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234b63a0 CM |
1 | #ifndef __BTRFS__ |
2 | #define __BTRFS__ | |
eb60ceac | 3 | |
e20d96d6 | 4 | #include <linux/fs.h> |
d6025579 | 5 | #include <linux/buffer_head.h> |
d6e4a428 | 6 | #include <linux/kobject.h> |
8ef97622 | 7 | #include "bit-radix.h" |
e20d96d6 | 8 | |
e089f05c | 9 | struct btrfs_trans_handle; |
79154b1b | 10 | struct btrfs_transaction; |
2c90e5d6 | 11 | extern struct kmem_cache *btrfs_path_cachep; |
e089f05c | 12 | |
3768f368 | 13 | #define BTRFS_MAGIC "_BtRfS_M" |
eb60ceac | 14 | |
6407bf6d | 15 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
0bd93ba0 CM |
16 | #define BTRFS_DEV_TREE_OBJECTID 2ULL |
17 | #define BTRFS_EXTENT_TREE_OBJECTID 3ULL | |
18 | #define BTRFS_FS_TREE_OBJECTID 4ULL | |
19 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 5ULL | |
20 | #define BTRFS_FIRST_FREE_OBJECTID 6ULL | |
3768f368 | 21 | |
e20d96d6 CM |
22 | /* |
23 | * we can actually store much bigger names, but lets not confuse the rest | |
24 | * of linux | |
25 | */ | |
26 | #define BTRFS_NAME_LEN 255 | |
27 | ||
f254e52c CM |
28 | /* 32 bytes in various csum fields */ |
29 | #define BTRFS_CSUM_SIZE 32 | |
30 | ||
fec577fb CM |
31 | /* |
32 | * the key defines the order in the tree, and so it also defines (optimal) | |
33 | * block layout. objectid corresonds to the inode number. The flags | |
34 | * tells us things about the object, and is a kind of stream selector. | |
35 | * so for a given inode, keys with flags of 1 might refer to the inode | |
36 | * data, flags of 2 may point to file data in the btree and flags == 3 | |
37 | * may point to extents. | |
38 | * | |
39 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
40 | * |
41 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
42 | * in cpu native order. Otherwise they are identical and their sizes | |
43 | * should be the same (ie both packed) | |
fec577fb | 44 | */ |
e2fa7227 CM |
45 | struct btrfs_disk_key { |
46 | __le64 objectid; | |
f254e52c | 47 | __le32 flags; |
70b2befd | 48 | __le64 offset; |
e2fa7227 CM |
49 | } __attribute__ ((__packed__)); |
50 | ||
51 | struct btrfs_key { | |
eb60ceac | 52 | u64 objectid; |
f254e52c | 53 | u32 flags; |
70b2befd | 54 | u64 offset; |
eb60ceac CM |
55 | } __attribute__ ((__packed__)); |
56 | ||
fec577fb CM |
57 | /* |
58 | * every tree block (leaf or node) starts with this header. | |
59 | */ | |
bb492bb0 | 60 | struct btrfs_header { |
f254e52c | 61 | u8 csum[BTRFS_CSUM_SIZE]; |
3768f368 | 62 | u8 fsid[16]; /* FS specific uuid */ |
bb492bb0 | 63 | __le64 blocknr; /* which block this node is supposed to live in */ |
7f5c1516 | 64 | __le64 generation; |
bb492bb0 CM |
65 | __le16 nritems; |
66 | __le16 flags; | |
9a6f11ed | 67 | u8 level; |
eb60ceac CM |
68 | } __attribute__ ((__packed__)); |
69 | ||
234b63a0 | 70 | #define BTRFS_MAX_LEVEL 8 |
123abc88 CM |
71 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \ |
72 | sizeof(struct btrfs_header)) / \ | |
73 | (sizeof(struct btrfs_disk_key) + sizeof(u64))) | |
74 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) | |
75 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize)) | |
236454df CM |
76 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
77 | sizeof(struct btrfs_item) - \ | |
78 | sizeof(struct btrfs_file_extent_item)) | |
eb60ceac | 79 | |
e20d96d6 | 80 | struct buffer_head; |
fec577fb CM |
81 | /* |
82 | * the super block basically lists the main trees of the FS | |
83 | * it currently lacks any block count etc etc | |
84 | */ | |
234b63a0 | 85 | struct btrfs_super_block { |
f254e52c | 86 | u8 csum[BTRFS_CSUM_SIZE]; |
87cbda5c | 87 | /* the first 3 fields must match struct btrfs_header */ |
3768f368 CM |
88 | u8 fsid[16]; /* FS specific uuid */ |
89 | __le64 blocknr; /* this block number */ | |
3768f368 | 90 | __le64 magic; |
123abc88 | 91 | __le32 blocksize; |
3768f368 CM |
92 | __le64 generation; |
93 | __le64 root; | |
94 | __le64 total_blocks; | |
95 | __le64 blocks_used; | |
2e635a27 | 96 | __le64 root_dir_objectid; |
b4100d64 | 97 | __le64 last_device_id; |
0bd93ba0 CM |
98 | /* fields below here vary with the underlying disk */ |
99 | __le64 device_block_start; | |
100 | __le64 device_num_blocks; | |
101 | __le64 device_root; | |
b4100d64 | 102 | __le64 device_id; |
cfaa7295 CM |
103 | } __attribute__ ((__packed__)); |
104 | ||
fec577fb | 105 | /* |
62e2749e | 106 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
107 | * the item in the leaf (relative to the start of the data area) |
108 | */ | |
0783fcfc | 109 | struct btrfs_item { |
e2fa7227 | 110 | struct btrfs_disk_key key; |
123abc88 | 111 | __le32 offset; |
0783fcfc | 112 | __le16 size; |
eb60ceac CM |
113 | } __attribute__ ((__packed__)); |
114 | ||
fec577fb CM |
115 | /* |
116 | * leaves have an item area and a data area: | |
117 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
118 | * | |
119 | * The data is separate from the items to get the keys closer together | |
120 | * during searches. | |
121 | */ | |
234b63a0 | 122 | struct btrfs_leaf { |
bb492bb0 | 123 | struct btrfs_header header; |
123abc88 | 124 | struct btrfs_item items[]; |
eb60ceac CM |
125 | } __attribute__ ((__packed__)); |
126 | ||
fec577fb CM |
127 | /* |
