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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> |
58176a96 | 26 | #include <linux/completion.h> |
04160088 | 27 | #include <linux/backing-dev.h> |
e6dcd2dc | 28 | #include <linux/wait.h> |
479965d6 | 29 | #include <asm/kmap_types.h> |
d1310b2e | 30 | #include "extent_io.h" |
5f39d397 | 31 | #include "extent_map.h" |
8b712842 | 32 | #include "async-thread.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; |
e6dcd2dc | 40 | struct btrfs_ordered_sum; |
e089f05c | 41 | |
2a7108ad | 42 | #define BTRFS_MAGIC "_BHRfS_M" |
eb60ceac | 43 | |
4008c04a | 44 | #define BTRFS_MAX_LEVEL 8 |
0b86a832 | 45 | |
5d4f98a2 YZ |
46 | #define BTRFS_COMPAT_EXTENT_TREE_V0 |
47 | ||
5a3f23d5 CM |
48 | /* |
49 | * files bigger than this get some pre-flushing when they are added | |
50 | * to the ordered operations list. That way we limit the total | |
51 | * work done by the commit | |
52 | */ | |
53 | #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024) | |
54 | ||
0b86a832 | 55 | /* holds pointers to all of the tree roots */ |
6407bf6d | 56 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
0b86a832 CM |
57 | |
58 | /* stores information about which extents are in use, and reference counts */ | |
0cf6c620 | 59 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
0b86a832 | 60 | |
0b86a832 CM |
61 | /* |
62 | * chunk tree stores translations from logical -> physical block numbering | |
63 | * the super block points to the chunk tree | |
64 | */ | |
e085def2 | 65 | #define BTRFS_CHUNK_TREE_OBJECTID 3ULL |
0b86a832 CM |
66 | |
67 | /* | |
68 | * stores information about which areas of a given device are in use. | |
69 | * one per device. The tree of tree roots points to the device tree | |
70 | */ | |
e085def2 CM |
71 | #define BTRFS_DEV_TREE_OBJECTID 4ULL |
72 | ||
73 | /* one per subvolume, storing files and directories */ | |
74 | #define BTRFS_FS_TREE_OBJECTID 5ULL | |
75 | ||
76 | /* directory objectid inside the root tree */ | |
77 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL | |
0b86a832 | 78 | |
d20f7043 CM |
79 | /* holds checksums of all the data extents */ |
80 | #define BTRFS_CSUM_TREE_OBJECTID 7ULL | |
81 | ||
7b128766 JB |
82 | /* orhpan objectid for tracking unlinked/truncated files */ |
83 | #define BTRFS_ORPHAN_OBJECTID -5ULL | |
84 | ||
e02119d5 CM |
85 | /* does write ahead logging to speed up fsyncs */ |
86 | #define BTRFS_TREE_LOG_OBJECTID -6ULL | |
87 | #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL | |
88 | ||
e4657689 ZY |
89 | /* for space balancing */ |
90 | #define BTRFS_TREE_RELOC_OBJECTID -8ULL | |
91 | #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL | |
92 | ||
d20f7043 CM |
93 | /* |
94 | * extent checksums all have this objectid | |
95 | * this allows them to share the logging tree | |
96 | * for fsyncs | |
97 | */ | |
98 | #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL | |
99 | ||
31840ae1 ZY |
100 | /* dummy objectid represents multiple objectids */ |
101 | #define BTRFS_MULTIPLE_OBJECTIDS -255ULL | |
102 | ||
0b86a832 | 103 | /* |
6527cdbe | 104 | * All files have objectids in this range. |
0b86a832 | 105 | */ |
f6dbff55 | 106 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
6527cdbe | 107 | #define BTRFS_LAST_FREE_OBJECTID -256ULL |
e17cade2 | 108 | #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL |
3768f368 | 109 | |
0b86a832 CM |
110 | |
111 | /* | |
112 | * the device items go into the chunk tree. The key is in the form | |
113 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] | |
114 | */ | |
115 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL | |
116 | ||
4df27c4d YZ |
117 | #define BTRFS_BTREE_INODE_OBJECTID 1 |
118 | ||
119 | #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2 | |
120 | ||
e20d96d6 CM |
121 | /* |
122 | * we can actually store much bigger names, but lets not confuse the rest | |
123 | * of linux | |
124 | */ | |
125 | #define BTRFS_NAME_LEN 255 | |
126 | ||
f254e52c CM |
127 | /* 32 bytes in various csum fields */ |
128 | #define BTRFS_CSUM_SIZE 32 | |
607d432d JB |
129 | |
130 | /* csum types */ | |
131 | #define BTRFS_CSUM_TYPE_CRC32 0 | |
132 | ||
133 | static int btrfs_csum_sizes[] = { 4, 0 }; | |
134 | ||
509659cd | 135 | /* four bytes for CRC32 */ |
3954401f | 136 | #define BTRFS_EMPTY_DIR_SIZE 0 |
f254e52c | 137 | |
fabb5681 CM |
138 | #define BTRFS_FT_UNKNOWN 0 |
139 | #define BTRFS_FT_REG_FILE 1 | |
140 | #define BTRFS_FT_DIR 2 | |
141 | #define BTRFS_FT_CHRDEV 3 | |
142 | #define BTRFS_FT_BLKDEV 4 | |
143 | #define BTRFS_FT_FIFO 5 | |
144 | #define BTRFS_FT_SOCK 6 | |
145 | #define BTRFS_FT_SYMLINK 7 | |
5103e947 JB |
146 | #define BTRFS_FT_XATTR 8 |
147 | #define BTRFS_FT_MAX 9 | |
fabb5681 | 148 | |
fec577fb | 149 | /* |
d4a78947 WF |
150 | * The key defines the order in the tree, and so it also defines (optimal) |
151 | * block layout. | |
152 | * | |
153 | * objectid corresponds to the inode number. | |
154 | * | |
155 | * type tells us things about the object, and is a kind of stream selector. | |
156 | * so for a given inode, keys with type of 1 might refer to the inode data, | |
157 | * type of 2 may point to file data in the btree and type == 3 may point to | |
158 | * extents. | |
fec577fb CM |
159 | * |
160 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
161 | * |
162 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
163 | * in cpu native order. Otherwise they are identical and their sizes | |
164 | * should be the same (ie both packed) | |
fec577fb | 165 | */ |
e2fa7227 CM |
166 | struct btrfs_disk_key { |
167 | __le64 objectid; | |
5f39d397 | 168 | u8 type; |
70b2befd | 169 | __le64 offset; |
e2fa7227 CM |
170 | } __attribute__ ((__packed__)); |
171 | ||
172 | struct btrfs_key { | |
eb60ceac | 173 | u64 objectid; |
5f39d397 | 174 | u8 type; |
70b2befd | 175 | u64 offset; |
eb60ceac CM |
176 | } __attribute__ ((__packed__)); |
177 | ||
0b86a832 CM |
178 | struct btrfs_mapping_tree { |
179 | struct extent_map_tree map_tree; | |
180 | }; | |
181 | ||
e17cade2 | 182 | #define BTRFS_UUID_SIZE 16 |
0b86a832 CM |
183 | struct btrfs_dev_item { |
184 | /* the internal btrfs device id */ | |
185 | __le64 devid; | |
186 | ||
187 | /* size of the device */ | |
188 | __le64 total_bytes; | |
189 | ||
190 | /* bytes used */ | |
191 | __le64 bytes_used; | |
192 | ||
193 | /* optimal io alignment for this device */ | |
194 | __le32 io_align; | |
195 | ||
196 | /* optimal io width for this device */ | |
197 | __le32 io_width; | |
198 | ||
199 | /* minimal io size for this device */ | |
200 | __le32 sector_size; | |
201 | ||
0b86a832 CM |
202 | /* type and info about this device */ |
203 | __le64 type; | |
204 | ||
2b82032c YZ |
205 | /* expected generation for this device */ |
206 | __le64 generation; | |
207 | ||
c3027eb5 CM |
208 | /* |
209 | * starting byte of this partition on the device, | |
d4a78947 | 210 | * to allow for stripe alignment in the future |
c3027eb5 CM |
211 | */ |
212 | __le64 start_offset; | |
213 | ||
e17cade2 CM |
214 | /* grouping information for allocation decisions */ |
215 | __le32 dev_group; | |
216 | ||
217 | /* seek speed 0-100 where 100 is fastest */ | |
218 | u8 seek_speed; | |
219 | ||
220 | /* bandwidth 0-100 where 100 is fastest */ | |
221 | u8 bandwidth; | |
222 | ||
0d81ba5d | 223 | /* btrfs generated uuid for this device */ |
e17cade2 | 224 | u8 uuid[BTRFS_UUID_SIZE]; |
2b82032c YZ |
225 | |
226 | /* uuid of FS who owns this device */ | |
227 | u8 fsid[BTRFS_UUID_SIZE]; | |
0b86a832 CM |
228 | } __attribute__ ((__packed__)); |
229 | ||
230 | struct btrfs_stripe { | |
231 | __le64 devid; | |
232 | __le64 offset; | |
e17cade2 | 233 | u8 dev_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
234 | } __attribute__ ((__packed__)); |
235 | ||
236 | struct btrfs_chunk { | |
e17cade2 CM |
237 | /* size of this chunk in bytes */ |
238 | __le64 length; | |
239 | ||
240 | /* objectid of the root referencing this chunk */ | |
0b86a832 | 241 | __le64 owner; |
e17cade2 | 242 | |
0b86a832 CM |
243 | __le64 stripe_len; |
244 | __le64 type; | |
245 | ||
246 | /* optimal io alignment for this chunk */ | |
247 | __le32 io_align; | |
248 | ||
249 | /* optimal io width for this chunk */ | |
250 | __le32 io_width; | |
251 | ||
252 | /* minimal io size for this chunk */ | |
253 | __le32 sector_size; | |
254 | ||
255 | /* 2^16 stripes is quite a lot, a second limit is the size of a single | |
256 | * item in the btree | |
257 | */ | |
258 | __le16 num_stripes; | |
321aecc6 CM |
259 | |
260 | /* sub stripes only matter for raid10 */ | |
261 | __le16 sub_stripes; | |
0b86a832 CM |
262 | struct btrfs_stripe stripe; |
263 | /* additional stripes go here */ | |
264 | } __attribute__ ((__packed__)); | |
265 | ||
266 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) | |
267 | { | |
268 | BUG_ON(num_stripes == 0); | |
269 | return sizeof(struct btrfs_chunk) + | |
270 | sizeof(struct btrfs_stripe) * (num_stripes - 1); | |
271 | } | |
272 | ||
5f39d397 | 273 | #define BTRFS_FSID_SIZE 16 |
5d4f98a2 YZ |
274 | #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) |
275 | #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) | |
276 | #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32) | |
277 | #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33) | |
278 | ||
279 | #define BTRFS_BACKREF_REV_MAX 256 | |
280 | #define BTRFS_BACKREF_REV_SHIFT 56 | |
281 | #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ | |
282 | BTRFS_BACKREF_REV_SHIFT) | |
283 | ||
284 | #define BTRFS_OLD_BACKREF_REV 0 | |
285 | #define BTRFS_MIXED_BACKREF_REV 1 | |
63b10fc4 | 286 | |
fec577fb CM |
287 | /* |
288 | * every tree block (leaf or node) starts with this header. | |
289 | */ | |
bb492bb0 | 290 | struct btrfs_header { |
e17cade2 | 291 | /* these first four must match the super block */ |
f254e52c | 292 | u8 csum[BTRFS_CSUM_SIZE]; |
5f39d397 | 293 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 294 | __le64 bytenr; /* which block this node is supposed to live in */ |
63b10fc4 | 295 | __le64 flags; |
e17cade2 CM |
296 | |
297 | /* allowed to be different from the super from here on down */ | |
298 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; | |
7f5c1516 | 299 | __le64 generation; |
4d775673 | 300 | __le64 owner; |
5f39d397 | 301 | __le32 nritems; |
9a6f11ed | 302 | u8 level; |
eb60ceac CM |
303 | } __attribute__ ((__packed__)); |
304 | ||
5f39d397 | 305 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
d397712b CM |
306 | sizeof(struct btrfs_header)) / \ |
307 | sizeof(struct btrfs_key_ptr)) | |
123abc88 | 308 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
5f39d397 | 309 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
236454df CM |
310 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
311 | sizeof(struct btrfs_item) - \ | |
312 | sizeof(struct btrfs_file_extent_item)) | |
eb60ceac | 313 | |
0b86a832 CM |
314 | |
315 | /* | |
316 | * this is a very generous portion of the super block, giving us | |
317 | * room to translate 14 chunks with 3 stripes each. | |
318 | */ | |
319 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 | |
7ae9c09d | 320 | #define BTRFS_LABEL_SIZE 256 |
0b86a832 | 321 | |
fec577fb CM |
322 | /* |
323 | * the super block basically lists the main trees of the FS | |
324 | * it currently lacks any block count etc etc | |
325 | */ | |
234b63a0 | 326 | struct btrfs_super_block { |
f254e52c | 327 | u8 csum[BTRFS_CSUM_SIZE]; |
63b10fc4 | 328 | /* the first 4 fields must match struct btrfs_header */ |
2b82032c | 329 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 330 | __le64 bytenr; /* this block number */ |
63b10fc4 | 331 | __le64 flags; |
e17cade2 CM |
332 | |
333 | /* allowed to be different from the btrfs_header from here own down */ | |
3768f368 | 334 | __le64 magic; |
3768f368 CM |
335 | __le64 generation; |
336 | __le64 root; | |
0b86a832 | 337 | __le64 chunk_root; |
e02119d5 | 338 | __le64 log_root; |
c3027eb5 CM |
339 | |
340 | /* this will help find the new super based on the log root */ | |
341 | __le64 log_root_transid; | |
db94535d CM |
342 | __le64 total_bytes; |
343 | __le64 bytes_used; | |
2e635a27 | 344 | __le64 root_dir_objectid; |
8a4b83cc | 345 | __le64 num_devices; |
5f39d397 CM |
346 | __le32 sectorsize; |
347 | __le32 nodesize; | |
348 | __le32 leafsize; | |
87ee04eb | 349 | __le32 stripesize; |
0b86a832 | 350 | __le32 sys_chunk_array_size; |
84234f3a | 351 | __le64 chunk_root_generation; |
f2b636e8 JB |
352 | __le64 compat_flags; |
353 | __le64 compat_ro_flags; | |
354 | __le64 incompat_flags; | |
607d432d | 355 | __le16 csum_type; |
db94535d | 356 | u8 root_level; |
