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 _LINUX_BTRFS_H
21#define _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/* Deprecated since 5.7 */
46# define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)
47#define BTRFS_SUBVOL_RDONLY (1ULL << 1)
48#define BTRFS_SUBVOL_QGROUP_INHERIT (1ULL << 2)
49
50#define BTRFS_DEVICE_SPEC_BY_ID (1ULL << 3)
51
52#define BTRFS_SUBVOL_SPEC_BY_ID (1ULL << 4)
53
54#define BTRFS_VOL_ARG_V2_FLAGS_SUPPORTED \
55 (BTRFS_SUBVOL_RDONLY | \
56 BTRFS_SUBVOL_QGROUP_INHERIT | \
57 BTRFS_DEVICE_SPEC_BY_ID | \
58 BTRFS_SUBVOL_SPEC_BY_ID)
59
60#define BTRFS_FSID_SIZE 16
61#define BTRFS_UUID_SIZE 16
62#define BTRFS_UUID_UNPARSED_SIZE 37
63
64/*
65 * flags definition for qgroup limits
66 *
67 * Used by:
68 * struct btrfs_qgroup_limit.flags
69 * struct btrfs_qgroup_limit_item.flags
70 */
71#define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
72#define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
73#define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
74#define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
75#define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
76#define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
77
78struct btrfs_qgroup_limit {
79 __u64 flags;
80 __u64 max_rfer;
81 __u64 max_excl;
82 __u64 rsv_rfer;
83 __u64 rsv_excl;
84};
85
86/*
87 * flags definition for qgroup inheritance
88 *
89 * Used by:
90 * struct btrfs_qgroup_inherit.flags
91 */
92#define BTRFS_QGROUP_INHERIT_SET_LIMITS (1ULL << 0)
93#define BTRFS_QGROUP_INHERIT_FLAGS_SUPP (BTRFS_QGROUP_INHERIT_SET_LIMITS)
94
95struct btrfs_qgroup_inherit {
96 __u64 flags;
97 __u64 num_qgroups;
98 __u64 num_ref_copies;
99 __u64 num_excl_copies;
100 struct btrfs_qgroup_limit lim;
101 __u64 qgroups[];
102};
103
104struct btrfs_ioctl_qgroup_limit_args {
105 __u64 qgroupid;
106 struct btrfs_qgroup_limit lim;
107};
108
109/*
110 * Arguments for specification of subvolumes or devices, supporting by-name or
111 * by-id and flags
112 *
113 * The set of supported flags depends on the ioctl
114 *
115 * BTRFS_SUBVOL_RDONLY is also provided/consumed by the following ioctls:
116 * - BTRFS_IOC_SUBVOL_GETFLAGS
117 * - BTRFS_IOC_SUBVOL_SETFLAGS
118 */
119
120/* Supported flags for BTRFS_IOC_RM_DEV_V2 */
121#define BTRFS_DEVICE_REMOVE_ARGS_MASK \
122 (BTRFS_DEVICE_SPEC_BY_ID)
123
124/* Supported flags for BTRFS_IOC_SNAP_CREATE_V2 and BTRFS_IOC_SUBVOL_CREATE_V2 */
125#define BTRFS_SUBVOL_CREATE_ARGS_MASK \
126 (BTRFS_SUBVOL_RDONLY | \
127 BTRFS_SUBVOL_QGROUP_INHERIT)
128
129/* Supported flags for BTRFS_IOC_SNAP_DESTROY_V2 */
130#define BTRFS_SUBVOL_DELETE_ARGS_MASK \
131 (BTRFS_SUBVOL_SPEC_BY_ID)
132
133struct btrfs_ioctl_vol_args_v2 {
134 __s64 fd;
135 __u64 transid;
136 __u64 flags;
137 union {
138 struct {
139 __u64 size;
140 struct btrfs_qgroup_inherit *qgroup_inherit;
141 };
142 __u64 unused[4];
143 };
144 union {
145 char name[BTRFS_SUBVOL_NAME_MAX + 1];
146 __u64 devid;
147 __u64 subvolid;
148 };
149};
150
151/*
152 * structure to report errors and progress to userspace, either as a
153 * result of a finished scrub, a canceled scrub or a progress inquiry
154 */
155struct btrfs_scrub_progress {
156 __u64 data_extents_scrubbed; /* # of data extents scrubbed */
157 __u64 tree_extents_scrubbed; /* # of tree extents scrubbed */
158 __u64 data_bytes_scrubbed; /* # of data bytes scrubbed */
159 __u64 tree_bytes_scrubbed; /* # of tree bytes scrubbed */
160 __u64 read_errors; /* # of read errors encountered (EIO) */
161 __u64 csum_errors; /* # of failed csum checks */
162 __u64 verify_errors; /* # of occurrences, where the metadata
163 * of a tree block did not match the
164 * expected values, like generation or
165 * logical */
166 __u64 no_csum; /* # of 4k data block for which no csum
167 * is present, probably the result of
168 * data written with nodatasum */
169 __u64 csum_discards; /* # of csum for which no data was found
170 * in the extent tree. */
171 __u64 super_errors; /* # of bad super blocks encountered */
172 __u64 malloc_errors; /* # of internal kmalloc errors. These
173 * will likely cause an incomplete
174 * scrub */
175 __u64 uncorrectable_errors; /* # of errors where either no intact
176 * copy was found or the writeback
177 * failed */
178 __u64 corrected_errors; /* # of errors corrected */
179 __u64 last_physical; /* last physical address scrubbed. In
180 * case a scrub was aborted, this can
181 * be used to restart the scrub */
182 __u64 unverified_errors; /* # of occurrences where a read for a
183 * full (64k) bio failed, but the re-
184 * check succeeded for each 4k piece.
