Commit | Line | Data |
---|---|---|
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 | ||
dc17ff8f CM |
19 | #ifndef __BTRFS_CTREE__ |
20 | #define __BTRFS_CTREE__ | |
eb60ceac | 21 | |
6da6abae | 22 | #include <linux/version.h> |
810191ff CM |
23 | #include <linux/mm.h> |
24 | #include <linux/highmem.h> | |
e20d96d6 | 25 | #include <linux/fs.h> |
08607c1b | 26 | #include <linux/workqueue.h> |
58176a96 | 27 | #include <linux/completion.h> |
04160088 | 28 | #include <linux/backing-dev.h> |
479965d6 | 29 | #include <asm/kmap_types.h> |
8ef97622 | 30 | #include "bit-radix.h" |
d1310b2e | 31 | #include "extent_io.h" |
5f39d397 | 32 | #include "extent_map.h" |
e20d96d6 | 33 | |
e089f05c | 34 | struct btrfs_trans_handle; |
79154b1b | 35 | struct btrfs_transaction; |
35b7e476 CM |
36 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
37 | extern struct kmem_cache *btrfs_transaction_cachep; | |
38 | extern struct kmem_cache *btrfs_bit_radix_cachep; | |
2c90e5d6 | 39 | extern struct kmem_cache *btrfs_path_cachep; |
e089f05c | 40 | |
8a4b83cc | 41 | #define BTRFS_MAGIC "_B5RfS_M" |
eb60ceac | 42 | |
f6dbff55 | 43 | #define BTRFS_MAX_LEVEL 8 |
0b86a832 CM |
44 | |
45 | /* holds pointers to all of the tree roots */ | |
6407bf6d | 46 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
0b86a832 CM |
47 | |
48 | /* stores information about which extents are in use, and reference counts */ | |
0cf6c620 | 49 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
0b86a832 | 50 | |
0b86a832 CM |
51 | /* |
52 | * chunk tree stores translations from logical -> physical block numbering | |
53 | * the super block points to the chunk tree | |
54 | */ | |
e085def2 | 55 | #define BTRFS_CHUNK_TREE_OBJECTID 3ULL |
0b86a832 CM |
56 | |
57 | /* | |
58 | * stores information about which areas of a given device are in use. | |
59 | * one per device. The tree of tree roots points to the device tree | |
60 | */ | |
e085def2 CM |
61 | #define BTRFS_DEV_TREE_OBJECTID 4ULL |
62 | ||
63 | /* one per subvolume, storing files and directories */ | |
64 | #define BTRFS_FS_TREE_OBJECTID 5ULL | |
65 | ||
66 | /* directory objectid inside the root tree */ | |
67 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL | |
0b86a832 CM |
68 | |
69 | /* | |
70 | * All files have objectids higher than this. | |
71 | */ | |
f6dbff55 | 72 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
e17cade2 | 73 | #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL |
3768f368 | 74 | |
0b86a832 CM |
75 | |
76 | /* | |
77 | * the device items go into the chunk tree. The key is in the form | |
78 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] | |
79 | */ | |
80 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL | |
81 | ||
e20d96d6 CM |
82 | /* |
83 | * we can actually store much bigger names, but lets not confuse the rest | |
84 | * of linux | |
85 | */ | |
86 | #define BTRFS_NAME_LEN 255 | |
87 | ||
f254e52c CM |
88 | /* 32 bytes in various csum fields */ |
89 | #define BTRFS_CSUM_SIZE 32 | |
509659cd CM |
90 | /* four bytes for CRC32 */ |
91 | #define BTRFS_CRC32_SIZE 4 | |
3954401f | 92 | #define BTRFS_EMPTY_DIR_SIZE 0 |
f254e52c | 93 | |
fabb5681 CM |
94 | #define BTRFS_FT_UNKNOWN 0 |
95 | #define BTRFS_FT_REG_FILE 1 | |
96 | #define BTRFS_FT_DIR 2 | |
97 | #define BTRFS_FT_CHRDEV 3 | |
98 | #define BTRFS_FT_BLKDEV 4 | |
99 | #define BTRFS_FT_FIFO 5 | |
100 | #define BTRFS_FT_SOCK 6 | |
101 | #define BTRFS_FT_SYMLINK 7 | |
5103e947 JB |
102 | #define BTRFS_FT_XATTR 8 |
103 | #define BTRFS_FT_MAX 9 | |
fabb5681 | 104 | |
fec577fb CM |
105 | /* |
106 | * the key defines the order in the tree, and so it also defines (optimal) | |
107 | * block layout. objectid corresonds to the inode number. The flags | |
108 | * tells us things about the object, and is a kind of stream selector. | |
109 | * so for a given inode, keys with flags of 1 might refer to the inode | |
110 | * data, flags of 2 may point to file data in the btree and flags == 3 | |
111 | * may point to extents. | |
112 | * | |
113 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
114 | * |
115 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
116 | * in cpu native order. Otherwise they are identical and their sizes | |
117 | * should be the same (ie both packed) | |
fec577fb | 118 | */ |
e2fa7227 CM |
119 | struct btrfs_disk_key { |
120 | __le64 objectid; | |
5f39d397 | 121 | u8 type; |
70b2befd | 122 | __le64 offset; |
e2fa7227 CM |
123 | } __attribute__ ((__packed__)); |
124 | ||
125 | struct btrfs_key { | |
eb60ceac | 126 | u64 objectid; |
5f39d397 | 127 | u8 type; |
70b2befd | 128 | u64 offset; |
eb60ceac CM |
129 | } __attribute__ ((__packed__)); |
130 | ||
0b86a832 CM |
131 | struct btrfs_mapping_tree { |
132 | struct extent_map_tree map_tree; | |
133 | }; | |
134 | ||
e17cade2 | 135 | #define BTRFS_UUID_SIZE 16 |
0b86a832 CM |
136 | struct btrfs_dev_item { |
137 | /* the internal btrfs device id */ | |
138 | __le64 devid; | |
139 | ||
140 | /* size of the device */ | |
141 | __le64 total_bytes; | |
142 | ||
143 | /* bytes used */ | |
144 | __le64 bytes_used; | |
145 | ||
146 | /* optimal io alignment for this device */ | |
147 | __le32 io_align; | |
148 | ||
149 | /* optimal io width for this device */ | |
150 | __le32 io_width; | |
151 | ||
152 | /* minimal io size for this device */ | |
153 | __le32 sector_size; | |
154 | ||
0b86a832 CM |
155 | /* type and info about this device */ |
156 | __le64 type; | |
157 | ||
e17cade2 CM |
158 | /* grouping information for allocation decisions */ |
159 | __le32 dev_group; | |
160 | ||
161 | /* seek speed 0-100 where 100 is fastest */ | |
162 | u8 seek_speed; | |
163 | ||
164 | /* bandwidth 0-100 where 100 is fastest */ | |
165 | u8 bandwidth; | |
166 | ||
0d81ba5d | 167 | /* btrfs generated uuid for this device */ |
e17cade2 | 168 | u8 uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
169 | } __attribute__ ((__packed__)); |
170 | ||
171 | struct btrfs_stripe { | |
172 | __le64 devid; | |
173 | __le64 offset; | |
e17cade2 | 174 | u8 dev_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
175 | } __attribute__ ((__packed__)); |
176 | ||
177 | struct btrfs_chunk { | |
e17cade2 CM |
178 | /* size of this chunk in bytes */ |
179 | __le64 length; | |
180 | ||
181 | /* objectid of the root referencing this chunk */ | |
0b86a832 | 182 | __le64 owner; |
e17cade2 | 183 | |
0b86a832 CM |
184 | __le64 stripe_len; |
185 | __le64 type; | |
186 | ||
187 | /* optimal io alignment for this chunk */ | |
188 | __le32 io_align; | |
189 | ||
190 | /* optimal io width for this chunk */ | |
191 | __le32 io_width; | |
192 | ||
193 | /* minimal io size for this chunk */ | |
194 | __le32 sector_size; | |
195 | ||
196 | /* 2^16 stripes is quite a lot, a second limit is the size of a single | |
197 | * item in the btree | |
198 | */ | |
199 | __le16 num_stripes; | |
321aecc6 CM |
200 | |
201 | /* sub stripes only matter for raid10 */ | |
202 | __le16 sub_stripes; | |
0b86a832 CM |
203 | struct btrfs_stripe stripe; |
204 | /* additional stripes go here */ | |
205 | } __attribute__ ((__packed__)); | |
206 | ||
207 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) | |
208 | { | |
209 | BUG_ON(num_stripes == 0); | |
210 | return sizeof(struct btrfs_chunk) + | |
211 | sizeof(struct btrfs_stripe) * (num_stripes - 1); | |
212 | } | |
213 | ||
5f39d397 | 214 | #define BTRFS_FSID_SIZE 16 |
63b10fc4 CM |
215 | #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0) |
216 | ||
fec577fb CM |
217 | /* |
218 | * every tree block (leaf or node) starts with this header. | |
219 | */ | |
bb492bb0 | 220 | struct btrfs_header { |
e17cade2 | 221 | /* these first four must match the super block */ |
f254e52c | 222 | u8 csum[BTRFS_CSUM_SIZE]; |
5f39d397 | 223 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 224 | __le64 bytenr; /* which block this node is supposed to live in */ |
63b10fc4 | 225 | __le64 flags; |
e17cade2 CM |
226 | |
227 | /* allowed to be different from the super from here on down */ | |
228 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; | |
7f5c1516 | 229 | __le64 generation; |
4d775673 | 230 | __le64 owner; |
5f39d397 | 231 | __le32 nritems; |
9a6f11ed | 232 | u8 level; |
eb60ceac CM |
233 | } __attribute__ ((__packed__)); |
234 | ||
5f39d397 | 235 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
123abc88 | 236 | sizeof(struct btrfs_header)) / \ |
