2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_IOCTL_H__
20 #define __BTRFS_IOCTL_H__
22 #include <asm/types.h>
23 #include <linux/ioctl.h>
30 #define BTRFS_IOCTL_MAGIC 0x94
31 #define BTRFS_VOL_NAME_MAX 255
33 /* this should be 4k */
34 #define BTRFS_PATH_NAME_MAX 4087
35 struct btrfs_ioctl_vol_args {
37 char name[BTRFS_PATH_NAME_MAX + 1];
40 #define BTRFS_DEVICE_PATH_NAME_MAX 1024
42 #define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)
43 #define BTRFS_SUBVOL_RDONLY (1ULL << 1)
44 #define BTRFS_SUBVOL_QGROUP_INHERIT (1ULL << 2)
45 #define BTRFS_FSID_SIZE 16
46 #define BTRFS_UUID_SIZE 16
48 #define BTRFS_QGROUP_INHERIT_SET_LIMITS (1ULL << 0)
50 struct btrfs_qgroup_limit {
58 struct btrfs_qgroup_inherit {
62 __u64 num_excl_copies;
63 struct btrfs_qgroup_limit lim;
67 struct btrfs_ioctl_qgroup_limit_args {
69 struct btrfs_qgroup_limit lim;
72 #define BTRFS_SUBVOL_NAME_MAX 4039
73 struct btrfs_ioctl_vol_args_v2 {
80 struct btrfs_qgroup_inherit *qgroup_inherit;
84 char name[BTRFS_SUBVOL_NAME_MAX + 1];
88 * structure to report errors and progress to userspace, either as a
89 * result of a finished scrub, a canceled scrub or a progress inquiry
91 struct btrfs_scrub_progress {
92 __u64 data_extents_scrubbed; /* # of data extents scrubbed */
93 __u64 tree_extents_scrubbed; /* # of tree extents scrubbed */
94 __u64 data_bytes_scrubbed; /* # of data bytes scrubbed */
95 __u64 tree_bytes_scrubbed; /* # of tree bytes scrubbed */
96 __u64 read_errors; /* # of read errors encountered (EIO) */
97 __u64 csum_errors; /* # of failed csum checks */
98 __u64 verify_errors; /* # of occurences, where the metadata
99 * of a tree block did not match the
100 * expected values, like generation or
102 __u64 no_csum; /* # of 4k data block for which no csum
103 * is present, probably the result of
104 * data written with nodatasum */
105 __u64 csum_discards; /* # of csum for which no data was found
106 * in the extent tree. */
107 __u64 super_errors; /* # of bad super blocks encountered */
108 __u64 malloc_errors; /* # of internal kmalloc errors. These
109 * will likely cause an incomplete
111 __u64 uncorrectable_errors; /* # of errors where either no intact
112 * copy was found or the writeback
114 __u64 corrected_errors; /* # of errors corrected */
115 __u64 last_physical; /* last physical address scrubbed. In
116 * case a scrub was aborted, this can
117 * be used to restart the scrub */
118 __u64 unverified_errors; /* # of occurences where a read for a
119 * full (64k) bio failed, but the re-
120 * check succeeded for each 4k piece.
