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Diffstat (limited to 'fs/btrfs/ctree.h')
-rw-r--r-- | fs/btrfs/ctree.h | 2129 |
1 files changed, 2129 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h new file mode 100644 index 000000000000..eee060f88113 --- /dev/null +++ b/fs/btrfs/ctree.h | |||
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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 | |||
19 | #ifndef __BTRFS_CTREE__ | ||
20 | #define __BTRFS_CTREE__ | ||
21 | |||
22 | #include <linux/version.h> | ||
23 | #include <linux/mm.h> | ||
24 | #include <linux/highmem.h> | ||
25 | #include <linux/fs.h> | ||
26 | #include <linux/completion.h> | ||
27 | #include <linux/backing-dev.h> | ||
28 | #include <linux/wait.h> | ||
29 | #include <asm/kmap_types.h> | ||
30 | #include "extent_io.h" | ||
31 | #include "extent_map.h" | ||
32 | #include "async-thread.h" | ||
33 | |||
34 | struct btrfs_trans_handle; | ||
35 | struct btrfs_transaction; | ||
36 | extern struct kmem_cache *btrfs_trans_handle_cachep; | ||
37 | extern struct kmem_cache *btrfs_transaction_cachep; | ||
38 | extern struct kmem_cache *btrfs_bit_radix_cachep; | ||
39 | extern struct kmem_cache *btrfs_path_cachep; | ||
40 | struct btrfs_ordered_sum; | ||
41 | |||
42 | #define BTRFS_MAGIC "_BHRfS_M" | ||
43 | |||
44 | #define BTRFS_ACL_NOT_CACHED ((void *)-1) | ||
45 | |||
46 | #ifdef CONFIG_LOCKDEP | ||
47 | # define BTRFS_MAX_LEVEL 7 | ||
48 | #else | ||
49 | # define BTRFS_MAX_LEVEL 8 | ||
50 | #endif | ||
51 | |||
52 | /* holds pointers to all of the tree roots */ | ||
53 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL | ||
54 | |||
55 | /* stores information about which extents are in use, and reference counts */ | ||
56 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL | ||
57 | |||
58 | /* | ||
59 | * chunk tree stores translations from logical -> physical block numbering | ||
60 | * the super block points to the chunk tree | ||
61 | */ | ||
62 | #define BTRFS_CHUNK_TREE_OBJECTID 3ULL | ||
63 | |||
64 | /* | ||
65 | * stores information about which areas of a given device are in use. | ||
66 | * one per device. The tree of tree roots points to the device tree | ||
67 | */ | ||
68 | #define BTRFS_DEV_TREE_OBJECTID 4ULL | ||
69 | |||
70 | /* one per subvolume, storing files and directories */ | ||
71 | #define BTRFS_FS_TREE_OBJECTID 5ULL | ||
72 | |||
73 | /* directory objectid inside the root tree */ | ||
74 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL | ||
75 | |||
76 | /* holds checksums of all the data extents */ | ||
77 | #define BTRFS_CSUM_TREE_OBJECTID 7ULL | ||
78 | |||
79 | /* orhpan objectid for tracking unlinked/truncated files */ | ||
80 | #define BTRFS_ORPHAN_OBJECTID -5ULL | ||
81 | |||
82 | /* does write ahead logging to speed up fsyncs */ | ||
83 | #define BTRFS_TREE_LOG_OBJECTID -6ULL | ||
84 | #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL | ||
85 | |||
86 | /* for space balancing */ | ||
87 | #define BTRFS_TREE_RELOC_OBJECTID -8ULL | ||
88 | #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL | ||
89 | |||
90 | /* | ||
91 | * extent checksums all have this objectid | ||
92 | * this allows them to share the logging tree | ||
93 | * for fsyncs | ||
94 | */ | ||
95 | #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL | ||
96 | |||
97 | /* dummy objectid represents multiple objectids */ | ||
98 | #define BTRFS_MULTIPLE_OBJECTIDS -255ULL | ||
99 | |||
100 | /* | ||
101 | * All files have objectids in this range. | ||
102 | */ | ||
103 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL | ||