128 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
129 | * other blocks | |
130 | */ | |
123abc88 CM |
131 | struct btrfs_key_ptr { |
132 | struct btrfs_disk_key key; | |
133 | __le64 blockptr; | |
134 | } __attribute__ ((__packed__)); | |
135 | ||
234b63a0 | 136 | struct btrfs_node { |
bb492bb0 | 137 | struct btrfs_header header; |
123abc88 | 138 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
139 | } __attribute__ ((__packed__)); |
140 | ||
fec577fb | 141 | /* |
234b63a0 CM |
142 | * btrfs_paths remember the path taken from the root down to the leaf. |
143 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
144 | * to any other levels that are present. |
145 | * | |
146 | * The slots array records the index of the item or block pointer | |
147 | * used while walking the tree. | |
148 | */ | |
234b63a0 | 149 | struct btrfs_path { |
e20d96d6 | 150 | struct buffer_head *nodes[BTRFS_MAX_LEVEL]; |
234b63a0 | 151 | int slots[BTRFS_MAX_LEVEL]; |
eb60ceac | 152 | }; |
5de08d7d | 153 | |
62e2749e CM |
154 | /* |
155 | * items in the extent btree are used to record the objectid of the | |
156 | * owner of the block and the number of references | |
157 | */ | |
158 | struct btrfs_extent_item { | |
159 | __le32 refs; | |
62e2749e CM |
160 | } __attribute__ ((__packed__)); |
161 | ||
1e1d2701 | 162 | struct btrfs_inode_timespec { |
f254e52c | 163 | __le64 sec; |
1e1d2701 CM |
164 | __le32 nsec; |
165 | } __attribute__ ((__packed__)); | |
166 | ||
167 | /* | |
168 | * there is no padding here on purpose. If you want to extent the inode, | |
169 | * make a new item type | |
170 | */ | |
171 | struct btrfs_inode_item { | |
172 | __le64 generation; | |
173 | __le64 size; | |
174 | __le64 nblocks; | |
175 | __le32 nlink; | |
176 | __le32 uid; | |
177 | __le32 gid; | |
178 | __le32 mode; | |
179 | __le32 rdev; | |
180 | __le16 flags; | |
181 | __le16 compat_flags; | |
182 | struct btrfs_inode_timespec atime; | |
183 | struct btrfs_inode_timespec ctime; | |
184 | struct btrfs_inode_timespec mtime; | |
185 | struct btrfs_inode_timespec otime; | |
186 | } __attribute__ ((__packed__)); | |
187 | ||
188 | /* inline data is just a blob of bytes */ | |
189 | struct btrfs_inline_data_item { | |
190 | u8 data; | |
191 | } __attribute__ ((__packed__)); | |
192 | ||
62e2749e | 193 | struct btrfs_dir_item { |
d6e4a428 | 194 | struct btrfs_disk_key location; |
62e2749e | 195 | __le16 flags; |
a8a2ee0c | 196 | __le16 name_len; |
62e2749e CM |
197 | u8 type; |
198 | } __attribute__ ((__packed__)); | |
199 | ||
200 | struct btrfs_root_item { | |
d6e4a428 CM |
201 | struct btrfs_inode_item inode; |
202 | __le64 root_dirid; | |
62e2749e CM |
203 | __le64 blocknr; |
204 | __le32 flags; | |
205 | __le64 block_limit; | |
206 | __le64 blocks_used; | |
207 | __le32 refs; | |
9f5fae2f | 208 | } __attribute__ ((__packed__)); |
62e2749e | 209 | |
236454df CM |
210 | #define BTRFS_FILE_EXTENT_REG 0 |
211 | #define BTRFS_FILE_EXTENT_INLINE 1 | |
212 | ||
9f5fae2f | 213 | struct btrfs_file_extent_item { |
71951f35 | 214 | __le64 generation; |
236454df | 215 | u8 type; |
9f5fae2f CM |
216 | /* |
217 | * disk space consumed by the extent, checksum blocks are included | |
218 | * in these numbers | |
219 | */ | |
220 | __le64 disk_blocknr; | |
221 | __le64 disk_num_blocks; | |
222 | /* | |
dee26a9f | 223 | * the logical offset in file blocks (no csums) |
9f5fae2f CM |
224 | * this extent record is for. This allows a file extent to point |
225 | * into the middle of an existing extent on disk, sharing it | |
226 | * between two snapshots (useful if some bytes in the middle of the | |
227 | * extent have changed | |
228 | */ | |
229 | __le64 offset; | |
230 | /* | |
231 | * the logical number of file blocks (no csums included) | |
232 | */ | |
233 | __le64 num_blocks; | |
234 | } __attribute__ ((__packed__)); | |
235 | ||
f254e52c CM |
236 | struct btrfs_csum_item { |
237 | u8 csum[BTRFS_CSUM_SIZE]; | |
238 | } __attribute__ ((__packed__)); | |
239 | ||
0bd93ba0 CM |
240 | struct btrfs_device_item { |
241 | __le16 pathlen; | |
b4100d64 | 242 | __le64 device_id; |
0bd93ba0 CM |
243 | } __attribute__ ((__packed__)); |
244 | ||
87cbda5c | 245 | struct crypto_hash; |
9f5fae2f | 246 | struct btrfs_fs_info { |
62e2749e CM |
247 | struct btrfs_root *extent_root; |
248 | struct btrfs_root *tree_root; | |
0bd93ba0 | 249 | struct btrfs_root *dev_root; |
62e2749e CM |
250 | struct btrfs_key current_insert; |
251 | struct btrfs_key last_insert; | |
0f7d52f4 | 252 | struct radix_tree_root fs_roots_radix; |
8ef97622 | 253 | struct radix_tree_root pending_del_radix; |
62e2749e | 254 | struct radix_tree_root pinned_radix; |
7eccb903 | 255 | struct radix_tree_root dev_radix; |
293ffd5f | 256 | u64 generation; |
79154b1b | 257 | struct btrfs_transaction *running_transaction; |
1261ec42 | 258 | struct btrfs_super_block *disk_super; |
e20d96d6 CM |
259 | struct buffer_head *sb_buffer; |
260 | struct super_block *sb; | |
d98237b3 | 261 | struct inode *btree_inode; |
79154b1b | 262 | struct mutex trans_mutex; |
d561c025 | 263 | struct mutex fs_mutex; |
87cbda5c CM |
264 | struct crypto_hash *hash_tfm; |
265 | spinlock_t hash_lock; | |
d6e4a428 | 266 | struct kobject kobj; |
9f5fae2f CM |
267 | }; |
268 | ||
269 | /* | |
