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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 | ||
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" |
8b712842 | 33 | #include "async-thread.h" |
e20d96d6 | 34 | |
e089f05c | 35 | struct btrfs_trans_handle; |
79154b1b | 36 | struct btrfs_transaction; |
35b7e476 CM |
37 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
38 | extern struct kmem_cache *btrfs_transaction_cachep; | |
39 | extern struct kmem_cache *btrfs_bit_radix_cachep; | |
2c90e5d6 | 40 | extern struct kmem_cache *btrfs_path_cachep; |
e089f05c | 41 | |
8a4b83cc | 42 | #define BTRFS_MAGIC "_B5RfS_M" |
eb60ceac | 43 | |
f6dbff55 | 44 | #define BTRFS_MAX_LEVEL 8 |
0b86a832 CM |
45 | |
46 | /* holds pointers to all of the tree roots */ | |
6407bf6d | 47 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
0b86a832 CM |
48 | |
49 | /* stores information about which extents are in use, and reference counts */ | |
0cf6c620 | 50 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
0b86a832 | 51 | |
0b86a832 CM |
52 | /* |
53 | * chunk tree stores translations from logical -> physical block numbering | |
54 | * the super block points to the chunk tree | |
55 | */ | |
e085def2 | 56 | #define BTRFS_CHUNK_TREE_OBJECTID 3ULL |
0b86a832 CM |
57 | |
58 | /* | |
59 | * stores information about which areas of a given device are in use. | |
60 | * one per device. The tree of tree roots points to the device tree | |
61 | */ | |
e085def2 CM |
62 | #define BTRFS_DEV_TREE_OBJECTID 4ULL |
63 | ||
64 | /* one per subvolume, storing files and directories */ | |
65 | #define BTRFS_FS_TREE_OBJECTID 5ULL | |
66 | ||
67 | /* directory objectid inside the root tree */ | |
68 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL | |
0b86a832 CM |
69 | |
70 | /* | |
71 | * All files have objectids higher than this. | |
72 | */ | |
f6dbff55 | 73 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
e17cade2 | 74 | #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL |
3768f368 | 75 | |
0b86a832 CM |
76 | |
77 | /* | |
78 | * the device items go into the chunk tree. The key is in the form | |
79 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] | |
80 | */ | |
81 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL | |
82 | ||
e20d96d6 CM |
83 | /* |
84 | * we can actually store much bigger names, but lets not confuse the rest | |
85 | * of linux | |
86 | */ | |
87 | #define BTRFS_NAME_LEN 255 | |
88 | ||
f254e52c CM |
89 | /* 32 bytes in various csum fields */ |
90 | #define BTRFS_CSUM_SIZE 32 | |
509659cd CM |
91 | /* four bytes for CRC32 */ |
92 | #define BTRFS_CRC32_SIZE 4 | |
3954401f | 93 | #define BTRFS_EMPTY_DIR_SIZE 0 |
f254e52c | 94 | |
fabb5681 CM |
95 | #define BTRFS_FT_UNKNOWN 0 |
96 | #define BTRFS_FT_REG_FILE 1 | |
97 | #define BTRFS_FT_DIR 2 | |
98 | #define BTRFS_FT_CHRDEV 3 | |
99 | #define BTRFS_FT_BLKDEV 4 | |
100 | #define BTRFS_FT_FIFO 5 | |
101 | #define BTRFS_FT_SOCK 6 | |
102 | #define BTRFS_FT_SYMLINK 7 | |
5103e947 JB |
103 | #define BTRFS_FT_XATTR 8 |
104 | #define BTRFS_FT_MAX 9 | |
fabb5681 | 105 | |
fec577fb CM |
106 | /* |
107 | * the key defines the order in the tree, and so it also defines (optimal) | |
108 | * block layout. objectid corresonds to the inode number. The flags | |
109 | * tells us things about the object, and is a kind of stream selector. | |
110 | * so for a given inode, keys with flags of 1 might refer to the inode | |
111 | * data, flags of 2 may point to file data in the btree and flags == 3 | |
112 | * may point to extents. | |
113 | * | |
114 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
115 | * |
116 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
117 | * in cpu native order. Otherwise they are identical and their sizes | |
118 | * should be the same (ie both packed) | |
fec577fb | 119 | */ |
e2fa7227 CM |
120 | struct btrfs_disk_key { |
121 | __le64 objectid; | |
5f39d397 | 122 | u8 type; |
70b2befd | 123 | __le64 offset; |
e2fa7227 CM |
124 | } __attribute__ ((__packed__)); |
125 | ||
126 | struct btrfs_key { | |
eb60ceac | 127 | u64 objectid; |
5f39d397 | 128 | u8 type; |
70b2befd | 129 | u64 offset; |
eb60ceac CM |
130 | } __attribute__ ((__packed__)); |
131 | ||
0b86a832 CM |
132 | struct btrfs_mapping_tree { |
133 | struct extent_map_tree map_tree; | |
134 | }; | |
135 | ||
e17cade2 | 136 | #define BTRFS_UUID_SIZE 16 |
0b86a832 CM |
137 | struct btrfs_dev_item { |
138 | /* the internal btrfs device id */ | |
139 | __le64 devid; | |
140 | ||
141 | /* size of the device */ | |
142 | __le64 total_bytes; | |
143 | ||
144 | /* bytes used */ | |
145 | __le64 bytes_used; | |
146 | ||
147 | /* optimal io alignment for this device */ | |
148 | __le32 io_align; | |
149 | ||
150 | /* optimal io width for this device */ | |
151 | __le32 io_width; | |
152 | ||
153 | /* minimal io size for this device */ | |
154 | __le32 sector_size; | |
155 | ||
0b86a832 CM |
156 | /* type and info about this device */ |
157 | __le64 type; | |
158 | ||
e17cade2 CM |
159 | /* grouping information for allocation decisions */ |
160 | __le32 dev_group; | |
161 | ||
162 | /* seek speed 0-100 where 100 is fastest */ | |
163 | u8 seek_speed; | |
164 | ||
165 | /* bandwidth 0-100 where 100 is fastest */ | |
166 | u8 bandwidth; | |
167 | ||
0d81ba5d | 168 | /* btrfs generated uuid for this device */ |
e17cade2 | 169 | u8 uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
170 | } __attribute__ ((__packed__)); |
171 | ||
172 | struct btrfs_stripe { | |
173 | __le64 devid; | |
174 | __le64 offset; | |
e17cade2 | 175 | u8 dev_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
176 | } __attribute__ ((__packed__)); |
177 | ||
178 | struct btrfs_chunk { | |
e17cade2 CM |
179 | /* size of this chunk in bytes */ |
180 | __le64 length; | |
181 | ||
182 | /* objectid of the root referencing this chunk */ | |
0b86a832 | 183 | __le64 owner; |
e17cade2 | 184 | |
0b86a832 CM |
185 | __le64 stripe_len; |
186 | __le64 type; | |
187 | ||
188 | /* optimal io alignment for this chunk */ | |
189 | __le32 io_align; | |
190 | ||
191 | /* optimal io width for this chunk */ | |
192 | __le32 io_width; | |
193 | ||
194 | /* minimal io size for this chunk */ | |
195 | __le32 sector_size; | |
196 | ||
197 | /* 2^16 stripes is quite a lot, a second limit is the size of a single | |
198 | * item in the btree | |
199 | */ | |
200 | __le16 num_stripes; | |
321aecc6 CM |
201 | |
202 | /* sub stripes only matter for raid10 */ | |
203 | __le16 sub_stripes; | |
0b86a832 CM |
204 | struct btrfs_stripe stripe; |
205 | /* additional stripes go here */ | |
206 | } __attribute__ ((__packed__)); | |
207 | ||
208 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) | |
209 | { | |
210 | BUG_ON(num_stripes == 0); | |
211 | return sizeof(struct btrfs_chunk) + | |
212 | sizeof(struct btrfs_stripe) * (num_stripes - 1); | |
213 | } | |
214 | ||
5f39d397 | 215 | #define BTRFS_FSID_SIZE 16 |
63b10fc4 CM |
216 | #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0) |
217 | ||
fec577fb CM |
218 | /* |
219 | * every tree block (leaf or node) starts with this header. | |
220 | */ | |
bb492bb0 | 221 | struct btrfs_header { |
e17cade2 | 222 | /* these first four must match the super block */ |
f254e52c | 223 | u8 csum[BTRFS_CSUM_SIZE]; |
5f39d397 | 224 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 225 | __le64 bytenr; /* which block this node is supposed to live in */ |
63b10fc4 | 226 | __le64 flags; |
e17cade2 CM |
227 | |
228 | /* allowed to be different from the super from here on down */ | |
229 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; | |
7f5c1516 | 230 | __le64 generation; |
4d775673 | 231 | __le64 owner; |
5f39d397 | 232 | __le32 nritems; |
9a6f11ed | 233 | u8 level; |
eb60ceac CM |
234 | } __attribute__ ((__packed__)); |
235 | ||
5f39d397 | 236 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
123abc88 | 237 | sizeof(struct btrfs_header)) / \ |
74493f7a | 238 | sizeof(struct btrfs_key_ptr)) |
123abc88 | 239 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
5f39d397 | 240 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
236454df CM |
241 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
242 | sizeof(struct btrfs_item) - \ | |
243 | sizeof(struct btrfs_file_extent_item)) | |
eb60ceac | 244 | |
0b86a832 CM |
245 | |
246 | /* | |
247 | * this is a very generous portion of the super block, giving us | |
248 | * room to translate 14 chunks with 3 stripes each. | |
249 | */ | |
250 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 | |
