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Commit | Line | Data |
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234b63a0 CM |
1 | #ifndef __BTRFS__ |
2 | #define __BTRFS__ | |
eb60ceac | 3 | |
ed2ff2cb | 4 | #include "list.h" |
e2fa7227 | 5 | #include "kerncompat.h" |
ed2ff2cb | 6 | |
3768f368 | 7 | #define BTRFS_MAGIC "_BtRfS_M" |
eb60ceac | 8 | |
3768f368 CM |
9 | #define BTRFS_ROOT_TREE_OBJECTID 1 |
10 | #define BTRFS_EXTENT_TREE_OBJECTID 2 | |
11 | #define BTRFS_FS_TREE_OBJECTID 3 | |
12 | ||
fec577fb CM |
13 | /* |
14 | * the key defines the order in the tree, and so it also defines (optimal) | |
15 | * block layout. objectid corresonds to the inode number. The flags | |
16 | * tells us things about the object, and is a kind of stream selector. | |
17 | * so for a given inode, keys with flags of 1 might refer to the inode | |
18 | * data, flags of 2 may point to file data in the btree and flags == 3 | |
19 | * may point to extents. | |
20 | * | |
21 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
22 | * |
23 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
24 | * in cpu native order. Otherwise they are identical and their sizes | |
25 | * should be the same (ie both packed) | |
fec577fb | 26 | */ |
e2fa7227 CM |
27 | struct btrfs_disk_key { |
28 | __le64 objectid; | |
e2fa7227 | 29 | __le64 offset; |
a1516c89 | 30 | __le32 flags; |
e2fa7227 CM |
31 | } __attribute__ ((__packed__)); |
32 | ||
33 | struct btrfs_key { | |
eb60ceac | 34 | u64 objectid; |
eb60ceac | 35 | u64 offset; |
a1516c89 | 36 | u32 flags; |
eb60ceac CM |
37 | } __attribute__ ((__packed__)); |
38 | ||
fec577fb CM |
39 | /* |
40 | * every tree block (leaf or node) starts with this header. | |
41 | */ | |
bb492bb0 | 42 | struct btrfs_header { |
3768f368 | 43 | u8 fsid[16]; /* FS specific uuid */ |
bb492bb0 CM |
44 | __le64 blocknr; /* which block this node is supposed to live in */ |
45 | __le64 parentid; /* objectid of the tree root */ | |
46 | __le32 csum; | |
47 | __le32 ham; | |
48 | __le16 nritems; | |
49 | __le16 flags; | |
fec577fb | 50 | /* generation flags to be added */ |
eb60ceac CM |
51 | } __attribute__ ((__packed__)); |
52 | ||
234b63a0 | 53 | #define BTRFS_MAX_LEVEL 8 |
123abc88 CM |
54 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \ |
55 | sizeof(struct btrfs_header)) / \ | |
56 | (sizeof(struct btrfs_disk_key) + sizeof(u64))) | |
57 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) | |
58 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize)) | |
eb60ceac | 59 | |
234b63a0 | 60 | struct btrfs_buffer; |
fec577fb CM |
61 | /* |
62 | * the super block basically lists the main trees of the FS | |
63 | * it currently lacks any block count etc etc | |
64 | */ | |
234b63a0 | 65 | struct btrfs_super_block { |
3768f368 CM |
66 | u8 fsid[16]; /* FS specific uuid */ |
67 | __le64 blocknr; /* this block number */ | |
68 | __le32 csum; | |
69 | __le64 magic; | |
123abc88 | 70 | __le32 blocksize; |
3768f368 CM |
71 | __le64 generation; |
72 | __le64 root; | |
73 | __le64 total_blocks; | |
74 | __le64 blocks_used; | |
cfaa7295 CM |
75 | } __attribute__ ((__packed__)); |
76 | ||
fec577fb | 77 | /* |