270 | * in ram representation of the tree. extent_root is used for all allocations | |
271 | * and for the extent tree extent_root root. current_insert is used | |
272 | * only for the extent tree. | |
273 | */ | |
274 | struct btrfs_root { | |
e20d96d6 CM |
275 | struct buffer_head *node; |
276 | struct buffer_head *commit_root; | |
62e2749e CM |
277 | struct btrfs_root_item root_item; |
278 | struct btrfs_key root_key; | |
9f5fae2f | 279 | struct btrfs_fs_info *fs_info; |
0f7d52f4 CM |
280 | struct inode *inode; |
281 | u64 objectid; | |
282 | u64 last_trans; | |
62e2749e | 283 | u32 blocksize; |
9f5fae2f CM |
284 | int ref_cows; |
285 | u32 type; | |
1b05da2e CM |
286 | u64 highest_inode; |
287 | u64 last_inode_alloc; | |
62e2749e CM |
288 | }; |
289 | ||
62e2749e CM |
290 | /* the lower bits in the key flags defines the item type */ |
291 | #define BTRFS_KEY_TYPE_MAX 256 | |
a429e513 CM |
292 | #define BTRFS_KEY_TYPE_SHIFT 24 |
293 | #define BTRFS_KEY_TYPE_MASK (((u32)BTRFS_KEY_TYPE_MAX - 1) << \ | |
294 | BTRFS_KEY_TYPE_SHIFT) | |
1e1d2701 | 295 | |
7fcde0e3 | 296 | #define BTRFS_KEY_OVERFLOW_MAX 128 |
a429e513 | 297 | #define BTRFS_KEY_OVERFLOW_MASK ((u32)BTRFS_KEY_OVERFLOW_MAX - 1) |
7fcde0e3 | 298 | |
1e1d2701 CM |
299 | /* |
300 | * inode items have the data typically returned from stat and store other | |
301 | * info about object characteristics. There is one for every file and dir in | |
302 | * the FS | |
303 | */ | |
62e2749e | 304 | #define BTRFS_INODE_ITEM_KEY 1 |
1e1d2701 CM |
305 | |
306 | /* | |
307 | * dir items are the name -> inode pointers in a directory. There is one | |
308 | * for every name in a directory. | |
309 | */ | |
62e2749e | 310 | #define BTRFS_DIR_ITEM_KEY 2 |
bae45de0 | 311 | #define BTRFS_DIR_INDEX_KEY 3 |
1e1d2701 CM |
312 | /* |
313 | * inline data is file data that fits in the btree. | |
314 | */ | |
bae45de0 | 315 | #define BTRFS_INLINE_DATA_KEY 4 |
1e1d2701 CM |
316 | /* |
317 | * extent data is for data that can't fit in the btree. It points to | |
318 | * a (hopefully) huge chunk of disk | |
319 | */ | |
bae45de0 | 320 | #define BTRFS_EXTENT_DATA_KEY 5 |
f254e52c CM |
321 | /* |
322 | * csum items have the checksums for data in the extents | |
323 | */ | |
bae45de0 | 324 | #define BTRFS_CSUM_ITEM_KEY 6 |
f254e52c | 325 | |
1e1d2701 CM |
326 | /* |
327 | * root items point to tree roots. There are typically in the root | |
328 | * tree used by the super block to find all the other trees | |
329 | */ | |
bae45de0 | 330 | #define BTRFS_ROOT_ITEM_KEY 7 |
1e1d2701 CM |
331 | /* |
332 | * extent items are in the extent map tree. These record which blocks | |
333 | * are used, and how many references there are to each block | |
334 | */ | |
bae45de0 | 335 | #define BTRFS_EXTENT_ITEM_KEY 8 |
9f5fae2f | 336 | |
0bd93ba0 CM |
337 | /* |
338 | * dev items list the devices that make up the FS | |
339 | */ | |
340 | #define BTRFS_DEV_ITEM_KEY 9 | |
341 | ||
1e1d2701 CM |
342 | /* |
343 | * string items are for debugging. They just store a short string of | |
344 | * data in the FS | |
345 | */ | |
0bd93ba0 | 346 | #define BTRFS_STRING_ITEM_KEY 10 |
1e1d2701 CM |
347 | |
348 | static inline u64 btrfs_inode_generation(struct btrfs_inode_item *i) | |
349 | { | |
350 | return le64_to_cpu(i->generation); | |
351 | } | |
352 | ||
353 | static inline void btrfs_set_inode_generation(struct btrfs_inode_item *i, | |
354 | u64 val) | |
355 | { | |
356 | i->generation = cpu_to_le64(val); | |
357 | } | |
358 | ||
359 | static inline u64 btrfs_inode_size(struct btrfs_inode_item *i) | |
360 | { | |
361 | return le64_to_cpu(i->size); | |
362 | } | |
363 | ||
364 | static inline void btrfs_set_inode_size(struct btrfs_inode_item *i, u64 val) | |
365 | { | |
366 | i->size = cpu_to_le64(val); | |
367 | } | |
368 | ||
369 | static inline u64 btrfs_inode_nblocks(struct btrfs_inode_item *i) | |
370 | { | |
371 | return le64_to_cpu(i->nblocks); | |
372 | } | |
373 | ||
374 | static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item *i, u64 val) | |
375 | { | |
376 | i->nblocks = cpu_to_le64(val); | |
377 | } | |
378 | ||
379 | static inline u32 btrfs_inode_nlink(struct btrfs_inode_item *i) | |
380 | { | |
381 | return le32_to_cpu(i->nlink); | |
382 | } | |
383 | ||
384 | static inline void btrfs_set_inode_nlink(struct btrfs_inode_item *i, u32 val) | |
385 | { | |
386 | i->nlink = cpu_to_le32(val); | |
387 | } | |
388 | ||
389 | static inline u32 btrfs_inode_uid(struct btrfs_inode_item *i) | |
390 | { | |
391 | return le32_to_cpu(i->uid); | |
392 | } | |
393 | ||
394 | static inline void btrfs_set_inode_uid(struct btrfs_inode_item *i, u32 val) | |
395 | { | |
396 | i->uid = cpu_to_le32(val); | |
397 | } | |
398 | ||
399 | static inline u32 btrfs_inode_gid(struct btrfs_inode_item *i) | |
400 | { | |
401 | return le32_to_cpu(i->gid); | |
402 | } | |
403 | ||
404 | static inline void btrfs_set_inode_gid(struct btrfs_inode_item *i, u32 val) | |
405 | { | |
406 | i->gid = cpu_to_le32(val); | |
407 | } | |
408 | ||
409 | static inline u32 btrfs_inode_mode(struct btrfs_inode_item *i) | |
410 | { | |
411 | return le32_to_cpu(i->mode); | |
412 | } | |
413 | ||
414 | static inline void btrfs_set_inode_mode(struct btrfs_inode_item *i, u32 val) | |
415 | { | |
