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6cbd5570 CM |
1 | /* |
2 | * Copyright (C) 2007 Oracle. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public | |
6 | * License v2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public | |
14 | * License along with this program; if not, write to the | |
15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
16 | * Boston, MA 021110-1307, USA. | |
17 | */ | |
18 | ||
234b63a0 CM |
19 | #ifndef __BTRFS__ |
20 | #define __BTRFS__ | |
eb60ceac | 21 | |
e20d96d6 | 22 | #include <linux/fs.h> |
08607c1b | 23 | #include <linux/workqueue.h> |
58176a96 | 24 | #include <linux/completion.h> |
479965d6 | 25 | #include <asm/kmap_types.h> |
8ef97622 | 26 | #include "bit-radix.h" |
5f39d397 | 27 | #include "extent_map.h" |
e20d96d6 | 28 | |
e089f05c | 29 | struct btrfs_trans_handle; |
79154b1b | 30 | struct btrfs_transaction; |
35b7e476 CM |
31 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
32 | extern struct kmem_cache *btrfs_transaction_cachep; | |
33 | extern struct kmem_cache *btrfs_bit_radix_cachep; | |
2c90e5d6 | 34 | extern struct kmem_cache *btrfs_path_cachep; |
e089f05c | 35 | |
5f39d397 | 36 | #define BTRFS_MAGIC "_B2RfS_M" |
eb60ceac | 37 | |
6407bf6d | 38 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
0cf6c620 CM |
39 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
40 | #define BTRFS_FS_TREE_OBJECTID 3ULL | |
41 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 4ULL | |
42 | #define BTRFS_FIRST_FREE_OBJECTID 5ULL | |
3768f368 | 43 | |
e20d96d6 CM |
44 | /* |
45 | * we can actually store much bigger names, but lets not confuse the rest | |
46 | * of linux | |
47 | */ | |
48 | #define BTRFS_NAME_LEN 255 | |
49 | ||
f254e52c CM |
50 | /* 32 bytes in various csum fields */ |
51 | #define BTRFS_CSUM_SIZE 32 | |
509659cd CM |
52 | /* four bytes for CRC32 */ |
53 | #define BTRFS_CRC32_SIZE 4 | |
e06afa83 | 54 | #define BTRFS_EMPTY_DIR_SIZE 6 |
f254e52c | 55 | |
fabb5681 CM |
56 | #define BTRFS_FT_UNKNOWN 0 |
57 | #define BTRFS_FT_REG_FILE 1 | |
58 | #define BTRFS_FT_DIR 2 | |
59 | #define BTRFS_FT_CHRDEV 3 | |
60 | #define BTRFS_FT_BLKDEV 4 | |
61 | #define BTRFS_FT_FIFO 5 | |
62 | #define BTRFS_FT_SOCK 6 | |
63 | #define BTRFS_FT_SYMLINK 7 | |
64 | #define BTRFS_FT_MAX 8 | |
65 | ||
fec577fb CM |
66 | /* |
67 | * the key defines the order in the tree, and so it also defines (optimal) | |
68 | * block layout. objectid corresonds to the inode number. The flags | |
69 | * tells us things about the object, and is a kind of stream selector. | |
70 | * so for a given inode, keys with flags of 1 might refer to the inode | |
71 | * data, flags of 2 may point to file data in the btree and flags == 3 | |
72 | * may point to extents. | |
73 | * | |
74 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
75 | * |
76 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
77 | * in cpu native order. Otherwise they are identical and their sizes | |
78 | * should be the same (ie both packed) | |
fec577fb | 79 | */ |
e2fa7227 CM |
80 | struct btrfs_disk_key { |
81 | __le64 objectid; | |
5f39d397 | 82 | u8 type; |
70b2befd | 83 | __le64 offset; |
e2fa7227 CM |
84 | } __attribute__ ((__packed__)); |
85 | ||
86 | struct btrfs_key { | |
eb60ceac | 87 | u64 objectid; |
5f39d397 | 88 | u8 type; |
70b2befd | 89 | u64 offset; |
eb60ceac CM |
90 | } __attribute__ ((__packed__)); |
91 | ||
5f39d397 | 92 | #define BTRFS_FSID_SIZE 16 |
fec577fb CM |
93 | /* |
94 | * every tree block (leaf or node) starts with this header. | |
95 | */ | |
bb492bb0 | 96 | struct btrfs_header { |
f254e52c | 97 | u8 csum[BTRFS_CSUM_SIZE]; |
5f39d397 | 98 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
bb492bb0 | 99 | __le64 blocknr; /* which block this node is supposed to live in */ |
7f5c1516 | 100 | __le64 generation; |
4d775673 | 101 | __le64 owner; |
5f39d397 | 102 | __le32 nritems; |
bb492bb0 | 103 | __le16 flags; |
9a6f11ed | 104 | u8 level; |
eb60ceac CM |
105 | } __attribute__ ((__packed__)); |
106 | ||
234b63a0 | 107 | #define BTRFS_MAX_LEVEL 8 |
5f39d397 | 108 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
123abc88 CM |
109 | sizeof(struct btrfs_header)) / \ |
110 | (sizeof(struct btrfs_disk_key) + sizeof(u64))) | |
111 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) | |
5f39d397 | 112 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
236454df CM |
113 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
114 | sizeof(struct btrfs_item) - \ | |
115 | sizeof(struct btrfs_file_extent_item)) | |
eb60ceac | 116 | |
fec577fb CM |
117 | /* |
118 | * the super block basically lists the main trees of the FS | |
119 | * it currently lacks any block count etc etc | |
120 | */ | |
234b63a0 | 121 | struct btrfs_super_block { |
f254e52c | 122 | u8 csum[BTRFS_CSUM_SIZE]; |
87cbda5c | 123 | /* the first 3 fields must match struct btrfs_header */ |
3768f368 CM |
124 | u8 fsid[16]; /* FS specific uuid */ |
125 | __le64 blocknr; /* this block number */ | |
3768f368 | 126 | __le64 magic; |
3768f368 CM |
127 | __le64 generation; |
128 | __le64 root; | |
129 | __le64 total_blocks; | |
130 | __le64 blocks_used; | |
2e635a27 | 131 | __le64 root_dir_objectid; |
5f39d397 CM |
132 | __le32 sectorsize; |
133 | __le32 nodesize; | |
134 | __le32 leafsize; | |
cfaa7295 CM |
135 | } __attribute__ ((__packed__)); |
136 | ||
fec577fb | 137 | /* |
62e2749e | 138 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
139 | * the item in the leaf (relative to the start of the data area) |
140 | */ | |
0783fcfc | 141 | struct btrfs_item { |
e2fa7227 | 142 | struct btrfs_disk_key key; |
123abc88 | 143 | __le32 offset; |
5f39d397 | 144 | __le32 size; |
eb60ceac CM |
145 | } __attribute__ ((__packed__)); |
146 | ||
fec577fb CM |
147 | /* |