62e2749e | 78 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
79 | * the item in the leaf (relative to the start of the data area) |
80 | */ | |
0783fcfc | 81 | struct btrfs_item { |
e2fa7227 | 82 | struct btrfs_disk_key key; |
123abc88 | 83 | __le32 offset; |
0783fcfc | 84 | __le16 size; |
eb60ceac CM |
85 | } __attribute__ ((__packed__)); |
86 | ||
fec577fb CM |
87 | /* |
88 | * leaves have an item area and a data area: | |
89 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
90 | * | |
91 | * The data is separate from the items to get the keys closer together | |
92 | * during searches. | |
93 | */ | |
234b63a0 | 94 | struct btrfs_leaf { |
bb492bb0 | 95 | struct btrfs_header header; |
123abc88 | 96 | struct btrfs_item items[]; |
eb60ceac CM |
97 | } __attribute__ ((__packed__)); |
98 | ||
fec577fb CM |
99 | /* |
100 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
101 | * other blocks | |
102 | */ | |
123abc88 CM |
103 | struct btrfs_key_ptr { |
104 | struct btrfs_disk_key key; | |
105 | __le64 blockptr; | |
106 | } __attribute__ ((__packed__)); | |
107 | ||
234b63a0 | 108 | struct btrfs_node { |
bb492bb0 | 109 | struct btrfs_header header; |
123abc88 | 110 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
111 | } __attribute__ ((__packed__)); |
112 | ||
fec577fb | 113 | /* |
234b63a0 CM |
114 | * btrfs_paths remember the path taken from the root down to the leaf. |
115 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
116 | * to any other levels that are present. |
117 | * | |
118 | * The slots array records the index of the item or block pointer | |
119 | * used while walking the tree. | |
120 | */ | |
234b63a0 CM |
121 | struct btrfs_path { |
122 | struct btrfs_buffer *nodes[BTRFS_MAX_LEVEL]; | |
123 | int slots[BTRFS_MAX_LEVEL]; | |
eb60ceac | 124 | }; |
5de08d7d | 125 | |
62e2749e CM |
126 | /* |
127 | * items in the extent btree are used to record the objectid of the | |
128 | * owner of the block and the number of references | |
129 | */ | |
130 | struct btrfs_extent_item { | |
131 | __le32 refs; | |
132 | __le64 owner; | |
133 | } __attribute__ ((__packed__)); | |
134 | ||
135 | struct btrfs_dir_item { | |
136 | __le64 objectid; | |
137 | __le16 flags; | |
138 | u8 type; | |
139 | } __attribute__ ((__packed__)); | |
140 | ||
141 | struct btrfs_root_item { | |
142 | __le64 blocknr; | |
143 | __le32 flags; | |
144 | __le64 block_limit; | |
145 | __le64 blocks_used; | |
146 | __le32 refs; | |
147 | }; | |
148 | ||
149 | /* | |
150 | * in ram representation of the tree. extent_root is used for all allocations | |
151 | * and for the extent tree extent_root root. current_insert is used | |
152 | * only for the extent tree. | |
153 | */ | |
154 | struct btrfs_root { | |
155 | struct btrfs_buffer *node; | |
156 | struct btrfs_buffer *commit_root; | |
157 | struct btrfs_root *extent_root; | |
158 | struct btrfs_root *tree_root; | |
159 | struct btrfs_key current_insert; | |
160 | struct btrfs_key last_insert; | |
161 | int fp; | |
162 | struct radix_tree_root cache_radix; | |
163 | struct radix_tree_root pinned_radix; | |
164 | struct list_head trans; | |
165 | struct list_head cache; | |
166 | int cache_size; | |
167 | int ref_cows; | |
