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6cbd5570 CM |
1 | /* |
2 | * Copyright (C) 2007 Oracle. All rights reserved. | |
3 | * | |
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. | |
7 | * | |
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. | |
12 | * | |
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. | |
17 | */ | |
18 | ||
dc17ff8f CM |
19 | #ifndef __BTRFS_CTREE__ |
20 | #define __BTRFS_CTREE__ | |
eb60ceac | 21 | |
810191ff CM |
22 | #include <linux/mm.h> |
23 | #include <linux/highmem.h> | |
e20d96d6 | 24 | #include <linux/fs.h> |
a2de733c | 25 | #include <linux/rwsem.h> |
803b2f54 | 26 | #include <linux/semaphore.h> |
58176a96 | 27 | #include <linux/completion.h> |
04160088 | 28 | #include <linux/backing-dev.h> |
e6dcd2dc | 29 | #include <linux/wait.h> |
5a0e3ad6 | 30 | #include <linux/slab.h> |
f8b18087 | 31 | #include <linux/kobject.h> |
1abe9b8a | 32 | #include <trace/events/btrfs.h> |
479965d6 | 33 | #include <asm/kmap_types.h> |
3b16a4e3 | 34 | #include <linux/pagemap.h> |
55e301fd | 35 | #include <linux/btrfs.h> |
21c7e756 | 36 | #include <linux/workqueue.h> |
d1310b2e | 37 | #include "extent_io.h" |
5f39d397 | 38 | #include "extent_map.h" |
8b712842 | 39 | #include "async-thread.h" |
e20d96d6 | 40 | |
e089f05c | 41 | struct btrfs_trans_handle; |
79154b1b | 42 | struct btrfs_transaction; |
a22285a6 | 43 | struct btrfs_pending_snapshot; |
35b7e476 CM |
44 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
45 | extern struct kmem_cache *btrfs_transaction_cachep; | |
46 | extern struct kmem_cache *btrfs_bit_radix_cachep; | |
2c90e5d6 | 47 | extern struct kmem_cache *btrfs_path_cachep; |
dc89e982 | 48 | extern struct kmem_cache *btrfs_free_space_cachep; |
e6dcd2dc | 49 | struct btrfs_ordered_sum; |
e089f05c | 50 | |
294e30fe JB |
51 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
52 | #define STATIC noinline | |
53 | #else | |
54 | #define STATIC static noinline | |
55 | #endif | |
56 | ||
cdb4c574 | 57 | #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ |
eb60ceac | 58 | |
72d7aefc | 59 | #define BTRFS_MAX_MIRRORS 3 |
94598ba8 | 60 | |
4008c04a | 61 | #define BTRFS_MAX_LEVEL 8 |
0b86a832 | 62 | |
5d4f98a2 YZ |
63 | #define BTRFS_COMPAT_EXTENT_TREE_V0 |
64 | ||
5a3f23d5 CM |
65 | /* |
66 | * files bigger than this get some pre-flushing when they are added | |
67 | * to the ordered operations list. That way we limit the total | |
68 | * work done by the commit | |
69 | */ | |
70 | #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024) | |
71 | ||
0b86a832 | 72 | /* holds pointers to all of the tree roots */ |
6407bf6d | 73 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
0b86a832 CM |
74 | |
75 | /* stores information about which extents are in use, and reference counts */ | |
0cf6c620 | 76 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
0b86a832 | 77 | |
0b86a832 CM |
78 | /* |
79 | * chunk tree stores translations from logical -> physical block numbering | |
80 | * the super block points to the chunk tree | |
81 | */ | |
e085def2 | 82 | #define BTRFS_CHUNK_TREE_OBJECTID 3ULL |
0b86a832 CM |
83 | |
84 | /* | |
85 | * stores information about which areas of a given device are in use. | |
86 | * one per device. The tree of tree roots points to the device tree | |
87 | */ | |
e085def2 CM |
88 | #define BTRFS_DEV_TREE_OBJECTID 4ULL |
89 | ||
90 | /* one per subvolume, storing files and directories */ | |
91 | #define BTRFS_FS_TREE_OBJECTID 5ULL | |
92 | ||
93 | /* directory objectid inside the root tree */ | |
94 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL | |
0b86a832 | 95 | |
d20f7043 CM |
96 | /* holds checksums of all the data extents */ |
97 | #define BTRFS_CSUM_TREE_OBJECTID 7ULL | |
98 | ||
630dc772 AJ |
99 | /* holds quota configuration and tracking */ |
100 | #define BTRFS_QUOTA_TREE_OBJECTID 8ULL | |
101 | ||
07b30a49 SB |
102 | /* for storing items that use the BTRFS_UUID_KEY* types */ |
103 | #define BTRFS_UUID_TREE_OBJECTID 9ULL | |
104 | ||
60b62978 DS |
105 | /* for storing balance parameters in the root tree */ |
106 | #define BTRFS_BALANCE_OBJECTID -4ULL | |
107 | ||
7b128766 JB |
108 | /* orhpan objectid for tracking unlinked/truncated files */ |
109 | #define BTRFS_ORPHAN_OBJECTID -5ULL | |
110 | ||
e02119d5 CM |
111 | /* does write ahead logging to speed up fsyncs */ |
112 | #define BTRFS_TREE_LOG_OBJECTID -6ULL | |
113 | #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL | |
114 | ||
e4657689 ZY |
115 | /* for space balancing */ |
116 | #define BTRFS_TREE_RELOC_OBJECTID -8ULL | |
117 | #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL | |
118 | ||
d20f7043 CM |
119 | /* |
120 | * extent checksums all have this objectid | |
121 | * this allows them to share the logging tree | |
122 | * for fsyncs | |
123 | */ | |
124 | #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL | |
125 | ||
0af3d00b JB |
126 | /* For storing free space cache */ |
127 | #define BTRFS_FREE_SPACE_OBJECTID -11ULL | |
128 | ||
82d5902d | 129 | /* |
527a1361 | 130 | * The inode number assigned to the special inode for storing |
82d5902d LZ |
131 | * free ino cache |
132 | */ | |
133 | #define BTRFS_FREE_INO_OBJECTID -12ULL | |
134 | ||
31840ae1 ZY |
135 | /* dummy objectid represents multiple objectids */ |
136 | #define BTRFS_MULTIPLE_OBJECTIDS -255ULL | |
137 | ||
0b86a832 | 138 | /* |
6527cdbe | 139 | * All files have objectids in this range. |
0b86a832 | 140 | */ |
f6dbff55 | 141 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
6527cdbe | 142 | #define BTRFS_LAST_FREE_OBJECTID -256ULL |
e17cade2 | 143 | #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL |
3768f368 | 144 | |
0b86a832 CM |
145 | |
146 | /* | |
147 | * the device items go into the chunk tree. The key is in the form | |
148 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] | |
149 | */ | |
150 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL | |
151 | ||
4df27c4d YZ |
152 | #define BTRFS_BTREE_INODE_OBJECTID 1 |
153 | ||
154 | #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2 | |
155 | ||
6e71c47a | 156 | #define BTRFS_DEV_REPLACE_DEVID 0ULL |
e93c89c1 | 157 | |
727011e0 CM |
158 | /* |
159 | * the max metadata block size. This limit is somewhat artificial, | |
160 | * but the memmove costs go through the roof for larger blocks. | |
161 | */ | |
162 | #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 | |
163 | ||
e20d96d6 CM |
164 | /* |
165 | * we can actually store much bigger names, but lets not confuse the rest | |
166 | * of linux | |
167 | */ | |
168 | #define BTRFS_NAME_LEN 255 | |
169 | ||
f186373f MF |
170 | /* |
171 | * Theoretical limit is larger, but we keep this down to a sane | |
172 | * value. That should limit greatly the possibility of collisions on | |
173 | * inode ref items. | |
174 | */ | |
175 | #define BTRFS_LINK_MAX 65535U | |
176 | ||
f254e52c CM |
177 | /* 32 bytes in various csum fields */ |
178 | #define BTRFS_CSUM_SIZE 32 | |
607d432d JB |
179 | |
180 | /* csum types */ | |
181 | #define BTRFS_CSUM_TYPE_CRC32 0 | |
182 | ||
183 | static int btrfs_csum_sizes[] = { 4, 0 }; | |
184 | ||
509659cd | 185 | /* four bytes for CRC32 */ |
3954401f | 186 | #define BTRFS_EMPTY_DIR_SIZE 0 |
f254e52c | 187 | |
29a8d9a0 SB |
188 | /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */ |
189 | #define REQ_GET_READ_MIRRORS (1 << 30) | |
190 | ||
fabb5681 CM |
191 | #define BTRFS_FT_UNKNOWN 0 |
192 | #define BTRFS_FT_REG_FILE 1 | |
193 | #define BTRFS_FT_DIR 2 | |
194 | #define BTRFS_FT_CHRDEV 3 | |
195 | #define BTRFS_FT_BLKDEV 4 | |
196 | #define BTRFS_FT_FIFO 5 | |
197 | #define BTRFS_FT_SOCK 6 | |
198 | #define BTRFS_FT_SYMLINK 7 | |
5103e947 JB |
199 | #define BTRFS_FT_XATTR 8 |
200 | #define BTRFS_FT_MAX 9 | |
fabb5681 | 201 | |
3d136a11 SB |
202 | /* ioprio of readahead is set to idle */ |
203 | #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) | |
204 | ||
e2d84521 MX |
205 | #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024) |
206 | ||
fec577fb | 207 | /* |
d4a78947 WF |
208 | * The key defines the order in the tree, and so it also defines (optimal) |
209 | * block layout. | |
210 | * | |
211 | * objectid corresponds to the inode number. | |
212 | * | |
213 | * type tells us things about the object, and is a kind of stream selector. | |
214 | * so for a given inode, keys with type of 1 might refer to the inode data, | |
215 | * type of 2 may point to file data in the btree and type == 3 may point to | |
216 | * extents. | |
fec577fb CM |
217 | * |
218 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
219 | * |
220 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
221 | * in cpu native order. Otherwise they are identical and their sizes | |
222 | * should be the same (ie both packed) | |
fec577fb | 223 | */ |
e2fa7227 CM |
224 | struct btrfs_disk_key { |
225 | __le64 objectid; | |
5f39d397 | 226 | u8 type; |
70b2befd | 227 | __le64 offset; |
e2fa7227 CM |
228 | } __attribute__ ((__packed__)); |
229 | ||
230 | struct btrfs_key { | |
eb60ceac | 231 | u64 objectid; |
5f39d397 | 232 | u8 type; |
70b2befd | 233 | u64 offset; |
eb60ceac CM |
234 | } __attribute__ ((__packed__)); |
235 | ||
0b86a832 CM |
236 | struct btrfs_mapping_tree { |
237 | struct extent_map_tree map_tree; | |
238 | }; | |
239 | ||
0b86a832 CM |
240 | struct btrfs_dev_item { |
241 | /* the internal btrfs device id */ | |
242 | __le64 devid; | |
243 | ||
244 | /* size of the device */ | |
245 | __le64 total_bytes; | |
246 | ||
247 | /* bytes used */ | |
248 | __le64 bytes_used; | |
249 | ||
250 | /* optimal io alignment for this device */ | |
251 | __le32 io_align; | |
252 | ||
253 | /* optimal io width for this device */ | |
254 | __le32 io_width; | |
255 | ||
256 | /* minimal io size for this device */ | |
257 | __le32 sector_size; | |
258 | ||
0b86a832 CM |
259 | /* type and info about this device */ |
260 | __le64 type; | |
261 | ||
2b82032c YZ |
262 | /* expected generation for this device */ |
263 | __le64 generation; | |
264 | ||
c3027eb5 CM |
265 | /* |
266 | * starting byte of this partition on the device, | |
d4a78947 | 267 | * to allow for stripe alignment in the future |
c3027eb5 CM |
268 | */ |
269 | __le64 start_offset; | |
270 | ||
e17cade2 CM |
271 | /* grouping information for allocation decisions */ |
272 | __le32 dev_group; | |
273 | ||
274 | /* seek speed 0-100 where 100 is fastest */ | |
275 | u8 seek_speed; | |
276 | ||
277 | /* bandwidth 0-100 where 100 is fastest */ | |
278 | u8 bandwidth; | |
279 | ||
0d81ba5d | 280 | /* btrfs generated uuid for this device */ |
e17cade2 | 281 | u8 uuid[BTRFS_UUID_SIZE]; |
2b82032c YZ |
282 | |
283 | /* uuid of FS who owns this device */ | |
284 | u8 fsid[BTRFS_UUID_SIZE]; | |
0b86a832 CM |
285 | } __attribute__ ((__packed__)); |
286 | ||
287 | struct btrfs_stripe { | |
288 | __le64 devid; | |
289 | __le64 offset; | |
e17cade2 | 290 | u8 dev_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
291 | } __attribute__ ((__packed__)); |
292 | ||
293 | struct btrfs_chunk { | |
e17cade2 CM |
294 | /* size of this chunk in bytes */ |
295 | __le64 length; | |
296 | ||
297 | /* objectid of the root referencing this chunk */ | |
0b86a832 | 298 | __le64 owner; |
e17cade2 | 299 | |
0b86a832 CM |
300 | __le64 stripe_len; |
301 | __le64 type; | |
302 | ||
303 | /* optimal io alignment for this chunk */ | |
304 | __le32 io_align; | |
305 | ||
306 | /* optimal io width for this chunk */ | |
307 | __le32 io_width; | |
308 | ||
309 | /* minimal io size for this chunk */ | |
310 | __le32 sector_size; | |
311 | ||
312 | /* 2^16 stripes is quite a lot, a second limit is the size of a single | |
313 | * item in the btree | |
314 | */ | |
315 | __le16 num_stripes; | |
321aecc6 CM |
316 | |
317 | /* sub stripes only matter for raid10 */ | |
318 | __le16 sub_stripes; | |
0b86a832 CM |
319 | struct btrfs_stripe stripe; |
320 | /* additional stripes go here */ | |
321 | } __attribute__ ((__packed__)); | |
322 | ||
0af3d00b JB |
323 | #define BTRFS_FREE_SPACE_EXTENT 1 |
324 | #define BTRFS_FREE_SPACE_BITMAP 2 | |
325 | ||
326 | struct btrfs_free_space_entry { | |
327 | __le64 offset; | |
328 | __le64 bytes; | |
329 | u8 type; | |
330 | } __attribute__ ((__packed__)); | |
331 | ||
332 | struct btrfs_free_space_header { | |
333 | struct btrfs_disk_key location; | |
334 | __le64 generation; | |
335 | __le64 num_entries; | |
336 | __le64 num_bitmaps; | |
337 | } __attribute__ ((__packed__)); | |
338 | ||
0b86a832 CM |
339 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) |
340 | { | |
341 | BUG_ON(num_stripes == 0); | |
342 | return sizeof(struct btrfs_chunk) + | |
343 | sizeof(struct btrfs_stripe) * (num_stripes - 1); | |
344 | } | |
345 | ||
5d4f98a2 YZ |
346 | #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) |
347 | #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) | |
acce952b | 348 | |
349 | /* | |
350 | * File system states | |
351 | */ | |
87533c47 | 352 | #define BTRFS_FS_STATE_ERROR 0 |
dc81cdc5 | 353 | #define BTRFS_FS_STATE_REMOUNTING 1 |
08748810 | 354 | #define BTRFS_FS_STATE_TRANS_ABORTED 2 |
c404e0dc | 355 | #define BTRFS_FS_STATE_DEV_REPLACING 3 |
acce952b | 356 | |
87533c47 | 357 | /* Super block flags */ |
acce952b | 358 | /* Errors detected */ |
359 | #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2) | |
360 | ||
5d4f98a2 YZ |
361 | #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32) |
362 | #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33) | |
363 | ||
364 | #define BTRFS_BACKREF_REV_MAX 256 | |
365 | #define BTRFS_BACKREF_REV_SHIFT 56 | |
366 | #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ | |
367 | BTRFS_BACKREF_REV_SHIFT) | |
368 | ||
369 | #define BTRFS_OLD_BACKREF_REV 0 | |
370 | #define BTRFS_MIXED_BACKREF_REV 1 | |
63b10fc4 | 371 | |
fec577fb CM |
372 | /* |
373 | * every tree block (leaf or node) starts with this header. | |
374 | */ | |
bb492bb0 | 375 | struct btrfs_header { |
e17cade2 | 376 | /* these first four must match the super block */ |
f254e52c | 377 | u8 csum[BTRFS_CSUM_SIZE]; |
5f39d397 | 378 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 379 | __le64 bytenr; /* which block this node is supposed to live in */ |
63b10fc4 | 380 | __le64 flags; |
e17cade2 CM |
381 | |
382 | /* allowed to be different from the super from here on down */ | |
383 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; | |
7f5c1516 | 384 | __le64 generation; |
4d775673 | 385 | __le64 owner; |
5f39d397 | 386 | __le32 nritems; |
9a6f11ed | 387 | u8 level; |
eb60ceac CM |
388 | } __attribute__ ((__packed__)); |
389 | ||
5f39d397 | 390 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
d397712b CM |
391 | sizeof(struct btrfs_header)) / \ |
392 | sizeof(struct btrfs_key_ptr)) | |
123abc88 | 393 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
5f39d397 | 394 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
236454df CM |
395 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
396 | sizeof(struct btrfs_item) - \ | |
397 | sizeof(struct btrfs_file_extent_item)) | |
f34f57a3 YZ |
398 | #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
399 | sizeof(struct btrfs_item) -\ | |
400 | sizeof(struct btrfs_dir_item)) | |
eb60ceac | 401 | |
0b86a832 CM |
402 | |
403 | /* | |
404 | * this is a very generous portion of the super block, giving us | |
405 | * room to translate 14 chunks with 3 stripes each. | |
406 | */ | |
407 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 | |
7ae9c09d | 408 | #define BTRFS_LABEL_SIZE 256 |
0b86a832 | 409 | |
af31f5e5 CM |
410 | /* |
411 | * just in case we somehow lose the roots and are not able to mount, | |
412 | * we store an array of the roots from previous transactions | |
413 | * in the super. | |
414 | */ | |
415 | #define BTRFS_NUM_BACKUP_ROOTS 4 | |
416 | struct btrfs_root_backup { | |
417 | __le64 tree_root; | |
418 | __le64 tree_root_gen; | |
419 | ||
420 | __le64 chunk_root; | |
421 | __le64 chunk_root_gen; | |
422 | ||
423 | __le64 extent_root; | |
424 | __le64 extent_root_gen; | |
425 | ||
426 | __le64 fs_root; | |
427 | __le64 fs_root_gen; | |
428 | ||
429 | __le64 dev_root; | |
430 | __le64 dev_root_gen; | |
431 | ||
432 | __le64 csum_root; | |
433 | __le64 csum_root_gen; | |
434 | ||
435 | __le64 total_bytes; | |
436 | __le64 bytes_used; | |
437 | __le64 num_devices; | |
438 | /* future */ | |
d1423248 | 439 | __le64 unused_64[4]; |
af31f5e5 CM |
440 | |
441 | u8 tree_root_level; | |
442 | u8 chunk_root_level; | |
443 | u8 extent_root_level; | |
444 | u8 fs_root_level; | |
445 | u8 dev_root_level; | |
446 | u8 csum_root_level; | |
447 | /* future and to align */ | |
448 | u8 unused_8[10]; | |
449 | } __attribute__ ((__packed__)); | |
450 | ||
fec577fb CM |
451 | /* |
452 | * the super block basically lists the main trees of the FS | |
453 | * it currently lacks any block count etc etc | |
454 | */ | |
234b63a0 | 455 | struct btrfs_super_block { |
f254e52c | 456 | u8 csum[BTRFS_CSUM_SIZE]; |
63b10fc4 | 457 | /* the first 4 fields must match struct btrfs_header */ |
2b82032c | 458 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 459 | __le64 bytenr; /* this block number */ |
63b10fc4 | 460 | __le64 flags; |
e17cade2 CM |
461 | |
462 | /* allowed to be different from the btrfs_header from here own down */ | |
3768f368 | 463 | __le64 magic; |
3768f368 CM |
464 | __le64 generation; |
465 | __le64 root; | |
0b86a832 | 466 | __le64 chunk_root; |
e02119d5 | 467 | __le64 log_root; |
c3027eb5 CM |
468 | |
469 | /* this will help find the new super based on the log root */ | |
470 | __le64 log_root_transid; | |
db94535d CM |
471 | __le64 total_bytes; |
472 | __le64 bytes_used; | |
2e635a27 | 473 | __le64 root_dir_objectid; |
8a4b83cc | 474 | __le64 num_devices; |
5f39d397 CM |
475 | __le32 sectorsize; |
476 | __le32 nodesize; | |
477 | __le32 leafsize; | |
87ee04eb | 478 | __le32 stripesize; |
0b86a832 | 479 | __le32 sys_chunk_array_size; |
84234f3a | 480 | __le64 chunk_root_generation; |
f2b636e8 JB |
481 | __le64 compat_flags; |
482 | __le64 compat_ro_flags; | |
483 | __le64 incompat_flags; | |
607d432d | 484 | __le16 csum_type; |
db94535d | 485 | u8 root_level; |
0b86a832 | 486 | u8 chunk_root_level; |
e02119d5 | 487 | u8 log_root_level; |
0d81ba5d | 488 | struct btrfs_dev_item dev_item; |
c3027eb5 | 489 | |
7ae9c09d | 490 | char label[BTRFS_LABEL_SIZE]; |
c3027eb5 | 491 | |
0af3d00b | 492 | __le64 cache_generation; |
26432799 | 493 | __le64 uuid_tree_generation; |
0af3d00b | 494 | |
c3027eb5 | 495 | /* future expansion */ |
26432799 | 496 | __le64 reserved[30]; |
0b86a832 | 497 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
af31f5e5 | 498 | struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; |
cfaa7295 CM |
499 | } __attribute__ ((__packed__)); |
500 | ||
f2b636e8 JB |
501 | /* |
502 | * Compat flags that we support. If any incompat flags are set other than the | |
503 | * ones specified below then we will fail to mount | |
504 | */ | |
5d4f98a2 | 505 | #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) |
0af3d00b | 506 | #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1) |
67377734 | 507 | #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2) |
a6fa6fae | 508 | #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3) |
727011e0 CM |
509 | /* |
510 | * some patches floated around with a second compression method | |
511 | * lets save that incompat here for when they do get in | |
512 | * Note we don't actually support it, we're just reserving the | |
513 | * number | |
514 | */ | |
515 | #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4) | |
516 | ||
517 | /* | |
518 | * older kernels tried to do bigger metadata blocks, but the | |
519 | * code was pretty buggy. Lets not let them try anymore. | |
520 | */ | |
521 | #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5) | |
5d4f98a2 | 522 | |
f186373f | 523 | #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6) |
53b381b3 | 524 | #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7) |
3173a18f | 525 | #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8) |
16e7549f | 526 | #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9) |
f186373f | 527 | |
5d4f98a2 | 528 | #define BTRFS_FEATURE_COMPAT_SUPP 0ULL |
2eaa055f JM |
529 | #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL |
530 | #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL | |
5d4f98a2 | 531 | #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL |
2eaa055f JM |
532 | #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL |
533 | #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL | |
534 | ||
0af3d00b JB |
535 | #define BTRFS_FEATURE_INCOMPAT_SUPP \ |
536 | (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ | |
67377734 | 537 | BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ |
a6fa6fae | 538 | BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ |
727011e0 | 539 | BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ |
f186373f | 540 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ |
53b381b3 | 541 | BTRFS_FEATURE_INCOMPAT_RAID56 | \ |
3173a18f | 542 | BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ |
16e7549f JB |
543 | BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ |
544 | BTRFS_FEATURE_INCOMPAT_NO_HOLES) | |
f2b636e8 | 545 | |
2eaa055f JM |
546 | #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ |
547 | (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) | |
548 | #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL | |
f2b636e8 | 549 | |
fec577fb | 550 | /* |
62e2749e | 551 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
552 | * the item in the leaf (relative to the start of the data area) |
553 | */ | |
0783fcfc | 554 | struct btrfs_item { |
e2fa7227 | 555 | struct btrfs_disk_key key; |
123abc88 | 556 | __le32 offset; |
5f39d397 | 557 | __le32 size; |
eb60ceac CM |
558 | } __attribute__ ((__packed__)); |
559 | ||
fec577fb CM |
560 | /* |
561 | * leaves have an item area and a data area: | |
562 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
563 | * | |
564 | * The data is separate from the items to get the keys closer together | |
565 | * during searches. | |
566 | */ | |
234b63a0 | 567 | struct btrfs_leaf { |
bb492bb0 | 568 | struct btrfs_header header; |
123abc88 | 569 | struct btrfs_item items[]; |
eb60ceac CM |
570 | } __attribute__ ((__packed__)); |
571 | ||
fec577fb CM |
572 | /* |