148 | * leaves have an item area and a data area: | |
149 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
150 | * | |
151 | * The data is separate from the items to get the keys closer together | |
152 | * during searches. | |
153 | */ | |
234b63a0 | 154 | struct btrfs_leaf { |
bb492bb0 | 155 | struct btrfs_header header; |
123abc88 | 156 | struct btrfs_item items[]; |
eb60ceac CM |
157 | } __attribute__ ((__packed__)); |
158 | ||
fec577fb CM |
159 | /* |
160 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
161 | * other blocks | |
162 | */ | |
123abc88 CM |
163 | struct btrfs_key_ptr { |
164 | struct btrfs_disk_key key; | |
165 | __le64 blockptr; | |
166 | } __attribute__ ((__packed__)); | |
167 | ||
234b63a0 | 168 | struct btrfs_node { |
bb492bb0 | 169 | struct btrfs_header header; |
123abc88 | 170 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
171 | } __attribute__ ((__packed__)); |
172 | ||
fec577fb | 173 | /* |
234b63a0 CM |
174 | * btrfs_paths remember the path taken from the root down to the leaf. |
175 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
176 | * to any other levels that are present. |
177 | * | |
178 | * The slots array records the index of the item or block pointer | |
179 | * used while walking the tree. | |
180 | */ | |
234b63a0 | 181 | struct btrfs_path { |
5f39d397 | 182 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
234b63a0 | 183 | int slots[BTRFS_MAX_LEVEL]; |
3c69faec | 184 | int reada; |
6702ed49 | 185 | int lowest_level; |
eb60ceac | 186 | }; |
5de08d7d | 187 | |
62e2749e CM |
188 | /* |
189 | * items in the extent btree are used to record the objectid of the | |
190 | * owner of the block and the number of references | |
191 | */ | |
192 | struct btrfs_extent_item { | |
193 | __le32 refs; | |
4d775673 | 194 | __le64 owner; |
62e2749e CM |
195 | } __attribute__ ((__packed__)); |
196 | ||
1e1d2701 | 197 | struct btrfs_inode_timespec { |
f254e52c | 198 | __le64 sec; |
1e1d2701 CM |
199 | __le32 nsec; |
200 | } __attribute__ ((__packed__)); | |
201 | ||
202 | /* | |
203 | * there is no padding here on purpose. If you want to extent the inode, | |
204 | * make a new item type | |
205 | */ | |
206 | struct btrfs_inode_item { | |
207 | __le64 generation; | |
208 | __le64 size; | |
209 | __le64 nblocks; | |
31f3c99b | 210 | __le64 block_group; |
1e1d2701 CM |
211 | __le32 nlink; |
212 | __le32 uid; | |
213 | __le32 gid; | |
214 | __le32 mode; | |
215 | __le32 rdev; | |
216 | __le16 flags; | |
217 | __le16 compat_flags; | |
218 | struct btrfs_inode_timespec atime; | |
219 | struct btrfs_inode_timespec ctime; | |
220 | struct btrfs_inode_timespec mtime; | |
221 | struct btrfs_inode_timespec otime; | |
222 | } __attribute__ ((__packed__)); | |
223 | ||
62e2749e | 224 | struct btrfs_dir_item { |
d6e4a428 | 225 | struct btrfs_disk_key location; |
62e2749e | 226 | __le16 flags; |
a8a2ee0c | 227 | __le16 name_len; |
62e2749e CM |
228 | u8 type; |
229 | } __attribute__ ((__packed__)); | |
230 | ||
231 | struct btrfs_root_item { | |
d6e4a428 CM |
232 | struct btrfs_inode_item inode; |
233 | __le64 root_dirid; | |
62e2749e | 234 | __le64 blocknr; |
62e2749e CM |
235 | __le64 block_limit; |
236 | __le64 blocks_used; | |
5eda7b5e | 237 | __le32 flags; |
62e2749e | 238 | __le32 refs; |
5eda7b5e CM |
239 | struct btrfs_disk_key drop_progress; |
240 | u8 drop_level; | |
9f5fae2f | 241 | } __attribute__ ((__packed__)); |
62e2749e | 242 | |
236454df CM |
243 | #define BTRFS_FILE_EXTENT_REG 0 |
244 | #define BTRFS_FILE_EXTENT_INLINE 1 | |
245 | ||
9f5fae2f | 246 | struct btrfs_file_extent_item { |
71951f35 | 247 | __le64 generation; |
236454df | 248 | u8 type; |
9f5fae2f CM |
249 | /* |
250 | * disk space consumed by the extent, checksum blocks are included | |
251 | * in these numbers | |
252 | */ | |
253 | __le64 disk_blocknr; | |
254 | __le64 disk_num_blocks; | |
255 | /* | |
dee26a9f | 256 | * the logical offset in file blocks (no csums) |
9f5fae2f CM |
257 | * this extent record is for. This allows a file extent to point |
258 | * into the middle of an existing extent on disk, sharing it | |
259 | * between two snapshots (useful if some bytes in the middle of the | |
260 | * extent have changed | |
261 | */ | |
262 | __le64 offset; | |
263 | /* | |
264 | * the logical number of file blocks (no csums included) | |
265 | */ | |
266 | __le64 num_blocks; | |
267 | } __attribute__ ((__packed__)); | |
268 | ||
f254e52c | 269 | struct btrfs_csum_item { |
509659cd | 270 | u8 csum; |
f254e52c CM |
271 | } __attribute__ ((__packed__)); |
272 | ||
9078a3e1 | 273 | /* tag for the radix tree of block groups in ram */ |
9078a3e1 | 274 | #define BTRFS_BLOCK_GROUP_SIZE (256 * 1024 * 1024) |
1e2677e0 CM |
275 | |
276 | ||
277 | #define BTRFS_BLOCK_GROUP_DATA 1 | |
9078a3e1 CM |
278 | struct btrfs_block_group_item { |
279 | __le64 used; | |
1e2677e0 | 280 | u8 flags; |
9078a3e1 CM |
281 | } __attribute__ ((__packed__)); |
282 | ||
283 | struct btrfs_block_group_cache { | |
284 | struct btrfs_key key; | |
285 | struct btrfs_block_group_item item; | |
cd1bc465 CM |
286 | u64 first_free; |
287 | u64 last_alloc; | |
be744175 | 288 | u64 pinned; |
e37c9e69 | 289 | u64 last_prealloc; |
be744175 | 290 | int data; |
e37c9e69 | 291 | int cached; |
9078a3e1 CM |
292 | }; |
293 | ||
9f5fae2f | 294 | struct btrfs_fs_info { |
5f39d397 | 295 | u8 fsid[BTRFS_FSID_SIZE]; |
62e2749e CM |
296 | struct btrfs_root *extent_root; |
297 | struct btrfs_root *tree_root; | |
0f7d52f4 | 298 | struct radix_tree_root fs_roots_radix; |
8ef97622 | 299 | struct radix_tree_root pending_del_radix; |
62e2749e | 300 | struct radix_tree_root pinned_radix; |
26b8003f | 301 | struct radix_tree_root extent_ins_radix; |
f510cfec | 302 | struct extent_map_tree free_space_cache; |
