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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 | |
6da6abae | 22 | #include <linux/version.h> |
810191ff CM |
23 | #include <linux/mm.h> |
24 | #include <linux/highmem.h> | |
e20d96d6 | 25 | #include <linux/fs.h> |
58176a96 | 26 | #include <linux/completion.h> |
04160088 | 27 | #include <linux/backing-dev.h> |
e6dcd2dc | 28 | #include <linux/wait.h> |
479965d6 | 29 | #include <asm/kmap_types.h> |
d1310b2e | 30 | #include "extent_io.h" |
5f39d397 | 31 | #include "extent_map.h" |
8b712842 | 32 | #include "async-thread.h" |
e20d96d6 | 33 | |
e089f05c | 34 | struct btrfs_trans_handle; |
79154b1b | 35 | struct btrfs_transaction; |
35b7e476 CM |
36 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
37 | extern struct kmem_cache *btrfs_transaction_cachep; | |
38 | extern struct kmem_cache *btrfs_bit_radix_cachep; | |
2c90e5d6 | 39 | extern struct kmem_cache *btrfs_path_cachep; |
e6dcd2dc | 40 | struct btrfs_ordered_sum; |
e089f05c | 41 | |
2a7108ad | 42 | #define BTRFS_MAGIC "_BHRfS_M" |
eb60ceac | 43 | |
33268eaf JB |
44 | #define BTRFS_ACL_NOT_CACHED ((void *)-1) |
45 | ||
4008c04a | 46 | #define BTRFS_MAX_LEVEL 8 |
0b86a832 | 47 | |
5d4f98a2 YZ |
48 | #define BTRFS_COMPAT_EXTENT_TREE_V0 |
49 | ||
5a3f23d5 CM |
50 | /* |
51 | * files bigger than this get some pre-flushing when they are added | |
52 | * to the ordered operations list. That way we limit the total | |
53 | * work done by the commit | |
54 | */ | |
55 | #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024) | |
56 | ||
0b86a832 | 57 | /* holds pointers to all of the tree roots */ |
6407bf6d | 58 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
0b86a832 CM |
59 | |
60 | /* stores information about which extents are in use, and reference counts */ | |
0cf6c620 | 61 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
0b86a832 | 62 | |
0b86a832 CM |
63 | /* |
64 | * chunk tree stores translations from logical -> physical block numbering | |
65 | * the super block points to the chunk tree | |
66 | */ | |
e085def2 | 67 | #define BTRFS_CHUNK_TREE_OBJECTID 3ULL |
0b86a832 CM |
68 | |
69 | /* | |
70 | * stores information about which areas of a given device are in use. | |
71 | * one per device. The tree of tree roots points to the device tree | |
72 | */ | |
e085def2 CM |
73 | #define BTRFS_DEV_TREE_OBJECTID 4ULL |
74 | ||
75 | /* one per subvolume, storing files and directories */ | |
76 | #define BTRFS_FS_TREE_OBJECTID 5ULL | |
77 | ||
78 | /* directory objectid inside the root tree */ | |
79 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL | |
0b86a832 | 80 | |
d20f7043 CM |
81 | /* holds checksums of all the data extents */ |
82 | #define BTRFS_CSUM_TREE_OBJECTID 7ULL | |
83 | ||
7b128766 JB |
84 | /* orhpan objectid for tracking unlinked/truncated files */ |
85 | #define BTRFS_ORPHAN_OBJECTID -5ULL | |
86 | ||
e02119d5 CM |
87 | /* does write ahead logging to speed up fsyncs */ |
88 | #define BTRFS_TREE_LOG_OBJECTID -6ULL | |
89 | #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL | |
90 | ||
e4657689 ZY |
91 | /* for space balancing */ |
92 | #define BTRFS_TREE_RELOC_OBJECTID -8ULL | |
93 | #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL | |
94 | ||
d20f7043 CM |
95 | /* |
96 | * extent checksums all have this objectid | |
97 | * this allows them to share the logging tree | |
98 | * for fsyncs | |
99 | */ | |
100 | #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL | |
101 | ||
31840ae1 ZY |
102 | /* dummy objectid represents multiple objectids */ |
103 | #define BTRFS_MULTIPLE_OBJECTIDS -255ULL | |
104 | ||
0b86a832 | 105 | /* |
6527cdbe | 106 | * All files have objectids in this range. |
0b86a832 | 107 | */ |
f6dbff55 | 108 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
6527cdbe | 109 | #define BTRFS_LAST_FREE_OBJECTID -256ULL |
e17cade2 | 110 | #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL |
3768f368 | 111 | |
0b86a832 CM |
112 | |
113 | /* | |
114 | * the device items go into the chunk tree. The key is in the form | |
115 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] | |
116 | */ | |
117 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL | |
118 | ||
e20d96d6 CM |
119 | /* |
120 | * we can actually store much bigger names, but lets not confuse the rest | |
121 | * of linux | |
122 | */ | |
123 | #define BTRFS_NAME_LEN 255 | |
124 | ||
f254e52c CM |
125 | /* 32 bytes in various csum fields */ |
126 | #define BTRFS_CSUM_SIZE 32 | |
607d432d JB |
127 | |
128 | /* csum types */ | |
129 | #define BTRFS_CSUM_TYPE_CRC32 0 | |
130 | ||
131 | static int btrfs_csum_sizes[] = { 4, 0 }; | |
132 | ||
509659cd | 133 | /* four bytes for CRC32 */ |
3954401f | 134 | #define BTRFS_EMPTY_DIR_SIZE 0 |
f254e52c | 135 | |
fabb5681 CM |
136 | #define BTRFS_FT_UNKNOWN 0 |
137 | #define BTRFS_FT_REG_FILE 1 | |
138 | #define BTRFS_FT_DIR 2 | |
139 | #define BTRFS_FT_CHRDEV 3 | |
140 | #define BTRFS_FT_BLKDEV 4 | |
141 | #define BTRFS_FT_FIFO 5 | |
142 | #define BTRFS_FT_SOCK 6 | |
143 | #define BTRFS_FT_SYMLINK 7 | |
5103e947 JB |
144 | #define BTRFS_FT_XATTR 8 |
145 | #define BTRFS_FT_MAX 9 | |
fabb5681 | 146 | |
fec577fb | 147 | /* |
d4a78947 WF |
148 | * The key defines the order in the tree, and so it also defines (optimal) |
149 | * block layout. | |
150 | * | |
151 | * objectid corresponds to the inode number. | |
152 | * | |
153 | * type tells us things about the object, and is a kind of stream selector. | |
154 | * so for a given inode, keys with type of 1 might refer to the inode data, | |
155 | * type of 2 may point to file data in the btree and type == 3 may point to | |
156 | * extents. | |
fec577fb CM |
157 | * |
158 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
159 | * |
160 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
161 | * in cpu native order. Otherwise they are identical and their sizes | |
162 | * should be the same (ie both packed) | |
fec577fb | 163 | */ |
e2fa7227 CM |
164 | struct btrfs_disk_key { |
165 | __le64 objectid; | |
5f39d397 | 166 | u8 type; |
70b2befd | 167 | __le64 offset; |
e2fa7227 CM |
168 | } __attribute__ ((__packed__)); |
169 | ||
170 | struct btrfs_key { | |
eb60ceac | 171 | u64 objectid; |
5f39d397 | 172 | u8 type; |
70b2befd | 173 | u64 offset; |
eb60ceac CM |
174 | } __attribute__ ((__packed__)); |
175 | ||
0b86a832 CM |
176 | struct btrfs_mapping_tree { |
177 | struct extent_map_tree map_tree; | |
178 | }; | |
179 | ||
e17cade2 | 180 | #define BTRFS_UUID_SIZE 16 |
0b86a832 CM |
181 | struct btrfs_dev_item { |
182 | /* the internal btrfs device id */ | |
183 | __le64 devid; | |
184 | ||
185 | /* size of the device */ | |
186 | __le64 total_bytes; | |
187 | ||
188 | /* bytes used */ | |
189 | __le64 bytes_used; | |
190 | ||
191 | /* optimal io alignment for this device */ | |
192 | __le32 io_align; | |
193 | ||
194 | /* optimal io width for this device */ | |
195 | __le32 io_width; | |
196 | ||
197 | /* minimal io size for this device */ | |
198 | __le32 sector_size; | |
199 | ||
0b86a832 CM |
200 | /* type and info about this device */ |
201 | __le64 type; | |
202 | ||
2b82032c YZ |
203 | /* expected generation for this device */ |
204 | __le64 generation; | |
205 | ||
c3027eb5 CM |
206 | /* |
207 | * starting byte of this partition on the device, | |
d4a78947 | 208 | * to allow for stripe alignment in the future |
c3027eb5 CM |
209 | */ |
210 | __le64 start_offset; | |
211 | ||
e17cade2 CM |
212 | /* grouping information for allocation decisions */ |
213 | __le32 dev_group; | |
214 | ||
215 | /* seek speed 0-100 where 100 is fastest */ | |
216 | u8 seek_speed; | |
217 | ||
218 | /* bandwidth 0-100 where 100 is fastest */ | |
219 | u8 bandwidth; | |
220 | ||
0d81ba5d | 221 | /* btrfs generated uuid for this device */ |
e17cade2 | 222 | u8 uuid[BTRFS_UUID_SIZE]; |
2b82032c YZ |
223 | |
224 | /* uuid of FS who owns this device */ | |
225 | u8 fsid[BTRFS_UUID_SIZE]; | |
0b86a832 CM |
226 | } __attribute__ ((__packed__)); |
227 | ||
228 | struct btrfs_stripe { | |
229 | __le64 devid; | |
230 | __le64 offset; | |
e17cade2 | 231 | u8 dev_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
232 | } __attribute__ ((__packed__)); |
233 | ||
234 | struct btrfs_chunk { | |
e17cade2 CM |
235 | /* size of this chunk in bytes */ |
236 | __le64 length; | |
237 | ||
238 | /* objectid of the root referencing this chunk */ | |
0b86a832 | 239 | __le64 owner; |
e17cade2 | 240 | |
0b86a832 CM |
241 | __le64 stripe_len; |
242 | __le64 type; | |
243 | ||
244 | /* optimal io alignment for this chunk */ | |
245 | __le32 io_align; | |
246 | ||
247 | /* optimal io width for this chunk */ | |
248 | __le32 io_width; | |
249 | ||
250 | /* minimal io size for this chunk */ | |
251 | __le32 sector_size; | |
252 | ||
253 | /* 2^16 stripes is quite a lot, a second limit is the size of a single | |
254 | * item in the btree | |
255 | */ | |
256 | __le16 num_stripes; | |
321aecc6 CM |
257 | |
258 | /* sub stripes only matter for raid10 */ | |
259 | __le16 sub_stripes; | |
0b86a832 CM |
260 | struct btrfs_stripe stripe; |
261 | /* additional stripes go here */ | |
262 | } __attribute__ ((__packed__)); | |
263 | ||
264 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) | |
265 | { | |
266 | BUG_ON(num_stripes == 0); | |
267 | return sizeof(struct btrfs_chunk) + | |
268 | sizeof(struct btrfs_stripe) * (num_stripes - 1); | |
269 | } | |
270 | ||
5f39d397 | 271 | #define BTRFS_FSID_SIZE 16 |
5d4f98a2 YZ |
272 | #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) |
273 | #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) | |
274 | #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32) | |
275 | #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33) | |
276 | ||
277 | #define BTRFS_BACKREF_REV_MAX 256 | |
278 | #define BTRFS_BACKREF_REV_SHIFT 56 | |
279 | #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ | |
280 | BTRFS_BACKREF_REV_SHIFT) | |
281 | ||
282 | #define BTRFS_OLD_BACKREF_REV 0 | |
283 | #define BTRFS_MIXED_BACKREF_REV 1 | |
63b10fc4 | 284 | |
fec577fb CM |
285 | /* |
286 | * every tree block (leaf or node) starts with this header. | |
287 | */ | |
bb492bb0 | 288 | struct btrfs_header { |
e17cade2 | 289 | /* these first four must match the super block */ |
f254e52c | 290 | u8 csum[BTRFS_CSUM_SIZE]; |
5f39d397 | 291 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 292 | __le64 bytenr; /* which block this node is supposed to live in */ |
63b10fc4 | 293 | __le64 flags; |
e17cade2 CM |
294 | |
295 | /* allowed to be different from the super from here on down */ | |
296 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; | |
7f5c1516 | 297 | __le64 generation; |
4d775673 | 298 | __le64 owner; |
5f39d397 | 299 | __le32 nritems; |
9a6f11ed | 300 | u8 level; |
eb60ceac CM |
301 | } __attribute__ ((__packed__)); |
302 | ||
5f39d397 | 303 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
d397712b CM |
304 | sizeof(struct btrfs_header)) / \ |
305 | sizeof(struct btrfs_key_ptr)) | |
123abc88 | 306 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
5f39d397 | 307 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
236454df CM |
308 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
309 | sizeof(struct btrfs_item) - \ | |
310 | sizeof(struct btrfs_file_extent_item)) | |
eb60ceac | 311 | |
0b86a832 CM |
312 | |
313 | /* | |
314 | * this is a very generous portion of the super block, giving us | |
315 | * room to translate 14 chunks with 3 stripes each. | |
316 | */ | |
317 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 | |
7ae9c09d | 318 | #define BTRFS_LABEL_SIZE 256 |
0b86a832 | 319 | |
fec577fb CM |
320 | /* |
321 | * the super block basically lists the main trees of the FS | |
322 | * it currently lacks any block count etc etc | |
323 | */ | |
234b63a0 | 324 | struct btrfs_super_block { |
f254e52c | 325 | u8 csum[BTRFS_CSUM_SIZE]; |
63b10fc4 | 326 | /* the first 4 fields must match struct btrfs_header */ |
2b82032c | 327 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 328 | __le64 bytenr; /* this block number */ |
63b10fc4 | 329 | __le64 flags; |
e17cade2 CM |
330 | |
331 | /* allowed to be different from the btrfs_header from here own down */ | |
3768f368 | 332 | __le64 magic; |
3768f368 CM |
333 | __le64 generation; |
334 | __le64 root; | |
0b86a832 | 335 | __le64 chunk_root; |
e02119d5 | 336 | __le64 log_root; |
c3027eb5 CM |
337 | |
338 | /* this will help find the new super based on the log root */ | |
