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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 | |
810191ff CM |
22 | #include <linux/mm.h> |
23 | #include <linux/highmem.h> | |
e20d96d6 | 24 | #include <linux/fs.h> |
a2de733c | 25 | #include <linux/rwsem.h> |
58176a96 | 26 | #include <linux/completion.h> |
04160088 | 27 | #include <linux/backing-dev.h> |
e6dcd2dc | 28 | #include <linux/wait.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
f8b18087 | 30 | #include <linux/kobject.h> |
1abe9b8a | 31 | #include <trace/events/btrfs.h> |
479965d6 | 32 | #include <asm/kmap_types.h> |
3b16a4e3 | 33 | #include <linux/pagemap.h> |
d1310b2e | 34 | #include "extent_io.h" |
5f39d397 | 35 | #include "extent_map.h" |
8b712842 | 36 | #include "async-thread.h" |
a2de733c | 37 | #include "ioctl.h" |
e20d96d6 | 38 | |
e089f05c | 39 | struct btrfs_trans_handle; |
79154b1b | 40 | struct btrfs_transaction; |
a22285a6 | 41 | struct btrfs_pending_snapshot; |
35b7e476 CM |
42 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
43 | extern struct kmem_cache *btrfs_transaction_cachep; | |
44 | extern struct kmem_cache *btrfs_bit_radix_cachep; | |
2c90e5d6 | 45 | extern struct kmem_cache *btrfs_path_cachep; |
dc89e982 | 46 | extern struct kmem_cache *btrfs_free_space_cachep; |
e6dcd2dc | 47 | struct btrfs_ordered_sum; |
e089f05c | 48 | |
2a7108ad | 49 | #define BTRFS_MAGIC "_BHRfS_M" |
eb60ceac | 50 | |
4008c04a | 51 | #define BTRFS_MAX_LEVEL 8 |
0b86a832 | 52 | |
5d4f98a2 YZ |
53 | #define BTRFS_COMPAT_EXTENT_TREE_V0 |
54 | ||
5a3f23d5 CM |
55 | /* |
56 | * files bigger than this get some pre-flushing when they are added | |
57 | * to the ordered operations list. That way we limit the total | |
58 | * work done by the commit | |
59 | */ | |
60 | #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024) | |
61 | ||
0b86a832 | 62 | /* holds pointers to all of the tree roots */ |
6407bf6d | 63 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
0b86a832 CM |
64 | |
65 | /* stores information about which extents are in use, and reference counts */ | |
0cf6c620 | 66 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
0b86a832 | 67 | |
0b86a832 CM |
68 | /* |
69 | * chunk tree stores translations from logical -> physical block numbering | |
70 | * the super block points to the chunk tree | |
71 | */ | |
e085def2 | 72 | #define BTRFS_CHUNK_TREE_OBJECTID 3ULL |
0b86a832 CM |
73 | |
74 | /* | |
75 | * stores information about which areas of a given device are in use. | |
76 | * one per device. The tree of tree roots points to the device tree | |
77 | */ | |
e085def2 CM |
78 | #define BTRFS_DEV_TREE_OBJECTID 4ULL |
79 | ||
80 | /* one per subvolume, storing files and directories */ | |
81 | #define BTRFS_FS_TREE_OBJECTID 5ULL | |
82 | ||
83 | /* directory objectid inside the root tree */ | |
84 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL | |
0b86a832 | 85 | |
d20f7043 CM |
86 | /* holds checksums of all the data extents */ |
87 | #define BTRFS_CSUM_TREE_OBJECTID 7ULL | |
88 | ||
0940ebf6 ID |
89 | /* for storing balance parameters in the root tree */ |
90 | #define BTRFS_BALANCE_OBJECTID -4ULL | |
91 | ||
7b128766 JB |
92 | /* orhpan objectid for tracking unlinked/truncated files */ |
93 | #define BTRFS_ORPHAN_OBJECTID -5ULL | |
94 | ||
e02119d5 CM |
95 | /* does write ahead logging to speed up fsyncs */ |
96 | #define BTRFS_TREE_LOG_OBJECTID -6ULL | |
97 | #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL | |
98 | ||
e4657689 ZY |
99 | /* for space balancing */ |
100 | #define BTRFS_TREE_RELOC_OBJECTID -8ULL | |
101 | #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL | |
102 | ||
d20f7043 CM |
103 | /* |
104 | * extent checksums all have this objectid | |
105 | * this allows them to share the logging tree | |
106 | * for fsyncs | |
107 | */ | |
108 | #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL | |
109 | ||
0af3d00b JB |
110 | /* For storing free space cache */ |
111 | #define BTRFS_FREE_SPACE_OBJECTID -11ULL | |
112 | ||
82d5902d LZ |
113 | /* |
114 | * The inode number assigned to the special inode for sotring | |
115 | * free ino cache | |
116 | */ | |
117 | #define BTRFS_FREE_INO_OBJECTID -12ULL | |
118 | ||
31840ae1 ZY |
119 | /* dummy objectid represents multiple objectids */ |
120 | #define BTRFS_MULTIPLE_OBJECTIDS -255ULL | |
121 | ||
0b86a832 | 122 | /* |
6527cdbe | 123 | * All files have objectids in this range. |
0b86a832 | 124 | */ |
f6dbff55 | 125 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
6527cdbe | 126 | #define BTRFS_LAST_FREE_OBJECTID -256ULL |
e17cade2 | 127 | #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL |
3768f368 | 128 | |
0b86a832 CM |
129 | |
130 | /* | |
131 | * the device items go into the chunk tree. The key is in the form | |
132 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] | |
133 | */ | |
134 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL | |
135 | ||
4df27c4d YZ |
136 | #define BTRFS_BTREE_INODE_OBJECTID 1 |
137 | ||
138 | #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2 | |
139 | ||
e20d96d6 CM |
140 | /* |
141 | * we can actually store much bigger names, but lets not confuse the rest | |
142 | * of linux | |
143 | */ | |
144 | #define BTRFS_NAME_LEN 255 | |
145 | ||
f254e52c CM |
146 | /* 32 bytes in various csum fields */ |
147 | #define BTRFS_CSUM_SIZE 32 | |
607d432d JB |
148 | |
149 | /* csum types */ | |
150 | #define BTRFS_CSUM_TYPE_CRC32 0 | |
151 | ||
152 | static int btrfs_csum_sizes[] = { 4, 0 }; | |
153 | ||
509659cd | 154 | /* four bytes for CRC32 */ |
3954401f | 155 | #define BTRFS_EMPTY_DIR_SIZE 0 |
f254e52c | 156 | |
fabb5681 CM |
157 | #define BTRFS_FT_UNKNOWN 0 |
158 | #define BTRFS_FT_REG_FILE 1 | |
159 | #define BTRFS_FT_DIR 2 | |
160 | #define BTRFS_FT_CHRDEV 3 | |
161 | #define BTRFS_FT_BLKDEV 4 | |
162 | #define BTRFS_FT_FIFO 5 | |
163 | #define BTRFS_FT_SOCK 6 | |
164 | #define BTRFS_FT_SYMLINK 7 | |
5103e947 JB |
165 | #define BTRFS_FT_XATTR 8 |
166 | #define BTRFS_FT_MAX 9 | |
fabb5681 | 167 | |
fec577fb | 168 | /* |
d4a78947 WF |
169 | * The key defines the order in the tree, and so it also defines (optimal) |
170 | * block layout. | |
171 | * | |
172 | * objectid corresponds to the inode number. | |
173 | * | |
174 | * type tells us things about the object, and is a kind of stream selector. | |
175 | * so for a given inode, keys with type of 1 might refer to the inode data, | |
176 | * type of 2 may point to file data in the btree and type == 3 may point to | |
177 | * extents. | |
fec577fb CM |
178 | * |
179 | * offset is the starting byte offset for this key in the stream. | |
e2fa7227 CM |
180 | * |
181 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | |
182 | * in cpu native order. Otherwise they are identical and their sizes | |
183 | * should be the same (ie both packed) | |
fec577fb | 184 | */ |
e2fa7227 CM |
185 | struct btrfs_disk_key { |
186 | __le64 objectid; | |
5f39d397 | 187 | u8 type; |
70b2befd | 188 | __le64 offset; |
e2fa7227 CM |
189 | } __attribute__ ((__packed__)); |
190 | ||
191 | struct btrfs_key { | |
eb60ceac | 192 | u64 objectid; |
5f39d397 | 193 | u8 type; |
70b2befd | 194 | u64 offset; |
eb60ceac CM |
195 | } __attribute__ ((__packed__)); |
196 | ||
0b86a832 CM |
197 | struct btrfs_mapping_tree { |
198 | struct extent_map_tree map_tree; | |
199 | }; | |
200 | ||
0b86a832 CM |
201 | struct btrfs_dev_item { |
202 | /* the internal btrfs device id */ | |
203 | __le64 devid; | |
204 | ||
205 | /* size of the device */ | |
206 | __le64 total_bytes; | |
207 | ||
208 | /* bytes used */ | |
209 | __le64 bytes_used; | |
210 | ||
211 | /* optimal io alignment for this device */ | |
212 | __le32 io_align; | |
213 | ||
214 | /* optimal io width for this device */ | |
215 | __le32 io_width; | |
216 | ||
217 | /* minimal io size for this device */ | |
218 | __le32 sector_size; | |
219 | ||
0b86a832 CM |
220 | /* type and info about this device */ |
221 | __le64 type; | |
222 | ||
2b82032c YZ |
223 | /* expected generation for this device */ |
224 | __le64 generation; | |
225 | ||
c3027eb5 CM |
226 | /* |
227 | * starting byte of this partition on the device, | |
d4a78947 | 228 | * to allow for stripe alignment in the future |
c3027eb5 CM |
229 | */ |
230 | __le64 start_offset; | |
231 | ||
e17cade2 CM |
232 | /* grouping information for allocation decisions */ |
233 | __le32 dev_group; | |
234 | ||
235 | /* seek speed 0-100 where 100 is fastest */ | |
236 | u8 seek_speed; | |
237 | ||
238 | /* bandwidth 0-100 where 100 is fastest */ | |
239 | u8 bandwidth; | |
240 | ||
0d81ba5d | 241 | /* btrfs generated uuid for this device */ |
e17cade2 | 242 | u8 uuid[BTRFS_UUID_SIZE]; |
2b82032c YZ |
243 | |
244 | /* uuid of FS who owns this device */ | |
245 | u8 fsid[BTRFS_UUID_SIZE]; | |
0b86a832 CM |
246 | } __attribute__ ((__packed__)); |
247 | ||
248 | struct btrfs_stripe { | |
249 | __le64 devid; | |
250 | __le64 offset; | |
e17cade2 | 251 | u8 dev_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
252 | } __attribute__ ((__packed__)); |
253 | ||
254 | struct btrfs_chunk { | |
e17cade2 CM |
255 | /* size of this chunk in bytes */ |
256 | __le64 length; | |
257 | ||
258 | /* objectid of the root referencing this chunk */ | |
0b86a832 | 259 | __le64 owner; |
e17cade2 | 260 | |
0b86a832 CM |
261 | __le64 stripe_len; |
262 | __le64 type; | |
263 | ||
264 | /* optimal io alignment for this chunk */ | |
265 | __le32 io_align; | |
266 | ||
267 | /* optimal io width for this chunk */ | |
268 | __le32 io_width; | |
269 | ||
270 | /* minimal io size for this chunk */ | |
271 | __le32 sector_size; | |
272 | ||
273 | /* 2^16 stripes is quite a lot, a second limit is the size of a single | |
274 | * item in the btree | |
275 | */ | |
276 | __le16 num_stripes; | |
321aecc6 CM |
277 | |
278 | /* sub stripes only matter for raid10 */ | |
279 | __le16 sub_stripes; | |
0b86a832 CM |
280 | struct btrfs_stripe stripe; |
281 | /* additional stripes go here */ | |
282 | } __attribute__ ((__packed__)); | |
283 | ||
0af3d00b JB |
284 | #define BTRFS_FREE_SPACE_EXTENT 1 |
285 | #define BTRFS_FREE_SPACE_BITMAP 2 | |
286 | ||
287 | struct btrfs_free_space_entry { | |
288 | __le64 offset; | |
289 | __le64 bytes; | |
290 | u8 type; | |
291 | } __attribute__ ((__packed__)); | |
292 | ||
293 | struct btrfs_free_space_header { | |
294 | struct btrfs_disk_key location; | |
295 | __le64 generation; | |
296 | __le64 num_entries; | |
297 | __le64 num_bitmaps; | |
298 | } __attribute__ ((__packed__)); | |
299 | ||
0b86a832 CM |
300 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) |
301 | { | |
302 | BUG_ON(num_stripes == 0); | |
303 | return sizeof(struct btrfs_chunk) + | |
304 | sizeof(struct btrfs_stripe) * (num_stripes - 1); | |
305 | } | |
306 | ||
5d4f98a2 YZ |
307 | #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) |
308 | #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) | |
acce952b | 309 | |
310 | /* | |
311 | * File system states | |
312 | */ | |
313 | ||
314 | /* Errors detected */ | |
315 | #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2) | |
316 | ||
5d4f98a2 YZ |
317 | #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32) |
318 | #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33) | |
319 | ||
320 | #define BTRFS_BACKREF_REV_MAX 256 | |
321 | #define BTRFS_BACKREF_REV_SHIFT 56 | |
322 | #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ | |
323 | BTRFS_BACKREF_REV_SHIFT) | |
324 | ||
325 | #define BTRFS_OLD_BACKREF_REV 0 | |
326 | #define BTRFS_MIXED_BACKREF_REV 1 | |
63b10fc4 | 327 | |
fec577fb CM |
328 | /* |
329 | * every tree block (leaf or node) starts with this header. | |
330 | */ | |
bb492bb0 | 331 | struct btrfs_header { |
e17cade2 | 332 | /* these first four must match the super block */ |
f254e52c | 333 | u8 csum[BTRFS_CSUM_SIZE]; |
5f39d397 | 334 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 335 | __le64 bytenr; /* which block this node is supposed to live in */ |
63b10fc4 | 336 | __le64 flags; |
e17cade2 CM |
337 | |
338 | /* allowed to be different from the super from here on down */ | |
339 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; | |
7f5c1516 | 340 | __le64 generation; |
4d775673 | 341 | __le64 owner; |
5f39d397 | 342 | __le32 nritems; |
9a6f11ed | 343 | u8 level; |
eb60ceac CM |
344 | } __attribute__ ((__packed__)); |
345 | ||
5f39d397 | 346 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
d397712b CM |
347 | sizeof(struct btrfs_header)) / \ |
348 | sizeof(struct btrfs_key_ptr)) | |
123abc88 | 349 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
5f39d397 | 350 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
236454df CM |
351 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
352 | sizeof(struct btrfs_item) - \ | |
353 | sizeof(struct btrfs_file_extent_item)) | |
f34f57a3 YZ |
354 | #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
355 | sizeof(struct btrfs_item) -\ | |
356 | sizeof(struct btrfs_dir_item)) | |
eb60ceac | 357 | |
0b86a832 CM |
358 | |
359 | /* | |
360 | * this is a very generous portion of the super block, giving us | |
361 | * room to translate 14 chunks with 3 stripes each. | |
362 | */ | |
363 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 | |
7ae9c09d | 364 | #define BTRFS_LABEL_SIZE 256 |
0b86a832 | 365 | |
af31f5e5 CM |
366 | /* |
367 | * just in case we somehow lose the roots and are not able to mount, | |
368 | * we store an array of the roots from previous transactions | |
369 | * in the super. | |
370 | */ | |
371 | #define BTRFS_NUM_BACKUP_ROOTS 4 | |
372 | struct btrfs_root_backup { | |
373 | __le64 tree_root; | |
374 | __le64 tree_root_gen; | |
375 | ||
376 | __le64 chunk_root; | |
377 | __le64 chunk_root_gen; | |
378 | ||
379 | __le64 extent_root; | |
380 | __le64 extent_root_gen; | |
381 | ||
382 | __le64 fs_root; | |
383 | __le64 fs_root_gen; | |
384 | ||
385 | __le64 dev_root; | |
386 | __le64 dev_root_gen; | |
387 | ||
388 | __le64 csum_root; | |
389 | __le64 csum_root_gen; | |
390 | ||
391 | __le64 total_bytes; | |
392 | __le64 bytes_used; | |
393 | __le64 num_devices; | |
394 | /* future */ | |
395 | __le64 unsed_64[4]; | |
396 | ||
397 | u8 tree_root_level; | |
398 | u8 chunk_root_level; | |
399 | u8 extent_root_level; | |
400 | u8 fs_root_level; | |
401 | u8 dev_root_level; | |
402 | u8 csum_root_level; | |
403 | /* future and to align */ | |
404 | u8 unused_8[10]; | |
405 | } __attribute__ ((__packed__)); | |
406 | ||
fec577fb CM |
407 | /* |
408 | * the super block basically lists the main trees of the FS | |
409 | * it currently lacks any block count etc etc | |
410 | */ | |
234b63a0 | 411 | struct btrfs_super_block { |
f254e52c | 412 | u8 csum[BTRFS_CSUM_SIZE]; |
63b10fc4 | 413 | /* the first 4 fields must match struct btrfs_header */ |
2b82032c | 414 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
db94535d | 415 | __le64 bytenr; /* this block number */ |
63b10fc4 | 416 | __le64 flags; |
e17cade2 CM |
417 | |
418 | /* allowed to be different from the btrfs_header from here own down */ | |
3768f368 | 419 | __le64 magic; |
3768f368 CM |
420 | __le64 generation; |
421 | __le64 root; | |
0b86a832 | 422 | __le64 chunk_root; |
e02119d5 | 423 | __le64 log_root; |
c3027eb5 CM |
424 | |
425 | /* this will help find the new super based on the log root */ | |
426 | __le64 log_root_transid; | |
db94535d CM |
427 | __le64 total_bytes; |
428 | __le64 bytes_used; | |
2e635a27 | 429 | __le64 root_dir_objectid; |
8a4b83cc | 430 | __le64 num_devices; |
5f39d397 CM |
431 | __le32 sectorsize; |
432 | __le32 nodesize; | |
433 | __le32 leafsize; | |
87ee04eb | 434 | __le32 stripesize; |
0b86a832 | 435 | __le32 sys_chunk_array_size; |
84234f3a | 436 | __le64 chunk_root_generation; |
f2b636e8 JB |
437 | __le64 compat_flags; |
438 | __le64 compat_ro_flags; | |
439 | __le64 incompat_flags; | |
607d432d | 440 | __le16 csum_type; |
db94535d | 441 | u8 root_level; |
0b86a832 | 442 | u8 chunk_root_level; |
e02119d5 | 443 | u8 log_root_level; |
0d81ba5d | 444 | struct btrfs_dev_item dev_item; |
c3027eb5 | 445 | |
7ae9c09d | 446 | char label[BTRFS_LABEL_SIZE]; |
c3027eb5 | 447 | |
0af3d00b JB |
448 | __le64 cache_generation; |
449 | ||
c3027eb5 | 450 | /* future expansion */ |
0af3d00b | 451 | __le64 reserved[31]; |
0b86a832 | 452 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
af31f5e5 | 453 | struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; |
cfaa7295 CM |
454 | } __attribute__ ((__packed__)); |
455 | ||
f2b636e8 JB |
456 | /* |