96b5179d | 303 | struct extent_map_tree block_group_cache; |
293ffd5f | 304 | u64 generation; |
15ee9bc7 | 305 | u64 last_trans_committed; |
79154b1b | 306 | struct btrfs_transaction *running_transaction; |
4b52dff6 | 307 | struct btrfs_super_block super_copy; |
5f39d397 | 308 | struct extent_buffer *sb_buffer; |
e20d96d6 | 309 | struct super_block *sb; |
d98237b3 | 310 | struct inode *btree_inode; |
79154b1b | 311 | struct mutex trans_mutex; |
d561c025 | 312 | struct mutex fs_mutex; |
8fd17795 | 313 | struct list_head trans_list; |
facda1e7 | 314 | struct list_head dead_roots; |
08607c1b | 315 | struct delayed_work trans_work; |
58176a96 JB |
316 | struct kobject super_kobj; |
317 | struct completion kobj_unregister; | |
e66f709b | 318 | int do_barriers; |
facda1e7 | 319 | int closing; |
9f5fae2f CM |
320 | }; |
321 | ||
322 | /* | |
323 | * in ram representation of the tree. extent_root is used for all allocations | |
f2458e1d | 324 | * and for the extent tree extent_root root. |
9f5fae2f CM |
325 | */ |
326 | struct btrfs_root { | |
5f39d397 CM |
327 | struct extent_buffer *node; |
328 | struct extent_buffer *commit_root; | |
62e2749e CM |
329 | struct btrfs_root_item root_item; |
330 | struct btrfs_key root_key; | |
9f5fae2f | 331 | struct btrfs_fs_info *fs_info; |
0f7d52f4 | 332 | struct inode *inode; |
58176a96 JB |
333 | struct kobject root_kobj; |
334 | struct completion kobj_unregister; | |
011410bd | 335 | struct rw_semaphore snap_sem; |
0f7d52f4 CM |
336 | u64 objectid; |
337 | u64 last_trans; | |
5f39d397 CM |
338 | |
339 | /* data allocations are done in sectorsize units */ | |
340 | u32 sectorsize; | |
341 | ||
342 | /* node allocations are done in nodesize units */ | |
343 | u32 nodesize; | |
344 | ||
345 | /* leaf allocations are done in leafsize units */ | |
346 | u32 leafsize; | |
347 | ||
9f5fae2f | 348 | u32 type; |
1b05da2e CM |
349 | u64 highest_inode; |
350 | u64 last_inode_alloc; | |
9f3a7427 | 351 | int ref_cows; |
6702ed49 CM |
352 | struct btrfs_key defrag_progress; |
353 | int defrag_running; | |
354 | int defrag_level; | |
58176a96 | 355 | char *name; |
62e2749e CM |
356 | }; |
357 | ||
1e1d2701 CM |
358 | /* |
359 | * inode items have the data typically returned from stat and store other | |
360 | * info about object characteristics. There is one for every file and dir in | |
361 | * the FS | |
362 | */ | |
9078a3e1 CM |
363 | #define BTRFS_INODE_ITEM_KEY 1 |
364 | ||
365 | /* reserve 2-15 close to the inode for later flexibility */ | |
1e1d2701 CM |
366 | |
367 | /* | |
368 | * dir items are the name -> inode pointers in a directory. There is one | |
369 | * for every name in a directory. | |
370 | */ | |
9078a3e1 CM |
371 | #define BTRFS_DIR_ITEM_KEY 16 |
372 | #define BTRFS_DIR_INDEX_KEY 17 | |
1e1d2701 | 373 | /* |
9078a3e1 | 374 | * extent data is for file data |
1e1d2701 | 375 | */ |
9078a3e1 | 376 | #define BTRFS_EXTENT_DATA_KEY 18 |
f254e52c CM |
377 | /* |
378 | * csum items have the checksums for data in the extents | |
379 | */ | |
9078a3e1 CM |
380 | #define BTRFS_CSUM_ITEM_KEY 19 |
381 | ||
382 | /* reserve 20-31 for other file stuff */ | |
f254e52c | 383 | |
1e1d2701 CM |
384 | /* |
385 | * root items point to tree roots. There are typically in the root | |
386 | * tree used by the super block to find all the other trees | |
387 | */ | |
9078a3e1 | 388 | #define BTRFS_ROOT_ITEM_KEY 32 |
1e1d2701 CM |
389 | /* |
390 | * extent items are in the extent map tree. These record which blocks | |
391 | * are used, and how many references there are to each block | |
392 | */ | |
9078a3e1 CM |
393 | #define BTRFS_EXTENT_ITEM_KEY 33 |
394 | ||
395 | /* | |
396 | * block groups give us hints into the extent allocation trees. Which | |
397 | * blocks are free etc etc | |
398 | */ | |
399 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 34 | |
9f5fae2f | 400 | |
1e1d2701 CM |
401 | /* |
402 | * string items are for debugging. They just store a short string of | |
403 | * data in the FS | |
404 | */ | |
9078a3e1 CM |
405 | #define BTRFS_STRING_ITEM_KEY 253 |
406 | ||
5f39d397 CM |
407 | /* some macros to generate set/get funcs for the struct fields. This |
408 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | |
409 | * one for u8: | |
410 | */ | |
411 | #define le8_to_cpu(v) (v) | |
412 | #define cpu_to_le8(v) (v) | |
413 | #define __le8 u8 | |
414 | ||
415 | #define read_eb_member(eb, ptr, type, member, result) ( \ | |
416 | read_extent_buffer(eb, (char *)(result), \ | |
417 | ((unsigned long)(ptr)) + \ | |
418 | offsetof(type, member), \ | |
419 | sizeof(((type *)0)->member))) | |
420 | ||
421 | #define write_eb_member(eb, ptr, type, member, result) ( \ | |
422 | write_extent_buffer(eb, (char *)(result), \ | |
423 | ((unsigned long)(ptr)) + \ | |
424 | offsetof(type, member), \ | |
425 | sizeof(((type *)0)->member))) | |
426 | ||
427 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ | |
428 | static inline u##bits btrfs_##name(struct extent_buffer *eb, \ | |
429 | type *s) \ | |
430 | { \ | |
479965d6 CM |
431 | int err; \ |
432 | char *map_token; \ | |
433 | char *kaddr; \ | |
434 | unsigned long map_start; \ | |
435 | unsigned long map_len; \ | |
436 | unsigned long offset = (unsigned long)s + \ | |
437 | offsetof(type, member); \ | |
438 | err = map_extent_buffer(eb, offset, \ | |
439 | sizeof(((type *)0)->member), \ | |
440 | &map_token, &kaddr, \ | |
441 | &map_start, &map_len, KM_USER0); \ | |
442 | if (!err) { \ | |
443 | __le##bits *tmp = (__le##bits *)(kaddr + offset - \ | |
444 | map_start); \ | |
445 | u##bits res = le##bits##_to_cpu(*tmp); \ | |
446 | unmap_extent_buffer(eb, map_token, KM_USER0); \ | |
447 | return res; \ | |
448 | } else { \ | |
449 | __le##bits res; \ | |
450 | read_eb_member(eb, s, type, member, &res); \ | |