185 * Intermittent error. */
186};
187
188#define BTRFS_SCRUB_READONLY 1
189#define BTRFS_SCRUB_SUPPORTED_FLAGS (BTRFS_SCRUB_READONLY)
190struct btrfs_ioctl_scrub_args {
191 __u64 devid; /* in */
192 __u64 start; /* in */
193 __u64 end; /* in */
194 __u64 flags; /* in */
195 struct btrfs_scrub_progress progress; /* out */
196 /* pad to 1k */
197 __u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8];
198};
199
200#define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
201#define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
202struct btrfs_ioctl_dev_replace_start_params {
203 __u64 srcdevid; /* in, if 0, use srcdev_name instead */
204 __u64 cont_reading_from_srcdev_mode; /* in, see #define
205 * above */
206 __u8 srcdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */
207 __u8 tgtdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */
208};
209
210#define BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED 0
211#define BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED 1
212#define BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED 2
213#define BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED 3
214#define BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED 4
215struct btrfs_ioctl_dev_replace_status_params {
216 __u64 replace_state; /* out, see #define above */
217 __u64 progress_1000; /* out, 0 <= x <= 1000 */
218 __u64 time_started; /* out, seconds since 1-Jan-1970 */
219 __u64 time_stopped; /* out, seconds since 1-Jan-1970 */
220 __u64 num_write_errors; /* out */
221 __u64 num_uncorrectable_read_errors; /* out */
222};
223
224#define BTRFS_IOCTL_DEV_REPLACE_CMD_START 0
225#define BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS 1
226#define BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL 2
227#define BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR 0
228#define BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED 1
229#define BTRFS_IOCTL_DEV_REPLACE_RESULT_ALREADY_STARTED 2
230#define BTRFS_IOCTL_DEV_REPLACE_RESULT_SCRUB_INPROGRESS 3
231struct btrfs_ioctl_dev_replace_args {
232 __u64 cmd; /* in */
233 __u64 result; /* out */
234
235 union {
236 struct btrfs_ioctl_dev_replace_start_params start;
237 struct btrfs_ioctl_dev_replace_status_params status;
238 }; /* in/out */
239
240 __u64 spare[64];
241};
242
243struct btrfs_ioctl_dev_info_args {
244 __u64 devid; /* in/out */
245 __u8 uuid[BTRFS_UUID_SIZE]; /* in/out */
246 __u64 bytes_used; /* out */
247 __u64 total_bytes; /* out */
248 /*
249 * Optional, out.
250 *
251 * Showing the fsid of the device, allowing user space to check if this
252 * device is a seeding one.
253 *
254 * Introduced in v6.3, thus user space still needs to check if kernel
255 * changed this value. Older kernel will not touch the values here.
256 */
257 __u8 fsid[BTRFS_UUID_SIZE];
258 __u64 unused[377]; /* pad to 4k */
259 __u8 path[BTRFS_DEVICE_PATH_NAME_MAX]; /* out */
260};
261
262/*
263 * Retrieve information about the filesystem
264 */
265
266/* Request information about checksum type and size */
267#define BTRFS_FS_INFO_FLAG_CSUM_INFO (1 << 0)
268
269/* Request information about filesystem generation */
270#define BTRFS_FS_INFO_FLAG_GENERATION (1 << 1)
271/* Request information about filesystem metadata UUID */
272#define BTRFS_FS_INFO_FLAG_METADATA_UUID (1 << 2)
273
274struct btrfs_ioctl_fs_info_args {
275 __u64 max_id; /* out */
276 __u64 num_devices; /* out */
277 __u8 fsid[BTRFS_FSID_SIZE]; /* out */
278 __u32 nodesize; /* out */
279 __u32 sectorsize; /* out */
280 __u32 clone_alignment; /* out */
281 /* See BTRFS_FS_INFO_FLAG_* */
282 __u16 csum_type; /* out */
283 __u16 csum_size; /* out */
284 __u64 flags; /* in/out */
285 __u64 generation; /* out */
286 __u8 metadata_uuid[BTRFS_FSID_SIZE]; /* out */
287 __u8 reserved[944]; /* pad to 1k */
288};
289
290/*
291 * feature flags
292 *
293 * Used by:
294 * struct btrfs_ioctl_feature_flags
295 */
296#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
297/*
298 * Older kernels (< 4.9) on big-endian systems produced broken free space tree
299 * bitmaps, and btrfs-progs also used to corrupt the free space tree (versions
300 * < 4.7.3). If this bit is clear, then the free space tree cannot be trusted.
