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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> |
479965d6 | 28 | #include <asm/kmap_types.h> |
8ef97622 | 29 | #include "bit-radix.h" |
d1310b2e | 30 | #include "extent_io.h" |
5f39d397 | 31 | #include "extent_map.h" |
e20d96d6 | 32 | |
e089f05c | 33 | struct btrfs_trans_handle; |
79154b1b | 34 | struct btrfs_transaction; |
35b7e476 CM |
35 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
36 | extern struct kmem_cache *btrfs_transaction_cachep; | |
37 | extern struct kmem_cache *btrfs_bit_radix_cachep; | |
2c90e5d6 | 38 | extern struct kmem_cache *btrfs_path_cachep; |
e089f05c | 39 | |
47b0c4f8 | 40 | #define BTRFS_MAGIC "_B4RfS_M" |
eb60ceac | 41 | |
f6dbff55 | 42 | #define BTRFS_MAX_LEVEL 8 |
0b86a832 CM |
43 | |
44 | /* holds pointers to all of the tree roots */ | |
6407bf6d | 45 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
0b86a832 CM |
46 | |
47 | /* stores information about which extents are in use, and reference counts */ | |
0cf6c620 | 48 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
0b86a832 | 49 | |
0b86a832 CM |
50 | /* |
51 | * chunk tree stores translations from logical -> physical block numbering | |
52 | * the super block points to the chunk tree | |
53 | */ | |
e085def2 | 54 | #define BTRFS_CHUNK_TREE_OBJECTID 3ULL |
0b86a832 CM |
55 | |
56 | /* | |
57 | * stores information about which areas of a given device are in use. | |
58 | * one per device. The tree of tree roots points to the device tree | |
59 | */ | |
e085def2 CM |
60 | #define BTRFS_DEV_TREE_OBJECTID 4ULL |
61 | ||
62 | /* one per subvolume, storing files and directories */ | |
63 | #define BTRFS_FS_TREE_OBJECTID 5ULL | |
64 | ||
65 | /* directory objectid inside the root tree */ | |
66 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL | |
0b86a832 CM |
67 | |
68 | /* | |
69 | * All files have objectids higher than this. | |
70 | */ | |
f6dbff55 | 71 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
3768f368 | 72 | |
0b86a832 CM |
73 | |
74 | /* | |
75 | * the device items go into the chunk tree. The key is in the form | |
76 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] | |
77 | */ | |
78 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL | |
79 | ||
e20d96d6 CM |
80 | /* |
81 | * we can actually store much bigger names, but lets not confuse the rest | |
82 | * of linux | |
83 | */ | |
84 | #define BTRFS_NAME_LEN 255 | |
85 | ||
f254e52c CM |
86 | /* 32 bytes in various csum fields */ |
87 | #define BTRFS_CSUM_SIZE 32 | |
509659cd CM |
88 | /* four bytes for CRC32 */ |
89 | #define BTRFS_CRC32_SIZE 4 | |
3954401f | 90 | #define BTRFS_EMPTY_DIR_SIZE 0 |
f254e52c | 91 | |
fabb5681 CM |
92 | #define BTRFS_FT_UNKNOWN 0 |
93 | #define BTRFS_FT_REG_FILE 1 | |
94 | #define BTRFS_FT_DIR 2 | |
95 | #define BTRFS_FT_CHRDEV 3 | |
96 | #define BTRFS_FT_BLKDEV 4 | |
97 | #define BTRFS_FT_FIFO 5 | |
98 | #define BTRFS_FT_SOCK 6 | |
99 | #define BTRFS_FT_SYMLINK 7 | |
5103e947 JB |
100 | #define BTRFS_FT_XATTR 8 |
101 | #define BTRFS_FT_MAX 9 | |
fabb5681 | 102 | |
fec577fb CM |
103 | /* |
104 | * the key defines the order in the tree, and so it also defines (optimal) | |
105 | * block layout. objectid corresonds to the inode number. The flags | |
106 | * tells us things about the object, and is a kind of stream selector. | |
107 | * so for a given inode, keys with flags of 1 might refer to the inode | |
108 | * data, flags of 2 may point to file data in the btree and flags == 3 | |
109 | * may point to extents. | |
110 | * | |
111 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
112 | * |
113 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
114 | * in cpu native order. Otherwise they are identical and their sizes | |
115 | * should be the same (ie both packed) | |
fec577fb | 116 | */ |
e2fa7227 CM |
117 | struct btrfs_disk_key { |
118 | __le64 objectid; | |
5f39d397 | 119 | u8 type; |
70b2befd | 120 | __le64 offset; |
e2fa7227 CM |
121 | } __attribute__ ((__packed__)); |
122 | ||
123 | struct btrfs_key { | |
eb60ceac | 124 | u64 objectid; |
5f39d397 | 125 | u8 type; |
70b2befd | 126 | u64 offset; |
eb60ceac CM |
127 | } __attribute__ ((__packed__)); |
128 | ||
0b86a832 CM |
129 | struct btrfs_mapping_tree { |
130 | struct extent_map_tree map_tree; | |
131 | }; | |
132 | ||
133 | #define BTRFS_DEV_UUID_SIZE 16 | |
134 | struct btrfs_dev_item { | |
135 | /* the internal btrfs device id */ | |
136 | __le64 devid; | |
137 | ||
138 | /* size of the device */ | |
139 | __le64 total_bytes; | |
140 | ||
141 | /* bytes used */ | |
142 | __le64 bytes_used; | |
143 | ||
144 | /* optimal io alignment for this device */ | |
145 | __le32 io_align; | |
146 | ||
147 | /* optimal io width for this device */ | |
148 | __le32 io_width; | |
149 | ||
150 | /* minimal io size for this device */ | |
151 | __le32 sector_size; | |
152 | ||
153 | /* the kernel device number */ | |
154 | __le64 rdev; | |
155 | ||
156 | /* type and info about this device */ | |
157 | __le64 type; | |
158 | ||
159 | /* partition number, 0 for whole dev */ | |
160 | __le32 partition; | |
161 | ||
162 | /* length of the name data at the end of the item */ | |
163 | __le16 name_len; | |
164 | ||
165 | /* physical drive uuid (or lvm uuid) */ | |
166 | u8 uuid[BTRFS_DEV_UUID_SIZE]; | |
167 | /* name goes here */ | |
168 | } __attribute__ ((__packed__)); | |
169 | ||
170 | struct btrfs_stripe { | |
171 | __le64 devid; | |
172 | __le64 offset; | |
173 | } __attribute__ ((__packed__)); | |
174 | ||
175 | struct btrfs_chunk { | |
176 | __le64 owner; | |
177 | __le64 stripe_len; | |
178 | __le64 type; | |
179 | ||
180 | /* optimal io alignment for this chunk */ | |
181 | __le32 io_align; | |
182 | ||
183 | /* optimal io width for this chunk */ | |
184 | __le32 io_width; | |
185 | ||
186 | /* minimal io size for this chunk */ | |
187 | __le32 sector_size; | |
188 | ||
189 | /* 2^16 stripes is quite a lot, a second limit is the size of a single | |
190 | * item in the btree | |
191 | */ | |
192 | __le16 num_stripes; | |
193 | struct btrfs_stripe stripe; | |
194 | /* additional stripes go here */ | |
195 | } __attribute__ ((__packed__)); | |
196 | ||
197 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) | |
198 | { | |
199 | BUG_ON(num_stripes == 0); | |
200 | return sizeof(struct btrfs_chunk) + | |
201 | sizeof(struct btrfs_stripe) * (num_stripes - 1); | |
202 | } | |
203 | ||
5f39d397 | 204 | #define BTRFS_FSID_SIZE 16 |
fec577fb CM |
205 | /* |
206 | * every tree block (leaf or node) starts with this header. | |
207 | */ | |
bb492bb0 | 208 | struct btrfs_header { |
f254e52c | 209 | u8 csum[BTRFS_CSUM_SIZE]; |
5f39d397 | 210 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 211 | __le64 bytenr; /* which block this node is supposed to live in */ |
7f5c1516 | 212 | __le64 generation; |
4d775673 | 213 | __le64 owner; |
5f39d397 | 214 | __le32 nritems; |
bb492bb0 | 215 | __le16 flags; |
9a6f11ed | 216 | u8 level; |
eb60ceac CM |
217 | } __attribute__ ((__packed__)); |
218 | ||
5f39d397 | 219 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
123abc88 | 220 | sizeof(struct btrfs_header)) / \ |
74493f7a | 221 | sizeof(struct btrfs_key_ptr)) |
123abc88 | 222 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
5f39d397 | 223 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
236454df CM |
224 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
225 | sizeof(struct btrfs_item) - \ | |
226 | sizeof(struct btrfs_file_extent_item)) | |
eb60ceac | 227 | |
0b86a832 CM |
228 | |
229 | /* | |
230 | * this is a very generous portion of the super block, giving us | |
231 | * room to translate 14 chunks with 3 stripes each. | |
232 | */ | |