0b86a832 | 357 | u8 chunk_root_level; |
e02119d5 | 358 | u8 log_root_level; |
0d81ba5d | 359 | struct btrfs_dev_item dev_item; |
c3027eb5 | 360 | |
7ae9c09d | 361 | char label[BTRFS_LABEL_SIZE]; |
c3027eb5 CM |
362 | |
363 | /* future expansion */ | |
364 | __le64 reserved[32]; | |
0b86a832 | 365 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
cfaa7295 CM |
366 | } __attribute__ ((__packed__)); |
367 | ||
f2b636e8 JB |
368 | /* |
369 | * Compat flags that we support. If any incompat flags are set other than the | |
370 | * ones specified below then we will fail to mount | |
371 | */ | |
5d4f98a2 YZ |
372 | #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) |
373 | ||
374 | #define BTRFS_FEATURE_COMPAT_SUPP 0ULL | |
375 | #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL | |
376 | #define BTRFS_FEATURE_INCOMPAT_SUPP \ | |
377 | BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | |
f2b636e8 | 378 | |
fec577fb | 379 | /* |
62e2749e | 380 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
381 | * the item in the leaf (relative to the start of the data area) |
382 | */ | |
0783fcfc | 383 | struct btrfs_item { |
e2fa7227 | 384 | struct btrfs_disk_key key; |
123abc88 | 385 | __le32 offset; |
5f39d397 | 386 | __le32 size; |
eb60ceac CM |
387 | } __attribute__ ((__packed__)); |
388 | ||
fec577fb CM |
389 | /* |
390 | * leaves have an item area and a data area: | |
391 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
392 | * | |
393 | * The data is separate from the items to get the keys closer together | |
394 | * during searches. | |
395 | */ | |
234b63a0 | 396 | struct btrfs_leaf { |
bb492bb0 | 397 | struct btrfs_header header; |
123abc88 | 398 | struct btrfs_item items[]; |
eb60ceac CM |
399 | } __attribute__ ((__packed__)); |
400 | ||
fec577fb CM |
401 | /* |
402 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
403 | * other blocks | |
404 | */ | |
123abc88 CM |
405 | struct btrfs_key_ptr { |
406 | struct btrfs_disk_key key; | |
407 | __le64 blockptr; | |
74493f7a | 408 | __le64 generation; |
123abc88 CM |
409 | } __attribute__ ((__packed__)); |
410 | ||
234b63a0 | 411 | struct btrfs_node { |
bb492bb0 | 412 | struct btrfs_header header; |
123abc88 | 413 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
414 | } __attribute__ ((__packed__)); |
415 | ||
fec577fb | 416 | /* |
234b63a0 CM |
417 | * btrfs_paths remember the path taken from the root down to the leaf. |
418 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
419 | * to any other levels that are present. |
420 | * | |
421 | * The slots array records the index of the item or block pointer | |
422 | * used while walking the tree. | |
423 | */ | |
234b63a0 | 424 | struct btrfs_path { |
5f39d397 | 425 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
234b63a0 | 426 | int slots[BTRFS_MAX_LEVEL]; |
925baedd CM |
427 | /* if there is real range locking, this locks field will change */ |
428 | int locks[BTRFS_MAX_LEVEL]; | |
3c69faec | 429 | int reada; |
925baedd | 430 | /* keep some upper locks as we walk down */ |
6702ed49 | 431 | int lowest_level; |
459931ec CM |
432 | |
433 | /* | |
434 | * set by btrfs_split_item, tells search_slot to keep all locks | |
435 | * and to force calls to keep space in the nodes | |
436 | */ | |
b9473439 CM |
437 | unsigned int search_for_split:1; |
438 | unsigned int keep_locks:1; | |
439 | unsigned int skip_locking:1; | |
440 | unsigned int leave_spinning:1; | |
5d4f98a2 | 441 | unsigned int search_commit_root:1; |
eb60ceac | 442 | }; |
5de08d7d | 443 | |
62e2749e CM |
444 | /* |
445 | * items in the extent btree are used to record the objectid of the | |
446 | * owner of the block and the number of references | |
447 | */ | |
5d4f98a2 | 448 | |
62e2749e | 449 | struct btrfs_extent_item { |
5d4f98a2 YZ |
450 | __le64 refs; |
451 | __le64 generation; | |
452 | __le64 flags; | |
453 | } __attribute__ ((__packed__)); | |
454 | ||
455 | struct btrfs_extent_item_v0 { | |
62e2749e | 456 | __le32 refs; |
74493f7a CM |
457 | } __attribute__ ((__packed__)); |
458 | ||
5d4f98a2 YZ |
459 | #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \ |
460 | sizeof(struct btrfs_item)) | |
461 | ||
462 | #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0) | |
463 | #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1) | |
464 | ||
465 | /* following flags only apply to tree blocks */ | |
466 | ||
467 | /* use full backrefs for extent pointers in the block */ | |
468 | #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8) | |
469 | ||
470 | struct btrfs_tree_block_info { | |
471 | struct btrfs_disk_key key; | |
472 | u8 level; | |
473 | } __attribute__ ((__packed__)); | |
474 | ||
475 | struct btrfs_extent_data_ref { | |
476 | __le64 root; | |
477 | __le64 objectid; | |
478 | __le64 offset; | |
479 | __le32 count; | |
480 | } __attribute__ ((__packed__)); | |
481 | ||
482 | struct btrfs_shared_data_ref { | |
483 | __le32 count; | |
484 | } __attribute__ ((__packed__)); | |
485 | ||
486 | struct btrfs_extent_inline_ref { | |
487 | u8 type; | |
1bec1aed | 488 | __le64 offset; |
5d4f98a2 YZ |
489 | } __attribute__ ((__packed__)); |
490 | ||
491 | /* old style backrefs item */ | |
492 | struct btrfs_extent_ref_v0 { | |
74493f7a CM |
493 | __le64 root; |
494 | __le64 generation; | |
495 | __le64 objectid; | |
5d4f98a2 | 496 | __le32 count; |
62e2749e CM |
497 | } __attribute__ ((__packed__)); |
498 | ||
5d4f98a2 | 499 | |
0b86a832 CM |
500 | /* dev extents record free space on individual devices. The owner |
501 | * field points back to the chunk allocation mapping tree that allocated | |
e17cade2 | 502 | * the extent. The chunk tree uuid field is a way to double check the owner |
0b86a832 CM |
503 | */ |
504 | struct btrfs_dev_extent { | |
e17cade2 CM |
505 | __le64 chunk_tree; |
506 | __le64 chunk_objectid; | |
507 | __le64 chunk_offset; | |
0b86a832 | 508 | __le64 length; |
e17cade2 | 509 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
510 | } __attribute__ ((__packed__)); |
511 | ||
3954401f | 512 | struct btrfs_inode_ref { |
aec7477b | 513 | __le64 index; |
3954401f CM |
514 | __le16 name_len; |
515 | /* name goes here */ | |
516 | } __attribute__ ((__packed__)); | |
517 | ||
0b86a832 | 518 | struct btrfs_timespec { |
f254e52c | 519 | __le64 sec; |
1e1d2701 CM |
520 | __le32 nsec; |
521 | } __attribute__ ((__packed__)); | |
522 | ||
95029d7d | 523 | enum btrfs_compression_type { |
c8b97818 CM |
524 | BTRFS_COMPRESS_NONE = 0, |
525 | BTRFS_COMPRESS_ZLIB = 1, | |
526 | BTRFS_COMPRESS_LAST = 2, | |
95029d7d | 527 | }; |
c8b97818 | 528 | |
1e1d2701 | 529 | struct btrfs_inode_item { |
e02119d5 | 530 | /* nfs style generation number */ |
1e1d2701 | 531 | __le64 generation; |
e02119d5 CM |
532 | /* transid that last touched this inode */ |
533 | __le64 transid; | |
1e1d2701 | 534 | __le64 size; |
a76a3cd4 | 535 | __le64 nbytes; |
31f3c99b | 536 | __le64 block_group; |
1e1d2701 CM |
537 | __le32 nlink; |
538 | __le32 uid; | |
539 | __le32 gid; | |
540 | __le32 mode; | |
0b86a832 | 541 | __le64 rdev; |
f2b636e8 | 542 | __le64 flags; |
c8b97818 | 543 | |
c3027eb5 CM |
544 | /* modification sequence number for NFS */ |
545 | __le64 sequence; | |
546 | ||
547 | /* | |
548 | * a little future expansion, for more than this we can | |
549 | * just grow the inode item and version it | |
550 | */ | |
551 | __le64 reserved[4]; | |
0b86a832 CM |
552 | struct btrfs_timespec atime; |
553 | struct btrfs_timespec ctime; | |
554 | struct btrfs_timespec mtime; | |
555 | struct btrfs_timespec otime; | |
1e1d2701 CM |
556 | } __attribute__ ((__packed__)); |
557 | ||
e02119d5 CM |
558 | struct btrfs_dir_log_item { |
559 | __le64 end; | |
560 | } __attribute__ ((__packed__)); | |
561 | ||
62e2749e | 562 | struct btrfs_dir_item { |
d6e4a428 | 563 | struct btrfs_disk_key location; |
e02119d5 | 564 | __le64 transid; |
5103e947 | 565 | __le16 data_len; |
a8a2ee0c | 566 | __le16 name_len; |
62e2749e CM |
567 | u8 type; |
568 | } __attribute__ ((__packed__)); | |
569 | ||
570 | struct btrfs_root_item { | |
d6e4a428 | 571 | struct btrfs_inode_item inode; |
84234f3a | 572 | __le64 generation; |
d6e4a428 | 573 | __le64 root_dirid; |
db94535d CM |
574 | __le64 bytenr; |
575 | __le64 byte_limit; | |
576 | __le64 bytes_used; | |
80ff3856 | 577 | __le64 last_snapshot; |
f2b636e8 | 578 | __le64 flags; |
62e2749e | 579 | __le32 refs; |
5eda7b5e CM |
580 | struct btrfs_disk_key drop_progress; |
581 | u8 drop_level; | |
db94535d | 582 | u8 level; |
9f5fae2f | 583 | } __attribute__ ((__packed__)); |
62e2749e | 584 | |
0660b5af CM |
585 | /* |
586 | * this is used for both forward and backward root refs | |
587 | */ | |
588 | struct btrfs_root_ref { | |
589 | __le64 dirid; | |
590 | __le64 sequence; | |
591 | __le16 name_len; | |
592 | } __attribute__ ((__packed__)); | |
593 | ||
d899e052 YZ |
594 | #define BTRFS_FILE_EXTENT_INLINE 0 |
595 | #define BTRFS_FILE_EXTENT_REG 1 | |
596 | #define BTRFS_FILE_EXTENT_PREALLOC 2 | |
236454df | 597 | |
9f5fae2f | 598 | struct btrfs_file_extent_item { |
c8b97818 CM |
599 | /* |
600 | * transaction id that created this extent | |
601 | */ | |
71951f35 | 602 | __le64 generation; |
c8b97818 CM |
603 | /* |
604 | * max number of bytes to hold this extent in ram | |
605 | * when we split a compressed extent we can't know how big | |
606 | * each of the resulting pieces will be. So, this is | |
607 | * an upper limit on the size of the extent in ram instead of | |
608 | * an exact limit. | |
609 | */ | |
610 | __le64 ram_bytes; | |
611 | ||
612 | /* | |
613 | * 32 bits for the various ways we might encode the data, | |
614 | * including compression and encryption. If any of these | |
615 | * are set to something a given disk format doesn't understand | |
616 | * it is treated like an incompat flag for reading and writing, | |
617 | * but not for stat. | |
618 | */ | |
619 | u8 compression; | |
620 | u8 encryption; | |
621 | __le16 other_encoding; /* spare for later use */ | |
622 | ||
623 | /* are we inline data or a real extent? */ | |
236454df | 624 | u8 type; |
c8b97818 | 625 | |
9f5fae2f CM |
626 | /* |
627 | * disk space consumed by the extent, checksum blocks are included | |
628 | * in these numbers | |
629 | */ | |
db94535d CM |
630 | __le64 disk_bytenr; |
631 | __le64 disk_num_bytes; | |
9f5fae2f | 632 | /* |
dee26a9f | 633 | * the logical offset in file blocks (no csums) |
9f5fae2f CM |
634 | * this extent record is for. This allows a file extent to point |
635 | * into the middle of an existing extent on disk, sharing it | |
636 | * between two snapshots (useful if some bytes in the middle of the | |
637 | * extent have changed | |
638 | */ | |
639 | __le64 offset; | |
640 | /* | |
c8b97818 CM |
641 | * the logical number of file blocks (no csums included). This |
642 | * always reflects the size uncompressed and without encoding. | |
9f5fae2f | 643 | */ |
db94535d | 644 | __le64 num_bytes; |
c8b97818 | 645 | |
9f5fae2f CM |
646 | } __attribute__ ((__packed__)); |
647 | ||
f254e52c | 648 | struct btrfs_csum_item { |
509659cd | 649 | u8 csum; |
f254e52c CM |
650 | } __attribute__ ((__packed__)); |
651 | ||
0b86a832 CM |
652 | /* different types of block groups (and chunks) */ |
653 | #define BTRFS_BLOCK_GROUP_DATA (1 << 0) | |
654 | #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1) | |
655 | #define BTRFS_BLOCK_GROUP_METADATA (1 << 2) | |
593060d7 | 656 | #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3) |
8790d502 | 657 | #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4) |
611f0e00 | 658 | #define BTRFS_BLOCK_GROUP_DUP (1 << 5) |
321aecc6 | 659 | #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6) |
1e2677e0 | 660 | |
9078a3e1 CM |
661 | struct btrfs_block_group_item { |
662 | __le64 used; | |
0b86a832 CM |
663 | __le64 chunk_objectid; |
664 | __le64 flags; | |
9078a3e1 CM |
665 | } __attribute__ ((__packed__)); |
666 | ||
6324fbf3 CM |
667 | struct btrfs_space_info { |
668 | u64 flags; | |
6a63209f JB |
669 | |
670 | u64 total_bytes; /* total bytes in the space */ | |
671 | u64 bytes_used; /* total bytes used on disk */ | |
672 | u64 bytes_pinned; /* total bytes pinned, will be freed when the | |
673 | transaction finishes */ | |
674 | u64 bytes_reserved; /* total bytes the allocator has reserved for | |
675 | current allocations */ | |
676 | u64 bytes_readonly; /* total bytes that are read only */ | |
677 | ||
678 | /* delalloc accounting */ | |
679 | u64 bytes_delalloc; /* number of bytes reserved for allocation, | |
680 | this space is not necessarily reserved yet | |
681 | by the allocator */ | |
682 | u64 bytes_may_use; /* number of bytes that may be used for | |
683 | delalloc */ | |
684 | ||