573 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
574 | * other blocks | |
575 | */ | |
123abc88 CM |
576 | struct btrfs_key_ptr { |
577 | struct btrfs_disk_key key; | |
578 | __le64 blockptr; | |
74493f7a | 579 | __le64 generation; |
123abc88 CM |
580 | } __attribute__ ((__packed__)); |
581 | ||
234b63a0 | 582 | struct btrfs_node { |
bb492bb0 | 583 | struct btrfs_header header; |
123abc88 | 584 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
585 | } __attribute__ ((__packed__)); |
586 | ||
fec577fb | 587 | /* |
234b63a0 CM |
588 | * btrfs_paths remember the path taken from the root down to the leaf. |
589 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
590 | * to any other levels that are present. |
591 | * | |
592 | * The slots array records the index of the item or block pointer | |
593 | * used while walking the tree. | |
594 | */ | |
234b63a0 | 595 | struct btrfs_path { |
5f39d397 | 596 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
234b63a0 | 597 | int slots[BTRFS_MAX_LEVEL]; |
925baedd CM |
598 | /* if there is real range locking, this locks field will change */ |
599 | int locks[BTRFS_MAX_LEVEL]; | |
3c69faec | 600 | int reada; |
925baedd | 601 | /* keep some upper locks as we walk down */ |
6702ed49 | 602 | int lowest_level; |
459931ec CM |
603 | |
604 | /* | |
605 | * set by btrfs_split_item, tells search_slot to keep all locks | |
606 | * and to force calls to keep space in the nodes | |
607 | */ | |
b9473439 CM |
608 | unsigned int search_for_split:1; |
609 | unsigned int keep_locks:1; | |
610 | unsigned int skip_locking:1; | |
611 | unsigned int leave_spinning:1; | |
5d4f98a2 | 612 | unsigned int search_commit_root:1; |
3f8a18cc | 613 | unsigned int need_commit_sem:1; |
eb60ceac | 614 | }; |
5de08d7d | 615 | |
62e2749e CM |
616 | /* |
617 | * items in the extent btree are used to record the objectid of the | |
618 | * owner of the block and the number of references | |
619 | */ | |
5d4f98a2 | 620 | |
62e2749e | 621 | struct btrfs_extent_item { |
5d4f98a2 YZ |
622 | __le64 refs; |
623 | __le64 generation; | |
624 | __le64 flags; | |
625 | } __attribute__ ((__packed__)); | |
626 | ||
627 | struct btrfs_extent_item_v0 { | |
62e2749e | 628 | __le32 refs; |
74493f7a CM |
629 | } __attribute__ ((__packed__)); |
630 | ||
5d4f98a2 YZ |
631 | #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \ |
632 | sizeof(struct btrfs_item)) | |
633 | ||
634 | #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0) | |
635 | #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1) | |
636 | ||
637 | /* following flags only apply to tree blocks */ | |
638 | ||
639 | /* use full backrefs for extent pointers in the block */ | |
640 | #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8) | |
641 | ||
a2de733c AJ |
642 | /* |
643 | * this flag is only used internally by scrub and may be changed at any time | |
644 | * it is only declared here to avoid collisions | |
645 | */ | |
646 | #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48) | |
647 | ||
5d4f98a2 YZ |
648 | struct btrfs_tree_block_info { |
649 | struct btrfs_disk_key key; | |
650 | u8 level; | |
651 | } __attribute__ ((__packed__)); | |
652 | ||
653 | struct btrfs_extent_data_ref { | |
654 | __le64 root; | |
655 | __le64 objectid; | |
656 | __le64 offset; | |
657 | __le32 count; | |
658 | } __attribute__ ((__packed__)); | |
659 | ||
660 | struct btrfs_shared_data_ref { | |
661 | __le32 count; | |
662 | } __attribute__ ((__packed__)); | |
663 | ||
664 | struct btrfs_extent_inline_ref { | |
665 | u8 type; | |
1bec1aed | 666 | __le64 offset; |
5d4f98a2 YZ |
667 | } __attribute__ ((__packed__)); |
668 | ||
669 | /* old style backrefs item */ | |
670 | struct btrfs_extent_ref_v0 { | |
74493f7a CM |
671 | __le64 root; |
672 | __le64 generation; | |
673 | __le64 objectid; | |
5d4f98a2 | 674 | __le32 count; |
62e2749e CM |
675 | } __attribute__ ((__packed__)); |
676 | ||
5d4f98a2 | 677 | |
0b86a832 CM |
678 | /* dev extents record free space on individual devices. The owner |
679 | * field points back to the chunk allocation mapping tree that allocated | |
e17cade2 | 680 | * the extent. The chunk tree uuid field is a way to double check the owner |
0b86a832 CM |
681 | */ |
682 | struct btrfs_dev_extent { | |
e17cade2 CM |
683 | __le64 chunk_tree; |
684 | __le64 chunk_objectid; | |
685 | __le64 chunk_offset; | |
0b86a832 | 686 | __le64 length; |
e17cade2 | 687 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
688 | } __attribute__ ((__packed__)); |
689 | ||
3954401f | 690 | struct btrfs_inode_ref { |
aec7477b | 691 | __le64 index; |
3954401f CM |
692 | __le16 name_len; |
693 | /* name goes here */ | |
694 | } __attribute__ ((__packed__)); | |
695 | ||
f186373f MF |
696 | struct btrfs_inode_extref { |
697 | __le64 parent_objectid; | |
698 | __le64 index; | |
699 | __le16 name_len; | |
700 | __u8 name[0]; | |
701 | /* name goes here */ | |
702 | } __attribute__ ((__packed__)); | |
703 | ||
0b86a832 | 704 | struct btrfs_timespec { |
f254e52c | 705 | __le64 sec; |
1e1d2701 CM |
706 | __le32 nsec; |
707 | } __attribute__ ((__packed__)); | |
708 | ||
95029d7d | 709 | enum btrfs_compression_type { |
261507a0 LZ |
710 | BTRFS_COMPRESS_NONE = 0, |
711 | BTRFS_COMPRESS_ZLIB = 1, | |
a6fa6fae LZ |
712 | BTRFS_COMPRESS_LZO = 2, |
713 | BTRFS_COMPRESS_TYPES = 2, | |
714 | BTRFS_COMPRESS_LAST = 3, | |
95029d7d | 715 | }; |
c8b97818 | 716 | |
1e1d2701 | 717 | struct btrfs_inode_item { |
e02119d5 | 718 | /* nfs style generation number */ |
1e1d2701 | 719 | __le64 generation; |
e02119d5 CM |
720 | /* transid that last touched this inode */ |
721 | __le64 transid; | |
1e1d2701 | 722 | __le64 size; |
a76a3cd4 | 723 | __le64 nbytes; |
31f3c99b | 724 | __le64 block_group; |
1e1d2701 CM |
725 | __le32 nlink; |
726 | __le32 uid; | |
727 | __le32 gid; | |
728 | __le32 mode; | |
0b86a832 | 729 | __le64 rdev; |
f2b636e8 | 730 | __le64 flags; |
c8b97818 | 731 | |
c3027eb5 CM |
732 | /* modification sequence number for NFS */ |
733 | __le64 sequence; | |
734 | ||
735 | /* | |
736 | * a little future expansion, for more than this we can | |
737 | * just grow the inode item and version it | |
738 | */ | |
739 | __le64 reserved[4]; | |
0b86a832 CM |
740 | struct btrfs_timespec atime; |
741 | struct btrfs_timespec ctime; | |
742 | struct btrfs_timespec mtime; | |
743 | struct btrfs_timespec otime; | |
1e1d2701 CM |
744 | } __attribute__ ((__packed__)); |
745 | ||
e02119d5 CM |
746 | struct btrfs_dir_log_item { |
747 | __le64 end; | |
748 | } __attribute__ ((__packed__)); | |
749 | ||
62e2749e | 750 | struct btrfs_dir_item { |
d6e4a428 | 751 | struct btrfs_disk_key location; |
e02119d5 | 752 | __le64 transid; |
5103e947 | 753 | __le16 data_len; |
a8a2ee0c | 754 | __le16 name_len; |
62e2749e CM |
755 | u8 type; |
756 | } __attribute__ ((__packed__)); | |
757 | ||
b83cc969 LZ |
758 | #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0) |
759 | ||
521e0546 DS |
760 | /* |
761 | * Internal in-memory flag that a subvolume has been marked for deletion but | |
762 | * still visible as a directory | |
763 | */ | |
764 | #define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48) | |
765 | ||
62e2749e | 766 | struct btrfs_root_item { |
d6e4a428 | 767 | struct btrfs_inode_item inode; |
84234f3a | 768 | __le64 generation; |
d6e4a428 | 769 | __le64 root_dirid; |
db94535d CM |
770 | __le64 bytenr; |
771 | __le64 byte_limit; | |
772 | __le64 bytes_used; | |
80ff3856 | 773 | __le64 last_snapshot; |
f2b636e8 | 774 | __le64 flags; |
62e2749e | 775 | __le32 refs; |
5eda7b5e CM |
776 | struct btrfs_disk_key drop_progress; |
777 | u8 drop_level; | |
db94535d | 778 | u8 level; |
8ea05e3a AB |
779 | |
780 | /* | |
781 | * The following fields appear after subvol_uuids+subvol_times | |
782 | * were introduced. | |
783 | */ | |
784 | ||
785 | /* | |
786 | * This generation number is used to test if the new fields are valid | |
787 | * and up to date while reading the root item. Everytime the root item | |
788 | * is written out, the "generation" field is copied into this field. If | |
789 | * anyone ever mounted the fs with an older kernel, we will have | |
790 | * mismatching generation values here and thus must invalidate the | |
791 | * new fields. See btrfs_update_root and btrfs_find_last_root for | |
792 | * details. | |
793 | * the offset of generation_v2 is also used as the start for the memset | |
794 | * when invalidating the fields. | |
795 | */ | |
796 | __le64 generation_v2; | |
797 | u8 uuid[BTRFS_UUID_SIZE]; | |
798 | u8 parent_uuid[BTRFS_UUID_SIZE]; | |
799 | u8 received_uuid[BTRFS_UUID_SIZE]; | |
800 | __le64 ctransid; /* updated when an inode changes */ | |
801 | __le64 otransid; /* trans when created */ | |
802 | __le64 stransid; /* trans when sent. non-zero for received subvol */ | |
803 | __le64 rtransid; /* trans when received. non-zero for received subvol */ | |
804 | struct btrfs_timespec ctime; | |
805 | struct btrfs_timespec otime; | |
806 | struct btrfs_timespec stime; | |
807 | struct btrfs_timespec rtime; | |
808 | __le64 reserved[8]; /* for future */ | |
9f5fae2f | 809 | } __attribute__ ((__packed__)); |
62e2749e | 810 | |
0660b5af CM |
811 | /* |
812 | * this is used for both forward and backward root refs | |
813 | */ | |
814 | struct btrfs_root_ref { | |
815 | __le64 dirid; | |
816 | __le64 sequence; | |
817 | __le16 name_len; | |
818 | } __attribute__ ((__packed__)); | |
819 | ||
0940ebf6 ID |
820 | struct btrfs_disk_balance_args { |
821 | /* | |
822 | * profiles to operate on, single is denoted by | |
823 | * BTRFS_AVAIL_ALLOC_BIT_SINGLE | |
824 | */ | |
825 | __le64 profiles; | |
826 | ||
827 | /* usage filter */ | |
828 | __le64 usage; | |
829 | ||
830 | /* devid filter */ | |
831 | __le64 devid; | |
832 | ||
833 | /* devid subset filter [pstart..pend) */ | |
834 | __le64 pstart; | |
835 | __le64 pend; | |
836 | ||
837 | /* btrfs virtual address space subset filter [vstart..vend) */ | |
838 | __le64 vstart; | |
839 | __le64 vend; | |
840 | ||
841 | /* | |
842 | * profile to convert to, single is denoted by | |
843 | * BTRFS_AVAIL_ALLOC_BIT_SINGLE | |
844 | */ | |
845 | __le64 target; | |
846 | ||
847 | /* BTRFS_BALANCE_ARGS_* */ | |
848 | __le64 flags; | |
849 | ||
7d824b6f DS |
850 | /* BTRFS_BALANCE_ARGS_LIMIT value */ |
851 | __le64 limit; | |
852 | ||
853 | __le64 unused[7]; | |
0940ebf6 ID |
854 | } __attribute__ ((__packed__)); |
855 | ||
856 | /* | |
857 | * store balance parameters to disk so that balance can be properly | |
858 | * resumed after crash or unmount | |
859 | */ | |
860 | struct btrfs_balance_item { | |
861 | /* BTRFS_BALANCE_* */ | |
862 | __le64 flags; | |
863 | ||
864 | struct btrfs_disk_balance_args data; | |
865 | struct btrfs_disk_balance_args meta; | |
866 | struct btrfs_disk_balance_args sys; | |
867 | ||
868 | __le64 unused[4]; | |
869 | } __attribute__ ((__packed__)); | |
870 | ||
d899e052 YZ |
871 | #define BTRFS_FILE_EXTENT_INLINE 0 |
872 | #define BTRFS_FILE_EXTENT_REG 1 | |
873 | #define BTRFS_FILE_EXTENT_PREALLOC 2 | |
236454df | 874 | |
9f5fae2f | 875 | struct btrfs_file_extent_item { |
c8b97818 CM |
876 | /* |
877 | * transaction id that created this extent | |
878 | */ | |
71951f35 | 879 | __le64 generation; |
c8b97818 CM |
880 | /* |
881 | * max number of bytes to hold this extent in ram | |
882 | * when we split a compressed extent we can't know how big | |
883 | * each of the resulting pieces will be. So, this is | |
884 | * an upper limit on the size of the extent in ram instead of | |
885 | * an exact limit. | |
886 | */ | |
887 | __le64 ram_bytes; | |
888 | ||
889 | /* | |
890 | * 32 bits for the various ways we might encode the data, | |
891 | * including compression and encryption. If any of these | |
892 | * are set to something a given disk format doesn't understand | |
893 | * it is treated like an incompat flag for reading and writing, | |
894 | * but not for stat. | |
895 | */ | |
896 | u8 compression; | |
897 | u8 encryption; | |
898 | __le16 other_encoding; /* spare for later use */ | |
899 | ||
900 | /* are we inline data or a real extent? */ | |
236454df | 901 | u8 type; |
c8b97818 | 902 | |
9f5fae2f CM |
903 | /* |
904 | * disk space consumed by the extent, checksum blocks are included | |
905 | * in these numbers | |
906 | */ | |
db94535d CM |
907 | __le64 disk_bytenr; |
908 | __le64 disk_num_bytes; | |
9f5fae2f | 909 | /* |
dee26a9f | 910 | * the logical offset in file blocks (no csums) |
9f5fae2f CM |
911 | * this extent record is for. This allows a file extent to point |
912 | * into the middle of an existing extent on disk, sharing it | |
913 | * between two snapshots (useful if some bytes in the middle of the | |
914 | * extent have changed | |
915 | */ | |
916 | __le64 offset; | |
917 | /* | |
c8b97818 CM |
918 | * the logical number of file blocks (no csums included). This |
919 | * always reflects the size uncompressed and without encoding. | |
9f5fae2f | 920 | */ |
db94535d | 921 | __le64 num_bytes; |
c8b97818 | 922 | |
9f5fae2f CM |
923 | } __attribute__ ((__packed__)); |
924 | ||
f254e52c | 925 | struct btrfs_csum_item { |
509659cd | 926 | u8 csum; |
f254e52c CM |
927 | } __attribute__ ((__packed__)); |
928 | ||
733f4fbb SB |
929 | struct btrfs_dev_stats_item { |
930 | /* | |
931 | * grow this item struct at the end for future enhancements and keep | |
932 | * the existing values unchanged | |
933 | */ | |
934 | __le64 values[BTRFS_DEV_STAT_VALUES_MAX]; | |
935 | } __attribute__ ((__packed__)); | |
936 | ||
e922e087 SB |
937 | #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0 |
938 | #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1 | |
939 | #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0 | |
940 | #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1 | |
941 | #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2 | |
942 | #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3 | |
943 | #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4 | |
944 | ||
945 | struct btrfs_dev_replace { | |
946 | u64 replace_state; /* see #define above */ | |
947 | u64 time_started; /* seconds since 1-Jan-1970 */ | |
948 | u64 time_stopped; /* seconds since 1-Jan-1970 */ | |
949 | atomic64_t num_write_errors; | |
950 | atomic64_t num_uncorrectable_read_errors; | |
951 | ||
952 | u64 cursor_left; | |
953 | u64 committed_cursor_left; | |
954 | u64 cursor_left_last_write_of_item; | |
955 | u64 cursor_right; | |
956 | ||
957 | u64 cont_reading_from_srcdev_mode; /* see #define above */ | |
958 | ||
959 | int is_valid; | |
960 | int item_needs_writeback; | |
961 | struct btrfs_device *srcdev; | |
962 | struct btrfs_device *tgtdev; | |
963 | ||
964 | pid_t lock_owner; | |
965 | atomic_t nesting_level; | |
966 | struct mutex lock_finishing_cancel_unmount; | |
967 | struct mutex lock_management_lock; | |
968 | struct mutex lock; | |
969 | ||
970 | struct btrfs_scrub_progress scrub_progress; | |
971 | }; | |
972 | ||
a2bff640 SB |
973 | struct btrfs_dev_replace_item { |
974 | /* | |
975 | * grow this item struct at the end for future enhancements and keep | |
976 | * the existing values unchanged | |
977 | */ | |
978 | __le64 src_devid; | |
979 | __le64 cursor_left; | |
980 | __le64 cursor_right; | |
981 | __le64 cont_reading_from_srcdev_mode; | |
982 | ||
983 | __le64 replace_state; | |
984 | __le64 time_started; | |
985 | __le64 time_stopped; | |
986 | __le64 num_write_errors; | |
987 | __le64 num_uncorrectable_read_errors; | |
988 | } __attribute__ ((__packed__)); | |
989 | ||
0b86a832 | 990 | /* different types of block groups (and chunks) */ |
52ba6929 ID |
991 | #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0) |
992 | #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1) | |
993 | #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2) | |
994 | #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3) | |
995 | #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4) | |
996 | #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5) | |
997 | #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6) | |
1c89cdd1 AP |
998 | #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7) |
999 | #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8) | |
36523e95 DS |
1000 | #define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \ |
1001 | BTRFS_SPACE_INFO_GLOBAL_RSV) | |
e6ec716f MX |
1002 | |
1003 | enum btrfs_raid_types { | |
1004 | BTRFS_RAID_RAID10, | |
1005 | BTRFS_RAID_RAID1, | |
1006 | BTRFS_RAID_DUP, | |
1007 | BTRFS_RAID_RAID0, | |
1008 | BTRFS_RAID_SINGLE, | |
e942f883 CM |
1009 | BTRFS_RAID_RAID5, |
1010 | BTRFS_RAID_RAID6, | |
e6ec716f MX |
1011 | BTRFS_NR_RAID_TYPES |
1012 | }; | |
52ba6929 ID |
1013 | |
1014 | #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \ | |
1015 | BTRFS_BLOCK_GROUP_SYSTEM | \ | |
1016 | BTRFS_BLOCK_GROUP_METADATA) | |
1017 | ||
1018 | #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \ | |
1019 | BTRFS_BLOCK_GROUP_RAID1 | \ | |
53b381b3 DW |
1020 | BTRFS_BLOCK_GROUP_RAID5 | \ |
1021 | BTRFS_BLOCK_GROUP_RAID6 | \ | |
52ba6929 ID |
1022 | BTRFS_BLOCK_GROUP_DUP | \ |
1023 | BTRFS_BLOCK_GROUP_RAID10) | |
a46d11a8 ID |
1024 | /* |
1025 | * We need a bit for restriper to be able to tell when chunks of type | |
1026 | * SINGLE are available. This "extended" profile format is used in | |
1027 | * fs_info->avail_*_alloc_bits (in-memory) and balance item fields | |
1028 | * (on-disk). The corresponding on-disk bit in chunk.type is reserved | |
1029 | * to avoid remappings between two formats in future. | |
1030 | */ | |
1031 | #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48) | |
1032 | ||
36523e95 DS |
1033 | /* |
1034 | * A fake block group type that is used to communicate global block reserve | |
1035 | * size to userspace via the SPACE_INFO ioctl. | |
1036 | */ | |
1037 | #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49) | |
1038 | ||
899c81ea ID |
1039 | #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \ |
1040 | BTRFS_AVAIL_ALLOC_BIT_SINGLE) | |
1041 | ||
1042 | static inline u64 chunk_to_extended(u64 flags) | |
1043 | { | |
1044 | if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0) | |
1045 | flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE; | |
1046 | ||
1047 | return flags; | |
1048 | } | |
1049 | static inline u64 extended_to_chunk(u64 flags) | |
1050 | { | |
1051 | return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE; | |
1052 | } | |
1053 | ||
9078a3e1 CM |
1054 | struct btrfs_block_group_item { |
1055 | __le64 used; | |
0b86a832 CM |
1056 | __le64 chunk_objectid; |
1057 | __le64 flags; | |
9078a3e1 CM |
1058 | } __attribute__ ((__packed__)); |
1059 | ||
630dc772 AJ |
1060 | /* |
1061 | * is subvolume quota turned on? | |
1062 | */ | |
1063 | #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0) | |
1064 | /* | |
2f232036 | 1065 | * RESCAN is set during the initialization phase |
630dc772 | 1066 | */ |
2f232036 | 1067 | #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1) |
630dc772 AJ |
1068 | /* |
1069 | * Some qgroup entries are known to be out of date, | |
1070 | * either because the configuration has changed in a way that | |
1071 | * makes a rescan necessary, or because the fs has been mounted | |
1072 | * with a non-qgroup-aware version. | |
1073 | * Turning qouta off and on again makes it inconsistent, too. | |
1074 | */ | |
1075 | #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2) | |
1076 | ||
1077 | #define BTRFS_QGROUP_STATUS_VERSION 1 | |
1078 | ||
1079 | struct btrfs_qgroup_status_item { | |
1080 | __le64 version; | |
1081 | /* | |
1082 | * the generation is updated during every commit. As older | |
1083 | * versions of btrfs are not aware of qgroups, it will be | |
1084 | * possible to detect inconsistencies by checking the | |
1085 | * generation on mount time | |
1086 | */ | |
1087 | __le64 generation; | |
1088 | ||
1089 | /* flag definitions see above */ | |
1090 | __le64 flags; | |
1091 | ||
1092 | /* | |
1093 | * only used during scanning to record the progress | |
1094 | * of the scan. It contains a logical address | |
1095 | */ | |
2f232036 | 1096 | __le64 rescan; |
630dc772 AJ |
1097 | } __attribute__ ((__packed__)); |
1098 | ||
1099 | struct btrfs_qgroup_info_item { | |
1100 | __le64 generation; | |
1101 | __le64 rfer; | |
1102 | __le64 rfer_cmpr; | |
1103 | __le64 excl; | |
1104 | __le64 excl_cmpr; | |
1105 | } __attribute__ ((__packed__)); | |
1106 | ||
1107 | /* flags definition for qgroup limits */ | |
1108 | #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0) | |
1109 | #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1) | |
1110 | #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2) | |
1111 | #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3) | |
1112 | #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4) | |
1113 | #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5) | |
1114 | ||
1115 | struct btrfs_qgroup_limit_item { | |
1116 | /* | |
1117 | * only updated when any of the other values change | |
1118 | */ | |
1119 | __le64 flags; | |
1120 | __le64 max_rfer; | |
1121 | __le64 max_excl; | |
1122 | __le64 rsv_rfer; | |
1123 | __le64 rsv_excl; | |
1124 | } __attribute__ ((__packed__)); | |
1125 | ||
6324fbf3 | 1126 | struct btrfs_space_info { |
26b47ff6 | 1127 | spinlock_t lock; |
6a63209f | 1128 | |
89a55897 JB |
1129 | u64 total_bytes; /* total bytes in the space, |
1130 | this doesn't take mirrors into account */ | |
b742bb82 | 1131 | u64 bytes_used; /* total bytes used, |
e9c54999 | 1132 | this doesn't take mirrors into account */ |
6a63209f JB |
1133 | u64 bytes_pinned; /* total bytes pinned, will be freed when the |
1134 | transaction finishes */ | |
1135 | u64 bytes_reserved; /* total bytes the allocator has reserved for | |
1136 | current allocations */ | |
6a63209f | 1137 | u64 bytes_may_use; /* number of bytes that may be used for |
9ed74f2d | 1138 | delalloc/allocations */ |
26b47ff6 MX |
1139 | u64 bytes_readonly; /* total bytes that are read only */ |
1140 | ||
1141 | unsigned int full:1; /* indicates that we cannot allocate any more | |
1142 | chunks for this space */ | |
1143 | unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ | |
1144 | ||
1145 | unsigned int flush:1; /* set if we are trying to make space */ | |
1146 | ||
1147 | unsigned int force_alloc; /* set if we need to force a chunk | |
1148 | alloc for this space */ | |
1149 | ||
b742bb82 | 1150 | u64 disk_used; /* total bytes used on disk */ |
