Commit | Line | Data |
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234b63a0 CM |
1 | #ifndef __BTRFS__ |
2 | #define __BTRFS__ | |
eb60ceac | 3 | |
e20d96d6 | 4 | #include <linux/fs.h> |
8ef97622 | 5 | #include "bit-radix.h" |
e20d96d6 | 6 | |
e089f05c | 7 | struct btrfs_trans_handle; |
79154b1b | 8 | struct btrfs_transaction; |
e089f05c | 9 | |
3768f368 | 10 | #define BTRFS_MAGIC "_BtRfS_M" |
eb60ceac | 11 | |
6407bf6d CM |
12 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
13 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL | |
14 | #define BTRFS_INODE_MAP_OBJECTID 3ULL | |
15 | #define BTRFS_FS_TREE_OBJECTID 4ULL | |
16 | #define BTRFS_FIRST_FREE_OBJECTID 5ULL | |
3768f368 | 17 | |
e20d96d6 CM |
18 | /* |
19 | * we can actually store much bigger names, but lets not confuse the rest | |
20 | * of linux | |
21 | */ | |
22 | #define BTRFS_NAME_LEN 255 | |
23 | ||
fec577fb CM |
24 | /* |
25 | * the key defines the order in the tree, and so it also defines (optimal) | |
26 | * block layout. objectid corresonds to the inode number. The flags | |
27 | * tells us things about the object, and is a kind of stream selector. | |
28 | * so for a given inode, keys with flags of 1 might refer to the inode | |
29 | * data, flags of 2 may point to file data in the btree and flags == 3 | |
30 | * may point to extents. | |
31 | * | |
32 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
33 | * |
34 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
35 | * in cpu native order. Otherwise they are identical and their sizes | |
36 | * should be the same (ie both packed) | |
fec577fb | 37 | */ |
e2fa7227 CM |
38 | struct btrfs_disk_key { |
39 | __le64 objectid; | |
a1516c89 | 40 | __le32 flags; |
a8a2ee0c | 41 | __le64 offset; |
e2fa7227 CM |
42 | } __attribute__ ((__packed__)); |
43 | ||
44 | struct btrfs_key { | |
eb60ceac | 45 | u64 objectid; |
a1516c89 | 46 | u32 flags; |
a8a2ee0c | 47 | u64 offset; |
eb60ceac CM |
48 | } __attribute__ ((__packed__)); |
49 | ||
fec577fb CM |
50 | /* |
51 | * every tree block (leaf or node) starts with this header. | |
52 | */ | |
bb492bb0 | 53 | struct btrfs_header { |
87cbda5c | 54 | __le32 csum[8]; |
3768f368 | 55 | u8 fsid[16]; /* FS specific uuid */ |
bb492bb0 | 56 | __le64 blocknr; /* which block this node is supposed to live in */ |
7f5c1516 | 57 | __le64 generation; |
bb492bb0 | 58 | __le64 parentid; /* objectid of the tree root */ |
bb492bb0 CM |
59 | __le32 ham; |
60 | __le16 nritems; | |
61 | __le16 flags; | |
9a6f11ed | 62 | u8 level; |
eb60ceac CM |
63 | } __attribute__ ((__packed__)); |
64 | ||
234b63a0 | 65 | #define BTRFS_MAX_LEVEL 8 |
123abc88 CM |
66 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \ |
67 | sizeof(struct btrfs_header)) / \ | |
68 | (sizeof(struct btrfs_disk_key) + sizeof(u64))) | |
69 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) | |
70 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize)) | |
eb60ceac | 71 | |
e20d96d6 | 72 | struct buffer_head; |
fec577fb CM |
73 | /* |
74 | * the super block basically lists the main trees of the FS | |
75 | * it currently lacks any block count etc etc | |
76 | */ | |
234b63a0 | 77 | struct btrfs_super_block { |
87cbda5c CM |
78 | __le32 csum[8]; |
79 | /* the first 3 fields must match struct btrfs_header */ | |
3768f368 CM |
80 | u8 fsid[16]; /* FS specific uuid */ |
81 | __le64 blocknr; /* this block number */ | |
3768f368 | 82 | __le64 magic; |
123abc88 | 83 | __le32 blocksize; |
3768f368 CM |
84 | __le64 generation; |
85 | __le64 root; | |
86 | __le64 total_blocks; | |
87 | __le64 blocks_used; | |
2e635a27 | 88 | __le64 root_dir_objectid; |
cfaa7295 CM |
89 | } __attribute__ ((__packed__)); |
90 | ||
fec577fb | 91 | /* |
62e2749e | 92 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
93 | * the item in the leaf (relative to the start of the data area) |
94 | */ | |
0783fcfc | 95 | struct btrfs_item { |
e2fa7227 | 96 | struct btrfs_disk_key key; |
123abc88 | 97 | __le32 offset; |
0783fcfc | 98 | __le16 size; |
eb60ceac CM |
99 | } __attribute__ ((__packed__)); |
100 | ||
fec577fb CM |
101 | /* |
102 | * leaves have an item area and a data area: | |
