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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 CM |
273 | /* tag for the radix tree of block groups in ram */ |
274 | #define BTRFS_BLOCK_GROUP_DIRTY 0 | |
31f3c99b | 275 | #define BTRFS_BLOCK_GROUP_AVAIL 1 |
9078a3e1 | 276 | #define BTRFS_BLOCK_GROUP_SIZE (256 * 1024 * 1024) |
1e2677e0 CM |
277 | |
278 | ||
279 | #define BTRFS_BLOCK_GROUP_DATA 1 | |
9078a3e1 CM |
280 | struct btrfs_block_group_item { |
281 | __le64 used; | |
1e2677e0 | 282 | u8 flags; |
9078a3e1 CM |
283 | } __attribute__ ((__packed__)); |
284 | ||
285 | struct btrfs_block_group_cache { | |
286 | struct btrfs_key key; | |
287 | struct btrfs_block_group_item item; | |
3e1ad54f | 288 | struct radix_tree_root *radix; |
cd1bc465 CM |
289 | u64 first_free; |
290 | u64 last_alloc; | |
be744175 | 291 | u64 pinned; |
e37c9e69 | 292 | u64 last_prealloc; |
be744175 | 293 | int data; |
e37c9e69 | 294 | int cached; |
9078a3e1 CM |
295 | }; |
296 | ||
9f5fae2f | 297 | struct btrfs_fs_info { |
5f39d397 | 298 | u8 fsid[BTRFS_FSID_SIZE]; |
62e2749e CM |
299 | struct btrfs_root *extent_root; |
300 | struct btrfs_root *tree_root; | |
0f7d52f4 | 301 | struct radix_tree_root fs_roots_radix; |
8ef97622 | 302 | struct radix_tree_root pending_del_radix; |
62e2749e | 303 | struct radix_tree_root pinned_radix; |
9078a3e1 | 304 | struct radix_tree_root block_group_radix; |
be744175 | 305 | struct radix_tree_root block_group_data_radix; |
26b8003f | 306 | struct radix_tree_root extent_ins_radix; |
f510cfec | 307 | struct extent_map_tree free_space_cache; |
293ffd5f | 308 | u64 generation; |
15ee9bc7 | 309 | u64 last_trans_committed; |
79154b1b | 310 | struct btrfs_transaction *running_transaction; |
4b52dff6 | 311 | struct btrfs_super_block super_copy; |
5f39d397 | 312 | struct extent_buffer *sb_buffer; |
e20d96d6 | 313 | struct super_block *sb; |
d98237b3 | 314 | struct inode *btree_inode; |
79154b1b | 315 | struct mutex trans_mutex; |
d561c025 | 316 | struct mutex fs_mutex; |
8fd17795 | 317 | struct list_head trans_list; |
facda1e7 | 318 | struct list_head dead_roots; |
08607c1b | 319 | struct delayed_work trans_work; |
58176a96 JB |
320 | struct kobject super_kobj; |
321 | struct completion kobj_unregister; | |
e66f709b | 322 | int do_barriers; |
facda1e7 | 323 | int closing; |
9f5fae2f CM |
324 | }; |
325 | ||
326 | /* | |
327 | * in ram representation of the tree. extent_root is used for all allocations | |
f2458e1d | 328 | * and for the extent tree extent_root root. |
9f5fae2f CM |
329 | */ |
330 | struct btrfs_root { | |
5f39d397 CM |
331 | struct extent_buffer *node; |
332 | struct extent_buffer *commit_root; | |
62e2749e CM |
333 | struct btrfs_root_item root_item; |
334 | struct btrfs_key root_key; | |
9f5fae2f | 335 | struct btrfs_fs_info *fs_info; |
0f7d52f4 | 336 | struct inode *inode; |
58176a96 JB |
337 | struct kobject root_kobj; |
338 | struct completion kobj_unregister; | |
011410bd | 339 | struct rw_semaphore snap_sem; |
0f7d52f4 CM |
340 | u64 objectid; |
341 | u64 last_trans; | |
5f39d397 CM |
342 | |
343 | /* data allocations are done in sectorsize units */ | |
344 | u32 sectorsize; | |
345 | ||
346 | /* node allocations are done in nodesize units */ | |
347 | u32 nodesize; | |
348 | ||
349 | /* leaf allocations are done in leafsize units */ | |
350 | u32 leafsize; | |
351 | ||
9f5fae2f | 352 | u32 type; |
1b05da2e CM |
353 | u64 highest_inode; |
354 | u64 last_inode_alloc; | |
9f3a7427 | 355 | int ref_cows; |
6702ed49 CM |
356 | struct btrfs_key defrag_progress; |
357 | int defrag_running; | |
358 | int defrag_level; | |
58176a96 | 359 | char *name; |
62e2749e CM |
360 | }; |
361 | ||
1e1d2701 CM |
362 | /* |
363 | * inode items have the data typically returned from stat and store other | |
364 | * info about object characteristics. There is one for every file and dir in | |
365 | * the FS | |
366 | */ | |
9078a3e1 CM |
367 | #define BTRFS_INODE_ITEM_KEY 1 |
368 | ||
369 | /* reserve 2-15 close to the inode for later flexibility */ | |
1e1d2701 CM |
370 | |
371 | /* | |
372 | * dir items are the name -> inode pointers in a directory. There is one | |
373 | * for every name in a directory. | |
374 | */ | |
9078a3e1 CM |
375 | #define BTRFS_DIR_ITEM_KEY 16 |
376 | #define BTRFS_DIR_INDEX_KEY 17 | |
1e1d2701 | 377 | /* |
9078a3e1 | 378 | * extent data is for file data |
1e1d2701 | 379 | */ |
9078a3e1 | 380 | #define BTRFS_EXTENT_DATA_KEY 18 |
f254e52c CM |
381 | /* |
382 | * csum items have the checksums for data in the extents | |