301 * btrfs-progs can also intentionally clear this bit to ask the kernel to
302 * rebuild the free space tree, however this might not work on older kernels
303 * that do not know about this bit. If not sure, clear the cache manually on
304 * first mount when booting older kernel versions.
305 */
306#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)
307#define BTRFS_FEATURE_COMPAT_RO_VERITY (1ULL << 2)
308
309/*
310 * Put all block group items into a dedicated block group tree, greatly
311 * reducing mount time for large filesystem due to better locality.
312 */
313#define BTRFS_FEATURE_COMPAT_RO_BLOCK_GROUP_TREE (1ULL << 3)
314
315#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
316#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
317#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
318#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
319#define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD (1ULL << 4)
320
321/*
322 * older kernels tried to do bigger metadata blocks, but the
323 * code was pretty buggy. Lets not let them try anymore.
324 */
325#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
326
327#define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
328#define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
329#define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
330#define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
331#define BTRFS_FEATURE_INCOMPAT_METADATA_UUID (1ULL << 10)
332#define BTRFS_FEATURE_INCOMPAT_RAID1C34 (1ULL << 11)
333#define BTRFS_FEATURE_INCOMPAT_ZONED (1ULL << 12)
334#define BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2 (1ULL << 13)
335#define BTRFS_FEATURE_INCOMPAT_RAID_STRIPE_TREE (1ULL << 14)
336#define BTRFS_FEATURE_INCOMPAT_SIMPLE_QUOTA (1ULL << 16)
337#define BTRFS_FEATURE_INCOMPAT_REMAP_TREE (1ULL << 17)
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 __u8 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
617#define BTRFS_DEFRAG_RANGE_COMPRESS_LEVEL 4
618/* Request no compression on the range (uncompress if necessary). */
619#define BTRFS_DEFRAG_RANGE_NOCOMPRESS 8
620#define BTRFS_DEFRAG_RANGE_FLAGS_SUPP (BTRFS_DEFRAG_RANGE_COMPRESS | \
621 BTRFS_DEFRAG_RANGE_COMPRESS_LEVEL | \
622 BTRFS_DEFRAG_RANGE_NOCOMPRESS | \
623 BTRFS_DEFRAG_RANGE_START_IO)
624
625struct btrfs_ioctl_defrag_range_args {
626 /* start of the defrag operation */
627 __u64 start;
628
629 /* number of bytes to defrag, use (u64)-1 to say all */
630 __u64 len;
631
632 /*
633 * flags for the operation, which can include turning
634 * on compression for this one defrag
635 */
636 __u64 flags;
637
638 /*
639 * any extent bigger than this will be considered
640 * already defragged. Use 0 to take the kernel default
641 * Use 1 to say every single extent must be rewritten
642 */
643 __u32 extent_thresh;
644
645 /*
646 * which compression method to use if turning on compression
647 * for this defrag operation. If unspecified, zlib will be
648 * used. If compression level is also being specified, set the
649 * BTRFS_DEFRAG_RANGE_COMPRESS_LEVEL flag and fill the compress
650 * member structure instead of the compress_type field.
651 */
652 union {
653 __u32 compress_type;
654 struct {
655 __u8 type;
656 __s8 level;
657 } compress;
658 };
659
660 /* spare for later */
661 __u32 unused[4];
662};
663
664
665#define BTRFS_SAME_DATA_DIFFERS 1
666/* For extent-same ioctl */
667struct btrfs_ioctl_same_extent_info {
668 __s64 fd; /* in - destination file */
669 __u64 logical_offset; /* in - start of extent in destination */
670 __u64 bytes_deduped; /* out - total # of bytes we were able
671 * to dedupe from this file */
672 /* status of this dedupe operation:
673 * 0 if dedup succeeds
674 * < 0 for error
675 * == BTRFS_SAME_DATA_DIFFERS if data differs
676 */
677 __s32 status; /* out - see above description */
678 __u32 reserved;
679};
680
681struct btrfs_ioctl_same_args {
682 __u64 logical_offset; /* in - start of extent in source */
683 __u64 length; /* in - length of extent */
684 __u16 dest_count; /* in - total elements in info array */
685 __u16 reserved1;
686 __u32 reserved2;
687 struct btrfs_ioctl_same_extent_info info[];
688};
689
690struct btrfs_ioctl_space_info {
691 __u64 flags;
692 __u64 total_bytes;
693 __u64 used_bytes;
694};
695
696struct btrfs_ioctl_space_args {
697 __u64 space_slots;
698 __u64 total_spaces;
699 struct btrfs_ioctl_space_info spaces[];
700};
701
702struct btrfs_data_container {
703 __u32 bytes_left; /* out -- bytes not needed to deliver output */
704 __u32 bytes_missing; /* out -- additional bytes needed for result */
705 __u32 elem_cnt; /* out */
706 __u32 elem_missed; /* out */
707 __u64 val[]; /* out */
708};
709
710struct btrfs_ioctl_ino_path_args {
711 __u64 inum; /* in */
712 __u64 size; /* in */
713 __u64 reserved[4];
714 /* struct btrfs_data_container *fspath; out */
715 __u64 fspath; /* out */
716};
717
718struct btrfs_ioctl_logical_ino_args {
719 __u64 logical; /* in */
720 __u64 size; /* in */
721 __u64 reserved[3]; /* must be 0 for now */
722 __u64 flags; /* in, v2 only */
723 /* struct btrfs_data_container *inodes; out */
724 __u64 inodes;
725};
726
727/*
728 * Return every ref to the extent, not just those containing logical block.