103 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
104 | * | |
105 | * The data is separate from the items to get the keys closer together | |
106 | * during searches. | |
107 | */ | |
234b63a0 | 108 | struct btrfs_leaf { |
bb492bb0 | 109 | struct btrfs_header header; |
123abc88 | 110 | struct btrfs_item items[]; |
eb60ceac CM |
111 | } __attribute__ ((__packed__)); |
112 | ||
fec577fb CM |
113 | /* |
114 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
115 | * other blocks | |
116 | */ | |
123abc88 CM |
117 | struct btrfs_key_ptr { |
118 | struct btrfs_disk_key key; | |
119 | __le64 blockptr; | |
120 | } __attribute__ ((__packed__)); | |
121 | ||
234b63a0 | 122 | struct btrfs_node { |
bb492bb0 | 123 | struct btrfs_header header; |
123abc88 | 124 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
125 | } __attribute__ ((__packed__)); |
126 | ||
fec577fb | 127 | /* |
234b63a0 CM |
128 | * btrfs_paths remember the path taken from the root down to the leaf. |
129 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
130 | * to any other levels that are present. |
131 | * | |
132 | * The slots array records the index of the item or block pointer | |
133 | * used while walking the tree. | |
134 | */ | |
234b63a0 | 135 | struct btrfs_path { |
e20d96d6 | 136 | struct buffer_head *nodes[BTRFS_MAX_LEVEL]; |
234b63a0 | 137 | int slots[BTRFS_MAX_LEVEL]; |
eb60ceac | 138 | }; |
5de08d7d | 139 | |
62e2749e CM |
140 | /* |
141 | * items in the extent btree are used to record the objectid of the | |
142 | * owner of the block and the number of references | |
143 | */ | |
144 | struct btrfs_extent_item { | |
145 | __le32 refs; | |
146 | __le64 owner; | |
147 | } __attribute__ ((__packed__)); | |
148 | ||
1e1d2701 CM |
149 | struct btrfs_inode_timespec { |
150 | __le32 sec; | |
151 | __le32 nsec; | |
152 | } __attribute__ ((__packed__)); | |
153 | ||
154 | /* | |
155 | * there is no padding here on purpose. If you want to extent the inode, | |
156 | * make a new item type | |
157 | */ | |
158 | struct btrfs_inode_item { | |
159 | __le64 generation; | |
160 | __le64 size; | |
161 | __le64 nblocks; | |
162 | __le32 nlink; | |
163 | __le32 uid; | |
164 | __le32 gid; | |
165 | __le32 mode; | |
166 | __le32 rdev; | |
167 | __le16 flags; | |
168 | __le16 compat_flags; | |
169 | struct btrfs_inode_timespec atime; | |
170 | struct btrfs_inode_timespec ctime; | |
171 | struct btrfs_inode_timespec mtime; | |
172 | struct btrfs_inode_timespec otime; | |
173 | } __attribute__ ((__packed__)); | |
174 | ||
175 | /* inline data is just a blob of bytes */ | |
176 | struct btrfs_inline_data_item { | |
177 | u8 data; | |
178 | } __attribute__ ((__packed__)); | |
179 | ||
62e2749e CM |
180 | struct btrfs_dir_item { |
181 | __le64 objectid; | |
182 | __le16 flags; | |
a8a2ee0c | 183 | __le16 name_len; |
62e2749e CM |
184 | u8 type; |
185 | } __attribute__ ((__packed__)); | |
186 | ||
187 | struct btrfs_root_item { | |
188 | __le64 blocknr; | |
189 | __le32 flags; | |
190 | __le64 block_limit; | |
191 | __le64 blocks_used; | |
192 | __le32 refs; | |
9f5fae2f | 193 | } __attribute__ ((__packed__)); |
62e2749e | 194 | |
9f5fae2f | 195 | struct btrfs_file_extent_item { |
71951f35 | 196 | __le64 generation; |
9f5fae2f CM |
197 | /* |
198 | * disk space consumed by the extent, checksum blocks are included | |
199 | * in these numbers | |
200 | */ | |
201 | __le64 disk_blocknr; | |
202 | __le64 disk_num_blocks; | |
203 | /* | |
dee26a9f | 204 | * the logical offset in file blocks (no csums) |
9f5fae2f CM |
205 | * this extent record is for. This allows a file extent to point |
206 | * into the middle of an existing extent on disk, sharing it | |
207 | * between two snapshots (useful if some bytes in the middle of the | |
208 | * extent have changed | |
209 | */ | |
210 | __le64 offset; | |
211 | /* | |
212 | * the logical number of file blocks (no csums included) | |
213 | */ | |
214 | __le64 num_blocks; | |
215 | } __attribute__ ((__packed__)); | |
216 | ||
217 | struct btrfs_inode_map_item { | |
218 | struct btrfs_disk_key key; | |
219 | } __attribute__ ((__packed__)); | |
220 | ||
87cbda5c | 221 | struct crypto_hash; |