416 | i->mode = cpu_to_le32(val); | |
417 | } | |
418 | ||
419 | static inline u32 btrfs_inode_rdev(struct btrfs_inode_item *i) | |
420 | { | |
421 | return le32_to_cpu(i->rdev); | |
422 | } | |
423 | ||
424 | static inline void btrfs_set_inode_rdev(struct btrfs_inode_item *i, u32 val) | |
425 | { | |
426 | i->rdev = cpu_to_le32(val); | |
427 | } | |
428 | ||
429 | static inline u16 btrfs_inode_flags(struct btrfs_inode_item *i) | |
430 | { | |
431 | return le16_to_cpu(i->flags); | |
432 | } | |
433 | ||
434 | static inline void btrfs_set_inode_flags(struct btrfs_inode_item *i, u16 val) | |
435 | { | |
436 | i->flags = cpu_to_le16(val); | |
437 | } | |
438 | ||
439 | static inline u16 btrfs_inode_compat_flags(struct btrfs_inode_item *i) | |
440 | { | |
441 | return le16_to_cpu(i->compat_flags); | |
442 | } | |
443 | ||
444 | static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item *i, | |
445 | u16 val) | |
446 | { | |
447 | i->compat_flags = cpu_to_le16(val); | |
448 | } | |
449 | ||
f254e52c | 450 | static inline u64 btrfs_timespec_sec(struct btrfs_inode_timespec *ts) |
e20d96d6 | 451 | { |
f254e52c | 452 | return le64_to_cpu(ts->sec); |
e20d96d6 CM |
453 | } |
454 | ||
455 | static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec *ts, | |
f254e52c | 456 | u64 val) |
e20d96d6 | 457 | { |
f254e52c | 458 | ts->sec = cpu_to_le64(val); |
e20d96d6 CM |
459 | } |
460 | ||
461 | static inline u32 btrfs_timespec_nsec(struct btrfs_inode_timespec *ts) | |
462 | { | |
463 | return le32_to_cpu(ts->nsec); | |
464 | } | |
465 | ||
466 | static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec *ts, | |
467 | u32 val) | |
468 | { | |
469 | ts->nsec = cpu_to_le32(val); | |
470 | } | |
471 | ||
234b63a0 | 472 | static inline u32 btrfs_extent_refs(struct btrfs_extent_item *ei) |
cf27e1ee CM |
473 | { |
474 | return le32_to_cpu(ei->refs); | |
475 | } | |
476 | ||
234b63a0 | 477 | static inline void btrfs_set_extent_refs(struct btrfs_extent_item *ei, u32 val) |
cf27e1ee CM |
478 | { |
479 | ei->refs = cpu_to_le32(val); | |
480 | } | |
481 | ||
234b63a0 | 482 | static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr) |
1d4f8a0c | 483 | { |
123abc88 | 484 | return le64_to_cpu(n->ptrs[nr].blockptr); |
1d4f8a0c CM |
485 | } |
486 | ||
234b63a0 CM |
487 | static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr, |
488 | u64 val) | |
1d4f8a0c | 489 | { |
123abc88 | 490 | n->ptrs[nr].blockptr = cpu_to_le64(val); |
1d4f8a0c CM |
491 | } |
492 | ||
123abc88 | 493 | static inline u32 btrfs_item_offset(struct btrfs_item *item) |
0783fcfc | 494 | { |
123abc88 | 495 | return le32_to_cpu(item->offset); |
0783fcfc CM |
496 | } |
497 | ||
123abc88 | 498 | static inline void btrfs_set_item_offset(struct btrfs_item *item, u32 val) |
0783fcfc | 499 | { |
123abc88 | 500 | item->offset = cpu_to_le32(val); |
0783fcfc CM |
501 | } |
502 | ||
123abc88 | 503 | static inline u32 btrfs_item_end(struct btrfs_item *item) |
0783fcfc | 504 | { |
123abc88 | 505 | return le32_to_cpu(item->offset) + le16_to_cpu(item->size); |
0783fcfc CM |
506 | } |
507 | ||
508 | static inline u16 btrfs_item_size(struct btrfs_item *item) | |
509 | { | |
510 | return le16_to_cpu(item->size); | |
511 | } | |
512 | ||
513 | static inline void btrfs_set_item_size(struct btrfs_item *item, u16 val) | |
514 | { | |
515 | item->size = cpu_to_le16(val); | |
516 | } | |
517 | ||
1d4f6404 CM |
518 | static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d) |
519 | { | |
520 | return le16_to_cpu(d->flags); | |
521 | } | |
522 | ||
523 | static inline void btrfs_set_dir_flags(struct btrfs_dir_item *d, u16 val) | |
524 | { | |
525 | d->flags = cpu_to_le16(val); | |
526 | } | |
527 | ||
528 | static inline u8 btrfs_dir_type(struct btrfs_dir_item *d) | |
529 | { | |
530 | return d->type; | |
531 | } | |
532 | ||
533 | static inline void btrfs_set_dir_type(struct btrfs_dir_item *d, u8 val) | |
534 | { | |
535 | d->type = val; | |
536 | } | |
537 | ||
a8a2ee0c CM |
538 | static inline u16 btrfs_dir_name_len(struct btrfs_dir_item *d) |
539 | { | |
540 | return le16_to_cpu(d->name_len); | |
541 | } | |
542 | ||
543 | static inline void btrfs_set_dir_name_len(struct btrfs_dir_item *d, u16 val) | |
1d4f6404 | 544 | { |
a8a2ee0c | 545 | d->name_len = cpu_to_le16(val); |
1d4f6404 CM |
546 | } |
547 | ||
e2fa7227 CM |
548 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
549 | struct btrfs_disk_key *disk) | |
550 | { | |
551 | cpu->offset = le64_to_cpu(disk->offset); | |
552 | cpu->flags = le32_to_cpu(disk->flags); | |
553 | cpu->objectid = le64_to_cpu(disk->objectid); | |
554 | } | |
555 | ||
556 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
557 | struct btrfs_key *cpu) | |
558 | { | |
559 | disk->offset = cpu_to_le64(cpu->offset); | |
560 | disk->flags = cpu_to_le32(cpu->flags); | |
561 | disk->objectid = cpu_to_le64(cpu->objectid); | |
562 | } | |
563 | ||
62e2749e | 564 | static inline u64 btrfs_disk_key_objectid(struct btrfs_disk_key *disk) |
e2fa7227 CM |
565 | { |
566 | return le64_to_cpu(disk->objectid); | |
567 | } | |
568 | ||
62e2749e CM |
569 | static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key *disk, |
570 | u64 val) | |
e2fa7227 CM |
571 | { |
572 | disk->objectid = cpu_to_le64(val); | |
