xref: /linux/include/uapi/linux/btrfs.h (revision 79790b6818e96c58fe2bffee1b418c16e64e7b80)
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
24 extern "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
37 struct 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 
80 struct 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 #define BTRFS_QGROUP_INHERIT_FLAGS_SUPP (BTRFS_QGROUP_INHERIT_SET_LIMITS)
96 
97 struct btrfs_qgroup_inherit {
98 	__u64	flags;
99 	__u64	num_qgroups;
100 	__u64	num_ref_copies;
101 	__u64	num_excl_copies;
102 	struct btrfs_qgroup_limit lim;
103 	__u64	qgroups[];
104 };
105 
106 struct btrfs_ioctl_qgroup_limit_args {
107 	__u64	qgroupid;
108 	struct btrfs_qgroup_limit lim;
109 };
110 
111 /*
112  * Arguments for specification of subvolumes or devices, supporting by-name or
113  * by-id and flags
114  *
115  * The set of supported flags depends on the ioctl
116  *
117  * BTRFS_SUBVOL_RDONLY is also provided/consumed by the following ioctls:
118  * - BTRFS_IOC_SUBVOL_GETFLAGS
119  * - BTRFS_IOC_SUBVOL_SETFLAGS
120  */
121 
122 /* Supported flags for BTRFS_IOC_RM_DEV_V2 */
123 #define BTRFS_DEVICE_REMOVE_ARGS_MASK					\
124 	(BTRFS_DEVICE_SPEC_BY_ID)
125 
126 /* Supported flags for BTRFS_IOC_SNAP_CREATE_V2 and BTRFS_IOC_SUBVOL_CREATE_V2 */
127 #define BTRFS_SUBVOL_CREATE_ARGS_MASK					\
128 	 (BTRFS_SUBVOL_RDONLY |						\
129 	 BTRFS_SUBVOL_QGROUP_INHERIT)
130 
131 /* Supported flags for BTRFS_IOC_SNAP_DESTROY_V2 */
132 #define BTRFS_SUBVOL_DELETE_ARGS_MASK					\
133 	(BTRFS_SUBVOL_SPEC_BY_ID)
134 
135 struct btrfs_ioctl_vol_args_v2 {
136 	__s64 fd;
137 	__u64 transid;
138 	__u64 flags;
139 	union {
140 		struct {
141 			__u64 size;
142 			struct btrfs_qgroup_inherit __user *qgroup_inherit;
143 		};
144 		__u64 unused[4];
145 	};
146 	union {
147 		char name[BTRFS_SUBVOL_NAME_MAX + 1];
148 		__u64 devid;
149 		__u64 subvolid;
150 	};
151 };
152 
153 /*
154  * structure to report errors and progress to userspace, either as a
155  * result of a finished scrub, a canceled scrub or a progress inquiry
156  */
157 struct btrfs_scrub_progress {
158 	__u64 data_extents_scrubbed;	/* # of data extents scrubbed */
159 	__u64 tree_extents_scrubbed;	/* # of tree extents scrubbed */
160 	__u64 data_bytes_scrubbed;	/* # of data bytes scrubbed */
161 	__u64 tree_bytes_scrubbed;	/* # of tree bytes scrubbed */
162 	__u64 read_errors;		/* # of read errors encountered (EIO) */
163 	__u64 csum_errors;		/* # of failed csum checks */
164 	__u64 verify_errors;		/* # of occurrences, where the metadata
165 					 * of a tree block did not match the
166 					 * expected values, like generation or
167 					 * logical */
168 	__u64 no_csum;			/* # of 4k data block for which no csum
169 					 * is present, probably the result of
170 					 * data written with nodatasum */
171 	__u64 csum_discards;		/* # of csum for which no data was found
172 					 * in the extent tree. */
173 	__u64 super_errors;		/* # of bad super blocks encountered */
174 	__u64 malloc_errors;		/* # of internal kmalloc errors. These
175 					 * will likely cause an incomplete
176 					 * scrub */
177 	__u64 uncorrectable_errors;	/* # of errors where either no intact
178 					 * copy was found or the writeback
179 					 * failed */
180 	__u64 corrected_errors;		/* # of errors corrected */
181 	__u64 last_physical;		/* last physical address scrubbed. In
182 					 * case a scrub was aborted, this can
183 					 * be used to restart the scrub */
184 	__u64 unverified_errors;	/* # of occurrences where a read for a
185 					 * full (64k) bio failed, but the re-
186 					 * check succeeded for each 4k piece.
187 					 * Intermittent error. */
188 };
189 
190 #define BTRFS_SCRUB_READONLY	1
191 #define BTRFS_SCRUB_SUPPORTED_FLAGS	(BTRFS_SCRUB_READONLY)
192 struct btrfs_ioctl_scrub_args {
193 	__u64 devid;				/* in */
194 	__u64 start;				/* in */
195 	__u64 end;				/* in */
196 	__u64 flags;				/* in */
197 	struct btrfs_scrub_progress progress;	/* out */
198 	/* pad to 1k */
199 	__u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8];
200 };
201 
202 #define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS	0
203 #define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID	1
204 struct btrfs_ioctl_dev_replace_start_params {
205 	__u64 srcdevid;	/* in, if 0, use srcdev_name instead */
206 	__u64 cont_reading_from_srcdev_mode;	/* in, see #define
207 						 * above */
208 	__u8 srcdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1];	/* in */
209 	__u8 tgtdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1];	/* in */
210 };
211 
212 #define BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED	0
213 #define BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED		1
214 #define BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED		2
215 #define BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED		3
216 #define BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED		4
217 struct btrfs_ioctl_dev_replace_status_params {
218 	__u64 replace_state;	/* out, see #define above */
219 	__u64 progress_1000;	/* out, 0 <= x <= 1000 */
220 	__u64 time_started;	/* out, seconds since 1-Jan-1970 */
221 	__u64 time_stopped;	/* out, seconds since 1-Jan-1970 */
222 	__u64 num_write_errors;	/* out */
223 	__u64 num_uncorrectable_read_errors;	/* out */
224 };
225 
226 #define BTRFS_IOCTL_DEV_REPLACE_CMD_START			0
227 #define BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS			1
228 #define BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL			2
229 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR			0
230 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED		1
231 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_ALREADY_STARTED		2
232 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_SCRUB_INPROGRESS		3
233 struct btrfs_ioctl_dev_replace_args {
234 	__u64 cmd;	/* in */
235 	__u64 result;	/* out */
236 
237 	union {
238 		struct btrfs_ioctl_dev_replace_start_params start;
239 		struct btrfs_ioctl_dev_replace_status_params status;
240 	};	/* in/out */
241 
242 	__u64 spare[64];
243 };
244 
245 struct btrfs_ioctl_dev_info_args {
246 	__u64 devid;				/* in/out */
247 	__u8 uuid[BTRFS_UUID_SIZE];		/* in/out */
248 	__u64 bytes_used;			/* out */
249 	__u64 total_bytes;			/* out */
250 	/*
251 	 * Optional, out.