89a55897 JB |
1151 | u64 disk_total; /* total bytes on disk, takes mirrors into |
1152 | account */ | |
6a63209f | 1153 | |
26b47ff6 MX |
1154 | u64 flags; |
1155 | ||
b150a4f1 JB |
1156 | /* |
1157 | * bytes_pinned is kept in line with what is actually pinned, as in | |
1158 | * we've called update_block_group and dropped the bytes_used counter | |
1159 | * and increased the bytes_pinned counter. However this means that | |
1160 | * bytes_pinned does not reflect the bytes that will be pinned once the | |
1161 | * delayed refs are flushed, so this counter is inc'ed everytime we call | |
1162 | * btrfs_free_extent so it is a realtime count of what will be freed | |
1163 | * once the transaction is committed. It will be zero'ed everytime the | |
1164 | * transaction commits. | |
1165 | */ | |
1166 | struct percpu_counter total_bytes_pinned; | |
1167 | ||
6324fbf3 | 1168 | struct list_head list; |
0f9dd46c | 1169 | |
26b47ff6 | 1170 | struct rw_semaphore groups_sem; |
0f9dd46c | 1171 | /* for block groups in our same type */ |
b742bb82 | 1172 | struct list_head block_groups[BTRFS_NR_RAID_TYPES]; |
fdb5effd | 1173 | wait_queue_head_t wait; |
6ab0a202 JM |
1174 | |
1175 | struct kobject kobj; | |
1176 | struct kobject block_group_kobjs[BTRFS_NR_RAID_TYPES]; | |
0f9dd46c JB |
1177 | }; |
1178 | ||
66d8f3dd MX |
1179 | #define BTRFS_BLOCK_RSV_GLOBAL 1 |
1180 | #define BTRFS_BLOCK_RSV_DELALLOC 2 | |
1181 | #define BTRFS_BLOCK_RSV_TRANS 3 | |
1182 | #define BTRFS_BLOCK_RSV_CHUNK 4 | |
1183 | #define BTRFS_BLOCK_RSV_DELOPS 5 | |
1184 | #define BTRFS_BLOCK_RSV_EMPTY 6 | |
1185 | #define BTRFS_BLOCK_RSV_TEMP 7 | |
1186 | ||
f0486c68 YZ |
1187 | struct btrfs_block_rsv { |
1188 | u64 size; | |
1189 | u64 reserved; | |
f0486c68 | 1190 | struct btrfs_space_info *space_info; |
f0486c68 | 1191 | spinlock_t lock; |
66d8f3dd MX |
1192 | unsigned short full; |
1193 | unsigned short type; | |
1194 | unsigned short failfast; | |
f0486c68 YZ |
1195 | }; |
1196 | ||
fa9c0d79 CM |
1197 | /* |
1198 | * free clusters are used to claim free space in relatively large chunks, | |
1199 | * allowing us to do less seeky writes. They are used for all metadata | |
1200 | * allocations and data allocations in ssd mode. | |
1201 | */ | |
1202 | struct btrfs_free_cluster { | |
1203 | spinlock_t lock; | |
1204 | spinlock_t refill_lock; | |
1205 | struct rb_root root; | |
1206 | ||
1207 | /* largest extent in this cluster */ | |
1208 | u64 max_size; | |
1209 | ||
1210 | /* first extent starting offset */ | |
1211 | u64 window_start; | |
1212 | ||
1213 | struct btrfs_block_group_cache *block_group; | |
1214 | /* | |
1215 | * when a cluster is allocated from a block group, we put the | |
1216 | * cluster onto a list in the block group so that it can | |
1217 | * be freed before the block group is freed. | |
1218 | */ | |
1219 | struct list_head block_group_list; | |
6324fbf3 CM |
1220 | }; |
1221 | ||
817d52f8 JB |
1222 | enum btrfs_caching_type { |
1223 | BTRFS_CACHE_NO = 0, | |
1224 | BTRFS_CACHE_STARTED = 1, | |
291c7d2f JB |
1225 | BTRFS_CACHE_FAST = 2, |
1226 | BTRFS_CACHE_FINISHED = 3, | |
36cce922 | 1227 | BTRFS_CACHE_ERROR = 4, |
817d52f8 JB |
1228 | }; |
1229 | ||
0af3d00b JB |
1230 | enum btrfs_disk_cache_state { |
1231 | BTRFS_DC_WRITTEN = 0, | |
1232 | BTRFS_DC_ERROR = 1, | |
1233 | BTRFS_DC_CLEAR = 2, | |
1234 | BTRFS_DC_SETUP = 3, | |
1235 | BTRFS_DC_NEED_WRITE = 4, | |
1236 | }; | |
1237 | ||
11833d66 YZ |
1238 | struct btrfs_caching_control { |
1239 | struct list_head list; | |
1240 | struct mutex mutex; | |
1241 | wait_queue_head_t wait; | |
bab39bf9 | 1242 | struct btrfs_work work; |
11833d66 YZ |
1243 | struct btrfs_block_group_cache *block_group; |
1244 | u64 progress; | |
1245 | atomic_t count; | |
1246 | }; | |
1247 | ||
9078a3e1 CM |
1248 | struct btrfs_block_group_cache { |
1249 | struct btrfs_key key; | |
1250 | struct btrfs_block_group_item item; | |
817d52f8 | 1251 | struct btrfs_fs_info *fs_info; |
0af3d00b | 1252 | struct inode *inode; |
c286ac48 | 1253 | spinlock_t lock; |
324ae4df | 1254 | u64 pinned; |
e8569813 | 1255 | u64 reserved; |
1b2da372 | 1256 | u64 bytes_super; |
0b86a832 | 1257 | u64 flags; |
96303081 | 1258 | u64 sectorsize; |
5b0e95bf | 1259 | u64 cache_generation; |
53b381b3 DW |
1260 | |
1261 | /* for raid56, this is a full stripe, without parity */ | |
1262 | unsigned long full_stripe_len; | |
1263 | ||
0410c94a MK |
1264 | unsigned int ro:1; |
1265 | unsigned int dirty:1; | |
1266 | unsigned int iref:1; | |
0af3d00b JB |
1267 | |
1268 | int disk_cache_state; | |
0f9dd46c | 1269 | |
817d52f8 | 1270 | /* cache tracking stuff */ |
817d52f8 | 1271 | int cached; |
11833d66 YZ |
1272 | struct btrfs_caching_control *caching_ctl; |
1273 | u64 last_byte_to_unpin; | |
817d52f8 | 1274 | |
0f9dd46c JB |
1275 | struct btrfs_space_info *space_info; |
1276 | ||
1277 | /* free space cache stuff */ | |
34d52cb6 | 1278 | struct btrfs_free_space_ctl *free_space_ctl; |
0f9dd46c JB |
1279 | |
1280 | /* block group cache stuff */ | |
1281 | struct rb_node cache_node; | |
1282 | ||
1283 | /* for block groups in the same raid type */ | |
1284 | struct list_head list; | |
d2fb3437 YZ |
1285 | |
1286 | /* usage count */ | |
1287 | atomic_t count; | |
fa9c0d79 CM |
1288 | |
1289 | /* List of struct btrfs_free_clusters for this block group. | |
1290 | * Today it will only have one thing on it, but that may change | |
1291 | */ | |
1292 | struct list_head cluster_list; | |
ea658bad JB |
1293 | |
1294 | /* For delayed block group creation */ | |
1295 | struct list_head new_bg_list; | |
9078a3e1 | 1296 | }; |
0b86a832 | 1297 | |
097b8a7c JS |
1298 | /* delayed seq elem */ |
1299 | struct seq_list { | |
1300 | struct list_head list; | |
1301 | u64 seq; | |
1302 | }; | |
1303 | ||
5d80366e JB |
1304 | enum btrfs_orphan_cleanup_state { |
1305 | ORPHAN_CLEANUP_STARTED = 1, | |
1306 | ORPHAN_CLEANUP_DONE = 2, | |
1307 | }; | |
1308 | ||
53b381b3 DW |
1309 | /* used by the raid56 code to lock stripes for read/modify/write */ |
1310 | struct btrfs_stripe_hash { | |
1311 | struct list_head hash_list; | |
1312 | wait_queue_head_t wait; | |
1313 | spinlock_t lock; | |
1314 | }; | |
1315 | ||
1316 | /* used by the raid56 code to lock stripes for read/modify/write */ | |
1317 | struct btrfs_stripe_hash_table { | |
4ae10b3a CM |
1318 | struct list_head stripe_cache; |
1319 | spinlock_t cache_lock; | |
1320 | int cache_size; | |
1321 | struct btrfs_stripe_hash table[]; | |
53b381b3 DW |
1322 | }; |
1323 | ||
1324 | #define BTRFS_STRIPE_HASH_TABLE_BITS 11 | |
1325 | ||
21c7e756 MX |
1326 | void btrfs_init_async_reclaim_work(struct work_struct *work); |
1327 | ||
097b8a7c | 1328 | /* fs_info */ |
5d4f98a2 | 1329 | struct reloc_control; |
0b86a832 | 1330 | struct btrfs_device; |
8a4b83cc | 1331 | struct btrfs_fs_devices; |
c9e9f97b | 1332 | struct btrfs_balance_control; |
16cdcec7 | 1333 | struct btrfs_delayed_root; |
9f5fae2f | 1334 | struct btrfs_fs_info { |
5f39d397 | 1335 | u8 fsid[BTRFS_FSID_SIZE]; |
e17cade2 | 1336 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
62e2749e CM |
1337 | struct btrfs_root *extent_root; |
1338 | struct btrfs_root *tree_root; | |
0b86a832 CM |
1339 | struct btrfs_root *chunk_root; |
1340 | struct btrfs_root *dev_root; | |
3de4586c | 1341 | struct btrfs_root *fs_root; |
d20f7043 | 1342 | struct btrfs_root *csum_root; |
416ac51d | 1343 | struct btrfs_root *quota_root; |
f7a81ea4 | 1344 | struct btrfs_root *uuid_root; |
e02119d5 CM |
1345 | |
1346 | /* the log root tree is a directory of all the other log roots */ | |
1347 | struct btrfs_root *log_root_tree; | |
4df27c4d YZ |
1348 | |
1349 | spinlock_t fs_roots_radix_lock; | |
0f7d52f4 | 1350 | struct radix_tree_root fs_roots_radix; |
1a5bc167 | 1351 | |
0f9dd46c JB |
1352 | /* block group cache stuff */ |
1353 | spinlock_t block_group_cache_lock; | |
a1897fdd | 1354 | u64 first_logical_byte; |
0f9dd46c JB |
1355 | struct rb_root block_group_cache_tree; |
1356 | ||
2bf64758 JB |
1357 | /* keep track of unallocated space */ |
1358 | spinlock_t free_chunk_lock; | |
1359 | u64 free_chunk_space; | |
1360 | ||
11833d66 YZ |
1361 | struct extent_io_tree freed_extents[2]; |
1362 | struct extent_io_tree *pinned_extents; | |
1a5bc167 | 1363 | |
0b86a832 CM |
1364 | /* logical->physical extent mapping */ |
1365 | struct btrfs_mapping_tree mapping_tree; | |
1366 | ||
16cdcec7 MX |
1367 | /* |
1368 | * block reservation for extent, checksum, root tree and | |
1369 | * delayed dir index item | |
1370 | */ | |
f0486c68 YZ |
1371 | struct btrfs_block_rsv global_block_rsv; |
1372 | /* block reservation for delay allocation */ | |
1373 | struct btrfs_block_rsv delalloc_block_rsv; | |
1374 | /* block reservation for metadata operations */ | |
1375 | struct btrfs_block_rsv trans_block_rsv; | |
1376 | /* block reservation for chunk tree */ | |
1377 | struct btrfs_block_rsv chunk_block_rsv; | |
6d668dda JB |
1378 | /* block reservation for delayed operations */ |
1379 | struct btrfs_block_rsv delayed_block_rsv; | |
f0486c68 YZ |
1380 | |
1381 | struct btrfs_block_rsv empty_block_rsv; | |
1382 | ||
293ffd5f | 1383 | u64 generation; |
15ee9bc7 | 1384 | u64 last_trans_committed; |
0a2b2a84 | 1385 | u64 avg_delayed_ref_runtime; |
12fcfd22 CM |
1386 | |
1387 | /* | |
1388 | * this is updated to the current trans every time a full commit | |
1389 | * is required instead of the faster short fsync log commits | |
1390 | */ | |
1391 | u64 last_trans_log_full_commit; | |
25cd999e | 1392 | unsigned long mount_opt; |
261507a0 | 1393 | unsigned long compress_type:4; |
8b87dc17 | 1394 | int commit_interval; |
8c6a3ee6 MX |
1395 | /* |
1396 | * It is a suggestive number, the read side is safe even it gets a | |
1397 | * wrong number because we will write out the data into a regular | |
1398 | * extent. The write side(mount/remount) is under ->s_umount lock, | |
1399 | * so it is also safe. | |
1400 | */ | |
6f568d35 | 1401 | u64 max_inline; |
c018daec MX |
1402 | /* |
1403 | * Protected by ->chunk_mutex and sb->s_umount. | |
1404 | * | |
1405 | * The reason that we use two lock to protect it is because only | |
1406 | * remount and mount operations can change it and these two operations | |
1407 | * are under sb->s_umount, but the read side (chunk allocation) can not | |
1408 | * acquire sb->s_umount or the deadlock would happen. So we use two | |
1409 | * locks to protect it. On the write side, we must acquire two locks, | |
1410 | * and on the read side, we just need acquire one of them. | |
1411 | */ | |
8f662a76 | 1412 | u64 alloc_start; |
79154b1b | 1413 | struct btrfs_transaction *running_transaction; |
e6dcd2dc | 1414 | wait_queue_head_t transaction_throttle; |
f9295749 | 1415 | wait_queue_head_t transaction_wait; |
bb9c12c9 | 1416 | wait_queue_head_t transaction_blocked_wait; |
771ed689 | 1417 | wait_queue_head_t async_submit_wait; |
e02119d5 | 1418 | |
ceda0864 MX |
1419 | /* |
1420 | * Used to protect the incompat_flags, compat_flags, compat_ro_flags | |
1421 | * when they are updated. | |
1422 | * | |
1423 | * Because we do not clear the flags for ever, so we needn't use | |
1424 | * the lock on the read side. | |
1425 | * | |
1426 | * We also needn't use the lock when we mount the fs, because | |
1427 | * there is no other task which will update the flag. | |
1428 | */ | |
1429 | spinlock_t super_lock; | |
6c41761f DS |
1430 | struct btrfs_super_block *super_copy; |
1431 | struct btrfs_super_block *super_for_commit; | |
0b86a832 | 1432 | struct block_device *__bdev; |
e20d96d6 | 1433 | struct super_block *sb; |
d98237b3 | 1434 | struct inode *btree_inode; |
04160088 | 1435 | struct backing_dev_info bdi; |
e02119d5 | 1436 | struct mutex tree_log_mutex; |
a74a4b97 CM |
1437 | struct mutex transaction_kthread_mutex; |
1438 | struct mutex cleaner_mutex; | |
925baedd | 1439 | struct mutex chunk_mutex; |
7d9eb12c | 1440 | struct mutex volume_mutex; |
53b381b3 DW |
1441 | |
1442 | /* this is used during read/modify/write to make sure | |
1443 | * no two ios are trying to mod the same stripe at the same | |
1444 | * time | |
1445 | */ | |
1446 | struct btrfs_stripe_hash_table *stripe_hash_table; | |
1447 | ||
5a3f23d5 CM |
1448 | /* |
1449 | * this protects the ordered operations list only while we are | |
1450 | * processing all of the entries on it. This way we make | |
1451 | * sure the commit code doesn't find the list temporarily empty | |
1452 | * because another function happens to be doing non-waiting preflush | |
1453 | * before jumping into the main commit. | |
1454 | */ | |
1455 | struct mutex ordered_operations_mutex; | |
9ffba8cd JB |
1456 | |
1457 | /* | |
1458 | * Same as ordered_operations_mutex except this is for ordered extents | |
1459 | * and not the operations. | |
1460 | */ | |
1461 | struct mutex ordered_extent_flush_mutex; | |
1462 | ||
9e351cc8 | 1463 | struct rw_semaphore commit_root_sem; |
5a3f23d5 | 1464 | |
c71bf099 | 1465 | struct rw_semaphore cleanup_work_sem; |
76dda93c | 1466 | |
c71bf099 | 1467 | struct rw_semaphore subvol_sem; |
76dda93c YZ |
1468 | struct srcu_struct subvol_srcu; |
1469 | ||
a4abeea4 | 1470 | spinlock_t trans_lock; |
7585717f CM |
1471 | /* |
1472 | * the reloc mutex goes with the trans lock, it is taken | |
1473 | * during commit to protect us from the relocation code | |
1474 | */ | |
1475 | struct mutex reloc_mutex; | |
1476 | ||
8fd17795 | 1477 | struct list_head trans_list; |
facda1e7 | 1478 | struct list_head dead_roots; |
11833d66 | 1479 | struct list_head caching_block_groups; |
e02119d5 | 1480 | |
24bbcf04 YZ |
1481 | spinlock_t delayed_iput_lock; |
1482 | struct list_head delayed_iputs; | |
1483 | ||
f29021b2 JS |
1484 | /* this protects tree_mod_seq_list */ |
1485 | spinlock_t tree_mod_seq_lock; | |
fc36ed7e | 1486 | atomic64_t tree_mod_seq; |
f29021b2 JS |
1487 | struct list_head tree_mod_seq_list; |
1488 | ||
1489 | /* this protects tree_mod_log */ | |
1490 | rwlock_t tree_mod_log_lock; | |
1491 | struct rb_root tree_mod_log; | |
1492 | ||
cb03c743 | 1493 | atomic_t nr_async_submits; |
8c8bee1d | 1494 | atomic_t async_submit_draining; |
0986fe9e | 1495 | atomic_t nr_async_bios; |
771ed689 | 1496 | atomic_t async_delalloc_pages; |
a4abeea4 | 1497 | atomic_t open_ioctl_trans; |
ce9adaa5 | 1498 | |
3eaa2885 | 1499 | /* |
199c2a9c | 1500 | * this is used to protect the following list -- ordered_roots. |
3eaa2885 | 1501 | */ |
199c2a9c | 1502 | spinlock_t ordered_root_lock; |
5a3f23d5 CM |
1503 | |
1504 | /* | |
199c2a9c MX |
1505 | * all fs/file tree roots in which there are data=ordered extents |
1506 | * pending writeback are added into this list. | |
1507 | * | |
5a3f23d5 CM |
1508 | * these can span multiple transactions and basically include |
1509 | * every dirty data page that isn't from nodatacow | |
1510 | */ | |
199c2a9c | 1511 | struct list_head ordered_roots; |
5a3f23d5 | 1512 | |
573bfb72 | 1513 | struct mutex delalloc_root_mutex; |
eb73c1b7 MX |
1514 | spinlock_t delalloc_root_lock; |
1515 | /* all fs/file tree roots that have delalloc inodes. */ | |
1516 | struct list_head delalloc_roots; | |
3eaa2885 | 1517 | |
8b712842 CM |
1518 | /* |
1519 | * there is a pool of worker threads for checksumming during writes | |
1520 | * and a pool for checksumming after reads. This is because readers | |
1521 | * can run with FS locks held, and the writers may be waiting for | |
1522 | * those locks. We don't want ordering in the pending list to cause | |
1523 | * deadlocks, and so the two are serviced separately. | |
1cc127b5 CM |
1524 | * |
1525 | * A third pool does submit_bio to avoid deadlocking with the other | |
1526 | * two | |
8b712842 | 1527 | */ |
d458b054 QW |
1528 | struct btrfs_workqueue *workers; |
1529 | struct btrfs_workqueue *delalloc_workers; | |
1530 | struct btrfs_workqueue *flush_workers; | |
1531 | struct btrfs_workqueue *endio_workers; | |
1532 | struct btrfs_workqueue *endio_meta_workers; | |
1533 | struct btrfs_workqueue *endio_raid56_workers; | |
1534 | struct btrfs_workqueue *rmw_workers; | |
1535 | struct btrfs_workqueue *endio_meta_write_workers; | |
1536 | struct btrfs_workqueue *endio_write_workers; | |
1537 | struct btrfs_workqueue *endio_freespace_worker; | |
1538 | struct btrfs_workqueue *submit_workers; | |
1539 | struct btrfs_workqueue *caching_workers; | |
1540 | struct btrfs_workqueue *readahead_workers; | |
bab39bf9 | 1541 | |
247e743c CM |
1542 | /* |
1543 | * fixup workers take dirty pages that didn't properly go through | |
1544 | * the cow mechanism and make them safe to write. It happens | |
1545 | * for the sys_munmap function call path | |
1546 | */ | |
d458b054 QW |
1547 | struct btrfs_workqueue *fixup_workers; |
1548 | struct btrfs_workqueue *delayed_workers; | |
a74a4b97 CM |
1549 | struct task_struct *transaction_kthread; |
1550 | struct task_struct *cleaner_kthread; | |
4543df7e | 1551 | int thread_pool_size; |
8b712842 | 1552 | |
58176a96 | 1553 | struct kobject super_kobj; |
6ab0a202 | 1554 | struct kobject *space_info_kobj; |
29e5be24 | 1555 | struct kobject *device_dir_kobj; |
58176a96 | 1556 | struct completion kobj_unregister; |
e66f709b | 1557 | int do_barriers; |
facda1e7 | 1558 | int closing; |
e02119d5 | 1559 | int log_root_recovering; |
9f5fae2f | 1560 | |
324ae4df | 1561 | u64 total_pinned; |
b9473439 | 1562 | |
e2d84521 MX |
1563 | /* used to keep from writing metadata until there is a nice batch */ |
1564 | struct percpu_counter dirty_metadata_bytes; | |
963d678b | 1565 | struct percpu_counter delalloc_bytes; |
e2d84521 | 1566 | s32 dirty_metadata_batch; |
963d678b MX |
1567 | s32 delalloc_batch; |
1568 | ||
0b86a832 CM |
1569 | struct list_head dirty_cowonly_roots; |
1570 | ||
8a4b83cc | 1571 | struct btrfs_fs_devices *fs_devices; |
4184ea7f CM |
1572 | |
1573 | /* | |
1574 | * the space_info list is almost entirely read only. It only changes | |
1575 | * when we add a new raid type to the FS, and that happens | |
1576 | * very rarely. RCU is used to protect it. | |
1577 | */ | |
6324fbf3 | 1578 | struct list_head space_info; |
4184ea7f | 1579 | |
b4d7c3c9 LZ |
1580 | struct btrfs_space_info *data_sinfo; |
1581 | ||
5d4f98a2 YZ |
1582 | struct reloc_control *reloc_ctl; |
1583 | ||
fa9c0d79 CM |
1584 | /* data_alloc_cluster is only used in ssd mode */ |
1585 | struct btrfs_free_cluster data_alloc_cluster; | |
1586 | ||
1587 | /* all metadata allocations go through this cluster */ | |
1588 | struct btrfs_free_cluster meta_alloc_cluster; | |
d18a2c44 | 1589 | |
4cb5300b CM |
1590 | /* auto defrag inodes go here */ |
1591 | spinlock_t defrag_inodes_lock; | |
1592 | struct rb_root defrag_inodes; | |
1593 | atomic_t defrag_running; | |
1594 | ||
de98ced9 MX |
1595 | /* Used to protect avail_{data, metadata, system}_alloc_bits */ |
1596 | seqlock_t profiles_lock; | |
a46d11a8 ID |
1597 | /* |
1598 | * these three are in extended format (availability of single | |
1599 | * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other | |
1600 | * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) | |
1601 | */ | |
d18a2c44 CM |
1602 | u64 avail_data_alloc_bits; |
1603 | u64 avail_metadata_alloc_bits; | |
1604 | u64 avail_system_alloc_bits; | |
788f20eb | 1605 | |
c9e9f97b ID |
1606 | /* restriper state */ |
1607 | spinlock_t balance_lock; | |
1608 | struct mutex balance_mutex; | |
837d5b6e ID |
1609 | atomic_t balance_running; |
1610 | atomic_t balance_pause_req; | |
a7e99c69 | 1611 | atomic_t balance_cancel_req; |
c9e9f97b | 1612 | struct btrfs_balance_control *balance_ctl; |
837d5b6e | 1613 | wait_queue_head_t balance_wait_q; |
c9e9f97b | 1614 | |
97e728d4 JB |
1615 | unsigned data_chunk_allocations; |
1616 | unsigned metadata_ratio; | |
1617 | ||
788f20eb | 1618 | void *bdev_holder; |
acce952b | 1619 | |
a2de733c AJ |
1620 | /* private scrub information */ |
1621 | struct mutex scrub_lock; | |
1622 | atomic_t scrubs_running; | |
1623 | atomic_t scrub_pause_req; | |
1624 | atomic_t scrubs_paused; | |
1625 | atomic_t scrub_cancel_req; | |
1626 | wait_queue_head_t scrub_pause_wait; | |
a2de733c | 1627 | int scrub_workers_refcnt; |
d458b054 QW |
1628 | struct btrfs_workqueue *scrub_workers; |
1629 | struct btrfs_workqueue *scrub_wr_completion_workers; | |
1630 | struct btrfs_workqueue *scrub_nocow_workers; | |
a2de733c | 1631 | |
21adbd5c SB |
1632 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
1633 | u32 check_integrity_print_mask; | |
1634 | #endif | |
416ac51d AJ |
1635 | /* |
1636 | * quota information | |
1637 | */ | |
1638 | unsigned int quota_enabled:1; | |
1639 | ||
1640 | /* | |
1641 | * quota_enabled only changes state after a commit. This holds the | |
1642 | * next state. | |
1643 | */ | |
1644 | unsigned int pending_quota_state:1; | |
1645 | ||
1646 | /* is qgroup tracking in a consistent state? */ | |
1647 | u64 qgroup_flags; | |
1648 | ||
1649 | /* holds configuration and tracking. Protected by qgroup_lock */ | |
1650 | struct rb_root qgroup_tree; | |
fcebe456 | 1651 | struct rb_root qgroup_op_tree; |
416ac51d | 1652 | spinlock_t qgroup_lock; |
fcebe456 JB |
1653 | spinlock_t qgroup_op_lock; |
1654 | atomic_t qgroup_op_seq; | |
416ac51d | 1655 | |
1e8f9158 WS |
1656 | /* |
1657 | * used to avoid frequently calling ulist_alloc()/ulist_free() | |
1658 | * when doing qgroup accounting, it must be protected by qgroup_lock. | |
1659 | */ | |
1660 | struct ulist *qgroup_ulist; | |
1661 | ||
f2f6ed3d WS |
1662 | /* protect user change for quota operations */ |
1663 | struct mutex qgroup_ioctl_lock; | |
1664 | ||
416ac51d AJ |
1665 | /* list of dirty qgroups to be written at next commit */ |
1666 | struct list_head dirty_qgroups; | |
1667 | ||
1668 | /* used by btrfs_qgroup_record_ref for an efficient tree traversal */ | |
1669 | u64 qgroup_seq; | |
21adbd5c | 1670 | |
2f232036 JS |
1671 | /* qgroup rescan items */ |
1672 | struct mutex qgroup_rescan_lock; /* protects the progress item */ | |
1673 | struct btrfs_key qgroup_rescan_progress; | |
d458b054 | 1674 | struct btrfs_workqueue *qgroup_rescan_workers; |
57254b6e | 1675 | struct completion qgroup_rescan_completion; |
b382a324 | 1676 | struct btrfs_work qgroup_rescan_work; |
2f232036 | 1677 | |
acce952b | 1678 | /* filesystem state */ |
87533c47 | 1679 | unsigned long fs_state; |
16cdcec7 MX |
1680 | |
1681 | struct btrfs_delayed_root *delayed_root; | |
af31f5e5 | 1682 | |
90519d66 AJ |
1683 | /* readahead tree */ |
1684 | spinlock_t reada_lock; | |
