1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
3 * Copyright (C) 2007 Oracle. All rights reserved.
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.
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.
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.
20 #ifndef _UAPI_LINUX_BTRFS_H
21 #define _UAPI_LINUX_BTRFS_H
22 #include <linux/types.h>
23 #include <linux/ioctl.h>
25 #define BTRFS_IOCTL_MAGIC 0x94
26 #define BTRFS_VOL_NAME_MAX 255
27 #define BTRFS_LABEL_SIZE 256
29 /* this should be 4k */
30 #define BTRFS_PATH_NAME_MAX 4087
31 struct btrfs_ioctl_vol_args {
33 char name[BTRFS_PATH_NAME_MAX + 1];
36 #define BTRFS_DEVICE_PATH_NAME_MAX 1024
37 #define BTRFS_SUBVOL_NAME_MAX 4039
40 /* Deprecated since 5.7 */
41 # define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)
43 #define BTRFS_SUBVOL_RDONLY (1ULL << 1)
44 #define BTRFS_SUBVOL_QGROUP_INHERIT (1ULL << 2)
46 #define BTRFS_DEVICE_SPEC_BY_ID (1ULL << 3)
48 #define BTRFS_SUBVOL_SPEC_BY_ID (1ULL << 4)
50 #define BTRFS_VOL_ARG_V2_FLAGS_SUPPORTED \
51 (BTRFS_SUBVOL_RDONLY | \
52 BTRFS_SUBVOL_QGROUP_INHERIT | \
53 BTRFS_DEVICE_SPEC_BY_ID | \
54 BTRFS_SUBVOL_SPEC_BY_ID)
56 #define BTRFS_FSID_SIZE 16
57 #define BTRFS_UUID_SIZE 16
58 #define BTRFS_UUID_UNPARSED_SIZE 37
61 * flags definition for qgroup limits
64 * struct btrfs_qgroup_limit.flags
65 * struct btrfs_qgroup_limit_item.flags
67 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
68 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
69 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
70 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
71 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
72 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
74 struct btrfs_qgroup_limit {
83 * flags definition for qgroup inheritance
86 * struct btrfs_qgroup_inherit.flags
88 #define BTRFS_QGROUP_INHERIT_SET_LIMITS (1ULL << 0)
90 struct btrfs_qgroup_inherit {
94 __u64 num_excl_copies;
95 struct btrfs_qgroup_limit lim;
99 struct btrfs_ioctl_qgroup_limit_args {
101 struct btrfs_qgroup_limit lim;
105 * Arguments for specification of subvolumes or devices, supporting by-name or
108 * The set of supported flags depends on the ioctl
110 * BTRFS_SUBVOL_RDONLY is also provided/consumed by the following ioctls:
111 * - BTRFS_IOC_SUBVOL_GETFLAGS
112 * - BTRFS_IOC_SUBVOL_SETFLAGS
115 /* Supported flags for BTRFS_IOC_RM_DEV_V2 */
116 #define BTRFS_DEVICE_REMOVE_ARGS_MASK \
117 (BTRFS_DEVICE_SPEC_BY_ID)
119 /* Supported flags for BTRFS_IOC_SNAP_CREATE_V2 and BTRFS_IOC_SUBVOL_CREATE_V2 */
120 #define BTRFS_SUBVOL_CREATE_ARGS_MASK \
121 (BTRFS_SUBVOL_RDONLY | \
122 BTRFS_SUBVOL_QGROUP_INHERIT)
124 /* Supported flags for BTRFS_IOC_SNAP_DESTROY_V2 */
125 #define BTRFS_SUBVOL_DELETE_ARGS_MASK \
126 (BTRFS_SUBVOL_SPEC_BY_ID)
128 struct btrfs_ioctl_vol_args_v2 {
135 struct btrfs_qgroup_inherit __user *qgroup_inherit;
140 char name[BTRFS_SUBVOL_NAME_MAX + 1];
147 * structure to report errors and progress to userspace, either as a
148 * result of a finished scrub, a canceled scrub or a progress inquiry
150 struct btrfs_scrub_progress {
151 __u64 data_extents_scrubbed; /* # of data extents scrubbed */
152 __u64 tree_extents_scrubbed; /* # of tree extents scrubbed */
153 __u64 data_bytes_scrubbed; /* # of data bytes scrubbed */
154 __u64 tree_bytes_scrubbed; /* # of tree bytes scrubbed */
155 __u64 read_errors; /* # of read errors encountered (EIO) */
156 __u64 csum_errors; /* # of failed csum checks */
157 __u64 verify_errors; /* # of occurences, where the metadata
158 * of a tree block did not match the
159 * expected values, like generation or
161 __u64 no_csum; /* # of 4k data block for which no csum
162 * is present, probably the result of
163 * data written with nodatasum */
164 __u64 csum_discards; /* # of csum for which no data was found
165 * in the extent tree. */
166 __u64 super_errors; /* # of bad super blocks encountered */
167 __u64 malloc_errors; /* # of internal kmalloc errors. These
168 * will likely cause an incomplete