121 * Intermittent error. */
124 #define BTRFS_SCRUB_READONLY 1
125 struct btrfs_ioctl_scrub_args {
126 __u64 devid; /* in */
127 __u64 start; /* in */
129 __u64 flags; /* in */
130 struct btrfs_scrub_progress progress; /* out */
132 __u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8];
135 #define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
136 #define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
137 struct btrfs_ioctl_dev_replace_start_params {
138 __u64 srcdevid; /* in, if 0, use srcdev_name instead */
139 __u64 cont_reading_from_srcdev_mode; /* in, see #define
141 __u8 srcdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */
142 __u8 tgtdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */
145 #define BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED 0
146 #define BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED 1
147 #define BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED 2
148 #define BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED 3
149 #define BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED 4
150 struct btrfs_ioctl_dev_replace_status_params {
151 __u64 replace_state; /* out, see #define above */
152 __u64 progress_1000; /* out, 0 <= x <= 1000 */
153 __u64 time_started; /* out, seconds since 1-Jan-1970 */
154 __u64 time_stopped; /* out, seconds since 1-Jan-1970 */
155 __u64 num_write_errors; /* out */
156 __u64 num_uncorrectable_read_errors; /* out */
159 #define BTRFS_IOCTL_DEV_REPLACE_CMD_START 0
160 #define BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS 1
161 #define BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL 2
162 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_RESULT -1
163 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR 0
164 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED 1
165 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_ALREADY_STARTED 2
166 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_SCRUB_INPROGRESS 3
167 struct btrfs_ioctl_dev_replace_args {
169 __u64 result; /* out */
172 struct btrfs_ioctl_dev_replace_start_params start;
173 struct btrfs_ioctl_dev_replace_status_params status;
179 struct btrfs_ioctl_dev_info_args {
180 __u64 devid; /* in/out */
181 __u8 uuid[BTRFS_UUID_SIZE]; /* in/out */
182 __u64 bytes_used; /* out */
183 __u64 total_bytes; /* out */
184 __u64 unused[379]; /* pad to 4k */
185 __u8 path[BTRFS_DEVICE_PATH_NAME_MAX]; /* out */
188 struct btrfs_ioctl_fs_info_args {
189 __u64 max_id; /* out */
190 __u64 num_devices; /* out */
191 __u8 fsid[BTRFS_FSID_SIZE]; /* out */
192 __u64 reserved[124]; /* pad to 1k */
195 /* balance control ioctl modes */
196 #define BTRFS_BALANCE_CTL_PAUSE 1
197 #define BTRFS_BALANCE_CTL_CANCEL 2
198 #define BTRFS_BALANCE_CTL_RESUME 3
201 * this is packed, because it should be exactly the same as its disk
202 * byte order counterpart (struct btrfs_disk_balance_args)
204 struct btrfs_balance_args {
220 } __attribute__ ((__packed__));
222 struct btrfs_balance_progress {
228 #define BTRFS_BALANCE_STATE_RUNNING (1ULL << 0)
229 #define BTRFS_BALANCE_STATE_PAUSE_REQ (1ULL << 1)
230 #define BTRFS_BALANCE_STATE_CANCEL_REQ (1ULL << 2)
232 struct btrfs_ioctl_balance_args {
233 __u64 flags; /* in/out */
234 __u64 state; /* out */
236 struct btrfs_balance_args data; /* in/out */
237 struct btrfs_balance_args meta; /* in/out */
238 struct btrfs_balance_args sys; /* in/out */
240 struct btrfs_balance_progress stat; /* out */
242 __u64 unused[72]; /* pad to 1k */
245 #define BTRFS_INO_LOOKUP_PATH_MAX 4080
246 struct btrfs_ioctl_ino_lookup_args {
249 char name[BTRFS_INO_LOOKUP_PATH_MAX];
252 struct btrfs_ioctl_search_key {
253 /* which root are we searching. 0 is the tree of tree roots */
256 /* keys returned will be >= min and <= max */
260 /* keys returned will be >= min and <= max */
264 /* max and min transids to search for */
268 /* keys returned will be >= min and <= max */
273 * how many items did userland ask for, and how many are we
278 /* align to 64 bits */
281 /* some extra for later */
288 struct btrfs_ioctl_search_header {
294 } __attribute__((may_alias));
296 #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
298 * the buf is an array of search headers where
299 * each header is followed by the actual item
300 * the type field is expanded to 32 bits for alignment
302 struct btrfs_ioctl_search_args {
303 struct btrfs_ioctl_search_key key;
304 char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
308 * Extended version of TREE_SEARCH ioctl that can return more than 4k of bytes.
309 * The allocated size of the buffer is set in buf_size.
