1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * Copyright (C) 2007 Oracle. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public
7 * License v2 as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public
15 * License along with this program; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 021110-1307, USA.
18 */
19
20#ifndef _UAPI_LINUX_BTRFS_H
21#define _UAPI_LINUX_BTRFS_H
22
23#ifdef __cplusplus
24extern "C" {
25#endif
26
27#include <linux/types.h>
28#include <linux/ioctl.h>
29#include <linux/fs.h>
30
31#define BTRFS_IOCTL_MAGIC 0x94
32#define BTRFS_VOL_NAME_MAX 255
33#define BTRFS_LABEL_SIZE 256
34
35/* this should be 4k */
36#define BTRFS_PATH_NAME_MAX 4087
37struct btrfs_ioctl_vol_args {
38 __s64 fd;
39 char name[BTRFS_PATH_NAME_MAX + 1];
40};
41
42#define BTRFS_DEVICE_PATH_NAME_MAX 1024
43#define BTRFS_SUBVOL_NAME_MAX 4039
44
45#ifndef __KERNEL__
46/* Deprecated since 5.7 */
47# define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)
48#endif
49#define BTRFS_SUBVOL_RDONLY (1ULL << 1)
50#define BTRFS_SUBVOL_QGROUP_INHERIT (1ULL << 2)
51
52#define BTRFS_DEVICE_SPEC_BY_ID (1ULL << 3)
53
54#define BTRFS_SUBVOL_SPEC_BY_ID (1ULL << 4)
55
56#define BTRFS_VOL_ARG_V2_FLAGS_SUPPORTED \
57 (BTRFS_SUBVOL_RDONLY | \
58 BTRFS_SUBVOL_QGROUP_INHERIT | \
59 BTRFS_DEVICE_SPEC_BY_ID | \
60 BTRFS_SUBVOL_SPEC_BY_ID)
61
62#define BTRFS_FSID_SIZE 16
63#define BTRFS_UUID_SIZE 16
64#define BTRFS_UUID_UNPARSED_SIZE 37
65
66/*
67 * flags definition for qgroup limits
68 *
69 * Used by:
70 * struct btrfs_qgroup_limit.flags
71 * struct btrfs_qgroup_limit_item.flags
72 */
73#define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
74#define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
75#define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
76#define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
77#define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
78#define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
79
80struct btrfs_qgroup_limit {
81 __u64 flags;
82 __u64 max_rfer;
83 __u64 max_excl;
84 __u64 rsv_rfer;
85 __u64 rsv_excl;
86};
87
88/*
89 * flags definition for qgroup inheritance
90 *
91 * Used by:
92 * struct btrfs_qgroup_inherit.flags
93 */
94#define BTRFS_QGROUP_INHERIT_SET_LIMITS (1ULL << 0)
95
96struct btrfs_qgroup_inherit {
97 __u64 flags;
98 __u64 num_qgroups;
99 __u64 num_ref_copies;
100 __u64 num_excl_copies;
101 struct btrfs_qgroup_limit lim;
102 __u64 qgroups[];
103};
104
105struct btrfs_ioctl_qgroup_limit_args {
106 __u64 qgroupid;
107 struct btrfs_qgroup_limit lim;
108};
109
110/*
111 * Arguments for specification of subvolumes or devices, supporting by-name or
112 * by-id and flags
113 *
114 * The set of supported flags depends on the ioctl
115 *
116 * BTRFS_SUBVOL_RDONLY is also provided/consumed by the following ioctls:
117 * - BTRFS_IOC_SUBVOL_GETFLAGS
118 * - BTRFS_IOC_SUBVOL_SETFLAGS
119 */
120
121/* Supported flags for BTRFS_IOC_RM_DEV_V2 */
122#define BTRFS_DEVICE_REMOVE_ARGS_MASK \
123 (BTRFS_DEVICE_SPEC_BY_ID)
124
125/* Supported flags for BTRFS_IOC_SNAP_CREATE_V2 and BTRFS_IOC_SUBVOL_CREATE_V2 */
126#define BTRFS_SUBVOL_CREATE_ARGS_MASK \
127 (BTRFS_SUBVOL_RDONLY | \
128 BTRFS_SUBVOL_QGROUP_INHERIT)
129
130/* Supported flags for BTRFS_IOC_SNAP_DESTROY_V2 */
131#define BTRFS_SUBVOL_DELETE_ARGS_MASK \
132 (BTRFS_SUBVOL_SPEC_BY_ID)
133
134struct btrfs_ioctl_vol_args_v2 {
135 __s64 fd;
136 __u64 transid;
137 __u64 flags;
138 union {
139 struct {
140 __u64 size;
141 struct btrfs_qgroup_inherit __user *qgroup_inherit;
142 };
143 __u64 unused[4];
144 };
145 union {
146 char name[BTRFS_SUBVOL_NAME_MAX + 1];
147 __u64 devid;
148 __u64 subvolid;
149 };
150};
151
152/*
153 * structure to report errors and progress to userspace, either as a
154 * result of a finished scrub, a canceled scrub or a progress inquiry
155 */
156struct btrfs_scrub_progress {
157 __u64 data_extents_scrubbed; /* # of data extents scrubbed */
158 __u64 tree_extents_scrubbed; /* # of tree extents scrubbed */
159 __u64 data_bytes_scrubbed; /* # of data bytes scrubbed */
160 __u64 tree_bytes_scrubbed; /* # of tree bytes scrubbed */
161 __u64 read_errors; /* # of read errors encountered (EIO) */
162 __u64 csum_errors; /* # of failed csum checks */
163 __u64 verify_errors; /* # of occurrences, where the metadata
164 * of a tree block did not match the
165 * expected values, like generation or
166 * logical */
167 __u64 no_csum; /* # of 4k data block for which no csum
168 * is present, probably the result of
169 * data written with nodatasum */
170 __u64 csum_discards; /* # of csum for which no data was found
171 * in the extent tree. */
172 __u64 super_errors; /* # of bad super blocks encountered */
173 __u64 malloc_errors; /* # of internal kmalloc errors. These
174 * will likely cause an incomplete
175 * scrub */
176 __u64 uncorrectable_errors; /* # of errors where either no intact
177 * copy was found or the writeback
178 * failed */
179 __u64 corrected_errors; /* # of errors corrected */
180 __u64 last_physical; /* last physical address scrubbed. In
181 * case a scrub was aborted, this can
182 * be used to restart the scrub */
183 __u64 unverified_errors; /* # of occurrences where a read for a
184 * full (64k) bio failed, but the re-
185 * check succeeded for each 4k piece.