7ae9c09d | 251 | #define BTRFS_LABEL_SIZE 256 |
0b86a832 | 252 | |
fec577fb CM |
253 | /* |
254 | * the super block basically lists the main trees of the FS | |
255 | * it currently lacks any block count etc etc | |
256 | */ | |
234b63a0 | 257 | struct btrfs_super_block { |
f254e52c | 258 | u8 csum[BTRFS_CSUM_SIZE]; |
63b10fc4 | 259 | /* the first 4 fields must match struct btrfs_header */ |
3768f368 | 260 | u8 fsid[16]; /* FS specific uuid */ |
db94535d | 261 | __le64 bytenr; /* this block number */ |
63b10fc4 | 262 | __le64 flags; |
e17cade2 CM |
263 | |
264 | /* allowed to be different from the btrfs_header from here own down */ | |
3768f368 | 265 | __le64 magic; |
3768f368 CM |
266 | __le64 generation; |
267 | __le64 root; | |
0b86a832 | 268 | __le64 chunk_root; |
db94535d CM |
269 | __le64 total_bytes; |
270 | __le64 bytes_used; | |
2e635a27 | 271 | __le64 root_dir_objectid; |
8a4b83cc | 272 | __le64 num_devices; |
5f39d397 CM |
273 | __le32 sectorsize; |
274 | __le32 nodesize; | |
275 | __le32 leafsize; | |
87ee04eb | 276 | __le32 stripesize; |
0b86a832 | 277 | __le32 sys_chunk_array_size; |
db94535d | 278 | u8 root_level; |
0b86a832 | 279 | u8 chunk_root_level; |
0d81ba5d | 280 | struct btrfs_dev_item dev_item; |
7ae9c09d | 281 | char label[BTRFS_LABEL_SIZE]; |
0b86a832 | 282 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
cfaa7295 CM |
283 | } __attribute__ ((__packed__)); |
284 | ||
fec577fb | 285 | /* |
62e2749e | 286 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
287 | * the item in the leaf (relative to the start of the data area) |
288 | */ | |
0783fcfc | 289 | struct btrfs_item { |
e2fa7227 | 290 | struct btrfs_disk_key key; |
123abc88 | 291 | __le32 offset; |
5f39d397 | 292 | __le32 size; |
eb60ceac CM |
293 | } __attribute__ ((__packed__)); |
294 | ||
fec577fb CM |
295 | /* |
296 | * leaves have an item area and a data area: | |
297 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
298 | * | |
299 | * The data is separate from the items to get the keys closer together | |
300 | * during searches. | |
301 | */ | |
234b63a0 | 302 | struct btrfs_leaf { |
bb492bb0 | 303 | struct btrfs_header header; |
123abc88 | 304 | struct btrfs_item items[]; |
eb60ceac CM |
305 | } __attribute__ ((__packed__)); |
306 | ||
fec577fb CM |
307 | /* |
308 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
309 | * other blocks | |
310 | */ | |
123abc88 CM |
311 | struct btrfs_key_ptr { |
312 | struct btrfs_disk_key key; | |
313 | __le64 blockptr; | |
74493f7a | 314 | __le64 generation; |
123abc88 CM |
315 | } __attribute__ ((__packed__)); |
316 | ||
234b63a0 | 317 | struct btrfs_node { |
bb492bb0 | 318 | struct btrfs_header header; |
123abc88 | 319 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
320 | } __attribute__ ((__packed__)); |
321 | ||
fec577fb | 322 | /* |
234b63a0 CM |
323 | * btrfs_paths remember the path taken from the root down to the leaf. |
324 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
325 | * to any other levels that are present. |
326 | * | |
327 | * The slots array records the index of the item or block pointer | |
328 | * used while walking the tree. | |
329 | */ | |
234b63a0 | 330 | struct btrfs_path { |
5f39d397 | 331 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
234b63a0 | 332 | int slots[BTRFS_MAX_LEVEL]; |
3c69faec | 333 | int reada; |
6702ed49 | 334 | int lowest_level; |
eb60ceac | 335 | }; |
5de08d7d | 336 | |
62e2749e CM |
337 | /* |
338 | * items in the extent btree are used to record the objectid of the | |
339 | * owner of the block and the number of references | |
340 | */ | |
341 | struct btrfs_extent_item { | |
342 | __le32 refs; | |
74493f7a CM |
343 | } __attribute__ ((__packed__)); |
344 | ||
345 | struct btrfs_extent_ref { | |
346 | __le64 root; | |
347 | __le64 generation; | |
348 | __le64 objectid; | |
349 | __le64 offset; | |
62e2749e CM |
350 | } __attribute__ ((__packed__)); |
351 | ||
0b86a832 CM |
352 | /* dev extents record free space on individual devices. The owner |
353 | * field points back to the chunk allocation mapping tree that allocated | |
e17cade2 | 354 | * the extent. The chunk tree uuid field is a way to double check the owner |
0b86a832 CM |
355 | */ |
356 | struct btrfs_dev_extent { | |
e17cade2 CM |
357 | __le64 chunk_tree; |
358 | __le64 chunk_objectid; | |
359 | __le64 chunk_offset; | |
0b86a832 | 360 | __le64 length; |
e17cade2 | 361 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
362 | } __attribute__ ((__packed__)); |
363 | ||
3954401f CM |
364 | struct btrfs_inode_ref { |
365 | __le16 name_len; | |
366 | /* name goes here */ | |
367 | } __attribute__ ((__packed__)); | |
368 | ||
0b86a832 | 369 | struct btrfs_timespec { |
f254e52c | 370 | __le64 sec; |
1e1d2701 CM |
371 | __le32 nsec; |
372 | } __attribute__ ((__packed__)); | |
373 | ||
374 | /* | |
375 | * there is no padding here on purpose. If you want to extent the inode, | |
376 | * make a new item type | |
377 | */ | |
378 | struct btrfs_inode_item { | |
379 | __le64 generation; | |
380 | __le64 size; | |
381 | __le64 nblocks; | |
31f3c99b | 382 | __le64 block_group; |
1e1d2701 CM |
383 | __le32 nlink; |
384 | __le32 uid; | |
385 | __le32 gid; | |
386 | __le32 mode; | |
0b86a832 | 387 | __le64 rdev; |
1e1d2701 CM |
388 | __le16 flags; |
389 | __le16 compat_flags; | |
0b86a832 CM |
390 | struct btrfs_timespec atime; |
391 | struct btrfs_timespec ctime; | |
392 | struct btrfs_timespec mtime; | |
393 | struct btrfs_timespec otime; | |
1e1d2701 CM |
394 | } __attribute__ ((__packed__)); |
395 | ||
62e2749e | 396 | struct btrfs_dir_item { |
d6e4a428 | 397 | struct btrfs_disk_key location; |
5103e947 | 398 | __le16 data_len; |
a8a2ee0c | 399 | __le16 name_len; |
62e2749e CM |
400 | u8 type; |
401 | } __attribute__ ((__packed__)); | |
402 | ||
403 | struct btrfs_root_item { | |
d6e4a428 CM |
404 | struct btrfs_inode_item inode; |
405 | __le64 root_dirid; | |
db94535d CM |
406 | __le64 bytenr; |
407 | __le64 byte_limit; | |
408 | __le64 bytes_used; | |
5eda7b5e | 409 | __le32 flags; |
62e2749e | 410 | __le32 refs; |
5eda7b5e CM |
411 | struct btrfs_disk_key drop_progress; |
412 | u8 drop_level; | |
db94535d | 413 | u8 level; |
9f5fae2f | 414 | } __attribute__ ((__packed__)); |
62e2749e | 415 | |
236454df CM |
416 | #define BTRFS_FILE_EXTENT_REG 0 |
417 | #define BTRFS_FILE_EXTENT_INLINE 1 | |
418 | ||
9f5fae2f | 419 | struct btrfs_file_extent_item { |
71951f35 | 420 | __le64 generation; |
236454df | 421 | u8 type; |
9f5fae2f CM |
422 | /* |
423 | * disk space consumed by the extent, checksum blocks are included | |
424 | * in these numbers | |
425 | */ | |
db94535d CM |
426 | __le64 disk_bytenr; |
427 | __le64 disk_num_bytes; | |
9f5fae2f | 428 | /* |
dee26a9f | 429 | * the logical offset in file blocks (no csums) |
9f5fae2f CM |
430 | * this extent record is for. This allows a file extent to point |
431 | * into the middle of an existing extent on disk, sharing it | |
432 | * between two snapshots (useful if some bytes in the middle of the | |
433 | * extent have changed | |
434 | */ | |
435 | __le64 offset; | |
436 | /* | |
437 | * the logical number of file blocks (no csums included) | |
438 | */ | |
db94535d | 439 | __le64 num_bytes; |
9f5fae2f CM |
440 | } __attribute__ ((__packed__)); |
441 | ||
f254e52c | 442 | struct btrfs_csum_item { |
509659cd | 443 | u8 csum; |
f254e52c CM |
444 | } __attribute__ ((__packed__)); |
445 | ||
0b86a832 CM |
446 | /* different types of block groups (and chunks) */ |
447 | #define BTRFS_BLOCK_GROUP_DATA (1 << 0) | |
448 | #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1) | |
449 | #define BTRFS_BLOCK_GROUP_METADATA (1 << 2) | |
593060d7 | 450 | #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3) |
8790d502 | 451 | #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4) |
611f0e00 | 452 | #define BTRFS_BLOCK_GROUP_DUP (1 << 5) |
321aecc6 | 453 | #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6) |
1e2677e0 | 454 | |
f84a8b36 | 455 | |
9078a3e1 CM |
456 | struct btrfs_block_group_item { |
457 | __le64 used; | |
0b86a832 CM |
458 | __le64 chunk_objectid; |
459 | __le64 flags; | |
9078a3e1 CM |
460 | } __attribute__ ((__packed__)); |
461 | ||
6324fbf3 CM |
462 | struct btrfs_space_info { |
463 | u64 flags; | |
464 | u64 total_bytes; | |
465 | u64 bytes_used; | |
466 | u64 bytes_pinned; | |
467 | int full; | |
0ef3e66b | 468 | int force_alloc; |
6324fbf3 CM |
469 | struct list_head list; |
470 | }; | |
471 | ||
9078a3e1 CM |
472 | struct btrfs_block_group_cache { |
473 | struct btrfs_key key; | |