233 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 | |
234 | ||
fec577fb CM |
235 | /* |
236 | * the super block basically lists the main trees of the FS | |
237 | * it currently lacks any block count etc etc | |
238 | */ | |
234b63a0 | 239 | struct btrfs_super_block { |
f254e52c | 240 | u8 csum[BTRFS_CSUM_SIZE]; |
87cbda5c | 241 | /* the first 3 fields must match struct btrfs_header */ |
3768f368 | 242 | u8 fsid[16]; /* FS specific uuid */ |
db94535d | 243 | __le64 bytenr; /* this block number */ |
3768f368 | 244 | __le64 magic; |
3768f368 CM |
245 | __le64 generation; |
246 | __le64 root; | |
0b86a832 | 247 | __le64 chunk_root; |
db94535d CM |
248 | __le64 total_bytes; |
249 | __le64 bytes_used; | |
2e635a27 | 250 | __le64 root_dir_objectid; |
5f39d397 CM |
251 | __le32 sectorsize; |
252 | __le32 nodesize; | |
253 | __le32 leafsize; | |
87ee04eb | 254 | __le32 stripesize; |
0b86a832 | 255 | __le32 sys_chunk_array_size; |
db94535d | 256 | u8 root_level; |
0b86a832 CM |
257 | u8 chunk_root_level; |
258 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; | |
cfaa7295 CM |
259 | } __attribute__ ((__packed__)); |
260 | ||
fec577fb | 261 | /* |
62e2749e | 262 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
263 | * the item in the leaf (relative to the start of the data area) |
264 | */ | |
0783fcfc | 265 | struct btrfs_item { |
e2fa7227 | 266 | struct btrfs_disk_key key; |
123abc88 | 267 | __le32 offset; |
5f39d397 | 268 | __le32 size; |
eb60ceac CM |
269 | } __attribute__ ((__packed__)); |
270 | ||
fec577fb CM |
271 | /* |
272 | * leaves have an item area and a data area: | |
273 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
274 | * | |
275 | * The data is separate from the items to get the keys closer together | |
276 | * during searches. | |
277 | */ | |
234b63a0 | 278 | struct btrfs_leaf { |
bb492bb0 | 279 | struct btrfs_header header; |
123abc88 | 280 | struct btrfs_item items[]; |
eb60ceac CM |
281 | } __attribute__ ((__packed__)); |
282 | ||
fec577fb CM |
283 | /* |
284 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
285 | * other blocks | |
286 | */ | |
123abc88 CM |
287 | struct btrfs_key_ptr { |
288 | struct btrfs_disk_key key; | |
289 | __le64 blockptr; | |
74493f7a | 290 | __le64 generation; |
123abc88 CM |
291 | } __attribute__ ((__packed__)); |
292 | ||
234b63a0 | 293 | struct btrfs_node { |
bb492bb0 | 294 | struct btrfs_header header; |
123abc88 | 295 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
296 | } __attribute__ ((__packed__)); |
297 | ||
fec577fb | 298 | /* |
234b63a0 CM |
299 | * btrfs_paths remember the path taken from the root down to the leaf. |
300 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
301 | * to any other levels that are present. |
302 | * | |
303 | * The slots array records the index of the item or block pointer | |
304 | * used while walking the tree. | |
305 | */ | |
234b63a0 | 306 | struct btrfs_path { |
5f39d397 | 307 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
234b63a0 | 308 | int slots[BTRFS_MAX_LEVEL]; |
3c69faec | 309 | int reada; |
6702ed49 | 310 | int lowest_level; |
eb60ceac | 311 | }; |
5de08d7d | 312 | |
62e2749e CM |
313 | /* |
314 | * items in the extent btree are used to record the objectid of the | |
315 | * owner of the block and the number of references | |
316 | */ | |
317 | struct btrfs_extent_item { | |
318 | __le32 refs; | |
74493f7a CM |
319 | } __attribute__ ((__packed__)); |
320 | ||
321 | struct btrfs_extent_ref { | |
322 | __le64 root; | |
323 | __le64 generation; | |
324 | __le64 objectid; | |
325 | __le64 offset; | |
62e2749e CM |
326 | } __attribute__ ((__packed__)); |
327 | ||
0b86a832 CM |
328 | /* dev extents record free space on individual devices. The owner |
329 | * field points back to the chunk allocation mapping tree that allocated | |
330 | * the extent | |
331 | */ | |
332 | struct btrfs_dev_extent { | |
333 | __le64 owner; | |
334 | __le64 length; | |
335 | } __attribute__ ((__packed__)); | |
336 | ||
337 | ||
3954401f CM |
338 | struct btrfs_inode_ref { |
339 | __le16 name_len; | |
340 | /* name goes here */ | |
341 | } __attribute__ ((__packed__)); | |
342 | ||
0b86a832 | 343 | struct btrfs_timespec { |
f254e52c | 344 | __le64 sec; |
1e1d2701 CM |
345 | __le32 nsec; |
346 | } __attribute__ ((__packed__)); | |
347 | ||
348 | /* | |
349 | * there is no padding here on purpose. If you want to extent the inode, | |
350 | * make a new item type | |
351 | */ | |
352 | struct btrfs_inode_item { | |
353 | __le64 generation; | |
354 | __le64 size; | |
355 | __le64 nblocks; | |
31f3c99b | 356 | __le64 block_group; |
1e1d2701 CM |
357 | __le32 nlink; |
358 | __le32 uid; | |
359 | __le32 gid; | |
360 | __le32 mode; | |
0b86a832 | 361 | __le64 rdev; |
1e1d2701 CM |
362 | __le16 flags; |
363 | __le16 compat_flags; | |
0b86a832 CM |
364 | struct btrfs_timespec atime; |
365 | struct btrfs_timespec ctime; | |
366 | struct btrfs_timespec mtime; | |
367 | struct btrfs_timespec otime; | |
1e1d2701 CM |
368 | } __attribute__ ((__packed__)); |
369 | ||
62e2749e | 370 | struct btrfs_dir_item { |
d6e4a428 | 371 | struct btrfs_disk_key location; |
5103e947 | 372 | __le16 data_len; |
a8a2ee0c | 373 | __le16 name_len; |
62e2749e CM |
374 | u8 type; |
375 | } __attribute__ ((__packed__)); | |
376 | ||
377 | struct btrfs_root_item { | |
d6e4a428 CM |
378 | struct btrfs_inode_item inode; |
379 | __le64 root_dirid; | |
db94535d CM |
380 | __le64 bytenr; |
381 | __le64 byte_limit; | |
382 | __le64 bytes_used; | |
5eda7b5e | 383 | __le32 flags; |
62e2749e | 384 | __le32 refs; |
5eda7b5e CM |
385 | struct btrfs_disk_key drop_progress; |
386 | u8 drop_level; | |
db94535d | 387 | u8 level; |
9f5fae2f | 388 | } __attribute__ ((__packed__)); |
62e2749e | 389 | |
236454df CM |
390 | #define BTRFS_FILE_EXTENT_REG 0 |
391 | #define BTRFS_FILE_EXTENT_INLINE 1 | |
392 | ||
9f5fae2f | 393 | struct btrfs_file_extent_item { |
71951f35 | 394 | __le64 generation; |
236454df | 395 | u8 type; |
9f5fae2f CM |
396 | /* |
397 | * disk space consumed by the extent, checksum blocks are included | |
398 | * in these numbers | |
399 | */ | |
db94535d CM |
400 | __le64 disk_bytenr; |
401 | __le64 disk_num_bytes; | |
9f5fae2f | 402 | /* |
dee26a9f | 403 | * the logical offset in file blocks (no csums) |
9f5fae2f CM |
404 | * this extent record is for. This allows a file extent to point |
405 | * into the middle of an existing extent on disk, sharing it | |
406 | * between two snapshots (useful if some bytes in the middle of the | |
407 | * extent have changed | |
408 | */ | |
409 | __le64 offset; | |
410 | /* | |
411 | * the logical number of file blocks (no csums included) | |
412 | */ | |
db94535d | 413 | __le64 num_bytes; |
9f5fae2f CM |
414 | } __attribute__ ((__packed__)); |
415 | ||
f254e52c | 416 | struct btrfs_csum_item { |
509659cd | 417 | u8 csum; |
f254e52c CM |
418 | } __attribute__ ((__packed__)); |
419 | ||
0b86a832 CM |
420 | /* different types of block groups (and chunks) */ |
421 | #define BTRFS_BLOCK_GROUP_DATA (1 << 0) | |
422 | #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1) | |
423 | #define BTRFS_BLOCK_GROUP_METADATA (1 << 2) | |
1e2677e0 | 424 | |
f84a8b36 | 425 | |
9078a3e1 CM |
426 | struct btrfs_block_group_item { |
427 | __le64 used; | |
0b86a832 CM |
428 | __le64 chunk_tree; |
429 | __le64 chunk_objectid; | |
430 | __le64 flags; | |
9078a3e1 CM |
431 | } __attribute__ ((__packed__)); |
432 | ||
6324fbf3 CM |
433 | struct btrfs_space_info { |
434 | u64 flags; | |
435 | u64 total_bytes; | |
436 | u64 bytes_used; | |
437 | u64 bytes_pinned; | |
438 | int full; | |
439 | struct list_head list; | |
440 | }; | |
441 | ||
9078a3e1 CM |
442 | struct btrfs_block_group_cache { |
