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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> |
d1310b2e | 36 | #include "extent_io.h" |
5f39d397 | 37 | #include "extent_map.h" |
8b712842 | 38 | #include "async-thread.h" |
e20d96d6 | 39 | |
e089f05c | 40 | struct btrfs_trans_handle; |
79154b1b | 41 | struct btrfs_transaction; |
a22285a6 | 42 | struct btrfs_pending_snapshot; |
35b7e476 CM |
43 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
44 | extern struct kmem_cache *btrfs_transaction_cachep; | |
45 | extern struct kmem_cache *btrfs_bit_radix_cachep; | |
2c90e5d6 | 46 | extern struct kmem_cache *btrfs_path_cachep; |
dc89e982 | 47 | extern struct kmem_cache *btrfs_free_space_cachep; |
e6dcd2dc | 48 | struct btrfs_ordered_sum; |
e089f05c | 49 | |
294e30fe JB |
50 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
51 | #define STATIC noinline | |
52 | #else | |
53 | #define STATIC static noinline | |
54 | #endif | |
55 | ||
cdb4c574 | 56 | #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ |
eb60ceac | 57 | |
72d7aefc | 58 | #define BTRFS_MAX_MIRRORS 3 |
94598ba8 | 59 | |
4008c04a | 60 | #define BTRFS_MAX_LEVEL 8 |
0b86a832 | 61 | |
5d4f98a2 YZ |
62 | #define BTRFS_COMPAT_EXTENT_TREE_V0 |
63 | ||
5a3f23d5 CM |
64 | /* |
65 | * files bigger than this get some pre-flushing when they are added | |
66 | * to the ordered operations list. That way we limit the total | |
67 | * work done by the commit | |
68 | */ | |
69 | #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024) | |
70 | ||
0b86a832 | 71 | /* holds pointers to all of the tree roots */ |
6407bf6d | 72 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
0b86a832 CM |
73 | |
74 | /* stores information about which extents are in use, and reference counts */ | |
0cf6c620 | 75 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
0b86a832 | 76 | |
0b86a832 CM |
77 | /* |
78 | * chunk tree stores translations from logical -> physical block numbering | |
79 | * the super block points to the chunk tree | |
80 | */ | |
e085def2 | 81 | #define BTRFS_CHUNK_TREE_OBJECTID 3ULL |
0b86a832 CM |
82 | |
83 | /* | |
84 | * stores information about which areas of a given device are in use. | |
85 | * one per device. The tree of tree roots points to the device tree | |
86 | */ | |
e085def2 CM |
87 | #define BTRFS_DEV_TREE_OBJECTID 4ULL |
88 | ||
89 | /* one per subvolume, storing files and directories */ | |
90 | #define BTRFS_FS_TREE_OBJECTID 5ULL | |
91 | ||
92 | /* directory objectid inside the root tree */ | |
93 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL | |
0b86a832 | 94 | |
d20f7043 CM |
95 | /* holds checksums of all the data extents */ |
96 | #define BTRFS_CSUM_TREE_OBJECTID 7ULL | |
97 | ||
630dc772 AJ |
98 | /* holds quota configuration and tracking */ |
99 | #define BTRFS_QUOTA_TREE_OBJECTID 8ULL | |
100 | ||
07b30a49 SB |
101 | /* for storing items that use the BTRFS_UUID_KEY* types */ |
102 | #define BTRFS_UUID_TREE_OBJECTID 9ULL | |
103 | ||
60b62978 DS |
104 | /* for storing balance parameters in the root tree */ |
105 | #define BTRFS_BALANCE_OBJECTID -4ULL | |
106 | ||
7b128766 JB |
107 | /* orhpan objectid for tracking unlinked/truncated files */ |
108 | #define BTRFS_ORPHAN_OBJECTID -5ULL | |
109 | ||
e02119d5 CM |
110 | /* does write ahead logging to speed up fsyncs */ |
111 | #define BTRFS_TREE_LOG_OBJECTID -6ULL | |
112 | #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL | |
113 | ||
e4657689 ZY |
114 | /* for space balancing */ |
115 | #define BTRFS_TREE_RELOC_OBJECTID -8ULL | |
116 | #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL | |
117 | ||
d20f7043 CM |
118 | /* |
119 | * extent checksums all have this objectid | |
120 | * this allows them to share the logging tree | |
121 | * for fsyncs | |
122 | */ | |
123 | #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL | |
124 | ||
0af3d00b JB |
125 | /* For storing free space cache */ |
126 | #define BTRFS_FREE_SPACE_OBJECTID -11ULL | |
127 | ||
82d5902d | 128 | /* |
527a1361 | 129 | * The inode number assigned to the special inode for storing |
82d5902d LZ |
130 | * free ino cache |
131 | */ | |
132 | #define BTRFS_FREE_INO_OBJECTID -12ULL | |
133 | ||
31840ae1 ZY |
134 | /* dummy objectid represents multiple objectids */ |
135 | #define BTRFS_MULTIPLE_OBJECTIDS -255ULL | |
136 | ||
0b86a832 | 137 | /* |
6527cdbe | 138 | * All files have objectids in this range. |
0b86a832 | 139 | */ |
f6dbff55 | 140 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
6527cdbe | 141 | #define BTRFS_LAST_FREE_OBJECTID -256ULL |
e17cade2 | 142 | #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL |
3768f368 | 143 | |
0b86a832 CM |
144 | |
145 | /* | |
146 | * the device items go into the chunk tree. The key is in the form | |
147 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] | |
148 | */ | |
149 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL | |
150 | ||
4df27c4d YZ |
151 | #define BTRFS_BTREE_INODE_OBJECTID 1 |
152 | ||
153 | #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2 | |
154 | ||
6e71c47a | 155 | #define BTRFS_DEV_REPLACE_DEVID 0ULL |
e93c89c1 | 156 | |
727011e0 CM |
157 | /* |
158 | * the max metadata block size. This limit is somewhat artificial, | |
159 | * but the memmove costs go through the roof for larger blocks. | |
160 | */ | |
161 | #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 | |
162 | ||
e20d96d6 CM |
163 | /* |
164 | * we can actually store much bigger names, but lets not confuse the rest | |
165 | * of linux | |
166 | */ | |
167 | #define BTRFS_NAME_LEN 255 | |
168 | ||
f186373f MF |
169 | /* |
170 | * Theoretical limit is larger, but we keep this down to a sane | |
171 | * value. That should limit greatly the possibility of collisions on | |
172 | * inode ref items. | |
173 | */ | |
174 | #define BTRFS_LINK_MAX 65535U | |
175 | ||
f254e52c CM |
176 | /* 32 bytes in various csum fields */ |
177 | #define BTRFS_CSUM_SIZE 32 | |
607d432d JB |
178 | |
179 | /* csum types */ | |
180 | #define BTRFS_CSUM_TYPE_CRC32 0 | |
181 | ||
182 | static int btrfs_csum_sizes[] = { 4, 0 }; | |
183 | ||
509659cd | 184 | /* four bytes for CRC32 */ |
3954401f | 185 | #define BTRFS_EMPTY_DIR_SIZE 0 |
f254e52c | 186 | |
29a8d9a0 SB |
187 | /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */ |
188 | #define REQ_GET_READ_MIRRORS (1 << 30) | |
189 | ||
fabb5681 CM |
190 | #define BTRFS_FT_UNKNOWN 0 |
191 | #define BTRFS_FT_REG_FILE 1 | |
192 | #define BTRFS_FT_DIR 2 | |
193 | #define BTRFS_FT_CHRDEV 3 | |
194 | #define BTRFS_FT_BLKDEV 4 | |
195 | #define BTRFS_FT_FIFO 5 | |
196 | #define BTRFS_FT_SOCK 6 | |
197 | #define BTRFS_FT_SYMLINK 7 | |
5103e947 JB |
198 | #define BTRFS_FT_XATTR 8 |
199 | #define BTRFS_FT_MAX 9 | |
fabb5681 | 200 | |
3d136a11 SB |
201 | /* ioprio of readahead is set to idle */ |
202 | #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) | |
203 | ||
e2d84521 MX |
204 | #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024) |
205 | ||
fec577fb | 206 | /* |
d4a78947 WF |
207 | * The key defines the order in the tree, and so it also defines (optimal) |
208 | * block layout. | |
209 | * | |
210 | * objectid corresponds to the inode number. | |
211 | * | |
212 | * type tells us things about the object, and is a kind of stream selector. | |
213 | * so for a given inode, keys with type of 1 might refer to the inode data, | |
214 | * type of 2 may point to file data in the btree and type == 3 may point to | |
215 | * extents. | |
fec577fb CM |
216 | * |
217 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
218 | * |
219 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
220 | * in cpu native order. Otherwise they are identical and their sizes | |
221 | * should be the same (ie both packed) | |
fec577fb | 222 | */ |
e2fa7227 CM |
223 | struct btrfs_disk_key { |
224 | __le64 objectid; | |
5f39d397 | 225 | u8 type; |
70b2befd | 226 | __le64 offset; |
e2fa7227 CM |
227 | } __attribute__ ((__packed__)); |
228 | ||
229 | struct btrfs_key { | |
eb60ceac | 230 | u64 objectid; |
5f39d397 | 231 | u8 type; |
70b2befd | 232 | u64 offset; |
eb60ceac CM |
233 | } __attribute__ ((__packed__)); |
234 | ||
0b86a832 CM |
235 | struct btrfs_mapping_tree { |
236 | struct extent_map_tree map_tree; | |
237 | }; | |
238 | ||
0b86a832 CM |
239 | struct btrfs_dev_item { |
240 | /* the internal btrfs device id */ | |
241 | __le64 devid; | |
242 | ||
243 | /* size of the device */ | |
244 | __le64 total_bytes; | |
245 | ||
246 | /* bytes used */ | |
247 | __le64 bytes_used; | |
248 | ||
249 | /* optimal io alignment for this device */ | |
250 | __le32 io_align; | |
251 | ||
252 | /* optimal io width for this device */ | |
253 | __le32 io_width; | |
254 | ||
255 | /* minimal io size for this device */ | |
256 | __le32 sector_size; | |
257 | ||
0b86a832 CM |
258 | /* type and info about this device */ |
259 | __le64 type; | |
260 | ||
2b82032c YZ |
261 | /* expected generation for this device */ |
262 | __le64 generation; | |
263 | ||
c3027eb5 CM |
264 | /* |
265 | * starting byte of this partition on the device, | |
d4a78947 | 266 | * to allow for stripe alignment in the future |
c3027eb5 CM |
267 | */ |
268 | __le64 start_offset; | |
269 | ||
e17cade2 CM |
270 | /* grouping information for allocation decisions */ |
271 | __le32 dev_group; | |
272 | ||
273 | /* seek speed 0-100 where 100 is fastest */ | |
274 | u8 seek_speed; | |
275 | ||
276 | /* bandwidth 0-100 where 100 is fastest */ | |
277 | u8 bandwidth; | |
278 | ||
0d81ba5d | 279 | /* btrfs generated uuid for this device */ |
e17cade2 | 280 | u8 uuid[BTRFS_UUID_SIZE]; |
2b82032c YZ |
281 | |
282 | /* uuid of FS who owns this device */ | |
283 | u8 fsid[BTRFS_UUID_SIZE]; | |
0b86a832 CM |
284 | } __attribute__ ((__packed__)); |
285 | ||
286 | struct btrfs_stripe { | |
287 | __le64 devid; | |
288 | __le64 offset; | |
e17cade2 | 289 | u8 dev_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
290 | } __attribute__ ((__packed__)); |
291 | ||
292 | struct btrfs_chunk { | |
e17cade2 CM |
293 | /* size of this chunk in bytes */ |
294 | __le64 length; | |
295 | ||
296 | /* objectid of the root referencing this chunk */ | |
0b86a832 | 297 | __le64 owner; |
e17cade2 | 298 | |
0b86a832 CM |
299 | __le64 stripe_len; |
300 | __le64 type; | |
301 | ||
302 | /* optimal io alignment for this chunk */ | |
303 | __le32 io_align; | |
304 | ||
305 | /* optimal io width for this chunk */ | |
306 | __le32 io_width; | |
307 | ||
308 | /* minimal io size for this chunk */ | |
309 | __le32 sector_size; | |
310 | ||
311 | /* 2^16 stripes is quite a lot, a second limit is the size of a single | |
312 | * item in the btree | |
313 | */ | |
314 | __le16 num_stripes; | |
321aecc6 CM |
315 | |
316 | /* sub stripes only matter for raid10 */ | |
317 | __le16 sub_stripes; | |
0b86a832 CM |
318 | struct btrfs_stripe stripe; |
319 | /* additional stripes go here */ | |
320 | } __attribute__ ((__packed__)); | |
321 | ||
0af3d00b JB |
322 | #define BTRFS_FREE_SPACE_EXTENT 1 |
323 | #define BTRFS_FREE_SPACE_BITMAP 2 | |
324 | ||
325 | struct btrfs_free_space_entry { | |
326 | __le64 offset; | |
327 | __le64 bytes; | |
328 | u8 type; | |
329 | } __attribute__ ((__packed__)); | |
330 | ||
331 | struct btrfs_free_space_header { | |
332 | struct btrfs_disk_key location; | |
333 | __le64 generation; | |
334 | __le64 num_entries; | |
335 | __le64 num_bitmaps; | |
336 | } __attribute__ ((__packed__)); | |
337 | ||
0b86a832 CM |
338 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) |
339 | { | |
340 | BUG_ON(num_stripes == 0); | |
341 | return sizeof(struct btrfs_chunk) + | |
342 | sizeof(struct btrfs_stripe) * (num_stripes - 1); | |
343 | } | |
344 | ||
5d4f98a2 YZ |
345 | #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) |
346 | #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) | |
acce952b | 347 | |
348 | /* | |
349 | * File system states | |
350 | */ | |
87533c47 | 351 | #define BTRFS_FS_STATE_ERROR 0 |
dc81cdc5 | 352 | #define BTRFS_FS_STATE_REMOUNTING 1 |
08748810 | 353 | #define BTRFS_FS_STATE_TRANS_ABORTED 2 |
acce952b | 354 | |
87533c47 | 355 | /* Super block flags */ |
acce952b | 356 | /* Errors detected */ |
357 | #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2) | |
358 | ||
5d4f98a2 YZ |
359 | #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32) |
360 | #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33) | |
361 | ||
362 | #define BTRFS_BACKREF_REV_MAX 256 | |
363 | #define BTRFS_BACKREF_REV_SHIFT 56 | |
364 | #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ | |
365 | BTRFS_BACKREF_REV_SHIFT) | |
366 | ||
367 | #define BTRFS_OLD_BACKREF_REV 0 | |
368 | #define BTRFS_MIXED_BACKREF_REV 1 | |
63b10fc4 | 369 | |
fec577fb CM |
370 | /* |
371 | * every tree block (leaf or node) starts with this header. | |
372 | */ | |
bb492bb0 | 373 | struct btrfs_header { |
e17cade2 | 374 | /* these first four must match the super block */ |
f254e52c | 375 | u8 csum[BTRFS_CSUM_SIZE]; |
5f39d397 | 376 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 377 | __le64 bytenr; /* which block this node is supposed to live in */ |
63b10fc4 | 378 | __le64 flags; |
e17cade2 CM |
379 | |
380 | /* allowed to be different from the super from here on down */ | |
381 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; | |
7f5c1516 | 382 | __le64 generation; |
4d775673 | 383 | __le64 owner; |
5f39d397 | 384 | __le32 nritems; |
9a6f11ed | 385 | u8 level; |
eb60ceac CM |
386 | } __attribute__ ((__packed__)); |
387 | ||
5f39d397 | 388 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
d397712b CM |
389 | sizeof(struct btrfs_header)) / \ |
390 | sizeof(struct btrfs_key_ptr)) | |
123abc88 | 391 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
5f39d397 | 392 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
236454df CM |
393 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
394 | sizeof(struct btrfs_item) - \ | |
395 | sizeof(struct btrfs_file_extent_item)) | |
f34f57a3 YZ |
396 | #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
397 | sizeof(struct btrfs_item) -\ | |
398 | sizeof(struct btrfs_dir_item)) | |
eb60ceac | 399 | |
0b86a832 CM |
400 | |
401 | /* | |
402 | * this is a very generous portion of the super block, giving us | |
403 | * room to translate 14 chunks with 3 stripes each. | |
404 | */ | |
405 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 | |
7ae9c09d | 406 | #define BTRFS_LABEL_SIZE 256 |
0b86a832 | 407 | |
af31f5e5 CM |
408 | /* |
409 | * just in case we somehow lose the roots and are not able to mount, | |
410 | * we store an array of the roots from previous transactions | |
411 | * in the super. | |
412 | */ | |
413 | #define BTRFS_NUM_BACKUP_ROOTS 4 | |
414 | struct btrfs_root_backup { | |
415 | __le64 tree_root; | |
416 | __le64 tree_root_gen; | |
417 | ||
418 | __le64 chunk_root; | |
419 | __le64 chunk_root_gen; | |
420 | ||
421 | __le64 extent_root; | |
422 | __le64 extent_root_gen; | |
423 | ||
424 | __le64 fs_root; | |
425 | __le64 fs_root_gen; | |
426 | ||
427 | __le64 dev_root; | |
428 | __le64 dev_root_gen; | |
429 | ||
430 | __le64 csum_root; | |
431 | __le64 csum_root_gen; | |
432 | ||
433 | __le64 total_bytes; | |
434 | __le64 bytes_used; | |
435 | __le64 num_devices; | |
436 | /* future */ | |
d1423248 | 437 | __le64 unused_64[4]; |
af31f5e5 CM |
438 | |
439 | u8 tree_root_level; | |
440 | u8 chunk_root_level; | |
441 | u8 extent_root_level; | |
442 | u8 fs_root_level; | |
443 | u8 dev_root_level; | |
444 | u8 csum_root_level; | |
445 | /* future and to align */ | |
446 | u8 unused_8[10]; | |
447 | } __attribute__ ((__packed__)); | |
448 | ||
fec577fb CM |
449 | /* |
450 | * the super block basically lists the main trees of the FS | |
451 | * it currently lacks any block count etc etc | |
452 | */ | |
234b63a0 | 453 | struct btrfs_super_block { |
f254e52c | 454 | u8 csum[BTRFS_CSUM_SIZE]; |
63b10fc4 | 455 | /* the first 4 fields must match struct btrfs_header */ |
2b82032c | 456 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 457 | __le64 bytenr; /* this block number */ |
63b10fc4 | 458 | __le64 flags; |
e17cade2 CM |
459 | |
460 | /* allowed to be different from the btrfs_header from here own down */ | |
3768f368 | 461 | __le64 magic; |
3768f368 CM |
462 | __le64 generation; |
463 | __le64 root; | |
0b86a832 | 464 | __le64 chunk_root; |
e02119d5 | 465 | __le64 log_root; |
c3027eb5 CM |
466 | |
467 | /* this will help find the new super based on the log root */ | |
468 | __le64 log_root_transid; | |
db94535d CM |
469 | __le64 total_bytes; |
470 | __le64 bytes_used; | |
2e635a27 | 471 | __le64 root_dir_objectid; |
8a4b83cc | 472 | __le64 num_devices; |
5f39d397 CM |
473 | __le32 sectorsize; |
474 | __le32 nodesize; | |
475 | __le32 leafsize; | |
87ee04eb | 476 | __le32 stripesize; |
0b86a832 | 477 | __le32 sys_chunk_array_size; |
84234f3a | 478 | __le64 chunk_root_generation; |
f2b636e8 JB |
479 | __le64 compat_flags; |
480 | __le64 compat_ro_flags; | |
481 | __le64 incompat_flags; | |
607d432d | 482 | __le16 csum_type; |
db94535d | 483 | u8 root_level; |
0b86a832 | 484 | u8 chunk_root_level; |
e02119d5 | 485 | u8 log_root_level; |
0d81ba5d | 486 | struct btrfs_dev_item dev_item; |
c3027eb5 | 487 | |
7ae9c09d | 488 | char label[BTRFS_LABEL_SIZE]; |
c3027eb5 | 489 | |
0af3d00b | 490 | __le64 cache_generation; |
26432799 | 491 | __le64 uuid_tree_generation; |
0af3d00b | 492 | |
c3027eb5 | 493 | /* future expansion */ |
26432799 | 494 | __le64 reserved[30]; |
0b86a832 | 495 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
af31f5e5 | 496 | struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; |
cfaa7295 CM |
497 | } __attribute__ ((__packed__)); |
498 | ||
f2b636e8 JB |
499 | /* |
500 | * Compat flags that we support. If any incompat flags are set other than the | |
501 | * ones specified below then we will fail to mount | |
502 | */ | |
5d4f98a2 | 503 | #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) |
0af3d00b | 504 | #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1) |
67377734 | 505 | #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2) |
a6fa6fae | 506 | #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3) |
727011e0 CM |
507 | /* |
508 | * some patches floated around with a second compression method | |
509 | * lets save that incompat here for when they do get in | |
510 | * Note we don't actually support it, we're just reserving the | |
511 | * number | |
512 | */ | |
513 | #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4) | |
514 | ||
515 | /* | |
516 | * older kernels tried to do bigger metadata blocks, but the | |
517 | * code was pretty buggy. Lets not let them try anymore. | |
518 | */ | |
519 | #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5) | |
5d4f98a2 | 520 | |
f186373f | 521 | #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6) |
53b381b3 | 522 | #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7) |
3173a18f | 523 | #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8) |
16e7549f | 524 | #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9) |
f186373f | 525 | |
5d4f98a2 | 526 | #define BTRFS_FEATURE_COMPAT_SUPP 0ULL |
2eaa055f JM |
527 | #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL |
528 | #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL | |
5d4f98a2 | 529 | #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL |
2eaa055f JM |
530 | #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL |
531 | #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL | |
532 | ||
0af3d00b JB |
533 | #define BTRFS_FEATURE_INCOMPAT_SUPP \ |
534 | (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ | |
67377734 | 535 | BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ |
a6fa6fae | 536 | BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ |
727011e0 | 537 | BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ |
f186373f | 538 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ |
53b381b3 | 539 | BTRFS_FEATURE_INCOMPAT_RAID56 | \ |
3173a18f | 540 | BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ |
16e7549f JB |
541 | BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ |
542 | BTRFS_FEATURE_INCOMPAT_NO_HOLES) | |
f2b636e8 | 543 | |
2eaa055f JM |
544 | #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ |
545 | (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) | |
546 | #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL | |
547 | ||
fec577fb | 548 | /* |
62e2749e | 549 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
550 | * the item in the leaf (relative to the start of the data area) |
551 | */ | |
0783fcfc | 552 | struct btrfs_item { |
e2fa7227 | 553 | struct btrfs_disk_key key; |
123abc88 | 554 | __le32 offset; |
5f39d397 | 555 | __le32 size; |
eb60ceac CM |
556 | } __attribute__ ((__packed__)); |
557 | ||
fec577fb CM |
558 | /* |
559 | * leaves have an item area and a data area: | |
560 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
561 | * | |
562 | * The data is separate from the items to get the keys closer together | |
563 | * during searches. | |
564 | */ | |
234b63a0 | 565 | struct btrfs_leaf { |
bb492bb0 | 566 | struct btrfs_header header; |
123abc88 | 567 | struct btrfs_item items[]; |
eb60ceac CM |
568 | } __attribute__ ((__packed__)); |
569 | ||
fec577fb CM |
570 | /* |
571 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
572 | * other blocks | |
573 | */ | |
123abc88 CM |
574 | struct btrfs_key_ptr { |
575 | struct btrfs_disk_key key; | |
576 | __le64 blockptr; | |
74493f7a | 577 | __le64 generation; |
123abc88 CM |
578 | } __attribute__ ((__packed__)); |
579 | ||
234b63a0 | 580 | struct btrfs_node { |
bb492bb0 | 581 | struct btrfs_header header; |
123abc88 | 582 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
583 | } __attribute__ ((__packed__)); |
584 | ||
fec577fb | 585 | /* |
234b63a0 CM |
586 | * btrfs_paths remember the path taken from the root down to the leaf. |
587 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
588 | * to any other levels that are present. |