729 * Requires logical == extent bytenr.
730 */
731#define BTRFS_LOGICAL_INO_ARGS_IGNORE_OFFSET (1ULL << 0)
732
733enum btrfs_dev_stat_values {
734 /* disk I/O failure stats */
735 BTRFS_DEV_STAT_WRITE_ERRS, /* EIO or EREMOTEIO from lower layers */
736 BTRFS_DEV_STAT_READ_ERRS, /* EIO or EREMOTEIO from lower layers */
737 BTRFS_DEV_STAT_FLUSH_ERRS, /* EIO or EREMOTEIO from lower layers */
738
739 /* stats for indirect indications for I/O failures */
740 BTRFS_DEV_STAT_CORRUPTION_ERRS, /* checksum error, bytenr error or
741 * contents is illegal: this is an
742 * indication that the block was damaged
743 * during read or write, or written to
744 * wrong location or read from wrong
745 * location */
746 BTRFS_DEV_STAT_GENERATION_ERRS, /* an indication that blocks have not
747 * been written */
748
749 BTRFS_DEV_STAT_VALUES_MAX
750};
751
752/* Reset statistics after reading; needs SYS_ADMIN capability */
753#define BTRFS_DEV_STATS_RESET (1ULL << 0)
754
755struct btrfs_ioctl_get_dev_stats {
756 __u64 devid; /* in */
757 __u64 nr_items; /* in/out */
758 __u64 flags; /* in/out */
759
760 /* out values: */
761 __u64 values[BTRFS_DEV_STAT_VALUES_MAX];
762
763 /*
764 * This pads the struct to 1032 bytes. It was originally meant to pad to
765 * 1024 bytes, but when adding the flags field, the padding calculation
766 * was not adjusted.
767 */
768 __u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX];
769};
770
771#define BTRFS_QUOTA_CTL_ENABLE 1
772#define BTRFS_QUOTA_CTL_DISABLE 2
773#define BTRFS_QUOTA_CTL_RESCAN__NOTUSED 3
774#define BTRFS_QUOTA_CTL_ENABLE_SIMPLE_QUOTA 4
775struct btrfs_ioctl_quota_ctl_args {
776 __u64 cmd;
777 __u64 status;
778};
779
780struct btrfs_ioctl_quota_rescan_args {
781 __u64 flags;
782 __u64 progress;
783 __u64 reserved[6];
784};
785
786struct btrfs_ioctl_qgroup_assign_args {
787 __u64 assign;
788 __u64 src;
789 __u64 dst;
790};
791
792struct btrfs_ioctl_qgroup_create_args {
793 __u64 create;
794 __u64 qgroupid;
795};
796struct btrfs_ioctl_timespec {
797 __u64 sec;
798 __u32 nsec;
799};
800
801struct btrfs_ioctl_received_subvol_args {
802 char uuid[BTRFS_UUID_SIZE]; /* in */
803 __u64 stransid; /* in */
804 __u64 rtransid; /* out */
805 struct btrfs_ioctl_timespec stime; /* in */
806 struct btrfs_ioctl_timespec rtime; /* out */
807 __u64 flags; /* in */
808 __u64 reserved[16]; /* in */
809};
810
811/*
812 * Caller doesn't want file data in the send stream, even if the
813 * search of clone sources doesn't find an extent. UPDATE_EXTENT
814 * commands will be sent instead of WRITE commands.
815 */
816#define BTRFS_SEND_FLAG_NO_FILE_DATA 0x1
817
818/*
819 * Do not add the leading stream header. Used when multiple snapshots
820 * are sent back to back.
821 */
822#define BTRFS_SEND_FLAG_OMIT_STREAM_HEADER 0x2
823
824/*
825 * Omit the command at the end of the stream that indicated the end
826 * of the stream. This option is used when multiple snapshots are
827 * sent back to back.
828 */
829#define BTRFS_SEND_FLAG_OMIT_END_CMD 0x4
830
831/*
832 * Read the protocol version in the structure
833 */
834#define BTRFS_SEND_FLAG_VERSION 0x8
835
836/*
837 * Send compressed data using the ENCODED_WRITE command instead of decompressing
838 * the data and sending it with the WRITE command. This requires protocol
839 * version >= 2.
840 */
841#define BTRFS_SEND_FLAG_COMPRESSED 0x10
842
843#define BTRFS_SEND_FLAG_MASK \
844 (BTRFS_SEND_FLAG_NO_FILE_DATA | \
845 BTRFS_SEND_FLAG_OMIT_STREAM_HEADER | \
846 BTRFS_SEND_FLAG_OMIT_END_CMD | \
847 BTRFS_SEND_FLAG_VERSION | \
848 BTRFS_SEND_FLAG_COMPRESSED)
849
850struct btrfs_ioctl_send_args {
851 __s64 send_fd; /* in */
852 __u64 clone_sources_count; /* in */
853 __u64 *clone_sources; /* in */
854 __u64 parent_root; /* in */
855 __u64 flags; /* in */
856 __u32 version; /* in */
857 __u8 reserved[28]; /* in */
858};
859
860/*
861 * Information about a fs tree root.