474 | struct btrfs_block_group_item item; | |
6324fbf3 | 475 | struct btrfs_space_info *space_info; |
324ae4df | 476 | u64 pinned; |
0b86a832 CM |
477 | u64 flags; |
478 | int cached; | |
8f18cf13 | 479 | int ro; |
9078a3e1 | 480 | }; |
0b86a832 CM |
481 | |
482 | struct btrfs_device; | |
8a4b83cc | 483 | struct btrfs_fs_devices; |
9f5fae2f | 484 | struct btrfs_fs_info { |
5f39d397 | 485 | u8 fsid[BTRFS_FSID_SIZE]; |
e17cade2 | 486 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
62e2749e CM |
487 | struct btrfs_root *extent_root; |
488 | struct btrfs_root *tree_root; | |
0b86a832 CM |
489 | struct btrfs_root *chunk_root; |
490 | struct btrfs_root *dev_root; | |
0f7d52f4 | 491 | struct radix_tree_root fs_roots_radix; |
1a5bc167 | 492 | |
d1310b2e CM |
493 | struct extent_io_tree free_space_cache; |
494 | struct extent_io_tree block_group_cache; | |
495 | struct extent_io_tree pinned_extents; | |
496 | struct extent_io_tree pending_del; | |
497 | struct extent_io_tree extent_ins; | |
1a5bc167 | 498 | |
0b86a832 CM |
499 | /* logical->physical extent mapping */ |
500 | struct btrfs_mapping_tree mapping_tree; | |
501 | ||
293ffd5f | 502 | u64 generation; |
15ee9bc7 | 503 | u64 last_trans_committed; |
b6cda9bc | 504 | unsigned long mount_opt; |
c59f8951 | 505 | u64 max_extent; |
6f568d35 | 506 | u64 max_inline; |
8f662a76 | 507 | u64 alloc_start; |
79154b1b | 508 | struct btrfs_transaction *running_transaction; |
4b52dff6 | 509 | struct btrfs_super_block super_copy; |
a061fc8d | 510 | struct btrfs_super_block super_for_commit; |
0b86a832 | 511 | struct block_device *__bdev; |
e20d96d6 | 512 | struct super_block *sb; |
d98237b3 | 513 | struct inode *btree_inode; |
04160088 | 514 | struct backing_dev_info bdi; |
19c00ddc | 515 | spinlock_t hash_lock; |
79154b1b | 516 | struct mutex trans_mutex; |
d561c025 | 517 | struct mutex fs_mutex; |
8fd17795 | 518 | struct list_head trans_list; |
19c00ddc | 519 | struct list_head hashers; |
facda1e7 | 520 | struct list_head dead_roots; |
ce9adaa5 CM |
521 | struct list_head end_io_work_list; |
522 | struct work_struct end_io_work; | |
523 | spinlock_t end_io_work_lock; | |
cb03c743 | 524 | atomic_t nr_async_submits; |
ce9adaa5 | 525 | |
8b712842 CM |
526 | /* |
527 | * there is a pool of worker threads for checksumming during writes | |
528 | * and a pool for checksumming after reads. This is because readers | |
529 | * can run with FS locks held, and the writers may be waiting for | |
530 | * those locks. We don't want ordering in the pending list to cause | |
531 | * deadlocks, and so the two are serviced separately. | |
532 | */ | |
533 | struct btrfs_workers workers; | |
534 | struct btrfs_workers endio_workers; | |
535 | ||
6da6abae CM |
536 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) |
537 | struct work_struct trans_work; | |
538 | #else | |
08607c1b | 539 | struct delayed_work trans_work; |
6da6abae | 540 | #endif |
58176a96 JB |
541 | struct kobject super_kobj; |
542 | struct completion kobj_unregister; | |
e66f709b | 543 | int do_barriers; |
facda1e7 | 544 | int closing; |
e2008b61 | 545 | unsigned long throttles; |
9f5fae2f | 546 | |
324ae4df | 547 | u64 total_pinned; |
0b86a832 CM |
548 | struct list_head dirty_cowonly_roots; |
549 | ||
8a4b83cc | 550 | struct btrfs_fs_devices *fs_devices; |
6324fbf3 | 551 | struct list_head space_info; |
1832a6d5 | 552 | spinlock_t delalloc_lock; |
cee36a03 | 553 | spinlock_t new_trans_lock; |
1832a6d5 | 554 | u64 delalloc_bytes; |
e18e4809 | 555 | u64 last_alloc; |
4529ba49 | 556 | u64 last_data_alloc; |
d18a2c44 CM |
557 | |
558 | u64 avail_data_alloc_bits; | |
559 | u64 avail_metadata_alloc_bits; | |
560 | u64 avail_system_alloc_bits; | |
561 | u64 data_alloc_profile; | |
562 | u64 metadata_alloc_profile; | |
563 | u64 system_alloc_profile; | |
788f20eb CM |
564 | |
565 | void *bdev_holder; | |
324ae4df | 566 | }; |
0b86a832 | 567 | |
9f5fae2f CM |
568 | /* |
569 | * in ram representation of the tree. extent_root is used for all allocations | |
f2458e1d | 570 | * and for the extent tree extent_root root. |
9f5fae2f CM |
571 | */ |
572 | struct btrfs_root { | |
5f39d397 CM |
573 | struct extent_buffer *node; |
574 | struct extent_buffer *commit_root; | |
62e2749e CM |
575 | struct btrfs_root_item root_item; |
576 | struct btrfs_key root_key; | |
9f5fae2f | 577 | struct btrfs_fs_info *fs_info; |
0f7d52f4 | 578 | struct inode *inode; |
58176a96 JB |
579 | struct kobject root_kobj; |
580 | struct completion kobj_unregister; | |
0f7d52f4 CM |
581 | u64 objectid; |
582 | u64 last_trans; | |
5f39d397 CM |
583 | |
584 | /* data allocations are done in sectorsize units */ | |
585 | u32 sectorsize; | |
586 | ||
587 | /* node allocations are done in nodesize units */ | |
588 | u32 nodesize; | |
589 | ||
590 | /* leaf allocations are done in leafsize units */ | |
591 | u32 leafsize; | |
592 | ||
87ee04eb CM |
593 | u32 stripesize; |
594 | ||
9f5fae2f | 595 | u32 type; |
1b05da2e CM |
596 | u64 highest_inode; |
597 | u64 last_inode_alloc; | |
9f3a7427 | 598 | int ref_cows; |
0b86a832 | 599 | int track_dirty; |
6702ed49 | 600 | struct btrfs_key defrag_progress; |
0ef3e66b | 601 | struct btrfs_key defrag_max; |
6702ed49 CM |
602 | int defrag_running; |
603 | int defrag_level; | |
58176a96 | 604 | char *name; |
4313b399 | 605 | int in_sysfs; |
0b86a832 CM |
606 | |
607 | /* the dirty list is only used by non-reference counted roots */ | |
608 | struct list_head dirty_list; | |
62e2749e CM |
609 | }; |
610 | ||
1e1d2701 | 611 | /* |
0b86a832 | 612 | |
1e1d2701 CM |
613 | * inode items have the data typically returned from stat and store other |
614 | * info about object characteristics. There is one for every file and dir in | |
615 | * the FS | |
616 | */ | |
9078a3e1 | 617 | #define BTRFS_INODE_ITEM_KEY 1 |
3954401f CM |
618 | #define BTRFS_INODE_REF_KEY 2 |
619 | #define BTRFS_XATTR_ITEM_KEY 8 | |
9078a3e1 | 620 | /* reserve 2-15 close to the inode for later flexibility */ |
1e1d2701 CM |
621 | |
622 | /* | |
623 | * dir items are the name -> inode pointers in a directory. There is one | |
624 | * for every name in a directory. | |
625 | */ | |
9078a3e1 CM |
626 | #define BTRFS_DIR_ITEM_KEY 16 |
627 | #define BTRFS_DIR_INDEX_KEY 17 | |
1e1d2701 | 628 | /* |
9078a3e1 | 629 | * extent data is for file data |
1e1d2701 | 630 | */ |
9078a3e1 | 631 | #define BTRFS_EXTENT_DATA_KEY 18 |
f254e52c CM |
632 | /* |
633 | * csum items have the checksums for data in the extents | |
634 | */ | |
9078a3e1 CM |
635 | #define BTRFS_CSUM_ITEM_KEY 19 |
636 | ||
637 | /* reserve 20-31 for other file stuff */ | |
f254e52c | 638 | |
1e1d2701 CM |
639 | /* |
640 | * root items point to tree roots. There are typically in the root | |
641 | * tree used by the super block to find all the other trees | |
642 | */ | |
9078a3e1 | 643 | #define BTRFS_ROOT_ITEM_KEY 32 |
1e1d2701 CM |
644 | /* |
645 | * extent items are in the extent map tree. These record which blocks | |
646 | * are used, and how many references there are to each block | |
647 | */ | |
9078a3e1 | 648 | #define BTRFS_EXTENT_ITEM_KEY 33 |
74493f7a | 649 | #define BTRFS_EXTENT_REF_KEY 34 |
9078a3e1 CM |
650 | |
651 | /* | |
652 | * block groups give us hints into the extent allocation trees. Which | |
653 | * blocks are free etc etc | |
654 | */ | |
74493f7a | 655 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 50 |
9f5fae2f | 656 | |
0b86a832 CM |
657 | #define BTRFS_DEV_EXTENT_KEY 75 |
658 | #define BTRFS_DEV_ITEM_KEY 76 | |
659 | #define BTRFS_CHUNK_ITEM_KEY 77 | |
660 | ||
1e1d2701 CM |
661 | /* |
662 | * string items are for debugging. They just store a short string of | |
663 | * data in the FS | |
664 | */ | |
9078a3e1 CM |
665 | #define BTRFS_STRING_ITEM_KEY 253 |
666 | ||
21ad10cf CM |
667 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
668 | #define BTRFS_MOUNT_NODATACOW (1 << 1) | |
669 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) | |
e18e4809 | 670 | #define BTRFS_MOUNT_SSD (1 << 3) |
dfe25020 | 671 | #define BTRFS_MOUNT_DEGRADED (1 << 4) |
b6cda9bc CM |
672 | |
673 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) | |
674 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) | |
675 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ | |
676 | BTRFS_MOUNT_##opt) | |
b98b6767 Y |
677 | /* |
678 | * Inode flags | |
679 | */ | |
fdebe2bd Y |
680 | #define BTRFS_INODE_NODATASUM (1 << 0) |
681 | #define BTRFS_INODE_NODATACOW (1 << 1) | |
682 | #define BTRFS_INODE_READONLY (1 << 2) | |
b98b6767 Y |
683 | #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \ |
684 | ~BTRFS_INODE_##flag) | |
685 | #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \ | |
686 | BTRFS_INODE_##flag) | |
687 | #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \ | |
688 | BTRFS_INODE_##flag) | |
5f39d397 CM |
689 | /* some macros to generate set/get funcs for the struct fields. This |
690 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | |
691 | * one for u8: | |
692 | */ | |
693 | #define le8_to_cpu(v) (v) | |
694 | #define cpu_to_le8(v) (v) | |
695 | #define __le8 u8 | |
696 | ||
697 | #define read_eb_member(eb, ptr, type, member, result) ( \ | |
698 | read_extent_buffer(eb, (char *)(result), \ | |
699 | ((unsigned long)(ptr)) + \ | |
700 | offsetof(type, member), \ | |
701 | sizeof(((type *)0)->member))) | |
702 | ||
703 | #define write_eb_member(eb, ptr, type, member, result) ( \ | |
704 | write_extent_buffer(eb, (char *)(result), \ | |
705 | ((unsigned long)(ptr)) + \ | |
706 | offsetof(type, member), \ | |
707 | sizeof(((type *)0)->member))) | |
708 | ||
0f82731f | 709 | #ifndef BTRFS_SETGET_FUNCS |
5f39d397 | 710 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
0f82731f CM |
711 | u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ |
712 | void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); | |
713 | #endif | |
5f39d397 CM |
714 | |
715 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | |
716 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | |
717 | { \ | |
df68b8a7 DM |
718 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
719 | u##bits res = le##bits##_to_cpu(p->member); \ | |
720 | kunmap_atomic(p, KM_USER0); \ | |
810191ff | 721 | return res; \ |
5f39d397 CM |
722 | } \ |
723 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
724 | u##bits val) \ | |
725 | { \ | |
df68b8a7 DM |
726 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
727 | p->member = cpu_to_le##bits(val); \ | |
728 | kunmap_atomic(p, KM_USER0); \ | |
5f39d397 | 729 | } |
9078a3e1 | 730 | |
5f39d397 CM |
731 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
732 | static inline u##bits btrfs_##name(type *s) \ | |
733 | { \ | |
734 | return le##bits##_to_cpu(s->member); \ | |
735 | } \ | |
736 | static inline void btrfs_set_##name(type *s, u##bits val) \ | |
737 | { \ | |
738 | s->member = cpu_to_le##bits(val); \ | |
1e1d2701 CM |
739 | } |
740 | ||
0b86a832 CM |
741 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
742 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); | |
743 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); | |
744 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); | |
745 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); | |
746 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); | |
747 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
748 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); |
749 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); | |
750 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); | |
0b86a832 | 751 | |
8a4b83cc CM |
752 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
753 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, | |
754 | total_bytes, 64); | |
755 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, | |
756 | bytes_used, 64); | |
757 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, | |
758 | io_align, 32); | |
759 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, | |
760 | io_width, 32); | |
761 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, | |
762 | sector_size, 32); | |
763 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
764 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, |
765 | dev_group, 32); | |
766 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, | |
767 | seek_speed, 8); | |
768 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, | |
769 | bandwidth, 8); | |
8a4b83cc | 770 | |
0b86a832 CM |
771 | static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) |
772 | { | |
773 | return (char *)d + offsetof(struct btrfs_dev_item, uuid); | |
774 | } | |
775 | ||
e17cade2 | 776 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
0b86a832 CM |
777 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
778 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); | |
779 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); | |
780 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); | |
781 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); | |
782 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); | |
783 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); | |
321aecc6 | 784 | BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); |
0b86a832 CM |
785 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
786 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); | |
787 | ||
e17cade2 CM |
788 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
789 | { | |
790 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); | |
791 | } | |
792 | ||
793 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); | |
0b86a832 CM |
794 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
795 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, | |
796 | stripe_len, 64); | |
797 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, | |
798 | io_align, 32); | |
799 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, | |
800 | io_width, 32); | |
801 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, | |
802 | sector_size, 32); | |
803 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); | |
804 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, | |
805 | num_stripes, 16); | |
321aecc6 CM |
806 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, |
807 | sub_stripes, 16); | |
0b86a832 CM |
808 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
809 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); | |
810 | ||
811 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, | |
812 | int nr) | |
813 | { | |
814 | unsigned long offset = (unsigned long)c; | |
815 | offset += offsetof(struct btrfs_chunk, stripe); | |
816 | offset += nr * sizeof(struct btrfs_stripe); | |
817 | return (struct btrfs_stripe *)offset; | |
818 | } | |
819 | ||
a443755f CM |
820 | static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) |
821 | { | |
822 | return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); | |
823 | } | |
824 | ||
0b86a832 CM |
825 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
826 | struct btrfs_chunk *c, int nr) | |
827 | { | |
828 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); | |
829 | } | |
830 | ||
831 | static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, | |
832 | struct btrfs_chunk *c, int nr, | |
833 | u64 val) | |
834 | { | |
835 | btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); | |
836 | } | |
837 | ||
838 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, | |
839 | struct btrfs_chunk *c, int nr) | |
840 | { | |
841 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); | |
842 | } | |
843 | ||
844 | static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, | |
845 | struct btrfs_chunk *c, int nr, | |
846 | u64 val) | |
847 | { | |
848 | btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); | |
849 | } | |
850 | ||
5f39d397 CM |
851 | /* struct btrfs_block_group_item */ |
852 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | |
853 | used, 64); | |
854 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | |
855 | used, 64); | |
0b86a832 CM |
856 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
857 | struct btrfs_block_group_item, chunk_objectid, 64); | |
e17cade2 CM |
858 | |
859 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, | |
0b86a832 CM |
860 | struct btrfs_block_group_item, chunk_objectid, 64); |
861 | BTRFS_SETGET_FUNCS(disk_block_group_flags, | |
862 | struct btrfs_block_group_item, flags, 64); | |
863 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, | |
864 | struct btrfs_block_group_item, flags, 64); | |
1e1d2701 | 865 | |
3954401f CM |
866 | /* struct btrfs_inode_ref */ |
867 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); | |
868 | ||
5f39d397 CM |
869 | /* struct btrfs_inode_item */ |
870 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | |
871 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); | |
872 | BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64); | |
873 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); | |
874 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | |
875 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | |
876 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | |
877 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | |
0b86a832 | 878 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
5f39d397 CM |
879 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16); |
880 | BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item, | |
881 | compat_flags, 16); | |
1e1d2701 | 882 | |
0b86a832 | 883 | static inline struct btrfs_timespec * |
5f39d397 | 884 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 885 | { |
5f39d397 CM |
886 | unsigned long ptr = (unsigned long)inode_item; |
887 | ptr += offsetof(struct btrfs_inode_item, atime); | |
0b86a832 | 888 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
889 | } |
890 | ||
0b86a832 | 891 | static inline struct btrfs_timespec * |
5f39d397 | 892 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 893 | { |
5f39d397 CM |
894 | unsigned long ptr = (unsigned long)inode_item; |
895 | ptr += offsetof(struct btrfs_inode_item, mtime); | |
0b86a832 | 896 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
897 | } |
898 | ||
0b86a832 | 899 | static inline struct btrfs_timespec * |
5f39d397 | 900 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 901 | { |
5f39d397 CM |
902 | unsigned long ptr = (unsigned long)inode_item; |
903 | ptr += offsetof(struct btrfs_inode_item, ctime); | |
0b86a832 | 904 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
905 | } |
906 | ||
0b86a832 | 907 | static inline struct btrfs_timespec * |
5f39d397 | 908 | btrfs_inode_otime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 909 | { |
5f39d397 CM |
910 | unsigned long ptr = (unsigned long)inode_item; |
911 | ptr += offsetof(struct btrfs_inode_item, otime); | |
0b86a832 | 912 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
913 | } |
914 | ||
0b86a832 CM |
915 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
916 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); | |
e20d96d6 | 917 | |
5f39d397 CM |
918 | /* struct btrfs_extent_item */ |
919 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32); | |
74493f7a | 920 | |
0b86a832 | 921 | /* struct btrfs_dev_extent */ |
e17cade2 CM |
922 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
923 | chunk_tree, 64); | |
924 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, | |
925 | chunk_objectid, 64); | |
926 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, | |
927 | chunk_offset, 64); | |
0b86a832 CM |
928 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
929 | ||
e17cade2 CM |
930 | static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
931 | { | |
932 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); | |
933 | return (u8 *)((unsigned long)dev + ptr); | |
934 | } | |
935 | ||
74493f7a CM |
936 | /* struct btrfs_extent_ref */ |
937 | BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64); | |
938 | BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64); | |
939 | BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64); | |
940 | BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64); | |
941 | ||
7bb86316 CM |
942 | BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64); |
943 | BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref, | |
74493f7a | 944 | generation, 64); |
7bb86316 CM |
945 | BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref, |
946 | objectid, 64); | |
947 | BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64); | |
e20d96d6 | 948 | |
5f39d397 CM |
949 | BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, |
950 | refs, 32); | |
e20d96d6 | 951 | |
5f39d397 CM |
952 | /* struct btrfs_node */ |
953 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | |
74493f7a | 954 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
e20d96d6 | 955 | |
5f39d397 | 956 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
cf27e1ee | 957 | { |
5f39d397 CM |
958 | unsigned long ptr; |
959 | ptr = offsetof(struct btrfs_node, ptrs) + | |
960 | sizeof(struct btrfs_key_ptr) * nr; | |
961 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | |
cf27e1ee CM |
962 | } |
963 | ||
5f39d397 CM |
964 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
965 | int nr, u64 val) | |
cf27e1ee | 966 | { |
5f39d397 CM |
967 | unsigned long ptr; |
968 | ptr = offsetof(struct btrfs_node, ptrs) + | |
969 | sizeof(struct btrfs_key_ptr) * nr; | |
970 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | |
cf27e1ee CM |
971 | } |
972 | ||
74493f7a CM |
973 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
974 | { | |
975 | unsigned long ptr; | |
976 | ptr = offsetof(struct btrfs_node, ptrs) + | |
977 | sizeof(struct btrfs_key_ptr) * nr; | |
978 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); | |
979 | } | |
980 | ||
981 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, | |
982 | int nr, u64 val) | |
983 | { | |
984 | unsigned long ptr; | |
985 | ptr = offsetof(struct btrfs_node, ptrs) + | |
986 | sizeof(struct btrfs_key_ptr) * nr; | |
987 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); | |
988 | } | |
989 | ||
810191ff | 990 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
4d775673 | 991 | { |
5f39d397 CM |
992 | return offsetof(struct btrfs_node, ptrs) + |
993 | sizeof(struct btrfs_key_ptr) * nr; | |
4d775673 CM |
994 | } |
995 | ||
e644d021 CM |
996 | void btrfs_node_key(struct extent_buffer *eb, |
997 | struct btrfs_disk_key *disk_key, int nr); | |
998 | ||
5f39d397 CM |
999 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
1000 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f8a0c | 1001 | { |
5f39d397 CM |
1002 | unsigned long ptr; |
1003 | ptr = btrfs_node_key_ptr_offset(nr); | |
1004 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
1005 | struct btrfs_key_ptr, key, disk_key); | |
1d4f8a0c CM |
1006 | } |
1007 | ||
5f39d397 CM |
1008 | /* struct btrfs_item */ |
1009 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | |
1010 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | |
4d775673 | 1011 | |
5f39d397 | 1012 | static inline unsigned long btrfs_item_nr_offset(int nr) |
1d4f8a0c | 1013 | { |
5f39d397 CM |
1014 | return offsetof(struct btrfs_leaf, items) + |
1015 | sizeof(struct btrfs_item) * nr; | |
1d4f8a0c CM |
1016 | } |
1017 | ||
5f39d397 CM |
1018 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
1019 | int nr) | |
0783fcfc | 1020 | { |
5f39d397 | 1021 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
0783fcfc CM |
1022 | } |
1023 | ||
5f39d397 CM |
1024 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
1025 | struct btrfs_item *item) | |
0783fcfc | 1026 | { |
5f39d397 | 1027 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
0783fcfc CM |
1028 | } |
1029 | ||
5f39d397 | 1030 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1031 | { |
5f39d397 | 1032 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1033 | } |
1034 | ||
5f39d397 | 1035 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1036 | { |
5f39d397 | 1037 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1038 | } |
1039 | ||
5f39d397 | 1040 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1041 | { |
5f39d397 | 1042 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1043 | } |
1044 | ||
5f39d397 CM |
1045 | static inline void btrfs_item_key(struct extent_buffer *eb, |
1046 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 1047 | { |
5f39d397 CM |
1048 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
1049 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
1050 | } |
1051 | ||
5f39d397 CM |
1052 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
1053 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 1054 | { |
5f39d397 CM |
1055 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
1056 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
1057 | } |
1058 | ||
5f39d397 | 1059 | /* struct btrfs_dir_item */ |
5103e947 | 1060 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
5f39d397 CM |
1061 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
1062 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | |
1d4f6404 | 1063 | |
5f39d397 CM |
1064 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
1065 | struct btrfs_dir_item *item, | |
1066 | struct btrfs_disk_key *key) | |
1d4f6404 | 1067 | { |
5f39d397 | 1068 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
1d4f6404 CM |
1069 | } |
1070 | ||
5f39d397 CM |
1071 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
1072 | struct btrfs_dir_item *item, | |
1073 | struct btrfs_disk_key *key) | |
a8a2ee0c | 1074 | { |