339 | __le64 log_root_transid; | |
db94535d CM |
340 | __le64 total_bytes; |
341 | __le64 bytes_used; | |
2e635a27 | 342 | __le64 root_dir_objectid; |
8a4b83cc | 343 | __le64 num_devices; |
5f39d397 CM |
344 | __le32 sectorsize; |
345 | __le32 nodesize; | |
346 | __le32 leafsize; | |
87ee04eb | 347 | __le32 stripesize; |
0b86a832 | 348 | __le32 sys_chunk_array_size; |
84234f3a | 349 | __le64 chunk_root_generation; |
f2b636e8 JB |
350 | __le64 compat_flags; |
351 | __le64 compat_ro_flags; | |
352 | __le64 incompat_flags; | |
607d432d | 353 | __le16 csum_type; |
db94535d | 354 | u8 root_level; |
0b86a832 | 355 | u8 chunk_root_level; |
e02119d5 | 356 | u8 log_root_level; |
0d81ba5d | 357 | struct btrfs_dev_item dev_item; |
c3027eb5 | 358 | |
7ae9c09d | 359 | char label[BTRFS_LABEL_SIZE]; |
c3027eb5 CM |
360 | |
361 | /* future expansion */ | |
362 | __le64 reserved[32]; | |
0b86a832 | 363 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
cfaa7295 CM |
364 | } __attribute__ ((__packed__)); |
365 | ||
f2b636e8 JB |
366 | /* |
367 | * Compat flags that we support. If any incompat flags are set other than the | |
368 | * ones specified below then we will fail to mount | |
369 | */ | |
5d4f98a2 YZ |
370 | #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) |
371 | ||
372 | #define BTRFS_FEATURE_COMPAT_SUPP 0ULL | |
373 | #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL | |
374 | #define BTRFS_FEATURE_INCOMPAT_SUPP \ | |
375 | BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | |
f2b636e8 | 376 | |
fec577fb | 377 | /* |
62e2749e | 378 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
379 | * the item in the leaf (relative to the start of the data area) |
380 | */ | |
0783fcfc | 381 | struct btrfs_item { |
e2fa7227 | 382 | struct btrfs_disk_key key; |
123abc88 | 383 | __le32 offset; |
5f39d397 | 384 | __le32 size; |
eb60ceac CM |
385 | } __attribute__ ((__packed__)); |
386 | ||
fec577fb CM |
387 | /* |
388 | * leaves have an item area and a data area: | |
389 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
390 | * | |
391 | * The data is separate from the items to get the keys closer together | |
392 | * during searches. | |
393 | */ | |
234b63a0 | 394 | struct btrfs_leaf { |
bb492bb0 | 395 | struct btrfs_header header; |
123abc88 | 396 | struct btrfs_item items[]; |
eb60ceac CM |
397 | } __attribute__ ((__packed__)); |
398 | ||
fec577fb CM |
399 | /* |
400 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
401 | * other blocks | |
402 | */ | |
123abc88 CM |
403 | struct btrfs_key_ptr { |
404 | struct btrfs_disk_key key; | |
405 | __le64 blockptr; | |
74493f7a | 406 | __le64 generation; |
123abc88 CM |
407 | } __attribute__ ((__packed__)); |
408 | ||
234b63a0 | 409 | struct btrfs_node { |
bb492bb0 | 410 | struct btrfs_header header; |
123abc88 | 411 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
412 | } __attribute__ ((__packed__)); |
413 | ||
fec577fb | 414 | /* |
234b63a0 CM |
415 | * btrfs_paths remember the path taken from the root down to the leaf. |
416 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
417 | * to any other levels that are present. |
418 | * | |
419 | * The slots array records the index of the item or block pointer | |
420 | * used while walking the tree. | |
421 | */ | |
234b63a0 | 422 | struct btrfs_path { |
5f39d397 | 423 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
234b63a0 | 424 | int slots[BTRFS_MAX_LEVEL]; |
925baedd CM |
425 | /* if there is real range locking, this locks field will change */ |
426 | int locks[BTRFS_MAX_LEVEL]; | |
3c69faec | 427 | int reada; |
925baedd | 428 | /* keep some upper locks as we walk down */ |
6702ed49 | 429 | int lowest_level; |
459931ec CM |
430 | |
431 | /* | |
432 | * set by btrfs_split_item, tells search_slot to keep all locks | |
433 | * and to force calls to keep space in the nodes | |
434 | */ | |
b9473439 CM |
435 | unsigned int search_for_split:1; |
436 | unsigned int keep_locks:1; | |
437 | unsigned int skip_locking:1; | |
438 | unsigned int leave_spinning:1; | |
5d4f98a2 | 439 | unsigned int search_commit_root:1; |
eb60ceac | 440 | }; |
5de08d7d | 441 | |
62e2749e CM |
442 | /* |
443 | * items in the extent btree are used to record the objectid of the | |
444 | * owner of the block and the number of references | |
445 | */ | |
5d4f98a2 | 446 | |
62e2749e | 447 | struct btrfs_extent_item { |
5d4f98a2 YZ |
448 | __le64 refs; |
449 | __le64 generation; | |
450 | __le64 flags; | |
451 | } __attribute__ ((__packed__)); | |
452 | ||
453 | struct btrfs_extent_item_v0 { | |
62e2749e | 454 | __le32 refs; |
74493f7a CM |
455 | } __attribute__ ((__packed__)); |
456 | ||
5d4f98a2 YZ |
457 | #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \ |
458 | sizeof(struct btrfs_item)) | |
459 | ||
460 | #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0) | |
461 | #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1) | |
462 | ||
463 | /* following flags only apply to tree blocks */ | |
464 | ||
465 | /* use full backrefs for extent pointers in the block */ | |
466 | #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8) | |
467 | ||
468 | struct btrfs_tree_block_info { | |
469 | struct btrfs_disk_key key; | |
470 | u8 level; | |
471 | } __attribute__ ((__packed__)); | |
472 | ||
473 | struct btrfs_extent_data_ref { | |
474 | __le64 root; | |
475 | __le64 objectid; | |
476 | __le64 offset; | |
477 | __le32 count; | |
478 | } __attribute__ ((__packed__)); | |
479 | ||
480 | struct btrfs_shared_data_ref { | |
481 | __le32 count; | |
482 | } __attribute__ ((__packed__)); | |
483 | ||
484 | struct btrfs_extent_inline_ref { | |
485 | u8 type; | |
1bec1aed | 486 | __le64 offset; |
5d4f98a2 YZ |
487 | } __attribute__ ((__packed__)); |
488 | ||
489 | /* old style backrefs item */ | |
490 | struct btrfs_extent_ref_v0 { | |
74493f7a CM |
491 | __le64 root; |
492 | __le64 generation; | |
493 | __le64 objectid; | |
5d4f98a2 | 494 | __le32 count; |
62e2749e CM |
495 | } __attribute__ ((__packed__)); |
496 | ||
5d4f98a2 | 497 | |
0b86a832 CM |
498 | /* dev extents record free space on individual devices. The owner |
499 | * field points back to the chunk allocation mapping tree that allocated | |
e17cade2 | 500 | * the extent. The chunk tree uuid field is a way to double check the owner |
0b86a832 CM |
501 | */ |
502 | struct btrfs_dev_extent { | |
e17cade2 CM |
503 | __le64 chunk_tree; |
504 | __le64 chunk_objectid; | |
505 | __le64 chunk_offset; | |
0b86a832 | 506 | __le64 length; |
e17cade2 | 507 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
508 | } __attribute__ ((__packed__)); |
509 | ||
3954401f | 510 | struct btrfs_inode_ref { |
aec7477b | 511 | __le64 index; |
3954401f CM |
512 | __le16 name_len; |
513 | /* name goes here */ | |
514 | } __attribute__ ((__packed__)); | |
515 | ||
0b86a832 | 516 | struct btrfs_timespec { |
f254e52c | 517 | __le64 sec; |
1e1d2701 CM |
518 | __le32 nsec; |
519 | } __attribute__ ((__packed__)); | |
520 | ||
95029d7d | 521 | enum btrfs_compression_type { |
c8b97818 CM |
522 | BTRFS_COMPRESS_NONE = 0, |
523 | BTRFS_COMPRESS_ZLIB = 1, | |
524 | BTRFS_COMPRESS_LAST = 2, | |
95029d7d | 525 | }; |
c8b97818 | 526 | |
1e1d2701 | 527 | struct btrfs_inode_item { |
e02119d5 | 528 | /* nfs style generation number */ |
1e1d2701 | 529 | __le64 generation; |
e02119d5 CM |
530 | /* transid that last touched this inode */ |
531 | __le64 transid; | |
1e1d2701 | 532 | __le64 size; |
a76a3cd4 | 533 | __le64 nbytes; |
31f3c99b | 534 | __le64 block_group; |
1e1d2701 CM |
535 | __le32 nlink; |
536 | __le32 uid; | |
537 | __le32 gid; | |
538 | __le32 mode; | |
0b86a832 | 539 | __le64 rdev; |
f2b636e8 | 540 | __le64 flags; |
c8b97818 | 541 | |
c3027eb5 CM |
542 | /* modification sequence number for NFS */ |
543 | __le64 sequence; | |
544 | ||
545 | /* | |
546 | * a little future expansion, for more than this we can | |
547 | * just grow the inode item and version it | |
548 | */ | |
549 | __le64 reserved[4]; | |
0b86a832 CM |
550 | struct btrfs_timespec atime; |
551 | struct btrfs_timespec ctime; | |
552 | struct btrfs_timespec mtime; | |
553 | struct btrfs_timespec otime; | |
1e1d2701 CM |
554 | } __attribute__ ((__packed__)); |
555 | ||
e02119d5 CM |
556 | struct btrfs_dir_log_item { |
557 | __le64 end; | |
558 | } __attribute__ ((__packed__)); | |
559 | ||
62e2749e | 560 | struct btrfs_dir_item { |
d6e4a428 | 561 | struct btrfs_disk_key location; |
e02119d5 | 562 | __le64 transid; |
5103e947 | 563 | __le16 data_len; |
a8a2ee0c | 564 | __le16 name_len; |
62e2749e CM |
565 | u8 type; |
566 | } __attribute__ ((__packed__)); | |
567 | ||
568 | struct btrfs_root_item { | |
d6e4a428 | 569 | struct btrfs_inode_item inode; |
84234f3a | 570 | __le64 generation; |
d6e4a428 | 571 | __le64 root_dirid; |
db94535d CM |
572 | __le64 bytenr; |
573 | __le64 byte_limit; | |
574 | __le64 bytes_used; | |
80ff3856 | 575 | __le64 last_snapshot; |
f2b636e8 | 576 | __le64 flags; |
62e2749e | 577 | __le32 refs; |
5eda7b5e CM |
578 | struct btrfs_disk_key drop_progress; |
579 | u8 drop_level; | |
db94535d | 580 | u8 level; |
9f5fae2f | 581 | } __attribute__ ((__packed__)); |
62e2749e | 582 | |
0660b5af CM |
583 | /* |
584 | * this is used for both forward and backward root refs | |
585 | */ | |
586 | struct btrfs_root_ref { | |
587 | __le64 dirid; | |
588 | __le64 sequence; | |
589 | __le16 name_len; | |
590 | } __attribute__ ((__packed__)); | |
591 | ||
d899e052 YZ |
592 | #define BTRFS_FILE_EXTENT_INLINE 0 |
593 | #define BTRFS_FILE_EXTENT_REG 1 | |
594 | #define BTRFS_FILE_EXTENT_PREALLOC 2 | |
236454df | 595 | |
9f5fae2f | 596 | struct btrfs_file_extent_item { |
c8b97818 CM |
597 | /* |
598 | * transaction id that created this extent | |
599 | */ | |
71951f35 | 600 | __le64 generation; |
c8b97818 CM |
601 | /* |
602 | * max number of bytes to hold this extent in ram | |
603 | * when we split a compressed extent we can't know how big | |
604 | * each of the resulting pieces will be. So, this is | |
605 | * an upper limit on the size of the extent in ram instead of | |
606 | * an exact limit. | |
607 | */ | |
608 | __le64 ram_bytes; | |
609 | ||
610 | /* | |
611 | * 32 bits for the various ways we might encode the data, | |
612 | * including compression and encryption. If any of these | |
613 | * are set to something a given disk format doesn't understand | |
614 | * it is treated like an incompat flag for reading and writing, | |
615 | * but not for stat. | |
616 | */ | |
617 | u8 compression; | |
618 | u8 encryption; | |
619 | __le16 other_encoding; /* spare for later use */ | |
620 | ||
621 | /* are we inline data or a real extent? */ | |
236454df | 622 | u8 type; |
c8b97818 | 623 | |
9f5fae2f CM |
624 | /* |
625 | * disk space consumed by the extent, checksum blocks are included | |
626 | * in these numbers | |
627 | */ | |
db94535d CM |
628 | __le64 disk_bytenr; |
629 | __le64 disk_num_bytes; | |
9f5fae2f | 630 | /* |
dee26a9f | 631 | * the logical offset in file blocks (no csums) |
9f5fae2f CM |
632 | * this extent record is for. This allows a file extent to point |
633 | * into the middle of an existing extent on disk, sharing it | |
634 | * between two snapshots (useful if some bytes in the middle of the | |
635 | * extent have changed | |
636 | */ | |
637 | __le64 offset; | |
638 | /* | |
c8b97818 CM |
639 | * the logical number of file blocks (no csums included). This |
640 | * always reflects the size uncompressed and without encoding. | |
9f5fae2f | 641 | */ |
db94535d | 642 | __le64 num_bytes; |
c8b97818 | 643 | |
9f5fae2f CM |
644 | } __attribute__ ((__packed__)); |
645 | ||
f254e52c | 646 | struct btrfs_csum_item { |
509659cd | 647 | u8 csum; |
f254e52c CM |
648 | } __attribute__ ((__packed__)); |
649 | ||
0b86a832 CM |
650 | /* different types of block groups (and chunks) */ |
651 | #define BTRFS_BLOCK_GROUP_DATA (1 << 0) | |
652 | #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1) | |
653 | #define BTRFS_BLOCK_GROUP_METADATA (1 << 2) | |
593060d7 | 654 | #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3) |
8790d502 | 655 | #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4) |
611f0e00 | 656 | #define BTRFS_BLOCK_GROUP_DUP (1 << 5) |
321aecc6 | 657 | #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6) |
1e2677e0 | 658 | |
9078a3e1 CM |
659 | struct btrfs_block_group_item { |
660 | __le64 used; | |
0b86a832 CM |
661 | __le64 chunk_objectid; |
662 | __le64 flags; | |