457 | * Compat flags that we support. If any incompat flags are set other than the | |
458 | * ones specified below then we will fail to mount | |
459 | */ | |
5d4f98a2 | 460 | #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) |
0af3d00b | 461 | #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1) |
67377734 | 462 | #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2) |
a6fa6fae | 463 | #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3) |
5d4f98a2 YZ |
464 | |
465 | #define BTRFS_FEATURE_COMPAT_SUPP 0ULL | |
466 | #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL | |
0af3d00b JB |
467 | #define BTRFS_FEATURE_INCOMPAT_SUPP \ |
468 | (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ | |
67377734 | 469 | BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ |
a6fa6fae LZ |
470 | BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ |
471 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO) | |
f2b636e8 | 472 | |
fec577fb | 473 | /* |
62e2749e | 474 | * A leaf is full of items. offset and size tell us where to find |
fec577fb CM |
475 | * the item in the leaf (relative to the start of the data area) |
476 | */ | |
0783fcfc | 477 | struct btrfs_item { |
e2fa7227 | 478 | struct btrfs_disk_key key; |
123abc88 | 479 | __le32 offset; |
5f39d397 | 480 | __le32 size; |
eb60ceac CM |
481 | } __attribute__ ((__packed__)); |
482 | ||
fec577fb CM |
483 | /* |
484 | * leaves have an item area and a data area: | |
485 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
486 | * | |
487 | * The data is separate from the items to get the keys closer together | |
488 | * during searches. | |
489 | */ | |
234b63a0 | 490 | struct btrfs_leaf { |
bb492bb0 | 491 | struct btrfs_header header; |
123abc88 | 492 | struct btrfs_item items[]; |
eb60ceac CM |
493 | } __attribute__ ((__packed__)); |
494 | ||
fec577fb CM |
495 | /* |
496 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
497 | * other blocks | |
498 | */ | |
123abc88 CM |
499 | struct btrfs_key_ptr { |
500 | struct btrfs_disk_key key; | |
501 | __le64 blockptr; | |
74493f7a | 502 | __le64 generation; |
123abc88 CM |
503 | } __attribute__ ((__packed__)); |
504 | ||
234b63a0 | 505 | struct btrfs_node { |
bb492bb0 | 506 | struct btrfs_header header; |
123abc88 | 507 | struct btrfs_key_ptr ptrs[]; |
eb60ceac CM |
508 | } __attribute__ ((__packed__)); |
509 | ||
fec577fb | 510 | /* |
234b63a0 CM |
511 | * btrfs_paths remember the path taken from the root down to the leaf. |
512 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
fec577fb CM |
513 | * to any other levels that are present. |
514 | * | |
515 | * The slots array records the index of the item or block pointer | |
516 | * used while walking the tree. | |
517 | */ | |
234b63a0 | 518 | struct btrfs_path { |
5f39d397 | 519 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
234b63a0 | 520 | int slots[BTRFS_MAX_LEVEL]; |
925baedd CM |
521 | /* if there is real range locking, this locks field will change */ |
522 | int locks[BTRFS_MAX_LEVEL]; | |
3c69faec | 523 | int reada; |
925baedd | 524 | /* keep some upper locks as we walk down */ |
6702ed49 | 525 | int lowest_level; |
459931ec CM |
526 | |
527 | /* | |
528 | * set by btrfs_split_item, tells search_slot to keep all locks | |
529 | * and to force calls to keep space in the nodes | |
530 | */ | |
b9473439 CM |
531 | unsigned int search_for_split:1; |
532 | unsigned int keep_locks:1; | |
533 | unsigned int skip_locking:1; | |
534 | unsigned int leave_spinning:1; | |
5d4f98a2 | 535 | unsigned int search_commit_root:1; |
eb60ceac | 536 | }; |
5de08d7d | 537 | |
62e2749e CM |
538 | /* |
539 | * items in the extent btree are used to record the objectid of the | |
540 | * owner of the block and the number of references | |
541 | */ | |
5d4f98a2 | 542 | |
62e2749e | 543 | struct btrfs_extent_item { |
5d4f98a2 YZ |
544 | __le64 refs; |
545 | __le64 generation; | |
546 | __le64 flags; | |
547 | } __attribute__ ((__packed__)); | |
548 | ||
549 | struct btrfs_extent_item_v0 { | |
62e2749e | 550 | __le32 refs; |
74493f7a CM |
551 | } __attribute__ ((__packed__)); |
552 | ||
5d4f98a2 YZ |
553 | #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \ |
554 | sizeof(struct btrfs_item)) | |
555 | ||
556 | #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0) | |
557 | #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1) | |
558 | ||
559 | /* following flags only apply to tree blocks */ | |
560 | ||
561 | /* use full backrefs for extent pointers in the block */ | |
562 | #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8) | |
563 | ||
a2de733c AJ |
564 | /* |
565 | * this flag is only used internally by scrub and may be changed at any time | |
566 | * it is only declared here to avoid collisions | |
567 | */ | |
568 | #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48) | |
569 | ||
5d4f98a2 YZ |
570 | struct btrfs_tree_block_info { |
571 | struct btrfs_disk_key key; | |
572 | u8 level; | |
573 | } __attribute__ ((__packed__)); | |
574 | ||
575 | struct btrfs_extent_data_ref { | |
576 | __le64 root; | |
577 | __le64 objectid; | |
578 | __le64 offset; | |
579 | __le32 count; | |
580 | } __attribute__ ((__packed__)); | |
581 | ||
582 | struct btrfs_shared_data_ref { | |
583 | __le32 count; | |
584 | } __attribute__ ((__packed__)); | |
585 | ||
586 | struct btrfs_extent_inline_ref { | |
587 | u8 type; | |
1bec1aed | 588 | __le64 offset; |
5d4f98a2 YZ |
589 | } __attribute__ ((__packed__)); |
590 | ||
591 | /* old style backrefs item */ | |
592 | struct btrfs_extent_ref_v0 { | |
74493f7a CM |
593 | __le64 root; |
594 | __le64 generation; | |
595 | __le64 objectid; | |
5d4f98a2 | 596 | __le32 count; |
62e2749e CM |
597 | } __attribute__ ((__packed__)); |
598 | ||
5d4f98a2 | 599 | |
0b86a832 CM |
600 | /* dev extents record free space on individual devices. The owner |
601 | * field points back to the chunk allocation mapping tree that allocated | |
e17cade2 | 602 | * the extent. The chunk tree uuid field is a way to double check the owner |
0b86a832 CM |
603 | */ |
604 | struct btrfs_dev_extent { | |
e17cade2 CM |
605 | __le64 chunk_tree; |
606 | __le64 chunk_objectid; | |
607 | __le64 chunk_offset; | |
0b86a832 | 608 | __le64 length; |
e17cade2 | 609 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
0b86a832 CM |
610 | } __attribute__ ((__packed__)); |
611 | ||
3954401f | 612 | struct btrfs_inode_ref { |
aec7477b | 613 | __le64 index; |
3954401f CM |
614 | __le16 name_len; |
615 | /* name goes here */ | |
616 | } __attribute__ ((__packed__)); | |
617 | ||
0b86a832 | 618 | struct btrfs_timespec { |
f254e52c | 619 | __le64 sec; |
1e1d2701 CM |
620 | __le32 nsec; |
621 | } __attribute__ ((__packed__)); | |
622 | ||
95029d7d | 623 | enum btrfs_compression_type { |
261507a0 LZ |
624 | BTRFS_COMPRESS_NONE = 0, |
625 | BTRFS_COMPRESS_ZLIB = 1, | |
a6fa6fae LZ |
626 | BTRFS_COMPRESS_LZO = 2, |
627 | BTRFS_COMPRESS_TYPES = 2, | |
628 | BTRFS_COMPRESS_LAST = 3, | |
95029d7d | 629 | }; |
c8b97818 | 630 | |
1e1d2701 | 631 | struct btrfs_inode_item { |
e02119d5 | 632 | /* nfs style generation number */ |
1e1d2701 | 633 | __le64 generation; |
e02119d5 CM |
634 | /* transid that last touched this inode */ |
635 | __le64 transid; | |
1e1d2701 | 636 | __le64 size; |
a76a3cd4 | 637 | __le64 nbytes; |
31f3c99b | 638 | __le64 block_group; |
1e1d2701 CM |
639 | __le32 nlink; |
640 | __le32 uid; | |
641 | __le32 gid; | |
642 | __le32 mode; | |
0b86a832 | 643 | __le64 rdev; |
f2b636e8 | 644 | __le64 flags; |
c8b97818 | 645 | |
c3027eb5 CM |
646 | /* modification sequence number for NFS */ |
647 | __le64 sequence; | |
648 | ||
649 | /* | |
650 | * a little future expansion, for more than this we can | |
651 | * just grow the inode item and version it | |
652 | */ | |
653 | __le64 reserved[4]; | |
0b86a832 CM |
654 | struct btrfs_timespec atime; |
655 | struct btrfs_timespec ctime; | |
656 | struct btrfs_timespec mtime; | |
657 | struct btrfs_timespec otime; | |
1e1d2701 CM |
658 | } __attribute__ ((__packed__)); |
659 | ||
e02119d5 CM |
660 | struct btrfs_dir_log_item { |
661 | __le64 end; | |
662 | } __attribute__ ((__packed__)); | |
663 | ||
62e2749e | 664 | struct btrfs_dir_item { |
d6e4a428 | 665 | struct btrfs_disk_key location; |
e02119d5 | 666 | __le64 transid; |
5103e947 | 667 | __le16 data_len; |
a8a2ee0c | 668 | __le16 name_len; |
62e2749e CM |
669 | u8 type; |
670 | } __attribute__ ((__packed__)); | |
671 | ||
b83cc969 LZ |
672 | #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0) |
673 | ||
62e2749e | 674 | struct btrfs_root_item { |
d6e4a428 | 675 | struct btrfs_inode_item inode; |
84234f3a | 676 | __le64 generation; |
d6e4a428 | 677 | __le64 root_dirid; |
db94535d CM |
678 | __le64 bytenr; |
679 | __le64 byte_limit; | |
680 | __le64 bytes_used; | |
80ff3856 | 681 | __le64 last_snapshot; |
f2b636e8 | 682 | __le64 flags; |
62e2749e | 683 | __le32 refs; |
5eda7b5e CM |
684 | struct btrfs_disk_key drop_progress; |
685 | u8 drop_level; | |
db94535d | 686 | u8 level; |
9f5fae2f | 687 | } __attribute__ ((__packed__)); |
62e2749e | 688 | |
0660b5af CM |
689 | /* |
690 | * this is used for both forward and backward root refs | |
691 | */ | |
692 | struct btrfs_root_ref { | |
693 | __le64 dirid; | |
694 | __le64 sequence; | |
695 | __le16 name_len; | |
696 | } __attribute__ ((__packed__)); | |
697 | ||
0940ebf6 ID |
698 | struct btrfs_disk_balance_args { |
699 | /* | |
700 | * profiles to operate on, single is denoted by | |
701 | * BTRFS_AVAIL_ALLOC_BIT_SINGLE | |
702 | */ | |
703 | __le64 profiles; | |
704 | ||
705 | /* usage filter */ | |
706 | __le64 usage; | |
707 | ||
708 | /* devid filter */ | |
709 | __le64 devid; | |
710 | ||
711 | /* devid subset filter [pstart..pend) */ | |
712 | __le64 pstart; | |
713 | __le64 pend; | |
714 | ||
715 | /* btrfs virtual address space subset filter [vstart..vend) */ | |
716 | __le64 vstart; | |
717 | __le64 vend; | |
718 | ||
719 | /* | |
720 | * profile to convert to, single is denoted by | |
721 | * BTRFS_AVAIL_ALLOC_BIT_SINGLE | |
722 | */ | |
723 | __le64 target; | |
724 | ||
725 | /* BTRFS_BALANCE_ARGS_* */ | |
726 | __le64 flags; | |
727 | ||
728 | __le64 unused[8]; | |
729 | } __attribute__ ((__packed__)); | |
730 | ||
731 | /* | |
732 | * store balance parameters to disk so that balance can be properly | |
733 | * resumed after crash or unmount | |
734 | */ | |
735 | struct btrfs_balance_item { | |
736 | /* BTRFS_BALANCE_* */ | |
737 | __le64 flags; | |
738 | ||
739 | struct btrfs_disk_balance_args data; | |
740 | struct btrfs_disk_balance_args meta; | |
741 | struct btrfs_disk_balance_args sys; | |
742 | ||
743 | __le64 unused[4]; | |
744 | } __attribute__ ((__packed__)); | |
745 | ||
d899e052 YZ |
746 | #define BTRFS_FILE_EXTENT_INLINE 0 |
747 | #define BTRFS_FILE_EXTENT_REG 1 | |
748 | #define BTRFS_FILE_EXTENT_PREALLOC 2 | |
236454df | 749 | |
9f5fae2f | 750 | struct btrfs_file_extent_item { |
c8b97818 CM |
751 | /* |
752 | * transaction id that created this extent | |
753 | */ | |
71951f35 | 754 | __le64 generation; |
c8b97818 CM |
755 | /* |
756 | * max number of bytes to hold this extent in ram | |
757 | * when we split a compressed extent we can't know how big | |
758 | * each of the resulting pieces will be. So, this is | |
759 | * an upper limit on the size of the extent in ram instead of | |
760 | * an exact limit. | |
761 | */ | |
762 | __le64 ram_bytes; | |
763 | ||
764 | /* | |
765 | * 32 bits for the various ways we might encode the data, | |
766 | * including compression and encryption. If any of these | |
767 | * are set to something a given disk format doesn't understand | |
768 | * it is treated like an incompat flag for reading and writing, | |
769 | * but not for stat. | |
770 | */ | |
771 | u8 compression; | |
772 | u8 encryption; | |
773 | __le16 other_encoding; /* spare for later use */ | |
774 | ||
775 | /* are we inline data or a real extent? */ | |
236454df | 776 | u8 type; |
c8b97818 | 777 | |
9f5fae2f CM |
778 | /* |
779 | * disk space consumed by the extent, checksum blocks are included | |
780 | * in these numbers | |
781 | */ | |
db94535d CM |
782 | __le64 disk_bytenr; |
783 | __le64 disk_num_bytes; | |
9f5fae2f | 784 | /* |
dee26a9f | 785 | * the logical offset in file blocks (no csums) |
9f5fae2f CM |
786 | * this extent record is for. This allows a file extent to point |
787 | * into the middle of an existing extent on disk, sharing it | |
788 | * between two snapshots (useful if some bytes in the middle of the | |
789 | * extent have changed | |
790 | */ | |
791 | __le64 offset; | |
792 | /* | |
c8b97818 CM |
793 | * the logical number of file blocks (no csums included). This |
794 | * always reflects the size uncompressed and without encoding. | |
9f5fae2f | 795 | */ |
db94535d | 796 | __le64 num_bytes; |
c8b97818 | 797 | |
9f5fae2f CM |
798 | } __attribute__ ((__packed__)); |
799 | ||
f254e52c | 800 | struct btrfs_csum_item { |
509659cd | 801 | u8 csum; |
f254e52c CM |
802 | } __attribute__ ((__packed__)); |
803 | ||
0b86a832 | 804 | /* different types of block groups (and chunks) */ |
52ba6929 ID |
805 | #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0) |
806 | #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1) | |
807 | #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2) | |
808 | #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3) | |
809 | #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4) | |
810 | #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5) | |
811 | #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6) | |
a46d11a8 | 812 | #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE |
52ba6929 ID |
813 | #define BTRFS_NR_RAID_TYPES 5 |
814 | ||
815 | #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \ | |
816 | BTRFS_BLOCK_GROUP_SYSTEM | \ | |
817 | BTRFS_BLOCK_GROUP_METADATA) | |
818 | ||
819 | #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \ | |
820 | BTRFS_BLOCK_GROUP_RAID1 | \ | |
821 | BTRFS_BLOCK_GROUP_DUP | \ | |
822 | BTRFS_BLOCK_GROUP_RAID10) | |
a46d11a8 ID |
823 | /* |
824 | * We need a bit for restriper to be able to tell when chunks of type | |
825 | * SINGLE are available. This "extended" profile format is used in | |
826 | * fs_info->avail_*_alloc_bits (in-memory) and balance item fields | |
827 | * (on-disk). The corresponding on-disk bit in chunk.type is reserved | |
828 | * to avoid remappings between two formats in future. | |
829 | */ | |
830 | #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48) | |
831 | ||
9078a3e1 CM |
832 | struct btrfs_block_group_item { |
833 | __le64 used; | |
0b86a832 CM |
834 | __le64 chunk_objectid; |
835 | __le64 flags; | |
9078a3e1 CM |
836 | } __attribute__ ((__packed__)); |
837 | ||
6324fbf3 CM |
838 | struct btrfs_space_info { |
839 | u64 flags; | |
6a63209f | 840 | |
89a55897 JB |
841 | u64 total_bytes; /* total bytes in the space, |
842 | this doesn't take mirrors into account */ | |
b742bb82 | 843 | u64 bytes_used; /* total bytes used, |
e9c54999 | 844 | this doesn't take mirrors into account */ |
6a63209f JB |
845 | u64 bytes_pinned; /* total bytes pinned, will be freed when the |
846 | transaction finishes */ | |
847 | u64 bytes_reserved; /* total bytes the allocator has reserved for | |
848 | current allocations */ | |
849 | u64 bytes_readonly; /* total bytes that are read only */ | |
8929ecfa | 850 | |
6a63209f | 851 | u64 bytes_may_use; /* number of bytes that may be used for |
9ed74f2d | 852 | delalloc/allocations */ |
b742bb82 | 853 | u64 disk_used; /* total bytes used on disk */ |
89a55897 JB |
854 | u64 disk_total; /* total bytes on disk, takes mirrors into |
855 | account */ | |
6a63209f | 856 | |
36e39c40 CM |
857 | /* |
858 | * we bump reservation progress every time we decrement | |
859 | * bytes_reserved. This way people waiting for reservations | |
860 | * know something good has happened and they can check | |
861 | * for progress. The number here isn't to be trusted, it | |
862 | * just shows reclaim activity | |
863 | */ | |
864 | unsigned long reservation_progress; | |
865 | ||
4ea02885 | 866 | unsigned int full:1; /* indicates that we cannot allocate any more |
6a63209f | 867 | chunks for this space */ |
4ea02885 | 868 | unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ |
6d74119f | 869 | |
fdb5effd JB |
870 | unsigned int flush:1; /* set if we are trying to make space */ |
871 | ||
4ea02885 DS |
872 | unsigned int force_alloc; /* set if we need to force a chunk |
873 | alloc for this space */ | |
