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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 | ||
e20d96d6 CM |
117 | /* |
118 | * we can actually store much bigger names, but lets not confuse the rest | |
119 | * of linux | |
120 | */ | |
121 | #define BTRFS_NAME_LEN 255 | |
122 | ||
f254e52c CM |
123 | /* 32 bytes in various csum fields */ |
124 | #define BTRFS_CSUM_SIZE 32 | |
607d432d JB |
125 | |
126 | /* csum types */ | |
127 | #define BTRFS_CSUM_TYPE_CRC32 0 | |
128 | ||
129 | static int btrfs_csum_sizes[] = { 4, 0 }; | |
130 | ||
509659cd | 131 | /* four bytes for CRC32 */ |
3954401f | 132 | #define BTRFS_EMPTY_DIR_SIZE 0 |
f254e52c | 133 | |
fabb5681 CM |
134 | #define BTRFS_FT_UNKNOWN 0 |
135 | #define BTRFS_FT_REG_FILE 1 | |
136 | #define BTRFS_FT_DIR 2 | |
137 | #define BTRFS_FT_CHRDEV 3 | |
138 | #define BTRFS_FT_BLKDEV 4 | |
139 | #define BTRFS_FT_FIFO 5 | |
140 | #define BTRFS_FT_SOCK 6 | |
141 | #define BTRFS_FT_SYMLINK 7 | |
5103e947 JB |
142 | #define BTRFS_FT_XATTR 8 |
143 | #define BTRFS_FT_MAX 9 | |
fabb5681 | 144 | |
fec577fb | 145 | /* |
d4a78947 WF |
146 | * The key defines the order in the tree, and so it also defines (optimal) |
147 | * block layout. | |
148 | * | |
149 | * objectid corresponds to the inode number. | |
150 | * | |
151 | * type tells us things about the object, and is a kind of stream selector. | |
152 | * so for a given inode, keys with type of 1 might refer to the inode data, | |
153 | * type of 2 may point to file data in the btree and type == 3 may point to | |
154 | * extents. | |
fec577fb CM |
155 | * |
156 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
157 | * |
158 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
159 | * in cpu native order. Otherwise they are identical and their sizes | |
160 | * should be the same (ie both packed) | |
fec577fb | 161 | */ |
e2fa7227 CM |
162 | struct btrfs_disk_key { |
163 | __le64 objectid; | |
5f39d397 | 164 | u8 type; |
70b2befd | 165 | __le64 offset; |
e2fa7227 CM |
166 | } __attribute__ ((__packed__)); |
167 | ||
168 | struct btrfs_key { | |
eb60ceac | 169 | u64 objectid; |
5f39d397 | 170 | u8 type; |
70b2befd | 171 | u64 offset; |
eb60ceac CM |
172 | } __attribute__ ((__packed__)); |
173 | ||
0b86a832 CM |
174 | struct btrfs_mapping_tree { |
175 | struct extent_map_tree map_tree; | |
176 | }; | |
177 | ||
e17cade2 | 178 | #define BTRFS_UUID_SIZE 16 |
0b86a832 CM |
179 | struct btrfs_dev_item { |
180 | /* the internal btrfs device id */ | |
181 | __le64 devid; | |
182 | ||
183 | /* size of the device */ | |
184 | __le64 total_bytes; | |
185 | ||
186 | /* bytes used */ | |
187 | __le64 bytes_used; | |
188 | ||
189 | /* optimal io alignment for this device */ | |
190 | __le32 io_align; | |
191 | ||
192 | /* optimal io width for this device */ | |
193 | __le32 io_width; | |
194 | ||
195 | /* minimal io size for this device */ | |
196 | __le32 sector_size; | |
197 | ||
0b86a832 CM |
198 | /* type and info about this device */ |
199 | __le64 type; | |
200 | ||
2b82032c YZ |
201 | /* expected generation for this device */ |
202 | __le64 generation; | |
203 | ||
c3027eb5 CM |
204 | /* |
205 | * starting byte of this partition on the device, | |
d4a78947 | 206 | * to allow for stripe alignment in the future |
c3027eb5 CM |
207 | */ |
208 | __le64 start_offset; | |
209 | ||
e17cade2 CM |
210 | /* grouping information for allocation decisions */ |
211 | __le32 dev_group; | |
212 | ||
213 | /* seek speed 0-100 where 100 is fastest */ | |
214 | u8 seek_speed; | |
215 | ||
216 | /* bandwidth 0-100 where 100 is fastest */ | |
217 | u8 bandwidth; | |
218 | ||
0d81ba5d | 219 | /* btrfs generated uuid for this device */ |
e17cade2 | 220 | u8 uuid[BTRFS_UUID_SIZE]; |
2b82032c YZ |
221 | |
222 | /* uuid of FS who owns this device */ | |
223 | u8 fsid[BTRFS_UUID_SIZE]; | |
0b86a832 CM |
224 | } __attribute__ ((__packed__)); |
225 | ||
226 | struct btrfs_stripe { | |
227 | __le64 devid; | |
228 | __le64 offset; | |
e17cade2 | 229 | u8 dev_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
230 | } __attribute__ ((__packed__)); |
231 | ||
232 | struct btrfs_chunk { | |
e17cade2 CM |
233 | /* size of this chunk in bytes */ |
234 | __le64 length; | |
235 | ||
236 | /* objectid of the root referencing this chunk */ | |
0b86a832 | 237 | __le64 owner; |
e17cade2 | 238 | |
0b86a832 CM |
239 | __le64 stripe_len; |
240 | __le64 type; | |
241 | ||
242 | /* optimal io alignment for this chunk */ | |
243 | __le32 io_align; | |
244 | ||
245 | /* optimal io width for this chunk */ | |
246 | __le32 io_width; | |
247 | ||
248 | /* minimal io size for this chunk */ | |
249 | __le32 sector_size; | |
250 | ||
251 | /* 2^16 stripes is quite a lot, a second limit is the size of a single | |
252 | * item in the btree | |
253 | */ | |
254 | __le16 num_stripes; | |
321aecc6 CM |
255 | |
256 | /* sub stripes only matter for raid10 */ | |
257 | __le16 sub_stripes; | |
0b86a832 CM |
258 | struct btrfs_stripe stripe; |
259 | /* additional stripes go here */ | |
260 | } __attribute__ ((__packed__)); | |
261 | ||
262 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) | |
263 | { | |
264 | BUG_ON(num_stripes == 0); | |
265 | return sizeof(struct btrfs_chunk) + | |
266 | sizeof(struct btrfs_stripe) * (num_stripes - 1); | |
267 | } | |
268 | ||
5f39d397 | 269 | #define BTRFS_FSID_SIZE 16 |
5d4f98a2 YZ |
270 | #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) |
271 | #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) | |
272 | #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32) | |
273 | #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33) | |
274 | ||
275 | #define BTRFS_BACKREF_REV_MAX 256 | |
276 | #define BTRFS_BACKREF_REV_SHIFT 56 | |
277 | #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ | |
278 | BTRFS_BACKREF_REV_SHIFT) | |
279 | ||
280 | #define BTRFS_OLD_BACKREF_REV 0 | |
281 | #define BTRFS_MIXED_BACKREF_REV 1 | |
63b10fc4 | 282 | |
fec577fb CM |
283 | /* |
284 | * every tree block (leaf or node) starts with this header. | |
285 | */ | |
bb492bb0 | 286 | struct btrfs_header { |
e17cade2 | 287 | /* these first four must match the super block */ |
f254e52c | 288 | u8 csum[BTRFS_CSUM_SIZE]; |
5f39d397 | 289 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 290 | __le64 bytenr; /* which block this node is supposed to live in */ |
63b10fc4 | 291 | __le64 flags; |
e17cade2 CM |
292 | |
293 | /* allowed to be different from the super from here on down */ | |
294 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; | |
7f5c1516 | 295 | __le64 generation; |
4d775673 | 296 | __le64 owner; |
5f39d397 | 297 | __le32 nritems; |
9a6f11ed | 298 | u8 level; |
eb60ceac CM |
299 | } __attribute__ ((__packed__)); |
300 | ||
5f39d397 | 301 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
d397712b CM |
302 | sizeof(struct btrfs_header)) / \ |
303 | sizeof(struct btrfs_key_ptr)) | |
123abc88 | 304 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
5f39d397 | 305 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
236454df CM |
306 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
307 | sizeof(struct btrfs_item) - \ | |
308 | sizeof(struct btrfs_file_extent_item)) | |
eb60ceac | 309 | |
0b86a832 CM |
310 | |
311 | /* | |
312 | * this is a very generous portion of the super block, giving us | |
313 | * room to translate 14 chunks with 3 stripes each. | |
314 | */ | |
315 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 | |
7ae9c09d | 316 | #define BTRFS_LABEL_SIZE 256 |
0b86a832 | 317 | |
fec577fb CM |
318 | /* |
319 | * the super block basically lists the main trees of the FS | |
320 | * it currently lacks any block count etc etc | |
321 | */ | |
234b63a0 | 322 | struct btrfs_super_block { |
f254e52c | 323 | u8 csum[BTRFS_CSUM_SIZE]; |
63b10fc4 | 324 | /* the first 4 fields must match struct btrfs_header */ |
2b82032c | 325 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 326 | __le64 bytenr; /* this block number */ |
63b10fc4 | 327 | __le64 flags; |
e17cade2 CM |
328 | |
329 | /* allowed to be different from the btrfs_header from here own down */ | |
3768f368 | 330 | __le64 magic; |
3768f368 CM |
331 | __le64 generation; |
332 | __le64 root; | |
0b86a832 | 333 | __le64 chunk_root; |
e02119d5 | 334 | __le64 log_root; |
c3027eb5 CM |
335 | |
336 | /* this will help find the new super based on the log root */ | |
337 | __le64 log_root_transid; | |
db94535d CM |
338 | __le64 total_bytes; |
339 | __le64 bytes_used; | |
2e635a27 | 340 | __le64 root_dir_objectid; |
8a4b83cc | 341 | __le64 num_devices; |
5f39d397 CM |
342 | __le32 sectorsize; |
343 | __le32 nodesize; | |
344 | __le32 leafsize; | |
87ee04eb | 345 | __le32 stripesize; |
0b86a832 | 346 | __le32 sys_chunk_array_size; |
84234f3a | 347 | __le64 chunk_root_generation; |
f2b636e8 JB |
348 | __le64 compat_flags; |
349 | __le64 compat_ro_flags; | |
350 | __le64 incompat_flags; | |
607d432d | 351 | __le16 csum_type; |
db94535d | 352 | u8 root_level; |
0b86a832 | 353 | u8 chunk_root_level; |
e02119d5 | 354 | u8 log_root_level; |
0d81ba5d | 355 | struct btrfs_dev_item dev_item; |
c3027eb5 | 356 | |
7ae9c09d | 357 | char label[BTRFS_LABEL_SIZE]; |
c3027eb5 CM |
358 | |
359 | /* future expansion */ | |
360 | __le64 reserved[32]; | |
0b86a832 | 361 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
cfaa7295 CM |
362 | } __attribute__ ((__packed__)); |
363 | ||
f2b636e8 JB |
364 | /* |
365 | * Compat flags that we support. If any incompat flags are set other than the | |
366 | * ones specified below then we will fail to mount | |
367 | */ | |
5d4f98a2 YZ |
368 | #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) |
369 | ||
370 | #define BTRFS_FEATURE_COMPAT_SUPP 0ULL | |
371 | #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL | |
372 | #define BTRFS_FEATURE_INCOMPAT_SUPP \ | |
373 | BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | |
f2b636e8 | 374 | |
fec577fb | 375 | /* |
62e2749e | 376 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
377 | * the item in the leaf (relative to the start of the data area) |
378 | */ | |
0783fcfc | 379 | struct btrfs_item { |
e2fa7227 | 380 | struct btrfs_disk_key key; |
123abc88 | 381 | __le32 offset; |
5f39d397 | 382 | __le32 size; |
eb60ceac CM |
383 | } __attribute__ ((__packed__)); |
384 | ||
fec577fb CM |
385 | /* |
386 | * leaves have an item area and a data area: | |
387 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
388 | * | |
389 | * The data is separate from the items to get the keys closer together | |
390 | * during searches. | |
391 | */ | |
234b63a0 | 392 | struct btrfs_leaf { |
bb492bb0 | 393 | struct btrfs_header header; |
123abc88 | 394 | struct btrfs_item items[]; |
eb60ceac CM |
395 | } __attribute__ ((__packed__)); |
396 | ||
fec577fb CM |
397 | /* |
398 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
399 | * other blocks | |
400 | */ | |
123abc88 CM |
401 | struct btrfs_key_ptr { |
402 | struct btrfs_disk_key key; | |
403 | __le64 blockptr; | |
74493f7a | 404 | __le64 generation; |
123abc88 CM |
405 | } __attribute__ ((__packed__)); |
406 | ||
234b63a0 | 407 | struct btrfs_node { |
bb492bb0 | 408 | struct btrfs_header header; |
123abc88 | 409 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
410 | } __attribute__ ((__packed__)); |
411 | ||
fec577fb | 412 | /* |
234b63a0 CM |
413 | * btrfs_paths remember the path taken from the root down to the leaf. |
414 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
415 | * to any other levels that are present. |
416 | * | |
417 | * The slots array records the index of the item or block pointer | |
418 | * used while walking the tree. | |
419 | */ | |
234b63a0 | 420 | struct btrfs_path { |
5f39d397 | 421 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
234b63a0 | 422 | int slots[BTRFS_MAX_LEVEL]; |
925baedd CM |
423 | /* if there is real range locking, this locks field will change */ |
