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 */
btrfs_err_str(enum btrfs_err_code err_code)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