186 * Intermittent error. */
187};
188
189#define BTRFS_SCRUB_READONLY 1
190#define BTRFS_SCRUB_SUPPORTED_FLAGS (BTRFS_SCRUB_READONLY)
191struct btrfs_ioctl_scrub_args {
192 __u64 devid; /* in */
193 __u64 start; /* in */
194 __u64 end; /* in */
195 __u64 flags; /* in */
196 struct btrfs_scrub_progress progress; /* out */
197 /* pad to 1k */
198 __u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8];
199};
200
201#define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
202#define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
203struct btrfs_ioctl_dev_replace_start_params {
204 __u64 srcdevid; /* in, if 0, use srcdev_name instead */
205 __u64 cont_reading_from_srcdev_mode; /* in, see #define
206 * above */
207 __u8 srcdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */
208 __u8 tgtdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */
209};
210
211#define BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED 0
212#define BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED 1
213#define BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED 2
214#define BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED 3
215#define BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED 4
216struct btrfs_ioctl_dev_replace_status_params {
217 __u64 replace_state; /* out, see #define above */
218 __u64 progress_1000; /* out, 0 <= x <= 1000 */
219 __u64 time_started; /* out, seconds since 1-Jan-1970 */
220 __u64 time_stopped; /* out, seconds since 1-Jan-1970 */
221 __u64 num_write_errors; /* out */
222 __u64 num_uncorrectable_read_errors; /* out */
223};
224
225#define BTRFS_IOCTL_DEV_REPLACE_CMD_START 0
226#define BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS 1
227#define BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL 2
228#define BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR 0
229#define BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED 1
230#define BTRFS_IOCTL_DEV_REPLACE_RESULT_ALREADY_STARTED 2
231#define BTRFS_IOCTL_DEV_REPLACE_RESULT_SCRUB_INPROGRESS 3
232struct btrfs_ioctl_dev_replace_args {
233 __u64 cmd; /* in */
234 __u64 result; /* out */
235
236 union {
237 struct btrfs_ioctl_dev_replace_start_params start;
238 struct btrfs_ioctl_dev_replace_status_params status;
239 }; /* in/out */
240
241 __u64 spare[64];
242};
243
244struct btrfs_ioctl_dev_info_args {
245 __u64 devid; /* in/out */
246 __u8 uuid[BTRFS_UUID_SIZE]; /* in/out */
247 __u64 bytes_used; /* out */
248 __u64 total_bytes; /* out */
249 /*
250 * Optional, out.
251 *
252 * Showing the fsid of the device, allowing user space to check if this
253 * device is a seeding one.
254 *
255 * Introduced in v6.3, thus user space still needs to check if kernel
256 * changed this value. Older kernel will not touch the values here.
257 */
258 __u8 fsid[BTRFS_UUID_SIZE];
259 __u64 unused[377]; /* pad to 4k */
260 __u8 path[BTRFS_DEVICE_PATH_NAME_MAX]; /* out */
261};
262
263/*
264 * Retrieve information about the filesystem
265 */
266
267/* Request information about checksum type and size */
268#define BTRFS_FS_INFO_FLAG_CSUM_INFO (1 << 0)
269
270/* Request information about filesystem generation */
271#define BTRFS_FS_INFO_FLAG_GENERATION (1 << 1)
272/* Request information about filesystem metadata UUID */
273#define BTRFS_FS_INFO_FLAG_METADATA_UUID (1 << 2)
274
275struct btrfs_ioctl_fs_info_args {
276 __u64 max_id; /* out */
277 __u64 num_devices; /* out */
278 __u8 fsid[BTRFS_FSID_SIZE]; /* out */
279 __u32 nodesize; /* out */
280 __u32 sectorsize; /* out */
281 __u32 clone_alignment; /* out */
282 /* See BTRFS_FS_INFO_FLAG_* */
283 __u16 csum_type; /* out */
284 __u16 csum_size; /* out */
285 __u64 flags; /* in/out */
286 __u64 generation; /* out */
287 __u8 metadata_uuid[BTRFS_FSID_SIZE]; /* out */
288 __u8 reserved[944]; /* pad to 1k */
289};
290
291/*
292 * feature flags
293 *
294 * Used by:
295 * struct btrfs_ioctl_feature_flags
296 */
297#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
298/*
299 * Older kernels (< 4.9) on big-endian systems produced broken free space tree
300 * bitmaps, and btrfs-progs also used to corrupt the free space tree (versions
301 * < 4.7.3). If this bit is clear, then the free space tree cannot be trusted.
302 * btrfs-progs can also intentionally clear this bit to ask the kernel to
303 * rebuild the free space tree, however this might not work on older kernels
304 * that do not know about this bit. If not sure, clear the cache manually on
305 * first mount when booting older kernel versions.
306 */
307#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)
308#define BTRFS_FEATURE_COMPAT_RO_VERITY (1ULL << 2)
309
310/*
311 * Put all block group items into a dedicated block group tree, greatly
312 * reducing mount time for large filesystem due to better locality.
