_srcdev_mode; /* in, see #define 178 * above */ 179 __u8 srcdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */ 180 __u8 tgtdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */ 181 }; 182 183 #define BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED 0 184 #define BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED 1 185 #define BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED 2 186 #define BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED 3 187 #define BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED 4 188 struct btrfs_ioctl_dev_replace_status_params { 189 __u64 replace_state; /* out, see #define above */ 190 __u64 progress_1000; /* out, 0 <= x <= 1000 */ 191 __u64 time_started; /* out, seconds since 1-Jan-1970 */ 192 __u64 time_stopped; /* out, seconds since 1-Jan-1970 */ 193 __u64 num_write_errors; /* out */ 194 __u64 num_uncorrectable_read_errors; /* out */ 195 }; 196 197 #define BTRFS_IOCTL_DEV_REPLACE_CMD_START 0 198 #define BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS 1 199 #define BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL 2 200 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR 0 201 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED 1 202 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_ALREADY_STARTED 2 203 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_SCRUB_INPROGRESS 3 204 struct btrfs_ioctl_dev_replace_args { 205 __u64 cmd; /* in */ 206 __u64 result; /* out */ 207 208 union { 209 struct btrfs_ioctl_dev_replace_start_params start; 210 struct btrfs_ioctl_dev_replace_status_params status; 211 }; /* in/out */ 212 213 __u64 spare[64]; 214 }; 215 216 struct btrfs_ioctl_dev_info_args { 217 __u64 devid; /* in/out */ 218 __u8 uuid[BTRFS_UUID_SIZE]; /* in/out */ 219 __u64 bytes_used; /* out */ 220 __u64 total_bytes; /* out */ 221 __u64 unused[379]; /* pad to 4k */ 222 __u8 path[BTRFS_DEVICE_PATH_NAME_MAX]; /* out */ 223 }; 224 225 struct btrfs_ioctl_fs_info_args { 226 __u64 max_id; /* out */ 227 __u64 num_devices; /* out */ 228 __u8 fsid[BTRFS_FSID_SIZE]; /* out */ 229 __u32 nodesize; /* out */ 230 __u32 sectorsize; /* out */ 231 __u32 clone_alignment; /* out */ 232 __u32 reserved32; 233 __u64 reserved[122]; /* pad to 1k */ 234 }; 235 236 /* 237 * feature flags 238 * 239 * Used by: 240 * struct btrfs_ioctl_feature_flags 241 */ 242 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0) 243 /* 244 * Older kernels (< 4.9) on big-endian systems produced broken free space tree 245 * bitmaps, and btrfs-progs also used to corrupt the free space tree (versions 246 * < 4.7.3). If this bit is clear, then the free space tree cannot be trusted. 247 * btrfs-progs can also intentionally clear this bit to ask the kernel to 248 * rebuild the free space tree, however this might not work on older kernels 249 * that do not know about this bit. If not sure, clear the cache manually on 250 * first mount when booting older kernel versions. 251 */ 252 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1) 253 254 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) 255 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1) 256 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2) 257 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3) 258 /* 259 * some patches floated around with a second compression method 260 * lets save that incompat here for when they do get in 261 * Note we don't actually support it, we're just reserving the 262 * number 263 */ 264 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4) 265 266 /* 267 * older kernels tried to do bigger metadata blocks, but the 268 * code was pretty buggy. Lets not let them try anymore. 