573 | } | |
574 | ||
62e2749e | 575 | static inline u64 btrfs_disk_key_offset(struct btrfs_disk_key *disk) |
e2fa7227 CM |
576 | { |
577 | return le64_to_cpu(disk->offset); | |
578 | } | |
579 | ||
62e2749e CM |
580 | static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key *disk, |
581 | u64 val) | |
e2fa7227 CM |
582 | { |
583 | disk->offset = cpu_to_le64(val); | |
584 | } | |
585 | ||
62e2749e | 586 | static inline u32 btrfs_disk_key_flags(struct btrfs_disk_key *disk) |
e2fa7227 CM |
587 | { |
588 | return le32_to_cpu(disk->flags); | |
589 | } | |
590 | ||
62e2749e CM |
591 | static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key *disk, |
592 | u32 val) | |
e2fa7227 CM |
593 | { |
594 | disk->flags = cpu_to_le32(val); | |
595 | } | |
596 | ||
a429e513 | 597 | static inline u32 btrfs_disk_key_type(struct btrfs_disk_key *key) |
7fcde0e3 | 598 | { |
a429e513 | 599 | return le32_to_cpu(key->flags) >> BTRFS_KEY_TYPE_SHIFT; |
7fcde0e3 CM |
600 | } |
601 | ||
a429e513 CM |
602 | static inline void btrfs_set_disk_key_type(struct btrfs_disk_key *key, |
603 | u32 val) | |
7fcde0e3 | 604 | { |
a429e513 CM |
605 | u32 flags = btrfs_disk_key_flags(key); |
606 | BUG_ON(val >= BTRFS_KEY_TYPE_MAX); | |
607 | val = val << BTRFS_KEY_TYPE_SHIFT; | |
608 | flags = (flags & ~BTRFS_KEY_TYPE_MASK) | val; | |
609 | btrfs_set_disk_key_flags(key, flags); | |
7fcde0e3 CM |
610 | } |
611 | ||
62e2749e CM |
612 | static inline u32 btrfs_key_type(struct btrfs_key *key) |
613 | { | |
a429e513 | 614 | return key->flags >> BTRFS_KEY_TYPE_SHIFT; |
62e2749e CM |
615 | } |
616 | ||
a429e513 | 617 | static inline void btrfs_set_key_type(struct btrfs_key *key, u32 val) |
62e2749e | 618 | { |
a429e513 CM |
619 | BUG_ON(val >= BTRFS_KEY_TYPE_MAX); |
620 | val = val << BTRFS_KEY_TYPE_SHIFT; | |
621 | key->flags = (key->flags & ~(BTRFS_KEY_TYPE_MASK)) | val; | |
62e2749e CM |
622 | } |
623 | ||
a429e513 | 624 | static inline u32 btrfs_key_overflow(struct btrfs_key *key) |
62e2749e | 625 | { |
a429e513 | 626 | return key->flags & BTRFS_KEY_OVERFLOW_MASK; |
62e2749e CM |
627 | } |
628 | ||
a429e513 | 629 | static inline void btrfs_set_key_overflow(struct btrfs_key *key, u32 over) |
62e2749e | 630 | { |
a429e513 CM |
631 | BUG_ON(over >= BTRFS_KEY_OVERFLOW_MAX); |
632 | key->flags = (key->flags & ~BTRFS_KEY_OVERFLOW_MASK) | over; | |
7fcde0e3 CM |
633 | } |
634 | ||
635 | static inline u32 btrfs_disk_key_overflow(struct btrfs_disk_key *key) | |
636 | { | |
a429e513 | 637 | return le32_to_cpu(key->flags) & BTRFS_KEY_OVERFLOW_MASK; |
7fcde0e3 CM |
638 | } |
639 | ||
a429e513 | 640 | static inline void btrfs_set_disk_key_overflow(struct btrfs_disk_key *key, |
7fcde0e3 CM |
641 | u32 over) |
642 | { | |
643 | u32 flags = btrfs_disk_key_flags(key); | |
0f7d52f4 | 644 | BUG_ON(over >= BTRFS_KEY_OVERFLOW_MAX); |
a429e513 | 645 | flags = (flags & ~BTRFS_KEY_OVERFLOW_MASK) | over; |
7fcde0e3 | 646 | btrfs_set_disk_key_flags(key, flags); |
62e2749e CM |
647 | } |
648 | ||
bb492bb0 | 649 | static inline u64 btrfs_header_blocknr(struct btrfs_header *h) |
7518a238 | 650 | { |
bb492bb0 | 651 | return le64_to_cpu(h->blocknr); |
7518a238 CM |
652 | } |
653 | ||
bb492bb0 | 654 | static inline void btrfs_set_header_blocknr(struct btrfs_header *h, u64 blocknr) |
7518a238 | 655 | { |
bb492bb0 | 656 | h->blocknr = cpu_to_le64(blocknr); |
7518a238 CM |
657 | } |
658 | ||
7f5c1516 CM |
659 | static inline u64 btrfs_header_generation(struct btrfs_header *h) |
660 | { | |
661 | return le64_to_cpu(h->generation); | |
662 | } | |
663 | ||
664 | static inline void btrfs_set_header_generation(struct btrfs_header *h, | |
665 | u64 val) | |
666 | { | |
667 | h->generation = cpu_to_le64(val); | |
668 | } | |
669 | ||
bb492bb0 | 670 | static inline u16 btrfs_header_nritems(struct btrfs_header *h) |
7518a238 | 671 | { |
bb492bb0 | 672 | return le16_to_cpu(h->nritems); |
7518a238 CM |
673 | } |
674 | ||
bb492bb0 | 675 | static inline void btrfs_set_header_nritems(struct btrfs_header *h, u16 val) |
7518a238 | 676 | { |
bb492bb0 | 677 | h->nritems = cpu_to_le16(val); |
7518a238 CM |
678 | } |
679 | ||
bb492bb0 | 680 | static inline u16 btrfs_header_flags(struct btrfs_header *h) |
7518a238 | 681 | { |
bb492bb0 | 682 | return le16_to_cpu(h->flags); |
7518a238 CM |
683 | } |
684 | ||
bb492bb0 | 685 | static inline void btrfs_set_header_flags(struct btrfs_header *h, u16 val) |
7518a238 | 686 | { |
bb492bb0 | 687 | h->flags = cpu_to_le16(val); |
7518a238 CM |
688 | } |
689 | ||
bb492bb0 | 690 | static inline int btrfs_header_level(struct btrfs_header *h) |
7518a238 | 691 | { |
9a6f11ed | 692 | return h->level; |
7518a238 CM |
693 | } |
694 | ||
bb492bb0 | 695 | static inline void btrfs_set_header_level(struct btrfs_header *h, int level) |
7518a238 | 696 | { |
234b63a0 | 697 | BUG_ON(level > BTRFS_MAX_LEVEL); |
9a6f11ed | 698 | h->level = level; |
7518a238 CM |
699 | } |
700 | ||
234b63a0 | 701 | static inline int btrfs_is_leaf(struct btrfs_node *n) |
7518a238 CM |
702 | { |
703 | return (btrfs_header_level(&n->header) == 0); | |
704 | } | |
705 | ||
3768f368 CM |
706 | static inline u64 btrfs_root_blocknr(struct btrfs_root_item *item) |
707 | { | |
708 | return le64_to_cpu(item->blocknr); | |
709 | } | |
710 | ||