313 */
314#define BTRFS_FEATURE_COMPAT_RO_BLOCK_GROUP_TREE (1ULL << 3)
315
316#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
317#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
318#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
319#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
320#define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD (1ULL << 4)
321
322/*
323 * older kernels tried to do bigger metadata blocks, but the
324 * code was pretty buggy. Lets not let them try anymore.
325 */
326#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
327
328#define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
329#define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
330#define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
331#define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
332#define BTRFS_FEATURE_INCOMPAT_METADATA_UUID (1ULL << 10)
333#define BTRFS_FEATURE_INCOMPAT_RAID1C34 (1ULL << 11)
334#define BTRFS_FEATURE_INCOMPAT_ZONED (1ULL << 12)
335#define BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2 (1ULL << 13)
336#define BTRFS_FEATURE_INCOMPAT_RAID_STRIPE_TREE (1ULL << 14)
337#define BTRFS_FEATURE_INCOMPAT_SIMPLE_QUOTA (1ULL << 16)
338
339struct btrfs_ioctl_feature_flags {
340 __u64 compat_flags;
341 __u64 compat_ro_flags;
342 __u64 incompat_flags;
343};
344
345/* balance control ioctl modes */
346#define BTRFS_BALANCE_CTL_PAUSE 1
347#define BTRFS_BALANCE_CTL_CANCEL 2
348
349/*
350 * this is packed, because it should be exactly the same as its disk
351 * byte order counterpart (struct btrfs_disk_balance_args)
352 */
353struct btrfs_balance_args {
354 __u64 profiles;
355
356 /*
357 * usage filter
358 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
359 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
360 */
361 union {
362 __u64 usage;
363 struct {
364 __u32 usage_min;
365 __u32 usage_max;
366 };
367 };
368 __u64 devid;
369 __u64 pstart;
370 __u64 pend;
371 __u64 vstart;
372 __u64 vend;
373
374 __u64 target;
375
376 __u64 flags;
377
378 /*
379 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
380 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
381 * and maximum
382 */
383 union {
384 __u64 limit; /* limit number of processed chunks */
385 struct {
386 __u32 limit_min;
387 __u32 limit_max;
388 };
389 };
390
391 /*
392 * Process chunks that cross stripes_min..stripes_max devices,
393 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
394 */
395 __u32 stripes_min;
396 __u32 stripes_max;
397
398 __u64 unused[6];
399} __attribute__ ((__packed__));
400
401/* report balance progress to userspace */
402struct btrfs_balance_progress {
403 __u64 expected; /* estimated # of chunks that will be
404 * relocated to fulfill the request */
405 __u64 considered; /* # of chunks we have considered so far */
406 __u64 completed; /* # of chunks relocated so far */
407};
408
409/*
410 * flags definition for balance
411 *
412 * Restriper's general type filter
413 *
414 * Used by:
415 * btrfs_ioctl_balance_args.flags
416 * btrfs_balance_control.flags (internal)
417 */
418#define BTRFS_BALANCE_DATA (1ULL << 0)
419#define BTRFS_BALANCE_SYSTEM (1ULL << 1)
420#define BTRFS_BALANCE_METADATA (1ULL << 2)
421
422#define BTRFS_BALANCE_TYPE_MASK (BTRFS_BALANCE_DATA | \
423 BTRFS_BALANCE_SYSTEM | \
424 BTRFS_BALANCE_METADATA)
425
426#define BTRFS_BALANCE_FORCE (1ULL << 3)
427#define BTRFS_BALANCE_RESUME (1ULL << 4)
428
429/*
430 * flags definitions for per-type balance args
431 *
432 * Balance filters
433 *
434 * Used by:
435 * struct btrfs_balance_args
436 */
437#define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0)
438#define BTRFS_BALANCE_ARGS_USAGE (1ULL << 1)
439#define BTRFS_BALANCE_ARGS_DEVID (1ULL << 2)
440#define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3)
441#define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4)
442#define BTRFS_BALANCE_ARGS_LIMIT (1ULL << 5)
443#define BTRFS_BALANCE_ARGS_LIMIT_RANGE (1ULL << 6)
444#define BTRFS_BALANCE_ARGS_STRIPES_RANGE (1ULL << 7)
445#define BTRFS_BALANCE_ARGS_USAGE_RANGE (1ULL << 10)
446
447#define BTRFS_BALANCE_ARGS_MASK \
448 (BTRFS_BALANCE_ARGS_PROFILES | \
449 BTRFS_BALANCE_ARGS_USAGE | \
450 BTRFS_BALANCE_ARGS_DEVID | \
451 BTRFS_BALANCE_ARGS_DRANGE | \
452 BTRFS_BALANCE_ARGS_VRANGE | \
453 BTRFS_BALANCE_ARGS_LIMIT | \
454 BTRFS_BALANCE_ARGS_LIMIT_RANGE | \
455 BTRFS_BALANCE_ARGS_STRIPES_RANGE | \
456 BTRFS_BALANCE_ARGS_USAGE_RANGE)
457
458/*
459 * Profile changing flags. When SOFT is set we won't relocate chunk if
460 * it already has the target profile (even though it may be
461 * half-filled).