170 __u64 uncorrectable_errors; /* # of errors where either no intact
171 * copy was found or the writeback
173 __u64 corrected_errors; /* # of errors corrected */
174 __u64 last_physical; /* last physical address scrubbed. In
175 * case a scrub was aborted, this can
176 * be used to restart the scrub */
177 __u64 unverified_errors; /* # of occurences where a read for a
178 * full (64k) bio failed, but the re-
179 * check succeeded for each 4k piece.
180 * Intermittent error. */
183 #define BTRFS_SCRUB_READONLY 1
184 struct btrfs_ioctl_scrub_args {
185 __u64 devid; /* in */
186 __u64 start; /* in */
188 __u64 flags; /* in */
189 struct btrfs_scrub_progress progress; /* out */
191 __u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8];
194 #define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
195 #define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
196 struct btrfs_ioctl_dev_replace_start_params {
197 __u64 srcdevid; /* in, if 0, use srcdev_name instead */
198 __u64 cont_reading_from_srcdev_mode; /* in, see #define
200 __u8 srcdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */
201 __u8 tgtdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */
204 #define BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED 0
205 #define BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED 1
206 #define BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED 2
207 #define BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED 3
208 #define BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED 4
209 struct btrfs_ioctl_dev_replace_status_params {
210 __u64 replace_state; /* out, see #define above */
211 __u64 progress_1000; /* out, 0 <= x <= 1000 */
212 __u64 time_started; /* out, seconds since 1-Jan-1970 */
213 __u64 time_stopped; /* out, seconds since 1-Jan-1970 */
214 __u64 num_write_errors; /* out */
215 __u64 num_uncorrectable_read_errors; /* out */
218 #define BTRFS_IOCTL_DEV_REPLACE_CMD_START 0
219 #define BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS 1
220 #define BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL 2
221 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR 0
222 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED 1
223 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_ALREADY_STARTED 2
224 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_SCRUB_INPROGRESS 3
225 struct btrfs_ioctl_dev_replace_args {
227 __u64 result; /* out */
230 struct btrfs_ioctl_dev_replace_start_params start;
231 struct btrfs_ioctl_dev_replace_status_params status;
237 struct btrfs_ioctl_dev_info_args {
238 __u64 devid; /* in/out */
239 __u8 uuid[BTRFS_UUID_SIZE]; /* in/out */
240 __u64 bytes_used; /* out */
241 __u64 total_bytes; /* out */
242 __u64 unused[379]; /* pad to 4k */
243 __u8 path[BTRFS_DEVICE_PATH_NAME_MAX]; /* out */
247 * Retrieve information about the filesystem
250 /* Request information about checksum type and size */
251 #define BTRFS_FS_INFO_FLAG_CSUM_INFO (1 << 0)
253 /* Request information about filesystem generation */
254 #define BTRFS_FS_INFO_FLAG_GENERATION (1 << 1)
255 /* Request information about filesystem metadata UUID */
256 #define BTRFS_FS_INFO_FLAG_METADATA_UUID (1 << 2)
258 struct btrfs_ioctl_fs_info_args {
259 __u64 max_id; /* out */
260 __u64 num_devices; /* out */
261 __u8 fsid[BTRFS_FSID_SIZE]; /* out */
262 __u32 nodesize; /* out */
263 __u32 sectorsize; /* out */
264 __u32 clone_alignment; /* out */
265 /* See BTRFS_FS_INFO_FLAG_* */
266 __u16 csum_type; /* out */
267 __u16 csum_size; /* out */
268 __u64 flags; /* in/out */
269 __u64 generation; /* out */
270 __u8 metadata_uuid[BTRFS_FSID_SIZE]; /* out */
271 __u8 reserved[944]; /* pad to 1k */
278 * struct btrfs_ioctl_feature_flags
280 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
282 * Older kernels (< 4.9) on big-endian systems produced broken free space tree
283 * bitmaps, and btrfs-progs also used to corrupt the free space tree (versions
284 * < 4.7.3). If this bit is clear, then the free space tree cannot be trusted.
