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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> |
58176a96 | 26 | #include <linux/completion.h> |
04160088 | 27 | #include <linux/backing-dev.h> |
e6dcd2dc | 28 | #include <linux/wait.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
f8b18087 | 30 | #include <linux/kobject.h> |
1abe9b8a | 31 | #include <trace/events/btrfs.h> |
479965d6 | 32 | #include <asm/kmap_types.h> |
3b16a4e3 | 33 | #include <linux/pagemap.h> |
d1310b2e | 34 | #include "extent_io.h" |
5f39d397 | 35 | #include "extent_map.h" |
8b712842 | 36 | #include "async-thread.h" |
a2de733c | 37 | #include "ioctl.h" |
e20d96d6 | 38 | |
e089f05c | 39 | struct btrfs_trans_handle; |
79154b1b | 40 | struct btrfs_transaction; |
a22285a6 | 41 | struct btrfs_pending_snapshot; |
35b7e476 CM |
42 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
43 | extern struct kmem_cache *btrfs_transaction_cachep; | |
44 | extern struct kmem_cache *btrfs_bit_radix_cachep; | |
2c90e5d6 | 45 | extern struct kmem_cache *btrfs_path_cachep; |
dc89e982 | 46 | extern struct kmem_cache *btrfs_free_space_cachep; |
e6dcd2dc | 47 | struct btrfs_ordered_sum; |
e089f05c | 48 | |
2a7108ad | 49 | #define BTRFS_MAGIC "_BHRfS_M" |
eb60ceac | 50 | |
94598ba8 SB |
51 | #define BTRFS_MAX_MIRRORS 2 |
52 | ||
4008c04a | 53 | #define BTRFS_MAX_LEVEL 8 |
0b86a832 | 54 | |
5d4f98a2 YZ |
55 | #define BTRFS_COMPAT_EXTENT_TREE_V0 |
56 | ||
5a3f23d5 CM |
57 | /* |
58 | * files bigger than this get some pre-flushing when they are added | |
59 | * to the ordered operations list. That way we limit the total | |
60 | * work done by the commit | |
61 | */ | |
62 | #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024) | |
63 | ||
0b86a832 | 64 | /* holds pointers to all of the tree roots */ |
6407bf6d | 65 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
0b86a832 CM |
66 | |
67 | /* stores information about which extents are in use, and reference counts */ | |
0cf6c620 | 68 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
0b86a832 | 69 | |
0b86a832 CM |
70 | /* |
71 | * chunk tree stores translations from logical -> physical block numbering | |
72 | * the super block points to the chunk tree | |
73 | */ | |
e085def2 | 74 | #define BTRFS_CHUNK_TREE_OBJECTID 3ULL |
0b86a832 CM |
75 | |
76 | /* | |
77 | * stores information about which areas of a given device are in use. | |
78 | * one per device. The tree of tree roots points to the device tree | |
79 | */ | |
e085def2 CM |
80 | #define BTRFS_DEV_TREE_OBJECTID 4ULL |
81 | ||
82 | /* one per subvolume, storing files and directories */ | |
83 | #define BTRFS_FS_TREE_OBJECTID 5ULL | |
84 | ||
85 | /* directory objectid inside the root tree */ | |
86 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL | |
0b86a832 | 87 | |
d20f7043 CM |
88 | /* holds checksums of all the data extents */ |
89 | #define BTRFS_CSUM_TREE_OBJECTID 7ULL | |
90 | ||
0940ebf6 ID |
91 | /* for storing balance parameters in the root tree */ |
92 | #define BTRFS_BALANCE_OBJECTID -4ULL | |
93 | ||
7b128766 JB |
94 | /* orhpan objectid for tracking unlinked/truncated files */ |
95 | #define BTRFS_ORPHAN_OBJECTID -5ULL | |
96 | ||
e02119d5 CM |
97 | /* does write ahead logging to speed up fsyncs */ |
98 | #define BTRFS_TREE_LOG_OBJECTID -6ULL | |
99 | #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL | |
100 | ||
e4657689 ZY |
101 | /* for space balancing */ |
102 | #define BTRFS_TREE_RELOC_OBJECTID -8ULL | |
103 | #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL | |
104 | ||
d20f7043 CM |
105 | /* |
106 | * extent checksums all have this objectid | |
107 | * this allows them to share the logging tree | |
108 | * for fsyncs | |
109 | */ | |
110 | #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL | |
111 | ||
0af3d00b JB |
112 | /* For storing free space cache */ |
113 | #define BTRFS_FREE_SPACE_OBJECTID -11ULL | |
114 | ||
82d5902d LZ |
115 | /* |
116 | * The inode number assigned to the special inode for sotring | |
117 | * free ino cache | |
118 | */ | |
119 | #define BTRFS_FREE_INO_OBJECTID -12ULL | |
120 | ||
31840ae1 ZY |
121 | /* dummy objectid represents multiple objectids */ |
122 | #define BTRFS_MULTIPLE_OBJECTIDS -255ULL | |
123 | ||
0b86a832 | 124 | /* |
6527cdbe | 125 | * All files have objectids in this range. |
0b86a832 | 126 | */ |
f6dbff55 | 127 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
6527cdbe | 128 | #define BTRFS_LAST_FREE_OBJECTID -256ULL |
e17cade2 | 129 | #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL |
3768f368 | 130 | |
0b86a832 CM |
131 | |
132 | /* | |
133 | * the device items go into the chunk tree. The key is in the form | |
134 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] | |
135 | */ | |
136 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL | |
137 | ||
4df27c4d YZ |
138 | #define BTRFS_BTREE_INODE_OBJECTID 1 |
139 | ||
140 | #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2 | |
141 | ||
727011e0 CM |
142 | /* |
143 | * the max metadata block size. This limit is somewhat artificial, | |
144 | * but the memmove costs go through the roof for larger blocks. | |
145 | */ | |
146 | #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 | |
147 | ||
e20d96d6 CM |
148 | /* |
149 | * we can actually store much bigger names, but lets not confuse the rest | |
150 | * of linux | |
151 | */ | |
152 | #define BTRFS_NAME_LEN 255 | |
153 | ||
f254e52c CM |
154 | /* 32 bytes in various csum fields */ |
155 | #define BTRFS_CSUM_SIZE 32 | |
607d432d JB |
156 | |
157 | /* csum types */ | |
158 | #define BTRFS_CSUM_TYPE_CRC32 0 | |
159 | ||
160 | static int btrfs_csum_sizes[] = { 4, 0 }; | |
161 | ||
509659cd | 162 | /* four bytes for CRC32 */ |
3954401f | 163 | #define BTRFS_EMPTY_DIR_SIZE 0 |
f254e52c | 164 | |
fabb5681 CM |
165 | #define BTRFS_FT_UNKNOWN 0 |
166 | #define BTRFS_FT_REG_FILE 1 | |
167 | #define BTRFS_FT_DIR 2 | |
168 | #define BTRFS_FT_CHRDEV 3 | |
169 | #define BTRFS_FT_BLKDEV 4 | |
170 | #define BTRFS_FT_FIFO 5 | |
171 | #define BTRFS_FT_SOCK 6 | |
172 | #define BTRFS_FT_SYMLINK 7 | |
5103e947 JB |
173 | #define BTRFS_FT_XATTR 8 |
174 | #define BTRFS_FT_MAX 9 | |
fabb5681 | 175 | |
3d136a11 SB |
176 | /* ioprio of readahead is set to idle */ |
177 | #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) | |
178 | ||
fec577fb | 179 | /* |
d4a78947 WF |
180 | * The key defines the order in the tree, and so it also defines (optimal) |
181 | * block layout. | |
182 | * | |
183 | * objectid corresponds to the inode number. | |
184 | * | |
185 | * type tells us things about the object, and is a kind of stream selector. | |
186 | * so for a given inode, keys with type of 1 might refer to the inode data, | |
187 | * type of 2 may point to file data in the btree and type == 3 may point to | |
188 | * extents. | |
fec577fb CM |
189 | * |
190 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
191 | * |
192 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
193 | * in cpu native order. Otherwise they are identical and their sizes | |
194 | * should be the same (ie both packed) | |
fec577fb | 195 | */ |
e2fa7227 CM |
196 | struct btrfs_disk_key { |
197 | __le64 objectid; | |
5f39d397 | 198 | u8 type; |
70b2befd | 199 | __le64 offset; |
e2fa7227 CM |
200 | } __attribute__ ((__packed__)); |
201 | ||
202 | struct btrfs_key { | |
eb60ceac | 203 | u64 objectid; |
5f39d397 | 204 | u8 type; |
70b2befd | 205 | u64 offset; |
eb60ceac CM |
206 | } __attribute__ ((__packed__)); |
207 | ||
0b86a832 CM |
208 | struct btrfs_mapping_tree { |
209 | struct extent_map_tree map_tree; | |
210 | }; | |
211 | ||
0b86a832 CM |
212 | struct btrfs_dev_item { |
213 | /* the internal btrfs device id */ | |
214 | __le64 devid; | |
215 | ||
216 | /* size of the device */ | |
217 | __le64 total_bytes; | |
218 | ||
219 | /* bytes used */ | |
220 | __le64 bytes_used; | |
221 | ||
222 | /* optimal io alignment for this device */ | |
223 | __le32 io_align; | |
224 | ||
225 | /* optimal io width for this device */ | |
226 | __le32 io_width; | |
227 | ||
228 | /* minimal io size for this device */ | |
229 | __le32 sector_size; | |
230 | ||
0b86a832 CM |
231 | /* type and info about this device */ |
232 | __le64 type; | |
233 | ||
2b82032c YZ |
234 | /* expected generation for this device */ |
235 | __le64 generation; | |
236 | ||
c3027eb5 CM |
237 | /* |
238 | * starting byte of this partition on the device, | |
d4a78947 | 239 | * to allow for stripe alignment in the future |
c3027eb5 CM |
240 | */ |
241 | __le64 start_offset; | |
242 | ||
e17cade2 CM |
243 | /* grouping information for allocation decisions */ |
244 | __le32 dev_group; | |
245 | ||
246 | /* seek speed 0-100 where 100 is fastest */ | |
247 | u8 seek_speed; | |
248 | ||
249 | /* bandwidth 0-100 where 100 is fastest */ | |
250 | u8 bandwidth; | |
251 | ||
0d81ba5d | 252 | /* btrfs generated uuid for this device */ |
e17cade2 | 253 | u8 uuid[BTRFS_UUID_SIZE]; |
2b82032c YZ |
254 | |
255 | /* uuid of FS who owns this device */ | |
256 | u8 fsid[BTRFS_UUID_SIZE]; | |
0b86a832 CM |
257 | } __attribute__ ((__packed__)); |
258 | ||
259 | struct btrfs_stripe { | |
260 | __le64 devid; | |
261 | __le64 offset; | |
e17cade2 | 262 | u8 dev_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
263 | } __attribute__ ((__packed__)); |
264 | ||
265 | struct btrfs_chunk { | |
e17cade2 CM |
266 | /* size of this chunk in bytes */ |
267 | __le64 length; | |
268 | ||
269 | /* objectid of the root referencing this chunk */ | |
0b86a832 | 270 | __le64 owner; |
e17cade2 | 271 | |
0b86a832 CM |
272 | __le64 stripe_len; |
273 | __le64 type; | |
274 | ||
275 | /* optimal io alignment for this chunk */ | |
276 | __le32 io_align; | |
277 | ||
278 | /* optimal io width for this chunk */ | |
279 | __le32 io_width; | |
280 | ||
281 | /* minimal io size for this chunk */ | |
282 | __le32 sector_size; | |
283 | ||
284 | /* 2^16 stripes is quite a lot, a second limit is the size of a single | |
285 | * item in the btree | |
286 | */ | |
287 | __le16 num_stripes; | |
321aecc6 CM |
288 | |
289 | /* sub stripes only matter for raid10 */ | |
290 | __le16 sub_stripes; | |
0b86a832 CM |
291 | struct btrfs_stripe stripe; |
292 | /* additional stripes go here */ | |
293 | } __attribute__ ((__packed__)); | |
294 | ||
0af3d00b JB |
295 | #define BTRFS_FREE_SPACE_EXTENT 1 |
296 | #define BTRFS_FREE_SPACE_BITMAP 2 | |
297 | ||
298 | struct btrfs_free_space_entry { | |
299 | __le64 offset; | |
300 | __le64 bytes; | |
301 | u8 type; | |
302 | } __attribute__ ((__packed__)); | |
303 | ||
304 | struct btrfs_free_space_header { | |
305 | struct btrfs_disk_key location; | |
306 | __le64 generation; | |
307 | __le64 num_entries; | |
308 | __le64 num_bitmaps; | |
309 | } __attribute__ ((__packed__)); | |
310 | ||
0b86a832 CM |
311 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) |
312 | { | |
313 | BUG_ON(num_stripes == 0); | |
314 | return sizeof(struct btrfs_chunk) + | |
315 | sizeof(struct btrfs_stripe) * (num_stripes - 1); | |
316 | } | |
317 | ||
5d4f98a2 YZ |
318 | #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) |
319 | #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) | |
acce952b | 320 | |
321 | /* | |
322 | * File system states | |
323 | */ | |
324 | ||
325 | /* Errors detected */ | |
326 | #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2) | |
327 | ||
5d4f98a2 YZ |
328 | #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32) |
329 | #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33) | |
330 | ||
331 | #define BTRFS_BACKREF_REV_MAX 256 | |
332 | #define BTRFS_BACKREF_REV_SHIFT 56 | |
333 | #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ | |
334 | BTRFS_BACKREF_REV_SHIFT) | |
335 | ||
336 | #define BTRFS_OLD_BACKREF_REV 0 | |
337 | #define BTRFS_MIXED_BACKREF_REV 1 | |
63b10fc4 | 338 | |
fec577fb CM |
339 | /* |
340 | * every tree block (leaf or node) starts with this header. | |
341 | */ | |
bb492bb0 | 342 | struct btrfs_header { |
e17cade2 | 343 | /* these first four must match the super block */ |
f254e52c | 344 | u8 csum[BTRFS_CSUM_SIZE]; |
5f39d397 | 345 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 346 | __le64 bytenr; /* which block this node is supposed to live in */ |
63b10fc4 | 347 | __le64 flags; |
e17cade2 CM |
348 | |
349 | /* allowed to be different from the super from here on down */ | |
350 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; | |
7f5c1516 | 351 | __le64 generation; |
4d775673 | 352 | __le64 owner; |
5f39d397 | 353 | __le32 nritems; |
9a6f11ed | 354 | u8 level; |
eb60ceac CM |
355 | } __attribute__ ((__packed__)); |
356 | ||
5f39d397 | 357 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
d397712b CM |
358 | sizeof(struct btrfs_header)) / \ |
359 | sizeof(struct btrfs_key_ptr)) | |
123abc88 | 360 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
5f39d397 | 361 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
236454df CM |
362 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
363 | sizeof(struct btrfs_item) - \ | |
364 | sizeof(struct btrfs_file_extent_item)) | |
f34f57a3 YZ |
365 | #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
366 | sizeof(struct btrfs_item) -\ | |
367 | sizeof(struct btrfs_dir_item)) | |
eb60ceac | 368 | |
0b86a832 CM |
369 | |
370 | /* | |
371 | * this is a very generous portion of the super block, giving us | |
372 | * room to translate 14 chunks with 3 stripes each. | |
373 | */ | |
374 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 | |
7ae9c09d | 375 | #define BTRFS_LABEL_SIZE 256 |
0b86a832 | 376 | |
af31f5e5 CM |
377 | /* |
378 | * just in case we somehow lose the roots and are not able to mount, | |
379 | * we store an array of the roots from previous transactions | |
380 | * in the super. | |
381 | */ | |
382 | #define BTRFS_NUM_BACKUP_ROOTS 4 | |
383 | struct btrfs_root_backup { | |
384 | __le64 tree_root; | |
385 | __le64 tree_root_gen; | |
386 | ||
387 | __le64 chunk_root; | |
388 | __le64 chunk_root_gen; | |
389 | ||
390 | __le64 extent_root; | |
391 | __le64 extent_root_gen; | |
392 | ||
393 | __le64 fs_root; | |
394 | __le64 fs_root_gen; | |
395 | ||
396 | __le64 dev_root; | |
397 | __le64 dev_root_gen; | |
398 | ||
399 | __le64 csum_root; | |
400 | __le64 csum_root_gen; | |
401 | ||
402 | __le64 total_bytes; | |
403 | __le64 bytes_used; | |
404 | __le64 num_devices; | |
405 | /* future */ | |
406 | __le64 unsed_64[4]; | |
407 | ||
408 | u8 tree_root_level; | |
409 | u8 chunk_root_level; | |
410 | u8 extent_root_level; | |
411 | u8 fs_root_level; | |
412 | u8 dev_root_level; | |
413 | u8 csum_root_level; | |
414 | /* future and to align */ | |
415 | u8 unused_8[10]; | |
416 | } __attribute__ ((__packed__)); | |
417 | ||
fec577fb CM |
418 | /* |
419 | * the super block basically lists the main trees of the FS | |
420 | * it currently lacks any block count etc etc | |
421 | */ | |
234b63a0 | 422 | struct btrfs_super_block { |
f254e52c | 423 | u8 csum[BTRFS_CSUM_SIZE]; |
63b10fc4 | 424 | /* the first 4 fields must match struct btrfs_header */ |
2b82032c | 425 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 426 | __le64 bytenr; /* this block number */ |
63b10fc4 | 427 | __le64 flags; |
e17cade2 CM |
428 | |
429 | /* allowed to be different from the btrfs_header from here own down */ | |
3768f368 | 430 | __le64 magic; |
3768f368 CM |
431 | __le64 generation; |
432 | __le64 root; | |
0b86a832 | 433 | __le64 chunk_root; |
e02119d5 | 434 | __le64 log_root; |
c3027eb5 CM |
435 | |
436 | /* this will help find the new super based on the log root */ | |
437 | __le64 log_root_transid; | |
db94535d CM |
438 | __le64 total_bytes; |
439 | __le64 bytes_used; | |
2e635a27 | 440 | __le64 root_dir_objectid; |
8a4b83cc | 441 | __le64 num_devices; |
5f39d397 CM |
442 | __le32 sectorsize; |
443 | __le32 nodesize; | |
444 | __le32 leafsize; | |
87ee04eb | 445 | __le32 stripesize; |
0b86a832 | 446 | __le32 sys_chunk_array_size; |
84234f3a | 447 | __le64 chunk_root_generation; |
f2b636e8 JB |
448 | __le64 compat_flags; |
449 | __le64 compat_ro_flags; | |
450 | __le64 incompat_flags; | |
607d432d | 451 | __le16 csum_type; |
db94535d | 452 | u8 root_level; |
0b86a832 | 453 | u8 chunk_root_level; |
e02119d5 | 454 | u8 log_root_level; |
0d81ba5d | 455 | struct btrfs_dev_item dev_item; |
c3027eb5 | 456 | |
7ae9c09d | 457 | char label[BTRFS_LABEL_SIZE]; |
c3027eb5 | 458 | |
0af3d00b JB |
459 | __le64 cache_generation; |
460 | ||
c3027eb5 | 461 | /* future expansion */ |
0af3d00b | 462 | __le64 reserved[31]; |
0b86a832 | 463 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
af31f5e5 | 464 | struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; |
cfaa7295 CM |
465 | } __attribute__ ((__packed__)); |
466 | ||
f2b636e8 JB |
467 | /* |
468 | * Compat flags that we support. If any incompat flags are set other than the | |
469 | * ones specified below then we will fail to mount | |
470 | */ | |
5d4f98a2 | 471 | #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) |
0af3d00b | 472 | #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1) |
67377734 | 473 | #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2) |