862 *
863 * All items are filled by the ioctl
864 */
865struct btrfs_ioctl_get_subvol_info_args {
866 /* Id of this subvolume */
867 __u64 treeid;
868
869 /* Name of this subvolume, used to get the real name at mount point */
870 char name[BTRFS_VOL_NAME_MAX + 1];
871
872 /*
873 * Id of the subvolume which contains this subvolume.
874 * Zero for top-level subvolume or a deleted subvolume.
875 */
876 __u64 parent_id;
877
878 /*
879 * Inode number of the directory which contains this subvolume.
880 * Zero for top-level subvolume or a deleted subvolume
881 */
882 __u64 dirid;
883
884 /* Latest transaction id of this subvolume */
885 __u64 generation;
886
887 /* Flags of this subvolume */
888 __u64 flags;
889
890 /* UUID of this subvolume */
891 __u8 uuid[BTRFS_UUID_SIZE];
892
893 /*
894 * UUID of the subvolume of which this subvolume is a snapshot.
895 * All zero for a non-snapshot subvolume.
896 */
897 __u8 parent_uuid[BTRFS_UUID_SIZE];
898
899 /*
900 * UUID of the subvolume from which this subvolume was received.
901 * All zero for non-received subvolume.
902 */
903 __u8 received_uuid[BTRFS_UUID_SIZE];
904
905 /* Transaction id indicating when change/create/send/receive happened */
906 __u64 ctransid;
907 __u64 otransid;
908 __u64 stransid;
909 __u64 rtransid;
910 /* Time corresponding to c/o/s/rtransid */
911 struct btrfs_ioctl_timespec ctime;
912 struct btrfs_ioctl_timespec otime;
913 struct btrfs_ioctl_timespec stime;
914 struct btrfs_ioctl_timespec rtime;
915
916 /* Must be zero */
917 __u64 reserved[8];
918};
919
920#define BTRFS_MAX_ROOTREF_BUFFER_NUM 255
921struct btrfs_ioctl_get_subvol_rootref_args {
922 /* in/out, minimum id of rootref's treeid to be searched */
923 __u64 min_treeid;
924
925 /* out */
926 struct {
927 __u64 treeid;
928 __u64 dirid;
929 } rootref[BTRFS_MAX_ROOTREF_BUFFER_NUM];
930
931 /* out, number of found items */
932 __u8 num_items;
933 __u8 align[7];
934};
935
936/*
937 * Data and metadata for an encoded read or write.
938 *
939 * Encoded I/O bypasses any encoding automatically done by the filesystem (e.g.,
940 * compression). This can be used to read the compressed contents of a file or
941 * write pre-compressed data directly to a file.
942 *
943 * BTRFS_IOC_ENCODED_READ and BTRFS_IOC_ENCODED_WRITE are essentially
944 * preadv/pwritev with additional metadata about how the data is encoded and the
945 * size of the unencoded data.
946 *
947 * BTRFS_IOC_ENCODED_READ fills the given iovecs with the encoded data, fills
948 * the metadata fields, and returns the size of the encoded data. It reads one
949 * extent per call. It can also read data which is not encoded.
950 *
951 * BTRFS_IOC_ENCODED_WRITE uses the metadata fields, writes the encoded data
952 * from the iovecs, and returns the size of the encoded data. Note that the
953 * encoded data is not validated when it is written; if it is not valid (e.g.,
954 * it cannot be decompressed), then a subsequent read may return an error.
955 *
956 * Since the filesystem page cache contains decoded data, encoded I/O bypasses
957 * the page cache. Encoded I/O requires CAP_SYS_ADMIN.
958 */
959struct btrfs_ioctl_encoded_io_args {
960 /* Input parameters for both reads and writes. */
961
962 /*
963 * iovecs containing encoded data.
964 *
965 * For reads, if the size of the encoded data is larger than the sum of
966 * iov[n].iov_len for 0 <= n < iovcnt, then the ioctl fails with
967 * ENOBUFS.
968 *
969 * For writes, the size of the encoded data is the sum of iov[n].iov_len
970 * for 0 <= n < iovcnt. This must be less than 128 KiB (this limit may
971 * increase in the future). This must also be less than or equal to
972 * unencoded_len.
973 */
974 const struct iovec *iov;
975 /* Number of iovecs. */
976 unsigned long iovcnt;
977 /*
978 * Offset in file.
979 *
980 * For writes, must be aligned to the sector size of the filesystem.
981 */
982 __s64 offset;
983 /* Currently must be zero. */
984 __u64 flags;
985
986 /*
987 * For reads, the following members are output parameters that will
988 * contain the returned metadata for the encoded data.
989 * For writes, the following members must be set to the metadata for the
990 * encoded data.
991 */
992
993 /*
994 * Length of the data in the file.