424 | int locks[BTRFS_MAX_LEVEL]; | |
3c69faec | 425 | int reada; |
925baedd | 426 | /* keep some upper locks as we walk down */ |
6702ed49 | 427 | int lowest_level; |
459931ec CM |
428 | |
429 | /* | |
430 | * set by btrfs_split_item, tells search_slot to keep all locks | |
431 | * and to force calls to keep space in the nodes | |
432 | */ | |
b9473439 CM |
433 | unsigned int search_for_split:1; |
434 | unsigned int keep_locks:1; | |
435 | unsigned int skip_locking:1; | |
436 | unsigned int leave_spinning:1; | |
5d4f98a2 | 437 | unsigned int search_commit_root:1; |
eb60ceac | 438 | }; |
5de08d7d | 439 | |
62e2749e CM |
440 | /* |
441 | * items in the extent btree are used to record the objectid of the | |
442 | * owner of the block and the number of references | |
443 | */ | |
5d4f98a2 | 444 | |
62e2749e | 445 | struct btrfs_extent_item { |
5d4f98a2 YZ |
446 | __le64 refs; |
447 | __le64 generation; | |
448 | __le64 flags; | |
449 | } __attribute__ ((__packed__)); | |
450 | ||
451 | struct btrfs_extent_item_v0 { | |
62e2749e | 452 | __le32 refs; |
74493f7a CM |
453 | } __attribute__ ((__packed__)); |
454 | ||
5d4f98a2 YZ |
455 | #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \ |
456 | sizeof(struct btrfs_item)) | |
457 | ||
458 | #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0) | |
459 | #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1) | |
460 | ||
461 | /* following flags only apply to tree blocks */ | |
462 | ||
463 | /* use full backrefs for extent pointers in the block */ | |
464 | #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8) | |
465 | ||
466 | struct btrfs_tree_block_info { | |
467 | struct btrfs_disk_key key; | |
468 | u8 level; | |
469 | } __attribute__ ((__packed__)); | |
470 | ||
471 | struct btrfs_extent_data_ref { | |
472 | __le64 root; | |
473 | __le64 objectid; | |
474 | __le64 offset; | |
475 | __le32 count; | |
476 | } __attribute__ ((__packed__)); | |
477 | ||
478 | struct btrfs_shared_data_ref { | |
479 | __le32 count; | |
480 | } __attribute__ ((__packed__)); | |
481 | ||
482 | struct btrfs_extent_inline_ref { | |
483 | u8 type; | |
484 | u64 offset; | |
485 | } __attribute__ ((__packed__)); | |
486 | ||
487 | /* old style backrefs item */ | |
488 | struct btrfs_extent_ref_v0 { | |
74493f7a CM |
489 | __le64 root; |
490 | __le64 generation; | |
491 | __le64 objectid; | |
5d4f98a2 | 492 | __le32 count; |
62e2749e CM |
493 | } __attribute__ ((__packed__)); |
494 | ||
5d4f98a2 | 495 | |
0b86a832 CM |
496 | /* dev extents record free space on individual devices. The owner |
497 | * field points back to the chunk allocation mapping tree that allocated | |
e17cade2 | 498 | * the extent. The chunk tree uuid field is a way to double check the owner |
0b86a832 CM |
499 | */ |
500 | struct btrfs_dev_extent { | |
e17cade2 CM |
501 | __le64 chunk_tree; |
502 | __le64 chunk_objectid; | |
503 | __le64 chunk_offset; | |
0b86a832 | 504 | __le64 length; |
e17cade2 | 505 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
506 | } __attribute__ ((__packed__)); |
507 | ||
3954401f | 508 | struct btrfs_inode_ref { |
aec7477b | 509 | __le64 index; |
3954401f CM |
510 | __le16 name_len; |
511 | /* name goes here */ | |
512 | } __attribute__ ((__packed__)); | |
513 | ||
0b86a832 | 514 | struct btrfs_timespec { |
f254e52c | 515 | __le64 sec; |
1e1d2701 CM |
516 | __le32 nsec; |
517 | } __attribute__ ((__packed__)); | |
518 | ||
95029d7d | 519 | enum btrfs_compression_type { |
c8b97818 CM |
520 | BTRFS_COMPRESS_NONE = 0, |
521 | BTRFS_COMPRESS_ZLIB = 1, | |
522 | BTRFS_COMPRESS_LAST = 2, | |
95029d7d | 523 | }; |
c8b97818 | 524 | |
1e1d2701 | 525 | struct btrfs_inode_item { |
e02119d5 | 526 | /* nfs style generation number */ |
1e1d2701 | 527 | __le64 generation; |
e02119d5 CM |
528 | /* transid that last touched this inode */ |
529 | __le64 transid; | |
1e1d2701 | 530 | __le64 size; |
a76a3cd4 | 531 | __le64 nbytes; |
31f3c99b | 532 | __le64 block_group; |
1e1d2701 CM |
533 | __le32 nlink; |
534 | __le32 uid; | |
535 | __le32 gid; | |
536 | __le32 mode; | |
0b86a832 | 537 | __le64 rdev; |
f2b636e8 | 538 | __le64 flags; |
c8b97818 | 539 | |
c3027eb5 CM |
540 | /* modification sequence number for NFS */ |
541 | __le64 sequence; | |
542 | ||
543 | /* | |
544 | * a little future expansion, for more than this we can | |
545 | * just grow the inode item and version it | |
546 | */ | |
547 | __le64 reserved[4]; | |
0b86a832 CM |
548 | struct btrfs_timespec atime; |
549 | struct btrfs_timespec ctime; | |
550 | struct btrfs_timespec mtime; | |
551 | struct btrfs_timespec otime; | |
1e1d2701 CM |
552 | } __attribute__ ((__packed__)); |
553 | ||
e02119d5 CM |
554 | struct btrfs_dir_log_item { |
555 | __le64 end; | |
556 | } __attribute__ ((__packed__)); | |
557 | ||
62e2749e | 558 | struct btrfs_dir_item { |
d6e4a428 | 559 | struct btrfs_disk_key location; |
e02119d5 | 560 | __le64 transid; |
5103e947 | 561 | __le16 data_len; |
a8a2ee0c | 562 | __le16 name_len; |
62e2749e CM |
563 | u8 type; |
564 | } __attribute__ ((__packed__)); | |
565 | ||
566 | struct btrfs_root_item { | |
d6e4a428 | 567 | struct btrfs_inode_item inode; |
84234f3a | 568 | __le64 generation; |
d6e4a428 | 569 | __le64 root_dirid; |
db94535d CM |
570 | __le64 bytenr; |
571 | __le64 byte_limit; | |
572 | __le64 bytes_used; | |
80ff3856 | 573 | __le64 last_snapshot; |
f2b636e8 | 574 | __le64 flags; |
62e2749e | 575 | __le32 refs; |
5eda7b5e CM |
576 | struct btrfs_disk_key drop_progress; |
577 | u8 drop_level; | |
db94535d | 578 | u8 level; |
9f5fae2f | 579 | } __attribute__ ((__packed__)); |
62e2749e | 580 | |
0660b5af CM |
581 | /* |
582 | * this is used for both forward and backward root refs | |
583 | */ | |
584 | struct btrfs_root_ref { | |
585 | __le64 dirid; | |
586 | __le64 sequence; | |
587 | __le16 name_len; | |
588 | } __attribute__ ((__packed__)); | |
589 | ||
d899e052 YZ |
590 | #define BTRFS_FILE_EXTENT_INLINE 0 |
591 | #define BTRFS_FILE_EXTENT_REG 1 | |
592 | #define BTRFS_FILE_EXTENT_PREALLOC 2 | |
236454df | 593 | |
9f5fae2f | 594 | struct btrfs_file_extent_item { |
c8b97818 CM |
595 | /* |
596 | * transaction id that created this extent | |
597 | */ | |
71951f35 | 598 | __le64 generation; |
c8b97818 CM |
599 | /* |
600 | * max number of bytes to hold this extent in ram | |
601 | * when we split a compressed extent we can't know how big | |
602 | * each of the resulting pieces will be. So, this is | |
603 | * an upper limit on the size of the extent in ram instead of | |
604 | * an exact limit. | |
605 | */ | |
606 | __le64 ram_bytes; | |
607 | ||
608 | /* | |
609 | * 32 bits for the various ways we might encode the data, | |
610 | * including compression and encryption. If any of these | |
611 | * are set to something a given disk format doesn't understand | |
612 | * it is treated like an incompat flag for reading and writing, | |
613 | * but not for stat. | |
614 | */ | |
615 | u8 compression; | |
616 | u8 encryption; | |
617 | __le16 other_encoding; /* spare for later use */ | |
618 | ||
619 | /* are we inline data or a real extent? */ | |
236454df | 620 | u8 type; |
c8b97818 | 621 | |
9f5fae2f CM |
622 | /* |
623 | * disk space consumed by the extent, checksum blocks are included | |
624 | * in these numbers | |
625 | */ | |
db94535d CM |
626 | __le64 disk_bytenr; |
627 | __le64 disk_num_bytes; | |
9f5fae2f | 628 | /* |
dee26a9f | 629 | * the logical offset in file blocks (no csums) |
9f5fae2f CM |
630 | * this extent record is for. This allows a file extent to point |
631 | * into the middle of an existing extent on disk, sharing it | |
632 | * between two snapshots (useful if some bytes in the middle of the | |
633 | * extent have changed | |
634 | */ | |
635 | __le64 offset; | |
636 | /* | |
c8b97818 CM |
637 | * the logical number of file blocks (no csums included). This |
638 | * always reflects the size uncompressed and without encoding. | |
9f5fae2f | 639 | */ |
db94535d | 640 | __le64 num_bytes; |
c8b97818 | 641 | |
9f5fae2f CM |
642 | } __attribute__ ((__packed__)); |
643 | ||
f254e52c | 644 | struct btrfs_csum_item { |
509659cd | 645 | u8 csum; |
f254e52c CM |
646 | } __attribute__ ((__packed__)); |
647 | ||
0b86a832 CM |
648 | /* different types of block groups (and chunks) */ |
649 | #define BTRFS_BLOCK_GROUP_DATA (1 << 0) | |
650 | #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1) | |
651 | #define BTRFS_BLOCK_GROUP_METADATA (1 << 2) | |
593060d7 | 652 | #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3) |
8790d502 | 653 | #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4) |
611f0e00 | 654 | #define BTRFS_BLOCK_GROUP_DUP (1 << 5) |
321aecc6 | 655 | #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6) |
1e2677e0 | 656 | |
9078a3e1 CM |
657 | struct btrfs_block_group_item { |
658 | __le64 used; | |
0b86a832 CM |
659 | __le64 chunk_objectid; |
660 | __le64 flags; | |
9078a3e1 CM |
661 | } __attribute__ ((__packed__)); |
662 | ||
6324fbf3 CM |
663 | struct btrfs_space_info { |
664 | u64 flags; | |
6a63209f JB |
665 | |
666 | u64 total_bytes; /* total bytes in the space */ | |
667 | u64 bytes_used; /* total bytes used on disk */ | |
668 | u64 bytes_pinned; /* total bytes pinned, will be freed when the | |
669 | transaction finishes */ | |
670 | u64 bytes_reserved; /* total bytes the allocator has reserved for | |
671 | current allocations */ | |
672 | u64 bytes_readonly; /* total bytes that are read only */ | |
673 | ||
674 | /* delalloc accounting */ | |
675 | u64 bytes_delalloc; /* number of bytes reserved for allocation, | |
676 | this space is not necessarily reserved yet | |
677 | by the allocator */ | |
678 | u64 bytes_may_use; /* number of bytes that may be used for | |
679 | delalloc */ | |
680 | ||
681 | int full; /* indicates that we cannot allocate any more | |
682 | chunks for this space */ | |
683 | int force_alloc; /* set if we need to force a chunk alloc for | |
684 | this space */ | |
685 | ||
6324fbf3 | 686 | struct list_head list; |
0f9dd46c JB |
687 | |
688 | /* for block groups in our same type */ | |
689 | struct list_head block_groups; | |
690 | spinlock_t lock; | |
80eb234a | 691 | struct rw_semaphore groups_sem; |
0f9dd46c JB |
692 | }; |
693 | ||
fa9c0d79 CM |
694 | /* |
695 | * free clusters are used to claim free space in relatively large chunks, | |
696 | * allowing us to do less seeky writes. They are used for all metadata | |
697 | * allocations and data allocations in ssd mode. | |
698 | */ | |
699 | struct btrfs_free_cluster { | |
700 | spinlock_t lock; | |
701 | spinlock_t refill_lock; | |
702 | struct rb_root root; | |
703 | ||
704 | /* largest extent in this cluster */ | |
705 | u64 max_size; | |
706 | ||
707 | /* first extent starting offset */ | |
708 | u64 window_start; | |
709 | ||
710 | struct btrfs_block_group_cache *block_group; | |
711 | /* | |
712 | * when a cluster is allocated from a block group, we put the | |
713 | * cluster onto a list in the block group so that it can | |
714 | * be freed before the block group is freed. | |
715 | */ | |
716 | struct list_head block_group_list; | |
6324fbf3 CM |
717 | }; |
718 | ||
9078a3e1 CM |
719 | struct btrfs_block_group_cache { |
720 | struct btrfs_key key; | |
721 | struct btrfs_block_group_item item; | |
c286ac48 | 722 | spinlock_t lock; |
ea6a478e | 723 | struct mutex cache_mutex; |
324ae4df | 724 | u64 pinned; |
e8569813 | 725 | u64 reserved; |
0b86a832 CM |
726 | u64 flags; |
727 | int cached; | |
8f18cf13 | 728 | int ro; |
0f9dd46c JB |
729 | int dirty; |
730 | ||
731 | struct btrfs_space_info *space_info; | |
732 | ||
733 | /* free space cache stuff */ | |
6226cb0a | 734 | spinlock_t tree_lock; |
0f9dd46c JB |
735 | struct rb_root free_space_bytes; |
736 | struct rb_root free_space_offset; | |
737 | ||
738 | /* block group cache stuff */ | |
739 | struct rb_node cache_node; | |
740 | ||
741 | /* for block groups in the same raid type */ | |
742 | struct list_head list; | |