252 	 *
253 	 * Showing the fsid of the device, allowing user space to check if this
254 	 * device is a seeding one.
255 	 *
256 	 * Introduced in v6.3, thus user space still needs to check if kernel
257 	 * changed this value.  Older kernel will not touch the values here.
258 	 */
259 	__u8 fsid[BTRFS_UUID_SIZE];
260 	__u64 unused[377];			/* pad to 4k */
261 	__u8 path[BTRFS_DEVICE_PATH_NAME_MAX];	/* out */
262 };
263 
264 /*
265  * Retrieve information about the filesystem
266  */
267 
268 /* Request information about checksum type and size */
269 #define BTRFS_FS_INFO_FLAG_CSUM_INFO			(1 << 0)
270 
271 /* Request information about filesystem generation */
272 #define BTRFS_FS_INFO_FLAG_GENERATION			(1 << 1)
273 /* Request information about filesystem metadata UUID */
274 #define BTRFS_FS_INFO_FLAG_METADATA_UUID		(1 << 2)
275 
276 struct btrfs_ioctl_fs_info_args {
277 	__u64 max_id;				/* out */
278 	__u64 num_devices;			/* out */
279 	__u8 fsid[BTRFS_FSID_SIZE];		/* out */
280 	__u32 nodesize;				/* out */
281 	__u32 sectorsize;			/* out */
282 	__u32 clone_alignment;			/* out */
283 	/* See BTRFS_FS_INFO_FLAG_* */
284 	__u16 csum_type;			/* out */
285 	__u16 csum_size;			/* out */
286 	__u64 flags;				/* in/out */
287 	__u64 generation;			/* out */
288 	__u8 metadata_uuid[BTRFS_FSID_SIZE];	/* out */
289 	__u8 reserved[944];			/* pad to 1k */
290 };
291 
292 /*
293  * feature flags
294  *
295  * Used by:
296  * struct btrfs_ioctl_feature_flags
297  */
298 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE		(1ULL << 0)
299 /*
300  * Older kernels (< 4.9) on big-endian systems produced broken free space tree
301  * bitmaps, and btrfs-progs also used to corrupt the free space tree (versions
302  * < 4.7.3).  If this bit is clear, then the free space tree cannot be trusted.
303  * btrfs-progs can also intentionally clear this bit to ask the kernel to
304  * rebuild the free space tree, however this might not work on older kernels
305  * that do not know about this bit. If not sure, clear the cache manually on
306  * first mount when booting older kernel versions.
307  */
308 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID	(1ULL << 1)
309 #define BTRFS_FEATURE_COMPAT_RO_VERITY			(1ULL << 2)
310 
311 /*
312  * Put all block group items into a dedicated block group tree, greatly
313  * reducing mount time for large filesystem due to better locality.
314  */
315 #define BTRFS_FEATURE_COMPAT_RO_BLOCK_GROUP_TREE	(1ULL << 3)
316 
317 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF	(1ULL << 0)
318 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL	(1ULL << 1)
319 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS	(1ULL << 2)
320 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO	(1ULL << 3)
321 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD	(1ULL << 4)
322 
323 /*
324  * older kernels tried to do bigger metadata blocks, but the
325  * code was pretty buggy.  Lets not let them try anymore.
326  */
327 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA	(1ULL << 5)
328 
329 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF	(1ULL << 6)
330 #define BTRFS_FEATURE_INCOMPAT_RAID56		(1ULL << 7)
331 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA	(1ULL << 8)
332 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES		(1ULL << 9)
333 #define BTRFS_FEATURE_INCOMPAT_METADATA_UUID	(1ULL << 10)
334 #define BTRFS_FEATURE_INCOMPAT_RAID1C34		(1ULL << 11)
335 #define BTRFS_FEATURE_INCOMPAT_ZONED		(1ULL << 12)
336 #define BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2	(1ULL << 13)
337 #define BTRFS_FEATURE_INCOMPAT_RAID_STRIPE_TREE	(1ULL << 14)
338 #define BTRFS_FEATURE_INCOMPAT_SIMPLE_QUOTA	(1ULL << 16)
339 
340 struct btrfs_ioctl_feature_flags {
341 	__u64 compat_flags;
342 	__u64 compat_ro_flags;
343 	__u64 incompat_flags;
344 };
345 
346 /* balance control ioctl modes */
347 #define BTRFS_BALANCE_CTL_PAUSE		1
348 #define BTRFS_BALANCE_CTL_CANCEL	2
349 
350 /*
351  * this is packed, because it should be exactly the same as its disk
352  * byte order counterpart (struct btrfs_disk_balance_args)
353  */
354 struct btrfs_balance_args {
355 	__u64 profiles;
356 
357 	/*
358 	 * usage filter
359 	 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
360 	 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
361 	 */
362 	union {
363 		__u64 usage;
364 		struct {
365 			__u32 usage_min;
366 			__u32 usage_max;
367 		};
368 	};
369 	__u64 devid;