9f5fae2f CM |
222 | struct btrfs_fs_info { |
223 | struct btrfs_root *fs_root; | |
62e2749e CM |
224 | struct btrfs_root *extent_root; |
225 | struct btrfs_root *tree_root; | |
9f5fae2f | 226 | struct btrfs_root *inode_root; |
62e2749e CM |
227 | struct btrfs_key current_insert; |
228 | struct btrfs_key last_insert; | |
8ef97622 | 229 | struct radix_tree_root pending_del_radix; |
62e2749e | 230 | struct radix_tree_root pinned_radix; |
9f5fae2f CM |
231 | u64 last_inode_alloc; |
232 | u64 last_inode_alloc_dirid; | |
293ffd5f | 233 | u64 generation; |
79154b1b | 234 | struct btrfs_transaction *running_transaction; |
1261ec42 | 235 | struct btrfs_super_block *disk_super; |
e20d96d6 CM |
236 | struct buffer_head *sb_buffer; |
237 | struct super_block *sb; | |
d98237b3 | 238 | struct inode *btree_inode; |
79154b1b | 239 | struct mutex trans_mutex; |
d561c025 | 240 | struct mutex fs_mutex; |
87cbda5c CM |
241 | struct crypto_hash *hash_tfm; |
242 | spinlock_t hash_lock; | |
9f5fae2f CM |
243 | }; |
244 | ||
245 | /* | |
246 | * in ram representation of the tree. extent_root is used for all allocations | |
247 | * and for the extent tree extent_root root. current_insert is used | |
248 | * only for the extent tree. | |
249 | */ | |
250 | struct btrfs_root { | |
e20d96d6 CM |
251 | struct buffer_head *node; |
252 | struct buffer_head *commit_root; | |
62e2749e CM |
253 | struct btrfs_root_item root_item; |
254 | struct btrfs_key root_key; | |
9f5fae2f | 255 | struct btrfs_fs_info *fs_info; |
62e2749e | 256 | u32 blocksize; |
9f5fae2f CM |
257 | int ref_cows; |
258 | u32 type; | |
62e2749e CM |
259 | }; |
260 | ||
62e2749e CM |
261 | /* the lower bits in the key flags defines the item type */ |
262 | #define BTRFS_KEY_TYPE_MAX 256 | |
263 | #define BTRFS_KEY_TYPE_MASK (BTRFS_KEY_TYPE_MAX - 1) | |
1e1d2701 CM |
264 | |
265 | /* | |
266 | * inode items have the data typically returned from stat and store other | |
267 | * info about object characteristics. There is one for every file and dir in | |
268 | * the FS | |
269 | */ | |
62e2749e | 270 | #define BTRFS_INODE_ITEM_KEY 1 |
1e1d2701 CM |
271 | |
272 | /* | |
273 | * dir items are the name -> inode pointers in a directory. There is one | |
274 | * for every name in a directory. | |
275 | */ | |
62e2749e | 276 | #define BTRFS_DIR_ITEM_KEY 2 |
1e1d2701 CM |
277 | /* |
278 | * inline data is file data that fits in the btree. | |
279 | */ | |
280 | #define BTRFS_INLINE_DATA_KEY 3 | |
281 | /* | |
282 | * extent data is for data that can't fit in the btree. It points to | |
283 | * a (hopefully) huge chunk of disk | |
284 | */ | |
285 | #define BTRFS_EXTENT_DATA_KEY 4 | |
286 | /* | |
287 | * root items point to tree roots. There are typically in the root | |
288 | * tree used by the super block to find all the other trees | |
289 | */ | |
290 | #define BTRFS_ROOT_ITEM_KEY 5 | |
291 | /* | |
292 | * extent items are in the extent map tree. These record which blocks | |
293 | * are used, and how many references there are to each block | |
294 | */ | |
295 | #define BTRFS_EXTENT_ITEM_KEY 6 | |
9f5fae2f CM |
296 | |
297 | /* | |
298 | * the inode map records which inode numbers are in use and where | |
299 | * they actually live on disk | |
300 | */ | |
301 | #define BTRFS_INODE_MAP_ITEM_KEY 7 | |
1e1d2701 CM |
302 | /* |
303 | * string items are for debugging. They just store a short string of | |
304 | * data in the FS | |
305 | */ | |
9f5fae2f | 306 | #define BTRFS_STRING_ITEM_KEY 8 |
1e1d2701 CM |
307 | |
308 | static inline u64 btrfs_inode_generation(struct btrfs_inode_item *i) | |
309 | { | |
310 | return le64_to_cpu(i->generation); | |
311 | } | |
312 | ||
313 | static inline void btrfs_set_inode_generation(struct btrfs_inode_item *i, | |
314 | u64 val) | |
315 | { | |
316 | i->generation = cpu_to_le64(val); | |
317 | } | |
318 | ||
319 | static inline u64 btrfs_inode_size(struct btrfs_inode_item *i) | |
320 | { | |
321 | return le64_to_cpu(i->size); | |
322 | } | |
323 | ||
324 | static inline void btrfs_set_inode_size(struct btrfs_inode_item *i, u64 val) | |
325 | { | |
326 | i->size = cpu_to_le64(val); | |
327 | } | |
328 | ||
