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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" |
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 |
3768f368 | 73 | |
0b86a832 CM |
74 | |
75 | /* | |
76 | * the device items go into the chunk tree. The key is in the form | |
77 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] | |
78 | */ | |
79 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL | |
80 | ||
e20d96d6 CM |
81 | /* |
82 | * we can actually store much bigger names, but lets not confuse the rest | |
83 | * of linux | |
84 | */ | |
85 | #define BTRFS_NAME_LEN 255 | |
86 | ||
f254e52c CM |
87 | /* 32 bytes in various csum fields */ |
88 | #define BTRFS_CSUM_SIZE 32 | |
509659cd CM |
89 | /* four bytes for CRC32 */ |
90 | #define BTRFS_CRC32_SIZE 4 | |
3954401f | 91 | #define BTRFS_EMPTY_DIR_SIZE 0 |
f254e52c | 92 | |
fabb5681 CM |
93 | #define BTRFS_FT_UNKNOWN 0 |
94 | #define BTRFS_FT_REG_FILE 1 | |
95 | #define BTRFS_FT_DIR 2 | |
96 | #define BTRFS_FT_CHRDEV 3 | |
97 | #define BTRFS_FT_BLKDEV 4 | |
98 | #define BTRFS_FT_FIFO 5 | |
99 | #define BTRFS_FT_SOCK 6 | |
100 | #define BTRFS_FT_SYMLINK 7 | |
5103e947 JB |
101 | #define BTRFS_FT_XATTR 8 |
102 | #define BTRFS_FT_MAX 9 | |
fabb5681 | 103 | |
fec577fb CM |
104 | /* |
105 | * the key defines the order in the tree, and so it also defines (optimal) | |
106 | * block layout. objectid corresonds to the inode number. The flags | |
107 | * tells us things about the object, and is a kind of stream selector. | |
108 | * so for a given inode, keys with flags of 1 might refer to the inode | |
109 | * data, flags of 2 may point to file data in the btree and flags == 3 | |
110 | * may point to extents. | |
111 | * | |
112 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
113 | * |
114 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
115 | * in cpu native order. Otherwise they are identical and their sizes | |
116 | * should be the same (ie both packed) | |
fec577fb | 117 | */ |
e2fa7227 CM |
118 | struct btrfs_disk_key { |
119 | __le64 objectid; | |
5f39d397 | 120 | u8 type; |
70b2befd | 121 | __le64 offset; |
e2fa7227 CM |
122 | } __attribute__ ((__packed__)); |
123 | ||
124 | struct btrfs_key { | |
eb60ceac | 125 | u64 objectid; |
5f39d397 | 126 | u8 type; |
70b2befd | 127 | u64 offset; |
eb60ceac CM |
128 | } __attribute__ ((__packed__)); |
129 | ||
0b86a832 CM |
130 | struct btrfs_mapping_tree { |
131 | struct extent_map_tree map_tree; | |
132 | }; | |
133 | ||
134 | #define BTRFS_DEV_UUID_SIZE 16 | |
135 | struct btrfs_dev_item { | |
136 | /* the internal btrfs device id */ | |
137 | __le64 devid; | |
138 | ||
139 | /* size of the device */ | |
140 | __le64 total_bytes; | |
141 | ||
142 | /* bytes used */ | |
143 | __le64 bytes_used; | |
144 | ||
145 | /* optimal io alignment for this device */ | |
146 | __le32 io_align; | |
147 | ||
148 | /* optimal io width for this device */ | |
149 | __le32 io_width; | |
150 | ||
151 | /* minimal io size for this device */ | |
152 | __le32 sector_size; | |
153 | ||
0b86a832 CM |
154 | /* type and info about this device */ |
155 | __le64 type; | |
156 | ||
0d81ba5d | 157 | /* btrfs generated uuid for this device */ |
0b86a832 | 158 | u8 uuid[BTRFS_DEV_UUID_SIZE]; |
0b86a832 CM |
159 | } __attribute__ ((__packed__)); |
160 | ||
161 | struct btrfs_stripe { | |
162 | __le64 devid; | |
163 | __le64 offset; | |
164 | } __attribute__ ((__packed__)); | |
165 | ||
166 | struct btrfs_chunk { | |
167 | __le64 owner; | |
168 | __le64 stripe_len; | |
169 | __le64 type; | |
170 | ||
171 | /* optimal io alignment for this chunk */ | |
172 | __le32 io_align; | |
173 | ||
174 | /* optimal io width for this chunk */ | |
175 | __le32 io_width; | |
176 | ||
177 | /* minimal io size for this chunk */ | |
178 | __le32 sector_size; | |
179 | ||
180 | /* 2^16 stripes is quite a lot, a second limit is the size of a single | |
181 | * item in the btree | |
182 | */ | |
183 | __le16 num_stripes; | |
184 | struct btrfs_stripe stripe; | |
185 | /* additional stripes go here */ | |
186 | } __attribute__ ((__packed__)); | |
187 | ||
188 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) | |
189 | { | |
190 | BUG_ON(num_stripes == 0); | |
191 | return sizeof(struct btrfs_chunk) + | |
192 | sizeof(struct btrfs_stripe) * (num_stripes - 1); | |
193 | } | |
194 | ||
5f39d397 | 195 | #define BTRFS_FSID_SIZE 16 |
fec577fb CM |
196 | /* |
197 | * every tree block (leaf or node) starts with this header. | |
198 | */ | |
bb492bb0 | 199 | struct btrfs_header { |
f254e52c | 200 | u8 csum[BTRFS_CSUM_SIZE]; |
5f39d397 | 201 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 202 | __le64 bytenr; /* which block this node is supposed to live in */ |
7f5c1516 | 203 | __le64 generation; |
4d775673 | 204 | __le64 owner; |
5f39d397 | 205 | __le32 nritems; |
bb492bb0 | 206 | __le16 flags; |
9a6f11ed | 207 | u8 level; |
eb60ceac CM |
208 | } __attribute__ ((__packed__)); |
209 | ||
5f39d397 | 210 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
123abc88 | 211 | sizeof(struct btrfs_header)) / \ |
74493f7a | 212 | sizeof(struct btrfs_key_ptr)) |
123abc88 | 213 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
5f39d397 | 214 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
236454df CM |
215 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
216 | sizeof(struct btrfs_item) - \ | |
217 | sizeof(struct btrfs_file_extent_item)) | |
eb60ceac | 218 | |
0b86a832 CM |
219 | |
220 | /* | |
221 | * this is a very generous portion of the super block, giving us | |
222 | * room to translate 14 chunks with 3 stripes each. | |
223 | */ | |
224 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 | |
225 | ||
fec577fb CM |
226 | /* |
227 | * the super block basically lists the main trees of the FS | |
228 | * it currently lacks any block count etc etc | |
229 | */ | |
234b63a0 | 230 | struct btrfs_super_block { |
f254e52c | 231 | u8 csum[BTRFS_CSUM_SIZE]; |
87cbda5c | 232 | /* the first 3 fields must match struct btrfs_header */ |
3768f368 | 233 | u8 fsid[16]; /* FS specific uuid */ |
db94535d | 234 | __le64 bytenr; /* this block number */ |
3768f368 | 235 | __le64 magic; |
3768f368 CM |
236 | __le64 generation; |
237 | __le64 root; | |
0b86a832 | 238 | __le64 chunk_root; |
db94535d CM |
239 | __le64 total_bytes; |
240 | __le64 bytes_used; | |
2e635a27 | 241 | __le64 root_dir_objectid; |
8a4b83cc | 242 | __le64 num_devices; |
5f39d397 CM |
243 | __le32 sectorsize; |
244 | __le32 nodesize; | |
245 | __le32 leafsize; | |
87ee04eb | 246 | __le32 stripesize; |
0b86a832 | 247 | __le32 sys_chunk_array_size; |
db94535d | 248 | u8 root_level; |
0b86a832 | 249 | u8 chunk_root_level; |
0d81ba5d | 250 | struct btrfs_dev_item dev_item; |
0b86a832 | 251 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
cfaa7295 CM |
252 | } __attribute__ ((__packed__)); |
253 | ||
fec577fb | 254 | /* |
62e2749e | 255 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
256 | * the item in the leaf (relative to the start of the data area) |
257 | */ | |
0783fcfc | 258 | struct btrfs_item { |
e2fa7227 | 259 | struct btrfs_disk_key key; |
123abc88 | 260 | __le32 offset; |
5f39d397 | 261 | __le32 size; |
eb60ceac CM |
262 | } __attribute__ ((__packed__)); |
263 | ||
fec577fb CM |
264 | /* |
265 | * leaves have an item area and a data area: | |
266 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
267 | * | |
268 | * The data is separate from the items to get the keys closer together | |
269 | * during searches. | |
270 | */ | |
234b63a0 | 271 | struct btrfs_leaf { |