370 	__u64 pstart;
371 	__u64 pend;
372 	__u64 vstart;
373 	__u64 vend;
374 
375 	__u64 target;
376 
377 	__u64 flags;
378 
379 	/*
380 	 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
381 	 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
382 	 * and maximum
383 	 */
384 	union {
385 		__u64 limit;		/* limit number of processed chunks */
386 		struct {
387 			__u32 limit_min;
388 			__u32 limit_max;
389 		};
390 	};
391 
392 	/*
393 	 * Process chunks that cross stripes_min..stripes_max devices,
394 	 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
395 	 */
396 	__u32 stripes_min;
397 	__u32 stripes_max;
398 
399 	__u64 unused[6];
400 } __attribute__ ((__packed__));
401 
402 /* report balance progress to userspace */
403 struct btrfs_balance_progress {
404 	__u64 expected;		/* estimated # of chunks that will be
405 				 * relocated to fulfill the request */
406 	__u64 considered;	/* # of chunks we have considered so far */
407 	__u64 completed;	/* # of chunks relocated so far */
408 };
409 
410 /*
411  * flags definition for balance
412  *
413  * Restriper's general type filter
414  *
415  * Used by:
416  * btrfs_ioctl_balance_args.flags
417  * btrfs_balance_control.flags (internal)
418  */
419 #define BTRFS_BALANCE_DATA		(1ULL << 0)
420 #define BTRFS_BALANCE_SYSTEM		(1ULL << 1)
421 #define BTRFS_BALANCE_METADATA		(1ULL << 2)
422 
423 #define BTRFS_BALANCE_TYPE_MASK		(BTRFS_BALANCE_DATA |	    \
424 					 BTRFS_BALANCE_SYSTEM |	    \
425 					 BTRFS_BALANCE_METADATA)
426 
427 #define BTRFS_BALANCE_FORCE		(1ULL << 3)
428 #define BTRFS_BALANCE_RESUME		(1ULL << 4)
429 
430 /*
431  * flags definitions for per-type balance args
432  *
433  * Balance filters
434  *
435  * Used by:
436  * struct btrfs_balance_args
437  */
438 #define BTRFS_BALANCE_ARGS_PROFILES	(1ULL << 0)
439 #define BTRFS_BALANCE_ARGS_USAGE	(1ULL << 1)
440 #define BTRFS_BALANCE_ARGS_DEVID	(1ULL << 2)
441 #define BTRFS_BALANCE_ARGS_DRANGE	(1ULL << 3)
442 #define BTRFS_BALANCE_ARGS_VRANGE	(1ULL << 4)
443 #define BTRFS_BALANCE_ARGS_LIMIT	(1ULL << 5)
444 #define BTRFS_BALANCE_ARGS_LIMIT_RANGE	(1ULL << 6)
445 #define BTRFS_BALANCE_ARGS_STRIPES_RANGE (1ULL << 7)
446 #define BTRFS_BALANCE_ARGS_USAGE_RANGE	(1ULL << 10)
447 
448 #define BTRFS_BALANCE_ARGS_MASK			\
449 	(BTRFS_BALANCE_ARGS_PROFILES |		\
450 	 BTRFS_BALANCE_ARGS_USAGE |		\
451 	 BTRFS_BALANCE_ARGS_DEVID | 		\
452 	 BTRFS_BALANCE_ARGS_DRANGE |		\
453 	 BTRFS_BALANCE_ARGS_VRANGE |		\
454 	 BTRFS_BALANCE_ARGS_LIMIT |		\
455 	 BTRFS_BALANCE_ARGS_LIMIT_RANGE |	\
456 	 BTRFS_BALANCE_ARGS_STRIPES_RANGE |	\
457 	 BTRFS_BALANCE_ARGS_USAGE_RANGE)
458 
459 /*
460  * Profile changing flags.  When SOFT is set we won't relocate chunk if
461  * it already has the target profile (even though it may be
462  * half-filled).
463  */
464 #define BTRFS_BALANCE_ARGS_CONVERT	(1ULL << 8)
465 #define BTRFS_BALANCE_ARGS_SOFT		(1ULL << 9)
466 
467 
468 /*
469  * flags definition for balance state
470  *
471  * Used by:
472  * struct btrfs_ioctl_balance_args.state
473  */
474 #define BTRFS_BALANCE_STATE_RUNNING	(1ULL << 0)
475 #define BTRFS_BALANCE_STATE_PAUSE_REQ	(1ULL << 1)
476 #define BTRFS_BALANCE_STATE_CANCEL_REQ	(1ULL << 2)
477 
478 struct btrfs_ioctl_balance_args {
479 	__u64 flags;				/* in/out */
480 	__u64 state;				/* out */
481 
482 	struct btrfs_balance_args data;		/* in/out */
483 	struct btrfs_balance_args meta;		/* in/out */
484 	struct btrfs_balance_args sys;		/* in/out */
485 
486 	struct btrfs_balance_progress stat;	/* out */
487 
488 	__u64 unused[72];			/* pad to 1k */
489 };
490 
491 #define BTRFS_INO_LOOKUP_PATH_MAX 4080
492 struct btrfs_ioctl_ino_lookup_args {
493 	__u64 treeid;
494 	__u64 objectid;
495 	char name[BTRFS_INO_LOOKUP_PATH_MAX];
496 };
497 
498 #define BTRFS_INO_LOOKUP_USER_PATH_MAX (4080 - BTRFS_VOL_NAME_MAX - 1)
499 struct btrfs_ioctl_ino_lookup_user_args {
500 	/* in, inode number containing the subvolume of 'subvolid' */
501 	__u64 dirid;
502 	/* in */
503 	__u64 treeid;
504 	/* out, name of the subvolume of 'treeid' */
505 	char name[BTRFS_VOL_NAME_MAX + 1];
506 	/*
507 	 * out, constructed path from the directory with which the ioctl is
508 	 * called to dirid
509 	 */
510 	char path[BTRFS_INO_LOOKUP_USER_PATH_MAX];
511 };
512 
513 /* Search criteria for the btrfs SEARCH ioctl family. */
514 struct btrfs_ioctl_search_key {
515 	/*
516 	 * The tree we're searching in. 1 is the tree of tree roots, 2 is the
517 	 * extent tree, etc...