329 | static inline u64 btrfs_inode_nblocks(struct btrfs_inode_item *i) | |
330 | { | |
331 | return le64_to_cpu(i->nblocks); | |
332 | } | |
333 | ||
334 | static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item *i, u64 val) | |
335 | { | |
336 | i->nblocks = cpu_to_le64(val); | |
337 | } | |
338 | ||
339 | static inline u32 btrfs_inode_nlink(struct btrfs_inode_item *i) | |
340 | { | |
341 | return le32_to_cpu(i->nlink); | |
342 | } | |
343 | ||
344 | static inline void btrfs_set_inode_nlink(struct btrfs_inode_item *i, u32 val) | |
345 | { | |
346 | i->nlink = cpu_to_le32(val); | |
347 | } | |
348 | ||
349 | static inline u32 btrfs_inode_uid(struct btrfs_inode_item *i) | |
350 | { | |
351 | return le32_to_cpu(i->uid); | |
352 | } | |
353 | ||
354 | static inline void btrfs_set_inode_uid(struct btrfs_inode_item *i, u32 val) | |
355 | { | |
356 | i->uid = cpu_to_le32(val); | |
357 | } | |
358 | ||
359 | static inline u32 btrfs_inode_gid(struct btrfs_inode_item *i) | |
360 | { | |
361 | return le32_to_cpu(i->gid); | |
362 | } | |
363 | ||
364 | static inline void btrfs_set_inode_gid(struct btrfs_inode_item *i, u32 val) | |
365 | { | |
366 | i->gid = cpu_to_le32(val); | |
367 | } | |
368 | ||
369 | static inline u32 btrfs_inode_mode(struct btrfs_inode_item *i) | |
370 | { | |
371 | return le32_to_cpu(i->mode); | |
372 | } | |
373 | ||
374 | static inline void btrfs_set_inode_mode(struct btrfs_inode_item *i, u32 val) | |
375 | { | |
376 | i->mode = cpu_to_le32(val); | |
377 | } | |
378 | ||
379 | static inline u32 btrfs_inode_rdev(struct btrfs_inode_item *i) | |
380 | { | |
381 | return le32_to_cpu(i->rdev); | |
382 | } | |
383 | ||
384 | static inline void btrfs_set_inode_rdev(struct btrfs_inode_item *i, u32 val) | |
385 | { | |
386 | i->rdev = cpu_to_le32(val); | |
387 | } | |
388 | ||
389 | static inline u16 btrfs_inode_flags(struct btrfs_inode_item *i) | |
390 | { | |
391 | return le16_to_cpu(i->flags); | |
392 | } | |
393 | ||
394 | static inline void btrfs_set_inode_flags(struct btrfs_inode_item *i, u16 val) | |
395 | { | |
396 | i->flags = cpu_to_le16(val); | |
397 | } | |
398 | ||
399 | static inline u16 btrfs_inode_compat_flags(struct btrfs_inode_item *i) | |
400 | { | |
401 | return le16_to_cpu(i->compat_flags); | |
402 | } | |
403 | ||
404 | static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item *i, | |
405 | u16 val) | |
406 | { | |
407 | i->compat_flags = cpu_to_le16(val); | |
408 | } | |
409 | ||
e20d96d6 CM |
410 | static inline u32 btrfs_timespec_sec(struct btrfs_inode_timespec *ts) |
411 | { | |
412 | return le32_to_cpu(ts->sec); | |
413 | } | |
414 | ||
415 | static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec *ts, | |
416 | u32 val) | |
417 | { | |
418 | ts->sec = cpu_to_le32(val); | |
419 | } | |
420 | ||
421 | static inline u32 btrfs_timespec_nsec(struct btrfs_inode_timespec *ts) | |
422 | { | |
423 | return le32_to_cpu(ts->nsec); | |
424 | } | |
425 | ||
426 | static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec *ts, | |
427 | u32 val) | |
428 | { | |
429 | ts->nsec = cpu_to_le32(val); | |
430 | } | |
431 | ||
432 | ||
62e2749e | 433 | |
234b63a0 | 434 | static inline u64 btrfs_extent_owner(struct btrfs_extent_item *ei) |
cf27e1ee CM |
435 | { |
436 | return le64_to_cpu(ei->owner); | |
437 | } | |
438 | ||
234b63a0 | 439 | static inline void btrfs_set_extent_owner(struct btrfs_extent_item *ei, u64 val) |
cf27e1ee CM |
440 | { |
441 | ei->owner = cpu_to_le64(val); | |
442 | } | |
443 | ||
234b63a0 | 444 | static inline u32 btrfs_extent_refs(struct btrfs_extent_item *ei) |
cf27e1ee CM |
445 | { |
446 | return le32_to_cpu(ei->refs); | |
447 | } | |
448 | ||
234b63a0 | 449 | static inline void btrfs_set_extent_refs(struct btrfs_extent_item *ei, u32 val) |
cf27e1ee CM |
450 | { |
451 | ei->refs = cpu_to_le32(val); | |
452 | } | |
453 | ||
234b63a0 | 454 | static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr) |
1d4f8a0c | 455 | { |
123abc88 | 456 | return le64_to_cpu(n->ptrs[nr].blockptr); |
1d4f8a0c CM |
457 | } |
458 | ||
234b63a0 CM |
459 | static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr, |
460 | u64 val) | |
1d4f8a0c | 461 | { |