589 | * | |
590 | * The slots array records the index of the item or block pointer | |
591 | * used while walking the tree. | |
592 | */ | |
234b63a0 | 593 | struct btrfs_path { |
5f39d397 | 594 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
234b63a0 | 595 | int slots[BTRFS_MAX_LEVEL]; |
925baedd CM |
596 | /* if there is real range locking, this locks field will change */ |
597 | int locks[BTRFS_MAX_LEVEL]; | |
3c69faec | 598 | int reada; |
925baedd | 599 | /* keep some upper locks as we walk down */ |
6702ed49 | 600 | int lowest_level; |
459931ec CM |
601 | |
602 | /* | |
603 | * set by btrfs_split_item, tells search_slot to keep all locks | |
604 | * and to force calls to keep space in the nodes | |
605 | */ | |
b9473439 CM |
606 | unsigned int search_for_split:1; |
607 | unsigned int keep_locks:1; | |
608 | unsigned int skip_locking:1; | |
609 | unsigned int leave_spinning:1; | |
5d4f98a2 | 610 | unsigned int search_commit_root:1; |
eb60ceac | 611 | }; |
5de08d7d | 612 | |
62e2749e CM |
613 | /* |
614 | * items in the extent btree are used to record the objectid of the | |
615 | * owner of the block and the number of references | |
616 | */ | |
5d4f98a2 | 617 | |
62e2749e | 618 | struct btrfs_extent_item { |
5d4f98a2 YZ |
619 | __le64 refs; |
620 | __le64 generation; | |
621 | __le64 flags; | |
622 | } __attribute__ ((__packed__)); | |
623 | ||
624 | struct btrfs_extent_item_v0 { | |
62e2749e | 625 | __le32 refs; |
74493f7a CM |
626 | } __attribute__ ((__packed__)); |
627 | ||
5d4f98a2 YZ |
628 | #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \ |
629 | sizeof(struct btrfs_item)) | |
630 | ||
631 | #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0) | |
632 | #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1) | |
633 | ||
634 | /* following flags only apply to tree blocks */ | |
635 | ||
636 | /* use full backrefs for extent pointers in the block */ | |
637 | #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8) | |
638 | ||
a2de733c AJ |
639 | /* |
640 | * this flag is only used internally by scrub and may be changed at any time | |
641 | * it is only declared here to avoid collisions | |
642 | */ | |
643 | #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48) | |
644 | ||
5d4f98a2 YZ |
645 | struct btrfs_tree_block_info { |
646 | struct btrfs_disk_key key; | |
647 | u8 level; | |
648 | } __attribute__ ((__packed__)); | |
649 | ||
650 | struct btrfs_extent_data_ref { | |
651 | __le64 root; | |
652 | __le64 objectid; | |
653 | __le64 offset; | |
654 | __le32 count; | |
655 | } __attribute__ ((__packed__)); | |
656 | ||
657 | struct btrfs_shared_data_ref { | |
658 | __le32 count; | |
659 | } __attribute__ ((__packed__)); | |
660 | ||
661 | struct btrfs_extent_inline_ref { | |
662 | u8 type; | |
1bec1aed | 663 | __le64 offset; |
5d4f98a2 YZ |
664 | } __attribute__ ((__packed__)); |
665 | ||
666 | /* old style backrefs item */ | |
667 | struct btrfs_extent_ref_v0 { | |
74493f7a CM |
668 | __le64 root; |
669 | __le64 generation; | |
670 | __le64 objectid; | |
5d4f98a2 | 671 | __le32 count; |
62e2749e CM |
672 | } __attribute__ ((__packed__)); |
673 | ||
5d4f98a2 | 674 | |
0b86a832 CM |
675 | /* dev extents record free space on individual devices. The owner |
676 | * field points back to the chunk allocation mapping tree that allocated | |
e17cade2 | 677 | * the extent. The chunk tree uuid field is a way to double check the owner |
0b86a832 CM |
678 | */ |
679 | struct btrfs_dev_extent { | |
e17cade2 CM |
680 | __le64 chunk_tree; |
681 | __le64 chunk_objectid; | |
682 | __le64 chunk_offset; | |
0b86a832 | 683 | __le64 length; |
e17cade2 | 684 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
685 | } __attribute__ ((__packed__)); |
686 | ||
3954401f | 687 | struct btrfs_inode_ref { |
aec7477b | 688 | __le64 index; |
3954401f CM |
689 | __le16 name_len; |
690 | /* name goes here */ | |
691 | } __attribute__ ((__packed__)); | |
692 | ||
f186373f MF |
693 | struct btrfs_inode_extref { |
694 | __le64 parent_objectid; | |
695 | __le64 index; | |
696 | __le16 name_len; | |
697 | __u8 name[0]; | |
698 | /* name goes here */ | |
699 | } __attribute__ ((__packed__)); | |
700 | ||
0b86a832 | 701 | struct btrfs_timespec { |
f254e52c | 702 | __le64 sec; |
1e1d2701 CM |
703 | __le32 nsec; |
704 | } __attribute__ ((__packed__)); | |
705 | ||
95029d7d | 706 | enum btrfs_compression_type { |
261507a0 LZ |
707 | BTRFS_COMPRESS_NONE = 0, |
708 | BTRFS_COMPRESS_ZLIB = 1, | |
a6fa6fae LZ |
709 | BTRFS_COMPRESS_LZO = 2, |
710 | BTRFS_COMPRESS_TYPES = 2, | |
711 | BTRFS_COMPRESS_LAST = 3, | |
95029d7d | 712 | }; |
c8b97818 | 713 | |
1e1d2701 | 714 | struct btrfs_inode_item { |
e02119d5 | 715 | /* nfs style generation number */ |
1e1d2701 | 716 | __le64 generation; |
e02119d5 CM |
717 | /* transid that last touched this inode */ |
718 | __le64 transid; | |
1e1d2701 | 719 | __le64 size; |
a76a3cd4 | 720 | __le64 nbytes; |
31f3c99b | 721 | __le64 block_group; |
1e1d2701 CM |
722 | __le32 nlink; |
723 | __le32 uid; | |
724 | __le32 gid; | |
725 | __le32 mode; | |
0b86a832 | 726 | __le64 rdev; |
f2b636e8 | 727 | __le64 flags; |
c8b97818 | 728 | |
c3027eb5 CM |
729 | /* modification sequence number for NFS */ |
730 | __le64 sequence; | |
731 | ||
732 | /* | |
733 | * a little future expansion, for more than this we can | |
734 | * just grow the inode item and version it | |
735 | */ | |
736 | __le64 reserved[4]; | |
0b86a832 CM |
737 | struct btrfs_timespec atime; |
738 | struct btrfs_timespec ctime; | |
739 | struct btrfs_timespec mtime; | |
740 | struct btrfs_timespec otime; | |
1e1d2701 CM |
741 | } __attribute__ ((__packed__)); |
742 | ||
e02119d5 CM |
743 | struct btrfs_dir_log_item { |
744 | __le64 end; | |
745 | } __attribute__ ((__packed__)); | |
746 | ||
62e2749e | 747 | struct btrfs_dir_item { |
d6e4a428 | 748 | struct btrfs_disk_key location; |
e02119d5 | 749 | __le64 transid; |
5103e947 | 750 | __le16 data_len; |
a8a2ee0c | 751 | __le16 name_len; |
62e2749e CM |
752 | u8 type; |
753 | } __attribute__ ((__packed__)); | |
754 | ||
b83cc969 LZ |
755 | #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0) |
756 | ||
62e2749e | 757 | struct btrfs_root_item { |
d6e4a428 | 758 | struct btrfs_inode_item inode; |
84234f3a | 759 | __le64 generation; |
d6e4a428 | 760 | __le64 root_dirid; |
db94535d CM |
761 | __le64 bytenr; |
762 | __le64 byte_limit; | |
763 | __le64 bytes_used; | |
80ff3856 | 764 | __le64 last_snapshot; |
f2b636e8 | 765 | __le64 flags; |
62e2749e | 766 | __le32 refs; |
5eda7b5e CM |
767 | struct btrfs_disk_key drop_progress; |
768 | u8 drop_level; | |
db94535d | 769 | u8 level; |
8ea05e3a AB |
770 | |
771 | /* | |
772 | * The following fields appear after subvol_uuids+subvol_times | |
773 | * were introduced. | |
774 | */ | |
775 | ||
776 | /* | |
777 | * This generation number is used to test if the new fields are valid | |
778 | * and up to date while reading the root item. Everytime the root item | |
779 | * is written out, the "generation" field is copied into this field. If | |
780 | * anyone ever mounted the fs with an older kernel, we will have | |
781 | * mismatching generation values here and thus must invalidate the | |
782 | * new fields. See btrfs_update_root and btrfs_find_last_root for | |
783 | * details. | |
784 | * the offset of generation_v2 is also used as the start for the memset | |
785 | * when invalidating the fields. | |
786 | */ | |
787 | __le64 generation_v2; | |
788 | u8 uuid[BTRFS_UUID_SIZE]; | |
789 | u8 parent_uuid[BTRFS_UUID_SIZE]; | |
790 | u8 received_uuid[BTRFS_UUID_SIZE]; | |
791 | __le64 ctransid; /* updated when an inode changes */ | |
792 | __le64 otransid; /* trans when created */ | |
793 | __le64 stransid; /* trans when sent. non-zero for received subvol */ | |
794 | __le64 rtransid; /* trans when received. non-zero for received subvol */ | |
795 | struct btrfs_timespec ctime; | |
796 | struct btrfs_timespec otime; | |
797 | struct btrfs_timespec stime; | |
798 | struct btrfs_timespec rtime; | |
799 | __le64 reserved[8]; /* for future */ | |
9f5fae2f | 800 | } __attribute__ ((__packed__)); |
62e2749e | 801 | |
0660b5af CM |
802 | /* |
803 | * this is used for both forward and backward root refs | |
804 | */ | |
805 | struct btrfs_root_ref { | |
806 | __le64 dirid; | |
807 | __le64 sequence; | |
808 | __le16 name_len; | |
809 | } __attribute__ ((__packed__)); | |
810 | ||
0940ebf6 ID |
811 | struct btrfs_disk_balance_args { |
812 | /* | |
813 | * profiles to operate on, single is denoted by | |
814 | * BTRFS_AVAIL_ALLOC_BIT_SINGLE | |
815 | */ | |
816 | __le64 profiles; | |
817 | ||
818 | /* usage filter */ | |
819 | __le64 usage; | |
820 | ||
821 | /* devid filter */ | |
822 | __le64 devid; | |
823 | ||
824 | /* devid subset filter [pstart..pend) */ | |
825 | __le64 pstart; | |
826 | __le64 pend; | |
827 | ||
828 | /* btrfs virtual address space subset filter [vstart..vend) */ | |
829 | __le64 vstart; | |
830 | __le64 vend; | |
831 | ||
832 | /* | |
833 | * profile to convert to, single is denoted by | |
834 | * BTRFS_AVAIL_ALLOC_BIT_SINGLE | |
835 | */ | |
836 | __le64 target; | |
837 | ||
838 | /* BTRFS_BALANCE_ARGS_* */ | |
839 | __le64 flags; | |
840 | ||
841 | __le64 unused[8]; | |
842 | } __attribute__ ((__packed__)); | |
843 | ||
844 | /* | |
845 | * store balance parameters to disk so that balance can be properly | |
846 | * resumed after crash or unmount | |
847 | */ | |
848 | struct btrfs_balance_item { | |
849 | /* BTRFS_BALANCE_* */ | |
850 | __le64 flags; | |
851 | ||
852 | struct btrfs_disk_balance_args data; | |
853 | struct btrfs_disk_balance_args meta; | |
854 | struct btrfs_disk_balance_args sys; | |
855 | ||
856 | __le64 unused[4]; | |
857 | } __attribute__ ((__packed__)); | |
858 | ||
d899e052 YZ |
859 | #define BTRFS_FILE_EXTENT_INLINE 0 |
860 | #define BTRFS_FILE_EXTENT_REG 1 | |
861 | #define BTRFS_FILE_EXTENT_PREALLOC 2 | |
236454df | 862 | |
9f5fae2f | 863 | struct btrfs_file_extent_item { |
c8b97818 CM |
864 | /* |
865 | * transaction id that created this extent | |
866 | */ | |
71951f35 | 867 | __le64 generation; |
c8b97818 CM |
868 | /* |
869 | * max number of bytes to hold this extent in ram | |
870 | * when we split a compressed extent we can't know how big | |
871 | * each of the resulting pieces will be. So, this is | |
872 | * an upper limit on the size of the extent in ram instead of | |
873 | * an exact limit. | |
874 | */ | |
875 | __le64 ram_bytes; | |
876 | ||
877 | /* | |
878 | * 32 bits for the various ways we might encode the data, | |
879 | * including compression and encryption. If any of these | |
880 | * are set to something a given disk format doesn't understand | |
881 | * it is treated like an incompat flag for reading and writing, | |
882 | * but not for stat. | |
883 | */ | |
884 | u8 compression; | |
885 | u8 encryption; | |
886 | __le16 other_encoding; /* spare for later use */ | |
887 | ||
888 | /* are we inline data or a real extent? */ | |
236454df | 889 | u8 type; |
c8b97818 | 890 | |
9f5fae2f CM |
891 | /* |
892 | * disk space consumed by the extent, checksum blocks are included | |
893 | * in these numbers | |
894 | */ | |
db94535d CM |
895 | __le64 disk_bytenr; |
896 | __le64 disk_num_bytes; | |
9f5fae2f | 897 | /* |
dee26a9f | 898 | * the logical offset in file blocks (no csums) |
9f5fae2f CM |
899 | * this extent record is for. This allows a file extent to point |
900 | * into the middle of an existing extent on disk, sharing it | |
901 | * between two snapshots (useful if some bytes in the middle of the | |
902 | * extent have changed | |
903 | */ | |
904 | __le64 offset; | |
905 | /* | |
c8b97818 CM |
906 | * the logical number of file blocks (no csums included). This |
907 | * always reflects the size uncompressed and without encoding. | |
9f5fae2f | 908 | */ |
db94535d | 909 | __le64 num_bytes; |
c8b97818 | 910 | |
9f5fae2f CM |
911 | } __attribute__ ((__packed__)); |
912 | ||
f254e52c | 913 | struct btrfs_csum_item { |
509659cd | 914 | u8 csum; |
f254e52c CM |
915 | } __attribute__ ((__packed__)); |
916 | ||
733f4fbb SB |
917 | struct btrfs_dev_stats_item { |
918 | /* | |
919 | * grow this item struct at the end for future enhancements and keep | |
920 | * the existing values unchanged | |
921 | */ | |
922 | __le64 values[BTRFS_DEV_STAT_VALUES_MAX]; | |
923 | } __attribute__ ((__packed__)); | |
924 | ||
e922e087 SB |
925 | #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0 |
926 | #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1 | |
927 | #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0 | |
928 | #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1 | |
929 | #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2 | |
930 | #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3 | |
931 | #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4 | |
932 | ||
933 | struct btrfs_dev_replace { | |
934 | u64 replace_state; /* see #define above */ | |
935 | u64 time_started; /* seconds since 1-Jan-1970 */ | |
936 | u64 time_stopped; /* seconds since 1-Jan-1970 */ | |
937 | atomic64_t num_write_errors; | |
938 | atomic64_t num_uncorrectable_read_errors; | |
939 | ||
940 | u64 cursor_left; | |
941 | u64 committed_cursor_left; | |
942 | u64 cursor_left_last_write_of_item; | |
943 | u64 cursor_right; | |
944 | ||
945 | u64 cont_reading_from_srcdev_mode; /* see #define above */ | |
946 | ||
947 | int is_valid; | |
948 | int item_needs_writeback; | |
949 | struct btrfs_device *srcdev; | |
950 | struct btrfs_device *tgtdev; | |
951 | ||
952 | pid_t lock_owner; | |
953 | atomic_t nesting_level; | |
954 | struct mutex lock_finishing_cancel_unmount; | |
955 | struct mutex lock_management_lock; | |
956 | struct mutex lock; | |
957 | ||
958 | struct btrfs_scrub_progress scrub_progress; | |
959 | }; | |
960 | ||
a2bff640 SB |
961 | struct btrfs_dev_replace_item { |
962 | /* | |
963 | * grow this item struct at the end for future enhancements and keep | |
964 | * the existing values unchanged | |
965 | */ | |
966 | __le64 src_devid; | |
967 | __le64 cursor_left; | |
968 | __le64 cursor_right; | |
969 | __le64 cont_reading_from_srcdev_mode; | |
970 | ||
971 | __le64 replace_state; | |
972 | __le64 time_started; | |
973 | __le64 time_stopped; | |
974 | __le64 num_write_errors; | |
975 | __le64 num_uncorrectable_read_errors; | |
976 | } __attribute__ ((__packed__)); | |
977 | ||
0b86a832 | 978 | /* different types of block groups (and chunks) */ |
52ba6929 ID |
979 | #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0) |
980 | #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1) | |
981 | #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2) | |
982 | #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3) | |
983 | #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4) | |
984 | #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5) | |
985 | #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6) | |
1c89cdd1 AP |
986 | #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7) |
987 | #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8) | |
a46d11a8 | 988 | #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE |
e6ec716f MX |
989 | |
990 | enum btrfs_raid_types { | |
991 | BTRFS_RAID_RAID10, | |
992 | BTRFS_RAID_RAID1, | |
993 | BTRFS_RAID_DUP, | |
994 | BTRFS_RAID_RAID0, | |
995 | BTRFS_RAID_SINGLE, | |
e942f883 CM |
996 | BTRFS_RAID_RAID5, |
997 | BTRFS_RAID_RAID6, | |
e6ec716f MX |
998 | BTRFS_NR_RAID_TYPES |
999 | }; | |
52ba6929 ID |
1000 | |
1001 | #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \ | |
1002 | BTRFS_BLOCK_GROUP_SYSTEM | \ | |
1003 | BTRFS_BLOCK_GROUP_METADATA) | |
1004 | ||
1005 | #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \ | |
1006 | BTRFS_BLOCK_GROUP_RAID1 | \ | |
53b381b3 DW |
1007 | BTRFS_BLOCK_GROUP_RAID5 | \ |
1008 | BTRFS_BLOCK_GROUP_RAID6 | \ | |
52ba6929 ID |
1009 | BTRFS_BLOCK_GROUP_DUP | \ |
1010 | BTRFS_BLOCK_GROUP_RAID10) | |
a46d11a8 ID |
1011 | /* |
1012 | * We need a bit for restriper to be able to tell when chunks of type | |
1013 | * SINGLE are available. This "extended" profile format is used in | |
1014 | * fs_info->avail_*_alloc_bits (in-memory) and balance item fields | |
1015 | * (on-disk). The corresponding on-disk bit in chunk.type is reserved | |
1016 | * to avoid remappings between two formats in future. | |
1017 | */ | |
1018 | #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48) | |
1019 | ||
899c81ea ID |
1020 | #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \ |
1021 | BTRFS_AVAIL_ALLOC_BIT_SINGLE) | |
1022 | ||
1023 | static inline u64 chunk_to_extended(u64 flags) | |
1024 | { | |
1025 | if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0) | |
1026 | flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE; | |
1027 | ||
1028 | return flags; | |
1029 | } | |
1030 | static inline u64 extended_to_chunk(u64 flags) | |
1031 | { | |
1032 | return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE; | |
1033 | } | |
1034 | ||
9078a3e1 CM |
1035 | struct btrfs_block_group_item { |
1036 | __le64 used; | |
0b86a832 CM |
1037 | __le64 chunk_objectid; |
1038 | __le64 flags; | |
9078a3e1 CM |
1039 | } __attribute__ ((__packed__)); |
1040 | ||
630dc772 AJ |
1041 | /* |
1042 | * is subvolume quota turned on? | |
1043 | */ | |
1044 | #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0) | |
1045 | /* | |
2f232036 | 1046 | * RESCAN is set during the initialization phase |
630dc772 | 1047 | */ |
2f232036 | 1048 | #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1) |
630dc772 AJ |
1049 | /* |
1050 | * Some qgroup entries are known to be out of date, | |
1051 | * either because the configuration has changed in a way that | |
1052 | * makes a rescan necessary, or because the fs has been mounted | |
1053 | * with a non-qgroup-aware version. | |
1054 | * Turning qouta off and on again makes it inconsistent, too. | |
1055 | */ | |
1056 | #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2) | |
1057 | ||
1058 | #define BTRFS_QGROUP_STATUS_VERSION 1 | |
1059 | ||
1060 | struct btrfs_qgroup_status_item { | |
1061 | __le64 version; | |
1062 | /* | |
1063 | * the generation is updated during every commit. As older | |
1064 | * versions of btrfs are not aware of qgroups, it will be | |
1065 | * possible to detect inconsistencies by checking the | |
1066 | * generation on mount time | |
1067 | */ | |
1068 | __le64 generation; | |
1069 | ||
1070 | /* flag definitions see above */ | |
1071 | __le64 flags; | |
1072 | ||
1073 | /* | |
1074 | * only used during scanning to record the progress | |
1075 | * of the scan. It contains a logical address | |
1076 | */ | |
2f232036 | 1077 | __le64 rescan; |
630dc772 AJ |
1078 | } __attribute__ ((__packed__)); |
1079 | ||
1080 | struct btrfs_qgroup_info_item { | |
1081 | __le64 generation; | |
1082 | __le64 rfer; | |
1083 | __le64 rfer_cmpr; | |
1084 | __le64 excl; | |
1085 | __le64 excl_cmpr; | |
1086 | } __attribute__ ((__packed__)); | |
1087 | ||
1088 | /* flags definition for qgroup limits */ | |
1089 | #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0) | |
1090 | #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1) | |
1091 | #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2) | |
1092 | #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3) | |
1093 | #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4) | |
1094 | #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5) | |
1095 | ||
1096 | struct btrfs_qgroup_limit_item { | |
1097 | /* | |
1098 | * only updated when any of the other values change | |
1099 | */ | |
1100 | __le64 flags; | |
1101 | __le64 max_rfer; | |
1102 | __le64 max_excl; | |
1103 | __le64 rsv_rfer; | |
1104 | __le64 rsv_excl; | |
1105 | } __attribute__ ((__packed__)); | |
1106 | ||
6324fbf3 CM |
1107 | struct btrfs_space_info { |
1108 | u64 flags; | |
6a63209f | 1109 | |
89a55897 JB |
1110 | u64 total_bytes; /* total bytes in the space, |
1111 | this doesn't take mirrors into account */ | |
b742bb82 | 1112 | u64 bytes_used; /* total bytes used, |
e9c54999 | 1113 | this doesn't take mirrors into account */ |
6a63209f JB |
1114 | u64 bytes_pinned; /* total bytes pinned, will be freed when the |
1115 | transaction finishes */ | |
1116 | u64 bytes_reserved; /* total bytes the allocator has reserved for | |
1117 | current allocations */ | |
1118 | u64 bytes_readonly; /* total bytes that are read only */ | |
8929ecfa | 1119 | |
6a63209f | 1120 | u64 bytes_may_use; /* number of bytes that may be used for |
9ed74f2d | 1121 | delalloc/allocations */ |
b742bb82 | 1122 | u64 disk_used; /* total bytes used on disk */ |
89a55897 JB |
1123 | u64 disk_total; /* total bytes on disk, takes mirrors into |
1124 | account */ | |
6a63209f | 1125 | |
b150a4f1 JB |
1126 | /* |
1127 | * bytes_pinned is kept in line with what is actually pinned, as in | |
1128 | * we've called update_block_group and dropped the bytes_used counter | |
1129 | * and increased the bytes_pinned counter. However this means that | |
1130 | * bytes_pinned does not reflect the bytes that will be pinned once the | |
1131 | * delayed refs are flushed, so this counter is inc'ed everytime we call | |
1132 | * btrfs_free_extent so it is a realtime count of what will be freed | |
1133 | * once the transaction is committed. It will be zero'ed everytime the | |
1134 | * transaction commits. | |
1135 | */ | |
1136 | struct percpu_counter total_bytes_pinned; | |
1137 | ||
4ea02885 | 1138 | unsigned int full:1; /* indicates that we cannot allocate any more |
6a63209f | 1139 | chunks for this space */ |
4ea02885 | 1140 | unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ |
6d74119f | 1141 | |
fdb5effd JB |
1142 | unsigned int flush:1; /* set if we are trying to make space */ |
1143 | ||
4ea02885 DS |
1144 | unsigned int force_alloc; /* set if we need to force a chunk |
1145 | alloc for this space */ | |
6a63209f | 1146 | |
6324fbf3 | 1147 | struct list_head list; |
0f9dd46c JB |
1148 | |
1149 | /* for block groups in our same type */ | |