74493f7a | 237 | sizeof(struct btrfs_key_ptr)) |
123abc88 | 238 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
5f39d397 | 239 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
236454df CM |
240 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
241 | sizeof(struct btrfs_item) - \ | |
242 | sizeof(struct btrfs_file_extent_item)) | |
eb60ceac | 243 | |
0b86a832 CM |
244 | |
245 | /* | |
246 | * this is a very generous portion of the super block, giving us | |
247 | * room to translate 14 chunks with 3 stripes each. | |
248 | */ | |
249 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 | |
250 | ||
fec577fb CM |
251 | /* |
252 | * the super block basically lists the main trees of the FS | |
253 | * it currently lacks any block count etc etc | |
254 | */ | |
234b63a0 | 255 | struct btrfs_super_block { |
f254e52c | 256 | u8 csum[BTRFS_CSUM_SIZE]; |
63b10fc4 | 257 | /* the first 4 fields must match struct btrfs_header */ |
3768f368 | 258 | u8 fsid[16]; /* FS specific uuid */ |
db94535d | 259 | __le64 bytenr; /* this block number */ |
63b10fc4 | 260 | __le64 flags; |
e17cade2 CM |
261 | |
262 | /* allowed to be different from the btrfs_header from here own down */ | |
3768f368 | 263 | __le64 magic; |
3768f368 CM |
264 | __le64 generation; |
265 | __le64 root; | |
0b86a832 | 266 | __le64 chunk_root; |
db94535d CM |
267 | __le64 total_bytes; |
268 | __le64 bytes_used; | |
2e635a27 | 269 | __le64 root_dir_objectid; |
8a4b83cc | 270 | __le64 num_devices; |
5f39d397 CM |
271 | __le32 sectorsize; |
272 | __le32 nodesize; | |
273 | __le32 leafsize; | |
87ee04eb | 274 | __le32 stripesize; |
0b86a832 | 275 | __le32 sys_chunk_array_size; |
db94535d | 276 | u8 root_level; |
0b86a832 | 277 | u8 chunk_root_level; |
0d81ba5d | 278 | struct btrfs_dev_item dev_item; |
0b86a832 | 279 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
cfaa7295 CM |
280 | } __attribute__ ((__packed__)); |
281 | ||
fec577fb | 282 | /* |
62e2749e | 283 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
284 | * the item in the leaf (relative to the start of the data area) |
285 | */ | |
0783fcfc | 286 | struct btrfs_item { |
e2fa7227 | 287 | struct btrfs_disk_key key; |
123abc88 | 288 | __le32 offset; |
5f39d397 | 289 | __le32 size; |
eb60ceac CM |
290 | } __attribute__ ((__packed__)); |
291 | ||
fec577fb CM |
292 | /* |
293 | * leaves have an item area and a data area: | |
294 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
295 | * | |
296 | * The data is separate from the items to get the keys closer together | |
297 | * during searches. | |
298 | */ | |
234b63a0 | 299 | struct btrfs_leaf { |
bb492bb0 | 300 | struct btrfs_header header; |
123abc88 | 301 | struct btrfs_item items[]; |
eb60ceac CM |
302 | } __attribute__ ((__packed__)); |
303 | ||
fec577fb CM |
304 | /* |
305 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
306 | * other blocks | |
307 | */ | |
123abc88 CM |
308 | struct btrfs_key_ptr { |
309 | struct btrfs_disk_key key; | |
310 | __le64 blockptr; | |
74493f7a | 311 | __le64 generation; |
123abc88 CM |
312 | } __attribute__ ((__packed__)); |
313 | ||
234b63a0 | 314 | struct btrfs_node { |
bb492bb0 | 315 | struct btrfs_header header; |
123abc88 | 316 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
317 | } __attribute__ ((__packed__)); |
318 | ||
fec577fb | 319 | /* |
234b63a0 CM |
320 | * btrfs_paths remember the path taken from the root down to the leaf. |
321 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
322 | * to any other levels that are present. |
323 | * | |
324 | * The slots array records the index of the item or block pointer | |
325 | * used while walking the tree. | |
326 | */ | |
234b63a0 | 327 | struct btrfs_path { |
5f39d397 | 328 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
234b63a0 | 329 | int slots[BTRFS_MAX_LEVEL]; |
3c69faec | 330 | int reada; |
6702ed49 | 331 | int lowest_level; |
eb60ceac | 332 | }; |
5de08d7d | 333 | |
62e2749e CM |
334 | /* |
335 | * items in the extent btree are used to record the objectid of the | |
336 | * owner of the block and the number of references | |
337 | */ | |
338 | struct btrfs_extent_item { | |
339 | __le32 refs; | |
74493f7a CM |
340 | } __attribute__ ((__packed__)); |
341 | ||
342 | struct btrfs_extent_ref { | |
343 | __le64 root; | |
344 | __le64 generation; | |
345 | __le64 objectid; | |
346 | __le64 offset; | |
62e2749e CM |
347 | } __attribute__ ((__packed__)); |
348 | ||
0b86a832 CM |
349 | /* dev extents record free space on individual devices. The owner |
350 | * field points back to the chunk allocation mapping tree that allocated | |
e17cade2 | 351 | * the extent. The chunk tree uuid field is a way to double check the owner |
0b86a832 CM |
352 | */ |
353 | struct btrfs_dev_extent { | |
e17cade2 CM |
354 | __le64 chunk_tree; |
355 | __le64 chunk_objectid; | |
356 | __le64 chunk_offset; | |
0b86a832 | 357 | __le64 length; |
e17cade2 | 358 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
359 | } __attribute__ ((__packed__)); |
360 | ||
3954401f CM |
361 | struct btrfs_inode_ref { |
362 | __le16 name_len; | |
363 | /* name goes here */ | |
364 | } __attribute__ ((__packed__)); | |
365 | ||
0b86a832 | 366 | struct btrfs_timespec { |
f254e52c | 367 | __le64 sec; |
1e1d2701 CM |
368 | __le32 nsec; |
369 | } __attribute__ ((__packed__)); | |
370 | ||
371 | /* | |
372 | * there is no padding here on purpose. If you want to extent the inode, | |
373 | * make a new item type | |
374 | */ | |
375 | struct btrfs_inode_item { | |
376 | __le64 generation; | |
377 | __le64 size; | |
378 | __le64 nblocks; | |
31f3c99b | 379 | __le64 block_group; |
1e1d2701 CM |
380 | __le32 nlink; |
381 | __le32 uid; | |
382 | __le32 gid; | |
383 | __le32 mode; | |
0b86a832 | 384 | __le64 rdev; |
1e1d2701 CM |
385 | __le16 flags; |
386 | __le16 compat_flags; | |
0b86a832 CM |
387 | struct btrfs_timespec atime; |
388 | struct btrfs_timespec ctime; | |
389 | struct btrfs_timespec mtime; | |
390 | struct btrfs_timespec otime; | |
1e1d2701 CM |
391 | } __attribute__ ((__packed__)); |
392 | ||
62e2749e | 393 | struct btrfs_dir_item { |
d6e4a428 | 394 | struct btrfs_disk_key location; |
5103e947 | 395 | __le16 data_len; |
a8a2ee0c | 396 | __le16 name_len; |
62e2749e CM |
397 | u8 type; |
398 | } __attribute__ ((__packed__)); | |
399 | ||
400 | struct btrfs_root_item { | |
d6e4a428 CM |
401 | struct btrfs_inode_item inode; |
402 | __le64 root_dirid; | |
db94535d CM |
403 | __le64 bytenr; |
404 | __le64 byte_limit; | |
405 | __le64 bytes_used; | |
5eda7b5e | 406 | __le32 flags; |
62e2749e | 407 | __le32 refs; |
5eda7b5e CM |
408 | struct btrfs_disk_key drop_progress; |
409 | u8 drop_level; | |
db94535d | 410 | u8 level; |
9f5fae2f | 411 | } __attribute__ ((__packed__)); |
62e2749e | 412 | |
236454df CM |
413 | #define BTRFS_FILE_EXTENT_REG 0 |
414 | #define BTRFS_FILE_EXTENT_INLINE 1 | |
415 | ||
9f5fae2f | 416 | struct btrfs_file_extent_item { |
71951f35 | 417 | __le64 generation; |
236454df | 418 | u8 type; |
9f5fae2f CM |
419 | /* |
420 | * disk space consumed by the extent, checksum blocks are included | |
421 | * in these numbers | |
422 | */ | |
db94535d CM |
423 | __le64 disk_bytenr; |
424 | __le64 disk_num_bytes; | |
9f5fae2f | 425 | /* |
dee26a9f | 426 | * the logical offset in file blocks (no csums) |
9f5fae2f CM |
427 | * this extent record is for. This allows a file extent to point |
428 | * into the middle of an existing extent on disk, sharing it | |
429 | * between two snapshots (useful if some bytes in the middle of the | |
430 | * extent have changed | |
431 | */ | |
432 | __le64 offset; | |
433 | /* | |
434 | * the logical number of file blocks (no csums included) | |
435 | */ | |
db94535d | 436 | __le64 num_bytes; |
9f5fae2f CM |
437 | } __attribute__ ((__packed__)); |
438 | ||
f254e52c | 439 | struct btrfs_csum_item { |
509659cd | 440 | u8 csum; |
f254e52c CM |
441 | } __attribute__ ((__packed__)); |
442 | ||
0b86a832 CM |
443 | /* different types of block groups (and chunks) */ |
444 | #define BTRFS_BLOCK_GROUP_DATA (1 << 0) | |
445 | #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1) | |
446 | #define BTRFS_BLOCK_GROUP_METADATA (1 << 2) | |
593060d7 | 447 | #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3) |
8790d502 | 448 | #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4) |