9078a3e1 CM |
663 | } __attribute__ ((__packed__)); |
664 | ||
6324fbf3 CM |
665 | struct btrfs_space_info { |
666 | u64 flags; | |
6a63209f JB |
667 | |
668 | u64 total_bytes; /* total bytes in the space */ | |
669 | u64 bytes_used; /* total bytes used on disk */ | |
670 | u64 bytes_pinned; /* total bytes pinned, will be freed when the | |
671 | transaction finishes */ | |
672 | u64 bytes_reserved; /* total bytes the allocator has reserved for | |
673 | current allocations */ | |
674 | u64 bytes_readonly; /* total bytes that are read only */ | |
675 | ||
676 | /* delalloc accounting */ | |
677 | u64 bytes_delalloc; /* number of bytes reserved for allocation, | |
678 | this space is not necessarily reserved yet | |
679 | by the allocator */ | |
680 | u64 bytes_may_use; /* number of bytes that may be used for | |
681 | delalloc */ | |
682 | ||
683 | int full; /* indicates that we cannot allocate any more | |
684 | chunks for this space */ | |
685 | int force_alloc; /* set if we need to force a chunk alloc for | |
686 | this space */ | |
687 | ||
6324fbf3 | 688 | struct list_head list; |
0f9dd46c JB |
689 | |
690 | /* for block groups in our same type */ | |
691 | struct list_head block_groups; | |
692 | spinlock_t lock; | |
80eb234a | 693 | struct rw_semaphore groups_sem; |
0f9dd46c JB |
694 | }; |
695 | ||
fa9c0d79 CM |
696 | /* |
697 | * free clusters are used to claim free space in relatively large chunks, | |
698 | * allowing us to do less seeky writes. They are used for all metadata | |
699 | * allocations and data allocations in ssd mode. | |
700 | */ | |
701 | struct btrfs_free_cluster { | |
702 | spinlock_t lock; | |
703 | spinlock_t refill_lock; | |
704 | struct rb_root root; | |
705 | ||
706 | /* largest extent in this cluster */ | |
707 | u64 max_size; | |
708 | ||
709 | /* first extent starting offset */ | |
710 | u64 window_start; | |
711 | ||
96303081 JB |
712 | /* if this cluster simply points at a bitmap in the block group */ |
713 | bool points_to_bitmap; | |
714 | ||
fa9c0d79 CM |
715 | struct btrfs_block_group_cache *block_group; |
716 | /* | |
717 | * when a cluster is allocated from a block group, we put the | |
718 | * cluster onto a list in the block group so that it can | |
719 | * be freed before the block group is freed. | |
720 | */ | |
721 | struct list_head block_group_list; | |
6324fbf3 CM |
722 | }; |
723 | ||
9078a3e1 CM |
724 | struct btrfs_block_group_cache { |
725 | struct btrfs_key key; | |
726 | struct btrfs_block_group_item item; | |
c286ac48 | 727 | spinlock_t lock; |
ea6a478e | 728 | struct mutex cache_mutex; |
324ae4df | 729 | u64 pinned; |
e8569813 | 730 | u64 reserved; |
0b86a832 | 731 | u64 flags; |
96303081 JB |
732 | u64 sectorsize; |
733 | int extents_thresh; | |
734 | int free_extents; | |
735 | int total_bitmaps; | |
0b86a832 | 736 | int cached; |
8f18cf13 | 737 | int ro; |
0f9dd46c JB |
738 | int dirty; |
739 | ||
740 | struct btrfs_space_info *space_info; | |
741 | ||
742 | /* free space cache stuff */ | |
6226cb0a | 743 | spinlock_t tree_lock; |
0f9dd46c JB |
744 | struct rb_root free_space_offset; |
745 | ||
746 | /* block group cache stuff */ | |
747 | struct rb_node cache_node; | |
748 | ||
749 | /* for block groups in the same raid type */ | |
750 | struct list_head list; | |
d2fb3437 YZ |
751 | |
752 | /* usage count */ | |
753 | atomic_t count; | |
fa9c0d79 CM |
754 | |
755 | /* List of struct btrfs_free_clusters for this block group. | |
756 | * Today it will only have one thing on it, but that may change | |
757 | */ | |
758 | struct list_head cluster_list; | |
9078a3e1 | 759 | }; |
0b86a832 | 760 | |
5d4f98a2 | 761 | struct reloc_control; |
0b86a832 | 762 | struct btrfs_device; |
8a4b83cc | 763 | struct btrfs_fs_devices; |
9f5fae2f | 764 | struct btrfs_fs_info { |
5f39d397 | 765 | u8 fsid[BTRFS_FSID_SIZE]; |
e17cade2 | 766 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
62e2749e CM |
767 | struct btrfs_root *extent_root; |
768 | struct btrfs_root *tree_root; | |
0b86a832 CM |
769 | struct btrfs_root *chunk_root; |
770 | struct btrfs_root *dev_root; | |
3de4586c | 771 | struct btrfs_root *fs_root; |
d20f7043 | 772 | struct btrfs_root *csum_root; |
e02119d5 CM |
773 | |
774 | /* the log root tree is a directory of all the other log roots */ | |
775 | struct btrfs_root *log_root_tree; | |
0f7d52f4 | 776 | struct radix_tree_root fs_roots_radix; |
1a5bc167 | 777 | |
0f9dd46c JB |
778 | /* block group cache stuff */ |
779 | spinlock_t block_group_cache_lock; | |
780 | struct rb_root block_group_cache_tree; | |
781 | ||
d1310b2e | 782 | struct extent_io_tree pinned_extents; |
1a5bc167 | 783 | |
0b86a832 CM |
784 | /* logical->physical extent mapping */ |
785 | struct btrfs_mapping_tree mapping_tree; | |
786 | ||
293ffd5f | 787 | u64 generation; |
15ee9bc7 | 788 | u64 last_trans_committed; |
12fcfd22 CM |
789 | |
790 | /* | |
791 | * this is updated to the current trans every time a full commit | |
792 | * is required instead of the faster short fsync log commits | |
793 | */ | |
794 | u64 last_trans_log_full_commit; | |
9ca9ee09 | 795 | u64 open_ioctl_trans; |
b6cda9bc | 796 | unsigned long mount_opt; |
c59f8951 | 797 | u64 max_extent; |
6f568d35 | 798 | u64 max_inline; |
8f662a76 | 799 | u64 alloc_start; |
79154b1b | 800 | struct btrfs_transaction *running_transaction; |
e6dcd2dc | 801 | wait_queue_head_t transaction_throttle; |
f9295749 | 802 | wait_queue_head_t transaction_wait; |
771ed689 | 803 | wait_queue_head_t async_submit_wait; |
e02119d5 | 804 | |
4b52dff6 | 805 | struct btrfs_super_block super_copy; |
a061fc8d | 806 | struct btrfs_super_block super_for_commit; |
0b86a832 | 807 | struct block_device *__bdev; |
e20d96d6 | 808 | struct super_block *sb; |
d98237b3 | 809 | struct inode *btree_inode; |
04160088 | 810 | struct backing_dev_info bdi; |
79154b1b | 811 | struct mutex trans_mutex; |
e02119d5 | 812 | struct mutex tree_log_mutex; |
a74a4b97 CM |
813 | struct mutex transaction_kthread_mutex; |
814 | struct mutex cleaner_mutex; | |
925baedd | 815 | struct mutex chunk_mutex; |
a2135011 | 816 | struct mutex drop_mutex; |
7d9eb12c | 817 | struct mutex volume_mutex; |
1a40e23b | 818 | struct mutex tree_reloc_mutex; |
c3e69d58 | 819 | |
5a3f23d5 CM |
820 | /* |
821 | * this protects the ordered operations list only while we are | |
822 | * processing all of the entries on it. This way we make | |
823 | * sure the commit code doesn't find the list temporarily empty | |
824 | * because another function happens to be doing non-waiting preflush | |
825 | * before jumping into the main commit. | |
826 | */ | |
827 | struct mutex ordered_operations_mutex; | |
828 | ||
8fd17795 | 829 | struct list_head trans_list; |
19c00ddc | 830 | struct list_head hashers; |
facda1e7 | 831 | struct list_head dead_roots; |
e02119d5 | 832 | |
cb03c743 | 833 | atomic_t nr_async_submits; |
8c8bee1d | 834 | atomic_t async_submit_draining; |
0986fe9e | 835 | atomic_t nr_async_bios; |
771ed689 | 836 | atomic_t async_delalloc_pages; |
ce9adaa5 | 837 | |
3eaa2885 CM |
838 | /* |
839 | * this is used by the balancing code to wait for all the pending | |
840 | * ordered extents | |
841 | */ | |
842 | spinlock_t ordered_extent_lock; | |
5a3f23d5 CM |
843 | |
844 | /* | |
845 | * all of the data=ordered extents pending writeback | |
846 | * these can span multiple transactions and basically include | |
847 | * every dirty data page that isn't from nodatacow | |
848 | */ | |
3eaa2885 | 849 | struct list_head ordered_extents; |
5a3f23d5 CM |
850 | |
851 | /* | |
852 | * all of the inodes that have delalloc bytes. It is possible for | |
853 | * this list to be empty even when there is still dirty data=ordered | |
854 | * extents waiting to finish IO. | |
855 | */ | |
ea8c2819 | 856 | struct list_head delalloc_inodes; |
3eaa2885 | 857 | |
5a3f23d5 CM |
858 | /* |
859 | * special rename and truncate targets that must be on disk before | |
860 | * we're allowed to commit. This is basically the ext3 style | |
861 | * data=ordered list. | |
862 | */ | |
863 | struct list_head ordered_operations; | |
864 | ||
8b712842 CM |
865 | /* |
866 | * there is a pool of worker threads for checksumming during writes | |
867 | * and a pool for checksumming after reads. This is because readers | |
868 | * can run with FS locks held, and the writers may be waiting for | |
869 | * those locks. We don't want ordering in the pending list to cause | |
870 | * deadlocks, and so the two are serviced separately. | |
1cc127b5 CM |
871 | * |
872 | * A third pool does submit_bio to avoid deadlocking with the other | |
873 | * two | |
8b712842 CM |
874 | */ |
875 | struct btrfs_workers workers; | |
771ed689 | 876 | struct btrfs_workers delalloc_workers; |
8b712842 | 877 | struct btrfs_workers endio_workers; |
d20f7043 | 878 | struct btrfs_workers endio_meta_workers; |
cad321ad | 879 | struct btrfs_workers endio_meta_write_workers; |
e6dcd2dc | 880 | struct btrfs_workers endio_write_workers; |
1cc127b5 | 881 | struct btrfs_workers submit_workers; |
247e743c CM |
882 | /* |
883 | * fixup workers take dirty pages that didn't properly go through | |
884 | * the cow mechanism and make them safe to write. It happens | |
885 | * for the sys_munmap function call path | |
886 | */ | |
887 | struct btrfs_workers fixup_workers; | |
a74a4b97 CM |
888 | struct task_struct *transaction_kthread; |
889 | struct task_struct *cleaner_kthread; | |
4543df7e | 890 | int thread_pool_size; |
8b712842 | 891 | |
58176a96 JB |
892 | struct kobject super_kobj; |
893 | struct completion kobj_unregister; | |
e66f709b | 894 | int do_barriers; |
facda1e7 | 895 | int closing; |
e02119d5 | 896 | int log_root_recovering; |
9f5fae2f | 897 | |
324ae4df | 898 | u64 total_pinned; |
b9473439 CM |
899 | |
900 | /* protected by the delalloc lock, used to keep from writing | |
901 | * metadata until there is a nice batch | |
902 | */ | |
903 | u64 dirty_metadata_bytes; | |
0b86a832 CM |
904 | struct list_head dirty_cowonly_roots; |
905 | ||
8a4b83cc | 906 | struct btrfs_fs_devices *fs_devices; |
4184ea7f CM |
907 | |
908 | /* | |
909 | * the space_info list is almost entirely read only. It only changes | |
910 | * when we add a new raid type to the FS, and that happens | |
911 | * very rarely. RCU is used to protect it. | |
912 | */ | |
6324fbf3 | 913 | struct list_head space_info; |
4184ea7f | 914 | |
5d4f98a2 YZ |
915 | struct reloc_control *reloc_ctl; |
916 | ||
1832a6d5 | 917 | spinlock_t delalloc_lock; |
cee36a03 | 918 | spinlock_t new_trans_lock; |
1832a6d5 | 919 | u64 delalloc_bytes; |
fa9c0d79 CM |
920 | |
921 | /* data_alloc_cluster is only used in ssd mode */ | |
922 | struct btrfs_free_cluster data_alloc_cluster; | |
923 | ||
924 | /* all metadata allocations go through this cluster */ | |
925 | struct btrfs_free_cluster meta_alloc_cluster; | |
d18a2c44 | 926 | |
31153d81 YZ |
927 | spinlock_t ref_cache_lock; |
928 | u64 total_ref_cache_size; | |
31153d81 | 929 | |
d18a2c44 CM |
930 | u64 avail_data_alloc_bits; |
931 | u64 avail_metadata_alloc_bits; | |
932 | u64 avail_system_alloc_bits; | |
933 | u64 data_alloc_profile; | |
934 | u64 metadata_alloc_profile; | |
935 | u64 system_alloc_profile; | |
788f20eb | 936 | |
97e728d4 JB |
937 | unsigned data_chunk_allocations; |
938 | unsigned metadata_ratio; | |
939 | ||
788f20eb | 940 | void *bdev_holder; |
324ae4df | 941 | }; |
0b86a832 | 942 | |
9f5fae2f CM |
943 | /* |
944 | * in ram representation of the tree. extent_root is used for all allocations | |
f2458e1d | 945 | * and for the extent tree extent_root root. |
9f5fae2f CM |
946 | */ |
947 | struct btrfs_root { | |
5f39d397 | 948 | struct extent_buffer *node; |
925baedd CM |
949 | |
950 | /* the node lock is held while changing the node pointer */ | |
951 | spinlock_t node_lock; | |
952 | ||
5f39d397 | 953 | struct extent_buffer *commit_root; |
e02119d5 | 954 | struct btrfs_root *log_root; |
1a40e23b | 955 | struct btrfs_root *reloc_root; |
31153d81 | 956 | |
62e2749e CM |
957 | struct btrfs_root_item root_item; |
958 | struct btrfs_key root_key; | |
9f5fae2f | 959 | struct btrfs_fs_info *fs_info; |
d0c803c4 CM |
960 | struct extent_io_tree dirty_log_pages; |
961 | ||
58176a96 JB |
962 | struct kobject root_kobj; |
963 | struct completion kobj_unregister; | |
a2135011 | 964 | struct mutex objectid_mutex; |
7237f183 | 965 | |
e02119d5 | 966 | struct mutex log_mutex; |
7237f183 YZ |
967 | wait_queue_head_t log_writer_wait; |
968 | wait_queue_head_t log_commit_wait[2]; | |