b742bb82 | 1150 | struct list_head block_groups[BTRFS_NR_RAID_TYPES]; |
0f9dd46c | 1151 | spinlock_t lock; |
80eb234a | 1152 | struct rw_semaphore groups_sem; |
fdb5effd | 1153 | wait_queue_head_t wait; |
6ab0a202 JM |
1154 | |
1155 | struct kobject kobj; | |
1156 | struct kobject block_group_kobjs[BTRFS_NR_RAID_TYPES]; | |
0f9dd46c JB |
1157 | }; |
1158 | ||
66d8f3dd MX |
1159 | #define BTRFS_BLOCK_RSV_GLOBAL 1 |
1160 | #define BTRFS_BLOCK_RSV_DELALLOC 2 | |
1161 | #define BTRFS_BLOCK_RSV_TRANS 3 | |
1162 | #define BTRFS_BLOCK_RSV_CHUNK 4 | |
1163 | #define BTRFS_BLOCK_RSV_DELOPS 5 | |
1164 | #define BTRFS_BLOCK_RSV_EMPTY 6 | |
1165 | #define BTRFS_BLOCK_RSV_TEMP 7 | |
1166 | ||
f0486c68 YZ |
1167 | struct btrfs_block_rsv { |
1168 | u64 size; | |
1169 | u64 reserved; | |
f0486c68 | 1170 | struct btrfs_space_info *space_info; |
f0486c68 | 1171 | spinlock_t lock; |
66d8f3dd MX |
1172 | unsigned short full; |
1173 | unsigned short type; | |
1174 | unsigned short failfast; | |
f0486c68 YZ |
1175 | }; |
1176 | ||
fa9c0d79 CM |
1177 | /* |
1178 | * free clusters are used to claim free space in relatively large chunks, | |
1179 | * allowing us to do less seeky writes. They are used for all metadata | |
1180 | * allocations and data allocations in ssd mode. | |
1181 | */ | |
1182 | struct btrfs_free_cluster { | |
1183 | spinlock_t lock; | |
1184 | spinlock_t refill_lock; | |
1185 | struct rb_root root; | |
1186 | ||
1187 | /* largest extent in this cluster */ | |
1188 | u64 max_size; | |
1189 | ||
1190 | /* first extent starting offset */ | |
1191 | u64 window_start; | |
1192 | ||
1193 | struct btrfs_block_group_cache *block_group; | |
1194 | /* | |
1195 | * when a cluster is allocated from a block group, we put the | |
1196 | * cluster onto a list in the block group so that it can | |
1197 | * be freed before the block group is freed. | |
1198 | */ | |
1199 | struct list_head block_group_list; | |
6324fbf3 CM |
1200 | }; |
1201 | ||
817d52f8 JB |
1202 | enum btrfs_caching_type { |
1203 | BTRFS_CACHE_NO = 0, | |
1204 | BTRFS_CACHE_STARTED = 1, | |
291c7d2f JB |
1205 | BTRFS_CACHE_FAST = 2, |
1206 | BTRFS_CACHE_FINISHED = 3, | |
36cce922 | 1207 | BTRFS_CACHE_ERROR = 4, |
817d52f8 JB |
1208 | }; |
1209 | ||
0af3d00b JB |
1210 | enum btrfs_disk_cache_state { |
1211 | BTRFS_DC_WRITTEN = 0, | |
1212 | BTRFS_DC_ERROR = 1, | |
1213 | BTRFS_DC_CLEAR = 2, | |
1214 | BTRFS_DC_SETUP = 3, | |
1215 | BTRFS_DC_NEED_WRITE = 4, | |
1216 | }; | |
1217 | ||
11833d66 YZ |
1218 | struct btrfs_caching_control { |
1219 | struct list_head list; | |
1220 | struct mutex mutex; | |
1221 | wait_queue_head_t wait; | |
bab39bf9 | 1222 | struct btrfs_work work; |
11833d66 YZ |
1223 | struct btrfs_block_group_cache *block_group; |
1224 | u64 progress; | |
1225 | atomic_t count; | |
1226 | }; | |
1227 | ||
9078a3e1 CM |
1228 | struct btrfs_block_group_cache { |
1229 | struct btrfs_key key; | |
1230 | struct btrfs_block_group_item item; | |
817d52f8 | 1231 | struct btrfs_fs_info *fs_info; |
0af3d00b | 1232 | struct inode *inode; |
c286ac48 | 1233 | spinlock_t lock; |
324ae4df | 1234 | u64 pinned; |
e8569813 | 1235 | u64 reserved; |
1b2da372 | 1236 | u64 bytes_super; |
0b86a832 | 1237 | u64 flags; |
96303081 | 1238 | u64 sectorsize; |
5b0e95bf | 1239 | u64 cache_generation; |
53b381b3 DW |
1240 | |
1241 | /* for raid56, this is a full stripe, without parity */ | |
1242 | unsigned long full_stripe_len; | |
1243 | ||
0410c94a MK |
1244 | unsigned int ro:1; |
1245 | unsigned int dirty:1; | |
1246 | unsigned int iref:1; | |
0af3d00b JB |
1247 | |
1248 | int disk_cache_state; | |
0f9dd46c | 1249 | |
817d52f8 | 1250 | /* cache tracking stuff */ |
817d52f8 | 1251 | int cached; |
11833d66 YZ |
1252 | struct btrfs_caching_control *caching_ctl; |
1253 | u64 last_byte_to_unpin; | |
817d52f8 | 1254 | |
0f9dd46c JB |
1255 | struct btrfs_space_info *space_info; |
1256 | ||
1257 | /* free space cache stuff */ | |
34d52cb6 | 1258 | struct btrfs_free_space_ctl *free_space_ctl; |
0f9dd46c JB |
1259 | |
1260 | /* block group cache stuff */ | |
1261 | struct rb_node cache_node; | |
1262 | ||
1263 | /* for block groups in the same raid type */ | |
1264 | struct list_head list; | |
d2fb3437 YZ |
1265 | |
1266 | /* usage count */ | |
1267 | atomic_t count; | |
fa9c0d79 CM |
1268 | |
1269 | /* List of struct btrfs_free_clusters for this block group. | |
1270 | * Today it will only have one thing on it, but that may change | |
1271 | */ | |
1272 | struct list_head cluster_list; | |
ea658bad JB |
1273 | |
1274 | /* For delayed block group creation */ | |
1275 | struct list_head new_bg_list; | |
9078a3e1 | 1276 | }; |
0b86a832 | 1277 | |
097b8a7c JS |
1278 | /* delayed seq elem */ |
1279 | struct seq_list { | |
1280 | struct list_head list; | |
1281 | u64 seq; | |
1282 | }; | |
1283 | ||
5d80366e JB |
1284 | enum btrfs_orphan_cleanup_state { |
1285 | ORPHAN_CLEANUP_STARTED = 1, | |
1286 | ORPHAN_CLEANUP_DONE = 2, | |
1287 | }; | |
1288 | ||
53b381b3 DW |
1289 | /* used by the raid56 code to lock stripes for read/modify/write */ |
1290 | struct btrfs_stripe_hash { | |
1291 | struct list_head hash_list; | |
1292 | wait_queue_head_t wait; | |
1293 | spinlock_t lock; | |
1294 | }; | |
1295 | ||
1296 | /* used by the raid56 code to lock stripes for read/modify/write */ | |
1297 | struct btrfs_stripe_hash_table { | |
4ae10b3a CM |
1298 | struct list_head stripe_cache; |
1299 | spinlock_t cache_lock; | |
1300 | int cache_size; | |
1301 | struct btrfs_stripe_hash table[]; | |
53b381b3 DW |
1302 | }; |
1303 | ||
1304 | #define BTRFS_STRIPE_HASH_TABLE_BITS 11 | |
1305 | ||
097b8a7c | 1306 | /* fs_info */ |
5d4f98a2 | 1307 | struct reloc_control; |
0b86a832 | 1308 | struct btrfs_device; |
8a4b83cc | 1309 | struct btrfs_fs_devices; |
c9e9f97b | 1310 | struct btrfs_balance_control; |
16cdcec7 | 1311 | struct btrfs_delayed_root; |
9f5fae2f | 1312 | struct btrfs_fs_info { |
5f39d397 | 1313 | u8 fsid[BTRFS_FSID_SIZE]; |
e17cade2 | 1314 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
62e2749e CM |
1315 | struct btrfs_root *extent_root; |
1316 | struct btrfs_root *tree_root; | |
0b86a832 CM |
1317 | struct btrfs_root *chunk_root; |
1318 | struct btrfs_root *dev_root; | |
3de4586c | 1319 | struct btrfs_root *fs_root; |
d20f7043 | 1320 | struct btrfs_root *csum_root; |
416ac51d | 1321 | struct btrfs_root *quota_root; |
f7a81ea4 | 1322 | struct btrfs_root *uuid_root; |
e02119d5 CM |
1323 | |
1324 | /* the log root tree is a directory of all the other log roots */ | |
1325 | struct btrfs_root *log_root_tree; | |
4df27c4d YZ |
1326 | |
1327 | spinlock_t fs_roots_radix_lock; | |
0f7d52f4 | 1328 | struct radix_tree_root fs_roots_radix; |
1a5bc167 | 1329 | |
0f9dd46c JB |
1330 | /* block group cache stuff */ |
1331 | spinlock_t block_group_cache_lock; | |
a1897fdd | 1332 | u64 first_logical_byte; |
0f9dd46c JB |
1333 | struct rb_root block_group_cache_tree; |
1334 | ||
2bf64758 JB |
1335 | /* keep track of unallocated space */ |
1336 | spinlock_t free_chunk_lock; | |
1337 | u64 free_chunk_space; | |
1338 | ||
11833d66 YZ |
1339 | struct extent_io_tree freed_extents[2]; |
1340 | struct extent_io_tree *pinned_extents; | |
1a5bc167 | 1341 | |
0b86a832 CM |
1342 | /* logical->physical extent mapping */ |
1343 | struct btrfs_mapping_tree mapping_tree; | |
1344 | ||
16cdcec7 MX |
1345 | /* |
1346 | * block reservation for extent, checksum, root tree and | |
1347 | * delayed dir index item | |
1348 | */ | |
f0486c68 YZ |
1349 | struct btrfs_block_rsv global_block_rsv; |
1350 | /* block reservation for delay allocation */ | |
1351 | struct btrfs_block_rsv delalloc_block_rsv; | |
1352 | /* block reservation for metadata operations */ | |
1353 | struct btrfs_block_rsv trans_block_rsv; | |
1354 | /* block reservation for chunk tree */ | |
1355 | struct btrfs_block_rsv chunk_block_rsv; | |
6d668dda JB |
1356 | /* block reservation for delayed operations */ |
1357 | struct btrfs_block_rsv delayed_block_rsv; | |
f0486c68 YZ |
1358 | |
1359 | struct btrfs_block_rsv empty_block_rsv; | |
1360 | ||
293ffd5f | 1361 | u64 generation; |
15ee9bc7 | 1362 | u64 last_trans_committed; |
12fcfd22 CM |
1363 | |
1364 | /* | |
1365 | * this is updated to the current trans every time a full commit | |
1366 | * is required instead of the faster short fsync log commits | |
1367 | */ | |
1368 | u64 last_trans_log_full_commit; | |
25cd999e | 1369 | unsigned long mount_opt; |
261507a0 | 1370 | unsigned long compress_type:4; |
8b87dc17 | 1371 | int commit_interval; |
8c6a3ee6 MX |
1372 | /* |
1373 | * It is a suggestive number, the read side is safe even it gets a | |
1374 | * wrong number because we will write out the data into a regular | |
1375 | * extent. The write side(mount/remount) is under ->s_umount lock, | |
1376 | * so it is also safe. | |
1377 | */ | |
6f568d35 | 1378 | u64 max_inline; |
c018daec MX |
1379 | /* |
1380 | * Protected by ->chunk_mutex and sb->s_umount. | |
1381 | * | |
1382 | * The reason that we use two lock to protect it is because only | |
1383 | * remount and mount operations can change it and these two operations | |
1384 | * are under sb->s_umount, but the read side (chunk allocation) can not | |
1385 | * acquire sb->s_umount or the deadlock would happen. So we use two | |
1386 | * locks to protect it. On the write side, we must acquire two locks, | |
1387 | * and on the read side, we just need acquire one of them. | |
1388 | */ | |
8f662a76 | 1389 | u64 alloc_start; |
79154b1b | 1390 | struct btrfs_transaction *running_transaction; |
e6dcd2dc | 1391 | wait_queue_head_t transaction_throttle; |
f9295749 | 1392 | wait_queue_head_t transaction_wait; |
bb9c12c9 | 1393 | wait_queue_head_t transaction_blocked_wait; |
771ed689 | 1394 | wait_queue_head_t async_submit_wait; |
e02119d5 | 1395 | |
ceda0864 MX |
1396 | /* |
1397 | * Used to protect the incompat_flags, compat_flags, compat_ro_flags | |
1398 | * when they are updated. | |
1399 | * | |
1400 | * Because we do not clear the flags for ever, so we needn't use | |
1401 | * the lock on the read side. | |
1402 | * | |
1403 | * We also needn't use the lock when we mount the fs, because | |
1404 | * there is no other task which will update the flag. | |
1405 | */ | |
1406 | spinlock_t super_lock; | |
6c41761f DS |
1407 | struct btrfs_super_block *super_copy; |
1408 | struct btrfs_super_block *super_for_commit; | |
0b86a832 | 1409 | struct block_device *__bdev; |
e20d96d6 | 1410 | struct super_block *sb; |
d98237b3 | 1411 | struct inode *btree_inode; |
04160088 | 1412 | struct backing_dev_info bdi; |
e02119d5 | 1413 | struct mutex tree_log_mutex; |
a74a4b97 CM |
1414 | struct mutex transaction_kthread_mutex; |
1415 | struct mutex cleaner_mutex; | |
925baedd | 1416 | struct mutex chunk_mutex; |
7d9eb12c | 1417 | struct mutex volume_mutex; |
53b381b3 DW |
1418 | |
1419 | /* this is used during read/modify/write to make sure | |
1420 | * no two ios are trying to mod the same stripe at the same | |
1421 | * time | |
1422 | */ | |
1423 | struct btrfs_stripe_hash_table *stripe_hash_table; | |
1424 | ||
5a3f23d5 CM |
1425 | /* |
1426 | * this protects the ordered operations list only while we are | |
1427 | * processing all of the entries on it. This way we make | |
1428 | * sure the commit code doesn't find the list temporarily empty | |
1429 | * because another function happens to be doing non-waiting preflush | |
1430 | * before jumping into the main commit. | |
1431 | */ | |
1432 | struct mutex ordered_operations_mutex; | |
9ffba8cd JB |
1433 | |
1434 | /* | |
1435 | * Same as ordered_operations_mutex except this is for ordered extents | |
1436 | * and not the operations. | |
1437 | */ | |
1438 | struct mutex ordered_extent_flush_mutex; | |
1439 | ||
11833d66 | 1440 | struct rw_semaphore extent_commit_sem; |
5a3f23d5 | 1441 | |
c71bf099 | 1442 | struct rw_semaphore cleanup_work_sem; |
76dda93c | 1443 | |
c71bf099 | 1444 | struct rw_semaphore subvol_sem; |
76dda93c YZ |
1445 | struct srcu_struct subvol_srcu; |
1446 | ||
a4abeea4 | 1447 | spinlock_t trans_lock; |
7585717f CM |
1448 | /* |
1449 | * the reloc mutex goes with the trans lock, it is taken | |
1450 | * during commit to protect us from the relocation code | |
1451 | */ | |
1452 | struct mutex reloc_mutex; | |
1453 | ||
8fd17795 | 1454 | struct list_head trans_list; |
facda1e7 | 1455 | struct list_head dead_roots; |
11833d66 | 1456 | struct list_head caching_block_groups; |
e02119d5 | 1457 | |
24bbcf04 YZ |
1458 | spinlock_t delayed_iput_lock; |
1459 | struct list_head delayed_iputs; | |
1460 | ||
f29021b2 JS |
1461 | /* this protects tree_mod_seq_list */ |
1462 | spinlock_t tree_mod_seq_lock; | |
fc36ed7e | 1463 | atomic64_t tree_mod_seq; |
f29021b2 | 1464 | struct list_head tree_mod_seq_list; |
097b8a7c | 1465 | struct seq_list tree_mod_seq_elem; |
f29021b2 JS |
1466 | |
1467 | /* this protects tree_mod_log */ | |
1468 | rwlock_t tree_mod_log_lock; | |
1469 | struct rb_root tree_mod_log; | |
1470 | ||
cb03c743 | 1471 | atomic_t nr_async_submits; |
8c8bee1d | 1472 | atomic_t async_submit_draining; |
0986fe9e | 1473 | atomic_t nr_async_bios; |
771ed689 | 1474 | atomic_t async_delalloc_pages; |
a4abeea4 | 1475 | atomic_t open_ioctl_trans; |
ce9adaa5 | 1476 | |
3eaa2885 | 1477 | /* |
199c2a9c | 1478 | * this is used to protect the following list -- ordered_roots. |
3eaa2885 | 1479 | */ |
199c2a9c | 1480 | spinlock_t ordered_root_lock; |
5a3f23d5 CM |
1481 | |
1482 | /* | |
199c2a9c MX |
1483 | * all fs/file tree roots in which there are data=ordered extents |
1484 | * pending writeback are added into this list. | |
1485 | * | |
5a3f23d5 CM |
1486 | * these can span multiple transactions and basically include |
1487 | * every dirty data page that isn't from nodatacow | |
1488 | */ | |
199c2a9c | 1489 | struct list_head ordered_roots; |
5a3f23d5 | 1490 | |
eb73c1b7 MX |
1491 | spinlock_t delalloc_root_lock; |
1492 | /* all fs/file tree roots that have delalloc inodes. */ | |
1493 | struct list_head delalloc_roots; | |
3eaa2885 | 1494 | |
8b712842 CM |
1495 | /* |
1496 | * there is a pool of worker threads for checksumming during writes | |
1497 | * and a pool for checksumming after reads. This is because readers | |
1498 | * can run with FS locks held, and the writers may be waiting for | |
1499 | * those locks. We don't want ordering in the pending list to cause | |
1500 | * deadlocks, and so the two are serviced separately. | |
1cc127b5 CM |
1501 | * |
1502 | * A third pool does submit_bio to avoid deadlocking with the other | |
1503 | * two | |
8b712842 | 1504 | */ |
61d92c32 | 1505 | struct btrfs_workers generic_worker; |
8b712842 | 1506 | struct btrfs_workers workers; |
771ed689 | 1507 | struct btrfs_workers delalloc_workers; |
8ccf6f19 | 1508 | struct btrfs_workers flush_workers; |
8b712842 | 1509 | struct btrfs_workers endio_workers; |
d20f7043 | 1510 | struct btrfs_workers endio_meta_workers; |
53b381b3 DW |
1511 | struct btrfs_workers endio_raid56_workers; |
1512 | struct btrfs_workers rmw_workers; | |
cad321ad | 1513 | struct btrfs_workers endio_meta_write_workers; |
e6dcd2dc | 1514 | struct btrfs_workers endio_write_workers; |
0cb59c99 | 1515 | struct btrfs_workers endio_freespace_worker; |
1cc127b5 | 1516 | struct btrfs_workers submit_workers; |
bab39bf9 | 1517 | struct btrfs_workers caching_workers; |
90519d66 | 1518 | struct btrfs_workers readahead_workers; |
bab39bf9 | 1519 | |
247e743c CM |
1520 | /* |
1521 | * fixup workers take dirty pages that didn't properly go through | |
1522 | * the cow mechanism and make them safe to write. It happens | |
1523 | * for the sys_munmap function call path | |
1524 | */ | |
1525 | struct btrfs_workers fixup_workers; | |
16cdcec7 | 1526 | struct btrfs_workers delayed_workers; |
a74a4b97 CM |
1527 | struct task_struct *transaction_kthread; |
1528 | struct task_struct *cleaner_kthread; | |
4543df7e | 1529 | int thread_pool_size; |
8b712842 | 1530 | |
58176a96 | 1531 | struct kobject super_kobj; |
6ab0a202 | 1532 | struct kobject *space_info_kobj; |
29e5be24 | 1533 | struct kobject *device_dir_kobj; |
58176a96 | 1534 | struct completion kobj_unregister; |
e66f709b | 1535 | int do_barriers; |
facda1e7 | 1536 | int closing; |
e02119d5 | 1537 | int log_root_recovering; |
9f5fae2f | 1538 | |
324ae4df | 1539 | u64 total_pinned; |
b9473439 | 1540 | |
e2d84521 MX |
1541 | /* used to keep from writing metadata until there is a nice batch */ |
1542 | struct percpu_counter dirty_metadata_bytes; | |
963d678b | 1543 | struct percpu_counter delalloc_bytes; |
e2d84521 | 1544 | s32 dirty_metadata_batch; |
963d678b MX |
1545 | s32 delalloc_batch; |
1546 | ||
0b86a832 CM |
1547 | struct list_head dirty_cowonly_roots; |
1548 | ||
8a4b83cc | 1549 | struct btrfs_fs_devices *fs_devices; |
4184ea7f CM |
1550 | |
1551 | /* | |
1552 | * the space_info list is almost entirely read only. It only changes | |
1553 | * when we add a new raid type to the FS, and that happens | |
1554 | * very rarely. RCU is used to protect it. | |
1555 | */ | |
6324fbf3 | 1556 | struct list_head space_info; |
4184ea7f | 1557 | |
b4d7c3c9 LZ |
1558 | struct btrfs_space_info *data_sinfo; |
1559 | ||
5d4f98a2 YZ |
1560 | struct reloc_control *reloc_ctl; |
1561 | ||
fa9c0d79 CM |
1562 | /* data_alloc_cluster is only used in ssd mode */ |
1563 | struct btrfs_free_cluster data_alloc_cluster; | |
1564 | ||
1565 | /* all metadata allocations go through this cluster */ | |
1566 | struct btrfs_free_cluster meta_alloc_cluster; | |
d18a2c44 | 1567 | |
4cb5300b CM |
1568 | /* auto defrag inodes go here */ |
1569 | spinlock_t defrag_inodes_lock; | |
1570 | struct rb_root defrag_inodes; | |
1571 | atomic_t defrag_running; | |
1572 | ||
de98ced9 MX |
1573 | /* Used to protect avail_{data, metadata, system}_alloc_bits */ |
1574 | seqlock_t profiles_lock; | |
a46d11a8 ID |
1575 | /* |
1576 | * these three are in extended format (availability of single | |
1577 | * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other | |
1578 | * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) | |
1579 | */ | |
d18a2c44 CM |
1580 | u64 avail_data_alloc_bits; |
1581 | u64 avail_metadata_alloc_bits; | |
1582 | u64 avail_system_alloc_bits; | |
788f20eb | 1583 | |
c9e9f97b ID |
1584 | /* restriper state */ |
1585 | spinlock_t balance_lock; | |
1586 | struct mutex balance_mutex; | |
837d5b6e ID |
1587 | atomic_t balance_running; |
1588 | atomic_t balance_pause_req; | |
a7e99c69 | 1589 | atomic_t balance_cancel_req; |
c9e9f97b | 1590 | struct btrfs_balance_control *balance_ctl; |
837d5b6e | 1591 | wait_queue_head_t balance_wait_q; |
c9e9f97b | 1592 | |
97e728d4 JB |
1593 | unsigned data_chunk_allocations; |
1594 | unsigned metadata_ratio; | |
1595 | ||
788f20eb | 1596 | void *bdev_holder; |
acce952b | 1597 | |
a2de733c AJ |
1598 | /* private scrub information */ |
1599 | struct mutex scrub_lock; | |
1600 | atomic_t scrubs_running; | |
1601 | atomic_t scrub_pause_req; | |
1602 | atomic_t scrubs_paused; | |
1603 | atomic_t scrub_cancel_req; | |
1604 | wait_queue_head_t scrub_pause_wait; | |
a2de733c AJ |
1605 | int scrub_workers_refcnt; |
1606 | struct btrfs_workers scrub_workers; | |
ff023aac SB |
1607 | struct btrfs_workers scrub_wr_completion_workers; |
1608 | struct btrfs_workers scrub_nocow_workers; | |
a2de733c | 1609 | |
21adbd5c SB |
1610 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
1611 | u32 check_integrity_print_mask; | |
1612 | #endif | |
416ac51d AJ |
1613 | /* |
1614 | * quota information | |
1615 | */ | |
1616 | unsigned int quota_enabled:1; | |
1617 | ||
1618 | /* | |
1619 | * quota_enabled only changes state after a commit. This holds the | |
1620 | * next state. | |
1621 | */ | |
1622 | unsigned int pending_quota_state:1; | |
1623 | ||
1624 | /* is qgroup tracking in a consistent state? */ | |
1625 | u64 qgroup_flags; | |
1626 | ||
1627 | /* holds configuration and tracking. Protected by qgroup_lock */ | |
1628 | struct rb_root qgroup_tree; | |
1629 | spinlock_t qgroup_lock; | |
1630 | ||
1e8f9158 WS |
1631 | /* |
1632 | * used to avoid frequently calling ulist_alloc()/ulist_free() | |
1633 | * when doing qgroup accounting, it must be protected by qgroup_lock. | |
1634 | */ | |
1635 | struct ulist *qgroup_ulist; | |
1636 | ||
f2f6ed3d WS |
1637 | /* protect user change for quota operations */ |
1638 | struct mutex qgroup_ioctl_lock; | |
1639 | ||
416ac51d AJ |
1640 | /* list of dirty qgroups to be written at next commit */ |
1641 | struct list_head dirty_qgroups; | |
1642 | ||
1643 | /* used by btrfs_qgroup_record_ref for an efficient tree traversal */ | |
1644 | u64 qgroup_seq; | |
21adbd5c | 1645 | |
2f232036 JS |
1646 | /* qgroup rescan items */ |
1647 | struct mutex qgroup_rescan_lock; /* protects the progress item */ | |
1648 | struct btrfs_key qgroup_rescan_progress; | |
1649 | struct btrfs_workers qgroup_rescan_workers; | |
57254b6e | 1650 | struct completion qgroup_rescan_completion; |
b382a324 | 1651 | struct btrfs_work qgroup_rescan_work; |
2f232036 | 1652 | |
acce952b | 1653 | /* filesystem state */ |
87533c47 | 1654 | unsigned long fs_state; |
16cdcec7 MX |
1655 | |
1656 | struct btrfs_delayed_root *delayed_root; | |
af31f5e5 | 1657 | |
90519d66 AJ |
1658 | /* readahead tree */ |
1659 | spinlock_t reada_lock; | |
1660 | struct radix_tree_root reada_tree; | |
531f4b1a | 1661 | |
af31f5e5 CM |
1662 | /* next backup root to be overwritten */ |
1663 | int backup_root_index; | |
5af3e8cc SB |
1664 | |
1665 | int num_tolerated_disk_barrier_failures; | |
e922e087 SB |
1666 | |
1667 | /* device replace state */ | |
1668 | struct btrfs_dev_replace dev_replace; | |
5ac00add SB |
1669 | |
1670 | atomic_t mutually_exclusive_operation_running; | |
803b2f54 SB |
1671 | |
1672 | struct semaphore uuid_tree_rescan_sem; | |
70f80175 | 1673 | unsigned int update_uuid_tree_gen:1; |
324ae4df | 1674 | }; |
0b86a832 | 1675 | |
9f5fae2f CM |
1676 | /* |
1677 | * in ram representation of the tree. extent_root is used for all allocations | |
f2458e1d | 1678 | * and for the extent tree extent_root root. |
9f5fae2f CM |
1679 | */ |