d2fb3437 YZ |
743 | |
744 | /* usage count */ | |
745 | atomic_t count; | |
fa9c0d79 CM |
746 | |
747 | /* List of struct btrfs_free_clusters for this block group. | |
748 | * Today it will only have one thing on it, but that may change | |
749 | */ | |
750 | struct list_head cluster_list; | |
9078a3e1 | 751 | }; |
0b86a832 | 752 | |
5d4f98a2 | 753 | struct reloc_control; |
0b86a832 | 754 | struct btrfs_device; |
8a4b83cc | 755 | struct btrfs_fs_devices; |
9f5fae2f | 756 | struct btrfs_fs_info { |
5f39d397 | 757 | u8 fsid[BTRFS_FSID_SIZE]; |
e17cade2 | 758 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
62e2749e CM |
759 | struct btrfs_root *extent_root; |
760 | struct btrfs_root *tree_root; | |
0b86a832 CM |
761 | struct btrfs_root *chunk_root; |
762 | struct btrfs_root *dev_root; | |
3de4586c | 763 | struct btrfs_root *fs_root; |
d20f7043 | 764 | struct btrfs_root *csum_root; |
e02119d5 CM |
765 | |
766 | /* the log root tree is a directory of all the other log roots */ | |
767 | struct btrfs_root *log_root_tree; | |
0f7d52f4 | 768 | struct radix_tree_root fs_roots_radix; |
1a5bc167 | 769 | |
0f9dd46c JB |
770 | /* block group cache stuff */ |
771 | spinlock_t block_group_cache_lock; | |
772 | struct rb_root block_group_cache_tree; | |
773 | ||
d1310b2e | 774 | struct extent_io_tree pinned_extents; |
1a5bc167 | 775 | |
0b86a832 CM |
776 | /* logical->physical extent mapping */ |
777 | struct btrfs_mapping_tree mapping_tree; | |
778 | ||
293ffd5f | 779 | u64 generation; |
15ee9bc7 | 780 | u64 last_trans_committed; |
12fcfd22 CM |
781 | |
782 | /* | |
783 | * this is updated to the current trans every time a full commit | |
784 | * is required instead of the faster short fsync log commits | |
785 | */ | |
786 | u64 last_trans_log_full_commit; | |
9ca9ee09 | 787 | u64 open_ioctl_trans; |
b6cda9bc | 788 | unsigned long mount_opt; |
c59f8951 | 789 | u64 max_extent; |
6f568d35 | 790 | u64 max_inline; |
8f662a76 | 791 | u64 alloc_start; |
79154b1b | 792 | struct btrfs_transaction *running_transaction; |
e6dcd2dc | 793 | wait_queue_head_t transaction_throttle; |
f9295749 | 794 | wait_queue_head_t transaction_wait; |
771ed689 | 795 | wait_queue_head_t async_submit_wait; |
e02119d5 | 796 | |
4b52dff6 | 797 | struct btrfs_super_block super_copy; |
a061fc8d | 798 | struct btrfs_super_block super_for_commit; |
0b86a832 | 799 | struct block_device *__bdev; |
e20d96d6 | 800 | struct super_block *sb; |
d98237b3 | 801 | struct inode *btree_inode; |
04160088 | 802 | struct backing_dev_info bdi; |
79154b1b | 803 | struct mutex trans_mutex; |
e02119d5 | 804 | struct mutex tree_log_mutex; |
a74a4b97 CM |
805 | struct mutex transaction_kthread_mutex; |
806 | struct mutex cleaner_mutex; | |
925baedd | 807 | struct mutex chunk_mutex; |
a2135011 | 808 | struct mutex drop_mutex; |
7d9eb12c | 809 | struct mutex volume_mutex; |
1a40e23b | 810 | struct mutex tree_reloc_mutex; |
c3e69d58 | 811 | |
5a3f23d5 CM |
812 | /* |
813 | * this protects the ordered operations list only while we are | |
814 | * processing all of the entries on it. This way we make | |
815 | * sure the commit code doesn't find the list temporarily empty | |
816 | * because another function happens to be doing non-waiting preflush | |
817 | * before jumping into the main commit. | |
818 | */ | |
819 | struct mutex ordered_operations_mutex; | |
820 | ||
8fd17795 | 821 | struct list_head trans_list; |
19c00ddc | 822 | struct list_head hashers; |
facda1e7 | 823 | struct list_head dead_roots; |
e02119d5 | 824 | |
cb03c743 | 825 | atomic_t nr_async_submits; |
8c8bee1d | 826 | atomic_t async_submit_draining; |
0986fe9e | 827 | atomic_t nr_async_bios; |
771ed689 | 828 | atomic_t async_delalloc_pages; |
ce9adaa5 | 829 | |
3eaa2885 CM |
830 | /* |
831 | * this is used by the balancing code to wait for all the pending | |
832 | * ordered extents | |
833 | */ | |
834 | spinlock_t ordered_extent_lock; | |
5a3f23d5 CM |
835 | |
836 | /* | |
837 | * all of the data=ordered extents pending writeback | |
838 | * these can span multiple transactions and basically include | |
839 | * every dirty data page that isn't from nodatacow | |
840 | */ | |
3eaa2885 | 841 | struct list_head ordered_extents; |
5a3f23d5 CM |
842 | |
843 | /* | |
844 | * all of the inodes that have delalloc bytes. It is possible for | |
845 | * this list to be empty even when there is still dirty data=ordered | |
846 | * extents waiting to finish IO. | |
847 | */ | |
ea8c2819 | 848 | struct list_head delalloc_inodes; |
3eaa2885 | 849 | |
5a3f23d5 CM |
850 | /* |
851 | * special rename and truncate targets that must be on disk before | |
852 | * we're allowed to commit. This is basically the ext3 style | |
853 | * data=ordered list. | |
854 | */ | |
855 | struct list_head ordered_operations; | |
856 | ||
8b712842 CM |
857 | /* |
858 | * there is a pool of worker threads for checksumming during writes | |
859 | * and a pool for checksumming after reads. This is because readers | |
860 | * can run with FS locks held, and the writers may be waiting for | |
861 | * those locks. We don't want ordering in the pending list to cause | |
862 | * deadlocks, and so the two are serviced separately. | |
1cc127b5 CM |
863 | * |
864 | * A third pool does submit_bio to avoid deadlocking with the other | |
865 | * two | |
8b712842 CM |
866 | */ |
867 | struct btrfs_workers workers; | |
771ed689 | 868 | struct btrfs_workers delalloc_workers; |
8b712842 | 869 | struct btrfs_workers endio_workers; |
d20f7043 | 870 | struct btrfs_workers endio_meta_workers; |
cad321ad | 871 | struct btrfs_workers endio_meta_write_workers; |
e6dcd2dc | 872 | struct btrfs_workers endio_write_workers; |
1cc127b5 | 873 | struct btrfs_workers submit_workers; |
247e743c CM |
874 | /* |
875 | * fixup workers take dirty pages that didn't properly go through | |
876 | * the cow mechanism and make them safe to write. It happens | |
877 | * for the sys_munmap function call path | |
878 | */ | |
879 | struct btrfs_workers fixup_workers; | |
a74a4b97 CM |
880 | struct task_struct *transaction_kthread; |
881 | struct task_struct *cleaner_kthread; | |
4543df7e | 882 | int thread_pool_size; |
8b712842 | 883 | |
58176a96 JB |
884 | struct kobject super_kobj; |
885 | struct completion kobj_unregister; | |
e66f709b | 886 | int do_barriers; |
facda1e7 | 887 | int closing; |
e02119d5 | 888 | int log_root_recovering; |
9f5fae2f | 889 | |
324ae4df | 890 | u64 total_pinned; |
b9473439 CM |
891 | |
892 | /* protected by the delalloc lock, used to keep from writing | |
893 | * metadata until there is a nice batch | |
894 | */ | |
895 | u64 dirty_metadata_bytes; | |
0b86a832 CM |
896 | struct list_head dirty_cowonly_roots; |
897 | ||
8a4b83cc | 898 | struct btrfs_fs_devices *fs_devices; |
4184ea7f CM |
899 | |
900 | /* | |
901 | * the space_info list is almost entirely read only. It only changes | |
902 | * when we add a new raid type to the FS, and that happens | |
903 | * very rarely. RCU is used to protect it. | |
904 | */ | |
6324fbf3 | 905 | struct list_head space_info; |
4184ea7f | 906 | |
5d4f98a2 YZ |
907 | struct reloc_control *reloc_ctl; |
908 | ||
1832a6d5 | 909 | spinlock_t delalloc_lock; |
cee36a03 | 910 | spinlock_t new_trans_lock; |
1832a6d5 | 911 | u64 delalloc_bytes; |
fa9c0d79 CM |
912 | |
913 | /* data_alloc_cluster is only used in ssd mode */ | |
914 | struct btrfs_free_cluster data_alloc_cluster; | |
915 | ||
916 | /* all metadata allocations go through this cluster */ | |
917 | struct btrfs_free_cluster meta_alloc_cluster; | |
d18a2c44 | 918 | |
31153d81 YZ |
919 | spinlock_t ref_cache_lock; |
920 | u64 total_ref_cache_size; | |
31153d81 | 921 | |
d18a2c44 CM |
922 | u64 avail_data_alloc_bits; |
923 | u64 avail_metadata_alloc_bits; | |
924 | u64 avail_system_alloc_bits; | |
925 | u64 data_alloc_profile; | |
926 | u64 metadata_alloc_profile; | |
927 | u64 system_alloc_profile; | |
788f20eb | 928 | |
97e728d4 JB |
929 | unsigned data_chunk_allocations; |
930 | unsigned metadata_ratio; | |
931 | ||
788f20eb | 932 | void *bdev_holder; |
324ae4df | 933 | }; |
0b86a832 | 934 | |
9f5fae2f CM |
935 | /* |
936 | * in ram representation of the tree. extent_root is used for all allocations | |
f2458e1d | 937 | * and for the extent tree extent_root root. |
9f5fae2f CM |
938 | */ |
939 | struct btrfs_root { | |
5f39d397 | 940 | struct extent_buffer *node; |
925baedd CM |
941 | |
942 | /* the node lock is held while changing the node pointer */ | |
943 | spinlock_t node_lock; | |
944 | ||
5f39d397 | 945 | struct extent_buffer *commit_root; |
e02119d5 | 946 | struct btrfs_root *log_root; |
1a40e23b | 947 | struct btrfs_root *reloc_root; |
31153d81 | 948 | |
62e2749e CM |
949 | struct btrfs_root_item root_item; |
950 | struct btrfs_key root_key; | |
9f5fae2f | 951 | struct btrfs_fs_info *fs_info; |
d0c803c4 CM |
952 | struct extent_io_tree dirty_log_pages; |
953 | ||
58176a96 JB |
954 | struct kobject root_kobj; |
955 | struct completion kobj_unregister; | |
a2135011 | 956 | struct mutex objectid_mutex; |
7237f183 | 957 | |
e02119d5 | 958 | struct mutex log_mutex; |
7237f183 YZ |
959 | wait_queue_head_t log_writer_wait; |
960 | wait_queue_head_t log_commit_wait[2]; | |
961 | atomic_t log_writers; | |
962 | atomic_t log_commit[2]; | |
963 | unsigned long log_transid; | |
964 | unsigned long log_batch; | |
ea8c2819 | 965 | |
0f7d52f4 CM |
966 | u64 objectid; |
967 | u64 last_trans; | |
5f39d397 CM |
968 | |
969 | /* data allocations are done in sectorsize units */ | |
970 | u32 sectorsize; | |
971 | ||
972 | /* node allocations are done in nodesize units */ | |
973 | u32 nodesize; | |
974 | ||
975 | /* leaf allocations are done in leafsize units */ | |
976 | u32 leafsize; | |
977 | ||
87ee04eb CM |
978 | u32 stripesize; |
979 | ||
9f5fae2f | 980 | u32 type; |
1b05da2e CM |
981 | u64 highest_inode; |
982 | u64 last_inode_alloc; | |
9f3a7427 | 983 | int ref_cows; |
0b86a832 | 984 | int track_dirty; |
3f157a2f | 985 | u64 defrag_trans_start; |
6702ed49 | 986 | struct btrfs_key defrag_progress; |
0ef3e66b | 987 | struct btrfs_key defrag_max; |
6702ed49 CM |
988 | int defrag_running; |
989 | int defrag_level; | |
58176a96 | 990 | char *name; |
4313b399 | 991 | int in_sysfs; |
0b86a832 CM |
992 | |
993 | /* the dirty list is only used by non-reference counted roots */ | |
994 | struct list_head dirty_list; | |
7b128766 | 995 | |
5d4f98a2 YZ |
996 | struct list_head root_list; |
997 | ||
bcc63abb | 998 | spinlock_t list_lock; |
7b128766 | 999 | struct list_head orphan_list; |
3394e160 | 1000 | |
5d4f98a2 YZ |
1001 | spinlock_t inode_lock; |
1002 | /* red-black tree that keeps track of in-memory inodes */ | |
1003 | struct rb_root inode_tree; | |
1004 | ||
3394e160 CM |
1005 | /* |
1006 | * right now this just gets used so that a root has its own devid | |
1007 | * for stat. It may be used for more later | |
1008 | */ | |
1009 | struct super_block anon_super; | |
62e2749e CM |
1010 | }; |
1011 | ||
1e1d2701 CM |
1012 | /* |
1013 | * inode items have the data typically returned from stat and store other | |
1014 | * info about object characteristics. There is one for every file and dir in | |
1015 | * the FS | |
1016 | */ | |
9078a3e1 | 1017 | #define BTRFS_INODE_ITEM_KEY 1 |
0660b5af CM |
1018 | #define BTRFS_INODE_REF_KEY 12 |
1019 | #define BTRFS_XATTR_ITEM_KEY 24 | |
1020 | #define BTRFS_ORPHAN_ITEM_KEY 48 | |
9078a3e1 | 1021 | /* reserve 2-15 close to the inode for later flexibility */ |
1e1d2701 CM |
1022 | |
1023 | /* | |
1024 | * dir items are the name -> inode pointers in a directory. There is one | |
1025 | * for every name in a directory. | |
1026 | */ | |
0660b5af CM |
1027 | #define BTRFS_DIR_LOG_ITEM_KEY 60 |
1028 | #define BTRFS_DIR_LOG_INDEX_KEY 72 | |
1029 | #define BTRFS_DIR_ITEM_KEY 84 | |
1030 | #define BTRFS_DIR_INDEX_KEY 96 | |
1e1d2701 | 1031 | /* |
9078a3e1 | 1032 | * extent data is for file data |
1e1d2701 | 1033 | */ |