269 */ 270 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5) 271 272 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6) 273 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7) 274 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8) 275 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9) 276 277 struct btrfs_ioctl_feature_flags { 278 __u64 compat_flags; 279 __u64 compat_ro_flags; 280 __u64 incompat_flags; 281 }; 282 283 /* balance control ioctl modes */ 284 #define BTRFS_BALANCE_CTL_PAUSE 1 285 #define BTRFS_BALANCE_CTL_CANCEL 2 286 287 /* 288 * this is packed, because it should be exactly the same as its disk 289 * byte order counterpart (struct btrfs_disk_balance_args) 290 */ 291 struct btrfs_balance_args { 292 __u64 profiles; 293 union { 294 __le64 usage; 295 struct { 296 __le32 usage_min; 297 __le32 usage_max; 298 }; 299 }; 300 __u64 devid; 301 __u64 pstart; 302 __u64 pend; 303 __u64 vstart; 304 __u64 vend; 305 306 __u64 target; 307 308 __u64 flags; 309 310 /* 311 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit' 312 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum 313 * and maximum 314 */ 315 union { 316 __u64 limit; /* limit number of processed chunks */ 317 struct { 318 __u32 limit_min; 319 __u32 limit_max; 320 }; 321 }; 322 323 /* 324 * Process chunks that cross stripes_min..stripes_max devices, 325 * BTRFS_BALANCE_ARGS_STRIPES_RANGE 326 */ 327 __le32 stripes_min; 328 __le32 stripes_max; 329 330 __u64 unused[6]; 331 } __attribute__ ((__packed__)); 332 333 /* report balance progress to userspace */ 334 struct btrfs_balance_progress { 335 __u64 expected; /* estimated # of chunks that will be 336 * relocated to fulfill the request */ 337 __u64 considered; /* # of chunks we have considered so far */ 338 __u64 completed; /* # of chunks relocated so far */ 339 }; 340 341 /* 342 * flags definition for balance 343 * 344 * Restriper's general type filter 345 * 346 * Used by: 347 * btrfs_ioctl_balance_args.flags 348 * btrfs_balance_control.flags (internal) 349 */ 350 #define BTRFS_BALANCE_DATA (1ULL << 0) 351 #define BTRFS_BALANCE_SYSTEM (1ULL << 1) 352 #define BTRFS_BALANCE_METADATA (1ULL << 2) 353 354 #define BTRFS_BALANCE_TYPE_MASK (BTRFS_BALANCE_DATA | \ 355 BTRFS_BALANCE_SYSTEM | \ 356 BTRFS_BALANCE_METADATA) 357 358 #define BTRFS_BALANCE_FORCE (1ULL << 3) 359 #define BTRFS_BALANCE_RESUME (1ULL << 4) 360 361 /* 362 * flags definitions for per-type balance args 363 * 364 * Balance filters 365 * 366 * Used by: 367 * struct btrfs_balance_args 368 */ 369 #define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0) 370 #define BTRFS_BALANCE_ARGS_USAGE (1ULL << 1) 371 #define BTRFS_BALANCE_ARGS_DEVID (1ULL << 2) 372 #define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3) 373 #define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4) 374 #define BTRFS_BALANCE_ARGS_LIMIT (1ULL << 5) 375 #define BTRFS_BALANCE_ARGS_LIMIT_RANGE (1ULL << 6) 376 #define BTRFS_BALANCE_ARGS_STRIPES_RANGE (1ULL << 7) 377 #define BTRFS_BALANCE_ARGS_USAGE_RANGE (1ULL << 10) 378 379 #define BTRFS_BALANCE_ARGS_MASK \ 380 (BTRFS_BALANCE_ARGS_PROFILES | \ 381 BTRFS_BALANCE_ARGS_USAGE | \ 382 BTRFS_BALANCE_ARGS_DEVID | \ 383 BTRFS_BALANCE_ARGS_DRANGE | \ 384 BTRFS_BALANCE_ARGS_VRANGE | \ 385 BTRFS_BALANCE_ARGS_LIMIT | \ 386 BTRFS_BALANCE_ARGS_LIMIT_RANGE | \ 387 BTRFS_BALANCE_ARGS_STRIPES_RANGE | \ 388 BTRFS_BALANCE_ARGS_USAGE_RANGE) 389 390 /* 391 * Profile changing flags. When SOFT is set we won't relocate chunk if 392 * it already has the target profile (even though it may be 393 * half-filled). 