995 *
996 * Must be less than or equal to unencoded_len - unencoded_offset. For
997 * writes, must be aligned to the sector size of the filesystem unless
998 * the data ends at or beyond the current end of the file.
999 */
1000 __u64 len;
1001 /*
1002 * Length of the unencoded (i.e., decrypted and decompressed) data.
1003 *
1004 * For writes, must be no more than 128 KiB (this limit may increase in
1005 * the future). If the unencoded data is actually longer than
1006 * unencoded_len, then it is truncated; if it is shorter, then it is
1007 * extended with zeroes.
1008 */
1009 __u64 unencoded_len;
1010 /*
1011 * Offset from the first byte of the unencoded data to the first byte of
1012 * logical data in the file.
1013 *
1014 * Must be less than unencoded_len.
1015 */
1016 __u64 unencoded_offset;
1017 /*
1018 * BTRFS_ENCODED_IO_COMPRESSION_* type.
1019 *
1020 * For writes, must not be BTRFS_ENCODED_IO_COMPRESSION_NONE.
1021 */
1022 __u32 compression;
1023 /* Currently always BTRFS_ENCODED_IO_ENCRYPTION_NONE. */
1024 __u32 encryption;
1025 /*
1026 * Reserved for future expansion.
1027 *
1028 * For reads, always returned as zero. Users should check for non-zero
1029 * bytes. If there are any, then the kernel has a newer version of this
1030 * structure with additional information that the user definition is
1031 * missing.
1032 *
1033 * For writes, must be zeroed.
1034 */
1035 __u8 reserved[64];
1036};
1037
1038/* Data is not compressed. */
1039#define BTRFS_ENCODED_IO_COMPRESSION_NONE 0
1040/* Data is compressed as a single zlib stream. */
1041#define BTRFS_ENCODED_IO_COMPRESSION_ZLIB 1
1042/*
1043 * Data is compressed as a single zstd frame with the windowLog compression
1044 * parameter set to no more than 17.
1045 */
1046#define BTRFS_ENCODED_IO_COMPRESSION_ZSTD 2
1047/*
1048 * Data is compressed sector by sector (using the sector size indicated by the
1049 * name of the constant) with LZO1X and wrapped in the format documented in
1050 * fs/btrfs/lzo.c. For writes, the compression sector size must match the
1051 * filesystem sector size.
1052 */
1053#define BTRFS_ENCODED_IO_COMPRESSION_LZO_4K 3
1054#define BTRFS_ENCODED_IO_COMPRESSION_LZO_8K 4
1055#define BTRFS_ENCODED_IO_COMPRESSION_LZO_16K 5
1056#define BTRFS_ENCODED_IO_COMPRESSION_LZO_32K 6
1057#define BTRFS_ENCODED_IO_COMPRESSION_LZO_64K 7
1058#define BTRFS_ENCODED_IO_COMPRESSION_TYPES 8
1059
1060/* Data is not encrypted. */
1061#define BTRFS_ENCODED_IO_ENCRYPTION_NONE 0
1062#define BTRFS_ENCODED_IO_ENCRYPTION_TYPES 1
1063
1064/*
1065 * Wait for subvolume cleaning process. This queries the kernel queue and it
1066 * can change between the calls.
1067 *
1068 * - FOR_ONE - specify the subvolid
1069 * - FOR_QUEUED - wait for all currently queued
1070 * - COUNT - count number of queued
1071 * - PEEK_FIRST - read which is the first in the queue (to be cleaned or being
1072 * cleaned already), or 0 if the queue is empty
1073 * - PEEK_LAST - read the last subvolid in the queue, or 0 if the queue is empty
1074 */
1075struct btrfs_ioctl_subvol_wait {
1076 __u64 subvolid;
1077 __u32 mode;
1078 __u32 count;
1079};
1080
1081#define BTRFS_SUBVOL_SYNC_WAIT_FOR_ONE (0)
1082#define BTRFS_SUBVOL_SYNC_WAIT_FOR_QUEUED (1)
1083#define BTRFS_SUBVOL_SYNC_COUNT (2)
1084#define BTRFS_SUBVOL_SYNC_PEEK_FIRST (3)
1085#define BTRFS_SUBVOL_SYNC_PEEK_LAST (4)
1086
1087/* Error codes as returned by the kernel */
1088enum btrfs_err_code {
1089 BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET = 1,
1090 BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET,
1091 BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET,
1092 BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET,
1093 BTRFS_ERROR_DEV_TGT_REPLACE,
1094 BTRFS_ERROR_DEV_MISSING_NOT_FOUND,
1095 BTRFS_ERROR_DEV_ONLY_WRITABLE,
1096 BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS,
1097 BTRFS_ERROR_DEV_RAID1C3_MIN_NOT_MET,
1098 BTRFS_ERROR_DEV_RAID1C4_MIN_NOT_MET,
1099};
1100
1101/* Flags for struct btrfs_ioctl_get_csums_entry::type. */