0660b5af | 1034 | #define BTRFS_EXTENT_DATA_KEY 108 |
d20f7043 | 1035 | |
f254e52c | 1036 | /* |
d20f7043 CM |
1037 | * extent csums are stored in a separate tree and hold csums for |
1038 | * an entire extent on disk. | |
f254e52c | 1039 | */ |
d20f7043 | 1040 | #define BTRFS_EXTENT_CSUM_KEY 128 |
f254e52c | 1041 | |
1e1d2701 | 1042 | /* |
d4a78947 | 1043 | * root items point to tree roots. They are typically in the root |
1e1d2701 CM |
1044 | * tree used by the super block to find all the other trees |
1045 | */ | |
0660b5af CM |
1046 | #define BTRFS_ROOT_ITEM_KEY 132 |
1047 | ||
1048 | /* | |
1049 | * root backrefs tie subvols and snapshots to the directory entries that | |
1050 | * reference them | |
1051 | */ | |
1052 | #define BTRFS_ROOT_BACKREF_KEY 144 | |
1053 | ||
1054 | /* | |
1055 | * root refs make a fast index for listing all of the snapshots and | |
1056 | * subvolumes referenced by a given root. They point directly to the | |
1057 | * directory item in the root that references the subvol | |
1058 | */ | |
1059 | #define BTRFS_ROOT_REF_KEY 156 | |
1060 | ||
1e1d2701 CM |
1061 | /* |
1062 | * extent items are in the extent map tree. These record which blocks | |
1063 | * are used, and how many references there are to each block | |
1064 | */ | |
0660b5af | 1065 | #define BTRFS_EXTENT_ITEM_KEY 168 |
5d4f98a2 YZ |
1066 | |
1067 | #define BTRFS_TREE_BLOCK_REF_KEY 176 | |
1068 | ||
1069 | #define BTRFS_EXTENT_DATA_REF_KEY 178 | |
1070 | ||
1071 | #define BTRFS_EXTENT_REF_V0_KEY 180 | |
1072 | ||
1073 | #define BTRFS_SHARED_BLOCK_REF_KEY 182 | |
1074 | ||
1075 | #define BTRFS_SHARED_DATA_REF_KEY 184 | |
9078a3e1 CM |
1076 | |
1077 | /* | |
1078 | * block groups give us hints into the extent allocation trees. Which | |
1079 | * blocks are free etc etc | |
1080 | */ | |
0660b5af | 1081 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 192 |
9f5fae2f | 1082 | |
0660b5af CM |
1083 | #define BTRFS_DEV_EXTENT_KEY 204 |
1084 | #define BTRFS_DEV_ITEM_KEY 216 | |
1085 | #define BTRFS_CHUNK_ITEM_KEY 228 | |
0b86a832 | 1086 | |
1e1d2701 CM |
1087 | /* |
1088 | * string items are for debugging. They just store a short string of | |
1089 | * data in the FS | |
1090 | */ | |
9078a3e1 CM |
1091 | #define BTRFS_STRING_ITEM_KEY 253 |
1092 | ||
21ad10cf CM |
1093 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
1094 | #define BTRFS_MOUNT_NODATACOW (1 << 1) | |
1095 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) | |
e18e4809 | 1096 | #define BTRFS_MOUNT_SSD (1 << 3) |
dfe25020 | 1097 | #define BTRFS_MOUNT_DEGRADED (1 << 4) |
c8b97818 | 1098 | #define BTRFS_MOUNT_COMPRESS (1 << 5) |
3a5e1404 | 1099 | #define BTRFS_MOUNT_NOTREELOG (1 << 6) |
dccae999 | 1100 | #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) |
451d7585 | 1101 | #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) |
c289811c | 1102 | #define BTRFS_MOUNT_NOSSD (1 << 9) |
b6cda9bc CM |
1103 | |
1104 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) | |
1105 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) | |
1106 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ | |
1107 | BTRFS_MOUNT_##opt) | |
b98b6767 Y |
1108 | /* |
1109 | * Inode flags | |
1110 | */ | |
fdebe2bd Y |
1111 | #define BTRFS_INODE_NODATASUM (1 << 0) |
1112 | #define BTRFS_INODE_NODATACOW (1 << 1) | |
1113 | #define BTRFS_INODE_READONLY (1 << 2) | |
c8b97818 | 1114 | #define BTRFS_INODE_NOCOMPRESS (1 << 3) |
d899e052 | 1115 | #define BTRFS_INODE_PREALLOC (1 << 4) |
6cbff00f CH |
1116 | #define BTRFS_INODE_SYNC (1 << 5) |
1117 | #define BTRFS_INODE_IMMUTABLE (1 << 6) | |
1118 | #define BTRFS_INODE_APPEND (1 << 7) | |
1119 | #define BTRFS_INODE_NODUMP (1 << 8) | |
1120 | #define BTRFS_INODE_NOATIME (1 << 9) | |
1121 | #define BTRFS_INODE_DIRSYNC (1 << 10) | |
1122 | ||
1123 | ||
5f39d397 CM |
1124 | /* some macros to generate set/get funcs for the struct fields. This |
1125 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | |
1126 | * one for u8: | |
1127 | */ | |
1128 | #define le8_to_cpu(v) (v) | |
1129 | #define cpu_to_le8(v) (v) | |
1130 | #define __le8 u8 | |
1131 | ||
1132 | #define read_eb_member(eb, ptr, type, member, result) ( \ | |
1133 | read_extent_buffer(eb, (char *)(result), \ | |
1134 | ((unsigned long)(ptr)) + \ | |
1135 | offsetof(type, member), \ | |
1136 | sizeof(((type *)0)->member))) | |
1137 | ||
1138 | #define write_eb_member(eb, ptr, type, member, result) ( \ | |
1139 | write_extent_buffer(eb, (char *)(result), \ | |
1140 | ((unsigned long)(ptr)) + \ | |
1141 | offsetof(type, member), \ | |
1142 | sizeof(((type *)0)->member))) | |
1143 | ||
0f82731f | 1144 | #ifndef BTRFS_SETGET_FUNCS |
5f39d397 | 1145 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
0f82731f CM |
1146 | u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ |
1147 | void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); | |
1148 | #endif | |
5f39d397 CM |
1149 | |
1150 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | |
1151 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | |
1152 | { \ | |
df68b8a7 DM |
1153 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
1154 | u##bits res = le##bits##_to_cpu(p->member); \ | |
1155 | kunmap_atomic(p, KM_USER0); \ | |
810191ff | 1156 | return res; \ |
5f39d397 CM |
1157 | } \ |
1158 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
1159 | u##bits val) \ | |
1160 | { \ | |
df68b8a7 DM |
1161 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
1162 | p->member = cpu_to_le##bits(val); \ | |
1163 | kunmap_atomic(p, KM_USER0); \ | |
5f39d397 | 1164 | } |
9078a3e1 | 1165 | |
5f39d397 CM |
1166 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
1167 | static inline u##bits btrfs_##name(type *s) \ | |
1168 | { \ | |
1169 | return le##bits##_to_cpu(s->member); \ | |
1170 | } \ | |
1171 | static inline void btrfs_set_##name(type *s, u##bits val) \ | |
1172 | { \ | |
1173 | s->member = cpu_to_le##bits(val); \ | |
1e1d2701 CM |
1174 | } |
1175 | ||
0b86a832 CM |
1176 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
1177 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); | |
1178 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); | |
1179 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); | |
1180 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); | |
c3027eb5 CM |
1181 | BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, |
1182 | start_offset, 64); | |
0b86a832 CM |
1183 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); |
1184 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
1185 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); |
1186 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); | |
1187 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); | |
2b82032c | 1188 | BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); |
0b86a832 | 1189 | |
8a4b83cc CM |
1190 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
1191 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, | |
1192 | total_bytes, 64); | |
1193 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, | |
1194 | bytes_used, 64); | |
1195 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, | |
1196 | io_align, 32); | |
1197 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, | |
1198 | io_width, 32); | |
1199 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, | |
1200 | sector_size, 32); | |
1201 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
1202 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, |
1203 | dev_group, 32); | |
1204 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, | |
1205 | seek_speed, 8); | |
1206 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, | |
1207 | bandwidth, 8); | |
2b82032c YZ |
1208 | BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, |
1209 | generation, 64); | |
8a4b83cc | 1210 | |
0b86a832 CM |
1211 | static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) |
1212 | { | |
1213 | return (char *)d + offsetof(struct btrfs_dev_item, uuid); | |
1214 | } | |
1215 | ||
2b82032c YZ |
1216 | static inline char *btrfs_device_fsid(struct btrfs_dev_item *d) |
1217 | { | |
1218 | return (char *)d + offsetof(struct btrfs_dev_item, fsid); | |
1219 | } | |
1220 | ||
e17cade2 | 1221 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
0b86a832 CM |
1222 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
1223 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); | |
1224 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); | |
1225 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); | |
1226 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); | |
1227 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); | |
1228 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); | |
321aecc6 | 1229 | BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); |
0b86a832 CM |
1230 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
1231 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); | |
1232 | ||
e17cade2 CM |
1233 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
1234 | { | |
1235 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); | |
1236 | } | |
1237 | ||
1238 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); | |
0b86a832 CM |
1239 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
1240 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, | |
1241 | stripe_len, 64); | |
1242 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, | |
1243 | io_align, 32); | |
1244 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, | |
1245 | io_width, 32); | |
1246 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, | |
1247 | sector_size, 32); | |
1248 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); | |
1249 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, | |
1250 | num_stripes, 16); | |
321aecc6 CM |
1251 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, |
1252 | sub_stripes, 16); | |
0b86a832 CM |
1253 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
1254 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); | |
1255 | ||
1256 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, | |
1257 | int nr) | |
1258 | { | |
1259 | unsigned long offset = (unsigned long)c; | |
1260 | offset += offsetof(struct btrfs_chunk, stripe); | |
1261 | offset += nr * sizeof(struct btrfs_stripe); | |
1262 | return (struct btrfs_stripe *)offset; | |
1263 | } | |
1264 | ||
a443755f CM |
1265 | static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) |
1266 | { | |
1267 | return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); | |
1268 | } | |
1269 | ||
0b86a832 CM |
1270 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
1271 | struct btrfs_chunk *c, int nr) | |
1272 | { | |
1273 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); | |
1274 | } | |
1275 | ||
1276 | static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, | |
1277 | struct btrfs_chunk *c, int nr, | |
1278 | u64 val) | |
1279 | { | |
1280 | btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); | |
1281 | } | |
1282 | ||
1283 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, | |
1284 | struct btrfs_chunk *c, int nr) | |
1285 | { | |
1286 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); | |
1287 | } | |
1288 | ||
1289 | static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, | |
1290 | struct btrfs_chunk *c, int nr, | |
1291 | u64 val) | |
1292 | { | |
1293 | btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); | |
1294 | } | |
1295 | ||
5f39d397 CM |
1296 | /* struct btrfs_block_group_item */ |
1297 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | |
1298 | used, 64); | |
1299 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | |
1300 | used, 64); | |
0b86a832 CM |
1301 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
1302 | struct btrfs_block_group_item, chunk_objectid, 64); | |
e17cade2 CM |
1303 | |
1304 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, | |