104 | #define BTRFS_LAST_FREE_OBJECTID -256ULL | ||
105 | #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL | ||
106 | |||
107 | |||
108 | /* | ||
109 | * the device items go into the chunk tree. The key is in the form | ||
110 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] | ||
111 | */ | ||
112 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL | ||
113 | |||
114 | /* | ||
115 | * we can actually store much bigger names, but lets not confuse the rest | ||
116 | * of linux | ||
117 | */ | ||
118 | #define BTRFS_NAME_LEN 255 | ||
119 | |||
120 | /* 32 bytes in various csum fields */ | ||
121 | #define BTRFS_CSUM_SIZE 32 | ||
122 | |||
123 | /* csum types */ | ||
124 | #define BTRFS_CSUM_TYPE_CRC32 0 | ||
125 | |||
126 | static int btrfs_csum_sizes[] = { 4, 0 }; | ||
127 | |||
128 | /* four bytes for CRC32 */ | ||
129 | #define BTRFS_EMPTY_DIR_SIZE 0 | ||
130 | |||
131 | #define BTRFS_FT_UNKNOWN 0 | ||
132 | #define BTRFS_FT_REG_FILE 1 | ||
133 | #define BTRFS_FT_DIR 2 | ||
134 | #define BTRFS_FT_CHRDEV 3 | ||
135 | #define BTRFS_FT_BLKDEV 4 | ||
136 | #define BTRFS_FT_FIFO 5 | ||
137 | #define BTRFS_FT_SOCK 6 | ||
138 | #define BTRFS_FT_SYMLINK 7 | ||
139 | #define BTRFS_FT_XATTR 8 | ||
140 | #define BTRFS_FT_MAX 9 | ||
141 | |||
142 | /* | ||
143 | * the key defines the order in the tree, and so it also defines (optimal) | ||
144 | * block layout. objectid corresonds to the inode number. The flags | ||
145 | * tells us things about the object, and is a kind of stream selector. | ||
146 | * so for a given inode, keys with flags of 1 might refer to the inode | ||
147 | * data, flags of 2 may point to file data in the btree and flags == 3 | ||
148 | * may point to extents. | ||
149 | * | ||
150 | * offset is the starting byte offset for this key in the stream. | ||
151 | * | ||
152 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always | ||
153 | * in cpu native order. Otherwise they are identical and their sizes | ||
154 | * should be the same (ie both packed) | ||
155 | */ | ||
156 | struct btrfs_disk_key { | ||
157 | __le64 objectid; | ||
158 | u8 type; | ||
159 | __le64 offset; | ||
160 | } __attribute__ ((__packed__)); | ||
161 | |||
162 | struct btrfs_key { | ||
163 | u64 objectid; | ||
164 | u8 type; | ||
165 | u64 offset; | ||
166 | } __attribute__ ((__packed__)); | ||
167 | |||
168 | struct btrfs_mapping_tree { | ||
169 | struct extent_map_tree map_tree; | ||
170 | }; | ||
171 | |||
172 | #define BTRFS_UUID_SIZE 16 | ||
173 | struct btrfs_dev_item { | ||
174 | /* the internal btrfs device id */ | ||
175 | __le64 devid; | ||
176 | |||
177 | /* size of the device */ | ||
178 | __le64 total_bytes; | ||
179 | |||
180 | /* bytes used */ | ||
181 | __le64 bytes_used; | ||
182 | |||
183 | /* optimal io alignment for this device */ | ||
184 | __le32 io_align; | ||
185 | |||
186 | /* optimal io width for this device */ | ||
187 | __le32 io_width; | ||
188 | |||
189 | /* minimal io size for this device */ | ||
190 | __le32 sector_size; | ||
191 | |||
192 | /* type and info about this device */ | ||
193 | __le64 type; | ||
194 | |||
195 | /* expected generation for this device */ | ||
196 | __le64 generation; | ||
197 | |||
198 | /* | ||
199 | * starting byte of this partition on the device, | ||
200 | * to allowr for stripe alignment in the future | ||
201 | */ | ||
202 | __le64 start_offset; | ||
203 | |||
204 | /* grouping information for allocation decisions */ | ||
205 | __le32 dev_group; | ||
206 | |||
207 | /* seek speed 0-100 where 100 is fastest */ | ||
208 | u8 seek_speed; | ||
209 | |||
210 | /* bandwidth 0-100 where 100 is fastest */ | ||