383 | */ | |
9078a3e1 CM |
384 | #define BTRFS_CSUM_ITEM_KEY 19 |
385 | ||
386 | /* reserve 20-31 for other file stuff */ | |
f254e52c | 387 | |
1e1d2701 CM |
388 | /* |
389 | * root items point to tree roots. There are typically in the root | |
390 | * tree used by the super block to find all the other trees | |
391 | */ | |
9078a3e1 | 392 | #define BTRFS_ROOT_ITEM_KEY 32 |
1e1d2701 CM |
393 | /* |
394 | * extent items are in the extent map tree. These record which blocks | |
395 | * are used, and how many references there are to each block | |
396 | */ | |
9078a3e1 CM |
397 | #define BTRFS_EXTENT_ITEM_KEY 33 |
398 | ||
399 | /* | |
400 | * block groups give us hints into the extent allocation trees. Which | |
401 | * blocks are free etc etc | |
402 | */ | |
403 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 34 | |
9f5fae2f | 404 | |
1e1d2701 CM |
405 | /* |
406 | * string items are for debugging. They just store a short string of | |
407 | * data in the FS | |
408 | */ | |
9078a3e1 CM |
409 | #define BTRFS_STRING_ITEM_KEY 253 |
410 | ||
5f39d397 CM |
411 | /* some macros to generate set/get funcs for the struct fields. This |
412 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | |
413 | * one for u8: | |
414 | */ | |
415 | #define le8_to_cpu(v) (v) | |
416 | #define cpu_to_le8(v) (v) | |
417 | #define __le8 u8 | |
418 | ||
419 | #define read_eb_member(eb, ptr, type, member, result) ( \ | |
420 | read_extent_buffer(eb, (char *)(result), \ | |
421 | ((unsigned long)(ptr)) + \ | |
422 | offsetof(type, member), \ | |
423 | sizeof(((type *)0)->member))) | |
424 | ||
425 | #define write_eb_member(eb, ptr, type, member, result) ( \ | |
426 | write_extent_buffer(eb, (char *)(result), \ | |
427 | ((unsigned long)(ptr)) + \ | |
428 | offsetof(type, member), \ | |
429 | sizeof(((type *)0)->member))) | |
430 | ||
431 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ | |
432 | static inline u##bits btrfs_##name(struct extent_buffer *eb, \ | |
433 | type *s) \ | |
434 | { \ | |
479965d6 CM |
435 | int err; \ |
436 | char *map_token; \ | |
437 | char *kaddr; \ | |
438 | unsigned long map_start; \ | |
439 | unsigned long map_len; \ | |
440 | unsigned long offset = (unsigned long)s + \ | |
441 | offsetof(type, member); \ | |
442 | err = map_extent_buffer(eb, offset, \ | |
443 | sizeof(((type *)0)->member), \ | |
444 | &map_token, &kaddr, \ | |
445 | &map_start, &map_len, KM_USER0); \ | |
446 | if (!err) { \ | |
447 | __le##bits *tmp = (__le##bits *)(kaddr + offset - \ | |
448 | map_start); \ | |
449 | u##bits res = le##bits##_to_cpu(*tmp); \ | |
450 | unmap_extent_buffer(eb, map_token, KM_USER0); \ | |
451 | return res; \ | |
452 | } else { \ | |
453 | __le##bits res; \ | |
454 | read_eb_member(eb, s, type, member, &res); \ | |
455 | return le##bits##_to_cpu(res); \ | |
456 | } \ | |
5f39d397 CM |
457 | } \ |
458 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
459 | type *s, u##bits val) \ | |
460 | { \ | |
479965d6 CM |
461 | int err; \ |
462 | char *map_token; \ | |
463 | char *kaddr; \ | |
464 | unsigned long map_start; \ | |
465 | unsigned long map_len; \ | |
466 | unsigned long offset = (unsigned long)s + \ | |
467 | offsetof(type, member); \ | |
468 | err = map_extent_buffer(eb, offset, \ | |
469 | sizeof(((type *)0)->member), \ | |
470 | &map_token, &kaddr, \ | |
471 | &map_start, &map_len, KM_USER0); \ | |
472 | if (!err) { \ | |
473 | __le##bits *tmp = (__le##bits *)(kaddr + offset - \ | |
474 | map_start); \ | |
475 | *tmp = cpu_to_le##bits(val); \ | |
476 | unmap_extent_buffer(eb, map_token, KM_USER0); \ | |
477 | } else { \ | |
478 | val = cpu_to_le##bits(val); \ | |
479 | write_eb_member(eb, s, type, member, &val); \ | |
480 | } \ | |
5f39d397 CM |
481 | } |
482 | ||
483 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | |
484 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | |
485 | { \ | |
6d36dcd4 CM |
486 | int err; \ |
487 | char *map_token; \ | |
488 | char *kaddr; \ | |
489 | unsigned long map_start; \ | |
490 | unsigned long map_len; \ | |
491 | unsigned long offset = offsetof(type, member); \ | |
492 | err = map_extent_buffer(eb, offset, \ | |
493 | sizeof(((type *)0)->member), \ | |
494 | &map_token, &kaddr, \ | |
495 | &map_start, &map_len, KM_USER0); \ | |
496 | if (!err) { \ | |
497 | __le##bits *tmp = (__le##bits *)(kaddr + offset - \ | |
498 | map_start); \ | |
499 | u##bits res = le##bits##_to_cpu(*tmp); \ | |
500 | unmap_extent_buffer(eb, map_token, KM_USER0); \ | |
501 | return res; \ | |