518 	 *
519 	 * A special tree_id value of 0 will cause a search in the subvolume
520 	 * tree that the inode which is passed to the ioctl is part of.
521 	 */
522 	__u64 tree_id;		/* in */
523 
524 	/*
525 	 * When doing a tree search, we're actually taking a slice from a
526 	 * linear search space of 136-bit keys.
527 	 *
528 	 * A full 136-bit tree key is composed as:
529 	 *   (objectid << 72) + (type << 64) + offset
530 	 *
531 	 * The individual min and max values for objectid, type and offset
532 	 * define the min_key and max_key values for the search range. All
533 	 * metadata items with a key in the interval [min_key, max_key] will be
534 	 * returned.
535 	 *
536 	 * Additionally, we can filter the items returned on transaction id of
537 	 * the metadata block they're stored in by specifying a transid range.
538 	 * Be aware that this transaction id only denotes when the metadata
539 	 * page that currently contains the item got written the last time as
540 	 * result of a COW operation.  The number does not have any meaning
541 	 * related to the transaction in which an individual item that is being
542 	 * returned was created or changed.
543 	 */
544 	__u64 min_objectid;	/* in */
545 	__u64 max_objectid;	/* in */
546 	__u64 min_offset;	/* in */
547 	__u64 max_offset;	/* in */
548 	__u64 min_transid;	/* in */
549 	__u64 max_transid;	/* in */
550 	__u32 min_type;		/* in */
551 	__u32 max_type;		/* in */
552 
553 	/*
554 	 * input: The maximum amount of results desired.
555 	 * output: The actual amount of items returned, restricted by any of:
556 	 *  - reaching the upper bound of the search range
557 	 *  - reaching the input nr_items amount of items
558 	 *  - completely filling the supplied memory buffer
559 	 */
560 	__u32 nr_items;		/* in/out */
561 
562 	/* align to 64 bits */
563 	__u32 unused;
564 
565 	/* some extra for later */
566 	__u64 unused1;
567 	__u64 unused2;
568 	__u64 unused3;
569 	__u64 unused4;
570 };
571 
572 struct btrfs_ioctl_search_header {
573 	__u64 transid;
574 	__u64 objectid;
575 	__u64 offset;
576 	__u32 type;
577 	__u32 len;
578 } __attribute__ ((__may_alias__));
579 
580 #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
581 /*
582  * the buf is an array of search headers where
583  * each header is followed by the actual item
584  * the type field is expanded to 32 bits for alignment
585  */
586 struct btrfs_ioctl_search_args {
587 	struct btrfs_ioctl_search_key key;
588 	char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
589 };
590 
591 /*
592  * Extended version of TREE_SEARCH ioctl that can return more than 4k of bytes.
593  * The allocated size of the buffer is set in buf_size.
594  */
595 struct btrfs_ioctl_search_args_v2 {
596 	struct btrfs_ioctl_search_key key; /* in/out - search parameters */
597 	__u64 buf_size;		   /* in - size of buffer
598 					    * out - on EOVERFLOW: needed size
599 					    *       to store item */
600 	__u64 buf[];                       /* out - found items */
601 };
602 
603 /* With a @src_length of zero, the range from @src_offset->EOF is cloned! */
604 struct btrfs_ioctl_clone_range_args {
605 	__s64 src_fd;
606 	__u64 src_offset, src_length;
607 	__u64 dest_offset;
608 };
609 
610 /*
611  * flags definition for the defrag range ioctl
612  *
613  * Used by:
614  * struct btrfs_ioctl_defrag_range_args.flags
615  */
616 #define BTRFS_DEFRAG_RANGE_COMPRESS 1
617 #define BTRFS_DEFRAG_RANGE_START_IO 2
618 #define BTRFS_DEFRAG_RANGE_FLAGS_SUPP	(BTRFS_DEFRAG_RANGE_COMPRESS |		\
619 					 BTRFS_DEFRAG_RANGE_START_IO)
620 
621 struct btrfs_ioctl_defrag_range_args {
622 	/* start of the defrag operation */
623 	__u64 start;
624 
625 	/* number of bytes to defrag, use (u64)-1 to say all */
626 	__u64 len;
627 
628 	/*
629 	 * flags for the operation, which can include turning
630 	 * on compression for this one defrag
631 	 */
632 	__u64 flags;
633 
634 	/*
635 	 * any extent bigger than this will be considered
636 	 * already defragged.  Use 0 to take the kernel default
637 	 * Use 1 to say every single extent must be rewritten
638 	 */
639 	__u32 extent_thresh;
640 
641 	/*
642 	 * which compression method to use if turning on compression
643 	 * for this defrag operation.  If unspecified, zlib will
644 	 * be used
645 	 */
646 	__u32 compress_type;
647 
648 	/* spare for later */
649 	__u32 unused[4];
650 };
651 
652 
653 #define BTRFS_SAME_DATA_DIFFERS	1
654 /* For extent-same ioctl */
655 struct btrfs_ioctl_same_extent_info {
656 	__s64 fd;		/* in - destination file */
657 	__u64 logical_offset;	/* in - start of extent in destination */
658 	__u64 bytes_deduped;	/* out - total # of bytes we were able
659 				 * to dedupe from this file */
660 	/* status of this dedupe operation:
661 	 * 0 if dedup succeeds
662 	 * < 0 for error
663 	 * == BTRFS_SAME_DATA_DIFFERS if data differs
664 	 */
665 	__s32 status;		/* out - see above description */
666 	__u32 reserved;
667 };
668 
669 struct btrfs_ioctl_same_args {
670 	__u64 logical_offset;	/* in - start of extent in source */
671 	__u64 length;		/* in - length of extent */
672 	__u16 dest_count;	/* in - total elements in info array */
673 	__u16 reserved1;
674 	__u32 reserved2;
675 	struct btrfs_ioctl_same_extent_info info[];
676 };
677 
678 struct btrfs_ioctl_space_info {
679 	__u64 flags;
680 	__u64 total_bytes;
681 	__u64 used_bytes;
682 };
683 
684 struct btrfs_ioctl_space_args {
685 	__u64 space_slots;
686 	__u64 total_spaces;
687 	struct btrfs_ioctl_space_info spaces[];
688 };
689 
690 struct btrfs_data_container {
691 	__u32	bytes_left;	/* out -- bytes not needed to deliver output */
692 	__u32	bytes_missing;	/* out -- additional bytes needed for result */
693 	__u32	elem_cnt;	/* out */
694 	__u32	elem_missed;	/* out */
695 	__u64	val[];		/* out */
696 };
697 
698 struct btrfs_ioctl_ino_path_args {
699 	__u64				inum;		/* in */
700 	__u64				size;		/* in */
701 	__u64				reserved[4];
702 	/* struct btrfs_data_container	*fspath;	   out */
703 	__u64				fspath;		/* out */
704 };
705 
706 struct btrfs_ioctl_logical_ino_args {
707 	__u64				logical;	/* in */
708 	__u64				size;		/* in */
709 	__u64				reserved[3];	/* must be 0 for now */
710 	__u64				flags;		/* in, v2 only */
711 	/* struct btrfs_data_container	*inodes;	out   */
712 	__u64				inodes;
713 };
714 
715 /*
716  * Return every ref to the extent, not just those containing logical block.
