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6cbd5570 CM |
1 | /* |
2 | * Copyright (C) 2007 Oracle. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public | |
6 | * License v2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public | |
14 | * License along with this program; if not, write to the | |
15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
16 | * Boston, MA 021110-1307, USA. | |
17 | */ | |
18 | ||
dc17ff8f CM |
19 | #ifndef __BTRFS_CTREE__ |
20 | #define __BTRFS_CTREE__ | |
eb60ceac | 21 | |
810191ff CM |
22 | #include <linux/mm.h> |
23 | #include <linux/highmem.h> | |
e20d96d6 | 24 | #include <linux/fs.h> |
a2de733c | 25 | #include <linux/rwsem.h> |
803b2f54 | 26 | #include <linux/semaphore.h> |
58176a96 | 27 | #include <linux/completion.h> |
04160088 | 28 | #include <linux/backing-dev.h> |
e6dcd2dc | 29 | #include <linux/wait.h> |
5a0e3ad6 | 30 | #include <linux/slab.h> |
f8b18087 | 31 | #include <linux/kobject.h> |
1abe9b8a | 32 | #include <trace/events/btrfs.h> |
479965d6 | 33 | #include <asm/kmap_types.h> |
3b16a4e3 | 34 | #include <linux/pagemap.h> |
55e301fd | 35 | #include <linux/btrfs.h> |
21c7e756 | 36 | #include <linux/workqueue.h> |
f667aef6 | 37 | #include <linux/security.h> |
ee22184b | 38 | #include <linux/sizes.h> |
d1310b2e | 39 | #include "extent_io.h" |
5f39d397 | 40 | #include "extent_map.h" |
8b712842 | 41 | #include "async-thread.h" |
e20d96d6 | 42 | |
e089f05c | 43 | struct btrfs_trans_handle; |
79154b1b | 44 | struct btrfs_transaction; |
a22285a6 | 45 | struct btrfs_pending_snapshot; |
35b7e476 CM |
46 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
47 | extern struct kmem_cache *btrfs_transaction_cachep; | |
48 | extern struct kmem_cache *btrfs_bit_radix_cachep; | |
2c90e5d6 | 49 | extern struct kmem_cache *btrfs_path_cachep; |
dc89e982 | 50 | extern struct kmem_cache *btrfs_free_space_cachep; |
e6dcd2dc | 51 | struct btrfs_ordered_sum; |
e089f05c | 52 | |
294e30fe JB |
53 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
54 | #define STATIC noinline | |
55 | #else | |
56 | #define STATIC static noinline | |
57 | #endif | |
58 | ||
cdb4c574 | 59 | #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ |
eb60ceac | 60 | |
72d7aefc | 61 | #define BTRFS_MAX_MIRRORS 3 |
94598ba8 | 62 | |
4008c04a | 63 | #define BTRFS_MAX_LEVEL 8 |
0b86a832 | 64 | |
5d4f98a2 YZ |
65 | #define BTRFS_COMPAT_EXTENT_TREE_V0 |
66 | ||
0b86a832 | 67 | /* holds pointers to all of the tree roots */ |
6407bf6d | 68 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
0b86a832 CM |
69 | |
70 | /* stores information about which extents are in use, and reference counts */ | |
0cf6c620 | 71 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
0b86a832 | 72 | |
0b86a832 CM |
73 | /* |
74 | * chunk tree stores translations from logical -> physical block numbering | |
75 | * the super block points to the chunk tree | |
76 | */ | |
e085def2 | 77 | #define BTRFS_CHUNK_TREE_OBJECTID 3ULL |
0b86a832 CM |
78 | |
79 | /* | |
80 | * stores information about which areas of a given device are in use. | |
81 | * one per device. The tree of tree roots points to the device tree | |
82 | */ | |
e085def2 CM |
83 | #define BTRFS_DEV_TREE_OBJECTID 4ULL |
84 | ||
85 | /* one per subvolume, storing files and directories */ | |
86 | #define BTRFS_FS_TREE_OBJECTID 5ULL | |
87 | ||
88 | /* directory objectid inside the root tree */ | |
89 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL | |
0b86a832 | 90 | |
d20f7043 CM |
91 | /* holds checksums of all the data extents */ |
92 | #define BTRFS_CSUM_TREE_OBJECTID 7ULL | |
93 | ||
630dc772 AJ |
94 | /* holds quota configuration and tracking */ |
95 | #define BTRFS_QUOTA_TREE_OBJECTID 8ULL | |
96 | ||
07b30a49 SB |
97 | /* for storing items that use the BTRFS_UUID_KEY* types */ |
98 | #define BTRFS_UUID_TREE_OBJECTID 9ULL | |
99 | ||
208acb8c OS |
100 | /* tracks free space in block groups. */ |
101 | #define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL | |
102 | ||
242e2956 DS |
103 | /* device stats in the device tree */ |
104 | #define BTRFS_DEV_STATS_OBJECTID 0ULL | |
105 | ||
60b62978 DS |
106 | /* for storing balance parameters in the root tree */ |
107 | #define BTRFS_BALANCE_OBJECTID -4ULL | |
108 | ||
7b128766 JB |
109 | /* orhpan objectid for tracking unlinked/truncated files */ |
110 | #define BTRFS_ORPHAN_OBJECTID -5ULL | |
111 | ||
e02119d5 CM |
112 | /* does write ahead logging to speed up fsyncs */ |
113 | #define BTRFS_TREE_LOG_OBJECTID -6ULL | |
114 | #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL | |
115 | ||
e4657689 ZY |
116 | /* for space balancing */ |
117 | #define BTRFS_TREE_RELOC_OBJECTID -8ULL | |
118 | #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL | |
119 | ||
d20f7043 CM |
120 | /* |
121 | * extent checksums all have this objectid | |
122 | * this allows them to share the logging tree | |
123 | * for fsyncs | |
124 | */ | |
125 | #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL | |
126 | ||
0af3d00b JB |
127 | /* For storing free space cache */ |
128 | #define BTRFS_FREE_SPACE_OBJECTID -11ULL | |
129 | ||
82d5902d | 130 | /* |
527a1361 | 131 | * The inode number assigned to the special inode for storing |
82d5902d LZ |
132 | * free ino cache |
133 | */ | |
134 | #define BTRFS_FREE_INO_OBJECTID -12ULL | |
135 | ||
31840ae1 ZY |
136 | /* dummy objectid represents multiple objectids */ |
137 | #define BTRFS_MULTIPLE_OBJECTIDS -255ULL | |
138 | ||
0b86a832 | 139 | /* |
6527cdbe | 140 | * All files have objectids in this range. |
0b86a832 | 141 | */ |
f6dbff55 | 142 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
6527cdbe | 143 | #define BTRFS_LAST_FREE_OBJECTID -256ULL |
e17cade2 | 144 | #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL |
3768f368 | 145 | |
0b86a832 CM |
146 | |
147 | /* | |
148 | * the device items go into the chunk tree. The key is in the form | |
149 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] | |
150 | */ | |
151 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL | |
152 | ||
4df27c4d YZ |
153 | #define BTRFS_BTREE_INODE_OBJECTID 1 |
154 | ||
155 | #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2 | |
156 | ||
6e71c47a | 157 | #define BTRFS_DEV_REPLACE_DEVID 0ULL |
e93c89c1 | 158 | |
727011e0 CM |
159 | /* |
160 | * the max metadata block size. This limit is somewhat artificial, | |
161 | * but the memmove costs go through the roof for larger blocks. | |
162 | */ | |
163 | #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 | |
164 | ||
e20d96d6 CM |
165 | /* |
166 | * we can actually store much bigger names, but lets not confuse the rest | |
167 | * of linux | |
168 | */ | |
169 | #define BTRFS_NAME_LEN 255 | |
170 | ||
f186373f MF |
171 | /* |
172 | * Theoretical limit is larger, but we keep this down to a sane | |
173 | * value. That should limit greatly the possibility of collisions on | |
174 | * inode ref items. | |
175 | */ | |
176 | #define BTRFS_LINK_MAX 65535U | |
177 | ||
f254e52c CM |
178 | /* 32 bytes in various csum fields */ |
179 | #define BTRFS_CSUM_SIZE 32 | |
607d432d JB |
180 | |
181 | /* csum types */ | |
182 | #define BTRFS_CSUM_TYPE_CRC32 0 | |
183 | ||
4d4ab6d6 | 184 | static const int btrfs_csum_sizes[] = { 4 }; |
607d432d | 185 | |
509659cd | 186 | /* four bytes for CRC32 */ |
3954401f | 187 | #define BTRFS_EMPTY_DIR_SIZE 0 |
f254e52c | 188 | |
29a8d9a0 SB |
189 | /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */ |
190 | #define REQ_GET_READ_MIRRORS (1 << 30) | |
191 | ||
fabb5681 CM |
192 | #define BTRFS_FT_UNKNOWN 0 |
193 | #define BTRFS_FT_REG_FILE 1 | |
194 | #define BTRFS_FT_DIR 2 | |
195 | #define BTRFS_FT_CHRDEV 3 | |
196 | #define BTRFS_FT_BLKDEV 4 | |
197 | #define BTRFS_FT_FIFO 5 | |
198 | #define BTRFS_FT_SOCK 6 | |
199 | #define BTRFS_FT_SYMLINK 7 | |
5103e947 JB |
200 | #define BTRFS_FT_XATTR 8 |
201 | #define BTRFS_FT_MAX 9 | |
fabb5681 | 202 | |
3d136a11 SB |
203 | /* ioprio of readahead is set to idle */ |
204 | #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) | |
205 | ||
ee22184b | 206 | #define BTRFS_DIRTY_METADATA_THRESH SZ_32M |
e2d84521 | 207 | |
ee22184b | 208 | #define BTRFS_MAX_EXTENT_SIZE SZ_128M |
dcab6a3b | 209 | |
fec577fb | 210 | /* |
d4a78947 WF |
211 | * The key defines the order in the tree, and so it also defines (optimal) |
212 | * block layout. | |
213 | * | |
214 | * objectid corresponds to the inode number. | |
215 | * | |
216 | * type tells us things about the object, and is a kind of stream selector. | |
217 | * so for a given inode, keys with type of 1 might refer to the inode data, | |
218 | * type of 2 may point to file data in the btree and type == 3 may point to | |
219 | * extents. | |
fec577fb CM |
220 | * |
221 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
222 | * |
223 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
224 | * in cpu native order. Otherwise they are identical and their sizes | |
225 | * should be the same (ie both packed) | |
fec577fb | 226 | */ |
e2fa7227 CM |
227 | struct btrfs_disk_key { |
228 | __le64 objectid; | |
5f39d397 | 229 | u8 type; |
70b2befd | 230 | __le64 offset; |
e2fa7227 CM |
231 | } __attribute__ ((__packed__)); |
232 | ||
233 | struct btrfs_key { | |
eb60ceac | 234 | u64 objectid; |
5f39d397 | 235 | u8 type; |
70b2befd | 236 | u64 offset; |
eb60ceac CM |
237 | } __attribute__ ((__packed__)); |
238 | ||
0b86a832 CM |
239 | struct btrfs_mapping_tree { |
240 | struct extent_map_tree map_tree; | |
241 | }; | |
242 | ||
0b86a832 CM |
243 | struct btrfs_dev_item { |
244 | /* the internal btrfs device id */ | |
245 | __le64 devid; | |
246 | ||
247 | /* size of the device */ | |
248 | __le64 total_bytes; | |
249 | ||
250 | /* bytes used */ | |
251 | __le64 bytes_used; | |
252 | ||
253 | /* optimal io alignment for this device */ | |
254 | __le32 io_align; | |
255 | ||
256 | /* optimal io width for this device */ | |
257 | __le32 io_width; | |
258 | ||
259 | /* minimal io size for this device */ | |
260 | __le32 sector_size; | |
261 | ||
0b86a832 CM |
262 | /* type and info about this device */ |
263 | __le64 type; | |
264 | ||
2b82032c YZ |
265 | /* expected generation for this device */ |
266 | __le64 generation; | |
267 | ||
c3027eb5 CM |
268 | /* |
269 | * starting byte of this partition on the device, | |
d4a78947 | 270 | * to allow for stripe alignment in the future |
c3027eb5 CM |
271 | */ |
272 | __le64 start_offset; | |
273 | ||
e17cade2 CM |
274 | /* grouping information for allocation decisions */ |
275 | __le32 dev_group; | |
276 | ||
277 | /* seek speed 0-100 where 100 is fastest */ | |
278 | u8 seek_speed; | |
279 | ||
280 | /* bandwidth 0-100 where 100 is fastest */ | |
281 | u8 bandwidth; | |
282 | ||
0d81ba5d | 283 | /* btrfs generated uuid for this device */ |
e17cade2 | 284 | u8 uuid[BTRFS_UUID_SIZE]; |
2b82032c YZ |
285 | |
286 | /* uuid of FS who owns this device */ | |
287 | u8 fsid[BTRFS_UUID_SIZE]; | |
0b86a832 CM |
288 | } __attribute__ ((__packed__)); |
289 | ||
290 | struct btrfs_stripe { | |
291 | __le64 devid; | |
292 | __le64 offset; | |
e17cade2 | 293 | u8 dev_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
294 | } __attribute__ ((__packed__)); |
295 | ||
296 | struct btrfs_chunk { | |
e17cade2 CM |
297 | /* size of this chunk in bytes */ |
298 | __le64 length; | |
299 | ||
300 | /* objectid of the root referencing this chunk */ | |
0b86a832 | 301 | __le64 owner; |
e17cade2 | 302 | |
0b86a832 CM |
303 | __le64 stripe_len; |
304 | __le64 type; | |
305 | ||
306 | /* optimal io alignment for this chunk */ | |
307 | __le32 io_align; | |
308 | ||
309 | /* optimal io width for this chunk */ | |
310 | __le32 io_width; | |
311 | ||
312 | /* minimal io size for this chunk */ | |
313 | __le32 sector_size; | |
314 | ||
315 | /* 2^16 stripes is quite a lot, a second limit is the size of a single | |
316 | * item in the btree | |
317 | */ | |
318 | __le16 num_stripes; | |
321aecc6 CM |
319 | |
320 | /* sub stripes only matter for raid10 */ | |
321 | __le16 sub_stripes; | |
0b86a832 CM |
322 | struct btrfs_stripe stripe; |
323 | /* additional stripes go here */ | |
324 | } __attribute__ ((__packed__)); | |
325 | ||
0af3d00b JB |
326 | #define BTRFS_FREE_SPACE_EXTENT 1 |
327 | #define BTRFS_FREE_SPACE_BITMAP 2 | |
328 | ||
329 | struct btrfs_free_space_entry { | |
330 | __le64 offset; | |
331 | __le64 bytes; | |
332 | u8 type; | |
333 | } __attribute__ ((__packed__)); | |
334 | ||
335 | struct btrfs_free_space_header { | |
336 | struct btrfs_disk_key location; | |
337 | __le64 generation; | |
338 | __le64 num_entries; | |
339 | __le64 num_bitmaps; | |
340 | } __attribute__ ((__packed__)); | |
341 | ||
0b86a832 CM |
342 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) |
343 | { | |
344 | BUG_ON(num_stripes == 0); | |
345 | return sizeof(struct btrfs_chunk) + | |
346 | sizeof(struct btrfs_stripe) * (num_stripes - 1); | |
347 | } | |
348 | ||
5d4f98a2 YZ |
349 | #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) |
350 | #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) | |
acce952b | 351 | |
352 | /* | |
353 | * File system states | |
354 | */ | |
87533c47 | 355 | #define BTRFS_FS_STATE_ERROR 0 |
dc81cdc5 | 356 | #define BTRFS_FS_STATE_REMOUNTING 1 |
08748810 | 357 | #define BTRFS_FS_STATE_TRANS_ABORTED 2 |
c404e0dc | 358 | #define BTRFS_FS_STATE_DEV_REPLACING 3 |
acce952b | 359 | |
87533c47 | 360 | /* Super block flags */ |
acce952b | 361 | /* Errors detected */ |
362 | #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2) | |
363 | ||
5d4f98a2 YZ |
364 | #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32) |
365 | #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33) | |
366 | ||
367 | #define BTRFS_BACKREF_REV_MAX 256 | |
368 | #define BTRFS_BACKREF_REV_SHIFT 56 | |
369 | #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ | |
370 | BTRFS_BACKREF_REV_SHIFT) | |
371 | ||
372 | #define BTRFS_OLD_BACKREF_REV 0 | |
373 | #define BTRFS_MIXED_BACKREF_REV 1 | |
63b10fc4 | 374 | |
fec577fb CM |
375 | /* |
376 | * every tree block (leaf or node) starts with this header. | |
377 | */ | |
bb492bb0 | 378 | struct btrfs_header { |
e17cade2 | 379 | /* these first four must match the super block */ |
f254e52c | 380 | u8 csum[BTRFS_CSUM_SIZE]; |
5f39d397 | 381 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 382 | __le64 bytenr; /* which block this node is supposed to live in */ |
63b10fc4 | 383 | __le64 flags; |
e17cade2 CM |
384 | |
385 | /* allowed to be different from the super from here on down */ | |
386 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; | |
7f5c1516 | 387 | __le64 generation; |
4d775673 | 388 | __le64 owner; |
5f39d397 | 389 | __le32 nritems; |
9a6f11ed | 390 | u8 level; |
eb60ceac CM |
391 | } __attribute__ ((__packed__)); |
392 | ||
5f39d397 | 393 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
d397712b CM |
394 | sizeof(struct btrfs_header)) / \ |
395 | sizeof(struct btrfs_key_ptr)) | |
123abc88 | 396 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
707e8a07 | 397 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize)) |
7ec20afb DS |
398 | #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ |
399 | (offsetof(struct btrfs_file_extent_item, disk_bytenr)) | |
236454df CM |
400 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
401 | sizeof(struct btrfs_item) - \ | |
7ec20afb | 402 | BTRFS_FILE_EXTENT_INLINE_DATA_START) |
f34f57a3 YZ |
403 | #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
404 | sizeof(struct btrfs_item) -\ | |
405 | sizeof(struct btrfs_dir_item)) | |
eb60ceac | 406 | |
0b86a832 CM |
407 | |
408 | /* | |
409 | * this is a very generous portion of the super block, giving us | |
410 | * room to translate 14 chunks with 3 stripes each. | |
411 | */ | |
412 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 | |
413 | ||
af31f5e5 CM |
414 | /* |
415 | * just in case we somehow lose the roots and are not able to mount, | |
416 | * we store an array of the roots from previous transactions | |
417 | * in the super. | |
418 | */ | |
419 | #define BTRFS_NUM_BACKUP_ROOTS 4 | |
420 | struct btrfs_root_backup { | |
421 | __le64 tree_root; | |
422 | __le64 tree_root_gen; | |
423 | ||
424 | __le64 chunk_root; | |
425 | __le64 chunk_root_gen; | |
426 | ||
427 | __le64 extent_root; | |
428 | __le64 extent_root_gen; | |
429 | ||
430 | __le64 fs_root; | |
431 | __le64 fs_root_gen; | |
432 | ||
433 | __le64 dev_root; | |
434 | __le64 dev_root_gen; | |
435 | ||
436 | __le64 csum_root; | |
437 | __le64 csum_root_gen; | |
438 | ||
439 | __le64 total_bytes; | |
440 | __le64 bytes_used; | |
441 | __le64 num_devices; | |
442 | /* future */ | |
d1423248 | 443 | __le64 unused_64[4]; |
af31f5e5 CM |
444 | |
445 | u8 tree_root_level; | |
446 | u8 chunk_root_level; | |
447 | u8 extent_root_level; | |
448 | u8 fs_root_level; | |
449 | u8 dev_root_level; | |
450 | u8 csum_root_level; | |
451 | /* future and to align */ | |
452 | u8 unused_8[10]; | |
453 | } __attribute__ ((__packed__)); | |
454 | ||
fec577fb CM |
455 | /* |
456 | * the super block basically lists the main trees of the FS | |
457 | * it currently lacks any block count etc etc | |
458 | */ | |
234b63a0 | 459 | struct btrfs_super_block { |
f254e52c | 460 | u8 csum[BTRFS_CSUM_SIZE]; |
63b10fc4 | 461 | /* the first 4 fields must match struct btrfs_header */ |
2b82032c | 462 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 463 | __le64 bytenr; /* this block number */ |
63b10fc4 | 464 | __le64 flags; |
e17cade2 CM |
465 | |
466 | /* allowed to be different from the btrfs_header from here own down */ | |
3768f368 | 467 | __le64 magic; |
3768f368 CM |
468 | __le64 generation; |
469 | __le64 root; | |
0b86a832 | 470 | __le64 chunk_root; |
e02119d5 | 471 | __le64 log_root; |
c3027eb5 CM |
472 | |
473 | /* this will help find the new super based on the log root */ | |
474 | __le64 log_root_transid; | |
db94535d CM |
475 | __le64 total_bytes; |
476 | __le64 bytes_used; | |
2e635a27 | 477 | __le64 root_dir_objectid; |
8a4b83cc | 478 | __le64 num_devices; |
5f39d397 CM |
479 | __le32 sectorsize; |
480 | __le32 nodesize; | |
707e8a07 | 481 | __le32 __unused_leafsize; |
87ee04eb | 482 | __le32 stripesize; |
0b86a832 | 483 | __le32 sys_chunk_array_size; |
84234f3a | 484 | __le64 chunk_root_generation; |
f2b636e8 JB |
485 | __le64 compat_flags; |
486 | __le64 compat_ro_flags; | |
487 | __le64 incompat_flags; | |
607d432d | 488 | __le16 csum_type; |
db94535d | 489 | u8 root_level; |
0b86a832 | 490 | u8 chunk_root_level; |
e02119d5 | 491 | u8 log_root_level; |
0d81ba5d | 492 | struct btrfs_dev_item dev_item; |
c3027eb5 | 493 | |
7ae9c09d | 494 | char label[BTRFS_LABEL_SIZE]; |
c3027eb5 | 495 | |
0af3d00b | 496 | __le64 cache_generation; |
26432799 | 497 | __le64 uuid_tree_generation; |
0af3d00b | 498 | |
c3027eb5 | 499 | /* future expansion */ |
26432799 | 500 | __le64 reserved[30]; |
0b86a832 | 501 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
af31f5e5 | 502 | struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; |
cfaa7295 CM |
503 | } __attribute__ ((__packed__)); |
504 | ||
f2b636e8 JB |
505 | /* |
506 | * Compat flags that we support. If any incompat flags are set other than the | |
507 | * ones specified below then we will fail to mount | |
508 | */ | |
5d4f98a2 | 509 | #define BTRFS_FEATURE_COMPAT_SUPP 0ULL |
2eaa055f JM |
510 | #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL |
511 | #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL | |
70f6d82e OS |
512 | |
513 | #define BTRFS_FEATURE_COMPAT_RO_SUPP \ | |
514 | (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE) | |
515 | ||
2eaa055f JM |
516 | #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL |
517 | #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL | |
518 | ||
0af3d00b JB |
519 | #define BTRFS_FEATURE_INCOMPAT_SUPP \ |
520 | (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ | |
67377734 | 521 | BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ |
a6fa6fae | 522 | BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ |
727011e0 | 523 | BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ |
f186373f | 524 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ |
53b381b3 | 525 | BTRFS_FEATURE_INCOMPAT_RAID56 | \ |
3173a18f | 526 | BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ |
16e7549f JB |
527 | BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ |
528 | BTRFS_FEATURE_INCOMPAT_NO_HOLES) | |
f2b636e8 | 529 | |
2eaa055f JM |
530 | #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ |
531 | (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) | |
532 | #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL | |
f2b636e8 | 533 | |
fec577fb | 534 | /* |
62e2749e | 535 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
536 | * the item in the leaf (relative to the start of the data area) |
537 | */ | |
0783fcfc | 538 | struct btrfs_item { |
e2fa7227 | 539 | struct btrfs_disk_key key; |
123abc88 | 540 | __le32 offset; |
5f39d397 | 541 | __le32 size; |
eb60ceac CM |
542 | } __attribute__ ((__packed__)); |
543 | ||
fec577fb CM |
544 | /* |
545 | * leaves have an item area and a data area: | |
546 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
547 | * | |
548 | * The data is separate from the items to get the keys closer together | |
549 | * during searches. | |
550 | */ | |
234b63a0 | 551 | struct btrfs_leaf { |
bb492bb0 | 552 | struct btrfs_header header; |
123abc88 | 553 | struct btrfs_item items[]; |
eb60ceac CM |
554 | } __attribute__ ((__packed__)); |
555 | ||
fec577fb CM |
556 | /* |
557 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
558 | * other blocks | |
559 | */ | |
123abc88 CM |
560 | struct btrfs_key_ptr { |
561 | struct btrfs_disk_key key; | |
562 | __le64 blockptr; | |
74493f7a | 563 | __le64 generation; |
123abc88 CM |
564 | } __attribute__ ((__packed__)); |
565 | ||
234b63a0 | 566 | struct btrfs_node { |
bb492bb0 | 567 | struct btrfs_header header; |
123abc88 | 568 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
569 | } __attribute__ ((__packed__)); |
570 | ||
fec577fb | 571 | /* |
234b63a0 CM |
572 | * btrfs_paths remember the path taken from the root down to the leaf. |
573 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
574 | * to any other levels that are present. |
575 | * | |
576 | * The slots array records the index of the item or block pointer | |
577 | * used while walking the tree. | |
578 | */ | |
e4058b54 | 579 | enum { READA_NONE = 0, READA_BACK, READA_FORWARD }; |
234b63a0 | 580 | struct btrfs_path { |
5f39d397 | 581 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
234b63a0 | 582 | int slots[BTRFS_MAX_LEVEL]; |
925baedd | 583 | /* if there is real range locking, this locks field will change */ |
4fb72bf2 | 584 | u8 locks[BTRFS_MAX_LEVEL]; |
dccabfad | 585 | u8 reada; |
925baedd | 586 | /* keep some upper locks as we walk down */ |
7853f15b | 587 | u8 lowest_level; |
459931ec CM |
588 | |
589 | /* | |
590 | * set by btrfs_split_item, tells search_slot to keep all locks | |
591 | * and to force calls to keep space in the nodes | |
592 | */ | |
b9473439 CM |
593 | unsigned int search_for_split:1; |
594 | unsigned int keep_locks:1; | |
595 | unsigned int skip_locking:1; | |
596 | unsigned int leave_spinning:1; | |
5d4f98a2 | 597 | unsigned int search_commit_root:1; |
3f8a18cc | 598 | unsigned int need_commit_sem:1; |
5f5bc6b1 | 599 | unsigned int skip_release_on_error:1; |
eb60ceac | 600 | }; |
5de08d7d | 601 | |
62e2749e CM |
602 | /* |
603 | * items in the extent btree are used to record the objectid of the | |
604 | * owner of the block and the number of references | |
605 | */ | |
5d4f98a2 | 606 | |
62e2749e | 607 | struct btrfs_extent_item { |
5d4f98a2 YZ |
608 | __le64 refs; |
609 | __le64 generation; | |
610 | __le64 flags; | |
611 | } __attribute__ ((__packed__)); | |
612 | ||
613 | struct btrfs_extent_item_v0 { | |
62e2749e | 614 | __le32 refs; |
74493f7a CM |
615 | } __attribute__ ((__packed__)); |
616 | ||
5d4f98a2 YZ |
617 | #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \ |
618 | sizeof(struct btrfs_item)) | |
619 | ||
620 | #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0) | |
621 | #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1) | |
622 | ||
623 | /* following flags only apply to tree blocks */ | |
624 | ||
625 | /* use full backrefs for extent pointers in the block */ | |
626 | #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8) | |
627 | ||
a2de733c AJ |
628 | /* |
629 | * this flag is only used internally by scrub and may be changed at any time | |
630 | * it is only declared here to avoid collisions | |
631 | */ | |
632 | #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48) | |
633 | ||
5d4f98a2 YZ |
634 | struct btrfs_tree_block_info { |