6a63209f | 874 | |
6324fbf3 | 875 | struct list_head list; |
0f9dd46c JB |
876 | |
877 | /* for block groups in our same type */ | |
b742bb82 | 878 | struct list_head block_groups[BTRFS_NR_RAID_TYPES]; |
0f9dd46c | 879 | spinlock_t lock; |
80eb234a | 880 | struct rw_semaphore groups_sem; |
fdb5effd | 881 | wait_queue_head_t wait; |
0f9dd46c JB |
882 | }; |
883 | ||
f0486c68 YZ |
884 | struct btrfs_block_rsv { |
885 | u64 size; | |
886 | u64 reserved; | |
f0486c68 | 887 | struct btrfs_space_info *space_info; |
f0486c68 | 888 | spinlock_t lock; |
c08782da | 889 | unsigned int full; |
f0486c68 YZ |
890 | }; |
891 | ||
fa9c0d79 CM |
892 | /* |
893 | * free clusters are used to claim free space in relatively large chunks, | |
894 | * allowing us to do less seeky writes. They are used for all metadata | |
895 | * allocations and data allocations in ssd mode. | |
896 | */ | |
897 | struct btrfs_free_cluster { | |
898 | spinlock_t lock; | |
899 | spinlock_t refill_lock; | |
900 | struct rb_root root; | |
901 | ||
902 | /* largest extent in this cluster */ | |
903 | u64 max_size; | |
904 | ||
905 | /* first extent starting offset */ | |
906 | u64 window_start; | |
907 | ||
908 | struct btrfs_block_group_cache *block_group; | |
909 | /* | |
910 | * when a cluster is allocated from a block group, we put the | |
911 | * cluster onto a list in the block group so that it can | |
912 | * be freed before the block group is freed. | |
913 | */ | |
914 | struct list_head block_group_list; | |
6324fbf3 CM |
915 | }; |
916 | ||
817d52f8 JB |
917 | enum btrfs_caching_type { |
918 | BTRFS_CACHE_NO = 0, | |
919 | BTRFS_CACHE_STARTED = 1, | |
291c7d2f JB |
920 | BTRFS_CACHE_FAST = 2, |
921 | BTRFS_CACHE_FINISHED = 3, | |
817d52f8 JB |
922 | }; |
923 | ||
0af3d00b JB |
924 | enum btrfs_disk_cache_state { |
925 | BTRFS_DC_WRITTEN = 0, | |
926 | BTRFS_DC_ERROR = 1, | |
927 | BTRFS_DC_CLEAR = 2, | |
928 | BTRFS_DC_SETUP = 3, | |
929 | BTRFS_DC_NEED_WRITE = 4, | |
930 | }; | |
931 | ||
11833d66 YZ |
932 | struct btrfs_caching_control { |
933 | struct list_head list; | |
934 | struct mutex mutex; | |
935 | wait_queue_head_t wait; | |
bab39bf9 | 936 | struct btrfs_work work; |
11833d66 YZ |
937 | struct btrfs_block_group_cache *block_group; |
938 | u64 progress; | |
939 | atomic_t count; | |
940 | }; | |
941 | ||
9078a3e1 CM |
942 | struct btrfs_block_group_cache { |
943 | struct btrfs_key key; | |
944 | struct btrfs_block_group_item item; | |
817d52f8 | 945 | struct btrfs_fs_info *fs_info; |
0af3d00b | 946 | struct inode *inode; |
c286ac48 | 947 | spinlock_t lock; |
324ae4df | 948 | u64 pinned; |
e8569813 | 949 | u64 reserved; |
1b2da372 | 950 | u64 bytes_super; |
0b86a832 | 951 | u64 flags; |
96303081 | 952 | u64 sectorsize; |
5b0e95bf | 953 | u64 cache_generation; |
0410c94a MK |
954 | unsigned int ro:1; |
955 | unsigned int dirty:1; | |
956 | unsigned int iref:1; | |
0af3d00b JB |
957 | |
958 | int disk_cache_state; | |
0f9dd46c | 959 | |
817d52f8 | 960 | /* cache tracking stuff */ |
817d52f8 | 961 | int cached; |
11833d66 YZ |
962 | struct btrfs_caching_control *caching_ctl; |
963 | u64 last_byte_to_unpin; | |
817d52f8 | 964 | |
0f9dd46c JB |
965 | struct btrfs_space_info *space_info; |
966 | ||
967 | /* free space cache stuff */ | |
34d52cb6 | 968 | struct btrfs_free_space_ctl *free_space_ctl; |
0f9dd46c JB |
969 | |
970 | /* block group cache stuff */ | |
971 | struct rb_node cache_node; | |
972 | ||
973 | /* for block groups in the same raid type */ | |
974 | struct list_head list; | |
d2fb3437 YZ |
975 | |
976 | /* usage count */ | |
977 | atomic_t count; | |
fa9c0d79 CM |
978 | |
979 | /* List of struct btrfs_free_clusters for this block group. | |
980 | * Today it will only have one thing on it, but that may change | |
981 | */ | |
982 | struct list_head cluster_list; | |
9078a3e1 | 983 | }; |
0b86a832 | 984 | |
5d4f98a2 | 985 | struct reloc_control; |
0b86a832 | 986 | struct btrfs_device; |
8a4b83cc | 987 | struct btrfs_fs_devices; |
c9e9f97b | 988 | struct btrfs_balance_control; |
16cdcec7 | 989 | struct btrfs_delayed_root; |
9f5fae2f | 990 | struct btrfs_fs_info { |
5f39d397 | 991 | u8 fsid[BTRFS_FSID_SIZE]; |
e17cade2 | 992 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
62e2749e CM |
993 | struct btrfs_root *extent_root; |
994 | struct btrfs_root *tree_root; | |
0b86a832 CM |
995 | struct btrfs_root *chunk_root; |
996 | struct btrfs_root *dev_root; | |
3de4586c | 997 | struct btrfs_root *fs_root; |
d20f7043 | 998 | struct btrfs_root *csum_root; |
e02119d5 CM |
999 | |
1000 | /* the log root tree is a directory of all the other log roots */ | |
1001 | struct btrfs_root *log_root_tree; | |
4df27c4d YZ |
1002 | |
1003 | spinlock_t fs_roots_radix_lock; | |
0f7d52f4 | 1004 | struct radix_tree_root fs_roots_radix; |
1a5bc167 | 1005 | |
0f9dd46c JB |
1006 | /* block group cache stuff */ |
1007 | spinlock_t block_group_cache_lock; | |
1008 | struct rb_root block_group_cache_tree; | |
1009 | ||
2bf64758 JB |
1010 | /* keep track of unallocated space */ |
1011 | spinlock_t free_chunk_lock; | |
1012 | u64 free_chunk_space; | |
1013 | ||
11833d66 YZ |
1014 | struct extent_io_tree freed_extents[2]; |
1015 | struct extent_io_tree *pinned_extents; | |
1a5bc167 | 1016 | |
0b86a832 CM |
1017 | /* logical->physical extent mapping */ |
1018 | struct btrfs_mapping_tree mapping_tree; | |
1019 | ||
16cdcec7 MX |
1020 | /* |
1021 | * block reservation for extent, checksum, root tree and | |
1022 | * delayed dir index item | |
1023 | */ | |
f0486c68 YZ |
1024 | struct btrfs_block_rsv global_block_rsv; |
1025 | /* block reservation for delay allocation */ | |
1026 | struct btrfs_block_rsv delalloc_block_rsv; | |
1027 | /* block reservation for metadata operations */ | |
1028 | struct btrfs_block_rsv trans_block_rsv; | |
1029 | /* block reservation for chunk tree */ | |
1030 | struct btrfs_block_rsv chunk_block_rsv; | |
6d668dda JB |
1031 | /* block reservation for delayed operations */ |
1032 | struct btrfs_block_rsv delayed_block_rsv; | |
f0486c68 YZ |
1033 | |
1034 | struct btrfs_block_rsv empty_block_rsv; | |
1035 | ||
293ffd5f | 1036 | u64 generation; |
15ee9bc7 | 1037 | u64 last_trans_committed; |
12fcfd22 CM |
1038 | |
1039 | /* | |
1040 | * this is updated to the current trans every time a full commit | |
1041 | * is required instead of the faster short fsync log commits | |
1042 | */ | |
1043 | u64 last_trans_log_full_commit; | |
21adbd5c | 1044 | unsigned long mount_opt:21; |
261507a0 | 1045 | unsigned long compress_type:4; |
6f568d35 | 1046 | u64 max_inline; |
8f662a76 | 1047 | u64 alloc_start; |
79154b1b | 1048 | struct btrfs_transaction *running_transaction; |
e6dcd2dc | 1049 | wait_queue_head_t transaction_throttle; |
f9295749 | 1050 | wait_queue_head_t transaction_wait; |
bb9c12c9 | 1051 | wait_queue_head_t transaction_blocked_wait; |
771ed689 | 1052 | wait_queue_head_t async_submit_wait; |
e02119d5 | 1053 | |
6c41761f DS |
1054 | struct btrfs_super_block *super_copy; |
1055 | struct btrfs_super_block *super_for_commit; | |
0b86a832 | 1056 | struct block_device *__bdev; |
e20d96d6 | 1057 | struct super_block *sb; |
d98237b3 | 1058 | struct inode *btree_inode; |
04160088 | 1059 | struct backing_dev_info bdi; |
e02119d5 | 1060 | struct mutex tree_log_mutex; |
a74a4b97 CM |
1061 | struct mutex transaction_kthread_mutex; |
1062 | struct mutex cleaner_mutex; | |
925baedd | 1063 | struct mutex chunk_mutex; |
7d9eb12c | 1064 | struct mutex volume_mutex; |
5a3f23d5 CM |
1065 | /* |
1066 | * this protects the ordered operations list only while we are | |
1067 | * processing all of the entries on it. This way we make | |
1068 | * sure the commit code doesn't find the list temporarily empty | |
1069 | * because another function happens to be doing non-waiting preflush | |
1070 | * before jumping into the main commit. | |
1071 | */ | |
1072 | struct mutex ordered_operations_mutex; | |
11833d66 | 1073 | struct rw_semaphore extent_commit_sem; |
5a3f23d5 | 1074 | |
c71bf099 | 1075 | struct rw_semaphore cleanup_work_sem; |
76dda93c | 1076 | |
c71bf099 | 1077 | struct rw_semaphore subvol_sem; |
76dda93c YZ |
1078 | struct srcu_struct subvol_srcu; |
1079 | ||
a4abeea4 | 1080 | spinlock_t trans_lock; |
7585717f CM |
1081 | /* |
1082 | * the reloc mutex goes with the trans lock, it is taken | |
1083 | * during commit to protect us from the relocation code | |
1084 | */ | |
1085 | struct mutex reloc_mutex; | |
1086 | ||
8fd17795 | 1087 | struct list_head trans_list; |
19c00ddc | 1088 | struct list_head hashers; |
facda1e7 | 1089 | struct list_head dead_roots; |
11833d66 | 1090 | struct list_head caching_block_groups; |
e02119d5 | 1091 | |
24bbcf04 YZ |
1092 | spinlock_t delayed_iput_lock; |
1093 | struct list_head delayed_iputs; | |
1094 | ||
cb03c743 | 1095 | atomic_t nr_async_submits; |
8c8bee1d | 1096 | atomic_t async_submit_draining; |
0986fe9e | 1097 | atomic_t nr_async_bios; |
771ed689 | 1098 | atomic_t async_delalloc_pages; |
a4abeea4 | 1099 | atomic_t open_ioctl_trans; |
ce9adaa5 | 1100 | |
3eaa2885 CM |
1101 | /* |
1102 | * this is used by the balancing code to wait for all the pending | |
1103 | * ordered extents | |
1104 | */ | |
1105 | spinlock_t ordered_extent_lock; | |
5a3f23d5 CM |
1106 | |
1107 | /* | |
1108 | * all of the data=ordered extents pending writeback | |
1109 | * these can span multiple transactions and basically include | |
1110 | * every dirty data page that isn't from nodatacow | |
1111 | */ | |
3eaa2885 | 1112 | struct list_head ordered_extents; |
5a3f23d5 CM |
1113 | |
1114 | /* | |
1115 | * all of the inodes that have delalloc bytes. It is possible for | |
1116 | * this list to be empty even when there is still dirty data=ordered | |
1117 | * extents waiting to finish IO. | |
1118 | */ | |
ea8c2819 | 1119 | struct list_head delalloc_inodes; |
3eaa2885 | 1120 | |
5a3f23d5 CM |
1121 | /* |
1122 | * special rename and truncate targets that must be on disk before | |
1123 | * we're allowed to commit. This is basically the ext3 style | |
1124 | * data=ordered list. | |
1125 | */ | |
1126 | struct list_head ordered_operations; | |
1127 | ||
8b712842 CM |
1128 | /* |
1129 | * there is a pool of worker threads for checksumming during writes | |
1130 | * and a pool for checksumming after reads. This is because readers | |
1131 | * can run with FS locks held, and the writers may be waiting for | |
1132 | * those locks. We don't want ordering in the pending list to cause | |
1133 | * deadlocks, and so the two are serviced separately. | |
1cc127b5 CM |
1134 | * |
1135 | * A third pool does submit_bio to avoid deadlocking with the other | |
1136 | * two | |
8b712842 | 1137 | */ |
61d92c32 | 1138 | struct btrfs_workers generic_worker; |
8b712842 | 1139 | struct btrfs_workers workers; |
771ed689 | 1140 | struct btrfs_workers delalloc_workers; |
8b712842 | 1141 | struct btrfs_workers endio_workers; |
d20f7043 | 1142 | struct btrfs_workers endio_meta_workers; |
cad321ad | 1143 | struct btrfs_workers endio_meta_write_workers; |
e6dcd2dc | 1144 | struct btrfs_workers endio_write_workers; |
0cb59c99 | 1145 | struct btrfs_workers endio_freespace_worker; |
1cc127b5 | 1146 | struct btrfs_workers submit_workers; |
bab39bf9 | 1147 | struct btrfs_workers caching_workers; |
90519d66 | 1148 | struct btrfs_workers readahead_workers; |
bab39bf9 | 1149 | |
247e743c CM |
1150 | /* |
1151 | * fixup workers take dirty pages that didn't properly go through | |
1152 | * the cow mechanism and make them safe to write. It happens | |
1153 | * for the sys_munmap function call path | |
1154 | */ | |
1155 | struct btrfs_workers fixup_workers; | |
16cdcec7 | 1156 | struct btrfs_workers delayed_workers; |
a74a4b97 CM |
1157 | struct task_struct *transaction_kthread; |
1158 | struct task_struct *cleaner_kthread; | |
4543df7e | 1159 | int thread_pool_size; |
8b712842 | 1160 | |
58176a96 JB |
1161 | struct kobject super_kobj; |
1162 | struct completion kobj_unregister; | |
e66f709b | 1163 | int do_barriers; |
facda1e7 | 1164 | int closing; |
e02119d5 | 1165 | int log_root_recovering; |
a22285a6 | 1166 | int enospc_unlink; |
a4abeea4 | 1167 | int trans_no_join; |
9f5fae2f | 1168 | |
324ae4df | 1169 | u64 total_pinned; |
b9473439 CM |
1170 | |
1171 | /* protected by the delalloc lock, used to keep from writing | |
1172 | * metadata until there is a nice batch | |
1173 | */ | |
1174 | u64 dirty_metadata_bytes; | |
0b86a832 CM |
1175 | struct list_head dirty_cowonly_roots; |
1176 | ||
8a4b83cc | 1177 | struct btrfs_fs_devices *fs_devices; |
4184ea7f CM |
1178 | |
1179 | /* | |
1180 | * the space_info list is almost entirely read only. It only changes | |
1181 | * when we add a new raid type to the FS, and that happens | |
1182 | * very rarely. RCU is used to protect it. | |
1183 | */ | |
6324fbf3 | 1184 | struct list_head space_info; |
4184ea7f | 1185 | |
5d4f98a2 YZ |
1186 | struct reloc_control *reloc_ctl; |
1187 | ||
1832a6d5 CM |
1188 | spinlock_t delalloc_lock; |
1189 | u64 delalloc_bytes; | |
fa9c0d79 CM |
1190 | |
1191 | /* data_alloc_cluster is only used in ssd mode */ | |
1192 | struct btrfs_free_cluster data_alloc_cluster; | |
1193 | ||
1194 | /* all metadata allocations go through this cluster */ | |
1195 | struct btrfs_free_cluster meta_alloc_cluster; | |
d18a2c44 | 1196 | |
4cb5300b CM |
1197 | /* auto defrag inodes go here */ |
1198 | spinlock_t defrag_inodes_lock; | |
1199 | struct rb_root defrag_inodes; | |
1200 | atomic_t defrag_running; | |
1201 | ||
31153d81 YZ |
1202 | spinlock_t ref_cache_lock; |
1203 | u64 total_ref_cache_size; | |
31153d81 | 1204 | |
a46d11a8 ID |
1205 | /* |
1206 | * these three are in extended format (availability of single | |
1207 | * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other | |
1208 | * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) | |
1209 | */ | |
d18a2c44 CM |
1210 | u64 avail_data_alloc_bits; |
1211 | u64 avail_metadata_alloc_bits; | |
1212 | u64 avail_system_alloc_bits; | |
788f20eb | 1213 | |
c9e9f97b ID |
1214 | /* restriper state */ |
1215 | spinlock_t balance_lock; | |
1216 | struct mutex balance_mutex; | |
837d5b6e ID |
1217 | atomic_t balance_running; |
1218 | atomic_t balance_pause_req; | |
a7e99c69 | 1219 | atomic_t balance_cancel_req; |
c9e9f97b | 1220 | struct btrfs_balance_control *balance_ctl; |
837d5b6e | 1221 | wait_queue_head_t balance_wait_q; |
c9e9f97b | 1222 | |
97e728d4 JB |
1223 | unsigned data_chunk_allocations; |
1224 | unsigned metadata_ratio; | |
1225 | ||
788f20eb | 1226 | void *bdev_holder; |
acce952b | 1227 | |
a2de733c AJ |
1228 | /* private scrub information */ |
1229 | struct mutex scrub_lock; | |
1230 | atomic_t scrubs_running; | |
1231 | atomic_t scrub_pause_req; | |
1232 | atomic_t scrubs_paused; | |
1233 | atomic_t scrub_cancel_req; | |
1234 | wait_queue_head_t scrub_pause_wait; | |
1235 | struct rw_semaphore scrub_super_lock; | |
1236 | int scrub_workers_refcnt; | |
1237 | struct btrfs_workers scrub_workers; | |
1238 | ||
21adbd5c SB |
1239 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
1240 | u32 check_integrity_print_mask; | |
1241 | #endif | |
1242 | ||
acce952b | 1243 | /* filesystem state */ |
1244 | u64 fs_state; | |
16cdcec7 MX |
1245 | |
1246 | struct btrfs_delayed_root *delayed_root; | |
af31f5e5 | 1247 | |
90519d66 AJ |
1248 | /* readahead tree */ |
1249 | spinlock_t reada_lock; | |
1250 | struct radix_tree_root reada_tree; | |
531f4b1a | 1251 | |
af31f5e5 CM |
1252 | /* next backup root to be overwritten */ |
1253 | int backup_root_index; | |
324ae4df | 1254 | }; |
0b86a832 | 1255 | |
9f5fae2f CM |
1256 | /* |
1257 | * in ram representation of the tree. extent_root is used for all allocations | |
f2458e1d | 1258 | * and for the extent tree extent_root root. |
9f5fae2f CM |
1259 | */ |
1260 | struct btrfs_root { | |
5f39d397 | 1261 | struct extent_buffer *node; |
925baedd | 1262 | |
5f39d397 | 1263 | struct extent_buffer *commit_root; |
e02119d5 | 1264 | struct btrfs_root *log_root; |
1a40e23b | 1265 | struct btrfs_root *reloc_root; |
31153d81 | 1266 | |
62e2749e CM |
1267 | struct btrfs_root_item root_item; |
1268 | struct btrfs_key root_key; | |
9f5fae2f | 1269 | struct btrfs_fs_info *fs_info; |
d0c803c4 CM |
1270 | struct extent_io_tree dirty_log_pages; |
1271 | ||
58176a96 JB |
1272 | struct kobject root_kobj; |
1273 | struct completion kobj_unregister; | |
a2135011 | 1274 | struct mutex objectid_mutex; |
7237f183 | 1275 | |
f0486c68 YZ |
1276 | spinlock_t accounting_lock; |
1277 | struct btrfs_block_rsv *block_rsv; | |