685 | int full; /* indicates that we cannot allocate any more | |
686 | chunks for this space */ | |
687 | int force_alloc; /* set if we need to force a chunk alloc for | |
688 | this space */ | |
689 | ||
6324fbf3 | 690 | struct list_head list; |
0f9dd46c JB |
691 | |
692 | /* for block groups in our same type */ | |
693 | struct list_head block_groups; | |
694 | spinlock_t lock; | |
80eb234a | 695 | struct rw_semaphore groups_sem; |
817d52f8 | 696 | atomic_t caching_threads; |
0f9dd46c JB |
697 | }; |
698 | ||
fa9c0d79 CM |
699 | /* |
700 | * free clusters are used to claim free space in relatively large chunks, | |
701 | * allowing us to do less seeky writes. They are used for all metadata | |
702 | * allocations and data allocations in ssd mode. | |
703 | */ | |
704 | struct btrfs_free_cluster { | |
705 | spinlock_t lock; | |
706 | spinlock_t refill_lock; | |
707 | struct rb_root root; | |
708 | ||
709 | /* largest extent in this cluster */ | |
710 | u64 max_size; | |
711 | ||
712 | /* first extent starting offset */ | |
713 | u64 window_start; | |
714 | ||
96303081 JB |
715 | /* if this cluster simply points at a bitmap in the block group */ |
716 | bool points_to_bitmap; | |
717 | ||
fa9c0d79 CM |
718 | struct btrfs_block_group_cache *block_group; |
719 | /* | |
720 | * when a cluster is allocated from a block group, we put the | |
721 | * cluster onto a list in the block group so that it can | |
722 | * be freed before the block group is freed. | |
723 | */ | |
724 | struct list_head block_group_list; | |
6324fbf3 CM |
725 | }; |
726 | ||
817d52f8 JB |
727 | enum btrfs_caching_type { |
728 | BTRFS_CACHE_NO = 0, | |
729 | BTRFS_CACHE_STARTED = 1, | |
730 | BTRFS_CACHE_FINISHED = 2, | |
731 | }; | |
732 | ||
11833d66 YZ |
733 | struct btrfs_caching_control { |
734 | struct list_head list; | |
735 | struct mutex mutex; | |
736 | wait_queue_head_t wait; | |
737 | struct btrfs_block_group_cache *block_group; | |
738 | u64 progress; | |
739 | atomic_t count; | |
740 | }; | |
741 | ||
9078a3e1 CM |
742 | struct btrfs_block_group_cache { |
743 | struct btrfs_key key; | |
744 | struct btrfs_block_group_item item; | |
817d52f8 | 745 | struct btrfs_fs_info *fs_info; |
c286ac48 | 746 | spinlock_t lock; |
324ae4df | 747 | u64 pinned; |
e8569813 | 748 | u64 reserved; |
0b86a832 | 749 | u64 flags; |
96303081 JB |
750 | u64 sectorsize; |
751 | int extents_thresh; | |
752 | int free_extents; | |
753 | int total_bitmaps; | |
8f18cf13 | 754 | int ro; |
0f9dd46c JB |
755 | int dirty; |
756 | ||
817d52f8 | 757 | /* cache tracking stuff */ |
817d52f8 | 758 | int cached; |
11833d66 YZ |
759 | struct btrfs_caching_control *caching_ctl; |
760 | u64 last_byte_to_unpin; | |
817d52f8 | 761 | |
0f9dd46c JB |
762 | struct btrfs_space_info *space_info; |
763 | ||
764 | /* free space cache stuff */ | |
6226cb0a | 765 | spinlock_t tree_lock; |
0f9dd46c | 766 | struct rb_root free_space_offset; |
817d52f8 | 767 | u64 free_space; |
0f9dd46c JB |
768 | |
769 | /* block group cache stuff */ | |
770 | struct rb_node cache_node; | |
771 | ||
772 | /* for block groups in the same raid type */ | |
773 | struct list_head list; | |
d2fb3437 YZ |
774 | |
775 | /* usage count */ | |
776 | atomic_t count; | |
fa9c0d79 CM |
777 | |
778 | /* List of struct btrfs_free_clusters for this block group. | |
779 | * Today it will only have one thing on it, but that may change | |
780 | */ | |
781 | struct list_head cluster_list; | |
9078a3e1 | 782 | }; |
0b86a832 | 783 | |
5d4f98a2 | 784 | struct reloc_control; |
0b86a832 | 785 | struct btrfs_device; |
8a4b83cc | 786 | struct btrfs_fs_devices; |
9f5fae2f | 787 | struct btrfs_fs_info { |
5f39d397 | 788 | u8 fsid[BTRFS_FSID_SIZE]; |
e17cade2 | 789 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
62e2749e CM |
790 | struct btrfs_root *extent_root; |
791 | struct btrfs_root *tree_root; | |
0b86a832 CM |
792 | struct btrfs_root *chunk_root; |
793 | struct btrfs_root *dev_root; | |
3de4586c | 794 | struct btrfs_root *fs_root; |
d20f7043 | 795 | struct btrfs_root *csum_root; |
e02119d5 CM |
796 | |
797 | /* the log root tree is a directory of all the other log roots */ | |
798 | struct btrfs_root *log_root_tree; | |
4df27c4d YZ |
799 | |
800 | spinlock_t fs_roots_radix_lock; | |
0f7d52f4 | 801 | struct radix_tree_root fs_roots_radix; |
1a5bc167 | 802 | |
0f9dd46c JB |
803 | /* block group cache stuff */ |
804 | spinlock_t block_group_cache_lock; | |
805 | struct rb_root block_group_cache_tree; | |
806 | ||
11833d66 YZ |
807 | struct extent_io_tree freed_extents[2]; |
808 | struct extent_io_tree *pinned_extents; | |
1a5bc167 | 809 | |
0b86a832 CM |
810 | /* logical->physical extent mapping */ |
811 | struct btrfs_mapping_tree mapping_tree; | |
812 | ||
293ffd5f | 813 | u64 generation; |
15ee9bc7 | 814 | u64 last_trans_committed; |
12fcfd22 CM |
815 | |
816 | /* | |
817 | * this is updated to the current trans every time a full commit | |
818 | * is required instead of the faster short fsync log commits | |
819 | */ | |
820 | u64 last_trans_log_full_commit; | |
9ca9ee09 | 821 | u64 open_ioctl_trans; |
b6cda9bc | 822 | unsigned long mount_opt; |
c59f8951 | 823 | u64 max_extent; |
6f568d35 | 824 | u64 max_inline; |
8f662a76 | 825 | u64 alloc_start; |
79154b1b | 826 | struct btrfs_transaction *running_transaction; |
e6dcd2dc | 827 | wait_queue_head_t transaction_throttle; |
f9295749 | 828 | wait_queue_head_t transaction_wait; |
771ed689 | 829 | wait_queue_head_t async_submit_wait; |
e02119d5 | 830 | |
4b52dff6 | 831 | struct btrfs_super_block super_copy; |
a061fc8d | 832 | struct btrfs_super_block super_for_commit; |
0b86a832 | 833 | struct block_device *__bdev; |
e20d96d6 | 834 | struct super_block *sb; |
d98237b3 | 835 | struct inode *btree_inode; |
04160088 | 836 | struct backing_dev_info bdi; |
79154b1b | 837 | struct mutex trans_mutex; |
e02119d5 | 838 | struct mutex tree_log_mutex; |
a74a4b97 CM |
839 | struct mutex transaction_kthread_mutex; |
840 | struct mutex cleaner_mutex; | |
925baedd | 841 | struct mutex chunk_mutex; |
7d9eb12c | 842 | struct mutex volume_mutex; |
5a3f23d5 CM |
843 | /* |
844 | * this protects the ordered operations list only while we are | |
845 | * processing all of the entries on it. This way we make | |
846 | * sure the commit code doesn't find the list temporarily empty | |
847 | * because another function happens to be doing non-waiting preflush | |
848 | * before jumping into the main commit. | |
849 | */ | |
850 | struct mutex ordered_operations_mutex; | |
11833d66 | 851 | struct rw_semaphore extent_commit_sem; |
5a3f23d5 | 852 | |
76dda93c YZ |
853 | struct rw_semaphore subvol_sem; |
854 | ||
855 | struct srcu_struct subvol_srcu; | |
856 | ||
8fd17795 | 857 | struct list_head trans_list; |
19c00ddc | 858 | struct list_head hashers; |
facda1e7 | 859 | struct list_head dead_roots; |
11833d66 | 860 | struct list_head caching_block_groups; |
e02119d5 | 861 | |
cb03c743 | 862 | atomic_t nr_async_submits; |
8c8bee1d | 863 | atomic_t async_submit_draining; |
0986fe9e | 864 | atomic_t nr_async_bios; |
771ed689 | 865 | atomic_t async_delalloc_pages; |
ce9adaa5 | 866 | |
3eaa2885 CM |
867 | /* |
868 | * this is used by the balancing code to wait for all the pending | |
869 | * ordered extents | |
870 | */ | |
871 | spinlock_t ordered_extent_lock; | |
5a3f23d5 CM |
872 | |
873 | /* | |
874 | * all of the data=ordered extents pending writeback | |
875 | * these can span multiple transactions and basically include | |
876 | * every dirty data page that isn't from nodatacow | |
877 | */ | |
3eaa2885 | 878 | struct list_head ordered_extents; |
5a3f23d5 CM |
879 | |
880 | /* | |
881 | * all of the inodes that have delalloc bytes. It is possible for | |
882 | * this list to be empty even when there is still dirty data=ordered | |
883 | * extents waiting to finish IO. | |
884 | */ | |
ea8c2819 | 885 | struct list_head delalloc_inodes; |
3eaa2885 | 886 | |
5a3f23d5 CM |
887 | /* |
888 | * special rename and truncate targets that must be on disk before | |
889 | * we're allowed to commit. This is basically the ext3 style | |
890 | * data=ordered list. | |
891 | */ | |
892 | struct list_head ordered_operations; | |
893 | ||
8b712842 CM |
894 | /* |
895 | * there is a pool of worker threads for checksumming during writes | |
896 | * and a pool for checksumming after reads. This is because readers | |
897 | * can run with FS locks held, and the writers may be waiting for | |
898 | * those locks. We don't want ordering in the pending list to cause | |
899 | * deadlocks, and so the two are serviced separately. | |
1cc127b5 CM |
900 | * |
901 | * A third pool does submit_bio to avoid deadlocking with the other | |
902 | * two | |
8b712842 CM |
903 | */ |
904 | struct btrfs_workers workers; | |
771ed689 | 905 | struct btrfs_workers delalloc_workers; |
8b712842 | 906 | struct btrfs_workers endio_workers; |
d20f7043 | 907 | struct btrfs_workers endio_meta_workers; |
cad321ad | 908 | struct btrfs_workers endio_meta_write_workers; |
e6dcd2dc | 909 | struct btrfs_workers endio_write_workers; |
1cc127b5 | 910 | struct btrfs_workers submit_workers; |
247e743c CM |
911 | /* |
912 | * fixup workers take dirty pages that didn't properly go through | |
913 | * the cow mechanism and make them safe to write. It happens | |
914 | * for the sys_munmap function call path | |
915 | */ | |
916 | struct btrfs_workers fixup_workers; | |
a74a4b97 CM |
917 | struct task_struct *transaction_kthread; |
918 | struct task_struct *cleaner_kthread; | |
4543df7e | 919 | int thread_pool_size; |
8b712842 | 920 | |
58176a96 JB |
921 | struct kobject super_kobj; |
922 | struct completion kobj_unregister; | |
e66f709b | 923 | int do_barriers; |
facda1e7 | 924 | int closing; |
e02119d5 | 925 | int log_root_recovering; |
9f5fae2f | 926 | |
324ae4df | 927 | u64 total_pinned; |
b9473439 CM |
928 | |
929 | /* protected by the delalloc lock, used to keep from writing | |
930 | * metadata until there is a nice batch | |
931 | */ | |
932 | u64 dirty_metadata_bytes; | |
0b86a832 CM |
933 | struct list_head dirty_cowonly_roots; |
934 | ||
8a4b83cc | 935 | struct btrfs_fs_devices *fs_devices; |
4184ea7f CM |
936 | |
937 | /* | |
938 | * the space_info list is almost entirely read only. It only changes | |
939 | * when we add a new raid type to the FS, and that happens | |
940 | * very rarely. RCU is used to protect it. | |
941 | */ | |
6324fbf3 | 942 | struct list_head space_info; |
4184ea7f | 943 | |
5d4f98a2 YZ |
944 | struct reloc_control *reloc_ctl; |
945 | ||
1832a6d5 | 946 | spinlock_t delalloc_lock; |
cee36a03 | 947 | spinlock_t new_trans_lock; |
1832a6d5 | 948 | u64 delalloc_bytes; |
fa9c0d79 CM |
949 | |
950 | /* data_alloc_cluster is only used in ssd mode */ | |
951 | struct btrfs_free_cluster data_alloc_cluster; | |
952 | ||
953 | /* all metadata allocations go through this cluster */ | |
954 | struct btrfs_free_cluster meta_alloc_cluster; | |
d18a2c44 | 955 | |
31153d81 YZ |
956 | spinlock_t ref_cache_lock; |
957 | u64 total_ref_cache_size; | |
31153d81 | 958 | |
d18a2c44 CM |
959 | u64 avail_data_alloc_bits; |
960 | u64 avail_metadata_alloc_bits; | |
961 | u64 avail_system_alloc_bits; | |
962 | u64 data_alloc_profile; | |
963 | u64 metadata_alloc_profile; | |
964 | u64 system_alloc_profile; | |
788f20eb | 965 | |
97e728d4 JB |
966 | unsigned data_chunk_allocations; |
967 | unsigned metadata_ratio; | |
968 | ||
788f20eb | 969 | void *bdev_holder; |
324ae4df | 970 | }; |
0b86a832 | 971 | |
9f5fae2f CM |
972 | /* |
973 | * in ram representation of the tree. extent_root is used for all allocations | |
f2458e1d | 974 | * and for the extent tree extent_root root. |
9f5fae2f CM |
975 | */ |
976 | struct btrfs_root { | |
5f39d397 | 977 | struct extent_buffer *node; |
925baedd CM |
978 | |
979 | /* the node lock is held while changing the node pointer */ | |
980 | spinlock_t node_lock; | |
981 | ||
5f39d397 | 982 | struct extent_buffer *commit_root; |
e02119d5 | 983 | struct btrfs_root *log_root; |
1a40e23b | 984 | struct btrfs_root *reloc_root; |
31153d81 | 985 | |
62e2749e CM |
986 | struct btrfs_root_item root_item; |
987 | struct btrfs_key root_key; | |
9f5fae2f | 988 | struct btrfs_fs_info *fs_info; |
d0c803c4 CM |
989 | struct extent_io_tree dirty_log_pages; |
990 | ||
58176a96 JB |
991 | struct kobject root_kobj; |
992 | struct completion kobj_unregister; | |
a2135011 | 993 | struct mutex objectid_mutex; |
7237f183 | 994 | |
e02119d5 | 995 | struct mutex log_mutex; |
7237f183 YZ |
996 | wait_queue_head_t log_writer_wait; |
997 | wait_queue_head_t log_commit_wait[2]; | |
998 | atomic_t log_writers; | |
999 | atomic_t log_commit[2]; | |
1000 | unsigned long log_transid; | |