969 | atomic_t log_writers; | |
970 | atomic_t log_commit[2]; | |
971 | unsigned long log_transid; | |
972 | unsigned long log_batch; | |
ea8c2819 | 973 | |
0f7d52f4 CM |
974 | u64 objectid; |
975 | u64 last_trans; | |
5f39d397 CM |
976 | |
977 | /* data allocations are done in sectorsize units */ | |
978 | u32 sectorsize; | |
979 | ||
980 | /* node allocations are done in nodesize units */ | |
981 | u32 nodesize; | |
982 | ||
983 | /* leaf allocations are done in leafsize units */ | |
984 | u32 leafsize; | |
985 | ||
87ee04eb CM |
986 | u32 stripesize; |
987 | ||
9f5fae2f | 988 | u32 type; |
1b05da2e CM |
989 | u64 highest_inode; |
990 | u64 last_inode_alloc; | |
9f3a7427 | 991 | int ref_cows; |
0b86a832 | 992 | int track_dirty; |
3f157a2f | 993 | u64 defrag_trans_start; |
6702ed49 | 994 | struct btrfs_key defrag_progress; |
0ef3e66b | 995 | struct btrfs_key defrag_max; |
6702ed49 CM |
996 | int defrag_running; |
997 | int defrag_level; | |
58176a96 | 998 | char *name; |
4313b399 | 999 | int in_sysfs; |
0b86a832 CM |
1000 | |
1001 | /* the dirty list is only used by non-reference counted roots */ | |
1002 | struct list_head dirty_list; | |
7b128766 | 1003 | |
5d4f98a2 YZ |
1004 | struct list_head root_list; |
1005 | ||
bcc63abb | 1006 | spinlock_t list_lock; |
7b128766 | 1007 | struct list_head orphan_list; |
3394e160 | 1008 | |
5d4f98a2 YZ |
1009 | spinlock_t inode_lock; |
1010 | /* red-black tree that keeps track of in-memory inodes */ | |
1011 | struct rb_root inode_tree; | |
1012 | ||
3394e160 CM |
1013 | /* |
1014 | * right now this just gets used so that a root has its own devid | |
1015 | * for stat. It may be used for more later | |
1016 | */ | |
1017 | struct super_block anon_super; | |
62e2749e CM |
1018 | }; |
1019 | ||
1e1d2701 CM |
1020 | /* |
1021 | * inode items have the data typically returned from stat and store other | |
1022 | * info about object characteristics. There is one for every file and dir in | |
1023 | * the FS | |
1024 | */ | |
9078a3e1 | 1025 | #define BTRFS_INODE_ITEM_KEY 1 |
0660b5af CM |
1026 | #define BTRFS_INODE_REF_KEY 12 |
1027 | #define BTRFS_XATTR_ITEM_KEY 24 | |
1028 | #define BTRFS_ORPHAN_ITEM_KEY 48 | |
9078a3e1 | 1029 | /* reserve 2-15 close to the inode for later flexibility */ |
1e1d2701 CM |
1030 | |
1031 | /* | |
1032 | * dir items are the name -> inode pointers in a directory. There is one | |
1033 | * for every name in a directory. | |
1034 | */ | |
0660b5af CM |
1035 | #define BTRFS_DIR_LOG_ITEM_KEY 60 |
1036 | #define BTRFS_DIR_LOG_INDEX_KEY 72 | |
1037 | #define BTRFS_DIR_ITEM_KEY 84 | |
1038 | #define BTRFS_DIR_INDEX_KEY 96 | |
1e1d2701 | 1039 | /* |
9078a3e1 | 1040 | * extent data is for file data |
1e1d2701 | 1041 | */ |
0660b5af | 1042 | #define BTRFS_EXTENT_DATA_KEY 108 |
d20f7043 | 1043 | |
f254e52c | 1044 | /* |
d20f7043 CM |
1045 | * extent csums are stored in a separate tree and hold csums for |
1046 | * an entire extent on disk. | |
f254e52c | 1047 | */ |
d20f7043 | 1048 | #define BTRFS_EXTENT_CSUM_KEY 128 |
f254e52c | 1049 | |
1e1d2701 | 1050 | /* |
d4a78947 | 1051 | * root items point to tree roots. They are typically in the root |
1e1d2701 CM |
1052 | * tree used by the super block to find all the other trees |
1053 | */ | |
0660b5af CM |
1054 | #define BTRFS_ROOT_ITEM_KEY 132 |
1055 | ||
1056 | /* | |
1057 | * root backrefs tie subvols and snapshots to the directory entries that | |
1058 | * reference them | |
1059 | */ | |
1060 | #define BTRFS_ROOT_BACKREF_KEY 144 | |
1061 | ||
1062 | /* | |
1063 | * root refs make a fast index for listing all of the snapshots and | |
1064 | * subvolumes referenced by a given root. They point directly to the | |
1065 | * directory item in the root that references the subvol | |
1066 | */ | |
1067 | #define BTRFS_ROOT_REF_KEY 156 | |
1068 | ||
1e1d2701 CM |
1069 | /* |
1070 | * extent items are in the extent map tree. These record which blocks | |
1071 | * are used, and how many references there are to each block | |
1072 | */ | |
0660b5af | 1073 | #define BTRFS_EXTENT_ITEM_KEY 168 |
5d4f98a2 YZ |
1074 | |
1075 | #define BTRFS_TREE_BLOCK_REF_KEY 176 | |
1076 | ||
1077 | #define BTRFS_EXTENT_DATA_REF_KEY 178 | |
1078 | ||
1079 | #define BTRFS_EXTENT_REF_V0_KEY 180 | |
1080 | ||
1081 | #define BTRFS_SHARED_BLOCK_REF_KEY 182 | |
1082 | ||
1083 | #define BTRFS_SHARED_DATA_REF_KEY 184 | |
9078a3e1 CM |
1084 | |
1085 | /* | |
1086 | * block groups give us hints into the extent allocation trees. Which | |
1087 | * blocks are free etc etc | |
1088 | */ | |
0660b5af | 1089 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 192 |
9f5fae2f | 1090 | |
0660b5af CM |
1091 | #define BTRFS_DEV_EXTENT_KEY 204 |
1092 | #define BTRFS_DEV_ITEM_KEY 216 | |
1093 | #define BTRFS_CHUNK_ITEM_KEY 228 | |
0b86a832 | 1094 | |
1e1d2701 CM |
1095 | /* |
1096 | * string items are for debugging. They just store a short string of | |
1097 | * data in the FS | |
1098 | */ | |
9078a3e1 CM |
1099 | #define BTRFS_STRING_ITEM_KEY 253 |
1100 | ||
21ad10cf CM |
1101 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
1102 | #define BTRFS_MOUNT_NODATACOW (1 << 1) | |
1103 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) | |
e18e4809 | 1104 | #define BTRFS_MOUNT_SSD (1 << 3) |
dfe25020 | 1105 | #define BTRFS_MOUNT_DEGRADED (1 << 4) |
c8b97818 | 1106 | #define BTRFS_MOUNT_COMPRESS (1 << 5) |
3a5e1404 | 1107 | #define BTRFS_MOUNT_NOTREELOG (1 << 6) |
dccae999 | 1108 | #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) |
451d7585 | 1109 | #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) |
c289811c | 1110 | #define BTRFS_MOUNT_NOSSD (1 << 9) |
b6cda9bc CM |
1111 | |
1112 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) | |
1113 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) | |
1114 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ | |
1115 | BTRFS_MOUNT_##opt) | |
b98b6767 Y |
1116 | /* |
1117 | * Inode flags | |
1118 | */ | |
fdebe2bd Y |
1119 | #define BTRFS_INODE_NODATASUM (1 << 0) |
1120 | #define BTRFS_INODE_NODATACOW (1 << 1) | |
1121 | #define BTRFS_INODE_READONLY (1 << 2) | |
c8b97818 | 1122 | #define BTRFS_INODE_NOCOMPRESS (1 << 3) |
d899e052 | 1123 | #define BTRFS_INODE_PREALLOC (1 << 4) |
6cbff00f CH |
1124 | #define BTRFS_INODE_SYNC (1 << 5) |
1125 | #define BTRFS_INODE_IMMUTABLE (1 << 6) | |
1126 | #define BTRFS_INODE_APPEND (1 << 7) | |
1127 | #define BTRFS_INODE_NODUMP (1 << 8) | |
1128 | #define BTRFS_INODE_NOATIME (1 << 9) | |
1129 | #define BTRFS_INODE_DIRSYNC (1 << 10) | |
1130 | ||
1131 | ||
5f39d397 CM |
1132 | /* some macros to generate set/get funcs for the struct fields. This |
1133 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | |
1134 | * one for u8: | |
1135 | */ | |
1136 | #define le8_to_cpu(v) (v) | |
1137 | #define cpu_to_le8(v) (v) | |
1138 | #define __le8 u8 | |
1139 | ||
1140 | #define read_eb_member(eb, ptr, type, member, result) ( \ | |
1141 | read_extent_buffer(eb, (char *)(result), \ | |
1142 | ((unsigned long)(ptr)) + \ | |
1143 | offsetof(type, member), \ | |
1144 | sizeof(((type *)0)->member))) | |
1145 | ||
1146 | #define write_eb_member(eb, ptr, type, member, result) ( \ | |
1147 | write_extent_buffer(eb, (char *)(result), \ | |
1148 | ((unsigned long)(ptr)) + \ | |
1149 | offsetof(type, member), \ | |
1150 | sizeof(((type *)0)->member))) | |
1151 | ||
0f82731f | 1152 | #ifndef BTRFS_SETGET_FUNCS |
5f39d397 | 1153 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
0f82731f CM |
1154 | u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ |
1155 | void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); | |
1156 | #endif | |
5f39d397 CM |
1157 | |
1158 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | |
1159 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | |
1160 | { \ | |
df68b8a7 DM |
1161 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
1162 | u##bits res = le##bits##_to_cpu(p->member); \ | |
1163 | kunmap_atomic(p, KM_USER0); \ | |
810191ff | 1164 | return res; \ |
5f39d397 CM |
1165 | } \ |
1166 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
1167 | u##bits val) \ | |
1168 | { \ | |
df68b8a7 DM |
1169 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
1170 | p->member = cpu_to_le##bits(val); \ | |
1171 | kunmap_atomic(p, KM_USER0); \ | |
5f39d397 | 1172 | } |
9078a3e1 | 1173 | |
5f39d397 CM |
1174 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
1175 | static inline u##bits btrfs_##name(type *s) \ | |
1176 | { \ | |
1177 | return le##bits##_to_cpu(s->member); \ | |
1178 | } \ | |
1179 | static inline void btrfs_set_##name(type *s, u##bits val) \ | |
1180 | { \ | |
1181 | s->member = cpu_to_le##bits(val); \ | |
1e1d2701 CM |
1182 | } |
1183 | ||
0b86a832 CM |
1184 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
1185 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); | |
1186 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); | |
1187 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); | |
1188 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); | |
c3027eb5 CM |
1189 | BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, |
1190 | start_offset, 64); | |
0b86a832 CM |
1191 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); |
1192 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
1193 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); |
1194 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); | |
1195 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); | |
2b82032c | 1196 | BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); |
0b86a832 | 1197 | |
8a4b83cc CM |
1198 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
1199 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, | |
1200 | total_bytes, 64); | |
1201 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, | |
1202 | bytes_used, 64); | |
1203 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, | |
1204 | io_align, 32); | |
1205 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, | |
1206 | io_width, 32); | |
1207 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, | |
1208 | sector_size, 32); | |
1209 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
1210 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, |
1211 | dev_group, 32); | |
1212 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, | |
1213 | seek_speed, 8); | |
1214 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, | |
1215 | bandwidth, 8); | |
2b82032c YZ |
1216 | BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, |
1217 | generation, 64); | |
8a4b83cc | 1218 | |
0b86a832 CM |
1219 | static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) |
1220 | { | |
1221 | return (char *)d + offsetof(struct btrfs_dev_item, uuid); | |
1222 | } | |
1223 | ||
2b82032c YZ |
1224 | static inline char *btrfs_device_fsid(struct btrfs_dev_item *d) |
1225 | { | |
1226 | return (char *)d + offsetof(struct btrfs_dev_item, fsid); | |
1227 | } | |
1228 | ||
e17cade2 | 1229 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
0b86a832 CM |
1230 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
1231 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); | |
1232 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); | |
1233 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); | |
1234 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); | |
1235 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); | |
1236 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); | |
321aecc6 | 1237 | BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); |
0b86a832 CM |
1238 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
1239 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); | |
1240 | ||
e17cade2 CM |
1241 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
1242 | { | |
1243 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); | |
1244 | } | |
1245 | ||
1246 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); | |
0b86a832 CM |
1247 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
1248 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, | |
1249 | stripe_len, 64); | |
1250 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, | |
1251 | io_align, 32); | |
1252 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, | |
1253 | io_width, 32); | |
1254 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, | |
1255 | sector_size, 32); | |
1256 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); | |