1102#define BTRFS_GET_CSUMS_HAS_CSUMS (1U << 0)
1103#define BTRFS_GET_CSUMS_ZEROED (1U << 1)
1104#define BTRFS_GET_CSUMS_NODATASUM (1U << 2)
1105#define BTRFS_GET_CSUMS_COMPRESSED (1U << 3)
1106#define BTRFS_GET_CSUMS_ENCRYPTED (1U << 4)
1107#define BTRFS_GET_CSUMS_INLINE (1U << 5)
1108
1109struct btrfs_ioctl_get_csums_entry {
1110 /* File offset of this range. */
1111 __u64 offset;
1112 /* Length in bytes. */
1113 __u64 length;
1114 /* One of BTRFS_GET_CSUMS_* types. */
1115 __u32 type;
1116 /* Padding, must be 0. */
1117 __u32 reserved;
1118};
1119
1120struct btrfs_ioctl_get_csums_args {
1121 /* In/out: file offset in bytes. */
1122 __u64 offset;
1123 /* In/out: range length in bytes. */
1124 __u64 length;
1125 /* In/out: buffer capacity / bytes written. */
1126 __u64 buf_size;
1127 /* In: flags, must be 0 for now. */
1128 __u64 flags;
1129 /* Out: entries of type btrfs_ioctl_get_csums_entry + csum data */
1130 __u8 buf[];
1131};
1132
1133/* Flags for IOC_SHUTDOWN, must match XFS_FSOP_GOING_FLAGS_* flags. */
1134#define BTRFS_SHUTDOWN_FLAGS_DEFAULT 0x0
1135#define BTRFS_SHUTDOWN_FLAGS_LOGFLUSH 0x1
1136#define BTRFS_SHUTDOWN_FLAGS_NOLOGFLUSH 0x2
1137#define BTRFS_SHUTDOWN_FLAGS_LAST 0x3
1138
1139#define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
1140 struct btrfs_ioctl_vol_args)
1141#define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
1142 struct btrfs_ioctl_vol_args)
1143#define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
1144 struct btrfs_ioctl_vol_args)
1145#define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
1146 struct btrfs_ioctl_vol_args)
1147#define BTRFS_IOC_FORGET_DEV _IOW(BTRFS_IOCTL_MAGIC, 5, \
1148 struct btrfs_ioctl_vol_args)
1149/* trans start and trans end are dangerous, and only for
1150 * use by applications that know how to avoid the
1151 * resulting deadlocks
1152 */
1153#define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6)
1154#define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7)
1155#define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8)
1156
1157#define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
1158#define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
1159 struct btrfs_ioctl_vol_args)
1160#define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
1161 struct btrfs_ioctl_vol_args)
1162#define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
1163 struct btrfs_ioctl_vol_args)
1164
1165#define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
1166 struct btrfs_ioctl_clone_range_args)
1167
1168#define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
1169 struct btrfs_ioctl_vol_args)
1170#define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
1171 struct btrfs_ioctl_vol_args)
1172#define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
1173 struct btrfs_ioctl_defrag_range_args)
1174#define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
1175 struct btrfs_ioctl_search_args)
1176#define BTRFS_IOC_TREE_SEARCH_V2 _IOWR(BTRFS_IOCTL_MAGIC, 17, \
1177 struct btrfs_ioctl_search_args_v2)
1178#define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
1179 struct btrfs_ioctl_ino_lookup_args)
1180#define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, __u64)
1181#define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
1182 struct btrfs_ioctl_space_args)
1183#define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
1184#define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
1185#define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
1186 struct btrfs_ioctl_vol_args_v2)
1187#define BTRFS_IOC_SUBVOL_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 24, \
1188 struct btrfs_ioctl_vol_args_v2)
1189#define BTRFS_IOC_SUBVOL_GETFLAGS _IOR(BTRFS_IOCTL_MAGIC, 25, __u64)
1190#define BTRFS_IOC_SUBVOL_SETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 26, __u64)
1191#define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \
1192 struct btrfs_ioctl_scrub_args)