1001 | unsigned long log_batch; | |
ea8c2819 | 1002 | |
0f7d52f4 CM |
1003 | u64 objectid; |
1004 | u64 last_trans; | |
5f39d397 CM |
1005 | |
1006 | /* data allocations are done in sectorsize units */ | |
1007 | u32 sectorsize; | |
1008 | ||
1009 | /* node allocations are done in nodesize units */ | |
1010 | u32 nodesize; | |
1011 | ||
1012 | /* leaf allocations are done in leafsize units */ | |
1013 | u32 leafsize; | |
1014 | ||
87ee04eb CM |
1015 | u32 stripesize; |
1016 | ||
9f5fae2f | 1017 | u32 type; |
13a8a7c8 YZ |
1018 | |
1019 | u64 highest_objectid; | |
9f3a7427 | 1020 | int ref_cows; |
0b86a832 | 1021 | int track_dirty; |
4df27c4d YZ |
1022 | int in_radix; |
1023 | ||
3f157a2f | 1024 | u64 defrag_trans_start; |
6702ed49 | 1025 | struct btrfs_key defrag_progress; |
0ef3e66b | 1026 | struct btrfs_key defrag_max; |
6702ed49 CM |
1027 | int defrag_running; |
1028 | int defrag_level; | |
58176a96 | 1029 | char *name; |
4313b399 | 1030 | int in_sysfs; |
0b86a832 CM |
1031 | |
1032 | /* the dirty list is only used by non-reference counted roots */ | |
1033 | struct list_head dirty_list; | |
7b128766 | 1034 | |
5d4f98a2 YZ |
1035 | struct list_head root_list; |
1036 | ||
bcc63abb | 1037 | spinlock_t list_lock; |
7b128766 | 1038 | struct list_head orphan_list; |
3394e160 | 1039 | |
5d4f98a2 YZ |
1040 | spinlock_t inode_lock; |
1041 | /* red-black tree that keeps track of in-memory inodes */ | |
1042 | struct rb_root inode_tree; | |
1043 | ||
3394e160 CM |
1044 | /* |
1045 | * right now this just gets used so that a root has its own devid | |
1046 | * for stat. It may be used for more later | |
1047 | */ | |
1048 | struct super_block anon_super; | |
62e2749e CM |
1049 | }; |
1050 | ||
1e1d2701 CM |
1051 | /* |
1052 | * inode items have the data typically returned from stat and store other | |
1053 | * info about object characteristics. There is one for every file and dir in | |
1054 | * the FS | |
1055 | */ | |
9078a3e1 | 1056 | #define BTRFS_INODE_ITEM_KEY 1 |
0660b5af CM |
1057 | #define BTRFS_INODE_REF_KEY 12 |
1058 | #define BTRFS_XATTR_ITEM_KEY 24 | |
1059 | #define BTRFS_ORPHAN_ITEM_KEY 48 | |
9078a3e1 | 1060 | /* reserve 2-15 close to the inode for later flexibility */ |
1e1d2701 CM |
1061 | |
1062 | /* | |
1063 | * dir items are the name -> inode pointers in a directory. There is one | |
1064 | * for every name in a directory. | |
1065 | */ | |
0660b5af CM |
1066 | #define BTRFS_DIR_LOG_ITEM_KEY 60 |
1067 | #define BTRFS_DIR_LOG_INDEX_KEY 72 | |
1068 | #define BTRFS_DIR_ITEM_KEY 84 | |
1069 | #define BTRFS_DIR_INDEX_KEY 96 | |
1e1d2701 | 1070 | /* |
9078a3e1 | 1071 | * extent data is for file data |
1e1d2701 | 1072 | */ |
0660b5af | 1073 | #define BTRFS_EXTENT_DATA_KEY 108 |
d20f7043 | 1074 | |
f254e52c | 1075 | /* |
d20f7043 CM |
1076 | * extent csums are stored in a separate tree and hold csums for |
1077 | * an entire extent on disk. | |
f254e52c | 1078 | */ |
d20f7043 | 1079 | #define BTRFS_EXTENT_CSUM_KEY 128 |
f254e52c | 1080 | |
1e1d2701 | 1081 | /* |
d4a78947 | 1082 | * root items point to tree roots. They are typically in the root |
1e1d2701 CM |
1083 | * tree used by the super block to find all the other trees |
1084 | */ | |
0660b5af CM |
1085 | #define BTRFS_ROOT_ITEM_KEY 132 |
1086 | ||
1087 | /* | |
1088 | * root backrefs tie subvols and snapshots to the directory entries that | |
1089 | * reference them | |
1090 | */ | |
1091 | #define BTRFS_ROOT_BACKREF_KEY 144 | |
1092 | ||
1093 | /* | |
1094 | * root refs make a fast index for listing all of the snapshots and | |
1095 | * subvolumes referenced by a given root. They point directly to the | |
1096 | * directory item in the root that references the subvol | |
1097 | */ | |
1098 | #define BTRFS_ROOT_REF_KEY 156 | |
1099 | ||
1e1d2701 CM |
1100 | /* |
1101 | * extent items are in the extent map tree. These record which blocks | |
1102 | * are used, and how many references there are to each block | |
1103 | */ | |
0660b5af | 1104 | #define BTRFS_EXTENT_ITEM_KEY 168 |
5d4f98a2 YZ |
1105 | |
1106 | #define BTRFS_TREE_BLOCK_REF_KEY 176 | |
1107 | ||
1108 | #define BTRFS_EXTENT_DATA_REF_KEY 178 | |
1109 | ||
1110 | #define BTRFS_EXTENT_REF_V0_KEY 180 | |
1111 | ||
1112 | #define BTRFS_SHARED_BLOCK_REF_KEY 182 | |
1113 | ||
1114 | #define BTRFS_SHARED_DATA_REF_KEY 184 | |
9078a3e1 CM |
1115 | |
1116 | /* | |
1117 | * block groups give us hints into the extent allocation trees. Which | |
1118 | * blocks are free etc etc | |
1119 | */ | |
0660b5af | 1120 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 192 |
9f5fae2f | 1121 | |
0660b5af CM |
1122 | #define BTRFS_DEV_EXTENT_KEY 204 |
1123 | #define BTRFS_DEV_ITEM_KEY 216 | |
1124 | #define BTRFS_CHUNK_ITEM_KEY 228 | |
0b86a832 | 1125 | |
1e1d2701 CM |
1126 | /* |
1127 | * string items are for debugging. They just store a short string of | |
1128 | * data in the FS | |
1129 | */ | |
9078a3e1 CM |
1130 | #define BTRFS_STRING_ITEM_KEY 253 |
1131 | ||
21ad10cf CM |
1132 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
1133 | #define BTRFS_MOUNT_NODATACOW (1 << 1) | |
1134 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) | |
e18e4809 | 1135 | #define BTRFS_MOUNT_SSD (1 << 3) |
dfe25020 | 1136 | #define BTRFS_MOUNT_DEGRADED (1 << 4) |
c8b97818 | 1137 | #define BTRFS_MOUNT_COMPRESS (1 << 5) |
3a5e1404 | 1138 | #define BTRFS_MOUNT_NOTREELOG (1 << 6) |
dccae999 | 1139 | #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) |
451d7585 | 1140 | #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) |
c289811c | 1141 | #define BTRFS_MOUNT_NOSSD (1 << 9) |
b6cda9bc CM |
1142 | |
1143 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) | |
1144 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) | |
1145 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ | |
1146 | BTRFS_MOUNT_##opt) | |
b98b6767 Y |
1147 | /* |
1148 | * Inode flags | |
1149 | */ | |
fdebe2bd Y |
1150 | #define BTRFS_INODE_NODATASUM (1 << 0) |
1151 | #define BTRFS_INODE_NODATACOW (1 << 1) | |
1152 | #define BTRFS_INODE_READONLY (1 << 2) | |
c8b97818 | 1153 | #define BTRFS_INODE_NOCOMPRESS (1 << 3) |
d899e052 | 1154 | #define BTRFS_INODE_PREALLOC (1 << 4) |
6cbff00f CH |
1155 | #define BTRFS_INODE_SYNC (1 << 5) |
1156 | #define BTRFS_INODE_IMMUTABLE (1 << 6) | |
1157 | #define BTRFS_INODE_APPEND (1 << 7) | |
1158 | #define BTRFS_INODE_NODUMP (1 << 8) | |
1159 | #define BTRFS_INODE_NOATIME (1 << 9) | |
1160 | #define BTRFS_INODE_DIRSYNC (1 << 10) | |
1161 | ||
1162 | ||
5f39d397 CM |
1163 | /* some macros to generate set/get funcs for the struct fields. This |
1164 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | |
1165 | * one for u8: | |
1166 | */ | |
1167 | #define le8_to_cpu(v) (v) | |
1168 | #define cpu_to_le8(v) (v) | |
1169 | #define __le8 u8 | |
1170 | ||
1171 | #define read_eb_member(eb, ptr, type, member, result) ( \ | |
1172 | read_extent_buffer(eb, (char *)(result), \ | |
1173 | ((unsigned long)(ptr)) + \ | |
1174 | offsetof(type, member), \ | |
1175 | sizeof(((type *)0)->member))) | |
1176 | ||
1177 | #define write_eb_member(eb, ptr, type, member, result) ( \ | |
1178 | write_extent_buffer(eb, (char *)(result), \ | |
1179 | ((unsigned long)(ptr)) + \ | |
1180 | offsetof(type, member), \ | |
1181 | sizeof(((type *)0)->member))) | |
1182 | ||
0f82731f | 1183 | #ifndef BTRFS_SETGET_FUNCS |
5f39d397 | 1184 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
0f82731f CM |
1185 | u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ |
1186 | void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); | |
1187 | #endif | |
5f39d397 CM |
1188 | |
1189 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | |
1190 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | |
1191 | { \ | |
df68b8a7 DM |
1192 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
1193 | u##bits res = le##bits##_to_cpu(p->member); \ | |
1194 | kunmap_atomic(p, KM_USER0); \ | |
810191ff | 1195 | return res; \ |
5f39d397 CM |
1196 | } \ |
1197 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
1198 | u##bits val) \ | |
1199 | { \ | |
df68b8a7 DM |
1200 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
1201 | p->member = cpu_to_le##bits(val); \ | |
1202 | kunmap_atomic(p, KM_USER0); \ | |
5f39d397 | 1203 | } |
9078a3e1 | 1204 | |
5f39d397 CM |
1205 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
1206 | static inline u##bits btrfs_##name(type *s) \ | |
1207 | { \ | |
1208 | return le##bits##_to_cpu(s->member); \ | |
1209 | } \ | |
1210 | static inline void btrfs_set_##name(type *s, u##bits val) \ | |
1211 | { \ | |
1212 | s->member = cpu_to_le##bits(val); \ | |
1e1d2701 CM |
1213 | } |
1214 | ||
0b86a832 CM |
1215 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
1216 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); | |
1217 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); | |
1218 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); | |
1219 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); | |
c3027eb5 CM |
1220 | BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, |
1221 | start_offset, 64); | |
0b86a832 CM |
1222 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); |
1223 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
1224 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); |
1225 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); | |
1226 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); | |
2b82032c | 1227 | BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); |
0b86a832 | 1228 | |
8a4b83cc CM |
1229 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
1230 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, | |
1231 | total_bytes, 64); | |
1232 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, | |
1233 | bytes_used, 64); | |
1234 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, | |
1235 | io_align, 32); | |
1236 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, | |
1237 | io_width, 32); | |
1238 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, | |
1239 | sector_size, 32); | |
1240 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
1241 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, |
1242 | dev_group, 32); | |
1243 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, | |
1244 | seek_speed, 8); | |
1245 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, | |
1246 | bandwidth, 8); | |
2b82032c YZ |
1247 | BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, |
1248 | generation, 64); | |
8a4b83cc | 1249 | |
0b86a832 CM |
1250 | static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) |
1251 | { | |
1252 | return (char *)d + offsetof(struct btrfs_dev_item, uuid); | |
1253 | } | |
1254 | ||
2b82032c YZ |
1255 | static inline char *btrfs_device_fsid(struct btrfs_dev_item *d) |
1256 | { | |
1257 | return (char *)d + offsetof(struct btrfs_dev_item, fsid); | |
1258 | } | |
1259 | ||
e17cade2 | 1260 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
0b86a832 CM |
1261 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
1262 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); | |
1263 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); | |
1264 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); | |
1265 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); | |
1266 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); | |
1267 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); | |
321aecc6 | 1268 | BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); |
0b86a832 CM |
1269 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
1270 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); | |
1271 | ||
e17cade2 CM |
1272 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
1273 | { | |
1274 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); | |
1275 | } | |
1276 | ||
1277 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); | |
0b86a832 CM |
1278 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
1279 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, | |
1280 | stripe_len, 64); | |
1281 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, | |
1282 | io_align, 32); | |
1283 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, | |
1284 | io_width, 32); | |
1285 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, | |
1286 | sector_size, 32); | |
1287 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); | |
1288 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, | |
1289 | num_stripes, 16); | |
321aecc6 CM |
1290 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, |
1291 | sub_stripes, 16); | |
0b86a832 CM |
1292 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