502 | } else { \ | |
503 | __le##bits res; \ | |
504 | read_eb_member(eb, NULL, type, member, &res); \ | |
505 | return le##bits##_to_cpu(res); \ | |
506 | } \ | |
5f39d397 CM |
507 | } \ |
508 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
509 | u##bits val) \ | |
510 | { \ | |
6d36dcd4 CM |
511 | int err; \ |
512 | char *map_token; \ | |
513 | char *kaddr; \ | |
514 | unsigned long map_start; \ | |
515 | unsigned long map_len; \ | |
516 | unsigned long offset = offsetof(type, member); \ | |
517 | err = map_extent_buffer(eb, offset, \ | |
518 | sizeof(((type *)0)->member), \ | |
519 | &map_token, &kaddr, \ | |
520 | &map_start, &map_len, KM_USER0); \ | |
521 | if (!err) { \ | |
522 | __le##bits *tmp = (__le##bits *)(kaddr + offset - \ | |
523 | map_start); \ | |
524 | *tmp = cpu_to_le##bits(val); \ | |
525 | unmap_extent_buffer(eb, map_token, KM_USER0); \ | |
526 | } else { \ | |
527 | val = cpu_to_le##bits(val); \ | |
528 | write_eb_member(eb, NULL, type, member, &val); \ | |
529 | } \ | |
5f39d397 | 530 | } |
9078a3e1 | 531 | |
5f39d397 CM |
532 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
533 | static inline u##bits btrfs_##name(type *s) \ | |
534 | { \ | |
535 | return le##bits##_to_cpu(s->member); \ | |
536 | } \ | |
537 | static inline void btrfs_set_##name(type *s, u##bits val) \ | |
538 | { \ | |
539 | s->member = cpu_to_le##bits(val); \ | |
1e1d2701 CM |
540 | } |
541 | ||
5f39d397 CM |
542 | /* struct btrfs_block_group_item */ |
543 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | |
544 | used, 64); | |
545 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | |
546 | used, 64); | |
1e1d2701 | 547 | |
5f39d397 CM |
548 | /* struct btrfs_inode_item */ |
549 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | |
550 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); | |
551 | BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64); | |
552 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); | |
553 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | |
554 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | |
555 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | |
556 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | |
557 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 32); | |
558 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16); | |
559 | BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item, | |
560 | compat_flags, 16); | |
1e1d2701 | 561 | |
5f39d397 CM |
562 | static inline struct btrfs_inode_timespec * |
563 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) | |
1e1d2701 | 564 | { |
5f39d397 CM |
565 | unsigned long ptr = (unsigned long)inode_item; |
566 | ptr += offsetof(struct btrfs_inode_item, atime); | |
567 | return (struct btrfs_inode_timespec *)ptr; | |
1e1d2701 CM |
568 | } |
569 | ||
5f39d397 CM |
570 | static inline struct btrfs_inode_timespec * |
571 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) | |
1e1d2701 | 572 | { |
5f39d397 CM |
573 | unsigned long ptr = (unsigned long)inode_item; |
574 | ptr += offsetof(struct btrfs_inode_item, mtime); | |
575 | return (struct btrfs_inode_timespec *)ptr; | |
1e1d2701 CM |
576 | } |
577 | ||
5f39d397 CM |
578 | static inline struct btrfs_inode_timespec * |
579 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) | |
1e1d2701 | 580 | { |
5f39d397 CM |
581 | unsigned long ptr = (unsigned long)inode_item; |
582 | ptr += offsetof(struct btrfs_inode_item, ctime); | |
583 | return (struct btrfs_inode_timespec *)ptr; | |
1e1d2701 CM |
584 | } |
585 | ||
5f39d397 CM |
586 | static inline struct btrfs_inode_timespec * |
587 | btrfs_inode_otime(struct btrfs_inode_item *inode_item) | |
1e1d2701 | 588 | { |
5f39d397 CM |
589 | unsigned long ptr = (unsigned long)inode_item; |
590 | ptr += offsetof(struct btrfs_inode_item, otime); | |
591 | return (struct btrfs_inode_timespec *)ptr; | |
1e1d2701 CM |
592 | } |
593 | ||
5f39d397 CM |
594 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_inode_timespec, sec, 64); |
595 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_inode_timespec, nsec, 32); | |
e20d96d6 | 596 | |
5f39d397 CM |
597 | /* struct btrfs_extent_item */ |
598 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32); | |
599 | BTRFS_SETGET_FUNCS(extent_owner, struct btrfs_extent_item, owner, 32); | |
e20d96d6 | 600 | |
5f39d397 CM |
601 | BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, |
602 | refs, 32); | |
603 | BTRFS_SETGET_STACK_FUNCS(stack_extent_owner, struct btrfs_extent_item, | |