bb492bb0 | 272 | struct btrfs_header header; |
123abc88 | 273 | struct btrfs_item items[]; |
eb60ceac CM |
274 | } __attribute__ ((__packed__)); |
275 | ||
fec577fb CM |
276 | /* |
277 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
278 | * other blocks | |
279 | */ | |
123abc88 CM |
280 | struct btrfs_key_ptr { |
281 | struct btrfs_disk_key key; | |
282 | __le64 blockptr; | |
74493f7a | 283 | __le64 generation; |
123abc88 CM |
284 | } __attribute__ ((__packed__)); |
285 | ||
234b63a0 | 286 | struct btrfs_node { |
bb492bb0 | 287 | struct btrfs_header header; |
123abc88 | 288 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
289 | } __attribute__ ((__packed__)); |
290 | ||
fec577fb | 291 | /* |
234b63a0 CM |
292 | * btrfs_paths remember the path taken from the root down to the leaf. |
293 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
294 | * to any other levels that are present. |
295 | * | |
296 | * The slots array records the index of the item or block pointer | |
297 | * used while walking the tree. | |
298 | */ | |
234b63a0 | 299 | struct btrfs_path { |
5f39d397 | 300 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
234b63a0 | 301 | int slots[BTRFS_MAX_LEVEL]; |
3c69faec | 302 | int reada; |
6702ed49 | 303 | int lowest_level; |
eb60ceac | 304 | }; |
5de08d7d | 305 | |
62e2749e CM |
306 | /* |
307 | * items in the extent btree are used to record the objectid of the | |
308 | * owner of the block and the number of references | |
309 | */ | |
310 | struct btrfs_extent_item { | |
311 | __le32 refs; | |
74493f7a CM |
312 | } __attribute__ ((__packed__)); |
313 | ||
314 | struct btrfs_extent_ref { | |
315 | __le64 root; | |
316 | __le64 generation; | |
317 | __le64 objectid; | |
318 | __le64 offset; | |
62e2749e CM |
319 | } __attribute__ ((__packed__)); |
320 | ||
0b86a832 CM |
321 | /* dev extents record free space on individual devices. The owner |
322 | * field points back to the chunk allocation mapping tree that allocated | |
323 | * the extent | |
324 | */ | |
325 | struct btrfs_dev_extent { | |
326 | __le64 owner; | |
327 | __le64 length; | |
328 | } __attribute__ ((__packed__)); | |
329 | ||
330 | ||
3954401f CM |
331 | struct btrfs_inode_ref { |
332 | __le16 name_len; | |
333 | /* name goes here */ | |
334 | } __attribute__ ((__packed__)); | |
335 | ||
0b86a832 | 336 | struct btrfs_timespec { |
f254e52c | 337 | __le64 sec; |
1e1d2701 CM |
338 | __le32 nsec; |
339 | } __attribute__ ((__packed__)); | |
340 | ||
341 | /* | |
342 | * there is no padding here on purpose. If you want to extent the inode, | |
343 | * make a new item type | |
344 | */ | |
345 | struct btrfs_inode_item { | |
346 | __le64 generation; | |
347 | __le64 size; | |
348 | __le64 nblocks; | |
31f3c99b | 349 | __le64 block_group; |
1e1d2701 CM |
350 | __le32 nlink; |
351 | __le32 uid; | |
352 | __le32 gid; | |
353 | __le32 mode; | |
0b86a832 | 354 | __le64 rdev; |
1e1d2701 CM |
355 | __le16 flags; |
356 | __le16 compat_flags; | |
0b86a832 CM |
357 | struct btrfs_timespec atime; |
358 | struct btrfs_timespec ctime; | |
359 | struct btrfs_timespec mtime; | |
360 | struct btrfs_timespec otime; | |
1e1d2701 CM |
361 | } __attribute__ ((__packed__)); |
362 | ||
62e2749e | 363 | struct btrfs_dir_item { |
d6e4a428 | 364 | struct btrfs_disk_key location; |
5103e947 | 365 | __le16 data_len; |
a8a2ee0c | 366 | __le16 name_len; |
62e2749e CM |
367 | u8 type; |
368 | } __attribute__ ((__packed__)); | |
369 | ||
370 | struct btrfs_root_item { | |
d6e4a428 CM |
371 | struct btrfs_inode_item inode; |
372 | __le64 root_dirid; | |
db94535d CM |
373 | __le64 bytenr; |
374 | __le64 byte_limit; | |
375 | __le64 bytes_used; | |
5eda7b5e | 376 | __le32 flags; |
62e2749e | 377 | __le32 refs; |
5eda7b5e CM |
378 | struct btrfs_disk_key drop_progress; |
379 | u8 drop_level; | |
db94535d | 380 | u8 level; |
9f5fae2f | 381 | } __attribute__ ((__packed__)); |
62e2749e | 382 | |
236454df CM |
383 | #define BTRFS_FILE_EXTENT_REG 0 |
384 | #define BTRFS_FILE_EXTENT_INLINE 1 | |
385 | ||
9f5fae2f | 386 | struct btrfs_file_extent_item { |
71951f35 | 387 | __le64 generation; |
236454df | 388 | u8 type; |
9f5fae2f CM |
389 | /* |
390 | * disk space consumed by the extent, checksum blocks are included | |
391 | * in these numbers | |
392 | */ | |
db94535d CM |
393 | __le64 disk_bytenr; |
394 | __le64 disk_num_bytes; | |
9f5fae2f | 395 | /* |
dee26a9f | 396 | * the logical offset in file blocks (no csums) |
9f5fae2f CM |
397 | * this extent record is for. This allows a file extent to point |
398 | * into the middle of an existing extent on disk, sharing it | |
399 | * between two snapshots (useful if some bytes in the middle of the | |
400 | * extent have changed | |
401 | */ | |
402 | __le64 offset; | |
403 | /* | |
404 | * the logical number of file blocks (no csums included) | |
405 | */ | |
db94535d | 406 | __le64 num_bytes; |
9f5fae2f CM |
407 | } __attribute__ ((__packed__)); |
408 | ||
f254e52c | 409 | struct btrfs_csum_item { |
509659cd | 410 | u8 csum; |
f254e52c CM |
411 | } __attribute__ ((__packed__)); |
412 | ||
0b86a832 CM |
413 | /* different types of block groups (and chunks) */ |
414 | #define BTRFS_BLOCK_GROUP_DATA (1 << 0) | |
415 | #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1) | |
416 | #define BTRFS_BLOCK_GROUP_METADATA (1 << 2) | |
593060d7 | 417 | #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3) |
1e2677e0 | 418 | |
f84a8b36 | 419 | |
9078a3e1 CM |
420 | struct btrfs_block_group_item { |
421 | __le64 used; | |
0b86a832 CM |
422 | __le64 chunk_tree; |
423 | __le64 chunk_objectid; | |
424 | __le64 flags; | |
9078a3e1 CM |
425 | } __attribute__ ((__packed__)); |
426 | ||
6324fbf3 CM |
427 | struct btrfs_space_info { |
428 | u64 flags; | |
429 | u64 total_bytes; | |
430 | u64 bytes_used; | |
431 | u64 bytes_pinned; | |
432 | int full; | |
433 | struct list_head list; | |
434 | }; | |
435 | ||
9078a3e1 CM |
436 | struct btrfs_block_group_cache { |
437 | struct btrfs_key key; | |
438 | struct btrfs_block_group_item item; | |
6324fbf3 | 439 | struct btrfs_space_info *space_info; |
324ae4df | 440 | u64 pinned; |
0b86a832 CM |
441 | u64 flags; |
442 | int cached; | |
9078a3e1 | 443 | }; |
0b86a832 CM |
444 | |
445 | struct btrfs_device; | |
8a4b83cc | 446 | struct btrfs_fs_devices; |
9f5fae2f | 447 | struct btrfs_fs_info { |
5f39d397 | 448 | u8 fsid[BTRFS_FSID_SIZE]; |
62e2749e CM |
449 | struct btrfs_root *extent_root; |
450 | struct btrfs_root *tree_root; | |
0b86a832 CM |
451 | struct btrfs_root *chunk_root; |
452 | struct btrfs_root *dev_root; | |
0f7d52f4 | 453 | struct radix_tree_root fs_roots_radix; |
1a5bc167 | 454 | |
d1310b2e CM |
455 | struct extent_io_tree free_space_cache; |
456 | struct extent_io_tree block_group_cache; | |
457 | struct extent_io_tree pinned_extents; | |
458 | struct extent_io_tree pending_del; | |
459 | struct extent_io_tree extent_ins; | |
1a5bc167 | 460 | |
0b86a832 CM |
461 | /* logical->physical extent mapping */ |
462 | struct btrfs_mapping_tree mapping_tree; | |
463 | ||
293ffd5f | 464 | u64 generation; |
15ee9bc7 | 465 | u64 last_trans_committed; |
b6cda9bc | 466 | unsigned long mount_opt; |
c59f8951 | 467 | u64 max_extent; |
6f568d35 | 468 | u64 max_inline; |
8f662a76 | 469 | u64 alloc_start; |
79154b1b | 470 | struct btrfs_transaction *running_transaction; |
4b52dff6 | 471 | struct btrfs_super_block super_copy; |
5f39d397 | 472 | struct extent_buffer *sb_buffer; |
0b86a832 | 473 | struct block_device *__bdev; |
e20d96d6 | 474 | struct super_block *sb; |
d98237b3 | 475 | struct inode *btree_inode; |