462 */
463#define BTRFS_BALANCE_ARGS_CONVERT (1ULL << 8)
464#define BTRFS_BALANCE_ARGS_SOFT (1ULL << 9)
465
466
467/*
468 * flags definition for balance state
469 *
470 * Used by:
471 * struct btrfs_ioctl_balance_args.state
472 */
473#define BTRFS_BALANCE_STATE_RUNNING (1ULL << 0)
474#define BTRFS_BALANCE_STATE_PAUSE_REQ (1ULL << 1)
475#define BTRFS_BALANCE_STATE_CANCEL_REQ (1ULL << 2)
476
477struct btrfs_ioctl_balance_args {
478 __u64 flags; /* in/out */
479 __u64 state; /* out */
480
481 struct btrfs_balance_args data; /* in/out */
482 struct btrfs_balance_args meta; /* in/out */
483 struct btrfs_balance_args sys; /* in/out */
484
485 struct btrfs_balance_progress stat; /* out */
486
487 __u64 unused[72]; /* pad to 1k */
488};
489
490#define BTRFS_INO_LOOKUP_PATH_MAX 4080
491struct btrfs_ioctl_ino_lookup_args {
492 __u64 treeid;
493 __u64 objectid;
494 char name[BTRFS_INO_LOOKUP_PATH_MAX];
495};
496
497#define BTRFS_INO_LOOKUP_USER_PATH_MAX (4080 - BTRFS_VOL_NAME_MAX - 1)
498struct btrfs_ioctl_ino_lookup_user_args {
499 /* in, inode number containing the subvolume of 'subvolid' */
500 __u64 dirid;
501 /* in */
502 __u64 treeid;
503 /* out, name of the subvolume of 'treeid' */
504 char name[BTRFS_VOL_NAME_MAX + 1];
505 /*
506 * out, constructed path from the directory with which the ioctl is
507 * called to dirid
508 */
509 char path[BTRFS_INO_LOOKUP_USER_PATH_MAX];
510};
511
512/* Search criteria for the btrfs SEARCH ioctl family. */
513struct btrfs_ioctl_search_key {
514 /*
515 * The tree we're searching in. 1 is the tree of tree roots, 2 is the
516 * extent tree, etc...
517 *
518 * A special tree_id value of 0 will cause a search in the subvolume
519 * tree that the inode which is passed to the ioctl is part of.
520 */
521 __u64 tree_id; /* in */
522
523 /*
524 * When doing a tree search, we're actually taking a slice from a
525 * linear search space of 136-bit keys.
526 *
527 * A full 136-bit tree key is composed as:
528 * (objectid << 72) + (type << 64) + offset
529 *
530 * The individual min and max values for objectid, type and offset
531 * define the min_key and max_key values for the search range. All
532 * metadata items with a key in the interval [min_key, max_key] will be
533 * returned.
534 *
535 * Additionally, we can filter the items returned on transaction id of
536 * the metadata block they're stored in by specifying a transid range.
537 * Be aware that this transaction id only denotes when the metadata
538 * page that currently contains the item got written the last time as
539 * result of a COW operation. The number does not have any meaning
540 * related to the transaction in which an individual item that is being
541 * returned was created or changed.
542 */
543 __u64 min_objectid; /* in */
544 __u64 max_objectid; /* in */
545 __u64 min_offset; /* in */
546 __u64 max_offset; /* in */
547 __u64 min_transid; /* in */
548 __u64 max_transid; /* in */
549 __u32 min_type; /* in */
550 __u32 max_type; /* in */
551
552 /*
553 * input: The maximum amount of results desired.
554 * output: The actual amount of items returned, restricted by any of:
555 * - reaching the upper bound of the search range
556 * - reaching the input nr_items amount of items
557 * - completely filling the supplied memory buffer
558 */
559 __u32 nr_items; /* in/out */
560
561 /* align to 64 bits */
562 __u32 unused;
563
564 /* some extra for later */
565 __u64 unused1;
566 __u64 unused2;
567 __u64 unused3;
568 __u64 unused4;
569};
570
571struct btrfs_ioctl_search_header {
572 __u64 transid;
573 __u64 objectid;
574 __u64 offset;
575 __u32 type;
576 __u32 len;
577} __attribute__ ((__may_alias__));
578
579#define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
580/*
581 * the buf is an array of search headers where
582 * each header is followed by the actual item
583 * the type field is expanded to 32 bits for alignment
584 */
585struct btrfs_ioctl_search_args {
586 struct btrfs_ioctl_search_key key;
587 char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
588};
589
590/*
591 * Extended version of TREE_SEARCH ioctl that can return more than 4k of bytes.
592 * The allocated size of the buffer is set in buf_size.
593 */
594struct btrfs_ioctl_search_args_v2 {
595 struct btrfs_ioctl_search_key key; /* in/out - search parameters */
596 __u64 buf_size; /* in - size of buffer
597 * out - on EOVERFLOW: needed size
598 * to store item */
599 __u64 buf[]; /* out - found items */
600};
601
602/* With a @src_length of zero, the range from @src_offset->EOF is cloned! */
603struct btrfs_ioctl_clone_range_args {
604 __s64 src_fd;
605 __u64 src_offset, src_length;
606 __u64 dest_offset;
607};
608
609/*
610 * flags definition for the defrag range ioctl
611 *
612 * Used by:
613 * struct btrfs_ioctl_defrag_range_args.flags
614 */
615#define BTRFS_DEFRAG_RANGE_COMPRESS 1
616#define BTRFS_DEFRAG_RANGE_START_IO 2
617struct btrfs_ioctl_defrag_range_args {
618 /* start of the defrag operation */
619 __u64 start;
620
621 /* number of bytes to defrag, use (u64)-1 to say all */
622 __u64 len;
623
624 /*
625 * flags for the operation, which can include turning
626 * on compression for this one defrag
627 */
628 __u64 flags;
629
630 /*
631 * any extent bigger than this will be considered