123abc88 | 462 | n->ptrs[nr].blockptr = cpu_to_le64(val); |
1d4f8a0c CM |
463 | } |
464 | ||
123abc88 | 465 | static inline u32 btrfs_item_offset(struct btrfs_item *item) |
0783fcfc | 466 | { |
123abc88 | 467 | return le32_to_cpu(item->offset); |
0783fcfc CM |
468 | } |
469 | ||
123abc88 | 470 | static inline void btrfs_set_item_offset(struct btrfs_item *item, u32 val) |
0783fcfc | 471 | { |
123abc88 | 472 | item->offset = cpu_to_le32(val); |
0783fcfc CM |
473 | } |
474 | ||
123abc88 | 475 | static inline u32 btrfs_item_end(struct btrfs_item *item) |
0783fcfc | 476 | { |
123abc88 | 477 | return le32_to_cpu(item->offset) + le16_to_cpu(item->size); |
0783fcfc CM |
478 | } |
479 | ||
480 | static inline u16 btrfs_item_size(struct btrfs_item *item) | |
481 | { | |
482 | return le16_to_cpu(item->size); | |
483 | } | |
484 | ||
485 | static inline void btrfs_set_item_size(struct btrfs_item *item, u16 val) | |
486 | { | |
487 | item->size = cpu_to_le16(val); | |
488 | } | |
489 | ||
1d4f6404 CM |
490 | static inline u64 btrfs_dir_objectid(struct btrfs_dir_item *d) |
491 | { | |
492 | return le64_to_cpu(d->objectid); | |
493 | } | |
494 | ||
495 | static inline void btrfs_set_dir_objectid(struct btrfs_dir_item *d, u64 val) | |
496 | { | |
497 | d->objectid = cpu_to_le64(val); | |
498 | } | |
499 | ||
500 | static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d) | |
501 | { | |
502 | return le16_to_cpu(d->flags); | |
503 | } | |
504 | ||
505 | static inline void btrfs_set_dir_flags(struct btrfs_dir_item *d, u16 val) | |
506 | { | |
507 | d->flags = cpu_to_le16(val); | |
508 | } | |
509 | ||
510 | static inline u8 btrfs_dir_type(struct btrfs_dir_item *d) | |
511 | { | |
512 | return d->type; | |
513 | } | |
514 | ||
515 | static inline void btrfs_set_dir_type(struct btrfs_dir_item *d, u8 val) | |
516 | { | |
517 | d->type = val; | |
518 | } | |
519 | ||
a8a2ee0c CM |
520 | static inline u16 btrfs_dir_name_len(struct btrfs_dir_item *d) |
521 | { | |
522 | return le16_to_cpu(d->name_len); | |
523 | } | |
524 | ||
525 | static inline void btrfs_set_dir_name_len(struct btrfs_dir_item *d, u16 val) | |
1d4f6404 | 526 | { |
a8a2ee0c | 527 | d->name_len = cpu_to_le16(val); |
1d4f6404 CM |
528 | } |
529 | ||
e2fa7227 CM |
530 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
531 | struct btrfs_disk_key *disk) | |
532 | { | |
533 | cpu->offset = le64_to_cpu(disk->offset); | |
534 | cpu->flags = le32_to_cpu(disk->flags); | |
535 | cpu->objectid = le64_to_cpu(disk->objectid); | |
536 | } | |
537 | ||
538 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
539 | struct btrfs_key *cpu) | |
540 | { | |
541 | disk->offset = cpu_to_le64(cpu->offset); | |
542 | disk->flags = cpu_to_le32(cpu->flags); | |
543 | disk->objectid = cpu_to_le64(cpu->objectid); | |
544 | } | |
545 | ||
62e2749e | 546 | static inline u64 btrfs_disk_key_objectid(struct btrfs_disk_key *disk) |
e2fa7227 CM |
547 | { |
548 | return le64_to_cpu(disk->objectid); | |
549 | } | |
550 | ||
62e2749e CM |
551 | static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key *disk, |
552 | u64 val) | |
e2fa7227 CM |
553 | { |
554 | disk->objectid = cpu_to_le64(val); | |
555 | } | |
556 | ||
62e2749e | 557 | static inline u64 btrfs_disk_key_offset(struct btrfs_disk_key *disk) |
e2fa7227 CM |
558 | { |
559 | return le64_to_cpu(disk->offset); | |
560 | } | |
561 | ||
62e2749e CM |
562 | static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key *disk, |
563 | u64 val) | |
e2fa7227 CM |
564 | { |
565 | disk->offset = cpu_to_le64(val); | |
566 | } | |
567 | ||
62e2749e | 568 | static inline u32 btrfs_disk_key_flags(struct btrfs_disk_key *disk) |
e2fa7227 CM |
569 | { |
570 | return le32_to_cpu(disk->flags); | |
571 | } | |
572 | ||
62e2749e CM |
573 | static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key *disk, |
574 | u32 val) | |
e2fa7227 CM |
575 | { |
576 | disk->flags = cpu_to_le32(val); | |
577 | } | |
578 | ||
62e2749e CM |
579 | static inline u32 btrfs_key_type(struct btrfs_key *key) |
580 | { | |
581 | return key->flags & BTRFS_KEY_TYPE_MASK; | |
582 | } | |
583 | ||
584 | static inline u32 btrfs_disk_key_type(struct btrfs_disk_key *key) | |