1685 | struct radix_tree_root reada_tree; | |
531f4b1a | 1686 | |
f28491e0 JB |
1687 | /* Extent buffer radix tree */ |
1688 | spinlock_t buffer_lock; | |
1689 | struct radix_tree_root buffer_radix; | |
1690 | ||
af31f5e5 CM |
1691 | /* next backup root to be overwritten */ |
1692 | int backup_root_index; | |
5af3e8cc SB |
1693 | |
1694 | int num_tolerated_disk_barrier_failures; | |
e922e087 SB |
1695 | |
1696 | /* device replace state */ | |
1697 | struct btrfs_dev_replace dev_replace; | |
5ac00add SB |
1698 | |
1699 | atomic_t mutually_exclusive_operation_running; | |
803b2f54 | 1700 | |
c404e0dc MX |
1701 | struct percpu_counter bio_counter; |
1702 | wait_queue_head_t replace_wait; | |
1703 | ||
803b2f54 | 1704 | struct semaphore uuid_tree_rescan_sem; |
70f80175 | 1705 | unsigned int update_uuid_tree_gen:1; |
21c7e756 MX |
1706 | |
1707 | /* Used to reclaim the metadata space in the background. */ | |
1708 | struct work_struct async_reclaim_work; | |
324ae4df | 1709 | }; |
0b86a832 | 1710 | |
8257b2dc MX |
1711 | struct btrfs_subvolume_writers { |
1712 | struct percpu_counter counter; | |
1713 | wait_queue_head_t wait; | |
1714 | }; | |
1715 | ||
27cdeb70 MX |
1716 | /* |
1717 | * The state of btrfs root | |
1718 | */ | |
1719 | /* | |
1720 | * btrfs_record_root_in_trans is a multi-step process, | |
1721 | * and it can race with the balancing code. But the | |
1722 | * race is very small, and only the first time the root | |
1723 | * is added to each transaction. So IN_TRANS_SETUP | |
1724 | * is used to tell us when more checks are required | |
1725 | */ | |
1726 | #define BTRFS_ROOT_IN_TRANS_SETUP 0 | |
1727 | #define BTRFS_ROOT_REF_COWS 1 | |
1728 | #define BTRFS_ROOT_TRACK_DIRTY 2 | |
1729 | #define BTRFS_ROOT_IN_RADIX 3 | |
1730 | #define BTRFS_ROOT_DUMMY_ROOT 4 | |
1731 | #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5 | |
1732 | #define BTRFS_ROOT_DEFRAG_RUNNING 6 | |
1733 | #define BTRFS_ROOT_FORCE_COW 7 | |
1734 | #define BTRFS_ROOT_MULTI_LOG_TASKS 8 | |
1735 | ||
9f5fae2f CM |
1736 | /* |
1737 | * in ram representation of the tree. extent_root is used for all allocations | |
f2458e1d | 1738 | * and for the extent tree extent_root root. |
9f5fae2f CM |
1739 | */ |
1740 | struct btrfs_root { | |
5f39d397 | 1741 | struct extent_buffer *node; |
925baedd | 1742 | |
5f39d397 | 1743 | struct extent_buffer *commit_root; |
e02119d5 | 1744 | struct btrfs_root *log_root; |
1a40e23b | 1745 | struct btrfs_root *reloc_root; |
31153d81 | 1746 | |
27cdeb70 | 1747 | unsigned long state; |
62e2749e CM |
1748 | struct btrfs_root_item root_item; |
1749 | struct btrfs_key root_key; | |
9f5fae2f | 1750 | struct btrfs_fs_info *fs_info; |
d0c803c4 CM |
1751 | struct extent_io_tree dirty_log_pages; |
1752 | ||
58176a96 JB |
1753 | struct kobject root_kobj; |
1754 | struct completion kobj_unregister; | |
a2135011 | 1755 | struct mutex objectid_mutex; |
7237f183 | 1756 | |
f0486c68 YZ |
1757 | spinlock_t accounting_lock; |
1758 | struct btrfs_block_rsv *block_rsv; | |
1759 | ||
581bb050 | 1760 | /* free ino cache stuff */ |
581bb050 LZ |
1761 | struct btrfs_free_space_ctl *free_ino_ctl; |
1762 | enum btrfs_caching_type cached; | |
1763 | spinlock_t cache_lock; | |
1764 | wait_queue_head_t cache_wait; | |
1765 | struct btrfs_free_space_ctl *free_ino_pinned; | |
1766 | u64 cache_progress; | |
82d5902d | 1767 | struct inode *cache_inode; |
581bb050 | 1768 | |
e02119d5 | 1769 | struct mutex log_mutex; |
7237f183 YZ |
1770 | wait_queue_head_t log_writer_wait; |
1771 | wait_queue_head_t log_commit_wait[2]; | |
8b050d35 | 1772 | struct list_head log_ctxs[2]; |
7237f183 YZ |
1773 | atomic_t log_writers; |
1774 | atomic_t log_commit[2]; | |
2ecb7923 | 1775 | atomic_t log_batch; |
bb14a59b | 1776 | int log_transid; |
d1433deb MX |
1777 | /* No matter the commit succeeds or not*/ |
1778 | int log_transid_committed; | |
1779 | /* Just be updated when the commit succeeds. */ | |
bb14a59b | 1780 | int last_log_commit; |
ff782e0a | 1781 | pid_t log_start_pid; |
ea8c2819 | 1782 | |
0f7d52f4 CM |
1783 | u64 objectid; |
1784 | u64 last_trans; | |
5f39d397 CM |
1785 | |
1786 | /* data allocations are done in sectorsize units */ | |
1787 | u32 sectorsize; | |
1788 | ||
1789 | /* node allocations are done in nodesize units */ | |
1790 | u32 nodesize; | |
1791 | ||
1792 | /* leaf allocations are done in leafsize units */ | |
1793 | u32 leafsize; | |
1794 | ||
87ee04eb CM |
1795 | u32 stripesize; |
1796 | ||
9f5fae2f | 1797 | u32 type; |
13a8a7c8 YZ |
1798 | |
1799 | u64 highest_objectid; | |
7585717f | 1800 | |
3f157a2f | 1801 | u64 defrag_trans_start; |
6702ed49 | 1802 | struct btrfs_key defrag_progress; |
0ef3e66b | 1803 | struct btrfs_key defrag_max; |
58176a96 | 1804 | char *name; |
0b86a832 CM |
1805 | |
1806 | /* the dirty list is only used by non-reference counted roots */ | |
1807 | struct list_head dirty_list; | |
7b128766 | 1808 | |
5d4f98a2 YZ |
1809 | struct list_head root_list; |
1810 | ||
2ab28f32 JB |
1811 | spinlock_t log_extents_lock[2]; |
1812 | struct list_head logged_list[2]; | |
1813 | ||
d68fc57b | 1814 | spinlock_t orphan_lock; |
8a35d95f | 1815 | atomic_t orphan_inodes; |
d68fc57b | 1816 | struct btrfs_block_rsv *orphan_block_rsv; |
d68fc57b | 1817 | int orphan_cleanup_state; |
3394e160 | 1818 | |
5d4f98a2 YZ |
1819 | spinlock_t inode_lock; |
1820 | /* red-black tree that keeps track of in-memory inodes */ | |
1821 | struct rb_root inode_tree; | |
1822 | ||
16cdcec7 MX |
1823 | /* |
1824 | * radix tree that keeps track of delayed nodes of every inode, | |
1825 | * protected by inode_lock | |
1826 | */ | |
1827 | struct radix_tree_root delayed_nodes_tree; | |
3394e160 CM |
1828 | /* |
1829 | * right now this just gets used so that a root has its own devid | |
1830 | * for stat. It may be used for more later | |
1831 | */ | |
0ee5dc67 | 1832 | dev_t anon_dev; |
f1ebcc74 | 1833 | |
5f3ab90a | 1834 | spinlock_t root_item_lock; |
b0feb9d9 | 1835 | atomic_t refs; |
eb73c1b7 | 1836 | |
573bfb72 | 1837 | struct mutex delalloc_mutex; |
eb73c1b7 MX |
1838 | spinlock_t delalloc_lock; |
1839 | /* | |
1840 | * all of the inodes that have delalloc bytes. It is possible for | |
1841 | * this list to be empty even when there is still dirty data=ordered | |
1842 | * extents waiting to finish IO. | |
1843 | */ | |
1844 | struct list_head delalloc_inodes; | |
1845 | struct list_head delalloc_root; | |
1846 | u64 nr_delalloc_inodes; | |
31f3d255 MX |
1847 | |
1848 | struct mutex ordered_extent_mutex; | |
199c2a9c MX |
1849 | /* |
1850 | * this is used by the balancing code to wait for all the pending | |
1851 | * ordered extents | |
1852 | */ | |
1853 | spinlock_t ordered_extent_lock; | |
1854 | ||
1855 | /* | |
1856 | * all of the data=ordered extents pending writeback | |
1857 | * these can span multiple transactions and basically include | |
1858 | * every dirty data page that isn't from nodatacow | |
1859 | */ | |
1860 | struct list_head ordered_extents; | |
1861 | struct list_head ordered_root; | |
1862 | u64 nr_ordered_extents; | |
2c686537 DS |
1863 | |
1864 | /* | |
1865 | * Number of currently running SEND ioctls to prevent | |
1866 | * manipulation with the read-only status via SUBVOL_SETFLAGS | |
1867 | */ | |
1868 | int send_in_progress; | |
8257b2dc MX |
1869 | struct btrfs_subvolume_writers *subv_writers; |
1870 | atomic_t will_be_snapshoted; | |
62e2749e CM |
1871 | }; |
1872 | ||
4cb5300b CM |
1873 | struct btrfs_ioctl_defrag_range_args { |
1874 | /* start of the defrag operation */ | |
1875 | __u64 start; | |
1876 | ||
1877 | /* number of bytes to defrag, use (u64)-1 to say all */ | |
1878 | __u64 len; | |
1879 | ||
1880 | /* | |
1881 | * flags for the operation, which can include turning | |
1882 | * on compression for this one defrag | |
1883 | */ | |
1884 | __u64 flags; | |
1885 | ||
1886 | /* | |
1887 | * any extent bigger than this will be considered | |
1888 | * already defragged. Use 0 to take the kernel default | |
1889 | * Use 1 to say every single extent must be rewritten | |
1890 | */ | |
1891 | __u32 extent_thresh; | |
1892 | ||
1893 | /* | |
1894 | * which compression method to use if turning on compression | |
1895 | * for this defrag operation. If unspecified, zlib will | |
1896 | * be used | |
1897 | */ | |
1898 | __u32 compress_type; | |
1899 | ||
1900 | /* spare for later */ | |
1901 | __u32 unused[4]; | |
1902 | }; | |
1903 | ||
1904 | ||
1e1d2701 CM |
1905 | /* |
1906 | * inode items have the data typically returned from stat and store other | |
1907 | * info about object characteristics. There is one for every file and dir in | |
1908 | * the FS | |
1909 | */ | |
9078a3e1 | 1910 | #define BTRFS_INODE_ITEM_KEY 1 |
0660b5af | 1911 | #define BTRFS_INODE_REF_KEY 12 |
f186373f | 1912 | #define BTRFS_INODE_EXTREF_KEY 13 |
0660b5af CM |
1913 | #define BTRFS_XATTR_ITEM_KEY 24 |
1914 | #define BTRFS_ORPHAN_ITEM_KEY 48 | |
9078a3e1 | 1915 | /* reserve 2-15 close to the inode for later flexibility */ |
1e1d2701 CM |
1916 | |
1917 | /* | |
1918 | * dir items are the name -> inode pointers in a directory. There is one | |
1919 | * for every name in a directory. | |
1920 | */ | |
0660b5af CM |
1921 | #define BTRFS_DIR_LOG_ITEM_KEY 60 |
1922 | #define BTRFS_DIR_LOG_INDEX_KEY 72 | |
1923 | #define BTRFS_DIR_ITEM_KEY 84 | |
1924 | #define BTRFS_DIR_INDEX_KEY 96 | |
1e1d2701 | 1925 | /* |
9078a3e1 | 1926 | * extent data is for file data |
1e1d2701 | 1927 | */ |
0660b5af | 1928 | #define BTRFS_EXTENT_DATA_KEY 108 |
d20f7043 | 1929 | |
f254e52c | 1930 | /* |
d20f7043 CM |
1931 | * extent csums are stored in a separate tree and hold csums for |
1932 | * an entire extent on disk. | |
f254e52c | 1933 | */ |
d20f7043 | 1934 | #define BTRFS_EXTENT_CSUM_KEY 128 |
f254e52c | 1935 | |
1e1d2701 | 1936 | /* |
d4a78947 | 1937 | * root items point to tree roots. They are typically in the root |
1e1d2701 CM |
1938 | * tree used by the super block to find all the other trees |
1939 | */ | |
0660b5af CM |
1940 | #define BTRFS_ROOT_ITEM_KEY 132 |
1941 | ||
1942 | /* | |
1943 | * root backrefs tie subvols and snapshots to the directory entries that | |
1944 | * reference them | |
1945 | */ | |
1946 | #define BTRFS_ROOT_BACKREF_KEY 144 | |
1947 | ||
1948 | /* | |
1949 | * root refs make a fast index for listing all of the snapshots and | |
1950 | * subvolumes referenced by a given root. They point directly to the | |
1951 | * directory item in the root that references the subvol | |
1952 | */ | |
1953 | #define BTRFS_ROOT_REF_KEY 156 | |
1954 | ||
1e1d2701 CM |
1955 | /* |
1956 | * extent items are in the extent map tree. These record which blocks | |
1957 | * are used, and how many references there are to each block | |
1958 | */ | |
0660b5af | 1959 | #define BTRFS_EXTENT_ITEM_KEY 168 |
5d4f98a2 | 1960 | |
3173a18f JB |
1961 | /* |
1962 | * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know | |
1963 | * the length, so we save the level in key->offset instead of the length. | |
1964 | */ | |
1965 | #define BTRFS_METADATA_ITEM_KEY 169 | |
1966 | ||
5d4f98a2 YZ |
1967 | #define BTRFS_TREE_BLOCK_REF_KEY 176 |
1968 | ||
1969 | #define BTRFS_EXTENT_DATA_REF_KEY 178 | |
1970 | ||
1971 | #define BTRFS_EXTENT_REF_V0_KEY 180 | |
1972 | ||
1973 | #define BTRFS_SHARED_BLOCK_REF_KEY 182 | |
1974 | ||
1975 | #define BTRFS_SHARED_DATA_REF_KEY 184 | |
9078a3e1 CM |
1976 | |
1977 | /* | |
1978 | * block groups give us hints into the extent allocation trees. Which | |
1979 | * blocks are free etc etc | |
1980 | */ | |
0660b5af | 1981 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 192 |
9f5fae2f | 1982 | |
0660b5af CM |
1983 | #define BTRFS_DEV_EXTENT_KEY 204 |
1984 | #define BTRFS_DEV_ITEM_KEY 216 | |
1985 | #define BTRFS_CHUNK_ITEM_KEY 228 | |
0b86a832 | 1986 | |
630dc772 AJ |
1987 | /* |
1988 | * Records the overall state of the qgroups. | |
1989 | * There's only one instance of this key present, | |
1990 | * (0, BTRFS_QGROUP_STATUS_KEY, 0) | |
1991 | */ | |
1992 | #define BTRFS_QGROUP_STATUS_KEY 240 | |
1993 | /* | |
1994 | * Records the currently used space of the qgroup. | |
1995 | * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid). | |
1996 | */ | |
1997 | #define BTRFS_QGROUP_INFO_KEY 242 | |
1998 | /* | |
1999 | * Contains the user configured limits for the qgroup. | |
2000 | * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid). | |
2001 | */ | |
2002 | #define BTRFS_QGROUP_LIMIT_KEY 244 | |
2003 | /* | |
2004 | * Records the child-parent relationship of qgroups. For | |
2005 | * each relation, 2 keys are present: | |
2006 | * (childid, BTRFS_QGROUP_RELATION_KEY, parentid) | |
2007 | * (parentid, BTRFS_QGROUP_RELATION_KEY, childid) | |
2008 | */ | |
2009 | #define BTRFS_QGROUP_RELATION_KEY 246 | |
2010 | ||
0940ebf6 ID |
2011 | #define BTRFS_BALANCE_ITEM_KEY 248 |
2012 | ||
733f4fbb SB |
2013 | /* |
2014 | * Persistantly stores the io stats in the device tree. | |
2015 | * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid). | |
2016 | */ | |
2017 | #define BTRFS_DEV_STATS_KEY 249 | |
2018 | ||
a2bff640 SB |
2019 | /* |
2020 | * Persistantly stores the device replace state in the device tree. | |
2021 | * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0). | |
2022 | */ | |
2023 | #define BTRFS_DEV_REPLACE_KEY 250 | |
2024 | ||
07b30a49 SB |
2025 | /* |
2026 | * Stores items that allow to quickly map UUIDs to something else. | |
2027 | * These items are part of the filesystem UUID tree. | |
2028 | * The key is built like this: | |
2029 | * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits). | |
2030 | */ | |
2031 | #if BTRFS_UUID_SIZE != 16 | |
2032 | #error "UUID items require BTRFS_UUID_SIZE == 16!" | |
2033 | #endif | |
2034 | #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */ | |
2035 | #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to | |
2036 | * received subvols */ | |
2037 | ||
1e1d2701 CM |
2038 | /* |
2039 | * string items are for debugging. They just store a short string of | |
2040 | * data in the FS | |
2041 | */ | |
9078a3e1 CM |
2042 | #define BTRFS_STRING_ITEM_KEY 253 |
2043 | ||
0942caa3 DS |
2044 | /* |
2045 | * Flags for mount options. | |
2046 | * | |
2047 | * Note: don't forget to add new options to btrfs_show_options() | |
2048 | */ | |
21ad10cf CM |
2049 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
2050 | #define BTRFS_MOUNT_NODATACOW (1 << 1) | |
2051 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) | |
e18e4809 | 2052 | #define BTRFS_MOUNT_SSD (1 << 3) |
dfe25020 | 2053 | #define BTRFS_MOUNT_DEGRADED (1 << 4) |
c8b97818 | 2054 | #define BTRFS_MOUNT_COMPRESS (1 << 5) |
3a5e1404 | 2055 | #define BTRFS_MOUNT_NOTREELOG (1 << 6) |
dccae999 | 2056 | #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) |
451d7585 | 2057 | #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) |
c289811c | 2058 | #define BTRFS_MOUNT_NOSSD (1 << 9) |
e244a0ae | 2059 | #define BTRFS_MOUNT_DISCARD (1 << 10) |
a555f810 | 2060 | #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) |
0af3d00b | 2061 | #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) |
88c2ba3b | 2062 | #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) |
4260f7c7 | 2063 | #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) |
91435650 | 2064 | #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) |
4cb5300b | 2065 | #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) |
4b9465cb | 2066 | #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) |
af31f5e5 | 2067 | #define BTRFS_MOUNT_RECOVERY (1 << 18) |
9555c6c1 | 2068 | #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) |
c126dea7 CM |
2069 | #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) |
2070 | #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) | |
8c342930 | 2071 | #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) |
f420ee1e | 2072 | #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) |
3818aea2 | 2073 | #define BTRFS_MOUNT_CHANGE_INODE_CACHE (1 << 24) |
b6cda9bc | 2074 | |
8b87dc17 DS |
2075 | #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) |
2076 | ||
b6cda9bc CM |
2077 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) |
2078 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) | |
dc81cdc5 | 2079 | #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) |
b6cda9bc CM |
2080 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ |
2081 | BTRFS_MOUNT_##opt) | |
9d89ce65 WS |
2082 | #define btrfs_set_and_info(root, opt, fmt, args...) \ |
2083 | { \ | |
2084 | if (!btrfs_test_opt(root, opt)) \ | |
2085 | btrfs_info(root->fs_info, fmt, ##args); \ | |
2086 | btrfs_set_opt(root->fs_info->mount_opt, opt); \ | |
2087 | } | |
2088 | ||
2089 | #define btrfs_clear_and_info(root, opt, fmt, args...) \ | |
2090 | { \ | |
2091 | if (btrfs_test_opt(root, opt)) \ | |
2092 | btrfs_info(root->fs_info, fmt, ##args); \ | |
2093 | btrfs_clear_opt(root->fs_info->mount_opt, opt); \ | |
2094 | } | |
2095 | ||
b98b6767 Y |
2096 | /* |
2097 | * Inode flags | |
2098 | */ | |
fdebe2bd Y |
2099 | #define BTRFS_INODE_NODATASUM (1 << 0) |
2100 | #define BTRFS_INODE_NODATACOW (1 << 1) | |
2101 | #define BTRFS_INODE_READONLY (1 << 2) | |
c8b97818 | 2102 | #define BTRFS_INODE_NOCOMPRESS (1 << 3) |
d899e052 | 2103 | #define BTRFS_INODE_PREALLOC (1 << 4) |
6cbff00f CH |
2104 | #define BTRFS_INODE_SYNC (1 << 5) |
2105 | #define BTRFS_INODE_IMMUTABLE (1 << 6) | |
2106 | #define BTRFS_INODE_APPEND (1 << 7) | |
2107 | #define BTRFS_INODE_NODUMP (1 << 8) | |
2108 | #define BTRFS_INODE_NOATIME (1 << 9) | |
2109 | #define BTRFS_INODE_DIRSYNC (1 << 10) | |
75e7cb7f | 2110 | #define BTRFS_INODE_COMPRESS (1 << 11) |
6cbff00f | 2111 | |
08fe4db1 LZ |
2112 | #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) |
2113 | ||
cfed81a0 CM |
2114 | struct btrfs_map_token { |
2115 | struct extent_buffer *eb; | |
2116 | char *kaddr; | |
2117 | unsigned long offset; | |
2118 | }; | |
2119 | ||
2120 | static inline void btrfs_init_map_token (struct btrfs_map_token *token) | |
2121 | { | |
ad914559 | 2122 | token->kaddr = NULL; |
cfed81a0 CM |
2123 | } |
2124 | ||
5f39d397 CM |
2125 | /* some macros to generate set/get funcs for the struct fields. This |
2126 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | |
2127 | * one for u8: | |
2128 | */ | |
2129 | #define le8_to_cpu(v) (v) | |
2130 | #define cpu_to_le8(v) (v) | |
2131 | #define __le8 u8 | |
2132 | ||
2133 | #define read_eb_member(eb, ptr, type, member, result) ( \ | |
2134 | read_extent_buffer(eb, (char *)(result), \ | |
2135 | ((unsigned long)(ptr)) + \ | |
2136 | offsetof(type, member), \ | |
2137 | sizeof(((type *)0)->member))) | |
2138 | ||
2139 | #define write_eb_member(eb, ptr, type, member, result) ( \ | |
2140 | write_extent_buffer(eb, (char *)(result), \ | |
2141 | ((unsigned long)(ptr)) + \ | |
2142 | offsetof(type, member), \ | |
2143 | sizeof(((type *)0)->member))) | |
2144 | ||
18077bb4 LZ |
2145 | #define DECLARE_BTRFS_SETGET_BITS(bits) \ |
2146 | u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \ | |
2147 | unsigned long off, \ | |
2148 | struct btrfs_map_token *token); \ | |
2149 | void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \ | |
2150 | unsigned long off, u##bits val, \ | |
2151 | struct btrfs_map_token *token); \ | |
2152 | static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \ | |
2153 | unsigned long off) \ | |
2154 | { \ | |
2155 | return btrfs_get_token_##bits(eb, ptr, off, NULL); \ | |
2156 | } \ | |
2157 | static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \ | |
2158 | unsigned long off, u##bits val) \ | |
2159 | { \ | |
2160 | btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ | |
2161 | } | |
2162 | ||
2163 | DECLARE_BTRFS_SETGET_BITS(8) | |
2164 | DECLARE_BTRFS_SETGET_BITS(16) | |
2165 | DECLARE_BTRFS_SETGET_BITS(32) | |
2166 | DECLARE_BTRFS_SETGET_BITS(64) | |
2167 | ||
5f39d397 | 2168 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
18077bb4 LZ |
2169 | static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \ |
2170 | { \ | |
2171 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ | |
2172 | return btrfs_get_##bits(eb, s, offsetof(type, member)); \ | |
2173 | } \ | |
2174 | static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ | |
2175 | u##bits val) \ | |
2176 | { \ | |
2177 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ | |
2178 | btrfs_set_##bits(eb, s, offsetof(type, member), val); \ | |
2179 | } \ | |
2180 | static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \ | |
2181 | struct btrfs_map_token *token) \ | |
2182 | { \ | |
2183 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ | |
2184 | return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ | |
2185 | } \ | |
2186 | static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ | |
2187 | type *s, u##bits val, \ | |
2188 | struct btrfs_map_token *token) \ | |
2189 | { \ | |
2190 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ | |
2191 | btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ | |
2192 | } | |
5f39d397 CM |
2193 | |
2194 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | |
2195 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | |
2196 | { \ | |
727011e0 | 2197 | type *p = page_address(eb->pages[0]); \ |
df68b8a7 | 2198 | u##bits res = le##bits##_to_cpu(p->member); \ |
810191ff | 2199 | return res; \ |
5f39d397 CM |
2200 | } \ |
2201 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
2202 | u##bits val) \ | |
2203 | { \ | |
727011e0 | 2204 | type *p = page_address(eb->pages[0]); \ |
df68b8a7 | 2205 | p->member = cpu_to_le##bits(val); \ |
5f39d397 | 2206 | } |
9078a3e1 | 2207 | |
5f39d397 CM |
2208 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
2209 | static inline u##bits btrfs_##name(type *s) \ | |
2210 | { \ | |
2211 | return le##bits##_to_cpu(s->member); \ | |
2212 | } \ | |
2213 | static inline void btrfs_set_##name(type *s, u##bits val) \ | |
2214 | { \ | |
2215 | s->member = cpu_to_le##bits(val); \ | |
1e1d2701 CM |
2216 | } |
2217 | ||
0b86a832 CM |
2218 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
2219 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); | |
2220 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); | |
2221 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); | |
2222 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); | |
c3027eb5 CM |
2223 | BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, |
2224 | start_offset, 64); | |