211 | u8 bandwidth; | ||
212 | |||
213 | /* btrfs generated uuid for this device */ | ||
214 | u8 uuid[BTRFS_UUID_SIZE]; | ||
215 | |||
216 | /* uuid of FS who owns this device */ | ||
217 | u8 fsid[BTRFS_UUID_SIZE]; | ||
218 | } __attribute__ ((__packed__)); | ||
219 | |||
220 | struct btrfs_stripe { | ||
221 | __le64 devid; | ||
222 | __le64 offset; | ||
223 | u8 dev_uuid[BTRFS_UUID_SIZE]; | ||
224 | } __attribute__ ((__packed__)); | ||
225 | |||
226 | struct btrfs_chunk { | ||
227 | /* size of this chunk in bytes */ | ||
228 | __le64 length; | ||
229 | |||
230 | /* objectid of the root referencing this chunk */ | ||
231 | __le64 owner; | ||
232 | |||
233 | __le64 stripe_len; | ||
234 | __le64 type; | ||
235 | |||
236 | /* optimal io alignment for this chunk */ | ||
237 | __le32 io_align; | ||
238 | |||
239 | /* optimal io width for this chunk */ | ||
240 | __le32 io_width; | ||
241 | |||
242 | /* minimal io size for this chunk */ | ||
243 | __le32 sector_size; | ||
244 | |||
245 | /* 2^16 stripes is quite a lot, a second limit is the size of a single | ||
246 | * item in the btree | ||
247 | */ | ||
248 | __le16 num_stripes; | ||
249 | |||
250 | /* sub stripes only matter for raid10 */ | ||
251 | __le16 sub_stripes; | ||
252 | struct btrfs_stripe stripe; | ||
253 | /* additional stripes go here */ | ||
254 | } __attribute__ ((__packed__)); | ||
255 | |||
256 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) | ||
257 | { | ||
258 | BUG_ON(num_stripes == 0); | ||
259 | return sizeof(struct btrfs_chunk) + | ||
260 | sizeof(struct btrfs_stripe) * (num_stripes - 1); | ||
261 | } | ||
262 | |||
263 | #define BTRFS_FSID_SIZE 16 | ||
264 | #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0) | ||
265 | |||
266 | /* | ||
267 | * every tree block (leaf or node) starts with this header. | ||
268 | */ | ||
269 | struct btrfs_header { | ||
270 | /* these first four must match the super block */ | ||
271 | u8 csum[BTRFS_CSUM_SIZE]; | ||
272 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ | ||
273 | __le64 bytenr; /* which block this node is supposed to live in */ | ||
274 | __le64 flags; | ||
275 | |||
276 | /* allowed to be different from the super from here on down */ | ||
277 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; | ||
278 | __le64 generation; | ||
279 | __le64 owner; | ||
280 | __le32 nritems; | ||
281 | u8 level; | ||
282 | } __attribute__ ((__packed__)); | ||
283 | |||
284 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ | ||
285 | sizeof(struct btrfs_header)) / \ | ||
286 | sizeof(struct btrfs_key_ptr)) | ||
287 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) | ||
288 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) | ||
289 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ | ||
290 | sizeof(struct btrfs_item) - \ | ||
291 | sizeof(struct btrfs_file_extent_item)) | ||
292 | |||
293 | #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32) | ||
294 | |||
295 | /* | ||
296 | * this is a very generous portion of the super block, giving us | ||
297 | * room to translate 14 chunks with 3 stripes each. | ||
298 | */ | ||
299 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 | ||
300 | #define BTRFS_LABEL_SIZE 256 | ||
301 | |||
302 | /* | ||
303 | * the super block basically lists the main trees of the FS | ||
304 | * it currently lacks any block count etc etc | ||
305 | */ | ||
306 | struct btrfs_super_block { | ||
307 | u8 csum[BTRFS_CSUM_SIZE]; | ||
308 | /* the first 4 fields must match struct btrfs_header */ | ||
309 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ | ||