a6fa6fae | 474 | #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3) |
727011e0 CM |
475 | /* |
476 | * some patches floated around with a second compression method | |
477 | * lets save that incompat here for when they do get in | |
478 | * Note we don't actually support it, we're just reserving the | |
479 | * number | |
480 | */ | |
481 | #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4) | |
482 | ||
483 | /* | |
484 | * older kernels tried to do bigger metadata blocks, but the | |
485 | * code was pretty buggy. Lets not let them try anymore. | |
486 | */ | |
487 | #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5) | |
5d4f98a2 YZ |
488 | |
489 | #define BTRFS_FEATURE_COMPAT_SUPP 0ULL | |
490 | #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL | |
0af3d00b JB |
491 | #define BTRFS_FEATURE_INCOMPAT_SUPP \ |
492 | (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ | |
67377734 | 493 | BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ |
a6fa6fae | 494 | BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ |
727011e0 | 495 | BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ |
a6fa6fae | 496 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO) |
f2b636e8 | 497 | |
fec577fb | 498 | /* |
62e2749e | 499 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
500 | * the item in the leaf (relative to the start of the data area) |
501 | */ | |
0783fcfc | 502 | struct btrfs_item { |
e2fa7227 | 503 | struct btrfs_disk_key key; |
123abc88 | 504 | __le32 offset; |
5f39d397 | 505 | __le32 size; |
eb60ceac CM |
506 | } __attribute__ ((__packed__)); |
507 | ||
fec577fb CM |
508 | /* |
509 | * leaves have an item area and a data area: | |
510 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
511 | * | |
512 | * The data is separate from the items to get the keys closer together | |
513 | * during searches. | |
514 | */ | |
234b63a0 | 515 | struct btrfs_leaf { |
bb492bb0 | 516 | struct btrfs_header header; |
123abc88 | 517 | struct btrfs_item items[]; |
eb60ceac CM |
518 | } __attribute__ ((__packed__)); |
519 | ||
fec577fb CM |
520 | /* |
521 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
522 | * other blocks | |
523 | */ | |
123abc88 CM |
524 | struct btrfs_key_ptr { |
525 | struct btrfs_disk_key key; | |
526 | __le64 blockptr; | |
74493f7a | 527 | __le64 generation; |
123abc88 CM |
528 | } __attribute__ ((__packed__)); |
529 | ||
234b63a0 | 530 | struct btrfs_node { |
bb492bb0 | 531 | struct btrfs_header header; |
123abc88 | 532 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
533 | } __attribute__ ((__packed__)); |
534 | ||
fec577fb | 535 | /* |
234b63a0 CM |
536 | * btrfs_paths remember the path taken from the root down to the leaf. |
537 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
538 | * to any other levels that are present. |
539 | * | |
540 | * The slots array records the index of the item or block pointer | |
541 | * used while walking the tree. | |
542 | */ | |
234b63a0 | 543 | struct btrfs_path { |
5f39d397 | 544 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
234b63a0 | 545 | int slots[BTRFS_MAX_LEVEL]; |
925baedd CM |
546 | /* if there is real range locking, this locks field will change */ |
547 | int locks[BTRFS_MAX_LEVEL]; | |
3c69faec | 548 | int reada; |
925baedd | 549 | /* keep some upper locks as we walk down */ |
6702ed49 | 550 | int lowest_level; |
459931ec CM |
551 | |
552 | /* | |
553 | * set by btrfs_split_item, tells search_slot to keep all locks | |
554 | * and to force calls to keep space in the nodes | |
555 | */ | |
b9473439 CM |
556 | unsigned int search_for_split:1; |
557 | unsigned int keep_locks:1; | |
558 | unsigned int skip_locking:1; | |
559 | unsigned int leave_spinning:1; | |
5d4f98a2 | 560 | unsigned int search_commit_root:1; |
eb60ceac | 561 | }; |
5de08d7d | 562 | |
62e2749e CM |
563 | /* |
564 | * items in the extent btree are used to record the objectid of the | |
565 | * owner of the block and the number of references | |
566 | */ | |
5d4f98a2 | 567 | |
62e2749e | 568 | struct btrfs_extent_item { |
5d4f98a2 YZ |
569 | __le64 refs; |
570 | __le64 generation; | |
571 | __le64 flags; | |
572 | } __attribute__ ((__packed__)); | |
573 | ||
574 | struct btrfs_extent_item_v0 { | |
62e2749e | 575 | __le32 refs; |
74493f7a CM |
576 | } __attribute__ ((__packed__)); |
577 | ||
5d4f98a2 YZ |
578 | #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \ |
579 | sizeof(struct btrfs_item)) | |
580 | ||
581 | #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0) | |
582 | #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1) | |
583 | ||
584 | /* following flags only apply to tree blocks */ | |
585 | ||
586 | /* use full backrefs for extent pointers in the block */ | |
587 | #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8) | |
588 | ||
a2de733c AJ |
589 | /* |
590 | * this flag is only used internally by scrub and may be changed at any time | |
591 | * it is only declared here to avoid collisions | |
592 | */ | |
593 | #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48) | |
594 | ||
5d4f98a2 YZ |
595 | struct btrfs_tree_block_info { |
596 | struct btrfs_disk_key key; | |
597 | u8 level; | |
598 | } __attribute__ ((__packed__)); | |
599 | ||
600 | struct btrfs_extent_data_ref { | |
601 | __le64 root; | |
602 | __le64 objectid; | |
603 | __le64 offset; | |
604 | __le32 count; | |
605 | } __attribute__ ((__packed__)); | |
606 | ||
607 | struct btrfs_shared_data_ref { | |
608 | __le32 count; | |
609 | } __attribute__ ((__packed__)); | |
610 | ||
611 | struct btrfs_extent_inline_ref { | |
612 | u8 type; | |
1bec1aed | 613 | __le64 offset; |
5d4f98a2 YZ |
614 | } __attribute__ ((__packed__)); |
615 | ||
616 | /* old style backrefs item */ | |
617 | struct btrfs_extent_ref_v0 { | |
74493f7a CM |
618 | __le64 root; |
619 | __le64 generation; | |
620 | __le64 objectid; | |
5d4f98a2 | 621 | __le32 count; |
62e2749e CM |
622 | } __attribute__ ((__packed__)); |
623 | ||
5d4f98a2 | 624 | |
0b86a832 CM |
625 | /* dev extents record free space on individual devices. The owner |
626 | * field points back to the chunk allocation mapping tree that allocated | |
e17cade2 | 627 | * the extent. The chunk tree uuid field is a way to double check the owner |
0b86a832 CM |
628 | */ |
629 | struct btrfs_dev_extent { | |
e17cade2 CM |
630 | __le64 chunk_tree; |
631 | __le64 chunk_objectid; | |
632 | __le64 chunk_offset; | |
0b86a832 | 633 | __le64 length; |
e17cade2 | 634 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
635 | } __attribute__ ((__packed__)); |
636 | ||
3954401f | 637 | struct btrfs_inode_ref { |
aec7477b | 638 | __le64 index; |
3954401f CM |
639 | __le16 name_len; |
640 | /* name goes here */ | |
641 | } __attribute__ ((__packed__)); | |
642 | ||
0b86a832 | 643 | struct btrfs_timespec { |
f254e52c | 644 | __le64 sec; |
1e1d2701 CM |
645 | __le32 nsec; |
646 | } __attribute__ ((__packed__)); | |
647 | ||
95029d7d | 648 | enum btrfs_compression_type { |
261507a0 LZ |
649 | BTRFS_COMPRESS_NONE = 0, |
650 | BTRFS_COMPRESS_ZLIB = 1, | |
a6fa6fae LZ |
651 | BTRFS_COMPRESS_LZO = 2, |
652 | BTRFS_COMPRESS_TYPES = 2, | |
653 | BTRFS_COMPRESS_LAST = 3, | |
95029d7d | 654 | }; |
c8b97818 | 655 | |
1e1d2701 | 656 | struct btrfs_inode_item { |
e02119d5 | 657 | /* nfs style generation number */ |
1e1d2701 | 658 | __le64 generation; |
e02119d5 CM |
659 | /* transid that last touched this inode */ |
660 | __le64 transid; | |
1e1d2701 | 661 | __le64 size; |
a76a3cd4 | 662 | __le64 nbytes; |
31f3c99b | 663 | __le64 block_group; |
1e1d2701 CM |
664 | __le32 nlink; |
665 | __le32 uid; | |
666 | __le32 gid; | |
667 | __le32 mode; | |
0b86a832 | 668 | __le64 rdev; |
f2b636e8 | 669 | __le64 flags; |
c8b97818 | 670 | |
c3027eb5 CM |
671 | /* modification sequence number for NFS */ |
672 | __le64 sequence; | |
673 | ||
674 | /* | |
675 | * a little future expansion, for more than this we can | |
676 | * just grow the inode item and version it | |
677 | */ | |
678 | __le64 reserved[4]; | |
0b86a832 CM |
679 | struct btrfs_timespec atime; |
680 | struct btrfs_timespec ctime; | |
681 | struct btrfs_timespec mtime; | |
682 | struct btrfs_timespec otime; | |
1e1d2701 CM |
683 | } __attribute__ ((__packed__)); |
684 | ||
e02119d5 CM |
685 | struct btrfs_dir_log_item { |
686 | __le64 end; | |
687 | } __attribute__ ((__packed__)); | |
688 | ||
62e2749e | 689 | struct btrfs_dir_item { |
d6e4a428 | 690 | struct btrfs_disk_key location; |
e02119d5 | 691 | __le64 transid; |
5103e947 | 692 | __le16 data_len; |
a8a2ee0c | 693 | __le16 name_len; |
62e2749e CM |
694 | u8 type; |
695 | } __attribute__ ((__packed__)); | |
696 | ||
b83cc969 LZ |
697 | #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0) |
698 | ||
62e2749e | 699 | struct btrfs_root_item { |
d6e4a428 | 700 | struct btrfs_inode_item inode; |
84234f3a | 701 | __le64 generation; |
d6e4a428 | 702 | __le64 root_dirid; |
db94535d CM |
703 | __le64 bytenr; |
704 | __le64 byte_limit; | |
705 | __le64 bytes_used; | |
80ff3856 | 706 | __le64 last_snapshot; |
f2b636e8 | 707 | __le64 flags; |
62e2749e | 708 | __le32 refs; |
5eda7b5e CM |
709 | struct btrfs_disk_key drop_progress; |
710 | u8 drop_level; | |
db94535d | 711 | u8 level; |
9f5fae2f | 712 | } __attribute__ ((__packed__)); |
62e2749e | 713 | |
0660b5af CM |
714 | /* |
715 | * this is used for both forward and backward root refs | |
716 | */ | |
717 | struct btrfs_root_ref { | |
718 | __le64 dirid; | |
719 | __le64 sequence; | |
720 | __le16 name_len; | |
721 | } __attribute__ ((__packed__)); | |
722 | ||
0940ebf6 ID |
723 | struct btrfs_disk_balance_args { |
724 | /* | |
725 | * profiles to operate on, single is denoted by | |
726 | * BTRFS_AVAIL_ALLOC_BIT_SINGLE | |
727 | */ | |
728 | __le64 profiles; | |
729 | ||
730 | /* usage filter */ | |
731 | __le64 usage; | |
732 | ||
733 | /* devid filter */ | |
734 | __le64 devid; | |
735 | ||
736 | /* devid subset filter [pstart..pend) */ | |
737 | __le64 pstart; | |
738 | __le64 pend; | |
739 | ||
740 | /* btrfs virtual address space subset filter [vstart..vend) */ | |
741 | __le64 vstart; | |
742 | __le64 vend; | |
743 | ||
744 | /* | |
745 | * profile to convert to, single is denoted by | |
746 | * BTRFS_AVAIL_ALLOC_BIT_SINGLE | |
747 | */ | |
748 | __le64 target; | |
749 | ||
750 | /* BTRFS_BALANCE_ARGS_* */ | |
751 | __le64 flags; | |
752 | ||
753 | __le64 unused[8]; | |
754 | } __attribute__ ((__packed__)); | |
755 | ||
756 | /* | |
757 | * store balance parameters to disk so that balance can be properly | |
758 | * resumed after crash or unmount | |
759 | */ | |
760 | struct btrfs_balance_item { | |
761 | /* BTRFS_BALANCE_* */ | |
762 | __le64 flags; | |
763 | ||
764 | struct btrfs_disk_balance_args data; | |
765 | struct btrfs_disk_balance_args meta; | |
766 | struct btrfs_disk_balance_args sys; | |
767 | ||
768 | __le64 unused[4]; | |
769 | } __attribute__ ((__packed__)); | |
770 | ||
d899e052 YZ |
771 | #define BTRFS_FILE_EXTENT_INLINE 0 |
772 | #define BTRFS_FILE_EXTENT_REG 1 | |
773 | #define BTRFS_FILE_EXTENT_PREALLOC 2 | |
236454df | 774 | |
9f5fae2f | 775 | struct btrfs_file_extent_item { |
c8b97818 CM |
776 | /* |
777 | * transaction id that created this extent | |
778 | */ | |
71951f35 | 779 | __le64 generation; |
c8b97818 CM |
780 | /* |
781 | * max number of bytes to hold this extent in ram | |
782 | * when we split a compressed extent we can't know how big | |
783 | * each of the resulting pieces will be. So, this is | |
784 | * an upper limit on the size of the extent in ram instead of | |
785 | * an exact limit. | |
786 | */ | |
787 | __le64 ram_bytes; | |
788 | ||
789 | /* | |
790 | * 32 bits for the various ways we might encode the data, | |
791 | * including compression and encryption. If any of these | |
792 | * are set to something a given disk format doesn't understand | |
793 | * it is treated like an incompat flag for reading and writing, | |
794 | * but not for stat. | |
795 | */ | |
796 | u8 compression; | |
797 | u8 encryption; | |
798 | __le16 other_encoding; /* spare for later use */ | |
799 | ||
800 | /* are we inline data or a real extent? */ | |
236454df | 801 | u8 type; |
c8b97818 | 802 | |
9f5fae2f CM |
803 | /* |
804 | * disk space consumed by the extent, checksum blocks are included | |
805 | * in these numbers | |
806 | */ | |
db94535d CM |
807 | __le64 disk_bytenr; |
808 | __le64 disk_num_bytes; | |
9f5fae2f | 809 | /* |
dee26a9f | 810 | * the logical offset in file blocks (no csums) |
9f5fae2f CM |
811 | * this extent record is for. This allows a file extent to point |
812 | * into the middle of an existing extent on disk, sharing it | |
813 | * between two snapshots (useful if some bytes in the middle of the | |
814 | * extent have changed | |
815 | */ | |
816 | __le64 offset; | |
817 | /* | |
c8b97818 CM |
818 | * the logical number of file blocks (no csums included). This |
819 | * always reflects the size uncompressed and without encoding. | |
9f5fae2f | 820 | */ |
db94535d | 821 | __le64 num_bytes; |
c8b97818 | 822 | |
9f5fae2f CM |
823 | } __attribute__ ((__packed__)); |
824 | ||
f254e52c | 825 | struct btrfs_csum_item { |
509659cd | 826 | u8 csum; |
f254e52c CM |
827 | } __attribute__ ((__packed__)); |
828 | ||
733f4fbb SB |
829 | struct btrfs_dev_stats_item { |
830 | /* | |
831 | * grow this item struct at the end for future enhancements and keep | |
832 | * the existing values unchanged | |
833 | */ | |
834 | __le64 values[BTRFS_DEV_STAT_VALUES_MAX]; | |
835 | } __attribute__ ((__packed__)); | |
836 | ||
0b86a832 | 837 | /* different types of block groups (and chunks) */ |
52ba6929 ID |
838 | #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0) |
839 | #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1) | |
840 | #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2) | |
841 | #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3) | |
842 | #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4) | |
843 | #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5) | |
844 | #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6) | |
a46d11a8 | 845 | #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE |
52ba6929 ID |
846 | #define BTRFS_NR_RAID_TYPES 5 |
847 | ||
848 | #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \ | |
849 | BTRFS_BLOCK_GROUP_SYSTEM | \ | |
850 | BTRFS_BLOCK_GROUP_METADATA) | |
851 | ||
852 | #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \ | |
853 | BTRFS_BLOCK_GROUP_RAID1 | \ | |
854 | BTRFS_BLOCK_GROUP_DUP | \ | |
855 | BTRFS_BLOCK_GROUP_RAID10) | |
a46d11a8 ID |
856 | /* |
857 | * We need a bit for restriper to be able to tell when chunks of type | |
858 | * SINGLE are available. This "extended" profile format is used in | |
859 | * fs_info->avail_*_alloc_bits (in-memory) and balance item fields | |
860 | * (on-disk). The corresponding on-disk bit in chunk.type is reserved | |
861 | * to avoid remappings between two formats in future. | |
862 | */ | |
863 | #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48) | |
864 | ||
899c81ea ID |
865 | #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \ |
866 | BTRFS_AVAIL_ALLOC_BIT_SINGLE) | |
867 | ||
868 | static inline u64 chunk_to_extended(u64 flags) | |
869 | { | |
870 | if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0) | |
871 | flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE; | |
872 | ||
873 | return flags; | |
874 | } | |
875 | static inline u64 extended_to_chunk(u64 flags) | |
876 | { | |
877 | return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE; | |
878 | } | |
879 | ||
9078a3e1 CM |
880 | struct btrfs_block_group_item { |
881 | __le64 used; | |
0b86a832 CM |
882 | __le64 chunk_objectid; |
883 | __le64 flags; | |
9078a3e1 CM |
884 | } __attribute__ ((__packed__)); |
885 | ||
6324fbf3 CM |
886 | struct btrfs_space_info { |
887 | u64 flags; | |
6a63209f | 888 | |
89a55897 JB |
889 | u64 total_bytes; /* total bytes in the space, |
890 | this doesn't take mirrors into account */ | |
b742bb82 | 891 | u64 bytes_used; /* total bytes used, |
e9c54999 | 892 | this doesn't take mirrors into account */ |
6a63209f JB |
893 | u64 bytes_pinned; /* total bytes pinned, will be freed when the |
894 | transaction finishes */ | |
895 | u64 bytes_reserved; /* total bytes the allocator has reserved for | |
896 | current allocations */ | |
897 | u64 bytes_readonly; /* total bytes that are read only */ | |
8929ecfa | 898 | |
6a63209f | 899 | u64 bytes_may_use; /* number of bytes that may be used for |
9ed74f2d | 900 | delalloc/allocations */ |
b742bb82 | 901 | u64 disk_used; /* total bytes used on disk */ |
89a55897 JB |
902 | u64 disk_total; /* total bytes on disk, takes mirrors into |
903 | account */ | |
6a63209f | 904 | |
36e39c40 CM |
905 | /* |
906 | * we bump reservation progress every time we decrement | |
907 | * bytes_reserved. This way people waiting for reservations | |
908 | * know something good has happened and they can check | |
909 | * for progress. The number here isn't to be trusted, it | |
910 | * just shows reclaim activity | |
911 | */ | |