0b86a832 CM |
2225 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); |
2226 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
2227 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); |
2228 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); | |
2229 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); | |
2b82032c | 2230 | BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); |
0b86a832 | 2231 | |
8a4b83cc CM |
2232 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
2233 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, | |
2234 | total_bytes, 64); | |
2235 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, | |
2236 | bytes_used, 64); | |
2237 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, | |
2238 | io_align, 32); | |
2239 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, | |
2240 | io_width, 32); | |
2241 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, | |
2242 | sector_size, 32); | |
2243 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
2244 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, |
2245 | dev_group, 32); | |
2246 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, | |
2247 | seek_speed, 8); | |
2248 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, | |
2249 | bandwidth, 8); | |
2b82032c YZ |
2250 | BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, |
2251 | generation, 64); | |
8a4b83cc | 2252 | |
410ba3a2 | 2253 | static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) |
0b86a832 | 2254 | { |
410ba3a2 | 2255 | return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); |
0b86a832 CM |
2256 | } |
2257 | ||
1473b24e | 2258 | static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) |
2b82032c | 2259 | { |
1473b24e | 2260 | return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); |
2b82032c YZ |
2261 | } |
2262 | ||
e17cade2 | 2263 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
0b86a832 CM |
2264 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
2265 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); | |
2266 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); | |
2267 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); | |
2268 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); | |
2269 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); | |
2270 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); | |
321aecc6 | 2271 | BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); |
0b86a832 CM |
2272 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
2273 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); | |
2274 | ||
e17cade2 CM |
2275 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
2276 | { | |
2277 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); | |
2278 | } | |
2279 | ||
2280 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); | |
0b86a832 CM |
2281 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
2282 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, | |
2283 | stripe_len, 64); | |
2284 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, | |
2285 | io_align, 32); | |
2286 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, | |
2287 | io_width, 32); | |
2288 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, | |
2289 | sector_size, 32); | |
2290 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); | |
2291 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, | |
2292 | num_stripes, 16); | |
321aecc6 CM |
2293 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, |
2294 | sub_stripes, 16); | |
0b86a832 CM |
2295 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
2296 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); | |
2297 | ||
2298 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, | |
2299 | int nr) | |
2300 | { | |
2301 | unsigned long offset = (unsigned long)c; | |
2302 | offset += offsetof(struct btrfs_chunk, stripe); | |
2303 | offset += nr * sizeof(struct btrfs_stripe); | |
2304 | return (struct btrfs_stripe *)offset; | |
2305 | } | |
2306 | ||
a443755f CM |
2307 | static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) |
2308 | { | |
2309 | return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); | |
2310 | } | |
2311 | ||
0b86a832 CM |
2312 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
2313 | struct btrfs_chunk *c, int nr) | |
2314 | { | |
2315 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); | |
2316 | } | |
2317 | ||
0b86a832 CM |
2318 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, |
2319 | struct btrfs_chunk *c, int nr) | |
2320 | { | |
2321 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); | |
2322 | } | |
2323 | ||
5f39d397 CM |
2324 | /* struct btrfs_block_group_item */ |
2325 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | |
2326 | used, 64); | |
2327 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | |
2328 | used, 64); | |
0b86a832 CM |
2329 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
2330 | struct btrfs_block_group_item, chunk_objectid, 64); | |
e17cade2 CM |
2331 | |
2332 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, | |
0b86a832 CM |
2333 | struct btrfs_block_group_item, chunk_objectid, 64); |
2334 | BTRFS_SETGET_FUNCS(disk_block_group_flags, | |
2335 | struct btrfs_block_group_item, flags, 64); | |
2336 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, | |
2337 | struct btrfs_block_group_item, flags, 64); | |
1e1d2701 | 2338 | |
3954401f CM |
2339 | /* struct btrfs_inode_ref */ |
2340 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); | |
aec7477b | 2341 | BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); |
3954401f | 2342 | |
f186373f MF |
2343 | /* struct btrfs_inode_extref */ |
2344 | BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, | |
2345 | parent_objectid, 64); | |
2346 | BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, | |
2347 | name_len, 16); | |
2348 | BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); | |
2349 | ||
5f39d397 CM |
2350 | /* struct btrfs_inode_item */ |
2351 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | |
c3027eb5 | 2352 | BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); |
e02119d5 | 2353 | BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); |
5f39d397 | 2354 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); |
a76a3cd4 | 2355 | BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); |
5f39d397 CM |
2356 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); |
2357 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | |
2358 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | |
2359 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | |
2360 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | |
0b86a832 | 2361 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
f2b636e8 | 2362 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); |
3cae210f QW |
2363 | BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, |
2364 | generation, 64); | |
2365 | BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, | |
2366 | sequence, 64); | |
2367 | BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, | |
2368 | transid, 64); | |
2369 | BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); | |
2370 | BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, | |
2371 | nbytes, 64); | |
2372 | BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, | |
2373 | block_group, 64); | |
2374 | BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); | |
2375 | BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); | |
2376 | BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); | |
2377 | BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); | |
2378 | BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); | |
2379 | BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); | |
1e1d2701 | 2380 | |
0b86a832 | 2381 | static inline struct btrfs_timespec * |
5f39d397 | 2382 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 2383 | { |
5f39d397 CM |
2384 | unsigned long ptr = (unsigned long)inode_item; |
2385 | ptr += offsetof(struct btrfs_inode_item, atime); | |
0b86a832 | 2386 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
2387 | } |
2388 | ||
0b86a832 | 2389 | static inline struct btrfs_timespec * |
5f39d397 | 2390 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 2391 | { |
5f39d397 CM |
2392 | unsigned long ptr = (unsigned long)inode_item; |
2393 | ptr += offsetof(struct btrfs_inode_item, mtime); | |
0b86a832 | 2394 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
2395 | } |
2396 | ||
0b86a832 | 2397 | static inline struct btrfs_timespec * |
5f39d397 | 2398 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 2399 | { |
5f39d397 CM |
2400 | unsigned long ptr = (unsigned long)inode_item; |
2401 | ptr += offsetof(struct btrfs_inode_item, ctime); | |
0b86a832 | 2402 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
2403 | } |
2404 | ||
0b86a832 CM |
2405 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
2406 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); | |
3cae210f QW |
2407 | BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); |
2408 | BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); | |
e20d96d6 | 2409 | |
0b86a832 | 2410 | /* struct btrfs_dev_extent */ |
e17cade2 CM |
2411 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
2412 | chunk_tree, 64); | |
2413 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, | |
2414 | chunk_objectid, 64); | |
2415 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, | |
2416 | chunk_offset, 64); | |
0b86a832 CM |
2417 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
2418 | ||
231e88f4 | 2419 | static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
e17cade2 CM |
2420 | { |
2421 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); | |
231e88f4 | 2422 | return (unsigned long)dev + ptr; |
e17cade2 CM |
2423 | } |
2424 | ||
5d4f98a2 YZ |
2425 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); |
2426 | BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, | |
2427 | generation, 64); | |
2428 | BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); | |
74493f7a | 2429 | |
5d4f98a2 YZ |
2430 | BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); |
2431 | ||
2432 | ||
2433 | BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); | |
2434 | ||
2435 | static inline void btrfs_tree_block_key(struct extent_buffer *eb, | |
2436 | struct btrfs_tree_block_info *item, | |
2437 | struct btrfs_disk_key *key) | |
2438 | { | |
2439 | read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
2440 | } | |
2441 | ||
2442 | static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, | |
2443 | struct btrfs_tree_block_info *item, | |
2444 | struct btrfs_disk_key *key) | |
2445 | { | |
2446 | write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
2447 | } | |
e20d96d6 | 2448 | |
5d4f98a2 YZ |
2449 | BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, |
2450 | root, 64); | |
2451 | BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, | |
2452 | objectid, 64); | |
2453 | BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, | |
2454 | offset, 64); | |
2455 | BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, | |
2456 | count, 32); | |
2457 | ||
2458 | BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, | |
2459 | count, 32); | |
2460 | ||
2461 | BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, | |
2462 | type, 8); | |
2463 | BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, | |
2464 | offset, 64); | |
2465 | ||
2466 | static inline u32 btrfs_extent_inline_ref_size(int type) | |
2467 | { | |
2468 | if (type == BTRFS_TREE_BLOCK_REF_KEY || | |
2469 | type == BTRFS_SHARED_BLOCK_REF_KEY) | |
2470 | return sizeof(struct btrfs_extent_inline_ref); | |
2471 | if (type == BTRFS_SHARED_DATA_REF_KEY) | |
2472 | return sizeof(struct btrfs_shared_data_ref) + | |
2473 | sizeof(struct btrfs_extent_inline_ref); | |
2474 | if (type == BTRFS_EXTENT_DATA_REF_KEY) | |
2475 | return sizeof(struct btrfs_extent_data_ref) + | |
2476 | offsetof(struct btrfs_extent_inline_ref, offset); | |
2477 | BUG(); | |
2478 | return 0; | |
2479 | } | |
2480 | ||
2481 | BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); | |
2482 | BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, | |
2483 | generation, 64); | |
2484 | BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); | |
2485 | BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); | |
e20d96d6 | 2486 | |
5f39d397 CM |
2487 | /* struct btrfs_node */ |
2488 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | |
74493f7a | 2489 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
3cae210f QW |
2490 | BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, |
2491 | blockptr, 64); | |
2492 | BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, | |
2493 | generation, 64); | |
e20d96d6 | 2494 | |
5f39d397 | 2495 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
cf27e1ee | 2496 | { |
5f39d397 CM |
2497 | unsigned long ptr; |
2498 | ptr = offsetof(struct btrfs_node, ptrs) + | |
2499 | sizeof(struct btrfs_key_ptr) * nr; | |
2500 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | |
cf27e1ee CM |
2501 | } |
2502 | ||
5f39d397 CM |
2503 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
2504 | int nr, u64 val) | |
cf27e1ee | 2505 | { |
5f39d397 CM |
2506 | unsigned long ptr; |
2507 | ptr = offsetof(struct btrfs_node, ptrs) + | |
2508 | sizeof(struct btrfs_key_ptr) * nr; | |
2509 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | |
cf27e1ee CM |
2510 | } |
2511 | ||
74493f7a CM |
2512 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
2513 | { | |
2514 | unsigned long ptr; | |
2515 | ptr = offsetof(struct btrfs_node, ptrs) + | |
2516 | sizeof(struct btrfs_key_ptr) * nr; | |
2517 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); | |
2518 | } | |
2519 | ||
2520 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, | |
2521 | int nr, u64 val) | |
2522 | { | |
2523 | unsigned long ptr; | |
2524 | ptr = offsetof(struct btrfs_node, ptrs) + | |
2525 | sizeof(struct btrfs_key_ptr) * nr; | |
2526 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); | |
2527 | } | |
2528 | ||
810191ff | 2529 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
4d775673 | 2530 | { |
5f39d397 CM |
2531 | return offsetof(struct btrfs_node, ptrs) + |
2532 | sizeof(struct btrfs_key_ptr) * nr; | |
4d775673 CM |
2533 | } |
2534 | ||
e644d021 CM |
2535 | void btrfs_node_key(struct extent_buffer *eb, |
2536 | struct btrfs_disk_key *disk_key, int nr); | |
2537 | ||
5f39d397 CM |
2538 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
2539 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f8a0c | 2540 | { |
5f39d397 CM |
2541 | unsigned long ptr; |
2542 | ptr = btrfs_node_key_ptr_offset(nr); | |
2543 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
2544 | struct btrfs_key_ptr, key, disk_key); | |
1d4f8a0c CM |
2545 | } |
2546 | ||
5f39d397 CM |
2547 | /* struct btrfs_item */ |
2548 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | |
2549 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | |
3cae210f QW |
2550 | BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); |
2551 | BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); | |
4d775673 | 2552 | |
5f39d397 | 2553 | static inline unsigned long btrfs_item_nr_offset(int nr) |
1d4f8a0c | 2554 | { |
5f39d397 CM |
2555 | return offsetof(struct btrfs_leaf, items) + |
2556 | sizeof(struct btrfs_item) * nr; | |
1d4f8a0c CM |
2557 | } |
2558 | ||
dd3cc16b | 2559 | static inline struct btrfs_item *btrfs_item_nr(int nr) |
0783fcfc | 2560 | { |
5f39d397 | 2561 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
0783fcfc CM |
2562 | } |
2563 | ||
5f39d397 CM |
2564 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
2565 | struct btrfs_item *item) | |
0783fcfc | 2566 | { |
5f39d397 | 2567 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
0783fcfc CM |
2568 | } |
2569 | ||
5f39d397 | 2570 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 2571 | { |
dd3cc16b | 2572 | return btrfs_item_end(eb, btrfs_item_nr(nr)); |
0783fcfc CM |
2573 | } |
2574 | ||
5f39d397 | 2575 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 2576 | { |
dd3cc16b | 2577 | return btrfs_item_offset(eb, btrfs_item_nr(nr)); |
0783fcfc CM |
2578 | } |
2579 | ||
5f39d397 | 2580 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 2581 | { |
dd3cc16b | 2582 | return btrfs_item_size(eb, btrfs_item_nr(nr)); |
0783fcfc CM |
2583 | } |
2584 | ||
5f39d397 CM |
2585 | static inline void btrfs_item_key(struct extent_buffer *eb, |
2586 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 2587 | { |
dd3cc16b | 2588 | struct btrfs_item *item = btrfs_item_nr(nr); |
5f39d397 | 2589 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); |
1d4f6404 CM |
2590 | } |
2591 | ||
5f39d397 CM |
2592 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
2593 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 2594 | { |
dd3cc16b | 2595 | struct btrfs_item *item = btrfs_item_nr(nr); |
5f39d397 | 2596 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); |
1d4f6404 CM |
2597 | } |
2598 | ||
e02119d5 CM |
2599 | BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); |
2600 | ||
0660b5af CM |
2601 | /* |
2602 | * struct btrfs_root_ref | |
2603 | */ | |
2604 | BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); | |
2605 | BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); | |
2606 | BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); | |
2607 | ||
5f39d397 | 2608 | /* struct btrfs_dir_item */ |
5103e947 | 2609 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
5f39d397 CM |
2610 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
2611 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | |
e02119d5 | 2612 | BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); |
3cae210f QW |
2613 | BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); |
2614 | BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, | |
2615 | data_len, 16); | |
2616 | BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, | |
2617 | name_len, 16); | |
2618 | BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, | |
2619 | transid, 64); | |
1d4f6404 | 2620 | |
5f39d397 CM |
2621 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
2622 | struct btrfs_dir_item *item, | |
2623 | struct btrfs_disk_key *key) | |
1d4f6404 | 2624 | { |
5f39d397 | 2625 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
1d4f6404 CM |
2626 | } |
2627 | ||
5f39d397 CM |
2628 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
2629 | struct btrfs_dir_item *item, | |
2630 | struct btrfs_disk_key *key) | |
a8a2ee0c | 2631 | { |
5f39d397 | 2632 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
a8a2ee0c CM |
2633 | } |
2634 | ||
0af3d00b JB |
2635 | BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, |
2636 | num_entries, 64); | |
2637 | BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, | |
2638 | num_bitmaps, 64); | |
2639 | BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, | |
2640 | generation, 64); | |
2641 | ||
2642 | static inline void btrfs_free_space_key(struct extent_buffer *eb, | |
2643 | struct btrfs_free_space_header *h, | |
2644 | struct btrfs_disk_key *key) | |
2645 | { | |
2646 | read_eb_member(eb, h, struct btrfs_free_space_header, location, key); | |
2647 | } | |
2648 | ||
2649 | static inline void btrfs_set_free_space_key(struct extent_buffer *eb, | |
2650 | struct btrfs_free_space_header *h, | |
2651 | struct btrfs_disk_key *key) | |
2652 | { | |
2653 | write_eb_member(eb, h, struct btrfs_free_space_header, location, key); | |
2654 | } | |
2655 | ||
5f39d397 CM |
2656 | /* struct btrfs_disk_key */ |
2657 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | |
2658 | objectid, 64); | |
2659 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | |
2660 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | |
1d4f6404 | 2661 | |
e2fa7227 CM |
2662 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
2663 | struct btrfs_disk_key *disk) | |
2664 | { | |
2665 | cpu->offset = le64_to_cpu(disk->offset); | |
5f39d397 | 2666 | cpu->type = disk->type; |
e2fa7227 CM |
2667 | cpu->objectid = le64_to_cpu(disk->objectid); |
2668 | } | |
2669 | ||
2670 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
2671 | struct btrfs_key *cpu) | |
2672 | { | |
2673 | disk->offset = cpu_to_le64(cpu->offset); | |
5f39d397 | 2674 | disk->type = cpu->type; |
e2fa7227 CM |
2675 | disk->objectid = cpu_to_le64(cpu->objectid); |
2676 | } | |
2677 | ||
5f39d397 CM |
2678 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
2679 | struct btrfs_key *key, int nr) | |
7f5c1516 | 2680 | { |
5f39d397 CM |
2681 | struct btrfs_disk_key disk_key; |
2682 | btrfs_node_key(eb, &disk_key, nr); | |
2683 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
2684 | } |
2685 | ||
5f39d397 CM |
2686 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
2687 | struct btrfs_key *key, int nr) | |
7f5c1516 | 2688 | { |
5f39d397 CM |
2689 | struct btrfs_disk_key disk_key; |
2690 | btrfs_item_key(eb, &disk_key, nr); | |
2691 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
2692 | } |
2693 | ||
5f39d397 CM |
2694 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
2695 | struct btrfs_dir_item *item, | |
2696 | struct btrfs_key *key) | |
4d775673 | 2697 | { |
5f39d397 CM |
2698 | struct btrfs_disk_key disk_key; |
2699 | btrfs_dir_item_key(eb, item, &disk_key); | |
2700 | btrfs_disk_key_to_cpu(key, &disk_key); | |
4d775673 CM |
2701 | } |
2702 | ||
58176a96 | 2703 | |
5f39d397 | 2704 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
3768f368 | 2705 | { |
5f39d397 | 2706 | return key->type; |
3768f368 CM |
2707 | } |
2708 | ||
5f39d397 | 2709 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
3768f368 | 2710 | { |
5f39d397 | 2711 | key->type = val; |
3768f368 CM |
2712 | } |
2713 | ||
5f39d397 | 2714 | /* struct btrfs_header */ |
db94535d | 2715 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
5f39d397 CM |
2716 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
2717 | generation, 64); | |
2718 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | |
2719 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | |
63b10fc4 | 2720 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
5f39d397 | 2721 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