1293 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); | |
1294 | ||
1295 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, | |
1296 | int nr) | |
1297 | { | |
1298 | unsigned long offset = (unsigned long)c; | |
1299 | offset += offsetof(struct btrfs_chunk, stripe); | |
1300 | offset += nr * sizeof(struct btrfs_stripe); | |
1301 | return (struct btrfs_stripe *)offset; | |
1302 | } | |
1303 | ||
a443755f CM |
1304 | static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) |
1305 | { | |
1306 | return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); | |
1307 | } | |
1308 | ||
0b86a832 CM |
1309 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
1310 | struct btrfs_chunk *c, int nr) | |
1311 | { | |
1312 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); | |
1313 | } | |
1314 | ||
1315 | static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, | |
1316 | struct btrfs_chunk *c, int nr, | |
1317 | u64 val) | |
1318 | { | |
1319 | btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); | |
1320 | } | |
1321 | ||
1322 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, | |
1323 | struct btrfs_chunk *c, int nr) | |
1324 | { | |
1325 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); | |
1326 | } | |
1327 | ||
1328 | static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, | |
1329 | struct btrfs_chunk *c, int nr, | |
1330 | u64 val) | |
1331 | { | |
1332 | btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); | |
1333 | } | |
1334 | ||
5f39d397 CM |
1335 | /* struct btrfs_block_group_item */ |
1336 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | |
1337 | used, 64); | |
1338 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | |
1339 | used, 64); | |
0b86a832 CM |
1340 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
1341 | struct btrfs_block_group_item, chunk_objectid, 64); | |
e17cade2 CM |
1342 | |
1343 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, | |
0b86a832 CM |
1344 | struct btrfs_block_group_item, chunk_objectid, 64); |
1345 | BTRFS_SETGET_FUNCS(disk_block_group_flags, | |
1346 | struct btrfs_block_group_item, flags, 64); | |
1347 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, | |
1348 | struct btrfs_block_group_item, flags, 64); | |
1e1d2701 | 1349 | |
3954401f CM |
1350 | /* struct btrfs_inode_ref */ |
1351 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); | |
aec7477b | 1352 | BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); |
3954401f | 1353 | |
5f39d397 CM |
1354 | /* struct btrfs_inode_item */ |
1355 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | |
c3027eb5 | 1356 | BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); |
e02119d5 | 1357 | BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); |
5f39d397 | 1358 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); |
a76a3cd4 | 1359 | BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); |
5f39d397 CM |
1360 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); |
1361 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | |
1362 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | |
1363 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | |
1364 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | |
0b86a832 | 1365 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
f2b636e8 | 1366 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); |
1e1d2701 | 1367 | |
0b86a832 | 1368 | static inline struct btrfs_timespec * |
5f39d397 | 1369 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1370 | { |
5f39d397 CM |
1371 | unsigned long ptr = (unsigned long)inode_item; |
1372 | ptr += offsetof(struct btrfs_inode_item, atime); | |
0b86a832 | 1373 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1374 | } |
1375 | ||
0b86a832 | 1376 | static inline struct btrfs_timespec * |
5f39d397 | 1377 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1378 | { |
5f39d397 CM |
1379 | unsigned long ptr = (unsigned long)inode_item; |
1380 | ptr += offsetof(struct btrfs_inode_item, mtime); | |
0b86a832 | 1381 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1382 | } |
1383 | ||
0b86a832 | 1384 | static inline struct btrfs_timespec * |
5f39d397 | 1385 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1386 | { |
5f39d397 CM |
1387 | unsigned long ptr = (unsigned long)inode_item; |
1388 | ptr += offsetof(struct btrfs_inode_item, ctime); | |
0b86a832 | 1389 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1390 | } |
1391 | ||
0b86a832 | 1392 | static inline struct btrfs_timespec * |
5f39d397 | 1393 | btrfs_inode_otime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1394 | { |
5f39d397 CM |
1395 | unsigned long ptr = (unsigned long)inode_item; |
1396 | ptr += offsetof(struct btrfs_inode_item, otime); | |
0b86a832 | 1397 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1398 | } |
1399 | ||
0b86a832 CM |
1400 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
1401 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); | |
e20d96d6 | 1402 | |
0b86a832 | 1403 | /* struct btrfs_dev_extent */ |
e17cade2 CM |
1404 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
1405 | chunk_tree, 64); | |
1406 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, | |
1407 | chunk_objectid, 64); | |
1408 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, | |
1409 | chunk_offset, 64); | |
0b86a832 CM |
1410 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
1411 | ||
e17cade2 CM |
1412 | static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
1413 | { | |
1414 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); | |
1415 | return (u8 *)((unsigned long)dev + ptr); | |
1416 | } | |
1417 | ||
5d4f98a2 YZ |
1418 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); |
1419 | BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, | |
1420 | generation, 64); | |
1421 | BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); | |
74493f7a | 1422 | |
5d4f98a2 YZ |
1423 | BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); |
1424 | ||
1425 | ||
1426 | BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); | |
1427 | ||
1428 | static inline void btrfs_tree_block_key(struct extent_buffer *eb, | |
1429 | struct btrfs_tree_block_info *item, | |
1430 | struct btrfs_disk_key *key) | |
1431 | { | |
1432 | read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
1433 | } | |
1434 | ||
1435 | static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, | |
1436 | struct btrfs_tree_block_info *item, | |
1437 | struct btrfs_disk_key *key) | |
1438 | { | |
1439 | write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
1440 | } | |
e20d96d6 | 1441 | |
5d4f98a2 YZ |
1442 | BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, |
1443 | root, 64); | |
1444 | BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, | |
1445 | objectid, 64); | |
1446 | BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, | |
1447 | offset, 64); | |
1448 | BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, | |
1449 | count, 32); | |
1450 | ||
1451 | BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, | |
1452 | count, 32); | |
1453 | ||
1454 | BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, | |
1455 | type, 8); | |
1456 | BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, | |
1457 | offset, 64); | |
1458 | ||
1459 | static inline u32 btrfs_extent_inline_ref_size(int type) | |
1460 | { | |
1461 | if (type == BTRFS_TREE_BLOCK_REF_KEY || | |
1462 | type == BTRFS_SHARED_BLOCK_REF_KEY) | |
1463 | return sizeof(struct btrfs_extent_inline_ref); | |
1464 | if (type == BTRFS_SHARED_DATA_REF_KEY) | |
1465 | return sizeof(struct btrfs_shared_data_ref) + | |
1466 | sizeof(struct btrfs_extent_inline_ref); | |
1467 | if (type == BTRFS_EXTENT_DATA_REF_KEY) | |
1468 | return sizeof(struct btrfs_extent_data_ref) + | |
1469 | offsetof(struct btrfs_extent_inline_ref, offset); | |
1470 | BUG(); | |
1471 | return 0; | |
1472 | } | |
1473 | ||
1474 | BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); | |
1475 | BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, | |
1476 | generation, 64); | |
1477 | BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); | |
1478 | BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); | |
e20d96d6 | 1479 | |
5f39d397 CM |
1480 | /* struct btrfs_node */ |
1481 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | |
74493f7a | 1482 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
e20d96d6 | 1483 | |
5f39d397 | 1484 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
cf27e1ee | 1485 | { |
5f39d397 CM |
1486 | unsigned long ptr; |
1487 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1488 | sizeof(struct btrfs_key_ptr) * nr; | |
1489 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | |
cf27e1ee CM |
1490 | } |
1491 | ||
5f39d397 CM |
1492 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
1493 | int nr, u64 val) | |
cf27e1ee | 1494 | { |
5f39d397 CM |
1495 | unsigned long ptr; |
1496 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1497 | sizeof(struct btrfs_key_ptr) * nr; | |
1498 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | |
cf27e1ee CM |
1499 | } |
1500 | ||
74493f7a CM |
1501 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
1502 | { | |
1503 | unsigned long ptr; | |
1504 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1505 | sizeof(struct btrfs_key_ptr) * nr; | |
1506 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); | |
1507 | } | |
1508 | ||
1509 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, | |
1510 | int nr, u64 val) | |
1511 | { | |
1512 | unsigned long ptr; | |
1513 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1514 | sizeof(struct btrfs_key_ptr) * nr; | |
1515 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); | |
1516 | } | |
1517 | ||
810191ff | 1518 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
4d775673 | 1519 | { |
5f39d397 CM |
1520 | return offsetof(struct btrfs_node, ptrs) + |
1521 | sizeof(struct btrfs_key_ptr) * nr; | |
4d775673 CM |
1522 | } |
1523 | ||
e644d021 CM |
1524 | void btrfs_node_key(struct extent_buffer *eb, |
1525 | struct btrfs_disk_key *disk_key, int nr); | |
1526 | ||
5f39d397 CM |
1527 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
1528 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f8a0c | 1529 | { |
5f39d397 CM |
1530 | unsigned long ptr; |
1531 | ptr = btrfs_node_key_ptr_offset(nr); | |
1532 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
1533 | struct btrfs_key_ptr, key, disk_key); | |
1d4f8a0c CM |
1534 | } |
1535 | ||
5f39d397 CM |
1536 | /* struct btrfs_item */ |
1537 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | |
1538 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | |
4d775673 | 1539 | |
5f39d397 | 1540 | static inline unsigned long btrfs_item_nr_offset(int nr) |
1d4f8a0c | 1541 | { |
5f39d397 CM |
1542 | return offsetof(struct btrfs_leaf, items) + |
1543 | sizeof(struct btrfs_item) * nr; | |
1d4f8a0c CM |
1544 | } |
1545 | ||
5f39d397 CM |
1546 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
1547 | int nr) | |
0783fcfc | 1548 | { |
5f39d397 | 1549 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
0783fcfc CM |
1550 | } |
1551 | ||
5f39d397 CM |
1552 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
1553 | struct btrfs_item *item) | |
0783fcfc | 1554 | { |
5f39d397 | 1555 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
0783fcfc CM |
1556 | } |
1557 | ||
5f39d397 | 1558 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1559 | { |
5f39d397 | 1560 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1561 | } |
1562 | ||
5f39d397 | 1563 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1564 | { |
5f39d397 | 1565 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1566 | } |
1567 | ||
5f39d397 | 1568 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1569 | { |
5f39d397 | 1570 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1571 | } |
1572 | ||
5f39d397 CM |
1573 | static inline void btrfs_item_key(struct extent_buffer *eb, |
1574 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 1575 | { |
5f39d397 CM |
1576 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
1577 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
1578 | } |
1579 | ||
5f39d397 CM |
1580 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
1581 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 1582 | { |
5f39d397 CM |
1583 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
1584 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
1585 | } |
1586 | ||
e02119d5 CM |
1587 | BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); |
1588 | ||
0660b5af CM |
1589 | /* |
1590 | * struct btrfs_root_ref | |