912 | unsigned long reservation_progress; | |
913 | ||
4ea02885 | 914 | unsigned int full:1; /* indicates that we cannot allocate any more |
6a63209f | 915 | chunks for this space */ |
4ea02885 | 916 | unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ |
6d74119f | 917 | |
fdb5effd JB |
918 | unsigned int flush:1; /* set if we are trying to make space */ |
919 | ||
4ea02885 DS |
920 | unsigned int force_alloc; /* set if we need to force a chunk |
921 | alloc for this space */ | |
6a63209f | 922 | |
6324fbf3 | 923 | struct list_head list; |
0f9dd46c JB |
924 | |
925 | /* for block groups in our same type */ | |
b742bb82 | 926 | struct list_head block_groups[BTRFS_NR_RAID_TYPES]; |
0f9dd46c | 927 | spinlock_t lock; |
80eb234a | 928 | struct rw_semaphore groups_sem; |
fdb5effd | 929 | wait_queue_head_t wait; |
0f9dd46c JB |
930 | }; |
931 | ||
f0486c68 YZ |
932 | struct btrfs_block_rsv { |
933 | u64 size; | |
934 | u64 reserved; | |
f0486c68 | 935 | struct btrfs_space_info *space_info; |
f0486c68 | 936 | spinlock_t lock; |
c08782da | 937 | unsigned int full; |
f0486c68 YZ |
938 | }; |
939 | ||
fa9c0d79 CM |
940 | /* |
941 | * free clusters are used to claim free space in relatively large chunks, | |
942 | * allowing us to do less seeky writes. They are used for all metadata | |
943 | * allocations and data allocations in ssd mode. | |
944 | */ | |
945 | struct btrfs_free_cluster { | |
946 | spinlock_t lock; | |
947 | spinlock_t refill_lock; | |
948 | struct rb_root root; | |
949 | ||
950 | /* largest extent in this cluster */ | |
951 | u64 max_size; | |
952 | ||
953 | /* first extent starting offset */ | |
954 | u64 window_start; | |
955 | ||
956 | struct btrfs_block_group_cache *block_group; | |
957 | /* | |
958 | * when a cluster is allocated from a block group, we put the | |
959 | * cluster onto a list in the block group so that it can | |
960 | * be freed before the block group is freed. | |
961 | */ | |
962 | struct list_head block_group_list; | |
6324fbf3 CM |
963 | }; |
964 | ||
817d52f8 JB |
965 | enum btrfs_caching_type { |
966 | BTRFS_CACHE_NO = 0, | |
967 | BTRFS_CACHE_STARTED = 1, | |
291c7d2f JB |
968 | BTRFS_CACHE_FAST = 2, |
969 | BTRFS_CACHE_FINISHED = 3, | |
817d52f8 JB |
970 | }; |
971 | ||
0af3d00b JB |
972 | enum btrfs_disk_cache_state { |
973 | BTRFS_DC_WRITTEN = 0, | |
974 | BTRFS_DC_ERROR = 1, | |
975 | BTRFS_DC_CLEAR = 2, | |
976 | BTRFS_DC_SETUP = 3, | |
977 | BTRFS_DC_NEED_WRITE = 4, | |
978 | }; | |
979 | ||
11833d66 YZ |
980 | struct btrfs_caching_control { |
981 | struct list_head list; | |
982 | struct mutex mutex; | |
983 | wait_queue_head_t wait; | |
bab39bf9 | 984 | struct btrfs_work work; |
11833d66 YZ |
985 | struct btrfs_block_group_cache *block_group; |
986 | u64 progress; | |
987 | atomic_t count; | |
988 | }; | |
989 | ||
9078a3e1 CM |
990 | struct btrfs_block_group_cache { |
991 | struct btrfs_key key; | |
992 | struct btrfs_block_group_item item; | |
817d52f8 | 993 | struct btrfs_fs_info *fs_info; |
0af3d00b | 994 | struct inode *inode; |
c286ac48 | 995 | spinlock_t lock; |
324ae4df | 996 | u64 pinned; |
e8569813 | 997 | u64 reserved; |
1b2da372 | 998 | u64 bytes_super; |
0b86a832 | 999 | u64 flags; |
96303081 | 1000 | u64 sectorsize; |
5b0e95bf | 1001 | u64 cache_generation; |
0410c94a MK |
1002 | unsigned int ro:1; |
1003 | unsigned int dirty:1; | |
1004 | unsigned int iref:1; | |
0af3d00b JB |
1005 | |
1006 | int disk_cache_state; | |
0f9dd46c | 1007 | |
817d52f8 | 1008 | /* cache tracking stuff */ |
817d52f8 | 1009 | int cached; |
11833d66 YZ |
1010 | struct btrfs_caching_control *caching_ctl; |
1011 | u64 last_byte_to_unpin; | |
817d52f8 | 1012 | |
0f9dd46c JB |
1013 | struct btrfs_space_info *space_info; |
1014 | ||
1015 | /* free space cache stuff */ | |
34d52cb6 | 1016 | struct btrfs_free_space_ctl *free_space_ctl; |
0f9dd46c JB |
1017 | |
1018 | /* block group cache stuff */ | |
1019 | struct rb_node cache_node; | |
1020 | ||
1021 | /* for block groups in the same raid type */ | |
1022 | struct list_head list; | |
d2fb3437 YZ |
1023 | |
1024 | /* usage count */ | |
1025 | atomic_t count; | |
fa9c0d79 CM |
1026 | |
1027 | /* List of struct btrfs_free_clusters for this block group. | |
1028 | * Today it will only have one thing on it, but that may change | |
1029 | */ | |
1030 | struct list_head cluster_list; | |
9078a3e1 | 1031 | }; |
0b86a832 | 1032 | |
5d4f98a2 | 1033 | struct reloc_control; |
0b86a832 | 1034 | struct btrfs_device; |
8a4b83cc | 1035 | struct btrfs_fs_devices; |
c9e9f97b | 1036 | struct btrfs_balance_control; |
16cdcec7 | 1037 | struct btrfs_delayed_root; |
9f5fae2f | 1038 | struct btrfs_fs_info { |
5f39d397 | 1039 | u8 fsid[BTRFS_FSID_SIZE]; |
e17cade2 | 1040 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
62e2749e CM |
1041 | struct btrfs_root *extent_root; |
1042 | struct btrfs_root *tree_root; | |
0b86a832 CM |
1043 | struct btrfs_root *chunk_root; |
1044 | struct btrfs_root *dev_root; | |
3de4586c | 1045 | struct btrfs_root *fs_root; |
d20f7043 | 1046 | struct btrfs_root *csum_root; |
e02119d5 CM |
1047 | |
1048 | /* the log root tree is a directory of all the other log roots */ | |
1049 | struct btrfs_root *log_root_tree; | |
4df27c4d YZ |
1050 | |
1051 | spinlock_t fs_roots_radix_lock; | |
0f7d52f4 | 1052 | struct radix_tree_root fs_roots_radix; |
1a5bc167 | 1053 | |
0f9dd46c JB |
1054 | /* block group cache stuff */ |
1055 | spinlock_t block_group_cache_lock; | |
1056 | struct rb_root block_group_cache_tree; | |
1057 | ||
2bf64758 JB |
1058 | /* keep track of unallocated space */ |
1059 | spinlock_t free_chunk_lock; | |
1060 | u64 free_chunk_space; | |
1061 | ||
11833d66 YZ |
1062 | struct extent_io_tree freed_extents[2]; |
1063 | struct extent_io_tree *pinned_extents; | |
1a5bc167 | 1064 | |
0b86a832 CM |
1065 | /* logical->physical extent mapping */ |
1066 | struct btrfs_mapping_tree mapping_tree; | |
1067 | ||
16cdcec7 MX |
1068 | /* |
1069 | * block reservation for extent, checksum, root tree and | |
1070 | * delayed dir index item | |
1071 | */ | |
f0486c68 YZ |
1072 | struct btrfs_block_rsv global_block_rsv; |
1073 | /* block reservation for delay allocation */ | |
1074 | struct btrfs_block_rsv delalloc_block_rsv; | |
1075 | /* block reservation for metadata operations */ | |
1076 | struct btrfs_block_rsv trans_block_rsv; | |
1077 | /* block reservation for chunk tree */ | |
1078 | struct btrfs_block_rsv chunk_block_rsv; | |
6d668dda JB |
1079 | /* block reservation for delayed operations */ |
1080 | struct btrfs_block_rsv delayed_block_rsv; | |
f0486c68 YZ |
1081 | |
1082 | struct btrfs_block_rsv empty_block_rsv; | |
1083 | ||
293ffd5f | 1084 | u64 generation; |
15ee9bc7 | 1085 | u64 last_trans_committed; |
12fcfd22 CM |
1086 | |
1087 | /* | |
1088 | * this is updated to the current trans every time a full commit | |
1089 | * is required instead of the faster short fsync log commits | |
1090 | */ | |
1091 | u64 last_trans_log_full_commit; | |
25cd999e | 1092 | unsigned long mount_opt; |
261507a0 | 1093 | unsigned long compress_type:4; |
6f568d35 | 1094 | u64 max_inline; |
8f662a76 | 1095 | u64 alloc_start; |
79154b1b | 1096 | struct btrfs_transaction *running_transaction; |
e6dcd2dc | 1097 | wait_queue_head_t transaction_throttle; |
f9295749 | 1098 | wait_queue_head_t transaction_wait; |
bb9c12c9 | 1099 | wait_queue_head_t transaction_blocked_wait; |
771ed689 | 1100 | wait_queue_head_t async_submit_wait; |
e02119d5 | 1101 | |
6c41761f DS |
1102 | struct btrfs_super_block *super_copy; |
1103 | struct btrfs_super_block *super_for_commit; | |
0b86a832 | 1104 | struct block_device *__bdev; |
e20d96d6 | 1105 | struct super_block *sb; |
d98237b3 | 1106 | struct inode *btree_inode; |
04160088 | 1107 | struct backing_dev_info bdi; |
e02119d5 | 1108 | struct mutex tree_log_mutex; |
a74a4b97 CM |
1109 | struct mutex transaction_kthread_mutex; |
1110 | struct mutex cleaner_mutex; | |
925baedd | 1111 | struct mutex chunk_mutex; |
7d9eb12c | 1112 | struct mutex volume_mutex; |
5a3f23d5 CM |
1113 | /* |
1114 | * this protects the ordered operations list only while we are | |
1115 | * processing all of the entries on it. This way we make | |
1116 | * sure the commit code doesn't find the list temporarily empty | |
1117 | * because another function happens to be doing non-waiting preflush | |
1118 | * before jumping into the main commit. | |
1119 | */ | |
1120 | struct mutex ordered_operations_mutex; | |
11833d66 | 1121 | struct rw_semaphore extent_commit_sem; |
5a3f23d5 | 1122 | |
c71bf099 | 1123 | struct rw_semaphore cleanup_work_sem; |
76dda93c | 1124 | |
c71bf099 | 1125 | struct rw_semaphore subvol_sem; |
76dda93c YZ |
1126 | struct srcu_struct subvol_srcu; |
1127 | ||
a4abeea4 | 1128 | spinlock_t trans_lock; |
7585717f CM |
1129 | /* |
1130 | * the reloc mutex goes with the trans lock, it is taken | |
1131 | * during commit to protect us from the relocation code | |
1132 | */ | |
1133 | struct mutex reloc_mutex; | |
1134 | ||
8fd17795 | 1135 | struct list_head trans_list; |
19c00ddc | 1136 | struct list_head hashers; |
facda1e7 | 1137 | struct list_head dead_roots; |
11833d66 | 1138 | struct list_head caching_block_groups; |
e02119d5 | 1139 | |
24bbcf04 YZ |
1140 | spinlock_t delayed_iput_lock; |
1141 | struct list_head delayed_iputs; | |
1142 | ||
f29021b2 JS |
1143 | /* this protects tree_mod_seq_list */ |
1144 | spinlock_t tree_mod_seq_lock; | |
1145 | atomic_t tree_mod_seq; | |
1146 | struct list_head tree_mod_seq_list; | |
1147 | ||
1148 | /* this protects tree_mod_log */ | |
1149 | rwlock_t tree_mod_log_lock; | |
1150 | struct rb_root tree_mod_log; | |
1151 | ||
cb03c743 | 1152 | atomic_t nr_async_submits; |
8c8bee1d | 1153 | atomic_t async_submit_draining; |
0986fe9e | 1154 | atomic_t nr_async_bios; |
771ed689 | 1155 | atomic_t async_delalloc_pages; |
a4abeea4 | 1156 | atomic_t open_ioctl_trans; |
ce9adaa5 | 1157 | |
3eaa2885 CM |
1158 | /* |
1159 | * this is used by the balancing code to wait for all the pending | |
1160 | * ordered extents | |
1161 | */ | |
1162 | spinlock_t ordered_extent_lock; | |
5a3f23d5 CM |
1163 | |
1164 | /* | |
1165 | * all of the data=ordered extents pending writeback | |
1166 | * these can span multiple transactions and basically include | |
1167 | * every dirty data page that isn't from nodatacow | |
1168 | */ | |
3eaa2885 | 1169 | struct list_head ordered_extents; |
5a3f23d5 CM |
1170 | |
1171 | /* | |
1172 | * all of the inodes that have delalloc bytes. It is possible for | |
1173 | * this list to be empty even when there is still dirty data=ordered | |
1174 | * extents waiting to finish IO. | |
1175 | */ | |
ea8c2819 | 1176 | struct list_head delalloc_inodes; |
3eaa2885 | 1177 | |
5a3f23d5 CM |
1178 | /* |
1179 | * special rename and truncate targets that must be on disk before | |
1180 | * we're allowed to commit. This is basically the ext3 style | |
1181 | * data=ordered list. | |
1182 | */ | |
1183 | struct list_head ordered_operations; | |
1184 | ||
8b712842 CM |
1185 | /* |
1186 | * there is a pool of worker threads for checksumming during writes | |
1187 | * and a pool for checksumming after reads. This is because readers | |
1188 | * can run with FS locks held, and the writers may be waiting for | |
1189 | * those locks. We don't want ordering in the pending list to cause | |
1190 | * deadlocks, and so the two are serviced separately. | |
1cc127b5 CM |
1191 | * |
1192 | * A third pool does submit_bio to avoid deadlocking with the other | |
1193 | * two | |
8b712842 | 1194 | */ |
61d92c32 | 1195 | struct btrfs_workers generic_worker; |
8b712842 | 1196 | struct btrfs_workers workers; |
771ed689 | 1197 | struct btrfs_workers delalloc_workers; |
8b712842 | 1198 | struct btrfs_workers endio_workers; |
d20f7043 | 1199 | struct btrfs_workers endio_meta_workers; |
cad321ad | 1200 | struct btrfs_workers endio_meta_write_workers; |
e6dcd2dc | 1201 | struct btrfs_workers endio_write_workers; |
0cb59c99 | 1202 | struct btrfs_workers endio_freespace_worker; |
1cc127b5 | 1203 | struct btrfs_workers submit_workers; |
bab39bf9 | 1204 | struct btrfs_workers caching_workers; |
90519d66 | 1205 | struct btrfs_workers readahead_workers; |
bab39bf9 | 1206 | |
247e743c CM |
1207 | /* |
1208 | * fixup workers take dirty pages that didn't properly go through | |
1209 | * the cow mechanism and make them safe to write. It happens | |
1210 | * for the sys_munmap function call path | |
1211 | */ | |
1212 | struct btrfs_workers fixup_workers; | |
16cdcec7 | 1213 | struct btrfs_workers delayed_workers; |
a74a4b97 CM |
1214 | struct task_struct *transaction_kthread; |
1215 | struct task_struct *cleaner_kthread; | |
4543df7e | 1216 | int thread_pool_size; |
8b712842 | 1217 | |
58176a96 JB |
1218 | struct kobject super_kobj; |
1219 | struct completion kobj_unregister; | |
e66f709b | 1220 | int do_barriers; |
facda1e7 | 1221 | int closing; |
e02119d5 | 1222 | int log_root_recovering; |
a22285a6 | 1223 | int enospc_unlink; |
a4abeea4 | 1224 | int trans_no_join; |
9f5fae2f | 1225 | |
324ae4df | 1226 | u64 total_pinned; |
b9473439 CM |
1227 | |
1228 | /* protected by the delalloc lock, used to keep from writing | |
1229 | * metadata until there is a nice batch | |
1230 | */ | |
1231 | u64 dirty_metadata_bytes; | |
0b86a832 CM |
1232 | struct list_head dirty_cowonly_roots; |
1233 | ||
8a4b83cc | 1234 | struct btrfs_fs_devices *fs_devices; |
4184ea7f CM |
1235 | |
1236 | /* | |
1237 | * the space_info list is almost entirely read only. It only changes | |
1238 | * when we add a new raid type to the FS, and that happens | |
1239 | * very rarely. RCU is used to protect it. | |
1240 | */ | |
6324fbf3 | 1241 | struct list_head space_info; |
4184ea7f | 1242 | |
b4d7c3c9 LZ |
1243 | struct btrfs_space_info *data_sinfo; |
1244 | ||
5d4f98a2 YZ |
1245 | struct reloc_control *reloc_ctl; |
1246 | ||
1832a6d5 CM |
1247 | spinlock_t delalloc_lock; |
1248 | u64 delalloc_bytes; | |
fa9c0d79 CM |
1249 | |
1250 | /* data_alloc_cluster is only used in ssd mode */ | |
1251 | struct btrfs_free_cluster data_alloc_cluster; | |
1252 | ||
1253 | /* all metadata allocations go through this cluster */ | |
1254 | struct btrfs_free_cluster meta_alloc_cluster; | |
d18a2c44 | 1255 | |
4cb5300b CM |
1256 | /* auto defrag inodes go here */ |
1257 | spinlock_t defrag_inodes_lock; | |
1258 | struct rb_root defrag_inodes; | |
1259 | atomic_t defrag_running; | |
1260 | ||
31153d81 YZ |
1261 | spinlock_t ref_cache_lock; |
1262 | u64 total_ref_cache_size; | |
31153d81 | 1263 | |
a46d11a8 ID |
1264 | /* |
1265 | * these three are in extended format (availability of single | |
1266 | * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other | |
1267 | * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) | |
1268 | */ | |
d18a2c44 CM |
1269 | u64 avail_data_alloc_bits; |
1270 | u64 avail_metadata_alloc_bits; | |
1271 | u64 avail_system_alloc_bits; | |
788f20eb | 1272 | |
c9e9f97b ID |
1273 | /* restriper state */ |
1274 | spinlock_t balance_lock; | |
1275 | struct mutex balance_mutex; | |
837d5b6e ID |
1276 | atomic_t balance_running; |
1277 | atomic_t balance_pause_req; | |
a7e99c69 | 1278 | atomic_t balance_cancel_req; |
c9e9f97b | 1279 | struct btrfs_balance_control *balance_ctl; |
837d5b6e | 1280 | wait_queue_head_t balance_wait_q; |
c9e9f97b | 1281 | |
97e728d4 JB |
1282 | unsigned data_chunk_allocations; |
1283 | unsigned metadata_ratio; | |
1284 | ||
788f20eb | 1285 | void *bdev_holder; |
acce952b | 1286 | |
a2de733c AJ |
1287 | /* private scrub information */ |
1288 | struct mutex scrub_lock; | |
1289 | atomic_t scrubs_running; | |
1290 | atomic_t scrub_pause_req; | |
1291 | atomic_t scrubs_paused; | |
1292 | atomic_t scrub_cancel_req; | |
1293 | wait_queue_head_t scrub_pause_wait; | |
1294 | struct rw_semaphore scrub_super_lock; | |
1295 | int scrub_workers_refcnt; | |
1296 | struct btrfs_workers scrub_workers; | |
1297 | ||
21adbd5c SB |
1298 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
1299 | u32 check_integrity_print_mask; | |
1300 | #endif | |
1301 | ||
acce952b | 1302 | /* filesystem state */ |
1303 | u64 fs_state; | |
16cdcec7 MX |
1304 | |
1305 | struct btrfs_delayed_root *delayed_root; | |
af31f5e5 | 1306 | |
90519d66 AJ |
1307 | /* readahead tree */ |
1308 | spinlock_t reada_lock; | |
1309 | struct radix_tree_root reada_tree; | |
531f4b1a | 1310 | |
af31f5e5 CM |
1311 | /* next backup root to be overwritten */ |
1312 | int backup_root_index; | |
324ae4df | 1313 | }; |
0b86a832 | 1314 | |
9f5fae2f CM |
1315 | /* |
1316 | * in ram representation of the tree. extent_root is used for all allocations | |
f2458e1d | 1317 | * and for the extent tree extent_root root. |
9f5fae2f CM |
1318 | */ |
1319 | struct btrfs_root { | |
5f39d397 | 1320 | struct extent_buffer *node; |
925baedd | 1321 | |
5f39d397 | 1322 | struct extent_buffer *commit_root; |
e02119d5 | 1323 | struct btrfs_root *log_root; |
1a40e23b | 1324 | struct btrfs_root *reloc_root; |
31153d81 | 1325 | |
62e2749e CM |
1326 | struct btrfs_root_item root_item; |
1327 | struct btrfs_key root_key; | |
9f5fae2f | 1328 | struct btrfs_fs_info *fs_info; |