1680 | struct btrfs_root { | |
5f39d397 | 1681 | struct extent_buffer *node; |
925baedd | 1682 | |
5f39d397 | 1683 | struct extent_buffer *commit_root; |
e02119d5 | 1684 | struct btrfs_root *log_root; |
1a40e23b | 1685 | struct btrfs_root *reloc_root; |
31153d81 | 1686 | |
62e2749e CM |
1687 | struct btrfs_root_item root_item; |
1688 | struct btrfs_key root_key; | |
9f5fae2f | 1689 | struct btrfs_fs_info *fs_info; |
d0c803c4 CM |
1690 | struct extent_io_tree dirty_log_pages; |
1691 | ||
58176a96 JB |
1692 | struct kobject root_kobj; |
1693 | struct completion kobj_unregister; | |
a2135011 | 1694 | struct mutex objectid_mutex; |
7237f183 | 1695 | |
f0486c68 YZ |
1696 | spinlock_t accounting_lock; |
1697 | struct btrfs_block_rsv *block_rsv; | |
1698 | ||
581bb050 LZ |
1699 | /* free ino cache stuff */ |
1700 | struct mutex fs_commit_mutex; | |
1701 | struct btrfs_free_space_ctl *free_ino_ctl; | |
1702 | enum btrfs_caching_type cached; | |
1703 | spinlock_t cache_lock; | |
1704 | wait_queue_head_t cache_wait; | |
1705 | struct btrfs_free_space_ctl *free_ino_pinned; | |
1706 | u64 cache_progress; | |
82d5902d | 1707 | struct inode *cache_inode; |
581bb050 | 1708 | |
e02119d5 | 1709 | struct mutex log_mutex; |
7237f183 YZ |
1710 | wait_queue_head_t log_writer_wait; |
1711 | wait_queue_head_t log_commit_wait[2]; | |
1712 | atomic_t log_writers; | |
1713 | atomic_t log_commit[2]; | |
2ecb7923 | 1714 | atomic_t log_batch; |
7237f183 | 1715 | unsigned long log_transid; |
257c62e1 | 1716 | unsigned long last_log_commit; |
ff782e0a JB |
1717 | pid_t log_start_pid; |
1718 | bool log_multiple_pids; | |
ea8c2819 | 1719 | |
0f7d52f4 CM |
1720 | u64 objectid; |
1721 | u64 last_trans; | |
5f39d397 CM |
1722 | |
1723 | /* data allocations are done in sectorsize units */ | |
1724 | u32 sectorsize; | |
1725 | ||
1726 | /* node allocations are done in nodesize units */ | |
1727 | u32 nodesize; | |
1728 | ||
1729 | /* leaf allocations are done in leafsize units */ | |
1730 | u32 leafsize; | |
1731 | ||
87ee04eb CM |
1732 | u32 stripesize; |
1733 | ||
9f5fae2f | 1734 | u32 type; |
13a8a7c8 YZ |
1735 | |
1736 | u64 highest_objectid; | |
7585717f CM |
1737 | |
1738 | /* btrfs_record_root_in_trans is a multi-step process, | |
1739 | * and it can race with the balancing code. But the | |
1740 | * race is very small, and only the first time the root | |
1741 | * is added to each transaction. So in_trans_setup | |
1742 | * is used to tell us when more checks are required | |
1743 | */ | |
1744 | unsigned long in_trans_setup; | |
9f3a7427 | 1745 | int ref_cows; |
0b86a832 | 1746 | int track_dirty; |
4df27c4d | 1747 | int in_radix; |
06ea65a3 JB |
1748 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
1749 | int dummy_root; | |
1750 | #endif | |
3f157a2f | 1751 | u64 defrag_trans_start; |
6702ed49 | 1752 | struct btrfs_key defrag_progress; |
0ef3e66b | 1753 | struct btrfs_key defrag_max; |
6702ed49 | 1754 | int defrag_running; |
58176a96 | 1755 | char *name; |
0b86a832 CM |
1756 | |
1757 | /* the dirty list is only used by non-reference counted roots */ | |
1758 | struct list_head dirty_list; | |
7b128766 | 1759 | |
5d4f98a2 YZ |
1760 | struct list_head root_list; |
1761 | ||
2ab28f32 JB |
1762 | spinlock_t log_extents_lock[2]; |
1763 | struct list_head logged_list[2]; | |
1764 | ||
d68fc57b | 1765 | spinlock_t orphan_lock; |
8a35d95f | 1766 | atomic_t orphan_inodes; |
d68fc57b YZ |
1767 | struct btrfs_block_rsv *orphan_block_rsv; |
1768 | int orphan_item_inserted; | |
1769 | int orphan_cleanup_state; | |
3394e160 | 1770 | |
5d4f98a2 YZ |
1771 | spinlock_t inode_lock; |
1772 | /* red-black tree that keeps track of in-memory inodes */ | |
1773 | struct rb_root inode_tree; | |
1774 | ||
16cdcec7 MX |
1775 | /* |
1776 | * radix tree that keeps track of delayed nodes of every inode, | |
1777 | * protected by inode_lock | |
1778 | */ | |
1779 | struct radix_tree_root delayed_nodes_tree; | |
3394e160 CM |
1780 | /* |
1781 | * right now this just gets used so that a root has its own devid | |
1782 | * for stat. It may be used for more later | |
1783 | */ | |
0ee5dc67 | 1784 | dev_t anon_dev; |
f1ebcc74 LB |
1785 | |
1786 | int force_cow; | |
8ea05e3a | 1787 | |
5f3ab90a | 1788 | spinlock_t root_item_lock; |
b0feb9d9 | 1789 | atomic_t refs; |
eb73c1b7 MX |
1790 | |
1791 | spinlock_t delalloc_lock; | |
1792 | /* | |
1793 | * all of the inodes that have delalloc bytes. It is possible for | |
1794 | * this list to be empty even when there is still dirty data=ordered | |
1795 | * extents waiting to finish IO. | |
1796 | */ | |
1797 | struct list_head delalloc_inodes; | |
1798 | struct list_head delalloc_root; | |
1799 | u64 nr_delalloc_inodes; | |
199c2a9c MX |
1800 | /* |
1801 | * this is used by the balancing code to wait for all the pending | |
1802 | * ordered extents | |
1803 | */ | |
1804 | spinlock_t ordered_extent_lock; | |
1805 | ||
1806 | /* | |
1807 | * all of the data=ordered extents pending writeback | |
1808 | * these can span multiple transactions and basically include | |
1809 | * every dirty data page that isn't from nodatacow | |
1810 | */ | |
1811 | struct list_head ordered_extents; | |
1812 | struct list_head ordered_root; | |
1813 | u64 nr_ordered_extents; | |
62e2749e CM |
1814 | }; |
1815 | ||
4cb5300b CM |
1816 | struct btrfs_ioctl_defrag_range_args { |
1817 | /* start of the defrag operation */ | |
1818 | __u64 start; | |
1819 | ||
1820 | /* number of bytes to defrag, use (u64)-1 to say all */ | |
1821 | __u64 len; | |
1822 | ||
1823 | /* | |
1824 | * flags for the operation, which can include turning | |
1825 | * on compression for this one defrag | |
1826 | */ | |
1827 | __u64 flags; | |
1828 | ||
1829 | /* | |
1830 | * any extent bigger than this will be considered | |
1831 | * already defragged. Use 0 to take the kernel default | |
1832 | * Use 1 to say every single extent must be rewritten | |
1833 | */ | |
1834 | __u32 extent_thresh; | |
1835 | ||
1836 | /* | |
1837 | * which compression method to use if turning on compression | |
1838 | * for this defrag operation. If unspecified, zlib will | |
1839 | * be used | |
1840 | */ | |
1841 | __u32 compress_type; | |
1842 | ||
1843 | /* spare for later */ | |
1844 | __u32 unused[4]; | |
1845 | }; | |
1846 | ||
1847 | ||
1e1d2701 CM |
1848 | /* |
1849 | * inode items have the data typically returned from stat and store other | |
1850 | * info about object characteristics. There is one for every file and dir in | |
1851 | * the FS | |
1852 | */ | |
9078a3e1 | 1853 | #define BTRFS_INODE_ITEM_KEY 1 |
0660b5af | 1854 | #define BTRFS_INODE_REF_KEY 12 |
f186373f | 1855 | #define BTRFS_INODE_EXTREF_KEY 13 |
0660b5af CM |
1856 | #define BTRFS_XATTR_ITEM_KEY 24 |
1857 | #define BTRFS_ORPHAN_ITEM_KEY 48 | |
9078a3e1 | 1858 | /* reserve 2-15 close to the inode for later flexibility */ |
1e1d2701 CM |
1859 | |
1860 | /* | |
1861 | * dir items are the name -> inode pointers in a directory. There is one | |
1862 | * for every name in a directory. | |
1863 | */ | |
0660b5af CM |
1864 | #define BTRFS_DIR_LOG_ITEM_KEY 60 |
1865 | #define BTRFS_DIR_LOG_INDEX_KEY 72 | |
1866 | #define BTRFS_DIR_ITEM_KEY 84 | |
1867 | #define BTRFS_DIR_INDEX_KEY 96 | |
1e1d2701 | 1868 | /* |
9078a3e1 | 1869 | * extent data is for file data |
1e1d2701 | 1870 | */ |
0660b5af | 1871 | #define BTRFS_EXTENT_DATA_KEY 108 |
d20f7043 | 1872 | |
f254e52c | 1873 | /* |
d20f7043 CM |
1874 | * extent csums are stored in a separate tree and hold csums for |
1875 | * an entire extent on disk. | |
f254e52c | 1876 | */ |
d20f7043 | 1877 | #define BTRFS_EXTENT_CSUM_KEY 128 |
f254e52c | 1878 | |
1e1d2701 | 1879 | /* |
d4a78947 | 1880 | * root items point to tree roots. They are typically in the root |
1e1d2701 CM |
1881 | * tree used by the super block to find all the other trees |
1882 | */ | |
0660b5af CM |
1883 | #define BTRFS_ROOT_ITEM_KEY 132 |
1884 | ||
1885 | /* | |
1886 | * root backrefs tie subvols and snapshots to the directory entries that | |
1887 | * reference them | |
1888 | */ | |
1889 | #define BTRFS_ROOT_BACKREF_KEY 144 | |
1890 | ||
1891 | /* | |
1892 | * root refs make a fast index for listing all of the snapshots and | |
1893 | * subvolumes referenced by a given root. They point directly to the | |
1894 | * directory item in the root that references the subvol | |
1895 | */ | |
1896 | #define BTRFS_ROOT_REF_KEY 156 | |
1897 | ||
1e1d2701 CM |
1898 | /* |
1899 | * extent items are in the extent map tree. These record which blocks | |
1900 | * are used, and how many references there are to each block | |
1901 | */ | |
0660b5af | 1902 | #define BTRFS_EXTENT_ITEM_KEY 168 |
5d4f98a2 | 1903 | |
3173a18f JB |
1904 | /* |
1905 | * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know | |
1906 | * the length, so we save the level in key->offset instead of the length. | |
1907 | */ | |
1908 | #define BTRFS_METADATA_ITEM_KEY 169 | |
1909 | ||
5d4f98a2 YZ |
1910 | #define BTRFS_TREE_BLOCK_REF_KEY 176 |
1911 | ||
1912 | #define BTRFS_EXTENT_DATA_REF_KEY 178 | |
1913 | ||
1914 | #define BTRFS_EXTENT_REF_V0_KEY 180 | |
1915 | ||
1916 | #define BTRFS_SHARED_BLOCK_REF_KEY 182 | |
1917 | ||
1918 | #define BTRFS_SHARED_DATA_REF_KEY 184 | |
9078a3e1 CM |
1919 | |
1920 | /* | |
1921 | * block groups give us hints into the extent allocation trees. Which | |
1922 | * blocks are free etc etc | |
1923 | */ | |
0660b5af | 1924 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 192 |
9f5fae2f | 1925 | |
0660b5af CM |
1926 | #define BTRFS_DEV_EXTENT_KEY 204 |
1927 | #define BTRFS_DEV_ITEM_KEY 216 | |
1928 | #define BTRFS_CHUNK_ITEM_KEY 228 | |
0b86a832 | 1929 | |
630dc772 AJ |
1930 | /* |
1931 | * Records the overall state of the qgroups. | |
1932 | * There's only one instance of this key present, | |
1933 | * (0, BTRFS_QGROUP_STATUS_KEY, 0) | |
1934 | */ | |
1935 | #define BTRFS_QGROUP_STATUS_KEY 240 | |
1936 | /* | |
1937 | * Records the currently used space of the qgroup. | |
1938 | * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid). | |
1939 | */ | |
1940 | #define BTRFS_QGROUP_INFO_KEY 242 | |
1941 | /* | |
1942 | * Contains the user configured limits for the qgroup. | |
1943 | * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid). | |
1944 | */ | |
1945 | #define BTRFS_QGROUP_LIMIT_KEY 244 | |
1946 | /* | |
1947 | * Records the child-parent relationship of qgroups. For | |
1948 | * each relation, 2 keys are present: | |
1949 | * (childid, BTRFS_QGROUP_RELATION_KEY, parentid) | |
1950 | * (parentid, BTRFS_QGROUP_RELATION_KEY, childid) | |
1951 | */ | |
1952 | #define BTRFS_QGROUP_RELATION_KEY 246 | |
1953 | ||
0940ebf6 ID |
1954 | #define BTRFS_BALANCE_ITEM_KEY 248 |
1955 | ||
733f4fbb SB |
1956 | /* |
1957 | * Persistantly stores the io stats in the device tree. | |
1958 | * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid). | |
1959 | */ | |
1960 | #define BTRFS_DEV_STATS_KEY 249 | |
1961 | ||
a2bff640 SB |
1962 | /* |
1963 | * Persistantly stores the device replace state in the device tree. | |
1964 | * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0). | |
1965 | */ | |
1966 | #define BTRFS_DEV_REPLACE_KEY 250 | |
1967 | ||
07b30a49 SB |
1968 | /* |
1969 | * Stores items that allow to quickly map UUIDs to something else. | |
1970 | * These items are part of the filesystem UUID tree. | |
1971 | * The key is built like this: | |
1972 | * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits). | |
1973 | */ | |
1974 | #if BTRFS_UUID_SIZE != 16 | |
1975 | #error "UUID items require BTRFS_UUID_SIZE == 16!" | |
1976 | #endif | |
1977 | #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */ | |
1978 | #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to | |
1979 | * received subvols */ | |
1980 | ||
1e1d2701 CM |
1981 | /* |
1982 | * string items are for debugging. They just store a short string of | |
1983 | * data in the FS | |
1984 | */ | |
9078a3e1 CM |
1985 | #define BTRFS_STRING_ITEM_KEY 253 |
1986 | ||
0942caa3 DS |
1987 | /* |
1988 | * Flags for mount options. | |
1989 | * | |
1990 | * Note: don't forget to add new options to btrfs_show_options() | |
1991 | */ | |
21ad10cf CM |
1992 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
1993 | #define BTRFS_MOUNT_NODATACOW (1 << 1) | |
1994 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) | |
e18e4809 | 1995 | #define BTRFS_MOUNT_SSD (1 << 3) |
dfe25020 | 1996 | #define BTRFS_MOUNT_DEGRADED (1 << 4) |
c8b97818 | 1997 | #define BTRFS_MOUNT_COMPRESS (1 << 5) |
3a5e1404 | 1998 | #define BTRFS_MOUNT_NOTREELOG (1 << 6) |
dccae999 | 1999 | #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) |
451d7585 | 2000 | #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) |
c289811c | 2001 | #define BTRFS_MOUNT_NOSSD (1 << 9) |
e244a0ae | 2002 | #define BTRFS_MOUNT_DISCARD (1 << 10) |
a555f810 | 2003 | #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) |
0af3d00b | 2004 | #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) |
88c2ba3b | 2005 | #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) |
4260f7c7 | 2006 | #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) |
91435650 | 2007 | #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) |
4cb5300b | 2008 | #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) |
4b9465cb | 2009 | #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) |
af31f5e5 | 2010 | #define BTRFS_MOUNT_RECOVERY (1 << 18) |
9555c6c1 | 2011 | #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) |
c126dea7 CM |
2012 | #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) |
2013 | #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) | |
8c342930 | 2014 | #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) |
f420ee1e | 2015 | #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) |
b6cda9bc | 2016 | |
8b87dc17 DS |
2017 | #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) |
2018 | ||
b6cda9bc CM |
2019 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) |
2020 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) | |
dc81cdc5 | 2021 | #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) |
b6cda9bc CM |
2022 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ |
2023 | BTRFS_MOUNT_##opt) | |
b98b6767 Y |
2024 | /* |
2025 | * Inode flags | |
2026 | */ | |
fdebe2bd Y |
2027 | #define BTRFS_INODE_NODATASUM (1 << 0) |
2028 | #define BTRFS_INODE_NODATACOW (1 << 1) | |
2029 | #define BTRFS_INODE_READONLY (1 << 2) | |
c8b97818 | 2030 | #define BTRFS_INODE_NOCOMPRESS (1 << 3) |
d899e052 | 2031 | #define BTRFS_INODE_PREALLOC (1 << 4) |
6cbff00f CH |
2032 | #define BTRFS_INODE_SYNC (1 << 5) |
2033 | #define BTRFS_INODE_IMMUTABLE (1 << 6) | |
2034 | #define BTRFS_INODE_APPEND (1 << 7) | |
2035 | #define BTRFS_INODE_NODUMP (1 << 8) | |
2036 | #define BTRFS_INODE_NOATIME (1 << 9) | |
2037 | #define BTRFS_INODE_DIRSYNC (1 << 10) | |
75e7cb7f | 2038 | #define BTRFS_INODE_COMPRESS (1 << 11) |
6cbff00f | 2039 | |
08fe4db1 LZ |
2040 | #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) |
2041 | ||
cfed81a0 CM |
2042 | struct btrfs_map_token { |
2043 | struct extent_buffer *eb; | |
2044 | char *kaddr; | |
2045 | unsigned long offset; | |
2046 | }; | |
2047 | ||
2048 | static inline void btrfs_init_map_token (struct btrfs_map_token *token) | |
2049 | { | |
ad914559 | 2050 | token->kaddr = NULL; |
cfed81a0 CM |
2051 | } |
2052 | ||
5f39d397 CM |
2053 | /* some macros to generate set/get funcs for the struct fields. This |
2054 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | |
2055 | * one for u8: | |
2056 | */ | |
2057 | #define le8_to_cpu(v) (v) | |
2058 | #define cpu_to_le8(v) (v) | |
2059 | #define __le8 u8 | |
2060 | ||
2061 | #define read_eb_member(eb, ptr, type, member, result) ( \ | |
2062 | read_extent_buffer(eb, (char *)(result), \ | |
2063 | ((unsigned long)(ptr)) + \ | |
2064 | offsetof(type, member), \ | |
2065 | sizeof(((type *)0)->member))) | |
2066 | ||
2067 | #define write_eb_member(eb, ptr, type, member, result) ( \ | |
2068 | write_extent_buffer(eb, (char *)(result), \ | |
2069 | ((unsigned long)(ptr)) + \ | |
2070 | offsetof(type, member), \ | |
2071 | sizeof(((type *)0)->member))) | |
2072 | ||
18077bb4 LZ |
2073 | #define DECLARE_BTRFS_SETGET_BITS(bits) \ |
2074 | u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \ | |
2075 | unsigned long off, \ | |
2076 | struct btrfs_map_token *token); \ | |
2077 | void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \ | |
2078 | unsigned long off, u##bits val, \ | |
2079 | struct btrfs_map_token *token); \ | |
2080 | static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \ | |
2081 | unsigned long off) \ | |
2082 | { \ | |
2083 | return btrfs_get_token_##bits(eb, ptr, off, NULL); \ | |
2084 | } \ | |
2085 | static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \ | |
2086 | unsigned long off, u##bits val) \ | |
2087 | { \ | |
2088 | btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ | |
2089 | } | |
2090 | ||
2091 | DECLARE_BTRFS_SETGET_BITS(8) | |
2092 | DECLARE_BTRFS_SETGET_BITS(16) | |
2093 | DECLARE_BTRFS_SETGET_BITS(32) | |
2094 | DECLARE_BTRFS_SETGET_BITS(64) | |
2095 | ||
5f39d397 | 2096 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
18077bb4 LZ |
2097 | static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \ |
2098 | { \ | |
2099 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ | |
2100 | return btrfs_get_##bits(eb, s, offsetof(type, member)); \ | |
2101 | } \ | |
2102 | static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ | |
2103 | u##bits val) \ | |
2104 | { \ | |
2105 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ | |
2106 | btrfs_set_##bits(eb, s, offsetof(type, member), val); \ | |
2107 | } \ | |
2108 | static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \ | |
2109 | struct btrfs_map_token *token) \ | |
2110 | { \ | |
2111 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ | |
2112 | return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ | |
2113 | } \ | |
2114 | static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ | |
2115 | type *s, u##bits val, \ | |
2116 | struct btrfs_map_token *token) \ | |
2117 | { \ | |
2118 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ | |
2119 | btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ | |
2120 | } | |
5f39d397 CM |
2121 | |
2122 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | |
2123 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | |
2124 | { \ | |
727011e0 | 2125 | type *p = page_address(eb->pages[0]); \ |
df68b8a7 | 2126 | u##bits res = le##bits##_to_cpu(p->member); \ |
810191ff | 2127 | return res; \ |
5f39d397 CM |
2128 | } \ |
2129 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
2130 | u##bits val) \ | |
2131 | { \ | |
727011e0 | 2132 | type *p = page_address(eb->pages[0]); \ |
df68b8a7 | 2133 | p->member = cpu_to_le##bits(val); \ |
5f39d397 | 2134 | } |
9078a3e1 | 2135 | |
5f39d397 CM |
2136 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
2137 | static inline u##bits btrfs_##name(type *s) \ | |
2138 | { \ | |
2139 | return le##bits##_to_cpu(s->member); \ | |
2140 | } \ | |
2141 | static inline void btrfs_set_##name(type *s, u##bits val) \ | |
2142 | { \ | |
2143 | s->member = cpu_to_le##bits(val); \ | |
1e1d2701 CM |
2144 | } |
2145 | ||
0b86a832 CM |
2146 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
2147 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); | |
2148 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); | |
2149 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); | |
2150 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); | |
c3027eb5 CM |
2151 | BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, |
2152 | start_offset, 64); | |
0b86a832 CM |
2153 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); |
2154 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
2155 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); |
2156 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); | |
2157 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); | |
2b82032c | 2158 | BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); |
0b86a832 | 2159 | |
8a4b83cc CM |
2160 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
2161 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, | |
2162 | total_bytes, 64); | |
2163 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, | |
2164 | bytes_used, 64); | |
2165 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, | |
2166 | io_align, 32); | |
2167 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, | |
2168 | io_width, 32); | |
2169 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, | |
2170 | sector_size, 32); | |
2171 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
2172 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, |
2173 | dev_group, 32); | |
2174 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, | |
2175 | seek_speed, 8); | |
2176 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, | |
2177 | bandwidth, 8); | |
2b82032c YZ |
2178 | BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, |
2179 | generation, 64); | |
8a4b83cc | 2180 | |
410ba3a2 | 2181 | static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) |
0b86a832 | 2182 | { |
410ba3a2 | 2183 | return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); |
0b86a832 CM |
2184 | } |
2185 | ||
1473b24e | 2186 | static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) |
2b82032c | 2187 | { |
1473b24e | 2188 | return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); |
2b82032c YZ |
2189 | } |
2190 | ||
e17cade2 | 2191 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
0b86a832 CM |
2192 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
2193 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); | |
2194 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); | |
2195 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); | |
2196 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); | |
2197 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); | |