1591 | */ | |
1592 | BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); | |
1593 | BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); | |
1594 | BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); | |
1595 | ||
5f39d397 | 1596 | /* struct btrfs_dir_item */ |
5103e947 | 1597 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
5f39d397 CM |
1598 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
1599 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | |
e02119d5 | 1600 | BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); |
1d4f6404 | 1601 | |
5f39d397 CM |
1602 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
1603 | struct btrfs_dir_item *item, | |
1604 | struct btrfs_disk_key *key) | |
1d4f6404 | 1605 | { |
5f39d397 | 1606 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
1d4f6404 CM |
1607 | } |
1608 | ||
5f39d397 CM |
1609 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
1610 | struct btrfs_dir_item *item, | |
1611 | struct btrfs_disk_key *key) | |
a8a2ee0c | 1612 | { |
5f39d397 | 1613 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
a8a2ee0c CM |
1614 | } |
1615 | ||
5f39d397 CM |
1616 | /* struct btrfs_disk_key */ |
1617 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | |
1618 | objectid, 64); | |
1619 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | |
1620 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | |
1d4f6404 | 1621 | |
e2fa7227 CM |
1622 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
1623 | struct btrfs_disk_key *disk) | |
1624 | { | |
1625 | cpu->offset = le64_to_cpu(disk->offset); | |
5f39d397 | 1626 | cpu->type = disk->type; |
e2fa7227 CM |
1627 | cpu->objectid = le64_to_cpu(disk->objectid); |
1628 | } | |
1629 | ||
1630 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
1631 | struct btrfs_key *cpu) | |
1632 | { | |
1633 | disk->offset = cpu_to_le64(cpu->offset); | |
5f39d397 | 1634 | disk->type = cpu->type; |
e2fa7227 CM |
1635 | disk->objectid = cpu_to_le64(cpu->objectid); |
1636 | } | |
1637 | ||
5f39d397 CM |
1638 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
1639 | struct btrfs_key *key, int nr) | |
7f5c1516 | 1640 | { |
5f39d397 CM |
1641 | struct btrfs_disk_key disk_key; |
1642 | btrfs_node_key(eb, &disk_key, nr); | |
1643 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
1644 | } |
1645 | ||
5f39d397 CM |
1646 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
1647 | struct btrfs_key *key, int nr) | |
7f5c1516 | 1648 | { |
5f39d397 CM |
1649 | struct btrfs_disk_key disk_key; |
1650 | btrfs_item_key(eb, &disk_key, nr); | |
1651 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
1652 | } |
1653 | ||
5f39d397 CM |
1654 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
1655 | struct btrfs_dir_item *item, | |
1656 | struct btrfs_key *key) | |
4d775673 | 1657 | { |
5f39d397 CM |
1658 | struct btrfs_disk_key disk_key; |
1659 | btrfs_dir_item_key(eb, item, &disk_key); | |
1660 | btrfs_disk_key_to_cpu(key, &disk_key); | |
4d775673 CM |
1661 | } |
1662 | ||
58176a96 | 1663 | |
5f39d397 | 1664 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
3768f368 | 1665 | { |
5f39d397 | 1666 | return key->type; |
3768f368 CM |
1667 | } |
1668 | ||
5f39d397 | 1669 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
3768f368 | 1670 | { |
5f39d397 | 1671 | key->type = val; |
3768f368 CM |
1672 | } |
1673 | ||
5f39d397 | 1674 | /* struct btrfs_header */ |
db94535d | 1675 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
5f39d397 CM |
1676 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
1677 | generation, 64); | |
1678 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | |
1679 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | |
63b10fc4 | 1680 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
5f39d397 | 1681 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
0f7d52f4 | 1682 | |
63b10fc4 CM |
1683 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) |
1684 | { | |
1685 | return (btrfs_header_flags(eb) & flag) == flag; | |
1686 | } | |
1687 | ||
1688 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) | |
1689 | { | |
1690 | u64 flags = btrfs_header_flags(eb); | |
1691 | btrfs_set_header_flags(eb, flags | flag); | |
1692 | return (flags & flag) == flag; | |
1693 | } | |
1694 | ||
1695 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) | |
1696 | { | |
1697 | u64 flags = btrfs_header_flags(eb); | |
1698 | btrfs_set_header_flags(eb, flags & ~flag); | |
1699 | return (flags & flag) == flag; | |
1700 | } | |
1701 | ||
5d4f98a2 YZ |
1702 | static inline int btrfs_header_backref_rev(struct extent_buffer *eb) |
1703 | { | |
1704 | u64 flags = btrfs_header_flags(eb); | |
1705 | return flags >> BTRFS_BACKREF_REV_SHIFT; | |
1706 | } | |
1707 | ||
1708 | static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, | |
1709 | int rev) | |
1710 | { | |
1711 | u64 flags = btrfs_header_flags(eb); | |
1712 | flags &= ~BTRFS_BACKREF_REV_MASK; | |
1713 | flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; | |
1714 | btrfs_set_header_flags(eb, flags); | |
1715 | } | |
1716 | ||
5f39d397 | 1717 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
0f7d52f4 | 1718 | { |
5f39d397 CM |
1719 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
1720 | return (u8 *)ptr; | |
0f7d52f4 CM |
1721 | } |
1722 | ||
e17cade2 CM |
1723 | static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) |
1724 | { | |
1725 | unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid); | |
1726 | return (u8 *)ptr; | |
1727 | } | |
1728 | ||
5f39d397 | 1729 | static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) |
3768f368 | 1730 | { |
5f39d397 CM |
1731 | unsigned long ptr = offsetof(struct btrfs_super_block, fsid); |
1732 | return (u8 *)ptr; | |
3768f368 CM |
1733 | } |
1734 | ||
5f39d397 | 1735 | static inline u8 *btrfs_header_csum(struct extent_buffer *eb) |
3768f368 | 1736 | { |
5f39d397 CM |
1737 | unsigned long ptr = offsetof(struct btrfs_header, csum); |
1738 | return (u8 *)ptr; | |
3768f368 CM |
1739 | } |
1740 | ||
5f39d397 | 1741 | static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) |
3768f368 | 1742 | { |
5f39d397 | 1743 | return NULL; |
3768f368 CM |
1744 | } |
1745 | ||
5f39d397 | 1746 | static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) |
3768f368 | 1747 | { |
5f39d397 | 1748 | return NULL; |
3768f368 CM |
1749 | } |
1750 | ||
5f39d397 | 1751 | static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) |
3768f368 | 1752 | { |
5f39d397 | 1753 | return NULL; |
3768f368 CM |
1754 | } |
1755 | ||
5f39d397 | 1756 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
3768f368 | 1757 | { |
d397712b | 1758 | return btrfs_header_level(eb) == 0; |
3768f368 CM |
1759 | } |
1760 | ||
5f39d397 | 1761 | /* struct btrfs_root_item */ |
84234f3a YZ |
1762 | BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, |
1763 | generation, 64); | |
5f39d397 | 1764 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); |
db94535d CM |
1765 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
1766 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); | |
3768f368 | 1767 | |
84234f3a YZ |
1768 | BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, |
1769 | generation, 64); | |
db94535d CM |
1770 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
1771 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); | |
5f39d397 CM |
1772 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
1773 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | |
f2b636e8 | 1774 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); |
db94535d CM |
1775 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
1776 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); | |
80ff3856 YZ |
1777 | BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, |
1778 | last_snapshot, 64); | |
123abc88 | 1779 | |
5f39d397 | 1780 | /* struct btrfs_super_block */ |
607d432d | 1781 | |
db94535d | 1782 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
a061fc8d | 1783 | BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); |
5f39d397 CM |
1784 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
1785 | generation, 64); | |
1786 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | |
0b86a832 CM |
1787 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
1788 | struct btrfs_super_block, sys_chunk_array_size, 32); | |
84234f3a YZ |
1789 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, |
1790 | struct btrfs_super_block, chunk_root_generation, 64); | |
db94535d CM |
1791 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
1792 | root_level, 8); | |
0b86a832 CM |
1793 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
1794 | chunk_root, 64); | |
1795 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, | |
e02119d5 CM |
1796 | chunk_root_level, 8); |
1797 | BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, | |
1798 | log_root, 64); | |
c3027eb5 CM |
1799 | BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, |
1800 | log_root_transid, 64); | |
e02119d5 CM |
1801 | BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, |
1802 | log_root_level, 8); | |
db94535d CM |
1803 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
1804 | total_bytes, 64); | |
1805 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, | |
1806 | bytes_used, 64); | |
5f39d397 CM |
1807 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
1808 | sectorsize, 32); | |
1809 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | |
1810 | nodesize, 32); | |
1811 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, | |
1812 | leafsize, 32); | |
87ee04eb CM |
1813 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
1814 | stripesize, 32); | |
5f39d397 CM |
1815 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
1816 | root_dir_objectid, 64); | |
8a4b83cc CM |
1817 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
1818 | num_devices, 64); | |
f2b636e8 JB |
1819 | BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, |
1820 | compat_flags, 64); | |
1821 | BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, | |
1822 | compat_flags, 64); | |
1823 | BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, | |
1824 | incompat_flags, 64); | |
607d432d JB |
1825 | BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, |
1826 | csum_type, 16); | |
1827 | ||
1828 | static inline int btrfs_super_csum_size(struct btrfs_super_block *s) | |
1829 | { | |
1830 | int t = btrfs_super_csum_type(s); | |
1831 | BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes)); | |
1832 | return btrfs_csum_sizes[t]; | |
1833 | } | |
2e635a27 | 1834 | |
5f39d397 | 1835 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
2e635a27 | 1836 | { |
5f39d397 | 1837 | return offsetof(struct btrfs_leaf, items); |
2e635a27 CM |
1838 | } |
1839 | ||
5f39d397 CM |
1840 | /* struct btrfs_file_extent_item */ |
1841 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | |
9f5fae2f | 1842 | |
d397712b CM |
1843 | static inline unsigned long |
1844 | btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) | |
236454df | 1845 | { |
5f39d397 | 1846 | unsigned long offset = (unsigned long)e; |
db94535d | 1847 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 1848 | return offset; |
236454df CM |
1849 | } |
1850 | ||
1851 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
1852 | { | |
db94535d | 1853 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
9f5fae2f CM |
1854 | } |
1855 | ||
db94535d CM |
1856 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
1857 | disk_bytenr, 64); | |
5f39d397 CM |
1858 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
1859 | generation, 64); | |
db94535d CM |
1860 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
1861 | disk_num_bytes, 64); | |
5f39d397 CM |
1862 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
1863 | offset, 64); | |
db94535d CM |
1864 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
1865 | num_bytes, 64); | |
c8b97818 CM |
1866 | BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, |
1867 | ram_bytes, 64); | |
1868 | BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, | |
1869 | compression, 8); | |
1870 | BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, | |
1871 | encryption, 8); | |
1872 | BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, | |
1873 | other_encoding, 16); | |
1874 | ||
1875 | /* this returns the number of file bytes represented by the inline item. | |
1876 | * If an item is compressed, this is the uncompressed size | |
1877 | */ | |
1878 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, | |
1879 | struct btrfs_file_extent_item *e) | |
1880 | { | |
1881 | return btrfs_file_extent_ram_bytes(eb, e); | |