310 | __le64 bytenr; /* this block number */ | ||
311 | __le64 flags; | ||
312 | |||
313 | /* allowed to be different from the btrfs_header from here own down */ | ||
314 | __le64 magic; | ||
315 | __le64 generation; | ||
316 | __le64 root; | ||
317 | __le64 chunk_root; | ||
318 | __le64 log_root; | ||
319 | |||
320 | /* this will help find the new super based on the log root */ | ||
321 | __le64 log_root_transid; | ||
322 | __le64 total_bytes; | ||
323 | __le64 bytes_used; | ||
324 | __le64 root_dir_objectid; | ||
325 | __le64 num_devices; | ||
326 | __le32 sectorsize; | ||
327 | __le32 nodesize; | ||
328 | __le32 leafsize; | ||
329 | __le32 stripesize; | ||
330 | __le32 sys_chunk_array_size; | ||
331 | __le64 chunk_root_generation; | ||
332 | __le64 compat_flags; | ||
333 | __le64 compat_ro_flags; | ||
334 | __le64 incompat_flags; | ||
335 | __le16 csum_type; | ||
336 | u8 root_level; | ||
337 | u8 chunk_root_level; | ||
338 | u8 log_root_level; | ||
339 | struct btrfs_dev_item dev_item; | ||
340 | |||
341 | char label[BTRFS_LABEL_SIZE]; | ||
342 | |||
343 | /* future expansion */ | ||
344 | __le64 reserved[32]; | ||
345 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; | ||
346 | } __attribute__ ((__packed__)); | ||
347 | |||
348 | /* | ||
349 | * Compat flags that we support. If any incompat flags are set other than the | ||
350 | * ones specified below then we will fail to mount | ||
351 | */ | ||
352 | #define BTRFS_FEATURE_COMPAT_SUPP 0x0 | ||
353 | #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0 | ||
354 | #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0 | ||
355 | |||
356 | /* | ||
357 | * A leaf is full of items. offset and size tell us where to find | ||
358 | * the item in the leaf (relative to the start of the data area) | ||
359 | */ | ||
360 | struct btrfs_item { | ||
361 | struct btrfs_disk_key key; | ||
362 | __le32 offset; | ||
363 | __le32 size; | ||
364 | } __attribute__ ((__packed__)); | ||
365 | |||
366 | /* | ||
367 | * leaves have an item area and a data area: | ||
368 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | ||
369 | * | ||
370 | * The data is separate from the items to get the keys closer together | ||
371 | * during searches. | ||
372 | */ | ||
373 | struct btrfs_leaf { | ||
374 | struct btrfs_header header; | ||
375 | struct btrfs_item items[]; | ||
376 | } __attribute__ ((__packed__)); | ||
377 | |||
378 | /* | ||
379 | * all non-leaf blocks are nodes, they hold only keys and pointers to | ||
380 | * other blocks | ||
381 | */ | ||
382 | struct btrfs_key_ptr { | ||
383 | struct btrfs_disk_key key; | ||
384 | __le64 blockptr; | ||
385 | __le64 generation; | ||
386 | } __attribute__ ((__packed__)); | ||
387 | |||
388 | struct btrfs_node { | ||
389 | struct btrfs_header header; | ||
390 | struct btrfs_key_ptr ptrs[]; | ||
391 | } __attribute__ ((__packed__)); | ||
392 | |||
393 | /* | ||
394 | * btrfs_paths remember the path taken from the root down to the leaf. | ||
395 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | ||
396 | * to any other levels that are present. | ||
397 | * | ||
398 | * The slots array records the index of the item or block pointer | ||
399 | * used while walking the tree. | ||
400 | */ | ||
401 | struct btrfs_path { | ||
402 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; | ||
403 | int slots[BTRFS_MAX_LEVEL]; | ||
404 | /* if there is real range locking, this locks field will change */ | ||
405 | int locks[BTRFS_MAX_LEVEL]; | ||
406 | int reada; | ||
407 | /* keep some upper locks as we walk down */ | ||
408 | int keep_locks; | ||
409 | int skip_locking; | ||