2198 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); | |
321aecc6 | 2199 | BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); |
0b86a832 CM |
2200 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
2201 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); | |
2202 | ||
e17cade2 CM |
2203 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
2204 | { | |
2205 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); | |
2206 | } | |
2207 | ||
2208 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); | |
0b86a832 CM |
2209 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
2210 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, | |
2211 | stripe_len, 64); | |
2212 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, | |
2213 | io_align, 32); | |
2214 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, | |
2215 | io_width, 32); | |
2216 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, | |
2217 | sector_size, 32); | |
2218 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); | |
2219 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, | |
2220 | num_stripes, 16); | |
321aecc6 CM |
2221 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, |
2222 | sub_stripes, 16); | |
0b86a832 CM |
2223 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
2224 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); | |
2225 | ||
2226 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, | |
2227 | int nr) | |
2228 | { | |
2229 | unsigned long offset = (unsigned long)c; | |
2230 | offset += offsetof(struct btrfs_chunk, stripe); | |
2231 | offset += nr * sizeof(struct btrfs_stripe); | |
2232 | return (struct btrfs_stripe *)offset; | |
2233 | } | |
2234 | ||
a443755f CM |
2235 | static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) |
2236 | { | |
2237 | return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); | |
2238 | } | |
2239 | ||
0b86a832 CM |
2240 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
2241 | struct btrfs_chunk *c, int nr) | |
2242 | { | |
2243 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); | |
2244 | } | |
2245 | ||
0b86a832 CM |
2246 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, |
2247 | struct btrfs_chunk *c, int nr) | |
2248 | { | |
2249 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); | |
2250 | } | |
2251 | ||
5f39d397 CM |
2252 | /* struct btrfs_block_group_item */ |
2253 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | |
2254 | used, 64); | |
2255 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | |
2256 | used, 64); | |
0b86a832 CM |
2257 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
2258 | struct btrfs_block_group_item, chunk_objectid, 64); | |
e17cade2 CM |
2259 | |
2260 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, | |
0b86a832 CM |
2261 | struct btrfs_block_group_item, chunk_objectid, 64); |
2262 | BTRFS_SETGET_FUNCS(disk_block_group_flags, | |
2263 | struct btrfs_block_group_item, flags, 64); | |
2264 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, | |
2265 | struct btrfs_block_group_item, flags, 64); | |
1e1d2701 | 2266 | |
3954401f CM |
2267 | /* struct btrfs_inode_ref */ |
2268 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); | |
aec7477b | 2269 | BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); |
3954401f | 2270 | |
f186373f MF |
2271 | /* struct btrfs_inode_extref */ |
2272 | BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, | |
2273 | parent_objectid, 64); | |
2274 | BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, | |
2275 | name_len, 16); | |
2276 | BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); | |
2277 | ||
5f39d397 CM |
2278 | /* struct btrfs_inode_item */ |
2279 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | |
c3027eb5 | 2280 | BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); |
e02119d5 | 2281 | BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); |
5f39d397 | 2282 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); |
a76a3cd4 | 2283 | BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); |
5f39d397 CM |
2284 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); |
2285 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | |
2286 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | |
2287 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | |
2288 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | |
0b86a832 | 2289 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
f2b636e8 | 2290 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); |
3cae210f QW |
2291 | BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, |
2292 | generation, 64); | |
2293 | BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, | |
2294 | sequence, 64); | |
2295 | BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, | |
2296 | transid, 64); | |
2297 | BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); | |
2298 | BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, | |
2299 | nbytes, 64); | |
2300 | BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, | |
2301 | block_group, 64); | |
2302 | BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); | |
2303 | BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); | |
2304 | BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); | |
2305 | BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); | |
2306 | BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); | |
2307 | BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); | |
1e1d2701 | 2308 | |
0b86a832 | 2309 | static inline struct btrfs_timespec * |
5f39d397 | 2310 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 2311 | { |
5f39d397 CM |
2312 | unsigned long ptr = (unsigned long)inode_item; |
2313 | ptr += offsetof(struct btrfs_inode_item, atime); | |
0b86a832 | 2314 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
2315 | } |
2316 | ||
0b86a832 | 2317 | static inline struct btrfs_timespec * |
5f39d397 | 2318 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 2319 | { |
5f39d397 CM |
2320 | unsigned long ptr = (unsigned long)inode_item; |
2321 | ptr += offsetof(struct btrfs_inode_item, mtime); | |
0b86a832 | 2322 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
2323 | } |
2324 | ||
0b86a832 | 2325 | static inline struct btrfs_timespec * |
5f39d397 | 2326 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 2327 | { |
5f39d397 CM |
2328 | unsigned long ptr = (unsigned long)inode_item; |
2329 | ptr += offsetof(struct btrfs_inode_item, ctime); | |
0b86a832 | 2330 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
2331 | } |
2332 | ||
0b86a832 CM |
2333 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
2334 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); | |
3cae210f QW |
2335 | BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); |
2336 | BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); | |
e20d96d6 | 2337 | |
0b86a832 | 2338 | /* struct btrfs_dev_extent */ |
e17cade2 CM |
2339 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
2340 | chunk_tree, 64); | |
2341 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, | |
2342 | chunk_objectid, 64); | |
2343 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, | |
2344 | chunk_offset, 64); | |
0b86a832 CM |
2345 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
2346 | ||
231e88f4 | 2347 | static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
e17cade2 CM |
2348 | { |
2349 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); | |
231e88f4 | 2350 | return (unsigned long)dev + ptr; |
e17cade2 CM |
2351 | } |
2352 | ||
5d4f98a2 YZ |
2353 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); |
2354 | BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, | |
2355 | generation, 64); | |
2356 | BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); | |
74493f7a | 2357 | |
5d4f98a2 YZ |
2358 | BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); |
2359 | ||
2360 | ||
2361 | BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); | |
2362 | ||
2363 | static inline void btrfs_tree_block_key(struct extent_buffer *eb, | |
2364 | struct btrfs_tree_block_info *item, | |
2365 | struct btrfs_disk_key *key) | |
2366 | { | |
2367 | read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
2368 | } | |
2369 | ||
2370 | static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, | |
2371 | struct btrfs_tree_block_info *item, | |
2372 | struct btrfs_disk_key *key) | |
2373 | { | |
2374 | write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
2375 | } | |
e20d96d6 | 2376 | |
5d4f98a2 YZ |
2377 | BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, |
2378 | root, 64); | |
2379 | BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, | |
2380 | objectid, 64); | |
2381 | BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, | |
2382 | offset, 64); | |
2383 | BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, | |
2384 | count, 32); | |
2385 | ||
2386 | BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, | |
2387 | count, 32); | |
2388 | ||
2389 | BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, | |
2390 | type, 8); | |
2391 | BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, | |
2392 | offset, 64); | |
2393 | ||
2394 | static inline u32 btrfs_extent_inline_ref_size(int type) | |
2395 | { | |
2396 | if (type == BTRFS_TREE_BLOCK_REF_KEY || | |
2397 | type == BTRFS_SHARED_BLOCK_REF_KEY) | |
2398 | return sizeof(struct btrfs_extent_inline_ref); | |
2399 | if (type == BTRFS_SHARED_DATA_REF_KEY) | |
2400 | return sizeof(struct btrfs_shared_data_ref) + | |
2401 | sizeof(struct btrfs_extent_inline_ref); | |
2402 | if (type == BTRFS_EXTENT_DATA_REF_KEY) | |
2403 | return sizeof(struct btrfs_extent_data_ref) + | |
2404 | offsetof(struct btrfs_extent_inline_ref, offset); | |
2405 | BUG(); | |
2406 | return 0; | |
2407 | } | |
2408 | ||
2409 | BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); | |
2410 | BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, | |
2411 | generation, 64); | |
2412 | BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); | |
2413 | BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); | |
e20d96d6 | 2414 | |
5f39d397 CM |
2415 | /* struct btrfs_node */ |
2416 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | |
74493f7a | 2417 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
3cae210f QW |
2418 | BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, |
2419 | blockptr, 64); | |
2420 | BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, | |
2421 | generation, 64); | |
e20d96d6 | 2422 | |
5f39d397 | 2423 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
cf27e1ee | 2424 | { |
5f39d397 CM |
2425 | unsigned long ptr; |
2426 | ptr = offsetof(struct btrfs_node, ptrs) + | |
2427 | sizeof(struct btrfs_key_ptr) * nr; | |
2428 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | |
cf27e1ee CM |
2429 | } |
2430 | ||
5f39d397 CM |
2431 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
2432 | int nr, u64 val) | |
cf27e1ee | 2433 | { |
5f39d397 CM |
2434 | unsigned long ptr; |
2435 | ptr = offsetof(struct btrfs_node, ptrs) + | |
2436 | sizeof(struct btrfs_key_ptr) * nr; | |
2437 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | |
cf27e1ee CM |
2438 | } |
2439 | ||
74493f7a CM |
2440 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
2441 | { | |
2442 | unsigned long ptr; | |
2443 | ptr = offsetof(struct btrfs_node, ptrs) + | |
2444 | sizeof(struct btrfs_key_ptr) * nr; | |
2445 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); | |
2446 | } | |
2447 | ||
2448 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, | |
2449 | int nr, u64 val) | |
2450 | { | |
2451 | unsigned long ptr; | |
2452 | ptr = offsetof(struct btrfs_node, ptrs) + | |
2453 | sizeof(struct btrfs_key_ptr) * nr; | |
2454 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); | |
2455 | } | |
2456 | ||
810191ff | 2457 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
4d775673 | 2458 | { |
5f39d397 CM |
2459 | return offsetof(struct btrfs_node, ptrs) + |
2460 | sizeof(struct btrfs_key_ptr) * nr; | |
4d775673 CM |
2461 | } |
2462 | ||
e644d021 CM |
2463 | void btrfs_node_key(struct extent_buffer *eb, |
2464 | struct btrfs_disk_key *disk_key, int nr); | |
2465 | ||
5f39d397 CM |
2466 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
2467 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f8a0c | 2468 | { |
5f39d397 CM |
2469 | unsigned long ptr; |
2470 | ptr = btrfs_node_key_ptr_offset(nr); | |
2471 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
2472 | struct btrfs_key_ptr, key, disk_key); | |
1d4f8a0c CM |
2473 | } |
2474 | ||
5f39d397 CM |
2475 | /* struct btrfs_item */ |
2476 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | |
2477 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | |
3cae210f QW |
2478 | BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); |
2479 | BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); | |
4d775673 | 2480 | |
5f39d397 | 2481 | static inline unsigned long btrfs_item_nr_offset(int nr) |
1d4f8a0c | 2482 | { |
5f39d397 CM |
2483 | return offsetof(struct btrfs_leaf, items) + |
2484 | sizeof(struct btrfs_item) * nr; | |
1d4f8a0c CM |
2485 | } |
2486 | ||
dd3cc16b | 2487 | static inline struct btrfs_item *btrfs_item_nr(int nr) |
0783fcfc | 2488 | { |
5f39d397 | 2489 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
0783fcfc CM |
2490 | } |
2491 | ||
5f39d397 CM |
2492 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
2493 | struct btrfs_item *item) | |
0783fcfc | 2494 | { |
5f39d397 | 2495 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
0783fcfc CM |
2496 | } |
2497 | ||
5f39d397 | 2498 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 2499 | { |
dd3cc16b | 2500 | return btrfs_item_end(eb, btrfs_item_nr(nr)); |
0783fcfc CM |
2501 | } |
2502 | ||
5f39d397 | 2503 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 2504 | { |
dd3cc16b | 2505 | return btrfs_item_offset(eb, btrfs_item_nr(nr)); |
0783fcfc CM |
2506 | } |
2507 | ||
5f39d397 | 2508 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 2509 | { |
dd3cc16b | 2510 | return btrfs_item_size(eb, btrfs_item_nr(nr)); |
0783fcfc CM |
2511 | } |
2512 | ||
5f39d397 CM |
2513 | static inline void btrfs_item_key(struct extent_buffer *eb, |
2514 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 2515 | { |
dd3cc16b | 2516 | struct btrfs_item *item = btrfs_item_nr(nr); |
5f39d397 | 2517 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); |
1d4f6404 CM |
2518 | } |
2519 | ||
5f39d397 CM |
2520 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
2521 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 2522 | { |
dd3cc16b | 2523 | struct btrfs_item *item = btrfs_item_nr(nr); |
5f39d397 | 2524 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); |
1d4f6404 CM |
2525 | } |
2526 | ||
e02119d5 CM |
2527 | BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); |
2528 | ||
0660b5af CM |
2529 | /* |
2530 | * struct btrfs_root_ref | |
2531 | */ | |
2532 | BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); | |
2533 | BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); | |
2534 | BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); | |
2535 | ||
5f39d397 | 2536 | /* struct btrfs_dir_item */ |
5103e947 | 2537 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
5f39d397 CM |
2538 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
2539 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | |
e02119d5 | 2540 | BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); |
3cae210f QW |
2541 | BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); |
2542 | BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, | |
2543 | data_len, 16); | |
2544 | BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, | |
2545 | name_len, 16); | |
2546 | BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, | |
2547 | transid, 64); | |
1d4f6404 | 2548 | |
5f39d397 CM |
2549 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
2550 | struct btrfs_dir_item *item, | |
2551 | struct btrfs_disk_key *key) | |
1d4f6404 | 2552 | { |
5f39d397 | 2553 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
1d4f6404 CM |
2554 | } |
2555 | ||
5f39d397 CM |
2556 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
2557 | struct btrfs_dir_item *item, | |
2558 | struct btrfs_disk_key *key) | |
a8a2ee0c | 2559 | { |
5f39d397 | 2560 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
a8a2ee0c CM |
2561 | } |
2562 | ||
0af3d00b JB |
2563 | BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, |
2564 | num_entries, 64); | |
2565 | BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, | |
2566 | num_bitmaps, 64); | |
2567 | BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, | |
2568 | generation, 64); | |
2569 | ||
2570 | static inline void btrfs_free_space_key(struct extent_buffer *eb, | |
2571 | struct btrfs_free_space_header *h, | |
2572 | struct btrfs_disk_key *key) | |
2573 | { | |
2574 | read_eb_member(eb, h, struct btrfs_free_space_header, location, key); | |
2575 | } | |
2576 | ||
2577 | static inline void btrfs_set_free_space_key(struct extent_buffer *eb, | |
2578 | struct btrfs_free_space_header *h, | |
2579 | struct btrfs_disk_key *key) | |
2580 | { | |
2581 | write_eb_member(eb, h, struct btrfs_free_space_header, location, key); | |
2582 | } | |
2583 | ||
5f39d397 CM |
2584 | /* struct btrfs_disk_key */ |
2585 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | |
2586 | objectid, 64); | |
2587 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | |
2588 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | |
1d4f6404 | 2589 | |
e2fa7227 CM |
2590 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
2591 | struct btrfs_disk_key *disk) | |
2592 | { | |
2593 | cpu->offset = le64_to_cpu(disk->offset); | |
5f39d397 | 2594 | cpu->type = disk->type; |
e2fa7227 CM |
2595 | cpu->objectid = le64_to_cpu(disk->objectid); |
2596 | } | |
2597 | ||
2598 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
2599 | struct btrfs_key *cpu) | |
2600 | { | |
2601 | disk->offset = cpu_to_le64(cpu->offset); | |
5f39d397 | 2602 | disk->type = cpu->type; |
e2fa7227 CM |
2603 | disk->objectid = cpu_to_le64(cpu->objectid); |
2604 | } | |
2605 | ||
5f39d397 CM |
2606 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
2607 | struct btrfs_key *key, int nr) | |
7f5c1516 | 2608 | { |
5f39d397 CM |
2609 | struct btrfs_disk_key disk_key; |
2610 | btrfs_node_key(eb, &disk_key, nr); | |
2611 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
2612 | } |
2613 | ||
5f39d397 CM |
2614 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
2615 | struct btrfs_key *key, int nr) | |
7f5c1516 | 2616 | { |
5f39d397 CM |
2617 | struct btrfs_disk_key disk_key; |
2618 | btrfs_item_key(eb, &disk_key, nr); | |
2619 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
2620 | } |
2621 | ||
5f39d397 CM |
2622 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
2623 | struct btrfs_dir_item *item, | |
2624 | struct btrfs_key *key) | |
4d775673 | 2625 | { |
5f39d397 CM |
2626 | struct btrfs_disk_key disk_key; |
2627 | btrfs_dir_item_key(eb, item, &disk_key); | |
2628 | btrfs_disk_key_to_cpu(key, &disk_key); | |
4d775673 CM |
2629 | } |
2630 | ||
58176a96 | 2631 | |
5f39d397 | 2632 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
3768f368 | 2633 | { |
5f39d397 | 2634 | return key->type; |
3768f368 CM |
2635 | } |
2636 | ||
5f39d397 | 2637 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
3768f368 | 2638 | { |
5f39d397 | 2639 | key->type = val; |
3768f368 CM |
2640 | } |
2641 | ||
5f39d397 | 2642 | /* struct btrfs_header */ |
db94535d | 2643 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
5f39d397 CM |
2644 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
2645 | generation, 64); | |
2646 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | |
2647 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | |
63b10fc4 | 2648 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
5f39d397 | 2649 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
3cae210f QW |
2650 | BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, |
2651 | generation, 64); | |
2652 | BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); | |
2653 | BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, | |
2654 | nritems, 32); | |
2655 | BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); | |
0f7d52f4 | 2656 | |
63b10fc4 CM |
2657 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) |
2658 | { | |
2659 | return (btrfs_header_flags(eb) & flag) == flag; | |
2660 | } | |
2661 | ||
2662 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) | |
2663 | { | |
2664 | u64 flags = btrfs_header_flags(eb); | |
2665 | btrfs_set_header_flags(eb, flags | flag); | |
2666 | return (flags & flag) == flag; | |
2667 | } | |
2668 | ||
2669 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) | |
2670 | { | |
2671 | u64 flags = btrfs_header_flags(eb); | |
2672 | btrfs_set_header_flags(eb, flags & ~flag); | |
2673 | return (flags & flag) == flag; | |
2674 | } | |
2675 | ||
5d4f98a2 YZ |
2676 | static inline int btrfs_header_backref_rev(struct extent_buffer *eb) |
2677 | { | |
2678 | u64 flags = btrfs_header_flags(eb); | |
2679 | return flags >> BTRFS_BACKREF_REV_SHIFT; | |
2680 | } | |
2681 | ||
2682 | static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, | |
2683 | int rev) | |
2684 | { | |
2685 | u64 flags = btrfs_header_flags(eb); | |
2686 | flags &= ~BTRFS_BACKREF_REV_MASK; | |
2687 | flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; | |
2688 | btrfs_set_header_flags(eb, flags); | |
2689 | } | |
2690 | ||
0a4e5586 | 2691 | static inline unsigned long btrfs_header_fsid(void) |
0f7d52f4 | 2692 | { |
fba6aa75 | 2693 | return offsetof(struct btrfs_header, fsid); |
0f7d52f4 CM |
2694 | } |
2695 | ||
b308bc2f | 2696 | static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) |
e17cade2 | 2697 | { |
b308bc2f | 2698 | return offsetof(struct btrfs_header, chunk_tree_uuid); |
e17cade2 CM |
2699 | } |
2700 | ||