635 | struct btrfs_disk_key key; | |
636 | u8 level; | |
637 | } __attribute__ ((__packed__)); | |
638 | ||
639 | struct btrfs_extent_data_ref { | |
640 | __le64 root; | |
641 | __le64 objectid; | |
642 | __le64 offset; | |
643 | __le32 count; | |
644 | } __attribute__ ((__packed__)); | |
645 | ||
646 | struct btrfs_shared_data_ref { | |
647 | __le32 count; | |
648 | } __attribute__ ((__packed__)); | |
649 | ||
650 | struct btrfs_extent_inline_ref { | |
651 | u8 type; | |
1bec1aed | 652 | __le64 offset; |
5d4f98a2 YZ |
653 | } __attribute__ ((__packed__)); |
654 | ||
655 | /* old style backrefs item */ | |
656 | struct btrfs_extent_ref_v0 { | |
74493f7a CM |
657 | __le64 root; |
658 | __le64 generation; | |
659 | __le64 objectid; | |
5d4f98a2 | 660 | __le32 count; |
62e2749e CM |
661 | } __attribute__ ((__packed__)); |
662 | ||
5d4f98a2 | 663 | |
0b86a832 CM |
664 | /* dev extents record free space on individual devices. The owner |
665 | * field points back to the chunk allocation mapping tree that allocated | |
e17cade2 | 666 | * the extent. The chunk tree uuid field is a way to double check the owner |
0b86a832 CM |
667 | */ |
668 | struct btrfs_dev_extent { | |
e17cade2 CM |
669 | __le64 chunk_tree; |
670 | __le64 chunk_objectid; | |
671 | __le64 chunk_offset; | |
0b86a832 | 672 | __le64 length; |
e17cade2 | 673 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
674 | } __attribute__ ((__packed__)); |
675 | ||
3954401f | 676 | struct btrfs_inode_ref { |
aec7477b | 677 | __le64 index; |
3954401f CM |
678 | __le16 name_len; |
679 | /* name goes here */ | |
680 | } __attribute__ ((__packed__)); | |
681 | ||
f186373f MF |
682 | struct btrfs_inode_extref { |
683 | __le64 parent_objectid; | |
684 | __le64 index; | |
685 | __le16 name_len; | |
686 | __u8 name[0]; | |
687 | /* name goes here */ | |
688 | } __attribute__ ((__packed__)); | |
689 | ||
0b86a832 | 690 | struct btrfs_timespec { |
f254e52c | 691 | __le64 sec; |
1e1d2701 CM |
692 | __le32 nsec; |
693 | } __attribute__ ((__packed__)); | |
694 | ||
1e1d2701 | 695 | struct btrfs_inode_item { |
e02119d5 | 696 | /* nfs style generation number */ |
1e1d2701 | 697 | __le64 generation; |
e02119d5 CM |
698 | /* transid that last touched this inode */ |
699 | __le64 transid; | |
1e1d2701 | 700 | __le64 size; |
a76a3cd4 | 701 | __le64 nbytes; |
31f3c99b | 702 | __le64 block_group; |
1e1d2701 CM |
703 | __le32 nlink; |
704 | __le32 uid; | |
705 | __le32 gid; | |
706 | __le32 mode; | |
0b86a832 | 707 | __le64 rdev; |
f2b636e8 | 708 | __le64 flags; |
c8b97818 | 709 | |
c3027eb5 CM |
710 | /* modification sequence number for NFS */ |
711 | __le64 sequence; | |
712 | ||
713 | /* | |
714 | * a little future expansion, for more than this we can | |
715 | * just grow the inode item and version it | |
716 | */ | |
717 | __le64 reserved[4]; | |
0b86a832 CM |
718 | struct btrfs_timespec atime; |
719 | struct btrfs_timespec ctime; | |
720 | struct btrfs_timespec mtime; | |
721 | struct btrfs_timespec otime; | |
1e1d2701 CM |
722 | } __attribute__ ((__packed__)); |
723 | ||
e02119d5 CM |
724 | struct btrfs_dir_log_item { |
725 | __le64 end; | |
726 | } __attribute__ ((__packed__)); | |
727 | ||
62e2749e | 728 | struct btrfs_dir_item { |
d6e4a428 | 729 | struct btrfs_disk_key location; |
e02119d5 | 730 | __le64 transid; |
5103e947 | 731 | __le16 data_len; |
a8a2ee0c | 732 | __le16 name_len; |
62e2749e CM |
733 | u8 type; |
734 | } __attribute__ ((__packed__)); | |
735 | ||
b83cc969 LZ |
736 | #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0) |
737 | ||
521e0546 DS |
738 | /* |
739 | * Internal in-memory flag that a subvolume has been marked for deletion but | |
740 | * still visible as a directory | |
741 | */ | |
742 | #define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48) | |
743 | ||
62e2749e | 744 | struct btrfs_root_item { |
d6e4a428 | 745 | struct btrfs_inode_item inode; |
84234f3a | 746 | __le64 generation; |
d6e4a428 | 747 | __le64 root_dirid; |
db94535d CM |
748 | __le64 bytenr; |
749 | __le64 byte_limit; | |
750 | __le64 bytes_used; | |
80ff3856 | 751 | __le64 last_snapshot; |
f2b636e8 | 752 | __le64 flags; |
62e2749e | 753 | __le32 refs; |
5eda7b5e CM |
754 | struct btrfs_disk_key drop_progress; |
755 | u8 drop_level; | |
db94535d | 756 | u8 level; |
8ea05e3a AB |
757 | |
758 | /* | |
759 | * The following fields appear after subvol_uuids+subvol_times | |
760 | * were introduced. | |
761 | */ | |
762 | ||
763 | /* | |
764 | * This generation number is used to test if the new fields are valid | |
bb7ab3b9 | 765 | * and up to date while reading the root item. Every time the root item |
8ea05e3a AB |
766 | * is written out, the "generation" field is copied into this field. If |
767 | * anyone ever mounted the fs with an older kernel, we will have | |
768 | * mismatching generation values here and thus must invalidate the | |
769 | * new fields. See btrfs_update_root and btrfs_find_last_root for | |
770 | * details. | |
771 | * the offset of generation_v2 is also used as the start for the memset | |
772 | * when invalidating the fields. | |
773 | */ | |
774 | __le64 generation_v2; | |
775 | u8 uuid[BTRFS_UUID_SIZE]; | |
776 | u8 parent_uuid[BTRFS_UUID_SIZE]; | |
777 | u8 received_uuid[BTRFS_UUID_SIZE]; | |
778 | __le64 ctransid; /* updated when an inode changes */ | |
779 | __le64 otransid; /* trans when created */ | |
780 | __le64 stransid; /* trans when sent. non-zero for received subvol */ | |
781 | __le64 rtransid; /* trans when received. non-zero for received subvol */ | |
782 | struct btrfs_timespec ctime; | |
783 | struct btrfs_timespec otime; | |
784 | struct btrfs_timespec stime; | |
785 | struct btrfs_timespec rtime; | |
786 | __le64 reserved[8]; /* for future */ | |
9f5fae2f | 787 | } __attribute__ ((__packed__)); |
62e2749e | 788 | |
0660b5af CM |
789 | /* |
790 | * this is used for both forward and backward root refs | |
791 | */ | |
792 | struct btrfs_root_ref { | |
793 | __le64 dirid; | |
794 | __le64 sequence; | |
795 | __le16 name_len; | |
796 | } __attribute__ ((__packed__)); | |
797 | ||
0940ebf6 ID |
798 | struct btrfs_disk_balance_args { |
799 | /* | |
800 | * profiles to operate on, single is denoted by | |
801 | * BTRFS_AVAIL_ALLOC_BIT_SINGLE | |
802 | */ | |
803 | __le64 profiles; | |
804 | ||
bc309467 DS |
805 | /* |
806 | * usage filter | |
807 | * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N' | |
808 | * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max | |
809 | */ | |
810 | union { | |
811 | __le64 usage; | |
812 | struct { | |
813 | __le32 usage_min; | |
814 | __le32 usage_max; | |
815 | }; | |
816 | }; | |
0940ebf6 ID |
817 | |
818 | /* devid filter */ | |
819 | __le64 devid; | |
820 | ||
821 | /* devid subset filter [pstart..pend) */ | |
822 | __le64 pstart; | |
823 | __le64 pend; | |
824 | ||
825 | /* btrfs virtual address space subset filter [vstart..vend) */ | |
826 | __le64 vstart; | |
827 | __le64 vend; | |
828 | ||
829 | /* | |
830 | * profile to convert to, single is denoted by | |
831 | * BTRFS_AVAIL_ALLOC_BIT_SINGLE | |
832 | */ | |
833 | __le64 target; | |
834 | ||
835 | /* BTRFS_BALANCE_ARGS_* */ | |
836 | __le64 flags; | |
837 | ||
12907fc7 DS |
838 | /* |
839 | * BTRFS_BALANCE_ARGS_LIMIT with value 'limit' | |
840 | * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum | |
841 | * and maximum | |
842 | */ | |
843 | union { | |
844 | __le64 limit; | |
845 | struct { | |
846 | __le32 limit_min; | |
847 | __le32 limit_max; | |
848 | }; | |
849 | }; | |
7d824b6f | 850 | |
dee32d0a GAP |
851 | /* |
852 | * Process chunks that cross stripes_min..stripes_max devices, | |
853 | * BTRFS_BALANCE_ARGS_STRIPES_RANGE | |
854 | */ | |
855 | __le32 stripes_min; | |
856 | __le32 stripes_max; | |
857 | ||
858 | __le64 unused[6]; | |
0940ebf6 ID |
859 | } __attribute__ ((__packed__)); |
860 | ||
861 | /* | |
862 | * store balance parameters to disk so that balance can be properly | |
863 | * resumed after crash or unmount | |
864 | */ | |
865 | struct btrfs_balance_item { | |
866 | /* BTRFS_BALANCE_* */ | |
867 | __le64 flags; | |
868 | ||
869 | struct btrfs_disk_balance_args data; | |
870 | struct btrfs_disk_balance_args meta; | |
871 | struct btrfs_disk_balance_args sys; | |
872 | ||
873 | __le64 unused[4]; | |
874 | } __attribute__ ((__packed__)); | |
875 | ||
d899e052 YZ |
876 | #define BTRFS_FILE_EXTENT_INLINE 0 |
877 | #define BTRFS_FILE_EXTENT_REG 1 | |
878 | #define BTRFS_FILE_EXTENT_PREALLOC 2 | |
236454df | 879 | |
9f5fae2f | 880 | struct btrfs_file_extent_item { |
c8b97818 CM |
881 | /* |
882 | * transaction id that created this extent | |
883 | */ | |
71951f35 | 884 | __le64 generation; |
c8b97818 CM |
885 | /* |
886 | * max number of bytes to hold this extent in ram | |
887 | * when we split a compressed extent we can't know how big | |
888 | * each of the resulting pieces will be. So, this is | |
889 | * an upper limit on the size of the extent in ram instead of | |
890 | * an exact limit. | |
891 | */ | |
892 | __le64 ram_bytes; | |
893 | ||
894 | /* | |
895 | * 32 bits for the various ways we might encode the data, | |
896 | * including compression and encryption. If any of these | |
897 | * are set to something a given disk format doesn't understand | |
898 | * it is treated like an incompat flag for reading and writing, | |
899 | * but not for stat. | |
900 | */ | |
901 | u8 compression; | |
902 | u8 encryption; | |
903 | __le16 other_encoding; /* spare for later use */ | |
904 | ||
905 | /* are we inline data or a real extent? */ | |
236454df | 906 | u8 type; |
c8b97818 | 907 | |
9f5fae2f CM |
908 | /* |
909 | * disk space consumed by the extent, checksum blocks are included | |
910 | * in these numbers | |
7ec20afb DS |
911 | * |
912 | * At this offset in the structure, the inline extent data start. | |
9f5fae2f | 913 | */ |
db94535d CM |
914 | __le64 disk_bytenr; |
915 | __le64 disk_num_bytes; | |
9f5fae2f | 916 | /* |
dee26a9f | 917 | * the logical offset in file blocks (no csums) |
9f5fae2f CM |
918 | * this extent record is for. This allows a file extent to point |
919 | * into the middle of an existing extent on disk, sharing it | |
920 | * between two snapshots (useful if some bytes in the middle of the | |
921 | * extent have changed | |
922 | */ | |
923 | __le64 offset; | |
924 | /* | |
c8b97818 CM |
925 | * the logical number of file blocks (no csums included). This |
926 | * always reflects the size uncompressed and without encoding. | |
9f5fae2f | 927 | */ |
db94535d | 928 | __le64 num_bytes; |
c8b97818 | 929 | |
9f5fae2f CM |
930 | } __attribute__ ((__packed__)); |
931 | ||
f254e52c | 932 | struct btrfs_csum_item { |
509659cd | 933 | u8 csum; |
f254e52c CM |
934 | } __attribute__ ((__packed__)); |
935 | ||
733f4fbb SB |
936 | struct btrfs_dev_stats_item { |
937 | /* | |
938 | * grow this item struct at the end for future enhancements and keep | |
939 | * the existing values unchanged | |
940 | */ | |
941 | __le64 values[BTRFS_DEV_STAT_VALUES_MAX]; | |
942 | } __attribute__ ((__packed__)); | |
943 | ||
e922e087 SB |
944 | #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0 |
945 | #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1 | |
946 | #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0 | |
947 | #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1 | |
948 | #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2 | |
949 | #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3 | |
950 | #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4 | |
951 | ||
952 | struct btrfs_dev_replace { | |
953 | u64 replace_state; /* see #define above */ | |
954 | u64 time_started; /* seconds since 1-Jan-1970 */ | |
955 | u64 time_stopped; /* seconds since 1-Jan-1970 */ | |
956 | atomic64_t num_write_errors; | |
957 | atomic64_t num_uncorrectable_read_errors; | |
958 | ||
959 | u64 cursor_left; | |
960 | u64 committed_cursor_left; | |
961 | u64 cursor_left_last_write_of_item; | |
962 | u64 cursor_right; | |
963 | ||
964 | u64 cont_reading_from_srcdev_mode; /* see #define above */ | |
965 | ||
966 | int is_valid; | |
967 | int item_needs_writeback; | |
968 | struct btrfs_device *srcdev; | |
969 | struct btrfs_device *tgtdev; | |
970 | ||
971 | pid_t lock_owner; | |
972 | atomic_t nesting_level; | |
973 | struct mutex lock_finishing_cancel_unmount; | |
73beece9 LB |
974 | rwlock_t lock; |
975 | atomic_t read_locks; | |
976 | atomic_t blocking_readers; | |
977 | wait_queue_head_t read_lock_wq; | |
e922e087 SB |
978 | |
979 | struct btrfs_scrub_progress scrub_progress; | |
980 | }; | |
981 | ||
a2bff640 SB |
982 | struct btrfs_dev_replace_item { |
983 | /* | |
984 | * grow this item struct at the end for future enhancements and keep | |
985 | * the existing values unchanged | |
986 | */ | |
987 | __le64 src_devid; | |
988 | __le64 cursor_left; | |
989 | __le64 cursor_right; | |
990 | __le64 cont_reading_from_srcdev_mode; | |
991 | ||
992 | __le64 replace_state; | |
993 | __le64 time_started; | |
994 | __le64 time_stopped; | |
995 | __le64 num_write_errors; | |
996 | __le64 num_uncorrectable_read_errors; | |
997 | } __attribute__ ((__packed__)); | |
998 | ||
0b86a832 | 999 | /* different types of block groups (and chunks) */ |
52ba6929 ID |
1000 | #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0) |
1001 | #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1) | |
1002 | #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2) | |
1003 | #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3) | |
1004 | #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4) | |
1005 | #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5) | |
1006 | #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6) | |
1c89cdd1 AP |
1007 | #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7) |
1008 | #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8) | |
36523e95 DS |
1009 | #define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \ |
1010 | BTRFS_SPACE_INFO_GLOBAL_RSV) | |
e6ec716f MX |
1011 | |
1012 | enum btrfs_raid_types { | |
1013 | BTRFS_RAID_RAID10, | |
1014 | BTRFS_RAID_RAID1, | |
1015 | BTRFS_RAID_DUP, | |
1016 | BTRFS_RAID_RAID0, | |
1017 | BTRFS_RAID_SINGLE, | |
e942f883 CM |
1018 | BTRFS_RAID_RAID5, |
1019 | BTRFS_RAID_RAID6, | |
e6ec716f MX |
1020 | BTRFS_NR_RAID_TYPES |
1021 | }; | |
52ba6929 ID |
1022 | |
1023 | #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \ | |
1024 | BTRFS_BLOCK_GROUP_SYSTEM | \ | |
1025 | BTRFS_BLOCK_GROUP_METADATA) | |
1026 | ||
1027 | #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \ | |
1028 | BTRFS_BLOCK_GROUP_RAID1 | \ | |
53b381b3 DW |
1029 | BTRFS_BLOCK_GROUP_RAID5 | \ |
1030 | BTRFS_BLOCK_GROUP_RAID6 | \ | |
52ba6929 ID |
1031 | BTRFS_BLOCK_GROUP_DUP | \ |
1032 | BTRFS_BLOCK_GROUP_RAID10) | |
ffe2d203 ZL |
1033 | #define BTRFS_BLOCK_GROUP_RAID56_MASK (BTRFS_BLOCK_GROUP_RAID5 | \ |
1034 | BTRFS_BLOCK_GROUP_RAID6) | |
1035 | ||
a46d11a8 ID |
1036 | /* |
1037 | * We need a bit for restriper to be able to tell when chunks of type | |
1038 | * SINGLE are available. This "extended" profile format is used in | |
1039 | * fs_info->avail_*_alloc_bits (in-memory) and balance item fields | |
1040 | * (on-disk). The corresponding on-disk bit in chunk.type is reserved | |
1041 | * to avoid remappings between two formats in future. | |
1042 | */ | |
1043 | #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48) | |
1044 | ||
36523e95 DS |
1045 | /* |
1046 | * A fake block group type that is used to communicate global block reserve | |
1047 | * size to userspace via the SPACE_INFO ioctl. | |
1048 | */ | |
1049 | #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49) | |
1050 | ||
899c81ea ID |
1051 | #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \ |
1052 | BTRFS_AVAIL_ALLOC_BIT_SINGLE) | |
1053 | ||
1054 | static inline u64 chunk_to_extended(u64 flags) | |
1055 | { | |
1056 | if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0) | |
1057 | flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE; | |
1058 | ||
1059 | return flags; | |
1060 | } | |
1061 | static inline u64 extended_to_chunk(u64 flags) | |
1062 | { | |
1063 | return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE; | |
1064 | } | |
1065 | ||
9078a3e1 CM |
1066 | struct btrfs_block_group_item { |
1067 | __le64 used; | |
0b86a832 CM |
1068 | __le64 chunk_objectid; |
1069 | __le64 flags; | |
9078a3e1 CM |
1070 | } __attribute__ ((__packed__)); |
1071 | ||
208acb8c OS |
1072 | struct btrfs_free_space_info { |
1073 | __le32 extent_count; | |
1074 | __le32 flags; | |
1075 | } __attribute__ ((__packed__)); | |
1076 | ||
1077 | #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0) | |
1078 | ||
8465ecec QW |
1079 | #define BTRFS_QGROUP_LEVEL_SHIFT 48 |
1080 | static inline u64 btrfs_qgroup_level(u64 qgroupid) | |
1081 | { | |
1082 | return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT; | |
1083 | } | |
1084 | ||
630dc772 AJ |
1085 | /* |
1086 | * is subvolume quota turned on? | |
1087 | */ | |
1088 | #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0) | |
1089 | /* | |
2f232036 | 1090 | * RESCAN is set during the initialization phase |
630dc772 | 1091 | */ |
2f232036 | 1092 | #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1) |
630dc772 AJ |
1093 | /* |
1094 | * Some qgroup entries are known to be out of date, | |
1095 | * either because the configuration has changed in a way that | |
1096 | * makes a rescan necessary, or because the fs has been mounted | |
1097 | * with a non-qgroup-aware version. | |
1098 | * Turning qouta off and on again makes it inconsistent, too. | |
1099 | */ | |
1100 | #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2) | |
1101 | ||
1102 | #define BTRFS_QGROUP_STATUS_VERSION 1 | |
1103 | ||
1104 | struct btrfs_qgroup_status_item { | |
1105 | __le64 version; | |
1106 | /* | |
1107 | * the generation is updated during every commit. As older | |
1108 | * versions of btrfs are not aware of qgroups, it will be | |
1109 | * possible to detect inconsistencies by checking the | |
1110 | * generation on mount time | |
1111 | */ | |
1112 | __le64 generation; | |
1113 | ||
1114 | /* flag definitions see above */ | |
1115 | __le64 flags; | |
1116 | ||
1117 | /* | |
1118 | * only used during scanning to record the progress | |
1119 | * of the scan. It contains a logical address | |
1120 | */ | |
2f232036 | 1121 | __le64 rescan; |
630dc772 AJ |
1122 | } __attribute__ ((__packed__)); |
1123 | ||
1124 | struct btrfs_qgroup_info_item { | |
1125 | __le64 generation; | |
1126 | __le64 rfer; | |
1127 | __le64 rfer_cmpr; | |
1128 | __le64 excl; | |
1129 | __le64 excl_cmpr; | |
1130 | } __attribute__ ((__packed__)); | |
1131 | ||
630dc772 AJ |
1132 | struct btrfs_qgroup_limit_item { |
1133 | /* | |
1134 | * only updated when any of the other values change | |
1135 | */ | |
1136 | __le64 flags; | |
1137 | __le64 max_rfer; | |
1138 | __le64 max_excl; | |
1139 | __le64 rsv_rfer; | |
1140 | __le64 rsv_excl; | |
1141 | } __attribute__ ((__packed__)); | |
1142 | ||
c1895442 JM |
1143 | /* For raid type sysfs entries */ |
1144 | struct raid_kobject { | |
1145 | int raid_type; | |
1146 | struct kobject kobj; | |
1147 | }; | |
1148 | ||
6324fbf3 | 1149 | struct btrfs_space_info { |
26b47ff6 | 1150 | spinlock_t lock; |
6a63209f | 1151 | |
89a55897 JB |
1152 | u64 total_bytes; /* total bytes in the space, |
1153 | this doesn't take mirrors into account */ | |
b742bb82 | 1154 | u64 bytes_used; /* total bytes used, |
e9c54999 | 1155 | this doesn't take mirrors into account */ |
6a63209f JB |
1156 | u64 bytes_pinned; /* total bytes pinned, will be freed when the |
1157 | transaction finishes */ | |
1158 | u64 bytes_reserved; /* total bytes the allocator has reserved for | |
1159 | current allocations */ | |
6a63209f | 1160 | u64 bytes_may_use; /* number of bytes that may be used for |
9ed74f2d | 1161 | delalloc/allocations */ |
26b47ff6 MX |
1162 | u64 bytes_readonly; /* total bytes that are read only */ |
1163 | ||
4f4db217 JB |
1164 | u64 max_extent_size; /* This will hold the maximum extent size of |
1165 | the space info if we had an ENOSPC in the | |
1166 | allocator. */ | |
1167 | ||
26b47ff6 MX |
1168 | unsigned int full:1; /* indicates that we cannot allocate any more |
1169 | chunks for this space */ | |
1170 | unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ | |
1171 | ||
1172 | unsigned int flush:1; /* set if we are trying to make space */ | |
1173 | ||
1174 | unsigned int force_alloc; /* set if we need to force a chunk | |
1175 | alloc for this space */ | |
1176 | ||
b742bb82 | 1177 | u64 disk_used; /* total bytes used on disk */ |
89a55897 JB |
1178 | u64 disk_total; /* total bytes on disk, takes mirrors into |
1179 | account */ | |
6a63209f | 1180 | |
26b47ff6 MX |
1181 | u64 flags; |
1182 | ||
b150a4f1 JB |
1183 | /* |
1184 | * bytes_pinned is kept in line with what is actually pinned, as in | |
1185 | * we've called update_block_group and dropped the bytes_used counter | |
1186 | * and increased the bytes_pinned counter. However this means that | |
1187 | * bytes_pinned does not reflect the bytes that will be pinned once the | |
bb7ab3b9 AB |
1188 | * delayed refs are flushed, so this counter is inc'ed every time we |
1189 | * call btrfs_free_extent so it is a realtime count of what will be | |
1190 | * freed once the transaction is committed. It will be zero'ed every | |
1191 | * time the transaction commits. | |
b150a4f1 JB |
1192 | */ |
1193 | struct percpu_counter total_bytes_pinned; | |
1194 | ||
6324fbf3 | 1195 | struct list_head list; |
75c68e9f | 1196 | /* Protected by the spinlock 'lock'. */ |
633c0aad | 1197 | struct list_head ro_bgs; |
0f9dd46c | 1198 | |
26b47ff6 | 1199 | struct rw_semaphore groups_sem; |
0f9dd46c | 1200 | /* for block groups in our same type */ |
b742bb82 | 1201 | struct list_head block_groups[BTRFS_NR_RAID_TYPES]; |
fdb5effd | 1202 | wait_queue_head_t wait; |
6ab0a202 JM |
1203 | |
1204 | struct kobject kobj; | |
c1895442 | 1205 | struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES]; |
0f9dd46c JB |
1206 | }; |
1207 | ||
66d8f3dd MX |
1208 | #define BTRFS_BLOCK_RSV_GLOBAL 1 |
1209 | #define BTRFS_BLOCK_RSV_DELALLOC 2 | |
1210 | #define BTRFS_BLOCK_RSV_TRANS 3 | |
1211 | #define BTRFS_BLOCK_RSV_CHUNK 4 | |
1212 | #define BTRFS_BLOCK_RSV_DELOPS 5 | |
1213 | #define BTRFS_BLOCK_RSV_EMPTY 6 | |
1214 | #define BTRFS_BLOCK_RSV_TEMP 7 | |
1215 | ||
f0486c68 YZ |
1216 | struct btrfs_block_rsv { |
1217 | u64 size; | |
1218 | u64 reserved; | |
f0486c68 | 1219 | struct btrfs_space_info *space_info; |
f0486c68 | 1220 | spinlock_t lock; |
66d8f3dd MX |
1221 | unsigned short full; |
1222 | unsigned short type; | |
1223 | unsigned short failfast; | |
f0486c68 YZ |
1224 | }; |
1225 | ||
fa9c0d79 CM |
1226 | /* |
1227 | * free clusters are used to claim free space in relatively large chunks, | |
1228 | * allowing us to do less seeky writes. They are used for all metadata | |
1229 | * allocations and data allocations in ssd mode. | |
1230 | */ | |
1231 | struct btrfs_free_cluster { | |
1232 | spinlock_t lock; | |
1233 | spinlock_t refill_lock; | |
1234 | struct rb_root root; | |
1235 | ||
1236 | /* largest extent in this cluster */ | |
1237 | u64 max_size; | |
1238 | ||
1239 | /* first extent starting offset */ | |
1240 | u64 window_start; | |
1241 | ||
c759c4e1 JB |
1242 | /* We did a full search and couldn't create a cluster */ |
1243 | bool fragmented; | |
1244 | ||
fa9c0d79 CM |
1245 | struct btrfs_block_group_cache *block_group; |
1246 | /* | |
1247 | * when a cluster is allocated from a block group, we put the | |
1248 | * cluster onto a list in the block group so that it can | |
1249 | * be freed before the block group is freed. | |
1250 | */ | |
1251 | struct list_head block_group_list; | |
6324fbf3 CM |
1252 | }; |
1253 | ||
817d52f8 JB |
1254 | enum btrfs_caching_type { |
1255 | BTRFS_CACHE_NO = 0, | |
1256 | BTRFS_CACHE_STARTED = 1, | |
291c7d2f JB |
1257 | BTRFS_CACHE_FAST = 2, |
1258 | BTRFS_CACHE_FINISHED = 3, | |
36cce922 | 1259 | BTRFS_CACHE_ERROR = 4, |
817d52f8 JB |
1260 | }; |
1261 | ||
0af3d00b JB |
1262 | enum btrfs_disk_cache_state { |
1263 | BTRFS_DC_WRITTEN = 0, | |
1264 | BTRFS_DC_ERROR = 1, | |
1265 | BTRFS_DC_CLEAR = 2, | |
1266 | BTRFS_DC_SETUP = 3, | |
0af3d00b JB |
1267 | }; |
1268 | ||
11833d66 YZ |
1269 | struct btrfs_caching_control { |
1270 | struct list_head list; | |
1271 | struct mutex mutex; | |
1272 | wait_queue_head_t wait; | |
bab39bf9 | 1273 | struct btrfs_work work; |
11833d66 YZ |
1274 | struct btrfs_block_group_cache *block_group; |
1275 | u64 progress; | |
1276 | atomic_t count; | |
1277 | }; | |
1278 | ||
73fa48b6 OS |
1279 | /* Once caching_thread() finds this much free space, it will wake up waiters. */ |
1280 | #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2) | |
1281 | ||