711 | static inline void btrfs_set_root_blocknr(struct btrfs_root_item *item, u64 val) | |
712 | { | |
713 | item->blocknr = cpu_to_le64(val); | |
714 | } | |
715 | ||
d6e4a428 CM |
716 | static inline u64 btrfs_root_dirid(struct btrfs_root_item *item) |
717 | { | |
718 | return le64_to_cpu(item->root_dirid); | |
719 | } | |
720 | ||
721 | static inline void btrfs_set_root_dirid(struct btrfs_root_item *item, u64 val) | |
722 | { | |
723 | item->root_dirid = cpu_to_le64(val); | |
724 | } | |
725 | ||
3768f368 CM |
726 | static inline u32 btrfs_root_refs(struct btrfs_root_item *item) |
727 | { | |
728 | return le32_to_cpu(item->refs); | |
729 | } | |
730 | ||
731 | static inline void btrfs_set_root_refs(struct btrfs_root_item *item, u32 val) | |
732 | { | |
733 | item->refs = cpu_to_le32(val); | |
734 | } | |
735 | ||
736 | static inline u64 btrfs_super_blocknr(struct btrfs_super_block *s) | |
737 | { | |
738 | return le64_to_cpu(s->blocknr); | |
739 | } | |
740 | ||
741 | static inline void btrfs_set_super_blocknr(struct btrfs_super_block *s, u64 val) | |
742 | { | |
743 | s->blocknr = cpu_to_le64(val); | |
744 | } | |
745 | ||
0f7d52f4 CM |
746 | static inline u64 btrfs_super_generation(struct btrfs_super_block *s) |
747 | { | |
748 | return le64_to_cpu(s->generation); | |
749 | } | |
750 | ||
751 | static inline void btrfs_set_super_generation(struct btrfs_super_block *s, | |
752 | u64 val) | |
753 | { | |
754 | s->generation = cpu_to_le64(val); | |
755 | } | |
756 | ||
3768f368 CM |
757 | static inline u64 btrfs_super_root(struct btrfs_super_block *s) |
758 | { | |
759 | return le64_to_cpu(s->root); | |
760 | } | |
761 | ||
762 | static inline void btrfs_set_super_root(struct btrfs_super_block *s, u64 val) | |
763 | { | |
764 | s->root = cpu_to_le64(val); | |
765 | } | |
766 | ||
767 | static inline u64 btrfs_super_total_blocks(struct btrfs_super_block *s) | |
768 | { | |
769 | return le64_to_cpu(s->total_blocks); | |
770 | } | |
771 | ||
772 | static inline void btrfs_set_super_total_blocks(struct btrfs_super_block *s, | |
773 | u64 val) | |
774 | { | |
775 | s->total_blocks = cpu_to_le64(val); | |
776 | } | |
777 | ||
778 | static inline u64 btrfs_super_blocks_used(struct btrfs_super_block *s) | |
779 | { | |
780 | return le64_to_cpu(s->blocks_used); | |
781 | } | |
782 | ||
783 | static inline void btrfs_set_super_blocks_used(struct btrfs_super_block *s, | |
784 | u64 val) | |
785 | { | |
786 | s->blocks_used = cpu_to_le64(val); | |
787 | } | |
788 | ||
123abc88 | 789 | static inline u32 btrfs_super_blocksize(struct btrfs_super_block *s) |
3768f368 | 790 | { |
123abc88 | 791 | return le32_to_cpu(s->blocksize); |
3768f368 CM |
792 | } |
793 | ||
794 | static inline void btrfs_set_super_blocksize(struct btrfs_super_block *s, | |
123abc88 CM |
795 | u32 val) |
796 | { | |
797 | s->blocksize = cpu_to_le32(val); | |
798 | } | |
799 | ||
2e635a27 CM |
800 | static inline u64 btrfs_super_root_dir(struct btrfs_super_block *s) |
801 | { | |
802 | return le64_to_cpu(s->root_dir_objectid); | |
803 | } | |
804 | ||
805 | static inline void btrfs_set_super_root_dir(struct btrfs_super_block *s, u64 | |
806 | val) | |
807 | { | |
808 | s->root_dir_objectid = cpu_to_le64(val); | |
809 | } | |
810 | ||
b4100d64 CM |
811 | static inline u64 btrfs_super_last_device_id(struct btrfs_super_block *s) |
812 | { | |
813 | return le64_to_cpu(s->last_device_id); | |
814 | } | |
815 | ||
816 | static inline void btrfs_set_super_last_device_id(struct btrfs_super_block *s, | |
817 | u64 val) | |
818 | { | |
819 | s->last_device_id = cpu_to_le64(val); | |
820 | } | |
821 | ||
822 | static inline u64 btrfs_super_device_id(struct btrfs_super_block *s) | |
823 | { | |
824 | return le64_to_cpu(s->device_id); | |
825 | } | |
826 | ||
827 | static inline void btrfs_set_super_device_id(struct btrfs_super_block *s, | |
828 | u64 val) | |
829 | { | |
830 | s->device_id = cpu_to_le64(val); | |
831 | } | |
832 | ||
0bd93ba0 CM |
833 | static inline u64 btrfs_super_device_block_start(struct btrfs_super_block *s) |
834 | { | |
835 | return le64_to_cpu(s->device_block_start); | |
836 | } | |
837 | ||
838 | static inline void btrfs_set_super_device_block_start(struct btrfs_super_block | |
839 | *s, u64 val) | |
840 | { | |
841 | s->device_block_start = cpu_to_le64(val); | |
842 | } | |
843 | ||
844 | static inline u64 btrfs_super_device_num_blocks(struct btrfs_super_block *s) | |
845 | { | |
846 | return le64_to_cpu(s->device_num_blocks); | |
847 | } | |
848 | ||
849 | static inline void btrfs_set_super_device_num_blocks(struct btrfs_super_block | |
850 | *s, u64 val) | |
851 | { | |
852 | s->device_num_blocks = cpu_to_le64(val); | |
853 | } | |
854 | ||
855 | static inline u64 btrfs_super_device_root(struct btrfs_super_block *s) | |
856 | { | |
857 | return le64_to_cpu(s->device_root); | |
858 | } | |
859 | ||
860 | static inline void btrfs_set_super_device_root(struct btrfs_super_block | |
861 | *s, u64 val) | |
862 | { | |
863 | s->device_root = cpu_to_le64(val); | |
864 | } | |
865 | ||
866 | ||
123abc88 | 867 | static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l) |
3768f368 | 868 | { |
123abc88 | 869 | return (u8 *)l->items; |
3768f368 | 870 | } |
9f5fae2f | 871 | |
236454df CM |