451 | return le##bits##_to_cpu(res); \ | |
452 | } \ | |
5f39d397 CM |
453 | } \ |
454 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
455 | type *s, u##bits val) \ | |
456 | { \ | |
479965d6 CM |
457 | int err; \ |
458 | char *map_token; \ | |
459 | char *kaddr; \ | |
460 | unsigned long map_start; \ | |
461 | unsigned long map_len; \ | |
462 | unsigned long offset = (unsigned long)s + \ | |
463 | offsetof(type, member); \ | |
464 | err = map_extent_buffer(eb, offset, \ | |
465 | sizeof(((type *)0)->member), \ | |
466 | &map_token, &kaddr, \ | |
467 | &map_start, &map_len, KM_USER0); \ | |
468 | if (!err) { \ | |
469 | __le##bits *tmp = (__le##bits *)(kaddr + offset - \ | |
470 | map_start); \ | |
471 | *tmp = cpu_to_le##bits(val); \ | |
472 | unmap_extent_buffer(eb, map_token, KM_USER0); \ | |
473 | } else { \ | |
474 | val = cpu_to_le##bits(val); \ | |
475 | write_eb_member(eb, s, type, member, &val); \ | |
476 | } \ | |
5f39d397 CM |
477 | } |
478 | ||
479 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | |
480 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | |
481 | { \ | |
6d36dcd4 CM |
482 | int err; \ |
483 | char *map_token; \ | |
484 | char *kaddr; \ | |
485 | unsigned long map_start; \ | |
486 | unsigned long map_len; \ | |
487 | unsigned long offset = offsetof(type, member); \ | |
488 | err = map_extent_buffer(eb, offset, \ | |
489 | sizeof(((type *)0)->member), \ | |
490 | &map_token, &kaddr, \ | |
491 | &map_start, &map_len, KM_USER0); \ | |
492 | if (!err) { \ | |
493 | __le##bits *tmp = (__le##bits *)(kaddr + offset - \ | |
494 | map_start); \ | |
495 | u##bits res = le##bits##_to_cpu(*tmp); \ | |
496 | unmap_extent_buffer(eb, map_token, KM_USER0); \ | |
497 | return res; \ | |
498 | } else { \ | |
499 | __le##bits res; \ | |
500 | read_eb_member(eb, NULL, type, member, &res); \ | |
501 | return le##bits##_to_cpu(res); \ | |
502 | } \ | |
5f39d397 CM |
503 | } \ |
504 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
505 | u##bits val) \ | |
506 | { \ | |
6d36dcd4 CM |
507 | int err; \ |
508 | char *map_token; \ | |
509 | char *kaddr; \ | |
510 | unsigned long map_start; \ | |
511 | unsigned long map_len; \ | |
512 | unsigned long offset = offsetof(type, member); \ | |
513 | err = map_extent_buffer(eb, offset, \ | |
514 | sizeof(((type *)0)->member), \ | |
515 | &map_token, &kaddr, \ | |
516 | &map_start, &map_len, KM_USER0); \ | |
517 | if (!err) { \ | |
518 | __le##bits *tmp = (__le##bits *)(kaddr + offset - \ | |
519 | map_start); \ | |
520 | *tmp = cpu_to_le##bits(val); \ | |
521 | unmap_extent_buffer(eb, map_token, KM_USER0); \ | |
522 | } else { \ | |
523 | val = cpu_to_le##bits(val); \ | |
524 | write_eb_member(eb, NULL, type, member, &val); \ | |
525 | } \ | |
5f39d397 | 526 | } |
9078a3e1 | 527 | |
5f39d397 CM |
528 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
529 | static inline u##bits btrfs_##name(type *s) \ | |
530 | { \ | |
531 | return le##bits##_to_cpu(s->member); \ | |
532 | } \ | |
533 | static inline void btrfs_set_##name(type *s, u##bits val) \ | |
534 | { \ | |
535 | s->member = cpu_to_le##bits(val); \ | |
1e1d2701 CM |
536 | } |
537 | ||
5f39d397 CM |
538 | /* struct btrfs_block_group_item */ |
539 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | |
540 | used, 64); | |
541 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | |
542 | used, 64); | |
1e1d2701 | 543 | |
5f39d397 CM |
544 | /* struct btrfs_inode_item */ |
545 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | |
546 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); | |
547 | BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64); | |
548 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); | |
549 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | |
550 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | |
551 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | |
552 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | |
553 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 32); | |
554 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16); | |
555 | BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item, | |
556 | compat_flags, 16); | |
1e1d2701 | 557 | |
5f39d397 CM |
558 | static inline struct btrfs_inode_timespec * |
559 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) | |
1e1d2701 | 560 | { |
5f39d397 CM |
561 | unsigned long ptr = (unsigned long)inode_item; |
562 | ptr += offsetof(struct btrfs_inode_item, atime); | |
563 | return (struct btrfs_inode_timespec *)ptr; | |
1e1d2701 CM |
564 | } |
565 | ||
5f39d397 CM |
566 | static inline struct btrfs_inode_timespec * |
567 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) | |
1e1d2701 | 568 | { |
5f39d397 CM |
569 | unsigned long ptr = (unsigned long)inode_item; |
570 | ptr += offsetof(struct btrfs_inode_item, mtime); | |
571 | return (struct btrfs_inode_timespec *)ptr; | |
1e1d2701 CM |
572 | } |
573 | ||
5f39d397 CM |
574 | static inline struct btrfs_inode_timespec * |
575 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) | |
1e1d2701 | 576 | { |
5f39d397 CM |
577 | unsigned long ptr = (unsigned long)inode_item; |
578 | ptr += offsetof(struct btrfs_inode_item, ctime); | |
579 | return (struct btrfs_inode_timespec *)ptr; | |
1e1d2701 CM |
580 | } |
581 | ||
5f39d397 CM |
582 | static inline struct btrfs_inode_timespec * |
583 | btrfs_inode_otime(struct btrfs_inode_item *inode_item) | |
1e1d2701 | 584 | { |
5f39d397 CM |
585 | unsigned long ptr = (unsigned long)inode_item; |
586 | ptr += offsetof(struct btrfs_inode_item, otime); | |
587 | return (struct btrfs_inode_timespec *)ptr; | |
1e1d2701 CM |
588 | } |
589 | ||
5f39d397 CM |
590 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_inode_timespec, sec, 64); |