285 * btrfs-progs can also intentionally clear this bit to ask the kernel to
286 * rebuild the free space tree, however this might not work on older kernels
287 * that do not know about this bit. If not sure, clear the cache manually on
288 * first mount when booting older kernel versions.
290 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)
292 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
293 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
294 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
295 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
296 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD (1ULL << 4)
299 * older kernels tried to do bigger metadata blocks, but the
300 * code was pretty buggy. Lets not let them try anymore.
302 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
304 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
305 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
306 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
307 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
308 #define BTRFS_FEATURE_INCOMPAT_METADATA_UUID (1ULL << 10)
309 #define BTRFS_FEATURE_INCOMPAT_RAID1C34 (1ULL << 11)
311 struct btrfs_ioctl_feature_flags {
313 __u64 compat_ro_flags;
314 __u64 incompat_flags;
317 /* balance control ioctl modes */
318 #define BTRFS_BALANCE_CTL_PAUSE 1
319 #define BTRFS_BALANCE_CTL_CANCEL 2
322 * this is packed, because it should be exactly the same as its disk
323 * byte order counterpart (struct btrfs_disk_balance_args)
325 struct btrfs_balance_args {
345 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
346 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
350 __u64 limit; /* limit number of processed chunks */
358 * Process chunks that cross stripes_min..stripes_max devices,
359 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
365 } __attribute__ ((__packed__));
367 /* report balance progress to userspace */
368 struct btrfs_balance_progress {
369 __u64 expected; /* estimated # of chunks that will be
370 * relocated to fulfill the request */
371 __u64 considered; /* # of chunks we have considered so far */
372 __u64 completed; /* # of chunks relocated so far */
376 * flags definition for balance
378 * Restriper's general type filter
381 * btrfs_ioctl_balance_args.flags
382 * btrfs_balance_control.flags (internal)
384 #define BTRFS_BALANCE_DATA (1ULL << 0)
385 #define BTRFS_BALANCE_SYSTEM (1ULL << 1)
386 #define BTRFS_BALANCE_METADATA (1ULL << 2)
388 #define BTRFS_BALANCE_TYPE_MASK (BTRFS_BALANCE_DATA | \
389 BTRFS_BALANCE_SYSTEM | \
390 BTRFS_BALANCE_METADATA)
392 #define BTRFS_BALANCE_FORCE (1ULL << 3)
393 #define BTRFS_BALANCE_RESUME (1ULL << 4)
396 * flags definitions for per-type balance args
401 * struct btrfs_balance_args
403 #define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0)
404 #define BTRFS_BALANCE_ARGS_USAGE (1ULL << 1)
405 #define BTRFS_BALANCE_ARGS_DEVID (1ULL << 2)
406 #define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3)
407 #define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4)
408 #define BTRFS_BALANCE_ARGS_LIMIT (1ULL << 5)
409 #define BTRFS_BALANCE_ARGS_LIMIT_RANGE (1ULL << 6)
410 #define BTRFS_BALANCE_ARGS_STRIPES_RANGE (1ULL << 7)
411 #define BTRFS_BALANCE_ARGS_USAGE_RANGE (1ULL << 10)