604 | owner, 32); | |
e20d96d6 | 605 | |
5f39d397 CM |
606 | /* struct btrfs_node */ |
607 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | |
e20d96d6 | 608 | |
5f39d397 | 609 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
cf27e1ee | 610 | { |
5f39d397 CM |
611 | unsigned long ptr; |
612 | ptr = offsetof(struct btrfs_node, ptrs) + | |
613 | sizeof(struct btrfs_key_ptr) * nr; | |
614 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | |
cf27e1ee CM |
615 | } |
616 | ||
5f39d397 CM |
617 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
618 | int nr, u64 val) | |
cf27e1ee | 619 | { |
5f39d397 CM |
620 | unsigned long ptr; |
621 | ptr = offsetof(struct btrfs_node, ptrs) + | |
622 | sizeof(struct btrfs_key_ptr) * nr; | |
623 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | |
cf27e1ee CM |
624 | } |
625 | ||
5f39d397 | 626 | static unsigned long btrfs_node_key_ptr_offset(int nr) |
4d775673 | 627 | { |
5f39d397 CM |
628 | return offsetof(struct btrfs_node, ptrs) + |
629 | sizeof(struct btrfs_key_ptr) * nr; | |
4d775673 CM |
630 | } |
631 | ||
5f39d397 CM |
632 | static void btrfs_node_key(struct extent_buffer *eb, |
633 | struct btrfs_disk_key *disk_key, int nr) | |
4d775673 | 634 | { |
5f39d397 CM |
635 | unsigned long ptr; |
636 | ptr = btrfs_node_key_ptr_offset(nr); | |
637 | read_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
638 | struct btrfs_key_ptr, key, disk_key); | |
4d775673 | 639 | } |
5f39d397 CM |
640 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
641 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f8a0c | 642 | { |
5f39d397 CM |
643 | unsigned long ptr; |
644 | ptr = btrfs_node_key_ptr_offset(nr); | |
645 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
646 | struct btrfs_key_ptr, key, disk_key); | |
1d4f8a0c CM |
647 | } |
648 | ||
5f39d397 CM |
649 | /* struct btrfs_item */ |
650 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | |
651 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | |
4d775673 | 652 | |
5f39d397 | 653 | static inline unsigned long btrfs_item_nr_offset(int nr) |
1d4f8a0c | 654 | { |
5f39d397 CM |
655 | return offsetof(struct btrfs_leaf, items) + |
656 | sizeof(struct btrfs_item) * nr; | |
1d4f8a0c CM |
657 | } |
658 | ||
5f39d397 CM |
659 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
660 | int nr) | |
0783fcfc | 661 | { |
5f39d397 | 662 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
0783fcfc CM |
663 | } |
664 | ||
5f39d397 CM |
665 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
666 | struct btrfs_item *item) | |
0783fcfc | 667 | { |
5f39d397 | 668 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
0783fcfc CM |
669 | } |
670 | ||
5f39d397 | 671 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 672 | { |
5f39d397 | 673 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
674 | } |
675 | ||
5f39d397 | 676 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 677 | { |
5f39d397 | 678 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
679 | } |
680 | ||
5f39d397 | 681 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 682 | { |
5f39d397 | 683 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
684 | } |
685 | ||
5f39d397 CM |
686 | static inline void btrfs_item_key(struct extent_buffer *eb, |
687 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 688 | { |
5f39d397 CM |
689 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
690 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
691 | } |
692 | ||
5f39d397 CM |
693 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
694 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 695 | { |
5f39d397 CM |
696 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
697 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
698 | } |
699 | ||
5f39d397 CM |
700 | /* struct btrfs_dir_item */ |
701 | BTRFS_SETGET_FUNCS(dir_flags, struct btrfs_dir_item, flags, 16); | |
702 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); | |
703 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | |
1d4f6404 | 704 | |
5f39d397 CM |
705 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
706 | struct btrfs_dir_item *item, | |
707 | struct btrfs_disk_key *key) | |
1d4f6404 | 708 | { |
5f39d397 | 709 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
1d4f6404 CM |
710 | } |
711 | ||
5f39d397 CM |
712 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
713 | struct btrfs_dir_item *item, | |
714 | struct btrfs_disk_key *key) | |
a8a2ee0c | 715 | { |
5f39d397 | 716 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