311 struct btrfs_ioctl_search_args_v2 {
312 struct btrfs_ioctl_search_key key; /* in/out - search parameters */
313 __u64 buf_size; /* in - size of buffer
314 * out - on EOVERFLOW: needed size
316 __u64 buf[0]; /* out - found items */
319 /* With a @src_length of zero, the range from @src_offset->EOF is cloned! */
320 struct btrfs_ioctl_clone_range_args {
322 __u64 src_offset, src_length;
326 /* flags for the defrag range ioctl */
327 #define BTRFS_DEFRAG_RANGE_COMPRESS 1
328 #define BTRFS_DEFRAG_RANGE_START_IO 2
330 struct btrfs_ioctl_defrag_range_args {
331 /* start of the defrag operation */
334 /* number of bytes to defrag, use (u64)-1 to say all */
338 * flags for the operation, which can include turning
339 * on compression for this one defrag
344 * any extent bigger than this will be considered
345 * already defragged. Use 0 to take the kernel default
346 * Use 1 to say every single extent must be rewritten
351 * which compression method to use if turning on compression
352 * for this defrag operation. If unspecified, zlib will
357 /* spare for later */
361 struct btrfs_ioctl_space_info {
367 struct btrfs_ioctl_space_args {
370 struct btrfs_ioctl_space_info spaces[0];
373 struct btrfs_data_container {
374 __u32 bytes_left; /* out -- bytes not needed to deliver output */
375 __u32 bytes_missing; /* out -- additional bytes needed for result */
376 __u32 elem_cnt; /* out */
377 __u32 elem_missed; /* out */
378 __u64 val[0]; /* out */
381 struct btrfs_ioctl_ino_path_args {
385 /* struct btrfs_data_container *fspath; out */
386 __u64 fspath; /* out */
389 struct btrfs_ioctl_logical_ino_args {
390 __u64 logical; /* in */
393 /* struct btrfs_data_container *inodes; out */
397 enum btrfs_dev_stat_values {
398 /* disk I/O failure stats */
399 BTRFS_DEV_STAT_WRITE_ERRS, /* EIO or EREMOTEIO from lower layers */
400 BTRFS_DEV_STAT_READ_ERRS, /* EIO or EREMOTEIO from lower layers */
401 BTRFS_DEV_STAT_FLUSH_ERRS, /* EIO or EREMOTEIO from lower layers */
403 /* stats for indirect indications for I/O failures */
404 BTRFS_DEV_STAT_CORRUPTION_ERRS, /* checksum error, bytenr error or
405 * contents is illegal: this is an
406 * indication that the block was damaged
407 * during read or write, or written to
408 * wrong location or read from wrong
410 BTRFS_DEV_STAT_GENERATION_ERRS, /* an indication that blocks have not
413 BTRFS_DEV_STAT_VALUES_MAX
416 /* Reset statistics after reading; needs SYS_ADMIN capability */
417 #define BTRFS_DEV_STATS_RESET (1ULL << 0)
419 struct btrfs_ioctl_get_dev_stats {
420 __u64 devid; /* in */
421 __u64 nr_items; /* in/out */
422 __u64 flags; /* in/out */
425 __u64 values[BTRFS_DEV_STAT_VALUES_MAX];
427 __u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX]; /* pad to 1k */
430 /* BTRFS_IOC_SNAP_CREATE is no longer used by the btrfs command */
431 #define BTRFS_QUOTA_CTL_ENABLE 1
432 #define BTRFS_QUOTA_CTL_DISABLE 2
433 /* 3 has formerly been reserved for BTRFS_QUOTA_CTL_RESCAN */
434 struct btrfs_ioctl_quota_ctl_args {
439 struct btrfs_ioctl_quota_rescan_args {
445 struct btrfs_ioctl_qgroup_assign_args {
451 struct btrfs_ioctl_qgroup_create_args {
455 struct btrfs_ioctl_timespec {
460 struct btrfs_ioctl_received_subvol_args {
461 char uuid[BTRFS_UUID_SIZE]; /* in */
462 __u64 stransid; /* in */
463 __u64 rtransid; /* out */
464 struct btrfs_ioctl_timespec stime; /* in */
465 struct btrfs_ioctl_timespec rtime; /* out */
466 __u64 flags; /* in */
467 __u64 reserved[16]; /* in */
471 * Caller doesn't want file data in the send stream, even if the
472 * search of clone sources doesn't find an extent. UPDATE_EXTENT
473 * commands will be sent instead of WRITE commands.