5f39d397 | 1075 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
a8a2ee0c CM |
1076 | } |
1077 | ||
5f39d397 CM |
1078 | /* struct btrfs_disk_key */ |
1079 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | |
1080 | objectid, 64); | |
1081 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | |
1082 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | |
1d4f6404 | 1083 | |
e2fa7227 CM |
1084 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
1085 | struct btrfs_disk_key *disk) | |
1086 | { | |
1087 | cpu->offset = le64_to_cpu(disk->offset); | |
5f39d397 | 1088 | cpu->type = disk->type; |
e2fa7227 CM |
1089 | cpu->objectid = le64_to_cpu(disk->objectid); |
1090 | } | |
1091 | ||
1092 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
1093 | struct btrfs_key *cpu) | |
1094 | { | |
1095 | disk->offset = cpu_to_le64(cpu->offset); | |
5f39d397 | 1096 | disk->type = cpu->type; |
e2fa7227 CM |
1097 | disk->objectid = cpu_to_le64(cpu->objectid); |
1098 | } | |
1099 | ||
5f39d397 CM |
1100 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
1101 | struct btrfs_key *key, int nr) | |
7f5c1516 | 1102 | { |
5f39d397 CM |
1103 | struct btrfs_disk_key disk_key; |
1104 | btrfs_node_key(eb, &disk_key, nr); | |
1105 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
1106 | } |
1107 | ||
5f39d397 CM |
1108 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
1109 | struct btrfs_key *key, int nr) | |
7f5c1516 | 1110 | { |
5f39d397 CM |
1111 | struct btrfs_disk_key disk_key; |
1112 | btrfs_item_key(eb, &disk_key, nr); | |
1113 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
1114 | } |
1115 | ||
5f39d397 CM |
1116 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
1117 | struct btrfs_dir_item *item, | |
1118 | struct btrfs_key *key) | |
4d775673 | 1119 | { |
5f39d397 CM |
1120 | struct btrfs_disk_key disk_key; |
1121 | btrfs_dir_item_key(eb, item, &disk_key); | |
1122 | btrfs_disk_key_to_cpu(key, &disk_key); | |
4d775673 CM |
1123 | } |
1124 | ||
58176a96 | 1125 | |
5f39d397 | 1126 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
3768f368 | 1127 | { |
5f39d397 | 1128 | return key->type; |
3768f368 CM |
1129 | } |
1130 | ||
5f39d397 | 1131 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
3768f368 | 1132 | { |
5f39d397 | 1133 | key->type = val; |
3768f368 CM |
1134 | } |
1135 | ||
5f39d397 | 1136 | /* struct btrfs_header */ |
db94535d | 1137 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
5f39d397 CM |
1138 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
1139 | generation, 64); | |
1140 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | |
1141 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | |
63b10fc4 | 1142 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
5f39d397 | 1143 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
0f7d52f4 | 1144 | |
63b10fc4 CM |
1145 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) |
1146 | { | |
1147 | return (btrfs_header_flags(eb) & flag) == flag; | |
1148 | } | |
1149 | ||
1150 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) | |
1151 | { | |
1152 | u64 flags = btrfs_header_flags(eb); | |
1153 | btrfs_set_header_flags(eb, flags | flag); | |
1154 | return (flags & flag) == flag; | |
1155 | } | |
1156 | ||
1157 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) | |
1158 | { | |
1159 | u64 flags = btrfs_header_flags(eb); | |
1160 | btrfs_set_header_flags(eb, flags & ~flag); | |
1161 | return (flags & flag) == flag; | |
1162 | } | |
1163 | ||
5f39d397 | 1164 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
0f7d52f4 | 1165 | { |
5f39d397 CM |
1166 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
1167 | return (u8 *)ptr; | |
0f7d52f4 CM |
1168 | } |
1169 | ||
e17cade2 CM |
1170 | static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) |
1171 | { | |
1172 | unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid); | |
1173 | return (u8 *)ptr; | |
1174 | } | |
1175 | ||
5f39d397 | 1176 | static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) |
3768f368 | 1177 | { |
5f39d397 CM |
1178 | unsigned long ptr = offsetof(struct btrfs_super_block, fsid); |
1179 | return (u8 *)ptr; | |
3768f368 CM |
1180 | } |
1181 | ||
5f39d397 | 1182 | static inline u8 *btrfs_header_csum(struct extent_buffer *eb) |
3768f368 | 1183 | { |
5f39d397 CM |
1184 | unsigned long ptr = offsetof(struct btrfs_header, csum); |
1185 | return (u8 *)ptr; | |
3768f368 CM |
1186 | } |
1187 | ||
5f39d397 | 1188 | static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) |
3768f368 | 1189 | { |
5f39d397 | 1190 | return NULL; |
3768f368 CM |
1191 | } |
1192 | ||
5f39d397 | 1193 | static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) |
3768f368 | 1194 | { |
5f39d397 | 1195 | return NULL; |
3768f368 CM |
1196 | } |
1197 | ||
5f39d397 | 1198 | static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) |
3768f368 | 1199 | { |
5f39d397 | 1200 | return NULL; |
3768f368 CM |
1201 | } |
1202 | ||
5f39d397 | 1203 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
3768f368 | 1204 | { |
5f39d397 | 1205 | return (btrfs_header_level(eb) == 0); |
3768f368 CM |
1206 | } |
1207 | ||
5f39d397 CM |
1208 | /* struct btrfs_root_item */ |
1209 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); | |
db94535d CM |
1210 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
1211 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); | |
3768f368 | 1212 | |
db94535d CM |
1213 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
1214 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); | |
5f39d397 CM |
1215 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
1216 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | |
1217 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32); | |
db94535d CM |
1218 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
1219 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); | |
123abc88 | 1220 | |
5f39d397 | 1221 | /* struct btrfs_super_block */ |
db94535d | 1222 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
a061fc8d | 1223 | BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); |
5f39d397 CM |
1224 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
1225 | generation, 64); | |
1226 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | |
0b86a832 CM |
1227 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
1228 | struct btrfs_super_block, sys_chunk_array_size, 32); | |
db94535d CM |
1229 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
1230 | root_level, 8); | |
0b86a832 CM |
1231 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
1232 | chunk_root, 64); | |
1233 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, | |
1234 | chunk_root_level, 64); | |
db94535d CM |
1235 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
1236 | total_bytes, 64); | |
1237 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, | |
1238 | bytes_used, 64); | |
5f39d397 CM |
1239 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
1240 | sectorsize, 32); | |
1241 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | |
1242 | nodesize, 32); | |
1243 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, | |
1244 | leafsize, 32); | |
87ee04eb CM |
1245 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
1246 | stripesize, 32); | |
5f39d397 CM |
1247 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
1248 | root_dir_objectid, 64); | |
8a4b83cc CM |
1249 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
1250 | num_devices, 64); | |
2e635a27 | 1251 | |
5f39d397 | 1252 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
2e635a27 | 1253 | { |
5f39d397 | 1254 | return offsetof(struct btrfs_leaf, items); |
2e635a27 CM |
1255 | } |
1256 | ||
5f39d397 CM |
1257 | /* struct btrfs_file_extent_item */ |
1258 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | |
9f5fae2f | 1259 | |
5f39d397 | 1260 | static inline unsigned long btrfs_file_extent_inline_start(struct |
236454df CM |
1261 | btrfs_file_extent_item *e) |
1262 | { | |
5f39d397 | 1263 | unsigned long offset = (unsigned long)e; |
db94535d | 1264 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 1265 | return offset; |
236454df CM |
1266 | } |
1267 | ||
1268 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
1269 | { | |
db94535d | 1270 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
9f5fae2f CM |
1271 | } |
1272 | ||
5f39d397 CM |
1273 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, |
1274 | struct btrfs_item *e) | |
9f5fae2f | 1275 | { |
5f39d397 | 1276 | unsigned long offset; |