611f0e00 | 449 | #define BTRFS_BLOCK_GROUP_DUP (1 << 5) |
321aecc6 | 450 | #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6) |
1e2677e0 | 451 | |
f84a8b36 | 452 | |
9078a3e1 CM |
453 | struct btrfs_block_group_item { |
454 | __le64 used; | |
0b86a832 CM |
455 | __le64 chunk_objectid; |
456 | __le64 flags; | |
9078a3e1 CM |
457 | } __attribute__ ((__packed__)); |
458 | ||
6324fbf3 CM |
459 | struct btrfs_space_info { |
460 | u64 flags; | |
461 | u64 total_bytes; | |
462 | u64 bytes_used; | |
463 | u64 bytes_pinned; | |
464 | int full; | |
465 | struct list_head list; | |
466 | }; | |
467 | ||
9078a3e1 CM |
468 | struct btrfs_block_group_cache { |
469 | struct btrfs_key key; | |
470 | struct btrfs_block_group_item item; | |
6324fbf3 | 471 | struct btrfs_space_info *space_info; |
324ae4df | 472 | u64 pinned; |
0b86a832 CM |
473 | u64 flags; |
474 | int cached; | |
9078a3e1 | 475 | }; |
0b86a832 CM |
476 | |
477 | struct btrfs_device; | |
8a4b83cc | 478 | struct btrfs_fs_devices; |
9f5fae2f | 479 | struct btrfs_fs_info { |
5f39d397 | 480 | u8 fsid[BTRFS_FSID_SIZE]; |
e17cade2 | 481 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
62e2749e CM |
482 | struct btrfs_root *extent_root; |
483 | struct btrfs_root *tree_root; | |
0b86a832 CM |
484 | struct btrfs_root *chunk_root; |
485 | struct btrfs_root *dev_root; | |
0f7d52f4 | 486 | struct radix_tree_root fs_roots_radix; |
1a5bc167 | 487 | |
d1310b2e CM |
488 | struct extent_io_tree free_space_cache; |
489 | struct extent_io_tree block_group_cache; | |
490 | struct extent_io_tree pinned_extents; | |
491 | struct extent_io_tree pending_del; | |
492 | struct extent_io_tree extent_ins; | |
1a5bc167 | 493 | |
0b86a832 CM |
494 | /* logical->physical extent mapping */ |
495 | struct btrfs_mapping_tree mapping_tree; | |
496 | ||
293ffd5f | 497 | u64 generation; |
15ee9bc7 | 498 | u64 last_trans_committed; |
b6cda9bc | 499 | unsigned long mount_opt; |
c59f8951 | 500 | u64 max_extent; |
6f568d35 | 501 | u64 max_inline; |
8f662a76 | 502 | u64 alloc_start; |
79154b1b | 503 | struct btrfs_transaction *running_transaction; |
4b52dff6 | 504 | struct btrfs_super_block super_copy; |
5f39d397 | 505 | struct extent_buffer *sb_buffer; |
0b86a832 | 506 | struct block_device *__bdev; |
e20d96d6 | 507 | struct super_block *sb; |
d98237b3 | 508 | struct inode *btree_inode; |
04160088 | 509 | struct backing_dev_info bdi; |
19c00ddc | 510 | spinlock_t hash_lock; |
79154b1b | 511 | struct mutex trans_mutex; |
d561c025 | 512 | struct mutex fs_mutex; |
8fd17795 | 513 | struct list_head trans_list; |
19c00ddc | 514 | struct list_head hashers; |
facda1e7 | 515 | struct list_head dead_roots; |
ce9adaa5 CM |
516 | struct list_head end_io_work_list; |
517 | struct work_struct end_io_work; | |
518 | spinlock_t end_io_work_lock; | |
519 | ||
6da6abae CM |
520 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) |
521 | struct work_struct trans_work; | |
522 | #else | |
08607c1b | 523 | struct delayed_work trans_work; |
6da6abae | 524 | #endif |
58176a96 JB |
525 | struct kobject super_kobj; |
526 | struct completion kobj_unregister; | |
e66f709b | 527 | int do_barriers; |
facda1e7 | 528 | int closing; |
e2008b61 | 529 | unsigned long throttles; |
9f5fae2f | 530 | |
324ae4df | 531 | u64 total_pinned; |
0b86a832 CM |
532 | struct list_head dirty_cowonly_roots; |
533 | ||
8a4b83cc | 534 | struct btrfs_fs_devices *fs_devices; |
6324fbf3 | 535 | struct list_head space_info; |
1832a6d5 | 536 | spinlock_t delalloc_lock; |
cee36a03 | 537 | spinlock_t new_trans_lock; |
1832a6d5 | 538 | u64 delalloc_bytes; |
e18e4809 | 539 | u64 last_alloc; |
4529ba49 | 540 | u64 last_data_alloc; |
d18a2c44 CM |
541 | |
542 | u64 avail_data_alloc_bits; | |
543 | u64 avail_metadata_alloc_bits; | |
544 | u64 avail_system_alloc_bits; | |
545 | u64 data_alloc_profile; | |
546 | u64 metadata_alloc_profile; | |
547 | u64 system_alloc_profile; | |
324ae4df | 548 | }; |
0b86a832 | 549 | |
9f5fae2f CM |
550 | /* |
551 | * in ram representation of the tree. extent_root is used for all allocations | |
f2458e1d | 552 | * and for the extent tree extent_root root. |
9f5fae2f CM |
553 | */ |
554 | struct btrfs_root { | |
5f39d397 CM |
555 | struct extent_buffer *node; |
556 | struct extent_buffer *commit_root; | |
62e2749e CM |
557 | struct btrfs_root_item root_item; |
558 | struct btrfs_key root_key; | |
9f5fae2f | 559 | struct btrfs_fs_info *fs_info; |
0f7d52f4 | 560 | struct inode *inode; |
58176a96 JB |
561 | struct kobject root_kobj; |
562 | struct completion kobj_unregister; | |
0f7d52f4 CM |
563 | u64 objectid; |
564 | u64 last_trans; | |
5f39d397 CM |
565 | |
566 | /* data allocations are done in sectorsize units */ | |
567 | u32 sectorsize; | |
568 | ||
569 | /* node allocations are done in nodesize units */ | |
570 | u32 nodesize; | |
571 | ||
572 | /* leaf allocations are done in leafsize units */ | |
573 | u32 leafsize; | |
574 | ||
87ee04eb CM |
575 | u32 stripesize; |
576 | ||
9f5fae2f | 577 | u32 type; |
1b05da2e CM |
578 | u64 highest_inode; |
579 | u64 last_inode_alloc; | |
9f3a7427 | 580 | int ref_cows; |
0b86a832 | 581 | int track_dirty; |
6702ed49 CM |
582 | struct btrfs_key defrag_progress; |
583 | int defrag_running; | |
584 | int defrag_level; | |
58176a96 | 585 | char *name; |
4313b399 | 586 | int in_sysfs; |
0b86a832 CM |
587 | |
588 | /* the dirty list is only used by non-reference counted roots */ | |
589 | struct list_head dirty_list; | |
62e2749e CM |
590 | }; |
591 | ||
1e1d2701 | 592 | /* |
0b86a832 | 593 | |
1e1d2701 CM |
594 | * inode items have the data typically returned from stat and store other |
595 | * info about object characteristics. There is one for every file and dir in | |
596 | * the FS | |
597 | */ | |
9078a3e1 | 598 | #define BTRFS_INODE_ITEM_KEY 1 |
3954401f CM |
599 | #define BTRFS_INODE_REF_KEY 2 |
600 | #define BTRFS_XATTR_ITEM_KEY 8 | |
9078a3e1 | 601 | /* reserve 2-15 close to the inode for later flexibility */ |
1e1d2701 CM |
602 | |
603 | /* | |
604 | * dir items are the name -> inode pointers in a directory. There is one | |
605 | * for every name in a directory. | |
606 | */ | |
9078a3e1 CM |
607 | #define BTRFS_DIR_ITEM_KEY 16 |
608 | #define BTRFS_DIR_INDEX_KEY 17 | |
1e1d2701 | 609 | /* |
9078a3e1 | 610 | * extent data is for file data |
1e1d2701 | 611 | */ |
9078a3e1 | 612 | #define BTRFS_EXTENT_DATA_KEY 18 |
f254e52c CM |
613 | /* |
614 | * csum items have the checksums for data in the extents | |
615 | */ | |
9078a3e1 CM |
616 | #define BTRFS_CSUM_ITEM_KEY 19 |
617 | ||
618 | /* reserve 20-31 for other file stuff */ | |
f254e52c | 619 | |
1e1d2701 CM |
620 | /* |
621 | * root items point to tree roots. There are typically in the root | |
622 | * tree used by the super block to find all the other trees | |
623 | */ | |
9078a3e1 | 624 | #define BTRFS_ROOT_ITEM_KEY 32 |
1e1d2701 CM |
625 | /* |
626 | * extent items are in the extent map tree. These record which blocks | |
627 | * are used, and how many references there are to each block | |
628 | */ | |
9078a3e1 | 629 | #define BTRFS_EXTENT_ITEM_KEY 33 |
74493f7a | 630 | #define BTRFS_EXTENT_REF_KEY 34 |
9078a3e1 CM |
631 | |
632 | /* | |
633 | * block groups give us hints into the extent allocation trees. Which | |
634 | * blocks are free etc etc | |
635 | */ | |
74493f7a | 636 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 50 |
9f5fae2f | 637 | |
0b86a832 CM |
638 | #define BTRFS_DEV_EXTENT_KEY 75 |
639 | #define BTRFS_DEV_ITEM_KEY 76 | |
640 | #define BTRFS_CHUNK_ITEM_KEY 77 | |
641 | ||
1e1d2701 CM |
642 | /* |
643 | * string items are for debugging. They just store a short string of | |
644 | * data in the FS | |
645 | */ | |
9078a3e1 CM |
646 | #define BTRFS_STRING_ITEM_KEY 253 |
647 | ||
21ad10cf CM |
648 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
649 | #define BTRFS_MOUNT_NODATACOW (1 << 1) | |
650 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) | |
e18e4809 | 651 | #define BTRFS_MOUNT_SSD (1 << 3) |
b6cda9bc CM |
652 | |
653 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) | |
654 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) | |
655 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ | |
656 | BTRFS_MOUNT_##opt) | |
b98b6767 Y |
657 | /* |
658 | * Inode flags | |
659 | */ | |
fdebe2bd Y |
660 | #define BTRFS_INODE_NODATASUM (1 << 0) |
661 | #define BTRFS_INODE_NODATACOW (1 << 1) | |