4c6d1d85 CM |
1282 | struct btrfs_io_ctl { |
1283 | void *cur, *orig; | |
1284 | struct page *page; | |
1285 | struct page **pages; | |
1286 | struct btrfs_root *root; | |
c9dc4c65 | 1287 | struct inode *inode; |
4c6d1d85 CM |
1288 | unsigned long size; |
1289 | int index; | |
1290 | int num_pages; | |
c9dc4c65 CM |
1291 | int entries; |
1292 | int bitmaps; | |
4c6d1d85 CM |
1293 | unsigned check_crcs:1; |
1294 | }; | |
1295 | ||
9078a3e1 CM |
1296 | struct btrfs_block_group_cache { |
1297 | struct btrfs_key key; | |
1298 | struct btrfs_block_group_item item; | |
817d52f8 | 1299 | struct btrfs_fs_info *fs_info; |
0af3d00b | 1300 | struct inode *inode; |
c286ac48 | 1301 | spinlock_t lock; |
324ae4df | 1302 | u64 pinned; |
e8569813 | 1303 | u64 reserved; |
e570fd27 | 1304 | u64 delalloc_bytes; |
1b2da372 | 1305 | u64 bytes_super; |
0b86a832 | 1306 | u64 flags; |
5b0e95bf | 1307 | u64 cache_generation; |
a5ed9182 OS |
1308 | u32 sectorsize; |
1309 | ||
1310 | /* | |
1311 | * If the free space extent count exceeds this number, convert the block | |
1312 | * group to bitmaps. | |
1313 | */ | |
1314 | u32 bitmap_high_thresh; | |
1315 | ||
1316 | /* | |
1317 | * If the free space extent count drops below this number, convert the | |
1318 | * block group back to extents. | |
1319 | */ | |
1320 | u32 bitmap_low_thresh; | |
53b381b3 | 1321 | |
e570fd27 MX |
1322 | /* |
1323 | * It is just used for the delayed data space allocation because | |
1324 | * only the data space allocation and the relative metadata update | |
1325 | * can be done cross the transaction. | |
1326 | */ | |
1327 | struct rw_semaphore data_rwsem; | |
1328 | ||
53b381b3 DW |
1329 | /* for raid56, this is a full stripe, without parity */ |
1330 | unsigned long full_stripe_len; | |
1331 | ||
868f401a | 1332 | unsigned int ro; |
0410c94a | 1333 | unsigned int iref:1; |
4f69cb98 | 1334 | unsigned int has_caching_ctl:1; |
04216820 | 1335 | unsigned int removed:1; |
0af3d00b JB |
1336 | |
1337 | int disk_cache_state; | |
0f9dd46c | 1338 | |
817d52f8 | 1339 | /* cache tracking stuff */ |
817d52f8 | 1340 | int cached; |
11833d66 YZ |
1341 | struct btrfs_caching_control *caching_ctl; |
1342 | u64 last_byte_to_unpin; | |
817d52f8 | 1343 | |
0f9dd46c JB |
1344 | struct btrfs_space_info *space_info; |
1345 | ||
1346 | /* free space cache stuff */ | |
34d52cb6 | 1347 | struct btrfs_free_space_ctl *free_space_ctl; |
0f9dd46c JB |
1348 | |
1349 | /* block group cache stuff */ | |
1350 | struct rb_node cache_node; | |
1351 | ||
1352 | /* for block groups in the same raid type */ | |
1353 | struct list_head list; | |
d2fb3437 YZ |
1354 | |
1355 | /* usage count */ | |
1356 | atomic_t count; | |
fa9c0d79 CM |
1357 | |
1358 | /* List of struct btrfs_free_clusters for this block group. | |
1359 | * Today it will only have one thing on it, but that may change | |
1360 | */ | |
1361 | struct list_head cluster_list; | |
ea658bad | 1362 | |
47ab2a6c JB |
1363 | /* For delayed block group creation or deletion of empty block groups */ |
1364 | struct list_head bg_list; | |
633c0aad JB |
1365 | |
1366 | /* For read-only block groups */ | |
1367 | struct list_head ro_list; | |
04216820 FM |
1368 | |
1369 | atomic_t trimming; | |
ce93ec54 JB |
1370 | |
1371 | /* For dirty block groups */ | |
1372 | struct list_head dirty_list; | |
c9dc4c65 CM |
1373 | struct list_head io_list; |
1374 | ||
1375 | struct btrfs_io_ctl io_ctl; | |
a5ed9182 OS |
1376 | |
1377 | /* Lock for free space tree operations. */ | |
1378 | struct mutex free_space_lock; | |
1379 | ||
1380 | /* | |
1381 | * Does the block group need to be added to the free space tree? | |
1382 | * Protected by free_space_lock. | |
1383 | */ | |
1384 | int needs_free_space; | |
9078a3e1 | 1385 | }; |
0b86a832 | 1386 | |
097b8a7c JS |
1387 | /* delayed seq elem */ |
1388 | struct seq_list { | |
1389 | struct list_head list; | |
1390 | u64 seq; | |
1391 | }; | |
1392 | ||
3284da7b DS |
1393 | #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } |
1394 | ||
5d80366e JB |
1395 | enum btrfs_orphan_cleanup_state { |
1396 | ORPHAN_CLEANUP_STARTED = 1, | |
1397 | ORPHAN_CLEANUP_DONE = 2, | |
1398 | }; | |
1399 | ||
53b381b3 DW |
1400 | /* used by the raid56 code to lock stripes for read/modify/write */ |
1401 | struct btrfs_stripe_hash { | |
1402 | struct list_head hash_list; | |
1403 | wait_queue_head_t wait; | |
1404 | spinlock_t lock; | |
1405 | }; | |
1406 | ||
1407 | /* used by the raid56 code to lock stripes for read/modify/write */ | |
1408 | struct btrfs_stripe_hash_table { | |
4ae10b3a CM |
1409 | struct list_head stripe_cache; |
1410 | spinlock_t cache_lock; | |
1411 | int cache_size; | |
1412 | struct btrfs_stripe_hash table[]; | |
53b381b3 DW |
1413 | }; |
1414 | ||
1415 | #define BTRFS_STRIPE_HASH_TABLE_BITS 11 | |
1416 | ||
21c7e756 MX |
1417 | void btrfs_init_async_reclaim_work(struct work_struct *work); |
1418 | ||
097b8a7c | 1419 | /* fs_info */ |
5d4f98a2 | 1420 | struct reloc_control; |
0b86a832 | 1421 | struct btrfs_device; |
8a4b83cc | 1422 | struct btrfs_fs_devices; |
c9e9f97b | 1423 | struct btrfs_balance_control; |
16cdcec7 | 1424 | struct btrfs_delayed_root; |
9f5fae2f | 1425 | struct btrfs_fs_info { |
5f39d397 | 1426 | u8 fsid[BTRFS_FSID_SIZE]; |
e17cade2 | 1427 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
62e2749e CM |
1428 | struct btrfs_root *extent_root; |
1429 | struct btrfs_root *tree_root; | |
0b86a832 CM |
1430 | struct btrfs_root *chunk_root; |
1431 | struct btrfs_root *dev_root; | |
3de4586c | 1432 | struct btrfs_root *fs_root; |
d20f7043 | 1433 | struct btrfs_root *csum_root; |
416ac51d | 1434 | struct btrfs_root *quota_root; |
f7a81ea4 | 1435 | struct btrfs_root *uuid_root; |
a5ed9182 | 1436 | struct btrfs_root *free_space_root; |
e02119d5 CM |
1437 | |
1438 | /* the log root tree is a directory of all the other log roots */ | |
1439 | struct btrfs_root *log_root_tree; | |
4df27c4d YZ |
1440 | |
1441 | spinlock_t fs_roots_radix_lock; | |
0f7d52f4 | 1442 | struct radix_tree_root fs_roots_radix; |
1a5bc167 | 1443 | |
0f9dd46c JB |
1444 | /* block group cache stuff */ |
1445 | spinlock_t block_group_cache_lock; | |
a1897fdd | 1446 | u64 first_logical_byte; |
0f9dd46c JB |
1447 | struct rb_root block_group_cache_tree; |
1448 | ||
2bf64758 JB |
1449 | /* keep track of unallocated space */ |
1450 | spinlock_t free_chunk_lock; | |
1451 | u64 free_chunk_space; | |
1452 | ||
11833d66 YZ |
1453 | struct extent_io_tree freed_extents[2]; |
1454 | struct extent_io_tree *pinned_extents; | |
1a5bc167 | 1455 | |
0b86a832 CM |
1456 | /* logical->physical extent mapping */ |
1457 | struct btrfs_mapping_tree mapping_tree; | |
1458 | ||
16cdcec7 MX |
1459 | /* |
1460 | * block reservation for extent, checksum, root tree and | |
1461 | * delayed dir index item | |
1462 | */ | |
f0486c68 YZ |
1463 | struct btrfs_block_rsv global_block_rsv; |
1464 | /* block reservation for delay allocation */ | |
1465 | struct btrfs_block_rsv delalloc_block_rsv; | |
1466 | /* block reservation for metadata operations */ | |
1467 | struct btrfs_block_rsv trans_block_rsv; | |
1468 | /* block reservation for chunk tree */ | |
1469 | struct btrfs_block_rsv chunk_block_rsv; | |
6d668dda JB |
1470 | /* block reservation for delayed operations */ |
1471 | struct btrfs_block_rsv delayed_block_rsv; | |
f0486c68 YZ |
1472 | |
1473 | struct btrfs_block_rsv empty_block_rsv; | |
1474 | ||
293ffd5f | 1475 | u64 generation; |
15ee9bc7 | 1476 | u64 last_trans_committed; |
0a2b2a84 | 1477 | u64 avg_delayed_ref_runtime; |
12fcfd22 CM |
1478 | |
1479 | /* | |
1480 | * this is updated to the current trans every time a full commit | |
1481 | * is required instead of the faster short fsync log commits | |
1482 | */ | |
1483 | u64 last_trans_log_full_commit; | |
25cd999e | 1484 | unsigned long mount_opt; |
572d9ab7 DS |
1485 | /* |
1486 | * Track requests for actions that need to be done during transaction | |
1487 | * commit (like for some mount options). | |
1488 | */ | |
1489 | unsigned long pending_changes; | |
261507a0 | 1490 | unsigned long compress_type:4; |
8b87dc17 | 1491 | int commit_interval; |
8c6a3ee6 MX |
1492 | /* |
1493 | * It is a suggestive number, the read side is safe even it gets a | |
1494 | * wrong number because we will write out the data into a regular | |
1495 | * extent. The write side(mount/remount) is under ->s_umount lock, | |
1496 | * so it is also safe. | |
1497 | */ | |
6f568d35 | 1498 | u64 max_inline; |
c018daec MX |
1499 | /* |
1500 | * Protected by ->chunk_mutex and sb->s_umount. | |
1501 | * | |
1502 | * The reason that we use two lock to protect it is because only | |
1503 | * remount and mount operations can change it and these two operations | |
1504 | * are under sb->s_umount, but the read side (chunk allocation) can not | |
1505 | * acquire sb->s_umount or the deadlock would happen. So we use two | |
1506 | * locks to protect it. On the write side, we must acquire two locks, | |
1507 | * and on the read side, we just need acquire one of them. | |
1508 | */ | |
8f662a76 | 1509 | u64 alloc_start; |
79154b1b | 1510 | struct btrfs_transaction *running_transaction; |
e6dcd2dc | 1511 | wait_queue_head_t transaction_throttle; |
f9295749 | 1512 | wait_queue_head_t transaction_wait; |
bb9c12c9 | 1513 | wait_queue_head_t transaction_blocked_wait; |
771ed689 | 1514 | wait_queue_head_t async_submit_wait; |
e02119d5 | 1515 | |
ceda0864 MX |
1516 | /* |
1517 | * Used to protect the incompat_flags, compat_flags, compat_ro_flags | |
1518 | * when they are updated. | |
1519 | * | |
1520 | * Because we do not clear the flags for ever, so we needn't use | |
1521 | * the lock on the read side. | |
1522 | * | |
1523 | * We also needn't use the lock when we mount the fs, because | |
1524 | * there is no other task which will update the flag. | |
1525 | */ | |
1526 | spinlock_t super_lock; | |
6c41761f DS |
1527 | struct btrfs_super_block *super_copy; |
1528 | struct btrfs_super_block *super_for_commit; | |
0b86a832 | 1529 | struct block_device *__bdev; |
e20d96d6 | 1530 | struct super_block *sb; |
d98237b3 | 1531 | struct inode *btree_inode; |
04160088 | 1532 | struct backing_dev_info bdi; |
e02119d5 | 1533 | struct mutex tree_log_mutex; |
a74a4b97 CM |
1534 | struct mutex transaction_kthread_mutex; |
1535 | struct mutex cleaner_mutex; | |
925baedd | 1536 | struct mutex chunk_mutex; |
7d9eb12c | 1537 | struct mutex volume_mutex; |
53b381b3 | 1538 | |
1bbc621e CM |
1539 | /* |
1540 | * this is taken to make sure we don't set block groups ro after | |
1541 | * the free space cache has been allocated on them | |
1542 | */ | |
1543 | struct mutex ro_block_group_mutex; | |
1544 | ||
53b381b3 DW |
1545 | /* this is used during read/modify/write to make sure |
1546 | * no two ios are trying to mod the same stripe at the same | |
1547 | * time | |
1548 | */ | |
1549 | struct btrfs_stripe_hash_table *stripe_hash_table; | |
1550 | ||
5a3f23d5 CM |
1551 | /* |
1552 | * this protects the ordered operations list only while we are | |
1553 | * processing all of the entries on it. This way we make | |
1554 | * sure the commit code doesn't find the list temporarily empty | |
1555 | * because another function happens to be doing non-waiting preflush | |
1556 | * before jumping into the main commit. | |
1557 | */ | |
1558 | struct mutex ordered_operations_mutex; | |
9ffba8cd | 1559 | |
9e351cc8 | 1560 | struct rw_semaphore commit_root_sem; |
5a3f23d5 | 1561 | |
c71bf099 | 1562 | struct rw_semaphore cleanup_work_sem; |
76dda93c | 1563 | |
c71bf099 | 1564 | struct rw_semaphore subvol_sem; |
76dda93c YZ |
1565 | struct srcu_struct subvol_srcu; |
1566 | ||
a4abeea4 | 1567 | spinlock_t trans_lock; |
7585717f CM |
1568 | /* |
1569 | * the reloc mutex goes with the trans lock, it is taken | |
1570 | * during commit to protect us from the relocation code | |
1571 | */ | |
1572 | struct mutex reloc_mutex; | |
1573 | ||
8fd17795 | 1574 | struct list_head trans_list; |
facda1e7 | 1575 | struct list_head dead_roots; |
11833d66 | 1576 | struct list_head caching_block_groups; |
e02119d5 | 1577 | |
24bbcf04 YZ |
1578 | spinlock_t delayed_iput_lock; |
1579 | struct list_head delayed_iputs; | |
c2d6cb16 | 1580 | struct mutex cleaner_delayed_iput_mutex; |
24bbcf04 | 1581 | |
f29021b2 JS |
1582 | /* this protects tree_mod_seq_list */ |
1583 | spinlock_t tree_mod_seq_lock; | |
fc36ed7e | 1584 | atomic64_t tree_mod_seq; |
f29021b2 JS |
1585 | struct list_head tree_mod_seq_list; |
1586 | ||
1587 | /* this protects tree_mod_log */ | |
1588 | rwlock_t tree_mod_log_lock; | |
1589 | struct rb_root tree_mod_log; | |
1590 | ||
cb03c743 | 1591 | atomic_t nr_async_submits; |
8c8bee1d | 1592 | atomic_t async_submit_draining; |
0986fe9e | 1593 | atomic_t nr_async_bios; |
771ed689 | 1594 | atomic_t async_delalloc_pages; |
a4abeea4 | 1595 | atomic_t open_ioctl_trans; |
ce9adaa5 | 1596 | |
3eaa2885 | 1597 | /* |
199c2a9c | 1598 | * this is used to protect the following list -- ordered_roots. |
3eaa2885 | 1599 | */ |
199c2a9c | 1600 | spinlock_t ordered_root_lock; |
5a3f23d5 CM |
1601 | |
1602 | /* | |
199c2a9c MX |
1603 | * all fs/file tree roots in which there are data=ordered extents |
1604 | * pending writeback are added into this list. | |
1605 | * | |
5a3f23d5 CM |
1606 | * these can span multiple transactions and basically include |
1607 | * every dirty data page that isn't from nodatacow | |
1608 | */ | |
199c2a9c | 1609 | struct list_head ordered_roots; |
5a3f23d5 | 1610 | |
573bfb72 | 1611 | struct mutex delalloc_root_mutex; |
eb73c1b7 MX |
1612 | spinlock_t delalloc_root_lock; |
1613 | /* all fs/file tree roots that have delalloc inodes. */ | |
1614 | struct list_head delalloc_roots; | |
3eaa2885 | 1615 | |
8b712842 CM |
1616 | /* |
1617 | * there is a pool of worker threads for checksumming during writes | |
1618 | * and a pool for checksumming after reads. This is because readers | |
1619 | * can run with FS locks held, and the writers may be waiting for | |
1620 | * those locks. We don't want ordering in the pending list to cause | |
1621 | * deadlocks, and so the two are serviced separately. | |
1cc127b5 CM |
1622 | * |
1623 | * A third pool does submit_bio to avoid deadlocking with the other | |
1624 | * two | |
8b712842 | 1625 | */ |
d458b054 QW |
1626 | struct btrfs_workqueue *workers; |
1627 | struct btrfs_workqueue *delalloc_workers; | |
1628 | struct btrfs_workqueue *flush_workers; | |
1629 | struct btrfs_workqueue *endio_workers; | |
1630 | struct btrfs_workqueue *endio_meta_workers; | |
1631 | struct btrfs_workqueue *endio_raid56_workers; | |
8b110e39 | 1632 | struct btrfs_workqueue *endio_repair_workers; |
d458b054 QW |
1633 | struct btrfs_workqueue *rmw_workers; |
1634 | struct btrfs_workqueue *endio_meta_write_workers; | |
1635 | struct btrfs_workqueue *endio_write_workers; | |
1636 | struct btrfs_workqueue *endio_freespace_worker; | |
1637 | struct btrfs_workqueue *submit_workers; | |
1638 | struct btrfs_workqueue *caching_workers; | |
1639 | struct btrfs_workqueue *readahead_workers; | |
bab39bf9 | 1640 | |
247e743c CM |
1641 | /* |
1642 | * fixup workers take dirty pages that didn't properly go through | |
1643 | * the cow mechanism and make them safe to write. It happens | |
1644 | * for the sys_munmap function call path | |
1645 | */ | |
d458b054 QW |
1646 | struct btrfs_workqueue *fixup_workers; |
1647 | struct btrfs_workqueue *delayed_workers; | |
a79b7d4b CM |
1648 | |
1649 | /* the extent workers do delayed refs on the extent allocation tree */ | |
1650 | struct btrfs_workqueue *extent_workers; | |
a74a4b97 CM |
1651 | struct task_struct *transaction_kthread; |
1652 | struct task_struct *cleaner_kthread; | |
4543df7e | 1653 | int thread_pool_size; |
8b712842 | 1654 | |
6ab0a202 | 1655 | struct kobject *space_info_kobj; |
e66f709b | 1656 | int do_barriers; |
facda1e7 | 1657 | int closing; |
e02119d5 | 1658 | int log_root_recovering; |
47ab2a6c | 1659 | int open; |
9f5fae2f | 1660 | |
324ae4df | 1661 | u64 total_pinned; |
b9473439 | 1662 | |
e2d84521 MX |
1663 | /* used to keep from writing metadata until there is a nice batch */ |
1664 | struct percpu_counter dirty_metadata_bytes; | |
963d678b | 1665 | struct percpu_counter delalloc_bytes; |
e2d84521 | 1666 | s32 dirty_metadata_batch; |
963d678b MX |
1667 | s32 delalloc_batch; |
1668 | ||
0b86a832 CM |
1669 | struct list_head dirty_cowonly_roots; |
1670 | ||
8a4b83cc | 1671 | struct btrfs_fs_devices *fs_devices; |
4184ea7f CM |
1672 | |
1673 | /* | |
1674 | * the space_info list is almost entirely read only. It only changes | |
1675 | * when we add a new raid type to the FS, and that happens | |
1676 | * very rarely. RCU is used to protect it. | |
1677 | */ | |
6324fbf3 | 1678 | struct list_head space_info; |
4184ea7f | 1679 | |
b4d7c3c9 LZ |
1680 | struct btrfs_space_info *data_sinfo; |
1681 | ||
5d4f98a2 YZ |
1682 | struct reloc_control *reloc_ctl; |
1683 | ||
fa9c0d79 CM |
1684 | /* data_alloc_cluster is only used in ssd mode */ |
1685 | struct btrfs_free_cluster data_alloc_cluster; | |
1686 | ||
1687 | /* all metadata allocations go through this cluster */ | |
1688 | struct btrfs_free_cluster meta_alloc_cluster; | |
d18a2c44 | 1689 | |
4cb5300b CM |
1690 | /* auto defrag inodes go here */ |
1691 | spinlock_t defrag_inodes_lock; | |
1692 | struct rb_root defrag_inodes; | |
1693 | atomic_t defrag_running; | |
1694 | ||
de98ced9 MX |
1695 | /* Used to protect avail_{data, metadata, system}_alloc_bits */ |
1696 | seqlock_t profiles_lock; | |
a46d11a8 ID |
1697 | /* |
1698 | * these three are in extended format (availability of single | |
1699 | * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other | |
1700 | * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) | |
1701 | */ | |
d18a2c44 CM |
1702 | u64 avail_data_alloc_bits; |
1703 | u64 avail_metadata_alloc_bits; | |
1704 | u64 avail_system_alloc_bits; | |
788f20eb | 1705 | |
c9e9f97b ID |
1706 | /* restriper state */ |
1707 | spinlock_t balance_lock; | |
1708 | struct mutex balance_mutex; | |
837d5b6e ID |
1709 | atomic_t balance_running; |
1710 | atomic_t balance_pause_req; | |
a7e99c69 | 1711 | atomic_t balance_cancel_req; |
c9e9f97b | 1712 | struct btrfs_balance_control *balance_ctl; |
837d5b6e | 1713 | wait_queue_head_t balance_wait_q; |
c9e9f97b | 1714 | |
97e728d4 JB |
1715 | unsigned data_chunk_allocations; |
1716 | unsigned metadata_ratio; | |
1717 | ||
788f20eb | 1718 | void *bdev_holder; |
acce952b | 1719 | |
a2de733c AJ |
1720 | /* private scrub information */ |
1721 | struct mutex scrub_lock; | |
1722 | atomic_t scrubs_running; | |
1723 | atomic_t scrub_pause_req; | |
1724 | atomic_t scrubs_paused; | |
1725 | atomic_t scrub_cancel_req; | |
1726 | wait_queue_head_t scrub_pause_wait; | |
a2de733c | 1727 | int scrub_workers_refcnt; |
d458b054 QW |
1728 | struct btrfs_workqueue *scrub_workers; |
1729 | struct btrfs_workqueue *scrub_wr_completion_workers; | |
1730 | struct btrfs_workqueue *scrub_nocow_workers; | |
20b2e302 | 1731 | struct btrfs_workqueue *scrub_parity_workers; |
a2de733c | 1732 | |
21adbd5c SB |
1733 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
1734 | u32 check_integrity_print_mask; | |
1735 | #endif | |
416ac51d AJ |
1736 | /* |
1737 | * quota information | |
1738 | */ | |
1739 | unsigned int quota_enabled:1; | |
1740 | ||
1741 | /* | |
1742 | * quota_enabled only changes state after a commit. This holds the | |
1743 | * next state. | |
1744 | */ | |
1745 | unsigned int pending_quota_state:1; | |
1746 | ||
1747 | /* is qgroup tracking in a consistent state? */ | |
1748 | u64 qgroup_flags; | |
1749 | ||
1750 | /* holds configuration and tracking. Protected by qgroup_lock */ | |
1751 | struct rb_root qgroup_tree; | |
fcebe456 | 1752 | struct rb_root qgroup_op_tree; |
416ac51d | 1753 | spinlock_t qgroup_lock; |
fcebe456 JB |
1754 | spinlock_t qgroup_op_lock; |
1755 | atomic_t qgroup_op_seq; | |
416ac51d | 1756 | |
1e8f9158 WS |
1757 | /* |
1758 | * used to avoid frequently calling ulist_alloc()/ulist_free() | |
1759 | * when doing qgroup accounting, it must be protected by qgroup_lock. | |
1760 | */ | |
1761 | struct ulist *qgroup_ulist; | |
1762 | ||
f2f6ed3d WS |
1763 | /* protect user change for quota operations */ |
1764 | struct mutex qgroup_ioctl_lock; | |
1765 | ||
416ac51d AJ |
1766 | /* list of dirty qgroups to be written at next commit */ |
1767 | struct list_head dirty_qgroups; | |
1768 | ||
e69bcee3 | 1769 | /* used by qgroup for an efficient tree traversal */ |
416ac51d | 1770 | u64 qgroup_seq; |
21adbd5c | 1771 | |
2f232036 JS |
1772 | /* qgroup rescan items */ |
1773 | struct mutex qgroup_rescan_lock; /* protects the progress item */ | |
1774 | struct btrfs_key qgroup_rescan_progress; | |
d458b054 | 1775 | struct btrfs_workqueue *qgroup_rescan_workers; |
57254b6e | 1776 | struct completion qgroup_rescan_completion; |
b382a324 | 1777 | struct btrfs_work qgroup_rescan_work; |
2f232036 | 1778 | |
acce952b | 1779 | /* filesystem state */ |
87533c47 | 1780 | unsigned long fs_state; |
16cdcec7 MX |
1781 | |
1782 | struct btrfs_delayed_root *delayed_root; | |
af31f5e5 | 1783 | |
90519d66 AJ |
1784 | /* readahead tree */ |
1785 | spinlock_t reada_lock; | |
1786 | struct radix_tree_root reada_tree; | |
531f4b1a | 1787 | |
2fefd558 ZL |
1788 | /* readahead works cnt */ |
1789 | atomic_t reada_works_cnt; | |
1790 | ||
f28491e0 JB |
1791 | /* Extent buffer radix tree */ |
1792 | spinlock_t buffer_lock; | |
1793 | struct radix_tree_root buffer_radix; | |
1794 | ||
af31f5e5 CM |
1795 | /* next backup root to be overwritten */ |
1796 | int backup_root_index; | |
5af3e8cc SB |
1797 | |
1798 | int num_tolerated_disk_barrier_failures; | |
e922e087 SB |
1799 | |
1800 | /* device replace state */ | |
1801 | struct btrfs_dev_replace dev_replace; | |
5ac00add SB |
1802 | |
1803 | atomic_t mutually_exclusive_operation_running; | |
803b2f54 | 1804 | |
c404e0dc MX |
1805 | struct percpu_counter bio_counter; |
1806 | wait_queue_head_t replace_wait; | |
1807 | ||
803b2f54 | 1808 | struct semaphore uuid_tree_rescan_sem; |
70f80175 | 1809 | unsigned int update_uuid_tree_gen:1; |
21c7e756 MX |
1810 | |
1811 | /* Used to reclaim the metadata space in the background. */ | |
1812 | struct work_struct async_reclaim_work; | |
47ab2a6c JB |
1813 | |
1814 | spinlock_t unused_bgs_lock; | |
1815 | struct list_head unused_bgs; | |
d4b450cd | 1816 | struct mutex unused_bg_unpin_mutex; |
67c5e7d4 | 1817 | struct mutex delete_unused_bgs_mutex; |
f667aef6 QW |
1818 | |
1819 | /* For btrfs to record security options */ | |
1820 | struct security_mnt_opts security_opts; | |
04216820 FM |
1821 | |
1822 | /* | |
1823 | * Chunks that can't be freed yet (under a trim/discard operation) | |
1824 | * and will be latter freed. Protected by fs_info->chunk_mutex. | |
1825 | */ | |
1826 | struct list_head pinned_chunks; | |
511711af CM |
1827 | |
1828 | int creating_free_space_tree; | |
324ae4df | 1829 | }; |
0b86a832 | 1830 | |
8257b2dc MX |
1831 | struct btrfs_subvolume_writers { |
1832 | struct percpu_counter counter; | |
1833 | wait_queue_head_t wait; | |
1834 | }; | |
1835 | ||
27cdeb70 MX |
1836 | /* |
1837 | * The state of btrfs root | |
1838 | */ | |
1839 | /* | |
1840 | * btrfs_record_root_in_trans is a multi-step process, | |
1841 | * and it can race with the balancing code. But the | |
1842 | * race is very small, and only the first time the root | |
1843 | * is added to each transaction. So IN_TRANS_SETUP | |
1844 | * is used to tell us when more checks are required | |
1845 | */ | |
1846 | #define BTRFS_ROOT_IN_TRANS_SETUP 0 | |
1847 | #define BTRFS_ROOT_REF_COWS 1 | |
1848 | #define BTRFS_ROOT_TRACK_DIRTY 2 | |
1849 | #define BTRFS_ROOT_IN_RADIX 3 | |
1850 | #define BTRFS_ROOT_DUMMY_ROOT 4 | |
1851 | #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5 | |
1852 | #define BTRFS_ROOT_DEFRAG_RUNNING 6 | |
1853 | #define BTRFS_ROOT_FORCE_COW 7 | |
1854 | #define BTRFS_ROOT_MULTI_LOG_TASKS 8 | |
e7070be1 | 1855 | #define BTRFS_ROOT_DIRTY 9 |
27cdeb70 | 1856 | |
9f5fae2f CM |
1857 | /* |
1858 | * in ram representation of the tree. extent_root is used for all allocations | |
f2458e1d | 1859 | * and for the extent tree extent_root root. |
9f5fae2f CM |
1860 | */ |
1861 | struct btrfs_root { | |
5f39d397 | 1862 | struct extent_buffer *node; |
925baedd | 1863 | |
5f39d397 | 1864 | struct extent_buffer *commit_root; |
e02119d5 | 1865 | struct btrfs_root *log_root; |
1a40e23b | 1866 | struct btrfs_root *reloc_root; |
31153d81 | 1867 | |
27cdeb70 | 1868 | unsigned long state; |
62e2749e CM |
1869 | struct btrfs_root_item root_item; |
1870 | struct btrfs_key root_key; | |
9f5fae2f | 1871 | struct btrfs_fs_info *fs_info; |
d0c803c4 CM |
1872 | struct extent_io_tree dirty_log_pages; |
1873 | ||
a2135011 | 1874 | struct mutex objectid_mutex; |
7237f183 | 1875 | |