db94535d | 1277 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 1278 | return btrfs_item_size(eb, e) - offset; |
9f5fae2f CM |
1279 | } |
1280 | ||
db94535d CM |
1281 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
1282 | disk_bytenr, 64); | |
5f39d397 CM |
1283 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
1284 | generation, 64); | |
db94535d CM |
1285 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
1286 | disk_num_bytes, 64); | |
5f39d397 CM |
1287 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
1288 | offset, 64); | |
db94535d CM |
1289 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
1290 | num_bytes, 64); | |
9f5fae2f | 1291 | |
e20d96d6 CM |
1292 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
1293 | { | |
1294 | return sb->s_fs_info; | |
1295 | } | |
1296 | ||
58176a96 JB |
1297 | static inline int btrfs_set_root_name(struct btrfs_root *root, |
1298 | const char *name, int len) | |
1299 | { | |
1300 | /* if we already have a name just free it */ | |
1301 | if (root->name) | |
1302 | kfree(root->name); | |
1303 | ||
1304 | root->name = kmalloc(len+1, GFP_KERNEL); | |
1305 | if (!root->name) | |
1306 | return -ENOMEM; | |
1307 | ||
1308 | memcpy(root->name, name, len); | |
1309 | root->name[len] ='\0'; | |
1310 | ||
1311 | return 0; | |
1312 | } | |
1313 | ||
db94535d CM |
1314 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) { |
1315 | if (level == 0) | |
1316 | return root->leafsize; | |
1317 | return root->nodesize; | |
1318 | } | |
1319 | ||
4beb1b8b CM |
1320 | /* helper function to cast into the data area of the leaf. */ |
1321 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 | 1322 | ((type *)(btrfs_leaf_data(leaf) + \ |
5f39d397 CM |
1323 | btrfs_item_offset_nr(leaf, slot))) |
1324 | ||
1325 | #define btrfs_item_ptr_offset(leaf, slot) \ | |
1326 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | |
1327 | btrfs_item_offset_nr(leaf, slot))) | |
4beb1b8b | 1328 | |
6da6abae CM |
1329 | static inline struct dentry *fdentry(struct file *file) { |
1330 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) | |
1331 | return file->f_dentry; | |
1332 | #else | |
1333 | return file->f_path.dentry; | |
1334 | #endif | |
1335 | } | |
1336 | ||
b18c6685 | 1337 | /* extent-tree.c */ |
be20aa9d CM |
1338 | u32 btrfs_count_snapshots_in_path(struct btrfs_root *root, |
1339 | struct btrfs_path *count_path, | |
a68d5933 | 1340 | u64 expected_owner, u64 first_extent); |
e9d0b13b CM |
1341 | int btrfs_extent_post_op(struct btrfs_trans_handle *trans, |
1342 | struct btrfs_root *root); | |
d1310b2e | 1343 | int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy); |
5276aeda CM |
1344 | struct btrfs_block_group_cache *btrfs_lookup_block_group(struct |
1345 | btrfs_fs_info *info, | |
db94535d | 1346 | u64 bytenr); |
31f3c99b CM |
1347 | struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root, |
1348 | struct btrfs_block_group_cache | |
be744175 | 1349 | *hint, u64 search_start, |
de428b63 | 1350 | int data, int owner); |
c5739bba | 1351 | int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, |
7bb86316 | 1352 | struct btrfs_root *root, u64 owner_objectid); |
5f39d397 | 1353 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
db94535d | 1354 | struct btrfs_root *root, u32 size, |
7bb86316 | 1355 | u64 root_objectid, |
db94535d | 1356 | u64 hint, u64 empty_size); |
7bb86316 CM |
1357 | struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
1358 | struct btrfs_root *root, | |
1359 | u32 blocksize, | |
1360 | u64 root_objectid, | |
1361 | u64 ref_generation, | |
1362 | u64 first_objectid, | |
1363 | int level, | |
1364 | u64 hint, | |
1365 | u64 empty_size); | |
edbd8d4e CM |
1366 | int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans, |
1367 | struct btrfs_root *root, u64 new_size); | |
1368 | int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size); | |
7bb86316 CM |
1369 | int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans, |
1370 | struct btrfs_root *root, | |
1371 | struct btrfs_path *path, u64 bytenr, | |
1372 | u64 root_objectid, u64 ref_generation, | |
1373 | u64 owner, u64 owner_offset); | |
4d775673 | 1374 | int btrfs_alloc_extent(struct btrfs_trans_handle *trans, |
7bb86316 | 1375 | struct btrfs_root *root, |
98d20f67 CM |
1376 | u64 num_bytes, u64 min_bytes, |
1377 | u64 root_objectid, u64 ref_generation, | |
7bb86316 CM |
1378 | u64 owner, u64 owner_offset, |
1379 | u64 empty_size, u64 hint_byte, | |
ec44a35c | 1380 | u64 search_end, struct btrfs_key *ins, u64 data); |
e089f05c | 1381 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
5f39d397 | 1382 | struct extent_buffer *buf); |
e089f05c | 1383 | int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
7bb86316 CM |
1384 | *root, u64 bytenr, u64 num_bytes, |
1385 | u64 root_objectid, u64 ref_generation, | |
1386 | u64 owner_objectid, u64 owner_offset, int pin); | |
ccd467d6 CM |
1387 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
1388 | struct btrfs_root *root, | |
d1310b2e | 1389 | struct extent_io_tree *unpin); |
b18c6685 CM |
1390 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
1391 | struct btrfs_root *root, | |
7bb86316 CM |
1392 | u64 bytenr, u64 num_bytes, |
1393 | u64 root_objectid, u64 ref_generation, | |
1394 | u64 owner, u64 owner_offset); | |
9078a3e1 CM |
1395 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
1396 | struct btrfs_root *root); | |
1397 | int btrfs_free_block_groups(struct btrfs_fs_info *info); | |
1398 | int btrfs_read_block_groups(struct btrfs_root *root); | |
0b86a832 CM |
1399 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
1400 | struct btrfs_root *root, u64 bytes_used, | |
e17cade2 | 1401 | u64 type, u64 chunk_objectid, u64 chunk_offset, |
0b86a832 | 1402 | u64 size); |
dee26a9f | 1403 | /* ctree.c */ |
0b86a832 CM |
1404 | int btrfs_previous_item(struct btrfs_root *root, |
1405 | struct btrfs_path *path, u64 min_objectid, | |
1406 | int type); | |
5f39d397 CM |
1407 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
1408 | struct btrfs_root *root, struct extent_buffer *buf, | |
1409 | struct extent_buffer *parent, int parent_slot, | |
1410 | struct extent_buffer **cow_ret); | |
be20aa9d CM |
1411 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
1412 | struct btrfs_root *root, | |
1413 | struct extent_buffer *buf, | |
1414 | struct extent_buffer **cow_ret, u64 new_root_objectid); | |
6567e837 CM |
1415 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
1416 | *root, struct btrfs_path *path, u32 data_size); | |
b18c6685 CM |
1417 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
1418 | struct btrfs_root *root, | |
1419 | struct btrfs_path *path, | |
179e29e4 | 1420 | u32 new_size, int from_end); |
e089f05c CM |
1421 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
1422 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
1423 | ins_len, int cow); | |
6702ed49 | 1424 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
5f39d397 | 1425 | struct btrfs_root *root, struct extent_buffer *parent, |
a6b6e75e CM |
1426 | int start_slot, int cache_only, u64 *last_ret, |
1427 | struct btrfs_key *progress); | |
234b63a0 | 1428 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
2c90e5d6 CM |
1429 | struct btrfs_path *btrfs_alloc_path(void); |
1430 | void btrfs_free_path(struct btrfs_path *p); | |
234b63a0 | 1431 | void btrfs_init_path(struct btrfs_path *p); |
85e21bac CM |
1432 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
1433 | struct btrfs_path *path, int slot, int nr); | |
1434 | ||
1435 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, | |
1436 | struct btrfs_root *root, | |
1437 | struct btrfs_path *path) | |
1438 | { | |
1439 | return btrfs_del_items(trans, root, path, path->slots[0], 1); | |
1440 | } | |
1441 | ||
e089f05c CM |
1442 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
1443 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
9c58309d CM |
1444 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
1445 | struct btrfs_root *root, | |
1446 | struct btrfs_path *path, | |
1447 | struct btrfs_key *cpu_key, u32 *data_size, int nr); | |
1448 | ||
1449 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, | |
1450 | struct btrfs_root *root, | |
1451 | struct btrfs_path *path, | |
1452 | struct btrfs_key *key, | |
1453 | u32 data_size) | |
1454 | { | |
1455 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); | |
1456 | } | |
1457 | ||
234b63a0 | 1458 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
7bb86316 | 1459 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