585 | { | |
586 | return le32_to_cpu(key->flags) & BTRFS_KEY_TYPE_MASK; | |
587 | } | |
588 | ||
589 | static inline void btrfs_set_key_type(struct btrfs_key *key, u32 type) | |
590 | { | |
591 | BUG_ON(type >= BTRFS_KEY_TYPE_MAX); | |
592 | key->flags = (key->flags & ~((u64)BTRFS_KEY_TYPE_MASK)) | type; | |
593 | } | |
594 | ||
595 | static inline void btrfs_set_disk_key_type(struct btrfs_disk_key *key, u32 type) | |
596 | { | |
597 | u32 flags = btrfs_disk_key_flags(key); | |
598 | BUG_ON(type >= BTRFS_KEY_TYPE_MAX); | |
599 | flags = (flags & ~((u64)BTRFS_KEY_TYPE_MASK)) | type; | |
600 | btrfs_set_disk_key_flags(key, flags); | |
601 | } | |
602 | ||
bb492bb0 | 603 | static inline u64 btrfs_header_blocknr(struct btrfs_header *h) |
7518a238 | 604 | { |
bb492bb0 | 605 | return le64_to_cpu(h->blocknr); |
7518a238 CM |
606 | } |
607 | ||
bb492bb0 | 608 | static inline void btrfs_set_header_blocknr(struct btrfs_header *h, u64 blocknr) |
7518a238 | 609 | { |
bb492bb0 | 610 | h->blocknr = cpu_to_le64(blocknr); |
7518a238 CM |
611 | } |
612 | ||
7f5c1516 CM |
613 | static inline u64 btrfs_header_generation(struct btrfs_header *h) |
614 | { | |
615 | return le64_to_cpu(h->generation); | |
616 | } | |
617 | ||
618 | static inline void btrfs_set_header_generation(struct btrfs_header *h, | |
619 | u64 val) | |
620 | { | |
621 | h->generation = cpu_to_le64(val); | |
622 | } | |
623 | ||
bb492bb0 | 624 | static inline u64 btrfs_header_parentid(struct btrfs_header *h) |
7518a238 | 625 | { |
bb492bb0 | 626 | return le64_to_cpu(h->parentid); |
7518a238 CM |
627 | } |
628 | ||
bb492bb0 CM |
629 | static inline void btrfs_set_header_parentid(struct btrfs_header *h, |
630 | u64 parentid) | |
7518a238 | 631 | { |
bb492bb0 | 632 | h->parentid = cpu_to_le64(parentid); |
7518a238 CM |
633 | } |
634 | ||
bb492bb0 | 635 | static inline u16 btrfs_header_nritems(struct btrfs_header *h) |
7518a238 | 636 | { |
bb492bb0 | 637 | return le16_to_cpu(h->nritems); |
7518a238 CM |
638 | } |
639 | ||
bb492bb0 | 640 | static inline void btrfs_set_header_nritems(struct btrfs_header *h, u16 val) |
7518a238 | 641 | { |
bb492bb0 | 642 | h->nritems = cpu_to_le16(val); |
7518a238 CM |
643 | } |
644 | ||
bb492bb0 | 645 | static inline u16 btrfs_header_flags(struct btrfs_header *h) |
7518a238 | 646 | { |
bb492bb0 | 647 | return le16_to_cpu(h->flags); |
7518a238 CM |
648 | } |
649 | ||
bb492bb0 | 650 | static inline void btrfs_set_header_flags(struct btrfs_header *h, u16 val) |
7518a238 | 651 | { |
bb492bb0 | 652 | h->flags = cpu_to_le16(val); |
7518a238 CM |
653 | } |
654 | ||
bb492bb0 | 655 | static inline int btrfs_header_level(struct btrfs_header *h) |
7518a238 | 656 | { |
9a6f11ed | 657 | return h->level; |
7518a238 CM |
658 | } |
659 | ||
bb492bb0 | 660 | static inline void btrfs_set_header_level(struct btrfs_header *h, int level) |
7518a238 | 661 | { |
234b63a0 | 662 | BUG_ON(level > BTRFS_MAX_LEVEL); |
9a6f11ed | 663 | h->level = level; |
7518a238 CM |
664 | } |
665 | ||
234b63a0 | 666 | static inline int btrfs_is_leaf(struct btrfs_node *n) |
7518a238 CM |
667 | { |
668 | return (btrfs_header_level(&n->header) == 0); | |
669 | } | |
670 | ||
3768f368 CM |
671 | static inline u64 btrfs_root_blocknr(struct btrfs_root_item *item) |
672 | { | |
673 | return le64_to_cpu(item->blocknr); | |
674 | } | |
675 | ||
676 | static inline void btrfs_set_root_blocknr(struct btrfs_root_item *item, u64 val) | |
677 | { | |
678 | item->blocknr = cpu_to_le64(val); | |
679 | } | |
680 | ||
681 | static inline u32 btrfs_root_refs(struct btrfs_root_item *item) | |
682 | { | |
683 | return le32_to_cpu(item->refs); | |
684 | } | |
685 | ||
686 | static inline void btrfs_set_root_refs(struct btrfs_root_item *item, u32 val) | |
687 | { | |
688 | item->refs = cpu_to_le32(val); | |
689 | } | |
690 | ||
691 | static inline u64 btrfs_super_blocknr(struct btrfs_super_block *s) | |
692 | { | |
693 | return le64_to_cpu(s->blocknr); | |
694 | } | |
695 | ||
696 | static inline void btrfs_set_super_blocknr(struct btrfs_super_block *s, u64 val) | |
697 | { | |
698 | s->blocknr = cpu_to_le64(val); | |
699 | } | |
700 | ||