168 | struct btrfs_root_item root_item; | |
169 | struct btrfs_key root_key; | |
170 | u32 blocksize; | |
171 | }; | |
172 | ||
173 | ||
174 | /* the lower bits in the key flags defines the item type */ | |
175 | #define BTRFS_KEY_TYPE_MAX 256 | |
176 | #define BTRFS_KEY_TYPE_MASK (BTRFS_KEY_TYPE_MAX - 1) | |
177 | #define BTRFS_INODE_ITEM_KEY 1 | |
178 | #define BTRFS_DIR_ITEM_KEY 2 | |
179 | #define BTRFS_ROOT_ITEM_KEY 3 | |
180 | #define BTRFS_EXTENT_ITEM_KEY 4 | |
181 | #define BTRFS_STRING_ITEM_KEY 5 | |
182 | ||
183 | static inline u64 btrfs_dir_objectid(struct btrfs_dir_item *d) | |
184 | { | |
185 | return le64_to_cpu(d->objectid); | |
186 | } | |
187 | ||
188 | static inline void btrfs_set_dir_objectid(struct btrfs_dir_item *d, u64 val) | |
189 | { | |
190 | d->objectid = cpu_to_le64(val); | |
191 | } | |
192 | ||
193 | static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d) | |
194 | { | |
195 | return le16_to_cpu(d->flags); | |
196 | } | |
197 | ||
198 | static inline void btrfs_set_dir_flags(struct btrfs_dir_item *d, u16 val) | |
199 | { | |
200 | d->flags = cpu_to_le16(val); | |
201 | } | |
202 | ||
203 | static inline u8 btrfs_dir_type(struct btrfs_dir_item *d) | |
204 | { | |
205 | return d->type; | |
206 | } | |
207 | ||
208 | static inline void btrfs_set_dir_type(struct btrfs_dir_item *d, u8 val) | |
209 | { | |
210 | d->type = val; | |
211 | } | |
212 | ||
213 | ||
234b63a0 | 214 | static inline u64 btrfs_extent_owner(struct btrfs_extent_item *ei) |
cf27e1ee CM |
215 | { |
216 | return le64_to_cpu(ei->owner); | |
217 | } | |
218 | ||
234b63a0 | 219 | static inline void btrfs_set_extent_owner(struct btrfs_extent_item *ei, u64 val) |
cf27e1ee CM |
220 | { |
221 | ei->owner = cpu_to_le64(val); | |
222 | } | |
223 | ||
234b63a0 | 224 | static inline u32 btrfs_extent_refs(struct btrfs_extent_item *ei) |
cf27e1ee CM |
225 | { |
226 | return le32_to_cpu(ei->refs); | |
227 | } | |
228 | ||
234b63a0 | 229 | static inline void btrfs_set_extent_refs(struct btrfs_extent_item *ei, u32 val) |
cf27e1ee CM |
230 | { |
231 | ei->refs = cpu_to_le32(val); | |
232 | } | |
233 | ||
234b63a0 | 234 | static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr) |
1d4f8a0c | 235 | { |
123abc88 | 236 | return le64_to_cpu(n->ptrs[nr].blockptr); |
1d4f8a0c CM |
237 | } |
238 | ||
234b63a0 CM |
239 | static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr, |
240 | u64 val) | |
1d4f8a0c | 241 | { |
123abc88 | 242 | n->ptrs[nr].blockptr = cpu_to_le64(val); |
1d4f8a0c CM |
243 | } |
244 | ||
123abc88 | 245 | static inline u32 btrfs_item_offset(struct btrfs_item *item) |
0783fcfc | 246 | { |
123abc88 | 247 | return le32_to_cpu(item->offset); |
0783fcfc CM |
248 | } |
249 | ||
123abc88 | 250 | static inline void btrfs_set_item_offset(struct btrfs_item *item, u32 val) |
0783fcfc | 251 | { |
123abc88 | 252 | item->offset = cpu_to_le32(val); |
0783fcfc CM |
253 | } |
254 | ||
123abc88 | 255 | static inline u32 btrfs_item_end(struct btrfs_item *item) |
0783fcfc | 256 | { |
123abc88 | 257 | return le32_to_cpu(item->offset) + le16_to_cpu(item->size); |
0783fcfc CM |
258 | } |
259 | ||
260 | static inline u16 btrfs_item_size(struct btrfs_item *item) | |