443 | struct btrfs_key key; | |
444 | struct btrfs_block_group_item item; | |
6324fbf3 | 445 | struct btrfs_space_info *space_info; |
324ae4df | 446 | u64 pinned; |
0b86a832 CM |
447 | u64 flags; |
448 | int cached; | |
9078a3e1 | 449 | }; |
0b86a832 CM |
450 | |
451 | struct btrfs_device; | |
9f5fae2f | 452 | struct btrfs_fs_info { |
5f39d397 | 453 | u8 fsid[BTRFS_FSID_SIZE]; |
62e2749e CM |
454 | struct btrfs_root *extent_root; |
455 | struct btrfs_root *tree_root; | |
0b86a832 CM |
456 | struct btrfs_root *chunk_root; |
457 | struct btrfs_root *dev_root; | |
0f7d52f4 | 458 | struct radix_tree_root fs_roots_radix; |
1a5bc167 | 459 | |
d1310b2e CM |
460 | struct extent_io_tree free_space_cache; |
461 | struct extent_io_tree block_group_cache; | |
462 | struct extent_io_tree pinned_extents; | |
463 | struct extent_io_tree pending_del; | |
464 | struct extent_io_tree extent_ins; | |
1a5bc167 | 465 | |
0b86a832 CM |
466 | /* logical->physical extent mapping */ |
467 | struct btrfs_mapping_tree mapping_tree; | |
468 | ||
293ffd5f | 469 | u64 generation; |
15ee9bc7 | 470 | u64 last_trans_committed; |
b6cda9bc | 471 | unsigned long mount_opt; |
c59f8951 | 472 | u64 max_extent; |
6f568d35 | 473 | u64 max_inline; |
8f662a76 | 474 | u64 alloc_start; |
79154b1b | 475 | struct btrfs_transaction *running_transaction; |
4b52dff6 | 476 | struct btrfs_super_block super_copy; |
5f39d397 | 477 | struct extent_buffer *sb_buffer; |
0b86a832 | 478 | struct block_device *__bdev; |
e20d96d6 | 479 | struct super_block *sb; |
d98237b3 | 480 | struct inode *btree_inode; |
19c00ddc | 481 | spinlock_t hash_lock; |
79154b1b | 482 | struct mutex trans_mutex; |
d561c025 | 483 | struct mutex fs_mutex; |
8fd17795 | 484 | struct list_head trans_list; |
19c00ddc | 485 | struct list_head hashers; |
facda1e7 | 486 | struct list_head dead_roots; |
6da6abae CM |
487 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) |
488 | struct work_struct trans_work; | |
489 | #else | |
08607c1b | 490 | struct delayed_work trans_work; |
6da6abae | 491 | #endif |
58176a96 JB |
492 | struct kobject super_kobj; |
493 | struct completion kobj_unregister; | |
e66f709b | 494 | int do_barriers; |
facda1e7 | 495 | int closing; |
e2008b61 | 496 | unsigned long throttles; |
9f5fae2f | 497 | |
324ae4df | 498 | u64 total_pinned; |
0b86a832 CM |
499 | struct list_head dirty_cowonly_roots; |
500 | ||
501 | struct list_head devices; | |
6324fbf3 | 502 | struct list_head space_info; |
1832a6d5 | 503 | spinlock_t delalloc_lock; |
cee36a03 | 504 | spinlock_t new_trans_lock; |
1832a6d5 | 505 | u64 delalloc_bytes; |
e18e4809 | 506 | u64 last_alloc; |
4529ba49 | 507 | u64 last_data_alloc; |
324ae4df | 508 | }; |
0b86a832 | 509 | |
9f5fae2f CM |
510 | /* |
511 | * in ram representation of the tree. extent_root is used for all allocations | |
f2458e1d | 512 | * and for the extent tree extent_root root. |
9f5fae2f CM |
513 | */ |
514 | struct btrfs_root { | |
5f39d397 CM |
515 | struct extent_buffer *node; |
516 | struct extent_buffer *commit_root; | |
62e2749e CM |
517 | struct btrfs_root_item root_item; |
518 | struct btrfs_key root_key; | |
9f5fae2f | 519 | struct btrfs_fs_info *fs_info; |
0f7d52f4 | 520 | struct inode *inode; |
58176a96 JB |
521 | struct kobject root_kobj; |
522 | struct completion kobj_unregister; | |
0f7d52f4 CM |
523 | u64 objectid; |
524 | u64 last_trans; | |
5f39d397 CM |
525 | |
526 | /* data allocations are done in sectorsize units */ | |
527 | u32 sectorsize; | |
528 | ||
529 | /* node allocations are done in nodesize units */ | |
530 | u32 nodesize; | |
531 | ||
532 | /* leaf allocations are done in leafsize units */ | |
533 | u32 leafsize; | |
534 | ||
87ee04eb CM |
535 | u32 stripesize; |
536 | ||
9f5fae2f | 537 | u32 type; |
1b05da2e CM |
538 | u64 highest_inode; |
539 | u64 last_inode_alloc; | |
9f3a7427 | 540 | int ref_cows; |
0b86a832 | 541 | int track_dirty; |
6702ed49 CM |
542 | struct btrfs_key defrag_progress; |
543 | int defrag_running; | |
544 | int defrag_level; | |
58176a96 | 545 | char *name; |
4313b399 | 546 | int in_sysfs; |
0b86a832 CM |
547 | |
548 | /* the dirty list is only used by non-reference counted roots */ | |
549 | struct list_head dirty_list; | |
62e2749e CM |
550 | }; |
551 | ||
1e1d2701 | 552 | /* |
0b86a832 | 553 | |
1e1d2701 CM |
554 | * inode items have the data typically returned from stat and store other |
555 | * info about object characteristics. There is one for every file and dir in | |
556 | * the FS | |
557 | */ | |
9078a3e1 | 558 | #define BTRFS_INODE_ITEM_KEY 1 |
3954401f CM |
559 | #define BTRFS_INODE_REF_KEY 2 |
560 | #define BTRFS_XATTR_ITEM_KEY 8 | |
9078a3e1 | 561 | /* reserve 2-15 close to the inode for later flexibility */ |
1e1d2701 CM |
562 | |
563 | /* | |
564 | * dir items are the name -> inode pointers in a directory. There is one | |
565 | * for every name in a directory. | |
566 | */ | |
9078a3e1 CM |
567 | #define BTRFS_DIR_ITEM_KEY 16 |
568 | #define BTRFS_DIR_INDEX_KEY 17 | |
1e1d2701 | 569 | /* |
9078a3e1 | 570 | * extent data is for file data |
1e1d2701 | 571 | */ |
9078a3e1 | 572 | #define BTRFS_EXTENT_DATA_KEY 18 |
f254e52c CM |
573 | /* |
574 | * csum items have the checksums for data in the extents | |
575 | */ | |
9078a3e1 CM |
576 | #define BTRFS_CSUM_ITEM_KEY 19 |
577 | ||
578 | /* reserve 20-31 for other file stuff */ | |
f254e52c | 579 | |
1e1d2701 CM |
580 | /* |
581 | * root items point to tree roots. There are typically in the root | |
582 | * tree used by the super block to find all the other trees | |
583 | */ | |
9078a3e1 | 584 | #define BTRFS_ROOT_ITEM_KEY 32 |
1e1d2701 CM |
585 | /* |
586 | * extent items are in the extent map tree. These record which blocks | |
587 | * are used, and how many references there are to each block | |
588 | */ | |
9078a3e1 | 589 | #define BTRFS_EXTENT_ITEM_KEY 33 |
74493f7a | 590 | #define BTRFS_EXTENT_REF_KEY 34 |
9078a3e1 CM |
591 | |
592 | /* | |
593 | * block groups give us hints into the extent allocation trees. Which | |
594 | * blocks are free etc etc | |
595 | */ | |
74493f7a | 596 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 50 |
9f5fae2f | 597 | |
0b86a832 CM |
598 | #define BTRFS_DEV_EXTENT_KEY 75 |
599 | #define BTRFS_DEV_ITEM_KEY 76 | |
600 | #define BTRFS_CHUNK_ITEM_KEY 77 | |
601 | ||
1e1d2701 CM |
602 | /* |
603 | * string items are for debugging. They just store a short string of | |
604 | * data in the FS | |
605 | */ | |
9078a3e1 CM |
606 | #define BTRFS_STRING_ITEM_KEY 253 |
607 | ||
21ad10cf CM |
608 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
609 | #define BTRFS_MOUNT_NODATACOW (1 << 1) | |
610 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) | |
e18e4809 | 611 | #define BTRFS_MOUNT_SSD (1 << 3) |
b6cda9bc CM |
612 | |
613 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) | |
614 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) | |
615 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ | |
616 | BTRFS_MOUNT_##opt) | |
b98b6767 Y |
617 | /* |
618 | * Inode flags | |
619 | */ | |
fdebe2bd Y |
620 | #define BTRFS_INODE_NODATASUM (1 << 0) |
621 | #define BTRFS_INODE_NODATACOW (1 << 1) | |
622 | #define BTRFS_INODE_READONLY (1 << 2) | |
b98b6767 Y |
623 | #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \ |
624 | ~BTRFS_INODE_##flag) | |
625 | #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \ | |
626 | BTRFS_INODE_##flag) | |
627 | #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \ | |
628 | BTRFS_INODE_##flag) | |
5f39d397 CM |
629 | /* some macros to generate set/get funcs for the struct fields. This |
630 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | |
631 | * one for u8: | |
632 | */ | |
633 | #define le8_to_cpu(v) (v) | |