410 | int lowest_level; | ||
411 | |||
412 | /* | ||
413 | * set by btrfs_split_item, tells search_slot to keep all locks | ||
414 | * and to force calls to keep space in the nodes | ||
415 | */ | ||
416 | int search_for_split; | ||
417 | }; | ||
418 | |||
419 | /* | ||
420 | * items in the extent btree are used to record the objectid of the | ||
421 | * owner of the block and the number of references | ||
422 | */ | ||
423 | struct btrfs_extent_item { | ||
424 | __le32 refs; | ||
425 | } __attribute__ ((__packed__)); | ||
426 | |||
427 | struct btrfs_extent_ref { | ||
428 | __le64 root; | ||
429 | __le64 generation; | ||
430 | __le64 objectid; | ||
431 | __le32 num_refs; | ||
432 | } __attribute__ ((__packed__)); | ||
433 | |||
434 | /* dev extents record free space on individual devices. The owner | ||
435 | * field points back to the chunk allocation mapping tree that allocated | ||
436 | * the extent. The chunk tree uuid field is a way to double check the owner | ||
437 | */ | ||
438 | struct btrfs_dev_extent { | ||
439 | __le64 chunk_tree; | ||
440 | __le64 chunk_objectid; | ||
441 | __le64 chunk_offset; | ||
442 | __le64 length; | ||
443 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; | ||
444 | } __attribute__ ((__packed__)); | ||
445 | |||
446 | struct btrfs_inode_ref { | ||
447 | __le64 index; | ||
448 | __le16 name_len; | ||
449 | /* name goes here */ | ||
450 | } __attribute__ ((__packed__)); | ||
451 | |||
452 | struct btrfs_timespec { | ||
453 | __le64 sec; | ||
454 | __le32 nsec; | ||
455 | } __attribute__ ((__packed__)); | ||
456 | |||
457 | typedef enum { | ||
458 | BTRFS_COMPRESS_NONE = 0, | ||
459 | BTRFS_COMPRESS_ZLIB = 1, | ||
460 | BTRFS_COMPRESS_LAST = 2, | ||
461 | } btrfs_compression_type; | ||
462 | |||
463 | /* we don't understand any encryption methods right now */ | ||
464 | typedef enum { | ||
465 | BTRFS_ENCRYPTION_NONE = 0, | ||
466 | BTRFS_ENCRYPTION_LAST = 1, | ||
467 | } btrfs_encryption_type; | ||
468 | |||
469 | struct btrfs_inode_item { | ||
470 | /* nfs style generation number */ | ||
471 | __le64 generation; | ||
472 | /* transid that last touched this inode */ | ||
473 | __le64 transid; | ||
474 | __le64 size; | ||
475 | __le64 nbytes; | ||
476 | __le64 block_group; | ||
477 | __le32 nlink; | ||
478 | __le32 uid; | ||
479 | __le32 gid; | ||
480 | __le32 mode; | ||
481 | __le64 rdev; | ||
482 | __le64 flags; | ||
483 | |||
484 | /* modification sequence number for NFS */ | ||
485 | __le64 sequence; | ||
486 | |||
487 | /* | ||
488 | * a little future expansion, for more than this we can | ||
489 | * just grow the inode item and version it | ||
490 | */ | ||
491 | __le64 reserved[4]; | ||
492 | struct btrfs_timespec atime; | ||
493 | struct btrfs_timespec ctime; | ||
494 | struct btrfs_timespec mtime; | ||
495 | struct btrfs_timespec otime; | ||
496 | } __attribute__ ((__packed__)); | ||
497 | |||
498 | struct btrfs_dir_log_item { | ||
499 | __le64 end; | ||
500 | } __attribute__ ((__packed__)); | ||
501 | |||
502 | struct btrfs_dir_item { | ||
503 | struct btrfs_disk_key location; | ||
504 | __le64 transid; | ||
505 | __le16 data_len; | ||
506 | __le16 name_len; | ||
507 | u8 type; | ||
508 | } __attribute__ ((__packed__)); | ||
509 | |||
510 | struct btrfs_root_item { | ||
511 | struct btrfs_inode_item inode; | ||
512 | __le64 generation; | ||
513 | __le64 root_dirid; | ||
514 | __le64 bytenr; | ||
515 | __le64 byte_limit; | ||
516 | __le64 bytes_used; | ||
517 | __le64 last_snapshot; | ||
518 | __le64 flags; | ||
519 | __le32 refs; | ||
520 | struct btrfs_disk_key drop_progress; | ||