261 | { | |
262 | return le16_to_cpu(item->size); | |
263 | } | |
264 | ||
265 | static inline void btrfs_set_item_size(struct btrfs_item *item, u16 val) | |
266 | { | |
267 | item->size = cpu_to_le16(val); | |
268 | } | |
269 | ||
e2fa7227 CM |
270 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
271 | struct btrfs_disk_key *disk) | |
272 | { | |
273 | cpu->offset = le64_to_cpu(disk->offset); | |
274 | cpu->flags = le32_to_cpu(disk->flags); | |
275 | cpu->objectid = le64_to_cpu(disk->objectid); | |
276 | } | |
277 | ||
278 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
279 | struct btrfs_key *cpu) | |
280 | { | |
281 | disk->offset = cpu_to_le64(cpu->offset); | |
282 | disk->flags = cpu_to_le32(cpu->flags); | |
283 | disk->objectid = cpu_to_le64(cpu->objectid); | |
284 | } | |
285 | ||
62e2749e | 286 | static inline u64 btrfs_disk_key_objectid(struct btrfs_disk_key *disk) |
e2fa7227 CM |
287 | { |
288 | return le64_to_cpu(disk->objectid); | |
289 | } | |
290 | ||
62e2749e CM |
291 | static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key *disk, |
292 | u64 val) | |
e2fa7227 CM |
293 | { |
294 | disk->objectid = cpu_to_le64(val); | |
295 | } | |
296 | ||
62e2749e | 297 | static inline u64 btrfs_disk_key_offset(struct btrfs_disk_key *disk) |
e2fa7227 CM |
298 | { |
299 | return le64_to_cpu(disk->offset); | |
300 | } | |
301 | ||
62e2749e CM |
302 | static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key *disk, |
303 | u64 val) | |
e2fa7227 CM |
304 | { |
305 | disk->offset = cpu_to_le64(val); | |
306 | } | |
307 | ||
62e2749e | 308 | static inline u32 btrfs_disk_key_flags(struct btrfs_disk_key *disk) |
e2fa7227 CM |
309 | { |
310 | return le32_to_cpu(disk->flags); | |
311 | } | |
312 | ||
62e2749e CM |
313 | static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key *disk, |
314 | u32 val) | |
e2fa7227 CM |
315 | { |
316 | disk->flags = cpu_to_le32(val); | |
317 | } | |
318 | ||
62e2749e CM |
319 | static inline u32 btrfs_key_type(struct btrfs_key *key) |
320 | { | |
321 | return key->flags & BTRFS_KEY_TYPE_MASK; | |
322 | } | |
323 | ||
324 | static inline u32 btrfs_disk_key_type(struct btrfs_disk_key *key) | |
325 | { | |
326 | return le32_to_cpu(key->flags) & BTRFS_KEY_TYPE_MASK; | |
327 | } | |
328 | ||
329 | static inline void btrfs_set_key_type(struct btrfs_key *key, u32 type) | |
330 | { | |
331 | BUG_ON(type >= BTRFS_KEY_TYPE_MAX); | |
332 | key->flags = (key->flags & ~((u64)BTRFS_KEY_TYPE_MASK)) | type; | |
333 | } | |
334 | ||
335 | static inline void btrfs_set_disk_key_type(struct btrfs_disk_key *key, u32 type) | |
336 | { | |
337 | u32 flags = btrfs_disk_key_flags(key); | |
338 | BUG_ON(type >= BTRFS_KEY_TYPE_MAX); | |
339 | flags = (flags & ~((u64)BTRFS_KEY_TYPE_MASK)) | type; | |
340 | btrfs_set_disk_key_flags(key, flags); | |
341 | } | |
342 | ||
343 | ||
344 | ||
bb492bb0 | 345 | static inline u64 btrfs_header_blocknr(struct btrfs_header *h) |
7518a238 | 346 | { |
bb492bb0 | 347 | return le64_to_cpu(h->blocknr); |
7518a238 CM |
348 | } |
349 | ||
bb492bb0 | 350 | static inline void btrfs_set_header_blocknr(struct btrfs_header *h, u64 blocknr) |
7518a238 | 351 | { |
bb492bb0 | 352 | h->blocknr = cpu_to_le64(blocknr); |