634 | #define cpu_to_le8(v) (v) | |
635 | #define __le8 u8 | |
636 | ||
637 | #define read_eb_member(eb, ptr, type, member, result) ( \ | |
638 | read_extent_buffer(eb, (char *)(result), \ | |
639 | ((unsigned long)(ptr)) + \ | |
640 | offsetof(type, member), \ | |
641 | sizeof(((type *)0)->member))) | |
642 | ||
643 | #define write_eb_member(eb, ptr, type, member, result) ( \ | |
644 | write_extent_buffer(eb, (char *)(result), \ | |
645 | ((unsigned long)(ptr)) + \ | |
646 | offsetof(type, member), \ | |
647 | sizeof(((type *)0)->member))) | |
648 | ||
0f82731f | 649 | #ifndef BTRFS_SETGET_FUNCS |
5f39d397 | 650 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
0f82731f CM |
651 | u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ |
652 | void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); | |
653 | #endif | |
5f39d397 CM |
654 | |
655 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | |
656 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | |
657 | { \ | |
df68b8a7 DM |
658 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
659 | u##bits res = le##bits##_to_cpu(p->member); \ | |
660 | kunmap_atomic(p, KM_USER0); \ | |
810191ff | 661 | return res; \ |
5f39d397 CM |
662 | } \ |
663 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
664 | u##bits val) \ | |
665 | { \ | |
df68b8a7 DM |
666 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
667 | p->member = cpu_to_le##bits(val); \ | |
668 | kunmap_atomic(p, KM_USER0); \ | |
5f39d397 | 669 | } |
9078a3e1 | 670 | |
5f39d397 CM |
671 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
672 | static inline u##bits btrfs_##name(type *s) \ | |
673 | { \ | |
674 | return le##bits##_to_cpu(s->member); \ | |
675 | } \ | |
676 | static inline void btrfs_set_##name(type *s, u##bits val) \ | |
677 | { \ | |
678 | s->member = cpu_to_le##bits(val); \ | |
1e1d2701 CM |
679 | } |
680 | ||
0b86a832 CM |
681 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
682 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); | |
683 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); | |
684 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); | |
685 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); | |
686 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); | |
687 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); | |
688 | BTRFS_SETGET_FUNCS(device_rdev, struct btrfs_dev_item, rdev, 64); | |
689 | BTRFS_SETGET_FUNCS(device_partition, struct btrfs_dev_item, partition, 32); | |
690 | BTRFS_SETGET_FUNCS(device_name_len, struct btrfs_dev_item, name_len, 16); | |
691 | ||
692 | static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) | |
693 | { | |
694 | return (char *)d + offsetof(struct btrfs_dev_item, uuid); | |
695 | } | |
696 | ||
697 | static inline char *btrfs_device_name(struct btrfs_dev_item *d) | |
698 | { | |
699 | return (char *)(d + 1); | |
700 | } | |
701 | ||
702 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); | |
703 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); | |
704 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); | |
705 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); | |
706 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); | |
707 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); | |
708 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); | |
709 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); | |
710 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); | |
711 | ||
712 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); | |
713 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, | |
714 | stripe_len, 64); | |
715 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, | |
716 | io_align, 32); | |
717 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, | |
718 | io_width, 32); | |
719 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, | |
720 | sector_size, 32); | |
721 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); | |
722 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, | |
723 | num_stripes, 16); | |
724 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); | |
725 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); | |
726 | ||
727 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, | |
728 | int nr) | |
729 | { | |
730 | unsigned long offset = (unsigned long)c; | |
731 | offset += offsetof(struct btrfs_chunk, stripe); | |
732 | offset += nr * sizeof(struct btrfs_stripe); | |
733 | return (struct btrfs_stripe *)offset; | |
734 | } | |
735 | ||
736 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, | |
737 | struct btrfs_chunk *c, int nr) | |
738 | { | |
739 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); | |
740 | } | |
741 | ||
742 | static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, | |
743 | struct btrfs_chunk *c, int nr, | |
744 | u64 val) | |
745 | { | |
746 | btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); | |
747 | } | |
748 | ||
749 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, | |
750 | struct btrfs_chunk *c, int nr) | |
751 | { | |
752 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); | |
753 | } | |
754 | ||
755 | static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, | |
756 | struct btrfs_chunk *c, int nr, | |
757 | u64 val) | |
758 | { | |
759 | btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); | |
760 | } | |
761 | ||
5f39d397 CM |
762 | /* struct btrfs_block_group_item */ |
763 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | |
764 | used, 64); | |
765 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | |
766 | used, 64); | |
0b86a832 CM |
767 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree, struct btrfs_block_group_item, |
768 | chunk_tree, 64); | |
769 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree, struct btrfs_block_group_item, | |
770 | chunk_tree, 64); | |
771 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, | |
772 | struct btrfs_block_group_item, chunk_objectid, 64); | |
773 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd, | |
774 | struct btrfs_block_group_item, chunk_objectid, 64); | |
775 | BTRFS_SETGET_FUNCS(disk_block_group_flags, | |
776 | struct btrfs_block_group_item, flags, 64); | |
777 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, | |
778 | struct btrfs_block_group_item, flags, 64); | |
1e1d2701 | 779 | |
3954401f CM |
780 | /* struct btrfs_inode_ref */ |
781 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); | |
782 | ||
5f39d397 CM |
783 | /* struct btrfs_inode_item */ |
784 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | |
785 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); | |
786 | BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64); | |
787 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); | |
788 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | |
789 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | |
790 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | |
791 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | |
0b86a832 | 792 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
5f39d397 CM |
793 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16); |
794 | BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item, | |
795 | compat_flags, 16); | |
1e1d2701 | 796 | |
0b86a832 | 797 | static inline struct btrfs_timespec * |
5f39d397 | 798 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 799 | { |
5f39d397 CM |
800 | unsigned long ptr = (unsigned long)inode_item; |
801 | ptr += offsetof(struct btrfs_inode_item, atime); | |
0b86a832 | 802 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
803 | } |
804 | ||
0b86a832 | 805 | static inline struct btrfs_timespec * |