5f39d397 | 1460 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
e089f05c | 1461 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
9f3a7427 | 1462 | *root); |
dee26a9f | 1463 | /* root-item.c */ |
e089f05c CM |
1464 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
1465 | struct btrfs_key *key); | |
1466 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
1467 | *root, struct btrfs_key *key, struct btrfs_root_item | |
1468 | *item); | |
1469 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
1470 | *root, struct btrfs_key *key, struct btrfs_root_item | |
1471 | *item); | |
1472 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct | |
1473 | btrfs_root_item *item, struct btrfs_key *key); | |
bf4ef679 CM |
1474 | int btrfs_search_root(struct btrfs_root *root, u64 search_start, |
1475 | u64 *found_objectid); | |
5ce14bbc CM |
1476 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid, |
1477 | struct btrfs_root *latest_root); | |
dee26a9f | 1478 | /* dir-item.c */ |
e089f05c | 1479 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
1480 | *root, const char *name, int name_len, u64 dir, |
1481 | struct btrfs_key *location, u8 type); | |
7e38180e CM |
1482 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
1483 | struct btrfs_root *root, | |
1484 | struct btrfs_path *path, u64 dir, | |
1485 | const char *name, int name_len, | |
1486 | int mod); | |
1487 | struct btrfs_dir_item * | |
1488 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | |
1489 | struct btrfs_root *root, | |
1490 | struct btrfs_path *path, u64 dir, | |
1491 | u64 objectid, const char *name, int name_len, | |
1492 | int mod); | |
1493 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, | |
1494 | struct btrfs_path *path, | |
7f5c1516 | 1495 | const char *name, int name_len); |
7e38180e CM |
1496 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
1497 | struct btrfs_root *root, | |
1498 | struct btrfs_path *path, | |
1499 | struct btrfs_dir_item *di); | |
5103e947 JB |
1500 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
1501 | struct btrfs_root *root, const char *name, | |
1502 | u16 name_len, const void *data, u16 data_len, | |
1503 | u64 dir); | |
1504 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, | |
1505 | struct btrfs_root *root, | |
1506 | struct btrfs_path *path, u64 dir, | |
1507 | const char *name, u16 name_len, | |
1508 | int mod); | |
dee26a9f | 1509 | /* inode-map.c */ |
9f5fae2f CM |
1510 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
1511 | struct btrfs_root *fs_root, | |
1512 | u64 dirid, u64 *objectid); | |
5be6f7f1 CM |
1513 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
1514 | ||
dee26a9f | 1515 | /* inode-item.c */ |
3954401f CM |
1516 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
1517 | struct btrfs_root *root, | |
1518 | const char *name, int name_len, | |
1519 | u64 inode_objectid, u64 ref_objectid); | |
1520 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, | |
1521 | struct btrfs_root *root, | |
1522 | const char *name, int name_len, | |
1523 | u64 inode_objectid, u64 ref_objectid); | |
5f39d397 CM |
1524 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
1525 | struct btrfs_root *root, | |
1526 | struct btrfs_path *path, u64 objectid); | |
293ffd5f | 1527 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
1528 | *root, struct btrfs_path *path, |
1529 | struct btrfs_key *location, int mod); | |
dee26a9f CM |
1530 | |
1531 | /* file-item.c */ | |
b18c6685 | 1532 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
dee26a9f | 1533 | struct btrfs_root *root, |
f2eb0a24 | 1534 | u64 objectid, u64 pos, u64 disk_offset, |
db94535d | 1535 | u64 disk_num_bytes, |
f2eb0a24 | 1536 | u64 num_bytes, u64 offset); |
dee26a9f CM |
1537 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
1538 | struct btrfs_root *root, | |
1539 | struct btrfs_path *path, u64 objectid, | |
db94535d | 1540 | u64 bytenr, int mod); |
065631f6 CM |
1541 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
1542 | struct btrfs_root *root, struct inode *inode, | |
e015640f CM |
1543 | struct bio *bio, char *sums); |
1544 | int btrfs_csum_one_bio(struct btrfs_root *root, | |
1545 | struct bio *bio, char **sums_ret); | |
b18c6685 CM |
1546 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
1547 | struct btrfs_root *root, | |
1548 | struct btrfs_path *path, | |
1549 | u64 objectid, u64 offset, | |
1550 | int cow); | |
1de037a4 CM |
1551 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
1552 | struct btrfs_root *root, struct btrfs_path *path, | |
1553 | u64 isize); | |
39279cc3 | 1554 | /* inode.c */ |
3b96362c SW |
1555 | void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name, |
1556 | int namelen); | |
1557 | ||
239b14b3 CM |
1558 | int btrfs_merge_bio_hook(struct page *page, unsigned long offset, |
1559 | size_t size, struct bio *bio); | |
1560 | ||
9069218d CM |
1561 | static inline void dec_i_blocks(struct inode *inode, u64 dec) |
1562 | { | |
1563 | dec = dec >> 9; | |
1564 | if (dec <= inode->i_blocks) | |
1565 | inode->i_blocks -= dec; | |
1566 | else | |
1567 | inode->i_blocks = 0; | |
1568 | } | |
1569 | ||
edbd8d4e CM |
1570 | unsigned long btrfs_force_ra(struct address_space *mapping, |
1571 | struct file_ra_state *ra, struct file *file, | |
1572 | pgoff_t offset, pgoff_t last_index); | |
1832a6d5 CM |
1573 | int btrfs_check_free_space(struct btrfs_root *root, u64 num_required, |
1574 | int for_del); | |
9ebefb18 CM |
1575 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page); |
1576 | int btrfs_readpage(struct file *file, struct page *page); | |
39279cc3 | 1577 | void btrfs_delete_inode(struct inode *inode); |
2da98f00 | 1578 | void btrfs_put_inode(struct inode *inode); |
39279cc3 CM |
1579 | void btrfs_read_locked_inode(struct inode *inode); |
1580 | int btrfs_write_inode(struct inode *inode, int wait); | |
1581 | void btrfs_dirty_inode(struct inode *inode); | |
1582 | struct inode *btrfs_alloc_inode(struct super_block *sb); | |
1583 | void btrfs_destroy_inode(struct inode *inode); | |
1584 | int btrfs_init_cachep(void); | |
1585 | void btrfs_destroy_cachep(void); | |
6bf13c0c | 1586 | long btrfs_ioctl_trans_end(struct file *file); |
34287aa3 | 1587 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
39279cc3 CM |
1588 | struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid, |
1589 | struct btrfs_root *root); | |
dc17ff8f CM |
1590 | struct inode *btrfs_ilookup(struct super_block *s, u64 objectid, |
1591 | u64 root_objectid); | |
39279cc3 CM |
1592 | int btrfs_commit_write(struct file *file, struct page *page, |
1593 | unsigned from, unsigned to); | |
a52d9a80 CM |
1594 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
1595 | size_t page_offset, u64 start, u64 end, | |
1596 | int create); | |
1597 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
1598 | struct btrfs_root *root, | |
1599 | struct inode *inode); | |
39279cc3 | 1600 | /* file.c */ |
a52d9a80 | 1601 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end); |
5f56406a | 1602 | int btrfs_check_file(struct btrfs_root *root, struct inode *inode); |
39279cc3 CM |
1603 | extern struct file_operations btrfs_file_operations; |
1604 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, | |
1605 | struct btrfs_root *root, struct inode *inode, | |
00f5c795 | 1606 | u64 start, u64 end, u64 inline_limit, u64 *hint_block); |
6bf13c0c SW |
1607 | int btrfs_release_file(struct inode *inode, struct file *file); |
1608 | ||
6702ed49 CM |
1609 | /* tree-defrag.c */ |
1610 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | |
1611 | struct btrfs_root *root, int cache_only); | |
58176a96 JB |
1612 | |
1613 | /* sysfs.c */ | |
1614 | int btrfs_init_sysfs(void); | |
1615 | void btrfs_exit_sysfs(void); | |
1616 | int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); | |
1617 | int btrfs_sysfs_add_root(struct btrfs_root *root); | |
1618 | void btrfs_sysfs_del_root(struct btrfs_root *root); | |
1619 | void btrfs_sysfs_del_super(struct btrfs_fs_info *root); | |
1620 | ||
5103e947 JB |
1621 | /* xattr.c */ |
1622 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
1623 | int btrfs_delete_xattrs(struct btrfs_trans_handle *trans, | |
1624 | struct btrfs_root *root, struct inode *inode); | |
edbd8d4e CM |
1625 | /* super.c */ |
1626 | u64 btrfs_parse_size(char *str); | |
edf24abe | 1627 | int btrfs_parse_options(struct btrfs_root *root, char *options); |
6bf13c0c | 1628 | int btrfs_sync_fs(struct super_block *sb, int wait); |
eb60ceac | 1629 | #endif |