872 | static inline int btrfs_file_extent_type(struct btrfs_file_extent_item *e) |
873 | { | |
874 | return e->type; | |
875 | } | |
876 | static inline void btrfs_set_file_extent_type(struct btrfs_file_extent_item *e, | |
877 | u8 val) | |
878 | { | |
879 | e->type = val; | |
880 | } | |
881 | ||
882 | static inline char *btrfs_file_extent_inline_start(struct | |
883 | btrfs_file_extent_item *e) | |
884 | { | |
885 | return (char *)(&e->disk_blocknr); | |
886 | } | |
887 | ||
888 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
889 | { | |
890 | return (unsigned long)(&((struct | |
891 | btrfs_file_extent_item *)NULL)->disk_blocknr) + datasize; | |
892 | } | |
893 | ||
894 | static inline u32 btrfs_file_extent_inline_len(struct btrfs_item *e) | |
895 | { | |
896 | struct btrfs_file_extent_item *fe = NULL; | |
897 | return btrfs_item_size(e) - (unsigned long)(&fe->disk_blocknr); | |
898 | } | |
899 | ||
9f5fae2f CM |
900 | static inline u64 btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item |
901 | *e) | |
902 | { | |
903 | return le64_to_cpu(e->disk_blocknr); | |
904 | } | |
905 | ||
906 | static inline void btrfs_set_file_extent_disk_blocknr(struct | |
907 | btrfs_file_extent_item | |
908 | *e, u64 val) | |
909 | { | |
910 | e->disk_blocknr = cpu_to_le64(val); | |
911 | } | |
912 | ||
71951f35 CM |
913 | static inline u64 btrfs_file_extent_generation(struct btrfs_file_extent_item *e) |
914 | { | |
915 | return le64_to_cpu(e->generation); | |
916 | } | |
917 | ||
918 | static inline void btrfs_set_file_extent_generation(struct | |
919 | btrfs_file_extent_item *e, | |
920 | u64 val) | |
921 | { | |
922 | e->generation = cpu_to_le64(val); | |
923 | } | |
924 | ||
9f5fae2f CM |
925 | static inline u64 btrfs_file_extent_disk_num_blocks(struct |
926 | btrfs_file_extent_item *e) | |
927 | { | |
928 | return le64_to_cpu(e->disk_num_blocks); | |
929 | } | |
930 | ||
931 | static inline void btrfs_set_file_extent_disk_num_blocks(struct | |
932 | btrfs_file_extent_item | |
933 | *e, u64 val) | |
934 | { | |
935 | e->disk_num_blocks = cpu_to_le64(val); | |
936 | } | |
937 | ||
938 | static inline u64 btrfs_file_extent_offset(struct btrfs_file_extent_item *e) | |
939 | { | |
940 | return le64_to_cpu(e->offset); | |
941 | } | |
942 | ||
943 | static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item | |
944 | *e, u64 val) | |
945 | { | |
946 | e->offset = cpu_to_le64(val); | |
947 | } | |
948 | ||
949 | static inline u64 btrfs_file_extent_num_blocks(struct btrfs_file_extent_item | |
950 | *e) | |
951 | { | |
952 | return le64_to_cpu(e->num_blocks); | |
953 | } | |
954 | ||
955 | static inline void btrfs_set_file_extent_num_blocks(struct | |
956 | btrfs_file_extent_item *e, | |
957 | u64 val) | |
958 | { | |
959 | e->num_blocks = cpu_to_le64(val); | |
960 | } | |
961 | ||
0bd93ba0 CM |
962 | static inline u16 btrfs_device_pathlen(struct btrfs_device_item *d) |
963 | { | |
964 | return le16_to_cpu(d->pathlen); | |
965 | } | |
966 | ||
967 | static inline void btrfs_set_device_pathlen(struct btrfs_device_item *d, | |
968 | u16 val) | |
969 | { | |
970 | d->pathlen = cpu_to_le16(val); | |
971 | } | |
972 | ||
b4100d64 CM |
973 | static inline u64 btrfs_device_id(struct btrfs_device_item *d) |
974 | { | |
975 | return le64_to_cpu(d->device_id); | |
976 | } | |
977 | ||
978 | static inline void btrfs_set_device_id(struct btrfs_device_item *d, | |
979 | u64 val) | |
980 | { | |
981 | d->device_id = cpu_to_le64(val); | |
982 | } | |
983 | ||
e20d96d6 CM |
984 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
985 | { | |
986 | return sb->s_fs_info; | |
987 | } | |
988 | ||
d6025579 CM |
989 | static inline void btrfs_check_bounds(void *vptr, size_t len, |
990 | void *vcontainer, size_t container_len) | |
991 | { | |
992 | char *ptr = vptr; | |
993 | char *container = vcontainer; | |
994 | WARN_ON(ptr < container); | |
995 | WARN_ON(ptr + len > container + container_len); | |
996 | } | |
997 | ||
998 | static inline void btrfs_memcpy(struct btrfs_root *root, | |
999 | void *dst_block, | |
1000 | void *dst, const void *src, size_t nr) | |
1001 | { | |
1002 | btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize); | |
1003 | memcpy(dst, src, nr); | |
1004 | } | |
1005 | ||
1006 | static inline void btrfs_memmove(struct btrfs_root *root, | |
1007 | void *dst_block, | |
1008 | void *dst, void *src, size_t nr) | |
1009 | { | |
1010 | btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize); | |
1011 | memmove(dst, src, nr); | |
1012 | } | |
1013 | ||
1014 | static inline void btrfs_mark_buffer_dirty(struct buffer_head *bh) | |
1015 | { | |
1016 | WARN_ON(!atomic_read(&bh->b_count)); | |
1017 | mark_buffer_dirty(bh); | |
1018 | } | |
1019 | ||
4beb1b8b CM |
1020 | /* helper function to cast into the data area of the leaf. */ |
1021 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 CM |
1022 | ((type *)(btrfs_leaf_data(leaf) + \ |
1023 | btrfs_item_offset((leaf)->items + (slot)))) | |
4beb1b8b | 1024 | |
b18c6685 | 1025 | /* extent-tree.c */ |
c5739bba CM |
1026 | int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, |
1027 | struct btrfs_root *root); | |
e20d96d6 | 1028 | struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