7518a238 CM |
353 | } |
354 | ||
bb492bb0 | 355 | static inline u64 btrfs_header_parentid(struct btrfs_header *h) |
7518a238 | 356 | { |
bb492bb0 | 357 | return le64_to_cpu(h->parentid); |
7518a238 CM |
358 | } |
359 | ||
bb492bb0 CM |
360 | static inline void btrfs_set_header_parentid(struct btrfs_header *h, |
361 | u64 parentid) | |
7518a238 | 362 | { |
bb492bb0 | 363 | h->parentid = cpu_to_le64(parentid); |
7518a238 CM |
364 | } |
365 | ||
bb492bb0 | 366 | static inline u16 btrfs_header_nritems(struct btrfs_header *h) |
7518a238 | 367 | { |
bb492bb0 | 368 | return le16_to_cpu(h->nritems); |
7518a238 CM |
369 | } |
370 | ||
bb492bb0 | 371 | static inline void btrfs_set_header_nritems(struct btrfs_header *h, u16 val) |
7518a238 | 372 | { |
bb492bb0 | 373 | h->nritems = cpu_to_le16(val); |
7518a238 CM |
374 | } |
375 | ||
bb492bb0 | 376 | static inline u16 btrfs_header_flags(struct btrfs_header *h) |
7518a238 | 377 | { |
bb492bb0 | 378 | return le16_to_cpu(h->flags); |
7518a238 CM |
379 | } |
380 | ||
bb492bb0 | 381 | static inline void btrfs_set_header_flags(struct btrfs_header *h, u16 val) |
7518a238 | 382 | { |
bb492bb0 | 383 | h->flags = cpu_to_le16(val); |
7518a238 CM |
384 | } |
385 | ||
bb492bb0 | 386 | static inline int btrfs_header_level(struct btrfs_header *h) |
7518a238 | 387 | { |
234b63a0 | 388 | return btrfs_header_flags(h) & (BTRFS_MAX_LEVEL - 1); |
7518a238 CM |
389 | } |
390 | ||
bb492bb0 | 391 | static inline void btrfs_set_header_level(struct btrfs_header *h, int level) |
7518a238 | 392 | { |
bb492bb0 | 393 | u16 flags; |
234b63a0 CM |
394 | BUG_ON(level > BTRFS_MAX_LEVEL); |
395 | flags = btrfs_header_flags(h) & ~(BTRFS_MAX_LEVEL - 1); | |
7518a238 CM |
396 | btrfs_set_header_flags(h, flags | level); |
397 | } | |
398 | ||
234b63a0 | 399 | static inline int btrfs_is_leaf(struct btrfs_node *n) |
7518a238 CM |
400 | { |
401 | return (btrfs_header_level(&n->header) == 0); | |
402 | } | |
403 | ||
3768f368 CM |
404 | static inline u64 btrfs_root_blocknr(struct btrfs_root_item *item) |
405 | { | |
406 | return le64_to_cpu(item->blocknr); | |
407 | } | |
408 | ||
409 | static inline void btrfs_set_root_blocknr(struct btrfs_root_item *item, u64 val) | |
410 | { | |
411 | item->blocknr = cpu_to_le64(val); | |
412 | } | |
413 | ||
414 | static inline u32 btrfs_root_refs(struct btrfs_root_item *item) | |
415 | { | |
416 | return le32_to_cpu(item->refs); | |
417 | } | |
418 | ||
419 | static inline void btrfs_set_root_refs(struct btrfs_root_item *item, u32 val) | |
420 | { | |
421 | item->refs = cpu_to_le32(val); | |
422 | } | |
423 | ||
424 | static inline u64 btrfs_super_blocknr(struct btrfs_super_block *s) | |
425 | { | |
426 | return le64_to_cpu(s->blocknr); | |
427 | } | |
428 | ||
429 | static inline void btrfs_set_super_blocknr(struct btrfs_super_block *s, u64 val) | |
430 | { | |
431 | s->blocknr = cpu_to_le64(val); | |
432 | } | |
433 | ||
434 | static inline u64 btrfs_super_root(struct btrfs_super_block *s) | |
435 | { | |
436 | return le64_to_cpu(s->root); | |
437 | } | |
438 | ||
439 | static inline void btrfs_set_super_root(struct btrfs_super_block *s, u64 val) | |
440 | { | |
441 | s->root = cpu_to_le64(val); | |