1882 | } | |
1883 | ||
1884 | /* | |
1885 | * this returns the number of bytes used by the item on disk, minus the | |
1886 | * size of any extent headers. If a file is compressed on disk, this is | |
1887 | * the compressed size | |
1888 | */ | |
1889 | static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, | |
1890 | struct btrfs_item *e) | |
1891 | { | |
1892 | unsigned long offset; | |
1893 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); | |
1894 | return btrfs_item_size(eb, e) - offset; | |
1895 | } | |
9f5fae2f | 1896 | |
e20d96d6 CM |
1897 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
1898 | { | |
1899 | return sb->s_fs_info; | |
1900 | } | |
1901 | ||
58176a96 JB |
1902 | static inline int btrfs_set_root_name(struct btrfs_root *root, |
1903 | const char *name, int len) | |
1904 | { | |
1905 | /* if we already have a name just free it */ | |
d397712b | 1906 | kfree(root->name); |
58176a96 JB |
1907 | |
1908 | root->name = kmalloc(len+1, GFP_KERNEL); | |
1909 | if (!root->name) | |
1910 | return -ENOMEM; | |
1911 | ||
1912 | memcpy(root->name, name, len); | |
d397712b | 1913 | root->name[len] = '\0'; |
58176a96 JB |
1914 | |
1915 | return 0; | |
1916 | } | |
1917 | ||
d397712b CM |
1918 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) |
1919 | { | |
db94535d CM |
1920 | if (level == 0) |
1921 | return root->leafsize; | |
1922 | return root->nodesize; | |
1923 | } | |
1924 | ||
4beb1b8b CM |
1925 | /* helper function to cast into the data area of the leaf. */ |
1926 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 | 1927 | ((type *)(btrfs_leaf_data(leaf) + \ |
5f39d397 CM |
1928 | btrfs_item_offset_nr(leaf, slot))) |
1929 | ||
1930 | #define btrfs_item_ptr_offset(leaf, slot) \ | |
1931 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | |
1932 | btrfs_item_offset_nr(leaf, slot))) | |
4beb1b8b | 1933 | |
2b1f55b0 CM |
1934 | static inline struct dentry *fdentry(struct file *file) |
1935 | { | |
6da6abae | 1936 | return file->f_path.dentry; |
6da6abae CM |
1937 | } |
1938 | ||
b18c6685 | 1939 | /* extent-tree.c */ |
fa9c0d79 | 1940 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
56bec294 CM |
1941 | int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, |
1942 | struct btrfs_root *root, unsigned long count); | |
31840ae1 | 1943 | int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len); |
11833d66 YZ |
1944 | int btrfs_pin_extent(struct btrfs_root *root, |
1945 | u64 bytenr, u64 num, int reserved); | |
e02119d5 CM |
1946 | int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans, |
1947 | struct btrfs_root *root, struct extent_buffer *leaf); | |
80ff3856 | 1948 | int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, |
5d4f98a2 YZ |
1949 | struct btrfs_root *root, |
1950 | u64 objectid, u64 offset, u64 bytenr); | |
d1310b2e | 1951 | int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy); |
d397712b CM |
1952 | struct btrfs_block_group_cache *btrfs_lookup_block_group( |
1953 | struct btrfs_fs_info *info, | |
1954 | u64 bytenr); | |
5d4f98a2 | 1955 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
d2fb3437 YZ |
1956 | u64 btrfs_find_block_group(struct btrfs_root *root, |
1957 | u64 search_start, u64 search_hint, int owner); | |
5f39d397 | 1958 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
5d4f98a2 YZ |
1959 | struct btrfs_root *root, u32 blocksize, |
1960 | u64 parent, u64 root_objectid, | |
1961 | struct btrfs_disk_key *key, int level, | |
1962 | u64 hint, u64 empty_size); | |
65b51a00 CM |
1963 | struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans, |
1964 | struct btrfs_root *root, | |
4008c04a CM |
1965 | u64 bytenr, u32 blocksize, |
1966 | int level); | |
5d4f98a2 YZ |
1967 | int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, |
1968 | struct btrfs_root *root, | |
1969 | u64 root_objectid, u64 owner, | |
1970 | u64 offset, struct btrfs_key *ins); | |
1971 | int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, | |
1972 | struct btrfs_root *root, | |
1973 | u64 root_objectid, u64 owner, u64 offset, | |
1974 | struct btrfs_key *ins); | |
e6dcd2dc CM |
1975 | int btrfs_reserve_extent(struct btrfs_trans_handle *trans, |
1976 | struct btrfs_root *root, | |
1977 | u64 num_bytes, u64 min_alloc_size, | |
1978 | u64 empty_size, u64 hint_byte, | |
1979 | u64 search_end, struct btrfs_key *ins, | |
1980 | u64 data); | |
e089f05c | 1981 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
5d4f98a2 YZ |
1982 | struct extent_buffer *buf, int full_backref); |
1983 | int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, | |
1984 | struct extent_buffer *buf, int full_backref); | |
1985 | int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, | |
1986 | struct btrfs_root *root, | |
1987 | u64 bytenr, u64 num_bytes, u64 flags, | |
1988 | int is_data); | |
31840ae1 ZY |
1989 | int btrfs_free_extent(struct btrfs_trans_handle *trans, |
1990 | struct btrfs_root *root, | |
1991 | u64 bytenr, u64 num_bytes, u64 parent, | |
5d4f98a2 YZ |
1992 | u64 root_objectid, u64 owner, u64 offset); |
1993 | ||
65b51a00 | 1994 | int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len); |
11833d66 YZ |
1995 | int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, |
1996 | struct btrfs_root *root); | |
ccd467d6 | 1997 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
11833d66 | 1998 | struct btrfs_root *root); |
b18c6685 | 1999 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
31840ae1 ZY |
2000 | struct btrfs_root *root, |
2001 | u64 bytenr, u64 num_bytes, u64 parent, | |
5d4f98a2 YZ |
2002 | u64 root_objectid, u64 owner, u64 offset); |
2003 | ||
9078a3e1 CM |
2004 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
2005 | struct btrfs_root *root); | |
d2fb3437 | 2006 | int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr); |
9078a3e1 CM |
2007 | int btrfs_free_block_groups(struct btrfs_fs_info *info); |
2008 | int btrfs_read_block_groups(struct btrfs_root *root); | |
0b86a832 CM |
2009 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
2010 | struct btrfs_root *root, u64 bytes_used, | |
e17cade2 | 2011 | u64 type, u64 chunk_objectid, u64 chunk_offset, |
0b86a832 | 2012 | u64 size); |
1a40e23b ZY |
2013 | int btrfs_remove_block_group(struct btrfs_trans_handle *trans, |
2014 | struct btrfs_root *root, u64 group_start); | |
5d4f98a2 YZ |
2015 | int btrfs_prepare_block_group_relocation(struct btrfs_root *root, |
2016 | struct btrfs_block_group_cache *group); | |
2017 | ||
2b82032c | 2018 | u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags); |
6a63209f | 2019 | void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde); |
4184ea7f CM |
2020 | void btrfs_clear_space_info_full(struct btrfs_fs_info *info); |
2021 | ||
6a63209f JB |
2022 | int btrfs_check_metadata_free_space(struct btrfs_root *root); |
2023 | int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode, | |
2024 | u64 bytes); | |
2025 | void btrfs_free_reserved_data_space(struct btrfs_root *root, | |
2026 | struct inode *inode, u64 bytes); | |
2027 | void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode, | |
2028 | u64 bytes); | |
2029 | void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode, | |
2030 | u64 bytes); | |
dee26a9f | 2031 | /* ctree.c */ |
5d4f98a2 YZ |
2032 | int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, |
2033 | int level, int *slot); | |
2034 | int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); | |
0b86a832 CM |
2035 | int btrfs_previous_item(struct btrfs_root *root, |
2036 | struct btrfs_path *path, u64 min_objectid, | |
2037 | int type); | |
31840ae1 ZY |
2038 | int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, |
2039 | struct btrfs_root *root, struct btrfs_path *path, | |
2040 | struct btrfs_key *new_key); | |
925baedd CM |
2041 | struct extent_buffer *btrfs_root_node(struct btrfs_root *root); |
2042 | struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); | |
e7a84565 | 2043 | int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, |
3f157a2f CM |
2044 | struct btrfs_key *key, int lowest_level, |
2045 | int cache_only, u64 min_trans); | |
2046 | int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, | |
e02119d5 | 2047 | struct btrfs_key *max_key, |
3f157a2f CM |
2048 | struct btrfs_path *path, int cache_only, |
2049 | u64 min_trans); | |
5f39d397 CM |
2050 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
2051 | struct btrfs_root *root, struct extent_buffer *buf, | |
2052 | struct extent_buffer *parent, int parent_slot, | |
9fa8cfe7 | 2053 | struct extent_buffer **cow_ret); |
be20aa9d CM |
2054 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
2055 | struct btrfs_root *root, | |
2056 | struct extent_buffer *buf, | |
2057 | struct extent_buffer **cow_ret, u64 new_root_objectid); | |
5d4f98a2 YZ |
2058 | int btrfs_block_can_be_shared(struct btrfs_root *root, |
2059 | struct extent_buffer *buf); | |
6567e837 CM |
2060 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
2061 | *root, struct btrfs_path *path, u32 data_size); | |
b18c6685 CM |
2062 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
2063 | struct btrfs_root *root, | |
2064 | struct btrfs_path *path, | |
179e29e4 | 2065 | u32 new_size, int from_end); |
459931ec CM |
2066 | int btrfs_split_item(struct btrfs_trans_handle *trans, |
2067 | struct btrfs_root *root, | |
2068 | struct btrfs_path *path, | |
2069 | struct btrfs_key *new_key, | |
2070 | unsigned long split_offset); | |
e089f05c CM |
2071 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
2072 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
2073 | ins_len, int cow); | |
6702ed49 | 2074 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
5f39d397 | 2075 | struct btrfs_root *root, struct extent_buffer *parent, |
a6b6e75e CM |
2076 | int start_slot, int cache_only, u64 *last_ret, |
2077 | struct btrfs_key *progress); | |
234b63a0 | 2078 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
2c90e5d6 CM |
2079 | struct btrfs_path *btrfs_alloc_path(void); |
2080 | void btrfs_free_path(struct btrfs_path *p); | |
b4ce94de | 2081 | void btrfs_set_path_blocking(struct btrfs_path *p); |
b4ce94de CM |
2082 | void btrfs_unlock_up_safe(struct btrfs_path *p, int level); |
2083 | ||
85e21bac CM |
2084 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
2085 | struct btrfs_path *path, int slot, int nr); | |
85e21bac CM |
2086 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, |
2087 | struct btrfs_root *root, | |
2088 | struct btrfs_path *path) | |
2089 | { | |
2090 | return btrfs_del_items(trans, root, path, path->slots[0], 1); | |
2091 | } | |
2092 | ||
e089f05c CM |
2093 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
2094 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
f3465ca4 JB |
2095 | int btrfs_insert_some_items(struct btrfs_trans_handle *trans, |
2096 | struct btrfs_root *root, | |
2097 | struct btrfs_path *path, | |
2098 | struct btrfs_key *cpu_key, u32 *data_size, | |
2099 | int nr); | |
9c58309d CM |
2100 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
2101 | struct btrfs_root *root, | |
2102 | struct btrfs_path *path, | |
2103 | struct btrfs_key *cpu_key, u32 *data_size, int nr); | |
2104 | ||
2105 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, | |
2106 | struct btrfs_root *root, | |
2107 | struct btrfs_path *path, | |
2108 | struct btrfs_key *key, | |
2109 | u32 data_size) | |
2110 | { | |
2111 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); | |
2112 | } | |
2113 | ||
234b63a0 | 2114 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
7bb86316 | 2115 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
5f39d397 | 2116 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
2c47e605 | 2117 | int btrfs_drop_snapshot(struct btrfs_root *root, int update_ref); |
f82d02d9 YZ |
2118 | int btrfs_drop_subtree(struct btrfs_trans_handle *trans, |
2119 | struct btrfs_root *root, | |
2120 | struct extent_buffer *node, | |
2121 | struct extent_buffer *parent); | |
dee26a9f | 2122 | /* root-item.c */ |
ea9e8b11 | 2123 | int btrfs_find_root_ref(struct btrfs_root *tree_root, |
4df27c4d YZ |
2124 | struct btrfs_path *path, |
2125 | u64 root_id, u64 ref_id); | |
0660b5af CM |
2126 | int btrfs_add_root_ref(struct btrfs_trans_handle *trans, |
2127 | struct btrfs_root *tree_root, | |
4df27c4d YZ |
2128 | u64 root_id, u64 ref_id, u64 dirid, u64 sequence, |
2129 | const char *name, int name_len); | |
2130 | int btrfs_del_root_ref(struct btrfs_trans_handle *trans, | |
2131 | struct btrfs_root *tree_root, | |
2132 | u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, | |
0660b5af | 2133 | const char *name, int name_len); |
e089f05c CM |
