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