413 #define BTRFS_BALANCE_ARGS_MASK \
414 (BTRFS_BALANCE_ARGS_PROFILES | \
415 BTRFS_BALANCE_ARGS_USAGE | \
416 BTRFS_BALANCE_ARGS_DEVID | \
417 BTRFS_BALANCE_ARGS_DRANGE | \
418 BTRFS_BALANCE_ARGS_VRANGE | \
419 BTRFS_BALANCE_ARGS_LIMIT | \
420 BTRFS_BALANCE_ARGS_LIMIT_RANGE | \
421 BTRFS_BALANCE_ARGS_STRIPES_RANGE | \
422 BTRFS_BALANCE_ARGS_USAGE_RANGE)
425 * Profile changing flags. When SOFT is set we won't relocate chunk if
426 * it already has the target profile (even though it may be
429 #define BTRFS_BALANCE_ARGS_CONVERT (1ULL << 8)
430 #define BTRFS_BALANCE_ARGS_SOFT (1ULL << 9)
434 * flags definition for balance state
437 * struct btrfs_ioctl_balance_args.state
439 #define BTRFS_BALANCE_STATE_RUNNING (1ULL << 0)
440 #define BTRFS_BALANCE_STATE_PAUSE_REQ (1ULL << 1)
441 #define BTRFS_BALANCE_STATE_CANCEL_REQ (1ULL << 2)
443 struct btrfs_ioctl_balance_args {
444 __u64 flags; /* in/out */
445 __u64 state; /* out */
447 struct btrfs_balance_args data; /* in/out */
448 struct btrfs_balance_args meta; /* in/out */
449 struct btrfs_balance_args sys; /* in/out */
451 struct btrfs_balance_progress stat; /* out */
453 __u64 unused[72]; /* pad to 1k */
456 #define BTRFS_INO_LOOKUP_PATH_MAX 4080
457 struct btrfs_ioctl_ino_lookup_args {
460 char name[BTRFS_INO_LOOKUP_PATH_MAX];
463 #define BTRFS_INO_LOOKUP_USER_PATH_MAX (4080 - BTRFS_VOL_NAME_MAX - 1)
464 struct btrfs_ioctl_ino_lookup_user_args {
465 /* in, inode number containing the subvolume of 'subvolid' */
469 /* out, name of the subvolume of 'treeid' */
470 char name[BTRFS_VOL_NAME_MAX + 1];
472 * out, constructed path from the directory with which the ioctl is
475 char path[BTRFS_INO_LOOKUP_USER_PATH_MAX];
478 /* Search criteria for the btrfs SEARCH ioctl family. */
479 struct btrfs_ioctl_search_key {
481 * The tree we're searching in. 1 is the tree of tree roots, 2 is the
482 * extent tree, etc...
484 * A special tree_id value of 0 will cause a search in the subvolume
485 * tree that the inode which is passed to the ioctl is part of.
487 __u64 tree_id; /* in */
490 * When doing a tree search, we're actually taking a slice from a
491 * linear search space of 136-bit keys.
493 * A full 136-bit tree key is composed as:
494 * (objectid << 72) + (type << 64) + offset
496 * The individual min and max values for objectid, type and offset
497 * define the min_key and max_key values for the search range. All
498 * metadata items with a key in the interval [min_key, max_key] will be
501 * Additionally, we can filter the items returned on transaction id of
502 * the metadata block they're stored in by specifying a transid range.
503 * Be aware that this transaction id only denotes when the metadata
504 * page that currently contains the item got written the last time as
505 * result of a COW operation. The number does not have any meaning
506 * related to the transaction in which an individual item that is being
507 * returned was created or changed.
509 __u64 min_objectid; /* in */
510 __u64 max_objectid; /* in */
511 __u64 min_offset; /* in */
512 __u64 max_offset; /* in */
513 __u64 min_transid; /* in */
514 __u64 max_transid; /* in */
515 __u32 min_type; /* in */
516 __u32 max_type; /* in */
519 * input: The maximum amount of results desired.