5f39d397 | 806 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 807 | { |
5f39d397 CM |
808 | unsigned long ptr = (unsigned long)inode_item; |
809 | ptr += offsetof(struct btrfs_inode_item, mtime); | |
0b86a832 | 810 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
811 | } |
812 | ||
0b86a832 | 813 | static inline struct btrfs_timespec * |
5f39d397 | 814 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 815 | { |
5f39d397 CM |
816 | unsigned long ptr = (unsigned long)inode_item; |
817 | ptr += offsetof(struct btrfs_inode_item, ctime); | |
0b86a832 | 818 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
819 | } |
820 | ||
0b86a832 | 821 | static inline struct btrfs_timespec * |
5f39d397 | 822 | btrfs_inode_otime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 823 | { |
5f39d397 CM |
824 | unsigned long ptr = (unsigned long)inode_item; |
825 | ptr += offsetof(struct btrfs_inode_item, otime); | |
0b86a832 | 826 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
827 | } |
828 | ||
0b86a832 CM |
829 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
830 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); | |
e20d96d6 | 831 | |
5f39d397 CM |
832 | /* struct btrfs_extent_item */ |
833 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32); | |
74493f7a | 834 | |
0b86a832 CM |
835 | /* struct btrfs_dev_extent */ |
836 | BTRFS_SETGET_FUNCS(dev_extent_owner, struct btrfs_dev_extent, owner, 64); | |
837 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); | |
838 | ||
74493f7a CM |
839 | /* struct btrfs_extent_ref */ |
840 | BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64); | |
841 | BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64); | |
842 | BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64); | |
843 | BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64); | |
844 | ||
7bb86316 CM |
845 | BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64); |
846 | BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref, | |
74493f7a | 847 | generation, 64); |
7bb86316 CM |
848 | BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref, |
849 | objectid, 64); | |
850 | BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64); | |
e20d96d6 | 851 | |
5f39d397 CM |
852 | BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, |
853 | refs, 32); | |
e20d96d6 | 854 | |
5f39d397 CM |
855 | /* struct btrfs_node */ |
856 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | |
74493f7a | 857 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
e20d96d6 | 858 | |
5f39d397 | 859 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
cf27e1ee | 860 | { |
5f39d397 CM |
861 | unsigned long ptr; |
862 | ptr = offsetof(struct btrfs_node, ptrs) + | |
863 | sizeof(struct btrfs_key_ptr) * nr; | |
864 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | |
cf27e1ee CM |
865 | } |
866 | ||
5f39d397 CM |
867 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
868 | int nr, u64 val) | |
cf27e1ee | 869 | { |
5f39d397 CM |
870 | unsigned long ptr; |
871 | ptr = offsetof(struct btrfs_node, ptrs) + | |
872 | sizeof(struct btrfs_key_ptr) * nr; | |
873 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | |
cf27e1ee CM |
874 | } |
875 | ||
74493f7a CM |
876 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
877 | { | |
878 | unsigned long ptr; | |
879 | ptr = offsetof(struct btrfs_node, ptrs) + | |
880 | sizeof(struct btrfs_key_ptr) * nr; | |
881 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); | |
882 | } | |
883 | ||
884 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, | |
885 | int nr, u64 val) | |
886 | { | |
887 | unsigned long ptr; | |
888 | ptr = offsetof(struct btrfs_node, ptrs) + | |
889 | sizeof(struct btrfs_key_ptr) * nr; | |
890 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); | |
891 | } | |
892 | ||
810191ff | 893 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
4d775673 | 894 | { |
5f39d397 CM |
895 | return offsetof(struct btrfs_node, ptrs) + |
896 | sizeof(struct btrfs_key_ptr) * nr; | |
4d775673 CM |
897 | } |
898 | ||
e644d021 CM |
899 | void btrfs_node_key(struct extent_buffer *eb, |
900 | struct btrfs_disk_key *disk_key, int nr); | |
901 | ||
5f39d397 CM |
902 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
903 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f8a0c | 904 | { |
5f39d397 CM |
905 | unsigned long ptr; |
906 | ptr = btrfs_node_key_ptr_offset(nr); | |
907 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
908 | struct btrfs_key_ptr, key, disk_key); | |
1d4f8a0c CM |
909 | } |
910 | ||
5f39d397 CM |
911 | /* struct btrfs_item */ |
912 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | |
913 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | |
4d775673 | 914 | |
5f39d397 | 915 | static inline unsigned long btrfs_item_nr_offset(int nr) |
1d4f8a0c | 916 | { |
5f39d397 CM |
917 | return offsetof(struct btrfs_leaf, items) + |
918 | sizeof(struct btrfs_item) * nr; | |
1d4f8a0c CM |
919 | } |
920 | ||
5f39d397 CM |
921 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
922 | int nr) | |
0783fcfc | 923 | { |
5f39d397 | 924 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
0783fcfc CM |
925 | } |
926 | ||
5f39d397 CM |
927 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
928 | struct btrfs_item *item) | |
0783fcfc | 929 | { |
5f39d397 | 930 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
0783fcfc CM |
931 | } |
932 | ||
5f39d397 | 933 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 934 | { |
5f39d397 | 935 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
936 | } |
937 | ||
5f39d397 | 938 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 939 | { |
5f39d397 | 940 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
941 | } |
942 | ||
5f39d397 | 943 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 944 | { |
5f39d397 | 945 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
946 | } |
947 | ||
5f39d397 CM |
948 | static inline void btrfs_item_key(struct extent_buffer *eb, |
949 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 950 | { |
5f39d397 CM |
951 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
952 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
953 | } |
954 | ||
5f39d397 CM |
955 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
956 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 957 | { |
5f39d397 CM |
958 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
959 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
960 | } |
961 | ||
5f39d397 | 962 | /* struct btrfs_dir_item */ |
5103e947 | 963 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
5f39d397 CM |
964 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
965 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | |
1d4f6404 | 966 | |
5f39d397 CM |
967 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
968 | struct btrfs_dir_item *item, | |
969 | struct btrfs_disk_key *key) | |
1d4f6404 | 970 | { |
5f39d397 | 971 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
1d4f6404 CM |
972 | } |
973 | ||
5f39d397 CM |
974 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
975 | struct btrfs_dir_item *item, | |
976 | struct btrfs_disk_key *key) | |
a8a2ee0c | 977 | { |
5f39d397 | 978 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
a8a2ee0c CM |
979 | } |
980 | ||
5f39d397 CM |
981 | /* struct btrfs_disk_key */ |
982 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | |
983 | objectid, 64); | |
984 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | |
985 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | |
1d4f6404 | 986 | |
e2fa7227 CM |
987 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