717  * Requires logical == extent bytenr.
718  */
719 #define BTRFS_LOGICAL_INO_ARGS_IGNORE_OFFSET	(1ULL << 0)
720 
721 enum btrfs_dev_stat_values {
722 	/* disk I/O failure stats */
723 	BTRFS_DEV_STAT_WRITE_ERRS, /* EIO or EREMOTEIO from lower layers */
724 	BTRFS_DEV_STAT_READ_ERRS, /* EIO or EREMOTEIO from lower layers */
725 	BTRFS_DEV_STAT_FLUSH_ERRS, /* EIO or EREMOTEIO from lower layers */
726 
727 	/* stats for indirect indications for I/O failures */
728 	BTRFS_DEV_STAT_CORRUPTION_ERRS, /* checksum error, bytenr error or
729 					 * contents is illegal: this is an
730 					 * indication that the block was damaged
731 					 * during read or write, or written to
732 					 * wrong location or read from wrong
733 					 * location */
734 	BTRFS_DEV_STAT_GENERATION_ERRS, /* an indication that blocks have not
735 					 * been written */
736 
737 	BTRFS_DEV_STAT_VALUES_MAX
738 };
739 
740 /* Reset statistics after reading; needs SYS_ADMIN capability */
741 #define	BTRFS_DEV_STATS_RESET		(1ULL << 0)
742 
743 struct btrfs_ioctl_get_dev_stats {
744 	__u64 devid;				/* in */
745 	__u64 nr_items;				/* in/out */
746 	__u64 flags;				/* in/out */
747 
748 	/* out values: */
749 	__u64 values[BTRFS_DEV_STAT_VALUES_MAX];
750 
751 	/*
752 	 * This pads the struct to 1032 bytes. It was originally meant to pad to
753 	 * 1024 bytes, but when adding the flags field, the padding calculation
754 	 * was not adjusted.
755 	 */
756 	__u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX];
757 };
758 
759 #define BTRFS_QUOTA_CTL_ENABLE	1
760 #define BTRFS_QUOTA_CTL_DISABLE	2
761 #define BTRFS_QUOTA_CTL_RESCAN__NOTUSED	3
762 #define BTRFS_QUOTA_CTL_ENABLE_SIMPLE_QUOTA 4
763 struct btrfs_ioctl_quota_ctl_args {
764 	__u64 cmd;
765 	__u64 status;
766 };
767 
768 struct btrfs_ioctl_quota_rescan_args {
769 	__u64	flags;
770 	__u64   progress;
771 	__u64   reserved[6];
772 };
773 
774 struct btrfs_ioctl_qgroup_assign_args {
775 	__u64 assign;
776 	__u64 src;
777 	__u64 dst;
778 };
779 
780 struct btrfs_ioctl_qgroup_create_args {
781 	__u64 create;
782 	__u64 qgroupid;
783 };
784 struct btrfs_ioctl_timespec {
785 	__u64 sec;
786 	__u32 nsec;
787 };
788 
789 struct btrfs_ioctl_received_subvol_args {
790 	char	uuid[BTRFS_UUID_SIZE];	/* in */
791 	__u64	stransid;		/* in */
792 	__u64	rtransid;		/* out */
793 	struct btrfs_ioctl_timespec stime; /* in */
794 	struct btrfs_ioctl_timespec rtime; /* out */
795 	__u64	flags;			/* in */
796 	__u64	reserved[16];		/* in */
797 };
798 
799 /*
800  * Caller doesn't want file data in the send stream, even if the
801  * search of clone sources doesn't find an extent. UPDATE_EXTENT
802  * commands will be sent instead of WRITE commands.
803  */
804 #define BTRFS_SEND_FLAG_NO_FILE_DATA		0x1
805 
806 /*
807  * Do not add the leading stream header. Used when multiple snapshots
808  * are sent back to back.
809  */
810 #define BTRFS_SEND_FLAG_OMIT_STREAM_HEADER	0x2
811 
812 /*
813  * Omit the command at the end of the stream that indicated the end
814  * of the stream. This option is used when multiple snapshots are
815  * sent back to back.
816  */
817 #define BTRFS_SEND_FLAG_OMIT_END_CMD		0x4
818 
819 /*
820  * Read the protocol version in the structure
821  */
822 #define BTRFS_SEND_FLAG_VERSION			0x8
823 
824 /*
825  * Send compressed data using the ENCODED_WRITE command instead of decompressing
826  * the data and sending it with the WRITE command. This requires protocol
827  * version >= 2.
828  */
829 #define BTRFS_SEND_FLAG_COMPRESSED		0x10
830 
831 #define BTRFS_SEND_FLAG_MASK \
832 	(BTRFS_SEND_FLAG_NO_FILE_DATA | \
833 	 BTRFS_SEND_FLAG_OMIT_STREAM_HEADER | \
834 	 BTRFS_SEND_FLAG_OMIT_END_CMD | \
835 	 BTRFS_SEND_FLAG_VERSION | \
836 	 BTRFS_SEND_FLAG_COMPRESSED)
837 
838 struct btrfs_ioctl_send_args {
839 	__s64 send_fd;			/* in */
840 	__u64 clone_sources_count;	/* in */
841 	__u64 __user *clone_sources;	/* in */
842 	__u64 parent_root;		/* in */
843 	__u64 flags;			/* in */
844 	__u32 version;			/* in */
845 	__u8  reserved[28];		/* in */
846 };
847 
848 /*
849  * Information about a fs tree root.