1257 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, | |
1258 | num_stripes, 16); | |
321aecc6 CM |
1259 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, |
1260 | sub_stripes, 16); | |
0b86a832 CM |
1261 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
1262 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); | |
1263 | ||
1264 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, | |
1265 | int nr) | |
1266 | { | |
1267 | unsigned long offset = (unsigned long)c; | |
1268 | offset += offsetof(struct btrfs_chunk, stripe); | |
1269 | offset += nr * sizeof(struct btrfs_stripe); | |
1270 | return (struct btrfs_stripe *)offset; | |
1271 | } | |
1272 | ||
a443755f CM |
1273 | static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) |
1274 | { | |
1275 | return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); | |
1276 | } | |
1277 | ||
0b86a832 CM |
1278 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
1279 | struct btrfs_chunk *c, int nr) | |
1280 | { | |
1281 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); | |
1282 | } | |
1283 | ||
1284 | static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, | |
1285 | struct btrfs_chunk *c, int nr, | |
1286 | u64 val) | |
1287 | { | |
1288 | btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); | |
1289 | } | |
1290 | ||
1291 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, | |
1292 | struct btrfs_chunk *c, int nr) | |
1293 | { | |
1294 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); | |
1295 | } | |
1296 | ||
1297 | static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, | |
1298 | struct btrfs_chunk *c, int nr, | |
1299 | u64 val) | |
1300 | { | |
1301 | btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); | |
1302 | } | |
1303 | ||
5f39d397 CM |
1304 | /* struct btrfs_block_group_item */ |
1305 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | |
1306 | used, 64); | |
1307 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | |
1308 | used, 64); | |
0b86a832 CM |
1309 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
1310 | struct btrfs_block_group_item, chunk_objectid, 64); | |
e17cade2 CM |
1311 | |
1312 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, | |
0b86a832 CM |
1313 | struct btrfs_block_group_item, chunk_objectid, 64); |
1314 | BTRFS_SETGET_FUNCS(disk_block_group_flags, | |
1315 | struct btrfs_block_group_item, flags, 64); | |
1316 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, | |
1317 | struct btrfs_block_group_item, flags, 64); | |
1e1d2701 | 1318 | |
3954401f CM |
1319 | /* struct btrfs_inode_ref */ |
1320 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); | |
aec7477b | 1321 | BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); |
3954401f | 1322 | |
5f39d397 CM |
1323 | /* struct btrfs_inode_item */ |
1324 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | |
c3027eb5 | 1325 | BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); |
e02119d5 | 1326 | BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); |
5f39d397 | 1327 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); |
a76a3cd4 | 1328 | BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); |
5f39d397 CM |
1329 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); |
1330 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | |
1331 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | |
1332 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | |
1333 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | |
0b86a832 | 1334 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
f2b636e8 | 1335 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); |
1e1d2701 | 1336 | |
0b86a832 | 1337 | static inline struct btrfs_timespec * |
5f39d397 | 1338 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1339 | { |
5f39d397 CM |
1340 | unsigned long ptr = (unsigned long)inode_item; |
1341 | ptr += offsetof(struct btrfs_inode_item, atime); | |
0b86a832 | 1342 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1343 | } |
1344 | ||
0b86a832 | 1345 | static inline struct btrfs_timespec * |
5f39d397 | 1346 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1347 | { |
5f39d397 CM |
1348 | unsigned long ptr = (unsigned long)inode_item; |
1349 | ptr += offsetof(struct btrfs_inode_item, mtime); | |
0b86a832 | 1350 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1351 | } |
1352 | ||
0b86a832 | 1353 | static inline struct btrfs_timespec * |
5f39d397 | 1354 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1355 | { |
5f39d397 CM |
1356 | unsigned long ptr = (unsigned long)inode_item; |
1357 | ptr += offsetof(struct btrfs_inode_item, ctime); | |
0b86a832 | 1358 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1359 | } |
1360 | ||
0b86a832 | 1361 | static inline struct btrfs_timespec * |
5f39d397 | 1362 | btrfs_inode_otime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1363 | { |
5f39d397 CM |
1364 | unsigned long ptr = (unsigned long)inode_item; |
1365 | ptr += offsetof(struct btrfs_inode_item, otime); | |
0b86a832 | 1366 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1367 | } |
1368 | ||
0b86a832 CM |
1369 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
1370 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); | |
e20d96d6 | 1371 | |
0b86a832 | 1372 | /* struct btrfs_dev_extent */ |
e17cade2 CM |
1373 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
1374 | chunk_tree, 64); | |
1375 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, | |
1376 | chunk_objectid, 64); | |
1377 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, | |
1378 | chunk_offset, 64); | |
0b86a832 CM |
1379 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
1380 | ||
e17cade2 CM |
1381 | static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
1382 | { | |
1383 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); | |
1384 | return (u8 *)((unsigned long)dev + ptr); | |
1385 | } | |
1386 | ||
5d4f98a2 YZ |
1387 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); |
1388 | BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, | |
1389 | generation, 64); | |
1390 | BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); | |
74493f7a | 1391 | |
5d4f98a2 YZ |
1392 | BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); |
1393 | ||
1394 | ||
1395 | BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); | |
1396 | ||
1397 | static inline void btrfs_tree_block_key(struct extent_buffer *eb, | |
1398 | struct btrfs_tree_block_info *item, | |
1399 | struct btrfs_disk_key *key) | |
1400 | { | |
1401 | read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
1402 | } | |
1403 | ||
1404 | static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, | |
1405 | struct btrfs_tree_block_info *item, | |
1406 | struct btrfs_disk_key *key) | |
1407 | { | |
1408 | write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
1409 | } | |
e20d96d6 | 1410 | |
5d4f98a2 YZ |
1411 | BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, |
1412 | root, 64); | |
1413 | BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, | |
1414 | objectid, 64); | |
1415 | BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, | |
1416 | offset, 64); | |
1417 | BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, | |
1418 | count, 32); | |
1419 | ||
1420 | BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, | |
1421 | count, 32); | |
1422 | ||
1423 | BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, | |
1424 | type, 8); | |
1425 | BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, | |
1426 | offset, 64); | |
1427 | ||
1428 | static inline u32 btrfs_extent_inline_ref_size(int type) | |
1429 | { | |
1430 | if (type == BTRFS_TREE_BLOCK_REF_KEY || | |
1431 | type == BTRFS_SHARED_BLOCK_REF_KEY) | |
1432 | return sizeof(struct btrfs_extent_inline_ref); | |
1433 | if (type == BTRFS_SHARED_DATA_REF_KEY) | |
1434 | return sizeof(struct btrfs_shared_data_ref) + | |
1435 | sizeof(struct btrfs_extent_inline_ref); | |
1436 | if (type == BTRFS_EXTENT_DATA_REF_KEY) | |
1437 | return sizeof(struct btrfs_extent_data_ref) + | |
1438 | offsetof(struct btrfs_extent_inline_ref, offset); | |
1439 | BUG(); | |
1440 | return 0; | |
1441 | } | |
1442 | ||
1443 | BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); | |
1444 | BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, | |
1445 | generation, 64); | |
1446 | BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); | |
1447 | BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); | |
e20d96d6 | 1448 | |
5f39d397 CM |
1449 | /* struct btrfs_node */ |
1450 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | |
74493f7a | 1451 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
e20d96d6 | 1452 | |
5f39d397 | 1453 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
cf27e1ee | 1454 | { |
5f39d397 CM |
1455 | unsigned long ptr; |
1456 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1457 | sizeof(struct btrfs_key_ptr) * nr; | |
1458 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | |
cf27e1ee CM |
1459 | } |
1460 | ||
5f39d397 CM |
1461 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
1462 | int nr, u64 val) | |
cf27e1ee | 1463 | { |
5f39d397 CM |
1464 | unsigned long ptr; |
1465 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1466 | sizeof(struct btrfs_key_ptr) * nr; | |
1467 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | |
cf27e1ee CM |
1468 | } |
1469 | ||
74493f7a CM |
1470 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
1471 | { | |
1472 | unsigned long ptr; | |
1473 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1474 | sizeof(struct btrfs_key_ptr) * nr; | |
1475 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); | |
1476 | } | |
1477 | ||
1478 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, | |
1479 | int nr, u64 val) | |
1480 | { | |
1481 | unsigned long ptr; | |
1482 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1483 | sizeof(struct btrfs_key_ptr) * nr; | |
1484 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); | |
1485 | } | |
1486 | ||
810191ff | 1487 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
4d775673 | 1488 | { |
5f39d397 CM |
1489 | return offsetof(struct btrfs_node, ptrs) + |
1490 | sizeof(struct btrfs_key_ptr) * nr; | |
4d775673 CM |
1491 | } |
1492 | ||
e644d021 CM |
1493 | void btrfs_node_key(struct extent_buffer *eb, |
1494 | struct btrfs_disk_key *disk_key, int nr); | |
1495 | ||
5f39d397 CM |
1496 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
1497 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f8a0c | 1498 | { |
5f39d397 CM |
1499 | unsigned long ptr; |
1500 | ptr = btrfs_node_key_ptr_offset(nr); | |
1501 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
1502 | struct btrfs_key_ptr, key, disk_key); | |
1d4f8a0c CM |
1503 | } |
1504 | ||
5f39d397 CM |
1505 | /* struct btrfs_item */ |
1506 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | |
1507 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | |
4d775673 | 1508 | |
5f39d397 | 1509 | static inline unsigned long btrfs_item_nr_offset(int nr) |
1d4f8a0c | 1510 | { |
5f39d397 CM |
1511 | return offsetof(struct btrfs_leaf, items) + |
1512 | sizeof(struct btrfs_item) * nr; | |
1d4f8a0c CM |
1513 | } |
1514 | ||
5f39d397 CM |
1515 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
1516 | int nr) | |
0783fcfc | 1517 | { |
5f39d397 | 1518 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
0783fcfc CM |
1519 | } |
1520 | ||
5f39d397 CM |
1521 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
1522 | struct btrfs_item *item) | |
0783fcfc | 1523 | { |
5f39d397 | 1524 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
0783fcfc CM |
1525 | } |
1526 | ||
5f39d397 | 1527 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1528 | { |
5f39d397 | 1529 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1530 | } |
1531 | ||
5f39d397 | 1532 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1533 | { |
5f39d397 | 1534 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1535 | } |
1536 | ||
5f39d397 | 1537 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1538 | { |
5f39d397 | 1539 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1540 | } |
1541 | ||
5f39d397 CM |
1542 | static inline void btrfs_item_key(struct extent_buffer *eb, |
1543 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 1544 | { |
5f39d397 CM |
1545 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
1546 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