f0486c68 YZ |
1876 | spinlock_t accounting_lock; |
1877 | struct btrfs_block_rsv *block_rsv; | |
1878 | ||
581bb050 | 1879 | /* free ino cache stuff */ |
581bb050 | 1880 | struct btrfs_free_space_ctl *free_ino_ctl; |
57cdc8db DS |
1881 | enum btrfs_caching_type ino_cache_state; |
1882 | spinlock_t ino_cache_lock; | |
1883 | wait_queue_head_t ino_cache_wait; | |
581bb050 | 1884 | struct btrfs_free_space_ctl *free_ino_pinned; |
57cdc8db DS |
1885 | u64 ino_cache_progress; |
1886 | struct inode *ino_cache_inode; | |
581bb050 | 1887 | |
e02119d5 | 1888 | struct mutex log_mutex; |
7237f183 YZ |
1889 | wait_queue_head_t log_writer_wait; |
1890 | wait_queue_head_t log_commit_wait[2]; | |
8b050d35 | 1891 | struct list_head log_ctxs[2]; |
7237f183 YZ |
1892 | atomic_t log_writers; |
1893 | atomic_t log_commit[2]; | |
2ecb7923 | 1894 | atomic_t log_batch; |
bb14a59b | 1895 | int log_transid; |
d1433deb MX |
1896 | /* No matter the commit succeeds or not*/ |
1897 | int log_transid_committed; | |
1898 | /* Just be updated when the commit succeeds. */ | |
bb14a59b | 1899 | int last_log_commit; |
ff782e0a | 1900 | pid_t log_start_pid; |
ea8c2819 | 1901 | |
0f7d52f4 CM |
1902 | u64 objectid; |
1903 | u64 last_trans; | |
5f39d397 CM |
1904 | |
1905 | /* data allocations are done in sectorsize units */ | |
1906 | u32 sectorsize; | |
1907 | ||
1908 | /* node allocations are done in nodesize units */ | |
1909 | u32 nodesize; | |
1910 | ||
87ee04eb CM |
1911 | u32 stripesize; |
1912 | ||
9f5fae2f | 1913 | u32 type; |
13a8a7c8 YZ |
1914 | |
1915 | u64 highest_objectid; | |
7585717f | 1916 | |
0d4cf4e6 | 1917 | /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */ |
faa2dbf0 | 1918 | u64 alloc_bytenr; |
faa2dbf0 | 1919 | |
3f157a2f | 1920 | u64 defrag_trans_start; |
6702ed49 | 1921 | struct btrfs_key defrag_progress; |
0ef3e66b | 1922 | struct btrfs_key defrag_max; |
58176a96 | 1923 | char *name; |
0b86a832 CM |
1924 | |
1925 | /* the dirty list is only used by non-reference counted roots */ | |
1926 | struct list_head dirty_list; | |
7b128766 | 1927 | |
5d4f98a2 YZ |
1928 | struct list_head root_list; |
1929 | ||
2ab28f32 JB |
1930 | spinlock_t log_extents_lock[2]; |
1931 | struct list_head logged_list[2]; | |
1932 | ||
d68fc57b | 1933 | spinlock_t orphan_lock; |
8a35d95f | 1934 | atomic_t orphan_inodes; |
d68fc57b | 1935 | struct btrfs_block_rsv *orphan_block_rsv; |
d68fc57b | 1936 | int orphan_cleanup_state; |
3394e160 | 1937 | |
5d4f98a2 YZ |
1938 | spinlock_t inode_lock; |
1939 | /* red-black tree that keeps track of in-memory inodes */ | |
1940 | struct rb_root inode_tree; | |
1941 | ||
16cdcec7 MX |
1942 | /* |
1943 | * radix tree that keeps track of delayed nodes of every inode, | |
1944 | * protected by inode_lock | |
1945 | */ | |
1946 | struct radix_tree_root delayed_nodes_tree; | |
3394e160 CM |
1947 | /* |
1948 | * right now this just gets used so that a root has its own devid | |
1949 | * for stat. It may be used for more later | |
1950 | */ | |
0ee5dc67 | 1951 | dev_t anon_dev; |
f1ebcc74 | 1952 | |
5f3ab90a | 1953 | spinlock_t root_item_lock; |
b0feb9d9 | 1954 | atomic_t refs; |
eb73c1b7 | 1955 | |
573bfb72 | 1956 | struct mutex delalloc_mutex; |
eb73c1b7 MX |
1957 | spinlock_t delalloc_lock; |
1958 | /* | |
1959 | * all of the inodes that have delalloc bytes. It is possible for | |
1960 | * this list to be empty even when there is still dirty data=ordered | |
1961 | * extents waiting to finish IO. | |
1962 | */ | |
1963 | struct list_head delalloc_inodes; | |
1964 | struct list_head delalloc_root; | |
1965 | u64 nr_delalloc_inodes; | |
31f3d255 MX |
1966 | |
1967 | struct mutex ordered_extent_mutex; | |
199c2a9c MX |
1968 | /* |
1969 | * this is used by the balancing code to wait for all the pending | |
1970 | * ordered extents | |
1971 | */ | |
1972 | spinlock_t ordered_extent_lock; | |
1973 | ||
1974 | /* | |
1975 | * all of the data=ordered extents pending writeback | |
1976 | * these can span multiple transactions and basically include | |
1977 | * every dirty data page that isn't from nodatacow | |
1978 | */ | |
1979 | struct list_head ordered_extents; | |
1980 | struct list_head ordered_root; | |
1981 | u64 nr_ordered_extents; | |
2c686537 DS |
1982 | |
1983 | /* | |
1984 | * Number of currently running SEND ioctls to prevent | |
1985 | * manipulation with the read-only status via SUBVOL_SETFLAGS | |
1986 | */ | |
1987 | int send_in_progress; | |
8257b2dc MX |
1988 | struct btrfs_subvolume_writers *subv_writers; |
1989 | atomic_t will_be_snapshoted; | |
55eeaf05 QW |
1990 | |
1991 | /* For qgroup metadata space reserve */ | |
1992 | atomic_t qgroup_meta_rsv; | |
62e2749e CM |
1993 | }; |
1994 | ||
4cb5300b | 1995 | |
1e1d2701 CM |
1996 | /* |
1997 | * inode items have the data typically returned from stat and store other | |
1998 | * info about object characteristics. There is one for every file and dir in | |
1999 | * the FS | |
2000 | */ | |
9078a3e1 | 2001 | #define BTRFS_INODE_ITEM_KEY 1 |
0660b5af | 2002 | #define BTRFS_INODE_REF_KEY 12 |
f186373f | 2003 | #define BTRFS_INODE_EXTREF_KEY 13 |
0660b5af CM |
2004 | #define BTRFS_XATTR_ITEM_KEY 24 |
2005 | #define BTRFS_ORPHAN_ITEM_KEY 48 | |
9078a3e1 | 2006 | /* reserve 2-15 close to the inode for later flexibility */ |
1e1d2701 CM |
2007 | |
2008 | /* | |
2009 | * dir items are the name -> inode pointers in a directory. There is one | |
2010 | * for every name in a directory. | |
2011 | */ | |
0660b5af CM |
2012 | #define BTRFS_DIR_LOG_ITEM_KEY 60 |
2013 | #define BTRFS_DIR_LOG_INDEX_KEY 72 | |
2014 | #define BTRFS_DIR_ITEM_KEY 84 | |
2015 | #define BTRFS_DIR_INDEX_KEY 96 | |
1e1d2701 | 2016 | /* |
9078a3e1 | 2017 | * extent data is for file data |
1e1d2701 | 2018 | */ |
0660b5af | 2019 | #define BTRFS_EXTENT_DATA_KEY 108 |
d20f7043 | 2020 | |
f254e52c | 2021 | /* |
d20f7043 CM |
2022 | * extent csums are stored in a separate tree and hold csums for |
2023 | * an entire extent on disk. | |
f254e52c | 2024 | */ |
d20f7043 | 2025 | #define BTRFS_EXTENT_CSUM_KEY 128 |
f254e52c | 2026 | |
1e1d2701 | 2027 | /* |
d4a78947 | 2028 | * root items point to tree roots. They are typically in the root |
1e1d2701 CM |
2029 | * tree used by the super block to find all the other trees |
2030 | */ | |
0660b5af CM |
2031 | #define BTRFS_ROOT_ITEM_KEY 132 |
2032 | ||
2033 | /* | |
2034 | * root backrefs tie subvols and snapshots to the directory entries that | |
2035 | * reference them | |
2036 | */ | |
2037 | #define BTRFS_ROOT_BACKREF_KEY 144 | |
2038 | ||
2039 | /* | |
2040 | * root refs make a fast index for listing all of the snapshots and | |
2041 | * subvolumes referenced by a given root. They point directly to the | |
2042 | * directory item in the root that references the subvol | |
2043 | */ | |
2044 | #define BTRFS_ROOT_REF_KEY 156 | |
2045 | ||
1e1d2701 CM |
2046 | /* |
2047 | * extent items are in the extent map tree. These record which blocks | |
2048 | * are used, and how many references there are to each block | |
2049 | */ | |
0660b5af | 2050 | #define BTRFS_EXTENT_ITEM_KEY 168 |
5d4f98a2 | 2051 | |
3173a18f JB |
2052 | /* |
2053 | * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know | |
2054 | * the length, so we save the level in key->offset instead of the length. | |
2055 | */ | |
2056 | #define BTRFS_METADATA_ITEM_KEY 169 | |
2057 | ||
5d4f98a2 YZ |
2058 | #define BTRFS_TREE_BLOCK_REF_KEY 176 |
2059 | ||
2060 | #define BTRFS_EXTENT_DATA_REF_KEY 178 | |
2061 | ||
2062 | #define BTRFS_EXTENT_REF_V0_KEY 180 | |
2063 | ||
2064 | #define BTRFS_SHARED_BLOCK_REF_KEY 182 | |
2065 | ||
2066 | #define BTRFS_SHARED_DATA_REF_KEY 184 | |
9078a3e1 CM |
2067 | |
2068 | /* | |
2069 | * block groups give us hints into the extent allocation trees. Which | |
2070 | * blocks are free etc etc | |
2071 | */ | |
0660b5af | 2072 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 192 |
9f5fae2f | 2073 | |
208acb8c OS |
2074 | /* |
2075 | * Every block group is represented in the free space tree by a free space info | |
2076 | * item, which stores some accounting information. It is keyed on | |
2077 | * (block_group_start, FREE_SPACE_INFO, block_group_length). | |
2078 | */ | |
2079 | #define BTRFS_FREE_SPACE_INFO_KEY 198 | |
2080 | ||
2081 | /* | |
2082 | * A free space extent tracks an extent of space that is free in a block group. | |
2083 | * It is keyed on (start, FREE_SPACE_EXTENT, length). | |
2084 | */ | |
2085 | #define BTRFS_FREE_SPACE_EXTENT_KEY 199 | |
2086 | ||
2087 | /* | |
2088 | * When a block group becomes very fragmented, we convert it to use bitmaps | |
2089 | * instead of extents. A free space bitmap is keyed on | |
2090 | * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with | |
2091 | * (length / sectorsize) bits. | |
2092 | */ | |
2093 | #define BTRFS_FREE_SPACE_BITMAP_KEY 200 | |
2094 | ||
0660b5af CM |
2095 | #define BTRFS_DEV_EXTENT_KEY 204 |
2096 | #define BTRFS_DEV_ITEM_KEY 216 | |
2097 | #define BTRFS_CHUNK_ITEM_KEY 228 | |
0b86a832 | 2098 | |
630dc772 AJ |
2099 | /* |
2100 | * Records the overall state of the qgroups. | |
2101 | * There's only one instance of this key present, | |
2102 | * (0, BTRFS_QGROUP_STATUS_KEY, 0) | |
2103 | */ | |
2104 | #define BTRFS_QGROUP_STATUS_KEY 240 | |
2105 | /* | |
2106 | * Records the currently used space of the qgroup. | |
2107 | * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid). | |
2108 | */ | |
2109 | #define BTRFS_QGROUP_INFO_KEY 242 | |
2110 | /* | |
2111 | * Contains the user configured limits for the qgroup. | |
2112 | * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid). | |
2113 | */ | |
2114 | #define BTRFS_QGROUP_LIMIT_KEY 244 | |
2115 | /* | |
2116 | * Records the child-parent relationship of qgroups. For | |
2117 | * each relation, 2 keys are present: | |
2118 | * (childid, BTRFS_QGROUP_RELATION_KEY, parentid) | |
2119 | * (parentid, BTRFS_QGROUP_RELATION_KEY, childid) | |
2120 | */ | |
2121 | #define BTRFS_QGROUP_RELATION_KEY 246 | |
2122 | ||
0bbbccb1 DS |
2123 | /* |
2124 | * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY. | |
2125 | */ | |
0940ebf6 ID |
2126 | #define BTRFS_BALANCE_ITEM_KEY 248 |
2127 | ||
733f4fbb | 2128 | /* |
0bbbccb1 DS |
2129 | * The key type for tree items that are stored persistently, but do not need to |
2130 | * exist for extended period of time. The items can exist in any tree. | |
2131 | * | |
2132 | * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data] | |
2133 | * | |
2134 | * Existing items: | |
2135 | * | |
2136 | * - balance status item | |
2137 | * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0) | |
2138 | */ | |
2139 | #define BTRFS_TEMPORARY_ITEM_KEY 248 | |
0940ebf6 | 2140 | |
733f4fbb | 2141 | /* |
50c2d5ab | 2142 | * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY |
733f4fbb | 2143 | */ |
50c2d5ab DS |
2144 | #define BTRFS_DEV_STATS_KEY 249 |
2145 | ||
2146 | /* | |
2147 | * The key type for tree items that are stored persistently and usually exist | |
2148 | * for a long period, eg. filesystem lifetime. The item kinds can be status | |
2149 | * information, stats or preference values. The item can exist in any tree. | |
2150 | * | |
2151 | * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data] | |
2152 | * | |
2153 | * Existing items: | |
2154 | * | |
2155 | * - device statistics, store IO stats in the device tree, one key for all | |
2156 | * stats | |
242e2956 | 2157 | * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0) |
733f4fbb | 2158 | */ |
50c2d5ab | 2159 | #define BTRFS_PERSISTENT_ITEM_KEY 249 |
733f4fbb | 2160 | |
a2bff640 SB |
2161 | /* |
2162 | * Persistantly stores the device replace state in the device tree. | |
2163 | * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0). | |
2164 | */ | |
2165 | #define BTRFS_DEV_REPLACE_KEY 250 | |
2166 | ||
07b30a49 SB |
2167 | /* |
2168 | * Stores items that allow to quickly map UUIDs to something else. | |
2169 | * These items are part of the filesystem UUID tree. | |
2170 | * The key is built like this: | |
2171 | * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits). | |
2172 | */ | |
2173 | #if BTRFS_UUID_SIZE != 16 | |
2174 | #error "UUID items require BTRFS_UUID_SIZE == 16!" | |
2175 | #endif | |
2176 | #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */ | |
2177 | #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to | |
2178 | * received subvols */ | |
2179 | ||
1e1d2701 CM |
2180 | /* |
2181 | * string items are for debugging. They just store a short string of | |
2182 | * data in the FS | |
2183 | */ | |
9078a3e1 CM |
2184 | #define BTRFS_STRING_ITEM_KEY 253 |
2185 | ||
0942caa3 DS |
2186 | /* |
2187 | * Flags for mount options. | |
2188 | * | |
2189 | * Note: don't forget to add new options to btrfs_show_options() | |
2190 | */ | |
21ad10cf CM |
2191 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
2192 | #define BTRFS_MOUNT_NODATACOW (1 << 1) | |
2193 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) | |
e18e4809 | 2194 | #define BTRFS_MOUNT_SSD (1 << 3) |
dfe25020 | 2195 | #define BTRFS_MOUNT_DEGRADED (1 << 4) |
c8b97818 | 2196 | #define BTRFS_MOUNT_COMPRESS (1 << 5) |
3a5e1404 | 2197 | #define BTRFS_MOUNT_NOTREELOG (1 << 6) |
dccae999 | 2198 | #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) |
451d7585 | 2199 | #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) |
c289811c | 2200 | #define BTRFS_MOUNT_NOSSD (1 << 9) |
e244a0ae | 2201 | #define BTRFS_MOUNT_DISCARD (1 << 10) |
a555f810 | 2202 | #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) |
0af3d00b | 2203 | #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) |
88c2ba3b | 2204 | #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) |
4260f7c7 | 2205 | #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) |
91435650 | 2206 | #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) |
4cb5300b | 2207 | #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) |
4b9465cb | 2208 | #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) |
8dcddfa0 | 2209 | #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) |
9555c6c1 | 2210 | #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) |
c126dea7 CM |
2211 | #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) |
2212 | #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) | |
8c342930 | 2213 | #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) |
f420ee1e | 2214 | #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) |
d0bd4560 JB |
2215 | #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) |
2216 | #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) | |
f7d3d2f9 | 2217 | #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) |
96da0919 | 2218 | #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) |
b6cda9bc | 2219 | |
8b87dc17 | 2220 | #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) |
f7e98a7f | 2221 | #define BTRFS_DEFAULT_MAX_INLINE (2048) |
8b87dc17 | 2222 | |
b6cda9bc CM |
2223 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) |
2224 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) | |
dc81cdc5 | 2225 | #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) |
b6cda9bc CM |
2226 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ |
2227 | BTRFS_MOUNT_##opt) | |
572d9ab7 | 2228 | |
9d89ce65 WS |
2229 | #define btrfs_set_and_info(root, opt, fmt, args...) \ |
2230 | { \ | |
2231 | if (!btrfs_test_opt(root, opt)) \ | |
2232 | btrfs_info(root->fs_info, fmt, ##args); \ | |
2233 | btrfs_set_opt(root->fs_info->mount_opt, opt); \ | |
2234 | } | |
2235 | ||
2236 | #define btrfs_clear_and_info(root, opt, fmt, args...) \ | |
2237 | { \ | |
2238 | if (btrfs_test_opt(root, opt)) \ | |
2239 | btrfs_info(root->fs_info, fmt, ##args); \ | |
2240 | btrfs_clear_opt(root->fs_info->mount_opt, opt); \ | |
2241 | } | |
2242 | ||
d0bd4560 JB |
2243 | #ifdef CONFIG_BTRFS_DEBUG |
2244 | static inline int | |
2245 | btrfs_should_fragment_free_space(struct btrfs_root *root, | |
2246 | struct btrfs_block_group_cache *block_group) | |
2247 | { | |
2248 | return (btrfs_test_opt(root, FRAGMENT_METADATA) && | |
2249 | block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || | |
2250 | (btrfs_test_opt(root, FRAGMENT_DATA) && | |
2251 | block_group->flags & BTRFS_BLOCK_GROUP_DATA); | |
2252 | } | |
2253 | #endif | |
2254 | ||
572d9ab7 DS |
2255 | /* |
2256 | * Requests for changes that need to be done during transaction commit. | |
2257 | * | |
2258 | * Internal mount options that are used for special handling of the real | |
2259 | * mount options (eg. cannot be set during remount and have to be set during | |
2260 | * transaction commit) | |
2261 | */ | |
2262 | ||
7e1876ac DS |
2263 | #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) |
2264 | #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) | |
d51033d0 | 2265 | #define BTRFS_PENDING_COMMIT (2) |
7e1876ac | 2266 | |
572d9ab7 DS |
2267 | #define btrfs_test_pending(info, opt) \ |
2268 | test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) | |
2269 | #define btrfs_set_pending(info, opt) \ | |
2270 | set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) | |
2271 | #define btrfs_clear_pending(info, opt) \ | |
2272 | clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) | |
2273 | ||
2274 | /* | |
2275 | * Helpers for setting pending mount option changes. | |
2276 | * | |
2277 | * Expects corresponding macros | |
2278 | * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name | |
2279 | */ | |
2280 | #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ | |
2281 | do { \ | |
2282 | if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ | |
2283 | btrfs_info((info), fmt, ##args); \ | |
2284 | btrfs_set_pending((info), SET_##opt); \ | |
2285 | btrfs_clear_pending((info), CLEAR_##opt); \ | |
2286 | } \ | |
2287 | } while(0) | |
2288 | ||
2289 | #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ | |
2290 | do { \ | |
2291 | if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ | |
2292 | btrfs_info((info), fmt, ##args); \ | |
2293 | btrfs_set_pending((info), CLEAR_##opt); \ | |
2294 | btrfs_clear_pending((info), SET_##opt); \ | |
2295 | } \ | |
2296 | } while(0) | |
2297 | ||
b98b6767 Y |
2298 | /* |
2299 | * Inode flags | |
2300 | */ | |
fdebe2bd Y |
2301 | #define BTRFS_INODE_NODATASUM (1 << 0) |
2302 | #define BTRFS_INODE_NODATACOW (1 << 1) | |
2303 | #define BTRFS_INODE_READONLY (1 << 2) | |
c8b97818 | 2304 | #define BTRFS_INODE_NOCOMPRESS (1 << 3) |
d899e052 | 2305 | #define BTRFS_INODE_PREALLOC (1 << 4) |
6cbff00f CH |
2306 | #define BTRFS_INODE_SYNC (1 << 5) |
2307 | #define BTRFS_INODE_IMMUTABLE (1 << 6) | |
2308 | #define BTRFS_INODE_APPEND (1 << 7) | |
2309 | #define BTRFS_INODE_NODUMP (1 << 8) | |
2310 | #define BTRFS_INODE_NOATIME (1 << 9) | |
2311 | #define BTRFS_INODE_DIRSYNC (1 << 10) | |
75e7cb7f | 2312 | #define BTRFS_INODE_COMPRESS (1 << 11) |
6cbff00f | 2313 | |
08fe4db1 LZ |
2314 | #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) |
2315 | ||
cfed81a0 CM |
2316 | struct btrfs_map_token { |
2317 | struct extent_buffer *eb; | |
2318 | char *kaddr; | |
2319 | unsigned long offset; | |
2320 | }; | |
2321 | ||
2e78c927 CR |
2322 | #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ |
2323 | ((bytes) >> (fs_info)->sb->s_blocksize_bits) | |
2324 | ||
cfed81a0 CM |
2325 | static inline void btrfs_init_map_token (struct btrfs_map_token *token) |
2326 | { | |
ad914559 | 2327 | token->kaddr = NULL; |
cfed81a0 CM |
2328 | } |
2329 | ||
5f39d397 CM |
2330 | /* some macros to generate set/get funcs for the struct fields. This |
2331 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | |
2332 | * one for u8: | |
2333 | */ | |
2334 | #define le8_to_cpu(v) (v) | |
2335 | #define cpu_to_le8(v) (v) | |
2336 | #define __le8 u8 | |
2337 | ||
2338 | #define read_eb_member(eb, ptr, type, member, result) ( \ | |
2339 | read_extent_buffer(eb, (char *)(result), \ | |
2340 | ((unsigned long)(ptr)) + \ | |
2341 | offsetof(type, member), \ | |
2342 | sizeof(((type *)0)->member))) | |
2343 | ||
2344 | #define write_eb_member(eb, ptr, type, member, result) ( \ | |
2345 | write_extent_buffer(eb, (char *)(result), \ | |
2346 | ((unsigned long)(ptr)) + \ | |
2347 | offsetof(type, member), \ | |
2348 | sizeof(((type *)0)->member))) | |
2349 | ||
18077bb4 LZ |
2350 | #define DECLARE_BTRFS_SETGET_BITS(bits) \ |
2351 | u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \ | |
2352 | unsigned long off, \ | |
2353 | struct btrfs_map_token *token); \ | |
2354 | void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \ | |
2355 | unsigned long off, u##bits val, \ | |
2356 | struct btrfs_map_token *token); \ | |
2357 | static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \ | |
2358 | unsigned long off) \ | |
2359 | { \ | |
2360 | return btrfs_get_token_##bits(eb, ptr, off, NULL); \ | |
2361 | } \ | |
2362 | static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \ | |
2363 | unsigned long off, u##bits val) \ | |
2364 | { \ | |
2365 | btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ | |
2366 | } | |
2367 | ||
2368 | DECLARE_BTRFS_SETGET_BITS(8) | |
2369 | DECLARE_BTRFS_SETGET_BITS(16) | |
2370 | DECLARE_BTRFS_SETGET_BITS(32) | |
2371 | DECLARE_BTRFS_SETGET_BITS(64) | |
2372 | ||
5f39d397 | 2373 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
18077bb4 LZ |
2374 | static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \ |
2375 | { \ | |
2376 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ | |
2377 | return btrfs_get_##bits(eb, s, offsetof(type, member)); \ | |
2378 | } \ | |
2379 | static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ | |
2380 | u##bits val) \ | |
2381 | { \ | |
2382 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ | |
2383 | btrfs_set_##bits(eb, s, offsetof(type, member), val); \ | |
2384 | } \ | |
2385 | static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \ | |
2386 | struct btrfs_map_token *token) \ | |
2387 | { \ | |
2388 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ | |
2389 | return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ | |
2390 | } \ | |
2391 | static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ | |
2392 | type *s, u##bits val, \ | |
2393 | struct btrfs_map_token *token) \ | |
2394 | { \ | |
2395 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ | |
2396 | btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ | |
2397 | } | |
5f39d397 CM |
2398 | |
2399 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | |
2400 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | |
2401 | { \ | |
727011e0 | 2402 | type *p = page_address(eb->pages[0]); \ |
df68b8a7 | 2403 | u##bits res = le##bits##_to_cpu(p->member); \ |
810191ff | 2404 | return res; \ |
5f39d397 CM |
2405 | } \ |
2406 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
2407 | u##bits val) \ | |
2408 | { \ | |
727011e0 | 2409 | type *p = page_address(eb->pages[0]); \ |
df68b8a7 | 2410 | p->member = cpu_to_le##bits(val); \ |
5f39d397 | 2411 | } |
9078a3e1 | 2412 | |
5f39d397 CM |
2413 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
2414 | static inline u##bits btrfs_##name(type *s) \ | |
2415 | { \ | |
2416 | return le##bits##_to_cpu(s->member); \ | |
2417 | } \ | |
2418 | static inline void btrfs_set_##name(type *s, u##bits val) \ | |
2419 | { \ | |
2420 | s->member = cpu_to_le##bits(val); \ | |
1e1d2701 CM |
2421 | } |
2422 | ||
0b86a832 CM |
2423 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
2424 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); | |
2425 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); | |
2426 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); | |
2427 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); | |
c3027eb5 CM |
2428 | BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, |
2429 | start_offset, 64); | |
0b86a832 CM |
2430 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); |
2431 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
2432 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); |
2433 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); | |
2434 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); | |
2b82032c | 2435 | BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); |
0b86a832 | 2436 | |
8a4b83cc CM |
2437 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
2438 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, | |
2439 | total_bytes, 64); | |
2440 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, | |
2441 | bytes_used, 64); | |
2442 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, | |
2443 | io_align, 32); | |
2444 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, | |
2445 | io_width, 32); | |
2446 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, | |
2447 | sector_size, 32); | |
2448 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
