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