1278 | ||
581bb050 LZ |
1279 | /* free ino cache stuff */ |
1280 | struct mutex fs_commit_mutex; | |
1281 | struct btrfs_free_space_ctl *free_ino_ctl; | |
1282 | enum btrfs_caching_type cached; | |
1283 | spinlock_t cache_lock; | |
1284 | wait_queue_head_t cache_wait; | |
1285 | struct btrfs_free_space_ctl *free_ino_pinned; | |
1286 | u64 cache_progress; | |
82d5902d | 1287 | struct inode *cache_inode; |
581bb050 | 1288 | |
e02119d5 | 1289 | struct mutex log_mutex; |
7237f183 YZ |
1290 | wait_queue_head_t log_writer_wait; |
1291 | wait_queue_head_t log_commit_wait[2]; | |
1292 | atomic_t log_writers; | |
1293 | atomic_t log_commit[2]; | |
1294 | unsigned long log_transid; | |
257c62e1 | 1295 | unsigned long last_log_commit; |
7237f183 | 1296 | unsigned long log_batch; |
ff782e0a JB |
1297 | pid_t log_start_pid; |
1298 | bool log_multiple_pids; | |
ea8c2819 | 1299 | |
0f7d52f4 CM |
1300 | u64 objectid; |
1301 | u64 last_trans; | |
5f39d397 CM |
1302 | |
1303 | /* data allocations are done in sectorsize units */ | |
1304 | u32 sectorsize; | |
1305 | ||
1306 | /* node allocations are done in nodesize units */ | |
1307 | u32 nodesize; | |
1308 | ||
1309 | /* leaf allocations are done in leafsize units */ | |
1310 | u32 leafsize; | |
1311 | ||
87ee04eb CM |
1312 | u32 stripesize; |
1313 | ||
9f5fae2f | 1314 | u32 type; |
13a8a7c8 YZ |
1315 | |
1316 | u64 highest_objectid; | |
7585717f CM |
1317 | |
1318 | /* btrfs_record_root_in_trans is a multi-step process, | |
1319 | * and it can race with the balancing code. But the | |
1320 | * race is very small, and only the first time the root | |
1321 | * is added to each transaction. So in_trans_setup | |
1322 | * is used to tell us when more checks are required | |
1323 | */ | |
1324 | unsigned long in_trans_setup; | |
9f3a7427 | 1325 | int ref_cows; |
0b86a832 | 1326 | int track_dirty; |
4df27c4d YZ |
1327 | int in_radix; |
1328 | ||
3f157a2f | 1329 | u64 defrag_trans_start; |
6702ed49 | 1330 | struct btrfs_key defrag_progress; |
0ef3e66b | 1331 | struct btrfs_key defrag_max; |
6702ed49 | 1332 | int defrag_running; |
58176a96 | 1333 | char *name; |
0b86a832 CM |
1334 | |
1335 | /* the dirty list is only used by non-reference counted roots */ | |
1336 | struct list_head dirty_list; | |
7b128766 | 1337 | |
5d4f98a2 YZ |
1338 | struct list_head root_list; |
1339 | ||
d68fc57b | 1340 | spinlock_t orphan_lock; |
7b128766 | 1341 | struct list_head orphan_list; |
d68fc57b YZ |
1342 | struct btrfs_block_rsv *orphan_block_rsv; |
1343 | int orphan_item_inserted; | |
1344 | int orphan_cleanup_state; | |
3394e160 | 1345 | |
5d4f98a2 YZ |
1346 | spinlock_t inode_lock; |
1347 | /* red-black tree that keeps track of in-memory inodes */ | |
1348 | struct rb_root inode_tree; | |
1349 | ||
16cdcec7 MX |
1350 | /* |
1351 | * radix tree that keeps track of delayed nodes of every inode, | |
1352 | * protected by inode_lock | |
1353 | */ | |
1354 | struct radix_tree_root delayed_nodes_tree; | |
3394e160 CM |
1355 | /* |
1356 | * right now this just gets used so that a root has its own devid | |
1357 | * for stat. It may be used for more later | |
1358 | */ | |
0ee5dc67 | 1359 | dev_t anon_dev; |
f1ebcc74 LB |
1360 | |
1361 | int force_cow; | |
62e2749e CM |
1362 | }; |
1363 | ||
4cb5300b CM |
1364 | struct btrfs_ioctl_defrag_range_args { |
1365 | /* start of the defrag operation */ | |
1366 | __u64 start; | |
1367 | ||
1368 | /* number of bytes to defrag, use (u64)-1 to say all */ | |
1369 | __u64 len; | |
1370 | ||
1371 | /* | |
1372 | * flags for the operation, which can include turning | |
1373 | * on compression for this one defrag | |
1374 | */ | |
1375 | __u64 flags; | |
1376 | ||
1377 | /* | |
1378 | * any extent bigger than this will be considered | |
1379 | * already defragged. Use 0 to take the kernel default | |
1380 | * Use 1 to say every single extent must be rewritten | |
1381 | */ | |
1382 | __u32 extent_thresh; | |
1383 | ||
1384 | /* | |
1385 | * which compression method to use if turning on compression | |
1386 | * for this defrag operation. If unspecified, zlib will | |
1387 | * be used | |
1388 | */ | |
1389 | __u32 compress_type; | |
1390 | ||
1391 | /* spare for later */ | |
1392 | __u32 unused[4]; | |
1393 | }; | |
1394 | ||
1395 | ||
1e1d2701 CM |
1396 | /* |
1397 | * inode items have the data typically returned from stat and store other | |
1398 | * info about object characteristics. There is one for every file and dir in | |
1399 | * the FS | |
1400 | */ | |
9078a3e1 | 1401 | #define BTRFS_INODE_ITEM_KEY 1 |
0660b5af CM |
1402 | #define BTRFS_INODE_REF_KEY 12 |
1403 | #define BTRFS_XATTR_ITEM_KEY 24 | |
1404 | #define BTRFS_ORPHAN_ITEM_KEY 48 | |
9078a3e1 | 1405 | /* reserve 2-15 close to the inode for later flexibility */ |
1e1d2701 CM |
1406 | |
1407 | /* | |
1408 | * dir items are the name -> inode pointers in a directory. There is one | |
1409 | * for every name in a directory. | |
1410 | */ | |
0660b5af CM |
1411 | #define BTRFS_DIR_LOG_ITEM_KEY 60 |
1412 | #define BTRFS_DIR_LOG_INDEX_KEY 72 | |
1413 | #define BTRFS_DIR_ITEM_KEY 84 | |
1414 | #define BTRFS_DIR_INDEX_KEY 96 | |
1e1d2701 | 1415 | /* |
9078a3e1 | 1416 | * extent data is for file data |
1e1d2701 | 1417 | */ |
0660b5af | 1418 | #define BTRFS_EXTENT_DATA_KEY 108 |
d20f7043 | 1419 | |
f254e52c | 1420 | /* |
d20f7043 CM |
1421 | * extent csums are stored in a separate tree and hold csums for |
1422 | * an entire extent on disk. | |
f254e52c | 1423 | */ |
d20f7043 | 1424 | #define BTRFS_EXTENT_CSUM_KEY 128 |
f254e52c | 1425 | |
1e1d2701 | 1426 | /* |
d4a78947 | 1427 | * root items point to tree roots. They are typically in the root |
1e1d2701 CM |
1428 | * tree used by the super block to find all the other trees |
1429 | */ | |
0660b5af CM |
1430 | #define BTRFS_ROOT_ITEM_KEY 132 |
1431 | ||
1432 | /* | |
1433 | * root backrefs tie subvols and snapshots to the directory entries that | |
1434 | * reference them | |
1435 | */ | |
1436 | #define BTRFS_ROOT_BACKREF_KEY 144 | |
1437 | ||
1438 | /* | |
1439 | * root refs make a fast index for listing all of the snapshots and | |
1440 | * subvolumes referenced by a given root. They point directly to the | |
1441 | * directory item in the root that references the subvol | |
1442 | */ | |
1443 | #define BTRFS_ROOT_REF_KEY 156 | |
1444 | ||
1e1d2701 CM |
1445 | /* |
1446 | * extent items are in the extent map tree. These record which blocks | |
1447 | * are used, and how many references there are to each block | |
1448 | */ | |
0660b5af | 1449 | #define BTRFS_EXTENT_ITEM_KEY 168 |
5d4f98a2 YZ |
1450 | |
1451 | #define BTRFS_TREE_BLOCK_REF_KEY 176 | |
1452 | ||
1453 | #define BTRFS_EXTENT_DATA_REF_KEY 178 | |
1454 | ||
1455 | #define BTRFS_EXTENT_REF_V0_KEY 180 | |
1456 | ||
1457 | #define BTRFS_SHARED_BLOCK_REF_KEY 182 | |
1458 | ||
1459 | #define BTRFS_SHARED_DATA_REF_KEY 184 | |
9078a3e1 CM |
1460 | |
1461 | /* | |
1462 | * block groups give us hints into the extent allocation trees. Which | |
1463 | * blocks are free etc etc | |
1464 | */ | |
0660b5af | 1465 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 192 |
9f5fae2f | 1466 | |
0660b5af CM |
1467 | #define BTRFS_DEV_EXTENT_KEY 204 |
1468 | #define BTRFS_DEV_ITEM_KEY 216 | |
1469 | #define BTRFS_CHUNK_ITEM_KEY 228 | |
0b86a832 | 1470 | |
0940ebf6 ID |
1471 | #define BTRFS_BALANCE_ITEM_KEY 248 |
1472 | ||
1e1d2701 CM |
1473 | /* |
1474 | * string items are for debugging. They just store a short string of | |
1475 | * data in the FS | |
1476 | */ | |
9078a3e1 CM |
1477 | #define BTRFS_STRING_ITEM_KEY 253 |
1478 | ||
0942caa3 DS |
1479 | /* |
1480 | * Flags for mount options. | |
1481 | * | |
1482 | * Note: don't forget to add new options to btrfs_show_options() | |
1483 | */ | |
21ad10cf CM |
1484 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
1485 | #define BTRFS_MOUNT_NODATACOW (1 << 1) | |
1486 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) | |
e18e4809 | 1487 | #define BTRFS_MOUNT_SSD (1 << 3) |
dfe25020 | 1488 | #define BTRFS_MOUNT_DEGRADED (1 << 4) |
c8b97818 | 1489 | #define BTRFS_MOUNT_COMPRESS (1 << 5) |
3a5e1404 | 1490 | #define BTRFS_MOUNT_NOTREELOG (1 << 6) |
dccae999 | 1491 | #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) |
451d7585 | 1492 | #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) |
c289811c | 1493 | #define BTRFS_MOUNT_NOSSD (1 << 9) |
e244a0ae | 1494 | #define BTRFS_MOUNT_DISCARD (1 << 10) |
a555f810 | 1495 | #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) |
0af3d00b | 1496 | #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) |
88c2ba3b | 1497 | #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) |
4260f7c7 | 1498 | #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) |
91435650 | 1499 | #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) |
4cb5300b | 1500 | #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) |
4b9465cb | 1501 | #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) |
af31f5e5 | 1502 | #define BTRFS_MOUNT_RECOVERY (1 << 18) |
9555c6c1 | 1503 | #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) |
c126dea7 CM |
1504 | #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) |
1505 | #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) | |
8c342930 | 1506 | #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) |
b6cda9bc CM |
1507 | |
1508 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) | |
1509 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) | |
1510 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ | |
1511 | BTRFS_MOUNT_##opt) | |
b98b6767 Y |
1512 | /* |
1513 | * Inode flags | |
1514 | */ | |
fdebe2bd Y |
1515 | #define BTRFS_INODE_NODATASUM (1 << 0) |
1516 | #define BTRFS_INODE_NODATACOW (1 << 1) | |
1517 | #define BTRFS_INODE_READONLY (1 << 2) | |
c8b97818 | 1518 | #define BTRFS_INODE_NOCOMPRESS (1 << 3) |
d899e052 | 1519 | #define BTRFS_INODE_PREALLOC (1 << 4) |
6cbff00f CH |
1520 | #define BTRFS_INODE_SYNC (1 << 5) |
1521 | #define BTRFS_INODE_IMMUTABLE (1 << 6) | |
1522 | #define BTRFS_INODE_APPEND (1 << 7) | |
1523 | #define BTRFS_INODE_NODUMP (1 << 8) | |
1524 | #define BTRFS_INODE_NOATIME (1 << 9) | |
1525 | #define BTRFS_INODE_DIRSYNC (1 << 10) | |
75e7cb7f | 1526 | #define BTRFS_INODE_COMPRESS (1 << 11) |
6cbff00f | 1527 | |
08fe4db1 LZ |
1528 | #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) |
1529 | ||
5f39d397 CM |
1530 | /* some macros to generate set/get funcs for the struct fields. This |
1531 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | |
1532 | * one for u8: | |
1533 | */ | |
1534 | #define le8_to_cpu(v) (v) | |
1535 | #define cpu_to_le8(v) (v) | |
1536 | #define __le8 u8 | |
1537 | ||
1538 | #define read_eb_member(eb, ptr, type, member, result) ( \ | |
1539 | read_extent_buffer(eb, (char *)(result), \ | |
1540 | ((unsigned long)(ptr)) + \ | |
1541 | offsetof(type, member), \ | |
1542 | sizeof(((type *)0)->member))) | |
1543 | ||
1544 | #define write_eb_member(eb, ptr, type, member, result) ( \ | |
1545 | write_extent_buffer(eb, (char *)(result), \ | |
1546 | ((unsigned long)(ptr)) + \ | |
1547 | offsetof(type, member), \ | |
1548 | sizeof(((type *)0)->member))) | |
1549 | ||
0f82731f | 1550 | #ifndef BTRFS_SETGET_FUNCS |
5f39d397 | 1551 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
0f82731f CM |
1552 | u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ |
1553 | void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); | |
1554 | #endif | |
5f39d397 CM |
1555 | |
1556 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | |
1557 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | |
1558 | { \ | |
c97c2916 | 1559 | type *p = page_address(eb->first_page); \ |
df68b8a7 | 1560 | u##bits res = le##bits##_to_cpu(p->member); \ |
810191ff | 1561 | return res; \ |
5f39d397 CM |
1562 | } \ |
1563 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
1564 | u##bits val) \ | |
1565 | { \ | |
c97c2916 | 1566 | type *p = page_address(eb->first_page); \ |
df68b8a7 | 1567 | p->member = cpu_to_le##bits(val); \ |
5f39d397 | 1568 | } |
9078a3e1 | 1569 | |
5f39d397 CM |
1570 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
1571 | static inline u##bits btrfs_##name(type *s) \ | |
1572 | { \ | |
1573 | return le##bits##_to_cpu(s->member); \ | |
1574 | } \ | |
1575 | static inline void btrfs_set_##name(type *s, u##bits val) \ | |
1576 | { \ | |
1577 | s->member = cpu_to_le##bits(val); \ | |
1e1d2701 CM |
1578 | } |
1579 | ||
0b86a832 CM |
1580 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
1581 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); | |
1582 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); | |
1583 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); | |
1584 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); | |
c3027eb5 CM |
1585 | BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, |
1586 | start_offset, 64); | |
0b86a832 CM |
1587 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); |
1588 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
1589 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); |
1590 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); | |
1591 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); | |
2b82032c | 1592 | BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); |
0b86a832 | 1593 | |
8a4b83cc CM |
1594 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
1595 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, | |
1596 | total_bytes, 64); | |
1597 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, | |
1598 | bytes_used, 64); | |
1599 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, | |
1600 | io_align, 32); | |
1601 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, | |
1602 | io_width, 32); | |
1603 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, | |
1604 | sector_size, 32); | |
1605 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); | |
e17cade2 CM |
1606 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, |
1607 | dev_group, 32); | |
1608 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, | |
1609 | seek_speed, 8); | |
1610 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, | |
1611 | bandwidth, 8); | |
2b82032c YZ |
1612 | BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, |
1613 | generation, 64); | |
8a4b83cc | 1614 | |
0b86a832 CM |
1615 | static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) |
1616 | { | |
1617 | return (char *)d + offsetof(struct btrfs_dev_item, uuid); | |
1618 | } | |
1619 | ||
2b82032c YZ |
1620 | static inline char *btrfs_device_fsid(struct btrfs_dev_item *d) |
1621 | { | |
1622 | return (char *)d + offsetof(struct btrfs_dev_item, fsid); | |
1623 | } | |
1624 | ||
e17cade2 | 1625 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
0b86a832 CM |
1626 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
1627 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); | |
1628 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); | |
1629 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); | |
1630 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); | |
1631 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); | |
1632 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); | |
321aecc6 | 1633 | BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); |
0b86a832 CM |
1634 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
1635 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); | |
1636 | ||
e17cade2 CM |
1637 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
1638 | { | |
1639 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); | |
1640 | } | |
1641 | ||
1642 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); | |
0b86a832 CM |
1643 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
1644 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, | |
1645 | stripe_len, 64); | |
1646 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, | |
1647 | io_align, 32); | |
1648 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, | |
1649 | io_width, 32); | |
1650 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, | |
1651 | sector_size, 32); | |
1652 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); | |
1653 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, | |
1654 | num_stripes, 16); | |
321aecc6 CM |
1655 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, |
1656 | sub_stripes, 16); | |
0b86a832 CM |
1657 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