2449 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, |
2450 | dev_group, 32); | |
2451 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, | |
2452 | seek_speed, 8); | |
2453 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, | |
2454 | bandwidth, 8); | |
2b82032c YZ |
2455 | BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, |
2456 | generation, 64); | |
8a4b83cc | 2457 | |
410ba3a2 | 2458 | static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) |
0b86a832 | 2459 | { |
410ba3a2 | 2460 | return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); |
0b86a832 CM |
2461 | } |
2462 | ||
1473b24e | 2463 | static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) |
2b82032c | 2464 | { |
1473b24e | 2465 | return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); |
2b82032c YZ |
2466 | } |
2467 | ||
e17cade2 | 2468 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
0b86a832 CM |
2469 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
2470 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); | |
2471 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); | |
2472 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); | |
2473 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); | |
2474 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); | |
2475 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); | |
321aecc6 | 2476 | BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); |
0b86a832 CM |
2477 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
2478 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); | |
2479 | ||
e17cade2 CM |
2480 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
2481 | { | |
2482 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); | |
2483 | } | |
2484 | ||
2485 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); | |
0b86a832 CM |
2486 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
2487 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, | |
2488 | stripe_len, 64); | |
2489 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, | |
2490 | io_align, 32); | |
2491 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, | |
2492 | io_width, 32); | |
2493 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, | |
2494 | sector_size, 32); | |
2495 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); | |
2496 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, | |
2497 | num_stripes, 16); | |
321aecc6 CM |
2498 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, |
2499 | sub_stripes, 16); | |
0b86a832 CM |
2500 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
2501 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); | |
2502 | ||
2503 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, | |
2504 | int nr) | |
2505 | { | |
2506 | unsigned long offset = (unsigned long)c; | |
2507 | offset += offsetof(struct btrfs_chunk, stripe); | |
2508 | offset += nr * sizeof(struct btrfs_stripe); | |
2509 | return (struct btrfs_stripe *)offset; | |
2510 | } | |
2511 | ||
a443755f CM |
2512 | static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) |
2513 | { | |
2514 | return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); | |
2515 | } | |
2516 | ||
0b86a832 CM |
2517 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
2518 | struct btrfs_chunk *c, int nr) | |
2519 | { | |
2520 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); | |
2521 | } | |
2522 | ||
0b86a832 CM |
2523 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, |
2524 | struct btrfs_chunk *c, int nr) | |
2525 | { | |
2526 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); | |
2527 | } | |
2528 | ||
5f39d397 CM |
2529 | /* struct btrfs_block_group_item */ |
2530 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | |
2531 | used, 64); | |
2532 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | |
2533 | used, 64); | |
0b86a832 CM |
2534 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
2535 | struct btrfs_block_group_item, chunk_objectid, 64); | |
e17cade2 CM |
2536 | |
2537 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, | |
0b86a832 CM |
2538 | struct btrfs_block_group_item, chunk_objectid, 64); |
2539 | BTRFS_SETGET_FUNCS(disk_block_group_flags, | |
2540 | struct btrfs_block_group_item, flags, 64); | |
2541 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, | |
2542 | struct btrfs_block_group_item, flags, 64); | |
1e1d2701 | 2543 | |
208acb8c OS |
2544 | /* struct btrfs_free_space_info */ |
2545 | BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, | |
2546 | extent_count, 32); | |
2547 | BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); | |
2548 | ||
3954401f CM |
2549 | /* struct btrfs_inode_ref */ |
2550 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); | |
aec7477b | 2551 | BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); |
3954401f | 2552 | |
f186373f MF |
2553 | /* struct btrfs_inode_extref */ |
2554 | BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, | |
2555 | parent_objectid, 64); | |
2556 | BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, | |
2557 | name_len, 16); | |
2558 | BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); | |
2559 | ||
5f39d397 CM |
2560 | /* struct btrfs_inode_item */ |
2561 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | |
c3027eb5 | 2562 | BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); |
e02119d5 | 2563 | BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); |
5f39d397 | 2564 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); |
a76a3cd4 | 2565 | BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); |
5f39d397 CM |
2566 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); |
2567 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | |
2568 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | |
2569 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | |
2570 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | |
0b86a832 | 2571 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
f2b636e8 | 2572 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); |
3cae210f QW |
2573 | BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, |
2574 | generation, 64); | |
2575 | BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, | |
2576 | sequence, 64); | |
2577 | BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, | |
2578 | transid, 64); | |
2579 | BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); | |
2580 | BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, | |
2581 | nbytes, 64); | |
2582 | BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, | |
2583 | block_group, 64); | |
2584 | BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); | |
2585 | BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); | |
2586 | BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); | |
2587 | BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); | |
2588 | BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); | |
2589 | BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); | |
0b86a832 CM |
2590 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
2591 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); | |
3cae210f QW |
2592 | BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); |
2593 | BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); | |
e20d96d6 | 2594 | |
0b86a832 | 2595 | /* struct btrfs_dev_extent */ |
e17cade2 CM |
2596 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
2597 | chunk_tree, 64); | |
2598 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, | |
2599 | chunk_objectid, 64); | |
2600 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, | |
2601 | chunk_offset, 64); | |
0b86a832 CM |
2602 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
2603 | ||
231e88f4 | 2604 | static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
e17cade2 CM |
2605 | { |
2606 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); | |
231e88f4 | 2607 | return (unsigned long)dev + ptr; |
e17cade2 CM |
2608 | } |
2609 | ||
5d4f98a2 YZ |
2610 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); |
2611 | BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, | |
2612 | generation, 64); | |
2613 | BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); | |
74493f7a | 2614 | |
5d4f98a2 YZ |
2615 | BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); |
2616 | ||
2617 | ||
2618 | BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); | |
2619 | ||
2620 | static inline void btrfs_tree_block_key(struct extent_buffer *eb, | |
2621 | struct btrfs_tree_block_info *item, | |
2622 | struct btrfs_disk_key *key) | |
2623 | { | |
2624 | read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
2625 | } | |
2626 | ||
2627 | static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, | |
2628 | struct btrfs_tree_block_info *item, | |
2629 | struct btrfs_disk_key *key) | |
2630 | { | |
2631 | write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
2632 | } | |
e20d96d6 | 2633 | |
5d4f98a2 YZ |
2634 | BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, |
2635 | root, 64); | |
2636 | BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, | |
2637 | objectid, 64); | |
2638 | BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, | |
2639 | offset, 64); | |
2640 | BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, | |
2641 | count, 32); | |
2642 | ||
2643 | BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, | |
2644 | count, 32); | |
2645 | ||
2646 | BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, | |
2647 | type, 8); | |
2648 | BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, | |
2649 | offset, 64); | |
2650 | ||
2651 | static inline u32 btrfs_extent_inline_ref_size(int type) | |
2652 | { | |
2653 | if (type == BTRFS_TREE_BLOCK_REF_KEY || | |
2654 | type == BTRFS_SHARED_BLOCK_REF_KEY) | |
2655 | return sizeof(struct btrfs_extent_inline_ref); | |
2656 | if (type == BTRFS_SHARED_DATA_REF_KEY) | |
2657 | return sizeof(struct btrfs_shared_data_ref) + | |
2658 | sizeof(struct btrfs_extent_inline_ref); | |
2659 | if (type == BTRFS_EXTENT_DATA_REF_KEY) | |
2660 | return sizeof(struct btrfs_extent_data_ref) + | |
2661 | offsetof(struct btrfs_extent_inline_ref, offset); | |
2662 | BUG(); | |
2663 | return 0; | |
2664 | } | |
2665 | ||
2666 | BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); | |
2667 | BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, | |
2668 | generation, 64); | |
2669 | BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); | |
2670 | BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); | |
e20d96d6 | 2671 | |
5f39d397 CM |
2672 | /* struct btrfs_node */ |
2673 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | |
74493f7a | 2674 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
3cae210f QW |
2675 | BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, |
2676 | blockptr, 64); | |
2677 | BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, | |
2678 | generation, 64); | |
e20d96d6 | 2679 | |
5f39d397 | 2680 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
cf27e1ee | 2681 | { |
5f39d397 CM |
2682 | unsigned long ptr; |
2683 | ptr = offsetof(struct btrfs_node, ptrs) + | |
2684 | sizeof(struct btrfs_key_ptr) * nr; | |
2685 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | |
cf27e1ee CM |
2686 | } |
2687 | ||
5f39d397 CM |
2688 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
2689 | int nr, u64 val) | |
cf27e1ee | 2690 | { |
5f39d397 CM |
2691 | unsigned long ptr; |
2692 | ptr = offsetof(struct btrfs_node, ptrs) + | |
2693 | sizeof(struct btrfs_key_ptr) * nr; | |
2694 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | |
cf27e1ee CM |
2695 | } |
2696 | ||
74493f7a CM |
2697 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
2698 | { | |
2699 | unsigned long ptr; | |
2700 | ptr = offsetof(struct btrfs_node, ptrs) + | |
2701 | sizeof(struct btrfs_key_ptr) * nr; | |
2702 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); | |
2703 | } | |
2704 | ||
2705 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, | |
2706 | int nr, u64 val) | |
2707 | { | |
2708 | unsigned long ptr; | |
2709 | ptr = offsetof(struct btrfs_node, ptrs) + | |
2710 | sizeof(struct btrfs_key_ptr) * nr; | |
2711 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); | |
2712 | } | |
2713 | ||
810191ff | 2714 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
4d775673 | 2715 | { |
5f39d397 CM |
2716 | return offsetof(struct btrfs_node, ptrs) + |
2717 | sizeof(struct btrfs_key_ptr) * nr; | |
4d775673 CM |
2718 | } |
2719 | ||
e644d021 CM |
2720 | void btrfs_node_key(struct extent_buffer *eb, |
2721 | struct btrfs_disk_key *disk_key, int nr); | |
2722 | ||
5f39d397 CM |
2723 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
2724 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f8a0c | 2725 | { |
5f39d397 CM |
2726 | unsigned long ptr; |
2727 | ptr = btrfs_node_key_ptr_offset(nr); | |
2728 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
2729 | struct btrfs_key_ptr, key, disk_key); | |
1d4f8a0c CM |
2730 | } |
2731 | ||
5f39d397 CM |
2732 | /* struct btrfs_item */ |
2733 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | |
2734 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | |
3cae210f QW |
2735 | BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); |
2736 | BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); | |
4d775673 | 2737 | |
5f39d397 | 2738 | static inline unsigned long btrfs_item_nr_offset(int nr) |
1d4f8a0c | 2739 | { |
5f39d397 CM |
2740 | return offsetof(struct btrfs_leaf, items) + |
2741 | sizeof(struct btrfs_item) * nr; | |
1d4f8a0c CM |
2742 | } |
2743 | ||
dd3cc16b | 2744 | static inline struct btrfs_item *btrfs_item_nr(int nr) |
0783fcfc | 2745 | { |
5f39d397 | 2746 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
0783fcfc CM |
2747 | } |
2748 | ||
5f39d397 CM |
2749 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
2750 | struct btrfs_item *item) | |
0783fcfc | 2751 | { |
5f39d397 | 2752 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
0783fcfc CM |
2753 | } |
2754 | ||
5f39d397 | 2755 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 2756 | { |
dd3cc16b | 2757 | return btrfs_item_end(eb, btrfs_item_nr(nr)); |
0783fcfc CM |
2758 | } |
2759 | ||
5f39d397 | 2760 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 2761 | { |
dd3cc16b | 2762 | return btrfs_item_offset(eb, btrfs_item_nr(nr)); |
0783fcfc CM |
2763 | } |
2764 | ||
5f39d397 | 2765 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 2766 | { |
dd3cc16b | 2767 | return btrfs_item_size(eb, btrfs_item_nr(nr)); |
0783fcfc CM |
2768 | } |
2769 | ||
5f39d397 CM |
2770 | static inline void btrfs_item_key(struct extent_buffer *eb, |
2771 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 2772 | { |
dd3cc16b | 2773 | struct btrfs_item *item = btrfs_item_nr(nr); |
5f39d397 | 2774 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); |
1d4f6404 CM |
2775 | } |
2776 | ||
5f39d397 CM |
2777 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
2778 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 2779 | { |
dd3cc16b | 2780 | struct btrfs_item *item = btrfs_item_nr(nr); |
5f39d397 | 2781 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); |
1d4f6404 CM |
2782 | } |
2783 | ||
e02119d5 CM |
2784 | BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); |
2785 | ||
0660b5af CM |
2786 | /* |
2787 | * struct btrfs_root_ref | |
2788 | */ | |
2789 | BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); | |
2790 | BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); | |
2791 | BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); | |
2792 | ||
5f39d397 | 2793 | /* struct btrfs_dir_item */ |
5103e947 | 2794 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
5f39d397 CM |
2795 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
2796 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | |
e02119d5 | 2797 | BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); |
3cae210f QW |
2798 | BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); |
2799 | BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, | |
2800 | data_len, 16); | |
2801 | BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, | |
2802 | name_len, 16); | |
2803 | BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, | |
2804 | transid, 64); | |
1d4f6404 | 2805 | |
5f39d397 CM |
2806 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
2807 | struct btrfs_dir_item *item, | |
2808 | struct btrfs_disk_key *key) | |
1d4f6404 | 2809 | { |
5f39d397 | 2810 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
1d4f6404 CM |
2811 | } |
2812 | ||
5f39d397 CM |
2813 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
2814 | struct btrfs_dir_item *item, | |
2815 | struct btrfs_disk_key *key) | |
a8a2ee0c | 2816 | { |
5f39d397 | 2817 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
a8a2ee0c CM |
2818 | } |
2819 | ||
0af3d00b JB |
2820 | BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, |
2821 | num_entries, 64); | |
2822 | BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, | |
2823 | num_bitmaps, 64); | |
2824 | BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, | |
2825 | generation, 64); | |
2826 | ||
2827 | static inline void btrfs_free_space_key(struct extent_buffer *eb, | |
2828 | struct btrfs_free_space_header *h, | |
2829 | struct btrfs_disk_key *key) | |
2830 | { | |
2831 | read_eb_member(eb, h, struct btrfs_free_space_header, location, key); | |
2832 | } | |
2833 | ||
2834 | static inline void btrfs_set_free_space_key(struct extent_buffer *eb, | |
2835 | struct btrfs_free_space_header *h, | |
2836 | struct btrfs_disk_key *key) | |
2837 | { | |
2838 | write_eb_member(eb, h, struct btrfs_free_space_header, location, key); | |
2839 | } | |
2840 | ||
5f39d397 CM |
2841 | /* struct btrfs_disk_key */ |
2842 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | |
2843 | objectid, 64); | |
2844 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | |
2845 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | |
1d4f6404 | 2846 | |
e2fa7227 CM |
2847 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
2848 | struct btrfs_disk_key *disk) | |
2849 | { | |
2850 | cpu->offset = le64_to_cpu(disk->offset); | |
5f39d397 | 2851 | cpu->type = disk->type; |
e2fa7227 CM |
2852 | cpu->objectid = le64_to_cpu(disk->objectid); |
2853 | } | |
2854 | ||
2855 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
2856 | struct btrfs_key *cpu) | |
2857 | { | |
2858 | disk->offset = cpu_to_le64(cpu->offset); | |
5f39d397 | 2859 | disk->type = cpu->type; |
e2fa7227 CM |
2860 | disk->objectid = cpu_to_le64(cpu->objectid); |
2861 | } | |
2862 | ||
5f39d397 CM |
2863 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
2864 | struct btrfs_key *key, int nr) | |
7f5c1516 | 2865 | { |
5f39d397 CM |
2866 | struct btrfs_disk_key disk_key; |
2867 | btrfs_node_key(eb, &disk_key, nr); | |
2868 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
2869 | } |
2870 | ||
5f39d397 CM |
2871 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
2872 | struct btrfs_key *key, int nr) | |
7f5c1516 | 2873 | { |
5f39d397 CM |
2874 | struct btrfs_disk_key disk_key; |
2875 | btrfs_item_key(eb, &disk_key, nr); | |
2876 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
2877 | } |
2878 | ||
5f39d397 CM |
2879 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
2880 | struct btrfs_dir_item *item, | |
2881 | struct btrfs_key *key) | |
4d775673 | 2882 | { |
5f39d397 CM |
2883 | struct btrfs_disk_key disk_key; |
2884 | btrfs_dir_item_key(eb, item, &disk_key); | |
2885 | btrfs_disk_key_to_cpu(key, &disk_key); | |
4d775673 CM |
2886 | } |
2887 | ||
58176a96 | 2888 | |
5f39d397 | 2889 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
3768f368 | 2890 | { |
5f39d397 | 2891 | return key->type; |
3768f368 CM |
2892 | } |
2893 | ||
5f39d397 | 2894 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
3768f368 | 2895 | { |
5f39d397 | 2896 | key->type = val; |
3768f368 CM |
2897 | } |
2898 | ||
5f39d397 | 2899 | /* struct btrfs_header */ |
db94535d | 2900 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
5f39d397 CM |
2901 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
2902 | generation, 64); | |
2903 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | |
2904 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | |
63b10fc4 | 2905 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
5f39d397 | 2906 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
3cae210f QW |
2907 | BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, |
2908 | generation, 64); | |
2909 | BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); | |
2910 | BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, | |
2911 | nritems, 32); | |
2912 | BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); | |
0f7d52f4 | 2913 | |
63b10fc4 CM |
2914 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) |
2915 | { | |
2916 | return (btrfs_header_flags(eb) & flag) == flag; | |
2917 | } | |
2918 | ||
2919 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) | |
2920 | { | |
2921 | u64 flags = btrfs_header_flags(eb); | |
2922 | btrfs_set_header_flags(eb, flags | flag); | |
2923 | return (flags & flag) == flag; | |
2924 | } | |
2925 | ||
2926 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) | |
2927 | { | |
2928 | u64 flags = btrfs_header_flags(eb); | |
2929 | btrfs_set_header_flags(eb, flags & ~flag); | |
2930 | return (flags & flag) == flag; | |
2931 | } | |
2932 | ||
5d4f98a2 YZ |
2933 | static inline int btrfs_header_backref_rev(struct extent_buffer *eb) |
2934 | { | |
2935 | u64 flags = btrfs_header_flags(eb); | |
2936 | return flags >> BTRFS_BACKREF_REV_SHIFT; | |
2937 | } | |
2938 | ||
2939 | static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, | |
2940 | int rev) | |
2941 | { | |
2942 | u64 flags = btrfs_header_flags(eb); | |
2943 | flags &= ~BTRFS_BACKREF_REV_MASK; | |
2944 | flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; | |
2945 | btrfs_set_header_flags(eb, flags); | |
2946 | } | |
2947 | ||
0a4e5586 | 2948 | static inline unsigned long btrfs_header_fsid(void) |
0f7d52f4 | 2949 | { |
fba6aa75 | 2950 | return offsetof(struct btrfs_header, fsid); |
0f7d52f4 CM |
2951 | } |
2952 | ||
b308bc2f | 2953 | static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) |
e17cade2 | 2954 | { |
b308bc2f | 2955 | return offsetof(struct btrfs_header, chunk_tree_uuid); |
e17cade2 CM |
2956 | } |
2957 | ||
5f39d397 | 2958 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
3768f368 | 2959 | { |
d397712b | 2960 | return btrfs_header_level(eb) == 0; |
3768f368 CM |
2961 | } |
2962 | ||
5f39d397 | 2963 | /* struct btrfs_root_item */ |
84234f3a YZ |
2964 | BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, |
2965 | generation, 64); | |
5f39d397 | 2966 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); |
db94535d CM |
2967 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
2968 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); | |
3768f368 | 2969 | |
84234f3a YZ |
2970 | BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, |
2971 | generation, 64); | |
db94535d CM |
2972 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
2973 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); | |
5f39d397 CM |
2974 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
2975 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | |
f2b636e8 | 2976 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); |
db94535d CM |
2977 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
2978 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); | |
80ff3856 YZ |
2979 | BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, |
2980 | last_snapshot, 64); | |
8ea05e3a AB |
2981 | BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, |
2982 | generation_v2, 64); | |
2983 | BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, | |
2984 | ctransid, 64); | |
2985 | BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, | |
2986 | otransid, 64); | |
2987 | BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, | |
2988 | stransid, 64); | |
2989 | BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, | |
2990 | rtransid, 64); | |
123abc88 | 2991 | |
b83cc969 LZ |
2992 | static inline bool btrfs_root_readonly(struct btrfs_root *root) |
2993 | { | |
6ed3cf2c | 2994 | return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; |
b83cc969 LZ |
2995 | } |
2996 | ||
521e0546 DS |
2997 | static inline bool btrfs_root_dead(struct btrfs_root *root) |
2998 | { | |
2999 | return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; | |
3000 | } | |
3001 | ||
af31f5e5 CM |
3002 | /* struct btrfs_root_backup */ |
3003 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, | |