d0c803c4 CM |
1329 | struct extent_io_tree dirty_log_pages; |
1330 | ||
58176a96 JB |
1331 | struct kobject root_kobj; |
1332 | struct completion kobj_unregister; | |
a2135011 | 1333 | struct mutex objectid_mutex; |
7237f183 | 1334 | |
f0486c68 YZ |
1335 | spinlock_t accounting_lock; |
1336 | struct btrfs_block_rsv *block_rsv; | |
1337 | ||
581bb050 LZ |
1338 | /* free ino cache stuff */ |
1339 | struct mutex fs_commit_mutex; | |
1340 | struct btrfs_free_space_ctl *free_ino_ctl; | |
1341 | enum btrfs_caching_type cached; | |
1342 | spinlock_t cache_lock; | |
1343 | wait_queue_head_t cache_wait; | |
1344 | struct btrfs_free_space_ctl *free_ino_pinned; | |
1345 | u64 cache_progress; | |
82d5902d | 1346 | struct inode *cache_inode; |
581bb050 | 1347 | |
e02119d5 | 1348 | struct mutex log_mutex; |
7237f183 YZ |
1349 | wait_queue_head_t log_writer_wait; |
1350 | wait_queue_head_t log_commit_wait[2]; | |
1351 | atomic_t log_writers; | |
1352 | atomic_t log_commit[2]; | |
1353 | unsigned long log_transid; | |
257c62e1 | 1354 | unsigned long last_log_commit; |
7237f183 | 1355 | unsigned long log_batch; |
ff782e0a JB |
1356 | pid_t log_start_pid; |
1357 | bool log_multiple_pids; | |
ea8c2819 | 1358 | |
0f7d52f4 CM |
1359 | u64 objectid; |
1360 | u64 last_trans; | |
5f39d397 CM |
1361 | |
1362 | /* data allocations are done in sectorsize units */ | |
1363 | u32 sectorsize; | |
1364 | ||
1365 | /* node allocations are done in nodesize units */ | |
1366 | u32 nodesize; | |
1367 | ||
1368 | /* leaf allocations are done in leafsize units */ | |
1369 | u32 leafsize; | |
1370 | ||
87ee04eb CM |
1371 | u32 stripesize; |
1372 | ||
9f5fae2f | 1373 | u32 type; |
13a8a7c8 YZ |
1374 | |
1375 | u64 highest_objectid; | |
7585717f CM |
1376 | |
1377 | /* btrfs_record_root_in_trans is a multi-step process, | |
1378 | * and it can race with the balancing code. But the | |
1379 | * race is very small, and only the first time the root | |
1380 | * is added to each transaction. So in_trans_setup | |
1381 | * is used to tell us when more checks are required | |
1382 | */ | |
1383 | unsigned long in_trans_setup; | |
9f3a7427 | 1384 | int ref_cows; |
0b86a832 | 1385 | int track_dirty; |
4df27c4d YZ |
1386 | int in_radix; |
1387 | ||
3f157a2f | 1388 | u64 defrag_trans_start; |
6702ed49 | 1389 | struct btrfs_key defrag_progress; |
0ef3e66b | 1390 | struct btrfs_key defrag_max; |
6702ed49 | 1391 | int defrag_running; |
58176a96 | 1392 | char *name; |
0b86a832 CM |
1393 | |
1394 | /* the dirty list is only used by non-reference counted roots */ | |
1395 | struct list_head dirty_list; | |
7b128766 | 1396 | |
5d4f98a2 YZ |
1397 | struct list_head root_list; |
1398 | ||
d68fc57b | 1399 | spinlock_t orphan_lock; |
8a35d95f | 1400 | atomic_t orphan_inodes; |
d68fc57b YZ |
1401 | struct btrfs_block_rsv *orphan_block_rsv; |
1402 | int orphan_item_inserted; | |
1403 | int orphan_cleanup_state; | |
3394e160 | 1404 | |
5d4f98a2 YZ |
1405 | spinlock_t inode_lock; |
1406 | /* red-black tree that keeps track of in-memory inodes */ | |
1407 | struct rb_root inode_tree; | |
1408 | ||
16cdcec7 MX |
1409 | /* |
1410 | * radix tree that keeps track of delayed nodes of every inode, | |
1411 | * protected by inode_lock | |
1412 | */ | |
1413 | struct radix_tree_root delayed_nodes_tree; | |
3394e160 CM |
1414 | /* |
1415 | * right now this just gets used so that a root has its own devid | |
1416 | * for stat. It may be used for more later | |
1417 | */ | |
0ee5dc67 | 1418 | dev_t anon_dev; |
f1ebcc74 LB |
1419 | |
1420 | int force_cow; | |
62e2749e CM |
1421 | }; |
1422 | ||
4cb5300b CM |
1423 | struct btrfs_ioctl_defrag_range_args { |
1424 | /* start of the defrag operation */ | |
1425 | __u64 start; | |
1426 | ||
1427 | /* number of bytes to defrag, use (u64)-1 to say all */ | |
1428 | __u64 len; | |
1429 | ||
1430 | /* | |
1431 | * flags for the operation, which can include turning | |
1432 | * on compression for this one defrag | |
1433 | */ | |
1434 | __u64 flags; | |
1435 | ||
1436 | /* | |
1437 | * any extent bigger than this will be considered | |
1438 | * already defragged. Use 0 to take the kernel default | |
1439 | * Use 1 to say every single extent must be rewritten | |
1440 | */ | |
1441 | __u32 extent_thresh; | |
1442 | ||
1443 | /* | |
1444 | * which compression method to use if turning on compression | |
1445 | * for this defrag operation. If unspecified, zlib will | |
1446 | * be used | |
1447 | */ | |
1448 | __u32 compress_type; | |
1449 | ||
1450 | /* spare for later */ | |
1451 | __u32 unused[4]; | |
1452 | }; | |
1453 | ||
1454 | ||
1e1d2701 CM |
1455 | /* |
1456 | * inode items have the data typically returned from stat and store other | |
1457 | * info about object characteristics. There is one for every file and dir in | |
1458 | * the FS | |
1459 | */ | |
9078a3e1 | 1460 | #define BTRFS_INODE_ITEM_KEY 1 |
0660b5af CM |
1461 | #define BTRFS_INODE_REF_KEY 12 |
1462 | #define BTRFS_XATTR_ITEM_KEY 24 | |
1463 | #define BTRFS_ORPHAN_ITEM_KEY 48 | |
9078a3e1 | 1464 | /* reserve 2-15 close to the inode for later flexibility */ |
1e1d2701 CM |
1465 | |
1466 | /* | |
1467 | * dir items are the name -> inode pointers in a directory. There is one | |
1468 | * for every name in a directory. | |
1469 | */ | |
0660b5af CM |
1470 | #define BTRFS_DIR_LOG_ITEM_KEY 60 |
1471 | #define BTRFS_DIR_LOG_INDEX_KEY 72 | |
1472 | #define BTRFS_DIR_ITEM_KEY 84 | |
1473 | #define BTRFS_DIR_INDEX_KEY 96 | |
1e1d2701 | 1474 | /* |
9078a3e1 | 1475 | * extent data is for file data |
1e1d2701 | 1476 | */ |
0660b5af | 1477 | #define BTRFS_EXTENT_DATA_KEY 108 |
d20f7043 | 1478 | |
f254e52c | 1479 | /* |
d20f7043 CM |
1480 | * extent csums are stored in a separate tree and hold csums for |
1481 | * an entire extent on disk. | |
f254e52c | 1482 | */ |
d20f7043 | 1483 | #define BTRFS_EXTENT_CSUM_KEY 128 |
f254e52c | 1484 | |
1e1d2701 | 1485 | /* |
d4a78947 | 1486 | * root items point to tree roots. They are typically in the root |
1e1d2701 CM |
1487 | * tree used by the super block to find all the other trees |
1488 | */ | |
0660b5af CM |
1489 | #define BTRFS_ROOT_ITEM_KEY 132 |
1490 | ||
1491 | /* | |
1492 | * root backrefs tie subvols and snapshots to the directory entries that | |
1493 | * reference them | |
1494 | */ | |
1495 | #define BTRFS_ROOT_BACKREF_KEY 144 | |
1496 | ||
1497 | /* | |
1498 | * root refs make a fast index for listing all of the snapshots and | |
1499 | * subvolumes referenced by a given root. They point directly to the | |
1500 | * directory item in the root that references the subvol | |
1501 | */ | |
1502 | #define BTRFS_ROOT_REF_KEY 156 | |
1503 | ||
1e1d2701 CM |
1504 | /* |
1505 | * extent items are in the extent map tree. These record which blocks | |
1506 | * are used, and how many references there are to each block | |
1507 | */ | |
0660b5af | 1508 | #define BTRFS_EXTENT_ITEM_KEY 168 |
5d4f98a2 YZ |
1509 | |
1510 | #define BTRFS_TREE_BLOCK_REF_KEY 176 | |
1511 | ||
1512 | #define BTRFS_EXTENT_DATA_REF_KEY 178 | |
1513 | ||
1514 | #define BTRFS_EXTENT_REF_V0_KEY 180 | |
1515 | ||
1516 | #define BTRFS_SHARED_BLOCK_REF_KEY 182 | |
1517 | ||
1518 | #define BTRFS_SHARED_DATA_REF_KEY 184 | |
9078a3e1 CM |
1519 | |
1520 | /* | |
1521 | * block groups give us hints into the extent allocation trees. Which | |
1522 | * blocks are free etc etc | |
1523 | */ | |
0660b5af | 1524 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 192 |
9f5fae2f | 1525 | |
0660b5af CM |
1526 | #define BTRFS_DEV_EXTENT_KEY 204 |
1527 | #define BTRFS_DEV_ITEM_KEY 216 | |
1528 | #define BTRFS_CHUNK_ITEM_KEY 228 | |
0b86a832 | 1529 | |
0940ebf6 ID |
1530 | #define BTRFS_BALANCE_ITEM_KEY 248 |
1531 | ||
733f4fbb SB |
1532 | /* |
1533 | * Persistantly stores the io stats in the device tree. | |
1534 | * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid). | |
1535 | */ | |
1536 | #define BTRFS_DEV_STATS_KEY 249 | |
1537 | ||
1e1d2701 CM |
1538 | /* |
1539 | * string items are for debugging. They just store a short string of | |
1540 | * data in the FS | |
1541 | */ | |
9078a3e1 CM |
1542 | #define BTRFS_STRING_ITEM_KEY 253 |
1543 | ||
0942caa3 DS |
1544 | /* |
1545 | * Flags for mount options. | |
1546 | * | |
1547 | * Note: don't forget to add new options to btrfs_show_options() | |
1548 | */ | |
21ad10cf CM |
1549 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
1550 | #define BTRFS_MOUNT_NODATACOW (1 << 1) | |
1551 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) | |
e18e4809 | 1552 | #define BTRFS_MOUNT_SSD (1 << 3) |
dfe25020 | 1553 | #define BTRFS_MOUNT_DEGRADED (1 << 4) |
c8b97818 | 1554 | #define BTRFS_MOUNT_COMPRESS (1 << 5) |
3a5e1404 | 1555 | #define BTRFS_MOUNT_NOTREELOG (1 << 6) |
dccae999 | 1556 | #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) |
451d7585 | 1557 | #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) |
c289811c | 1558 | #define BTRFS_MOUNT_NOSSD (1 << 9) |
e244a0ae | 1559 | #define BTRFS_MOUNT_DISCARD (1 << 10) |
a555f810 | 1560 | #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) |
0af3d00b | 1561 | #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) |
88c2ba3b | 1562 | #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) |
4260f7c7 | 1563 | #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) |
91435650 | 1564 | #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) |
4cb5300b | 1565 | #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) |
4b9465cb | 1566 | #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) |
af31f5e5 | 1567 | #define BTRFS_MOUNT_RECOVERY (1 << 18) |
9555c6c1 | 1568 | #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) |
c126dea7 CM |
1569 | #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) |
1570 | #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) | |
8c342930 | 1571 | #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) |
b6cda9bc CM |
1572 | |
1573 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) | |
1574 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) | |
1575 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ | |
1576 | BTRFS_MOUNT_##opt) | |
b98b6767 Y |
1577 | /* |
1578 | * Inode flags | |
1579 | */ | |
fdebe2bd Y |
1580 | #define BTRFS_INODE_NODATASUM (1 << 0) |
1581 | #define BTRFS_INODE_NODATACOW (1 << 1) | |
1582 | #define BTRFS_INODE_READONLY (1 << 2) | |
c8b97818 | 1583 | #define BTRFS_INODE_NOCOMPRESS (1 << 3) |
d899e052 | 1584 | #define BTRFS_INODE_PREALLOC (1 << 4) |
6cbff00f CH |
1585 | #define BTRFS_INODE_SYNC (1 << 5) |
1586 | #define BTRFS_INODE_IMMUTABLE (1 << 6) | |
1587 | #define BTRFS_INODE_APPEND (1 << 7) | |
1588 | #define BTRFS_INODE_NODUMP (1 << 8) | |
1589 | #define BTRFS_INODE_NOATIME (1 << 9) | |
1590 | #define BTRFS_INODE_DIRSYNC (1 << 10) | |
75e7cb7f | 1591 | #define BTRFS_INODE_COMPRESS (1 << 11) |
6cbff00f | 1592 | |
08fe4db1 LZ |
1593 | #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) |
1594 | ||
cfed81a0 CM |
1595 | struct btrfs_map_token { |
1596 | struct extent_buffer *eb; | |
1597 | char *kaddr; | |
1598 | unsigned long offset; | |
1599 | }; | |
1600 | ||
1601 | static inline void btrfs_init_map_token (struct btrfs_map_token *token) | |
1602 | { | |
1603 | memset(token, 0, sizeof(*token)); | |
1604 | } | |
1605 | ||
5f39d397 CM |
1606 | /* some macros to generate set/get funcs for the struct fields. This |
1607 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | |
1608 | * one for u8: | |
1609 | */ | |
1610 | #define le8_to_cpu(v) (v) | |
1611 | #define cpu_to_le8(v) (v) | |
1612 | #define __le8 u8 | |
1613 | ||
1614 | #define read_eb_member(eb, ptr, type, member, result) ( \ | |
1615 | read_extent_buffer(eb, (char *)(result), \ | |
1616 | ((unsigned long)(ptr)) + \ | |
1617 | offsetof(type, member), \ | |
1618 | sizeof(((type *)0)->member))) | |
1619 | ||
1620 | #define write_eb_member(eb, ptr, type, member, result) ( \ | |
1621 | write_extent_buffer(eb, (char *)(result), \ | |
1622 | ((unsigned long)(ptr)) + \ | |
1623 | offsetof(type, member), \ | |
1624 | sizeof(((type *)0)->member))) | |
1625 | ||
0f82731f | 1626 | #ifndef BTRFS_SETGET_FUNCS |
5f39d397 | 1627 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
0f82731f | 1628 | u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ |
cfed81a0 CM |
1629 | u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, struct btrfs_map_token *token); \ |
1630 | void btrfs_set_token_##name(struct extent_buffer *eb, type *s, u##bits val, struct btrfs_map_token *token);\ | |
0f82731f CM |
1631 | void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); |
1632 | #endif | |
5f39d397 CM |
1633 | |
1634 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | |
1635 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | |
1636 | { \ | |
727011e0 | 1637 | type *p = page_address(eb->pages[0]); \ |
df68b8a7 | 1638 | u##bits res = le##bits##_to_cpu(p->member); \ |
810191ff | 1639 | return res; \ |
5f39d397 CM |
1640 | } \ |
1641 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
1642 | u##bits val) \ | |
1643 | { \ | |
727011e0 | 1644 | type *p = page_address(eb->pages[0]); \ |
df68b8a7 | 1645 | p->member = cpu_to_le##bits(val); \ |
5f39d397 | 1646 | } |
9078a3e1 | 1647 | |
5f39d397 CM |
1648 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
1649 | static inline u##bits btrfs_##name(type *s) \ | |
1650 | { \ | |
1651 | return le##bits##_to_cpu(s->member); \ | |
1652 | } \ | |
1653 | static inline void btrfs_set_##name(type *s, u##bits val) \ | |
1654 | { \ | |
1655 | s->member = cpu_to_le##bits(val); \ | |
1e1d2701 CM |
1656 | } |
1657 | ||
0b86a832 CM |
1658 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
1659 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); | |
1660 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); | |
1661 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); | |
1662 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); | |
c3027eb5 CM |
1663 | BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, |
1664 | start_offset, 64); | |
0b86a832 CM |
1665 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); |
1666 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
1667 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); |
1668 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); | |
1669 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); | |
2b82032c | 1670 | BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); |
0b86a832 | 1671 | |
8a4b83cc CM |
1672 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
1673 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, | |
1674 | total_bytes, 64); | |
1675 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, | |
1676 | bytes_used, 64); | |
1677 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, | |
1678 | io_align, 32); | |
1679 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, | |
1680 | io_width, 32); | |
1681 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, | |
1682 | sector_size, 32); | |
1683 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
1684 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, |
1685 | dev_group, 32); | |
1686 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, | |
1687 | seek_speed, 8); | |
1688 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, | |
1689 | bandwidth, 8); | |
2b82032c YZ |
1690 | BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, |
1691 | generation, 64); | |
8a4b83cc | 1692 | |
0b86a832 CM |
1693 | static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) |
1694 | { | |
1695 | return (char *)d + offsetof(struct btrfs_dev_item, uuid); | |
1696 | } | |
1697 | ||
2b82032c YZ |
1698 | static inline char *btrfs_device_fsid(struct btrfs_dev_item *d) |
1699 | { | |
1700 | return (char *)d + offsetof(struct btrfs_dev_item, fsid); | |
1701 | } | |
1702 | ||
e17cade2 | 1703 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
0b86a832 CM |
1704 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
1705 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); | |
1706 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); | |
1707 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); | |
1708 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); | |
1709 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); | |
1710 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); | |
321aecc6 | 1711 | BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); |
0b86a832 CM |
1712 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
1713 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); | |
1714 | ||
e17cade2 CM |
1715 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
1716 | { | |
1717 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); | |
1718 | } | |
1719 | ||
1720 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); | |
0b86a832 CM |
1721 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
1722 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, | |
1723 | stripe_len, 64); | |
1724 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, | |
1725 | io_align, 32); | |
1726 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, | |