475 #define BTRFS_SEND_FLAG_NO_FILE_DATA 0x1
478 * Do not add the leading stream header. Used when multiple snapshots
479 * are sent back to back.
481 #define BTRFS_SEND_FLAG_OMIT_STREAM_HEADER 0x2
484 * Omit the command at the end of the stream that indicated the end
485 * of the stream. This option is used when multiple snapshots are
488 #define BTRFS_SEND_FLAG_OMIT_END_CMD 0x4
490 struct btrfs_ioctl_send_args {
491 __s64 send_fd; /* in */
492 __u64 clone_sources_count; /* in */
493 __u64 *clone_sources; /* in */
494 __u64 parent_root; /* in */
495 __u64 flags; /* in */
496 __u64 reserved[4]; /* in */
500 /* Error codes as returned by the kernel */
501 enum btrfs_err_code {
503 BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET,
504 BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET,
505 BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET,
506 BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET,
507 BTRFS_ERROR_DEV_TGT_REPLACE,
508 BTRFS_ERROR_DEV_MISSING_NOT_FOUND,
509 BTRFS_ERROR_DEV_ONLY_WRITABLE,
510 BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS
513 /* An error code to error string mapping for the kernel
516 static inline char *btrfs_err_str(enum btrfs_err_code err_code)
519 case BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET:
520 return "unable to go below two devices on raid1";
521 case BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET:
522 return "unable to go below four devices on raid10";
523 case BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET:
524 return "unable to go below two devices on raid5";
525 case BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET:
526 return "unable to go below three devices on raid6";
527 case BTRFS_ERROR_DEV_TGT_REPLACE:
528 return "unable to remove the dev_replace target dev";
529 case BTRFS_ERROR_DEV_MISSING_NOT_FOUND:
530 return "no missing devices found to remove";
531 case BTRFS_ERROR_DEV_ONLY_WRITABLE:
532 return "unable to remove the only writeable device";
533 case BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS:
534 return "add/delete/balance/replace/resize operation "
541 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
542 struct btrfs_ioctl_vol_args)
543 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
544 struct btrfs_ioctl_vol_args)
545 #define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
546 struct btrfs_ioctl_vol_args)
547 #define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
548 struct btrfs_ioctl_vol_args)
549 /* trans start and trans end are dangerous, and only for
550 * use by applications that know how to avoid the
551 * resulting deadlocks
553 #define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6)
554 #define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7)
555 #define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8)
557 #define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
558 #define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
559 struct btrfs_ioctl_vol_args)
560 #define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
561 struct btrfs_ioctl_vol_args)
562 #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
563 struct btrfs_ioctl_vol_args)
565 #define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
566 struct btrfs_ioctl_clone_range_args)
568 #define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
569 struct btrfs_ioctl_vol_args)
570 #define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
571 struct btrfs_ioctl_vol_args)
572 #define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
573 struct btrfs_ioctl_defrag_range_args)
574 #define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