a8a2ee0c CM |
717 | } |
718 | ||
5f39d397 CM |
719 | /* struct btrfs_disk_key */ |
720 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | |
721 | objectid, 64); | |
722 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | |
723 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | |
1d4f6404 | 724 | |
e2fa7227 CM |
725 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
726 | struct btrfs_disk_key *disk) | |
727 | { | |
728 | cpu->offset = le64_to_cpu(disk->offset); | |
5f39d397 | 729 | cpu->type = disk->type; |
e2fa7227 CM |
730 | cpu->objectid = le64_to_cpu(disk->objectid); |
731 | } | |
732 | ||
733 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
734 | struct btrfs_key *cpu) | |
735 | { | |
736 | disk->offset = cpu_to_le64(cpu->offset); | |
5f39d397 | 737 | disk->type = cpu->type; |
e2fa7227 CM |
738 | disk->objectid = cpu_to_le64(cpu->objectid); |
739 | } | |
740 | ||
5f39d397 CM |
741 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
742 | struct btrfs_key *key, int nr) | |
7f5c1516 | 743 | { |
5f39d397 CM |
744 | struct btrfs_disk_key disk_key; |
745 | btrfs_node_key(eb, &disk_key, nr); | |
746 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
747 | } |
748 | ||
5f39d397 CM |
749 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
750 | struct btrfs_key *key, int nr) | |
7f5c1516 | 751 | { |
5f39d397 CM |
752 | struct btrfs_disk_key disk_key; |
753 | btrfs_item_key(eb, &disk_key, nr); | |
754 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
755 | } |
756 | ||
5f39d397 CM |
757 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
758 | struct btrfs_dir_item *item, | |
759 | struct btrfs_key *key) | |
4d775673 | 760 | { |
5f39d397 CM |
761 | struct btrfs_disk_key disk_key; |
762 | btrfs_dir_item_key(eb, item, &disk_key); | |
763 | btrfs_disk_key_to_cpu(key, &disk_key); | |
4d775673 CM |
764 | } |
765 | ||
58176a96 | 766 | |
5f39d397 | 767 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
3768f368 | 768 | { |
5f39d397 | 769 | return key->type; |
3768f368 CM |
770 | } |
771 | ||
5f39d397 | 772 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
3768f368 | 773 | { |
5f39d397 | 774 | key->type = val; |
3768f368 CM |
775 | } |
776 | ||
5f39d397 CM |
777 | /* struct btrfs_header */ |
778 | BTRFS_SETGET_HEADER_FUNCS(header_blocknr, struct btrfs_header, blocknr, 64); | |
779 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, | |
780 | generation, 64); | |
781 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | |
782 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | |
783 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 16); | |
784 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); | |
0f7d52f4 | 785 | |
5f39d397 | 786 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
0f7d52f4 | 787 | { |
5f39d397 CM |
788 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
789 | return (u8 *)ptr; | |
0f7d52f4 CM |
790 | } |
791 | ||
5f39d397 | 792 | static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) |
3768f368 | 793 | { |
5f39d397 CM |
794 | unsigned long ptr = offsetof(struct btrfs_super_block, fsid); |
795 | return (u8 *)ptr; | |
3768f368 CM |
796 | } |
797 | ||
5f39d397 | 798 | static inline u8 *btrfs_header_csum(struct extent_buffer *eb) |
3768f368 | 799 | { |
5f39d397 CM |
800 | unsigned long ptr = offsetof(struct btrfs_header, csum); |
801 | return (u8 *)ptr; | |
3768f368 CM |
802 | } |
803 | ||
5f39d397 | 804 | static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) |
3768f368 | 805 | { |
5f39d397 | 806 | return NULL; |
3768f368 CM |
807 | } |
808 | ||
5f39d397 | 809 | static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) |
3768f368 | 810 | { |
5f39d397 | 811 | return NULL; |
3768f368 CM |
812 | } |
813 | ||
5f39d397 | 814 | static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) |
3768f368 | 815 | { |
5f39d397 | 816 | return NULL; |
3768f368 CM |
817 | } |
818 | ||
5f39d397 | 819 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
3768f368 | 820 | { |
5f39d397 | 821 | return (btrfs_header_level(eb) == 0); |
3768f368 CM |
822 | } |
823 | ||
5f39d397 CM |
824 | /* struct btrfs_root_item */ |
825 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); | |
826 | BTRFS_SETGET_FUNCS(disk_root_blocknr, struct btrfs_root_item, blocknr, 64); | |
3768f368 | 827 | |
5f39d397 CM |
828 | BTRFS_SETGET_STACK_FUNCS(root_blocknr, struct btrfs_root_item, blocknr, 64); |
829 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); | |