04160088 | 476 | struct backing_dev_info bdi; |
19c00ddc | 477 | spinlock_t hash_lock; |
79154b1b | 478 | struct mutex trans_mutex; |
d561c025 | 479 | struct mutex fs_mutex; |
8fd17795 | 480 | struct list_head trans_list; |
19c00ddc | 481 | struct list_head hashers; |
facda1e7 | 482 | struct list_head dead_roots; |
6da6abae CM |
483 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) |
484 | struct work_struct trans_work; | |
485 | #else | |
08607c1b | 486 | struct delayed_work trans_work; |
6da6abae | 487 | #endif |
58176a96 JB |
488 | struct kobject super_kobj; |
489 | struct completion kobj_unregister; | |
e66f709b | 490 | int do_barriers; |
facda1e7 | 491 | int closing; |
e2008b61 | 492 | unsigned long throttles; |
9f5fae2f | 493 | |
324ae4df | 494 | u64 total_pinned; |
0b86a832 CM |
495 | struct list_head dirty_cowonly_roots; |
496 | ||
8a4b83cc | 497 | struct btrfs_fs_devices *fs_devices; |
6324fbf3 | 498 | struct list_head space_info; |
1832a6d5 | 499 | spinlock_t delalloc_lock; |
cee36a03 | 500 | spinlock_t new_trans_lock; |
1832a6d5 | 501 | u64 delalloc_bytes; |
e18e4809 | 502 | u64 last_alloc; |
4529ba49 | 503 | u64 last_data_alloc; |
593060d7 CM |
504 | int extra_data_alloc_bits; |
505 | int extra_alloc_bits; | |
324ae4df | 506 | }; |
0b86a832 | 507 | |
9f5fae2f CM |
508 | /* |
509 | * in ram representation of the tree. extent_root is used for all allocations | |
f2458e1d | 510 | * and for the extent tree extent_root root. |
9f5fae2f CM |
511 | */ |
512 | struct btrfs_root { | |
5f39d397 CM |
513 | struct extent_buffer *node; |
514 | struct extent_buffer *commit_root; | |
62e2749e CM |
515 | struct btrfs_root_item root_item; |
516 | struct btrfs_key root_key; | |
9f5fae2f | 517 | struct btrfs_fs_info *fs_info; |
0f7d52f4 | 518 | struct inode *inode; |
58176a96 JB |
519 | struct kobject root_kobj; |
520 | struct completion kobj_unregister; | |
0f7d52f4 CM |
521 | u64 objectid; |
522 | u64 last_trans; | |
5f39d397 CM |
523 | |
524 | /* data allocations are done in sectorsize units */ | |
525 | u32 sectorsize; | |
526 | ||
527 | /* node allocations are done in nodesize units */ | |
528 | u32 nodesize; | |
529 | ||
530 | /* leaf allocations are done in leafsize units */ | |
531 | u32 leafsize; | |
532 | ||
87ee04eb CM |
533 | u32 stripesize; |
534 | ||
9f5fae2f | 535 | u32 type; |
1b05da2e CM |
536 | u64 highest_inode; |
537 | u64 last_inode_alloc; | |
9f3a7427 | 538 | int ref_cows; |
0b86a832 | 539 | int track_dirty; |
6702ed49 CM |
540 | struct btrfs_key defrag_progress; |
541 | int defrag_running; | |
542 | int defrag_level; | |
58176a96 | 543 | char *name; |
4313b399 | 544 | int in_sysfs; |
0b86a832 CM |
545 | |
546 | /* the dirty list is only used by non-reference counted roots */ | |
547 | struct list_head dirty_list; | |
62e2749e CM |
548 | }; |
549 | ||
1e1d2701 | 550 | /* |
0b86a832 | 551 | |
1e1d2701 CM |
552 | * inode items have the data typically returned from stat and store other |
553 | * info about object characteristics. There is one for every file and dir in | |
554 | * the FS | |
555 | */ | |
9078a3e1 | 556 | #define BTRFS_INODE_ITEM_KEY 1 |
3954401f CM |
557 | #define BTRFS_INODE_REF_KEY 2 |
558 | #define BTRFS_XATTR_ITEM_KEY 8 | |
9078a3e1 | 559 | /* reserve 2-15 close to the inode for later flexibility */ |
1e1d2701 CM |
560 | |
561 | /* | |
562 | * dir items are the name -> inode pointers in a directory. There is one | |
563 | * for every name in a directory. | |
564 | */ | |
9078a3e1 CM |
565 | #define BTRFS_DIR_ITEM_KEY 16 |
566 | #define BTRFS_DIR_INDEX_KEY 17 | |
1e1d2701 | 567 | /* |
9078a3e1 | 568 | * extent data is for file data |
1e1d2701 | 569 | */ |
9078a3e1 | 570 | #define BTRFS_EXTENT_DATA_KEY 18 |
f254e52c CM |
571 | /* |
572 | * csum items have the checksums for data in the extents | |
573 | */ | |
9078a3e1 CM |
574 | #define BTRFS_CSUM_ITEM_KEY 19 |
575 | ||
576 | /* reserve 20-31 for other file stuff */ | |
f254e52c | 577 | |
1e1d2701 CM |
578 | /* |
579 | * root items point to tree roots. There are typically in the root | |
580 | * tree used by the super block to find all the other trees | |
581 | */ | |
9078a3e1 | 582 | #define BTRFS_ROOT_ITEM_KEY 32 |
1e1d2701 CM |
583 | /* |
584 | * extent items are in the extent map tree. These record which blocks | |
585 | * are used, and how many references there are to each block | |
586 | */ | |
9078a3e1 | 587 | #define BTRFS_EXTENT_ITEM_KEY 33 |
74493f7a | 588 | #define BTRFS_EXTENT_REF_KEY 34 |
9078a3e1 CM |
589 | |
590 | /* | |
591 | * block groups give us hints into the extent allocation trees. Which | |
592 | * blocks are free etc etc | |
593 | */ | |
74493f7a | 594 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 50 |
9f5fae2f | 595 | |
0b86a832 CM |
596 | #define BTRFS_DEV_EXTENT_KEY 75 |
597 | #define BTRFS_DEV_ITEM_KEY 76 | |
598 | #define BTRFS_CHUNK_ITEM_KEY 77 | |
599 | ||
1e1d2701 CM |
600 | /* |
601 | * string items are for debugging. They just store a short string of | |
602 | * data in the FS | |
603 | */ | |
9078a3e1 CM |
604 | #define BTRFS_STRING_ITEM_KEY 253 |
605 | ||
21ad10cf CM |
606 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
607 | #define BTRFS_MOUNT_NODATACOW (1 << 1) | |
608 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) | |
e18e4809 | 609 | #define BTRFS_MOUNT_SSD (1 << 3) |
b6cda9bc CM |
610 | |
611 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) | |
612 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) | |
613 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ | |
614 | BTRFS_MOUNT_##opt) | |
b98b6767 Y |
615 | /* |
616 | * Inode flags | |
617 | */ | |
fdebe2bd Y |
618 | #define BTRFS_INODE_NODATASUM (1 << 0) |
619 | #define BTRFS_INODE_NODATACOW (1 << 1) | |
620 | #define BTRFS_INODE_READONLY (1 << 2) | |
b98b6767 Y |
621 | #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \ |
622 | ~BTRFS_INODE_##flag) | |
623 | #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \ | |
624 | BTRFS_INODE_##flag) | |
625 | #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \ | |
626 | BTRFS_INODE_##flag) | |
5f39d397 CM |
627 | /* some macros to generate set/get funcs for the struct fields. This |
628 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | |
629 | * one for u8: | |
630 | */ | |
631 | #define le8_to_cpu(v) (v) | |
632 | #define cpu_to_le8(v) (v) | |
633 | #define __le8 u8 | |
634 | ||
635 | #define read_eb_member(eb, ptr, type, member, result) ( \ | |
636 | read_extent_buffer(eb, (char *)(result), \ | |
637 | ((unsigned long)(ptr)) + \ | |
638 | offsetof(type, member), \ | |
639 | sizeof(((type *)0)->member))) | |
640 | ||
641 | #define write_eb_member(eb, ptr, type, member, result) ( \ | |
642 | write_extent_buffer(eb, (char *)(result), \ | |
643 | ((unsigned long)(ptr)) + \ | |
644 | offsetof(type, member), \ | |
645 | sizeof(((type *)0)->member))) | |
646 | ||
0f82731f | 647 | #ifndef BTRFS_SETGET_FUNCS |
5f39d397 | 648 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
0f82731f CM |
649 | u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ |
650 | void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); | |
651 | #endif | |
5f39d397 CM |
652 | |
653 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | |
654 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | |
655 | { \ | |
df68b8a7 DM |
656 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
657 | u##bits res = le##bits##_to_cpu(p->member); \ | |
658 | kunmap_atomic(p, KM_USER0); \ | |
810191ff | 659 | return res; \ |
5f39d397 CM |
660 | } \ |