394 */ 395 #define BTRFS_BALANCE_ARGS_CONVERT (1ULL << 8) 396 #define BTRFS_BALANCE_ARGS_SOFT (1ULL << 9) 397 398 399 /* 400 * flags definition for balance state 401 * 402 * Used by: 403 * struct btrfs_ioctl_balance_args.state 404 */ 405 #define BTRFS_BALANCE_STATE_RUNNING (1ULL << 0) 406 #define BTRFS_BALANCE_STATE_PAUSE_REQ (1ULL << 1) 407 #define BTRFS_BALANCE_STATE_CANCEL_REQ (1ULL << 2) 408 409 struct btrfs_ioctl_balance_args { 410 __u64 flags; /* in/out */ 411 __u64 state; /* out */ 412 413 struct btrfs_balance_args data; /* in/out */ 414 struct btrfs_balance_args meta; /* in/out */ 415 struct btrfs_balance_args sys; /* in/out */ 416 417 struct btrfs_balance_progress stat; /* out */ 418 419 __u64 unused[72]; /* pad to 1k */ 420 }; 421 422 #define BTRFS_INO_LOOKUP_PATH_MAX 4080 423 struct btrfs_ioctl_ino_lookup_args { 424 __u64 treeid; 425 __u64 objectid; 426 char name[BTRFS_INO_LOOKUP_PATH_MAX]; 427 }; 428 429 struct btrfs_ioctl_search_key { 430 /* which root are we searching. 0 is the tree of tree roots */ 431 __u64 tree_id; 432 433 /* keys returned will be >= min and <= max */ 434 __u64 min_objectid; 435 __u64 max_objectid; 436 437 /* keys returned will be >= min and <= max */ 438 __u64 min_offset; 439 __u64 max_offset; 440 441 /* max and min transids to search for */ 442 __u64 min_transid; 443 __u64 max_transid; 444 445 /* keys returned will be >= min and <= max */ 446 __u32 min_type; 447 __u32 max_type; 448 449 /* 450 * how many items did userland ask for, and how many are we 451 * returning 452 */ 453 __u32 nr_items; 454 455 /* align to 64 bits */ 456 __u32 unused; 457 458 /* some extra for later */ 459 __u64 unused1; 460 __u64 unused2; 461 __u64 unused3; 462 __u64 unused4; 463 }; 464 465 struct btrfs_ioctl_search_header { 466 __u64 transid; 467 __u64 objectid; 468 __u64 offset; 469 __u32 type; 470 __u32 len; 471 }; 472 473 #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key)) 474 /* 475 * the buf is an array of search headers where 476 * each header is followed by the actual item 477 * the type field is expanded to 32 bits for alignment 478 */ 479 struct btrfs_ioctl_search_args { 480 struct btrfs_ioctl_search_key key; 481 char buf[BTRFS_SEARCH_ARGS_BUFSIZE]; 482 }; 483 484 struct btrfs_ioctl_search_args_v2 { 485 struct btrfs_ioctl_search_key key; /* in/out - search parameters */ 486 __u64 buf_size; /* in - size of buffer 487 * out - on EOVERFLOW: needed size 488 * to store item */ 489 __u64 buf[0]; /* out - found items */ 490 }; 491 492 struct btrfs_ioctl_clone_range_args { 493 __s64 src_fd; 494 __u64 src_offset, src_length; 495 __u64 dest_offset; 496 }; 497 498 /* 499 * flags definition for the defrag range ioctl 500 * 501 * Used by: 502 * struct btrfs_ioctl_defrag_range_args.flags 503 */ 504 #define BTRFS_DEFRAG_RANGE_COMPRESS 1 505 #define BTRFS_DEFRAG_RANGE_START_IO 2 506 struct btrfs_ioctl_defrag_range_args { 507 /* start of the defrag operation */ 508 __u64 start; 509 510 /* number of bytes to defrag, use (u64)-1 to say all */ 511 __u64 len; 512 513 /* 514 * flags for the operation, which can include turning 515 * on compression for this one defrag 516 */ 517 __u64 flags; 518 519 /* 520 * any extent bigger than this will be considered 521 * already defragged. Use 0 to take the kernel default 522 * Use 1 to say every single extent must be rewritten 523 */ 524 __u32 extent_thresh; 525 526 /* 527 * which compression method to use if turning on compression 528 * for this defrag operation. If unspecified, zlib will 529 * be used 530 */ 531 __u32 compress_type; 532 533 /* spare for later */ 534 __u32 unused[4]; 535 }; 536 537 538 #define BTRFS_SAME_DATA_DIFFERS 1 539 /* For extent-same ioctl */ 540 struct btrfs_ioctl_same_extent_info { 541 __s64 fd; /* in - destination file */ 542 __u64 logical_offset; /* in - start of extent in destination */ 543 __u64 bytes_deduped; /* out - total # of bytes we were able 544 * to dedupe from this file */ 545 /* status of this dedupe operation: 546 * 0 if dedup succeeds 547 * < 0 for error 548 * == BTRFS_SAME_DATA_DIFFERS if data differs 549 */ 550 __s32 status; /* out - see above description */ 551 __u32 reserved; 552 }; 553 554 struct btrfs_ioctl_same_args { 555 __u64 logical_offset; /* in - start of extent in source */ 556 __u64 length; /* in - length of extent */ 557 __u16 dest_count; /* in - total elements in info array */ 558 __u16 reserved1; 559 __u32 reserved2; 560 struct btrfs_ioctl_same_extent_info info[0]; 561 }; 562 563 struct btrfs_ioctl_space_info { 564 __u64 flags; 565 __u64 total_bytes; 566 __u64 used_bytes; 567 }; 568 569 struct btrfs_ioctl_space_args { 570 __u64 space_slots; 571 __u64 total_spaces; 572 struct btrfs_ioctl_space_info spaces[0]; 573 }; 574 575 struct btrfs_data_container { 576 __u32 bytes_left; /* out -- bytes not needed to deliver output */ 577 __u32 bytes_missing; /* out -- additional bytes needed for result */ 578 __u32 elem_cnt; /* out */ 579 __u32 elem_missed; /* out */ 580 __u64 val[0]; /* out */ 581 }; 582 583 struct btrfs_ioctl_ino_path_args { 584 __u64 inum; /* in */ 585 __u64 size; /* in */ 586 __u64 reserved[4]; 587 /* struct btrfs_data_container *fspath; out */ 588 __u64 fspath; /* out */ 589 }; 590 591 struct btrfs_ioctl_logical_ino_args { 592 __u64 logical; /* in */ 593 __u64 size; /* in */ 594 __u64 reserved[4]; 595 /* struct btrfs_data_container *inodes; out */ 596 __u64 inodes; 597 }; 598 599 enum btrfs_dev_stat_values { 600 /* disk I/O failure stats */ 601 BTRFS_DEV_STAT_WRITE_ERRS, /* EIO or EREMOTEIO from lower layers */ 602 BTRFS_DEV_STAT_READ_ERRS, /* EIO or EREMOTEIO from lower layers */ 603 BTRFS_DEV_STAT_FLUSH_ERRS, /* EIO or EREMOTEIO from lower layers */ 604 605 /* stats for indirect indications for I/O failures */ 606 BTRFS_DEV_STAT_CORRUPTION_ERRS, /* checksum error, bytenr error or 607 * contents is illegal: this is an 608 * indication that the block was damaged 609 * during read or write, or written to 610 * wrong location or read from wrong 611 * location */ 612 BTRFS_DEV_STAT_GENERATION_ERRS, /* an indication that blocks have not 613 * been written */ 614 615 BTRFS_DEV_STAT_VALUES_MAX 616 }; 617 618 /* Reset statistics after reading; needs SYS_ADMIN capability */ 619 #define BTRFS_DEV_STATS_RESET (1ULL << 0) 620 621 struct btrfs_ioctl_get_dev_stats { 622 __u64 devid; /* in */ 623 __u64 nr_items; /* in/out */ 624 __u64 flags; /* in/out */ 625 626 /* out values: */ 627 __u64 values[BTRFS_DEV_STAT_VALUES_MAX]; 628 629 __u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX]; /* pad to 1k */ 630 }; 631 632 #define BTRFS_QUOTA_CTL_ENABLE 1 633 #define BTRFS_QUOTA_CTL_DISABLE 2 634 #define BTRFS_QUOTA_CTL_RESCAN__NOTUSED 3 635 struct btrfs_ioctl_quota_ctl_args { 636 __u64 cmd; 637 __u64 status; 638 }; 639 640 struct btrfs_ioctl_quota_rescan_args { 641 __u64 flags; 642 __u64 progress; 643 __u64 reserved[6]; 644 }; 645 646 struct btrfs_ioctl_qgroup_assign_args { 647 __u64 assign; 648 __u64 src; 649 __u64 dst; 650 }; 651 652 struct btrfs_ioctl_qgroup_create_args { 653 __u64 create; 654 __u64 qgroupid; 655 }; 656 struct btrfs_ioctl_timespec { 657 __u64 sec; 658 __u32 nsec; 659 }; 660 661 struct btrfs_ioctl_received_subvol_args { 662 char uuid[BTRFS_UUID_SIZE]; /* in */ 663 __u64 stransid; /* in */ 664 __u64 rtransid; /* out */ 665 struct btrfs_ioctl_timespec stime; /* in */ 666 struct btrfs_ioctl_timespec rtime; /* out */ 667 __u64 flags; /* in */ 668 __u64 reserved[16]; /* in */ 669 }; 670 671 /* 672 * Caller doesn't want file data in the send stream, even if the 673 * search of clone sources doesn't find an extent. UPDATE_EXTENT 674 * commands will be sent instead of WRITE commands. 