830 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | |
831 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32); | |
832 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, blocks_used, 64); | |
833 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, block_limit, 64); | |
123abc88 | 834 | |
5f39d397 CM |
835 | /* struct btrfs_super_block */ |
836 | BTRFS_SETGET_STACK_FUNCS(super_blocknr, struct btrfs_super_block, blocknr, 64); | |
837 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, | |
838 | generation, 64); | |
839 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | |
840 | BTRFS_SETGET_STACK_FUNCS(super_total_blocks, struct btrfs_super_block, | |
841 | total_blocks, 64); | |
842 | BTRFS_SETGET_STACK_FUNCS(super_blocks_used, struct btrfs_super_block, | |
843 | blocks_used, 64); | |
844 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, | |
845 | sectorsize, 32); | |
846 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | |
847 | nodesize, 32); | |
848 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, | |
849 | leafsize, 32); | |
850 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, | |
851 | root_dir_objectid, 64); | |
2e635a27 | 852 | |
5f39d397 | 853 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
2e635a27 | 854 | { |
5f39d397 | 855 | return offsetof(struct btrfs_leaf, items); |
2e635a27 CM |
856 | } |
857 | ||
5f39d397 CM |
858 | /* struct btrfs_file_extent_item */ |
859 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | |
9f5fae2f | 860 | |
5f39d397 | 861 | static inline unsigned long btrfs_file_extent_inline_start(struct |
236454df CM |
862 | btrfs_file_extent_item *e) |
863 | { | |
5f39d397 CM |
864 | unsigned long offset = (unsigned long)e; |
865 | offset += offsetof(struct btrfs_file_extent_item, disk_blocknr); | |
866 | return offset; | |
236454df CM |
867 | } |
868 | ||
869 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
870 | { | |
5f39d397 | 871 | return offsetof(struct btrfs_file_extent_item, disk_blocknr) + datasize; |
9f5fae2f CM |
872 | } |
873 | ||
5f39d397 CM |
874 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, |
875 | struct btrfs_item *e) | |
9f5fae2f | 876 | { |
5f39d397 CM |
877 | unsigned long offset; |
878 | offset = offsetof(struct btrfs_file_extent_item, disk_blocknr); | |
879 | return btrfs_item_size(eb, e) - offset; | |
9f5fae2f CM |
880 | } |
881 | ||
5f39d397 CM |
882 | BTRFS_SETGET_FUNCS(file_extent_disk_blocknr, struct btrfs_file_extent_item, |
883 | disk_blocknr, 64); | |
884 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, | |
885 | generation, 64); | |
886 | BTRFS_SETGET_FUNCS(file_extent_disk_num_blocks, struct btrfs_file_extent_item, | |
887 | disk_num_blocks, 64); | |
888 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, | |
889 | offset, 64); | |
890 | BTRFS_SETGET_FUNCS(file_extent_num_blocks, struct btrfs_file_extent_item, | |
891 | num_blocks, 64); | |
9f5fae2f | 892 | |
e20d96d6 CM |
893 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
894 | { | |
895 | return sb->s_fs_info; | |
896 | } | |
897 | ||
58176a96 JB |
898 | static inline int btrfs_set_root_name(struct btrfs_root *root, |
899 | const char *name, int len) | |
900 | { | |
901 | /* if we already have a name just free it */ | |
902 | if (root->name) | |
903 | kfree(root->name); | |
904 | ||
905 | root->name = kmalloc(len+1, GFP_KERNEL); | |
906 | if (!root->name) | |
907 | return -ENOMEM; | |
908 | ||
909 | memcpy(root->name, name, len); | |
910 | root->name[len] ='\0'; | |
911 | ||
912 | return 0; | |
913 | } | |
914 | ||
4beb1b8b CM |
915 | /* helper function to cast into the data area of the leaf. */ |
916 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 | 917 | ((type *)(btrfs_leaf_data(leaf) + \ |
5f39d397 CM |
918 | btrfs_item_offset_nr(leaf, slot))) |
919 | ||
920 | #define btrfs_item_ptr_offset(leaf, slot) \ | |
921 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | |
922 | btrfs_item_offset_nr(leaf, slot))) | |
4beb1b8b | 923 | |
95e05289 CM |
924 | /* mount option defines and helpers */ |
925 | #define BTRFS_MOUNT_SUBVOL 0x000001 | |
926 | #define btrfs_clear_opt(o, opt) o &= ~BTRFS_MOUNT_##opt | |
927 | #define btrfs_set_opt(o, opt) o |= BTRFS_MOUNT_##opt | |
928 | #define btrfs_test_opt(sb, opt) (BTRFS_SB(sb)->s_mount_opt & \ | |
929 | BTRFS_MOUNT_##opt) | |
b18c6685 | 930 | /* extent-tree.c */ |
e9d0b13b CM |
931 | int btrfs_extent_post_op(struct btrfs_trans_handle *trans, |
932 | struct btrfs_root *root); | |
ccd467d6 | 933 | int btrfs_copy_pinned(struct btrfs_root *root, struct radix_tree_root *copy); |