5f39d397 | 2701 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
3768f368 | 2702 | { |
d397712b | 2703 | return btrfs_header_level(eb) == 0; |
3768f368 CM |
2704 | } |
2705 | ||
5f39d397 | 2706 | /* struct btrfs_root_item */ |
84234f3a YZ |
2707 | BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, |
2708 | generation, 64); | |
5f39d397 | 2709 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); |
db94535d CM |
2710 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
2711 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); | |
3768f368 | 2712 | |
84234f3a YZ |
2713 | BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, |
2714 | generation, 64); | |
db94535d CM |
2715 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
2716 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); | |
5f39d397 CM |
2717 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
2718 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | |
f2b636e8 | 2719 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); |
db94535d CM |
2720 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
2721 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); | |
80ff3856 YZ |
2722 | BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, |
2723 | last_snapshot, 64); | |
8ea05e3a AB |
2724 | BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, |
2725 | generation_v2, 64); | |
2726 | BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, | |
2727 | ctransid, 64); | |
2728 | BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, | |
2729 | otransid, 64); | |
2730 | BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, | |
2731 | stransid, 64); | |
2732 | BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, | |
2733 | rtransid, 64); | |
123abc88 | 2734 | |
b83cc969 LZ |
2735 | static inline bool btrfs_root_readonly(struct btrfs_root *root) |
2736 | { | |
6ed3cf2c | 2737 | return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; |
b83cc969 LZ |
2738 | } |
2739 | ||
af31f5e5 CM |
2740 | /* struct btrfs_root_backup */ |
2741 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, | |
2742 | tree_root, 64); | |
2743 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, | |
2744 | tree_root_gen, 64); | |
2745 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, | |
2746 | tree_root_level, 8); | |
2747 | ||
2748 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, | |
2749 | chunk_root, 64); | |
2750 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, | |
2751 | chunk_root_gen, 64); | |
2752 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, | |
2753 | chunk_root_level, 8); | |
2754 | ||
2755 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, | |
2756 | extent_root, 64); | |
2757 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, | |
2758 | extent_root_gen, 64); | |
2759 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, | |
2760 | extent_root_level, 8); | |
2761 | ||
2762 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, | |
2763 | fs_root, 64); | |
2764 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, | |
2765 | fs_root_gen, 64); | |
2766 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, | |
2767 | fs_root_level, 8); | |
2768 | ||
2769 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, | |
2770 | dev_root, 64); | |
2771 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, | |
2772 | dev_root_gen, 64); | |
2773 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, | |
2774 | dev_root_level, 8); | |
2775 | ||
2776 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, | |
2777 | csum_root, 64); | |
2778 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, | |
2779 | csum_root_gen, 64); | |
2780 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, | |
2781 | csum_root_level, 8); | |
2782 | BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, | |
2783 | total_bytes, 64); | |
2784 | BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, | |
2785 | bytes_used, 64); | |
2786 | BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, | |
2787 | num_devices, 64); | |
2788 | ||
0940ebf6 ID |
2789 | /* struct btrfs_balance_item */ |
2790 | BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); | |
607d432d | 2791 | |
0940ebf6 ID |
2792 | static inline void btrfs_balance_data(struct extent_buffer *eb, |
2793 | struct btrfs_balance_item *bi, | |
2794 | struct btrfs_disk_balance_args *ba) | |
2795 | { | |
2796 | read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); | |
2797 | } | |
2798 | ||
2799 | static inline void btrfs_set_balance_data(struct extent_buffer *eb, | |
2800 | struct btrfs_balance_item *bi, | |
2801 | struct btrfs_disk_balance_args *ba) | |
2802 | { | |
2803 | write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); | |
2804 | } | |
2805 | ||
2806 | static inline void btrfs_balance_meta(struct extent_buffer *eb, | |
2807 | struct btrfs_balance_item *bi, | |
2808 | struct btrfs_disk_balance_args *ba) | |
2809 | { | |
2810 | read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); | |
2811 | } | |
2812 | ||
2813 | static inline void btrfs_set_balance_meta(struct extent_buffer *eb, | |
2814 | struct btrfs_balance_item *bi, | |
2815 | struct btrfs_disk_balance_args *ba) | |
2816 | { | |
2817 | write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); | |
2818 | } | |
2819 | ||
2820 | static inline void btrfs_balance_sys(struct extent_buffer *eb, | |
2821 | struct btrfs_balance_item *bi, | |
2822 | struct btrfs_disk_balance_args *ba) | |
2823 | { | |
2824 | read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); | |
2825 | } | |
2826 | ||
2827 | static inline void btrfs_set_balance_sys(struct extent_buffer *eb, | |
2828 | struct btrfs_balance_item *bi, | |
2829 | struct btrfs_disk_balance_args *ba) | |
2830 | { | |
2831 | write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); | |
2832 | } | |
2833 | ||
2834 | static inline void | |
2835 | btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, | |
2836 | struct btrfs_disk_balance_args *disk) | |
2837 | { | |
2838 | memset(cpu, 0, sizeof(*cpu)); | |
2839 | ||
2840 | cpu->profiles = le64_to_cpu(disk->profiles); | |
2841 | cpu->usage = le64_to_cpu(disk->usage); | |
2842 | cpu->devid = le64_to_cpu(disk->devid); | |
2843 | cpu->pstart = le64_to_cpu(disk->pstart); | |
2844 | cpu->pend = le64_to_cpu(disk->pend); | |
2845 | cpu->vstart = le64_to_cpu(disk->vstart); | |
2846 | cpu->vend = le64_to_cpu(disk->vend); | |
2847 | cpu->target = le64_to_cpu(disk->target); | |
2848 | cpu->flags = le64_to_cpu(disk->flags); | |
2849 | } | |
2850 | ||
2851 | static inline void | |
2852 | btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, | |
2853 | struct btrfs_balance_args *cpu) | |
2854 | { | |
2855 | memset(disk, 0, sizeof(*disk)); | |
2856 | ||
2857 | disk->profiles = cpu_to_le64(cpu->profiles); | |
2858 | disk->usage = cpu_to_le64(cpu->usage); | |
2859 | disk->devid = cpu_to_le64(cpu->devid); | |
2860 | disk->pstart = cpu_to_le64(cpu->pstart); | |
2861 | disk->pend = cpu_to_le64(cpu->pend); | |
2862 | disk->vstart = cpu_to_le64(cpu->vstart); | |
2863 | disk->vend = cpu_to_le64(cpu->vend); | |
2864 | disk->target = cpu_to_le64(cpu->target); | |
2865 | disk->flags = cpu_to_le64(cpu->flags); | |
2866 | } | |
2867 | ||
2868 | /* struct btrfs_super_block */ | |
db94535d | 2869 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
a061fc8d | 2870 | BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); |
5f39d397 CM |
2871 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
2872 | generation, 64); | |
2873 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | |
0b86a832 CM |
2874 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
2875 | struct btrfs_super_block, sys_chunk_array_size, 32); | |
84234f3a YZ |
2876 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, |
2877 | struct btrfs_super_block, chunk_root_generation, 64); | |
db94535d CM |
2878 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
2879 | root_level, 8); | |
0b86a832 CM |
2880 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
2881 | chunk_root, 64); | |
2882 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, | |
e02119d5 CM |
2883 | chunk_root_level, 8); |
2884 | BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, | |
2885 | log_root, 64); | |
c3027eb5 CM |
2886 | BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, |
2887 | log_root_transid, 64); | |
e02119d5 CM |
2888 | BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, |
2889 | log_root_level, 8); | |
db94535d CM |
2890 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
2891 | total_bytes, 64); | |
2892 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, | |
2893 | bytes_used, 64); | |
5f39d397 CM |
2894 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
2895 | sectorsize, 32); | |
2896 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | |
2897 | nodesize, 32); | |
2898 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, | |
2899 | leafsize, 32); | |
87ee04eb CM |
2900 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
2901 | stripesize, 32); | |
5f39d397 CM |
2902 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
2903 | root_dir_objectid, 64); | |
8a4b83cc CM |
2904 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
2905 | num_devices, 64); | |
f2b636e8 JB |
2906 | BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, |
2907 | compat_flags, 64); | |
2908 | BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, | |
12534832 | 2909 | compat_ro_flags, 64); |
f2b636e8 JB |
2910 | BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, |
2911 | incompat_flags, 64); | |
607d432d JB |
2912 | BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, |
2913 | csum_type, 16); | |
0af3d00b JB |
2914 | BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, |
2915 | cache_generation, 64); | |
3cae210f | 2916 | BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); |
26432799 SB |
2917 | BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, |
2918 | uuid_tree_generation, 64); | |
607d432d JB |
2919 | |
2920 | static inline int btrfs_super_csum_size(struct btrfs_super_block *s) | |
2921 | { | |
1104a885 DS |
2922 | u16 t = btrfs_super_csum_type(s); |
2923 | /* | |
2924 | * csum type is validated at mount time | |
2925 | */ | |
607d432d JB |
2926 | return btrfs_csum_sizes[t]; |
2927 | } | |
2e635a27 | 2928 | |
5f39d397 | 2929 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
2e635a27 | 2930 | { |
5f39d397 | 2931 | return offsetof(struct btrfs_leaf, items); |
2e635a27 CM |
2932 | } |
2933 | ||
5f39d397 CM |
2934 | /* struct btrfs_file_extent_item */ |
2935 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | |
3cae210f QW |
2936 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, |
2937 | struct btrfs_file_extent_item, disk_bytenr, 64); | |
2938 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, | |
2939 | struct btrfs_file_extent_item, offset, 64); | |
2940 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, | |
2941 | struct btrfs_file_extent_item, generation, 64); | |
2942 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, | |
2943 | struct btrfs_file_extent_item, num_bytes, 64); | |
e20d6c5b JB |
2944 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, |
2945 | struct btrfs_file_extent_item, disk_num_bytes, 64); | |
2946 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, | |
2947 | struct btrfs_file_extent_item, compression, 8); | |
9f5fae2f | 2948 | |
d397712b CM |
2949 | static inline unsigned long |
2950 | btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) | |
236454df | 2951 | { |
5f39d397 | 2952 | unsigned long offset = (unsigned long)e; |
db94535d | 2953 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 2954 | return offset; |
236454df CM |
2955 | } |
2956 | ||
2957 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
2958 | { | |
db94535d | 2959 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
9f5fae2f CM |
2960 | } |
2961 | ||
db94535d CM |
2962 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
2963 | disk_bytenr, 64); | |
5f39d397 CM |
2964 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
2965 | generation, 64); | |
db94535d CM |
2966 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
2967 | disk_num_bytes, 64); | |
5f39d397 CM |
2968 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
2969 | offset, 64); | |
db94535d CM |
2970 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
2971 | num_bytes, 64); | |
c8b97818 CM |
2972 | BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, |
2973 | ram_bytes, 64); | |
2974 | BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, | |
2975 | compression, 8); | |
2976 | BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, | |
2977 | encryption, 8); | |
2978 | BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, | |
2979 | other_encoding, 16); | |
2980 | ||
2981 | /* this returns the number of file bytes represented by the inline item. | |
2982 | * If an item is compressed, this is the uncompressed size | |
2983 | */ | |
2984 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, | |
2985 | struct btrfs_file_extent_item *e) | |
2986 | { | |
2987 | return btrfs_file_extent_ram_bytes(eb, e); | |
2988 | } | |
2989 | ||
2990 | /* | |
2991 | * this returns the number of bytes used by the item on disk, minus the | |
2992 | * size of any extent headers. If a file is compressed on disk, this is | |
2993 | * the compressed size | |
2994 | */ | |
2995 | static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, | |
2996 | struct btrfs_item *e) | |
2997 | { | |
2998 | unsigned long offset; | |
2999 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); | |
3000 | return btrfs_item_size(eb, e) - offset; | |
3001 | } | |
9f5fae2f | 3002 | |
733f4fbb SB |
3003 | /* btrfs_dev_stats_item */ |
3004 | static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb, | |
3005 | struct btrfs_dev_stats_item *ptr, | |
3006 | int index) | |
3007 | { | |
3008 | u64 val; | |
3009 | ||
3010 | read_extent_buffer(eb, &val, | |
3011 | offsetof(struct btrfs_dev_stats_item, values) + | |
3012 | ((unsigned long)ptr) + (index * sizeof(u64)), | |
3013 | sizeof(val)); | |
3014 | return val; | |
3015 | } | |
3016 | ||
3017 | static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, | |
3018 | struct btrfs_dev_stats_item *ptr, | |
3019 | int index, u64 val) | |
3020 | { | |
3021 | write_extent_buffer(eb, &val, | |
3022 | offsetof(struct btrfs_dev_stats_item, values) + | |
3023 | ((unsigned long)ptr) + (index * sizeof(u64)), | |
3024 | sizeof(val)); | |
3025 | } | |
3026 | ||
630dc772 AJ |
3027 | /* btrfs_qgroup_status_item */ |
3028 | BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, | |
3029 | generation, 64); | |
3030 | BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, | |
3031 | version, 64); | |
3032 | BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, | |
3033 | flags, 64); | |
2f232036 JS |
3034 | BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, |
3035 | rescan, 64); | |
630dc772 AJ |
3036 | |
3037 | /* btrfs_qgroup_info_item */ | |
3038 | BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, | |
3039 | generation, 64); | |
3040 | BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); | |
3041 | BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, | |
3042 | rfer_cmpr, 64); | |
3043 | BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); | |
3044 | BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, | |
3045 | excl_cmpr, 64); | |
3046 | ||
3047 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, | |
3048 | struct btrfs_qgroup_info_item, generation, 64); | |
3049 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, | |
3050 | rfer, 64); | |
3051 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, | |
3052 | struct btrfs_qgroup_info_item, rfer_cmpr, 64); | |
3053 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, | |
3054 | excl, 64); | |
3055 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, | |
3056 | struct btrfs_qgroup_info_item, excl_cmpr, 64); | |
3057 | ||
3058 | /* btrfs_qgroup_limit_item */ | |
3059 | BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, | |
3060 | flags, 64); | |
3061 | BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, | |
3062 | max_rfer, 64); | |
3063 | BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, | |
3064 | max_excl, 64); | |
3065 | BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, | |
3066 | rsv_rfer, 64); | |
3067 | BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, | |
3068 | rsv_excl, 64); | |
3069 | ||
a2bff640 SB |
3070 | /* btrfs_dev_replace_item */ |
3071 | BTRFS_SETGET_FUNCS(dev_replace_src_devid, | |
3072 | struct btrfs_dev_replace_item, src_devid, 64); | |
3073 | BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, | |
3074 | struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, | |
3075 | 64); | |
3076 | BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, | |
3077 | replace_state, 64); | |
3078 | BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, | |
3079 | time_started, 64); | |
3080 | BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, | |
3081 | time_stopped, 64); | |
3082 | BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, | |
3083 | num_write_errors, 64); | |
3084 | BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, | |
3085 | struct btrfs_dev_replace_item, num_uncorrectable_read_errors, | |
3086 | 64); | |
3087 | BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, | |
3088 | cursor_left, 64); | |
3089 | BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, | |
3090 | cursor_right, 64); | |
3091 | ||
3092 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, | |
3093 | struct btrfs_dev_replace_item, src_devid, 64); | |
3094 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, | |
3095 | struct btrfs_dev_replace_item, | |
3096 | cont_reading_from_srcdev_mode, 64); | |
3097 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, | |
3098 | struct btrfs_dev_replace_item, replace_state, 64); | |
3099 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, | |
3100 | struct btrfs_dev_replace_item, time_started, 64); | |
3101 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, | |
3102 | struct btrfs_dev_replace_item, time_stopped, 64); | |
3103 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, | |
3104 | struct btrfs_dev_replace_item, num_write_errors, 64); | |
3105 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, | |
3106 | struct btrfs_dev_replace_item, | |
3107 | num_uncorrectable_read_errors, 64); | |
3108 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, | |
3109 | struct btrfs_dev_replace_item, cursor_left, 64); | |
3110 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, | |
3111 | struct btrfs_dev_replace_item, cursor_right, 64); | |
3112 | ||
815745cf | 3113 | static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) |
e20d96d6 CM |
3114 | { |
3115 | return sb->s_fs_info; | |
3116 | } | |
3117 | ||
d397712b CM |
3118 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) |
3119 | { | |
db94535d CM |
3120 | if (level == 0) |
3121 | return root->leafsize; | |
3122 | return root->nodesize; | |
3123 | } | |
3124 | ||
4beb1b8b CM |
3125 | /* helper function to cast into the data area of the leaf. */ |
3126 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 | 3127 | ((type *)(btrfs_leaf_data(leaf) + \ |
5f39d397 CM |
3128 | btrfs_item_offset_nr(leaf, slot))) |
3129 | ||
3130 | #define btrfs_item_ptr_offset(leaf, slot) \ | |
3131 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | |
3132 | btrfs_item_offset_nr(leaf, slot))) | |
4beb1b8b | 3133 | |
67377734 JB |
3134 | static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) |
3135 | { | |
3136 | return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && | |
3137 | (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); | |
3138 | } | |
3139 | ||
3b16a4e3 JB |
3140 | static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) |
3141 | { | |
3142 | return mapping_gfp_mask(mapping) & ~__GFP_FS; | |
3143 | } | |
3144 | ||
b18c6685 | 3145 | /* extent-tree.c */ |
16cdcec7 | 3146 | static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root, |
9e0baf60 | 3147 | unsigned num_items) |
16cdcec7 MX |
3148 | { |
3149 | return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) * | |
c4fbb430 | 3150 | 2 * num_items; |
07127184 JB |
3151 | } |
3152 | ||
3153 | /* | |
3154 | * Doing a truncate won't result in new nodes or leaves, just what we need for | |
3155 | * COW. | |
3156 | */ | |
3157 | static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root, | |
3158 | unsigned num_items) | |
3159 | { | |
3160 | return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) * | |
3161 | num_items; | |
16cdcec7 MX |
3162 | } |
3163 | ||
1be41b78 JB |
3164 | int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans, |
3165 | struct btrfs_root *root); | |
fa9c0d79 | 3166 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
56bec294 CM |
3167 | int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, |
3168 | struct btrfs_root *root, unsigned long count); | |
31840ae1 | 3169 | int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len); |
a22285a6 YZ |
3170 | int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, |
3171 | struct btrfs_root *root, u64 bytenr, | |
3173a18f | 3172 | u64 offset, int metadata, u64 *refs, u64 *flags); |
11833d66 YZ |
3173 | int btrfs_pin_extent(struct btrfs_root *root, |
3174 | u64 bytenr, u64 num, int reserved); | |
dcfac415 | 3175 | int btrfs_pin_extent_for_log_replay(struct btrfs_root *root, |
e688b725 | 3176 | u64 bytenr, u64 num_bytes); |
8c2a1a30 JB |
3177 | int btrfs_exclude_logged_extents(struct btrfs_root *root, |
3178 | struct extent_buffer *eb); | |
80ff3856 | 3179 | int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, |
5d4f98a2 YZ |
3180 | struct btrfs_root *root, |
3181 | u64 objectid, u64 offset, u64 bytenr); | |
d397712b CM |