675 */ 676 #define BTRFS_SEND_FLAG_NO_FILE_DATA 0x1 677 678 /* 679 * Do not add the leading stream header. Used when multiple snapshots 680 * are sent back to back. 681 */ 682 #define BTRFS_SEND_FLAG_OMIT_STREAM_HEADER 0x2 683 684 /* 685 * Omit the command at the end of the stream that indicated the end 686 * of the stream. This option is used when multiple snapshots are 687 * sent back to back. 688 */ 689 #define BTRFS_SEND_FLAG_OMIT_END_CMD 0x4 690 691 #define BTRFS_SEND_FLAG_MASK \ 692 (BTRFS_SEND_FLAG_NO_FILE_DATA | \ 693 BTRFS_SEND_FLAG_OMIT_STREAM_HEADER | \ 694 BTRFS_SEND_FLAG_OMIT_END_CMD) 695 696 struct btrfs_ioctl_send_args { 697 __s64 send_fd; /* in */ 698 __u64 clone_sources_count; /* in */ 699 __u64 __user *clone_sources; /* in */ 700 __u64 parent_root; /* in */ 701 __u64 flags; /* in */ 702 __u64 reserved[4]; /* in */ 703 }; 704 705 /* Error codes as returned by the kernel */ 706 enum btrfs_err_code { 707 BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET = 1, 708 BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET, 709 BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET, 710 BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET, 711 BTRFS_ERROR_DEV_TGT_REPLACE, 712 BTRFS_ERROR_DEV_MISSING_NOT_FOUND, 713 BTRFS_ERROR_DEV_ONLY_WRITABLE, 714 BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS 715 }; 716 /* An error code to error string mapping for the kernel 717 * error codes 718 */ 719 static inline char *btrfs_err_str(enum btrfs_err_code err_code) 720 { 721 switch (err_code) { 722 case BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET: 723 return "unable to go below two devices on raid1"; 724 case BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET: 725 return "unable to go below four devices on raid10"; 726 case BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET: 727 return "unable to go below two devices on raid5"; 728 case BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET: 729 return "unable to go below three devices on raid6"; 730 case BTRFS_ERROR_DEV_TGT_REPLACE: 731 return "unable to remove the dev_replace target dev"; 732 case BTRFS_ERROR_DEV_MISSING_NOT_FOUND: 733 return "no missing devices found to remove"; 734 case BTRFS_ERROR_DEV_ONLY_WRITABLE: 735 return "unable to remove the only writeable device"; 736 case BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS: 737 return "add/delete/balance/replace/resize operation "\ 738 "in progress"; 739 default: 740 return NULL; 741 } 742 } 743 744 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \ 745 struct btrfs_ioctl_vol_args) 746 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \ 747 struct btrfs_ioctl_vol_args) 748 #define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \ 749 struct btrfs_ioctl_vol_args) 750 #define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \ 751 struct btrfs_ioctl_vol_args) 752 /* trans start and trans end are dangerous, and only for 753 * use by applications that know how to avoid the 754 * resulting deadlocks 755 */ 756 #define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6) 757 #define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7) 758 #define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8) 759 760 #define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int) 761 #define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \ 762 struct btrfs_ioctl_vol_args) 763 #define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \ 764 struct btrfs_ioctl_vol_args) 765 #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \ 766 struct btrfs_ioctl_vol_args) 767 768 #define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \ 769 struct btrfs_ioctl_clone_range_args) 770 771 #define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \ 772 struct btrfs_ioctl_vol_args) 773 #define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \ 774 struct btrfs_ioctl_vol_args) 775 #define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \ 776 struct btrfs_ioctl_defrag_range_args) 777 #define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \ 778 struct btrfs_ioctl_search_args) 779 #define BTRFS_IOC_TREE_SEARCH_V2 _IOWR(BTRFS_IOCTL_MAGIC, 17, \ 780 struct