850  *
851  * All items are filled by the ioctl
852  */
853 struct btrfs_ioctl_get_subvol_info_args {
854 	/* Id of this subvolume */
855 	__u64 treeid;
856 
857 	/* Name of this subvolume, used to get the real name at mount point */
858 	char name[BTRFS_VOL_NAME_MAX + 1];
859 
860 	/*
861 	 * Id of the subvolume which contains this subvolume.
862 	 * Zero for top-level subvolume or a deleted subvolume.
863 	 */
864 	__u64 parent_id;
865 
866 	/*
867 	 * Inode number of the directory which contains this subvolume.
868 	 * Zero for top-level subvolume or a deleted subvolume
869 	 */
870 	__u64 dirid;
871 
872 	/* Latest transaction id of this subvolume */
873 	__u64 generation;
874 
875 	/* Flags of this subvolume */
876 	__u64 flags;
877 
878 	/* UUID of this subvolume */
879 	__u8 uuid[BTRFS_UUID_SIZE];
880 
881 	/*
882 	 * UUID of the subvolume of which this subvolume is a snapshot.
883 	 * All zero for a non-snapshot subvolume.
884 	 */
885 	__u8 parent_uuid[BTRFS_UUID_SIZE];
886 
887 	/*
888 	 * UUID of the subvolume from which this subvolume was received.
889 	 * All zero for non-received subvolume.
890 	 */
891 	__u8 received_uuid[BTRFS_UUID_SIZE];
892 
893 	/* Transaction id indicating when change/create/send/receive happened */
894 	__u64 ctransid;
895 	__u64 otransid;
896 	__u64 stransid;
897 	__u64 rtransid;
898 	/* Time corresponding to c/o/s/rtransid */
899 	struct btrfs_ioctl_timespec ctime;
900 	struct btrfs_ioctl_timespec otime;
901 	struct btrfs_ioctl_timespec stime;
902 	struct btrfs_ioctl_timespec rtime;
903 
904 	/* Must be zero */
905 	__u64 reserved[8];
906 };
907 
908 #define BTRFS_MAX_ROOTREF_BUFFER_NUM 255
909 struct btrfs_ioctl_get_subvol_rootref_args {
910 		/* in/out, minimum id of rootref's treeid to be searched */
911 		__u64 min_treeid;
912 
913 		/* out */
914 		struct {
915 			__u64 treeid;
916 			__u64 dirid;
917 		} rootref[BTRFS_MAX_ROOTREF_BUFFER_NUM];
918 
919 		/* out, number of found items */
920 		__u8 num_items;
921 		__u8 align[7];
922 };
923 
924 /*
925  * Data and metadata for an encoded read or write.
926  *
927  * Encoded I/O bypasses any encoding automatically done by the filesystem (e.g.,
928  * compression). This can be used to read the compressed contents of a file or
929  * write pre-compressed data directly to a file.
930  *
931  * BTRFS_IOC_ENCODED_READ and BTRFS_IOC_ENCODED_WRITE are essentially
932  * preadv/pwritev with additional metadata about how the data is encoded and the
933  * size of the unencoded data.
934  *
935  * BTRFS_IOC_ENCODED_READ fills the given iovecs with the encoded data, fills
936  * the metadata fields, and returns the size of the encoded data. It reads one
937  * extent per call. It can also read data which is not encoded.
938  *
939  * BTRFS_IOC_ENCODED_WRITE uses the metadata fields, writes the encoded data
940  * from the iovecs, and returns the size of the encoded data. Note that the
941  * encoded data is not validated when it is written; if it is not valid (e.g.,
942  * it cannot be decompressed), then a subsequent read may return an error.
943  *
944  * Since the filesystem page cache contains decoded data, encoded I/O bypasses
945  * the page cache. Encoded I/O requires CAP_SYS_ADMIN.
946  */
947 struct btrfs_ioctl_encoded_io_args {
948 	/* Input parameters for both reads and writes. */
949 
950 	/*
951 	 * iovecs containing encoded data.
952 	 *
953 	 * For reads, if the size of the encoded data is larger than the sum of
954 	 * iov[n].iov_len for 0 <= n < iovcnt, then the ioctl fails with
955 	 * ENOBUFS.
956 	 *
957 	 * For writes, the size of the encoded data is the sum of iov[n].iov_len
958 	 * for 0 <= n < iovcnt. This must be less than 128 KiB (this limit may
959 	 * increase in the future). This must also be less than or equal to
960 	 * unencoded_len.
961 	 */
962 	const struct iovec __user *iov;
963 	/* Number of iovecs. */
964 	unsigned long iovcnt;
965 	/*
966 	 * Offset in file.
967 	 *
968 	 * For writes, must be aligned to the sector size of the filesystem.
969 	 */
970 	__s64 offset;
971 	/* Currently must be zero. */
972 	__u64 flags;
973 
974 	/*
975 	 * For reads, the following members are output parameters that will
976 	 * contain the returned metadata for the encoded data.
977 	 * For writes, the following members must be set to the metadata for the
978 	 * encoded data.
979 	 */
980 
981 	/*
982 	 * Length of the data in the file.
983 	 *
984 	 * Must be less than or equal to unencoded_len - unencoded_offset. For
985 	 * writes, must be aligned to the sector size of the filesystem unless
986 	 * the data ends at or beyond the current end of the file.
987 	 */
988 	__u64 len;
989 	/*
990 	 * Length of the unencoded (i.e., decrypted and decompressed) data.
991 	 *
992 	 * For writes, must be no more than 128 KiB (this limit may increase in
993 	 * the future). If the unencoded data is actually longer than
994 	 * unencoded_len, then it is truncated; if it is shorter, then it is
995 	 * extended with zeroes.