520 * output: The actual amount of items returned, restricted by any of:
521 * - reaching the upper bound of the search range
522 * - reaching the input nr_items amount of items
523 * - completely filling the supplied memory buffer
525 __u32 nr_items; /* in/out */
527 /* align to 64 bits */
530 /* some extra for later */
537 struct btrfs_ioctl_search_header {
545 #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
547 * the buf is an array of search headers where
548 * each header is followed by the actual item
549 * the type field is expanded to 32 bits for alignment
551 struct btrfs_ioctl_search_args {
552 struct btrfs_ioctl_search_key key;
553 char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
556 struct btrfs_ioctl_search_args_v2 {
557 struct btrfs_ioctl_search_key key; /* in/out - search parameters */
558 __u64 buf_size; /* in - size of buffer
559 * out - on EOVERFLOW: needed size
561 __u64 buf[0]; /* out - found items */
564 struct btrfs_ioctl_clone_range_args {
566 __u64 src_offset, src_length;
571 * flags definition for the defrag range ioctl
574 * struct btrfs_ioctl_defrag_range_args.flags
576 #define BTRFS_DEFRAG_RANGE_COMPRESS 1
577 #define BTRFS_DEFRAG_RANGE_START_IO 2
578 struct btrfs_ioctl_defrag_range_args {
579 /* start of the defrag operation */
582 /* number of bytes to defrag, use (u64)-1 to say all */
586 * flags for the operation, which can include turning
587 * on compression for this one defrag
592 * any extent bigger than this will be considered
593 * already defragged. Use 0 to take the kernel default
594 * Use 1 to say every single extent must be rewritten
599 * which compression method to use if turning on compression
600 * for this defrag operation. If unspecified, zlib will
605 /* spare for later */
610 #define BTRFS_SAME_DATA_DIFFERS 1
611 /* For extent-same ioctl */
612 struct btrfs_ioctl_same_extent_info {
613 __s64 fd; /* in - destination file */
614 __u64 logical_offset; /* in - start of extent in destination */
615 __u64 bytes_deduped; /* out - total # of bytes we were able
616 * to dedupe from this file */
617 /* status of this dedupe operation:
618 * 0 if dedup succeeds
620 * == BTRFS_SAME_DATA_DIFFERS if data differs
622 __s32 status; /* out - see above description */
626 struct btrfs_ioctl_same_args {
627 __u64 logical_offset; /* in - start of extent in source */
628 __u64 length; /* in - length of extent */
629 __u16 dest_count; /* in - total elements in info array */
632 struct btrfs_ioctl_same_extent_info info[0];
635 struct btrfs_ioctl_space_info {
641 struct btrfs_ioctl_space_args {
644 struct btrfs_ioctl_space_info spaces[0];
647 struct btrfs_data_container {
648 __u32 bytes_left; /* out -- bytes not needed to deliver output */
649 __u32 bytes_missing; /* out -- additional bytes needed for result */
650 __u32 elem_cnt; /* out */
651 __u32 elem_missed; /* out */
652 __u64 val[0]; /* out */
655 struct btrfs_ioctl_ino_path_args {
659 /* struct btrfs_data_container *fspath; out */
660 __u64 fspath; /* out */
663 struct btrfs_ioctl_logical_ino_args {
664 __u64 logical; /* in */
666 __u64 reserved[3]; /* must be 0 for now */
667 __u64 flags; /* in, v2 only */
668 /* struct btrfs_data_container *inodes; out */
671 /* Return every ref to the extent, not just those containing logical block.