988 | struct btrfs_disk_key *disk) | |
989 | { | |
990 | cpu->offset = le64_to_cpu(disk->offset); | |
5f39d397 | 991 | cpu->type = disk->type; |
e2fa7227 CM |
992 | cpu->objectid = le64_to_cpu(disk->objectid); |
993 | } | |
994 | ||
995 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
996 | struct btrfs_key *cpu) | |
997 | { | |
998 | disk->offset = cpu_to_le64(cpu->offset); | |
5f39d397 | 999 | disk->type = cpu->type; |
e2fa7227 CM |
1000 | disk->objectid = cpu_to_le64(cpu->objectid); |
1001 | } | |
1002 | ||
5f39d397 CM |
1003 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
1004 | struct btrfs_key *key, int nr) | |
7f5c1516 | 1005 | { |
5f39d397 CM |
1006 | struct btrfs_disk_key disk_key; |
1007 | btrfs_node_key(eb, &disk_key, nr); | |
1008 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
1009 | } |
1010 | ||
5f39d397 CM |
1011 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
1012 | struct btrfs_key *key, int nr) | |
7f5c1516 | 1013 | { |
5f39d397 CM |
1014 | struct btrfs_disk_key disk_key; |
1015 | btrfs_item_key(eb, &disk_key, nr); | |
1016 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
1017 | } |
1018 | ||
5f39d397 CM |
1019 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
1020 | struct btrfs_dir_item *item, | |
1021 | struct btrfs_key *key) | |
4d775673 | 1022 | { |
5f39d397 CM |
1023 | struct btrfs_disk_key disk_key; |
1024 | btrfs_dir_item_key(eb, item, &disk_key); | |
1025 | btrfs_disk_key_to_cpu(key, &disk_key); | |
4d775673 CM |
1026 | } |
1027 | ||
58176a96 | 1028 | |
5f39d397 | 1029 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
3768f368 | 1030 | { |
5f39d397 | 1031 | return key->type; |
3768f368 CM |
1032 | } |
1033 | ||
5f39d397 | 1034 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
3768f368 | 1035 | { |
5f39d397 | 1036 | key->type = val; |
3768f368 CM |
1037 | } |
1038 | ||
5f39d397 | 1039 | /* struct btrfs_header */ |
db94535d | 1040 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
5f39d397 CM |
1041 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
1042 | generation, 64); | |
1043 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | |
1044 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | |
1045 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 16); | |
1046 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); | |
0f7d52f4 | 1047 | |
5f39d397 | 1048 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
0f7d52f4 | 1049 | { |
5f39d397 CM |
1050 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
1051 | return (u8 *)ptr; | |
0f7d52f4 CM |
1052 | } |
1053 | ||
5f39d397 | 1054 | static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) |
3768f368 | 1055 | { |
5f39d397 CM |
1056 | unsigned long ptr = offsetof(struct btrfs_super_block, fsid); |
1057 | return (u8 *)ptr; | |
3768f368 CM |
1058 | } |
1059 | ||
5f39d397 | 1060 | static inline u8 *btrfs_header_csum(struct extent_buffer *eb) |
3768f368 | 1061 | { |
5f39d397 CM |
1062 | unsigned long ptr = offsetof(struct btrfs_header, csum); |
1063 | return (u8 *)ptr; | |
3768f368 CM |
1064 | } |
1065 | ||
5f39d397 | 1066 | static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) |
3768f368 | 1067 | { |
5f39d397 | 1068 | return NULL; |
3768f368 CM |
1069 | } |
1070 | ||
5f39d397 | 1071 | static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) |
3768f368 | 1072 | { |
5f39d397 | 1073 | return NULL; |
3768f368 CM |
1074 | } |
1075 | ||
5f39d397 | 1076 | static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) |
3768f368 | 1077 | { |
5f39d397 | 1078 | return NULL; |
3768f368 CM |
1079 | } |
1080 | ||
5f39d397 | 1081 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
3768f368 | 1082 | { |
5f39d397 | 1083 | return (btrfs_header_level(eb) == 0); |
3768f368 CM |
1084 | } |
1085 | ||
5f39d397 CM |
1086 | /* struct btrfs_root_item */ |
1087 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); | |
db94535d CM |
1088 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
1089 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); | |
3768f368 | 1090 | |
db94535d CM |
1091 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
1092 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); | |
5f39d397 CM |
1093 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
1094 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | |
1095 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32); | |
db94535d CM |
1096 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
1097 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); | |
123abc88 | 1098 | |
5f39d397 | 1099 | /* struct btrfs_super_block */ |
db94535d | 1100 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
5f39d397 CM |
1101 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
1102 | generation, 64); | |
1103 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | |
0b86a832 CM |
1104 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
1105 | struct btrfs_super_block, sys_chunk_array_size, 32); | |
db94535d CM |
1106 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
1107 | root_level, 8); | |
0b86a832 CM |
1108 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
1109 | chunk_root, 64); | |
1110 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, | |
1111 | chunk_root_level, 64); | |
db94535d CM |
1112 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
1113 | total_bytes, 64); | |
1114 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, | |
1115 | bytes_used, 64); | |
5f39d397 CM |
1116 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
1117 | sectorsize, 32); | |
1118 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | |
1119 | nodesize, 32); | |
1120 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, | |
1121 | leafsize, 32); | |
87ee04eb CM |
1122 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
1123 | stripesize, 32); | |
5f39d397 CM |
1124 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
1125 | root_dir_objectid, 64); | |
2e635a27 | 1126 | |
5f39d397 | 1127 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
2e635a27 | 1128 | { |
5f39d397 | 1129 | return offsetof(struct btrfs_leaf, items); |
2e635a27 CM |
1130 | } |
1131 | ||
5f39d397 CM |
1132 | /* struct btrfs_file_extent_item */ |
1133 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | |
9f5fae2f | 1134 | |
5f39d397 | 1135 | static inline unsigned long btrfs_file_extent_inline_start(struct |
236454df CM |
1136 | btrfs_file_extent_item *e) |
1137 | { | |
5f39d397 | 1138 | unsigned long offset = (unsigned long)e; |
db94535d | 1139 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 1140 | return offset; |
236454df CM |
1141 | } |
1142 | ||
1143 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
1144 | { | |
db94535d | 1145 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
9f5fae2f CM |
1146 | } |
1147 | ||
5f39d397 CM |
1148 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, |
1149 | struct btrfs_item *e) | |
9f5fae2f | 1150 | { |
5f39d397 | 1151 | unsigned long offset; |
db94535d | 1152 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 1153 | return btrfs_item_size(eb, e) - offset; |
9f5fae2f CM |
1154 | } |
1155 | ||
db94535d CM |
1156 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
1157 | disk_bytenr, 64); | |
5f39d397 CM |
1158 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
1159 | generation, 64); | |
db94535d CM |
1160 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
1161 | disk_num_bytes, 64); | |
5f39d397 CM |
1162 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
1163 | offset, 64); | |
db94535d CM |
1164 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
1165 | num_bytes, 64); | |
9f5fae2f | 1166 | |
e20d96d6 CM |
1167 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