1193#define BTRFS_IOC_SCRUB_CANCEL _IO(BTRFS_IOCTL_MAGIC, 28)
1194#define BTRFS_IOC_SCRUB_PROGRESS _IOWR(BTRFS_IOCTL_MAGIC, 29, \
1195 struct btrfs_ioctl_scrub_args)
1196#define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \
1197 struct btrfs_ioctl_dev_info_args)
1198#define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \
1199 struct btrfs_ioctl_fs_info_args)
1200#define BTRFS_IOC_BALANCE_V2 _IOWR(BTRFS_IOCTL_MAGIC, 32, \
1201 struct btrfs_ioctl_balance_args)
1202#define BTRFS_IOC_BALANCE_CTL _IOW(BTRFS_IOCTL_MAGIC, 33, int)
1203#define BTRFS_IOC_BALANCE_PROGRESS _IOR(BTRFS_IOCTL_MAGIC, 34, \
1204 struct btrfs_ioctl_balance_args)
1205#define BTRFS_IOC_INO_PATHS _IOWR(BTRFS_IOCTL_MAGIC, 35, \
1206 struct btrfs_ioctl_ino_path_args)
1207#define BTRFS_IOC_LOGICAL_INO _IOWR(BTRFS_IOCTL_MAGIC, 36, \
1208 struct btrfs_ioctl_logical_ino_args)
1209#define BTRFS_IOC_SET_RECEIVED_SUBVOL _IOWR(BTRFS_IOCTL_MAGIC, 37, \
1210 struct btrfs_ioctl_received_subvol_args)
1211#define BTRFS_IOC_SEND _IOW(BTRFS_IOCTL_MAGIC, 38, struct btrfs_ioctl_send_args)
1212#define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \
1213 struct btrfs_ioctl_vol_args)
1214#define BTRFS_IOC_QUOTA_CTL _IOWR(BTRFS_IOCTL_MAGIC, 40, \
1215 struct btrfs_ioctl_quota_ctl_args)
1216#define BTRFS_IOC_QGROUP_ASSIGN _IOW(BTRFS_IOCTL_MAGIC, 41, \
1217 struct btrfs_ioctl_qgroup_assign_args)
1218#define BTRFS_IOC_QGROUP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 42, \
1219 struct btrfs_ioctl_qgroup_create_args)
1220#define BTRFS_IOC_QGROUP_LIMIT _IOR(BTRFS_IOCTL_MAGIC, 43, \
1221 struct btrfs_ioctl_qgroup_limit_args)
1222#define BTRFS_IOC_QUOTA_RESCAN _IOW(BTRFS_IOCTL_MAGIC, 44, \
1223 struct btrfs_ioctl_quota_rescan_args)
1224#define BTRFS_IOC_QUOTA_RESCAN_STATUS _IOR(BTRFS_IOCTL_MAGIC, 45, \
1225 struct btrfs_ioctl_quota_rescan_args)
1226#define BTRFS_IOC_QUOTA_RESCAN_WAIT _IO(BTRFS_IOCTL_MAGIC, 46)
1227#define BTRFS_IOC_GET_FSLABEL FS_IOC_GETFSLABEL
1228#define BTRFS_IOC_SET_FSLABEL FS_IOC_SETFSLABEL
1229#define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \
1230 struct btrfs_ioctl_get_dev_stats)
1231#define BTRFS_IOC_DEV_REPLACE _IOWR(BTRFS_IOCTL_MAGIC, 53, \
1232 struct btrfs_ioctl_dev_replace_args)
1233#define BTRFS_IOC_FILE_EXTENT_SAME _IOWR(BTRFS_IOCTL_MAGIC, 54, \
1234 struct btrfs_ioctl_same_args)
1235#define BTRFS_IOC_GET_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
1236 struct btrfs_ioctl_feature_flags)
1237#define BTRFS_IOC_SET_FEATURES _IOW(BTRFS_IOCTL_MAGIC, 57, \
1238 struct btrfs_ioctl_feature_flags[2])
1239#define BTRFS_IOC_GET_SUPPORTED_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
1240 struct btrfs_ioctl_feature_flags[3])
1241#define BTRFS_IOC_RM_DEV_V2 _IOW(BTRFS_IOCTL_MAGIC, 58, \
1242 struct btrfs_ioctl_vol_args_v2)
1243#define BTRFS_IOC_LOGICAL_INO_V2 _IOWR(BTRFS_IOCTL_MAGIC, 59, \
1244 struct btrfs_ioctl_logical_ino_args)
1245#define BTRFS_IOC_GET_SUBVOL_INFO _IOR(BTRFS_IOCTL_MAGIC, 60, \
1246 struct btrfs_ioctl_get_subvol_info_args)
1247#define BTRFS_IOC_GET_SUBVOL_ROOTREF _IOWR(BTRFS_IOCTL_MAGIC, 61, \
1248 struct btrfs_ioctl_get_subvol_rootref_args)
1249#define BTRFS_IOC_INO_LOOKUP_USER _IOWR(BTRFS_IOCTL_MAGIC, 62, \
1250 struct btrfs_ioctl_ino_lookup_user_args)
1251#define BTRFS_IOC_SNAP_DESTROY_V2 _IOW(BTRFS_IOCTL_MAGIC, 63, \
1252 struct btrfs_ioctl_vol_args_v2)
1253#define BTRFS_IOC_ENCODED_READ _IOR(BTRFS_IOCTL_MAGIC, 64, \
1254 struct btrfs_ioctl_encoded_io_args)
1255#define BTRFS_IOC_ENCODED_WRITE _IOW(BTRFS_IOCTL_MAGIC, 64, \
1256 struct btrfs_ioctl_encoded_io_args)
1257#define BTRFS_IOC_SUBVOL_SYNC_WAIT _IOW(BTRFS_IOCTL_MAGIC, 65, \
1258 struct btrfs_ioctl_subvol_wait)
1259#define BTRFS_IOC_GET_CSUMS _IOWR(BTRFS_IOCTL_MAGIC, 66, \
1260 struct btrfs_ioctl_get_csums_args)
1261
1262/* Shutdown ioctl should follow XFS's interfaces, thus not using btrfs magic. */
1263#define BTRFS_IOC_SHUTDOWN _IOR('X', 125, __u32)
1264
1265#ifdef __cplusplus
1266}
1267#endif
1268
1269#endif /* _LINUX_BTRFS_H */