btrfs_ioctl_search_args_v2) 781 #define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \ 782 struct btrfs_ioctl_ino_lookup_args) 783 #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, __u64) 784 #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \ 785 struct btrfs_ioctl_space_args) 786 #define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64) 787 #define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64) 788 #define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \ 789 struct btrfs_ioctl_vol_args_v2) 790 #define BTRFS_IOC_SUBVOL_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 24, \ 791 struct btrfs_ioctl_vol_args_v2) 792 #define BTRFS_IOC_SUBVOL_GETFLAGS _IOR(BTRFS_IOCTL_MAGIC, 25, __u64) 793 #define BTRFS_IOC_SUBVOL_SETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 26, __u64) 794 #define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \ 795 struct btrfs_ioctl_scrub_args) 796 #define BTRFS_IOC_SCRUB_CANCEL _IO(BTRFS_IOCTL_MAGIC, 28) 797 #define BTRFS_IOC_SCRUB_PROGRESS _IOWR(BTRFS_IOCTL_MAGIC, 29, \ 798 struct btrfs_ioctl_scrub_args) 799 #define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \ 800 struct btrfs_ioctl_dev_info_args) 801 #define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \ 802 struct btrfs_ioctl_fs_info_args) 803 #define BTRFS_IOC_BALANCE_V2 _IOWR(BTRFS_IOCTL_MAGIC, 32, \ 804 struct btrfs_ioctl_balance_args) 805 #define BTRFS_IOC_BALANCE_CTL _IOW(BTRFS_IOCTL_MAGIC, 33, int) 806 #define BTRFS_IOC_BALANCE_PROGRESS _IOR(BTRFS_IOCTL_MAGIC, 34, \ 807 struct btrfs_ioctl_balance_args) 808 #define BTRFS_IOC_INO_PATHS _IOWR(BTRFS_IOCTL_MAGIC, 35, \ 809 struct btrfs_ioctl_ino_path_args) 810 #define BTRFS_IOC_LOGICAL_INO _IOWR(BTRFS_IOCTL_MAGIC, 36, \ 811 struct btrfs_ioctl_logical_ino_args) 812 #define BTRFS_IOC_SET_RECEIVED_SUBVOL _IOWR(BTRFS_IOCTL_MAGIC, 37, \ 813 struct btrfs_ioctl_received_subvol_args) 814 #define BTRFS_IOC_SEND _IOW(BTRFS_IOCTL_MAGIC, 38, struct btrfs_ioctl_send_args) 815 #define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \ 816 struct btrfs_ioctl_vol_args) 817 #define BTRFS_IOC_QUOTA_CTL _IOWR(BTRFS_IOCTL_MAGIC, 40, \ 818 struct btrfs_ioctl_quota_ctl_args) 819 #define BTRFS_IOC_QGROUP_ASSIGN _IOW(BTRFS_IOCTL_MAGIC, 41, \ 820 struct btrfs_ioctl_qgroup_assign_args) 821 #define BTRFS_IOC_QGROUP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 42, \ 822 struct btrfs_ioctl_qgroup_create_args) 823 #define BTRFS_IOC_QGROUP_LIMIT _IOR(BTRFS_IOCTL_MAGIC, 43, \ 824 struct btrfs_ioctl_qgroup_limit_args) 825 #define BTRFS_IOC_QUOTA_RESCAN _IOW(BTRFS_IOCTL_MAGIC, 44, \ 826 struct btrfs_ioctl_quota_rescan_args) 827 #define BTRFS_IOC_QUOTA_RESCAN_STATUS _IOR(BTRFS_IOCTL_MAGIC, 45, \ 828 struct btrfs_ioctl_quota_rescan_args) 829 #define BTRFS_IOC_QUOTA_RESCAN_WAIT _IO(BTRFS_IOCTL_MAGIC, 46) 830 #define BTRFS_IOC_GET_FSLABEL _IOR(BTRFS_IOCTL_MAGIC, 49, \ 831 char[BTRFS_LABEL_SIZE]) 832 #define BTRFS_IOC_SET_FSLABEL _IOW(BTRFS_IOCTL_MAGIC, 50, \ 833 char[BTRFS_LABEL_SIZE]) 834 #define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \ 835 struct btrfs_ioctl_get_dev_stats) 836 #define BTRFS_IOC_DEV_REPLACE _IOWR(BTRFS_IOCTL_MAGIC, 53, \ 837 struct btrfs_ioctl_dev_replace_args) 838 #define BTRFS_IOC_FILE_EXTENT_SAME _IOWR(BTRFS_IOCTL_MAGIC, 54, \ 839 struct btrfs_ioctl_same_args) 840 #define BTRFS_IOC_GET_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \ 841 struct btrfs_ioctl_feature_flags) 842 #define BTRFS_IOC_SET_FEATURES _IOW(BTRFS_IOCTL_MAGIC, 57, \ 843 struct btrfs_ioctl_feature_flags[2]) 844 #define BTRFS_IOC_GET_SUPPORTED_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \ 845 struct btrfs_ioctl_feature_flags[3]) 846 #define BTRFS_IOC_RM_DEV_V2 _IOW(BTRFS_IOCTL_MAGIC, 58, \ 847 struct btrfs_ioctl_vol_args_v2) 848 849 #endif /* _UAPI_LINUX_BTRFS_H */ 850