661 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
662 | u##bits val) \ | |
663 | { \ | |
df68b8a7 DM |
664 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
665 | p->member = cpu_to_le##bits(val); \ | |
666 | kunmap_atomic(p, KM_USER0); \ | |
5f39d397 | 667 | } |
9078a3e1 | 668 | |
5f39d397 CM |
669 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
670 | static inline u##bits btrfs_##name(type *s) \ | |
671 | { \ | |
672 | return le##bits##_to_cpu(s->member); \ | |
673 | } \ | |
674 | static inline void btrfs_set_##name(type *s, u##bits val) \ | |
675 | { \ | |
676 | s->member = cpu_to_le##bits(val); \ | |
1e1d2701 CM |
677 | } |
678 | ||
0b86a832 CM |
679 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
680 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); | |
681 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); | |
682 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); | |
683 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); | |
684 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); | |
685 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); | |
0b86a832 | 686 | |
8a4b83cc CM |
687 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
688 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, | |
689 | total_bytes, 64); | |
690 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, | |
691 | bytes_used, 64); | |
692 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, | |
693 | io_align, 32); | |
694 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, | |
695 | io_width, 32); | |
696 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, | |
697 | sector_size, 32); | |
698 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); | |
699 | ||
0b86a832 CM |
700 | static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) |
701 | { | |
702 | return (char *)d + offsetof(struct btrfs_dev_item, uuid); | |
703 | } | |
704 | ||
0b86a832 CM |
705 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
706 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); | |
707 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); | |
708 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); | |
709 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); | |
710 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); | |
711 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); | |
712 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); | |
713 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); | |
714 | ||
715 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); | |
716 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, | |
717 | stripe_len, 64); | |
718 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, | |
719 | io_align, 32); | |
720 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, | |
721 | io_width, 32); | |
722 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, | |
723 | sector_size, 32); | |
724 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); | |
725 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, | |
726 | num_stripes, 16); | |
727 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); | |
728 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); | |
729 | ||
730 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, | |
731 | int nr) | |
732 | { | |
733 | unsigned long offset = (unsigned long)c; | |
734 | offset += offsetof(struct btrfs_chunk, stripe); | |
735 | offset += nr * sizeof(struct btrfs_stripe); | |
736 | return (struct btrfs_stripe *)offset; | |
737 | } | |
738 | ||
739 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, | |
740 | struct btrfs_chunk *c, int nr) | |
741 | { | |
742 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); | |
743 | } | |
744 | ||
745 | static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, | |
746 | struct btrfs_chunk *c, int nr, | |
747 | u64 val) | |
748 | { | |
749 | btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); | |
750 | } | |
751 | ||
752 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, | |
753 | struct btrfs_chunk *c, int nr) | |
754 | { | |
755 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); | |
756 | } | |
757 | ||
758 | static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, | |
759 | struct btrfs_chunk *c, int nr, | |
760 | u64 val) | |
761 | { | |
762 | btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); | |
763 | } | |
764 | ||
5f39d397 CM |
765 | /* struct btrfs_block_group_item */ |
766 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | |
767 | used, 64); | |
768 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | |
769 | used, 64); | |
0b86a832 CM |
770 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree, struct btrfs_block_group_item, |
771 | chunk_tree, 64); | |
772 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree, struct btrfs_block_group_item, | |
773 | chunk_tree, 64); | |
774 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, | |
775 | struct btrfs_block_group_item, chunk_objectid, 64); | |
776 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd, | |
777 | struct btrfs_block_group_item, chunk_objectid, 64); | |
778 | BTRFS_SETGET_FUNCS(disk_block_group_flags, | |
779 | struct btrfs_block_group_item, flags, 64); | |
780 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, | |
781 | struct btrfs_block_group_item, flags, 64); | |
1e1d2701 | 782 | |
3954401f CM |
783 | /* struct btrfs_inode_ref */ |
784 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); | |
785 | ||
5f39d397 CM |
786 | /* struct btrfs_inode_item */ |
787 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | |
788 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); | |
789 | BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64); | |
790 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); | |
791 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | |
792 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | |
793 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | |
794 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | |
0b86a832 | 795 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
5f39d397 CM |
796 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16); |
797 | BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item, | |
798 | compat_flags, 16); | |
1e1d2701 | 799 | |
0b86a832 | 800 | static inline struct btrfs_timespec * |
5f39d397 | 801 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 802 | { |
5f39d397 CM |
803 | unsigned long ptr = (unsigned long)inode_item; |
804 | ptr += offsetof(struct btrfs_inode_item, atime); | |
0b86a832 | 805 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
806 | } |
807 | ||
0b86a832 | 808 | static inline struct btrfs_timespec * |
5f39d397 | 809 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 810 | { |
5f39d397 CM |
811 | unsigned long ptr = (unsigned long)inode_item; |
812 | ptr += offsetof(struct btrfs_inode_item, mtime); | |
0b86a832 | 813 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
814 | } |
815 | ||
0b86a832 | 816 | static inline struct btrfs_timespec * |
5f39d397 | 817 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 818 | { |
5f39d397 CM |
819 | unsigned long ptr = (unsigned long)inode_item; |
820 | ptr += offsetof(struct btrfs_inode_item, ctime); | |
0b86a832 | 821 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
822 | } |
823 | ||
0b86a832 | 824 | static inline struct btrfs_timespec * |
5f39d397 | 825 | btrfs_inode_otime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 826 | { |
5f39d397 CM |
827 | unsigned long ptr = (unsigned long)inode_item; |