3cae210f QW |
2722 | BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, |
2723 | generation, 64); | |
2724 | BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); | |
2725 | BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, | |
2726 | nritems, 32); | |
2727 | BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); | |
0f7d52f4 | 2728 | |
63b10fc4 CM |
2729 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) |
2730 | { | |
2731 | return (btrfs_header_flags(eb) & flag) == flag; | |
2732 | } | |
2733 | ||
2734 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) | |
2735 | { | |
2736 | u64 flags = btrfs_header_flags(eb); | |
2737 | btrfs_set_header_flags(eb, flags | flag); | |
2738 | return (flags & flag) == flag; | |
2739 | } | |
2740 | ||
2741 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) | |
2742 | { | |
2743 | u64 flags = btrfs_header_flags(eb); | |
2744 | btrfs_set_header_flags(eb, flags & ~flag); | |
2745 | return (flags & flag) == flag; | |
2746 | } | |
2747 | ||
5d4f98a2 YZ |
2748 | static inline int btrfs_header_backref_rev(struct extent_buffer *eb) |
2749 | { | |
2750 | u64 flags = btrfs_header_flags(eb); | |
2751 | return flags >> BTRFS_BACKREF_REV_SHIFT; | |
2752 | } | |
2753 | ||
2754 | static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, | |
2755 | int rev) | |
2756 | { | |
2757 | u64 flags = btrfs_header_flags(eb); | |
2758 | flags &= ~BTRFS_BACKREF_REV_MASK; | |
2759 | flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; | |
2760 | btrfs_set_header_flags(eb, flags); | |
2761 | } | |
2762 | ||
0a4e5586 | 2763 | static inline unsigned long btrfs_header_fsid(void) |
0f7d52f4 | 2764 | { |
fba6aa75 | 2765 | return offsetof(struct btrfs_header, fsid); |
0f7d52f4 CM |
2766 | } |
2767 | ||
b308bc2f | 2768 | static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) |
e17cade2 | 2769 | { |
b308bc2f | 2770 | return offsetof(struct btrfs_header, chunk_tree_uuid); |
e17cade2 CM |
2771 | } |
2772 | ||
5f39d397 | 2773 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
3768f368 | 2774 | { |
d397712b | 2775 | return btrfs_header_level(eb) == 0; |
3768f368 CM |
2776 | } |
2777 | ||
5f39d397 | 2778 | /* struct btrfs_root_item */ |
84234f3a YZ |
2779 | BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, |
2780 | generation, 64); | |
5f39d397 | 2781 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); |
db94535d CM |
2782 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
2783 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); | |
3768f368 | 2784 | |
84234f3a YZ |
2785 | BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, |
2786 | generation, 64); | |
db94535d CM |
2787 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
2788 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); | |
5f39d397 CM |
2789 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
2790 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | |
f2b636e8 | 2791 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); |
db94535d CM |
2792 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
2793 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); | |
80ff3856 YZ |
2794 | BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, |
2795 | last_snapshot, 64); | |
8ea05e3a AB |
2796 | BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, |
2797 | generation_v2, 64); | |
2798 | BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, | |
2799 | ctransid, 64); | |
2800 | BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, | |
2801 | otransid, 64); | |
2802 | BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, | |
2803 | stransid, 64); | |
2804 | BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, | |
2805 | rtransid, 64); | |
123abc88 | 2806 | |
b83cc969 LZ |
2807 | static inline bool btrfs_root_readonly(struct btrfs_root *root) |
2808 | { | |
6ed3cf2c | 2809 | return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; |
b83cc969 LZ |
2810 | } |
2811 | ||
521e0546 DS |
2812 | static inline bool btrfs_root_dead(struct btrfs_root *root) |
2813 | { | |
2814 | return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; | |
2815 | } | |
2816 | ||
af31f5e5 CM |
2817 | /* struct btrfs_root_backup */ |
2818 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, | |
2819 | tree_root, 64); | |
2820 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, | |
2821 | tree_root_gen, 64); | |
2822 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, | |
2823 | tree_root_level, 8); | |
2824 | ||
2825 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, | |
2826 | chunk_root, 64); | |
2827 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, | |
2828 | chunk_root_gen, 64); | |
2829 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, | |
2830 | chunk_root_level, 8); | |
2831 | ||
2832 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, | |
2833 | extent_root, 64); | |
2834 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, | |
2835 | extent_root_gen, 64); | |
2836 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, | |
2837 | extent_root_level, 8); | |
2838 | ||
2839 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, | |
2840 | fs_root, 64); | |
2841 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, | |
2842 | fs_root_gen, 64); | |
2843 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, | |
2844 | fs_root_level, 8); | |
2845 | ||
2846 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, | |
2847 | dev_root, 64); | |
2848 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, | |
2849 | dev_root_gen, 64); | |
2850 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, | |
2851 | dev_root_level, 8); | |
2852 | ||
2853 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, | |
2854 | csum_root, 64); | |
2855 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, | |
2856 | csum_root_gen, 64); | |
2857 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, | |
2858 | csum_root_level, 8); | |
2859 | BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, | |
2860 | total_bytes, 64); | |
2861 | BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, | |
2862 | bytes_used, 64); | |
2863 | BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, | |
2864 | num_devices, 64); | |
2865 | ||
0940ebf6 ID |
2866 | /* struct btrfs_balance_item */ |
2867 | BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); | |
607d432d | 2868 | |
0940ebf6 ID |
2869 | static inline void btrfs_balance_data(struct extent_buffer *eb, |
2870 | struct btrfs_balance_item *bi, | |
2871 | struct btrfs_disk_balance_args *ba) | |
2872 | { | |
2873 | read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); | |
2874 | } | |
2875 | ||
2876 | static inline void btrfs_set_balance_data(struct extent_buffer *eb, | |
2877 | struct btrfs_balance_item *bi, | |
2878 | struct btrfs_disk_balance_args *ba) | |
2879 | { | |
2880 | write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); | |
2881 | } | |
2882 | ||
2883 | static inline void btrfs_balance_meta(struct extent_buffer *eb, | |
2884 | struct btrfs_balance_item *bi, | |
2885 | struct btrfs_disk_balance_args *ba) | |
2886 | { | |
2887 | read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); | |
2888 | } | |
2889 | ||
2890 | static inline void btrfs_set_balance_meta(struct extent_buffer *eb, | |
2891 | struct btrfs_balance_item *bi, | |
2892 | struct btrfs_disk_balance_args *ba) | |
2893 | { | |
2894 | write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); | |
2895 | } | |
2896 | ||
2897 | static inline void btrfs_balance_sys(struct extent_buffer *eb, | |
2898 | struct btrfs_balance_item *bi, | |
2899 | struct btrfs_disk_balance_args *ba) | |
2900 | { | |
2901 | read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); | |
2902 | } | |
2903 | ||
2904 | static inline void btrfs_set_balance_sys(struct extent_buffer *eb, | |
2905 | struct btrfs_balance_item *bi, | |
2906 | struct btrfs_disk_balance_args *ba) | |
2907 | { | |
2908 | write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); | |
2909 | } | |
2910 | ||
2911 | static inline void | |
2912 | btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, | |
2913 | struct btrfs_disk_balance_args *disk) | |
2914 | { | |
2915 | memset(cpu, 0, sizeof(*cpu)); | |
2916 | ||
2917 | cpu->profiles = le64_to_cpu(disk->profiles); | |
2918 | cpu->usage = le64_to_cpu(disk->usage); | |
2919 | cpu->devid = le64_to_cpu(disk->devid); | |
2920 | cpu->pstart = le64_to_cpu(disk->pstart); | |
2921 | cpu->pend = le64_to_cpu(disk->pend); | |
2922 | cpu->vstart = le64_to_cpu(disk->vstart); | |
2923 | cpu->vend = le64_to_cpu(disk->vend); | |
2924 | cpu->target = le64_to_cpu(disk->target); | |
2925 | cpu->flags = le64_to_cpu(disk->flags); | |
7d824b6f | 2926 | cpu->limit = le64_to_cpu(disk->limit); |
0940ebf6 ID |
2927 | } |
2928 | ||
2929 | static inline void | |
2930 | btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, | |
2931 | struct btrfs_balance_args *cpu) | |
2932 | { | |
2933 | memset(disk, 0, sizeof(*disk)); | |
2934 | ||
2935 | disk->profiles = cpu_to_le64(cpu->profiles); | |
2936 | disk->usage = cpu_to_le64(cpu->usage); | |
2937 | disk->devid = cpu_to_le64(cpu->devid); | |
2938 | disk->pstart = cpu_to_le64(cpu->pstart); | |
2939 | disk->pend = cpu_to_le64(cpu->pend); | |
2940 | disk->vstart = cpu_to_le64(cpu->vstart); | |
2941 | disk->vend = cpu_to_le64(cpu->vend); | |
2942 | disk->target = cpu_to_le64(cpu->target); | |
2943 | disk->flags = cpu_to_le64(cpu->flags); | |
7d824b6f | 2944 | disk->limit = cpu_to_le64(cpu->limit); |
0940ebf6 ID |
2945 | } |
2946 | ||
2947 | /* struct btrfs_super_block */ | |
db94535d | 2948 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
a061fc8d | 2949 | BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); |
5f39d397 CM |
2950 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
2951 | generation, 64); | |
2952 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | |
0b86a832 CM |
2953 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
2954 | struct btrfs_super_block, sys_chunk_array_size, 32); | |
84234f3a YZ |
2955 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, |
2956 | struct btrfs_super_block, chunk_root_generation, 64); | |
db94535d CM |
2957 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
2958 | root_level, 8); | |
0b86a832 CM |
2959 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
2960 | chunk_root, 64); | |
2961 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, | |
e02119d5 CM |
2962 | chunk_root_level, 8); |
2963 | BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, | |
2964 | log_root, 64); | |
c3027eb5 CM |
2965 | BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, |
2966 | log_root_transid, 64); | |
e02119d5 CM |
2967 | BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, |
2968 | log_root_level, 8); | |
db94535d CM |
2969 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
2970 | total_bytes, 64); | |
2971 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, | |
2972 | bytes_used, 64); | |
5f39d397 CM |
2973 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
2974 | sectorsize, 32); | |
2975 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | |
2976 | nodesize, 32); | |
2977 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, | |
2978 | leafsize, 32); | |
87ee04eb CM |
2979 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
2980 | stripesize, 32); | |
5f39d397 CM |
2981 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
2982 | root_dir_objectid, 64); | |
8a4b83cc CM |
2983 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
2984 | num_devices, 64); | |
f2b636e8 JB |
2985 | BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, |
2986 | compat_flags, 64); | |
2987 | BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, | |
12534832 | 2988 | compat_ro_flags, 64); |
f2b636e8 JB |
2989 | BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, |
2990 | incompat_flags, 64); | |
607d432d JB |
2991 | BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, |
2992 | csum_type, 16); | |
0af3d00b JB |
2993 | BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, |
2994 | cache_generation, 64); | |
3cae210f | 2995 | BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); |
26432799 SB |
2996 | BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, |
2997 | uuid_tree_generation, 64); | |
607d432d JB |
2998 | |
2999 | static inline int btrfs_super_csum_size(struct btrfs_super_block *s) | |
3000 | { | |
1104a885 DS |
3001 | u16 t = btrfs_super_csum_type(s); |
3002 | /* | |
3003 | * csum type is validated at mount time | |
3004 | */ | |
607d432d JB |
3005 | return btrfs_csum_sizes[t]; |
3006 | } | |
2e635a27 | 3007 | |
5f39d397 | 3008 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
2e635a27 | 3009 | { |
5f39d397 | 3010 | return offsetof(struct btrfs_leaf, items); |
2e635a27 CM |
3011 | } |
3012 | ||
5f39d397 CM |
3013 | /* struct btrfs_file_extent_item */ |
3014 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | |
3cae210f QW |
3015 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, |
3016 | struct btrfs_file_extent_item, disk_bytenr, 64); | |
3017 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, | |
3018 | struct btrfs_file_extent_item, offset, 64); | |
3019 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, | |
3020 | struct btrfs_file_extent_item, generation, 64); | |
3021 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, | |
3022 | struct btrfs_file_extent_item, num_bytes, 64); | |
e20d6c5b JB |
3023 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, |
3024 | struct btrfs_file_extent_item, disk_num_bytes, 64); | |
3025 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, | |
3026 | struct btrfs_file_extent_item, compression, 8); | |
9f5fae2f | 3027 | |
d397712b CM |
3028 | static inline unsigned long |
3029 | btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) | |
236454df | 3030 | { |
5f39d397 | 3031 | unsigned long offset = (unsigned long)e; |
db94535d | 3032 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 3033 | return offset; |
236454df CM |
3034 | } |
3035 | ||
3036 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
3037 | { | |
db94535d | 3038 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
9f5fae2f CM |
3039 | } |
3040 | ||
db94535d CM |
3041 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
3042 | disk_bytenr, 64); | |
5f39d397 CM |
3043 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
3044 | generation, 64); | |
db94535d CM |
3045 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
3046 | disk_num_bytes, 64); | |
5f39d397 CM |
3047 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
3048 | offset, 64); | |
db94535d CM |
3049 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
3050 | num_bytes, 64); | |
c8b97818 CM |
3051 | BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, |
3052 | ram_bytes, 64); | |
3053 | BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, | |
3054 | compression, 8); | |
3055 | BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, | |
3056 | encryption, 8); | |
3057 | BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, | |
3058 | other_encoding, 16); | |
3059 | ||
c8b97818 CM |
3060 | /* |
3061 | * this returns the number of bytes used by the item on disk, minus the | |
3062 | * size of any extent headers. If a file is compressed on disk, this is | |
3063 | * the compressed size | |
3064 | */ | |
3065 | static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, | |
3066 | struct btrfs_item *e) | |
3067 | { | |
3068 | unsigned long offset; | |
3069 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); | |
3070 | return btrfs_item_size(eb, e) - offset; | |
3071 | } | |
9f5fae2f | 3072 | |
514ac8ad CM |
3073 | /* this returns the number of file bytes represented by the inline item. |
3074 | * If an item is compressed, this is the uncompressed size | |
3075 | */ | |
3076 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, | |
3077 | int slot, | |
3078 | struct btrfs_file_extent_item *fi) | |
3079 | { | |
3080 | struct btrfs_map_token token; | |
3081 | ||
3082 | btrfs_init_map_token(&token); | |
3083 | /* | |
3084 | * return the space used on disk if this item isn't | |
3085 | * compressed or encoded | |
3086 | */ | |
3087 | if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 && | |
3088 | btrfs_token_file_extent_encryption(eb, fi, &token) == 0 && | |
3089 | btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) { | |
3090 | return btrfs_file_extent_inline_item_len(eb, | |
3091 | btrfs_item_nr(slot)); | |
3092 | } | |
3093 | ||
3094 | /* otherwise use the ram bytes field */ | |
3095 | return btrfs_token_file_extent_ram_bytes(eb, fi, &token); | |
3096 | } | |
3097 | ||
3098 | ||
733f4fbb SB |
3099 | /* btrfs_dev_stats_item */ |
3100 | static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb, | |
3101 | struct btrfs_dev_stats_item *ptr, | |
3102 | int index) | |
3103 | { | |
3104 | u64 val; | |
3105 | ||
3106 | read_extent_buffer(eb, &val, | |
3107 | offsetof(struct btrfs_dev_stats_item, values) + | |
3108 | ((unsigned long)ptr) + (index * sizeof(u64)), | |
3109 | sizeof(val)); | |
3110 | return val; | |
3111 | } | |
3112 | ||
3113 | static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, | |
3114 | struct btrfs_dev_stats_item *ptr, | |
3115 | int index, u64 val) | |
3116 | { | |
3117 | write_extent_buffer(eb, &val, | |
3118 | offsetof(struct btrfs_dev_stats_item, values) + | |
3119 | ((unsigned long)ptr) + (index * sizeof(u64)), | |
3120 | sizeof(val)); | |
3121 | } | |
3122 | ||
630dc772 AJ |
3123 | /* btrfs_qgroup_status_item */ |
3124 | BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, | |
3125 | generation, 64); | |
3126 | BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, | |
3127 | version, 64); | |
3128 | BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, | |
3129 | flags, 64); | |
2f232036 JS |
3130 | BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, |
3131 | rescan, 64); | |
630dc772 AJ |
3132 | |
3133 | /* btrfs_qgroup_info_item */ | |
3134 | BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, | |
3135 | generation, 64); | |
3136 | BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); | |
3137 | BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, | |
3138 | rfer_cmpr, 64); | |
3139 | BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); | |
3140 | BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, | |
3141 | excl_cmpr, 64); | |
3142 | ||
3143 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, | |
3144 | struct btrfs_qgroup_info_item, generation, 64); | |
3145 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, | |
3146 | rfer, 64); | |
3147 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, | |
3148 | struct btrfs_qgroup_info_item, rfer_cmpr, 64); | |
3149 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, | |
3150 | excl, 64); | |
3151 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, | |
3152 | struct btrfs_qgroup_info_item, excl_cmpr, 64); | |
3153 | ||
3154 | /* btrfs_qgroup_limit_item */ | |
3155 | BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, | |
3156 | flags, 64); | |
3157 | BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, | |
3158 | max_rfer, 64); | |
3159 | BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, | |
3160 | max_excl, 64); | |
3161 | BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, | |
3162 | rsv_rfer, 64); | |
3163 | BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, | |
3164 | rsv_excl, 64); | |
3165 | ||
a2bff640 SB |
3166 | /* btrfs_dev_replace_item */ |
3167 | BTRFS_SETGET_FUNCS(dev_replace_src_devid, | |
3168 | struct btrfs_dev_replace_item, src_devid, 64); | |
3169 | BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, | |
3170 | struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, | |
3171 | 64); | |
3172 | BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, | |
3173 | replace_state, 64); | |
3174 | BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, | |
3175 | time_started, 64); | |
3176 | BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, | |
3177 | time_stopped, 64); | |
3178 | BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, | |
3179 | num_write_errors, 64); | |
3180 | BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, | |
3181 | struct btrfs_dev_replace_item, num_uncorrectable_read_errors, | |
3182 | 64); | |
3183 | BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, | |
3184 | cursor_left, 64); | |
3185 | BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, | |
3186 | cursor_right, 64); | |
3187 | ||
3188 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, | |
3189 | struct btrfs_dev_replace_item, src_devid, 64); | |
3190 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, | |
3191 | struct btrfs_dev_replace_item, | |
3192 | cont_reading_from_srcdev_mode, 64); | |
3193 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, | |
3194 | struct btrfs_dev_replace_item, replace_state, 64); | |
3195 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, | |
3196 | struct btrfs_dev_replace_item, time_started, 64); | |
3197 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, | |
3198 | struct btrfs_dev_replace_item, time_stopped, 64); | |
3199 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, | |
3200 | struct btrfs_dev_replace_item, num_write_errors, 64); | |
3201 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, | |
3202 | struct btrfs_dev_replace_item, | |
3203 | num_uncorrectable_read_errors, 64); | |
3204 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, | |
3205 | struct btrfs_dev_replace_item, cursor_left, 64); | |
3206 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, | |
3207 | struct btrfs_dev_replace_item, cursor_right, 64); | |
3208 | ||
815745cf | 3209 | static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) |
e20d96d6 CM |
3210 | { |
3211 | return sb->s_fs_info; | |
3212 | } | |
3213 | ||
d397712b CM |
3214 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) |
3215 | { | |
db94535d CM |
3216 | if (level == 0) |
3217 | return root->leafsize; | |
3218 | return root->nodesize; | |
3219 | } | |
3220 | ||
4beb1b8b CM |
3221 | /* helper function to cast into the data area of the leaf. */ |
3222 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 | 3223 | ((type *)(btrfs_leaf_data(leaf) + \ |
5f39d397 CM |