0b86a832 CM |
1305 | struct btrfs_block_group_item, chunk_objectid, 64); |
1306 | BTRFS_SETGET_FUNCS(disk_block_group_flags, | |
1307 | struct btrfs_block_group_item, flags, 64); | |
1308 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, | |
1309 | struct btrfs_block_group_item, flags, 64); | |
1e1d2701 | 1310 | |
3954401f CM |
1311 | /* struct btrfs_inode_ref */ |
1312 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); | |
aec7477b | 1313 | BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); |
3954401f | 1314 | |
5f39d397 CM |
1315 | /* struct btrfs_inode_item */ |
1316 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | |
c3027eb5 | 1317 | BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); |
e02119d5 | 1318 | BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); |
5f39d397 | 1319 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); |
a76a3cd4 | 1320 | BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); |
5f39d397 CM |
1321 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); |
1322 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | |
1323 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | |
1324 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | |
1325 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | |
0b86a832 | 1326 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
f2b636e8 | 1327 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); |
1e1d2701 | 1328 | |
0b86a832 | 1329 | static inline struct btrfs_timespec * |
5f39d397 | 1330 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1331 | { |
5f39d397 CM |
1332 | unsigned long ptr = (unsigned long)inode_item; |
1333 | ptr += offsetof(struct btrfs_inode_item, atime); | |
0b86a832 | 1334 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1335 | } |
1336 | ||
0b86a832 | 1337 | static inline struct btrfs_timespec * |
5f39d397 | 1338 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1339 | { |
5f39d397 CM |
1340 | unsigned long ptr = (unsigned long)inode_item; |
1341 | ptr += offsetof(struct btrfs_inode_item, mtime); | |
0b86a832 | 1342 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1343 | } |
1344 | ||
0b86a832 | 1345 | static inline struct btrfs_timespec * |
5f39d397 | 1346 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1347 | { |
5f39d397 CM |
1348 | unsigned long ptr = (unsigned long)inode_item; |
1349 | ptr += offsetof(struct btrfs_inode_item, ctime); | |
0b86a832 | 1350 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1351 | } |
1352 | ||
0b86a832 | 1353 | static inline struct btrfs_timespec * |
5f39d397 | 1354 | btrfs_inode_otime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1355 | { |
5f39d397 CM |
1356 | unsigned long ptr = (unsigned long)inode_item; |
1357 | ptr += offsetof(struct btrfs_inode_item, otime); | |
0b86a832 | 1358 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1359 | } |
1360 | ||
0b86a832 CM |
1361 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
1362 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); | |
e20d96d6 | 1363 | |
0b86a832 | 1364 | /* struct btrfs_dev_extent */ |
e17cade2 CM |
1365 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
1366 | chunk_tree, 64); | |
1367 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, | |
1368 | chunk_objectid, 64); | |
1369 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, | |
1370 | chunk_offset, 64); | |
0b86a832 CM |
1371 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
1372 | ||
e17cade2 CM |
1373 | static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
1374 | { | |
1375 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); | |
1376 | return (u8 *)((unsigned long)dev + ptr); | |
1377 | } | |
1378 | ||
5d4f98a2 YZ |
1379 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); |
1380 | BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, | |
1381 | generation, 64); | |
1382 | BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); | |
74493f7a | 1383 | |
5d4f98a2 YZ |
1384 | BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); |
1385 | ||
1386 | ||
1387 | BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); | |
1388 | ||
1389 | static inline void btrfs_tree_block_key(struct extent_buffer *eb, | |
1390 | struct btrfs_tree_block_info *item, | |
1391 | struct btrfs_disk_key *key) | |
1392 | { | |
1393 | read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
1394 | } | |
1395 | ||
1396 | static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, | |
1397 | struct btrfs_tree_block_info *item, | |
1398 | struct btrfs_disk_key *key) | |
1399 | { | |
1400 | write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
1401 | } | |
e20d96d6 | 1402 | |
5d4f98a2 YZ |
1403 | BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, |
1404 | root, 64); | |
1405 | BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, | |
1406 | objectid, 64); | |
1407 | BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, | |
1408 | offset, 64); | |
1409 | BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, | |
1410 | count, 32); | |
1411 | ||
1412 | BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, | |
1413 | count, 32); | |
1414 | ||
1415 | BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, | |
1416 | type, 8); | |
1417 | BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, | |
1418 | offset, 64); | |
1419 | ||
1420 | static inline u32 btrfs_extent_inline_ref_size(int type) | |
1421 | { | |
1422 | if (type == BTRFS_TREE_BLOCK_REF_KEY || | |
1423 | type == BTRFS_SHARED_BLOCK_REF_KEY) | |
1424 | return sizeof(struct btrfs_extent_inline_ref); | |
1425 | if (type == BTRFS_SHARED_DATA_REF_KEY) | |
1426 | return sizeof(struct btrfs_shared_data_ref) + | |
1427 | sizeof(struct btrfs_extent_inline_ref); | |
1428 | if (type == BTRFS_EXTENT_DATA_REF_KEY) | |
1429 | return sizeof(struct btrfs_extent_data_ref) + | |
1430 | offsetof(struct btrfs_extent_inline_ref, offset); | |
1431 | BUG(); | |
1432 | return 0; | |
1433 | } | |
1434 | ||
1435 | BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); | |
1436 | BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, | |
1437 | generation, 64); | |
1438 | BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); | |
1439 | BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); | |
e20d96d6 | 1440 | |
5f39d397 CM |
1441 | /* struct btrfs_node */ |
1442 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | |
74493f7a | 1443 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
e20d96d6 | 1444 | |
5f39d397 | 1445 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
cf27e1ee | 1446 | { |
5f39d397 CM |
1447 | unsigned long ptr; |
1448 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1449 | sizeof(struct btrfs_key_ptr) * nr; | |
1450 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | |
cf27e1ee CM |
1451 | } |
1452 | ||
5f39d397 CM |
1453 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
1454 | int nr, u64 val) | |
cf27e1ee | 1455 | { |
5f39d397 CM |
1456 | unsigned long ptr; |
1457 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1458 | sizeof(struct btrfs_key_ptr) * nr; | |
1459 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | |
cf27e1ee CM |
1460 | } |
1461 | ||
74493f7a CM |
1462 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
1463 | { | |
1464 | unsigned long ptr; | |
1465 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1466 | sizeof(struct btrfs_key_ptr) * nr; | |
1467 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); | |
1468 | } | |
1469 | ||
1470 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, | |
1471 | int nr, u64 val) | |
1472 | { | |
1473 | unsigned long ptr; | |
1474 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1475 | sizeof(struct btrfs_key_ptr) * nr; | |
1476 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); | |
1477 | } | |
1478 | ||
810191ff | 1479 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
4d775673 | 1480 | { |
5f39d397 CM |
1481 | return offsetof(struct btrfs_node, ptrs) + |
1482 | sizeof(struct btrfs_key_ptr) * nr; | |
4d775673 CM |
1483 | } |
1484 | ||
e644d021 CM |
1485 | void btrfs_node_key(struct extent_buffer *eb, |
1486 | struct btrfs_disk_key *disk_key, int nr); | |
1487 | ||
5f39d397 CM |
1488 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
1489 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f8a0c | 1490 | { |
5f39d397 CM |
1491 | unsigned long ptr; |
1492 | ptr = btrfs_node_key_ptr_offset(nr); | |
1493 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
1494 | struct btrfs_key_ptr, key, disk_key); | |
1d4f8a0c CM |
1495 | } |
1496 | ||
5f39d397 CM |
1497 | /* struct btrfs_item */ |
1498 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | |
1499 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | |
4d775673 | 1500 | |
5f39d397 | 1501 | static inline unsigned long btrfs_item_nr_offset(int nr) |
1d4f8a0c | 1502 | { |
5f39d397 CM |
1503 | return offsetof(struct btrfs_leaf, items) + |
1504 | sizeof(struct btrfs_item) * nr; | |
1d4f8a0c CM |
1505 | } |
1506 | ||
5f39d397 CM |
1507 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
1508 | int nr) | |
0783fcfc | 1509 | { |
5f39d397 | 1510 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
0783fcfc CM |
1511 | } |
1512 | ||
5f39d397 CM |
1513 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
1514 | struct btrfs_item *item) | |
0783fcfc | 1515 | { |
5f39d397 | 1516 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
0783fcfc CM |
1517 | } |
1518 | ||
5f39d397 | 1519 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1520 | { |
5f39d397 | 1521 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1522 | } |
1523 | ||
5f39d397 | 1524 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1525 | { |
5f39d397 | 1526 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1527 | } |
1528 | ||
5f39d397 | 1529 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1530 | { |
5f39d397 | 1531 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1532 | } |
1533 | ||
5f39d397 CM |
1534 | static inline void btrfs_item_key(struct extent_buffer *eb, |
1535 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 1536 | { |
5f39d397 CM |
1537 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
1538 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
1539 | } |
1540 | ||
5f39d397 CM |
1541 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
1542 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 1543 | { |
5f39d397 CM |
1544 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
1545 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
1546 | } |
1547 | ||
e02119d5 CM |
1548 | BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); |
1549 | ||
0660b5af CM |
1550 | /* |
1551 | * struct btrfs_root_ref | |
1552 | */ | |
1553 | BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); | |
1554 | BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); | |
1555 | BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); | |
1556 | ||
5f39d397 | 1557 | /* struct btrfs_dir_item */ |
5103e947 | 1558 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
5f39d397 CM |
1559 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
1560 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | |
e02119d5 | 1561 | BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); |
1d4f6404 | 1562 | |
5f39d397 CM |
1563 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
1564 | struct btrfs_dir_item *item, | |
1565 | struct btrfs_disk_key *key) | |
1d4f6404 | 1566 | { |
5f39d397 | 1567 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
1d4f6404 CM |
1568 | } |
1569 | ||
5f39d397 CM |
1570 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
1571 | struct btrfs_dir_item *item, | |
1572 | struct btrfs_disk_key *key) | |
a8a2ee0c | 1573 | { |
5f39d397 | 1574 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
a8a2ee0c CM |
1575 | } |
1576 | ||
5f39d397 CM |