828 | ptr += offsetof(struct btrfs_inode_item, otime); | |
0b86a832 | 829 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
830 | } |
831 | ||
0b86a832 CM |
832 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
833 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); | |
e20d96d6 | 834 | |
5f39d397 CM |
835 | /* struct btrfs_extent_item */ |
836 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32); | |
74493f7a | 837 | |
0b86a832 CM |
838 | /* struct btrfs_dev_extent */ |
839 | BTRFS_SETGET_FUNCS(dev_extent_owner, struct btrfs_dev_extent, owner, 64); | |
840 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); | |
841 | ||
74493f7a CM |
842 | /* struct btrfs_extent_ref */ |
843 | BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64); | |
844 | BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64); | |
845 | BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64); | |
846 | BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64); | |
847 | ||
7bb86316 CM |
848 | BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64); |
849 | BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref, | |
74493f7a | 850 | generation, 64); |
7bb86316 CM |
851 | BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref, |
852 | objectid, 64); | |
853 | BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64); | |
e20d96d6 | 854 | |
5f39d397 CM |
855 | BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, |
856 | refs, 32); | |
e20d96d6 | 857 | |
5f39d397 CM |
858 | /* struct btrfs_node */ |
859 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | |
74493f7a | 860 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
e20d96d6 | 861 | |
5f39d397 | 862 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
cf27e1ee | 863 | { |
5f39d397 CM |
864 | unsigned long ptr; |
865 | ptr = offsetof(struct btrfs_node, ptrs) + | |
866 | sizeof(struct btrfs_key_ptr) * nr; | |
867 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | |
cf27e1ee CM |
868 | } |
869 | ||
5f39d397 CM |
870 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
871 | int nr, u64 val) | |
cf27e1ee | 872 | { |
5f39d397 CM |
873 | unsigned long ptr; |
874 | ptr = offsetof(struct btrfs_node, ptrs) + | |
875 | sizeof(struct btrfs_key_ptr) * nr; | |
876 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | |
cf27e1ee CM |
877 | } |
878 | ||
74493f7a CM |
879 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
880 | { | |
881 | unsigned long ptr; | |
882 | ptr = offsetof(struct btrfs_node, ptrs) + | |
883 | sizeof(struct btrfs_key_ptr) * nr; | |
884 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); | |
885 | } | |
886 | ||
887 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, | |
888 | int nr, u64 val) | |
889 | { | |
890 | unsigned long ptr; | |
891 | ptr = offsetof(struct btrfs_node, ptrs) + | |
892 | sizeof(struct btrfs_key_ptr) * nr; | |
893 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); | |
894 | } | |
895 | ||
810191ff | 896 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
4d775673 | 897 | { |
5f39d397 CM |
898 | return offsetof(struct btrfs_node, ptrs) + |
899 | sizeof(struct btrfs_key_ptr) * nr; | |
4d775673 CM |
900 | } |
901 | ||
e644d021 CM |
902 | void btrfs_node_key(struct extent_buffer *eb, |
903 | struct btrfs_disk_key *disk_key, int nr); | |
904 | ||
5f39d397 CM |
905 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
906 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f8a0c | 907 | { |
5f39d397 CM |
908 | unsigned long ptr; |
909 | ptr = btrfs_node_key_ptr_offset(nr); | |
910 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
911 | struct btrfs_key_ptr, key, disk_key); | |
1d4f8a0c CM |
912 | } |
913 | ||
5f39d397 CM |
914 | /* struct btrfs_item */ |
915 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | |
916 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | |
4d775673 | 917 | |
5f39d397 | 918 | static inline unsigned long btrfs_item_nr_offset(int nr) |
1d4f8a0c | 919 | { |
5f39d397 CM |
920 | return offsetof(struct btrfs_leaf, items) + |
921 | sizeof(struct btrfs_item) * nr; | |
1d4f8a0c CM |
922 | } |
923 | ||
5f39d397 CM |
924 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
925 | int nr) | |
0783fcfc | 926 | { |
5f39d397 | 927 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
0783fcfc CM |
928 | } |
929 | ||
5f39d397 CM |
930 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
931 | struct btrfs_item *item) | |
0783fcfc | 932 | { |
5f39d397 | 933 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
0783fcfc CM |
934 | } |
935 | ||
5f39d397 | 936 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 937 | { |
5f39d397 | 938 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
939 | } |
940 | ||
5f39d397 | 941 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 942 | { |
5f39d397 | 943 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
944 | } |
945 | ||
5f39d397 | 946 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 947 | { |
5f39d397 | 948 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
949 | } |
950 | ||
5f39d397 CM |
951 | static inline void btrfs_item_key(struct extent_buffer *eb, |
952 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 953 | { |
5f39d397 CM |
954 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
955 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
956 | } |
957 | ||
5f39d397 CM |
958 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
959 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 960 | { |
5f39d397 CM |
961 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
962 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
963 | } |
964 | ||
5f39d397 | 965 | /* struct btrfs_dir_item */ |
5103e947 | 966 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
5f39d397 CM |
967 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
968 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | |
1d4f6404 | 969 | |
5f39d397 CM |
970 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
971 | struct btrfs_dir_item *item, | |
972 | struct btrfs_disk_key *key) | |
1d4f6404 | 973 | { |
5f39d397 | 974 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
1d4f6404 CM |
975 | } |
976 | ||
5f39d397 CM |
977 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
978 | struct btrfs_dir_item *item, | |
979 | struct btrfs_disk_key *key) | |
a8a2ee0c | 980 | { |
5f39d397 | 981 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
a8a2ee0c CM |
982 | } |
983 | ||
5f39d397 CM |
984 | /* struct btrfs_disk_key */ |
985 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | |
986 | objectid, 64); | |
987 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | |
988 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | |
1d4f6404 | 989 | |
e2fa7227 CM |
990 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
991 | struct btrfs_disk_key *disk) | |
992 | { | |
993 | cpu->offset = le64_to_cpu(disk->offset); | |
5f39d397 | 994 | cpu->type = disk->type; |
e2fa7227 CM |
995 | cpu->objectid = le64_to_cpu(disk->objectid); |
996 | } | |
997 | ||
998 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
999 | struct btrfs_key *cpu) | |
1000 | { | |
1001 | disk->offset = cpu_to_le64(cpu->offset); | |
5f39d397 | 1002 | disk->type = cpu->type; |
e2fa7227 CM |
1003 | disk->objectid = cpu_to_le64(cpu->objectid); |
1004 | } | |
1005 | ||
5f39d397 CM |
1006 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
1007 | struct btrfs_key *key, int nr) | |
7f5c1516 | 1008 | { |
5f39d397 CM |
1009 | struct btrfs_disk_key disk_key; |