591 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_inode_timespec, nsec, 32); | |
e20d96d6 | 592 | |
5f39d397 CM |
593 | /* struct btrfs_extent_item */ |
594 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32); | |
595 | BTRFS_SETGET_FUNCS(extent_owner, struct btrfs_extent_item, owner, 32); | |
e20d96d6 | 596 | |
5f39d397 CM |
597 | BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, |
598 | refs, 32); | |
599 | BTRFS_SETGET_STACK_FUNCS(stack_extent_owner, struct btrfs_extent_item, | |
600 | owner, 32); | |
e20d96d6 | 601 | |
5f39d397 CM |
602 | /* struct btrfs_node */ |
603 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | |
e20d96d6 | 604 | |
5f39d397 | 605 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
cf27e1ee | 606 | { |
5f39d397 CM |
607 | unsigned long ptr; |
608 | ptr = offsetof(struct btrfs_node, ptrs) + | |
609 | sizeof(struct btrfs_key_ptr) * nr; | |
610 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | |
cf27e1ee CM |
611 | } |
612 | ||
5f39d397 CM |
613 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
614 | int nr, u64 val) | |
cf27e1ee | 615 | { |
5f39d397 CM |
616 | unsigned long ptr; |
617 | ptr = offsetof(struct btrfs_node, ptrs) + | |
618 | sizeof(struct btrfs_key_ptr) * nr; | |
619 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | |
cf27e1ee CM |
620 | } |
621 | ||
5f39d397 | 622 | static unsigned long btrfs_node_key_ptr_offset(int nr) |
4d775673 | 623 | { |
5f39d397 CM |
624 | return offsetof(struct btrfs_node, ptrs) + |
625 | sizeof(struct btrfs_key_ptr) * nr; | |
4d775673 CM |
626 | } |
627 | ||
5f39d397 CM |
628 | static void btrfs_node_key(struct extent_buffer *eb, |
629 | struct btrfs_disk_key *disk_key, int nr) | |
4d775673 | 630 | { |
5f39d397 CM |
631 | unsigned long ptr; |
632 | ptr = btrfs_node_key_ptr_offset(nr); | |
633 | read_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
634 | struct btrfs_key_ptr, key, disk_key); | |
4d775673 | 635 | } |
5f39d397 CM |
636 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
637 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f8a0c | 638 | { |
5f39d397 CM |
639 | unsigned long ptr; |
640 | ptr = btrfs_node_key_ptr_offset(nr); | |
641 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
642 | struct btrfs_key_ptr, key, disk_key); | |
1d4f8a0c CM |
643 | } |
644 | ||
5f39d397 CM |
645 | /* struct btrfs_item */ |
646 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | |
647 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | |
4d775673 | 648 | |
5f39d397 | 649 | static inline unsigned long btrfs_item_nr_offset(int nr) |
1d4f8a0c | 650 | { |
5f39d397 CM |
651 | return offsetof(struct btrfs_leaf, items) + |
652 | sizeof(struct btrfs_item) * nr; | |
1d4f8a0c CM |
653 | } |
654 | ||
5f39d397 CM |
655 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
656 | int nr) | |
0783fcfc | 657 | { |
5f39d397 | 658 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
0783fcfc CM |
659 | } |
660 | ||
5f39d397 CM |
661 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
662 | struct btrfs_item *item) | |
0783fcfc | 663 | { |
5f39d397 | 664 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
0783fcfc CM |
665 | } |
666 | ||
5f39d397 | 667 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 668 | { |
5f39d397 | 669 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
670 | } |
671 | ||
5f39d397 | 672 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 673 | { |
5f39d397 | 674 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
675 | } |
676 | ||
5f39d397 | 677 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 678 | { |
5f39d397 | 679 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
680 | } |
681 | ||
5f39d397 CM |
682 | static inline void btrfs_item_key(struct extent_buffer *eb, |
683 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 684 | { |
5f39d397 CM |
685 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
686 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
687 | } |
688 | ||
5f39d397 CM |
689 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
690 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 691 | { |
5f39d397 CM |
692 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
693 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
694 | } |
695 | ||
5f39d397 CM |
696 | /* struct btrfs_dir_item */ |
697 | BTRFS_SETGET_FUNCS(dir_flags, struct btrfs_dir_item, flags, 16); | |
698 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); | |
699 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | |
1d4f6404 | 700 | |
5f39d397 CM |
701 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
702 | struct btrfs_dir_item *item, | |
703 | struct btrfs_disk_key *key) | |
1d4f6404 | 704 | { |
5f39d397 | 705 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
1d4f6404 CM |
706 | } |
707 | ||
5f39d397 CM |
708 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
709 | struct btrfs_dir_item *item, | |
710 | struct btrfs_disk_key *key) | |
a8a2ee0c | 711 | { |
5f39d397 | 712 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
a8a2ee0c CM |
713 | } |
714 | ||
5f39d397 CM |
715 | /* struct btrfs_disk_key */ |
716 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | |
717 | objectid, 64); | |
718 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | |
719 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | |
1d4f6404 | 720 | |
e2fa7227 CM |
721 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
722 | struct btrfs_disk_key *disk) | |
723 | { | |
724 | cpu->offset = le64_to_cpu(disk->offset); | |
5f39d397 | 725 | cpu->type = disk->type; |
e2fa7227 CM |
726 | cpu->objectid = le64_to_cpu(disk->objectid); |
727 | } | |
728 | ||
729 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
730 | struct btrfs_key *cpu) | |
731 | { | |
732 | disk->offset = cpu_to_le64(cpu->offset); | |