672 * Requires logical == extent bytenr. */
673 #define BTRFS_LOGICAL_INO_ARGS_IGNORE_OFFSET (1ULL << 0)
675 enum btrfs_dev_stat_values {
676 /* disk I/O failure stats */
677 BTRFS_DEV_STAT_WRITE_ERRS, /* EIO or EREMOTEIO from lower layers */
678 BTRFS_DEV_STAT_READ_ERRS, /* EIO or EREMOTEIO from lower layers */
679 BTRFS_DEV_STAT_FLUSH_ERRS, /* EIO or EREMOTEIO from lower layers */
681 /* stats for indirect indications for I/O failures */
682 BTRFS_DEV_STAT_CORRUPTION_ERRS, /* checksum error, bytenr error or
683 * contents is illegal: this is an
684 * indication that the block was damaged
685 * during read or write, or written to
686 * wrong location or read from wrong
688 BTRFS_DEV_STAT_GENERATION_ERRS, /* an indication that blocks have not
691 BTRFS_DEV_STAT_VALUES_MAX
694 /* Reset statistics after reading; needs SYS_ADMIN capability */
695 #define BTRFS_DEV_STATS_RESET (1ULL << 0)
697 struct btrfs_ioctl_get_dev_stats {
698 __u64 devid; /* in */
699 __u64 nr_items; /* in/out */
700 __u64 flags; /* in/out */
703 __u64 values[BTRFS_DEV_STAT_VALUES_MAX];
706 * This pads the struct to 1032 bytes. It was originally meant to pad to
707 * 1024 bytes, but when adding the flags field, the padding calculation
710 __u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX];
713 #define BTRFS_QUOTA_CTL_ENABLE 1
714 #define BTRFS_QUOTA_CTL_DISABLE 2
715 #define BTRFS_QUOTA_CTL_RESCAN__NOTUSED 3
716 struct btrfs_ioctl_quota_ctl_args {
721 struct btrfs_ioctl_quota_rescan_args {
727 struct btrfs_ioctl_qgroup_assign_args {
733 struct btrfs_ioctl_qgroup_create_args {
737 struct btrfs_ioctl_timespec {
742 struct btrfs_ioctl_received_subvol_args {
743 char uuid[BTRFS_UUID_SIZE]; /* in */
744 __u64 stransid; /* in */
745 __u64 rtransid; /* out */
746 struct btrfs_ioctl_timespec stime; /* in */
747 struct btrfs_ioctl_timespec rtime; /* out */
748 __u64 flags; /* in */
749 __u64 reserved[16]; /* in */
753 * Caller doesn't want file data in the send stream, even if the
754 * search of clone sources doesn't find an extent. UPDATE_EXTENT
755 * commands will be sent instead of WRITE commands.
757 #define BTRFS_SEND_FLAG_NO_FILE_DATA 0x1
760 * Do not add the leading stream header. Used when multiple snapshots
761 * are sent back to back.
763 #define BTRFS_SEND_FLAG_OMIT_STREAM_HEADER 0x2
766 * Omit the command at the end of the stream that indicated the end
767 * of the stream. This option is used when multiple snapshots are
770 #define BTRFS_SEND_FLAG_OMIT_END_CMD 0x4
772 #define BTRFS_SEND_FLAG_MASK \
773 (BTRFS_SEND_FLAG_NO_FILE_DATA | \
774 BTRFS_SEND_FLAG_OMIT_STREAM_HEADER | \
775 BTRFS_SEND_FLAG_OMIT_END_CMD)
777 struct btrfs_ioctl_send_args {
778 __s64 send_fd; /* in */
779 __u64 clone_sources_count; /* in */
780 __u64 __user *clone_sources; /* in */
781 __u64 parent_root; /* in */
782 __u64 flags; /* in */
783 __u64 reserved[4]; /* in */
787 * Information about a fs tree root.
789 * All items are filled by the ioctl
791 struct btrfs_ioctl_get_subvol_info_args {
792 /* Id of this subvolume */
795 /* Name of this subvolume, used to get the real name at mount point */
796 char name[BTRFS_VOL_NAME_MAX + 1];
799 * Id of the subvolume which contains this subvolume.
800 * Zero for top-level subvolume or a deleted subvolume.
805 * Inode number of the directory which contains this subvolume.
806 * Zero for top-level subvolume or a deleted subvolume
810 /* Latest transaction id of this subvolume */
813 /* Flags of this subvolume */
816 /* UUID of this subvolume */
817 __u8 uuid[BTRFS_UUID_SIZE];
820 * UUID of the subvolume of which this subvolume is a snapshot.
821 * All zero for a non-snapshot subvolume.
823 __u8 parent_uuid[BTRFS_UUID_SIZE];
826 * UUID of the subvolume from which this subvolume was received.
827 * All zero for non-received subvolume.