632 * already defragged. Use 0 to take the kernel default
633 * Use 1 to say every single extent must be rewritten
634 */
635 __u32 extent_thresh;
636
637 /*
638 * which compression method to use if turning on compression
639 * for this defrag operation. If unspecified, zlib will
640 * be used
641 */
642 __u32 compress_type;
643
644 /* spare for later */
645 __u32 unused[4];
646};
647
648
649#define BTRFS_SAME_DATA_DIFFERS 1
650/* For extent-same ioctl */
651struct btrfs_ioctl_same_extent_info {
652 __s64 fd; /* in - destination file */
653 __u64 logical_offset; /* in - start of extent in destination */
654 __u64 bytes_deduped; /* out - total # of bytes we were able
655 * to dedupe from this file */
656 /* status of this dedupe operation:
657 * 0 if dedup succeeds
658 * < 0 for error
659 * == BTRFS_SAME_DATA_DIFFERS if data differs
660 */
661 __s32 status; /* out - see above description */
662 __u32 reserved;
663};
664
665struct btrfs_ioctl_same_args {
666 __u64 logical_offset; /* in - start of extent in source */
667 __u64 length; /* in - length of extent */
668 __u16 dest_count; /* in - total elements in info array */
669 __u16 reserved1;
670 __u32 reserved2;
671 struct btrfs_ioctl_same_extent_info info[];
672};
673
674struct btrfs_ioctl_space_info {
675 __u64 flags;
676 __u64 total_bytes;
677 __u64 used_bytes;
678};
679
680struct btrfs_ioctl_space_args {
681 __u64 space_slots;
682 __u64 total_spaces;
683 struct btrfs_ioctl_space_info spaces[];
684};
685
686struct btrfs_data_container {
687 __u32 bytes_left; /* out -- bytes not needed to deliver output */
688 __u32 bytes_missing; /* out -- additional bytes needed for result */
689 __u32 elem_cnt; /* out */
690 __u32 elem_missed; /* out */
691 __u64 val[]; /* out */
692};
693
694struct btrfs_ioctl_ino_path_args {
695 __u64 inum; /* in */
696 __u64 size; /* in */
697 __u64 reserved[4];
698 /* struct btrfs_data_container *fspath; out */
699 __u64 fspath; /* out */
700};
701
702struct btrfs_ioctl_logical_ino_args {
703 __u64 logical; /* in */
704 __u64 size; /* in */
705 __u64 reserved[3]; /* must be 0 for now */
706 __u64 flags; /* in, v2 only */
707 /* struct btrfs_data_container *inodes; out */
708 __u64 inodes;
709};
710
711/*
712 * Return every ref to the extent, not just those containing logical block.
713 * Requires logical == extent bytenr.
714 */
715#define BTRFS_LOGICAL_INO_ARGS_IGNORE_OFFSET (1ULL << 0)
716
717enum btrfs_dev_stat_values {
718 /* disk I/O failure stats */
719 BTRFS_DEV_STAT_WRITE_ERRS, /* EIO or EREMOTEIO from lower layers */
720 BTRFS_DEV_STAT_READ_ERRS, /* EIO or EREMOTEIO from lower layers */
721 BTRFS_DEV_STAT_FLUSH_ERRS, /* EIO or EREMOTEIO from lower layers */
722
723 /* stats for indirect indications for I/O failures */
724 BTRFS_DEV_STAT_CORRUPTION_ERRS, /* checksum error, bytenr error or
725 * contents is illegal: this is an
726 * indication that the block was damaged
727 * during read or write, or written to
728 * wrong location or read from wrong
729 * location */
730 BTRFS_DEV_STAT_GENERATION_ERRS, /* an indication that blocks have not
731 * been written */
732
733 BTRFS_DEV_STAT_VALUES_MAX
734};
735
736/* Reset statistics after reading; needs SYS_ADMIN capability */
737#define BTRFS_DEV_STATS_RESET (1ULL << 0)
738
739struct btrfs_ioctl_get_dev_stats {
740 __u64 devid; /* in */
741 __u64 nr_items; /* in/out */
742 __u64 flags; /* in/out */
743
744 /* out values: */
745 __u64 values[BTRFS_DEV_STAT_VALUES_MAX];
746
747 /*
748 * This pads the struct to 1032 bytes. It was originally meant to pad to
749 * 1024 bytes, but when adding the flags field, the padding calculation
750 * was not adjusted.
751 */
752 __u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX];
753};
754
755#define BTRFS_QUOTA_CTL_ENABLE 1
756#define BTRFS_QUOTA_CTL_DISABLE 2
757#define BTRFS_QUOTA_CTL_RESCAN__NOTUSED 3
758#define BTRFS_QUOTA_CTL_ENABLE_SIMPLE_QUOTA 4
759struct btrfs_ioctl_quota_ctl_args {
760 __u64 cmd;
761 __u64 status;
762};
763
764struct btrfs_ioctl_quota_rescan_args {
765 __u64 flags;
766 __u64 progress;
767 __u64 reserved[6];
768};
769
770struct btrfs_ioctl_qgroup_assign_args {
771 __u64 assign;
772 __u64 src;
773 __u64 dst;
774};
775
776struct btrfs_ioctl_qgroup_create_args {
777 __u64 create;
778 __u64 qgroupid;
779};
780struct btrfs_ioctl_timespec {
781 __u64 sec;
782 __u32 nsec;
783};
784
785struct btrfs_ioctl_received_subvol_args {
786 char uuid[BTRFS_UUID_SIZE]; /* in */
787 __u64 stransid; /* in */
788 __u64 rtransid; /* out */
789 struct btrfs_ioctl_timespec stime; /* in */
790 struct btrfs_ioctl_timespec rtime; /* out */
791 __u64 flags; /* in */
792 __u64 reserved[16]; /* in */
793};
794
795/*
796 * Caller doesn't want file data in the send stream, even if the
797 * search of clone sources doesn't find an extent. UPDATE_EXTENT
798 * commands will be sent instead of WRITE commands.
799 */
800#define BTRFS_SEND_FLAG_NO_FILE_DATA 0x1
801
802/*
803 * Do not add the leading stream header. Used when multiple snapshots
804 * are sent back to back.
805 */
806#define BTRFS_SEND_FLAG_OMIT_STREAM_HEADER 0x2
807
808/*
809 * Omit the command at the end of the stream that indicated the end
810 * of the stream. This option is used when multiple snapshots are
811 * sent back to back.