1727 | io_width, 32); | |
1728 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, | |
1729 | sector_size, 32); | |
1730 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); | |
1731 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, | |
1732 | num_stripes, 16); | |
321aecc6 CM |
1733 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, |
1734 | sub_stripes, 16); | |
0b86a832 CM |
1735 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
1736 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); | |
1737 | ||
1738 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, | |
1739 | int nr) | |
1740 | { | |
1741 | unsigned long offset = (unsigned long)c; | |
1742 | offset += offsetof(struct btrfs_chunk, stripe); | |
1743 | offset += nr * sizeof(struct btrfs_stripe); | |
1744 | return (struct btrfs_stripe *)offset; | |
1745 | } | |
1746 | ||
a443755f CM |
1747 | static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) |
1748 | { | |
1749 | return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); | |
1750 | } | |
1751 | ||
0b86a832 CM |
1752 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
1753 | struct btrfs_chunk *c, int nr) | |
1754 | { | |
1755 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); | |
1756 | } | |
1757 | ||
0b86a832 CM |
1758 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, |
1759 | struct btrfs_chunk *c, int nr) | |
1760 | { | |
1761 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); | |
1762 | } | |
1763 | ||
5f39d397 CM |
1764 | /* struct btrfs_block_group_item */ |
1765 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | |
1766 | used, 64); | |
1767 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | |
1768 | used, 64); | |
0b86a832 CM |
1769 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
1770 | struct btrfs_block_group_item, chunk_objectid, 64); | |
e17cade2 CM |
1771 | |
1772 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, | |
0b86a832 CM |
1773 | struct btrfs_block_group_item, chunk_objectid, 64); |
1774 | BTRFS_SETGET_FUNCS(disk_block_group_flags, | |
1775 | struct btrfs_block_group_item, flags, 64); | |
1776 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, | |
1777 | struct btrfs_block_group_item, flags, 64); | |
1e1d2701 | 1778 | |
3954401f CM |
1779 | /* struct btrfs_inode_ref */ |
1780 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); | |
aec7477b | 1781 | BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); |
3954401f | 1782 | |
5f39d397 CM |
1783 | /* struct btrfs_inode_item */ |
1784 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | |
c3027eb5 | 1785 | BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); |
e02119d5 | 1786 | BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); |
5f39d397 | 1787 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); |
a76a3cd4 | 1788 | BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); |
5f39d397 CM |
1789 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); |
1790 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | |
1791 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | |
1792 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | |
1793 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | |
0b86a832 | 1794 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
f2b636e8 | 1795 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); |
1e1d2701 | 1796 | |
0b86a832 | 1797 | static inline struct btrfs_timespec * |
5f39d397 | 1798 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1799 | { |
5f39d397 CM |
1800 | unsigned long ptr = (unsigned long)inode_item; |
1801 | ptr += offsetof(struct btrfs_inode_item, atime); | |
0b86a832 | 1802 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1803 | } |
1804 | ||
0b86a832 | 1805 | static inline struct btrfs_timespec * |
5f39d397 | 1806 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1807 | { |
5f39d397 CM |
1808 | unsigned long ptr = (unsigned long)inode_item; |
1809 | ptr += offsetof(struct btrfs_inode_item, mtime); | |
0b86a832 | 1810 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1811 | } |
1812 | ||
0b86a832 | 1813 | static inline struct btrfs_timespec * |
5f39d397 | 1814 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1815 | { |
5f39d397 CM |
1816 | unsigned long ptr = (unsigned long)inode_item; |
1817 | ptr += offsetof(struct btrfs_inode_item, ctime); | |
0b86a832 | 1818 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1819 | } |
1820 | ||
0b86a832 CM |
1821 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
1822 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); | |
e20d96d6 | 1823 | |
0b86a832 | 1824 | /* struct btrfs_dev_extent */ |
e17cade2 CM |
1825 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
1826 | chunk_tree, 64); | |
1827 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, | |
1828 | chunk_objectid, 64); | |
1829 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, | |
1830 | chunk_offset, 64); | |
0b86a832 CM |
1831 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
1832 | ||
e17cade2 CM |
1833 | static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
1834 | { | |
1835 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); | |
1836 | return (u8 *)((unsigned long)dev + ptr); | |
1837 | } | |
1838 | ||
5d4f98a2 YZ |
1839 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); |
1840 | BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, | |
1841 | generation, 64); | |
1842 | BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); | |
74493f7a | 1843 | |
5d4f98a2 YZ |
1844 | BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); |
1845 | ||
1846 | ||
1847 | BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); | |
1848 | ||
1849 | static inline void btrfs_tree_block_key(struct extent_buffer *eb, | |
1850 | struct btrfs_tree_block_info *item, | |
1851 | struct btrfs_disk_key *key) | |
1852 | { | |
1853 | read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
1854 | } | |
1855 | ||
1856 | static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, | |
1857 | struct btrfs_tree_block_info *item, | |
1858 | struct btrfs_disk_key *key) | |
1859 | { | |
1860 | write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
1861 | } | |
e20d96d6 | 1862 | |
5d4f98a2 YZ |
1863 | BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, |
1864 | root, 64); | |
1865 | BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, | |
1866 | objectid, 64); | |
1867 | BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, | |
1868 | offset, 64); | |
1869 | BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, | |
1870 | count, 32); | |
1871 | ||
1872 | BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, | |
1873 | count, 32); | |
1874 | ||
1875 | BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, | |
1876 | type, 8); | |
1877 | BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, | |
1878 | offset, 64); | |
1879 | ||
1880 | static inline u32 btrfs_extent_inline_ref_size(int type) | |
1881 | { | |
1882 | if (type == BTRFS_TREE_BLOCK_REF_KEY || | |
1883 | type == BTRFS_SHARED_BLOCK_REF_KEY) | |
1884 | return sizeof(struct btrfs_extent_inline_ref); | |
1885 | if (type == BTRFS_SHARED_DATA_REF_KEY) | |
1886 | return sizeof(struct btrfs_shared_data_ref) + | |
1887 | sizeof(struct btrfs_extent_inline_ref); | |
1888 | if (type == BTRFS_EXTENT_DATA_REF_KEY) | |
1889 | return sizeof(struct btrfs_extent_data_ref) + | |
1890 | offsetof(struct btrfs_extent_inline_ref, offset); | |
1891 | BUG(); | |
1892 | return 0; | |
1893 | } | |
1894 | ||
1895 | BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); | |
1896 | BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, | |
1897 | generation, 64); | |
1898 | BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); | |
1899 | BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); | |
e20d96d6 | 1900 | |
5f39d397 CM |
1901 | /* struct btrfs_node */ |
1902 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | |
74493f7a | 1903 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
e20d96d6 | 1904 | |
5f39d397 | 1905 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
cf27e1ee | 1906 | { |
5f39d397 CM |
1907 | unsigned long ptr; |
1908 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1909 | sizeof(struct btrfs_key_ptr) * nr; | |
1910 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | |
cf27e1ee CM |
1911 | } |
1912 | ||
5f39d397 CM |
1913 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
1914 | int nr, u64 val) | |
cf27e1ee | 1915 | { |
5f39d397 CM |
1916 | unsigned long ptr; |
1917 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1918 | sizeof(struct btrfs_key_ptr) * nr; | |
1919 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | |
cf27e1ee CM |
1920 | } |
1921 | ||
74493f7a CM |
1922 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
1923 | { | |
1924 | unsigned long ptr; | |
1925 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1926 | sizeof(struct btrfs_key_ptr) * nr; | |
1927 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); | |
1928 | } | |
1929 | ||
1930 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, | |
1931 | int nr, u64 val) | |
1932 | { | |
1933 | unsigned long ptr; | |
1934 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1935 | sizeof(struct btrfs_key_ptr) * nr; | |
1936 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); | |
1937 | } | |
1938 | ||
810191ff | 1939 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
4d775673 | 1940 | { |
5f39d397 CM |
1941 | return offsetof(struct btrfs_node, ptrs) + |
1942 | sizeof(struct btrfs_key_ptr) * nr; | |
4d775673 CM |
1943 | } |
1944 | ||
e644d021 CM |
1945 | void btrfs_node_key(struct extent_buffer *eb, |
1946 | struct btrfs_disk_key *disk_key, int nr); | |
1947 | ||
5f39d397 CM |
1948 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
1949 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f8a0c | 1950 | { |
5f39d397 CM |
1951 | unsigned long ptr; |
1952 | ptr = btrfs_node_key_ptr_offset(nr); | |
1953 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
1954 | struct btrfs_key_ptr, key, disk_key); | |
1d4f8a0c CM |
1955 | } |
1956 | ||
5f39d397 CM |
1957 | /* struct btrfs_item */ |
1958 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | |
1959 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | |
4d775673 | 1960 | |
5f39d397 | 1961 | static inline unsigned long btrfs_item_nr_offset(int nr) |
1d4f8a0c | 1962 | { |
5f39d397 CM |
1963 | return offsetof(struct btrfs_leaf, items) + |
1964 | sizeof(struct btrfs_item) * nr; | |
1d4f8a0c CM |
1965 | } |
1966 | ||
5f39d397 CM |
1967 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
1968 | int nr) | |
0783fcfc | 1969 | { |
5f39d397 | 1970 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
0783fcfc CM |
1971 | } |
1972 | ||
5f39d397 CM |
1973 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
1974 | struct btrfs_item *item) | |
0783fcfc | 1975 | { |
5f39d397 | 1976 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
0783fcfc CM |
1977 | } |
1978 | ||
5f39d397 | 1979 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1980 | { |
5f39d397 | 1981 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1982 | } |
1983 | ||
5f39d397 | 1984 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1985 | { |
5f39d397 | 1986 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1987 | } |
1988 | ||
5f39d397 | 1989 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1990 | { |
5f39d397 | 1991 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1992 | } |
1993 | ||
5f39d397 CM |
1994 | static inline void btrfs_item_key(struct extent_buffer *eb, |
1995 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 1996 | { |
5f39d397 CM |
1997 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
1998 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
1999 | } |
2000 | ||
5f39d397 CM |
2001 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
2002 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 2003 | { |
5f39d397 CM |
2004 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
2005 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
2006 | } |
2007 | ||
e02119d5 CM |
2008 | BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); |
2009 | ||
0660b5af CM |
2010 | /* |
2011 | * struct btrfs_root_ref | |
2012 | */ | |
2013 | BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); | |
2014 | BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); | |
2015 | BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); | |
2016 | ||
5f39d397 | 2017 | /* struct btrfs_dir_item */ |
5103e947 | 2018 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
5f39d397 CM |
2019 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
2020 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | |
e02119d5 | 2021 | BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); |
1d4f6404 | 2022 | |
5f39d397 CM |
2023 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
2024 | struct btrfs_dir_item *item, | |
2025 | struct btrfs_disk_key *key) | |
1d4f6404 | 2026 | { |
5f39d397 | 2027 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
1d4f6404 CM |
2028 | } |
2029 | ||
5f39d397 CM |
2030 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
2031 | struct btrfs_dir_item *item, | |
2032 | struct btrfs_disk_key *key) | |
a8a2ee0c | 2033 | { |
5f39d397 | 2034 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
a8a2ee0c CM |
2035 | } |
2036 | ||
0af3d00b JB |
2037 | BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, |
2038 | num_entries, 64); | |
2039 | BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, | |
2040 | num_bitmaps, 64); | |
2041 | BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, | |
2042 | generation, 64); | |
2043 | ||
2044 | static inline void btrfs_free_space_key(struct extent_buffer *eb, | |
2045 | struct btrfs_free_space_header *h, | |
2046 | struct btrfs_disk_key *key) | |
2047 | { | |
2048 | read_eb_member(eb, h, struct btrfs_free_space_header, location, key); | |
2049 | } | |
2050 | ||
2051 | static inline void btrfs_set_free_space_key(struct extent_buffer *eb, | |
2052 | struct btrfs_free_space_header *h, | |
2053 | struct btrfs_disk_key *key) | |
2054 | { | |
2055 | write_eb_member(eb, h, struct btrfs_free_space_header, location, key); | |
2056 | } | |
2057 | ||
5f39d397 CM |
2058 | /* struct btrfs_disk_key */ |
2059 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | |
2060 | objectid, 64); | |
2061 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | |
2062 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | |
1d4f6404 | 2063 | |
e2fa7227 CM |
2064 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
2065 | struct btrfs_disk_key *disk) | |
2066 | { | |
2067 | cpu->offset = le64_to_cpu(disk->offset); | |
5f39d397 | 2068 | cpu->type = disk->type; |
e2fa7227 CM |
2069 | cpu->objectid = le64_to_cpu(disk->objectid); |
2070 | } | |
2071 | ||
2072 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
2073 | struct btrfs_key *cpu) | |
2074 | { | |
2075 | disk->offset = cpu_to_le64(cpu->offset); | |
5f39d397 | 2076 | disk->type = cpu->type; |
e2fa7227 CM |
2077 | disk->objectid = cpu_to_le64(cpu->objectid); |
2078 | } | |
2079 | ||
5f39d397 CM |
2080 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
2081 | struct btrfs_key *key, int nr) | |
7f5c1516 | 2082 | { |
5f39d397 CM |
2083 | struct btrfs_disk_key disk_key; |
2084 | btrfs_node_key(eb, &disk_key, nr); | |
2085 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
2086 | } |
2087 | ||
5f39d397 CM |
2088 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
2089 | struct btrfs_key *key, int nr) | |
7f5c1516 | 2090 | { |
5f39d397 CM |
2091 | struct btrfs_disk_key disk_key; |
2092 | btrfs_item_key(eb, &disk_key, nr); | |
2093 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
2094 | } |
2095 | ||
5f39d397 CM |
2096 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
2097 | struct btrfs_dir_item *item, | |
2098 | struct btrfs_key *key) | |
4d775673 | 2099 | { |
5f39d397 CM |
2100 | struct btrfs_disk_key disk_key; |
2101 | btrfs_dir_item_key(eb, item, &disk_key); | |
2102 | btrfs_disk_key_to_cpu(key, &disk_key); | |
4d775673 CM |
2103 | } |
2104 | ||
58176a96 | 2105 | |
5f39d397 | 2106 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
3768f368 | 2107 | { |
5f39d397 | 2108 | return key->type; |
3768f368 CM |
2109 | } |
2110 | ||
5f39d397 | 2111 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
3768f368 | 2112 | { |
5f39d397 | 2113 | key->type = val; |
3768f368 CM |
2114 | } |
2115 | ||
5f39d397 | 2116 | /* struct btrfs_header */ |
db94535d | 2117 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
5f39d397 CM |
2118 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
2119 | generation, 64); | |
2120 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | |
2121 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | |
63b10fc4 | 2122 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
5f39d397 | 2123 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
0f7d52f4 | 2124 | |
63b10fc4 CM |
2125 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) |