3224 | btrfs_item_offset_nr(leaf, slot))) |
3225 | ||
3226 | #define btrfs_item_ptr_offset(leaf, slot) \ | |
3227 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | |
3228 | btrfs_item_offset_nr(leaf, slot))) | |
4beb1b8b | 3229 | |
67377734 JB |
3230 | static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) |
3231 | { | |
3232 | return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && | |
3233 | (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); | |
3234 | } | |
3235 | ||
3b16a4e3 JB |
3236 | static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) |
3237 | { | |
3238 | return mapping_gfp_mask(mapping) & ~__GFP_FS; | |
3239 | } | |
3240 | ||
b18c6685 | 3241 | /* extent-tree.c */ |
16cdcec7 | 3242 | static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root, |
9e0baf60 | 3243 | unsigned num_items) |
16cdcec7 MX |
3244 | { |
3245 | return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) * | |
c4fbb430 | 3246 | 2 * num_items; |
07127184 JB |
3247 | } |
3248 | ||
3249 | /* | |
3250 | * Doing a truncate won't result in new nodes or leaves, just what we need for | |
3251 | * COW. | |
3252 | */ | |
3253 | static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root, | |
3254 | unsigned num_items) | |
3255 | { | |
3256 | return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) * | |
3257 | num_items; | |
16cdcec7 MX |
3258 | } |
3259 | ||
1be41b78 JB |
3260 | int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans, |
3261 | struct btrfs_root *root); | |
0a2b2a84 JB |
3262 | int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans, |
3263 | struct btrfs_root *root); | |
fa9c0d79 | 3264 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
56bec294 CM |
3265 | int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, |
3266 | struct btrfs_root *root, unsigned long count); | |
31840ae1 | 3267 | int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len); |
a22285a6 YZ |
3268 | int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, |
3269 | struct btrfs_root *root, u64 bytenr, | |
3173a18f | 3270 | u64 offset, int metadata, u64 *refs, u64 *flags); |
11833d66 YZ |
3271 | int btrfs_pin_extent(struct btrfs_root *root, |
3272 | u64 bytenr, u64 num, int reserved); | |
dcfac415 | 3273 | int btrfs_pin_extent_for_log_replay(struct btrfs_root *root, |
e688b725 | 3274 | u64 bytenr, u64 num_bytes); |
8c2a1a30 JB |
3275 | int btrfs_exclude_logged_extents(struct btrfs_root *root, |
3276 | struct extent_buffer *eb); | |
80ff3856 | 3277 | int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, |
5d4f98a2 YZ |
3278 | struct btrfs_root *root, |
3279 | u64 objectid, u64 offset, u64 bytenr); | |
d397712b CM |
3280 | struct btrfs_block_group_cache *btrfs_lookup_block_group( |
3281 | struct btrfs_fs_info *info, | |
3282 | u64 bytenr); | |
5d4f98a2 | 3283 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
6ab0a202 | 3284 | int get_block_group_index(struct btrfs_block_group_cache *cache); |
5f39d397 | 3285 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
5d4f98a2 YZ |
3286 | struct btrfs_root *root, u32 blocksize, |
3287 | u64 parent, u64 root_objectid, | |
3288 | struct btrfs_disk_key *key, int level, | |
5581a51a | 3289 | u64 hint, u64 empty_size); |
f0486c68 YZ |
3290 | void btrfs_free_tree_block(struct btrfs_trans_handle *trans, |
3291 | struct btrfs_root *root, | |
3292 | struct extent_buffer *buf, | |
5581a51a | 3293 | u64 parent, int last_ref); |
5d4f98a2 YZ |
3294 | int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, |
3295 | struct btrfs_root *root, | |
3296 | u64 root_objectid, u64 owner, | |
3297 | u64 offset, struct btrfs_key *ins); | |
3298 | int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, | |
3299 | struct btrfs_root *root, | |
3300 | u64 root_objectid, u64 owner, u64 offset, | |
3301 | struct btrfs_key *ins); | |
00361589 JB |
3302 | int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes, |
3303 | u64 min_alloc_size, u64 empty_size, u64 hint_byte, | |
3304 | struct btrfs_key *ins, int is_data); | |
e089f05c | 3305 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
fcebe456 | 3306 | struct extent_buffer *buf, int full_backref, int no_quota); |
5d4f98a2 | 3307 | int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
fcebe456 | 3308 | struct extent_buffer *buf, int full_backref, int no_quota); |
5d4f98a2 YZ |
3309 | int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, |
3310 | struct btrfs_root *root, | |
3311 | u64 bytenr, u64 num_bytes, u64 flags, | |
b1c79e09 | 3312 | int level, int is_data); |
31840ae1 ZY |
3313 | int btrfs_free_extent(struct btrfs_trans_handle *trans, |
3314 | struct btrfs_root *root, | |
66d7e7f0 | 3315 | u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, |
fcebe456 | 3316 | u64 owner, u64 offset, int no_quota); |
5d4f98a2 | 3317 | |
65b51a00 | 3318 | int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len); |
e688b725 CM |
3319 | int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root, |
3320 | u64 start, u64 len); | |
143bede5 JM |
3321 | void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, |
3322 | struct btrfs_root *root); | |
ccd467d6 | 3323 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
11833d66 | 3324 | struct btrfs_root *root); |
b18c6685 | 3325 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
31840ae1 ZY |
3326 | struct btrfs_root *root, |
3327 | u64 bytenr, u64 num_bytes, u64 parent, | |
fcebe456 | 3328 | u64 root_objectid, u64 owner, u64 offset, int no_quota); |
5d4f98a2 | 3329 | |
9078a3e1 CM |
3330 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
3331 | struct btrfs_root *root); | |
d2fb3437 | 3332 | int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr); |
9078a3e1 CM |
3333 | int btrfs_free_block_groups(struct btrfs_fs_info *info); |
3334 | int btrfs_read_block_groups(struct btrfs_root *root); | |
ba1bf481 | 3335 | int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr); |
0b86a832 CM |
3336 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
3337 | struct btrfs_root *root, u64 bytes_used, | |
e17cade2 | 3338 | u64 type, u64 chunk_objectid, u64 chunk_offset, |
0b86a832 | 3339 | u64 size); |
1a40e23b ZY |
3340 | int btrfs_remove_block_group(struct btrfs_trans_handle *trans, |
3341 | struct btrfs_root *root, u64 group_start); | |
ea658bad JB |
3342 | void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans, |
3343 | struct btrfs_root *root); | |
6d07bcec | 3344 | u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data); |
4184ea7f | 3345 | void btrfs_clear_space_info_full(struct btrfs_fs_info *info); |
08e007d2 MX |
3346 | |
3347 | enum btrfs_reserve_flush_enum { | |
3348 | /* If we are in the transaction, we can't flush anything.*/ | |
3349 | BTRFS_RESERVE_NO_FLUSH, | |
3350 | /* | |
3351 | * Flushing delalloc may cause deadlock somewhere, in this | |
3352 | * case, use FLUSH LIMIT | |
3353 | */ | |
3354 | BTRFS_RESERVE_FLUSH_LIMIT, | |
3355 | BTRFS_RESERVE_FLUSH_ALL, | |
3356 | }; | |
3357 | ||
0ca1f7ce YZ |
3358 | int btrfs_check_data_free_space(struct inode *inode, u64 bytes); |
3359 | void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes); | |
a22285a6 YZ |
3360 | void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, |
3361 | struct btrfs_root *root); | |
d68fc57b YZ |
3362 | int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, |
3363 | struct inode *inode); | |
3364 | void btrfs_orphan_release_metadata(struct inode *inode); | |
d5c12070 MX |
3365 | int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, |
3366 | struct btrfs_block_rsv *rsv, | |
3367 | int nitems, | |
ee3441b4 | 3368 | u64 *qgroup_reserved, bool use_global_rsv); |
d5c12070 MX |
3369 | void btrfs_subvolume_release_metadata(struct btrfs_root *root, |
3370 | struct btrfs_block_rsv *rsv, | |
3371 | u64 qgroup_reserved); | |
0ca1f7ce YZ |
3372 | int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes); |
3373 | void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes); | |
3374 | int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes); | |
3375 | void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes); | |
66d8f3dd MX |
3376 | void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); |
3377 | struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root, | |
3378 | unsigned short type); | |
f0486c68 YZ |
3379 | void btrfs_free_block_rsv(struct btrfs_root *root, |
3380 | struct btrfs_block_rsv *rsv); | |
4a92b1b8 | 3381 | int btrfs_block_rsv_add(struct btrfs_root *root, |
08e007d2 MX |
3382 | struct btrfs_block_rsv *block_rsv, u64 num_bytes, |
3383 | enum btrfs_reserve_flush_enum flush); | |
4a92b1b8 | 3384 | int btrfs_block_rsv_check(struct btrfs_root *root, |
36ba022a JB |
3385 | struct btrfs_block_rsv *block_rsv, int min_factor); |
3386 | int btrfs_block_rsv_refill(struct btrfs_root *root, | |
08e007d2 MX |
3387 | struct btrfs_block_rsv *block_rsv, u64 min_reserved, |
3388 | enum btrfs_reserve_flush_enum flush); | |
f0486c68 YZ |
3389 | int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, |
3390 | struct btrfs_block_rsv *dst_rsv, | |
3391 | u64 num_bytes); | |
d52be818 JB |
3392 | int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, |
3393 | struct btrfs_block_rsv *dest, u64 num_bytes, | |
3394 | int min_factor); | |
f0486c68 YZ |
3395 | void btrfs_block_rsv_release(struct btrfs_root *root, |
3396 | struct btrfs_block_rsv *block_rsv, | |
3397 | u64 num_bytes); | |
3398 | int btrfs_set_block_group_ro(struct btrfs_root *root, | |
3399 | struct btrfs_block_group_cache *cache); | |
143bede5 JM |
3400 | void btrfs_set_block_group_rw(struct btrfs_root *root, |
3401 | struct btrfs_block_group_cache *cache); | |
0af3d00b | 3402 | void btrfs_put_block_group_cache(struct btrfs_fs_info *info); |
6d07bcec | 3403 | u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); |
acce952b | 3404 | int btrfs_error_unpin_extent_range(struct btrfs_root *root, |
3405 | u64 start, u64 end); | |
3406 | int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr, | |
5378e607 | 3407 | u64 num_bytes, u64 *actual_bytes); |
c87f08ca CM |
3408 | int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, |
3409 | struct btrfs_root *root, u64 type); | |
f7039b1d | 3410 | int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range); |
acce952b | 3411 | |
c59021f8 | 3412 | int btrfs_init_space_info(struct btrfs_fs_info *fs_info); |
bed92eae AJ |
3413 | int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, |
3414 | struct btrfs_fs_info *fs_info); | |
31e50229 | 3415 | int __get_raid_index(u64 flags); |
8257b2dc MX |
3416 | int btrfs_start_nocow_write(struct btrfs_root *root); |
3417 | void btrfs_end_nocow_write(struct btrfs_root *root); | |
dee26a9f | 3418 | /* ctree.c */ |
5d4f98a2 YZ |
3419 | int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, |
3420 | int level, int *slot); | |
3421 | int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); | |
0b86a832 CM |
3422 | int btrfs_previous_item(struct btrfs_root *root, |
3423 | struct btrfs_path *path, u64 min_objectid, | |
3424 | int type); | |
ade2e0b3 WS |
3425 | int btrfs_previous_extent_item(struct btrfs_root *root, |
3426 | struct btrfs_path *path, u64 min_objectid); | |
afe5fea7 | 3427 | void btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path, |
143bede5 | 3428 | struct btrfs_key *new_key); |
925baedd CM |
3429 | struct extent_buffer *btrfs_root_node(struct btrfs_root *root); |
3430 | struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); | |
e7a84565 | 3431 | int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, |
3f157a2f | 3432 | struct btrfs_key *key, int lowest_level, |
de78b51a | 3433 | u64 min_trans); |
3f157a2f | 3434 | int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, |
de78b51a | 3435 | struct btrfs_path *path, |
3f157a2f | 3436 | u64 min_trans); |
7069830a AB |
3437 | enum btrfs_compare_tree_result { |
3438 | BTRFS_COMPARE_TREE_NEW, | |
3439 | BTRFS_COMPARE_TREE_DELETED, | |
3440 | BTRFS_COMPARE_TREE_CHANGED, | |
ba5e8f2e | 3441 | BTRFS_COMPARE_TREE_SAME, |
7069830a AB |
3442 | }; |
3443 | typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root, | |
3444 | struct btrfs_root *right_root, | |
3445 | struct btrfs_path *left_path, | |
3446 | struct btrfs_path *right_path, | |
3447 | struct btrfs_key *key, | |
3448 | enum btrfs_compare_tree_result result, | |
3449 | void *ctx); | |
3450 | int btrfs_compare_trees(struct btrfs_root *left_root, | |
3451 | struct btrfs_root *right_root, | |
3452 | btrfs_changed_cb_t cb, void *ctx); | |
5f39d397 CM |
3453 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
3454 | struct btrfs_root *root, struct extent_buffer *buf, | |
3455 | struct extent_buffer *parent, int parent_slot, | |
9fa8cfe7 | 3456 | struct extent_buffer **cow_ret); |
be20aa9d CM |
3457 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
3458 | struct btrfs_root *root, | |
3459 | struct extent_buffer *buf, | |
3460 | struct extent_buffer **cow_ret, u64 new_root_objectid); | |
5d4f98a2 YZ |
3461 | int btrfs_block_can_be_shared(struct btrfs_root *root, |
3462 | struct extent_buffer *buf); | |
4b90c680 | 3463 | void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path, |
143bede5 | 3464 | u32 data_size); |
afe5fea7 | 3465 | void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path, |
143bede5 | 3466 | u32 new_size, int from_end); |
459931ec CM |
3467 | int btrfs_split_item(struct btrfs_trans_handle *trans, |
3468 | struct btrfs_root *root, | |
3469 | struct btrfs_path *path, | |
3470 | struct btrfs_key *new_key, | |
3471 | unsigned long split_offset); | |
ad48fd75 YZ |
3472 | int btrfs_duplicate_item(struct btrfs_trans_handle *trans, |
3473 | struct btrfs_root *root, | |
3474 | struct btrfs_path *path, | |
3475 | struct btrfs_key *new_key); | |
e33d5c3d KN |
3476 | int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, |
3477 | u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); | |
e089f05c CM |
3478 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
3479 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
3480 | ins_len, int cow); | |
5d9e75c4 JS |
3481 | int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key, |
3482 | struct btrfs_path *p, u64 time_seq); | |
2f38b3e1 AJ |
3483 | int btrfs_search_slot_for_read(struct btrfs_root *root, |
3484 | struct btrfs_key *key, struct btrfs_path *p, | |
3485 | int find_higher, int return_any); | |
6702ed49 | 3486 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
5f39d397 | 3487 | struct btrfs_root *root, struct extent_buffer *parent, |
de78b51a | 3488 | int start_slot, u64 *last_ret, |
a6b6e75e | 3489 | struct btrfs_key *progress); |
b3b4aa74 | 3490 | void btrfs_release_path(struct btrfs_path *p); |
2c90e5d6 CM |
3491 | struct btrfs_path *btrfs_alloc_path(void); |
3492 | void btrfs_free_path(struct btrfs_path *p); | |
b4ce94de | 3493 | void btrfs_set_path_blocking(struct btrfs_path *p); |
16cdcec7 | 3494 | void btrfs_clear_path_blocking(struct btrfs_path *p, |
bd681513 | 3495 | struct extent_buffer *held, int held_rw); |
b4ce94de CM |
3496 | void btrfs_unlock_up_safe(struct btrfs_path *p, int level); |
3497 | ||
85e21bac CM |
3498 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
3499 | struct btrfs_path *path, int slot, int nr); | |
85e21bac CM |
3500 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, |
3501 | struct btrfs_root *root, | |
3502 | struct btrfs_path *path) | |
3503 | { | |
3504 | return btrfs_del_items(trans, root, path, path->slots[0], 1); | |
3505 | } | |
3506 | ||
afe5fea7 | 3507 | void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, |
143bede5 JM |
3508 | struct btrfs_key *cpu_key, u32 *data_size, |
3509 | u32 total_data, u32 total_size, int nr); | |
e089f05c CM |
3510 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
3511 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
9c58309d CM |
3512 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
3513 | struct btrfs_root *root, | |
3514 | struct btrfs_path *path, | |
3515 | struct btrfs_key *cpu_key, u32 *data_size, int nr); | |
3516 | ||
3517 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, | |
3518 | struct btrfs_root *root, | |
3519 | struct btrfs_path *path, | |
3520 | struct btrfs_key *key, | |
3521 | u32 data_size) | |
3522 | { | |
3523 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); | |
3524 | } | |
3525 | ||
234b63a0 | 3526 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
16e7549f | 3527 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
3d7806ec JS |
3528 | int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, |
3529 | u64 time_seq); | |
1c8f52a5 AB |
3530 | static inline int btrfs_next_old_item(struct btrfs_root *root, |
3531 | struct btrfs_path *p, u64 time_seq) | |
c7d22a3c JS |
3532 | { |
3533 | ++p->slots[0]; | |
3534 | if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) | |
1c8f52a5 | 3535 | return btrfs_next_old_leaf(root, p, time_seq); |
c7d22a3c JS |
3536 | return 0; |
3537 | } | |
1c8f52a5 AB |
3538 | static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) |
3539 | { | |
3540 | return btrfs_next_old_item(root, p, 0); | |
3541 | } | |
5f39d397 | 3542 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
2c536799 JM |
3543 | int __must_check btrfs_drop_snapshot(struct btrfs_root *root, |
3544 | struct btrfs_block_rsv *block_rsv, | |
3545 | int update_ref, int for_reloc); | |
f82d02d9 YZ |
3546 | int btrfs_drop_subtree(struct btrfs_trans_handle *trans, |
3547 | struct btrfs_root *root, | |
3548 | struct extent_buffer *node, | |
3549 | struct extent_buffer *parent); | |
7841cb28 DS |
3550 | static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) |
3551 | { | |
3552 | /* | |
3553 | * Get synced with close_ctree() | |
3554 | */ | |
3555 | smp_mb(); | |
3556 | return fs_info->closing; | |
3557 | } | |
babbf170 MX |
3558 | |
3559 | /* | |
3560 | * If we remount the fs to be R/O or umount the fs, the cleaner needn't do | |
3561 | * anything except sleeping. This function is used to check the status of | |
3562 | * the fs. | |
3563 | */ | |
3564 | static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root) | |
3565 | { | |
3566 | return (root->fs_info->sb->s_flags & MS_RDONLY || | |
3567 | btrfs_fs_closing(root->fs_info)); | |
3568 | } | |
3569 | ||
6c41761f DS |
3570 | static inline void free_fs_info(struct btrfs_fs_info *fs_info) |
3571 | { | |
837d5b6e | 3572 | kfree(fs_info->balance_ctl); |
6c41761f DS |
3573 | kfree(fs_info->delayed_root); |
3574 | kfree(fs_info->extent_root); | |
3575 | kfree(fs_info->tree_root); | |
3576 | kfree(fs_info->chunk_root); | |
3577 | kfree(fs_info->dev_root); | |
3578 | kfree(fs_info->csum_root); | |
bcef60f2 | 3579 | kfree(fs_info->quota_root); |
d8f98039 | 3580 | kfree(fs_info->uuid_root); |
6c41761f DS |
3581 | kfree(fs_info->super_copy); |
3582 | kfree(fs_info->super_for_commit); | |
3583 | kfree(fs_info); | |
3584 | } | |
7841cb28 | 3585 | |
097b8a7c JS |
3586 | /* tree mod log functions from ctree.c */ |
3587 | u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, | |
3588 | struct seq_list *elem); | |
3589 | void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, | |
3590 | struct seq_list *elem); | |
5b6602e7 | 3591 | int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); |
097b8a7c | 3592 | |
dee26a9f | 3593 | /* root-item.c */ |
ea9e8b11 | 3594 | int btrfs_find_root_ref(struct btrfs_root *tree_root, |
4df27c4d YZ |
3595 | struct btrfs_path *path, |
3596 | u64 root_id, u64 ref_id); | |
0660b5af CM |
3597 | int btrfs_add_root_ref(struct btrfs_trans_handle *trans, |
3598 | struct btrfs_root *tree_root, | |
4df27c4d YZ |
3599 | u64 root_id, u64 ref_id, u64 dirid, u64 sequence, |
3600 | const char *name, int name_len); | |
3601 | int btrfs_del_root_ref(struct btrfs_trans_handle *trans, | |
3602 | struct btrfs_root *tree_root, | |
3603 | u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, | |
0660b5af | 3604 | const char *name, int name_len); |
e089f05c CM |
3605 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
3606 | struct btrfs_key *key); | |
3607 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
3608 | *root, struct btrfs_key *key, struct btrfs_root_item | |
3609 | *item); | |
b45a9d8b JM |
3610 | int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, |
3611 | struct btrfs_root *root, | |
3612 | struct btrfs_key *key, | |
3613 | struct btrfs_root_item *item); | |
cb517eab MX |
3614 | int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key, |
3615 | struct btrfs_path *path, struct btrfs_root_item *root_item, | |
3616 | struct btrfs_key *root_key); | |
76dda93c | 3617 | int btrfs_find_orphan_roots(struct btrfs_root *tree_root); |
bf5f32ec MF |
3618 | void btrfs_set_root_node(struct btrfs_root_item *item, |
3619 | struct extent_buffer *node); | |
08fe4db1 | 3620 | void btrfs_check_and_init_root_item(struct btrfs_root_item *item); |
8ea05e3a AB |
3621 | void btrfs_update_root_times(struct btrfs_trans_handle *trans, |
3622 | struct btrfs_root *root); | |
08fe4db1 | 3623 | |
07b30a49 SB |
3624 | /* uuid-tree.c */ |
3625 | int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, | |
3626 | struct btrfs_root *uuid_root, u8 *uuid, u8 type, | |
3627 | u64 subid); | |
3628 | int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans, | |
3629 | struct btrfs_root *uuid_root, u8 *uuid, u8 type, | |
3630 | u64 subid); | |
70f80175 SB |
3631 | int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, |
3632 | int (*check_func)(struct btrfs_fs_info *, u8 *, u8, | |
3633 | u64)); | |
07b30a49 | 3634 | |
dee26a9f | 3635 | /* dir-item.c */ |
9c52057c CM |
3636 | int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, |
3637 | const char *name, int name_len); | |
d397712b CM |
3638 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, |
3639 | struct btrfs_root *root, const char *name, | |
16cdcec7 | 3640 | int name_len, struct inode *dir, |
aec7477b | 3641 | struct btrfs_key *location, u8 type, u64 index); |
7e38180e CM |
3642 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
3643 | struct btrfs_root *root, | |
3644 | struct btrfs_path *path, u64 dir, | |
3645 | const char *name, int name_len, | |
3646 | int mod); | |
3647 | struct btrfs_dir_item * | |
3648 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | |
3649 | struct btrfs_root *root, | |
3650 | struct btrfs_path *path, u64 dir, | |
3651 | u64 objectid, const char *name, int name_len, | |
3652 | int mod); | |
4df27c4d YZ |