e089f05c | 1029 | struct btrfs_root *root); |
dee26a9f CM |
1030 | int btrfs_alloc_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
1031 | *root, u64 num_blocks, u64 search_start, u64 | |
d0dbc624 | 1032 | search_end, struct btrfs_key *ins); |
e089f05c | 1033 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
e20d96d6 | 1034 | struct buffer_head *buf); |
e089f05c CM |
1035 | int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
1036 | *root, u64 blocknr, u64 num_blocks, int pin); | |
dee26a9f CM |
1037 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct |
1038 | btrfs_root *root); | |
b18c6685 CM |
1039 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
1040 | struct btrfs_root *root, | |
1041 | u64 blocknr, u64 num_blocks); | |
dee26a9f | 1042 | /* ctree.c */ |
6567e837 CM |
1043 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
1044 | *root, struct btrfs_path *path, u32 data_size); | |
b18c6685 CM |
1045 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
1046 | struct btrfs_root *root, | |
1047 | struct btrfs_path *path, | |
1048 | u32 new_size); | |
e089f05c CM |
1049 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
1050 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
1051 | ins_len, int cow); | |
234b63a0 | 1052 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
2c90e5d6 CM |
1053 | struct btrfs_path *btrfs_alloc_path(void); |
1054 | void btrfs_free_path(struct btrfs_path *p); | |
234b63a0 | 1055 | void btrfs_init_path(struct btrfs_path *p); |
e089f05c CM |
1056 | int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
1057 | struct btrfs_path *path); | |
1058 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root | |
1059 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
1060 | int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root | |
1061 | *root, struct btrfs_path *path, struct btrfs_key | |
1062 | *cpu_key, u32 data_size); | |
234b63a0 | 1063 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
123abc88 | 1064 | int btrfs_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf); |
e089f05c | 1065 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
e20d96d6 | 1066 | *root, struct buffer_head *snap); |
dee26a9f | 1067 | /* root-item.c */ |
e089f05c CM |
1068 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
1069 | struct btrfs_key *key); | |
1070 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
1071 | *root, struct btrfs_key *key, struct btrfs_root_item | |
1072 | *item); | |
1073 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
1074 | *root, struct btrfs_key *key, struct btrfs_root_item | |
1075 | *item); | |
1076 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct | |
1077 | btrfs_root_item *item, struct btrfs_key *key); | |
dee26a9f | 1078 | /* dir-item.c */ |
e089f05c | 1079 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
1080 | *root, const char *name, int name_len, u64 dir, |
1081 | struct btrfs_key *location, u8 type); | |
e089f05c | 1082 | int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
e20d96d6 CM |
1083 | *root, struct btrfs_path *path, u64 dir, |
1084 | const char *name, int name_len, int mod); | |
5f26f772 CM |
1085 | int btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, |
1086 | struct btrfs_root *root, | |
1087 | struct btrfs_path *path, u64 dir, | |
1088 | u64 objectid, int mod); | |
1d4f6404 | 1089 | int btrfs_match_dir_item_name(struct btrfs_root *root, struct btrfs_path *path, |
7f5c1516 | 1090 | const char *name, int name_len); |
dee26a9f | 1091 | /* inode-map.c */ |
9f5fae2f CM |
1092 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
1093 | struct btrfs_root *fs_root, | |
1094 | u64 dirid, u64 *objectid); | |
5be6f7f1 CM |
1095 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
1096 | ||
dee26a9f | 1097 | /* inode-item.c */ |
293ffd5f CM |
1098 | int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
1099 | *root, u64 objectid, struct btrfs_inode_item | |
1100 | *inode_item); | |
1101 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root | |
d6e4a428 CM |
1102 | *root, struct btrfs_path *path, |
1103 | struct btrfs_key *location, int mod); | |
dee26a9f CM |
1104 | |
1105 | /* file-item.c */ | |
b18c6685 | 1106 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
dee26a9f | 1107 | struct btrfs_root *root, |
b18c6685 CM |
1108 | u64 objectid, u64 pos, u64 offset, |
1109 | u64 num_blocks); | |
dee26a9f CM |
1110 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
1111 | struct btrfs_root *root, | |
1112 | struct btrfs_path *path, u64 objectid, | |
9773a788 | 1113 | u64 blocknr, int mod); |
f254e52c CM |
1114 | int btrfs_csum_file_block(struct btrfs_trans_handle *trans, |
1115 | struct btrfs_root *root, | |
1116 | u64 objectid, u64 offset, | |
1117 | char *data, size_t len); | |
1118 | int btrfs_csum_verify_file_block(struct btrfs_root *root, | |
1119 | u64 objectid, u64 offset, | |
1120 | char *data, size_t len); | |
b18c6685 CM |
1121 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
1122 | struct btrfs_root *root, | |
1123 | struct btrfs_path *path, | |
1124 | u64 objectid, u64 offset, | |
1125 | int cow); | |
d6e4a428 CM |
1126 | /* super.c */ |
1127 | extern struct subsystem btrfs_subsys; | |
1128 | ||
eb60ceac | 1129 | #endif |