5f39d397 | 733 | disk->type = cpu->type; |
e2fa7227 CM |
734 | disk->objectid = cpu_to_le64(cpu->objectid); |
735 | } | |
736 | ||
5f39d397 CM |
737 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
738 | struct btrfs_key *key, int nr) | |
7f5c1516 | 739 | { |
5f39d397 CM |
740 | struct btrfs_disk_key disk_key; |
741 | btrfs_node_key(eb, &disk_key, nr); | |
742 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
743 | } |
744 | ||
5f39d397 CM |
745 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
746 | struct btrfs_key *key, int nr) | |
7f5c1516 | 747 | { |
5f39d397 CM |
748 | struct btrfs_disk_key disk_key; |
749 | btrfs_item_key(eb, &disk_key, nr); | |
750 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
751 | } |
752 | ||
5f39d397 CM |
753 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
754 | struct btrfs_dir_item *item, | |
755 | struct btrfs_key *key) | |
4d775673 | 756 | { |
5f39d397 CM |
757 | struct btrfs_disk_key disk_key; |
758 | btrfs_dir_item_key(eb, item, &disk_key); | |
759 | btrfs_disk_key_to_cpu(key, &disk_key); | |
4d775673 CM |
760 | } |
761 | ||
58176a96 | 762 | |
5f39d397 | 763 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
3768f368 | 764 | { |
5f39d397 | 765 | return key->type; |
3768f368 CM |
766 | } |
767 | ||
5f39d397 | 768 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
3768f368 | 769 | { |
5f39d397 | 770 | key->type = val; |
3768f368 CM |
771 | } |
772 | ||
5f39d397 CM |
773 | /* struct btrfs_header */ |
774 | BTRFS_SETGET_HEADER_FUNCS(header_blocknr, struct btrfs_header, blocknr, 64); | |
775 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, | |
776 | generation, 64); | |
777 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | |
778 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | |
779 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 16); | |
780 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); | |
0f7d52f4 | 781 | |
5f39d397 | 782 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
0f7d52f4 | 783 | { |
5f39d397 CM |
784 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
785 | return (u8 *)ptr; | |
0f7d52f4 CM |
786 | } |
787 | ||
5f39d397 | 788 | static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) |
3768f368 | 789 | { |
5f39d397 CM |
790 | unsigned long ptr = offsetof(struct btrfs_super_block, fsid); |
791 | return (u8 *)ptr; | |
3768f368 CM |
792 | } |
793 | ||
5f39d397 | 794 | static inline u8 *btrfs_header_csum(struct extent_buffer *eb) |
3768f368 | 795 | { |
5f39d397 CM |
796 | unsigned long ptr = offsetof(struct btrfs_header, csum); |
797 | return (u8 *)ptr; | |
3768f368 CM |
798 | } |
799 | ||
5f39d397 | 800 | static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) |
3768f368 | 801 | { |
5f39d397 | 802 | return NULL; |
3768f368 CM |
803 | } |
804 | ||
5f39d397 | 805 | static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) |
3768f368 | 806 | { |
5f39d397 | 807 | return NULL; |
3768f368 CM |
808 | } |
809 | ||
5f39d397 | 810 | static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) |
3768f368 | 811 | { |
5f39d397 | 812 | return NULL; |
3768f368 CM |
813 | } |
814 | ||
5f39d397 | 815 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
3768f368 | 816 | { |
5f39d397 | 817 | return (btrfs_header_level(eb) == 0); |
3768f368 CM |
818 | } |
819 | ||
5f39d397 CM |
820 | /* struct btrfs_root_item */ |
821 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); | |
822 | BTRFS_SETGET_FUNCS(disk_root_blocknr, struct btrfs_root_item, blocknr, 64); | |
3768f368 | 823 | |
5f39d397 CM |
824 | BTRFS_SETGET_STACK_FUNCS(root_blocknr, struct btrfs_root_item, blocknr, 64); |
825 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); | |
826 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | |
827 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32); | |
828 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, blocks_used, 64); | |
829 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, block_limit, 64); | |
123abc88 | 830 | |
5f39d397 CM |
831 | /* struct btrfs_super_block */ |
832 | BTRFS_SETGET_STACK_FUNCS(super_blocknr, struct btrfs_super_block, blocknr, 64); | |
833 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, | |
834 | generation, 64); | |
835 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | |
836 | BTRFS_SETGET_STACK_FUNCS(super_total_blocks, struct btrfs_super_block, | |
837 | total_blocks, 64); | |
838 | BTRFS_SETGET_STACK_FUNCS(super_blocks_used, struct btrfs_super_block, | |
839 | blocks_used, 64); | |
840 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, | |
841 | sectorsize, 32); | |
842 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | |
843 | nodesize, 32); | |
844 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, | |
845 | leafsize, 32); | |
846 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, | |
847 | root_dir_objectid, 64); | |
2e635a27 | 848 | |
5f39d397 | 849 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
2e635a27 | 850 | { |
5f39d397 | 851 | return offsetof(struct btrfs_leaf, items); |
2e635a27 CM |
852 | } |
853 | ||
5f39d397 CM |
854 | /* struct btrfs_file_extent_item */ |
855 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | |
9f5fae2f | 856 | |
5f39d397 | 857 | static inline unsigned long btrfs_file_extent_inline_start(struct |
236454df CM |
858 | btrfs_file_extent_item *e) |
859 | { | |
5f39d397 CM |
860 | unsigned long offset = (unsigned long)e; |
861 | offset += offsetof(struct btrfs_file_extent_item, disk_blocknr); | |
862 | return offset; | |
236454df CM |
863 | } |
864 | ||
865 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
866 | { | |
5f39d397 | 867 | return offsetof(struct btrfs_file_extent_item, disk_blocknr) + datasize; |
9f5fae2f CM |
868 | } |