812 */
813#define BTRFS_SEND_FLAG_OMIT_END_CMD 0x4
814
815/*
816 * Read the protocol version in the structure
817 */
818#define BTRFS_SEND_FLAG_VERSION 0x8
819
820/*
821 * Send compressed data using the ENCODED_WRITE command instead of decompressing
822 * the data and sending it with the WRITE command. This requires protocol
823 * version >= 2.
824 */
825#define BTRFS_SEND_FLAG_COMPRESSED 0x10
826
827#define BTRFS_SEND_FLAG_MASK \
828 (BTRFS_SEND_FLAG_NO_FILE_DATA | \
829 BTRFS_SEND_FLAG_OMIT_STREAM_HEADER | \
830 BTRFS_SEND_FLAG_OMIT_END_CMD | \
831 BTRFS_SEND_FLAG_VERSION | \
832 BTRFS_SEND_FLAG_COMPRESSED)
833
834struct btrfs_ioctl_send_args {
835 __s64 send_fd; /* in */
836 __u64 clone_sources_count; /* in */
837 __u64 __user *clone_sources; /* in */
838 __u64 parent_root; /* in */
839 __u64 flags; /* in */
840 __u32 version; /* in */
841 __u8 reserved[28]; /* in */
842};
843
844/*
845 * Information about a fs tree root.
846 *
847 * All items are filled by the ioctl
848 */
849struct btrfs_ioctl_get_subvol_info_args {
850 /* Id of this subvolume */
851 __u64 treeid;
852
853 /* Name of this subvolume, used to get the real name at mount point */
854 char name[BTRFS_VOL_NAME_MAX + 1];
855
856 /*
857 * Id of the subvolume which contains this subvolume.
858 * Zero for top-level subvolume or a deleted subvolume.
859 */
860 __u64 parent_id;
861
862 /*
863 * Inode number of the directory which contains this subvolume.
864 * Zero for top-level subvolume or a deleted subvolume
865 */
866 __u64 dirid;
867
868 /* Latest transaction id of this subvolume */
869 __u64 generation;
870
871 /* Flags of this subvolume */
872 __u64 flags;
873
874 /* UUID of this subvolume */
875 __u8 uuid[BTRFS_UUID_SIZE];
876
877 /*
878 * UUID of the subvolume of which this subvolume is a snapshot.
879 * All zero for a non-snapshot subvolume.
880 */
881 __u8 parent_uuid[BTRFS_UUID_SIZE];
882
883 /*
884 * UUID of the subvolume from which this subvolume was received.
885 * All zero for non-received subvolume.
886 */
887 __u8 received_uuid[BTRFS_UUID_SIZE];
888
889 /* Transaction id indicating when change/create/send/receive happened */
890 __u64 ctransid;
891 __u64 otransid;
892 __u64 stransid;
893 __u64 rtransid;
894 /* Time corresponding to c/o/s/rtransid */
895 struct btrfs_ioctl_timespec ctime;
896 struct btrfs_ioctl_timespec otime;
897 struct btrfs_ioctl_timespec stime;
898 struct btrfs_ioctl_timespec rtime;
899
900 /* Must be zero */
901 __u64 reserved[8];
902};
903
904#define BTRFS_MAX_ROOTREF_BUFFER_NUM 255
905struct btrfs_ioctl_get_subvol_rootref_args {
906 /* in/out, minimum id of rootref's treeid to be searched */
907 __u64 min_treeid;
908
909 /* out */
910 struct {
911 __u64 treeid;
912 __u64 dirid;
913 } rootref[BTRFS_MAX_ROOTREF_BUFFER_NUM];
914
915 /* out, number of found items */
916 __u8 num_items;
917 __u8 align[7];
918};
919
920/*
921 * Data and metadata for an encoded read or write.
922 *
923 * Encoded I/O bypasses any encoding automatically done by the filesystem (e.g.,
924 * compression). This can be used to read the compressed contents of a file or
925 * write pre-compressed data directly to a file.
926 *
927 * BTRFS_IOC_ENCODED_READ and BTRFS_IOC_ENCODED_WRITE are essentially
928 * preadv/pwritev with additional metadata about how the data is encoded and the
929 * size of the unencoded data.
930 *
931 * BTRFS_IOC_ENCODED_READ fills the given iovecs with the encoded data, fills
932 * the metadata fields, and returns the size of the encoded data. It reads one
933 * extent per call. It can also read data which is not encoded.
934 *
935 * BTRFS_IOC_ENCODED_WRITE uses the metadata fields, writes the encoded data
936 * from the iovecs, and returns the size of the encoded data. Note that the
937 * encoded data is not validated when it is written; if it is not valid (e.g.,
938 * it cannot be decompressed), then a subsequent read may return an error.
939 *
940 * Since the filesystem page cache contains decoded data, encoded I/O bypasses
941 * the page cache. Encoded I/O requires CAP_SYS_ADMIN.
942 */
943struct btrfs_ioctl_encoded_io_args {
944 /* Input parameters for both reads and writes. */
945
946 /*
947 * iovecs containing encoded data.
948 *
949 * For reads, if the size of the encoded data is larger than the sum of
950 * iov[n].iov_len for 0 <= n < iovcnt, then the ioctl fails with
951 * ENOBUFS.
952 *
953 * For writes, the size of the encoded data is the sum of iov[n].iov_len
954 * for 0 <= n < iovcnt. This must be less than 128 KiB (this limit may
955 * increase in the future). This must also be less than or equal to
956 * unencoded_len.
957 */
958 const struct iovec __user *iov;
959 /* Number of iovecs. */
960 unsigned long iovcnt;
961 /*
962 * Offset in file.
963 *
964 * For writes, must be aligned to the sector size of the filesystem.
965 */
966 __s64 offset;
967 /* Currently must be zero. */
968 __u64 flags;
969
970 /*
971 * For reads, the following members are output parameters that will
972 * contain the returned metadata for the encoded data.
973 * For writes, the following members must be set to the metadata for the
974 * encoded data.
975 */
976
977 /*
978 * Length of the data in the file.