1547 | } |
1548 | ||
5f39d397 CM |
1549 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
1550 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 1551 | { |
5f39d397 CM |
1552 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
1553 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
1554 | } |
1555 | ||
e02119d5 CM |
1556 | BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); |
1557 | ||
0660b5af CM |
1558 | /* |
1559 | * struct btrfs_root_ref | |
1560 | */ | |
1561 | BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); | |
1562 | BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); | |
1563 | BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); | |
1564 | ||
5f39d397 | 1565 | /* struct btrfs_dir_item */ |
5103e947 | 1566 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
5f39d397 CM |
1567 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
1568 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | |
e02119d5 | 1569 | BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); |
1d4f6404 | 1570 | |
5f39d397 CM |
1571 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
1572 | struct btrfs_dir_item *item, | |
1573 | struct btrfs_disk_key *key) | |
1d4f6404 | 1574 | { |
5f39d397 | 1575 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
1d4f6404 CM |
1576 | } |
1577 | ||
5f39d397 CM |
1578 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
1579 | struct btrfs_dir_item *item, | |
1580 | struct btrfs_disk_key *key) | |
a8a2ee0c | 1581 | { |
5f39d397 | 1582 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
a8a2ee0c CM |
1583 | } |
1584 | ||
5f39d397 CM |
1585 | /* struct btrfs_disk_key */ |
1586 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | |
1587 | objectid, 64); | |
1588 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | |
1589 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | |
1d4f6404 | 1590 | |
e2fa7227 CM |
1591 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
1592 | struct btrfs_disk_key *disk) | |
1593 | { | |
1594 | cpu->offset = le64_to_cpu(disk->offset); | |
5f39d397 | 1595 | cpu->type = disk->type; |
e2fa7227 CM |
1596 | cpu->objectid = le64_to_cpu(disk->objectid); |
1597 | } | |
1598 | ||
1599 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
1600 | struct btrfs_key *cpu) | |
1601 | { | |
1602 | disk->offset = cpu_to_le64(cpu->offset); | |
5f39d397 | 1603 | disk->type = cpu->type; |
e2fa7227 CM |
1604 | disk->objectid = cpu_to_le64(cpu->objectid); |
1605 | } | |
1606 | ||
5f39d397 CM |
1607 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
1608 | struct btrfs_key *key, int nr) | |
7f5c1516 | 1609 | { |
5f39d397 CM |
1610 | struct btrfs_disk_key disk_key; |
1611 | btrfs_node_key(eb, &disk_key, nr); | |
1612 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
1613 | } |
1614 | ||
5f39d397 CM |
1615 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
1616 | struct btrfs_key *key, int nr) | |
7f5c1516 | 1617 | { |
5f39d397 CM |
1618 | struct btrfs_disk_key disk_key; |
1619 | btrfs_item_key(eb, &disk_key, nr); | |
1620 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
1621 | } |
1622 | ||
5f39d397 CM |
1623 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
1624 | struct btrfs_dir_item *item, | |
1625 | struct btrfs_key *key) | |
4d775673 | 1626 | { |
5f39d397 CM |
1627 | struct btrfs_disk_key disk_key; |
1628 | btrfs_dir_item_key(eb, item, &disk_key); | |
1629 | btrfs_disk_key_to_cpu(key, &disk_key); | |
4d775673 CM |
1630 | } |
1631 | ||
58176a96 | 1632 | |
5f39d397 | 1633 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
3768f368 | 1634 | { |
5f39d397 | 1635 | return key->type; |
3768f368 CM |
1636 | } |
1637 | ||
5f39d397 | 1638 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
3768f368 | 1639 | { |
5f39d397 | 1640 | key->type = val; |
3768f368 CM |
1641 | } |
1642 | ||
5f39d397 | 1643 | /* struct btrfs_header */ |
db94535d | 1644 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
5f39d397 CM |
1645 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
1646 | generation, 64); | |
1647 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | |
1648 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | |
63b10fc4 | 1649 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
5f39d397 | 1650 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
0f7d52f4 | 1651 | |
63b10fc4 CM |
1652 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) |
1653 | { | |
1654 | return (btrfs_header_flags(eb) & flag) == flag; | |
1655 | } | |
1656 | ||
1657 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) | |
1658 | { | |
1659 | u64 flags = btrfs_header_flags(eb); | |
1660 | btrfs_set_header_flags(eb, flags | flag); | |
1661 | return (flags & flag) == flag; | |
1662 | } | |
1663 | ||
1664 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) | |
1665 | { | |
1666 | u64 flags = btrfs_header_flags(eb); | |
1667 | btrfs_set_header_flags(eb, flags & ~flag); | |
1668 | return (flags & flag) == flag; | |
1669 | } | |
1670 | ||
5d4f98a2 YZ |
1671 | static inline int btrfs_header_backref_rev(struct extent_buffer *eb) |
1672 | { | |
1673 | u64 flags = btrfs_header_flags(eb); | |
1674 | return flags >> BTRFS_BACKREF_REV_SHIFT; | |
1675 | } | |
1676 | ||
1677 | static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, | |
1678 | int rev) | |
1679 | { | |
1680 | u64 flags = btrfs_header_flags(eb); | |
1681 | flags &= ~BTRFS_BACKREF_REV_MASK; | |
1682 | flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; | |
1683 | btrfs_set_header_flags(eb, flags); | |
1684 | } | |
1685 | ||
5f39d397 | 1686 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
0f7d52f4 | 1687 | { |
5f39d397 CM |
1688 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
1689 | return (u8 *)ptr; | |
0f7d52f4 CM |
1690 | } |
1691 | ||
e17cade2 CM |
1692 | static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) |
1693 | { | |
1694 | unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid); | |
1695 | return (u8 *)ptr; | |
1696 | } | |
1697 | ||
5f39d397 | 1698 | static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) |
3768f368 | 1699 | { |
5f39d397 CM |
1700 | unsigned long ptr = offsetof(struct btrfs_super_block, fsid); |
1701 | return (u8 *)ptr; | |
3768f368 CM |
1702 | } |
1703 | ||
5f39d397 | 1704 | static inline u8 *btrfs_header_csum(struct extent_buffer *eb) |
3768f368 | 1705 | { |
5f39d397 CM |
1706 | unsigned long ptr = offsetof(struct btrfs_header, csum); |
1707 | return (u8 *)ptr; | |
3768f368 CM |
1708 | } |
1709 | ||
5f39d397 | 1710 | static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) |
3768f368 | 1711 | { |
5f39d397 | 1712 | return NULL; |
3768f368 CM |
1713 | } |
1714 | ||
5f39d397 | 1715 | static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) |
3768f368 | 1716 | { |
5f39d397 | 1717 | return NULL; |
3768f368 CM |
1718 | } |
1719 | ||
5f39d397 | 1720 | static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) |
3768f368 | 1721 | { |
5f39d397 | 1722 | return NULL; |
3768f368 CM |
1723 | } |
1724 | ||
5f39d397 | 1725 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
3768f368 | 1726 | { |
d397712b | 1727 | return btrfs_header_level(eb) == 0; |
3768f368 CM |
1728 | } |
1729 | ||
5f39d397 | 1730 | /* struct btrfs_root_item */ |
84234f3a YZ |
1731 | BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, |
1732 | generation, 64); | |
5f39d397 | 1733 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); |
db94535d CM |
1734 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
1735 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); | |
3768f368 | 1736 | |
84234f3a YZ |
1737 | BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, |
1738 | generation, 64); | |
db94535d CM |
1739 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
1740 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); | |
5f39d397 CM |
1741 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
1742 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | |
f2b636e8 | 1743 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); |
db94535d CM |
1744 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
1745 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); | |
80ff3856 YZ |
1746 | BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, |
1747 | last_snapshot, 64); | |
123abc88 | 1748 | |
5f39d397 | 1749 | /* struct btrfs_super_block */ |
607d432d | 1750 | |
db94535d | 1751 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
a061fc8d | 1752 | BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); |
5f39d397 CM |
1753 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
1754 | generation, 64); | |
1755 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | |
0b86a832 CM |
1756 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
1757 | struct btrfs_super_block, sys_chunk_array_size, 32); | |
84234f3a YZ |
1758 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, |
1759 | struct btrfs_super_block, chunk_root_generation, 64); | |
db94535d CM |
1760 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
1761 | root_level, 8); | |
0b86a832 CM |
1762 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
1763 | chunk_root, 64); | |
1764 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, | |
e02119d5 CM |
1765 | chunk_root_level, 8); |
1766 | BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, | |
1767 | log_root, 64); | |
c3027eb5 CM |
1768 | BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, |
1769 | log_root_transid, 64); | |
e02119d5 CM |
1770 | BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, |
1771 | log_root_level, 8); | |
db94535d CM |
1772 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
1773 | total_bytes, 64); | |
1774 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, | |
1775 | bytes_used, 64); | |
5f39d397 CM |
1776 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
1777 | sectorsize, 32); | |
1778 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | |
1779 | nodesize, 32); | |
1780 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, | |
1781 | leafsize, 32); | |
87ee04eb CM |
1782 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
1783 | stripesize, 32); | |
5f39d397 CM |
1784 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
1785 | root_dir_objectid, 64); | |
8a4b83cc CM |
1786 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
1787 | num_devices, 64); | |
f2b636e8 JB |
1788 | BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, |
1789 | compat_flags, 64); | |
1790 | BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, | |
1791 | compat_flags, 64); | |
1792 | BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, | |
1793 | incompat_flags, 64); | |
607d432d JB |
1794 | BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, |
1795 | csum_type, 16); | |
1796 | ||
1797 | static inline int btrfs_super_csum_size(struct btrfs_super_block *s) | |
1798 | { | |
1799 | int t = btrfs_super_csum_type(s); | |
1800 | BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes)); | |
1801 | return btrfs_csum_sizes[t]; | |
1802 | } | |
2e635a27 | 1803 | |
5f39d397 | 1804 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
2e635a27 | 1805 | { |
5f39d397 | 1806 | return offsetof(struct btrfs_leaf, items); |
2e635a27 CM |
1807 | } |
1808 | ||
5f39d397 CM |
1809 | /* struct btrfs_file_extent_item */ |
1810 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | |
9f5fae2f | 1811 | |
d397712b CM |
1812 | static inline unsigned long |
1813 | btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) | |
236454df | 1814 | { |
5f39d397 | 1815 | unsigned long offset = (unsigned long)e; |
db94535d | 1816 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 1817 | return offset; |
236454df CM |
1818 | } |
1819 | ||
1820 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
1821 | { | |
db94535d | 1822 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
9f5fae2f CM |
1823 | } |
1824 | ||
db94535d CM |
1825 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
1826 | disk_bytenr, 64); | |
5f39d397 CM |
1827 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
1828 | generation, 64); | |
db94535d CM |
1829 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
1830 | disk_num_bytes, 64); | |
5f39d397 CM |
1831 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
1832 | offset, 64); | |
db94535d CM |
1833 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
1834 | num_bytes, 64); | |
c8b97818 CM |