2134 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
2135 | struct btrfs_key *key); | |
2136 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
2137 | *root, struct btrfs_key *key, struct btrfs_root_item | |
2138 | *item); | |
2139 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
2140 | *root, struct btrfs_key *key, struct btrfs_root_item | |
2141 | *item); | |
2142 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct | |
2143 | btrfs_root_item *item, struct btrfs_key *key); | |
bf4ef679 CM |
2144 | int btrfs_search_root(struct btrfs_root *root, u64 search_start, |
2145 | u64 *found_objectid); | |
5d4f98a2 | 2146 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid); |
76dda93c | 2147 | int btrfs_find_orphan_roots(struct btrfs_root *tree_root); |
5d4f98a2 YZ |
2148 | int btrfs_set_root_node(struct btrfs_root_item *item, |
2149 | struct extent_buffer *node); | |
dee26a9f | 2150 | /* dir-item.c */ |
d397712b CM |
2151 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, |
2152 | struct btrfs_root *root, const char *name, | |
2153 | int name_len, u64 dir, | |
aec7477b | 2154 | struct btrfs_key *location, u8 type, u64 index); |
7e38180e CM |
2155 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
2156 | struct btrfs_root *root, | |
2157 | struct btrfs_path *path, u64 dir, | |
2158 | const char *name, int name_len, | |
2159 | int mod); | |
2160 | struct btrfs_dir_item * | |
2161 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | |
2162 | struct btrfs_root *root, | |
2163 | struct btrfs_path *path, u64 dir, | |
2164 | u64 objectid, const char *name, int name_len, | |
2165 | int mod); | |
4df27c4d YZ |
2166 | struct btrfs_dir_item * |
2167 | btrfs_search_dir_index_item(struct btrfs_root *root, | |
2168 | struct btrfs_path *path, u64 dirid, | |
2169 | const char *name, int name_len); | |
7e38180e CM |
2170 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, |
2171 | struct btrfs_path *path, | |
7f5c1516 | 2172 | const char *name, int name_len); |
7e38180e CM |
2173 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
2174 | struct btrfs_root *root, | |
2175 | struct btrfs_path *path, | |
2176 | struct btrfs_dir_item *di); | |
5103e947 JB |
2177 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
2178 | struct btrfs_root *root, const char *name, | |
2179 | u16 name_len, const void *data, u16 data_len, | |
2180 | u64 dir); | |
2181 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, | |
2182 | struct btrfs_root *root, | |
2183 | struct btrfs_path *path, u64 dir, | |
2184 | const char *name, u16 name_len, | |
2185 | int mod); | |
7b128766 JB |
2186 | |
2187 | /* orphan.c */ | |
2188 | int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, | |
2189 | struct btrfs_root *root, u64 offset); | |
2190 | int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, | |
2191 | struct btrfs_root *root, u64 offset); | |
4df27c4d | 2192 | int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); |
7b128766 | 2193 | |
dee26a9f | 2194 | /* inode-map.c */ |
9f5fae2f CM |
2195 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
2196 | struct btrfs_root *fs_root, | |
2197 | u64 dirid, u64 *objectid); | |
5be6f7f1 CM |
2198 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
2199 | ||
dee26a9f | 2200 | /* inode-item.c */ |
3954401f CM |
2201 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
2202 | struct btrfs_root *root, | |
2203 | const char *name, int name_len, | |
aec7477b | 2204 | u64 inode_objectid, u64 ref_objectid, u64 index); |
3954401f CM |
2205 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, |
2206 | struct btrfs_root *root, | |
2207 | const char *name, int name_len, | |
aec7477b | 2208 | u64 inode_objectid, u64 ref_objectid, u64 *index); |
5f39d397 CM |
2209 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
2210 | struct btrfs_root *root, | |
2211 | struct btrfs_path *path, u64 objectid); | |
293ffd5f | 2212 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
2213 | *root, struct btrfs_path *path, |
2214 | struct btrfs_key *location, int mod); | |
dee26a9f CM |
2215 | |
2216 | /* file-item.c */ | |
459931ec CM |
2217 | int btrfs_del_csums(struct btrfs_trans_handle *trans, |
2218 | struct btrfs_root *root, u64 bytenr, u64 len); | |
61b49440 | 2219 | int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, |
d20f7043 | 2220 | struct bio *bio, u32 *dst); |
b18c6685 | 2221 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
c8b97818 CM |
2222 | struct btrfs_root *root, |
2223 | u64 objectid, u64 pos, | |
2224 | u64 disk_offset, u64 disk_num_bytes, | |
2225 | u64 num_bytes, u64 offset, u64 ram_bytes, | |
2226 | u8 compression, u8 encryption, u16 other_encoding); | |
dee26a9f CM |
2227 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
2228 | struct btrfs_root *root, | |
2229 | struct btrfs_path *path, u64 objectid, | |
db94535d | 2230 | u64 bytenr, int mod); |
065631f6 | 2231 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
d20f7043 | 2232 | struct btrfs_root *root, |
e6dcd2dc | 2233 | struct btrfs_ordered_sum *sums); |
3edf7d33 | 2234 | int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, |
d20f7043 | 2235 | struct bio *bio, u64 file_start, int contig); |
c8b97818 CM |
2236 | int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode, |
2237 | u64 start, unsigned long len); | |
b18c6685 CM |
2238 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
2239 | struct btrfs_root *root, | |
2240 | struct btrfs_path *path, | |
d20f7043 | 2241 | u64 bytenr, int cow); |
1de037a4 CM |
2242 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
2243 | struct btrfs_root *root, struct btrfs_path *path, | |
2244 | u64 isize); | |
17d217fe YZ |
2245 | int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, |
2246 | u64 end, struct list_head *list); | |
39279cc3 | 2247 | /* inode.c */ |
4881ee5a CM |
2248 | |
2249 | /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ | |
5036f538 | 2250 | #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) |
4881ee5a CM |
2251 | #define ClearPageChecked ClearPageFsMisc |
2252 | #define SetPageChecked SetPageFsMisc | |
2253 | #define PageChecked PageFsMisc | |
2254 | #endif | |
2255 | ||
3de4586c CM |
2256 | struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); |
2257 | int btrfs_set_inode_index(struct inode *dir, u64 *index); | |
e02119d5 CM |
2258 | int btrfs_unlink_inode(struct btrfs_trans_handle *trans, |
2259 | struct btrfs_root *root, | |
2260 | struct inode *dir, struct inode *inode, | |
2261 | const char *name, int name_len); | |
2262 | int btrfs_add_link(struct btrfs_trans_handle *trans, | |
2263 | struct inode *parent_inode, struct inode *inode, | |
2264 | const char *name, int name_len, int add_backref, u64 index); | |
4df27c4d YZ |
2265 | int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, |
2266 | struct btrfs_root *root, | |
2267 | struct inode *dir, u64 objectid, | |
2268 | const char *name, int name_len); | |
e02119d5 CM |
2269 | int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, |
2270 | struct btrfs_root *root, | |
2271 | struct inode *inode, u64 new_size, | |
2272 | u32 min_type); | |
2273 | ||
ea8c2819 CM |
2274 | int btrfs_start_delalloc_inodes(struct btrfs_root *root); |
2275 | int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end); | |
f421950f CM |
2276 | int btrfs_writepages(struct address_space *mapping, |
2277 | struct writeback_control *wbc); | |
d2fb3437 | 2278 | int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, |
76dda93c | 2279 | struct btrfs_root *new_root, |
d2fb3437 | 2280 | u64 new_dirid, u64 alloc_hint); |
239b14b3 | 2281 | int btrfs_merge_bio_hook(struct page *page, unsigned long offset, |
c8b97818 | 2282 | size_t size, struct bio *bio, unsigned long bio_flags); |
239b14b3 | 2283 | |
edbd8d4e CM |
2284 | unsigned long btrfs_force_ra(struct address_space *mapping, |
2285 | struct file_ra_state *ra, struct file *file, | |
2286 | pgoff_t offset, pgoff_t last_index); | |
c2ec175c | 2287 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); |
9ebefb18 | 2288 | int btrfs_readpage(struct file *file, struct page *page); |
39279cc3 | 2289 | void btrfs_delete_inode(struct inode *inode); |
2da98f00 | 2290 | void btrfs_put_inode(struct inode *inode); |
39279cc3 CM |
2291 | int btrfs_write_inode(struct inode *inode, int wait); |
2292 | void btrfs_dirty_inode(struct inode *inode); | |
2293 | struct inode *btrfs_alloc_inode(struct super_block *sb); | |
2294 | void btrfs_destroy_inode(struct inode *inode); | |
76dda93c | 2295 | void btrfs_drop_inode(struct inode *inode); |
39279cc3 CM |
2296 | int btrfs_init_cachep(void); |
2297 | void btrfs_destroy_cachep(void); | |
6bf13c0c | 2298 | long btrfs_ioctl_trans_end(struct file *file); |
1a54ef8c | 2299 | struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, |
5d4f98a2 | 2300 | struct btrfs_root *root); |
39279cc3 CM |
2301 | int btrfs_commit_write(struct file *file, struct page *page, |
2302 | unsigned from, unsigned to); | |
a52d9a80 CM |
2303 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
2304 | size_t page_offset, u64 start, u64 end, | |
2305 | int create); | |
2306 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
2307 | struct btrfs_root *root, | |
2308 | struct inode *inode); | |
5b21f2ed ZY |
2309 | int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode); |
2310 | int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode); | |
2311 | void btrfs_orphan_cleanup(struct btrfs_root *root); | |
9036c102 | 2312 | int btrfs_cont_expand(struct inode *inode, loff_t size); |
76dda93c YZ |
2313 | int btrfs_invalidate_inodes(struct btrfs_root *root); |
2314 | extern struct dentry_operations btrfs_dentry_operations; | |
f46b5a66 CH |
2315 | |
2316 | /* ioctl.c */ | |
2317 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); | |
6cbff00f CH |
2318 | void btrfs_update_iflags(struct inode *inode); |
2319 | void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); | |
f46b5a66 | 2320 | |
39279cc3 | 2321 | /* file.c */ |
e02119d5 | 2322 | int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync); |
5b21f2ed ZY |
2323 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, |
2324 | int skip_pinned); | |
5f56406a | 2325 | int btrfs_check_file(struct btrfs_root *root, struct inode *inode); |
39279cc3 CM |
2326 | extern struct file_operations btrfs_file_operations; |
2327 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, | |
2328 | struct btrfs_root *root, struct inode *inode, | |
e980b50c | 2329 | u64 start, u64 end, u64 locked_end, |
a1ed835e | 2330 | u64 inline_limit, u64 *hint_block, int drop_cache); |
d899e052 YZ |
2331 | int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, |
2332 | struct btrfs_root *root, | |
2333 | struct inode *inode, u64 start, u64 end); | |
6bf13c0c SW |
2334 | int btrfs_release_file(struct inode *inode, struct file *file); |
2335 | ||
6702ed49 CM |
2336 | /* tree-defrag.c */ |
2337 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | |
2338 | struct btrfs_root *root, int cache_only); | |
58176a96 JB |
2339 | |
2340 | /* sysfs.c */ | |
2341 | int btrfs_init_sysfs(void); | |
2342 | void btrfs_exit_sysfs(void); | |
2343 | int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); | |
2344 | int btrfs_sysfs_add_root(struct btrfs_root *root); | |
2345 | void btrfs_sysfs_del_root(struct btrfs_root *root); | |
2346 | void btrfs_sysfs_del_super(struct btrfs_fs_info *root); | |
2347 | ||
5103e947 JB |
2348 | /* xattr.c */ |
2349 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
6099afe8 | 2350 | |
edbd8d4e CM |
2351 | /* super.c */ |
2352 | u64 btrfs_parse_size(char *str); | |
edf24abe | 2353 | int btrfs_parse_options(struct btrfs_root *root, char *options); |
6bf13c0c | 2354 | int btrfs_sync_fs(struct super_block *sb, int wait); |
33268eaf JB |
2355 | |
2356 | /* acl.c */ | |
7df336ec | 2357 | #ifdef CONFIG_FS_POSIX_ACL |
33268eaf | 2358 | int btrfs_check_acl(struct inode *inode, int mask); |
7df336ec AV |
2359 | #else |
2360 | #define btrfs_check_acl NULL | |
2361 | #endif | |
33268eaf JB |
2362 | int btrfs_init_acl(struct inode *inode, struct inode *dir); |
2363 | int btrfs_acl_chmod(struct inode *inode); | |
0f9dd46c | 2364 | |
5d4f98a2 YZ |
2365 | /* relocation.c */ |
2366 | int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start); | |
2367 | int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, | |
2368 | struct btrfs_root *root); | |
2369 | int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, | |
2370 | struct btrfs_root *root); | |
2371 | int btrfs_recover_relocation(struct btrfs_root *root); | |
2372 | int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); | |
eb60ceac | 2373 | #endif |