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