1010 | btrfs_node_key(eb, &disk_key, nr); | |
1011 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
1012 | } |
1013 | ||
5f39d397 CM |
1014 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
1015 | struct btrfs_key *key, int nr) | |
7f5c1516 | 1016 | { |
5f39d397 CM |
1017 | struct btrfs_disk_key disk_key; |
1018 | btrfs_item_key(eb, &disk_key, nr); | |
1019 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
1020 | } |
1021 | ||
5f39d397 CM |
1022 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
1023 | struct btrfs_dir_item *item, | |
1024 | struct btrfs_key *key) | |
4d775673 | 1025 | { |
5f39d397 CM |
1026 | struct btrfs_disk_key disk_key; |
1027 | btrfs_dir_item_key(eb, item, &disk_key); | |
1028 | btrfs_disk_key_to_cpu(key, &disk_key); | |
4d775673 CM |
1029 | } |
1030 | ||
58176a96 | 1031 | |
5f39d397 | 1032 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
3768f368 | 1033 | { |
5f39d397 | 1034 | return key->type; |
3768f368 CM |
1035 | } |
1036 | ||
5f39d397 | 1037 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
3768f368 | 1038 | { |
5f39d397 | 1039 | key->type = val; |
3768f368 CM |
1040 | } |
1041 | ||
5f39d397 | 1042 | /* struct btrfs_header */ |
db94535d | 1043 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
5f39d397 CM |
1044 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
1045 | generation, 64); | |
1046 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | |
1047 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | |
1048 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 16); | |
1049 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); | |
0f7d52f4 | 1050 | |
5f39d397 | 1051 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
0f7d52f4 | 1052 | { |
5f39d397 CM |
1053 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
1054 | return (u8 *)ptr; | |
0f7d52f4 CM |
1055 | } |
1056 | ||
5f39d397 | 1057 | static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) |
3768f368 | 1058 | { |
5f39d397 CM |
1059 | unsigned long ptr = offsetof(struct btrfs_super_block, fsid); |
1060 | return (u8 *)ptr; | |
3768f368 CM |
1061 | } |
1062 | ||
5f39d397 | 1063 | static inline u8 *btrfs_header_csum(struct extent_buffer *eb) |
3768f368 | 1064 | { |
5f39d397 CM |
1065 | unsigned long ptr = offsetof(struct btrfs_header, csum); |
1066 | return (u8 *)ptr; | |
3768f368 CM |
1067 | } |
1068 | ||
5f39d397 | 1069 | static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) |
3768f368 | 1070 | { |
5f39d397 | 1071 | return NULL; |
3768f368 CM |
1072 | } |
1073 | ||
5f39d397 | 1074 | static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) |
3768f368 | 1075 | { |
5f39d397 | 1076 | return NULL; |
3768f368 CM |
1077 | } |
1078 | ||
5f39d397 | 1079 | static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) |
3768f368 | 1080 | { |
5f39d397 | 1081 | return NULL; |
3768f368 CM |
1082 | } |
1083 | ||
5f39d397 | 1084 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
3768f368 | 1085 | { |
5f39d397 | 1086 | return (btrfs_header_level(eb) == 0); |
3768f368 CM |
1087 | } |
1088 | ||
5f39d397 CM |
1089 | /* struct btrfs_root_item */ |
1090 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); | |
db94535d CM |
1091 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
1092 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); | |
3768f368 | 1093 | |
db94535d CM |
1094 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
1095 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); | |
5f39d397 CM |
1096 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
1097 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | |
1098 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32); | |
db94535d CM |
1099 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
1100 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); | |
123abc88 | 1101 | |
5f39d397 | 1102 | /* struct btrfs_super_block */ |
db94535d | 1103 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
5f39d397 CM |
1104 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
1105 | generation, 64); | |
1106 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | |
0b86a832 CM |
1107 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
1108 | struct btrfs_super_block, sys_chunk_array_size, 32); | |
db94535d CM |
1109 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
1110 | root_level, 8); | |
0b86a832 CM |
1111 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
1112 | chunk_root, 64); | |
1113 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, | |
1114 | chunk_root_level, 64); | |
db94535d CM |
1115 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
1116 | total_bytes, 64); | |
1117 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, | |
1118 | bytes_used, 64); | |
5f39d397 CM |
1119 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
1120 | sectorsize, 32); | |
1121 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | |
1122 | nodesize, 32); | |
1123 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, | |
1124 | leafsize, 32); | |
87ee04eb CM |
1125 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
1126 | stripesize, 32); | |
5f39d397 CM |
1127 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
1128 | root_dir_objectid, 64); | |
8a4b83cc CM |
1129 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
1130 | num_devices, 64); | |
2e635a27 | 1131 | |
5f39d397 | 1132 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
2e635a27 | 1133 | { |
5f39d397 | 1134 | return offsetof(struct btrfs_leaf, items); |
2e635a27 CM |
1135 | } |
1136 | ||
5f39d397 CM |
1137 | /* struct btrfs_file_extent_item */ |
1138 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | |
9f5fae2f | 1139 | |
5f39d397 | 1140 | static inline unsigned long btrfs_file_extent_inline_start(struct |
236454df CM |
1141 | btrfs_file_extent_item *e) |
1142 | { | |
5f39d397 | 1143 | unsigned long offset = (unsigned long)e; |
db94535d | 1144 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 1145 | return offset; |
236454df CM |
1146 | } |
1147 | ||
1148 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
1149 | { | |
db94535d | 1150 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
9f5fae2f CM |
1151 | } |
1152 | ||
5f39d397 CM |
1153 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, |
1154 | struct btrfs_item *e) | |
9f5fae2f | 1155 | { |
5f39d397 | 1156 | unsigned long offset; |
db94535d | 1157 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 1158 | return btrfs_item_size(eb, e) - offset; |
9f5fae2f CM |
1159 | } |
1160 | ||
db94535d CM |
1161 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
1162 | disk_bytenr, 64); | |
5f39d397 CM |
1163 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
1164 | generation, 64); | |
db94535d CM |
1165 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
1166 | disk_num_bytes, 64); | |
5f39d397 CM |
1167 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
1168 | offset, 64); | |
db94535d CM |
1169 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
1170 | num_bytes, 64); | |
9f5fae2f | 1171 | |
e20d96d6 CM |
1172 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
1173 | { | |
1174 | return sb->s_fs_info; | |
1175 | } | |
1176 | ||
58176a96 JB |
1177 | static inline int btrfs_set_root_name(struct btrfs_root *root, |
1178 | const char *name, int len) | |
1179 | { | |
1180 | /* if we already have a name just free it */ | |
1181 | if (root->name) | |
1182 | kfree(root->name); | |
1183 | ||
1184 | root->name = kmalloc(len+1, GFP_KERNEL); | |
1185 | if (!root->name) | |
1186 | return -ENOMEM; | |