3004 | tree_root, 64); | |
3005 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, | |
3006 | tree_root_gen, 64); | |
3007 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, | |
3008 | tree_root_level, 8); | |
3009 | ||
3010 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, | |
3011 | chunk_root, 64); | |
3012 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, | |
3013 | chunk_root_gen, 64); | |
3014 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, | |
3015 | chunk_root_level, 8); | |
3016 | ||
3017 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, | |
3018 | extent_root, 64); | |
3019 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, | |
3020 | extent_root_gen, 64); | |
3021 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, | |
3022 | extent_root_level, 8); | |
3023 | ||
3024 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, | |
3025 | fs_root, 64); | |
3026 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, | |
3027 | fs_root_gen, 64); | |
3028 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, | |
3029 | fs_root_level, 8); | |
3030 | ||
3031 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, | |
3032 | dev_root, 64); | |
3033 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, | |
3034 | dev_root_gen, 64); | |
3035 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, | |
3036 | dev_root_level, 8); | |
3037 | ||
3038 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, | |
3039 | csum_root, 64); | |
3040 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, | |
3041 | csum_root_gen, 64); | |
3042 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, | |
3043 | csum_root_level, 8); | |
3044 | BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, | |
3045 | total_bytes, 64); | |
3046 | BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, | |
3047 | bytes_used, 64); | |
3048 | BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, | |
3049 | num_devices, 64); | |
3050 | ||
0940ebf6 ID |
3051 | /* struct btrfs_balance_item */ |
3052 | BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); | |
607d432d | 3053 | |
0940ebf6 ID |
3054 | static inline void btrfs_balance_data(struct extent_buffer *eb, |
3055 | struct btrfs_balance_item *bi, | |
3056 | struct btrfs_disk_balance_args *ba) | |
3057 | { | |
3058 | read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); | |
3059 | } | |
3060 | ||
3061 | static inline void btrfs_set_balance_data(struct extent_buffer *eb, | |
3062 | struct btrfs_balance_item *bi, | |
3063 | struct btrfs_disk_balance_args *ba) | |
3064 | { | |
3065 | write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); | |
3066 | } | |
3067 | ||
3068 | static inline void btrfs_balance_meta(struct extent_buffer *eb, | |
3069 | struct btrfs_balance_item *bi, | |
3070 | struct btrfs_disk_balance_args *ba) | |
3071 | { | |
3072 | read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); | |
3073 | } | |
3074 | ||
3075 | static inline void btrfs_set_balance_meta(struct extent_buffer *eb, | |
3076 | struct btrfs_balance_item *bi, | |
3077 | struct btrfs_disk_balance_args *ba) | |
3078 | { | |
3079 | write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); | |
3080 | } | |
3081 | ||
3082 | static inline void btrfs_balance_sys(struct extent_buffer *eb, | |
3083 | struct btrfs_balance_item *bi, | |
3084 | struct btrfs_disk_balance_args *ba) | |
3085 | { | |
3086 | read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); | |
3087 | } | |
3088 | ||
3089 | static inline void btrfs_set_balance_sys(struct extent_buffer *eb, | |
3090 | struct btrfs_balance_item *bi, | |
3091 | struct btrfs_disk_balance_args *ba) | |
3092 | { | |
3093 | write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); | |
3094 | } | |
3095 | ||
3096 | static inline void | |
3097 | btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, | |
3098 | struct btrfs_disk_balance_args *disk) | |
3099 | { | |
3100 | memset(cpu, 0, sizeof(*cpu)); | |
3101 | ||
3102 | cpu->profiles = le64_to_cpu(disk->profiles); | |
3103 | cpu->usage = le64_to_cpu(disk->usage); | |
3104 | cpu->devid = le64_to_cpu(disk->devid); | |
3105 | cpu->pstart = le64_to_cpu(disk->pstart); | |
3106 | cpu->pend = le64_to_cpu(disk->pend); | |
3107 | cpu->vstart = le64_to_cpu(disk->vstart); | |
3108 | cpu->vend = le64_to_cpu(disk->vend); | |
3109 | cpu->target = le64_to_cpu(disk->target); | |
3110 | cpu->flags = le64_to_cpu(disk->flags); | |
7d824b6f | 3111 | cpu->limit = le64_to_cpu(disk->limit); |
0940ebf6 ID |
3112 | } |
3113 | ||
3114 | static inline void | |
3115 | btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, | |
3116 | struct btrfs_balance_args *cpu) | |
3117 | { | |
3118 | memset(disk, 0, sizeof(*disk)); | |
3119 | ||
3120 | disk->profiles = cpu_to_le64(cpu->profiles); | |
3121 | disk->usage = cpu_to_le64(cpu->usage); | |
3122 | disk->devid = cpu_to_le64(cpu->devid); | |
3123 | disk->pstart = cpu_to_le64(cpu->pstart); | |
3124 | disk->pend = cpu_to_le64(cpu->pend); | |
3125 | disk->vstart = cpu_to_le64(cpu->vstart); | |
3126 | disk->vend = cpu_to_le64(cpu->vend); | |
3127 | disk->target = cpu_to_le64(cpu->target); | |
3128 | disk->flags = cpu_to_le64(cpu->flags); | |
7d824b6f | 3129 | disk->limit = cpu_to_le64(cpu->limit); |
0940ebf6 ID |
3130 | } |
3131 | ||
3132 | /* struct btrfs_super_block */ | |
db94535d | 3133 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
a061fc8d | 3134 | BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); |
5f39d397 CM |
3135 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
3136 | generation, 64); | |
3137 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | |
0b86a832 CM |
3138 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
3139 | struct btrfs_super_block, sys_chunk_array_size, 32); | |
84234f3a YZ |
3140 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, |
3141 | struct btrfs_super_block, chunk_root_generation, 64); | |
db94535d CM |
3142 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
3143 | root_level, 8); | |
0b86a832 CM |
3144 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
3145 | chunk_root, 64); | |
3146 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, | |
e02119d5 CM |
3147 | chunk_root_level, 8); |
3148 | BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, | |
3149 | log_root, 64); | |
c3027eb5 CM |
3150 | BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, |
3151 | log_root_transid, 64); | |
e02119d5 CM |
3152 | BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, |
3153 | log_root_level, 8); | |
db94535d CM |
3154 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
3155 | total_bytes, 64); | |
3156 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, | |
3157 | bytes_used, 64); | |
5f39d397 CM |
3158 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
3159 | sectorsize, 32); | |
3160 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | |
3161 | nodesize, 32); | |
87ee04eb CM |
3162 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
3163 | stripesize, 32); | |
5f39d397 CM |
3164 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
3165 | root_dir_objectid, 64); | |
8a4b83cc CM |
3166 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
3167 | num_devices, 64); | |
f2b636e8 JB |
3168 | BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, |
3169 | compat_flags, 64); | |
3170 | BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, | |
12534832 | 3171 | compat_ro_flags, 64); |
f2b636e8 JB |
3172 | BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, |
3173 | incompat_flags, 64); | |
607d432d JB |
3174 | BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, |
3175 | csum_type, 16); | |
0af3d00b JB |
3176 | BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, |
3177 | cache_generation, 64); | |
3cae210f | 3178 | BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); |
26432799 SB |
3179 | BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, |
3180 | uuid_tree_generation, 64); | |
607d432d JB |
3181 | |
3182 | static inline int btrfs_super_csum_size(struct btrfs_super_block *s) | |
3183 | { | |
1104a885 DS |
3184 | u16 t = btrfs_super_csum_type(s); |
3185 | /* | |
3186 | * csum type is validated at mount time | |
3187 | */ | |
607d432d JB |
3188 | return btrfs_csum_sizes[t]; |
3189 | } | |
2e635a27 | 3190 | |
5f39d397 | 3191 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
2e635a27 | 3192 | { |
5f39d397 | 3193 | return offsetof(struct btrfs_leaf, items); |
2e635a27 CM |
3194 | } |
3195 | ||
5f39d397 CM |
3196 | /* struct btrfs_file_extent_item */ |
3197 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | |
3cae210f QW |
3198 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, |
3199 | struct btrfs_file_extent_item, disk_bytenr, 64); | |
3200 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, | |
3201 | struct btrfs_file_extent_item, offset, 64); | |
3202 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, | |
3203 | struct btrfs_file_extent_item, generation, 64); | |
3204 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, | |
3205 | struct btrfs_file_extent_item, num_bytes, 64); | |
e20d6c5b JB |
3206 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, |
3207 | struct btrfs_file_extent_item, disk_num_bytes, 64); | |
3208 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, | |
3209 | struct btrfs_file_extent_item, compression, 8); | |
9f5fae2f | 3210 | |
d397712b CM |
3211 | static inline unsigned long |
3212 | btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) | |
236454df | 3213 | { |
7ec20afb | 3214 | return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; |
236454df CM |
3215 | } |
3216 | ||
3217 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
3218 | { | |
7ec20afb | 3219 | return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; |
9f5fae2f CM |
3220 | } |
3221 | ||
db94535d CM |
3222 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
3223 | disk_bytenr, 64); | |
5f39d397 CM |
3224 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
3225 | generation, 64); | |
db94535d CM |
3226 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
3227 | disk_num_bytes, 64); | |
5f39d397 CM |
3228 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
3229 | offset, 64); | |
db94535d CM |
3230 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
3231 | num_bytes, 64); | |
c8b97818 CM |
3232 | BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, |
3233 | ram_bytes, 64); | |
3234 | BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, | |
3235 | compression, 8); | |
3236 | BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, | |
3237 | encryption, 8); | |
3238 | BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, | |
3239 | other_encoding, 16); | |
3240 | ||
c8b97818 CM |
3241 | /* |
3242 | * this returns the number of bytes used by the item on disk, minus the | |
3243 | * size of any extent headers. If a file is compressed on disk, this is | |
3244 | * the compressed size | |
3245 | */ | |
3246 | static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, | |
3247 | struct btrfs_item *e) | |
3248 | { | |
7ec20afb | 3249 | return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; |
c8b97818 | 3250 | } |
9f5fae2f | 3251 | |
514ac8ad CM |
3252 | /* this returns the number of file bytes represented by the inline item. |
3253 | * If an item is compressed, this is the uncompressed size | |
3254 | */ | |
3255 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, | |
3256 | int slot, | |
3257 | struct btrfs_file_extent_item *fi) | |
3258 | { | |
3259 | struct btrfs_map_token token; | |
3260 | ||
3261 | btrfs_init_map_token(&token); | |
3262 | /* | |
3263 | * return the space used on disk if this item isn't | |
3264 | * compressed or encoded | |
3265 | */ | |
3266 | if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 && | |
3267 | btrfs_token_file_extent_encryption(eb, fi, &token) == 0 && | |
3268 | btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) { | |
3269 | return btrfs_file_extent_inline_item_len(eb, | |
3270 | btrfs_item_nr(slot)); | |
3271 | } | |
3272 | ||
3273 | /* otherwise use the ram bytes field */ | |
3274 | return btrfs_token_file_extent_ram_bytes(eb, fi, &token); | |
3275 | } | |
3276 | ||
3277 | ||
733f4fbb SB |
3278 | /* btrfs_dev_stats_item */ |
3279 | static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb, | |
3280 | struct btrfs_dev_stats_item *ptr, | |
3281 | int index) | |
3282 | { | |
3283 | u64 val; | |
3284 | ||
3285 | read_extent_buffer(eb, &val, | |
3286 | offsetof(struct btrfs_dev_stats_item, values) + | |
3287 | ((unsigned long)ptr) + (index * sizeof(u64)), | |
3288 | sizeof(val)); | |
3289 | return val; | |
3290 | } | |
3291 | ||
3292 | static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, | |
3293 | struct btrfs_dev_stats_item *ptr, | |
3294 | int index, u64 val) | |
3295 | { | |
3296 | write_extent_buffer(eb, &val, | |
3297 | offsetof(struct btrfs_dev_stats_item, values) + | |
3298 | ((unsigned long)ptr) + (index * sizeof(u64)), | |
3299 | sizeof(val)); | |
3300 | } | |
3301 | ||
630dc772 AJ |
3302 | /* btrfs_qgroup_status_item */ |
3303 | BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, | |
3304 | generation, 64); | |
3305 | BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, | |
3306 | version, 64); | |
3307 | BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, | |
3308 | flags, 64); | |
2f232036 JS |
3309 | BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, |
3310 | rescan, 64); | |
630dc772 AJ |
3311 | |
3312 | /* btrfs_qgroup_info_item */ | |
3313 | BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, | |
3314 | generation, 64); | |
3315 | BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); | |
3316 | BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, | |
3317 | rfer_cmpr, 64); | |
3318 | BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); | |
3319 | BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, | |
3320 | excl_cmpr, 64); | |
3321 | ||
3322 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, | |
3323 | struct btrfs_qgroup_info_item, generation, 64); | |
3324 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, | |
3325 | rfer, 64); | |
3326 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, | |
3327 | struct btrfs_qgroup_info_item, rfer_cmpr, 64); | |
3328 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, | |
3329 | excl, 64); | |
3330 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, | |
3331 | struct btrfs_qgroup_info_item, excl_cmpr, 64); | |
3332 | ||
3333 | /* btrfs_qgroup_limit_item */ | |
3334 | BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, | |
3335 | flags, 64); | |
3336 | BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, | |
3337 | max_rfer, 64); | |
3338 | BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, | |
3339 | max_excl, 64); | |
3340 | BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, | |
3341 | rsv_rfer, 64); | |
3342 | BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, | |
3343 | rsv_excl, 64); | |
3344 | ||
a2bff640 SB |
3345 | /* btrfs_dev_replace_item */ |
3346 | BTRFS_SETGET_FUNCS(dev_replace_src_devid, | |
3347 | struct btrfs_dev_replace_item, src_devid, 64); | |
3348 | BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, | |
3349 | struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, | |
3350 | 64); | |
3351 | BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, | |
3352 | replace_state, 64); | |
3353 | BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, | |
3354 | time_started, 64); | |
3355 | BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, | |
3356 | time_stopped, 64); | |
3357 | BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, | |
3358 | num_write_errors, 64); | |
3359 | BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, | |
3360 | struct btrfs_dev_replace_item, num_uncorrectable_read_errors, | |
3361 | 64); | |
3362 | BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, | |
3363 | cursor_left, 64); | |
3364 | BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, | |
3365 | cursor_right, 64); | |
3366 | ||
3367 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, | |
3368 | struct btrfs_dev_replace_item, src_devid, 64); | |
3369 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, | |
3370 | struct btrfs_dev_replace_item, | |
3371 | cont_reading_from_srcdev_mode, 64); | |
3372 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, | |
3373 | struct btrfs_dev_replace_item, replace_state, 64); | |
3374 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, | |
3375 | struct btrfs_dev_replace_item, time_started, 64); | |
3376 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, | |
3377 | struct btrfs_dev_replace_item, time_stopped, 64); | |
3378 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, | |
3379 | struct btrfs_dev_replace_item, num_write_errors, 64); | |
3380 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, | |
3381 | struct btrfs_dev_replace_item, | |
3382 | num_uncorrectable_read_errors, 64); | |
3383 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, | |
3384 | struct btrfs_dev_replace_item, cursor_left, 64); | |
3385 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, | |
3386 | struct btrfs_dev_replace_item, cursor_right, 64); | |
3387 | ||
815745cf | 3388 | static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) |
e20d96d6 CM |
3389 | { |
3390 | return sb->s_fs_info; | |
3391 | } | |
3392 | ||
4beb1b8b CM |
3393 | /* helper function to cast into the data area of the leaf. */ |
3394 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 | 3395 | ((type *)(btrfs_leaf_data(leaf) + \ |
5f39d397 CM |
3396 | btrfs_item_offset_nr(leaf, slot))) |
3397 | ||
3398 | #define btrfs_item_ptr_offset(leaf, slot) \ | |
3399 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | |
3400 | btrfs_item_offset_nr(leaf, slot))) | |
4beb1b8b | 3401 | |
67377734 JB |
3402 | static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) |
3403 | { | |
3404 | return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && | |
3405 | (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); | |
3406 | } | |
3407 | ||
3b16a4e3 JB |
3408 | static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) |
3409 | { | |
c62d2555 | 3410 | return mapping_gfp_constraint(mapping, ~__GFP_FS); |
3b16a4e3 JB |
3411 | } |
3412 | ||
b18c6685 | 3413 | /* extent-tree.c */ |
28f75a0e CM |
3414 | |
3415 | u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes); | |
3416 | ||
16cdcec7 | 3417 | static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root, |
9e0baf60 | 3418 | unsigned num_items) |
16cdcec7 | 3419 | { |
0138b6fe | 3420 | return root->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; |
07127184 JB |
3421 | } |
3422 | ||
3423 | /* | |
3424 | * Doing a truncate won't result in new nodes or leaves, just what we need for | |
3425 | * COW. | |
3426 | */ | |
3427 | static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root, | |
3428 | unsigned num_items) | |
3429 | { | |
707e8a07 | 3430 | return root->nodesize * BTRFS_MAX_LEVEL * num_items; |
16cdcec7 MX |
3431 | } |
3432 | ||
1be41b78 JB |
3433 | int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans, |
3434 | struct btrfs_root *root); | |
0a2b2a84 JB |
3435 | int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans, |
3436 | struct btrfs_root *root); | |
fa9c0d79 | 3437 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
56bec294 CM |
3438 | int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, |
3439 | struct btrfs_root *root, unsigned long count); | |
a79b7d4b CM |
3440 | int btrfs_async_run_delayed_refs(struct btrfs_root *root, |
3441 | unsigned long count, int wait); | |
1a4ed8fd | 3442 | int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len); |
a22285a6 YZ |
3443 | int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, |
3444 | struct btrfs_root *root, u64 bytenr, | |
3173a18f | 3445 | u64 offset, int metadata, u64 *refs, u64 *flags); |
11833d66 YZ |
3446 | int btrfs_pin_extent(struct btrfs_root *root, |
3447 | u64 bytenr, u64 num, int reserved); | |
dcfac415 | 3448 | int btrfs_pin_extent_for_log_replay(struct btrfs_root *root, |
e688b725 | 3449 | u64 bytenr, u64 num_bytes); |
8c2a1a30 JB |
3450 | int btrfs_exclude_logged_extents(struct btrfs_root *root, |
3451 | struct extent_buffer *eb); | |
80ff3856 | 3452 | int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, |
5d4f98a2 YZ |
3453 | struct btrfs_root *root, |
3454 | u64 objectid, u64 offset, u64 bytenr); | |
d397712b CM |
3455 | struct btrfs_block_group_cache *btrfs_lookup_block_group( |
3456 | struct btrfs_fs_info *info, | |
3457 | u64 bytenr); | |
758f2dfc | 3458 | void btrfs_get_block_group(struct btrfs_block_group_cache *cache); |
5d4f98a2 | 3459 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
6ab0a202 | 3460 | int get_block_group_index(struct btrfs_block_group_cache *cache); |
4d75f8a9 DS |
3461 | struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, |
3462 | struct btrfs_root *root, u64 parent, | |
3463 | u64 root_objectid, | |
5d4f98a2 | 3464 | struct btrfs_disk_key *key, int level, |
5581a51a | 3465 | u64 hint, u64 empty_size); |
f0486c68 YZ |
3466 | void btrfs_free_tree_block(struct btrfs_trans_handle *trans, |
3467 | struct btrfs_root *root, | |
3468 | struct extent_buffer *buf, | |
5581a51a | 3469 | u64 parent, int last_ref); |
5d4f98a2 YZ |
3470 | int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, |
3471 | struct btrfs_root *root, | |
3472 | u64 root_objectid, u64 owner, | |
5846a3c2 QW |
3473 | u64 offset, u64 ram_bytes, |
3474 | struct btrfs_key *ins); | |
5d4f98a2 YZ |
3475 | int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, |
3476 | struct btrfs_root *root, | |
3477 | u64 root_objectid, u64 owner, u64 offset, | |
3478 | struct btrfs_key *ins); | |
00361589 JB |
3479 | int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes, |
3480 | u64 min_alloc_size, u64 empty_size, u64 hint_byte, | |
e570fd27 | 3481 | struct btrfs_key *ins, int is_data, int delalloc); |
e089f05c | 3482 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
e339a6b0 | 3483 | struct extent_buffer *buf, int full_backref); |
5d4f98a2 | 3484 | int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
e339a6b0 | 3485 | struct extent_buffer *buf, int full_backref); |
5d4f98a2 YZ |
3486 | int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, |
3487 | struct btrfs_root *root, | |
3488 | u64 bytenr, u64 num_bytes, u64 flags, | |
b1c79e09 | 3489 | int level, int is_data); |
31840ae1 ZY |
3490 | int btrfs_free_extent(struct btrfs_trans_handle *trans, |
3491 | struct btrfs_root *root, | |
66d7e7f0 | 3492 | u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, |
b06c4bf5 | 3493 | u64 owner, u64 offset); |
5d4f98a2 | 3494 | |
e570fd27 MX |
3495 | int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len, |
3496 | int delalloc); | |
e688b725 CM |
3497 | int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root, |
3498 | u64 start, u64 len); | |
143bede5 JM |
3499 | void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, |
3500 | struct btrfs_root *root); | |
ccd467d6 | 3501 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
11833d66 | 3502 | struct btrfs_root *root); |
b18c6685 | 3503 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
31840ae1 ZY |
3504 | struct btrfs_root *root, |
3505 | u64 bytenr, u64 num_bytes, u64 parent, | |
b06c4bf5 | 3506 | u64 root_objectid, u64 owner, u64 offset); |
5d4f98a2 | 3507 | |
1bbc621e CM |
3508 | int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans, |
3509 | struct btrfs_root *root); | |
9078a3e1 CM |
3510 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
3511 | struct btrfs_root *root); | |
dcdf7f6d JB |
3512 | int btrfs_setup_space_cache(struct btrfs_trans_handle *trans, |
3513 | struct btrfs_root *root); | |
d2fb3437 | 3514 | int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr); |
9078a3e1 CM |
3515 | int btrfs_free_block_groups(struct btrfs_fs_info *info); |
3516 | int btrfs_read_block_groups(struct btrfs_root *root); | |
ba1bf481 | 3517 | int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr); |
0b86a832 CM |
3518 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
3519 | struct btrfs_root *root, u64 bytes_used, | |
e17cade2 | 3520 | u64 type, u64 chunk_objectid, u64 chunk_offset, |
0b86a832 | 3521 | u64 size); |
8eab77ff | 3522 | struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( |
7fd01182 FM |
3523 | struct btrfs_fs_info *fs_info, |
3524 | const u64 chunk_offset); | |
1a40e23b | 3525 | int btrfs_remove_block_group(struct btrfs_trans_handle *trans, |
04216820 FM |
3526 | struct btrfs_root *root, u64 group_start, |
3527 | struct extent_map *em); | |