2126 | { | |
2127 | return (btrfs_header_flags(eb) & flag) == flag; | |
2128 | } | |
2129 | ||
2130 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) | |
2131 | { | |
2132 | u64 flags = btrfs_header_flags(eb); | |
2133 | btrfs_set_header_flags(eb, flags | flag); | |
2134 | return (flags & flag) == flag; | |
2135 | } | |
2136 | ||
2137 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) | |
2138 | { | |
2139 | u64 flags = btrfs_header_flags(eb); | |
2140 | btrfs_set_header_flags(eb, flags & ~flag); | |
2141 | return (flags & flag) == flag; | |
2142 | } | |
2143 | ||
5d4f98a2 YZ |
2144 | static inline int btrfs_header_backref_rev(struct extent_buffer *eb) |
2145 | { | |
2146 | u64 flags = btrfs_header_flags(eb); | |
2147 | return flags >> BTRFS_BACKREF_REV_SHIFT; | |
2148 | } | |
2149 | ||
2150 | static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, | |
2151 | int rev) | |
2152 | { | |
2153 | u64 flags = btrfs_header_flags(eb); | |
2154 | flags &= ~BTRFS_BACKREF_REV_MASK; | |
2155 | flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; | |
2156 | btrfs_set_header_flags(eb, flags); | |
2157 | } | |
2158 | ||
5f39d397 | 2159 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
0f7d52f4 | 2160 | { |
5f39d397 CM |
2161 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
2162 | return (u8 *)ptr; | |
0f7d52f4 CM |
2163 | } |
2164 | ||
e17cade2 CM |
2165 | static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) |
2166 | { | |
2167 | unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid); | |
2168 | return (u8 *)ptr; | |
2169 | } | |
2170 | ||
5f39d397 | 2171 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
3768f368 | 2172 | { |
d397712b | 2173 | return btrfs_header_level(eb) == 0; |
3768f368 CM |
2174 | } |
2175 | ||
5f39d397 | 2176 | /* struct btrfs_root_item */ |
84234f3a YZ |
2177 | BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, |
2178 | generation, 64); | |
5f39d397 | 2179 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); |
db94535d CM |
2180 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
2181 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); | |
3768f368 | 2182 | |
84234f3a YZ |
2183 | BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, |
2184 | generation, 64); | |
db94535d CM |
2185 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
2186 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); | |
5f39d397 CM |
2187 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
2188 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | |
f2b636e8 | 2189 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); |
db94535d CM |
2190 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
2191 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); | |
80ff3856 YZ |
2192 | BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, |
2193 | last_snapshot, 64); | |
123abc88 | 2194 | |
b83cc969 LZ |
2195 | static inline bool btrfs_root_readonly(struct btrfs_root *root) |
2196 | { | |
6ed3cf2c | 2197 | return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; |
b83cc969 LZ |
2198 | } |
2199 | ||
af31f5e5 CM |
2200 | /* struct btrfs_root_backup */ |
2201 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, | |
2202 | tree_root, 64); | |
2203 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, | |
2204 | tree_root_gen, 64); | |
2205 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, | |
2206 | tree_root_level, 8); | |
2207 | ||
2208 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, | |
2209 | chunk_root, 64); | |
2210 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, | |
2211 | chunk_root_gen, 64); | |
2212 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, | |
2213 | chunk_root_level, 8); | |
2214 | ||
2215 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, | |
2216 | extent_root, 64); | |
2217 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, | |
2218 | extent_root_gen, 64); | |
2219 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, | |
2220 | extent_root_level, 8); | |
2221 | ||
2222 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, | |
2223 | fs_root, 64); | |
2224 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, | |
2225 | fs_root_gen, 64); | |
2226 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, | |
2227 | fs_root_level, 8); | |
2228 | ||
2229 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, | |
2230 | dev_root, 64); | |
2231 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, | |
2232 | dev_root_gen, 64); | |
2233 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, | |
2234 | dev_root_level, 8); | |
2235 | ||
2236 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, | |
2237 | csum_root, 64); | |
2238 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, | |
2239 | csum_root_gen, 64); | |
2240 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, | |
2241 | csum_root_level, 8); | |
2242 | BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, | |
2243 | total_bytes, 64); | |
2244 | BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, | |
2245 | bytes_used, 64); | |
2246 | BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, | |
2247 | num_devices, 64); | |
2248 | ||
0940ebf6 ID |
2249 | /* struct btrfs_balance_item */ |
2250 | BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); | |
607d432d | 2251 | |
0940ebf6 ID |
2252 | static inline void btrfs_balance_data(struct extent_buffer *eb, |
2253 | struct btrfs_balance_item *bi, | |
2254 | struct btrfs_disk_balance_args *ba) | |
2255 | { | |
2256 | read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); | |
2257 | } | |
2258 | ||
2259 | static inline void btrfs_set_balance_data(struct extent_buffer *eb, | |
2260 | struct btrfs_balance_item *bi, | |
2261 | struct btrfs_disk_balance_args *ba) | |
2262 | { | |
2263 | write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); | |
2264 | } | |
2265 | ||
2266 | static inline void btrfs_balance_meta(struct extent_buffer *eb, | |
2267 | struct btrfs_balance_item *bi, | |
2268 | struct btrfs_disk_balance_args *ba) | |
2269 | { | |
2270 | read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); | |
2271 | } | |
2272 | ||
2273 | static inline void btrfs_set_balance_meta(struct extent_buffer *eb, | |
2274 | struct btrfs_balance_item *bi, | |
2275 | struct btrfs_disk_balance_args *ba) | |
2276 | { | |
2277 | write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); | |
2278 | } | |
2279 | ||
2280 | static inline void btrfs_balance_sys(struct extent_buffer *eb, | |
2281 | struct btrfs_balance_item *bi, | |
2282 | struct btrfs_disk_balance_args *ba) | |
2283 | { | |
2284 | read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); | |
2285 | } | |
2286 | ||
2287 | static inline void btrfs_set_balance_sys(struct extent_buffer *eb, | |
2288 | struct btrfs_balance_item *bi, | |
2289 | struct btrfs_disk_balance_args *ba) | |
2290 | { | |
2291 | write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); | |
2292 | } | |
2293 | ||
2294 | static inline void | |
2295 | btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, | |
2296 | struct btrfs_disk_balance_args *disk) | |
2297 | { | |
2298 | memset(cpu, 0, sizeof(*cpu)); | |
2299 | ||
2300 | cpu->profiles = le64_to_cpu(disk->profiles); | |
2301 | cpu->usage = le64_to_cpu(disk->usage); | |
2302 | cpu->devid = le64_to_cpu(disk->devid); | |
2303 | cpu->pstart = le64_to_cpu(disk->pstart); | |
2304 | cpu->pend = le64_to_cpu(disk->pend); | |
2305 | cpu->vstart = le64_to_cpu(disk->vstart); | |
2306 | cpu->vend = le64_to_cpu(disk->vend); | |
2307 | cpu->target = le64_to_cpu(disk->target); | |
2308 | cpu->flags = le64_to_cpu(disk->flags); | |
2309 | } | |
2310 | ||
2311 | static inline void | |
2312 | btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, | |
2313 | struct btrfs_balance_args *cpu) | |
2314 | { | |
2315 | memset(disk, 0, sizeof(*disk)); | |
2316 | ||
2317 | disk->profiles = cpu_to_le64(cpu->profiles); | |
2318 | disk->usage = cpu_to_le64(cpu->usage); | |
2319 | disk->devid = cpu_to_le64(cpu->devid); | |
2320 | disk->pstart = cpu_to_le64(cpu->pstart); | |
2321 | disk->pend = cpu_to_le64(cpu->pend); | |
2322 | disk->vstart = cpu_to_le64(cpu->vstart); | |
2323 | disk->vend = cpu_to_le64(cpu->vend); | |
2324 | disk->target = cpu_to_le64(cpu->target); | |
2325 | disk->flags = cpu_to_le64(cpu->flags); | |
2326 | } | |
2327 | ||
2328 | /* struct btrfs_super_block */ | |
db94535d | 2329 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
a061fc8d | 2330 | BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); |
5f39d397 CM |
2331 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
2332 | generation, 64); | |
2333 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | |
0b86a832 CM |
2334 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
2335 | struct btrfs_super_block, sys_chunk_array_size, 32); | |
84234f3a YZ |
2336 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, |
2337 | struct btrfs_super_block, chunk_root_generation, 64); | |
db94535d CM |
2338 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
2339 | root_level, 8); | |
0b86a832 CM |
2340 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
2341 | chunk_root, 64); | |
2342 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, | |
e02119d5 CM |
2343 | chunk_root_level, 8); |
2344 | BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, | |
2345 | log_root, 64); | |
c3027eb5 CM |
2346 | BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, |
2347 | log_root_transid, 64); | |
e02119d5 CM |
2348 | BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, |
2349 | log_root_level, 8); | |
db94535d CM |
2350 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
2351 | total_bytes, 64); | |
2352 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, | |
2353 | bytes_used, 64); | |
5f39d397 CM |
2354 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
2355 | sectorsize, 32); | |
2356 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | |
2357 | nodesize, 32); | |
2358 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, | |
2359 | leafsize, 32); | |
87ee04eb CM |
2360 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
2361 | stripesize, 32); | |
5f39d397 CM |
2362 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
2363 | root_dir_objectid, 64); | |
8a4b83cc CM |
2364 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
2365 | num_devices, 64); | |
f2b636e8 JB |
2366 | BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, |
2367 | compat_flags, 64); | |
2368 | BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, | |
12534832 | 2369 | compat_ro_flags, 64); |
f2b636e8 JB |
2370 | BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, |
2371 | incompat_flags, 64); | |
607d432d JB |
2372 | BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, |
2373 | csum_type, 16); | |
0af3d00b JB |
2374 | BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, |
2375 | cache_generation, 64); | |
607d432d JB |
2376 | |
2377 | static inline int btrfs_super_csum_size(struct btrfs_super_block *s) | |
2378 | { | |
2379 | int t = btrfs_super_csum_type(s); | |
2380 | BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes)); | |
2381 | return btrfs_csum_sizes[t]; | |
2382 | } | |
2e635a27 | 2383 | |
5f39d397 | 2384 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
2e635a27 | 2385 | { |
5f39d397 | 2386 | return offsetof(struct btrfs_leaf, items); |
2e635a27 CM |
2387 | } |
2388 | ||
5f39d397 CM |
2389 | /* struct btrfs_file_extent_item */ |
2390 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | |
9f5fae2f | 2391 | |
d397712b CM |
2392 | static inline unsigned long |
2393 | btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) | |
236454df | 2394 | { |
5f39d397 | 2395 | unsigned long offset = (unsigned long)e; |
db94535d | 2396 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 2397 | return offset; |
236454df CM |
2398 | } |
2399 | ||
2400 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
2401 | { | |
db94535d | 2402 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
9f5fae2f CM |
2403 | } |
2404 | ||
db94535d CM |
2405 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
2406 | disk_bytenr, 64); | |
5f39d397 CM |
2407 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
2408 | generation, 64); | |
db94535d CM |
2409 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
2410 | disk_num_bytes, 64); | |
5f39d397 CM |
2411 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
2412 | offset, 64); | |
db94535d CM |
2413 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
2414 | num_bytes, 64); | |
c8b97818 CM |
2415 | BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, |
2416 | ram_bytes, 64); | |
2417 | BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, | |
2418 | compression, 8); | |
2419 | BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, | |
2420 | encryption, 8); | |
2421 | BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, | |
2422 | other_encoding, 16); | |
2423 | ||
2424 | /* this returns the number of file bytes represented by the inline item. | |
2425 | * If an item is compressed, this is the uncompressed size | |
2426 | */ | |
2427 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, | |
2428 | struct btrfs_file_extent_item *e) | |
2429 | { | |
2430 | return btrfs_file_extent_ram_bytes(eb, e); | |
2431 | } | |
2432 | ||
2433 | /* | |
2434 | * this returns the number of bytes used by the item on disk, minus the | |
2435 | * size of any extent headers. If a file is compressed on disk, this is | |
2436 | * the compressed size | |
2437 | */ | |
2438 | static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, | |
2439 | struct btrfs_item *e) | |
2440 | { | |
2441 | unsigned long offset; | |
2442 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); | |
2443 | return btrfs_item_size(eb, e) - offset; | |
2444 | } | |
9f5fae2f | 2445 | |
733f4fbb SB |
2446 | /* btrfs_dev_stats_item */ |
2447 | static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb, | |
2448 | struct btrfs_dev_stats_item *ptr, | |
2449 | int index) | |
2450 | { | |
2451 | u64 val; | |
2452 | ||
2453 | read_extent_buffer(eb, &val, | |
2454 | offsetof(struct btrfs_dev_stats_item, values) + | |
2455 | ((unsigned long)ptr) + (index * sizeof(u64)), | |
2456 | sizeof(val)); | |
2457 | return val; | |
2458 | } | |
2459 | ||
2460 | static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, | |
2461 | struct btrfs_dev_stats_item *ptr, | |
2462 | int index, u64 val) | |
2463 | { | |
2464 | write_extent_buffer(eb, &val, | |
2465 | offsetof(struct btrfs_dev_stats_item, values) + | |
2466 | ((unsigned long)ptr) + (index * sizeof(u64)), | |
2467 | sizeof(val)); | |
2468 | } | |
2469 | ||
815745cf | 2470 | static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) |
e20d96d6 CM |
2471 | { |
2472 | return sb->s_fs_info; | |
2473 | } | |
2474 | ||
d397712b CM |
2475 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) |
2476 | { | |
db94535d CM |
2477 | if (level == 0) |
2478 | return root->leafsize; | |
2479 | return root->nodesize; | |
2480 | } | |
2481 | ||
4beb1b8b CM |
2482 | /* helper function to cast into the data area of the leaf. */ |
2483 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 | 2484 | ((type *)(btrfs_leaf_data(leaf) + \ |
5f39d397 CM |
2485 | btrfs_item_offset_nr(leaf, slot))) |
2486 | ||
2487 | #define btrfs_item_ptr_offset(leaf, slot) \ | |
2488 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | |
2489 | btrfs_item_offset_nr(leaf, slot))) | |
4beb1b8b | 2490 | |
2b1f55b0 CM |
2491 | static inline struct dentry *fdentry(struct file *file) |
2492 | { | |
6da6abae | 2493 | return file->f_path.dentry; |
6da6abae CM |
2494 | } |
2495 | ||
67377734 JB |
2496 | static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) |
2497 | { | |
2498 | return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && | |
2499 | (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); | |
2500 | } | |
2501 | ||
3b16a4e3 JB |
2502 | static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) |
2503 | { | |
2504 | return mapping_gfp_mask(mapping) & ~__GFP_FS; | |
2505 | } | |
2506 | ||
b18c6685 | 2507 | /* extent-tree.c */ |
16cdcec7 | 2508 | static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root, |
9e0baf60 | 2509 | unsigned num_items) |
16cdcec7 MX |
2510 | { |
2511 | return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) * | |
2512 | 3 * num_items; | |
07127184 JB |
2513 | } |
2514 | ||
2515 | /* | |
2516 | * Doing a truncate won't result in new nodes or leaves, just what we need for | |
2517 | * COW. | |
2518 | */ | |
2519 | static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root, | |
2520 | unsigned num_items) | |
2521 | { | |
2522 | return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) * | |
2523 | num_items; | |
16cdcec7 MX |
2524 | } |
2525 | ||
fa9c0d79 | 2526 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
56bec294 CM |
2527 | int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, |
2528 | struct btrfs_root *root, unsigned long count); | |