1187 | ||
1188 | memcpy(root->name, name, len); | |
1189 | root->name[len] ='\0'; | |
1190 | ||
1191 | return 0; | |
1192 | } | |
1193 | ||
db94535d CM |
1194 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) { |
1195 | if (level == 0) | |
1196 | return root->leafsize; | |
1197 | return root->nodesize; | |
1198 | } | |
1199 | ||
4beb1b8b CM |
1200 | /* helper function to cast into the data area of the leaf. */ |
1201 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 | 1202 | ((type *)(btrfs_leaf_data(leaf) + \ |
5f39d397 CM |
1203 | btrfs_item_offset_nr(leaf, slot))) |
1204 | ||
1205 | #define btrfs_item_ptr_offset(leaf, slot) \ | |
1206 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | |
1207 | btrfs_item_offset_nr(leaf, slot))) | |
4beb1b8b | 1208 | |
6da6abae CM |
1209 | static inline struct dentry *fdentry(struct file *file) { |
1210 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) | |
1211 | return file->f_dentry; | |
1212 | #else | |
1213 | return file->f_path.dentry; | |
1214 | #endif | |
1215 | } | |
1216 | ||
b18c6685 | 1217 | /* extent-tree.c */ |
be20aa9d CM |
1218 | u32 btrfs_count_snapshots_in_path(struct btrfs_root *root, |
1219 | struct btrfs_path *count_path, | |
1220 | u64 first_extent); | |
e9d0b13b CM |
1221 | int btrfs_extent_post_op(struct btrfs_trans_handle *trans, |
1222 | struct btrfs_root *root); | |
d1310b2e | 1223 | int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy); |
5276aeda CM |
1224 | struct btrfs_block_group_cache *btrfs_lookup_block_group(struct |
1225 | btrfs_fs_info *info, | |
db94535d | 1226 | u64 bytenr); |
31f3c99b CM |
1227 | struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root, |
1228 | struct btrfs_block_group_cache | |
be744175 | 1229 | *hint, u64 search_start, |
de428b63 | 1230 | int data, int owner); |
c5739bba | 1231 | int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, |
7bb86316 | 1232 | struct btrfs_root *root, u64 owner_objectid); |
5f39d397 | 1233 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
db94535d | 1234 | struct btrfs_root *root, u32 size, |
7bb86316 | 1235 | u64 root_objectid, |
db94535d | 1236 | u64 hint, u64 empty_size); |
7bb86316 CM |
1237 | struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
1238 | struct btrfs_root *root, | |
1239 | u32 blocksize, | |
1240 | u64 root_objectid, | |
1241 | u64 ref_generation, | |
1242 | u64 first_objectid, | |
1243 | int level, | |
1244 | u64 hint, | |
1245 | u64 empty_size); | |
edbd8d4e CM |
1246 | int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans, |
1247 | struct btrfs_root *root, u64 new_size); | |
1248 | int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size); | |
7bb86316 CM |
1249 | int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans, |
1250 | struct btrfs_root *root, | |
1251 | struct btrfs_path *path, u64 bytenr, | |
1252 | u64 root_objectid, u64 ref_generation, | |
1253 | u64 owner, u64 owner_offset); | |
4d775673 | 1254 | int btrfs_alloc_extent(struct btrfs_trans_handle *trans, |
7bb86316 CM |
1255 | struct btrfs_root *root, |
1256 | u64 num_bytes, u64 root_objectid, u64 ref_generation, | |
1257 | u64 owner, u64 owner_offset, | |
1258 | u64 empty_size, u64 hint_byte, | |
be08c1b9 | 1259 | u64 search_end, struct btrfs_key *ins, int data); |
e089f05c | 1260 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
5f39d397 | 1261 | struct extent_buffer *buf); |
e089f05c | 1262 | int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
7bb86316 CM |
1263 | *root, u64 bytenr, u64 num_bytes, |
1264 | u64 root_objectid, u64 ref_generation, | |
1265 | u64 owner_objectid, u64 owner_offset, int pin); | |
ccd467d6 CM |
1266 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
1267 | struct btrfs_root *root, | |
d1310b2e | 1268 | struct extent_io_tree *unpin); |
b18c6685 CM |
1269 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
1270 | struct btrfs_root *root, | |
7bb86316 CM |
1271 | u64 bytenr, u64 num_bytes, |
1272 | u64 root_objectid, u64 ref_generation, | |
1273 | u64 owner, u64 owner_offset); | |
9078a3e1 CM |
1274 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
1275 | struct btrfs_root *root); | |
1276 | int btrfs_free_block_groups(struct btrfs_fs_info *info); | |
1277 | int btrfs_read_block_groups(struct btrfs_root *root); | |
0b86a832 CM |
1278 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
1279 | struct btrfs_root *root, u64 bytes_used, | |
1280 | u64 type, u64 chunk_tree, u64 chunk_objectid, | |
1281 | u64 size); | |
dee26a9f | 1282 | /* ctree.c */ |
0b86a832 CM |
1283 | int btrfs_previous_item(struct btrfs_root *root, |
1284 | struct btrfs_path *path, u64 min_objectid, | |
1285 | int type); | |
5f39d397 CM |
1286 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
1287 | struct btrfs_root *root, struct extent_buffer *buf, | |
1288 | struct extent_buffer *parent, int parent_slot, | |
1289 | struct extent_buffer **cow_ret); | |
be20aa9d CM |
1290 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
1291 | struct btrfs_root *root, | |
1292 | struct extent_buffer *buf, | |
1293 | struct extent_buffer **cow_ret, u64 new_root_objectid); | |
6567e837 CM |
1294 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
1295 | *root, struct btrfs_path *path, u32 data_size); | |
b18c6685 CM |
1296 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
1297 | struct btrfs_root *root, | |
1298 | struct btrfs_path *path, | |
179e29e4 | 1299 | u32 new_size, int from_end); |
e089f05c CM |
1300 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
1301 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
1302 | ins_len, int cow); | |
6702ed49 | 1303 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
5f39d397 | 1304 | struct btrfs_root *root, struct extent_buffer *parent, |
a6b6e75e CM |
1305 | int start_slot, int cache_only, u64 *last_ret, |
1306 | struct btrfs_key *progress); | |
234b63a0 | 1307 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
2c90e5d6 CM |
1308 | struct btrfs_path *btrfs_alloc_path(void); |
1309 | void btrfs_free_path(struct btrfs_path *p); | |
234b63a0 | 1310 | void btrfs_init_path(struct btrfs_path *p); |
85e21bac CM |
1311 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
1312 | struct btrfs_path *path, int slot, int nr); | |
1313 | ||
1314 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, | |
1315 | struct btrfs_root *root, | |
1316 | struct btrfs_path *path) | |
1317 | { | |
1318 | return btrfs_del_items(trans, root, path, path->slots[0], 1); | |
1319 | } | |
1320 | ||
e089f05c CM |
1321 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
1322 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
9c58309d CM |
1323 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
1324 | struct btrfs_root *root, | |
1325 | struct btrfs_path *path, | |
1326 | struct btrfs_key *cpu_key, u32 *data_size, int nr); | |
1327 | ||
1328 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, | |
1329 | struct btrfs_root *root, | |
1330 | struct btrfs_path *path, | |
1331 | struct btrfs_key *key, | |
1332 | u32 data_size) | |
1333 | { | |
1334 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); | |
1335 | } | |
1336 | ||
234b63a0 | 1337 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
7bb86316 | 1338 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
5f39d397 | 1339 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
e089f05c | 1340 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
9f3a7427 | 1341 | *root); |
dee26a9f | 1342 | /* root-item.c */ |
e089f05c CM |
1343 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