1577 | /* struct btrfs_disk_key */ |
1578 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | |
1579 | objectid, 64); | |
1580 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | |
1581 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | |
1d4f6404 | 1582 | |
e2fa7227 CM |
1583 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
1584 | struct btrfs_disk_key *disk) | |
1585 | { | |
1586 | cpu->offset = le64_to_cpu(disk->offset); | |
5f39d397 | 1587 | cpu->type = disk->type; |
e2fa7227 CM |
1588 | cpu->objectid = le64_to_cpu(disk->objectid); |
1589 | } | |
1590 | ||
1591 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
1592 | struct btrfs_key *cpu) | |
1593 | { | |
1594 | disk->offset = cpu_to_le64(cpu->offset); | |
5f39d397 | 1595 | disk->type = cpu->type; |
e2fa7227 CM |
1596 | disk->objectid = cpu_to_le64(cpu->objectid); |
1597 | } | |
1598 | ||
5f39d397 CM |
1599 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
1600 | struct btrfs_key *key, int nr) | |
7f5c1516 | 1601 | { |
5f39d397 CM |
1602 | struct btrfs_disk_key disk_key; |
1603 | btrfs_node_key(eb, &disk_key, nr); | |
1604 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
1605 | } |
1606 | ||
5f39d397 CM |
1607 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
1608 | struct btrfs_key *key, int nr) | |
7f5c1516 | 1609 | { |
5f39d397 CM |
1610 | struct btrfs_disk_key disk_key; |
1611 | btrfs_item_key(eb, &disk_key, nr); | |
1612 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
1613 | } |
1614 | ||
5f39d397 CM |
1615 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
1616 | struct btrfs_dir_item *item, | |
1617 | struct btrfs_key *key) | |
4d775673 | 1618 | { |
5f39d397 CM |
1619 | struct btrfs_disk_key disk_key; |
1620 | btrfs_dir_item_key(eb, item, &disk_key); | |
1621 | btrfs_disk_key_to_cpu(key, &disk_key); | |
4d775673 CM |
1622 | } |
1623 | ||
58176a96 | 1624 | |
5f39d397 | 1625 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
3768f368 | 1626 | { |
5f39d397 | 1627 | return key->type; |
3768f368 CM |
1628 | } |
1629 | ||
5f39d397 | 1630 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
3768f368 | 1631 | { |
5f39d397 | 1632 | key->type = val; |
3768f368 CM |
1633 | } |
1634 | ||
5f39d397 | 1635 | /* struct btrfs_header */ |
db94535d | 1636 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
5f39d397 CM |
1637 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
1638 | generation, 64); | |
1639 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | |
1640 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | |
63b10fc4 | 1641 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
5f39d397 | 1642 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
0f7d52f4 | 1643 | |
63b10fc4 CM |
1644 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) |
1645 | { | |
1646 | return (btrfs_header_flags(eb) & flag) == flag; | |
1647 | } | |
1648 | ||
1649 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) | |
1650 | { | |
1651 | u64 flags = btrfs_header_flags(eb); | |
1652 | btrfs_set_header_flags(eb, flags | flag); | |
1653 | return (flags & flag) == flag; | |
1654 | } | |
1655 | ||
1656 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) | |
1657 | { | |
1658 | u64 flags = btrfs_header_flags(eb); | |
1659 | btrfs_set_header_flags(eb, flags & ~flag); | |
1660 | return (flags & flag) == flag; | |
1661 | } | |
1662 | ||
5d4f98a2 YZ |
1663 | static inline int btrfs_header_backref_rev(struct extent_buffer *eb) |
1664 | { | |
1665 | u64 flags = btrfs_header_flags(eb); | |
1666 | return flags >> BTRFS_BACKREF_REV_SHIFT; | |
1667 | } | |
1668 | ||
1669 | static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, | |
1670 | int rev) | |
1671 | { | |
1672 | u64 flags = btrfs_header_flags(eb); | |
1673 | flags &= ~BTRFS_BACKREF_REV_MASK; | |
1674 | flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; | |
1675 | btrfs_set_header_flags(eb, flags); | |
1676 | } | |
1677 | ||
5f39d397 | 1678 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
0f7d52f4 | 1679 | { |
5f39d397 CM |
1680 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
1681 | return (u8 *)ptr; | |
0f7d52f4 CM |
1682 | } |
1683 | ||
e17cade2 CM |
1684 | static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) |
1685 | { | |
1686 | unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid); | |
1687 | return (u8 *)ptr; | |
1688 | } | |
1689 | ||
5f39d397 | 1690 | static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) |
3768f368 | 1691 | { |
5f39d397 CM |
1692 | unsigned long ptr = offsetof(struct btrfs_super_block, fsid); |
1693 | return (u8 *)ptr; | |
3768f368 CM |
1694 | } |
1695 | ||
5f39d397 | 1696 | static inline u8 *btrfs_header_csum(struct extent_buffer *eb) |
3768f368 | 1697 | { |
5f39d397 CM |
1698 | unsigned long ptr = offsetof(struct btrfs_header, csum); |
1699 | return (u8 *)ptr; | |
3768f368 CM |
1700 | } |
1701 | ||
5f39d397 | 1702 | static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) |
3768f368 | 1703 | { |
5f39d397 | 1704 | return NULL; |
3768f368 CM |
1705 | } |
1706 | ||
5f39d397 | 1707 | static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) |
3768f368 | 1708 | { |
5f39d397 | 1709 | return NULL; |
3768f368 CM |
1710 | } |
1711 | ||
5f39d397 | 1712 | static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) |
3768f368 | 1713 | { |
5f39d397 | 1714 | return NULL; |
3768f368 CM |
1715 | } |
1716 | ||
5f39d397 | 1717 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
3768f368 | 1718 | { |
d397712b | 1719 | return btrfs_header_level(eb) == 0; |
3768f368 CM |
1720 | } |
1721 | ||
5f39d397 | 1722 | /* struct btrfs_root_item */ |
84234f3a YZ |
1723 | BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, |
1724 | generation, 64); | |
5f39d397 | 1725 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); |
db94535d CM |
1726 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
1727 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); | |
3768f368 | 1728 | |
84234f3a YZ |
1729 | BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, |
1730 | generation, 64); | |
db94535d CM |
1731 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
1732 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); | |
5f39d397 CM |
1733 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
1734 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | |
f2b636e8 | 1735 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); |
db94535d CM |
1736 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
1737 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); | |
80ff3856 YZ |
1738 | BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, |
1739 | last_snapshot, 64); | |
123abc88 | 1740 | |
5f39d397 | 1741 | /* struct btrfs_super_block */ |
607d432d | 1742 | |
db94535d | 1743 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
a061fc8d | 1744 | BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); |
5f39d397 CM |
1745 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
1746 | generation, 64); | |
1747 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | |
0b86a832 CM |
1748 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
1749 | struct btrfs_super_block, sys_chunk_array_size, 32); | |
84234f3a YZ |
1750 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, |
1751 | struct btrfs_super_block, chunk_root_generation, 64); | |
db94535d CM |
1752 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
1753 | root_level, 8); | |
0b86a832 CM |
1754 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
1755 | chunk_root, 64); | |
1756 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, | |
e02119d5 CM |
1757 | chunk_root_level, 8); |
1758 | BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, | |
1759 | log_root, 64); | |
c3027eb5 CM |
1760 | BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, |
1761 | log_root_transid, 64); | |
e02119d5 CM |
1762 | BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, |
1763 | log_root_level, 8); | |
db94535d CM |
1764 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
1765 | total_bytes, 64); | |
1766 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, | |
1767 | bytes_used, 64); | |
5f39d397 CM |
1768 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
1769 | sectorsize, 32); | |
1770 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | |
1771 | nodesize, 32); | |
1772 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, | |
1773 | leafsize, 32); | |
87ee04eb CM |
1774 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
1775 | stripesize, 32); | |
5f39d397 CM |
1776 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
1777 | root_dir_objectid, 64); | |
8a4b83cc CM |
1778 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
1779 | num_devices, 64); | |
f2b636e8 JB |
1780 | BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, |
1781 | compat_flags, 64); | |
1782 | BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, | |
1783 | compat_flags, 64); | |
1784 | BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, | |
1785 | incompat_flags, 64); | |
607d432d JB |
1786 | BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, |
1787 | csum_type, 16); | |
1788 | ||
1789 | static inline int btrfs_super_csum_size(struct btrfs_super_block *s) | |
1790 | { | |
1791 | int t = btrfs_super_csum_type(s); | |
1792 | BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes)); | |
1793 | return btrfs_csum_sizes[t]; | |
1794 | } | |
2e635a27 | 1795 | |
5f39d397 | 1796 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
2e635a27 | 1797 | { |
5f39d397 | 1798 | return offsetof(struct btrfs_leaf, items); |
2e635a27 CM |
1799 | } |
1800 | ||
5f39d397 CM |
1801 | /* struct btrfs_file_extent_item */ |
1802 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | |
9f5fae2f | 1803 | |
d397712b CM |
1804 | static inline unsigned long |
1805 | btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) | |
236454df | 1806 | { |
5f39d397 | 1807 | unsigned long offset = (unsigned long)e; |
db94535d | 1808 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 1809 | return offset; |
236454df CM |
1810 | } |
1811 | ||
1812 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
1813 | { | |
db94535d | 1814 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
9f5fae2f CM |
1815 | } |
1816 | ||
db94535d CM |
1817 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
1818 | disk_bytenr, 64); | |
5f39d397 CM |
1819 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
1820 | generation, 64); | |
db94535d CM |
1821 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
1822 | disk_num_bytes, 64); | |
5f39d397 CM |
1823 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
1824 | offset, 64); | |
db94535d CM |
1825 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
1826 | num_bytes, 64); | |
c8b97818 CM |
1827 | BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, |
1828 | ram_bytes, 64); | |
1829 | BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, | |
1830 | compression, 8); | |
1831 | BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, | |
1832 | encryption, 8); | |
1833 | BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, | |
1834 | other_encoding, 16); | |
1835 | ||
1836 | /* this returns the number of file bytes represented by the inline item. | |
1837 | * If an item is compressed, this is the uncompressed size | |
1838 | */ | |
1839 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, | |
1840 | struct btrfs_file_extent_item *e) | |
1841 | { | |
1842 | return btrfs_file_extent_ram_bytes(eb, e); | |
1843 | } | |
1844 | ||
1845 | /* | |
1846 | * this returns the number of bytes used by the item on disk, minus the | |
1847 | * size of any extent headers. If a file is compressed on disk, this is | |
1848 | * the compressed size | |
1849 | */ | |
1850 | static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, | |
1851 | struct btrfs_item *e) | |
1852 | { | |