1835 | BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, |
1836 | ram_bytes, 64); | |
1837 | BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, | |
1838 | compression, 8); | |
1839 | BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, | |
1840 | encryption, 8); | |
1841 | BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, | |
1842 | other_encoding, 16); | |
1843 | ||
1844 | /* this returns the number of file bytes represented by the inline item. | |
1845 | * If an item is compressed, this is the uncompressed size | |
1846 | */ | |
1847 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, | |
1848 | struct btrfs_file_extent_item *e) | |
1849 | { | |
1850 | return btrfs_file_extent_ram_bytes(eb, e); | |
1851 | } | |
1852 | ||
1853 | /* | |
1854 | * this returns the number of bytes used by the item on disk, minus the | |
1855 | * size of any extent headers. If a file is compressed on disk, this is | |
1856 | * the compressed size | |
1857 | */ | |
1858 | static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, | |
1859 | struct btrfs_item *e) | |
1860 | { | |
1861 | unsigned long offset; | |
1862 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); | |
1863 | return btrfs_item_size(eb, e) - offset; | |
1864 | } | |
9f5fae2f | 1865 | |
e20d96d6 CM |
1866 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
1867 | { | |
1868 | return sb->s_fs_info; | |
1869 | } | |
1870 | ||
58176a96 JB |
1871 | static inline int btrfs_set_root_name(struct btrfs_root *root, |
1872 | const char *name, int len) | |
1873 | { | |
1874 | /* if we already have a name just free it */ | |
d397712b | 1875 | kfree(root->name); |
58176a96 JB |
1876 | |
1877 | root->name = kmalloc(len+1, GFP_KERNEL); | |
1878 | if (!root->name) | |
1879 | return -ENOMEM; | |
1880 | ||
1881 | memcpy(root->name, name, len); | |
d397712b | 1882 | root->name[len] = '\0'; |
58176a96 JB |
1883 | |
1884 | return 0; | |
1885 | } | |
1886 | ||
d397712b CM |
1887 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) |
1888 | { | |
db94535d CM |
1889 | if (level == 0) |
1890 | return root->leafsize; | |
1891 | return root->nodesize; | |
1892 | } | |
1893 | ||
4beb1b8b CM |
1894 | /* helper function to cast into the data area of the leaf. */ |
1895 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 | 1896 | ((type *)(btrfs_leaf_data(leaf) + \ |
5f39d397 CM |
1897 | btrfs_item_offset_nr(leaf, slot))) |
1898 | ||
1899 | #define btrfs_item_ptr_offset(leaf, slot) \ | |
1900 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | |
1901 | btrfs_item_offset_nr(leaf, slot))) | |
4beb1b8b | 1902 | |
2b1f55b0 CM |
1903 | static inline struct dentry *fdentry(struct file *file) |
1904 | { | |
6da6abae | 1905 | return file->f_path.dentry; |
6da6abae CM |
1906 | } |
1907 | ||
b18c6685 | 1908 | /* extent-tree.c */ |
fa9c0d79 | 1909 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
56bec294 CM |
1910 | int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, |
1911 | struct btrfs_root *root, unsigned long count); | |
31840ae1 | 1912 | int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len); |
e02119d5 CM |
1913 | int btrfs_update_pinned_extents(struct btrfs_root *root, |
1914 | u64 bytenr, u64 num, int pin); | |
1915 | int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans, | |
1916 | struct btrfs_root *root, struct extent_buffer *leaf); | |
80ff3856 | 1917 | int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, |
5d4f98a2 YZ |
1918 | struct btrfs_root *root, |
1919 | u64 objectid, u64 offset, u64 bytenr); | |
d1310b2e | 1920 | int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy); |
d397712b CM |
1921 | struct btrfs_block_group_cache *btrfs_lookup_block_group( |
1922 | struct btrfs_fs_info *info, | |
1923 | u64 bytenr); | |
5d4f98a2 | 1924 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
d2fb3437 YZ |
1925 | u64 btrfs_find_block_group(struct btrfs_root *root, |
1926 | u64 search_start, u64 search_hint, int owner); | |
5f39d397 | 1927 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
5d4f98a2 YZ |
1928 | struct btrfs_root *root, u32 blocksize, |
1929 | u64 parent, u64 root_objectid, | |
1930 | struct btrfs_disk_key *key, int level, | |
1931 | u64 hint, u64 empty_size); | |
65b51a00 CM |
1932 | struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans, |
1933 | struct btrfs_root *root, | |
4008c04a CM |
1934 | u64 bytenr, u32 blocksize, |
1935 | int level); | |
5d4f98a2 YZ |
1936 | int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, |
1937 | struct btrfs_root *root, | |
1938 | u64 root_objectid, u64 owner, | |
1939 | u64 offset, struct btrfs_key *ins); | |
1940 | int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, | |
1941 | struct btrfs_root *root, | |
1942 | u64 root_objectid, u64 owner, u64 offset, | |
1943 | struct btrfs_key *ins); | |
e6dcd2dc CM |
1944 | int btrfs_reserve_extent(struct btrfs_trans_handle *trans, |
1945 | struct btrfs_root *root, | |
1946 | u64 num_bytes, u64 min_alloc_size, | |
1947 | u64 empty_size, u64 hint_byte, | |
1948 | u64 search_end, struct btrfs_key *ins, | |
1949 | u64 data); | |
e089f05c | 1950 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
5d4f98a2 YZ |
1951 | struct extent_buffer *buf, int full_backref); |
1952 | int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, | |
1953 | struct extent_buffer *buf, int full_backref); | |
1954 | int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, | |
1955 | struct btrfs_root *root, | |
1956 | u64 bytenr, u64 num_bytes, u64 flags, | |
1957 | int is_data); | |
31840ae1 ZY |
1958 | int btrfs_free_extent(struct btrfs_trans_handle *trans, |
1959 | struct btrfs_root *root, | |
1960 | u64 bytenr, u64 num_bytes, u64 parent, | |
5d4f98a2 YZ |
1961 | u64 root_objectid, u64 owner, u64 offset); |
1962 | ||
65b51a00 | 1963 | int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len); |
ccd467d6 CM |
1964 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
1965 | struct btrfs_root *root, | |
d1310b2e | 1966 | struct extent_io_tree *unpin); |
b18c6685 | 1967 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
31840ae1 ZY |
1968 | struct btrfs_root *root, |
1969 | u64 bytenr, u64 num_bytes, u64 parent, | |
5d4f98a2 YZ |
1970 | u64 root_objectid, u64 owner, u64 offset); |
1971 | ||
9078a3e1 CM |
1972 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
1973 | struct btrfs_root *root); | |
d2fb3437 | 1974 | int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr); |
9078a3e1 CM |
1975 | int btrfs_free_block_groups(struct btrfs_fs_info *info); |
1976 | int btrfs_read_block_groups(struct btrfs_root *root); | |
0b86a832 CM |
1977 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
1978 | struct btrfs_root *root, u64 bytes_used, | |
e17cade2 | 1979 | u64 type, u64 chunk_objectid, u64 chunk_offset, |
0b86a832 | 1980 | u64 size); |
1a40e23b ZY |
1981 | int btrfs_remove_block_group(struct btrfs_trans_handle *trans, |
1982 | struct btrfs_root *root, u64 group_start); | |
5d4f98a2 YZ |
1983 | int btrfs_prepare_block_group_relocation(struct btrfs_root *root, |
1984 | struct btrfs_block_group_cache *group); | |
1985 | ||
2b82032c | 1986 | u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags); |
6a63209f | 1987 | void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde); |
4184ea7f CM |
1988 | void btrfs_clear_space_info_full(struct btrfs_fs_info *info); |
1989 | ||
6a63209f JB |
1990 | int btrfs_check_metadata_free_space(struct btrfs_root *root); |
1991 | int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode, | |
1992 | u64 bytes); | |
1993 | void btrfs_free_reserved_data_space(struct btrfs_root *root, | |
1994 | struct inode *inode, u64 bytes); | |
1995 | void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode, | |
1996 | u64 bytes); | |
1997 | void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode, | |
1998 | u64 bytes); | |
dee26a9f | 1999 | /* ctree.c */ |
5d4f98a2 YZ |
2000 | int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, |
2001 | int level, int *slot); | |
2002 | int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); | |
0b86a832 CM |
2003 | int btrfs_previous_item(struct btrfs_root *root, |
2004 | struct btrfs_path *path, u64 min_objectid, | |
2005 | int type); | |
31840ae1 ZY |
2006 | int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, |
2007 | struct btrfs_root *root, struct btrfs_path *path, | |
2008 | struct btrfs_key *new_key); | |
925baedd CM |
2009 | struct extent_buffer *btrfs_root_node(struct btrfs_root *root); |
2010 | struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); | |
e7a84565 | 2011 | int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, |
3f157a2f CM |
2012 | struct btrfs_key *key, int lowest_level, |
2013 | int cache_only, u64 min_trans); | |
2014 | int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, | |
e02119d5 | 2015 | struct btrfs_key *max_key, |
3f157a2f CM |
2016 | struct btrfs_path *path, int cache_only, |
2017 | u64 min_trans); | |
5f39d397 CM |
2018 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
2019 | struct btrfs_root *root, struct extent_buffer *buf, | |
2020 | struct extent_buffer *parent, int parent_slot, | |
9fa8cfe7 | 2021 | struct extent_buffer **cow_ret); |
be20aa9d CM |
2022 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
2023 | struct btrfs_root *root, | |
2024 | struct extent_buffer *buf, | |
2025 | struct extent_buffer **cow_ret, u64 new_root_objectid); | |
5d4f98a2 YZ |
2026 | int btrfs_block_can_be_shared(struct btrfs_root *root, |
2027 | struct extent_buffer *buf); | |
6567e837 CM |
2028 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
2029 | *root, struct btrfs_path *path, u32 data_size); | |
b18c6685 CM |
2030 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
2031 | struct btrfs_root *root, | |
2032 | struct btrfs_path *path, | |
179e29e4 | 2033 | u32 new_size, int from_end); |
459931ec CM |
2034 | int btrfs_split_item(struct btrfs_trans_handle *trans, |
2035 | struct btrfs_root *root, | |
2036 | struct btrfs_path *path, | |
2037 | struct btrfs_key *new_key, | |
2038 | unsigned long split_offset); | |
e089f05c CM |
2039 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
2040 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
2041 | ins_len, int cow); | |
6702ed49 | 2042 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
5f39d397 | 2043 | struct btrfs_root *root, struct extent_buffer *parent, |
a6b6e75e CM |
2044 | int start_slot, int cache_only, u64 *last_ret, |
2045 | struct btrfs_key *progress); | |
234b63a0 | 2046 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
2c90e5d6 CM |
2047 | struct btrfs_path *btrfs_alloc_path(void); |
2048 | void btrfs_free_path(struct btrfs_path *p); | |
b4ce94de | 2049 | void btrfs_set_path_blocking(struct btrfs_path *p); |
b4ce94de CM |
2050 | void btrfs_unlock_up_safe(struct btrfs_path *p, int level); |
2051 | ||
85e21bac CM |
2052 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
2053 | struct btrfs_path *path, int slot, int nr); | |
85e21bac CM |
2054 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, |
2055 | struct btrfs_root *root, | |
2056 | struct btrfs_path *path) | |
2057 | { | |
2058 | return btrfs_del_items(trans, root, path, path->slots[0], 1); | |
2059 | } | |
2060 | ||
e089f05c CM |
2061 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
2062 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
f3465ca4 JB |
2063 | int btrfs_insert_some_items(struct btrfs_trans_handle *trans, |
2064 | struct btrfs_root *root, | |
2065 | struct btrfs_path *path, | |
2066 | struct btrfs_key *cpu_key, u32 *data_size, | |
2067 | int nr); | |
9c58309d CM |
2068 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
2069 | struct btrfs_root *root, | |
2070 | struct btrfs_path *path, | |
2071 | struct btrfs_key *cpu_key, u32 *data_size, int nr); | |
2072 | ||
2073 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, | |
2074 | struct btrfs_root *root, | |
2075 | struct btrfs_path *path, | |
2076 | struct btrfs_key *key, | |
2077 | u32 data_size) | |
2078 | { | |
2079 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); | |
2080 | } | |
2081 | ||
234b63a0 | 2082 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
7bb86316 | 2083 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
5f39d397 | 2084 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
2c47e605 | 2085 | int btrfs_drop_snapshot(struct btrfs_root *root, int update_ref); |
f82d02d9 YZ |