701 | static inline u64 btrfs_super_root(struct btrfs_super_block *s) | |
702 | { | |
703 | return le64_to_cpu(s->root); | |
704 | } | |
705 | ||
706 | static inline void btrfs_set_super_root(struct btrfs_super_block *s, u64 val) | |
707 | { | |
708 | s->root = cpu_to_le64(val); | |
709 | } | |
710 | ||
711 | static inline u64 btrfs_super_total_blocks(struct btrfs_super_block *s) | |
712 | { | |
713 | return le64_to_cpu(s->total_blocks); | |
714 | } | |
715 | ||
716 | static inline void btrfs_set_super_total_blocks(struct btrfs_super_block *s, | |
717 | u64 val) | |
718 | { | |
719 | s->total_blocks = cpu_to_le64(val); | |
720 | } | |
721 | ||
722 | static inline u64 btrfs_super_blocks_used(struct btrfs_super_block *s) | |
723 | { | |
724 | return le64_to_cpu(s->blocks_used); | |
725 | } | |
726 | ||
727 | static inline void btrfs_set_super_blocks_used(struct btrfs_super_block *s, | |
728 | u64 val) | |
729 | { | |
730 | s->blocks_used = cpu_to_le64(val); | |
731 | } | |
732 | ||
123abc88 | 733 | static inline u32 btrfs_super_blocksize(struct btrfs_super_block *s) |
3768f368 | 734 | { |
123abc88 | 735 | return le32_to_cpu(s->blocksize); |
3768f368 CM |
736 | } |
737 | ||
738 | static inline void btrfs_set_super_blocksize(struct btrfs_super_block *s, | |
123abc88 CM |
739 | u32 val) |
740 | { | |
741 | s->blocksize = cpu_to_le32(val); | |
742 | } | |
743 | ||
2e635a27 CM |
744 | static inline u64 btrfs_super_root_dir(struct btrfs_super_block *s) |
745 | { | |
746 | return le64_to_cpu(s->root_dir_objectid); | |
747 | } | |
748 | ||
749 | static inline void btrfs_set_super_root_dir(struct btrfs_super_block *s, u64 | |
750 | val) | |
751 | { | |
752 | s->root_dir_objectid = cpu_to_le64(val); | |
753 | } | |
754 | ||
123abc88 | 755 | static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l) |
3768f368 | 756 | { |
123abc88 | 757 | return (u8 *)l->items; |
3768f368 | 758 | } |
9f5fae2f CM |
759 | |
760 | static inline u64 btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item | |
761 | *e) | |
762 | { | |
763 | return le64_to_cpu(e->disk_blocknr); | |
764 | } | |
765 | ||
766 | static inline void btrfs_set_file_extent_disk_blocknr(struct | |
767 | btrfs_file_extent_item | |
768 | *e, u64 val) | |
769 | { | |
770 | e->disk_blocknr = cpu_to_le64(val); | |
771 | } | |
772 | ||
71951f35 CM |
773 | static inline u64 btrfs_file_extent_generation(struct btrfs_file_extent_item *e) |
774 | { | |
775 | return le64_to_cpu(e->generation); | |
776 | } | |
777 | ||
778 | static inline void btrfs_set_file_extent_generation(struct | |
779 | btrfs_file_extent_item *e, | |
780 | u64 val) | |
781 | { | |
782 | e->generation = cpu_to_le64(val); | |
783 | } | |
784 | ||
9f5fae2f CM |
785 | static inline u64 btrfs_file_extent_disk_num_blocks(struct |
786 | btrfs_file_extent_item *e) | |
787 | { | |
788 | return le64_to_cpu(e->disk_num_blocks); | |
789 | } | |
790 | ||
791 | static inline void btrfs_set_file_extent_disk_num_blocks(struct | |
792 | btrfs_file_extent_item | |
793 | *e, u64 val) | |
794 | { | |
795 | e->disk_num_blocks = cpu_to_le64(val); | |
796 | } | |
797 | ||
798 | static inline u64 btrfs_file_extent_offset(struct btrfs_file_extent_item *e) | |
799 | { | |
800 | return le64_to_cpu(e->offset); | |
801 | } | |
802 | ||
803 | static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item | |
804 | *e, u64 val) | |
805 | { | |
806 | e->offset = cpu_to_le64(val); | |
807 | } | |
808 | ||
809 | static inline u64 btrfs_file_extent_num_blocks(struct btrfs_file_extent_item | |
810 | *e) | |
811 | { | |
812 | return le64_to_cpu(e->num_blocks); | |
813 | } | |
814 | ||
815 | static inline void btrfs_set_file_extent_num_blocks(struct | |
816 | btrfs_file_extent_item *e, | |
817 | u64 val) | |
818 | { | |
819 | e->num_blocks = cpu_to_le64(val); | |
820 | } | |
821 | ||
e20d96d6 CM |
822 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
823 | { | |
824 | return sb->s_fs_info; | |
825 | } | |
826 | ||
4beb1b8b CM |
827 | /* helper function to cast into the data area of the leaf. */ |
828 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 CM |
829 | ((type *)(btrfs_leaf_data(leaf) + \ |