662 | #define BTRFS_INODE_READONLY (1 << 2) | |
b98b6767 Y |
663 | #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \ |
664 | ~BTRFS_INODE_##flag) | |
665 | #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \ | |
666 | BTRFS_INODE_##flag) | |
667 | #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \ | |
668 | BTRFS_INODE_##flag) | |
5f39d397 CM |
669 | /* some macros to generate set/get funcs for the struct fields. This |
670 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | |
671 | * one for u8: | |
672 | */ | |
673 | #define le8_to_cpu(v) (v) | |
674 | #define cpu_to_le8(v) (v) | |
675 | #define __le8 u8 | |
676 | ||
677 | #define read_eb_member(eb, ptr, type, member, result) ( \ | |
678 | read_extent_buffer(eb, (char *)(result), \ | |
679 | ((unsigned long)(ptr)) + \ | |
680 | offsetof(type, member), \ | |
681 | sizeof(((type *)0)->member))) | |
682 | ||
683 | #define write_eb_member(eb, ptr, type, member, result) ( \ | |
684 | write_extent_buffer(eb, (char *)(result), \ | |
685 | ((unsigned long)(ptr)) + \ | |
686 | offsetof(type, member), \ | |
687 | sizeof(((type *)0)->member))) | |
688 | ||
0f82731f | 689 | #ifndef BTRFS_SETGET_FUNCS |
5f39d397 | 690 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
0f82731f CM |
691 | u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ |
692 | void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); | |
693 | #endif | |
5f39d397 CM |
694 | |
695 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | |
696 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | |
697 | { \ | |
df68b8a7 DM |
698 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
699 | u##bits res = le##bits##_to_cpu(p->member); \ | |
700 | kunmap_atomic(p, KM_USER0); \ | |
810191ff | 701 | return res; \ |
5f39d397 CM |
702 | } \ |
703 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
704 | u##bits val) \ | |
705 | { \ | |
df68b8a7 DM |
706 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
707 | p->member = cpu_to_le##bits(val); \ | |
708 | kunmap_atomic(p, KM_USER0); \ | |
5f39d397 | 709 | } |
9078a3e1 | 710 | |
5f39d397 CM |
711 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
712 | static inline u##bits btrfs_##name(type *s) \ | |
713 | { \ | |
714 | return le##bits##_to_cpu(s->member); \ | |
715 | } \ | |
716 | static inline void btrfs_set_##name(type *s, u##bits val) \ | |
717 | { \ | |
718 | s->member = cpu_to_le##bits(val); \ | |
1e1d2701 CM |
719 | } |
720 | ||
0b86a832 CM |
721 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
722 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); | |
723 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); | |
724 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); | |
725 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); | |
726 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); | |
727 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
728 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); |
729 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); | |
730 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); | |
0b86a832 | 731 | |
8a4b83cc CM |
732 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
733 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, | |
734 | total_bytes, 64); | |
735 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, | |
736 | bytes_used, 64); | |
737 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, | |
738 | io_align, 32); | |
739 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, | |
740 | io_width, 32); | |
741 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, | |
742 | sector_size, 32); | |
743 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
744 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, |
745 | dev_group, 32); | |
746 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, | |
747 | seek_speed, 8); | |
748 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, | |
749 | bandwidth, 8); | |
8a4b83cc | 750 | |
0b86a832 CM |
751 | static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) |
752 | { | |
753 | return (char *)d + offsetof(struct btrfs_dev_item, uuid); | |
754 | } | |
755 | ||
e17cade2 | 756 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
0b86a832 CM |
757 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
758 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); | |
759 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); | |
760 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); | |
761 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); | |
762 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); | |
763 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); | |
321aecc6 | 764 | BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); |
0b86a832 CM |
765 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
766 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); | |
767 | ||
e17cade2 CM |
768 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
769 | { | |
770 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); | |
771 | } | |
772 | ||
773 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); | |
0b86a832 CM |
774 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
775 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, | |
776 | stripe_len, 64); | |
777 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, | |
778 | io_align, 32); | |
779 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, | |
780 | io_width, 32); | |
781 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, | |
782 | sector_size, 32); | |
783 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); | |
784 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, | |
785 | num_stripes, 16); | |
321aecc6 CM |
786 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, |
787 | sub_stripes, 16); | |
0b86a832 CM |
788 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
789 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); | |
790 | ||
791 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, | |
792 | int nr) | |
793 | { | |
794 | unsigned long offset = (unsigned long)c; | |
795 | offset += offsetof(struct btrfs_chunk, stripe); | |
796 | offset += nr * sizeof(struct btrfs_stripe); | |
797 | return (struct btrfs_stripe *)offset; | |
798 | } | |
799 | ||
800 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, | |
801 | struct btrfs_chunk *c, int nr) | |
802 | { | |
803 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); | |
804 | } | |
805 | ||
806 | static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, | |
807 | struct btrfs_chunk *c, int nr, | |
808 | u64 val) | |
809 | { | |
810 | btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); | |
811 | } | |
812 | ||
813 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, | |
814 | struct btrfs_chunk *c, int nr) | |
815 | { | |
816 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); | |
817 | } | |
818 | ||
819 | static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, | |
820 | struct btrfs_chunk *c, int nr, | |
821 | u64 val) | |
822 | { | |
823 | btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); | |
824 | } | |
825 | ||
5f39d397 CM |
826 | /* struct btrfs_block_group_item */ |
827 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | |
828 | used, 64); | |
829 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | |
830 | used, 64); | |
0b86a832 CM |
831 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
832 | struct btrfs_block_group_item, chunk_objectid, 64); | |
e17cade2 CM |
833 | |
834 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, | |
0b86a832 CM |
835 | struct btrfs_block_group_item, chunk_objectid, 64); |
836 | BTRFS_SETGET_FUNCS(disk_block_group_flags, | |
837 | struct btrfs_block_group_item, flags, 64); | |
838 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, | |
839 | struct btrfs_block_group_item, flags, 64); | |
1e1d2701 | 840 | |
3954401f CM |
841 | /* struct btrfs_inode_ref */ |
842 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); | |
843 | ||
5f39d397 CM |
844 | /* struct btrfs_inode_item */ |
845 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | |
846 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); | |
847 | BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64); | |
848 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); | |