1853 | unsigned long offset; | |
1854 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); | |
1855 | return btrfs_item_size(eb, e) - offset; | |
1856 | } | |
9f5fae2f | 1857 | |
e20d96d6 CM |
1858 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
1859 | { | |
1860 | return sb->s_fs_info; | |
1861 | } | |
1862 | ||
58176a96 JB |
1863 | static inline int btrfs_set_root_name(struct btrfs_root *root, |
1864 | const char *name, int len) | |
1865 | { | |
1866 | /* if we already have a name just free it */ | |
d397712b | 1867 | kfree(root->name); |
58176a96 JB |
1868 | |
1869 | root->name = kmalloc(len+1, GFP_KERNEL); | |
1870 | if (!root->name) | |
1871 | return -ENOMEM; | |
1872 | ||
1873 | memcpy(root->name, name, len); | |
d397712b | 1874 | root->name[len] = '\0'; |
58176a96 JB |
1875 | |
1876 | return 0; | |
1877 | } | |
1878 | ||
d397712b CM |
1879 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) |
1880 | { | |
db94535d CM |
1881 | if (level == 0) |
1882 | return root->leafsize; | |
1883 | return root->nodesize; | |
1884 | } | |
1885 | ||
4beb1b8b CM |
1886 | /* helper function to cast into the data area of the leaf. */ |
1887 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 | 1888 | ((type *)(btrfs_leaf_data(leaf) + \ |
5f39d397 CM |
1889 | btrfs_item_offset_nr(leaf, slot))) |
1890 | ||
1891 | #define btrfs_item_ptr_offset(leaf, slot) \ | |
1892 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | |
1893 | btrfs_item_offset_nr(leaf, slot))) | |
4beb1b8b | 1894 | |
2b1f55b0 CM |
1895 | static inline struct dentry *fdentry(struct file *file) |
1896 | { | |
6da6abae | 1897 | return file->f_path.dentry; |
6da6abae CM |
1898 | } |
1899 | ||
b18c6685 | 1900 | /* extent-tree.c */ |
fa9c0d79 | 1901 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
56bec294 CM |
1902 | int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, |
1903 | struct btrfs_root *root, unsigned long count); | |
31840ae1 | 1904 | int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len); |
e02119d5 CM |
1905 | int btrfs_update_pinned_extents(struct btrfs_root *root, |
1906 | u64 bytenr, u64 num, int pin); | |
1907 | int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans, | |
1908 | struct btrfs_root *root, struct extent_buffer *leaf); | |
80ff3856 | 1909 | int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, |
5d4f98a2 YZ |
1910 | struct btrfs_root *root, |
1911 | u64 objectid, u64 offset, u64 bytenr); | |
d1310b2e | 1912 | int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy); |
d397712b CM |
1913 | struct btrfs_block_group_cache *btrfs_lookup_block_group( |
1914 | struct btrfs_fs_info *info, | |
1915 | u64 bytenr); | |
5d4f98a2 | 1916 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
d2fb3437 YZ |
1917 | u64 btrfs_find_block_group(struct btrfs_root *root, |
1918 | u64 search_start, u64 search_hint, int owner); | |
5f39d397 | 1919 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
5d4f98a2 YZ |
1920 | struct btrfs_root *root, u32 blocksize, |
1921 | u64 parent, u64 root_objectid, | |
1922 | struct btrfs_disk_key *key, int level, | |
1923 | u64 hint, u64 empty_size); | |
65b51a00 CM |
1924 | struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans, |
1925 | struct btrfs_root *root, | |
4008c04a CM |
1926 | u64 bytenr, u32 blocksize, |
1927 | int level); | |
5d4f98a2 YZ |
1928 | int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, |
1929 | struct btrfs_root *root, | |
1930 | u64 root_objectid, u64 owner, | |
1931 | u64 offset, struct btrfs_key *ins); | |
1932 | int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, | |
1933 | struct btrfs_root *root, | |
1934 | u64 root_objectid, u64 owner, u64 offset, | |
1935 | struct btrfs_key *ins); | |
e6dcd2dc CM |
1936 | int btrfs_reserve_extent(struct btrfs_trans_handle *trans, |
1937 | struct btrfs_root *root, | |
1938 | u64 num_bytes, u64 min_alloc_size, | |
1939 | u64 empty_size, u64 hint_byte, | |
1940 | u64 search_end, struct btrfs_key *ins, | |
1941 | u64 data); | |
e089f05c | 1942 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
5d4f98a2 YZ |
1943 | struct extent_buffer *buf, int full_backref); |
1944 | int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, | |
1945 | struct extent_buffer *buf, int full_backref); | |
1946 | int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, | |
1947 | struct btrfs_root *root, | |
1948 | u64 bytenr, u64 num_bytes, u64 flags, | |
1949 | int is_data); | |
31840ae1 ZY |
1950 | int btrfs_free_extent(struct btrfs_trans_handle *trans, |
1951 | struct btrfs_root *root, | |
1952 | u64 bytenr, u64 num_bytes, u64 parent, | |
5d4f98a2 YZ |
1953 | u64 root_objectid, u64 owner, u64 offset); |
1954 | ||
65b51a00 | 1955 | int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len); |
ccd467d6 CM |
1956 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
1957 | struct btrfs_root *root, | |
d1310b2e | 1958 | struct extent_io_tree *unpin); |
b18c6685 | 1959 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
31840ae1 ZY |
1960 | struct btrfs_root *root, |
1961 | u64 bytenr, u64 num_bytes, u64 parent, | |
5d4f98a2 YZ |
1962 | u64 root_objectid, u64 owner, u64 offset); |
1963 | ||
9078a3e1 CM |
1964 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
1965 | struct btrfs_root *root); | |
d2fb3437 | 1966 | int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr); |
9078a3e1 CM |
1967 | int btrfs_free_block_groups(struct btrfs_fs_info *info); |
1968 | int btrfs_read_block_groups(struct btrfs_root *root); | |
0b86a832 CM |
1969 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
1970 | struct btrfs_root *root, u64 bytes_used, | |
e17cade2 | 1971 | u64 type, u64 chunk_objectid, u64 chunk_offset, |
0b86a832 | 1972 | u64 size); |
1a40e23b ZY |
1973 | int btrfs_remove_block_group(struct btrfs_trans_handle *trans, |
1974 | struct btrfs_root *root, u64 group_start); | |
5d4f98a2 YZ |
1975 | int btrfs_prepare_block_group_relocation(struct btrfs_root *root, |
1976 | struct btrfs_block_group_cache *group); | |
1977 | ||
2b82032c | 1978 | u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags); |
6a63209f | 1979 | void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde); |
4184ea7f CM |
1980 | void btrfs_clear_space_info_full(struct btrfs_fs_info *info); |
1981 | ||
6a63209f JB |
1982 | int btrfs_check_metadata_free_space(struct btrfs_root *root); |
1983 | int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode, | |
1984 | u64 bytes); | |
1985 | void btrfs_free_reserved_data_space(struct btrfs_root *root, | |
1986 | struct inode *inode, u64 bytes); | |
1987 | void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode, | |
1988 | u64 bytes); | |
1989 | void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode, | |
1990 | u64 bytes); | |
dee26a9f | 1991 | /* ctree.c */ |
5d4f98a2 YZ |
1992 | int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, |
1993 | int level, int *slot); | |
1994 | int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); | |
0b86a832 CM |
1995 | int btrfs_previous_item(struct btrfs_root *root, |
1996 | struct btrfs_path *path, u64 min_objectid, | |
1997 | int type); | |
31840ae1 ZY |
1998 | int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, |
1999 | struct btrfs_root *root, struct btrfs_path *path, | |
2000 | struct btrfs_key *new_key); | |
925baedd CM |
2001 | struct extent_buffer *btrfs_root_node(struct btrfs_root *root); |
2002 | struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); | |
e7a84565 | 2003 | int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, |
3f157a2f CM |
2004 | struct btrfs_key *key, int lowest_level, |
2005 | int cache_only, u64 min_trans); | |
2006 | int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, | |
e02119d5 | 2007 | struct btrfs_key *max_key, |
3f157a2f CM |
2008 | struct btrfs_path *path, int cache_only, |
2009 | u64 min_trans); | |
5f39d397 CM |
2010 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
2011 | struct btrfs_root *root, struct extent_buffer *buf, | |
2012 | struct extent_buffer *parent, int parent_slot, | |
9fa8cfe7 | 2013 | struct extent_buffer **cow_ret); |
be20aa9d CM |
2014 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
2015 | struct btrfs_root *root, | |
2016 | struct extent_buffer *buf, | |
2017 | struct extent_buffer **cow_ret, u64 new_root_objectid); | |
5d4f98a2 YZ |
2018 | int btrfs_block_can_be_shared(struct btrfs_root *root, |
2019 | struct extent_buffer *buf); | |
6567e837 CM |
2020 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
2021 | *root, struct btrfs_path *path, u32 data_size); | |
b18c6685 CM |
2022 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
2023 | struct btrfs_root *root, | |
2024 | struct btrfs_path *path, | |
179e29e4 | 2025 | u32 new_size, int from_end); |
459931ec CM |
2026 | int btrfs_split_item(struct btrfs_trans_handle *trans, |
2027 | struct btrfs_root *root, | |
2028 | struct btrfs_path *path, | |
2029 | struct btrfs_key *new_key, | |
2030 | unsigned long split_offset); | |
e089f05c CM |
2031 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
2032 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
2033 | ins_len, int cow); | |
6702ed49 | 2034 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
5f39d397 | 2035 | struct btrfs_root *root, struct extent_buffer *parent, |
a6b6e75e CM |
2036 | int start_slot, int cache_only, u64 *last_ret, |
2037 | struct btrfs_key *progress); | |
234b63a0 | 2038 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
2c90e5d6 CM |
2039 | struct btrfs_path *btrfs_alloc_path(void); |
2040 | void btrfs_free_path(struct btrfs_path *p); | |
b4ce94de | 2041 | void btrfs_set_path_blocking(struct btrfs_path *p); |
b4ce94de CM |
2042 | void btrfs_unlock_up_safe(struct btrfs_path *p, int level); |
2043 | ||
85e21bac CM |
2044 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
2045 | struct btrfs_path *path, int slot, int nr); | |
85e21bac CM |
2046 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, |
2047 | struct btrfs_root *root, | |
2048 | struct btrfs_path *path) | |
2049 | { | |
2050 | return btrfs_del_items(trans, root, path, path->slots[0], 1); | |
2051 | } | |
2052 | ||
e089f05c CM |
2053 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
2054 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
f3465ca4 JB |
2055 | int btrfs_insert_some_items(struct btrfs_trans_handle *trans, |
2056 | struct btrfs_root *root, | |
2057 | struct btrfs_path *path, | |
2058 | struct btrfs_key *cpu_key, u32 *data_size, | |
2059 | int nr); | |
9c58309d CM |
2060 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
2061 | struct btrfs_root *root, | |
2062 | struct btrfs_path *path, | |
2063 | struct btrfs_key *cpu_key, u32 *data_size, int nr); | |
2064 | ||
2065 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, | |
2066 | struct btrfs_root *root, | |
2067 | struct btrfs_path *path, | |
2068 | struct btrfs_key *key, | |
2069 | u32 data_size) | |
2070 | { | |
2071 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); | |
2072 | } | |
2073 | ||
234b63a0 | 2074 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
7bb86316 | 2075 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
5f39d397 | 2076 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
e089f05c | 2077 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
9f3a7427 | 2078 | *root); |
f82d02d9 YZ |
2079 | int btrfs_drop_subtree(struct btrfs_trans_handle *trans, |
2080 | struct btrfs_root *root, | |
2081 | struct extent_buffer *node, | |
2082 | struct extent_buffer *parent); | |
dee26a9f | 2083 | /* root-item.c */ |
ea9e8b11 CM |
2084 | int btrfs_find_root_ref(struct btrfs_root *tree_root, |
2085 | struct btrfs_path *path, | |
2086 | u64 root_id, u64 ref_id); | |
0660b5af CM |
2087 | int btrfs_add_root_ref(struct btrfs_trans_handle *trans, |
2088 | struct btrfs_root *tree_root, | |
2089 | u64 root_id, u8 type, u64 ref_id, | |
2090 | u64 dirid, u64 sequence, | |