3182 | struct btrfs_block_group_cache *btrfs_lookup_block_group( |
3183 | struct btrfs_fs_info *info, | |
3184 | u64 bytenr); | |
5d4f98a2 | 3185 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
6ab0a202 | 3186 | int get_block_group_index(struct btrfs_block_group_cache *cache); |
5f39d397 | 3187 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
5d4f98a2 YZ |
3188 | struct btrfs_root *root, u32 blocksize, |
3189 | u64 parent, u64 root_objectid, | |
3190 | struct btrfs_disk_key *key, int level, | |
5581a51a | 3191 | u64 hint, u64 empty_size); |
f0486c68 YZ |
3192 | void btrfs_free_tree_block(struct btrfs_trans_handle *trans, |
3193 | struct btrfs_root *root, | |
3194 | struct extent_buffer *buf, | |
5581a51a | 3195 | u64 parent, int last_ref); |
5d4f98a2 YZ |
3196 | int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, |
3197 | struct btrfs_root *root, | |
3198 | u64 root_objectid, u64 owner, | |
3199 | u64 offset, struct btrfs_key *ins); | |
3200 | int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, | |
3201 | struct btrfs_root *root, | |
3202 | u64 root_objectid, u64 owner, u64 offset, | |
3203 | struct btrfs_key *ins); | |
00361589 JB |
3204 | int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes, |
3205 | u64 min_alloc_size, u64 empty_size, u64 hint_byte, | |
3206 | struct btrfs_key *ins, int is_data); | |
e089f05c | 3207 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
66d7e7f0 | 3208 | struct extent_buffer *buf, int full_backref, int for_cow); |
5d4f98a2 | 3209 | int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
66d7e7f0 | 3210 | struct extent_buffer *buf, int full_backref, int for_cow); |
5d4f98a2 YZ |
3211 | int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, |
3212 | struct btrfs_root *root, | |
3213 | u64 bytenr, u64 num_bytes, u64 flags, | |
b1c79e09 | 3214 | int level, int is_data); |
31840ae1 ZY |
3215 | int btrfs_free_extent(struct btrfs_trans_handle *trans, |
3216 | struct btrfs_root *root, | |
66d7e7f0 AJ |
3217 | u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, |
3218 | u64 owner, u64 offset, int for_cow); | |
5d4f98a2 | 3219 | |
65b51a00 | 3220 | int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len); |
e688b725 CM |
3221 | int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root, |
3222 | u64 start, u64 len); | |
143bede5 JM |
3223 | void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, |
3224 | struct btrfs_root *root); | |
ccd467d6 | 3225 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
11833d66 | 3226 | struct btrfs_root *root); |
b18c6685 | 3227 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
31840ae1 ZY |
3228 | struct btrfs_root *root, |
3229 | u64 bytenr, u64 num_bytes, u64 parent, | |
66d7e7f0 | 3230 | u64 root_objectid, u64 owner, u64 offset, int for_cow); |
5d4f98a2 | 3231 | |
9078a3e1 CM |
3232 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
3233 | struct btrfs_root *root); | |
d2fb3437 | 3234 | int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr); |
9078a3e1 CM |
3235 | int btrfs_free_block_groups(struct btrfs_fs_info *info); |
3236 | int btrfs_read_block_groups(struct btrfs_root *root); | |
ba1bf481 | 3237 | int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr); |
0b86a832 CM |
3238 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
3239 | struct btrfs_root *root, u64 bytes_used, | |
e17cade2 | 3240 | u64 type, u64 chunk_objectid, u64 chunk_offset, |
0b86a832 | 3241 | u64 size); |
1a40e23b ZY |
3242 | int btrfs_remove_block_group(struct btrfs_trans_handle *trans, |
3243 | struct btrfs_root *root, u64 group_start); | |
ea658bad JB |
3244 | void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans, |
3245 | struct btrfs_root *root); | |
6d07bcec | 3246 | u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data); |
4184ea7f | 3247 | void btrfs_clear_space_info_full(struct btrfs_fs_info *info); |
08e007d2 MX |
3248 | |
3249 | enum btrfs_reserve_flush_enum { | |
3250 | /* If we are in the transaction, we can't flush anything.*/ | |
3251 | BTRFS_RESERVE_NO_FLUSH, | |
3252 | /* | |
3253 | * Flushing delalloc may cause deadlock somewhere, in this | |
3254 | * case, use FLUSH LIMIT | |
3255 | */ | |
3256 | BTRFS_RESERVE_FLUSH_LIMIT, | |
3257 | BTRFS_RESERVE_FLUSH_ALL, | |
3258 | }; | |
3259 | ||
0ca1f7ce YZ |
3260 | int btrfs_check_data_free_space(struct inode *inode, u64 bytes); |
3261 | void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes); | |
a22285a6 YZ |
3262 | void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, |
3263 | struct btrfs_root *root); | |
d68fc57b YZ |
3264 | int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, |
3265 | struct inode *inode); | |
3266 | void btrfs_orphan_release_metadata(struct inode *inode); | |
d5c12070 MX |
3267 | int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, |
3268 | struct btrfs_block_rsv *rsv, | |
3269 | int nitems, | |
ee3441b4 | 3270 | u64 *qgroup_reserved, bool use_global_rsv); |
d5c12070 MX |
3271 | void btrfs_subvolume_release_metadata(struct btrfs_root *root, |
3272 | struct btrfs_block_rsv *rsv, | |
3273 | u64 qgroup_reserved); | |
0ca1f7ce YZ |
3274 | int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes); |
3275 | void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes); | |
3276 | int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes); | |
3277 | void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes); | |
66d8f3dd MX |
3278 | void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); |
3279 | struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root, | |
3280 | unsigned short type); | |
f0486c68 YZ |
3281 | void btrfs_free_block_rsv(struct btrfs_root *root, |
3282 | struct btrfs_block_rsv *rsv); | |
4a92b1b8 | 3283 | int btrfs_block_rsv_add(struct btrfs_root *root, |
08e007d2 MX |
3284 | struct btrfs_block_rsv *block_rsv, u64 num_bytes, |
3285 | enum btrfs_reserve_flush_enum flush); | |
4a92b1b8 | 3286 | int btrfs_block_rsv_check(struct btrfs_root *root, |
36ba022a JB |
3287 | struct btrfs_block_rsv *block_rsv, int min_factor); |
3288 | int btrfs_block_rsv_refill(struct btrfs_root *root, | |
08e007d2 MX |
3289 | struct btrfs_block_rsv *block_rsv, u64 min_reserved, |
3290 | enum btrfs_reserve_flush_enum flush); | |
f0486c68 YZ |
3291 | int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, |
3292 | struct btrfs_block_rsv *dst_rsv, | |
3293 | u64 num_bytes); | |
d52be818 JB |
3294 | int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, |
3295 | struct btrfs_block_rsv *dest, u64 num_bytes, | |
3296 | int min_factor); | |
f0486c68 YZ |
3297 | void btrfs_block_rsv_release(struct btrfs_root *root, |
3298 | struct btrfs_block_rsv *block_rsv, | |
3299 | u64 num_bytes); | |
3300 | int btrfs_set_block_group_ro(struct btrfs_root *root, | |
3301 | struct btrfs_block_group_cache *cache); | |
143bede5 JM |
3302 | void btrfs_set_block_group_rw(struct btrfs_root *root, |
3303 | struct btrfs_block_group_cache *cache); | |
0af3d00b | 3304 | void btrfs_put_block_group_cache(struct btrfs_fs_info *info); |
6d07bcec | 3305 | u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); |
acce952b | 3306 | int btrfs_error_unpin_extent_range(struct btrfs_root *root, |
3307 | u64 start, u64 end); | |
3308 | int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr, | |
5378e607 | 3309 | u64 num_bytes, u64 *actual_bytes); |
c87f08ca CM |
3310 | int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, |
3311 | struct btrfs_root *root, u64 type); | |
f7039b1d | 3312 | int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range); |
acce952b | 3313 | |
c59021f8 | 3314 | int btrfs_init_space_info(struct btrfs_fs_info *fs_info); |
bed92eae AJ |
3315 | int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, |
3316 | struct btrfs_fs_info *fs_info); | |
31e50229 | 3317 | int __get_raid_index(u64 flags); |
dee26a9f | 3318 | /* ctree.c */ |
5d4f98a2 YZ |
3319 | int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, |
3320 | int level, int *slot); | |
3321 | int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); | |
0b86a832 CM |
3322 | int btrfs_previous_item(struct btrfs_root *root, |
3323 | struct btrfs_path *path, u64 min_objectid, | |
3324 | int type); | |
afe5fea7 | 3325 | void btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path, |
143bede5 | 3326 | struct btrfs_key *new_key); |
925baedd CM |
3327 | struct extent_buffer *btrfs_root_node(struct btrfs_root *root); |
3328 | struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); | |
e7a84565 | 3329 | int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, |
3f157a2f | 3330 | struct btrfs_key *key, int lowest_level, |
de78b51a | 3331 | u64 min_trans); |
3f157a2f | 3332 | int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, |
de78b51a | 3333 | struct btrfs_path *path, |
3f157a2f | 3334 | u64 min_trans); |
7069830a AB |
3335 | enum btrfs_compare_tree_result { |
3336 | BTRFS_COMPARE_TREE_NEW, | |
3337 | BTRFS_COMPARE_TREE_DELETED, | |
3338 | BTRFS_COMPARE_TREE_CHANGED, | |
ba5e8f2e | 3339 | BTRFS_COMPARE_TREE_SAME, |
7069830a AB |
3340 | }; |
3341 | typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root, | |
3342 | struct btrfs_root *right_root, | |
3343 | struct btrfs_path *left_path, | |
3344 | struct btrfs_path *right_path, | |
3345 | struct btrfs_key *key, | |
3346 | enum btrfs_compare_tree_result result, | |
3347 | void *ctx); | |
3348 | int btrfs_compare_trees(struct btrfs_root *left_root, | |
3349 | struct btrfs_root *right_root, | |
3350 | btrfs_changed_cb_t cb, void *ctx); | |
5f39d397 CM |
3351 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
3352 | struct btrfs_root *root, struct extent_buffer *buf, | |
3353 | struct extent_buffer *parent, int parent_slot, | |
9fa8cfe7 | 3354 | struct extent_buffer **cow_ret); |
be20aa9d CM |
3355 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
3356 | struct btrfs_root *root, | |
3357 | struct extent_buffer *buf, | |
3358 | struct extent_buffer **cow_ret, u64 new_root_objectid); | |
5d4f98a2 YZ |
3359 | int btrfs_block_can_be_shared(struct btrfs_root *root, |
3360 | struct extent_buffer *buf); | |
4b90c680 | 3361 | void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path, |
143bede5 | 3362 | u32 data_size); |
afe5fea7 | 3363 | void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path, |
143bede5 | 3364 | u32 new_size, int from_end); |
459931ec CM |
3365 | int btrfs_split_item(struct btrfs_trans_handle *trans, |
3366 | struct btrfs_root *root, | |
3367 | struct btrfs_path *path, | |
3368 | struct btrfs_key *new_key, | |
3369 | unsigned long split_offset); | |
ad48fd75 YZ |
3370 | int btrfs_duplicate_item(struct btrfs_trans_handle *trans, |
3371 | struct btrfs_root *root, | |
3372 | struct btrfs_path *path, | |
3373 | struct btrfs_key *new_key); | |
e33d5c3d KN |
3374 | int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, |
3375 | u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); | |
e089f05c CM |
3376 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
3377 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
3378 | ins_len, int cow); | |
5d9e75c4 JS |
3379 | int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key, |
3380 | struct btrfs_path *p, u64 time_seq); | |
2f38b3e1 AJ |
3381 | int btrfs_search_slot_for_read(struct btrfs_root *root, |
3382 | struct btrfs_key *key, struct btrfs_path *p, | |
3383 | int find_higher, int return_any); | |
6702ed49 | 3384 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
5f39d397 | 3385 | struct btrfs_root *root, struct extent_buffer *parent, |
de78b51a | 3386 | int start_slot, u64 *last_ret, |
a6b6e75e | 3387 | struct btrfs_key *progress); |
b3b4aa74 | 3388 | void btrfs_release_path(struct btrfs_path *p); |
2c90e5d6 CM |
3389 | struct btrfs_path *btrfs_alloc_path(void); |
3390 | void btrfs_free_path(struct btrfs_path *p); | |
b4ce94de | 3391 | void btrfs_set_path_blocking(struct btrfs_path *p); |
16cdcec7 | 3392 | void btrfs_clear_path_blocking(struct btrfs_path *p, |
bd681513 | 3393 | struct extent_buffer *held, int held_rw); |
b4ce94de CM |
3394 | void btrfs_unlock_up_safe(struct btrfs_path *p, int level); |
3395 | ||
85e21bac CM |
3396 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
3397 | struct btrfs_path *path, int slot, int nr); | |
85e21bac CM |
3398 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, |
3399 | struct btrfs_root *root, | |
3400 | struct btrfs_path *path) | |
3401 | { | |
3402 | return btrfs_del_items(trans, root, path, path->slots[0], 1); | |
3403 | } | |
3404 | ||
afe5fea7 | 3405 | void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, |
143bede5 JM |
3406 | struct btrfs_key *cpu_key, u32 *data_size, |
3407 | u32 total_data, u32 total_size, int nr); | |
e089f05c CM |
3408 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
3409 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
9c58309d CM |
3410 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
3411 | struct btrfs_root *root, | |
3412 | struct btrfs_path *path, | |
3413 | struct btrfs_key *cpu_key, u32 *data_size, int nr); | |
3414 | ||
3415 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, | |
3416 | struct btrfs_root *root, | |
3417 | struct btrfs_path *path, | |
3418 | struct btrfs_key *key, | |
3419 | u32 data_size) | |
3420 | { | |
3421 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); | |
3422 | } | |
3423 | ||
234b63a0 | 3424 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
16e7549f | 3425 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
3d7806ec JS |
3426 | int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, |
3427 | u64 time_seq); | |
1c8f52a5 AB |
3428 | static inline int btrfs_next_old_item(struct btrfs_root *root, |
3429 | struct btrfs_path *p, u64 time_seq) | |
c7d22a3c JS |
3430 | { |
3431 | ++p->slots[0]; | |
3432 | if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) | |
1c8f52a5 | 3433 | return btrfs_next_old_leaf(root, p, time_seq); |
c7d22a3c JS |
3434 | return 0; |
3435 | } | |
1c8f52a5 AB |
3436 | static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) |
3437 | { | |
3438 | return btrfs_next_old_item(root, p, 0); | |
3439 | } | |
5f39d397 | 3440 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
2c536799 JM |
3441 | int __must_check btrfs_drop_snapshot(struct btrfs_root *root, |
3442 | struct btrfs_block_rsv *block_rsv, | |
3443 | int update_ref, int for_reloc); | |
f82d02d9 YZ |
3444 | int btrfs_drop_subtree(struct btrfs_trans_handle *trans, |
3445 | struct btrfs_root *root, | |
3446 | struct extent_buffer *node, | |
3447 | struct extent_buffer *parent); | |
7841cb28 DS |
3448 | static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) |
3449 | { | |
3450 | /* | |
3451 | * Get synced with close_ctree() | |
3452 | */ | |
3453 | smp_mb(); | |
3454 | return fs_info->closing; | |
3455 | } | |
babbf170 MX |
3456 | |
3457 | /* | |
3458 | * If we remount the fs to be R/O or umount the fs, the cleaner needn't do | |
3459 | * anything except sleeping. This function is used to check the status of | |
3460 | * the fs. | |
3461 | */ | |
3462 | static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root) | |
3463 | { | |
3464 | return (root->fs_info->sb->s_flags & MS_RDONLY || | |
3465 | btrfs_fs_closing(root->fs_info)); | |
3466 | } | |
3467 | ||
6c41761f DS |
3468 | static inline void free_fs_info(struct btrfs_fs_info *fs_info) |
3469 | { | |
837d5b6e | 3470 | kfree(fs_info->balance_ctl); |
6c41761f DS |
3471 | kfree(fs_info->delayed_root); |
3472 | kfree(fs_info->extent_root); | |
3473 | kfree(fs_info->tree_root); | |
3474 | kfree(fs_info->chunk_root); | |
3475 | kfree(fs_info->dev_root); | |
3476 | kfree(fs_info->csum_root); | |
bcef60f2 | 3477 | kfree(fs_info->quota_root); |
d8f98039 | 3478 | kfree(fs_info->uuid_root); |
6c41761f DS |
3479 | kfree(fs_info->super_copy); |
3480 | kfree(fs_info->super_for_commit); | |
3481 | kfree(fs_info); | |
3482 | } | |
7841cb28 | 3483 | |
097b8a7c JS |
3484 | /* tree mod log functions from ctree.c */ |
3485 | u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, | |
3486 | struct seq_list *elem); | |
3487 | void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, | |
3488 | struct seq_list *elem); | |
fc36ed7e | 3489 | u64 btrfs_tree_mod_seq_prev(u64 seq); |
5b6602e7 | 3490 | int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); |
097b8a7c | 3491 | |
dee26a9f | 3492 | /* root-item.c */ |
ea9e8b11 | 3493 | int btrfs_find_root_ref(struct btrfs_root *tree_root, |
4df27c4d YZ |
3494 | struct btrfs_path *path, |
3495 | u64 root_id, u64 ref_id); | |
0660b5af CM |
3496 | int btrfs_add_root_ref(struct btrfs_trans_handle *trans, |
3497 | struct btrfs_root *tree_root, | |
4df27c4d YZ |
3498 | u64 root_id, u64 ref_id, u64 dirid, u64 sequence, |
3499 | const char *name, int name_len); | |
3500 | int btrfs_del_root_ref(struct btrfs_trans_handle *trans, | |
3501 | struct btrfs_root *tree_root, | |
3502 | u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, | |
0660b5af | 3503 | const char *name, int name_len); |
e089f05c CM |
3504 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
3505 | struct btrfs_key *key); | |
3506 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
3507 | *root, struct btrfs_key *key, struct btrfs_root_item | |
3508 | *item); | |
b45a9d8b JM |
3509 | int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, |
3510 | struct btrfs_root *root, | |
3511 | struct btrfs_key *key, | |
3512 | struct btrfs_root_item *item); | |
cb517eab MX |
3513 | int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key, |
3514 | struct btrfs_path *path, struct btrfs_root_item *root_item, | |
3515 | struct btrfs_key *root_key); | |
76dda93c | 3516 | int btrfs_find_orphan_roots(struct btrfs_root *tree_root); |
bf5f32ec MF |
3517 | void btrfs_set_root_node(struct btrfs_root_item *item, |
3518 | struct extent_buffer *node); | |
08fe4db1 | 3519 | void btrfs_check_and_init_root_item(struct btrfs_root_item *item); |
8ea05e3a AB |
3520 | void btrfs_update_root_times(struct btrfs_trans_handle *trans, |
3521 | struct btrfs_root *root); | |
08fe4db1 | 3522 | |
07b30a49 SB |
3523 | /* uuid-tree.c */ |
3524 | int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, | |
3525 | struct btrfs_root *uuid_root, u8 *uuid, u8 type, | |
3526 | u64 subid); | |
3527 | int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans, | |
3528 | struct btrfs_root *uuid_root, u8 *uuid, u8 type, | |
3529 | u64 subid); | |
70f80175 SB |
3530 | int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, |
3531 | int (*check_func)(struct btrfs_fs_info *, u8 *, u8, | |
3532 | u64)); | |
07b30a49 | 3533 | |
dee26a9f | 3534 | /* dir-item.c */ |
9c52057c CM |
3535 | int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, |
3536 | const char *name, int name_len); | |
d397712b CM |
3537 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, |
3538 | struct btrfs_root *root, const char *name, | |
16cdcec7 | 3539 | int name_len, struct inode *dir, |
aec7477b | 3540 | struct btrfs_key *location, u8 type, u64 index); |
7e38180e CM |
3541 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
3542 | struct btrfs_root *root, | |
3543 | struct btrfs_path *path, u64 dir, | |
3544 | const char *name, int name_len, | |
3545 | int mod); | |
3546 | struct btrfs_dir_item * | |
3547 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | |
3548 | struct btrfs_root *root, | |
3549 | struct btrfs_path *path, u64 dir, | |
3550 | u64 objectid, const char *name, int name_len, | |
3551 | int mod); | |
4df27c4d YZ |
3552 | struct btrfs_dir_item * |
3553 | btrfs_search_dir_index_item(struct btrfs_root *root, | |
3554 | struct btrfs_path *path, u64 dirid, | |
3555 | const char *name, int name_len); | |
7e38180e CM |
3556 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
3557 | struct btrfs_root *root, | |
3558 | struct btrfs_path *path, | |
3559 | struct btrfs_dir_item *di); | |
5103e947 | 3560 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
f34f57a3 YZ |
3561 | struct btrfs_root *root, |
3562 | struct btrfs_path *path, u64 objectid, | |
3563 | const char *name, u16 name_len, | |
3564 | const void *data, u16 data_len); | |
5103e947 JB |
3565 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, |
3566 | struct btrfs_root *root, | |
3567 | struct btrfs_path *path, u64 dir, | |
3568 | const char *name, u16 name_len, | |
3569 | int mod); | |
22a94d44 JB |
3570 | int verify_dir_item(struct btrfs_root *root, |
3571 | struct extent_buffer *leaf, | |
3572 | struct btrfs_dir_item *dir_item); | |
7b128766 JB |
3573 | |
3574 | /* orphan.c */ | |
3575 | int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, | |
3576 | struct btrfs_root *root, u64 offset); | |
3577 | int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, | |
3578 | struct btrfs_root *root, u64 offset); | |
4df27c4d | 3579 | int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); |
7b128766 | 3580 | |
dee26a9f | 3581 | /* inode-item.c */ |
3954401f CM |
3582 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
3583 | struct btrfs_root *root, | |
3584 | const char *name, int name_len, | |
aec7477b | 3585 | u64 inode_objectid, u64 ref_objectid, u64 index); |
3954401f CM |
3586 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, |
3587 | struct btrfs_root *root, | |
3588 | const char *name, int name_len, | |
aec7477b | 3589 | u64 inode_objectid, u64 ref_objectid, u64 *index); |
5f39d397 CM |
3590 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
3591 | struct btrfs_root *root, | |
3592 | struct btrfs_path *path, u64 objectid); | |
293ffd5f | 3593 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
3594 | *root, struct btrfs_path *path, |
3595 | struct btrfs_key *location, int mod); | |
dee26a9f | 3596 | |
f186373f MF |
3597 | struct btrfs_inode_extref * |
3598 | btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, | |
3599 | struct btrfs_root *root, | |
3600 | struct btrfs_path *path, | |
3601 | const char *name, int name_len, | |
3602 | u64 inode_objectid, u64 ref_objectid, int ins_len, | |
3603 | int cow); | |
3604 | ||