849 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | |
850 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | |
851 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | |
852 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | |
0b86a832 | 853 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
5f39d397 CM |
854 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16); |
855 | BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item, | |
856 | compat_flags, 16); | |
1e1d2701 | 857 | |
0b86a832 | 858 | static inline struct btrfs_timespec * |
5f39d397 | 859 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 860 | { |
5f39d397 CM |
861 | unsigned long ptr = (unsigned long)inode_item; |
862 | ptr += offsetof(struct btrfs_inode_item, atime); | |
0b86a832 | 863 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
864 | } |
865 | ||
0b86a832 | 866 | static inline struct btrfs_timespec * |
5f39d397 | 867 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 868 | { |
5f39d397 CM |
869 | unsigned long ptr = (unsigned long)inode_item; |
870 | ptr += offsetof(struct btrfs_inode_item, mtime); | |
0b86a832 | 871 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
872 | } |
873 | ||
0b86a832 | 874 | static inline struct btrfs_timespec * |
5f39d397 | 875 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 876 | { |
5f39d397 CM |
877 | unsigned long ptr = (unsigned long)inode_item; |
878 | ptr += offsetof(struct btrfs_inode_item, ctime); | |
0b86a832 | 879 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
880 | } |
881 | ||
0b86a832 | 882 | static inline struct btrfs_timespec * |
5f39d397 | 883 | btrfs_inode_otime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 884 | { |
5f39d397 CM |
885 | unsigned long ptr = (unsigned long)inode_item; |
886 | ptr += offsetof(struct btrfs_inode_item, otime); | |
0b86a832 | 887 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
888 | } |
889 | ||
0b86a832 CM |
890 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
891 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); | |
e20d96d6 | 892 | |
5f39d397 CM |
893 | /* struct btrfs_extent_item */ |
894 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32); | |
74493f7a | 895 | |
0b86a832 | 896 | /* struct btrfs_dev_extent */ |
e17cade2 CM |
897 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
898 | chunk_tree, 64); | |
899 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, | |
900 | chunk_objectid, 64); | |
901 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, | |
902 | chunk_offset, 64); | |
0b86a832 CM |
903 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
904 | ||
e17cade2 CM |
905 | static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
906 | { | |
907 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); | |
908 | return (u8 *)((unsigned long)dev + ptr); | |
909 | } | |
910 | ||
74493f7a CM |
911 | /* struct btrfs_extent_ref */ |
912 | BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64); | |
913 | BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64); | |
914 | BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64); | |
915 | BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64); | |
916 | ||
7bb86316 CM |
917 | BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64); |
918 | BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref, | |
74493f7a | 919 | generation, 64); |
7bb86316 CM |
920 | BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref, |
921 | objectid, 64); | |
922 | BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64); | |
e20d96d6 | 923 | |
5f39d397 CM |
924 | BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, |
925 | refs, 32); | |
e20d96d6 | 926 | |
5f39d397 CM |
927 | /* struct btrfs_node */ |
928 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | |
74493f7a | 929 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
e20d96d6 | 930 | |
5f39d397 | 931 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
cf27e1ee | 932 | { |
5f39d397 CM |
933 | unsigned long ptr; |
934 | ptr = offsetof(struct btrfs_node, ptrs) + | |
935 | sizeof(struct btrfs_key_ptr) * nr; | |
936 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | |
cf27e1ee CM |
937 | } |
938 | ||
5f39d397 CM |
939 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
940 | int nr, u64 val) | |
cf27e1ee | 941 | { |
5f39d397 CM |
942 | unsigned long ptr; |
943 | ptr = offsetof(struct btrfs_node, ptrs) + | |
944 | sizeof(struct btrfs_key_ptr) * nr; | |
945 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | |
cf27e1ee CM |
946 | } |
947 | ||
74493f7a CM |
948 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
949 | { | |
950 | unsigned long ptr; | |
951 | ptr = offsetof(struct btrfs_node, ptrs) + | |
952 | sizeof(struct btrfs_key_ptr) * nr; | |
953 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); | |
954 | } | |
955 | ||
956 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, | |
957 | int nr, u64 val) | |
958 | { | |
959 | unsigned long ptr; | |
960 | ptr = offsetof(struct btrfs_node, ptrs) + | |
961 | sizeof(struct btrfs_key_ptr) * nr; | |
962 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); | |
963 | } | |
964 | ||
810191ff | 965 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
4d775673 | 966 | { |
5f39d397 CM |
967 | return offsetof(struct btrfs_node, ptrs) + |
968 | sizeof(struct btrfs_key_ptr) * nr; | |
4d775673 CM |
969 | } |
970 | ||
e644d021 CM |
971 | void btrfs_node_key(struct extent_buffer *eb, |
972 | struct btrfs_disk_key *disk_key, int nr); | |
973 | ||
5f39d397 CM |
974 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
975 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f8a0c | 976 | { |
5f39d397 CM |
977 | unsigned long ptr; |
978 | ptr = btrfs_node_key_ptr_offset(nr); | |
979 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
980 | struct btrfs_key_ptr, key, disk_key); | |
1d4f8a0c CM |
981 | } |
982 | ||
5f39d397 CM |
983 | /* struct btrfs_item */ |
984 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | |
985 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | |
4d775673 | 986 | |
5f39d397 | 987 | static inline unsigned long btrfs_item_nr_offset(int nr) |
1d4f8a0c | 988 | { |
5f39d397 CM |
989 | return offsetof(struct btrfs_leaf, items) + |
990 | sizeof(struct btrfs_item) * nr; | |
1d4f8a0c CM |
991 | } |
992 | ||
5f39d397 CM |
993 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
994 | int nr) | |
0783fcfc | 995 | { |
5f39d397 | 996 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
0783fcfc CM |
997 | } |
998 | ||
5f39d397 CM |
999 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
1000 | struct btrfs_item *item) | |
0783fcfc | 1001 | { |
5f39d397 | 1002 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
0783fcfc CM |
1003 | } |
1004 | ||
5f39d397 | 1005 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1006 | { |
5f39d397 | 1007 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1008 | } |
1009 | ||
5f39d397 | 1010 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1011 | { |
5f39d397 | 1012 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1013 | } |
1014 | ||
5f39d397 | 1015 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1016 | { |
5f39d397 | 1017 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1018 | } |
1019 | ||
5f39d397 CM |
1020 | static inline void btrfs_item_key(struct extent_buffer *eb, |
1021 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 1022 | { |
5f39d397 CM |
1023 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
1024 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
1025 | } |
1026 | ||
5f39d397 CM |
1027 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
1028 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 1029 | { |
5f39d397 CM |
1030 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
1031 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
1032 | } |
1033 | ||
5f39d397 | 1034 | /* struct btrfs_dir_item */ |
5103e947 | 1035 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
5f39d397 CM |
1036 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
1037 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | |
1d4f6404 | 1038 | |
5f39d397 CM |
1039 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
1040 | struct btrfs_dir_item *item, | |
1041 | struct btrfs_disk_key *key) | |
1d4f6404 | 1042 | { |