996 	 */
997 	__u64 unencoded_len;
998 	/*
999 	 * Offset from the first byte of the unencoded data to the first byte of
1000 	 * logical data in the file.
1001 	 *
1002 	 * Must be less than unencoded_len.
1003 	 */
1004 	__u64 unencoded_offset;
1005 	/*
1006 	 * BTRFS_ENCODED_IO_COMPRESSION_* type.
1007 	 *
1008 	 * For writes, must not be BTRFS_ENCODED_IO_COMPRESSION_NONE.
1009 	 */
1010 	__u32 compression;
1011 	/* Currently always BTRFS_ENCODED_IO_ENCRYPTION_NONE. */
1012 	__u32 encryption;
1013 	/*
1014 	 * Reserved for future expansion.
1015 	 *
1016 	 * For reads, always returned as zero. Users should check for non-zero
1017 	 * bytes. If there are any, then the kernel has a newer version of this
1018 	 * structure with additional information that the user definition is
1019 	 * missing.
1020 	 *
1021 	 * For writes, must be zeroed.
1022 	 */
1023 	__u8 reserved[64];
1024 };
1025 
1026 /* Data is not compressed. */
1027 #define BTRFS_ENCODED_IO_COMPRESSION_NONE 0
1028 /* Data is compressed as a single zlib stream. */
1029 #define BTRFS_ENCODED_IO_COMPRESSION_ZLIB 1
1030 /*
1031  * Data is compressed as a single zstd frame with the windowLog compression
1032  * parameter set to no more than 17.
1033  */
1034 #define BTRFS_ENCODED_IO_COMPRESSION_ZSTD 2
1035 /*
1036  * Data is compressed sector by sector (using the sector size indicated by the
1037  * name of the constant) with LZO1X and wrapped in the format documented in
1038  * fs/btrfs/lzo.c. For writes, the compression sector size must match the
1039  * filesystem sector size.
1040  */
1041 #define BTRFS_ENCODED_IO_COMPRESSION_LZO_4K 3
1042 #define BTRFS_ENCODED_IO_COMPRESSION_LZO_8K 4
1043 #define BTRFS_ENCODED_IO_COMPRESSION_LZO_16K 5
1044 #define BTRFS_ENCODED_IO_COMPRESSION_LZO_32K 6
1045 #define BTRFS_ENCODED_IO_COMPRESSION_LZO_64K 7
1046 #define BTRFS_ENCODED_IO_COMPRESSION_TYPES 8
1047 
1048 /* Data is not encrypted. */
1049 #define BTRFS_ENCODED_IO_ENCRYPTION_NONE 0
1050 #define BTRFS_ENCODED_IO_ENCRYPTION_TYPES 1
1051 
1052 /* Error codes as returned by the kernel */
1053 enum btrfs_err_code {
1054 	BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET = 1,
1055 	BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET,
1056 	BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET,
1057 	BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET,
1058 	BTRFS_ERROR_DEV_TGT_REPLACE,
1059 	BTRFS_ERROR_DEV_MISSING_NOT_FOUND,
1060 	BTRFS_ERROR_DEV_ONLY_WRITABLE,
1061 	BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS,
1062 	BTRFS_ERROR_DEV_RAID1C3_MIN_NOT_MET,
1063 	BTRFS_ERROR_DEV_RAID1C4_MIN_NOT_MET,
1064 };
1065 
1066 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
1067 				   struct btrfs_ioctl_vol_args)
1068 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
1069 				   struct btrfs_ioctl_vol_args)
1070 #define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
1071 				   struct btrfs_ioctl_vol_args)
1072 #define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
1073 				   struct btrfs_ioctl_vol_args)
1074 #define BTRFS_IOC_FORGET_DEV _IOW(BTRFS_IOCTL_MAGIC, 5, \
1075 				   struct btrfs_ioctl_vol_args)
1076 /* trans start and trans end are dangerous, and only for
1077  * use by applications that know how to avoid the
1078  * resulting deadlocks
1079  */
1080 #define BTRFS_IOC_TRANS_START  _IO(BTRFS_IOCTL_MAGIC, 6)
1081 #define BTRFS_IOC_TRANS_END    _IO(BTRFS_IOCTL_MAGIC, 7)
1082 #define BTRFS_IOC_SYNC         _IO(BTRFS_IOCTL_MAGIC, 8)
1083 
1084 #define BTRFS_IOC_CLONE        _IOW(BTRFS_IOCTL_MAGIC, 9, int)
1085 #define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
1086 				   struct btrfs_ioctl_vol_args)
1087 #define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
1088 				   struct btrfs_ioctl_vol_args)
1089 #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
1090 				   struct btrfs_ioctl_vol_args)
1091 
1092 #define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
1093 				  struct btrfs_ioctl_clone_range_args)
1094 
1095 #define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
1096 				   struct btrfs_ioctl_vol_args)
1097 #define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
1098 				struct btrfs_ioctl_vol_args)
1099 #define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
1100 				struct btrfs_ioctl_defrag_range_args)
1101 #define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
1102 				   struct btrfs_ioctl_search_args)
1103 #define BTRFS_IOC_TREE_SEARCH_V2 _IOWR(BTRFS_IOCTL_MAGIC, 17, \
1104 					   struct btrfs_ioctl_search_args_v2)
1105 #define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
1106 				   struct btrfs_ioctl_ino_lookup_args)
1107 #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, __u64)