5276aeda CM |
934 | struct btrfs_block_group_cache *btrfs_lookup_block_group(struct |
935 | btrfs_fs_info *info, | |
936 | u64 blocknr); | |
31f3c99b CM |
937 | struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root, |
938 | struct btrfs_block_group_cache | |
be744175 | 939 | *hint, u64 search_start, |
de428b63 | 940 | int data, int owner); |
c5739bba CM |
941 | int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, |
942 | struct btrfs_root *root); | |
5f39d397 | 943 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
6702ed49 CM |
944 | struct btrfs_root *root, u64 hint, |
945 | u64 empty_size); | |
4d775673 CM |
946 | int btrfs_alloc_extent(struct btrfs_trans_handle *trans, |
947 | struct btrfs_root *root, u64 owner, | |
6702ed49 | 948 | u64 num_blocks, u64 empty_size, u64 search_start, |
be08c1b9 | 949 | u64 search_end, struct btrfs_key *ins, int data); |
e089f05c | 950 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
5f39d397 | 951 | struct extent_buffer *buf); |
e089f05c CM |
952 | int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
953 | *root, u64 blocknr, u64 num_blocks, int pin); | |
ccd467d6 CM |
954 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
955 | struct btrfs_root *root, | |
956 | struct radix_tree_root *unpin_radix); | |
b18c6685 CM |
957 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
958 | struct btrfs_root *root, | |
959 | u64 blocknr, u64 num_blocks); | |
9078a3e1 CM |
960 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
961 | struct btrfs_root *root); | |
962 | int btrfs_free_block_groups(struct btrfs_fs_info *info); | |
963 | int btrfs_read_block_groups(struct btrfs_root *root); | |
dee26a9f | 964 | /* ctree.c */ |
5f39d397 CM |
965 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
966 | struct btrfs_root *root, struct extent_buffer *buf, | |
967 | struct extent_buffer *parent, int parent_slot, | |
968 | struct extent_buffer **cow_ret); | |
6567e837 CM |
969 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
970 | *root, struct btrfs_path *path, u32 data_size); | |
b18c6685 CM |
971 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
972 | struct btrfs_root *root, | |
973 | struct btrfs_path *path, | |
974 | u32 new_size); | |
e089f05c CM |
975 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
976 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
977 | ins_len, int cow); | |
6702ed49 | 978 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
5f39d397 | 979 | struct btrfs_root *root, struct extent_buffer *parent, |
e9d0b13b | 980 | int cache_only, u64 *last_ret); |
234b63a0 | 981 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
2c90e5d6 CM |
982 | struct btrfs_path *btrfs_alloc_path(void); |
983 | void btrfs_free_path(struct btrfs_path *p); | |
234b63a0 | 984 | void btrfs_init_path(struct btrfs_path *p); |
e089f05c CM |
985 | int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
986 | struct btrfs_path *path); | |
987 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root | |
988 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
989 | int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root | |
990 | *root, struct btrfs_path *path, struct btrfs_key | |
991 | *cpu_key, u32 data_size); | |
234b63a0 | 992 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
5f39d397 | 993 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
e089f05c | 994 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
9f3a7427 | 995 | *root); |
dee26a9f | 996 | /* root-item.c */ |
e089f05c CM |
997 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
998 | struct btrfs_key *key); | |
999 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
1000 | *root, struct btrfs_key *key, struct btrfs_root_item | |
1001 | *item); | |
1002 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
1003 | *root, struct btrfs_key *key, struct btrfs_root_item | |
1004 | *item); | |
1005 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct | |
1006 | btrfs_root_item *item, struct btrfs_key *key); | |
5ce14bbc CM |
1007 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid, |
1008 | struct btrfs_root *latest_root); | |
dee26a9f | 1009 | /* dir-item.c */ |
e089f05c | 1010 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
1011 | *root, const char *name, int name_len, u64 dir, |
1012 | struct btrfs_key *location, u8 type); | |
7e38180e CM |
1013 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
1014 | struct btrfs_root *root, | |