5f39d397 | 1043 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
1d4f6404 CM |
1044 | } |
1045 | ||
5f39d397 CM |
1046 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
1047 | struct btrfs_dir_item *item, | |
1048 | struct btrfs_disk_key *key) | |
a8a2ee0c | 1049 | { |
5f39d397 | 1050 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
a8a2ee0c CM |
1051 | } |
1052 | ||
5f39d397 CM |
1053 | /* struct btrfs_disk_key */ |
1054 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | |
1055 | objectid, 64); | |
1056 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | |
1057 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | |
1d4f6404 | 1058 | |
e2fa7227 CM |
1059 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
1060 | struct btrfs_disk_key *disk) | |
1061 | { | |
1062 | cpu->offset = le64_to_cpu(disk->offset); | |
5f39d397 | 1063 | cpu->type = disk->type; |
e2fa7227 CM |
1064 | cpu->objectid = le64_to_cpu(disk->objectid); |
1065 | } | |
1066 | ||
1067 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
1068 | struct btrfs_key *cpu) | |
1069 | { | |
1070 | disk->offset = cpu_to_le64(cpu->offset); | |
5f39d397 | 1071 | disk->type = cpu->type; |
e2fa7227 CM |
1072 | disk->objectid = cpu_to_le64(cpu->objectid); |
1073 | } | |
1074 | ||
5f39d397 CM |
1075 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
1076 | struct btrfs_key *key, int nr) | |
7f5c1516 | 1077 | { |
5f39d397 CM |
1078 | struct btrfs_disk_key disk_key; |
1079 | btrfs_node_key(eb, &disk_key, nr); | |
1080 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
1081 | } |
1082 | ||
5f39d397 CM |
1083 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
1084 | struct btrfs_key *key, int nr) | |
7f5c1516 | 1085 | { |
5f39d397 CM |
1086 | struct btrfs_disk_key disk_key; |
1087 | btrfs_item_key(eb, &disk_key, nr); | |
1088 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
1089 | } |
1090 | ||
5f39d397 CM |
1091 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
1092 | struct btrfs_dir_item *item, | |
1093 | struct btrfs_key *key) | |
4d775673 | 1094 | { |
5f39d397 CM |
1095 | struct btrfs_disk_key disk_key; |
1096 | btrfs_dir_item_key(eb, item, &disk_key); | |
1097 | btrfs_disk_key_to_cpu(key, &disk_key); | |
4d775673 CM |
1098 | } |
1099 | ||
58176a96 | 1100 | |
5f39d397 | 1101 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
3768f368 | 1102 | { |
5f39d397 | 1103 | return key->type; |
3768f368 CM |
1104 | } |
1105 | ||
5f39d397 | 1106 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
3768f368 | 1107 | { |
5f39d397 | 1108 | key->type = val; |
3768f368 CM |
1109 | } |
1110 | ||
5f39d397 | 1111 | /* struct btrfs_header */ |
db94535d | 1112 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
5f39d397 CM |
1113 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
1114 | generation, 64); | |
1115 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | |
1116 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | |
63b10fc4 | 1117 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
5f39d397 | 1118 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
0f7d52f4 | 1119 | |
63b10fc4 CM |
1120 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) |
1121 | { | |
1122 | return (btrfs_header_flags(eb) & flag) == flag; | |
1123 | } | |
1124 | ||
1125 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) | |
1126 | { | |
1127 | u64 flags = btrfs_header_flags(eb); | |
1128 | btrfs_set_header_flags(eb, flags | flag); | |
1129 | return (flags & flag) == flag; | |
1130 | } | |
1131 | ||
1132 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) | |
1133 | { | |
1134 | u64 flags = btrfs_header_flags(eb); | |
1135 | btrfs_set_header_flags(eb, flags & ~flag); | |
1136 | return (flags & flag) == flag; | |
1137 | } | |
1138 | ||
5f39d397 | 1139 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
0f7d52f4 | 1140 | { |
5f39d397 CM |
1141 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
1142 | return (u8 *)ptr; | |
0f7d52f4 CM |
1143 | } |
1144 | ||
e17cade2 CM |
1145 | static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) |
1146 | { | |
1147 | unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid); | |
1148 | return (u8 *)ptr; | |
1149 | } | |
1150 | ||
5f39d397 | 1151 | static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) |
3768f368 | 1152 | { |
5f39d397 CM |
1153 | unsigned long ptr = offsetof(struct btrfs_super_block, fsid); |
1154 | return (u8 *)ptr; | |
3768f368 CM |
1155 | } |
1156 | ||
5f39d397 | 1157 | static inline u8 *btrfs_header_csum(struct extent_buffer *eb) |
3768f368 | 1158 | { |
5f39d397 CM |
1159 | unsigned long ptr = offsetof(struct btrfs_header, csum); |
1160 | return (u8 *)ptr; | |
3768f368 CM |
1161 | } |
1162 | ||
5f39d397 | 1163 | static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) |
3768f368 | 1164 | { |
5f39d397 | 1165 | return NULL; |
3768f368 CM |
1166 | } |
1167 | ||
5f39d397 | 1168 | static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) |
3768f368 | 1169 | { |
5f39d397 | 1170 | return NULL; |
3768f368 CM |
1171 | } |
1172 | ||
5f39d397 | 1173 | static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) |
3768f368 | 1174 | { |
5f39d397 | 1175 | return NULL; |
3768f368 CM |
1176 | } |
1177 | ||
5f39d397 | 1178 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
3768f368 | 1179 | { |
5f39d397 | 1180 | return (btrfs_header_level(eb) == 0); |
3768f368 CM |
1181 | } |
1182 | ||
5f39d397 CM |
1183 | /* struct btrfs_root_item */ |
1184 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); | |
db94535d CM |
1185 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
1186 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); | |
3768f368 | 1187 | |
db94535d CM |
1188 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
1189 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); | |
5f39d397 CM |
1190 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
1191 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | |
1192 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32); | |
db94535d CM |
1193 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
1194 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); | |
123abc88 | 1195 | |
5f39d397 | 1196 | /* struct btrfs_super_block */ |
db94535d | 1197 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
5f39d397 CM |
1198 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
1199 | generation, 64); | |
1200 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | |
0b86a832 CM |
1201 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
1202 | struct btrfs_super_block, sys_chunk_array_size, 32); | |
db94535d CM |
1203 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
1204 | root_level, 8); | |
0b86a832 CM |
1205 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
1206 | chunk_root, 64); | |
1207 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, | |
1208 | chunk_root_level, 64); | |
db94535d CM |
1209 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
1210 | total_bytes, 64); | |
1211 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, | |
1212 | bytes_used, 64); | |
5f39d397 CM |
1213 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
1214 | sectorsize, 32); | |
1215 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | |
1216 | nodesize, 32); | |
1217 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, | |
1218 | leafsize, 32); | |
87ee04eb CM |
1219 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
1220 | stripesize, 32); | |
5f39d397 CM |
1221 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
1222 | root_dir_objectid, 64); | |
8a4b83cc CM |
1223 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
1224 | num_devices, 64); | |
2e635a27 | 1225 | |
5f39d397 | 1226 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
2e635a27 | 1227 | { |
5f39d397 | 1228 | return offsetof(struct btrfs_leaf, items); |
2e635a27 CM |
1229 | } |
1230 | ||
5f39d397 CM |
1231 | /* struct btrfs_file_extent_item */ |
1232 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | |
9f5fae2f | 1233 | |
5f39d397 | 1234 | static inline unsigned long btrfs_file_extent_inline_start(struct |
236454df CM |
1235 | btrfs_file_extent_item *e) |
1236 | { | |
5f39d397 | 1237 | unsigned long offset = (unsigned long)e; |
db94535d | 1238 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 1239 | return offset; |
236454df CM |
1240 | } |