1658 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); | |
1659 | ||
1660 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, | |
1661 | int nr) | |
1662 | { | |
1663 | unsigned long offset = (unsigned long)c; | |
1664 | offset += offsetof(struct btrfs_chunk, stripe); | |
1665 | offset += nr * sizeof(struct btrfs_stripe); | |
1666 | return (struct btrfs_stripe *)offset; | |
1667 | } | |
1668 | ||
a443755f CM |
1669 | static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) |
1670 | { | |
1671 | return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); | |
1672 | } | |
1673 | ||
0b86a832 CM |
1674 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
1675 | struct btrfs_chunk *c, int nr) | |
1676 | { | |
1677 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); | |
1678 | } | |
1679 | ||
0b86a832 CM |
1680 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, |
1681 | struct btrfs_chunk *c, int nr) | |
1682 | { | |
1683 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); | |
1684 | } | |
1685 | ||
5f39d397 CM |
1686 | /* struct btrfs_block_group_item */ |
1687 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | |
1688 | used, 64); | |
1689 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | |
1690 | used, 64); | |
0b86a832 CM |
1691 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
1692 | struct btrfs_block_group_item, chunk_objectid, 64); | |
e17cade2 CM |
1693 | |
1694 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, | |
0b86a832 CM |
1695 | struct btrfs_block_group_item, chunk_objectid, 64); |
1696 | BTRFS_SETGET_FUNCS(disk_block_group_flags, | |
1697 | struct btrfs_block_group_item, flags, 64); | |
1698 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, | |
1699 | struct btrfs_block_group_item, flags, 64); | |
1e1d2701 | 1700 | |
3954401f CM |
1701 | /* struct btrfs_inode_ref */ |
1702 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); | |
aec7477b | 1703 | BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); |
3954401f | 1704 | |
5f39d397 CM |
1705 | /* struct btrfs_inode_item */ |
1706 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | |
c3027eb5 | 1707 | BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); |
e02119d5 | 1708 | BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); |
5f39d397 | 1709 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); |
a76a3cd4 | 1710 | BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); |
5f39d397 CM |
1711 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); |
1712 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | |
1713 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | |
1714 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | |
1715 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | |
0b86a832 | 1716 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
f2b636e8 | 1717 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); |
1e1d2701 | 1718 | |
0b86a832 | 1719 | static inline struct btrfs_timespec * |
5f39d397 | 1720 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1721 | { |
5f39d397 CM |
1722 | unsigned long ptr = (unsigned long)inode_item; |
1723 | ptr += offsetof(struct btrfs_inode_item, atime); | |
0b86a832 | 1724 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1725 | } |
1726 | ||
0b86a832 | 1727 | static inline struct btrfs_timespec * |
5f39d397 | 1728 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1729 | { |
5f39d397 CM |
1730 | unsigned long ptr = (unsigned long)inode_item; |
1731 | ptr += offsetof(struct btrfs_inode_item, mtime); | |
0b86a832 | 1732 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1733 | } |
1734 | ||
0b86a832 | 1735 | static inline struct btrfs_timespec * |
5f39d397 | 1736 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
1e1d2701 | 1737 | { |
5f39d397 CM |
1738 | unsigned long ptr = (unsigned long)inode_item; |
1739 | ptr += offsetof(struct btrfs_inode_item, ctime); | |
0b86a832 | 1740 | return (struct btrfs_timespec *)ptr; |
1e1d2701 CM |
1741 | } |
1742 | ||
0b86a832 CM |
1743 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
1744 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); | |
e20d96d6 | 1745 | |
0b86a832 | 1746 | /* struct btrfs_dev_extent */ |
e17cade2 CM |
1747 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
1748 | chunk_tree, 64); | |
1749 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, | |
1750 | chunk_objectid, 64); | |
1751 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, | |
1752 | chunk_offset, 64); | |
0b86a832 CM |
1753 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
1754 | ||
e17cade2 CM |
1755 | static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
1756 | { | |
1757 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); | |
1758 | return (u8 *)((unsigned long)dev + ptr); | |
1759 | } | |
1760 | ||
5d4f98a2 YZ |
1761 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); |
1762 | BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, | |
1763 | generation, 64); | |
1764 | BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); | |
74493f7a | 1765 | |
5d4f98a2 YZ |
1766 | BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); |
1767 | ||
1768 | ||
1769 | BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); | |
1770 | ||
1771 | static inline void btrfs_tree_block_key(struct extent_buffer *eb, | |
1772 | struct btrfs_tree_block_info *item, | |
1773 | struct btrfs_disk_key *key) | |
1774 | { | |
1775 | read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
1776 | } | |
1777 | ||
1778 | static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, | |
1779 | struct btrfs_tree_block_info *item, | |
1780 | struct btrfs_disk_key *key) | |
1781 | { | |
1782 | write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
1783 | } | |
e20d96d6 | 1784 | |
5d4f98a2 YZ |
1785 | BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, |
1786 | root, 64); | |
1787 | BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, | |
1788 | objectid, 64); | |
1789 | BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, | |
1790 | offset, 64); | |
1791 | BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, | |
1792 | count, 32); | |
1793 | ||
1794 | BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, | |
1795 | count, 32); | |
1796 | ||
1797 | BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, | |
1798 | type, 8); | |
1799 | BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, | |
1800 | offset, 64); | |
1801 | ||
1802 | static inline u32 btrfs_extent_inline_ref_size(int type) | |
1803 | { | |
1804 | if (type == BTRFS_TREE_BLOCK_REF_KEY || | |
1805 | type == BTRFS_SHARED_BLOCK_REF_KEY) | |
1806 | return sizeof(struct btrfs_extent_inline_ref); | |
1807 | if (type == BTRFS_SHARED_DATA_REF_KEY) | |
1808 | return sizeof(struct btrfs_shared_data_ref) + | |
1809 | sizeof(struct btrfs_extent_inline_ref); | |
1810 | if (type == BTRFS_EXTENT_DATA_REF_KEY) | |
1811 | return sizeof(struct btrfs_extent_data_ref) + | |
1812 | offsetof(struct btrfs_extent_inline_ref, offset); | |
1813 | BUG(); | |
1814 | return 0; | |
1815 | } | |
1816 | ||
1817 | BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); | |
1818 | BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, | |
1819 | generation, 64); | |
1820 | BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); | |
1821 | BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); | |
e20d96d6 | 1822 | |
5f39d397 CM |
1823 | /* struct btrfs_node */ |
1824 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | |
74493f7a | 1825 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
e20d96d6 | 1826 | |
5f39d397 | 1827 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
cf27e1ee | 1828 | { |
5f39d397 CM |
1829 | unsigned long ptr; |
1830 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1831 | sizeof(struct btrfs_key_ptr) * nr; | |
1832 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | |
cf27e1ee CM |
1833 | } |
1834 | ||
5f39d397 CM |
1835 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
1836 | int nr, u64 val) | |
cf27e1ee | 1837 | { |
5f39d397 CM |
1838 | unsigned long ptr; |
1839 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1840 | sizeof(struct btrfs_key_ptr) * nr; | |
1841 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | |
cf27e1ee CM |
1842 | } |
1843 | ||
74493f7a CM |
1844 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
1845 | { | |
1846 | unsigned long ptr; | |
1847 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1848 | sizeof(struct btrfs_key_ptr) * nr; | |
1849 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); | |
1850 | } | |
1851 | ||
1852 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, | |
1853 | int nr, u64 val) | |
1854 | { | |
1855 | unsigned long ptr; | |
1856 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1857 | sizeof(struct btrfs_key_ptr) * nr; | |
1858 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); | |
1859 | } | |
1860 | ||
810191ff | 1861 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
4d775673 | 1862 | { |
5f39d397 CM |
1863 | return offsetof(struct btrfs_node, ptrs) + |
1864 | sizeof(struct btrfs_key_ptr) * nr; | |
4d775673 CM |
1865 | } |
1866 | ||
e644d021 CM |
1867 | void btrfs_node_key(struct extent_buffer *eb, |
1868 | struct btrfs_disk_key *disk_key, int nr); | |
1869 | ||
5f39d397 CM |
1870 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
1871 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f8a0c | 1872 | { |
5f39d397 CM |
1873 | unsigned long ptr; |
1874 | ptr = btrfs_node_key_ptr_offset(nr); | |
1875 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
1876 | struct btrfs_key_ptr, key, disk_key); | |
1d4f8a0c CM |
1877 | } |
1878 | ||
5f39d397 CM |
1879 | /* struct btrfs_item */ |
1880 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | |
1881 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | |
4d775673 | 1882 | |
5f39d397 | 1883 | static inline unsigned long btrfs_item_nr_offset(int nr) |
1d4f8a0c | 1884 | { |
5f39d397 CM |
1885 | return offsetof(struct btrfs_leaf, items) + |
1886 | sizeof(struct btrfs_item) * nr; | |
1d4f8a0c CM |
1887 | } |
1888 | ||
5f39d397 CM |
1889 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
1890 | int nr) | |
0783fcfc | 1891 | { |
5f39d397 | 1892 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
0783fcfc CM |
1893 | } |
1894 | ||
5f39d397 CM |
1895 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
1896 | struct btrfs_item *item) | |
0783fcfc | 1897 | { |
5f39d397 | 1898 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
0783fcfc CM |
1899 | } |
1900 | ||
5f39d397 | 1901 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1902 | { |
5f39d397 | 1903 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1904 | } |
1905 | ||
5f39d397 | 1906 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1907 | { |
5f39d397 | 1908 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1909 | } |
1910 | ||
5f39d397 | 1911 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
0783fcfc | 1912 | { |
5f39d397 | 1913 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
0783fcfc CM |
1914 | } |
1915 | ||
5f39d397 CM |
1916 | static inline void btrfs_item_key(struct extent_buffer *eb, |
1917 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 1918 | { |
5f39d397 CM |
1919 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
1920 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
1921 | } |
1922 | ||
5f39d397 CM |
1923 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
1924 | struct btrfs_disk_key *disk_key, int nr) | |
1d4f6404 | 1925 | { |
5f39d397 CM |
1926 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
1927 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1d4f6404 CM |
1928 | } |
1929 | ||
e02119d5 CM |
1930 | BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); |
1931 | ||
0660b5af CM |
1932 | /* |
1933 | * struct btrfs_root_ref | |
1934 | */ | |
1935 | BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); | |
1936 | BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); | |
1937 | BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); | |
1938 | ||
5f39d397 | 1939 | /* struct btrfs_dir_item */ |
5103e947 | 1940 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
5f39d397 CM |
1941 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
1942 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | |
e02119d5 | 1943 | BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); |
1d4f6404 | 1944 | |
5f39d397 CM |
1945 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
1946 | struct btrfs_dir_item *item, | |
1947 | struct btrfs_disk_key *key) | |
1d4f6404 | 1948 | { |
5f39d397 | 1949 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
1d4f6404 CM |
1950 | } |
1951 | ||
5f39d397 CM |
1952 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
1953 | struct btrfs_dir_item *item, | |
1954 | struct btrfs_disk_key *key) | |
a8a2ee0c | 1955 | { |
5f39d397 | 1956 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
a8a2ee0c CM |
1957 | } |
1958 | ||
0af3d00b JB |
1959 | BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, |
1960 | num_entries, 64); | |
1961 | BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, | |
1962 | num_bitmaps, 64); | |
1963 | BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, | |
1964 | generation, 64); | |
1965 | ||
1966 | static inline void btrfs_free_space_key(struct extent_buffer *eb, | |
1967 | struct btrfs_free_space_header *h, | |
1968 | struct btrfs_disk_key *key) | |
1969 | { | |
1970 | read_eb_member(eb, h, struct btrfs_free_space_header, location, key); | |
1971 | } | |
1972 | ||
1973 | static inline void btrfs_set_free_space_key(struct extent_buffer *eb, | |
1974 | struct btrfs_free_space_header *h, | |
1975 | struct btrfs_disk_key *key) | |
1976 | { | |
1977 | write_eb_member(eb, h, struct btrfs_free_space_header, location, key); | |
1978 | } | |
1979 | ||
5f39d397 CM |
1980 | /* struct btrfs_disk_key */ |
1981 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | |
1982 | objectid, 64); | |
1983 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | |
1984 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | |
1d4f6404 | 1985 | |
e2fa7227 CM |
1986 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
1987 | struct btrfs_disk_key *disk) | |
1988 | { | |
1989 | cpu->offset = le64_to_cpu(disk->offset); | |
5f39d397 | 1990 | cpu->type = disk->type; |
e2fa7227 CM |
1991 | cpu->objectid = le64_to_cpu(disk->objectid); |
1992 | } | |
1993 | ||
1994 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
1995 | struct btrfs_key *cpu) | |
1996 | { | |
1997 | disk->offset = cpu_to_le64(cpu->offset); | |
5f39d397 | 1998 | disk->type = cpu->type; |
e2fa7227 CM |
1999 | disk->objectid = cpu_to_le64(cpu->objectid); |
2000 | } | |
2001 | ||
5f39d397 CM |
2002 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
2003 | struct btrfs_key *key, int nr) | |
7f5c1516 | 2004 | { |
5f39d397 CM |
2005 | struct btrfs_disk_key disk_key; |
2006 | btrfs_node_key(eb, &disk_key, nr); | |
2007 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
2008 | } |
2009 | ||
5f39d397 CM |
2010 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
2011 | struct btrfs_key *key, int nr) | |
7f5c1516 | 2012 | { |
5f39d397 CM |
2013 | struct btrfs_disk_key disk_key; |
2014 | btrfs_item_key(eb, &disk_key, nr); | |
2015 | btrfs_disk_key_to_cpu(key, &disk_key); | |
7f5c1516 CM |
2016 | } |
2017 | ||
5f39d397 CM |
2018 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
2019 | struct btrfs_dir_item *item, | |
2020 | struct btrfs_key *key) | |
4d775673 | 2021 | { |
5f39d397 CM |
2022 | struct btrfs_disk_key disk_key; |
2023 | btrfs_dir_item_key(eb, item, &disk_key); | |
2024 | btrfs_disk_key_to_cpu(key, &disk_key); | |
4d775673 CM |
2025 | } |
2026 | ||
58176a96 | 2027 | |
5f39d397 | 2028 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
3768f368 | 2029 | { |
5f39d397 | 2030 | return key->type; |
3768f368 CM |
2031 | } |
2032 | ||
5f39d397 | 2033 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
3768f368 | 2034 | { |
5f39d397 | 2035 | key->type = val; |
3768f368 CM |
2036 | } |
2037 | ||
5f39d397 | 2038 | /* struct btrfs_header */ |
db94535d | 2039 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
5f39d397 CM |
2040 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
2041 | generation, 64); | |
2042 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | |
2043 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | |
63b10fc4 | 2044 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
5f39d397 | 2045 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
0f7d52f4 | 2046 | |
63b10fc4 CM |
2047 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) |
2048 | { | |
2049 | return (btrfs_header_flags(eb) & flag) == flag; | |
2050 | } | |
2051 | ||
2052 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) | |
2053 | { | |
2054 | u64 flags = btrfs_header_flags(eb); | |
2055 | btrfs_set_header_flags(eb, flags | flag); | |
2056 | return (flags & flag) == flag; | |
2057 | } | |
2058 | ||
2059 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) | |
2060 | { | |
2061 | u64 flags = btrfs_header_flags(eb); | |
2062 | btrfs_set_header_flags(eb, flags & ~flag); | |
2063 | return (flags & flag) == flag; | |
2064 | } | |
2065 | ||
5d4f98a2 YZ |
2066 | static inline int btrfs_header_backref_rev(struct extent_buffer *eb) |
2067 | { | |
2068 | u64 flags = btrfs_header_flags(eb); | |
2069 | return flags >> BTRFS_BACKREF_REV_SHIFT; | |
2070 | } | |
2071 | ||
2072 | static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, | |
2073 | int rev) | |
2074 | { | |
2075 | u64 flags = btrfs_header_flags(eb); | |
2076 | flags &= ~BTRFS_BACKREF_REV_MASK; | |
2077 | flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; | |
2078 | btrfs_set_header_flags(eb, flags); | |
2079 | } | |
2080 | ||
5f39d397 | 2081 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
0f7d52f4 | 2082 | { |
5f39d397 CM |
2083 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
2084 | return (u8 *)ptr; | |
0f7d52f4 CM |
2085 | } |
2086 | ||
e17cade2 CM |
2087 | static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) |
2088 | { | |
2089 | unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid); | |
2090 | return (u8 *)ptr; | |
2091 | } | |
2092 | ||
5f39d397 | 2093 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
3768f368 | 2094 | { |
d397712b | 2095 | return btrfs_header_level(eb) == 0; |
3768f368 CM |
2096 | } |
2097 | ||
5f39d397 | 2098 | /* struct btrfs_root_item */ |
84234f3a YZ |
2099 | BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, |
2100 | generation, 64); | |
5f39d397 | 2101 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); |
db94535d CM |
2102 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
2103 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); | |
3768f368 | 2104 | |
84234f3a YZ |
2105 | BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, |
2106 | generation, 64); | |
db94535d CM |
2107 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
2108 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); | |
5f39d397 CM |
2109 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
2110 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | |
f2b636e8 | 2111 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); |
db94535d CM |
2112 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
2113 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); | |
80ff3856 YZ |
2114 | BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, |
2115 | last_snapshot, 64); | |
123abc88 | 2116 | |
b83cc969 LZ |
2117 | static inline bool btrfs_root_readonly(struct btrfs_root *root) |
2118 | { | |
2119 | return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY; | |
2120 | } | |
2121 | ||
af31f5e5 CM |
2122 | /* struct btrfs_root_backup */ |
2123 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, | |
2124 | tree_root, 64); | |
2125 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, | |
2126 | tree_root_gen, 64); | |
2127 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, | |
2128 | tree_root_level, 8); | |
2129 | ||
2130 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, | |
2131 | chunk_root, 64); | |
2132 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, | |
2133 | chunk_root_gen, 64); | |
2134 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, | |
2135 | chunk_root_level, 8); | |
2136 | ||
2137 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, | |
2138 | extent_root, 64); | |
2139 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, | |
2140 | extent_root_gen, 64); | |
2141 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, | |
2142 | extent_root_level, 8); | |
2143 | ||
2144 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, | |
2145 | fs_root, 64); | |
2146 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, | |
2147 | fs_root_gen, 64); | |
2148 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, | |
2149 | fs_root_level, 8); | |
2150 | ||
2151 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, | |
2152 | dev_root, 64); | |
2153 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, | |
2154 | dev_root_gen, 64); | |
2155 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, | |
2156 | dev_root_level, 8); | |
2157 | ||
2158 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, | |
2159 | csum_root, 64); | |
2160 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, | |
2161 | csum_root_gen, 64); | |
2162 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, | |
2163 | csum_root_level, 8); | |
2164 | BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, | |
2165 | total_bytes, 64); | |
2166 | BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, | |
2167 | bytes_used, 64); | |
2168 | BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, | |
2169 | num_devices, 64); | |
2170 | ||
0940ebf6 ID |
2171 | /* struct btrfs_balance_item */ |
2172 | BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); | |
607d432d | 2173 | |
0940ebf6 ID |
2174 | static inline void btrfs_balance_data(struct extent_buffer *eb, |
2175 | struct btrfs_balance_item *bi, | |
2176 | struct btrfs_disk_balance_args *ba) | |
2177 | { | |
2178 | read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); | |
2179 | } | |
2180 | ||
2181 | static inline void btrfs_set_balance_data(struct extent_buffer *eb, | |
2182 | struct btrfs_balance_item *bi, | |
2183 | struct btrfs_disk_balance_args *ba) | |
2184 | { | |
2185 | write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); | |
2186 | } | |
2187 | ||
2188 | static inline void btrfs_balance_meta(struct extent_buffer *eb, | |
2189 | struct btrfs_balance_item *bi, | |
2190 | struct btrfs_disk_balance_args *ba) | |
2191 | { | |
2192 | read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); | |
2193 | } | |
2194 | ||
2195 | static inline void btrfs_set_balance_meta(struct extent_buffer *eb, | |
2196 | struct btrfs_balance_item *bi, | |
2197 | struct btrfs_disk_balance_args *ba) | |
2198 | { | |
2199 | write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); | |
2200 | } | |
2201 | ||
2202 | static inline void btrfs_balance_sys(struct extent_buffer *eb, | |
2203 | struct btrfs_balance_item *bi, | |
2204 | struct btrfs_disk_balance_args *ba) | |
2205 | { | |
2206 | read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); | |
2207 | } | |
2208 | ||
2209 | static inline void btrfs_set_balance_sys(struct extent_buffer *eb, | |
2210 | struct btrfs_balance_item *bi, | |
2211 | struct btrfs_disk_balance_args *ba) | |
2212 | { | |
2213 | write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); | |
2214 | } | |
2215 | ||
2216 | static inline void | |
2217 | btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, | |
2218 | struct btrfs_disk_balance_args *disk) | |
2219 | { | |
2220 | memset(cpu, 0, sizeof(*cpu)); | |
2221 | ||
2222 | cpu->profiles = le64_to_cpu(disk->profiles); | |
2223 | cpu->usage = le64_to_cpu(disk->usage); | |
2224 | cpu->devid = le64_to_cpu(disk->devid); | |
2225 | cpu->pstart = le64_to_cpu(disk->pstart); | |
2226 | cpu->pend = le64_to_cpu(disk->pend); | |
2227 | cpu->vstart = le64_to_cpu(disk->vstart); | |
2228 | cpu->vend = le64_to_cpu(disk->vend); | |
2229 | cpu->target = le64_to_cpu(disk->target); | |
2230 | cpu->flags = le64_to_cpu(disk->flags); | |
2231 | } | |
2232 | ||
2233 | static inline void | |
2234 | btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, | |
2235 | struct btrfs_balance_args *cpu) | |
2236 | { | |
2237 | memset(disk, 0, sizeof(*disk)); | |
2238 | ||
2239 | disk->profiles = cpu_to_le64(cpu->profiles); | |
2240 | disk->usage = cpu_to_le64(cpu->usage); | |
2241 | disk->devid = cpu_to_le64(cpu->devid); | |
2242 | disk->pstart = cpu_to_le64(cpu->pstart); | |
2243 | disk->pend = cpu_to_le64(cpu->pend); | |
2244 | disk->vstart = cpu_to_le64(cpu->vstart); | |
2245 | disk->vend = cpu_to_le64(cpu->vend); | |
2246 | disk->target = cpu_to_le64(cpu->target); | |
2247 | disk->flags = cpu_to_le64(cpu->flags); | |
2248 | } | |
2249 | ||
2250 | /* struct btrfs_super_block */ | |
db94535d | 2251 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
a061fc8d | 2252 | BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); |
5f39d397 CM |
2253 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
2254 | generation, 64); | |
2255 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | |
0b86a832 CM |
2256 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
2257 | struct btrfs_super_block, sys_chunk_array_size, 32); | |
84234f3a YZ |
2258 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, |
2259 | struct btrfs_super_block, chunk_root_generation, 64); | |
db94535d CM |
2260 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
2261 | root_level, 8); | |
0b86a832 CM |
2262 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
2263 | chunk_root, 64); | |
2264 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, | |
e02119d5 CM |
2265 | chunk_root_level, 8); |
2266 | BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, | |
2267 | log_root, 64); | |
c3027eb5 CM |
2268 | BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, |
2269 | log_root_transid, 64); | |
e02119d5 CM |
2270 | BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, |
2271 | log_root_level, 8); | |
db94535d CM |
2272 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
2273 | total_bytes, 64); | |
2274 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, | |
2275 | bytes_used, 64); | |
5f39d397 CM |
2276 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
2277 | sectorsize, 32); | |
2278 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | |
2279 | nodesize, 32); | |
2280 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, | |
2281 | leafsize, 32); | |
87ee04eb CM |
2282 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
2283 | stripesize, 32); | |
5f39d397 CM |
2284 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
2285 | root_dir_objectid, 64); | |
8a4b83cc CM |
2286 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
2287 | num_devices, 64); | |
f2b636e8 JB |
2288 | BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, |
2289 | compat_flags, 64); | |
2290 | BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, | |
12534832 | 2291 | compat_ro_flags, 64); |
f2b636e8 JB |
2292 | BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, |
2293 | incompat_flags, 64); | |
607d432d JB |
2294 | BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, |
2295 | csum_type, 16); | |
0af3d00b JB |
2296 | BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, |
2297 | cache_generation, 64); | |
607d432d JB |
2298 | |
2299 | static inline int btrfs_super_csum_size(struct btrfs_super_block *s) | |
2300 | { | |
2301 | int t = btrfs_super_csum_type(s); | |
2302 | BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes)); | |
2303 | return btrfs_csum_sizes[t]; | |
2304 | } | |
2e635a27 | 2305 | |
5f39d397 | 2306 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
2e635a27 | 2307 | { |
5f39d397 | 2308 | return offsetof(struct btrfs_leaf, items); |
2e635a27 CM |
2309 | } |
2310 | ||
5f39d397 CM |
2311 | /* struct btrfs_file_extent_item */ |
2312 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | |
9f5fae2f | 2313 | |
d397712b CM |
2314 | static inline unsigned long |
2315 | btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) | |
236454df | 2316 | { |
5f39d397 | 2317 | unsigned long offset = (unsigned long)e; |
db94535d | 2318 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
5f39d397 | 2319 | return offset; |
236454df CM |
2320 | } |
2321 | ||
2322 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
2323 | { | |
db94535d | 2324 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
9f5fae2f CM |
2325 | } |
2326 | ||
db94535d CM |
2327 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
2328 | disk_bytenr, 64); | |
5f39d397 CM |
2329 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
2330 | generation, 64); | |
db94535d CM |
2331 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
2332 | disk_num_bytes, 64); | |
5f39d397 CM |
2333 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
2334 | offset, 64); | |
db94535d CM |
2335 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
2336 | num_bytes, 64); | |
c8b97818 CM |
2337 | BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, |
2338 | ram_bytes, 64); | |
2339 | BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, | |
2340 | compression, 8); | |
2341 | BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, | |
2342 | encryption, 8); | |
2343 | BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, | |
2344 | other_encoding, 16); | |
2345 | ||
2346 | /* this returns the number of file bytes represented by the inline item. | |
2347 | * If an item is compressed, this is the uncompressed size | |
2348 | */ | |
2349 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, | |
2350 | struct btrfs_file_extent_item *e) | |
2351 | { | |
2352 | return btrfs_file_extent_ram_bytes(eb, e); | |
2353 | } | |
2354 | ||
2355 | /* | |
2356 | * this returns the number of bytes used by the item on disk, minus the | |
2357 | * size of any extent headers. If a file is compressed on disk, this is | |
2358 | * the compressed size | |
2359 | */ | |
2360 | static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, | |
2361 | struct btrfs_item *e) | |
2362 | { | |
2363 | unsigned long offset; | |
2364 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); | |
2365 | return btrfs_item_size(eb, e) - offset; | |
2366 | } | |
9f5fae2f | 2367 | |
815745cf | 2368 | static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) |
e20d96d6 CM |
2369 | { |
2370 | return sb->s_fs_info; | |
2371 | } | |
2372 | ||
d397712b CM |
2373 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) |
2374 | { | |
db94535d CM |
2375 | if (level == 0) |
2376 | return root->leafsize; | |
2377 | return root->nodesize; | |
2378 | } | |
2379 | ||
4beb1b8b CM |
2380 | /* helper function to cast into the data area of the leaf. */ |
2381 | #define btrfs_item_ptr(leaf, slot, type) \ | |
123abc88 | 2382 | ((type *)(btrfs_leaf_data(leaf) + \ |
5f39d397 CM |
2383 | btrfs_item_offset_nr(leaf, slot))) |
2384 | ||
2385 | #define btrfs_item_ptr_offset(leaf, slot) \ | |
2386 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | |
2387 | btrfs_item_offset_nr(leaf, slot))) | |
4beb1b8b | 2388 | |
2b1f55b0 CM |
2389 | static inline struct dentry *fdentry(struct file *file) |
2390 | { | |
6da6abae | 2391 | return file->f_path.dentry; |
6da6abae CM |
2392 | } |
2393 | ||
67377734 JB |
2394 | static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) |
2395 | { | |
2396 | return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && | |
2397 | (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); | |
2398 | } | |
2399 | ||
3b16a4e3 JB |
2400 | static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) |
2401 | { | |
2402 | return mapping_gfp_mask(mapping) & ~__GFP_FS; | |
2403 | } | |
2404 | ||
b18c6685 | 2405 | /* extent-tree.c */ |
16cdcec7 | 2406 | static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root, |
9e0baf60 | 2407 | unsigned num_items) |
16cdcec7 MX |
2408 | { |
2409 | return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) * | |
2410 | 3 * num_items; | |
07127184 JB |
2411 | } |
2412 | ||
2413 | /* | |
2414 | * Doing a truncate won't result in new nodes or leaves, just what we need for | |
2415 | * COW. | |
2416 | */ | |
2417 | static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root, | |
2418 | unsigned num_items) | |
2419 | { | |
2420 | return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) * | |
2421 | num_items; | |
16cdcec7 MX |
2422 | } |
2423 | ||
fa9c0d79 | 2424 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
56bec294 CM |
2425 | int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, |
2426 | struct btrfs_root *root, unsigned long count); | |
31840ae1 | 2427 | int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len); |