869 | ||
5f39d397 CM |
870 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, |
871 | struct btrfs_item *e) | |
9f5fae2f | 872 | { |
5f39d397 CM |
873 | unsigned long offset; |
874 | offset = offsetof(struct btrfs_file_extent_item, disk_blocknr); | |
875 | return btrfs_item_size(eb, e) - offset; | |
9f5fae2f CM |
876 | } |
877 | ||
5f39d397 CM |
878 | BTRFS_SETGET_FUNCS(file_extent_disk_blocknr, struct btrfs_file_extent_item, |
879 | disk_blocknr, 64); | |
880 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, | |
881 | generation, 64); | |
882 | BTRFS_SETGET_FUNCS(file_extent_disk_num_blocks, struct btrfs_file_extent_item, | |
883 | disk_num_blocks, 64); | |
884 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, | |
885 | offset, 64); | |
886 | BTRFS_SETGET_FUNCS(file_extent_num_blocks, struct btrfs_file_extent_item, | |
887 | num_blocks, 64); | |
9f5fae2f | 888 | |
e20d96d6 CM |
889 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
890 | { | |
891 | return sb->s_fs_info; | |
892 | } | |
893 | ||
58176a96 JB |
894 | static inline int btrfs_set_root_name(struct btrfs_root *root, |
895 | const char *name, int len) | |
896 | { | |
897 | /* if we already have a name just free it */ | |
898 | if (root->name) | |
899 | kfree(root->name); | |
900 | ||
901 | root->name = kmalloc(len+1, GFP_KERNEL); | |
902 | if (!root->name) | |
903 | return -ENOMEM; | |
904 | ||
905 | memcpy(root->name, name, len); | |
906 | root->name[len] ='\0'; | |
907 | ||
908 | return 0; | |
909 | } | |
910 | ||
4beb1b8b CM |
911 | /* helper function to cast into the data area of the leaf. */ |
912 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 | 913 | ((type *)(btrfs_leaf_data(leaf) + \ |
5f39d397 CM |
914 | btrfs_item_offset_nr(leaf, slot))) |
915 | ||
916 | #define btrfs_item_ptr_offset(leaf, slot) \ | |
917 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | |
918 | btrfs_item_offset_nr(leaf, slot))) | |
4beb1b8b | 919 | |
95e05289 CM |
920 | /* mount option defines and helpers */ |
921 | #define BTRFS_MOUNT_SUBVOL 0x000001 | |
922 | #define btrfs_clear_opt(o, opt) o &= ~BTRFS_MOUNT_##opt | |
923 | #define btrfs_set_opt(o, opt) o |= BTRFS_MOUNT_##opt | |
924 | #define btrfs_test_opt(sb, opt) (BTRFS_SB(sb)->s_mount_opt & \ | |
925 | BTRFS_MOUNT_##opt) | |
b18c6685 | 926 | /* extent-tree.c */ |
e9d0b13b CM |
927 | int btrfs_extent_post_op(struct btrfs_trans_handle *trans, |
928 | struct btrfs_root *root); | |
ccd467d6 | 929 | int btrfs_copy_pinned(struct btrfs_root *root, struct radix_tree_root *copy); |
5276aeda CM |
930 | struct btrfs_block_group_cache *btrfs_lookup_block_group(struct |
931 | btrfs_fs_info *info, | |
932 | u64 blocknr); | |
31f3c99b CM |
933 | struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root, |
934 | struct btrfs_block_group_cache | |
be744175 | 935 | *hint, u64 search_start, |
de428b63 | 936 | int data, int owner); |
c5739bba CM |
937 | int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, |
938 | struct btrfs_root *root); | |
5f39d397 | 939 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
6702ed49 CM |
940 | struct btrfs_root *root, u64 hint, |
941 | u64 empty_size); | |
4d775673 CM |
942 | int btrfs_alloc_extent(struct btrfs_trans_handle *trans, |
943 | struct btrfs_root *root, u64 owner, | |
6702ed49 | 944 | u64 num_blocks, u64 empty_size, u64 search_start, |
be08c1b9 | 945 | u64 search_end, struct btrfs_key *ins, int data); |
e089f05c | 946 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
5f39d397 | 947 | struct extent_buffer *buf); |
e089f05c CM |
948 | int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
949 | *root, u64 blocknr, u64 num_blocks, int pin); | |
ccd467d6 CM |
950 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
951 | struct btrfs_root *root, | |
952 | struct radix_tree_root *unpin_radix); | |
b18c6685 CM |
953 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
954 | struct btrfs_root *root, | |
955 | u64 blocknr, u64 num_blocks); | |
9078a3e1 CM |
956 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
957 | struct btrfs_root *root); | |
958 | int btrfs_free_block_groups(struct btrfs_fs_info *info); | |
959 | int btrfs_read_block_groups(struct btrfs_root *root); | |
dee26a9f | 960 | /* ctree.c */ |
5f39d397 CM |
961 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
962 | struct btrfs_root *root, struct extent_buffer *buf, | |
963 | struct extent_buffer *parent, int parent_slot, | |
964 | struct extent_buffer **cow_ret); | |
6567e837 CM |
965 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
966 | *root, struct btrfs_path *path, u32 data_size); | |
b18c6685 CM |
967 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
968 | struct btrfs_root *root, | |
969 | struct btrfs_path *path, | |
970 | u32 new_size); | |
e089f05c CM |
971 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
972 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
973 | ins_len, int cow); | |
6702ed49 | 974 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
5f39d397 | 975 | struct btrfs_root *root, struct extent_buffer *parent, |
e9d0b13b | 976 | int cache_only, u64 *last_ret); |
234b63a0 | 977 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
2c90e5d6 CM |
978 | struct btrfs_path *btrfs_alloc_path(void); |
979 | void btrfs_free_path(struct btrfs_path *p); | |
234b63a0 | 980 | void btrfs_init_path(struct btrfs_path *p); |
e089f05c CM |
981 | int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
982 | struct btrfs_path *path); | |
983 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root | |
984 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
985 | int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root | |
986 | *root, struct btrfs_path *path, struct btrfs_key | |
987 | *cpu_key, u32 data_size); | |