1241 | ||
1242 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
1243 | { | |
db94535d | 1244 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
9f5fae2f CM |
1245 | } |
1246 | ||
5f39d397 CM |
1247 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, |
1248 | struct btrfs_item *e) | |
9f5fae2f | 1249 | { |
5f39d397 | 1250 | unsigned long offset; |
db94535d | 1251 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 1252 | return btrfs_item_size(eb, e) - offset; |
9f5fae2f CM |
1253 | } |
1254 | ||
db94535d CM |
1255 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
1256 | disk_bytenr, 64); | |
5f39d397 CM |
1257 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
1258 | generation, 64); | |
db94535d CM |
1259 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
1260 | disk_num_bytes, 64); | |
5f39d397 CM |
1261 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
1262 | offset, 64); | |
db94535d CM |
1263 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
1264 | num_bytes, 64); | |
9f5fae2f | 1265 | |
e20d96d6 CM |
1266 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
1267 | { | |
1268 | return sb->s_fs_info; | |
1269 | } | |
1270 | ||
58176a96 JB |
1271 | static inline int btrfs_set_root_name(struct btrfs_root *root, |
1272 | const char *name, int len) | |
1273 | { | |
1274 | /* if we already have a name just free it */ | |
1275 | if (root->name) | |
1276 | kfree(root->name); | |
1277 | ||
1278 | root->name = kmalloc(len+1, GFP_KERNEL); | |
1279 | if (!root->name) | |
1280 | return -ENOMEM; | |
1281 | ||
1282 | memcpy(root->name, name, len); | |
1283 | root->name[len] ='\0'; | |
1284 | ||
1285 | return 0; | |
1286 | } | |
1287 | ||
db94535d CM |
1288 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) { |
1289 | if (level == 0) | |
1290 | return root->leafsize; | |
1291 | return root->nodesize; | |
1292 | } | |
1293 | ||
4beb1b8b CM |
1294 | /* helper function to cast into the data area of the leaf. */ |
1295 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 | 1296 | ((type *)(btrfs_leaf_data(leaf) + \ |
5f39d397 CM |
1297 | btrfs_item_offset_nr(leaf, slot))) |
1298 | ||
1299 | #define btrfs_item_ptr_offset(leaf, slot) \ | |
1300 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | |
1301 | btrfs_item_offset_nr(leaf, slot))) | |
4beb1b8b | 1302 | |
6da6abae CM |
1303 | static inline struct dentry *fdentry(struct file *file) { |
1304 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) | |
1305 | return file->f_dentry; | |
1306 | #else | |
1307 | return file->f_path.dentry; | |
1308 | #endif | |
1309 | } | |
1310 | ||
b18c6685 | 1311 | /* extent-tree.c */ |
be20aa9d CM |
1312 | u32 btrfs_count_snapshots_in_path(struct btrfs_root *root, |
1313 | struct btrfs_path *count_path, | |
1314 | u64 first_extent); | |
e9d0b13b CM |
1315 | int btrfs_extent_post_op(struct btrfs_trans_handle *trans, |
1316 | struct btrfs_root *root); | |
d1310b2e | 1317 | int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy); |
5276aeda CM |
1318 | struct btrfs_block_group_cache *btrfs_lookup_block_group(struct |
1319 | btrfs_fs_info *info, | |
db94535d | 1320 | u64 bytenr); |
31f3c99b CM |
1321 | struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root, |
1322 | struct btrfs_block_group_cache | |
be744175 | 1323 | *hint, u64 search_start, |
de428b63 | 1324 | int data, int owner); |
c5739bba | 1325 | int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, |
7bb86316 | 1326 | struct btrfs_root *root, u64 owner_objectid); |
5f39d397 | 1327 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
db94535d | 1328 | struct btrfs_root *root, u32 size, |
7bb86316 | 1329 | u64 root_objectid, |
db94535d | 1330 | u64 hint, u64 empty_size); |
7bb86316 CM |
1331 | struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
1332 | struct btrfs_root *root, | |
1333 | u32 blocksize, | |
1334 | u64 root_objectid, | |
1335 | u64 ref_generation, | |
1336 | u64 first_objectid, | |
1337 | int level, | |
1338 | u64 hint, | |
1339 | u64 empty_size); | |
edbd8d4e CM |
1340 | int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans, |
1341 | struct btrfs_root *root, u64 new_size); | |
1342 | int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size); | |
7bb86316 CM |
1343 | int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans, |
1344 | struct btrfs_root *root, | |
1345 | struct btrfs_path *path, u64 bytenr, | |
1346 | u64 root_objectid, u64 ref_generation, | |
1347 | u64 owner, u64 owner_offset); | |
4d775673 | 1348 | int btrfs_alloc_extent(struct btrfs_trans_handle *trans, |
7bb86316 | 1349 | struct btrfs_root *root, |
98d20f67 CM |
1350 | u64 num_bytes, u64 min_bytes, |
1351 | u64 root_objectid, u64 ref_generation, | |
7bb86316 CM |
1352 | u64 owner, u64 owner_offset, |
1353 | u64 empty_size, u64 hint_byte, | |
be08c1b9 | 1354 | u64 search_end, struct btrfs_key *ins, int data); |
e089f05c | 1355 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
5f39d397 | 1356 | struct extent_buffer *buf); |
e089f05c | 1357 | int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
7bb86316 CM |
1358 | *root, u64 bytenr, u64 num_bytes, |
1359 | u64 root_objectid, u64 ref_generation, | |
1360 | u64 owner_objectid, u64 owner_offset, int pin); | |
ccd467d6 CM |
1361 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
1362 | struct btrfs_root *root, | |
d1310b2e | 1363 | struct extent_io_tree *unpin); |
b18c6685 CM |
1364 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
1365 | struct btrfs_root *root, | |
7bb86316 CM |
1366 | u64 bytenr, u64 num_bytes, |
1367 | u64 root_objectid, u64 ref_generation, | |
1368 | u64 owner, u64 owner_offset); | |
9078a3e1 CM |
1369 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
1370 | struct btrfs_root *root); | |
1371 | int btrfs_free_block_groups(struct btrfs_fs_info *info); | |
1372 | int btrfs_read_block_groups(struct btrfs_root *root); | |
0b86a832 CM |
1373 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
1374 | struct btrfs_root *root, u64 bytes_used, | |
e17cade2 | 1375 | u64 type, u64 chunk_objectid, u64 chunk_offset, |
0b86a832 | 1376 | u64 size); |
dee26a9f | 1377 | /* ctree.c */ |
0b86a832 CM |
1378 | int btrfs_previous_item(struct btrfs_root *root, |
1379 | struct btrfs_path *path, u64 min_objectid, | |
1380 | int type); | |
5f39d397 CM |
1381 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
1382 | struct btrfs_root *root, struct extent_buffer *buf, | |
1383 | struct extent_buffer *parent, int parent_slot, | |
1384 | struct extent_buffer **cow_ret); | |
be20aa9d CM |
1385 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
1386 | struct btrfs_root *root, | |
1387 | struct extent_buffer *buf, | |
1388 | struct extent_buffer **cow_ret, u64 new_root_objectid); | |
6567e837 CM |
1389 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
1390 | *root, struct btrfs_path *path, u32 data_size); | |
b18c6685 CM |
1391 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
1392 | struct btrfs_root *root, | |
1393 | struct btrfs_path *path, | |
179e29e4 | 1394 | u32 new_size, int from_end); |
e089f05c CM |
1395 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
1396 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
1397 | ins_len, int cow); | |
6702ed49 | 1398 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
5f39d397 | 1399 | struct btrfs_root *root, struct extent_buffer *parent, |
a6b6e75e CM |
1400 | int start_slot, int cache_only, u64 *last_ret, |
1401 | struct btrfs_key *progress); | |
234b63a0 | 1402 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
2c90e5d6 CM |
1403 | struct btrfs_path *btrfs_alloc_path(void); |
1404 | void btrfs_free_path(struct btrfs_path *p); | |
234b63a0 | 1405 | void btrfs_init_path(struct btrfs_path *p); |
85e21bac CM |
1406 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
1407 | struct btrfs_path *path, int slot, int nr); | |
1408 | ||
1409 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, | |
1410 | struct btrfs_root *root, | |
1411 | struct btrfs_path *path) | |
1412 | { | |
1413 | return btrfs_del_items(trans, root, path, path->slots[0], 1); | |
1414 | } | |
1415 | ||
e089f05c CM |
1416 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
1417 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
9c58309d CM |
1418 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
1419 | struct btrfs_root *root, | |