1015 | struct btrfs_path *path, u64 dir, | |
1016 | const char *name, int name_len, | |
1017 | int mod); | |
1018 | struct btrfs_dir_item * | |
1019 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | |
1020 | struct btrfs_root *root, | |
1021 | struct btrfs_path *path, u64 dir, | |
1022 | u64 objectid, const char *name, int name_len, | |
1023 | int mod); | |
1024 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, | |
1025 | struct btrfs_path *path, | |
7f5c1516 | 1026 | const char *name, int name_len); |
7e38180e CM |
1027 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
1028 | struct btrfs_root *root, | |
1029 | struct btrfs_path *path, | |
1030 | struct btrfs_dir_item *di); | |
dee26a9f | 1031 | /* inode-map.c */ |
9f5fae2f CM |
1032 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
1033 | struct btrfs_root *fs_root, | |
1034 | u64 dirid, u64 *objectid); | |
5be6f7f1 CM |
1035 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
1036 | ||
dee26a9f | 1037 | /* inode-item.c */ |
5f39d397 CM |
1038 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
1039 | struct btrfs_root *root, | |
1040 | struct btrfs_path *path, u64 objectid); | |
293ffd5f | 1041 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
1042 | *root, struct btrfs_path *path, |
1043 | struct btrfs_key *location, int mod); | |
dee26a9f CM |
1044 | |
1045 | /* file-item.c */ | |
b18c6685 | 1046 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
dee26a9f | 1047 | struct btrfs_root *root, |
b18c6685 | 1048 | u64 objectid, u64 pos, u64 offset, |
3a686375 | 1049 | u64 disk_num_blocks, |
b18c6685 | 1050 | u64 num_blocks); |
dee26a9f CM |
1051 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
1052 | struct btrfs_root *root, | |
1053 | struct btrfs_path *path, u64 objectid, | |
9773a788 | 1054 | u64 blocknr, int mod); |
f254e52c CM |
1055 | int btrfs_csum_file_block(struct btrfs_trans_handle *trans, |
1056 | struct btrfs_root *root, | |
1057 | u64 objectid, u64 offset, | |
1058 | char *data, size_t len); | |
b18c6685 CM |
1059 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
1060 | struct btrfs_root *root, | |
1061 | struct btrfs_path *path, | |
1062 | u64 objectid, u64 offset, | |
1063 | int cow); | |
1de037a4 CM |
1064 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
1065 | struct btrfs_root *root, struct btrfs_path *path, | |
1066 | u64 isize); | |
39279cc3 | 1067 | /* inode.c */ |
9ebefb18 CM |
1068 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page); |
1069 | int btrfs_readpage(struct file *file, struct page *page); | |
39279cc3 CM |
1070 | void btrfs_delete_inode(struct inode *inode); |
1071 | void btrfs_read_locked_inode(struct inode *inode); | |
1072 | int btrfs_write_inode(struct inode *inode, int wait); | |
1073 | void btrfs_dirty_inode(struct inode *inode); | |
1074 | struct inode *btrfs_alloc_inode(struct super_block *sb); | |
1075 | void btrfs_destroy_inode(struct inode *inode); | |
1076 | int btrfs_init_cachep(void); | |
1077 | void btrfs_destroy_cachep(void); | |
34287aa3 | 1078 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
39279cc3 CM |
1079 | struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid, |
1080 | struct btrfs_root *root); | |
1081 | int btrfs_commit_write(struct file *file, struct page *page, | |
1082 | unsigned from, unsigned to); | |
a52d9a80 CM |
1083 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
1084 | size_t page_offset, u64 start, u64 end, | |
1085 | int create); | |
1086 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
1087 | struct btrfs_root *root, | |
1088 | struct inode *inode); | |
39279cc3 | 1089 | /* file.c */ |
a52d9a80 | 1090 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end); |
39279cc3 CM |
1091 | extern struct file_operations btrfs_file_operations; |
1092 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, | |
1093 | struct btrfs_root *root, struct inode *inode, | |
1094 | u64 start, u64 end, u64 *hint_block); | |
6702ed49 CM |
1095 | /* tree-defrag.c */ |
1096 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | |
1097 | struct btrfs_root *root, int cache_only); | |
58176a96 JB |
1098 | |
1099 | /* sysfs.c */ | |
1100 | int btrfs_init_sysfs(void); | |
1101 | void btrfs_exit_sysfs(void); | |
1102 | int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); | |
1103 | int btrfs_sysfs_add_root(struct btrfs_root *root); | |
1104 | void btrfs_sysfs_del_root(struct btrfs_root *root); | |
1105 | void btrfs_sysfs_del_super(struct btrfs_fs_info *root); | |
1106 | ||
eb60ceac | 1107 | #endif |