3653 | struct btrfs_dir_item * |
3654 | btrfs_search_dir_index_item(struct btrfs_root *root, | |
3655 | struct btrfs_path *path, u64 dirid, | |
3656 | const char *name, int name_len); | |
7e38180e CM |
3657 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
3658 | struct btrfs_root *root, | |
3659 | struct btrfs_path *path, | |
3660 | struct btrfs_dir_item *di); | |
5103e947 | 3661 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
f34f57a3 YZ |
3662 | struct btrfs_root *root, |
3663 | struct btrfs_path *path, u64 objectid, | |
3664 | const char *name, u16 name_len, | |
3665 | const void *data, u16 data_len); | |
5103e947 JB |
3666 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, |
3667 | struct btrfs_root *root, | |
3668 | struct btrfs_path *path, u64 dir, | |
3669 | const char *name, u16 name_len, | |
3670 | int mod); | |
22a94d44 JB |
3671 | int verify_dir_item(struct btrfs_root *root, |
3672 | struct extent_buffer *leaf, | |
3673 | struct btrfs_dir_item *dir_item); | |
7b128766 JB |
3674 | |
3675 | /* orphan.c */ | |
3676 | int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, | |
3677 | struct btrfs_root *root, u64 offset); | |
3678 | int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, | |
3679 | struct btrfs_root *root, u64 offset); | |
4df27c4d | 3680 | int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); |
7b128766 | 3681 | |
dee26a9f | 3682 | /* inode-item.c */ |
3954401f CM |
3683 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
3684 | struct btrfs_root *root, | |
3685 | const char *name, int name_len, | |
aec7477b | 3686 | u64 inode_objectid, u64 ref_objectid, u64 index); |
3954401f CM |
3687 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, |
3688 | struct btrfs_root *root, | |
3689 | const char *name, int name_len, | |
aec7477b | 3690 | u64 inode_objectid, u64 ref_objectid, u64 *index); |
5f39d397 CM |
3691 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
3692 | struct btrfs_root *root, | |
3693 | struct btrfs_path *path, u64 objectid); | |
293ffd5f | 3694 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
3695 | *root, struct btrfs_path *path, |
3696 | struct btrfs_key *location, int mod); | |
dee26a9f | 3697 | |
f186373f MF |
3698 | struct btrfs_inode_extref * |
3699 | btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, | |
3700 | struct btrfs_root *root, | |
3701 | struct btrfs_path *path, | |
3702 | const char *name, int name_len, | |
3703 | u64 inode_objectid, u64 ref_objectid, int ins_len, | |
3704 | int cow); | |
3705 | ||
3706 | int btrfs_find_name_in_ext_backref(struct btrfs_path *path, | |
3707 | u64 ref_objectid, const char *name, | |
3708 | int name_len, | |
3709 | struct btrfs_inode_extref **extref_ret); | |
3710 | ||
dee26a9f | 3711 | /* file-item.c */ |
facc8a22 | 3712 | struct btrfs_dio_private; |
459931ec CM |
3713 | int btrfs_del_csums(struct btrfs_trans_handle *trans, |
3714 | struct btrfs_root *root, u64 bytenr, u64 len); | |
61b49440 | 3715 | int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, |
d20f7043 | 3716 | struct bio *bio, u32 *dst); |
4b46fce2 | 3717 | int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode, |
facc8a22 MX |
3718 | struct btrfs_dio_private *dip, struct bio *bio, |
3719 | u64 logical_offset); | |
b18c6685 | 3720 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
c8b97818 CM |
3721 | struct btrfs_root *root, |
3722 | u64 objectid, u64 pos, | |
3723 | u64 disk_offset, u64 disk_num_bytes, | |
3724 | u64 num_bytes, u64 offset, u64 ram_bytes, | |
3725 | u8 compression, u8 encryption, u16 other_encoding); | |
dee26a9f CM |
3726 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
3727 | struct btrfs_root *root, | |
3728 | struct btrfs_path *path, u64 objectid, | |
db94535d | 3729 | u64 bytenr, int mod); |
065631f6 | 3730 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
d20f7043 | 3731 | struct btrfs_root *root, |
e6dcd2dc | 3732 | struct btrfs_ordered_sum *sums); |
3edf7d33 | 3733 | int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, |
d20f7043 | 3734 | struct bio *bio, u64 file_start, int contig); |
a2de733c AJ |
3735 | int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, |
3736 | struct list_head *list, int search_commit); | |
39279cc3 | 3737 | /* inode.c */ |
8ccf6f19 MX |
3738 | struct btrfs_delalloc_work { |
3739 | struct inode *inode; | |
3740 | int wait; | |
3741 | int delay_iput; | |
3742 | struct completion completion; | |
3743 | struct list_head list; | |
3744 | struct btrfs_work work; | |
3745 | }; | |
3746 | ||
3747 | struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode, | |
3748 | int wait, int delay_iput); | |
3749 | void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work); | |
3750 | ||
b2675157 JB |
3751 | struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page, |
3752 | size_t pg_offset, u64 start, u64 len, | |
3753 | int create); | |
00361589 | 3754 | noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, |
7ee9e440 JB |
3755 | u64 *orig_start, u64 *orig_block_len, |
3756 | u64 *ram_bytes); | |
4881ee5a CM |
3757 | |
3758 | /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ | |
5036f538 | 3759 | #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) |
4881ee5a CM |
3760 | #define ClearPageChecked ClearPageFsMisc |
3761 | #define SetPageChecked SetPageFsMisc | |
3762 | #define PageChecked PageFsMisc | |
3763 | #endif | |
3764 | ||
b6973aa6 LZ |
3765 | /* This forces readahead on a given range of bytes in an inode */ |
3766 | static inline void btrfs_force_ra(struct address_space *mapping, | |
3767 | struct file_ra_state *ra, struct file *file, | |
3768 | pgoff_t offset, unsigned long req_size) | |
3769 | { | |
3770 | page_cache_sync_readahead(mapping, ra, file, offset, req_size); | |
3771 | } | |
3772 | ||
3de4586c CM |
3773 | struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); |
3774 | int btrfs_set_inode_index(struct inode *dir, u64 *index); | |
e02119d5 CM |
3775 | int btrfs_unlink_inode(struct btrfs_trans_handle *trans, |
3776 | struct btrfs_root *root, | |
3777 | struct inode *dir, struct inode *inode, | |
3778 | const char *name, int name_len); | |
3779 | int btrfs_add_link(struct btrfs_trans_handle *trans, | |
3780 | struct inode *parent_inode, struct inode *inode, | |
3781 | const char *name, int name_len, int add_backref, u64 index); | |
4df27c4d YZ |
3782 | int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, |
3783 | struct btrfs_root *root, | |
3784 | struct inode *dir, u64 objectid, | |
3785 | const char *name, int name_len); | |
2aaa6655 JB |
3786 | int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len, |
3787 | int front); | |
e02119d5 CM |
3788 | int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, |
3789 | struct btrfs_root *root, | |
3790 | struct inode *inode, u64 new_size, | |
3791 | u32 min_type); | |
3792 | ||
24bbcf04 | 3793 | int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); |
6c255e67 MX |
3794 | int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput, |
3795 | int nr); | |
2ac55d41 JB |
3796 | int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, |
3797 | struct extent_state **cached_state); | |
d2fb3437 | 3798 | int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, |
63541927 FDBM |
3799 | struct btrfs_root *new_root, |
3800 | struct btrfs_root *parent_root, | |
3801 | u64 new_dirid); | |
64a16701 DW |
3802 | int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset, |
3803 | size_t size, struct bio *bio, | |
3804 | unsigned long bio_flags); | |
c2ec175c | 3805 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); |
9ebefb18 | 3806 | int btrfs_readpage(struct file *file, struct page *page); |
bd555975 | 3807 | void btrfs_evict_inode(struct inode *inode); |
a9185b41 | 3808 | int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); |
39279cc3 CM |
3809 | struct inode *btrfs_alloc_inode(struct super_block *sb); |
3810 | void btrfs_destroy_inode(struct inode *inode); | |
45321ac5 | 3811 | int btrfs_drop_inode(struct inode *inode); |
39279cc3 CM |
3812 | int btrfs_init_cachep(void); |
3813 | void btrfs_destroy_cachep(void); | |
6bf13c0c | 3814 | long btrfs_ioctl_trans_end(struct file *file); |
1a54ef8c | 3815 | struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, |
73f73415 | 3816 | struct btrfs_root *root, int *was_new); |
a52d9a80 | 3817 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
306e16ce | 3818 | size_t pg_offset, u64 start, u64 end, |
a52d9a80 CM |
3819 | int create); |
3820 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
3821 | struct btrfs_root *root, | |
3822 | struct inode *inode); | |
be6aef60 JB |
3823 | int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, |
3824 | struct btrfs_root *root, struct inode *inode); | |
5b21f2ed | 3825 | int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode); |
66b4ffd1 | 3826 | int btrfs_orphan_cleanup(struct btrfs_root *root); |
d68fc57b YZ |
3827 | void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, |
3828 | struct btrfs_root *root); | |
a41ad394 | 3829 | int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); |
143bede5 | 3830 | void btrfs_invalidate_inodes(struct btrfs_root *root); |
24bbcf04 YZ |
3831 | void btrfs_add_delayed_iput(struct inode *inode); |
3832 | void btrfs_run_delayed_iputs(struct btrfs_root *root); | |
efa56464 YZ |
3833 | int btrfs_prealloc_file_range(struct inode *inode, int mode, |
3834 | u64 start, u64 num_bytes, u64 min_size, | |
3835 | loff_t actual_len, u64 *alloc_hint); | |
0af3d00b JB |
3836 | int btrfs_prealloc_file_range_trans(struct inode *inode, |
3837 | struct btrfs_trans_handle *trans, int mode, | |
3838 | u64 start, u64 num_bytes, u64 min_size, | |
3839 | loff_t actual_len, u64 *alloc_hint); | |
82d339d9 | 3840 | extern const struct dentry_operations btrfs_dentry_operations; |
f46b5a66 CH |
3841 | |
3842 | /* ioctl.c */ | |
3843 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); | |
6cbff00f CH |
3844 | void btrfs_update_iflags(struct inode *inode); |
3845 | void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); | |
dd5f9615 | 3846 | int btrfs_is_empty_uuid(u8 *uuid); |
4cb5300b CM |
3847 | int btrfs_defrag_file(struct inode *inode, struct file *file, |
3848 | struct btrfs_ioctl_defrag_range_args *range, | |
3849 | u64 newer_than, unsigned long max_pages); | |
5af3e8cc SB |
3850 | void btrfs_get_block_group_info(struct list_head *groups_list, |
3851 | struct btrfs_ioctl_space_info *space); | |
35a3621b SB |
3852 | void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock, |
3853 | struct btrfs_ioctl_balance_args *bargs); | |
3854 | ||
5af3e8cc | 3855 | |
39279cc3 | 3856 | /* file.c */ |
9247f317 MX |
3857 | int btrfs_auto_defrag_init(void); |
3858 | void btrfs_auto_defrag_exit(void); | |
4cb5300b CM |
3859 | int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, |
3860 | struct inode *inode); | |
3861 | int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); | |
26176e7c | 3862 | void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); |
02c24a82 | 3863 | int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); |
7014cdb4 JB |
3864 | void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, |
3865 | int skip_pinned); | |
828c0950 | 3866 | extern const struct file_operations btrfs_file_operations; |
5dc562c5 JB |
3867 | int __btrfs_drop_extents(struct btrfs_trans_handle *trans, |
3868 | struct btrfs_root *root, struct inode *inode, | |
3869 | struct btrfs_path *path, u64 start, u64 end, | |
1acae57b FDBM |
3870 | u64 *drop_end, int drop_cache, |
3871 | int replace_extent, | |
3872 | u32 extent_item_size, | |
3873 | int *key_inserted); | |
5dc562c5 JB |
3874 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, |
3875 | struct btrfs_root *root, struct inode *inode, u64 start, | |
2671485d | 3876 | u64 end, int drop_cache); |
d899e052 | 3877 | int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, |
d899e052 | 3878 | struct inode *inode, u64 start, u64 end); |
6bf13c0c | 3879 | int btrfs_release_file(struct inode *inode, struct file *file); |
be1a12a0 JB |
3880 | int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode, |
3881 | struct page **pages, size_t num_pages, | |
3882 | loff_t pos, size_t write_bytes, | |
3883 | struct extent_state **cached); | |
6bf13c0c | 3884 | |
6702ed49 CM |
3885 | /* tree-defrag.c */ |
3886 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | |
de78b51a | 3887 | struct btrfs_root *root); |
58176a96 JB |
3888 | |
3889 | /* sysfs.c */ | |
3890 | int btrfs_init_sysfs(void); | |
3891 | void btrfs_exit_sysfs(void); | |
5ac1d209 JM |
3892 | int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info); |
3893 | void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info); | |
58176a96 | 3894 | |
5103e947 JB |
3895 | /* xattr.c */ |
3896 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
6099afe8 | 3897 | |
edbd8d4e | 3898 | /* super.c */ |
edf24abe | 3899 | int btrfs_parse_options(struct btrfs_root *root, char *options); |
6bf13c0c | 3900 | int btrfs_sync_fs(struct super_block *sb, int wait); |
533574c6 JP |
3901 | |
3902 | #ifdef CONFIG_PRINTK | |
3903 | __printf(2, 3) | |
c2cf52eb | 3904 | void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); |
533574c6 JP |
3905 | #else |
3906 | static inline __printf(2, 3) | |
c2cf52eb | 3907 | void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) |
533574c6 JP |
3908 | { |
3909 | } | |
3910 | #endif | |
3911 | ||
c2cf52eb SK |
3912 | #define btrfs_emerg(fs_info, fmt, args...) \ |
3913 | btrfs_printk(fs_info, KERN_EMERG fmt, ##args) | |
3914 | #define btrfs_alert(fs_info, fmt, args...) \ | |
3915 | btrfs_printk(fs_info, KERN_ALERT fmt, ##args) | |
3916 | #define btrfs_crit(fs_info, fmt, args...) \ | |
3917 | btrfs_printk(fs_info, KERN_CRIT fmt, ##args) | |
3918 | #define btrfs_err(fs_info, fmt, args...) \ | |
3919 | btrfs_printk(fs_info, KERN_ERR fmt, ##args) | |
3920 | #define btrfs_warn(fs_info, fmt, args...) \ | |
3921 | btrfs_printk(fs_info, KERN_WARNING fmt, ##args) | |
3922 | #define btrfs_notice(fs_info, fmt, args...) \ | |
3923 | btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) | |
3924 | #define btrfs_info(fs_info, fmt, args...) \ | |
3925 | btrfs_printk(fs_info, KERN_INFO fmt, ##args) | |
27a0dd61 FH |
3926 | |
3927 | #ifdef DEBUG | |
c2cf52eb SK |
3928 | #define btrfs_debug(fs_info, fmt, args...) \ |
3929 | btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) | |
27a0dd61 FH |
3930 | #else |
3931 | #define btrfs_debug(fs_info, fmt, args...) \ | |
3932 | no_printk(KERN_DEBUG fmt, ##args) | |
3933 | #endif | |
c2cf52eb | 3934 | |
2e17c7c6 JB |
3935 | #ifdef CONFIG_BTRFS_ASSERT |
3936 | ||
3937 | static inline void assfail(char *expr, char *file, int line) | |
3938 | { | |
efe120a0 | 3939 | pr_err("BTRFS: assertion failed: %s, file: %s, line: %d", |
2e17c7c6 JB |
3940 | expr, file, line); |
3941 | BUG(); | |
3942 | } | |
3943 | ||
3944 | #define ASSERT(expr) \ | |
3945 | (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) | |
3946 | #else | |
3947 | #define ASSERT(expr) ((void)0) | |
3948 | #endif | |
3949 | ||
3950 | #define btrfs_assert() | |
533574c6 | 3951 | __printf(5, 6) |
acce952b | 3952 | void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function, |
4da35113 | 3953 | unsigned int line, int errno, const char *fmt, ...); |
acce952b | 3954 | |
533574c6 | 3955 | |
49b25e05 JM |
3956 | void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, |
3957 | struct btrfs_root *root, const char *function, | |
3958 | unsigned int line, int errno); | |
3959 | ||
2b0ce2c2 MH |
3960 | #define btrfs_set_fs_incompat(__fs_info, opt) \ |
3961 | __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) | |
3962 | ||
3963 | static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, | |
3964 | u64 flag) | |
3965 | { | |
3966 | struct btrfs_super_block *disk_super; | |
3967 | u64 features; | |
3968 | ||
3969 | disk_super = fs_info->super_copy; | |
3970 | features = btrfs_super_incompat_flags(disk_super); | |
3971 | if (!(features & flag)) { | |
ceda0864 MX |
3972 | spin_lock(&fs_info->super_lock); |
3973 | features = btrfs_super_incompat_flags(disk_super); | |
3974 | if (!(features & flag)) { | |
3975 | features |= flag; | |
3976 | btrfs_set_super_incompat_flags(disk_super, features); | |
efe120a0 | 3977 | btrfs_info(fs_info, "setting %llu feature flag", |
ceda0864 MX |
3978 | flag); |
3979 | } | |
3980 | spin_unlock(&fs_info->super_lock); | |
2b0ce2c2 MH |
3981 | } |
3982 | } | |
3983 | ||
3173a18f JB |
3984 | #define btrfs_fs_incompat(fs_info, opt) \ |
3985 | __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) | |
3986 | ||
3987 | static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) | |
3988 | { | |
3989 | struct btrfs_super_block *disk_super; | |
3990 | disk_super = fs_info->super_copy; | |
3991 | return !!(btrfs_super_incompat_flags(disk_super) & flag); | |
3992 | } | |
3993 | ||
005d6427 DS |
3994 | /* |
3995 | * Call btrfs_abort_transaction as early as possible when an error condition is | |
3996 | * detected, that way the exact line number is reported. | |
3997 | */ | |
3998 | ||
49b25e05 JM |
3999 | #define btrfs_abort_transaction(trans, root, errno) \ |
4000 | do { \ | |
4001 | __btrfs_abort_transaction(trans, root, __func__, \ | |
4002 | __LINE__, errno); \ | |
4003 | } while (0) | |
acce952b | 4004 | |
4005 | #define btrfs_std_error(fs_info, errno) \ | |
4006 | do { \ | |
4007 | if ((errno)) \ | |
4da35113 JM |
4008 | __btrfs_std_error((fs_info), __func__, \ |
4009 | __LINE__, (errno), NULL); \ | |
4010 | } while (0) | |
4011 | ||
4012 | #define btrfs_error(fs_info, errno, fmt, args...) \ | |
4013 | do { \ | |
4014 | __btrfs_std_error((fs_info), __func__, __LINE__, \ | |
4015 | (errno), fmt, ##args); \ | |
acce952b | 4016 | } while (0) |
33268eaf | 4017 | |
533574c6 | 4018 | __printf(5, 6) |
8c342930 JM |
4019 | void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, |
4020 | unsigned int line, int errno, const char *fmt, ...); | |
4021 | ||
aa43a17c ES |
4022 | /* |
4023 | * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic | |
4024 | * will panic(). Otherwise we BUG() here. | |
4025 | */ | |
8c342930 JM |
4026 | #define btrfs_panic(fs_info, errno, fmt, args...) \ |
4027 | do { \ | |
aa43a17c ES |
4028 | __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ |
4029 | BUG(); \ | |
acce952b | 4030 | } while (0) |
33268eaf JB |
4031 | |
4032 | /* acl.c */ | |
0eda294d | 4033 | #ifdef CONFIG_BTRFS_FS_POSIX_ACL |
4e34e719 | 4034 | struct posix_acl *btrfs_get_acl(struct inode *inode, int type); |
996a710d | 4035 | int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); |
f34f57a3 YZ |
4036 | int btrfs_init_acl(struct btrfs_trans_handle *trans, |
4037 | struct inode *inode, struct inode *dir); | |
9b89d95a | 4038 | #else |
ed8f3737 | 4039 | #define btrfs_get_acl NULL |
996a710d | 4040 | #define btrfs_set_acl NULL |
9b89d95a LZ |
4041 | static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, |
4042 | struct inode *inode, struct inode *dir) | |
4043 | { | |
4044 | return 0; | |
4045 | } | |
9b89d95a | 4046 | #endif |
0f9dd46c | 4047 | |
5d4f98a2 YZ |
4048 | /* relocation.c */ |
4049 | int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start); | |
4050 | int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, | |
4051 | struct btrfs_root *root); | |
4052 | int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, | |
4053 | struct btrfs_root *root); | |
4054 | int btrfs_recover_relocation(struct btrfs_root *root); | |
4055 | int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); | |
83d4cfd4 JB |
4056 | int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, |
4057 | struct btrfs_root *root, struct extent_buffer *buf, | |
4058 | struct extent_buffer *cow); | |
3fd0a558 YZ |
4059 | void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans, |
4060 | struct btrfs_pending_snapshot *pending, | |
4061 | u64 *bytes_to_reserve); | |
49b25e05 | 4062 | int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, |
3fd0a558 | 4063 | struct btrfs_pending_snapshot *pending); |
a2de733c AJ |
4064 | |
4065 | /* scrub.c */ | |
aa1b8cd4 SB |
4066 | int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, |
4067 | u64 end, struct btrfs_scrub_progress *progress, | |
63a212ab | 4068 | int readonly, int is_dev_replace); |
143bede5 | 4069 | void btrfs_scrub_pause(struct btrfs_root *root); |
143bede5 | 4070 | void btrfs_scrub_continue(struct btrfs_root *root); |
aa1b8cd4 SB |
4071 | int btrfs_scrub_cancel(struct btrfs_fs_info *info); |
4072 | int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, | |
4073 | struct btrfs_device *dev); | |
a2de733c AJ |
4074 | int btrfs_scrub_progress(struct btrfs_root *root, u64 devid, |
4075 | struct btrfs_scrub_progress *progress); | |
c404e0dc MX |
4076 | |
4077 | /* dev-replace.c */ | |
4078 | void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); | |
4079 | void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); | |
4080 | void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info); | |
a2de733c | 4081 | |
7414a03f AJ |
4082 | /* reada.c */ |
4083 | struct reada_control { | |
4084 | struct btrfs_root *root; /* tree to prefetch */ | |
4085 | struct btrfs_key key_start; | |
4086 | struct btrfs_key key_end; /* exclusive */ | |
4087 | atomic_t elems; | |
4088 | struct kref refcnt; | |
4089 | wait_queue_head_t wait; | |
4090 | }; | |
4091 | struct reada_control *btrfs_reada_add(struct btrfs_root *root, | |
4092 | struct btrfs_key *start, struct btrfs_key *end); | |
4093 | int btrfs_reada_wait(void *handle); | |
4094 | void btrfs_reada_detach(void *handle); | |
4095 | int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb, | |
4096 | u64 start, int err); | |
4097 | ||
95a06077 JS |
4098 | static inline int is_fstree(u64 rootid) |
4099 | { | |
4100 | if (rootid == BTRFS_FS_TREE_OBJECTID || | |
4101 | (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID) | |
4102 | return 1; | |
4103 | return 0; | |
4104 | } | |
210549eb DS |
4105 | |
4106 | static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) | |
4107 | { | |
4108 | return signal_pending(current); | |
4109 | } | |
4110 | ||
aaedb55b JB |
4111 | /* Sanity test specific functions */ |
4112 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS | |
4113 | void btrfs_test_destroy_inode(struct inode *inode); | |
4114 | #endif | |
210549eb | 4115 | |
eb60ceac | 4116 | #endif |