1168 | { | |
1169 | return sb->s_fs_info; | |
1170 | } | |
1171 | ||
58176a96 JB |
1172 | static inline int btrfs_set_root_name(struct btrfs_root *root, |
1173 | const char *name, int len) | |
1174 | { | |
1175 | /* if we already have a name just free it */ | |
1176 | if (root->name) | |
1177 | kfree(root->name); | |
1178 | ||
1179 | root->name = kmalloc(len+1, GFP_KERNEL); | |
1180 | if (!root->name) | |
1181 | return -ENOMEM; | |
1182 | ||
1183 | memcpy(root->name, name, len); | |
1184 | root->name[len] ='\0'; | |
1185 | ||
1186 | return 0; | |
1187 | } | |
1188 | ||
db94535d CM |
1189 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) { |
1190 | if (level == 0) | |
1191 | return root->leafsize; | |
1192 | return root->nodesize; | |
1193 | } | |
1194 | ||
4beb1b8b CM |
1195 | /* helper function to cast into the data area of the leaf. */ |
1196 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 | 1197 | ((type *)(btrfs_leaf_data(leaf) + \ |
5f39d397 CM |
1198 | btrfs_item_offset_nr(leaf, slot))) |
1199 | ||
1200 | #define btrfs_item_ptr_offset(leaf, slot) \ | |
1201 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | |
1202 | btrfs_item_offset_nr(leaf, slot))) | |
4beb1b8b | 1203 | |
6da6abae CM |
1204 | static inline struct dentry *fdentry(struct file *file) { |
1205 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) | |
1206 | return file->f_dentry; | |
1207 | #else | |
1208 | return file->f_path.dentry; | |
1209 | #endif | |
1210 | } | |
1211 | ||
b18c6685 | 1212 | /* extent-tree.c */ |
be20aa9d CM |
1213 | u32 btrfs_count_snapshots_in_path(struct btrfs_root *root, |
1214 | struct btrfs_path *count_path, | |
1215 | u64 first_extent); | |
e9d0b13b CM |
1216 | int btrfs_extent_post_op(struct btrfs_trans_handle *trans, |
1217 | struct btrfs_root *root); | |
d1310b2e | 1218 | int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy); |
5276aeda CM |
1219 | struct btrfs_block_group_cache *btrfs_lookup_block_group(struct |
1220 | btrfs_fs_info *info, | |
db94535d | 1221 | u64 bytenr); |
31f3c99b CM |
1222 | struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root, |
1223 | struct btrfs_block_group_cache | |
be744175 | 1224 | *hint, u64 search_start, |
de428b63 | 1225 | int data, int owner); |
c5739bba | 1226 | int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, |
7bb86316 | 1227 | struct btrfs_root *root, u64 owner_objectid); |
5f39d397 | 1228 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
db94535d | 1229 | struct btrfs_root *root, u32 size, |
7bb86316 | 1230 | u64 root_objectid, |
db94535d | 1231 | u64 hint, u64 empty_size); |
7bb86316 CM |
1232 | struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
1233 | struct btrfs_root *root, | |
1234 | u32 blocksize, | |
1235 | u64 root_objectid, | |
1236 | u64 ref_generation, | |
1237 | u64 first_objectid, | |
1238 | int level, | |
1239 | u64 hint, | |
1240 | u64 empty_size); | |
edbd8d4e CM |
1241 | int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans, |
1242 | struct btrfs_root *root, u64 new_size); | |
1243 | int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size); | |
7bb86316 CM |
1244 | int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans, |
1245 | struct btrfs_root *root, | |
1246 | struct btrfs_path *path, u64 bytenr, | |
1247 | u64 root_objectid, u64 ref_generation, | |
1248 | u64 owner, u64 owner_offset); | |
4d775673 | 1249 | int btrfs_alloc_extent(struct btrfs_trans_handle *trans, |
7bb86316 CM |
1250 | struct btrfs_root *root, |
1251 | u64 num_bytes, u64 root_objectid, u64 ref_generation, | |
1252 | u64 owner, u64 owner_offset, | |
1253 | u64 empty_size, u64 hint_byte, | |
be08c1b9 | 1254 | u64 search_end, struct btrfs_key *ins, int data); |
e089f05c | 1255 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
5f39d397 | 1256 | struct extent_buffer *buf); |
e089f05c | 1257 | int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
7bb86316 CM |
1258 | *root, u64 bytenr, u64 num_bytes, |
1259 | u64 root_objectid, u64 ref_generation, | |
1260 | u64 owner_objectid, u64 owner_offset, int pin); | |
ccd467d6 CM |
1261 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
1262 | struct btrfs_root *root, | |
d1310b2e | 1263 | struct extent_io_tree *unpin); |
b18c6685 CM |
1264 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
1265 | struct btrfs_root *root, | |
7bb86316 CM |
1266 | u64 bytenr, u64 num_bytes, |
1267 | u64 root_objectid, u64 ref_generation, | |
1268 | u64 owner, u64 owner_offset); | |
9078a3e1 CM |
1269 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
1270 | struct btrfs_root *root); | |
1271 | int btrfs_free_block_groups(struct btrfs_fs_info *info); | |
1272 | int btrfs_read_block_groups(struct btrfs_root *root); | |
0b86a832 CM |
1273 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
1274 | struct btrfs_root *root, u64 bytes_used, | |
1275 | u64 type, u64 chunk_tree, u64 chunk_objectid, | |
1276 | u64 size); | |
dee26a9f | 1277 | /* ctree.c */ |
0b86a832 CM |
1278 | int btrfs_previous_item(struct btrfs_root *root, |
1279 | struct btrfs_path *path, u64 min_objectid, | |
1280 | int type); | |
5f39d397 CM |
1281 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
1282 | struct btrfs_root *root, struct extent_buffer *buf, | |
1283 | struct extent_buffer *parent, int parent_slot, | |
1284 | struct extent_buffer **cow_ret); | |
be20aa9d CM |
1285 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
1286 | struct btrfs_root *root, | |
1287 | struct extent_buffer *buf, | |
1288 | struct extent_buffer **cow_ret, u64 new_root_objectid); | |
6567e837 CM |
1289 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
1290 | *root, struct btrfs_path *path, u32 data_size); | |
b18c6685 CM |
1291 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
1292 | struct btrfs_root *root, | |
1293 | struct btrfs_path *path, | |
179e29e4 | 1294 | u32 new_size, int from_end); |
e089f05c CM |
1295 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
1296 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
1297 | ins_len, int cow); | |
6702ed49 | 1298 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
5f39d397 | 1299 | struct btrfs_root *root, struct extent_buffer *parent, |
a6b6e75e CM |
1300 | int start_slot, int cache_only, u64 *last_ret, |
1301 | struct btrfs_key *progress); | |
234b63a0 | 1302 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
2c90e5d6 CM |
1303 | struct btrfs_path *btrfs_alloc_path(void); |
1304 | void btrfs_free_path(struct btrfs_path *p); | |
234b63a0 | 1305 | void btrfs_init_path(struct btrfs_path *p); |
85e21bac CM |
1306 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
1307 | struct btrfs_path *path, int slot, int nr); | |
1308 | ||
1309 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, | |
1310 | struct btrfs_root *root, | |
1311 | struct btrfs_path *path) | |
1312 | { | |
1313 | return btrfs_del_items(trans, root, path, path->slots[0], 1); | |
1314 | } | |
1315 | ||
e089f05c CM |
1316 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
1317 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
9c58309d CM |
1318 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
1319 | struct btrfs_root *root, | |
1320 | struct btrfs_path *path, | |
1321 | struct btrfs_key *cpu_key, u32 *data_size, int nr); | |
1322 | ||
1323 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, | |
1324 | struct btrfs_root *root, | |
1325 | struct btrfs_path *path, | |
1326 | struct btrfs_key *key, | |
1327 | u32 data_size) | |
1328 | { | |
1329 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); | |
1330 | } | |
1331 | ||
234b63a0 | 1332 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