829 __u8 received_uuid[BTRFS_UUID_SIZE];
831 /* Transaction id indicating when change/create/send/receive happened */
836 /* Time corresponding to c/o/s/rtransid */
837 struct btrfs_ioctl_timespec ctime;
838 struct btrfs_ioctl_timespec otime;
839 struct btrfs_ioctl_timespec stime;
840 struct btrfs_ioctl_timespec rtime;
846 #define BTRFS_MAX_ROOTREF_BUFFER_NUM 255
847 struct btrfs_ioctl_get_subvol_rootref_args {
848 /* in/out, minimum id of rootref's treeid to be searched */
855 } rootref[BTRFS_MAX_ROOTREF_BUFFER_NUM];
857 /* out, number of found items */
862 /* Error codes as returned by the kernel */
863 enum btrfs_err_code {
864 BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET = 1,
865 BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET,
866 BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET,
867 BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET,
868 BTRFS_ERROR_DEV_TGT_REPLACE,
869 BTRFS_ERROR_DEV_MISSING_NOT_FOUND,
870 BTRFS_ERROR_DEV_ONLY_WRITABLE,
871 BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS,
872 BTRFS_ERROR_DEV_RAID1C3_MIN_NOT_MET,
873 BTRFS_ERROR_DEV_RAID1C4_MIN_NOT_MET,
876 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
877 struct btrfs_ioctl_vol_args)
878 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
879 struct btrfs_ioctl_vol_args)
880 #define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
881 struct btrfs_ioctl_vol_args)
882 #define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
883 struct btrfs_ioctl_vol_args)
884 #define BTRFS_IOC_FORGET_DEV _IOW(BTRFS_IOCTL_MAGIC, 5, \
885 struct btrfs_ioctl_vol_args)
886 /* trans start and trans end are dangerous, and only for
887 * use by applications that know how to avoid the
888 * resulting deadlocks
890 #define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6)
891 #define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7)
892 #define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8)
894 #define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
895 #define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
896 struct btrfs_ioctl_vol_args)
897 #define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
898 struct btrfs_ioctl_vol_args)
899 #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
900 struct btrfs_ioctl_vol_args)
902 #define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
903 struct btrfs_ioctl_clone_range_args)
905 #define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
906 struct btrfs_ioctl_vol_args)
907 #define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
908 struct btrfs_ioctl_vol_args)
909 #define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
910 struct btrfs_ioctl_defrag_range_args)
911 #define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
912 struct btrfs_ioctl_search_args)
913 #define BTRFS_IOC_TREE_SEARCH_V2 _IOWR(BTRFS_IOCTL_MAGIC, 17, \
914 struct btrfs_ioctl_search_args_v2)
915 #define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
916 struct btrfs_ioctl_ino_lookup_args)
917 #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, __u64)
918 #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
919 struct btrfs_ioctl_space_args)
920 #define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
921 #define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
922 #define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
923 struct btrfs_ioctl_vol_args_v2)
924 #define BTRFS_IOC_SUBVOL_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 24, \
925 struct btrfs_ioctl_vol_args_v2)
926 #define BTRFS_IOC_SUBVOL_GETFLAGS _IOR(BTRFS_IOCTL_MAGIC, 25, __u64)