575 struct btrfs_ioctl_search_args)
576 #define BTRFS_IOC_TREE_SEARCH_V2 _IOWR(BTRFS_IOCTL_MAGIC, 17, \
577 struct btrfs_ioctl_search_args_v2)
578 #define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
579 struct btrfs_ioctl_ino_lookup_args)
580 #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, __u64)
581 #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
582 struct btrfs_ioctl_space_args)
583 #define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
584 #define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
585 #define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
586 struct btrfs_ioctl_vol_args_v2)
587 #define BTRFS_IOC_SUBVOL_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 24, \
588 struct btrfs_ioctl_vol_args_v2)
589 #define BTRFS_IOC_SUBVOL_GETFLAGS _IOR(BTRFS_IOCTL_MAGIC, 25, __u64)
590 #define BTRFS_IOC_SUBVOL_SETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 26, __u64)
591 #define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \
592 struct btrfs_ioctl_scrub_args)
593 #define BTRFS_IOC_SCRUB_CANCEL _IO(BTRFS_IOCTL_MAGIC, 28)
594 #define BTRFS_IOC_SCRUB_PROGRESS _IOWR(BTRFS_IOCTL_MAGIC, 29, \
595 struct btrfs_ioctl_scrub_args)
596 #define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \
597 struct btrfs_ioctl_dev_info_args)
598 #define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \
599 struct btrfs_ioctl_fs_info_args)
600 #define BTRFS_IOC_BALANCE_V2 _IOWR(BTRFS_IOCTL_MAGIC, 32, \
601 struct btrfs_ioctl_balance_args)
602 #define BTRFS_IOC_BALANCE_CTL _IOW(BTRFS_IOCTL_MAGIC, 33, int)
603 #define BTRFS_IOC_BALANCE_PROGRESS _IOR(BTRFS_IOCTL_MAGIC, 34, \
604 struct btrfs_ioctl_balance_args)
605 #define BTRFS_IOC_INO_PATHS _IOWR(BTRFS_IOCTL_MAGIC, 35, \
606 struct btrfs_ioctl_ino_path_args)
607 #define BTRFS_IOC_LOGICAL_INO _IOWR(BTRFS_IOCTL_MAGIC, 36, \
608 struct btrfs_ioctl_ino_path_args)
609 #define BTRFS_IOC_SET_RECEIVED_SUBVOL _IOWR(BTRFS_IOCTL_MAGIC, 37, \
610 struct btrfs_ioctl_received_subvol_args)
611 #define BTRFS_IOC_SEND _IOW(BTRFS_IOCTL_MAGIC, 38, struct btrfs_ioctl_send_args)
612 #define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \
613 struct btrfs_ioctl_vol_args)
614 #define BTRFS_IOC_QUOTA_CTL _IOWR(BTRFS_IOCTL_MAGIC, 40, \
615 struct btrfs_ioctl_quota_ctl_args)
616 #define BTRFS_IOC_QGROUP_ASSIGN _IOW(BTRFS_IOCTL_MAGIC, 41, \
617 struct btrfs_ioctl_qgroup_assign_args)
618 #define BTRFS_IOC_QGROUP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 42, \
619 struct btrfs_ioctl_qgroup_create_args)
620 #define BTRFS_IOC_QGROUP_LIMIT _IOR(BTRFS_IOCTL_MAGIC, 43, \
621 struct btrfs_ioctl_qgroup_limit_args)
622 #define BTRFS_IOC_QUOTA_RESCAN _IOW(BTRFS_IOCTL_MAGIC, 44, \
623 struct btrfs_ioctl_quota_rescan_args)
624 #define BTRFS_IOC_QUOTA_RESCAN_STATUS _IOR(BTRFS_IOCTL_MAGIC, 45, \
625 struct btrfs_ioctl_quota_rescan_args)
626 #define BTRFS_IOC_QUOTA_RESCAN_WAIT _IO(BTRFS_IOCTL_MAGIC, 46)
627 #define BTRFS_IOC_GET_FSLABEL _IOR(BTRFS_IOCTL_MAGIC, 49, \
628 char[BTRFS_LABEL_SIZE])
629 #define BTRFS_IOC_SET_FSLABEL _IOW(BTRFS_IOCTL_MAGIC, 50, \
630 char[BTRFS_LABEL_SIZE])
631 #define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \
632 struct btrfs_ioctl_get_dev_stats)
633 #define BTRFS_IOC_DEV_REPLACE _IOWR(BTRFS_IOCTL_MAGIC, 53, \
634 struct btrfs_ioctl_dev_replace_args)
635 #define BTRFS_IOC_GET_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
636 struct btrfs_ioctl_feature_flags)
637 #define BTRFS_IOC_SET_FEATURES _IOW(BTRFS_IOCTL_MAGIC, 57, \
638 struct btrfs_ioctl_feature_flags[2])
639 #define BTRFS_IOC_GET_SUPPORTED_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
640 struct btrfs_ioctl_feature_flags[3])