1420 | struct btrfs_path *path, | |
1421 | struct btrfs_key *cpu_key, u32 *data_size, int nr); | |
1422 | ||
1423 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, | |
1424 | struct btrfs_root *root, | |
1425 | struct btrfs_path *path, | |
1426 | struct btrfs_key *key, | |
1427 | u32 data_size) | |
1428 | { | |
1429 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); | |
1430 | } | |
1431 | ||
234b63a0 | 1432 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
7bb86316 | 1433 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
5f39d397 | 1434 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
e089f05c | 1435 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
9f3a7427 | 1436 | *root); |
dee26a9f | 1437 | /* root-item.c */ |
e089f05c CM |
1438 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
1439 | struct btrfs_key *key); | |
1440 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
1441 | *root, struct btrfs_key *key, struct btrfs_root_item | |
1442 | *item); | |
1443 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
1444 | *root, struct btrfs_key *key, struct btrfs_root_item | |
1445 | *item); | |
1446 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct | |
1447 | btrfs_root_item *item, struct btrfs_key *key); | |
5ce14bbc CM |
1448 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid, |
1449 | struct btrfs_root *latest_root); | |
dee26a9f | 1450 | /* dir-item.c */ |
e089f05c | 1451 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
1452 | *root, const char *name, int name_len, u64 dir, |
1453 | struct btrfs_key *location, u8 type); | |
7e38180e CM |
1454 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
1455 | struct btrfs_root *root, | |
1456 | struct btrfs_path *path, u64 dir, | |
1457 | const char *name, int name_len, | |
1458 | int mod); | |
1459 | struct btrfs_dir_item * | |
1460 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | |
1461 | struct btrfs_root *root, | |
1462 | struct btrfs_path *path, u64 dir, | |
1463 | u64 objectid, const char *name, int name_len, | |
1464 | int mod); | |
1465 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, | |
1466 | struct btrfs_path *path, | |
7f5c1516 | 1467 | const char *name, int name_len); |
7e38180e CM |
1468 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
1469 | struct btrfs_root *root, | |
1470 | struct btrfs_path *path, | |
1471 | struct btrfs_dir_item *di); | |
5103e947 JB |
1472 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
1473 | struct btrfs_root *root, const char *name, | |
1474 | u16 name_len, const void *data, u16 data_len, | |
1475 | u64 dir); | |
1476 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, | |
1477 | struct btrfs_root *root, | |
1478 | struct btrfs_path *path, u64 dir, | |
1479 | const char *name, u16 name_len, | |
1480 | int mod); | |
dee26a9f | 1481 | /* inode-map.c */ |
9f5fae2f CM |
1482 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
1483 | struct btrfs_root *fs_root, | |
1484 | u64 dirid, u64 *objectid); | |
5be6f7f1 CM |
1485 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
1486 | ||
dee26a9f | 1487 | /* inode-item.c */ |
3954401f CM |
1488 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
1489 | struct btrfs_root *root, | |
1490 | const char *name, int name_len, | |
1491 | u64 inode_objectid, u64 ref_objectid); | |
1492 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, | |
1493 | struct btrfs_root *root, | |
1494 | const char *name, int name_len, | |
1495 | u64 inode_objectid, u64 ref_objectid); | |
5f39d397 CM |
1496 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
1497 | struct btrfs_root *root, | |
1498 | struct btrfs_path *path, u64 objectid); | |
293ffd5f | 1499 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
1500 | *root, struct btrfs_path *path, |
1501 | struct btrfs_key *location, int mod); | |
dee26a9f CM |
1502 | |
1503 | /* file-item.c */ | |
b18c6685 | 1504 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
dee26a9f | 1505 | struct btrfs_root *root, |
b18c6685 | 1506 | u64 objectid, u64 pos, u64 offset, |
db94535d CM |
1507 | u64 disk_num_bytes, |
1508 | u64 num_bytes); | |
dee26a9f CM |
1509 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
1510 | struct btrfs_root *root, | |
1511 | struct btrfs_path *path, u64 objectid, | |
db94535d | 1512 | u64 bytenr, int mod); |
065631f6 CM |
1513 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
1514 | struct btrfs_root *root, struct inode *inode, | |
1515 | struct bio *bio); | |
b18c6685 CM |
1516 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
1517 | struct btrfs_root *root, | |
1518 | struct btrfs_path *path, | |
1519 | u64 objectid, u64 offset, | |
1520 | int cow); | |
1de037a4 CM |
1521 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
1522 | struct btrfs_root *root, struct btrfs_path *path, | |
1523 | u64 isize); | |
39279cc3 | 1524 | /* inode.c */ |
239b14b3 CM |
1525 | int btrfs_merge_bio_hook(struct page *page, unsigned long offset, |
1526 | size_t size, struct bio *bio); | |
1527 | ||
9069218d CM |
1528 | static inline void dec_i_blocks(struct inode *inode, u64 dec) |
1529 | { | |
1530 | dec = dec >> 9; | |
1531 | if (dec <= inode->i_blocks) | |
1532 | inode->i_blocks -= dec; | |
1533 | else | |
1534 | inode->i_blocks = 0; | |
1535 | } | |
1536 | ||
edbd8d4e CM |
1537 | unsigned long btrfs_force_ra(struct address_space *mapping, |
1538 | struct file_ra_state *ra, struct file *file, | |
1539 | pgoff_t offset, pgoff_t last_index); | |
1832a6d5 CM |
1540 | int btrfs_check_free_space(struct btrfs_root *root, u64 num_required, |
1541 | int for_del); | |
9ebefb18 CM |
1542 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page); |
1543 | int btrfs_readpage(struct file *file, struct page *page); | |
39279cc3 | 1544 | void btrfs_delete_inode(struct inode *inode); |
2da98f00 | 1545 | void btrfs_put_inode(struct inode *inode); |
39279cc3 CM |
1546 | void btrfs_read_locked_inode(struct inode *inode); |
1547 | int btrfs_write_inode(struct inode *inode, int wait); | |
1548 | void btrfs_dirty_inode(struct inode *inode); | |
1549 | struct inode *btrfs_alloc_inode(struct super_block *sb); | |
1550 | void btrfs_destroy_inode(struct inode *inode); | |
1551 | int btrfs_init_cachep(void); | |
1552 | void btrfs_destroy_cachep(void); | |
34287aa3 | 1553 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
39279cc3 CM |
1554 | struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid, |
1555 | struct btrfs_root *root); | |
dc17ff8f CM |
1556 | struct inode *btrfs_ilookup(struct super_block *s, u64 objectid, |
1557 | u64 root_objectid); | |
39279cc3 CM |
1558 | int btrfs_commit_write(struct file *file, struct page *page, |
1559 | unsigned from, unsigned to); | |
a52d9a80 CM |
1560 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
1561 | size_t page_offset, u64 start, u64 end, | |
1562 | int create); | |
1563 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
1564 | struct btrfs_root *root, | |
1565 | struct inode *inode); | |
39279cc3 | 1566 | /* file.c */ |
a52d9a80 | 1567 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end); |
5f56406a | 1568 | int btrfs_check_file(struct btrfs_root *root, struct inode *inode); |
39279cc3 CM |
1569 | extern struct file_operations btrfs_file_operations; |
1570 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, | |
1571 | struct btrfs_root *root, struct inode *inode, | |
00f5c795 | 1572 | u64 start, u64 end, u64 inline_limit, u64 *hint_block); |
6702ed49 CM |
1573 | /* tree-defrag.c */ |
1574 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | |
1575 | struct btrfs_root *root, int cache_only); | |
58176a96 JB |
1576 | |
1577 | /* sysfs.c */ | |
1578 | int btrfs_init_sysfs(void); | |
1579 | void btrfs_exit_sysfs(void); | |
1580 | int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); | |
1581 | int btrfs_sysfs_add_root(struct btrfs_root *root); | |
1582 | void btrfs_sysfs_del_root(struct btrfs_root *root); | |
1583 | void btrfs_sysfs_del_super(struct btrfs_fs_info *root); | |
1584 | ||
5103e947 JB |
1585 | /* xattr.c */ |
1586 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
1587 | int btrfs_delete_xattrs(struct btrfs_trans_handle *trans, | |
1588 | struct btrfs_root *root, struct inode *inode); | |
edbd8d4e CM |
1589 | /* super.c */ |
1590 | u64 btrfs_parse_size(char *str); | |
eb60ceac | 1591 | #endif |