1108 #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
1109 				    struct btrfs_ioctl_space_args)
1110 #define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
1111 #define BTRFS_IOC_WAIT_SYNC  _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
1112 #define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
1113 				   struct btrfs_ioctl_vol_args_v2)
1114 #define BTRFS_IOC_SUBVOL_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 24, \
1115 				   struct btrfs_ioctl_vol_args_v2)
1116 #define BTRFS_IOC_SUBVOL_GETFLAGS _IOR(BTRFS_IOCTL_MAGIC, 25, __u64)
1117 #define BTRFS_IOC_SUBVOL_SETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 26, __u64)
1118 #define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \
1119 			      struct btrfs_ioctl_scrub_args)
1120 #define BTRFS_IOC_SCRUB_CANCEL _IO(BTRFS_IOCTL_MAGIC, 28)
1121 #define BTRFS_IOC_SCRUB_PROGRESS _IOWR(BTRFS_IOCTL_MAGIC, 29, \
1122 				       struct btrfs_ioctl_scrub_args)
1123 #define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \
1124 				 struct btrfs_ioctl_dev_info_args)
1125 #define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \
1126 			       struct btrfs_ioctl_fs_info_args)
1127 #define BTRFS_IOC_BALANCE_V2 _IOWR(BTRFS_IOCTL_MAGIC, 32, \
1128 				   struct btrfs_ioctl_balance_args)
1129 #define BTRFS_IOC_BALANCE_CTL _IOW(BTRFS_IOCTL_MAGIC, 33, int)
1130 #define BTRFS_IOC_BALANCE_PROGRESS _IOR(BTRFS_IOCTL_MAGIC, 34, \
1131 					struct btrfs_ioctl_balance_args)
1132 #define BTRFS_IOC_INO_PATHS _IOWR(BTRFS_IOCTL_MAGIC, 35, \
1133 					struct btrfs_ioctl_ino_path_args)
1134 #define BTRFS_IOC_LOGICAL_INO _IOWR(BTRFS_IOCTL_MAGIC, 36, \
1135 					struct btrfs_ioctl_logical_ino_args)
1136 #define BTRFS_IOC_SET_RECEIVED_SUBVOL _IOWR(BTRFS_IOCTL_MAGIC, 37, \
1137 				struct btrfs_ioctl_received_subvol_args)
1138 #define BTRFS_IOC_SEND _IOW(BTRFS_IOCTL_MAGIC, 38, struct btrfs_ioctl_send_args)
1139 #define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \
1140 				     struct btrfs_ioctl_vol_args)
1141 #define BTRFS_IOC_QUOTA_CTL _IOWR(BTRFS_IOCTL_MAGIC, 40, \
1142 			       struct btrfs_ioctl_quota_ctl_args)
1143 #define BTRFS_IOC_QGROUP_ASSIGN _IOW(BTRFS_IOCTL_MAGIC, 41, \
1144 			       struct btrfs_ioctl_qgroup_assign_args)
1145 #define BTRFS_IOC_QGROUP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 42, \
1146 			       struct btrfs_ioctl_qgroup_create_args)
1147 #define BTRFS_IOC_QGROUP_LIMIT _IOR(BTRFS_IOCTL_MAGIC, 43, \
1148 			       struct btrfs_ioctl_qgroup_limit_args)
1149 #define BTRFS_IOC_QUOTA_RESCAN _IOW(BTRFS_IOCTL_MAGIC, 44, \
1150 			       struct btrfs_ioctl_quota_rescan_args)
1151 #define BTRFS_IOC_QUOTA_RESCAN_STATUS _IOR(BTRFS_IOCTL_MAGIC, 45, \
1152 			       struct btrfs_ioctl_quota_rescan_args)
1153 #define BTRFS_IOC_QUOTA_RESCAN_WAIT _IO(BTRFS_IOCTL_MAGIC, 46)
1154 #define BTRFS_IOC_GET_FSLABEL 	FS_IOC_GETFSLABEL
1155 #define BTRFS_IOC_SET_FSLABEL	FS_IOC_SETFSLABEL
1156 #define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \
1157 				      struct btrfs_ioctl_get_dev_stats)
1158 #define BTRFS_IOC_DEV_REPLACE _IOWR(BTRFS_IOCTL_MAGIC, 53, \
1159 				    struct btrfs_ioctl_dev_replace_args)
1160 #define BTRFS_IOC_FILE_EXTENT_SAME _IOWR(BTRFS_IOCTL_MAGIC, 54, \
1161 					 struct btrfs_ioctl_same_args)
1162 #define BTRFS_IOC_GET_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
1163 				   struct btrfs_ioctl_feature_flags)
1164 #define BTRFS_IOC_SET_FEATURES _IOW(BTRFS_IOCTL_MAGIC, 57, \
1165 				   struct btrfs_ioctl_feature_flags[2])
1166 #define BTRFS_IOC_GET_SUPPORTED_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
1167 				   struct btrfs_ioctl_feature_flags[3])
1168 #define BTRFS_IOC_RM_DEV_V2 _IOW(BTRFS_IOCTL_MAGIC, 58, \
1169 				   struct btrfs_ioctl_vol_args_v2)
1170 #define BTRFS_IOC_LOGICAL_INO_V2 _IOWR(BTRFS_IOCTL_MAGIC, 59, \
1171 					struct btrfs_ioctl_logical_ino_args)
1172 #define BTRFS_IOC_GET_SUBVOL_INFO _IOR(BTRFS_IOCTL_MAGIC, 60, \
1173 				struct btrfs_ioctl_get_subvol_info_args)
1174 #define BTRFS_IOC_GET_SUBVOL_ROOTREF _IOWR(BTRFS_IOCTL_MAGIC, 61, \
1175 				struct btrfs_ioctl_get_subvol_rootref_args)
1176 #define BTRFS_IOC_INO_LOOKUP_USER _IOWR(BTRFS_IOCTL_MAGIC, 62, \
1177 				struct btrfs_ioctl_ino_lookup_user_args)
1178 #define BTRFS_IOC_SNAP_DESTROY_V2 _IOW(BTRFS_IOCTL_MAGIC, 63, \
1179 				struct btrfs_ioctl_vol_args_v2)
1180 #define BTRFS_IOC_ENCODED_READ _IOR(BTRFS_IOCTL_MAGIC, 64, \
1181 				    struct btrfs_ioctl_encoded_io_args)
1182 #define BTRFS_IOC_ENCODED_WRITE _IOW(BTRFS_IOCTL_MAGIC, 64, \
1183 				     struct btrfs_ioctl_encoded_io_args)
1184 
1185 #ifdef __cplusplus
1186 }
1187 #endif
1188 
1189 #endif /* _UAPI_LINUX_BTRFS_H */
1190