a22285a6 YZ |
2428 | int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, |
2429 | struct btrfs_root *root, u64 bytenr, | |
2430 | u64 num_bytes, u64 *refs, u64 *flags); | |
11833d66 YZ |
2431 | int btrfs_pin_extent(struct btrfs_root *root, |
2432 | u64 bytenr, u64 num, int reserved); | |
e688b725 CM |
2433 | int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, |
2434 | struct btrfs_root *root, | |
2435 | u64 bytenr, u64 num_bytes); | |
80ff3856 | 2436 | int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, |
5d4f98a2 YZ |
2437 | struct btrfs_root *root, |
2438 | u64 objectid, u64 offset, u64 bytenr); | |
d397712b CM |
2439 | struct btrfs_block_group_cache *btrfs_lookup_block_group( |
2440 | struct btrfs_fs_info *info, | |
2441 | u64 bytenr); | |
5d4f98a2 | 2442 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
d2fb3437 YZ |
2443 | u64 btrfs_find_block_group(struct btrfs_root *root, |
2444 | u64 search_start, u64 search_hint, int owner); | |
5f39d397 | 2445 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
5d4f98a2 YZ |
2446 | struct btrfs_root *root, u32 blocksize, |
2447 | u64 parent, u64 root_objectid, | |
2448 | struct btrfs_disk_key *key, int level, | |
66d7e7f0 | 2449 | u64 hint, u64 empty_size, int for_cow); |
f0486c68 YZ |
2450 | void btrfs_free_tree_block(struct btrfs_trans_handle *trans, |
2451 | struct btrfs_root *root, | |
2452 | struct extent_buffer *buf, | |
66d7e7f0 | 2453 | u64 parent, int last_ref, int for_cow); |
65b51a00 CM |
2454 | struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans, |
2455 | struct btrfs_root *root, | |
4008c04a CM |
2456 | u64 bytenr, u32 blocksize, |
2457 | int level); | |
5d4f98a2 YZ |
2458 | int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, |
2459 | struct btrfs_root *root, | |
2460 | u64 root_objectid, u64 owner, | |
2461 | u64 offset, struct btrfs_key *ins); | |
2462 | int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, | |
2463 | struct btrfs_root *root, | |
2464 | u64 root_objectid, u64 owner, u64 offset, | |
2465 | struct btrfs_key *ins); | |
e6dcd2dc CM |
2466 | int btrfs_reserve_extent(struct btrfs_trans_handle *trans, |
2467 | struct btrfs_root *root, | |
2468 | u64 num_bytes, u64 min_alloc_size, | |
2469 | u64 empty_size, u64 hint_byte, | |
2470 | u64 search_end, struct btrfs_key *ins, | |
2471 | u64 data); | |
e089f05c | 2472 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
66d7e7f0 | 2473 | struct extent_buffer *buf, int full_backref, int for_cow); |
5d4f98a2 | 2474 | int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
66d7e7f0 | 2475 | struct extent_buffer *buf, int full_backref, int for_cow); |
5d4f98a2 YZ |
2476 | int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, |
2477 | struct btrfs_root *root, | |
2478 | u64 bytenr, u64 num_bytes, u64 flags, | |
2479 | int is_data); | |
31840ae1 ZY |
2480 | int btrfs_free_extent(struct btrfs_trans_handle *trans, |
2481 | struct btrfs_root *root, | |
66d7e7f0 AJ |
2482 | u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, |
2483 | u64 owner, u64 offset, int for_cow); | |
5d4f98a2 | 2484 | |
65b51a00 | 2485 | int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len); |
e688b725 CM |
2486 | int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root, |
2487 | u64 start, u64 len); | |
143bede5 JM |
2488 | void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, |
2489 | struct btrfs_root *root); | |
ccd467d6 | 2490 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
11833d66 | 2491 | struct btrfs_root *root); |
b18c6685 | 2492 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
31840ae1 ZY |
2493 | struct btrfs_root *root, |
2494 | u64 bytenr, u64 num_bytes, u64 parent, | |
66d7e7f0 | 2495 | u64 root_objectid, u64 owner, u64 offset, int for_cow); |
5d4f98a2 | 2496 | |
9078a3e1 CM |
2497 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
2498 | struct btrfs_root *root); | |
d2fb3437 | 2499 | int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr); |
9078a3e1 CM |
2500 | int btrfs_free_block_groups(struct btrfs_fs_info *info); |
2501 | int btrfs_read_block_groups(struct btrfs_root *root); | |
ba1bf481 | 2502 | int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr); |
0b86a832 CM |
2503 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
2504 | struct btrfs_root *root, u64 bytes_used, | |
e17cade2 | 2505 | u64 type, u64 chunk_objectid, u64 chunk_offset, |
0b86a832 | 2506 | u64 size); |
1a40e23b ZY |
2507 | int btrfs_remove_block_group(struct btrfs_trans_handle *trans, |
2508 | struct btrfs_root *root, u64 group_start); | |
2b82032c | 2509 | u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags); |
6d07bcec | 2510 | u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data); |
6a63209f | 2511 | void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde); |
4184ea7f | 2512 | void btrfs_clear_space_info_full(struct btrfs_fs_info *info); |
0ca1f7ce YZ |
2513 | int btrfs_check_data_free_space(struct inode *inode, u64 bytes); |
2514 | void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes); | |
a22285a6 YZ |
2515 | void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, |
2516 | struct btrfs_root *root); | |
d68fc57b YZ |
2517 | int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, |
2518 | struct inode *inode); | |
2519 | void btrfs_orphan_release_metadata(struct inode *inode); | |
a22285a6 YZ |
2520 | int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans, |
2521 | struct btrfs_pending_snapshot *pending); | |
0ca1f7ce YZ |
2522 | int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes); |
2523 | void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes); | |
2524 | int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes); | |
2525 | void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes); | |
f0486c68 YZ |
2526 | void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv); |
2527 | struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root); | |
2528 | void btrfs_free_block_rsv(struct btrfs_root *root, | |
2529 | struct btrfs_block_rsv *rsv); | |
4a92b1b8 | 2530 | int btrfs_block_rsv_add(struct btrfs_root *root, |
f0486c68 | 2531 | struct btrfs_block_rsv *block_rsv, |
8bb8ab2e | 2532 | u64 num_bytes); |
c06a0e12 JB |
2533 | int btrfs_block_rsv_add_noflush(struct btrfs_root *root, |
2534 | struct btrfs_block_rsv *block_rsv, | |
2535 | u64 num_bytes); | |
4a92b1b8 | 2536 | int btrfs_block_rsv_check(struct btrfs_root *root, |
36ba022a JB |
2537 | struct btrfs_block_rsv *block_rsv, int min_factor); |
2538 | int btrfs_block_rsv_refill(struct btrfs_root *root, | |
f0486c68 | 2539 | struct btrfs_block_rsv *block_rsv, |
36ba022a | 2540 | u64 min_reserved); |
aa38a711 MX |
2541 | int btrfs_block_rsv_refill_noflush(struct btrfs_root *root, |
2542 | struct btrfs_block_rsv *block_rsv, | |
2543 | u64 min_reserved); | |
f0486c68 YZ |
2544 | int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, |
2545 | struct btrfs_block_rsv *dst_rsv, | |
2546 | u64 num_bytes); | |
2547 | void btrfs_block_rsv_release(struct btrfs_root *root, | |
2548 | struct btrfs_block_rsv *block_rsv, | |
2549 | u64 num_bytes); | |
2550 | int btrfs_set_block_group_ro(struct btrfs_root *root, | |
2551 | struct btrfs_block_group_cache *cache); | |
143bede5 JM |
2552 | void btrfs_set_block_group_rw(struct btrfs_root *root, |
2553 | struct btrfs_block_group_cache *cache); | |
0af3d00b | 2554 | void btrfs_put_block_group_cache(struct btrfs_fs_info *info); |
6d07bcec | 2555 | u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); |
acce952b | 2556 | int btrfs_error_unpin_extent_range(struct btrfs_root *root, |
2557 | u64 start, u64 end); | |
2558 | int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr, | |
5378e607 | 2559 | u64 num_bytes, u64 *actual_bytes); |
c87f08ca CM |
2560 | int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, |
2561 | struct btrfs_root *root, u64 type); | |
f7039b1d | 2562 | int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range); |
acce952b | 2563 | |
c59021f8 | 2564 | int btrfs_init_space_info(struct btrfs_fs_info *fs_info); |
dee26a9f | 2565 | /* ctree.c */ |
5d4f98a2 YZ |
2566 | int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, |
2567 | int level, int *slot); | |
2568 | int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); | |
0b86a832 CM |
2569 | int btrfs_previous_item(struct btrfs_root *root, |
2570 | struct btrfs_path *path, u64 min_objectid, | |
2571 | int type); | |
143bede5 JM |
2572 | void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, |
2573 | struct btrfs_root *root, struct btrfs_path *path, | |
2574 | struct btrfs_key *new_key); | |
925baedd CM |
2575 | struct extent_buffer *btrfs_root_node(struct btrfs_root *root); |
2576 | struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); | |
e7a84565 | 2577 | int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, |
3f157a2f CM |
2578 | struct btrfs_key *key, int lowest_level, |
2579 | int cache_only, u64 min_trans); | |
2580 | int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, | |
e02119d5 | 2581 | struct btrfs_key *max_key, |
3f157a2f CM |
2582 | struct btrfs_path *path, int cache_only, |
2583 | u64 min_trans); | |
5f39d397 CM |
2584 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
2585 | struct btrfs_root *root, struct extent_buffer *buf, | |
2586 | struct extent_buffer *parent, int parent_slot, | |
9fa8cfe7 | 2587 | struct extent_buffer **cow_ret); |
be20aa9d CM |
2588 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
2589 | struct btrfs_root *root, | |
2590 | struct extent_buffer *buf, | |
2591 | struct extent_buffer **cow_ret, u64 new_root_objectid); | |
5d4f98a2 YZ |
2592 | int btrfs_block_can_be_shared(struct btrfs_root *root, |
2593 | struct extent_buffer *buf); | |
143bede5 JM |
2594 | void btrfs_extend_item(struct btrfs_trans_handle *trans, |
2595 | struct btrfs_root *root, struct btrfs_path *path, | |
2596 | u32 data_size); | |
2597 | void btrfs_truncate_item(struct btrfs_trans_handle *trans, | |
2598 | struct btrfs_root *root, | |
2599 | struct btrfs_path *path, | |
2600 | u32 new_size, int from_end); | |
459931ec CM |
2601 | int btrfs_split_item(struct btrfs_trans_handle *trans, |
2602 | struct btrfs_root *root, | |
2603 | struct btrfs_path *path, | |
2604 | struct btrfs_key *new_key, | |
2605 | unsigned long split_offset); | |
ad48fd75 YZ |
2606 | int btrfs_duplicate_item(struct btrfs_trans_handle *trans, |
2607 | struct btrfs_root *root, | |
2608 | struct btrfs_path *path, | |
2609 | struct btrfs_key *new_key); | |
e089f05c CM |
2610 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
2611 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
2612 | ins_len, int cow); | |
6702ed49 | 2613 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
5f39d397 | 2614 | struct btrfs_root *root, struct extent_buffer *parent, |
a6b6e75e CM |
2615 | int start_slot, int cache_only, u64 *last_ret, |
2616 | struct btrfs_key *progress); | |
b3b4aa74 | 2617 | void btrfs_release_path(struct btrfs_path *p); |
2c90e5d6 CM |
2618 | struct btrfs_path *btrfs_alloc_path(void); |
2619 | void btrfs_free_path(struct btrfs_path *p); | |
b4ce94de | 2620 | void btrfs_set_path_blocking(struct btrfs_path *p); |
16cdcec7 | 2621 | void btrfs_clear_path_blocking(struct btrfs_path *p, |
bd681513 | 2622 | struct extent_buffer *held, int held_rw); |
b4ce94de CM |
2623 | void btrfs_unlock_up_safe(struct btrfs_path *p, int level); |
2624 | ||
85e21bac CM |
2625 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
2626 | struct btrfs_path *path, int slot, int nr); | |
85e21bac CM |
2627 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, |
2628 | struct btrfs_root *root, | |
2629 | struct btrfs_path *path) | |
2630 | { | |
2631 | return btrfs_del_items(trans, root, path, path->slots[0], 1); | |
2632 | } | |
2633 | ||
143bede5 JM |
2634 | void setup_items_for_insert(struct btrfs_trans_handle *trans, |
2635 | struct btrfs_root *root, struct btrfs_path *path, | |
2636 | struct btrfs_key *cpu_key, u32 *data_size, | |
2637 | u32 total_data, u32 total_size, int nr); | |
e089f05c CM |
2638 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
2639 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
9c58309d CM |
2640 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
2641 | struct btrfs_root *root, | |
2642 | struct btrfs_path *path, | |
2643 | struct btrfs_key *cpu_key, u32 *data_size, int nr); | |
2644 | ||
2645 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, | |
2646 | struct btrfs_root *root, | |
2647 | struct btrfs_path *path, | |
2648 | struct btrfs_key *key, | |
2649 | u32 data_size) | |
2650 | { | |
2651 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); | |
2652 | } | |
2653 | ||
234b63a0 | 2654 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
c7d22a3c JS |
2655 | static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) |
2656 | { | |
2657 | ++p->slots[0]; | |
2658 | if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) | |
2659 | return btrfs_next_leaf(root, p); | |
2660 | return 0; | |
2661 | } | |
7bb86316 | 2662 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
5f39d397 | 2663 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
2c536799 JM |
2664 | int __must_check btrfs_drop_snapshot(struct btrfs_root *root, |
2665 | struct btrfs_block_rsv *block_rsv, | |
2666 | int update_ref, int for_reloc); | |
f82d02d9 YZ |
2667 | int btrfs_drop_subtree(struct btrfs_trans_handle *trans, |
2668 | struct btrfs_root *root, | |
2669 | struct extent_buffer *node, | |
2670 | struct extent_buffer *parent); | |
7841cb28 DS |
2671 | static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) |
2672 | { | |
2673 | /* | |
2674 | * Get synced with close_ctree() | |
2675 | */ | |
2676 | smp_mb(); | |
2677 | return fs_info->closing; | |
2678 | } | |
6c41761f DS |
2679 | static inline void free_fs_info(struct btrfs_fs_info *fs_info) |
2680 | { | |
837d5b6e | 2681 | kfree(fs_info->balance_ctl); |
6c41761f DS |
2682 | kfree(fs_info->delayed_root); |
2683 | kfree(fs_info->extent_root); | |
2684 | kfree(fs_info->tree_root); | |
2685 | kfree(fs_info->chunk_root); | |
2686 | kfree(fs_info->dev_root); | |
2687 | kfree(fs_info->csum_root); | |
2688 | kfree(fs_info->super_copy); | |
2689 | kfree(fs_info->super_for_commit); | |
2690 | kfree(fs_info); | |
2691 | } | |
70922617 ID |
2692 | /** |
2693 | * profile_is_valid - tests whether a given profile is valid and reduced | |
2694 | * @flags: profile to validate | |
2695 | * @extended: if true @flags is treated as an extended profile | |
2696 | */ | |
2697 | static inline int profile_is_valid(u64 flags, int extended) | |
2698 | { | |
2699 | u64 mask = ~BTRFS_BLOCK_GROUP_PROFILE_MASK; | |
2700 | ||
2701 | flags &= ~BTRFS_BLOCK_GROUP_TYPE_MASK; | |
2702 | if (extended) | |
2703 | mask &= ~BTRFS_AVAIL_ALLOC_BIT_SINGLE; | |
2704 | ||
2705 | if (flags & mask) | |
2706 | return 0; | |
2707 | /* true if zero or exactly one bit set */ | |
2708 | return (flags & (~flags + 1)) == flags; | |
2709 | } | |
7841cb28 | 2710 | |
dee26a9f | 2711 | /* root-item.c */ |
ea9e8b11 | 2712 | int btrfs_find_root_ref(struct btrfs_root *tree_root, |
4df27c4d YZ |
2713 | struct btrfs_path *path, |
2714 | u64 root_id, u64 ref_id); | |
0660b5af CM |
2715 | int btrfs_add_root_ref(struct btrfs_trans_handle *trans, |
2716 | struct btrfs_root *tree_root, | |
4df27c4d YZ |
2717 | u64 root_id, u64 ref_id, u64 dirid, u64 sequence, |
2718 | const char *name, int name_len); | |
2719 | int btrfs_del_root_ref(struct btrfs_trans_handle *trans, | |
2720 | struct btrfs_root *tree_root, | |
2721 | u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, | |
0660b5af | 2722 | const char *name, int name_len); |
e089f05c CM |
2723 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
2724 | struct btrfs_key *key); | |
2725 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
2726 | *root, struct btrfs_key *key, struct btrfs_root_item | |
2727 | *item); | |
b45a9d8b JM |
2728 | int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, |
2729 | struct btrfs_root *root, | |
2730 | struct btrfs_key *key, | |
2731 | struct btrfs_root_item *item); | |
e089f05c CM |
2732 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct |
2733 | btrfs_root_item *item, struct btrfs_key *key); | |
5d4f98a2 | 2734 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid); |
76dda93c | 2735 | int btrfs_find_orphan_roots(struct btrfs_root *tree_root); |
bf5f32ec MF |