979 *
980 * Must be less than or equal to unencoded_len - unencoded_offset. For
981 * writes, must be aligned to the sector size of the filesystem unless
982 * the data ends at or beyond the current end of the file.
983 */
984 __u64 len;
985 /*
986 * Length of the unencoded (i.e., decrypted and decompressed) data.
987 *
988 * For writes, must be no more than 128 KiB (this limit may increase in
989 * the future). If the unencoded data is actually longer than
990 * unencoded_len, then it is truncated; if it is shorter, then it is
991 * extended with zeroes.
992 */
993 __u64 unencoded_len;
994 /*
995 * Offset from the first byte of the unencoded data to the first byte of
996 * logical data in the file.
997 *
998 * Must be less than unencoded_len.
999 */
1000 __u64 unencoded_offset;
1001 /*
1002 * BTRFS_ENCODED_IO_COMPRESSION_* type.
1003 *
1004 * For writes, must not be BTRFS_ENCODED_IO_COMPRESSION_NONE.
1005 */
1006 __u32 compression;
1007 /* Currently always BTRFS_ENCODED_IO_ENCRYPTION_NONE. */
1008 __u32 encryption;
1009 /*
1010 * Reserved for future expansion.
1011 *
1012 * For reads, always returned as zero. Users should check for non-zero
1013 * bytes. If there are any, then the kernel has a newer version of this
1014 * structure with additional information that the user definition is
1015 * missing.
1016 *
1017 * For writes, must be zeroed.
1018 */
1019 __u8 reserved[64];
1020};
1021
1022/* Data is not compressed. */
1023#define BTRFS_ENCODED_IO_COMPRESSION_NONE 0
1024/* Data is compressed as a single zlib stream. */
1025#define BTRFS_ENCODED_IO_COMPRESSION_ZLIB 1
1026/*
1027 * Data is compressed as a single zstd frame with the windowLog compression
1028 * parameter set to no more than 17.
1029 */
1030#define BTRFS_ENCODED_IO_COMPRESSION_ZSTD 2
1031/*
1032 * Data is compressed sector by sector (using the sector size indicated by the
1033 * name of the constant) with LZO1X and wrapped in the format documented in
1034 * fs/btrfs/lzo.c. For writes, the compression sector size must match the
1035 * filesystem sector size.
1036 */
1037#define BTRFS_ENCODED_IO_COMPRESSION_LZO_4K 3
1038#define BTRFS_ENCODED_IO_COMPRESSION_LZO_8K 4
1039#define BTRFS_ENCODED_IO_COMPRESSION_LZO_16K 5
1040#define BTRFS_ENCODED_IO_COMPRESSION_LZO_32K 6
1041#define BTRFS_ENCODED_IO_COMPRESSION_LZO_64K 7
1042#define BTRFS_ENCODED_IO_COMPRESSION_TYPES 8
1043
1044/* Data is not encrypted. */
1045#define BTRFS_ENCODED_IO_ENCRYPTION_NONE 0
1046#define BTRFS_ENCODED_IO_ENCRYPTION_TYPES 1
1047
1048/* Error codes as returned by the kernel */
1049enum btrfs_err_code {
1050 BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET = 1,
1051 BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET,
1052 BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET,
1053 BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET,
1054 BTRFS_ERROR_DEV_TGT_REPLACE,
1055 BTRFS_ERROR_DEV_MISSING_NOT_FOUND,
1056 BTRFS_ERROR_DEV_ONLY_WRITABLE,
1057 BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS,
1058 BTRFS_ERROR_DEV_RAID1C3_MIN_NOT_MET,
1059 BTRFS_ERROR_DEV_RAID1C4_MIN_NOT_MET,
1060};
1061
1062#define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
1063 struct btrfs_ioctl_vol_args)
1064#define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
1065 struct btrfs_ioctl_vol_args)
1066#define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
1067 struct btrfs_ioctl_vol_args)
1068#define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
1069 struct btrfs_ioctl_vol_args)
1070#define BTRFS_IOC_FORGET_DEV _IOW(BTRFS_IOCTL_MAGIC, 5, \
1071 struct btrfs_ioctl_vol_args)
1072/* trans start and trans end are dangerous, and only for
1073 * use by applications that know how to avoid the
1074 * resulting deadlocks
1075 */
1076#define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6)
1077#define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7)
1078#define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8)
1079
1080#define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
1081#define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
1082 struct btrfs_ioctl_vol_args)
1083#define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
1084 struct btrfs_ioctl_vol_args)
1085#define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
1086 struct btrfs_ioctl_vol_args)
1087
1088#define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
1089 struct btrfs_ioctl_clone_range_args)
1090
1091#define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
1092 struct btrfs_ioctl_vol_args)
1093#define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
1094 struct btrfs_ioctl_vol_args)
1095#define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
1096 struct btrfs_ioctl_defrag_range_args)
1097#define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