47ab2a6c | 3528 | void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); |
e33e17ee JM |
3529 | void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); |
3530 | void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); | |
ea658bad JB |
3531 | void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans, |
3532 | struct btrfs_root *root); | |
6d07bcec | 3533 | u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data); |
4184ea7f | 3534 | void btrfs_clear_space_info_full(struct btrfs_fs_info *info); |
08e007d2 MX |
3535 | |
3536 | enum btrfs_reserve_flush_enum { | |
3537 | /* If we are in the transaction, we can't flush anything.*/ | |
3538 | BTRFS_RESERVE_NO_FLUSH, | |
3539 | /* | |
3540 | * Flushing delalloc may cause deadlock somewhere, in this | |
3541 | * case, use FLUSH LIMIT | |
3542 | */ | |
3543 | BTRFS_RESERVE_FLUSH_LIMIT, | |
3544 | BTRFS_RESERVE_FLUSH_ALL, | |
3545 | }; | |
3546 | ||
7cf5b976 | 3547 | int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len); |
4ceff079 | 3548 | int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes); |
7cf5b976 | 3549 | void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len); |
51773bec QW |
3550 | void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, |
3551 | u64 len); | |
a22285a6 YZ |
3552 | void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, |
3553 | struct btrfs_root *root); | |
4fbcdf66 | 3554 | void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); |
d68fc57b YZ |
3555 | int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, |
3556 | struct inode *inode); | |
3557 | void btrfs_orphan_release_metadata(struct inode *inode); | |
d5c12070 MX |
3558 | int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, |
3559 | struct btrfs_block_rsv *rsv, | |
3560 | int nitems, | |
ee3441b4 | 3561 | u64 *qgroup_reserved, bool use_global_rsv); |
d5c12070 MX |
3562 | void btrfs_subvolume_release_metadata(struct btrfs_root *root, |
3563 | struct btrfs_block_rsv *rsv, | |
3564 | u64 qgroup_reserved); | |
0ca1f7ce YZ |
3565 | int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes); |
3566 | void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes); | |
7cf5b976 QW |
3567 | int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len); |
3568 | void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len); | |
66d8f3dd MX |
3569 | void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); |
3570 | struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root, | |
3571 | unsigned short type); | |
f0486c68 YZ |
3572 | void btrfs_free_block_rsv(struct btrfs_root *root, |
3573 | struct btrfs_block_rsv *rsv); | |
cdfb080e | 3574 | void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv); |
4a92b1b8 | 3575 | int btrfs_block_rsv_add(struct btrfs_root *root, |
08e007d2 MX |
3576 | struct btrfs_block_rsv *block_rsv, u64 num_bytes, |
3577 | enum btrfs_reserve_flush_enum flush); | |
4a92b1b8 | 3578 | int btrfs_block_rsv_check(struct btrfs_root *root, |
36ba022a JB |
3579 | struct btrfs_block_rsv *block_rsv, int min_factor); |
3580 | int btrfs_block_rsv_refill(struct btrfs_root *root, | |
08e007d2 MX |
3581 | struct btrfs_block_rsv *block_rsv, u64 min_reserved, |
3582 | enum btrfs_reserve_flush_enum flush); | |
f0486c68 YZ |
3583 | int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, |
3584 | struct btrfs_block_rsv *dst_rsv, | |
3585 | u64 num_bytes); | |
d52be818 JB |
3586 | int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, |
3587 | struct btrfs_block_rsv *dest, u64 num_bytes, | |
3588 | int min_factor); | |
f0486c68 YZ |
3589 | void btrfs_block_rsv_release(struct btrfs_root *root, |
3590 | struct btrfs_block_rsv *block_rsv, | |
3591 | u64 num_bytes); | |
868f401a | 3592 | int btrfs_inc_block_group_ro(struct btrfs_root *root, |
f0486c68 | 3593 | struct btrfs_block_group_cache *cache); |
868f401a | 3594 | void btrfs_dec_block_group_ro(struct btrfs_root *root, |
143bede5 | 3595 | struct btrfs_block_group_cache *cache); |
0af3d00b | 3596 | void btrfs_put_block_group_cache(struct btrfs_fs_info *info); |
6d07bcec | 3597 | u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); |
acce952b | 3598 | int btrfs_error_unpin_extent_range(struct btrfs_root *root, |
3599 | u64 start, u64 end); | |
1edb647b FM |
3600 | int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr, |
3601 | u64 num_bytes, u64 *actual_bytes); | |
c87f08ca CM |
3602 | int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, |
3603 | struct btrfs_root *root, u64 type); | |
f7039b1d | 3604 | int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range); |
acce952b | 3605 | |
c59021f8 | 3606 | int btrfs_init_space_info(struct btrfs_fs_info *fs_info); |
bed92eae AJ |
3607 | int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, |
3608 | struct btrfs_fs_info *fs_info); | |
31e50229 | 3609 | int __get_raid_index(u64 flags); |
9ea24bbe FM |
3610 | int btrfs_start_write_no_snapshoting(struct btrfs_root *root); |
3611 | void btrfs_end_write_no_snapshoting(struct btrfs_root *root); | |
0bc19f90 | 3612 | void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); |
39c2d7fa FM |
3613 | void check_system_chunk(struct btrfs_trans_handle *trans, |
3614 | struct btrfs_root *root, | |
4617ea3a | 3615 | const u64 type); |
a5ed9182 OS |
3616 | u64 add_new_free_space(struct btrfs_block_group_cache *block_group, |
3617 | struct btrfs_fs_info *info, u64 start, u64 end); | |
3618 | ||
dee26a9f | 3619 | /* ctree.c */ |
5d4f98a2 YZ |
3620 | int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, |
3621 | int level, int *slot); | |
3622 | int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); | |
0b86a832 CM |
3623 | int btrfs_previous_item(struct btrfs_root *root, |
3624 | struct btrfs_path *path, u64 min_objectid, | |
3625 | int type); | |
ade2e0b3 WS |
3626 | int btrfs_previous_extent_item(struct btrfs_root *root, |
3627 | struct btrfs_path *path, u64 min_objectid); | |
b7a0365e DD |
3628 | void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, |
3629 | struct btrfs_path *path, | |
143bede5 | 3630 | struct btrfs_key *new_key); |
925baedd CM |
3631 | struct extent_buffer *btrfs_root_node(struct btrfs_root *root); |
3632 | struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); | |
e7a84565 | 3633 | int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, |
3f157a2f | 3634 | struct btrfs_key *key, int lowest_level, |
de78b51a | 3635 | u64 min_trans); |
3f157a2f | 3636 | int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, |
de78b51a | 3637 | struct btrfs_path *path, |
3f157a2f | 3638 | u64 min_trans); |
7069830a AB |
3639 | enum btrfs_compare_tree_result { |
3640 | BTRFS_COMPARE_TREE_NEW, | |
3641 | BTRFS_COMPARE_TREE_DELETED, | |
3642 | BTRFS_COMPARE_TREE_CHANGED, | |
ba5e8f2e | 3643 | BTRFS_COMPARE_TREE_SAME, |
7069830a AB |
3644 | }; |
3645 | typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root, | |
3646 | struct btrfs_root *right_root, | |
3647 | struct btrfs_path *left_path, | |
3648 | struct btrfs_path *right_path, | |
3649 | struct btrfs_key *key, | |
3650 | enum btrfs_compare_tree_result result, | |
3651 | void *ctx); | |
3652 | int btrfs_compare_trees(struct btrfs_root *left_root, | |
3653 | struct btrfs_root *right_root, | |
3654 | btrfs_changed_cb_t cb, void *ctx); | |
5f39d397 CM |
3655 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
3656 | struct btrfs_root *root, struct extent_buffer *buf, | |
3657 | struct extent_buffer *parent, int parent_slot, | |
9fa8cfe7 | 3658 | struct extent_buffer **cow_ret); |
be20aa9d CM |
3659 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
3660 | struct btrfs_root *root, | |
3661 | struct extent_buffer *buf, | |
3662 | struct extent_buffer **cow_ret, u64 new_root_objectid); | |
5d4f98a2 YZ |
3663 | int btrfs_block_can_be_shared(struct btrfs_root *root, |
3664 | struct extent_buffer *buf); | |
4b90c680 | 3665 | void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path, |
143bede5 | 3666 | u32 data_size); |
afe5fea7 | 3667 | void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path, |
143bede5 | 3668 | u32 new_size, int from_end); |
459931ec CM |
3669 | int btrfs_split_item(struct btrfs_trans_handle *trans, |
3670 | struct btrfs_root *root, | |
3671 | struct btrfs_path *path, | |
3672 | struct btrfs_key *new_key, | |
3673 | unsigned long split_offset); | |
ad48fd75 YZ |
3674 | int btrfs_duplicate_item(struct btrfs_trans_handle *trans, |
3675 | struct btrfs_root *root, | |
3676 | struct btrfs_path *path, | |
3677 | struct btrfs_key *new_key); | |
e33d5c3d KN |
3678 | int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, |
3679 | u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); | |
e089f05c CM |
3680 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
3681 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
3682 | ins_len, int cow); | |
5d9e75c4 JS |
3683 | int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key, |
3684 | struct btrfs_path *p, u64 time_seq); | |
2f38b3e1 AJ |
3685 | int btrfs_search_slot_for_read(struct btrfs_root *root, |
3686 | struct btrfs_key *key, struct btrfs_path *p, | |
3687 | int find_higher, int return_any); | |
6702ed49 | 3688 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
5f39d397 | 3689 | struct btrfs_root *root, struct extent_buffer *parent, |
de78b51a | 3690 | int start_slot, u64 *last_ret, |
a6b6e75e | 3691 | struct btrfs_key *progress); |
b3b4aa74 | 3692 | void btrfs_release_path(struct btrfs_path *p); |
2c90e5d6 CM |
3693 | struct btrfs_path *btrfs_alloc_path(void); |
3694 | void btrfs_free_path(struct btrfs_path *p); | |
b4ce94de | 3695 | void btrfs_set_path_blocking(struct btrfs_path *p); |
16cdcec7 | 3696 | void btrfs_clear_path_blocking(struct btrfs_path *p, |
bd681513 | 3697 | struct extent_buffer *held, int held_rw); |
b4ce94de CM |
3698 | void btrfs_unlock_up_safe(struct btrfs_path *p, int level); |
3699 | ||
85e21bac CM |
3700 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
3701 | struct btrfs_path *path, int slot, int nr); | |
85e21bac CM |
3702 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, |
3703 | struct btrfs_root *root, | |
3704 | struct btrfs_path *path) | |
3705 | { | |
3706 | return btrfs_del_items(trans, root, path, path->slots[0], 1); | |
3707 | } | |
3708 | ||
afe5fea7 | 3709 | void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, |
143bede5 JM |
3710 | struct btrfs_key *cpu_key, u32 *data_size, |
3711 | u32 total_data, u32 total_size, int nr); | |
e089f05c CM |
3712 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
3713 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
9c58309d CM |
3714 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
3715 | struct btrfs_root *root, | |
3716 | struct btrfs_path *path, | |
3717 | struct btrfs_key *cpu_key, u32 *data_size, int nr); | |
3718 | ||
3719 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, | |
3720 | struct btrfs_root *root, | |
3721 | struct btrfs_path *path, | |
3722 | struct btrfs_key *key, | |
3723 | u32 data_size) | |
3724 | { | |
3725 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); | |
3726 | } | |
3727 | ||
234b63a0 | 3728 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
16e7549f | 3729 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
3d7806ec JS |
3730 | int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, |
3731 | u64 time_seq); | |
1c8f52a5 AB |
3732 | static inline int btrfs_next_old_item(struct btrfs_root *root, |
3733 | struct btrfs_path *p, u64 time_seq) | |
c7d22a3c JS |
3734 | { |
3735 | ++p->slots[0]; | |
3736 | if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) | |
1c8f52a5 | 3737 | return btrfs_next_old_leaf(root, p, time_seq); |
c7d22a3c JS |
3738 | return 0; |
3739 | } | |
1c8f52a5 AB |
3740 | static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) |
3741 | { | |
3742 | return btrfs_next_old_item(root, p, 0); | |
3743 | } | |
5f39d397 | 3744 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
2c536799 JM |
3745 | int __must_check btrfs_drop_snapshot(struct btrfs_root *root, |
3746 | struct btrfs_block_rsv *block_rsv, | |
3747 | int update_ref, int for_reloc); | |
f82d02d9 YZ |
3748 | int btrfs_drop_subtree(struct btrfs_trans_handle *trans, |
3749 | struct btrfs_root *root, | |
3750 | struct extent_buffer *node, | |
3751 | struct extent_buffer *parent); | |
7841cb28 DS |
3752 | static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) |
3753 | { | |
3754 | /* | |
3755 | * Get synced with close_ctree() | |
3756 | */ | |
3757 | smp_mb(); | |
3758 | return fs_info->closing; | |
3759 | } | |
babbf170 MX |
3760 | |
3761 | /* | |
3762 | * If we remount the fs to be R/O or umount the fs, the cleaner needn't do | |
3763 | * anything except sleeping. This function is used to check the status of | |
3764 | * the fs. | |
3765 | */ | |
3766 | static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root) | |
3767 | { | |
3768 | return (root->fs_info->sb->s_flags & MS_RDONLY || | |
3769 | btrfs_fs_closing(root->fs_info)); | |
3770 | } | |
3771 | ||
6c41761f DS |
3772 | static inline void free_fs_info(struct btrfs_fs_info *fs_info) |
3773 | { | |
837d5b6e | 3774 | kfree(fs_info->balance_ctl); |
6c41761f DS |
3775 | kfree(fs_info->delayed_root); |
3776 | kfree(fs_info->extent_root); | |
3777 | kfree(fs_info->tree_root); | |
3778 | kfree(fs_info->chunk_root); | |
3779 | kfree(fs_info->dev_root); | |
3780 | kfree(fs_info->csum_root); | |
bcef60f2 | 3781 | kfree(fs_info->quota_root); |
d8f98039 | 3782 | kfree(fs_info->uuid_root); |
70f6d82e | 3783 | kfree(fs_info->free_space_root); |
6c41761f DS |
3784 | kfree(fs_info->super_copy); |
3785 | kfree(fs_info->super_for_commit); | |
f667aef6 | 3786 | security_free_mnt_opts(&fs_info->security_opts); |
6c41761f DS |
3787 | kfree(fs_info); |
3788 | } | |
7841cb28 | 3789 | |
097b8a7c JS |
3790 | /* tree mod log functions from ctree.c */ |
3791 | u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, | |
3792 | struct seq_list *elem); | |
3793 | void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, | |
3794 | struct seq_list *elem); | |
5b6602e7 | 3795 | int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); |
097b8a7c | 3796 | |
dee26a9f | 3797 | /* root-item.c */ |
ea9e8b11 | 3798 | int btrfs_find_root_ref(struct btrfs_root *tree_root, |
4df27c4d YZ |
3799 | struct btrfs_path *path, |
3800 | u64 root_id, u64 ref_id); | |
0660b5af CM |
3801 | int btrfs_add_root_ref(struct btrfs_trans_handle *trans, |
3802 | struct btrfs_root *tree_root, | |
4df27c4d YZ |
3803 | u64 root_id, u64 ref_id, u64 dirid, u64 sequence, |
3804 | const char *name, int name_len); | |
3805 | int btrfs_del_root_ref(struct btrfs_trans_handle *trans, | |
3806 | struct btrfs_root *tree_root, | |
3807 | u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, | |
0660b5af | 3808 | const char *name, int name_len); |
e089f05c CM |
3809 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
3810 | struct btrfs_key *key); | |
3811 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
3812 | *root, struct btrfs_key *key, struct btrfs_root_item | |
3813 | *item); | |
b45a9d8b JM |
3814 | int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, |
3815 | struct btrfs_root *root, | |
3816 | struct btrfs_key *key, | |
3817 | struct btrfs_root_item *item); | |
cb517eab MX |
3818 | int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key, |
3819 | struct btrfs_path *path, struct btrfs_root_item *root_item, | |
3820 | struct btrfs_key *root_key); | |
76dda93c | 3821 | int btrfs_find_orphan_roots(struct btrfs_root *tree_root); |
bf5f32ec MF |
3822 | void btrfs_set_root_node(struct btrfs_root_item *item, |
3823 | struct extent_buffer *node); | |
08fe4db1 | 3824 | void btrfs_check_and_init_root_item(struct btrfs_root_item *item); |
8ea05e3a AB |
3825 | void btrfs_update_root_times(struct btrfs_trans_handle *trans, |
3826 | struct btrfs_root *root); | |
08fe4db1 | 3827 | |
07b30a49 SB |
3828 | /* uuid-tree.c */ |
3829 | int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, | |
3830 | struct btrfs_root *uuid_root, u8 *uuid, u8 type, | |
3831 | u64 subid); | |
3832 | int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans, | |
3833 | struct btrfs_root *uuid_root, u8 *uuid, u8 type, | |
3834 | u64 subid); | |
70f80175 SB |
3835 | int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, |
3836 | int (*check_func)(struct btrfs_fs_info *, u8 *, u8, | |
3837 | u64)); | |
07b30a49 | 3838 | |
dee26a9f | 3839 | /* dir-item.c */ |
9c52057c CM |
3840 | int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, |
3841 | const char *name, int name_len); | |
d397712b CM |
3842 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, |
3843 | struct btrfs_root *root, const char *name, | |
16cdcec7 | 3844 | int name_len, struct inode *dir, |
aec7477b | 3845 | struct btrfs_key *location, u8 type, u64 index); |
7e38180e CM |
3846 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
3847 | struct btrfs_root *root, | |
3848 | struct btrfs_path *path, u64 dir, | |
3849 | const char *name, int name_len, | |
3850 | int mod); | |
3851 | struct btrfs_dir_item * | |
3852 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | |
3853 | struct btrfs_root *root, | |
3854 | struct btrfs_path *path, u64 dir, | |
3855 | u64 objectid, const char *name, int name_len, | |
3856 | int mod); | |
4df27c4d YZ |
3857 | struct btrfs_dir_item * |
3858 | btrfs_search_dir_index_item(struct btrfs_root *root, | |
3859 | struct btrfs_path *path, u64 dirid, | |
3860 | const char *name, int name_len); | |
7e38180e CM |
3861 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
3862 | struct btrfs_root *root, | |
3863 | struct btrfs_path *path, | |
3864 | struct btrfs_dir_item *di); | |
5103e947 | 3865 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
f34f57a3 YZ |
3866 | struct btrfs_root *root, |
3867 | struct btrfs_path *path, u64 objectid, | |
3868 | const char *name, u16 name_len, | |
3869 | const void *data, u16 data_len); | |
5103e947 JB |
3870 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, |
3871 | struct btrfs_root *root, | |
3872 | struct btrfs_path *path, u64 dir, | |
3873 | const char *name, u16 name_len, | |
3874 | int mod); | |
22a94d44 JB |
3875 | int verify_dir_item(struct btrfs_root *root, |
3876 | struct extent_buffer *leaf, | |
3877 | struct btrfs_dir_item *dir_item); | |
5f5bc6b1 FM |
3878 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, |
3879 | struct btrfs_path *path, | |
3880 | const char *name, | |
3881 | int name_len); | |
7b128766 JB |
3882 | |
3883 | /* orphan.c */ | |
3884 | int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, | |
3885 | struct btrfs_root *root, u64 offset); | |
3886 | int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, | |
3887 | struct btrfs_root *root, u64 offset); | |
4df27c4d | 3888 | int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); |
7b128766 | 3889 | |
dee26a9f | 3890 | /* inode-item.c */ |
3954401f CM |
3891 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
3892 | struct btrfs_root *root, | |
3893 | const char *name, int name_len, | |
aec7477b | 3894 | u64 inode_objectid, u64 ref_objectid, u64 index); |
3954401f CM |
3895 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, |
3896 | struct btrfs_root *root, | |
3897 | const char *name, int name_len, | |
aec7477b | 3898 | u64 inode_objectid, u64 ref_objectid, u64 *index); |
5f39d397 CM |
3899 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
3900 | struct btrfs_root *root, | |
3901 | struct btrfs_path *path, u64 objectid); | |
293ffd5f | 3902 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
3903 | *root, struct btrfs_path *path, |
3904 | struct btrfs_key *location, int mod); | |
dee26a9f | 3905 | |
f186373f MF |
3906 | struct btrfs_inode_extref * |
3907 | btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, | |
3908 | struct btrfs_root *root, | |
3909 | struct btrfs_path *path, | |
3910 | const char *name, int name_len, | |
3911 | u64 inode_objectid, u64 ref_objectid, int ins_len, | |
3912 | int cow); | |
3913 | ||
3914 | int btrfs_find_name_in_ext_backref(struct btrfs_path *path, | |
3915 | u64 ref_objectid, const char *name, | |
3916 | int name_len, | |
3917 | struct btrfs_inode_extref **extref_ret); | |
3918 | ||
dee26a9f | 3919 | /* file-item.c */ |
facc8a22 | 3920 | struct btrfs_dio_private; |
459931ec CM |
3921 | int btrfs_del_csums(struct btrfs_trans_handle *trans, |
3922 | struct btrfs_root *root, u64 bytenr, u64 len); | |
61b49440 | 3923 | int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, |
d20f7043 | 3924 | struct bio *bio, u32 *dst); |
4b46fce2 | 3925 | int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode, |
23ea8e5a | 3926 | struct bio *bio, u64 logical_offset); |
b18c6685 | 3927 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
c8b97818 CM |
3928 | struct btrfs_root *root, |
3929 | u64 objectid, u64 pos, | |
3930 | u64 disk_offset, u64 disk_num_bytes, | |
3931 | u64 num_bytes, u64 offset, u64 ram_bytes, | |
3932 | u8 compression, u8 encryption, u16 other_encoding); | |
dee26a9f CM |
3933 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
3934 | struct btrfs_root *root, | |
3935 | struct btrfs_path *path, u64 objectid, | |
db94535d | 3936 | u64 bytenr, int mod); |
065631f6 | 3937 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
d20f7043 | 3938 | struct btrfs_root *root, |
e6dcd2dc | 3939 | struct btrfs_ordered_sum *sums); |
3edf7d33 | 3940 | int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, |
d20f7043 | 3941 | struct bio *bio, u64 file_start, int contig); |
a2de733c AJ |
3942 | int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, |
3943 | struct list_head *list, int search_commit); | |
7ffbb598 FM |
3944 | void btrfs_extent_item_to_extent_map(struct inode *inode, |
3945 | const struct btrfs_path *path, | |
3946 | struct btrfs_file_extent_item *fi, | |
3947 | const bool new_inline, | |
3948 | struct extent_map *em); | |
3949 | ||
39279cc3 | 3950 | /* inode.c */ |
8ccf6f19 MX |
3951 | struct btrfs_delalloc_work { |
3952 | struct inode *inode; | |
8ccf6f19 MX |
3953 | int delay_iput; |
3954 | struct completion completion; | |
3955 | struct list_head list; | |
3956 | struct btrfs_work work; | |
3957 | }; | |
3958 | ||
3959 | struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode, | |
651d494a | 3960 | int delay_iput); |
8ccf6f19 MX |
3961 | void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work); |
3962 | ||
b2675157 JB |
3963 | struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page, |
3964 | size_t pg_offset, u64 start, u64 len, | |
3965 | int create); | |
00361589 | 3966 | noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, |
7ee9e440 JB |
3967 | u64 *orig_start, u64 *orig_block_len, |
3968 | u64 *ram_bytes); | |
4881ee5a CM |
3969 | |
3970 | /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ | |
5036f538 | 3971 | #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) |
4881ee5a CM |
3972 | #define ClearPageChecked ClearPageFsMisc |
3973 | #define SetPageChecked SetPageFsMisc | |
3974 | #define PageChecked PageFsMisc | |
3975 | #endif | |
3976 | ||
b6973aa6 LZ |
3977 | /* This forces readahead on a given range of bytes in an inode */ |
3978 | static inline void btrfs_force_ra(struct address_space *mapping, | |
3979 | struct file_ra_state *ra, struct file *file, | |
3980 | pgoff_t offset, unsigned long req_size) | |
3981 | { | |
3982 | page_cache_sync_readahead(mapping, ra, file, offset, req_size); | |
3983 | } | |
3984 | ||
3de4586c CM |
3985 | struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); |
3986 | int btrfs_set_inode_index(struct inode *dir, u64 *index); | |
e02119d5 CM |
3987 | int btrfs_unlink_inode(struct btrfs_trans_handle *trans, |
3988 | struct btrfs_root *root, | |
3989 | struct inode *dir, struct inode *inode, | |
3990 | const char *name, int name_len); | |
3991 | int btrfs_add_link(struct btrfs_trans_handle *trans, | |
3992 | struct inode *parent_inode, struct inode *inode, | |
3993 | const char *name, int name_len, int add_backref, u64 index); | |
4df27c4d YZ |
3994 | int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, |
3995 | struct btrfs_root *root, | |
3996 | struct inode *dir, u64 objectid, | |
3997 | const char *name, int name_len); | |
9703fefe | 3998 | int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, |
2aaa6655 | 3999 | int front); |
e02119d5 CM |
4000 | int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, |
4001 | struct btrfs_root *root, | |
4002 | struct inode *inode, u64 new_size, | |
4003 | u32 min_type); | |
4004 | ||
24bbcf04 | 4005 | int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); |
6c255e67 MX |
4006 | int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput, |
4007 | int nr); | |
2ac55d41 JB |
4008 | int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, |