2736 | void btrfs_set_root_node(struct btrfs_root_item *item, |
2737 | struct extent_buffer *node); | |
08fe4db1 LZ |
2738 | void btrfs_check_and_init_root_item(struct btrfs_root_item *item); |
2739 | ||
dee26a9f | 2740 | /* dir-item.c */ |
d397712b CM |
2741 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, |
2742 | struct btrfs_root *root, const char *name, | |
16cdcec7 | 2743 | int name_len, struct inode *dir, |
aec7477b | 2744 | struct btrfs_key *location, u8 type, u64 index); |
7e38180e CM |
2745 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
2746 | struct btrfs_root *root, | |
2747 | struct btrfs_path *path, u64 dir, | |
2748 | const char *name, int name_len, | |
2749 | int mod); | |
2750 | struct btrfs_dir_item * | |
2751 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | |
2752 | struct btrfs_root *root, | |
2753 | struct btrfs_path *path, u64 dir, | |
2754 | u64 objectid, const char *name, int name_len, | |
2755 | int mod); | |
4df27c4d YZ |
2756 | struct btrfs_dir_item * |
2757 | btrfs_search_dir_index_item(struct btrfs_root *root, | |
2758 | struct btrfs_path *path, u64 dirid, | |
2759 | const char *name, int name_len); | |
7e38180e CM |
2760 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, |
2761 | struct btrfs_path *path, | |
7f5c1516 | 2762 | const char *name, int name_len); |
7e38180e CM |
2763 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
2764 | struct btrfs_root *root, | |
2765 | struct btrfs_path *path, | |
2766 | struct btrfs_dir_item *di); | |
5103e947 | 2767 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
f34f57a3 YZ |
2768 | struct btrfs_root *root, |
2769 | struct btrfs_path *path, u64 objectid, | |
2770 | const char *name, u16 name_len, | |
2771 | const void *data, u16 data_len); | |
5103e947 JB |
2772 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, |
2773 | struct btrfs_root *root, | |
2774 | struct btrfs_path *path, u64 dir, | |
2775 | const char *name, u16 name_len, | |
2776 | int mod); | |
22a94d44 JB |
2777 | int verify_dir_item(struct btrfs_root *root, |
2778 | struct extent_buffer *leaf, | |
2779 | struct btrfs_dir_item *dir_item); | |
7b128766 JB |
2780 | |
2781 | /* orphan.c */ | |
2782 | int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, | |
2783 | struct btrfs_root *root, u64 offset); | |
2784 | int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, | |
2785 | struct btrfs_root *root, u64 offset); | |
4df27c4d | 2786 | int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); |
7b128766 | 2787 | |
dee26a9f | 2788 | /* inode-item.c */ |
3954401f CM |
2789 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
2790 | struct btrfs_root *root, | |
2791 | const char *name, int name_len, | |
aec7477b | 2792 | u64 inode_objectid, u64 ref_objectid, u64 index); |
3954401f CM |
2793 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, |
2794 | struct btrfs_root *root, | |
2795 | const char *name, int name_len, | |
aec7477b | 2796 | u64 inode_objectid, u64 ref_objectid, u64 *index); |
a22285a6 YZ |
2797 | struct btrfs_inode_ref * |
2798 | btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans, | |
2799 | struct btrfs_root *root, | |
2800 | struct btrfs_path *path, | |
2801 | const char *name, int name_len, | |
2802 | u64 inode_objectid, u64 ref_objectid, int mod); | |
5f39d397 CM |
2803 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
2804 | struct btrfs_root *root, | |
2805 | struct btrfs_path *path, u64 objectid); | |
293ffd5f | 2806 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
d6e4a428 CM |
2807 | *root, struct btrfs_path *path, |
2808 | struct btrfs_key *location, int mod); | |
dee26a9f CM |
2809 | |
2810 | /* file-item.c */ | |
459931ec CM |
2811 | int btrfs_del_csums(struct btrfs_trans_handle *trans, |
2812 | struct btrfs_root *root, u64 bytenr, u64 len); | |
61b49440 | 2813 | int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, |
d20f7043 | 2814 | struct bio *bio, u32 *dst); |
4b46fce2 JB |
2815 | int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode, |
2816 | struct bio *bio, u64 logical_offset, u32 *dst); | |
b18c6685 | 2817 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
c8b97818 CM |
2818 | struct btrfs_root *root, |
2819 | u64 objectid, u64 pos, | |
2820 | u64 disk_offset, u64 disk_num_bytes, | |
2821 | u64 num_bytes, u64 offset, u64 ram_bytes, | |
2822 | u8 compression, u8 encryption, u16 other_encoding); | |
dee26a9f CM |
2823 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
2824 | struct btrfs_root *root, | |
2825 | struct btrfs_path *path, u64 objectid, | |
db94535d | 2826 | u64 bytenr, int mod); |
065631f6 | 2827 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
d20f7043 | 2828 | struct btrfs_root *root, |
e6dcd2dc | 2829 | struct btrfs_ordered_sum *sums); |
3edf7d33 | 2830 | int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, |
d20f7043 | 2831 | struct bio *bio, u64 file_start, int contig); |
b18c6685 CM |
2832 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
2833 | struct btrfs_root *root, | |
2834 | struct btrfs_path *path, | |
d20f7043 | 2835 | u64 bytenr, int cow); |
1de037a4 CM |
2836 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
2837 | struct btrfs_root *root, struct btrfs_path *path, | |
2838 | u64 isize); | |
a2de733c AJ |
2839 | int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, |
2840 | struct list_head *list, int search_commit); | |
39279cc3 | 2841 | /* inode.c */ |
b2675157 JB |
2842 | struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page, |
2843 | size_t pg_offset, u64 start, u64 len, | |
2844 | int create); | |
4881ee5a CM |
2845 | |
2846 | /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ | |
5036f538 | 2847 | #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) |
4881ee5a CM |
2848 | #define ClearPageChecked ClearPageFsMisc |
2849 | #define SetPageChecked SetPageFsMisc | |
2850 | #define PageChecked PageFsMisc | |
2851 | #endif | |
2852 | ||
b6973aa6 LZ |
2853 | /* This forces readahead on a given range of bytes in an inode */ |
2854 | static inline void btrfs_force_ra(struct address_space *mapping, | |
2855 | struct file_ra_state *ra, struct file *file, | |
2856 | pgoff_t offset, unsigned long req_size) | |
2857 | { | |
2858 | page_cache_sync_readahead(mapping, ra, file, offset, req_size); | |
2859 | } | |
2860 | ||
3de4586c CM |
2861 | struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); |
2862 | int btrfs_set_inode_index(struct inode *dir, u64 *index); | |
e02119d5 CM |
2863 | int btrfs_unlink_inode(struct btrfs_trans_handle *trans, |
2864 | struct btrfs_root *root, | |
2865 | struct inode *dir, struct inode *inode, | |
2866 | const char *name, int name_len); | |
2867 | int btrfs_add_link(struct btrfs_trans_handle *trans, | |
2868 | struct inode *parent_inode, struct inode *inode, | |
2869 | const char *name, int name_len, int add_backref, u64 index); | |
4df27c4d YZ |
2870 | int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, |
2871 | struct btrfs_root *root, | |
2872 | struct inode *dir, u64 objectid, | |
2873 | const char *name, int name_len); | |
e02119d5 CM |
2874 | int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, |
2875 | struct btrfs_root *root, | |
2876 | struct inode *inode, u64 new_size, | |
2877 | u32 min_type); | |
2878 | ||
24bbcf04 | 2879 | int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); |
2ac55d41 JB |
2880 | int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, |
2881 | struct extent_state **cached_state); | |
f421950f CM |
2882 | int btrfs_writepages(struct address_space *mapping, |
2883 | struct writeback_control *wbc); | |
d2fb3437 | 2884 | int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, |
d82a6f1d | 2885 | struct btrfs_root *new_root, u64 new_dirid); |
239b14b3 | 2886 | int btrfs_merge_bio_hook(struct page *page, unsigned long offset, |
c8b97818 | 2887 | size_t size, struct bio *bio, unsigned long bio_flags); |
239b14b3 | 2888 | |
c2ec175c | 2889 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); |
9ebefb18 | 2890 | int btrfs_readpage(struct file *file, struct page *page); |
bd555975 | 2891 | void btrfs_evict_inode(struct inode *inode); |
a9185b41 | 2892 | int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); |
22c44fe6 JB |
2893 | int btrfs_dirty_inode(struct inode *inode); |
2894 | int btrfs_update_time(struct file *file); | |
39279cc3 CM |
2895 | struct inode *btrfs_alloc_inode(struct super_block *sb); |
2896 | void btrfs_destroy_inode(struct inode *inode); | |
45321ac5 | 2897 | int btrfs_drop_inode(struct inode *inode); |
39279cc3 CM |
2898 | int btrfs_init_cachep(void); |
2899 | void btrfs_destroy_cachep(void); | |
6bf13c0c | 2900 | long btrfs_ioctl_trans_end(struct file *file); |
1a54ef8c | 2901 | struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, |
73f73415 | 2902 | struct btrfs_root *root, int *was_new); |
a52d9a80 | 2903 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
306e16ce | 2904 | size_t pg_offset, u64 start, u64 end, |
a52d9a80 CM |
2905 | int create); |
2906 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
2907 | struct btrfs_root *root, | |
2908 | struct inode *inode); | |
5b21f2ed ZY |
2909 | int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode); |
2910 | int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode); | |
66b4ffd1 | 2911 | int btrfs_orphan_cleanup(struct btrfs_root *root); |
d68fc57b YZ |
2912 | void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, |
2913 | struct btrfs_root *root); | |
a41ad394 | 2914 | int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); |
143bede5 | 2915 | void btrfs_invalidate_inodes(struct btrfs_root *root); |
24bbcf04 YZ |
2916 | void btrfs_add_delayed_iput(struct inode *inode); |
2917 | void btrfs_run_delayed_iputs(struct btrfs_root *root); | |
efa56464 YZ |
2918 | int btrfs_prealloc_file_range(struct inode *inode, int mode, |
2919 | u64 start, u64 num_bytes, u64 min_size, | |
2920 | loff_t actual_len, u64 *alloc_hint); | |
0af3d00b JB |
2921 | int btrfs_prealloc_file_range_trans(struct inode *inode, |
2922 | struct btrfs_trans_handle *trans, int mode, | |
2923 | u64 start, u64 num_bytes, u64 min_size, | |
2924 | loff_t actual_len, u64 *alloc_hint); | |
82d339d9 | 2925 | extern const struct dentry_operations btrfs_dentry_operations; |
f46b5a66 CH |
2926 | |
2927 | /* ioctl.c */ | |
2928 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); | |
6cbff00f CH |
2929 | void btrfs_update_iflags(struct inode *inode); |
2930 | void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); | |
4cb5300b CM |
2931 | int btrfs_defrag_file(struct inode *inode, struct file *file, |
2932 | struct btrfs_ioctl_defrag_range_args *range, | |
2933 | u64 newer_than, unsigned long max_pages); | |
39279cc3 | 2934 | /* file.c */ |
4cb5300b CM |
2935 | int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, |
2936 | struct inode *inode); | |
2937 | int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); | |
02c24a82 | 2938 | int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); |
5b21f2ed ZY |
2939 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, |
2940 | int skip_pinned); | |
828c0950 | 2941 | extern const struct file_operations btrfs_file_operations; |
920bbbfb YZ |
2942 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode, |
2943 | u64 start, u64 end, u64 *hint_byte, int drop_cache); | |
d899e052 | 2944 | int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, |
d899e052 | 2945 | struct inode *inode, u64 start, u64 end); |
6bf13c0c | 2946 | int btrfs_release_file(struct inode *inode, struct file *file); |
be1a12a0 JB |
2947 | void btrfs_drop_pages(struct page **pages, size_t num_pages); |
2948 | int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode, | |
2949 | struct page **pages, size_t num_pages, | |
2950 | loff_t pos, size_t write_bytes, | |
2951 | struct extent_state **cached); | |
6bf13c0c | 2952 | |
6702ed49 CM |
2953 | /* tree-defrag.c */ |
2954 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | |
2955 | struct btrfs_root *root, int cache_only); | |
58176a96 JB |
2956 | |
2957 | /* sysfs.c */ | |
2958 | int btrfs_init_sysfs(void); | |
2959 | void btrfs_exit_sysfs(void); | |
58176a96 | 2960 | |
5103e947 JB |
2961 | /* xattr.c */ |
2962 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
6099afe8 | 2963 | |
edbd8d4e | 2964 | /* super.c */ |
edf24abe | 2965 | int btrfs_parse_options(struct btrfs_root *root, char *options); |
6bf13c0c | 2966 | int btrfs_sync_fs(struct super_block *sb, int wait); |
acce952b | 2967 | void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function, |
2968 | unsigned int line, int errno); | |
2969 | ||
2970 | #define btrfs_std_error(fs_info, errno) \ | |
2971 | do { \ | |
2972 | if ((errno)) \ | |
2973 | __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\ | |
2974 | } while (0) | |
33268eaf | 2975 | |
8c342930 JM |
2976 | void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, |
2977 | unsigned int line, int errno, const char *fmt, ...); | |
2978 | ||
2979 | #define btrfs_panic(fs_info, errno, fmt, args...) \ | |
2980 | do { \ | |
2981 | struct btrfs_fs_info *_i = (fs_info); \ | |
2982 | __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \ | |
2983 | BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \ | |
2984 | } while (0) | |
2985 | ||
33268eaf | 2986 | /* acl.c */ |
0eda294d | 2987 | #ifdef CONFIG_BTRFS_FS_POSIX_ACL |
4e34e719 | 2988 | struct posix_acl *btrfs_get_acl(struct inode *inode, int type); |
f34f57a3 YZ |
2989 | int btrfs_init_acl(struct btrfs_trans_handle *trans, |
2990 | struct inode *inode, struct inode *dir); | |
33268eaf | 2991 | int btrfs_acl_chmod(struct inode *inode); |
9b89d95a | 2992 | #else |
ed8f3737 | 2993 | #define btrfs_get_acl NULL |
9b89d95a LZ |
2994 | static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, |
2995 | struct inode *inode, struct inode *dir) | |
2996 | { | |
2997 | return 0; | |
2998 | } | |
2999 | static inline int btrfs_acl_chmod(struct inode *inode) | |
3000 | { | |
3001 | return 0; | |
3002 | } | |
3003 | #endif | |
0f9dd46c | 3004 | |
5d4f98a2 YZ |
3005 | /* relocation.c */ |
3006 | int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start); | |
3007 | int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, | |
3008 | struct btrfs_root *root); | |
3009 | int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, | |
3010 | struct btrfs_root *root); | |
3011 | int btrfs_recover_relocation(struct btrfs_root *root); | |
3012 | int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); | |
3fd0a558 YZ |
3013 | void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, |
3014 | struct btrfs_root *root, struct extent_buffer *buf, | |
3015 | struct extent_buffer *cow); | |
3016 | void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans, | |
3017 | struct btrfs_pending_snapshot *pending, | |
3018 | u64 *bytes_to_reserve); | |
3019 | void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, | |
3020 | struct btrfs_pending_snapshot *pending); | |
a2de733c AJ |
3021 | |
3022 | /* scrub.c */ | |
3023 | int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end, | |
8628764e | 3024 | struct btrfs_scrub_progress *progress, int readonly); |
143bede5 JM |
3025 | void btrfs_scrub_pause(struct btrfs_root *root); |
3026 | void btrfs_scrub_pause_super(struct btrfs_root *root); | |
3027 | void btrfs_scrub_continue(struct btrfs_root *root); | |
3028 | void btrfs_scrub_continue_super(struct btrfs_root *root); | |
a2de733c AJ |
3029 | int btrfs_scrub_cancel(struct btrfs_root *root); |
3030 | int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev); | |
3031 | int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid); | |
3032 | int btrfs_scrub_progress(struct btrfs_root *root, u64 devid, | |
3033 | struct btrfs_scrub_progress *progress); | |
3034 | ||
7414a03f AJ |
3035 | /* reada.c */ |
3036 | struct reada_control { | |
3037 | struct btrfs_root *root; /* tree to prefetch */ | |
3038 | struct btrfs_key key_start; | |
3039 | struct btrfs_key key_end; /* exclusive */ | |
3040 | atomic_t elems; | |
3041 | struct kref refcnt; | |
3042 | wait_queue_head_t wait; | |
3043 | }; | |
3044 | struct reada_control *btrfs_reada_add(struct btrfs_root *root, | |
3045 | struct btrfs_key *start, struct btrfs_key *end); | |
3046 | int btrfs_reada_wait(void *handle); | |
3047 | void btrfs_reada_detach(void *handle); | |
3048 | int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb, | |
3049 | u64 start, int err); | |
3050 | ||
eb60ceac | 3051 | #endif |