31840ae1 | 2529 | int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len); |
a22285a6 YZ |
2530 | int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, |
2531 | struct btrfs_root *root, u64 bytenr, | |
2532 | u64 num_bytes, u64 *refs, u64 *flags); | |
11833d66 YZ |
2533 | int btrfs_pin_extent(struct btrfs_root *root, |
2534 | u64 bytenr, u64 num, int reserved); | |
e688b725 CM |
2535 | int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, |
2536 | struct btrfs_root *root, | |
2537 | u64 bytenr, u64 num_bytes); | |
80ff3856 | 2538 | int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, |
5d4f98a2 YZ |
2539 | struct btrfs_root *root, |
2540 | u64 objectid, u64 offset, u64 bytenr); | |
d397712b CM |
2541 | struct btrfs_block_group_cache *btrfs_lookup_block_group( |
2542 | struct btrfs_fs_info *info, | |
2543 | u64 bytenr); | |
5d4f98a2 | 2544 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
d2fb3437 YZ |
2545 | u64 btrfs_find_block_group(struct btrfs_root *root, |
2546 | u64 search_start, u64 search_hint, int owner); | |
5f39d397 | 2547 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
5d4f98a2 YZ |
2548 | struct btrfs_root *root, u32 blocksize, |
2549 | u64 parent, u64 root_objectid, | |
2550 | struct btrfs_disk_key *key, int level, | |
5581a51a | 2551 | u64 hint, u64 empty_size); |
f0486c68 YZ |
2552 | void btrfs_free_tree_block(struct btrfs_trans_handle *trans, |
2553 | struct btrfs_root *root, | |
2554 | struct extent_buffer *buf, | |
5581a51a | 2555 | u64 parent, int last_ref); |
65b51a00 CM |
2556 | struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans, |
2557 | struct btrfs_root *root, | |
4008c04a CM |
2558 | u64 bytenr, u32 blocksize, |
2559 | int level); | |
5d4f98a2 YZ |
2560 | int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, |
2561 | struct btrfs_root *root, | |
2562 | u64 root_objectid, u64 owner, | |
2563 | u64 offset, struct btrfs_key *ins); | |
2564 | int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, | |
2565 | struct btrfs_root *root, | |
2566 | u64 root_objectid, u64 owner, u64 offset, | |
2567 | struct btrfs_key *ins); | |
e6dcd2dc CM |
2568 | int btrfs_reserve_extent(struct btrfs_trans_handle *trans, |
2569 | struct btrfs_root *root, | |
2570 | u64 num_bytes, u64 min_alloc_size, | |
2571 | u64 empty_size, u64 hint_byte, | |
81c9ad23 | 2572 | struct btrfs_key *ins, u64 data); |
e089f05c | 2573 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
66d7e7f0 | 2574 | struct extent_buffer *buf, int full_backref, int for_cow); |
5d4f98a2 | 2575 | int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
66d7e7f0 | 2576 | struct extent_buffer *buf, int full_backref, int for_cow); |
5d4f98a2 YZ |
2577 | int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, |
2578 | struct btrfs_root *root, | |
2579 | u64 bytenr, u64 num_bytes, u64 flags, | |
2580 | int is_data); | |
31840ae1 ZY |
2581 | int btrfs_free_extent(struct btrfs_trans_handle *trans, |
2582 | struct btrfs_root *root, | |
66d7e7f0 AJ |
2583 | u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, |
2584 | u64 owner, u64 offset, int for_cow); | |
5d4f98a2 | 2585 | |
65b51a00 | 2586 | int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len); |
e688b725 CM |
2587 | int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root, |
2588 | u64 start, u64 len); | |
143bede5 JM |
2589 | void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, |
2590 | struct btrfs_root *root); | |
ccd467d6 | 2591 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
11833d66 | 2592 | struct btrfs_root *root); |
b18c6685 | 2593 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
31840ae1 ZY |
2594 | struct btrfs_root *root, |
2595 | u64 bytenr, u64 num_bytes, u64 parent, | |
66d7e7f0 | 2596 | u64 root_objectid, u64 owner, u64 offset, int for_cow); |
5d4f98a2 | 2597 | |
9078a3e1 CM |
2598 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
2599 | struct btrfs_root *root); | |
d2fb3437 | 2600 | int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr); |
9078a3e1 CM |
2601 | int btrfs_free_block_groups(struct btrfs_fs_info *info); |
2602 | int btrfs_read_block_groups(struct btrfs_root *root); | |
ba1bf481 | 2603 | int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr); |
0b86a832 CM |
2604 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
2605 | struct btrfs_root *root, u64 bytes_used, | |
e17cade2 | 2606 | u64 type, u64 chunk_objectid, u64 chunk_offset, |
0b86a832 | 2607 | u64 size); |
1a40e23b ZY |
2608 | int btrfs_remove_block_group(struct btrfs_trans_handle *trans, |
2609 | struct btrfs_root *root, u64 group_start); | |
2b82032c | 2610 | u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags); |
6d07bcec | 2611 | u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data); |
4184ea7f | 2612 | void btrfs_clear_space_info_full(struct btrfs_fs_info *info); |
0ca1f7ce YZ |
2613 | int btrfs_check_data_free_space(struct inode *inode, u64 bytes); |
2614 | void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes); | |
a22285a6 YZ |
2615 | void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, |
2616 | struct btrfs_root *root); | |
d68fc57b YZ |
2617 | int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, |
2618 | struct inode *inode); | |
2619 | void btrfs_orphan_release_metadata(struct inode *inode); | |
a22285a6 YZ |
2620 | int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans, |
2621 | struct btrfs_pending_snapshot *pending); | |
0ca1f7ce YZ |
2622 | int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes); |
2623 | void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes); | |
2624 | int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes); | |
2625 | void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes); | |
f0486c68 YZ |
2626 | void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv); |
2627 | struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root); | |
2628 | void btrfs_free_block_rsv(struct btrfs_root *root, | |
2629 | struct btrfs_block_rsv *rsv); | |
4a92b1b8 | 2630 | int btrfs_block_rsv_add(struct btrfs_root *root, |
f0486c68 | 2631 | struct btrfs_block_rsv *block_rsv, |
8bb8ab2e | 2632 | u64 num_bytes); |
c06a0e12 JB |
2633 | int btrfs_block_rsv_add_noflush(struct btrfs_root *root, |
2634 | struct btrfs_block_rsv *block_rsv, | |
2635 | u64 num_bytes); | |
4a92b1b8 | 2636 | int btrfs_block_rsv_check(struct btrfs_root *root, |
36ba022a JB |
2637 | struct btrfs_block_rsv *block_rsv, int min_factor); |
2638 | int btrfs_block_rsv_refill(struct btrfs_root *root, | |
f0486c68 | 2639 | struct btrfs_block_rsv *block_rsv, |
36ba022a | 2640 | u64 min_reserved); |
aa38a711 MX |
2641 | int btrfs_block_rsv_refill_noflush(struct btrfs_root *root, |
2642 | struct btrfs_block_rsv *block_rsv, | |
2643 | u64 min_reserved); | |
f0486c68 YZ |
2644 | int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, |
2645 | struct btrfs_block_rsv *dst_rsv, | |
2646 | u64 num_bytes); | |
2647 | void btrfs_block_rsv_release(struct btrfs_root *root, | |
2648 | struct btrfs_block_rsv *block_rsv, | |
2649 | u64 num_bytes); | |
2650 | int btrfs_set_block_group_ro(struct btrfs_root *root, | |
2651 | struct btrfs_block_group_cache *cache); | |
143bede5 JM |
2652 | void btrfs_set_block_group_rw(struct btrfs_root *root, |
2653 | struct btrfs_block_group_cache *cache); | |
0af3d00b | 2654 | void btrfs_put_block_group_cache(struct btrfs_fs_info *info); |
6d07bcec | 2655 | u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); |
acce952b | 2656 | int btrfs_error_unpin_extent_range(struct btrfs_root *root, |
2657 | u64 start, u64 end); | |
2658 | int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr, | |
5378e607 | 2659 | u64 num_bytes, u64 *actual_bytes); |
c87f08ca CM |
2660 | int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, |
2661 | struct btrfs_root *root, u64 type); | |
f7039b1d | 2662 | int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range); |
acce952b | 2663 | |
c59021f8 | 2664 | int btrfs_init_space_info(struct btrfs_fs_info *fs_info); |
dee26a9f | 2665 | /* ctree.c */ |
5d4f98a2 YZ |
2666 | int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, |
2667 | int level, int *slot); | |
2668 | int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); | |
0b86a832 CM |
2669 | int btrfs_previous_item(struct btrfs_root *root, |
2670 | struct btrfs_path *path, u64 min_objectid, | |
2671 | int type); | |
143bede5 JM |
2672 | void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, |
2673 | struct btrfs_root *root, struct btrfs_path *path, | |
2674 | struct btrfs_key *new_key); | |
925baedd CM |
2675 | struct extent_buffer *btrfs_root_node(struct btrfs_root *root); |
2676 | struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); | |
e7a84565 | 2677 | int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, |
3f157a2f CM |
2678 | struct btrfs_key *key, int lowest_level, |
2679 | int cache_only, u64 min_trans); | |
2680 | int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, | |
e02119d5 | 2681 | struct btrfs_key *max_key, |
3f157a2f CM |
2682 | struct btrfs_path *path, int cache_only, |
2683 | u64 min_trans); | |
5f39d397 CM |
2684 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
2685 | struct btrfs_root *root, struct extent_buffer *buf, | |
2686 | struct extent_buffer *parent, int parent_slot, | |
9fa8cfe7 | 2687 | struct extent_buffer **cow_ret); |
be20aa9d CM |
2688 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
2689 | struct btrfs_root *root, | |
2690 | struct extent_buffer *buf, | |
2691 | struct extent_buffer **cow_ret, u64 new_root_objectid); | |
5d4f98a2 YZ |
2692 | int btrfs_block_can_be_shared(struct btrfs_root *root, |
2693 | struct extent_buffer *buf); | |
143bede5 JM |
2694 | void btrfs_extend_item(struct btrfs_trans_handle *trans, |
2695 | struct btrfs_root *root, struct btrfs_path *path, | |
2696 | u32 data_size); | |
2697 | void btrfs_truncate_item(struct btrfs_trans_handle *trans, | |
2698 | struct btrfs_root *root, | |
2699 | struct btrfs_path *path, | |
2700 | u32 new_size, int from_end); | |
459931ec CM |
2701 | int btrfs_split_item(struct btrfs_trans_handle *trans, |
2702 | struct btrfs_root *root, | |
2703 | struct btrfs_path *path, | |
2704 | struct btrfs_key *new_key, | |
2705 | unsigned long split_offset); | |
ad48fd75 YZ |
2706 | int btrfs_duplicate_item(struct btrfs_trans_handle *trans, |
2707 | struct btrfs_root *root, | |
2708 | struct btrfs_path *path, | |
2709 | struct btrfs_key *new_key); | |
e089f05c CM |
2710 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
2711 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
2712 | ins_len, int cow); | |
5d9e75c4 JS |
2713 | int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key, |
2714 | struct btrfs_path *p, u64 time_seq); | |
6702ed49 | 2715 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
5f39d397 | 2716 | struct btrfs_root *root, struct extent_buffer *parent, |
a6b6e75e CM |
2717 | int start_slot, int cache_only, u64 *last_ret, |
2718 | struct btrfs_key *progress); | |
b3b4aa74 | 2719 | void btrfs_release_path(struct btrfs_path *p); |
2c90e5d6 CM |
2720 | struct btrfs_path *btrfs_alloc_path(void); |
2721 | void btrfs_free_path(struct btrfs_path *p); | |
b4ce94de | 2722 | void btrfs_set_path_blocking(struct btrfs_path *p); |
16cdcec7 | 2723 | void btrfs_clear_path_blocking(struct btrfs_path *p, |
bd681513 | 2724 | struct extent_buffer *held, int held_rw); |
b4ce94de CM |
2725 | void btrfs_unlock_up_safe(struct btrfs_path *p, int level); |
2726 | ||
85e21bac CM |
2727 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
2728 | struct btrfs_path *path, int slot, int nr); | |
85e21bac CM |
2729 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, |
2730 | struct btrfs_root *root, | |
2731 | struct btrfs_path *path) | |
2732 | { | |
2733 | return btrfs_del_items(trans, root, path, path->slots[0], 1); | |
2734 | } | |
2735 | ||
143bede5 JM |
2736 | void setup_items_for_insert(struct btrfs_trans_handle *trans, |
2737 | struct btrfs_root *root, struct btrfs_path *path, | |
2738 | struct btrfs_key *cpu_key, u32 *data_size, | |
2739 | u32 total_data, u32 total_size, int nr); | |
e089f05c CM |
2740 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
2741 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
9c58309d CM |
2742 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
2743 | struct btrfs_root *root, | |
2744 | struct btrfs_path *path, | |
2745 | struct btrfs_key *cpu_key, u32 *data_size, int nr); | |
2746 | ||
2747 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, | |
2748 | struct btrfs_root *root, | |
2749 | struct btrfs_path *path, | |
2750 | struct btrfs_key *key, | |
2751 | u32 data_size) | |
2752 | { | |
2753 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); | |
2754 | } | |
2755 | ||
234b63a0 | 2756 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
3d7806ec JS |
2757 | int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, |
2758 | u64 time_seq); | |
1c8f52a5 AB |
2759 | static inline int btrfs_next_old_item(struct btrfs_root *root, |
2760 | struct btrfs_path *p, u64 time_seq) | |
c7d22a3c JS |
2761 | { |
2762 | ++p->slots[0]; | |
2763 | if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) | |
1c8f52a5 | 2764 | return btrfs_next_old_leaf(root, p, time_seq); |
c7d22a3c JS |
2765 | return 0; |
2766 | } | |
1c8f52a5 AB |
2767 | static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) |
2768 | { | |
2769 | return btrfs_next_old_item(root, p, 0); | |
2770 | } | |
7bb86316 | 2771 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
5f39d397 | 2772 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
2c536799 JM |
2773 | int __must_check btrfs_drop_snapshot(struct btrfs_root *root, |
2774 | struct btrfs_block_rsv *block_rsv, | |
2775 | int update_ref, int for_reloc); | |
f82d02d9 YZ |
2776 | int btrfs_drop_subtree(struct btrfs_trans_handle *trans, |
2777 | struct btrfs_root *root, | |
2778 | struct extent_buffer *node, | |
2779 | struct extent_buffer *parent); | |
7841cb28 DS |
2780 | static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) |
2781 | { | |
2782 | /* | |
2783 | * Get synced with close_ctree() | |
2784 | */ | |
2785 | smp_mb(); | |
2786 | return fs_info->closing; | |
2787 | } | |
6c41761f DS |
2788 | static inline void free_fs_info(struct btrfs_fs_info *fs_info) |
2789 | { | |
837d5b6e | 2790 | kfree(fs_info->balance_ctl); |
6c41761f DS |
2791 | kfree(fs_info->delayed_root); |
2792 | kfree(fs_info->extent_root); | |
2793 | kfree(fs_info->tree_root); | |
2794 | kfree(fs_info->chunk_root); | |
2795 | kfree(fs_info->dev_root); | |
2796 | kfree(fs_info->csum_root); | |
2797 | kfree(fs_info->super_copy); | |
2798 | kfree(fs_info->super_for_commit); | |
2799 | kfree(fs_info); | |
2800 | } | |
7841cb28 | 2801 | |
dee26a9f | 2802 | /* root-item.c */ |
ea9e8b11 | 2803 | int btrfs_find_root_ref(struct btrfs_root *tree_root, |
4df27c4d YZ |
2804 | struct btrfs_path *path, |
2805 | u64 root_id, u64 ref_id); | |
0660b5af CM |
2806 | int btrfs_add_root_ref(struct btrfs_trans_handle *trans, |
2807 | struct btrfs_root *tree_root, | |
4df27c4d YZ |
2808 | u64 root_id, u64 ref_id, u64 dirid, u64 sequence, |
2809 | const char *name, int name_len); | |
2810 | int btrfs_del_root_ref(struct btrfs_trans_handle *trans, | |
2811 | struct btrfs_root *tree_root, | |
2812 | u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, | |
0660b5af | 2813 | const char *name, int name_len); |
e089f05c CM |
2814 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
2815 | struct btrfs_key *key); | |
2816 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
2817 | *root, struct btrfs_key *key, struct btrfs_root_item | |
2818 | *item); | |
b45a9d8b JM |
2819 | int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, |
2820 | struct btrfs_root *root, | |
2821 | struct btrfs_key *key, | |
2822 | struct btrfs_root_item *item); | |
e089f05c CM |
2823 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct |
2824 | btrfs_root_item *item, struct btrfs_key *key); | |
5d4f98a2 | 2825 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid); |
76dda93c | 2826 | int btrfs_find_orphan_roots(struct btrfs_root *tree_root); |
bf5f32ec MF |
2827 | void btrfs_set_root_node(struct btrfs_root_item *item, |
2828 | struct extent_buffer *node); | |
08fe4db1 LZ |
2829 | void btrfs_check_and_init_root_item(struct btrfs_root_item *item); |
2830 | ||
dee26a9f | 2831 | /* dir-item.c */ |
d397712b CM |
2832 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, |
2833 | struct btrfs_root *root, const char *name, | |
16cdcec7 | 2834 | int name_len, struct inode *dir, |
aec7477b | 2835 | struct btrfs_key *location, u8 type, u64 index); |
7e38180e CM |
2836 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
2837 | struct btrfs_root *root, | |
2838 | struct btrfs_path *path, u64 dir, | |
2839 | const char *name, int name_len, | |
2840 | int mod); | |
2841 | struct btrfs_dir_item * | |
2842 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | |
2843 | struct btrfs_root *root, | |
2844 | struct btrfs_path *path, u64 dir, | |