3605 | int btrfs_find_name_in_ext_backref(struct btrfs_path *path, | |
3606 | u64 ref_objectid, const char *name, | |
3607 | int name_len, | |
3608 | struct btrfs_inode_extref **extref_ret); | |
3609 | ||
dee26a9f | 3610 | /* file-item.c */ |
facc8a22 | 3611 | struct btrfs_dio_private; |
459931ec CM |
3612 | int btrfs_del_csums(struct btrfs_trans_handle *trans, |
3613 | struct btrfs_root *root, u64 bytenr, u64 len); | |
61b49440 | 3614 | int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, |
d20f7043 | 3615 | struct bio *bio, u32 *dst); |
4b46fce2 | 3616 | int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode, |
facc8a22 MX |
3617 | struct btrfs_dio_private *dip, struct bio *bio, |
3618 | u64 logical_offset); | |
b18c6685 | 3619 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
c8b97818 CM |
3620 | struct btrfs_root *root, |
3621 | u64 objectid, u64 pos, | |
3622 | u64 disk_offset, u64 disk_num_bytes, | |
3623 | u64 num_bytes, u64 offset, u64 ram_bytes, | |
3624 | u8 compression, u8 encryption, u16 other_encoding); | |
dee26a9f CM |
3625 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
3626 | struct btrfs_root *root, | |
3627 | struct btrfs_path *path, u64 objectid, | |
db94535d | 3628 | u64 bytenr, int mod); |
065631f6 | 3629 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
d20f7043 | 3630 | struct btrfs_root *root, |
e6dcd2dc | 3631 | struct btrfs_ordered_sum *sums); |
3edf7d33 | 3632 | int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, |
d20f7043 | 3633 | struct bio *bio, u64 file_start, int contig); |
a2de733c AJ |
3634 | int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, |
3635 | struct list_head *list, int search_commit); | |
39279cc3 | 3636 | /* inode.c */ |
8ccf6f19 MX |
3637 | struct btrfs_delalloc_work { |
3638 | struct inode *inode; | |
3639 | int wait; | |
3640 | int delay_iput; | |
3641 | struct completion completion; | |
3642 | struct list_head list; | |
3643 | struct btrfs_work work; | |
3644 | }; | |
3645 | ||
3646 | struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode, | |
3647 | int wait, int delay_iput); | |
3648 | void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work); | |
3649 | ||
b2675157 JB |
3650 | struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page, |
3651 | size_t pg_offset, u64 start, u64 len, | |
3652 | int create); | |
00361589 | 3653 | noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, |
7ee9e440 JB |
3654 | u64 *orig_start, u64 *orig_block_len, |
3655 | u64 *ram_bytes); | |
4881ee5a CM |
3656 | |
3657 | /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ | |
5036f538 | 3658 | #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) |
4881ee5a CM |
3659 | #define ClearPageChecked ClearPageFsMisc |
3660 | #define SetPageChecked SetPageFsMisc | |
3661 | #define PageChecked PageFsMisc | |
3662 | #endif | |
3663 | ||
b6973aa6 LZ |
3664 | /* This forces readahead on a given range of bytes in an inode */ |
3665 | static inline void btrfs_force_ra(struct address_space *mapping, | |
3666 | struct file_ra_state *ra, struct file *file, | |
3667 | pgoff_t offset, unsigned long req_size) | |
3668 | { | |
3669 | page_cache_sync_readahead(mapping, ra, file, offset, req_size); | |
3670 | } | |
3671 | ||
3de4586c CM |
3672 | struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); |
3673 | int btrfs_set_inode_index(struct inode *dir, u64 *index); | |
e02119d5 CM |
3674 | int btrfs_unlink_inode(struct btrfs_trans_handle *trans, |
3675 | struct btrfs_root *root, | |
3676 | struct inode *dir, struct inode *inode, | |
3677 | const char *name, int name_len); | |
3678 | int btrfs_add_link(struct btrfs_trans_handle *trans, | |
3679 | struct inode *parent_inode, struct inode *inode, | |
3680 | const char *name, int name_len, int add_backref, u64 index); | |
4df27c4d YZ |
3681 | int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, |
3682 | struct btrfs_root *root, | |
3683 | struct inode *dir, u64 objectid, | |
3684 | const char *name, int name_len); | |
2aaa6655 JB |
3685 | int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len, |
3686 | int front); | |
e02119d5 CM |
3687 | int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, |
3688 | struct btrfs_root *root, | |
3689 | struct inode *inode, u64 new_size, | |
3690 | u32 min_type); | |
3691 | ||
24bbcf04 | 3692 | int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); |
91aef86f | 3693 | int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput); |
2ac55d41 JB |
3694 | int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, |
3695 | struct extent_state **cached_state); | |
d2fb3437 | 3696 | int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, |
d82a6f1d | 3697 | struct btrfs_root *new_root, u64 new_dirid); |
64a16701 DW |
3698 | int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset, |
3699 | size_t size, struct bio *bio, | |
3700 | unsigned long bio_flags); | |
c2ec175c | 3701 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); |
9ebefb18 | 3702 | int btrfs_readpage(struct file *file, struct page *page); |
bd555975 | 3703 | void btrfs_evict_inode(struct inode *inode); |
a9185b41 | 3704 | int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); |
39279cc3 CM |
3705 | struct inode *btrfs_alloc_inode(struct super_block *sb); |
3706 | void btrfs_destroy_inode(struct inode *inode); | |
45321ac5 | 3707 | int btrfs_drop_inode(struct inode *inode); |
39279cc3 CM |
3708 | int btrfs_init_cachep(void); |
3709 | void btrfs_destroy_cachep(void); | |
6bf13c0c | 3710 | long btrfs_ioctl_trans_end(struct file *file); |
1a54ef8c | 3711 | struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, |
73f73415 | 3712 | struct btrfs_root *root, int *was_new); |
a52d9a80 | 3713 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
306e16ce | 3714 | size_t pg_offset, u64 start, u64 end, |
a52d9a80 CM |
3715 | int create); |
3716 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
3717 | struct btrfs_root *root, | |
3718 | struct inode *inode); | |
be6aef60 JB |
3719 | int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, |
3720 | struct btrfs_root *root, struct inode *inode); | |
5b21f2ed | 3721 | int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode); |
66b4ffd1 | 3722 | int btrfs_orphan_cleanup(struct btrfs_root *root); |
d68fc57b YZ |
3723 | void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, |
3724 | struct btrfs_root *root); | |
a41ad394 | 3725 | int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); |
143bede5 | 3726 | void btrfs_invalidate_inodes(struct btrfs_root *root); |
24bbcf04 YZ |
3727 | void btrfs_add_delayed_iput(struct inode *inode); |
3728 | void btrfs_run_delayed_iputs(struct btrfs_root *root); | |
efa56464 YZ |
3729 | int btrfs_prealloc_file_range(struct inode *inode, int mode, |
3730 | u64 start, u64 num_bytes, u64 min_size, | |
3731 | loff_t actual_len, u64 *alloc_hint); | |
0af3d00b JB |
3732 | int btrfs_prealloc_file_range_trans(struct inode *inode, |
3733 | struct btrfs_trans_handle *trans, int mode, | |
3734 | u64 start, u64 num_bytes, u64 min_size, | |
3735 | loff_t actual_len, u64 *alloc_hint); | |
82d339d9 | 3736 | extern const struct dentry_operations btrfs_dentry_operations; |
f46b5a66 CH |
3737 | |
3738 | /* ioctl.c */ | |
3739 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); | |
6cbff00f CH |
3740 | void btrfs_update_iflags(struct inode *inode); |
3741 | void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); | |
dd5f9615 | 3742 | int btrfs_is_empty_uuid(u8 *uuid); |
4cb5300b CM |
3743 | int btrfs_defrag_file(struct inode *inode, struct file *file, |
3744 | struct btrfs_ioctl_defrag_range_args *range, | |
3745 | u64 newer_than, unsigned long max_pages); | |
5af3e8cc SB |
3746 | void btrfs_get_block_group_info(struct list_head *groups_list, |
3747 | struct btrfs_ioctl_space_info *space); | |
35a3621b SB |
3748 | void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock, |
3749 | struct btrfs_ioctl_balance_args *bargs); | |
3750 | ||
5af3e8cc | 3751 | |
39279cc3 | 3752 | /* file.c */ |
9247f317 MX |
3753 | int btrfs_auto_defrag_init(void); |
3754 | void btrfs_auto_defrag_exit(void); | |
4cb5300b CM |
3755 | int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, |
3756 | struct inode *inode); | |
3757 | int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); | |
26176e7c | 3758 | void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); |
02c24a82 | 3759 | int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); |
7014cdb4 JB |
3760 | void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, |
3761 | int skip_pinned); | |
828c0950 | 3762 | extern const struct file_operations btrfs_file_operations; |
5dc562c5 JB |
3763 | int __btrfs_drop_extents(struct btrfs_trans_handle *trans, |
3764 | struct btrfs_root *root, struct inode *inode, | |
3765 | struct btrfs_path *path, u64 start, u64 end, | |
2aaa6655 | 3766 | u64 *drop_end, int drop_cache); |
5dc562c5 JB |
3767 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, |
3768 | struct btrfs_root *root, struct inode *inode, u64 start, | |
2671485d | 3769 | u64 end, int drop_cache); |
d899e052 | 3770 | int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, |
d899e052 | 3771 | struct inode *inode, u64 start, u64 end); |
6bf13c0c | 3772 | int btrfs_release_file(struct inode *inode, struct file *file); |
be1a12a0 JB |
3773 | int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode, |
3774 | struct page **pages, size_t num_pages, | |
3775 | loff_t pos, size_t write_bytes, | |
3776 | struct extent_state **cached); | |
6bf13c0c | 3777 | |
6702ed49 CM |
3778 | /* tree-defrag.c */ |
3779 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | |
de78b51a | 3780 | struct btrfs_root *root); |
58176a96 JB |
3781 | |
3782 | /* sysfs.c */ | |
3783 | int btrfs_init_sysfs(void); | |
3784 | void btrfs_exit_sysfs(void); | |
5ac1d209 JM |
3785 | int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info); |
3786 | void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info); | |
58176a96 | 3787 | |
5103e947 JB |
3788 | /* xattr.c */ |
3789 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
6099afe8 | 3790 | |
edbd8d4e | 3791 | /* super.c */ |
edf24abe | 3792 | int btrfs_parse_options(struct btrfs_root *root, char *options); |
6bf13c0c | 3793 | int btrfs_sync_fs(struct super_block *sb, int wait); |
533574c6 JP |
3794 | |
3795 | #ifdef CONFIG_PRINTK | |
3796 | __printf(2, 3) | |
c2cf52eb | 3797 | void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); |
533574c6 JP |
3798 | #else |
3799 | static inline __printf(2, 3) | |
c2cf52eb | 3800 | void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) |
533574c6 JP |
3801 | { |
3802 | } | |
3803 | #endif | |
3804 | ||
c2cf52eb SK |
3805 | #define btrfs_emerg(fs_info, fmt, args...) \ |
3806 | btrfs_printk(fs_info, KERN_EMERG fmt, ##args) | |
3807 | #define btrfs_alert(fs_info, fmt, args...) \ | |
3808 | btrfs_printk(fs_info, KERN_ALERT fmt, ##args) | |
3809 | #define btrfs_crit(fs_info, fmt, args...) \ | |
3810 | btrfs_printk(fs_info, KERN_CRIT fmt, ##args) | |
3811 | #define btrfs_err(fs_info, fmt, args...) \ | |
3812 | btrfs_printk(fs_info, KERN_ERR fmt, ##args) | |
3813 | #define btrfs_warn(fs_info, fmt, args...) \ | |
3814 | btrfs_printk(fs_info, KERN_WARNING fmt, ##args) | |
3815 | #define btrfs_notice(fs_info, fmt, args...) \ | |
3816 | btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) | |
3817 | #define btrfs_info(fs_info, fmt, args...) \ | |
3818 | btrfs_printk(fs_info, KERN_INFO fmt, ##args) | |
27a0dd61 FH |
3819 | |
3820 | #ifdef DEBUG | |
c2cf52eb SK |
3821 | #define btrfs_debug(fs_info, fmt, args...) \ |
3822 | btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) | |
27a0dd61 FH |
3823 | #else |
3824 | #define btrfs_debug(fs_info, fmt, args...) \ | |
3825 | no_printk(KERN_DEBUG fmt, ##args) | |
3826 | #endif | |
c2cf52eb | 3827 | |
2e17c7c6 JB |
3828 | #ifdef CONFIG_BTRFS_ASSERT |
3829 | ||
3830 | static inline void assfail(char *expr, char *file, int line) | |
3831 | { | |
3832 | printk(KERN_ERR "BTRFS assertion failed: %s, file: %s, line: %d", | |
3833 | expr, file, line); | |
3834 | BUG(); | |
3835 | } | |
3836 | ||
3837 | #define ASSERT(expr) \ | |
3838 | (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) | |
3839 | #else | |
3840 | #define ASSERT(expr) ((void)0) | |
3841 | #endif | |
3842 | ||
3843 | #define btrfs_assert() | |
533574c6 | 3844 | __printf(5, 6) |
acce952b | 3845 | void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function, |
4da35113 | 3846 | unsigned int line, int errno, const char *fmt, ...); |
acce952b | 3847 | |
533574c6 | 3848 | |
49b25e05 JM |
3849 | void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, |
3850 | struct btrfs_root *root, const char *function, | |
3851 | unsigned int line, int errno); | |
3852 | ||
2b0ce2c2 MH |
3853 | #define btrfs_set_fs_incompat(__fs_info, opt) \ |
3854 | __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) | |
3855 | ||
3856 | static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, | |
3857 | u64 flag) | |
3858 | { | |
3859 | struct btrfs_super_block *disk_super; | |
3860 | u64 features; | |
3861 | ||
3862 | disk_super = fs_info->super_copy; | |
3863 | features = btrfs_super_incompat_flags(disk_super); | |
3864 | if (!(features & flag)) { | |
ceda0864 MX |
3865 | spin_lock(&fs_info->super_lock); |
3866 | features = btrfs_super_incompat_flags(disk_super); | |
3867 | if (!(features & flag)) { | |
3868 | features |= flag; | |
3869 | btrfs_set_super_incompat_flags(disk_super, features); | |
3870 | printk(KERN_INFO "btrfs: setting %llu feature flag\n", | |
3871 | flag); | |
3872 | } | |
3873 | spin_unlock(&fs_info->super_lock); | |
2b0ce2c2 MH |
3874 | } |
3875 | } | |
3876 | ||
3173a18f JB |
3877 | #define btrfs_fs_incompat(fs_info, opt) \ |
3878 | __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) | |
3879 | ||
3880 | static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) | |
3881 | { | |
3882 | struct btrfs_super_block *disk_super; | |
3883 | disk_super = fs_info->super_copy; | |
3884 | return !!(btrfs_super_incompat_flags(disk_super) & flag); | |
3885 | } | |
3886 | ||
005d6427 DS |
3887 | /* |
3888 | * Call btrfs_abort_transaction as early as possible when an error condition is | |
3889 | * detected, that way the exact line number is reported. | |
3890 | */ | |
3891 | ||
49b25e05 JM |
3892 | #define btrfs_abort_transaction(trans, root, errno) \ |
3893 | do { \ | |
3894 | __btrfs_abort_transaction(trans, root, __func__, \ | |
3895 | __LINE__, errno); \ | |
3896 | } while (0) | |
acce952b | 3897 | |
3898 | #define btrfs_std_error(fs_info, errno) \ | |
3899 | do { \ | |
3900 | if ((errno)) \ | |
4da35113 JM |
3901 | __btrfs_std_error((fs_info), __func__, \ |
3902 | __LINE__, (errno), NULL); \ | |
3903 | } while (0) | |
3904 | ||
3905 | #define btrfs_error(fs_info, errno, fmt, args...) \ | |
3906 | do { \ | |
3907 | __btrfs_std_error((fs_info), __func__, __LINE__, \ | |
3908 | (errno), fmt, ##args); \ | |
acce952b | 3909 | } while (0) |
33268eaf | 3910 | |
533574c6 | 3911 | __printf(5, 6) |
8c342930 JM |
3912 | void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, |
3913 | unsigned int line, int errno, const char *fmt, ...); | |
3914 | ||
aa43a17c ES |
3915 | /* |
3916 | * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic | |
3917 | * will panic(). Otherwise we BUG() here. | |
3918 | */ | |
8c342930 JM |
3919 | #define btrfs_panic(fs_info, errno, fmt, args...) \ |
3920 | do { \ | |
aa43a17c ES |
3921 | __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ |
3922 | BUG(); \ | |
acce952b | 3923 | } while (0) |
33268eaf JB |
3924 | |
3925 | /* acl.c */ | |
0eda294d | 3926 | #ifdef CONFIG_BTRFS_FS_POSIX_ACL |
4e34e719 | 3927 | struct posix_acl *btrfs_get_acl(struct inode *inode, int type); |
f34f57a3 YZ |
3928 | int btrfs_init_acl(struct btrfs_trans_handle *trans, |
3929 | struct inode *inode, struct inode *dir); | |
33268eaf | 3930 | int btrfs_acl_chmod(struct inode *inode); |
9b89d95a | 3931 | #else |
ed8f3737 | 3932 | #define btrfs_get_acl NULL |
9b89d95a LZ |
3933 | static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, |
3934 | struct inode *inode, struct inode *dir) | |
3935 | { | |
3936 | return 0; | |
3937 | } | |
3938 | static inline int btrfs_acl_chmod(struct inode *inode) | |
3939 | { | |
3940 | return 0; | |
3941 | } | |
3942 | #endif | |
0f9dd46c | 3943 | |
5d4f98a2 YZ |
3944 | /* relocation.c */ |
3945 | int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start); | |
3946 | int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, | |
3947 | struct btrfs_root *root); | |
3948 | int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, | |
3949 | struct btrfs_root *root); | |
3950 | int btrfs_recover_relocation(struct btrfs_root *root); | |
3951 | int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); | |
83d4cfd4 JB |
3952 | int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, |
3953 | struct btrfs_root *root, struct extent_buffer *buf, | |
3954 | struct extent_buffer *cow); | |
3fd0a558 YZ |
3955 | void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans, |
3956 | struct btrfs_pending_snapshot *pending, | |
3957 | u64 *bytes_to_reserve); | |
49b25e05 | 3958 | int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, |
3fd0a558 | 3959 | struct btrfs_pending_snapshot *pending); |
a2de733c AJ |
3960 | |
3961 | /* scrub.c */ | |
aa1b8cd4 SB |
3962 | int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, |
3963 | u64 end, struct btrfs_scrub_progress *progress, | |
63a212ab | 3964 | int readonly, int is_dev_replace); |
143bede5 | 3965 | void btrfs_scrub_pause(struct btrfs_root *root); |
143bede5 | 3966 | void btrfs_scrub_continue(struct btrfs_root *root); |
aa1b8cd4 SB |
3967 | int btrfs_scrub_cancel(struct btrfs_fs_info *info); |
3968 | int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, | |
3969 | struct btrfs_device *dev); | |
a2de733c AJ |
3970 | int btrfs_scrub_progress(struct btrfs_root *root, u64 devid, |
3971 | struct btrfs_scrub_progress *progress); | |
3972 | ||
7414a03f AJ |
3973 | /* reada.c */ |
3974 | struct reada_control { | |
3975 | struct btrfs_root *root; /* tree to prefetch */ | |
3976 | struct btrfs_key key_start; | |
3977 | struct btrfs_key key_end; /* exclusive */ | |
3978 | atomic_t elems; | |
3979 | struct kref refcnt; | |
3980 | wait_queue_head_t wait; | |
3981 | }; | |
3982 | struct reada_control *btrfs_reada_add(struct btrfs_root *root, | |
3983 | struct btrfs_key *start, struct btrfs_key *end); | |
3984 | int btrfs_reada_wait(void *handle); | |
3985 | void btrfs_reada_detach(void *handle); | |
3986 | int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb, | |
3987 | u64 start, int err); | |
3988 | ||
bed92eae AJ |
3989 | /* qgroup.c */ |
3990 | struct qgroup_update { | |
64947ec0 | 3991 | struct list_head list; |
bed92eae AJ |
3992 | struct btrfs_delayed_ref_node *node; |
3993 | struct btrfs_delayed_extent_op *extent_op; | |
64947ec0 JS |
3994 | }; |
3995 | ||
bed92eae AJ |
3996 | int btrfs_quota_enable(struct btrfs_trans_handle *trans, |
3997 | struct btrfs_fs_info *fs_info); | |
3998 | int btrfs_quota_disable(struct btrfs_trans_handle *trans, | |
3999 | struct btrfs_fs_info *fs_info); | |
2f232036 | 4000 | int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info); |
b382a324 | 4001 | void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info); |
57254b6e | 4002 | int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info); |
bed92eae AJ |
4003 | int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, |
4004 | struct btrfs_fs_info *fs_info, u64 src, u64 dst); | |
4005 | int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, | |
4006 | struct btrfs_fs_info *fs_info, u64 src, u64 dst); | |
4007 | int btrfs_create_qgroup(struct btrfs_trans_handle *trans, | |
4008 | struct btrfs_fs_info *fs_info, u64 qgroupid, | |
4009 | char *name); | |
4010 | int btrfs_remove_qgroup(struct btrfs_trans_handle *trans, | |
4011 | struct btrfs_fs_info *fs_info, u64 qgroupid); | |
4012 | int btrfs_limit_qgroup(struct btrfs_trans_handle *trans, | |
4013 | struct btrfs_fs_info *fs_info, u64 qgroupid, | |
4014 | struct btrfs_qgroup_limit *limit); | |
4015 | int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info); | |
4016 | void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info); | |
4017 | struct btrfs_delayed_extent_op; | |
4018 | int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans, | |
4019 | struct btrfs_delayed_ref_node *node, | |
4020 | struct btrfs_delayed_extent_op *extent_op); | |
4021 | int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans, | |
4022 | struct btrfs_fs_info *fs_info, | |
4023 | struct btrfs_delayed_ref_node *node, | |
4024 | struct btrfs_delayed_extent_op *extent_op); | |
4025 | int btrfs_run_qgroups(struct btrfs_trans_handle *trans, | |
4026 | struct btrfs_fs_info *fs_info); | |
4027 | int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, | |
4028 | struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid, | |
4029 | struct btrfs_qgroup_inherit *inherit); | |
4030 | int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes); | |
4031 | void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes); | |
4032 | ||
4033 | void assert_qgroups_uptodate(struct btrfs_trans_handle *trans); | |
bd989ba3 | 4034 | |
95a06077 JS |
4035 | static inline int is_fstree(u64 rootid) |
4036 | { | |
4037 | if (rootid == BTRFS_FS_TREE_OBJECTID || | |
4038 | (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID) | |
4039 | return 1; | |
4040 | return 0; | |
4041 | } | |
210549eb DS |
4042 | |
4043 | static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) | |
4044 | { | |
4045 | return signal_pending(current); | |
4046 | } | |
4047 | ||
aaedb55b JB |
4048 | /* Sanity test specific functions */ |
4049 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS | |
4050 | void btrfs_test_destroy_inode(struct inode *inode); | |
4051 | #endif | |
210549eb | 4052 | |
eb60ceac | 4053 | #endif |