7bb86316 | 1333 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
5f39d397 | 1334 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
e089f05c | 1335 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
9f3a7427 | 1336 | *root); |
dee26a9f | 1337 | /* root-item.c */ |
e089f05c CM |
1338 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
1339 | struct btrfs_key *key); | |
1340 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
1341 | *root, struct btrfs_key *key, struct btrfs_root_item | |
1342 | *item); | |
1343 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
1344 | *root, struct btrfs_key *key, struct btrfs_root_item | |
1345 | *item); | |
1346 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct | |
1347 | btrfs_root_item *item, struct btrfs_key *key); | |
5ce14bbc CM |
1348 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid, |
1349 | struct btrfs_root *latest_root); | |
dee26a9f | 1350 | /* dir-item.c */ |
e089f05c | 1351 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
1352 | *root, const char *name, int name_len, u64 dir, |
1353 | struct btrfs_key *location, u8 type); | |
7e38180e CM |
1354 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
1355 | struct btrfs_root *root, | |
1356 | struct btrfs_path *path, u64 dir, | |
1357 | const char *name, int name_len, | |
1358 | int mod); | |
1359 | struct btrfs_dir_item * | |
1360 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | |
1361 | struct btrfs_root *root, | |
1362 | struct btrfs_path *path, u64 dir, | |
1363 | u64 objectid, const char *name, int name_len, | |
1364 | int mod); | |
1365 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, | |
1366 | struct btrfs_path *path, | |
7f5c1516 | 1367 | const char *name, int name_len); |
7e38180e CM |
1368 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
1369 | struct btrfs_root *root, | |
1370 | struct btrfs_path *path, | |
1371 | struct btrfs_dir_item *di); | |
5103e947 JB |
1372 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
1373 | struct btrfs_root *root, const char *name, | |
1374 | u16 name_len, const void *data, u16 data_len, | |
1375 | u64 dir); | |
1376 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, | |
1377 | struct btrfs_root *root, | |
1378 | struct btrfs_path *path, u64 dir, | |
1379 | const char *name, u16 name_len, | |
1380 | int mod); | |
dee26a9f | 1381 | /* inode-map.c */ |
9f5fae2f CM |
1382 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
1383 | struct btrfs_root *fs_root, | |
1384 | u64 dirid, u64 *objectid); | |
5be6f7f1 CM |
1385 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
1386 | ||
dee26a9f | 1387 | /* inode-item.c */ |
3954401f CM |
1388 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
1389 | struct btrfs_root *root, | |
1390 | const char *name, int name_len, | |
1391 | u64 inode_objectid, u64 ref_objectid); | |
1392 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, | |
1393 | struct btrfs_root *root, | |
1394 | const char *name, int name_len, | |
1395 | u64 inode_objectid, u64 ref_objectid); | |
5f39d397 CM |
1396 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
1397 | struct btrfs_root *root, | |
1398 | struct btrfs_path *path, u64 objectid); | |
293ffd5f | 1399 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
1400 | *root, struct btrfs_path *path, |
1401 | struct btrfs_key *location, int mod); | |
dee26a9f CM |
1402 | |
1403 | /* file-item.c */ | |
b18c6685 | 1404 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
dee26a9f | 1405 | struct btrfs_root *root, |
b18c6685 | 1406 | u64 objectid, u64 pos, u64 offset, |
db94535d CM |
1407 | u64 disk_num_bytes, |
1408 | u64 num_bytes); | |
dee26a9f CM |
1409 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
1410 | struct btrfs_root *root, | |
1411 | struct btrfs_path *path, u64 objectid, | |
db94535d | 1412 | u64 bytenr, int mod); |
065631f6 CM |
1413 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
1414 | struct btrfs_root *root, struct inode *inode, | |
1415 | struct bio *bio); | |
b18c6685 CM |
1416 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
1417 | struct btrfs_root *root, | |
1418 | struct btrfs_path *path, | |
1419 | u64 objectid, u64 offset, | |
1420 | int cow); | |
1de037a4 CM |
1421 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
1422 | struct btrfs_root *root, struct btrfs_path *path, | |
1423 | u64 isize); | |
39279cc3 | 1424 | /* inode.c */ |
9069218d CM |
1425 | static inline void dec_i_blocks(struct inode *inode, u64 dec) |
1426 | { | |
1427 | dec = dec >> 9; | |
1428 | if (dec <= inode->i_blocks) | |
1429 | inode->i_blocks -= dec; | |
1430 | else | |
1431 | inode->i_blocks = 0; | |
1432 | } | |
1433 | ||
edbd8d4e CM |
1434 | unsigned long btrfs_force_ra(struct address_space *mapping, |
1435 | struct file_ra_state *ra, struct file *file, | |
1436 | pgoff_t offset, pgoff_t last_index); | |
1832a6d5 CM |
1437 | int btrfs_check_free_space(struct btrfs_root *root, u64 num_required, |
1438 | int for_del); | |
9ebefb18 CM |
1439 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page); |
1440 | int btrfs_readpage(struct file *file, struct page *page); | |
39279cc3 | 1441 | void btrfs_delete_inode(struct inode *inode); |
2da98f00 | 1442 | void btrfs_put_inode(struct inode *inode); |
39279cc3 CM |
1443 | void btrfs_read_locked_inode(struct inode *inode); |
1444 | int btrfs_write_inode(struct inode *inode, int wait); | |
1445 | void btrfs_dirty_inode(struct inode *inode); | |
1446 | struct inode *btrfs_alloc_inode(struct super_block *sb); | |
1447 | void btrfs_destroy_inode(struct inode *inode); | |
1448 | int btrfs_init_cachep(void); | |
1449 | void btrfs_destroy_cachep(void); | |
34287aa3 | 1450 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
39279cc3 CM |
1451 | struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid, |
1452 | struct btrfs_root *root); | |
dc17ff8f CM |
1453 | struct inode *btrfs_ilookup(struct super_block *s, u64 objectid, |
1454 | u64 root_objectid); | |
39279cc3 CM |
1455 | int btrfs_commit_write(struct file *file, struct page *page, |
1456 | unsigned from, unsigned to); | |
a52d9a80 CM |
1457 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
1458 | size_t page_offset, u64 start, u64 end, | |
1459 | int create); | |
1460 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
1461 | struct btrfs_root *root, | |
1462 | struct inode *inode); | |
39279cc3 | 1463 | /* file.c */ |
a52d9a80 | 1464 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end); |
5f56406a | 1465 | int btrfs_check_file(struct btrfs_root *root, struct inode *inode); |
39279cc3 CM |
1466 | extern struct file_operations btrfs_file_operations; |
1467 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, | |
1468 | struct btrfs_root *root, struct inode *inode, | |
00f5c795 | 1469 | u64 start, u64 end, u64 inline_limit, u64 *hint_block); |
6702ed49 CM |
1470 | /* tree-defrag.c */ |
1471 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | |
1472 | struct btrfs_root *root, int cache_only); | |
58176a96 JB |
1473 | |
1474 | /* sysfs.c */ | |
1475 | int btrfs_init_sysfs(void); | |
1476 | void btrfs_exit_sysfs(void); | |
1477 | int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); | |
1478 | int btrfs_sysfs_add_root(struct btrfs_root *root); | |
1479 | void btrfs_sysfs_del_root(struct btrfs_root *root); | |
1480 | void btrfs_sysfs_del_super(struct btrfs_fs_info *root); | |
1481 | ||
5103e947 JB |
1482 | /* xattr.c */ |
1483 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
1484 | int btrfs_delete_xattrs(struct btrfs_trans_handle *trans, | |
1485 | struct btrfs_root *root, struct inode *inode); | |
edbd8d4e CM |
1486 | /* super.c */ |
1487 | u64 btrfs_parse_size(char *str); | |
eb60ceac | 1488 | #endif |