4009 | struct extent_state **cached_state); | |
d2fb3437 | 4010 | int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, |
63541927 FDBM |
4011 | struct btrfs_root *new_root, |
4012 | struct btrfs_root *parent_root, | |
4013 | u64 new_dirid); | |
64a16701 DW |
4014 | int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset, |
4015 | size_t size, struct bio *bio, | |
4016 | unsigned long bio_flags); | |
c2ec175c | 4017 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); |
9ebefb18 | 4018 | int btrfs_readpage(struct file *file, struct page *page); |
bd555975 | 4019 | void btrfs_evict_inode(struct inode *inode); |
a9185b41 | 4020 | int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); |
39279cc3 CM |
4021 | struct inode *btrfs_alloc_inode(struct super_block *sb); |
4022 | void btrfs_destroy_inode(struct inode *inode); | |
45321ac5 | 4023 | int btrfs_drop_inode(struct inode *inode); |
39279cc3 CM |
4024 | int btrfs_init_cachep(void); |
4025 | void btrfs_destroy_cachep(void); | |
6bf13c0c | 4026 | long btrfs_ioctl_trans_end(struct file *file); |
1a54ef8c | 4027 | struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, |
73f73415 | 4028 | struct btrfs_root *root, int *was_new); |
a52d9a80 | 4029 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
306e16ce | 4030 | size_t pg_offset, u64 start, u64 end, |
a52d9a80 CM |
4031 | int create); |
4032 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
4033 | struct btrfs_root *root, | |
4034 | struct inode *inode); | |
be6aef60 JB |
4035 | int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, |
4036 | struct btrfs_root *root, struct inode *inode); | |
5b21f2ed | 4037 | int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode); |
66b4ffd1 | 4038 | int btrfs_orphan_cleanup(struct btrfs_root *root); |
d68fc57b YZ |
4039 | void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, |
4040 | struct btrfs_root *root); | |
a41ad394 | 4041 | int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); |
143bede5 | 4042 | void btrfs_invalidate_inodes(struct btrfs_root *root); |
24bbcf04 YZ |
4043 | void btrfs_add_delayed_iput(struct inode *inode); |
4044 | void btrfs_run_delayed_iputs(struct btrfs_root *root); | |
efa56464 YZ |
4045 | int btrfs_prealloc_file_range(struct inode *inode, int mode, |
4046 | u64 start, u64 num_bytes, u64 min_size, | |
4047 | loff_t actual_len, u64 *alloc_hint); | |
0af3d00b JB |
4048 | int btrfs_prealloc_file_range_trans(struct inode *inode, |
4049 | struct btrfs_trans_handle *trans, int mode, | |
4050 | u64 start, u64 num_bytes, u64 min_size, | |
4051 | loff_t actual_len, u64 *alloc_hint); | |
b38ef71c | 4052 | int btrfs_inode_check_errors(struct inode *inode); |
82d339d9 | 4053 | extern const struct dentry_operations btrfs_dentry_operations; |
6a3891c5 JB |
4054 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
4055 | void btrfs_test_inode_set_ops(struct inode *inode); | |
4056 | #endif | |
f46b5a66 CH |
4057 | |
4058 | /* ioctl.c */ | |
4059 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); | |
d5131b65 | 4060 | int btrfs_ioctl_get_supported_features(void __user *arg); |
6cbff00f CH |
4061 | void btrfs_update_iflags(struct inode *inode); |
4062 | void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); | |
dd5f9615 | 4063 | int btrfs_is_empty_uuid(u8 *uuid); |
4cb5300b CM |
4064 | int btrfs_defrag_file(struct inode *inode, struct file *file, |
4065 | struct btrfs_ioctl_defrag_range_args *range, | |
4066 | u64 newer_than, unsigned long max_pages); | |
5af3e8cc SB |
4067 | void btrfs_get_block_group_info(struct list_head *groups_list, |
4068 | struct btrfs_ioctl_space_info *space); | |
35a3621b SB |
4069 | void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock, |
4070 | struct btrfs_ioctl_balance_args *bargs); | |
2b3909f8 DW |
4071 | ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen, |
4072 | struct file *dst_file, u64 dst_loff); | |
35a3621b | 4073 | |
39279cc3 | 4074 | /* file.c */ |
9247f317 MX |
4075 | int btrfs_auto_defrag_init(void); |
4076 | void btrfs_auto_defrag_exit(void); | |
4cb5300b CM |
4077 | int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, |
4078 | struct inode *inode); | |
4079 | int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); | |
26176e7c | 4080 | void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); |
02c24a82 | 4081 | int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); |
7014cdb4 JB |
4082 | void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, |
4083 | int skip_pinned); | |
828c0950 | 4084 | extern const struct file_operations btrfs_file_operations; |
5dc562c5 JB |
4085 | int __btrfs_drop_extents(struct btrfs_trans_handle *trans, |
4086 | struct btrfs_root *root, struct inode *inode, | |
4087 | struct btrfs_path *path, u64 start, u64 end, | |
1acae57b FDBM |
4088 | u64 *drop_end, int drop_cache, |
4089 | int replace_extent, | |
4090 | u32 extent_item_size, | |
4091 | int *key_inserted); | |
5dc562c5 JB |
4092 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, |
4093 | struct btrfs_root *root, struct inode *inode, u64 start, | |
2671485d | 4094 | u64 end, int drop_cache); |
d899e052 | 4095 | int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, |
d899e052 | 4096 | struct inode *inode, u64 start, u64 end); |
6bf13c0c | 4097 | int btrfs_release_file(struct inode *inode, struct file *file); |
be1a12a0 JB |
4098 | int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode, |
4099 | struct page **pages, size_t num_pages, | |
4100 | loff_t pos, size_t write_bytes, | |
4101 | struct extent_state **cached); | |
728404da | 4102 | int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); |
3db11b2e ZB |
4103 | ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in, |
4104 | struct file *file_out, loff_t pos_out, | |
4105 | size_t len, unsigned int flags); | |
04b38d60 CH |
4106 | int btrfs_clone_file_range(struct file *file_in, loff_t pos_in, |
4107 | struct file *file_out, loff_t pos_out, u64 len); | |
6bf13c0c | 4108 | |
6702ed49 CM |
4109 | /* tree-defrag.c */ |
4110 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | |
de78b51a | 4111 | struct btrfs_root *root); |
58176a96 JB |
4112 | |
4113 | /* sysfs.c */ | |
4114 | int btrfs_init_sysfs(void); | |
4115 | void btrfs_exit_sysfs(void); | |
96f3136e | 4116 | int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); |
6618a59b | 4117 | void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); |
58176a96 | 4118 | |
5103e947 JB |
4119 | /* xattr.c */ |
4120 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
6099afe8 | 4121 | |
edbd8d4e | 4122 | /* super.c */ |
96da0919 QW |
4123 | int btrfs_parse_options(struct btrfs_root *root, char *options, |
4124 | unsigned long new_flags); | |
6bf13c0c | 4125 | int btrfs_sync_fs(struct super_block *sb, int wait); |
533574c6 JP |
4126 | |
4127 | #ifdef CONFIG_PRINTK | |
4128 | __printf(2, 3) | |
c2cf52eb | 4129 | void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); |
533574c6 JP |
4130 | #else |
4131 | static inline __printf(2, 3) | |
c2cf52eb | 4132 | void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) |
533574c6 JP |
4133 | { |
4134 | } | |
4135 | #endif | |
4136 | ||
c2cf52eb SK |
4137 | #define btrfs_emerg(fs_info, fmt, args...) \ |
4138 | btrfs_printk(fs_info, KERN_EMERG fmt, ##args) | |
4139 | #define btrfs_alert(fs_info, fmt, args...) \ | |
4140 | btrfs_printk(fs_info, KERN_ALERT fmt, ##args) | |
4141 | #define btrfs_crit(fs_info, fmt, args...) \ | |
4142 | btrfs_printk(fs_info, KERN_CRIT fmt, ##args) | |
4143 | #define btrfs_err(fs_info, fmt, args...) \ | |
4144 | btrfs_printk(fs_info, KERN_ERR fmt, ##args) | |
4145 | #define btrfs_warn(fs_info, fmt, args...) \ | |
4146 | btrfs_printk(fs_info, KERN_WARNING fmt, ##args) | |
4147 | #define btrfs_notice(fs_info, fmt, args...) \ | |
4148 | btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) | |
4149 | #define btrfs_info(fs_info, fmt, args...) \ | |
4150 | btrfs_printk(fs_info, KERN_INFO fmt, ##args) | |
27a0dd61 | 4151 | |
08a84e25 DS |
4152 | /* |
4153 | * Wrappers that use printk_in_rcu | |
4154 | */ | |
4155 | #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ | |
4156 | btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) | |
4157 | #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ | |
4158 | btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) | |
4159 | #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ | |
4160 | btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) | |
4161 | #define btrfs_err_in_rcu(fs_info, fmt, args...) \ | |
4162 | btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) | |
4163 | #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ | |
4164 | btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) | |
4165 | #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ | |
4166 | btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) | |
4167 | #define btrfs_info_in_rcu(fs_info, fmt, args...) \ | |
4168 | btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) | |
4169 | ||
24aa6b41 DS |
4170 | /* |
4171 | * Wrappers that use a ratelimited printk_in_rcu | |
4172 | */ | |
4173 | #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ | |
4174 | btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) | |
4175 | #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ | |
4176 | btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) | |
4177 | #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ | |
4178 | btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) | |
4179 | #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ | |
4180 | btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) | |
4181 | #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ | |
4182 | btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) | |
4183 | #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ | |
4184 | btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) | |
4185 | #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ | |
4186 | btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) | |
4187 | ||
1dd6d7ca DS |
4188 | /* |
4189 | * Wrappers that use a ratelimited printk | |
4190 | */ | |
4191 | #define btrfs_emerg_rl(fs_info, fmt, args...) \ | |
4192 | btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) | |
4193 | #define btrfs_alert_rl(fs_info, fmt, args...) \ | |
4194 | btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) | |
4195 | #define btrfs_crit_rl(fs_info, fmt, args...) \ | |
4196 | btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) | |
4197 | #define btrfs_err_rl(fs_info, fmt, args...) \ | |
4198 | btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) | |
4199 | #define btrfs_warn_rl(fs_info, fmt, args...) \ | |
4200 | btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) | |
4201 | #define btrfs_notice_rl(fs_info, fmt, args...) \ | |
4202 | btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) | |
4203 | #define btrfs_info_rl(fs_info, fmt, args...) \ | |
4204 | btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) | |
27a0dd61 | 4205 | #ifdef DEBUG |
c2cf52eb SK |
4206 | #define btrfs_debug(fs_info, fmt, args...) \ |
4207 | btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) | |
08a84e25 DS |
4208 | #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ |
4209 | btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) | |
24aa6b41 DS |
4210 | #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ |
4211 | btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) | |
1dd6d7ca DS |
4212 | #define btrfs_debug_rl(fs_info, fmt, args...) \ |
4213 | btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) | |
27a0dd61 FH |
4214 | #else |
4215 | #define btrfs_debug(fs_info, fmt, args...) \ | |
4216 | no_printk(KERN_DEBUG fmt, ##args) | |
08a84e25 DS |
4217 | #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ |
4218 | no_printk(KERN_DEBUG fmt, ##args) | |
24aa6b41 DS |
4219 | #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ |
4220 | no_printk(KERN_DEBUG fmt, ##args) | |
1dd6d7ca DS |
4221 | #define btrfs_debug_rl(fs_info, fmt, args...) \ |
4222 | no_printk(KERN_DEBUG fmt, ##args) | |
27a0dd61 | 4223 | #endif |
c2cf52eb | 4224 | |
08a84e25 DS |
4225 | #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ |
4226 | do { \ | |
4227 | rcu_read_lock(); \ | |
4228 | btrfs_printk(fs_info, fmt, ##args); \ | |
4229 | rcu_read_unlock(); \ | |
4230 | } while (0) | |
4231 | ||
24aa6b41 DS |
4232 | #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ |
4233 | do { \ | |
4234 | static DEFINE_RATELIMIT_STATE(_rs, \ | |
4235 | DEFAULT_RATELIMIT_INTERVAL, \ | |
4236 | DEFAULT_RATELIMIT_BURST); \ | |
4237 | if (__ratelimit(&_rs)) \ | |
4238 | btrfs_printk(fs_info, fmt, ##args); \ | |
4239 | } while (0) | |
4240 | ||
4241 | #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ | |
4242 | do { \ | |
4243 | rcu_read_lock(); \ | |
4244 | btrfs_printk_ratelimited(fs_info, fmt, ##args); \ | |
4245 | rcu_read_unlock(); \ | |
4246 | } while (0) | |
4247 | ||
2e17c7c6 JB |
4248 | #ifdef CONFIG_BTRFS_ASSERT |
4249 | ||
c0d19e2b | 4250 | __cold |
2e17c7c6 JB |
4251 | static inline void assfail(char *expr, char *file, int line) |
4252 | { | |
efe120a0 | 4253 | pr_err("BTRFS: assertion failed: %s, file: %s, line: %d", |
2e17c7c6 JB |
4254 | expr, file, line); |
4255 | BUG(); | |
4256 | } | |
4257 | ||
4258 | #define ASSERT(expr) \ | |
4259 | (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) | |
4260 | #else | |
4261 | #define ASSERT(expr) ((void)0) | |
4262 | #endif | |
4263 | ||
4264 | #define btrfs_assert() | |
533574c6 | 4265 | __printf(5, 6) |
c0d19e2b | 4266 | __cold |
acce952b | 4267 | void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function, |
4da35113 | 4268 | unsigned int line, int errno, const char *fmt, ...); |
acce952b | 4269 | |
e33e17ee | 4270 | const char *btrfs_decode_error(int errno); |
533574c6 | 4271 | |
c0d19e2b | 4272 | __cold |
49b25e05 JM |
4273 | void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, |
4274 | struct btrfs_root *root, const char *function, | |
4275 | unsigned int line, int errno); | |
4276 | ||
2b0ce2c2 MH |
4277 | #define btrfs_set_fs_incompat(__fs_info, opt) \ |
4278 | __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) | |
4279 | ||
4280 | static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, | |
4281 | u64 flag) | |
4282 | { | |
4283 | struct btrfs_super_block *disk_super; | |
4284 | u64 features; | |
4285 | ||
4286 | disk_super = fs_info->super_copy; | |
4287 | features = btrfs_super_incompat_flags(disk_super); | |
4288 | if (!(features & flag)) { | |
ceda0864 MX |
4289 | spin_lock(&fs_info->super_lock); |
4290 | features = btrfs_super_incompat_flags(disk_super); | |
4291 | if (!(features & flag)) { | |
4292 | features |= flag; | |
4293 | btrfs_set_super_incompat_flags(disk_super, features); | |
efe120a0 | 4294 | btrfs_info(fs_info, "setting %llu feature flag", |
ceda0864 MX |
4295 | flag); |
4296 | } | |
4297 | spin_unlock(&fs_info->super_lock); | |
2b0ce2c2 MH |
4298 | } |
4299 | } | |
4300 | ||
1abfbcdf OS |
4301 | #define btrfs_clear_fs_incompat(__fs_info, opt) \ |
4302 | __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) | |
4303 | ||
4304 | static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, | |
4305 | u64 flag) | |
4306 | { | |
4307 | struct btrfs_super_block *disk_super; | |
4308 | u64 features; | |
4309 | ||
4310 | disk_super = fs_info->super_copy; | |
4311 | features = btrfs_super_incompat_flags(disk_super); | |
4312 | if (features & flag) { | |
4313 | spin_lock(&fs_info->super_lock); | |
4314 | features = btrfs_super_incompat_flags(disk_super); | |
4315 | if (features & flag) { | |
4316 | features &= ~flag; | |
4317 | btrfs_set_super_incompat_flags(disk_super, features); | |
4318 | btrfs_info(fs_info, "clearing %llu feature flag", | |
4319 | flag); | |
4320 | } | |
4321 | spin_unlock(&fs_info->super_lock); | |
4322 | } | |
4323 | } | |
4324 | ||
3173a18f JB |
4325 | #define btrfs_fs_incompat(fs_info, opt) \ |
4326 | __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) | |
4327 | ||
9780c497 | 4328 | static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) |
3173a18f JB |
4329 | { |
4330 | struct btrfs_super_block *disk_super; | |
4331 | disk_super = fs_info->super_copy; | |
4332 | return !!(btrfs_super_incompat_flags(disk_super) & flag); | |
4333 | } | |
4334 | ||
1abfbcdf OS |
4335 | #define btrfs_set_fs_compat_ro(__fs_info, opt) \ |
4336 | __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) | |
4337 | ||
4338 | static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, | |
4339 | u64 flag) | |
4340 | { | |
4341 | struct btrfs_super_block *disk_super; | |
4342 | u64 features; | |
4343 | ||
4344 | disk_super = fs_info->super_copy; | |
4345 | features = btrfs_super_compat_ro_flags(disk_super); | |
4346 | if (!(features & flag)) { | |
4347 | spin_lock(&fs_info->super_lock); | |
4348 | features = btrfs_super_compat_ro_flags(disk_super); | |
4349 | if (!(features & flag)) { | |
4350 | features |= flag; | |
4351 | btrfs_set_super_compat_ro_flags(disk_super, features); | |
4352 | btrfs_info(fs_info, "setting %llu ro feature flag", | |
4353 | flag); | |
4354 | } | |
4355 | spin_unlock(&fs_info->super_lock); | |
4356 | } | |
4357 | } | |
4358 | ||
4359 | #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ | |
4360 | __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) | |
4361 | ||
4362 | static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, | |
4363 | u64 flag) | |
4364 | { | |
4365 | struct btrfs_super_block *disk_super; | |
4366 | u64 features; | |
4367 | ||
4368 | disk_super = fs_info->super_copy; | |
4369 | features = btrfs_super_compat_ro_flags(disk_super); | |
4370 | if (features & flag) { | |
4371 | spin_lock(&fs_info->super_lock); | |
4372 | features = btrfs_super_compat_ro_flags(disk_super); | |
4373 | if (features & flag) { | |
4374 | features &= ~flag; | |
4375 | btrfs_set_super_compat_ro_flags(disk_super, features); | |
4376 | btrfs_info(fs_info, "clearing %llu ro feature flag", | |
4377 | flag); | |
4378 | } | |
4379 | spin_unlock(&fs_info->super_lock); | |
4380 | } | |
4381 | } | |
4382 | ||
4383 | #define btrfs_fs_compat_ro(fs_info, opt) \ | |
4384 | __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) | |
4385 | ||
4386 | static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) | |
4387 | { | |
4388 | struct btrfs_super_block *disk_super; | |
4389 | disk_super = fs_info->super_copy; | |
4390 | return !!(btrfs_super_compat_ro_flags(disk_super) & flag); | |
4391 | } | |
4392 | ||
005d6427 DS |
4393 | /* |
4394 | * Call btrfs_abort_transaction as early as possible when an error condition is | |
4395 | * detected, that way the exact line number is reported. | |
4396 | */ | |
49b25e05 JM |
4397 | #define btrfs_abort_transaction(trans, root, errno) \ |
4398 | do { \ | |
1a9a8a71 DS |
4399 | /* Report first abort since mount */ \ |
4400 | if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ | |
4401 | &((root)->fs_info->fs_state))) { \ | |
4402 | WARN(1, KERN_DEBUG \ | |
4403 | "BTRFS: Transaction aborted (error %d)\n", \ | |
4404 | (errno)); \ | |
4405 | } \ | |
4406 | __btrfs_abort_transaction((trans), (root), __func__, \ | |
4407 | __LINE__, (errno)); \ | |
49b25e05 | 4408 | } while (0) |
acce952b | 4409 | |
a4553fef | 4410 | #define btrfs_std_error(fs_info, errno, fmt, args...) \ |
4da35113 JM |
4411 | do { \ |
4412 | __btrfs_std_error((fs_info), __func__, __LINE__, \ | |
4413 | (errno), fmt, ##args); \ | |
acce952b | 4414 | } while (0) |
33268eaf | 4415 | |
533574c6 | 4416 | __printf(5, 6) |
c0d19e2b | 4417 | __cold |
8c342930 JM |
4418 | void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, |
4419 | unsigned int line, int errno, const char *fmt, ...); | |
4420 | ||
aa43a17c ES |
4421 | /* |
4422 | * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic | |
4423 | * will panic(). Otherwise we BUG() here. | |
4424 | */ | |
8c342930 JM |
4425 | #define btrfs_panic(fs_info, errno, fmt, args...) \ |
4426 | do { \ | |
aa43a17c ES |
4427 | __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ |
4428 | BUG(); \ | |
acce952b | 4429 | } while (0) |
33268eaf JB |
4430 | |
4431 | /* acl.c */ | |
0eda294d | 4432 | #ifdef CONFIG_BTRFS_FS_POSIX_ACL |
4e34e719 | 4433 | struct posix_acl *btrfs_get_acl(struct inode *inode, int type); |
996a710d | 4434 | int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); |
f34f57a3 YZ |
4435 | int btrfs_init_acl(struct btrfs_trans_handle *trans, |
4436 | struct inode *inode, struct inode *dir); | |
9b89d95a | 4437 | #else |
ed8f3737 | 4438 | #define btrfs_get_acl NULL |
996a710d | 4439 | #define btrfs_set_acl NULL |
9b89d95a LZ |
4440 | static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, |
4441 | struct inode *inode, struct inode *dir) | |
4442 | { | |
4443 | return 0; | |
4444 | } | |
9b89d95a | 4445 | #endif |
0f9dd46c | 4446 | |
5d4f98a2 YZ |
4447 | /* relocation.c */ |
4448 | int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start); | |
4449 | int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, | |
4450 | struct btrfs_root *root); | |
4451 | int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, | |
4452 | struct btrfs_root *root); | |
4453 | int btrfs_recover_relocation(struct btrfs_root *root); | |
4454 | int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); | |
83d4cfd4 JB |
4455 | int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, |
4456 | struct btrfs_root *root, struct extent_buffer *buf, | |
4457 | struct extent_buffer *cow); | |
147d256e | 4458 | void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, |
3fd0a558 | 4459 | u64 *bytes_to_reserve); |
49b25e05 | 4460 | int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, |
3fd0a558 | 4461 | struct btrfs_pending_snapshot *pending); |
a2de733c AJ |
4462 | |
4463 | /* scrub.c */ | |
aa1b8cd4 SB |
4464 | int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, |
4465 | u64 end, struct btrfs_scrub_progress *progress, | |
63a212ab | 4466 | int readonly, int is_dev_replace); |
143bede5 | 4467 | void btrfs_scrub_pause(struct btrfs_root *root); |
143bede5 | 4468 | void btrfs_scrub_continue(struct btrfs_root *root); |
aa1b8cd4 SB |
4469 | int btrfs_scrub_cancel(struct btrfs_fs_info *info); |
4470 | int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, | |
4471 | struct btrfs_device *dev); | |
a2de733c AJ |
4472 | int btrfs_scrub_progress(struct btrfs_root *root, u64 devid, |
4473 | struct btrfs_scrub_progress *progress); | |
c404e0dc MX |
4474 | |
4475 | /* dev-replace.c */ | |
4476 | void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); | |
4477 | void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); | |
4245215d MX |
4478 | void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); |
4479 | ||
4480 | static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) | |
4481 | { | |
4482 | btrfs_bio_counter_sub(fs_info, 1); | |
4483 | } | |
a2de733c | 4484 | |
7414a03f AJ |
4485 | /* reada.c */ |
4486 | struct reada_control { | |
4487 | struct btrfs_root *root; /* tree to prefetch */ | |
4488 | struct btrfs_key key_start; | |
4489 | struct btrfs_key key_end; /* exclusive */ | |
4490 | atomic_t elems; | |
4491 | struct kref refcnt; | |
4492 | wait_queue_head_t wait; | |
4493 | }; | |
4494 | struct reada_control *btrfs_reada_add(struct btrfs_root *root, | |
4495 | struct btrfs_key *start, struct btrfs_key *end); | |
4496 | int btrfs_reada_wait(void *handle); | |
4497 | void btrfs_reada_detach(void *handle); | |
02873e43 ZL |
4498 | int btree_readahead_hook(struct btrfs_fs_info *fs_info, |
4499 | struct extent_buffer *eb, u64 start, int err); | |
7414a03f | 4500 | |
95a06077 JS |
4501 | static inline int is_fstree(u64 rootid) |
4502 | { | |
4503 | if (rootid == BTRFS_FS_TREE_OBJECTID || | |
e09fe2d2 QW |
4504 | ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && |
4505 | !btrfs_qgroup_level(rootid))) | |
95a06077 JS |
4506 | return 1; |
4507 | return 0; | |
4508 | } | |
210549eb DS |
4509 | |
4510 | static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) | |
4511 | { | |
4512 | return signal_pending(current); | |
4513 | } | |
4514 | ||
aaedb55b JB |
4515 | /* Sanity test specific functions */ |
4516 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS | |
4517 | void btrfs_test_destroy_inode(struct inode *inode); | |
4518 | #endif | |
210549eb | 4519 | |
fccb84c9 DS |
4520 | static inline int btrfs_test_is_dummy_root(struct btrfs_root *root) |
4521 | { | |
4522 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS | |
4523 | if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state))) | |
4524 | return 1; | |
4525 | #endif | |
4526 | return 0; | |
4527 | } | |
4528 | ||
eb60ceac | 4529 | #endif |