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