234b63a0 | 988 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
5f39d397 | 989 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
e089f05c | 990 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
9f3a7427 | 991 | *root); |
dee26a9f | 992 | /* root-item.c */ |
e089f05c CM |
993 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
994 | struct btrfs_key *key); | |
995 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
996 | *root, struct btrfs_key *key, struct btrfs_root_item | |
997 | *item); | |
998 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
999 | *root, struct btrfs_key *key, struct btrfs_root_item | |
1000 | *item); | |
1001 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct | |
1002 | btrfs_root_item *item, struct btrfs_key *key); | |
5ce14bbc CM |
1003 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid, |
1004 | struct btrfs_root *latest_root); | |
dee26a9f | 1005 | /* dir-item.c */ |
e089f05c | 1006 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
1007 | *root, const char *name, int name_len, u64 dir, |
1008 | struct btrfs_key *location, u8 type); | |
7e38180e CM |
1009 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
1010 | struct btrfs_root *root, | |
1011 | struct btrfs_path *path, u64 dir, | |
1012 | const char *name, int name_len, | |
1013 | int mod); | |
1014 | struct btrfs_dir_item * | |
1015 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | |
1016 | struct btrfs_root *root, | |
1017 | struct btrfs_path *path, u64 dir, | |
1018 | u64 objectid, const char *name, int name_len, | |
1019 | int mod); | |
1020 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, | |
1021 | struct btrfs_path *path, | |
7f5c1516 | 1022 | const char *name, int name_len); |
7e38180e CM |
1023 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
1024 | struct btrfs_root *root, | |
1025 | struct btrfs_path *path, | |
1026 | struct btrfs_dir_item *di); | |
dee26a9f | 1027 | /* inode-map.c */ |
9f5fae2f CM |
1028 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
1029 | struct btrfs_root *fs_root, | |
1030 | u64 dirid, u64 *objectid); | |
5be6f7f1 CM |
1031 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
1032 | ||
dee26a9f | 1033 | /* inode-item.c */ |
5f39d397 CM |
1034 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
1035 | struct btrfs_root *root, | |
1036 | struct btrfs_path *path, u64 objectid); | |
293ffd5f | 1037 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
1038 | *root, struct btrfs_path *path, |
1039 | struct btrfs_key *location, int mod); | |
dee26a9f CM |
1040 | |
1041 | /* file-item.c */ | |
b18c6685 | 1042 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
dee26a9f | 1043 | struct btrfs_root *root, |
b18c6685 | 1044 | u64 objectid, u64 pos, u64 offset, |
3a686375 | 1045 | u64 disk_num_blocks, |
b18c6685 | 1046 | u64 num_blocks); |
dee26a9f CM |
1047 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
1048 | struct btrfs_root *root, | |
1049 | struct btrfs_path *path, u64 objectid, | |
9773a788 | 1050 | u64 blocknr, int mod); |
f254e52c CM |
1051 | int btrfs_csum_file_block(struct btrfs_trans_handle *trans, |
1052 | struct btrfs_root *root, | |
1053 | u64 objectid, u64 offset, | |
1054 | char *data, size_t len); | |
b18c6685 CM |
1055 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
1056 | struct btrfs_root *root, | |
1057 | struct btrfs_path *path, | |
1058 | u64 objectid, u64 offset, | |
1059 | int cow); | |
1de037a4 CM |
1060 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
1061 | struct btrfs_root *root, struct btrfs_path *path, | |
1062 | u64 isize); | |
39279cc3 | 1063 | /* inode.c */ |
9ebefb18 CM |
1064 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page); |
1065 | int btrfs_readpage(struct file *file, struct page *page); | |
39279cc3 CM |
1066 | void btrfs_delete_inode(struct inode *inode); |
1067 | void btrfs_read_locked_inode(struct inode *inode); | |
1068 | int btrfs_write_inode(struct inode *inode, int wait); | |
1069 | void btrfs_dirty_inode(struct inode *inode); | |
1070 | struct inode *btrfs_alloc_inode(struct super_block *sb); | |
1071 | void btrfs_destroy_inode(struct inode *inode); | |
1072 | int btrfs_init_cachep(void); | |
1073 | void btrfs_destroy_cachep(void); | |
34287aa3 | 1074 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
39279cc3 CM |
1075 | struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid, |
1076 | struct btrfs_root *root); | |
1077 | int btrfs_commit_write(struct file *file, struct page *page, | |
1078 | unsigned from, unsigned to); | |
a52d9a80 CM |
1079 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
1080 | size_t page_offset, u64 start, u64 end, | |
1081 | int create); | |
1082 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
1083 | struct btrfs_root *root, | |
1084 | struct inode *inode); | |
39279cc3 | 1085 | /* file.c */ |
a52d9a80 | 1086 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end); |
39279cc3 CM |
1087 | extern struct file_operations btrfs_file_operations; |
1088 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, | |
1089 | struct btrfs_root *root, struct inode *inode, | |
1090 | u64 start, u64 end, u64 *hint_block); | |
6702ed49 CM |
1091 | /* tree-defrag.c */ |
1092 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | |
1093 | struct btrfs_root *root, int cache_only); | |
58176a96 JB |
1094 | |
1095 | /* sysfs.c */ | |
1096 | int btrfs_init_sysfs(void); | |
1097 | void btrfs_exit_sysfs(void); | |
1098 | int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); | |
1099 | int btrfs_sysfs_add_root(struct btrfs_root *root); | |
1100 | void btrfs_sysfs_del_root(struct btrfs_root *root); | |
1101 | void btrfs_sysfs_del_super(struct btrfs_fs_info *root); | |
1102 | ||
eb60ceac | 1103 | #endif |