1344 | struct btrfs_key *key); | |
1345 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
1346 | *root, struct btrfs_key *key, struct btrfs_root_item | |
1347 | *item); | |
1348 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
1349 | *root, struct btrfs_key *key, struct btrfs_root_item | |
1350 | *item); | |
1351 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct | |
1352 | btrfs_root_item *item, struct btrfs_key *key); | |
5ce14bbc CM |
1353 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid, |
1354 | struct btrfs_root *latest_root); | |
dee26a9f | 1355 | /* dir-item.c */ |
e089f05c | 1356 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
1357 | *root, const char *name, int name_len, u64 dir, |
1358 | struct btrfs_key *location, u8 type); | |
7e38180e CM |
1359 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
1360 | struct btrfs_root *root, | |
1361 | struct btrfs_path *path, u64 dir, | |
1362 | const char *name, int name_len, | |
1363 | int mod); | |
1364 | struct btrfs_dir_item * | |
1365 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | |
1366 | struct btrfs_root *root, | |
1367 | struct btrfs_path *path, u64 dir, | |
1368 | u64 objectid, const char *name, int name_len, | |
1369 | int mod); | |
1370 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, | |
1371 | struct btrfs_path *path, | |
7f5c1516 | 1372 | const char *name, int name_len); |
7e38180e CM |
1373 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
1374 | struct btrfs_root *root, | |
1375 | struct btrfs_path *path, | |
1376 | struct btrfs_dir_item *di); | |
5103e947 JB |
1377 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
1378 | struct btrfs_root *root, const char *name, | |
1379 | u16 name_len, const void *data, u16 data_len, | |
1380 | u64 dir); | |
1381 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, | |
1382 | struct btrfs_root *root, | |
1383 | struct btrfs_path *path, u64 dir, | |
1384 | const char *name, u16 name_len, | |
1385 | int mod); | |
dee26a9f | 1386 | /* inode-map.c */ |
9f5fae2f CM |
1387 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
1388 | struct btrfs_root *fs_root, | |
1389 | u64 dirid, u64 *objectid); | |
5be6f7f1 CM |
1390 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
1391 | ||
dee26a9f | 1392 | /* inode-item.c */ |
3954401f CM |
1393 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
1394 | struct btrfs_root *root, | |
1395 | const char *name, int name_len, | |
1396 | u64 inode_objectid, u64 ref_objectid); | |
1397 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, | |
1398 | struct btrfs_root *root, | |
1399 | const char *name, int name_len, | |
1400 | u64 inode_objectid, u64 ref_objectid); | |
5f39d397 CM |
1401 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
1402 | struct btrfs_root *root, | |
1403 | struct btrfs_path *path, u64 objectid); | |
293ffd5f | 1404 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
1405 | *root, struct btrfs_path *path, |
1406 | struct btrfs_key *location, int mod); | |
dee26a9f CM |
1407 | |
1408 | /* file-item.c */ | |
b18c6685 | 1409 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
dee26a9f | 1410 | struct btrfs_root *root, |
b18c6685 | 1411 | u64 objectid, u64 pos, u64 offset, |
db94535d CM |
1412 | u64 disk_num_bytes, |
1413 | u64 num_bytes); | |
dee26a9f CM |
1414 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
1415 | struct btrfs_root *root, | |
1416 | struct btrfs_path *path, u64 objectid, | |
db94535d | 1417 | u64 bytenr, int mod); |
065631f6 CM |
1418 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
1419 | struct btrfs_root *root, struct inode *inode, | |
1420 | struct bio *bio); | |
b18c6685 CM |
1421 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
1422 | struct btrfs_root *root, | |
1423 | struct btrfs_path *path, | |
1424 | u64 objectid, u64 offset, | |
1425 | int cow); | |
1de037a4 CM |
1426 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
1427 | struct btrfs_root *root, struct btrfs_path *path, | |
1428 | u64 isize); | |
39279cc3 | 1429 | /* inode.c */ |
239b14b3 CM |
1430 | int btrfs_merge_bio_hook(struct page *page, unsigned long offset, |
1431 | size_t size, struct bio *bio); | |
1432 | ||
9069218d CM |
1433 | static inline void dec_i_blocks(struct inode *inode, u64 dec) |
1434 | { | |
1435 | dec = dec >> 9; | |
1436 | if (dec <= inode->i_blocks) | |
1437 | inode->i_blocks -= dec; | |
1438 | else | |
1439 | inode->i_blocks = 0; | |
1440 | } | |
1441 | ||
edbd8d4e CM |
1442 | unsigned long btrfs_force_ra(struct address_space *mapping, |
1443 | struct file_ra_state *ra, struct file *file, | |
1444 | pgoff_t offset, pgoff_t last_index); | |
1832a6d5 CM |
1445 | int btrfs_check_free_space(struct btrfs_root *root, u64 num_required, |
1446 | int for_del); | |
9ebefb18 CM |
1447 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page); |
1448 | int btrfs_readpage(struct file *file, struct page *page); | |
39279cc3 | 1449 | void btrfs_delete_inode(struct inode *inode); |
2da98f00 | 1450 | void btrfs_put_inode(struct inode *inode); |
39279cc3 CM |
1451 | void btrfs_read_locked_inode(struct inode *inode); |
1452 | int btrfs_write_inode(struct inode *inode, int wait); | |
1453 | void btrfs_dirty_inode(struct inode *inode); | |
1454 | struct inode *btrfs_alloc_inode(struct super_block *sb); | |
1455 | void btrfs_destroy_inode(struct inode *inode); | |
1456 | int btrfs_init_cachep(void); | |
1457 | void btrfs_destroy_cachep(void); | |
34287aa3 | 1458 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
39279cc3 CM |
1459 | struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid, |
1460 | struct btrfs_root *root); | |
dc17ff8f CM |
1461 | struct inode *btrfs_ilookup(struct super_block *s, u64 objectid, |
1462 | u64 root_objectid); | |
39279cc3 CM |
1463 | int btrfs_commit_write(struct file *file, struct page *page, |
1464 | unsigned from, unsigned to); | |
a52d9a80 CM |
1465 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
1466 | size_t page_offset, u64 start, u64 end, | |
1467 | int create); | |
1468 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
1469 | struct btrfs_root *root, | |
1470 | struct inode *inode); | |
39279cc3 | 1471 | /* file.c */ |
a52d9a80 | 1472 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end); |
5f56406a | 1473 | int btrfs_check_file(struct btrfs_root *root, struct inode *inode); |
39279cc3 CM |
1474 | extern struct file_operations btrfs_file_operations; |
1475 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, | |
1476 | struct btrfs_root *root, struct inode *inode, | |
00f5c795 | 1477 | u64 start, u64 end, u64 inline_limit, u64 *hint_block); |
6702ed49 CM |
1478 | /* tree-defrag.c */ |
1479 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | |
1480 | struct btrfs_root *root, int cache_only); | |
58176a96 JB |
1481 | |
1482 | /* sysfs.c */ | |
1483 | int btrfs_init_sysfs(void); | |
1484 | void btrfs_exit_sysfs(void); | |
1485 | int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); | |
1486 | int btrfs_sysfs_add_root(struct btrfs_root *root); | |
1487 | void btrfs_sysfs_del_root(struct btrfs_root *root); | |
1488 | void btrfs_sysfs_del_super(struct btrfs_fs_info *root); | |
1489 | ||
5103e947 JB |
1490 | /* xattr.c */ |
1491 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
1492 | int btrfs_delete_xattrs(struct btrfs_trans_handle *trans, | |
1493 | struct btrfs_root *root, struct inode *inode); | |
edbd8d4e CM |
1494 | /* super.c */ |
1495 | u64 btrfs_parse_size(char *str); | |
eb60ceac | 1496 | #endif |