2845 | u64 objectid, const char *name, int name_len, | |
2846 | int mod); | |
4df27c4d YZ |
2847 | struct btrfs_dir_item * |
2848 | btrfs_search_dir_index_item(struct btrfs_root *root, | |
2849 | struct btrfs_path *path, u64 dirid, | |
2850 | const char *name, int name_len); | |
7e38180e CM |
2851 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, |
2852 | struct btrfs_path *path, | |
7f5c1516 | 2853 | const char *name, int name_len); |
7e38180e CM |
2854 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
2855 | struct btrfs_root *root, | |
2856 | struct btrfs_path *path, | |
2857 | struct btrfs_dir_item *di); | |
5103e947 | 2858 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
f34f57a3 YZ |
2859 | struct btrfs_root *root, |
2860 | struct btrfs_path *path, u64 objectid, | |
2861 | const char *name, u16 name_len, | |
2862 | const void *data, u16 data_len); | |
5103e947 JB |
2863 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, |
2864 | struct btrfs_root *root, | |
2865 | struct btrfs_path *path, u64 dir, | |
2866 | const char *name, u16 name_len, | |
2867 | int mod); | |
22a94d44 JB |
2868 | int verify_dir_item(struct btrfs_root *root, |
2869 | struct extent_buffer *leaf, | |
2870 | struct btrfs_dir_item *dir_item); | |
7b128766 JB |
2871 | |
2872 | /* orphan.c */ | |
2873 | int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, | |
2874 | struct btrfs_root *root, u64 offset); | |
2875 | int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, | |
2876 | struct btrfs_root *root, u64 offset); | |
4df27c4d | 2877 | int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); |
7b128766 | 2878 | |
dee26a9f | 2879 | /* inode-item.c */ |
3954401f CM |
2880 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
2881 | struct btrfs_root *root, | |
2882 | const char *name, int name_len, | |
aec7477b | 2883 | u64 inode_objectid, u64 ref_objectid, u64 index); |
3954401f CM |
2884 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, |
2885 | struct btrfs_root *root, | |
2886 | const char *name, int name_len, | |
aec7477b | 2887 | u64 inode_objectid, u64 ref_objectid, u64 *index); |
a22285a6 YZ |
2888 | struct btrfs_inode_ref * |
2889 | btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans, | |
2890 | struct btrfs_root *root, | |
2891 | struct btrfs_path *path, | |
2892 | const char *name, int name_len, | |
2893 | u64 inode_objectid, u64 ref_objectid, int mod); | |
5f39d397 CM |
2894 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
2895 | struct btrfs_root *root, | |
2896 | struct btrfs_path *path, u64 objectid); | |
293ffd5f | 2897 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
2898 | *root, struct btrfs_path *path, |
2899 | struct btrfs_key *location, int mod); | |
dee26a9f CM |
2900 | |
2901 | /* file-item.c */ | |
459931ec CM |
2902 | int btrfs_del_csums(struct btrfs_trans_handle *trans, |
2903 | struct btrfs_root *root, u64 bytenr, u64 len); | |
61b49440 | 2904 | int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, |
d20f7043 | 2905 | struct bio *bio, u32 *dst); |
4b46fce2 JB |
2906 | int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode, |
2907 | struct bio *bio, u64 logical_offset, u32 *dst); | |
b18c6685 | 2908 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
c8b97818 CM |
2909 | struct btrfs_root *root, |
2910 | u64 objectid, u64 pos, | |
2911 | u64 disk_offset, u64 disk_num_bytes, | |
2912 | u64 num_bytes, u64 offset, u64 ram_bytes, | |
2913 | u8 compression, u8 encryption, u16 other_encoding); | |
dee26a9f CM |
2914 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
2915 | struct btrfs_root *root, | |
2916 | struct btrfs_path *path, u64 objectid, | |
db94535d | 2917 | u64 bytenr, int mod); |
065631f6 | 2918 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
d20f7043 | 2919 | struct btrfs_root *root, |
e6dcd2dc | 2920 | struct btrfs_ordered_sum *sums); |
3edf7d33 | 2921 | int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, |
d20f7043 | 2922 | struct bio *bio, u64 file_start, int contig); |
b18c6685 CM |
2923 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
2924 | struct btrfs_root *root, | |
2925 | struct btrfs_path *path, | |
d20f7043 | 2926 | u64 bytenr, int cow); |
1de037a4 CM |
2927 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
2928 | struct btrfs_root *root, struct btrfs_path *path, | |
2929 | u64 isize); | |
a2de733c AJ |
2930 | int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, |
2931 | struct list_head *list, int search_commit); | |
39279cc3 | 2932 | /* inode.c */ |
b2675157 JB |
2933 | struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page, |
2934 | size_t pg_offset, u64 start, u64 len, | |
2935 | int create); | |
4881ee5a CM |
2936 | |
2937 | /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ | |
5036f538 | 2938 | #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) |
4881ee5a CM |
2939 | #define ClearPageChecked ClearPageFsMisc |
2940 | #define SetPageChecked SetPageFsMisc | |
2941 | #define PageChecked PageFsMisc | |
2942 | #endif | |
2943 | ||
b6973aa6 LZ |
2944 | /* This forces readahead on a given range of bytes in an inode */ |
2945 | static inline void btrfs_force_ra(struct address_space *mapping, | |
2946 | struct file_ra_state *ra, struct file *file, | |
2947 | pgoff_t offset, unsigned long req_size) | |
2948 | { | |
2949 | page_cache_sync_readahead(mapping, ra, file, offset, req_size); | |
2950 | } | |
2951 | ||
3de4586c CM |
2952 | struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); |
2953 | int btrfs_set_inode_index(struct inode *dir, u64 *index); | |
e02119d5 CM |
2954 | int btrfs_unlink_inode(struct btrfs_trans_handle *trans, |
2955 | struct btrfs_root *root, | |
2956 | struct inode *dir, struct inode *inode, | |
2957 | const char *name, int name_len); | |
2958 | int btrfs_add_link(struct btrfs_trans_handle *trans, | |
2959 | struct inode *parent_inode, struct inode *inode, | |
2960 | const char *name, int name_len, int add_backref, u64 index); | |
4df27c4d YZ |
2961 | int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, |
2962 | struct btrfs_root *root, | |
2963 | struct inode *dir, u64 objectid, | |
2964 | const char *name, int name_len); | |
e02119d5 CM |
2965 | int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, |
2966 | struct btrfs_root *root, | |
2967 | struct inode *inode, u64 new_size, | |
2968 | u32 min_type); | |
2969 | ||
24bbcf04 | 2970 | int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); |
2ac55d41 JB |
2971 | int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, |
2972 | struct extent_state **cached_state); | |
f421950f CM |
2973 | int btrfs_writepages(struct address_space *mapping, |
2974 | struct writeback_control *wbc); | |
d2fb3437 | 2975 | int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, |
d82a6f1d | 2976 | struct btrfs_root *new_root, u64 new_dirid); |
239b14b3 | 2977 | int btrfs_merge_bio_hook(struct page *page, unsigned long offset, |
c8b97818 | 2978 | size_t size, struct bio *bio, unsigned long bio_flags); |
239b14b3 | 2979 | |
c2ec175c | 2980 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); |
9ebefb18 | 2981 | int btrfs_readpage(struct file *file, struct page *page); |
bd555975 | 2982 | void btrfs_evict_inode(struct inode *inode); |
a9185b41 | 2983 | int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); |
22c44fe6 | 2984 | int btrfs_dirty_inode(struct inode *inode); |
39279cc3 CM |
2985 | struct inode *btrfs_alloc_inode(struct super_block *sb); |
2986 | void btrfs_destroy_inode(struct inode *inode); | |
45321ac5 | 2987 | int btrfs_drop_inode(struct inode *inode); |
39279cc3 CM |
2988 | int btrfs_init_cachep(void); |
2989 | void btrfs_destroy_cachep(void); | |
6bf13c0c | 2990 | long btrfs_ioctl_trans_end(struct file *file); |
1a54ef8c | 2991 | struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, |
73f73415 | 2992 | struct btrfs_root *root, int *was_new); |
a52d9a80 | 2993 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
306e16ce | 2994 | size_t pg_offset, u64 start, u64 end, |
a52d9a80 CM |
2995 | int create); |
2996 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
2997 | struct btrfs_root *root, | |
2998 | struct inode *inode); | |
5b21f2ed ZY |
2999 | int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode); |
3000 | int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode); | |
66b4ffd1 | 3001 | int btrfs_orphan_cleanup(struct btrfs_root *root); |
d68fc57b YZ |
3002 | void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, |
3003 | struct btrfs_root *root); | |
a41ad394 | 3004 | int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); |
143bede5 | 3005 | void btrfs_invalidate_inodes(struct btrfs_root *root); |
24bbcf04 YZ |
3006 | void btrfs_add_delayed_iput(struct inode *inode); |
3007 | void btrfs_run_delayed_iputs(struct btrfs_root *root); | |
efa56464 YZ |
3008 | int btrfs_prealloc_file_range(struct inode *inode, int mode, |
3009 | u64 start, u64 num_bytes, u64 min_size, | |
3010 | loff_t actual_len, u64 *alloc_hint); | |
0af3d00b JB |
3011 | int btrfs_prealloc_file_range_trans(struct inode *inode, |
3012 | struct btrfs_trans_handle *trans, int mode, | |
3013 | u64 start, u64 num_bytes, u64 min_size, | |
3014 | loff_t actual_len, u64 *alloc_hint); | |
82d339d9 | 3015 | extern const struct dentry_operations btrfs_dentry_operations; |
f46b5a66 CH |
3016 | |
3017 | /* ioctl.c */ | |
3018 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); | |
6cbff00f CH |
3019 | void btrfs_update_iflags(struct inode *inode); |
3020 | void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); | |
4cb5300b CM |
3021 | int btrfs_defrag_file(struct inode *inode, struct file *file, |
3022 | struct btrfs_ioctl_defrag_range_args *range, | |
3023 | u64 newer_than, unsigned long max_pages); | |
39279cc3 | 3024 | /* file.c */ |
4cb5300b CM |
3025 | int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, |
3026 | struct inode *inode); | |
3027 | int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); | |
02c24a82 | 3028 | int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); |
5b21f2ed ZY |
3029 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, |
3030 | int skip_pinned); | |
828c0950 | 3031 | extern const struct file_operations btrfs_file_operations; |
920bbbfb YZ |
3032 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode, |
3033 | u64 start, u64 end, u64 *hint_byte, int drop_cache); | |
d899e052 | 3034 | int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, |
d899e052 | 3035 | struct inode *inode, u64 start, u64 end); |
6bf13c0c | 3036 | int btrfs_release_file(struct inode *inode, struct file *file); |
be1a12a0 JB |
3037 | void btrfs_drop_pages(struct page **pages, size_t num_pages); |
3038 | int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode, | |
3039 | struct page **pages, size_t num_pages, | |
3040 | loff_t pos, size_t write_bytes, | |
3041 | struct extent_state **cached); | |
6bf13c0c | 3042 | |
6702ed49 CM |
3043 | /* tree-defrag.c */ |
3044 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | |
3045 | struct btrfs_root *root, int cache_only); | |
58176a96 JB |
3046 | |
3047 | /* sysfs.c */ | |
3048 | int btrfs_init_sysfs(void); | |
3049 | void btrfs_exit_sysfs(void); | |
58176a96 | 3050 | |
5103e947 JB |
3051 | /* xattr.c */ |
3052 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
6099afe8 | 3053 | |
edbd8d4e | 3054 | /* super.c */ |
edf24abe | 3055 | int btrfs_parse_options(struct btrfs_root *root, char *options); |
6bf13c0c | 3056 | int btrfs_sync_fs(struct super_block *sb, int wait); |
4da35113 | 3057 | void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...); |
acce952b | 3058 | void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function, |
4da35113 | 3059 | unsigned int line, int errno, const char *fmt, ...); |
acce952b | 3060 | |
49b25e05 JM |
3061 | void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, |
3062 | struct btrfs_root *root, const char *function, | |
3063 | unsigned int line, int errno); | |
3064 | ||
3065 | #define btrfs_abort_transaction(trans, root, errno) \ | |
3066 | do { \ | |
3067 | __btrfs_abort_transaction(trans, root, __func__, \ | |
3068 | __LINE__, errno); \ | |
3069 | } while (0) | |
acce952b | 3070 | |
3071 | #define btrfs_std_error(fs_info, errno) \ | |
3072 | do { \ | |
3073 | if ((errno)) \ | |
4da35113 JM |
3074 | __btrfs_std_error((fs_info), __func__, \ |
3075 | __LINE__, (errno), NULL); \ | |
3076 | } while (0) | |
3077 | ||
3078 | #define btrfs_error(fs_info, errno, fmt, args...) \ | |
3079 | do { \ | |
3080 | __btrfs_std_error((fs_info), __func__, __LINE__, \ | |
3081 | (errno), fmt, ##args); \ | |
acce952b | 3082 | } while (0) |
33268eaf | 3083 | |
8c342930 JM |
3084 | void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, |
3085 | unsigned int line, int errno, const char *fmt, ...); | |
3086 | ||
3087 | #define btrfs_panic(fs_info, errno, fmt, args...) \ | |
3088 | do { \ | |
3089 | struct btrfs_fs_info *_i = (fs_info); \ | |
3090 | __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \ | |
3091 | BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \ | |
acce952b | 3092 | } while (0) |
33268eaf JB |
3093 | |
3094 | /* acl.c */ | |
0eda294d | 3095 | #ifdef CONFIG_BTRFS_FS_POSIX_ACL |
4e34e719 | 3096 | struct posix_acl *btrfs_get_acl(struct inode *inode, int type); |
f34f57a3 YZ |
3097 | int btrfs_init_acl(struct btrfs_trans_handle *trans, |
3098 | struct inode *inode, struct inode *dir); | |
33268eaf | 3099 | int btrfs_acl_chmod(struct inode *inode); |
9b89d95a | 3100 | #else |
ed8f3737 | 3101 | #define btrfs_get_acl NULL |
9b89d95a LZ |
3102 | static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, |
3103 | struct inode *inode, struct inode *dir) | |
3104 | { | |
3105 | return 0; | |
3106 | } | |
3107 | static inline int btrfs_acl_chmod(struct inode *inode) | |
3108 | { | |
3109 | return 0; | |
3110 | } | |
3111 | #endif | |
0f9dd46c | 3112 | |
5d4f98a2 YZ |
3113 | /* relocation.c */ |
3114 | int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start); | |
3115 | int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, | |
3116 | struct btrfs_root *root); | |
3117 | int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, | |
3118 | struct btrfs_root *root); | |
3119 | int btrfs_recover_relocation(struct btrfs_root *root); | |
3120 | int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); | |
3fd0a558 YZ |
3121 | void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, |
3122 | struct btrfs_root *root, struct extent_buffer *buf, | |
3123 | struct extent_buffer *cow); | |
3124 | void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans, | |
3125 | struct btrfs_pending_snapshot *pending, | |
3126 | u64 *bytes_to_reserve); | |
49b25e05 | 3127 | int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, |
3fd0a558 | 3128 | struct btrfs_pending_snapshot *pending); |
a2de733c AJ |
3129 | |
3130 | /* scrub.c */ | |
3131 | int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end, | |
8628764e | 3132 | struct btrfs_scrub_progress *progress, int readonly); |
143bede5 JM |
3133 | void btrfs_scrub_pause(struct btrfs_root *root); |
3134 | void btrfs_scrub_pause_super(struct btrfs_root *root); | |
3135 | void btrfs_scrub_continue(struct btrfs_root *root); | |
3136 | void btrfs_scrub_continue_super(struct btrfs_root *root); | |
49b25e05 | 3137 | int __btrfs_scrub_cancel(struct btrfs_fs_info *info); |
a2de733c AJ |
3138 | int btrfs_scrub_cancel(struct btrfs_root *root); |
3139 | int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev); | |
3140 | int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid); | |
3141 | int btrfs_scrub_progress(struct btrfs_root *root, u64 devid, | |
3142 | struct btrfs_scrub_progress *progress); | |
3143 | ||
7414a03f AJ |
3144 | /* reada.c */ |
3145 | struct reada_control { | |
3146 | struct btrfs_root *root; /* tree to prefetch */ | |
3147 | struct btrfs_key key_start; | |
3148 | struct btrfs_key key_end; /* exclusive */ | |
3149 | atomic_t elems; | |
3150 | struct kref refcnt; | |
3151 | wait_queue_head_t wait; | |
3152 | }; | |
3153 | struct reada_control *btrfs_reada_add(struct btrfs_root *root, | |
3154 | struct btrfs_key *start, struct btrfs_key *end); | |
3155 | int btrfs_reada_wait(void *handle); | |
3156 | void btrfs_reada_detach(void *handle); | |
3157 | int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb, | |
3158 | u64 start, int err); | |
3159 | ||
64947ec0 JS |
3160 | /* delayed seq elem */ |
3161 | struct seq_list { | |
3162 | struct list_head list; | |
3163 | u64 seq; | |
3164 | u32 flags; | |
3165 | }; | |
3166 | ||
bd989ba3 JS |
3167 | void btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, |
3168 | struct seq_list *elem); | |
3169 | void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, | |
3170 | struct seq_list *elem); | |
3171 | ||
95a06077 JS |
3172 | static inline int is_fstree(u64 rootid) |
3173 | { | |
3174 | if (rootid == BTRFS_FS_TREE_OBJECTID || | |
3175 | (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID) | |
3176 | return 1; | |
3177 | return 0; | |
3178 | } | |
eb60ceac | 3179 | #endif |