830 | btrfs_item_offset((leaf)->items + (slot)))) | |
4beb1b8b | 831 | |
dee26a9f | 832 | /* extent-item.c */ |
e20d96d6 | 833 | struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
e089f05c | 834 | struct btrfs_root *root); |
dee26a9f CM |
835 | int btrfs_alloc_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
836 | *root, u64 num_blocks, u64 search_start, u64 | |
837 | search_end, u64 owner, struct btrfs_key *ins); | |
e089f05c | 838 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
e20d96d6 | 839 | struct buffer_head *buf); |
e089f05c CM |
840 | int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
841 | *root, u64 blocknr, u64 num_blocks, int pin); | |
dee26a9f CM |
842 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct |
843 | btrfs_root *root); | |
844 | /* ctree.c */ | |
e089f05c CM |
845 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
846 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
847 | ins_len, int cow); | |
234b63a0 CM |
848 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
849 | void btrfs_init_path(struct btrfs_path *p); | |
e089f05c CM |
850 | int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
851 | struct btrfs_path *path); | |
852 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root | |
853 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
854 | int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root | |
855 | *root, struct btrfs_path *path, struct btrfs_key | |
856 | *cpu_key, u32 data_size); | |
234b63a0 | 857 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
123abc88 | 858 | int btrfs_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf); |
e089f05c | 859 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
e20d96d6 | 860 | *root, struct buffer_head *snap); |
dee26a9f | 861 | /* root-item.c */ |
e089f05c CM |
862 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
863 | struct btrfs_key *key); | |
864 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
865 | *root, struct btrfs_key *key, struct btrfs_root_item | |
866 | *item); | |
867 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
868 | *root, struct btrfs_key *key, struct btrfs_root_item | |
869 | *item); | |
870 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct | |
871 | btrfs_root_item *item, struct btrfs_key *key); | |
dee26a9f | 872 | /* dir-item.c */ |
e089f05c | 873 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
d5719762 | 874 | *root, const char *name, int name_len, u64 dir, u64 |
e089f05c CM |
875 | objectid, u8 type); |
876 | int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root | |
e20d96d6 CM |
877 | *root, struct btrfs_path *path, u64 dir, |
878 | const char *name, int name_len, int mod); | |
1d4f6404 | 879 | int btrfs_match_dir_item_name(struct btrfs_root *root, struct btrfs_path *path, |
7f5c1516 | 880 | const char *name, int name_len); |
dee26a9f | 881 | /* inode-map.c */ |
9f5fae2f CM |
882 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
883 | struct btrfs_root *fs_root, | |
884 | u64 dirid, u64 *objectid); | |
885 | int btrfs_insert_inode_map(struct btrfs_trans_handle *trans, | |
886 | struct btrfs_root *root, | |
887 | u64 objectid, struct btrfs_key *location); | |
888 | int btrfs_lookup_inode_map(struct btrfs_trans_handle *trans, | |
889 | struct btrfs_root *root, struct btrfs_path *path, | |
890 | u64 objectid, int mod); | |
dee26a9f | 891 | /* inode-item.c */ |
293ffd5f CM |
892 | int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
893 | *root, u64 objectid, struct btrfs_inode_item | |
894 | *inode_item); | |
895 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root | |
896 | *root, struct btrfs_path *path, u64 objectid, int mod); | |
dee26a9f CM |
897 | |
898 | /* file-item.c */ | |
899 | int btrfs_alloc_file_extent(struct btrfs_trans_handle *trans, | |
900 | struct btrfs_root *root, | |
901 | u64 objectid, u64 offset, | |
902 | u64 num_blocks, u64 hint_block, | |
903 | u64 *result); | |
904 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, | |
905 | struct btrfs_root *root, | |
906 | struct btrfs_path *path, u64 objectid, | |
9773a788 | 907 | u64 blocknr, int mod); |
eb60ceac | 908 | #endif |