2086 | int btrfs_drop_subtree(struct btrfs_trans_handle *trans, |
2087 | struct btrfs_root *root, | |
2088 | struct extent_buffer *node, | |
2089 | struct extent_buffer *parent); | |
dee26a9f | 2090 | /* root-item.c */ |
ea9e8b11 CM |
2091 | int btrfs_find_root_ref(struct btrfs_root *tree_root, |
2092 | struct btrfs_path *path, | |
2093 | u64 root_id, u64 ref_id); | |
0660b5af CM |
2094 | int btrfs_add_root_ref(struct btrfs_trans_handle *trans, |
2095 | struct btrfs_root *tree_root, | |
2096 | u64 root_id, u8 type, u64 ref_id, | |
2097 | u64 dirid, u64 sequence, | |
2098 | const char *name, int name_len); | |
e089f05c CM |
2099 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
2100 | struct btrfs_key *key); | |
2101 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
2102 | *root, struct btrfs_key *key, struct btrfs_root_item | |
2103 | *item); | |
2104 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
2105 | *root, struct btrfs_key *key, struct btrfs_root_item | |
2106 | *item); | |
2107 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct | |
2108 | btrfs_root_item *item, struct btrfs_key *key); | |
bf4ef679 CM |
2109 | int btrfs_search_root(struct btrfs_root *root, u64 search_start, |
2110 | u64 *found_objectid); | |
5d4f98a2 YZ |
2111 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid); |
2112 | int btrfs_set_root_node(struct btrfs_root_item *item, | |
2113 | struct extent_buffer *node); | |
dee26a9f | 2114 | /* dir-item.c */ |
d397712b CM |
2115 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, |
2116 | struct btrfs_root *root, const char *name, | |
2117 | int name_len, u64 dir, | |
aec7477b | 2118 | struct btrfs_key *location, u8 type, u64 index); |
7e38180e CM |
2119 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
2120 | struct btrfs_root *root, | |
2121 | struct btrfs_path *path, u64 dir, | |
2122 | const char *name, int name_len, | |
2123 | int mod); | |
2124 | struct btrfs_dir_item * | |
2125 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | |
2126 | struct btrfs_root *root, | |
2127 | struct btrfs_path *path, u64 dir, | |
2128 | u64 objectid, const char *name, int name_len, | |
2129 | int mod); | |
2130 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, | |
2131 | struct btrfs_path *path, | |
7f5c1516 | 2132 | const char *name, int name_len); |
7e38180e CM |
2133 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
2134 | struct btrfs_root *root, | |
2135 | struct btrfs_path *path, | |
2136 | struct btrfs_dir_item *di); | |
5103e947 JB |
2137 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
2138 | struct btrfs_root *root, const char *name, | |
2139 | u16 name_len, const void *data, u16 data_len, | |
2140 | u64 dir); | |
2141 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, | |
2142 | struct btrfs_root *root, | |
2143 | struct btrfs_path *path, u64 dir, | |
2144 | const char *name, u16 name_len, | |
2145 | int mod); | |
7b128766 JB |
2146 | |
2147 | /* orphan.c */ | |
2148 | int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, | |
2149 | struct btrfs_root *root, u64 offset); | |
2150 | int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, | |
2151 | struct btrfs_root *root, u64 offset); | |
2152 | ||
dee26a9f | 2153 | /* inode-map.c */ |
9f5fae2f CM |
2154 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
2155 | struct btrfs_root *fs_root, | |
2156 | u64 dirid, u64 *objectid); | |
5be6f7f1 CM |
2157 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
2158 | ||
dee26a9f | 2159 | /* inode-item.c */ |
3954401f CM |
2160 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
2161 | struct btrfs_root *root, | |
2162 | const char *name, int name_len, | |
aec7477b | 2163 | u64 inode_objectid, u64 ref_objectid, u64 index); |
3954401f CM |
2164 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, |
2165 | struct btrfs_root *root, | |
2166 | const char *name, int name_len, | |
aec7477b | 2167 | u64 inode_objectid, u64 ref_objectid, u64 *index); |
5f39d397 CM |
2168 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
2169 | struct btrfs_root *root, | |
2170 | struct btrfs_path *path, u64 objectid); | |
293ffd5f | 2171 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
2172 | *root, struct btrfs_path *path, |
2173 | struct btrfs_key *location, int mod); | |
dee26a9f CM |
2174 | |
2175 | /* file-item.c */ | |
459931ec CM |
2176 | int btrfs_del_csums(struct btrfs_trans_handle *trans, |
2177 | struct btrfs_root *root, u64 bytenr, u64 len); | |
61b49440 | 2178 | int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, |
d20f7043 | 2179 | struct bio *bio, u32 *dst); |
b18c6685 | 2180 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
c8b97818 CM |
2181 | struct btrfs_root *root, |
2182 | u64 objectid, u64 pos, | |
2183 | u64 disk_offset, u64 disk_num_bytes, | |
2184 | u64 num_bytes, u64 offset, u64 ram_bytes, | |
2185 | u8 compression, u8 encryption, u16 other_encoding); | |
dee26a9f CM |
2186 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
2187 | struct btrfs_root *root, | |
2188 | struct btrfs_path *path, u64 objectid, | |
db94535d | 2189 | u64 bytenr, int mod); |
065631f6 | 2190 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
d20f7043 | 2191 | struct btrfs_root *root, |
e6dcd2dc | 2192 | struct btrfs_ordered_sum *sums); |
3edf7d33 | 2193 | int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, |
d20f7043 | 2194 | struct bio *bio, u64 file_start, int contig); |
c8b97818 CM |
2195 | int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode, |
2196 | u64 start, unsigned long len); | |
b18c6685 CM |
2197 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
2198 | struct btrfs_root *root, | |
2199 | struct btrfs_path *path, | |
d20f7043 | 2200 | u64 bytenr, int cow); |
1de037a4 CM |
2201 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
2202 | struct btrfs_root *root, struct btrfs_path *path, | |
2203 | u64 isize); | |
17d217fe YZ |
2204 | int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, |
2205 | u64 end, struct list_head *list); | |
39279cc3 | 2206 | /* inode.c */ |
4881ee5a CM |
2207 | |
2208 | /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ | |
5036f538 | 2209 | #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) |
4881ee5a CM |
2210 | #define ClearPageChecked ClearPageFsMisc |
2211 | #define SetPageChecked SetPageFsMisc | |
2212 | #define PageChecked PageFsMisc | |
2213 | #endif | |
2214 | ||
3de4586c CM |
2215 | struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); |
2216 | int btrfs_set_inode_index(struct inode *dir, u64 *index); | |
e02119d5 CM |
2217 | int btrfs_unlink_inode(struct btrfs_trans_handle *trans, |
2218 | struct btrfs_root *root, | |
2219 | struct inode *dir, struct inode *inode, | |
2220 | const char *name, int name_len); | |
2221 | int btrfs_add_link(struct btrfs_trans_handle *trans, | |
2222 | struct inode *parent_inode, struct inode *inode, | |
2223 | const char *name, int name_len, int add_backref, u64 index); | |
2224 | int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, | |
2225 | struct btrfs_root *root, | |
2226 | struct inode *inode, u64 new_size, | |
2227 | u32 min_type); | |
2228 | ||
ea8c2819 CM |
2229 | int btrfs_start_delalloc_inodes(struct btrfs_root *root); |
2230 | int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end); | |
f421950f CM |
2231 | int btrfs_writepages(struct address_space *mapping, |
2232 | struct writeback_control *wbc); | |
d2fb3437 YZ |
2233 | int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, |
2234 | struct btrfs_root *new_root, struct dentry *dentry, | |
2235 | u64 new_dirid, u64 alloc_hint); | |
239b14b3 | 2236 | int btrfs_merge_bio_hook(struct page *page, unsigned long offset, |
c8b97818 | 2237 | size_t size, struct bio *bio, unsigned long bio_flags); |
239b14b3 | 2238 | |
edbd8d4e CM |
2239 | unsigned long btrfs_force_ra(struct address_space *mapping, |
2240 | struct file_ra_state *ra, struct file *file, | |
2241 | pgoff_t offset, pgoff_t last_index); | |
c2ec175c | 2242 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); |
9ebefb18 | 2243 | int btrfs_readpage(struct file *file, struct page *page); |
39279cc3 | 2244 | void btrfs_delete_inode(struct inode *inode); |
2da98f00 | 2245 | void btrfs_put_inode(struct inode *inode); |
39279cc3 CM |
2246 | int btrfs_write_inode(struct inode *inode, int wait); |
2247 | void btrfs_dirty_inode(struct inode *inode); | |
2248 | struct inode *btrfs_alloc_inode(struct super_block *sb); | |
2249 | void btrfs_destroy_inode(struct inode *inode); | |
2250 | int btrfs_init_cachep(void); | |
2251 | void btrfs_destroy_cachep(void); | |
6bf13c0c | 2252 | long btrfs_ioctl_trans_end(struct file *file); |
1a54ef8c | 2253 | struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, |
5d4f98a2 | 2254 | struct btrfs_root *root); |
39279cc3 CM |
2255 | int btrfs_commit_write(struct file *file, struct page *page, |
2256 | unsigned from, unsigned to); | |
a52d9a80 CM |
2257 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
2258 | size_t page_offset, u64 start, u64 end, | |
2259 | int create); | |
2260 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
2261 | struct btrfs_root *root, | |
2262 | struct inode *inode); | |
5b21f2ed ZY |
2263 | int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode); |
2264 | int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode); | |
2265 | void btrfs_orphan_cleanup(struct btrfs_root *root); | |
9036c102 | 2266 | int btrfs_cont_expand(struct inode *inode, loff_t size); |
f46b5a66 CH |
2267 | |
2268 | /* ioctl.c */ | |
2269 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); | |
6cbff00f CH |
2270 | void btrfs_update_iflags(struct inode *inode); |
2271 | void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); | |
f46b5a66 | 2272 | |
39279cc3 | 2273 | /* file.c */ |
e02119d5 | 2274 | int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync); |
5b21f2ed ZY |
2275 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, |
2276 | int skip_pinned); | |
5f56406a | 2277 | int btrfs_check_file(struct btrfs_root *root, struct inode *inode); |
39279cc3 CM |
2278 | extern struct file_operations btrfs_file_operations; |
2279 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, | |
2280 | struct btrfs_root *root, struct inode *inode, | |
e980b50c CM |
2281 | u64 start, u64 end, u64 locked_end, |
2282 | u64 inline_limit, u64 *hint_block); | |
d899e052 YZ |
2283 | int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, |
2284 | struct btrfs_root *root, | |
2285 | struct inode *inode, u64 start, u64 end); | |
6bf13c0c SW |
2286 | int btrfs_release_file(struct inode *inode, struct file *file); |
2287 | ||
6702ed49 CM |
2288 | /* tree-defrag.c */ |
2289 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | |
2290 | struct btrfs_root *root, int cache_only); | |
58176a96 JB |
2291 | |
2292 | /* sysfs.c */ | |
2293 | int btrfs_init_sysfs(void); | |
2294 | void btrfs_exit_sysfs(void); | |
2295 | int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); | |
2296 | int btrfs_sysfs_add_root(struct btrfs_root *root); | |
2297 | void btrfs_sysfs_del_root(struct btrfs_root *root); | |
2298 | void btrfs_sysfs_del_super(struct btrfs_fs_info *root); | |
2299 | ||
5103e947 JB |
2300 | /* xattr.c */ |
2301 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
6099afe8 | 2302 | |
edbd8d4e CM |
2303 | /* super.c */ |
2304 | u64 btrfs_parse_size(char *str); | |
edf24abe | 2305 | int btrfs_parse_options(struct btrfs_root *root, char *options); |
6bf13c0c | 2306 | int btrfs_sync_fs(struct super_block *sb, int wait); |
33268eaf JB |
2307 | |
2308 | /* acl.c */ | |
7df336ec | 2309 | #ifdef CONFIG_FS_POSIX_ACL |
33268eaf | 2310 | int btrfs_check_acl(struct inode *inode, int mask); |
7df336ec AV |
2311 | #else |
2312 | #define btrfs_check_acl NULL | |
2313 | #endif | |
33268eaf JB |
2314 | int btrfs_init_acl(struct inode *inode, struct inode *dir); |
2315 | int btrfs_acl_chmod(struct inode *inode); | |
0f9dd46c | 2316 | |
5d4f98a2 YZ |
2317 | /* relocation.c */ |
2318 | int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start); | |
2319 | int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, | |
2320 | struct btrfs_root *root); | |
2321 | int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, | |
2322 | struct btrfs_root *root); | |
2323 | int btrfs_recover_relocation(struct btrfs_root *root); | |
2324 | int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); | |
eb60ceac | 2325 | #endif |