442 | } | |
443 | ||
444 | static inline u64 btrfs_super_total_blocks(struct btrfs_super_block *s) | |
445 | { | |
446 | return le64_to_cpu(s->total_blocks); | |
447 | } | |
448 | ||
449 | static inline void btrfs_set_super_total_blocks(struct btrfs_super_block *s, | |
450 | u64 val) | |
451 | { | |
452 | s->total_blocks = cpu_to_le64(val); | |
453 | } | |
454 | ||
455 | static inline u64 btrfs_super_blocks_used(struct btrfs_super_block *s) | |
456 | { | |
457 | return le64_to_cpu(s->blocks_used); | |
458 | } | |
459 | ||
460 | static inline void btrfs_set_super_blocks_used(struct btrfs_super_block *s, | |
461 | u64 val) | |
462 | { | |
463 | s->blocks_used = cpu_to_le64(val); | |
464 | } | |
465 | ||
123abc88 | 466 | static inline u32 btrfs_super_blocksize(struct btrfs_super_block *s) |
3768f368 | 467 | { |
123abc88 | 468 | return le32_to_cpu(s->blocksize); |
3768f368 CM |
469 | } |
470 | ||
471 | static inline void btrfs_set_super_blocksize(struct btrfs_super_block *s, | |
123abc88 CM |
472 | u32 val) |
473 | { | |
474 | s->blocksize = cpu_to_le32(val); | |
475 | } | |
476 | ||
477 | static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l) | |
3768f368 | 478 | { |
123abc88 | 479 | return (u8 *)l->items; |
3768f368 | 480 | } |
4beb1b8b CM |
481 | /* helper function to cast into the data area of the leaf. */ |
482 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 CM |
483 | ((type *)(btrfs_leaf_data(leaf) + \ |
484 | btrfs_item_offset((leaf)->items + (slot)))) | |
4beb1b8b | 485 | |
234b63a0 CM |
486 | struct btrfs_buffer *btrfs_alloc_free_block(struct btrfs_root *root); |
487 | int btrfs_inc_ref(struct btrfs_root *root, struct btrfs_buffer *buf); | |
488 | int btrfs_free_extent(struct btrfs_root *root, u64 blocknr, u64 num_blocks); | |
489 | int btrfs_search_slot(struct btrfs_root *root, struct btrfs_key *key, | |
490 | struct btrfs_path *p, int ins_len, int cow); | |
491 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); | |
492 | void btrfs_init_path(struct btrfs_path *p); | |
493 | int btrfs_del_item(struct btrfs_root *root, struct btrfs_path *path); | |
494 | int btrfs_insert_item(struct btrfs_root *root, struct btrfs_key *key, | |
62e2749e CM |
495 | void *data, u32 data_size); |
496 | int btrfs_insert_empty_item(struct btrfs_root *root, struct btrfs_path *path, | |
497 | struct btrfs_key *cpu_key, u32 data_size); | |
234b63a0 | 498 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
123abc88 | 499 | int btrfs_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf); |
234b63a0 CM |
500 | int btrfs_drop_snapshot(struct btrfs_root *root, struct btrfs_buffer *snap); |
501 | int btrfs_finish_extent_commit(struct btrfs_root *root); | |
3768f368 CM |
502 | int btrfs_del_root(struct btrfs_root *root, struct btrfs_key *key); |
503 | int btrfs_insert_root(struct btrfs_root *root, struct btrfs_key *key, | |
504 | struct btrfs_root_item *item); | |
505 | int btrfs_update_root(struct btrfs_root *root, struct btrfs_key *key, | |
506 | struct btrfs_root_item *item); | |
507 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, | |
508 | struct btrfs_root_item *item, struct btrfs_key *key); | |
eb60ceac | 509 | #endif |