2091 | const char *name, int name_len); | |
e089f05c CM |
2092 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
2093 | struct btrfs_key *key); | |
2094 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
2095 | *root, struct btrfs_key *key, struct btrfs_root_item | |
2096 | *item); | |
2097 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
2098 | *root, struct btrfs_key *key, struct btrfs_root_item | |
2099 | *item); | |
2100 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct | |
2101 | btrfs_root_item *item, struct btrfs_key *key); | |
bf4ef679 CM |
2102 | int btrfs_search_root(struct btrfs_root *root, u64 search_start, |
2103 | u64 *found_objectid); | |
5d4f98a2 YZ |
2104 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid); |
2105 | int btrfs_set_root_node(struct btrfs_root_item *item, | |
2106 | struct extent_buffer *node); | |
dee26a9f | 2107 | /* dir-item.c */ |
d397712b CM |
2108 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, |
2109 | struct btrfs_root *root, const char *name, | |
2110 | int name_len, u64 dir, | |
aec7477b | 2111 | struct btrfs_key *location, u8 type, u64 index); |
7e38180e CM |
2112 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
2113 | struct btrfs_root *root, | |
2114 | struct btrfs_path *path, u64 dir, | |
2115 | const char *name, int name_len, | |
2116 | int mod); | |
2117 | struct btrfs_dir_item * | |
2118 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | |
2119 | struct btrfs_root *root, | |
2120 | struct btrfs_path *path, u64 dir, | |
2121 | u64 objectid, const char *name, int name_len, | |
2122 | int mod); | |
2123 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, | |
2124 | struct btrfs_path *path, | |
7f5c1516 | 2125 | const char *name, int name_len); |
7e38180e CM |
2126 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
2127 | struct btrfs_root *root, | |
2128 | struct btrfs_path *path, | |
2129 | struct btrfs_dir_item *di); | |
5103e947 JB |
2130 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
2131 | struct btrfs_root *root, const char *name, | |
2132 | u16 name_len, const void *data, u16 data_len, | |
2133 | u64 dir); | |
2134 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, | |
2135 | struct btrfs_root *root, | |
2136 | struct btrfs_path *path, u64 dir, | |
2137 | const char *name, u16 name_len, | |
2138 | int mod); | |
7b128766 JB |
2139 | |
2140 | /* orphan.c */ | |
2141 | int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, | |
2142 | struct btrfs_root *root, u64 offset); | |
2143 | int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, | |
2144 | struct btrfs_root *root, u64 offset); | |
2145 | ||
dee26a9f | 2146 | /* inode-map.c */ |
9f5fae2f CM |
2147 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
2148 | struct btrfs_root *fs_root, | |
2149 | u64 dirid, u64 *objectid); | |
5be6f7f1 CM |
2150 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
2151 | ||
dee26a9f | 2152 | /* inode-item.c */ |
3954401f CM |
2153 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
2154 | struct btrfs_root *root, | |
2155 | const char *name, int name_len, | |
aec7477b | 2156 | u64 inode_objectid, u64 ref_objectid, u64 index); |
3954401f CM |
2157 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, |
2158 | struct btrfs_root *root, | |
2159 | const char *name, int name_len, | |
aec7477b | 2160 | u64 inode_objectid, u64 ref_objectid, u64 *index); |
5f39d397 CM |
2161 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
2162 | struct btrfs_root *root, | |
2163 | struct btrfs_path *path, u64 objectid); | |
293ffd5f | 2164 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
2165 | *root, struct btrfs_path *path, |
2166 | struct btrfs_key *location, int mod); | |
dee26a9f CM |
2167 | |
2168 | /* file-item.c */ | |
459931ec CM |
2169 | int btrfs_del_csums(struct btrfs_trans_handle *trans, |
2170 | struct btrfs_root *root, u64 bytenr, u64 len); | |
61b49440 | 2171 | int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, |
d20f7043 | 2172 | struct bio *bio, u32 *dst); |
b18c6685 | 2173 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
c8b97818 CM |
2174 | struct btrfs_root *root, |
2175 | u64 objectid, u64 pos, | |
2176 | u64 disk_offset, u64 disk_num_bytes, | |
2177 | u64 num_bytes, u64 offset, u64 ram_bytes, | |
2178 | u8 compression, u8 encryption, u16 other_encoding); | |
dee26a9f CM |
2179 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
2180 | struct btrfs_root *root, | |
2181 | struct btrfs_path *path, u64 objectid, | |
db94535d | 2182 | u64 bytenr, int mod); |
065631f6 | 2183 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
d20f7043 | 2184 | struct btrfs_root *root, |
e6dcd2dc | 2185 | struct btrfs_ordered_sum *sums); |
3edf7d33 | 2186 | int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, |
d20f7043 | 2187 | struct bio *bio, u64 file_start, int contig); |
c8b97818 CM |
2188 | int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode, |
2189 | u64 start, unsigned long len); | |
b18c6685 CM |
2190 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
2191 | struct btrfs_root *root, | |
2192 | struct btrfs_path *path, | |
d20f7043 | 2193 | u64 bytenr, int cow); |
1de037a4 CM |
2194 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
2195 | struct btrfs_root *root, struct btrfs_path *path, | |
2196 | u64 isize); | |
17d217fe YZ |
2197 | int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, |
2198 | u64 end, struct list_head *list); | |
39279cc3 | 2199 | /* inode.c */ |
4881ee5a CM |
2200 | |
2201 | /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ | |
5036f538 | 2202 | #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) |
4881ee5a CM |
2203 | #define ClearPageChecked ClearPageFsMisc |
2204 | #define SetPageChecked SetPageFsMisc | |
2205 | #define PageChecked PageFsMisc | |
2206 | #endif | |
2207 | ||
3de4586c CM |
2208 | struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); |
2209 | int btrfs_set_inode_index(struct inode *dir, u64 *index); | |
e02119d5 CM |
2210 | int btrfs_unlink_inode(struct btrfs_trans_handle *trans, |
2211 | struct btrfs_root *root, | |
2212 | struct inode *dir, struct inode *inode, | |
2213 | const char *name, int name_len); | |
2214 | int btrfs_add_link(struct btrfs_trans_handle *trans, | |
2215 | struct inode *parent_inode, struct inode *inode, | |
2216 | const char *name, int name_len, int add_backref, u64 index); | |
2217 | int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, | |
2218 | struct btrfs_root *root, | |
2219 | struct inode *inode, u64 new_size, | |
2220 | u32 min_type); | |
2221 | ||
ea8c2819 CM |
2222 | int btrfs_start_delalloc_inodes(struct btrfs_root *root); |
2223 | int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end); | |
f421950f CM |
2224 | int btrfs_writepages(struct address_space *mapping, |
2225 | struct writeback_control *wbc); | |
d2fb3437 YZ |
2226 | int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, |
2227 | struct btrfs_root *new_root, struct dentry *dentry, | |
2228 | u64 new_dirid, u64 alloc_hint); | |
239b14b3 | 2229 | int btrfs_merge_bio_hook(struct page *page, unsigned long offset, |
c8b97818 | 2230 | size_t size, struct bio *bio, unsigned long bio_flags); |
239b14b3 | 2231 | |
edbd8d4e CM |
2232 | unsigned long btrfs_force_ra(struct address_space *mapping, |
2233 | struct file_ra_state *ra, struct file *file, | |
2234 | pgoff_t offset, pgoff_t last_index); | |
c2ec175c | 2235 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); |
9ebefb18 | 2236 | int btrfs_readpage(struct file *file, struct page *page); |
39279cc3 | 2237 | void btrfs_delete_inode(struct inode *inode); |
2da98f00 | 2238 | void btrfs_put_inode(struct inode *inode); |
39279cc3 CM |
2239 | int btrfs_write_inode(struct inode *inode, int wait); |
2240 | void btrfs_dirty_inode(struct inode *inode); | |
2241 | struct inode *btrfs_alloc_inode(struct super_block *sb); | |
2242 | void btrfs_destroy_inode(struct inode *inode); | |
2243 | int btrfs_init_cachep(void); | |
2244 | void btrfs_destroy_cachep(void); | |
6bf13c0c | 2245 | long btrfs_ioctl_trans_end(struct file *file); |
1a54ef8c | 2246 | struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, |
5d4f98a2 | 2247 | struct btrfs_root *root); |
39279cc3 CM |
2248 | int btrfs_commit_write(struct file *file, struct page *page, |
2249 | unsigned from, unsigned to); | |
a52d9a80 CM |
2250 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
2251 | size_t page_offset, u64 start, u64 end, | |
2252 | int create); | |
2253 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
2254 | struct btrfs_root *root, | |
2255 | struct inode *inode); | |
5b21f2ed ZY |
2256 | int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode); |
2257 | int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode); | |
2258 | void btrfs_orphan_cleanup(struct btrfs_root *root); | |
9036c102 | 2259 | int btrfs_cont_expand(struct inode *inode, loff_t size); |
f46b5a66 CH |
2260 | |
2261 | /* ioctl.c */ | |
2262 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); | |
6cbff00f CH |
2263 | void btrfs_update_iflags(struct inode *inode); |
2264 | void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); | |
f46b5a66 | 2265 | |
39279cc3 | 2266 | /* file.c */ |
e02119d5 | 2267 | int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync); |
5b21f2ed ZY |
2268 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, |
2269 | int skip_pinned); | |
5f56406a | 2270 | int btrfs_check_file(struct btrfs_root *root, struct inode *inode); |
39279cc3 CM |
2271 | extern struct file_operations btrfs_file_operations; |
2272 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, | |
2273 | struct btrfs_root *root, struct inode *inode, | |
e980b50c CM |
2274 | u64 start, u64 end, u64 locked_end, |
2275 | u64 inline_limit, u64 *hint_block); | |
d899e052 YZ |
2276 | int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, |
2277 | struct btrfs_root *root, | |
2278 | struct inode *inode, u64 start, u64 end); | |
6bf13c0c SW |
2279 | int btrfs_release_file(struct inode *inode, struct file *file); |
2280 | ||
6702ed49 CM |
2281 | /* tree-defrag.c */ |
2282 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | |
2283 | struct btrfs_root *root, int cache_only); | |
58176a96 JB |
2284 | |
2285 | /* sysfs.c */ | |
2286 | int btrfs_init_sysfs(void); | |
2287 | void btrfs_exit_sysfs(void); | |
2288 | int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); | |
2289 | int btrfs_sysfs_add_root(struct btrfs_root *root); | |
2290 | void btrfs_sysfs_del_root(struct btrfs_root *root); | |
2291 | void btrfs_sysfs_del_super(struct btrfs_fs_info *root); | |
2292 | ||
5103e947 JB |
2293 | /* xattr.c */ |
2294 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
6099afe8 | 2295 | |
edbd8d4e CM |
2296 | /* super.c */ |
2297 | u64 btrfs_parse_size(char *str); | |
edf24abe | 2298 | int btrfs_parse_options(struct btrfs_root *root, char *options); |
6bf13c0c | 2299 | int btrfs_sync_fs(struct super_block *sb, int wait); |
33268eaf JB |
2300 | |
2301 | /* acl.c */ | |
7df336ec | 2302 | #ifdef CONFIG_FS_POSIX_ACL |
33268eaf | 2303 | int btrfs_check_acl(struct inode *inode, int mask); |
7df336ec AV |
2304 | #else |
2305 | #define btrfs_check_acl NULL | |
2306 | #endif | |
33268eaf JB |
2307 | int btrfs_init_acl(struct inode *inode, struct inode *dir); |
2308 | int btrfs_acl_chmod(struct inode *inode); | |
0f9dd46c | 2309 | |
5d4f98a2 YZ |
2310 | /* relocation.c */ |
2311 | int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start); | |
2312 | int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, | |
2313 | struct btrfs_root *root); | |
2314 | int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, | |
2315 | struct btrfs_root *root); | |
2316 | int btrfs_recover_relocation(struct btrfs_root *root); | |
2317 | int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); | |
eb60ceac | 2318 | #endif |