927 #define BTRFS_IOC_SUBVOL_SETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 26, __u64)
928 #define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \
929 struct btrfs_ioctl_scrub_args)
930 #define BTRFS_IOC_SCRUB_CANCEL _IO(BTRFS_IOCTL_MAGIC, 28)
931 #define BTRFS_IOC_SCRUB_PROGRESS _IOWR(BTRFS_IOCTL_MAGIC, 29, \
932 struct btrfs_ioctl_scrub_args)
933 #define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \
934 struct btrfs_ioctl_dev_info_args)
935 #define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \
936 struct btrfs_ioctl_fs_info_args)
937 #define BTRFS_IOC_BALANCE_V2 _IOWR(BTRFS_IOCTL_MAGIC, 32, \
938 struct btrfs_ioctl_balance_args)
939 #define BTRFS_IOC_BALANCE_CTL _IOW(BTRFS_IOCTL_MAGIC, 33, int)
940 #define BTRFS_IOC_BALANCE_PROGRESS _IOR(BTRFS_IOCTL_MAGIC, 34, \
941 struct btrfs_ioctl_balance_args)
942 #define BTRFS_IOC_INO_PATHS _IOWR(BTRFS_IOCTL_MAGIC, 35, \
943 struct btrfs_ioctl_ino_path_args)
944 #define BTRFS_IOC_LOGICAL_INO _IOWR(BTRFS_IOCTL_MAGIC, 36, \
945 struct btrfs_ioctl_logical_ino_args)
946 #define BTRFS_IOC_SET_RECEIVED_SUBVOL _IOWR(BTRFS_IOCTL_MAGIC, 37, \
947 struct btrfs_ioctl_received_subvol_args)
948 #define BTRFS_IOC_SEND _IOW(BTRFS_IOCTL_MAGIC, 38, struct btrfs_ioctl_send_args)
949 #define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \
950 struct btrfs_ioctl_vol_args)
951 #define BTRFS_IOC_QUOTA_CTL _IOWR(BTRFS_IOCTL_MAGIC, 40, \
952 struct btrfs_ioctl_quota_ctl_args)
953 #define BTRFS_IOC_QGROUP_ASSIGN _IOW(BTRFS_IOCTL_MAGIC, 41, \
954 struct btrfs_ioctl_qgroup_assign_args)
955 #define BTRFS_IOC_QGROUP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 42, \
956 struct btrfs_ioctl_qgroup_create_args)
957 #define BTRFS_IOC_QGROUP_LIMIT _IOR(BTRFS_IOCTL_MAGIC, 43, \
958 struct btrfs_ioctl_qgroup_limit_args)
959 #define BTRFS_IOC_QUOTA_RESCAN _IOW(BTRFS_IOCTL_MAGIC, 44, \
960 struct btrfs_ioctl_quota_rescan_args)
961 #define BTRFS_IOC_QUOTA_RESCAN_STATUS _IOR(BTRFS_IOCTL_MAGIC, 45, \
962 struct btrfs_ioctl_quota_rescan_args)
963 #define BTRFS_IOC_QUOTA_RESCAN_WAIT _IO(BTRFS_IOCTL_MAGIC, 46)
964 #define BTRFS_IOC_GET_FSLABEL FS_IOC_GETFSLABEL
965 #define BTRFS_IOC_SET_FSLABEL FS_IOC_SETFSLABEL
966 #define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \
967 struct btrfs_ioctl_get_dev_stats)
968 #define BTRFS_IOC_DEV_REPLACE _IOWR(BTRFS_IOCTL_MAGIC, 53, \
969 struct btrfs_ioctl_dev_replace_args)
970 #define BTRFS_IOC_FILE_EXTENT_SAME _IOWR(BTRFS_IOCTL_MAGIC, 54, \
971 struct btrfs_ioctl_same_args)
972 #define BTRFS_IOC_GET_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
973 struct btrfs_ioctl_feature_flags)
974 #define BTRFS_IOC_SET_FEATURES _IOW(BTRFS_IOCTL_MAGIC, 57, \
975 struct btrfs_ioctl_feature_flags[2])
976 #define BTRFS_IOC_GET_SUPPORTED_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
977 struct btrfs_ioctl_feature_flags[3])
978 #define BTRFS_IOC_RM_DEV_V2 _IOW(BTRFS_IOCTL_MAGIC, 58, \
979 struct btrfs_ioctl_vol_args_v2)
980 #define BTRFS_IOC_LOGICAL_INO_V2 _IOWR(BTRFS_IOCTL_MAGIC, 59, \
981 struct btrfs_ioctl_logical_ino_args)
982 #define BTRFS_IOC_GET_SUBVOL_INFO _IOR(BTRFS_IOCTL_MAGIC, 60, \
983 struct btrfs_ioctl_get_subvol_info_args)
984 #define BTRFS_IOC_GET_SUBVOL_ROOTREF _IOWR(BTRFS_IOCTL_MAGIC, 61, \
985 struct btrfs_ioctl_get_subvol_rootref_args)
986 #define BTRFS_IOC_INO_LOOKUP_USER _IOWR(BTRFS_IOCTL_MAGIC, 62, \
987 struct btrfs_ioctl_ino_lookup_user_args)
988 #define BTRFS_IOC_SNAP_DESTROY_V2 _IOW(BTRFS_IOCTL_MAGIC, 63, \
989 struct btrfs_ioctl_vol_args_v2)
991 #endif /* _UAPI_LINUX_BTRFS_H */