1098 struct btrfs_ioctl_search_args)
1099#define BTRFS_IOC_TREE_SEARCH_V2 _IOWR(BTRFS_IOCTL_MAGIC, 17, \
1100 struct btrfs_ioctl_search_args_v2)
1101#define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
1102 struct btrfs_ioctl_ino_lookup_args)
1103#define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, __u64)
1104#define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
1105 struct btrfs_ioctl_space_args)
1106#define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
1107#define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
1108#define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
1109 struct btrfs_ioctl_vol_args_v2)
1110#define BTRFS_IOC_SUBVOL_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 24, \
1111 struct btrfs_ioctl_vol_args_v2)
1112#define BTRFS_IOC_SUBVOL_GETFLAGS _IOR(BTRFS_IOCTL_MAGIC, 25, __u64)
1113#define BTRFS_IOC_SUBVOL_SETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 26, __u64)
1114#define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \
1115 struct btrfs_ioctl_scrub_args)
1116#define BTRFS_IOC_SCRUB_CANCEL _IO(BTRFS_IOCTL_MAGIC, 28)
1117#define BTRFS_IOC_SCRUB_PROGRESS _IOWR(BTRFS_IOCTL_MAGIC, 29, \
1118 struct btrfs_ioctl_scrub_args)
1119#define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \
1120 struct btrfs_ioctl_dev_info_args)
1121#define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \
1122 struct btrfs_ioctl_fs_info_args)
1123#define BTRFS_IOC_BALANCE_V2 _IOWR(BTRFS_IOCTL_MAGIC, 32, \
1124 struct btrfs_ioctl_balance_args)
1125#define BTRFS_IOC_BALANCE_CTL _IOW(BTRFS_IOCTL_MAGIC, 33, int)
1126#define BTRFS_IOC_BALANCE_PROGRESS _IOR(BTRFS_IOCTL_MAGIC, 34, \
1127 struct btrfs_ioctl_balance_args)
1128#define BTRFS_IOC_INO_PATHS _IOWR(BTRFS_IOCTL_MAGIC, 35, \
1129 struct btrfs_ioctl_ino_path_args)
1130#define BTRFS_IOC_LOGICAL_INO _IOWR(BTRFS_IOCTL_MAGIC, 36, \
1131 struct btrfs_ioctl_logical_ino_args)
1132#define BTRFS_IOC_SET_RECEIVED_SUBVOL _IOWR(BTRFS_IOCTL_MAGIC, 37, \
1133 struct btrfs_ioctl_received_subvol_args)
1134#define BTRFS_IOC_SEND _IOW(BTRFS_IOCTL_MAGIC, 38, struct btrfs_ioctl_send_args)
1135#define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \
1136 struct btrfs_ioctl_vol_args)
1137#define BTRFS_IOC_QUOTA_CTL _IOWR(BTRFS_IOCTL_MAGIC, 40, \
1138 struct btrfs_ioctl_quota_ctl_args)
1139#define BTRFS_IOC_QGROUP_ASSIGN _IOW(BTRFS_IOCTL_MAGIC, 41, \
1140 struct btrfs_ioctl_qgroup_assign_args)
1141#define BTRFS_IOC_QGROUP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 42, \
1142 struct btrfs_ioctl_qgroup_create_args)
1143#define BTRFS_IOC_QGROUP_LIMIT _IOR(BTRFS_IOCTL_MAGIC, 43, \
1144 struct btrfs_ioctl_qgroup_limit_args)
1145#define BTRFS_IOC_QUOTA_RESCAN _IOW(BTRFS_IOCTL_MAGIC, 44, \
1146 struct btrfs_ioctl_quota_rescan_args)
1147#define BTRFS_IOC_QUOTA_RESCAN_STATUS _IOR(BTRFS_IOCTL_MAGIC, 45, \
1148 struct btrfs_ioctl_quota_rescan_args)
1149#define BTRFS_IOC_QUOTA_RESCAN_WAIT _IO(BTRFS_IOCTL_MAGIC, 46)
1150#define BTRFS_IOC_GET_FSLABEL FS_IOC_GETFSLABEL
1151#define BTRFS_IOC_SET_FSLABEL FS_IOC_SETFSLABEL
1152#define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \
1153 struct btrfs_ioctl_get_dev_stats)
1154#define BTRFS_IOC_DEV_REPLACE _IOWR(BTRFS_IOCTL_MAGIC, 53, \
1155 struct btrfs_ioctl_dev_replace_args)
1156#define BTRFS_IOC_FILE_EXTENT_SAME _IOWR(BTRFS_IOCTL_MAGIC, 54, \
1157 struct btrfs_ioctl_same_args)
1158#define BTRFS_IOC_GET_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
1159 struct btrfs_ioctl_feature_flags)
1160#define BTRFS_IOC_SET_FEATURES _IOW(BTRFS_IOCTL_MAGIC, 57, \
1161 struct btrfs_ioctl_feature_flags[2])
1162#define BTRFS_IOC_GET_SUPPORTED_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
1163 struct btrfs_ioctl_feature_flags[3])
1164#define BTRFS_IOC_RM_DEV_V2 _IOW(BTRFS_IOCTL_MAGIC, 58, \
1165 struct btrfs_ioctl_vol_args_v2)
1166#define BTRFS_IOC_LOGICAL_INO_V2 _IOWR(BTRFS_IOCTL_MAGIC, 59, \
1167 struct btrfs_ioctl_logical_ino_args)
1168#define BTRFS_IOC_GET_SUBVOL_INFO _IOR(BTRFS_IOCTL_MAGIC, 60, \
1169 struct btrfs_ioctl_get_subvol_info_args)
1170#define BTRFS_IOC_GET_SUBVOL_ROOTREF _IOWR(BTRFS_IOCTL_MAGIC, 61, \
1171 struct btrfs_ioctl_get_subvol_rootref_args)
1172#define BTRFS_IOC_INO_LOOKUP_USER _IOWR(BTRFS_IOCTL_MAGIC, 62, \
1173 struct btrfs_ioctl_ino_lookup_user_args)
1174#define BTRFS_IOC_SNAP_DESTROY_V2 _IOW(BTRFS_IOCTL_MAGIC, 63, \
1175 struct btrfs_ioctl_vol_args_v2)
1176#define BTRFS_IOC_ENCODED_READ _IOR(BTRFS_IOCTL_MAGIC, 64, \
1177 struct btrfs_ioctl_encoded_io_args)
1178#define BTRFS_IOC_ENCODED_WRITE _IOW(BTRFS_IOCTL_MAGIC, 64, \
1179 struct btrfs_ioctl_encoded_io_args)
1180
1181#ifdef __cplusplus
1182}
1183#endif
1184
1185#endif /* _UAPI_LINUX_BTRFS_H */
1186

source code of linux/include/uapi/linux/btrfs.h