521 | u8 drop_level; | ||
522 | u8 level; | ||
523 | } __attribute__ ((__packed__)); | ||
524 | |||
525 | /* | ||
526 | * this is used for both forward and backward root refs | ||
527 | */ | ||
528 | struct btrfs_root_ref { | ||
529 | __le64 dirid; | ||
530 | __le64 sequence; | ||
531 | __le16 name_len; | ||
532 | } __attribute__ ((__packed__)); | ||
533 | |||
534 | #define BTRFS_FILE_EXTENT_INLINE 0 | ||
535 | #define BTRFS_FILE_EXTENT_REG 1 | ||
536 | #define BTRFS_FILE_EXTENT_PREALLOC 2 | ||
537 | |||
538 | struct btrfs_file_extent_item { | ||
539 | /* | ||
540 | * transaction id that created this extent | ||
541 | */ | ||
542 | __le64 generation; | ||
543 | /* | ||
544 | * max number of bytes to hold this extent in ram | ||
545 | * when we split a compressed extent we can't know how big | ||
546 | * each of the resulting pieces will be. So, this is | ||
547 | * an upper limit on the size of the extent in ram instead of | ||
548 | * an exact limit. | ||
549 | */ | ||
550 | __le64 ram_bytes; | ||
551 | |||
552 | /* | ||
553 | * 32 bits for the various ways we might encode the data, | ||
554 | * including compression and encryption. If any of these | ||
555 | * are set to something a given disk format doesn't understand | ||
556 | * it is treated like an incompat flag for reading and writing, | ||
557 | * but not for stat. | ||
558 | */ | ||
559 | u8 compression; | ||
560 | u8 encryption; | ||
561 | __le16 other_encoding; /* spare for later use */ | ||
562 | |||
563 | /* are we inline data or a real extent? */ | ||
564 | u8 type; | ||
565 | |||
566 | /* | ||
567 | * disk space consumed by the extent, checksum blocks are included | ||
568 | * in these numbers | ||
569 | */ | ||
570 | __le64 disk_bytenr; | ||
571 | __le64 disk_num_bytes; | ||
572 | /* | ||
573 | * the logical offset in file blocks (no csums) | ||
574 | * this extent record is for. This allows a file extent to point | ||
575 | * into the middle of an existing extent on disk, sharing it | ||
576 | * between two snapshots (useful if some bytes in the middle of the | ||
577 | * extent have changed | ||
578 | */ | ||
579 | __le64 offset; | ||
580 | /* | ||
581 | * the logical number of file blocks (no csums included). This | ||
582 | * always reflects the size uncompressed and without encoding. | ||
583 | */ | ||
584 | __le64 num_bytes; | ||
585 | |||
586 | } __attribute__ ((__packed__)); | ||
587 | |||
588 | struct btrfs_csum_item { | ||
589 | u8 csum; | ||
590 | } __attribute__ ((__packed__)); | ||
591 | |||
592 | /* different types of block groups (and chunks) */ | ||
593 | #define BTRFS_BLOCK_GROUP_DATA (1 << 0) | ||
594 | #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1) | ||
595 | #define BTRFS_BLOCK_GROUP_METADATA (1 << 2) | ||
596 | #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3) | ||
597 | #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4) | ||
598 | #define BTRFS_BLOCK_GROUP_DUP (1 << 5) | ||
599 | #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6) | ||
600 | |||
601 | struct btrfs_block_group_item { | ||
602 | __le64 used; | ||
603 | __le64 chunk_objectid; | ||
604 | __le64 flags; | ||
605 | } __attribute__ ((__packed__)); | ||
606 | |||
607 | struct btrfs_space_info { | ||
608 | u64 flags; | ||
609 | u64 total_bytes; | ||
610 | u64 bytes_used; | ||
611 | u64 bytes_pinned; | ||
612 | u64 bytes_reserved; | ||
613 | u64 bytes_readonly; | ||
614 | int full; | ||
615 | int force_alloc; | ||
616 | struct list_head list; | ||
617 | |||
618 | /* for block groups in our same type */ | ||
619 | struct list_head block_groups; | ||
620 | spinlock_t lock; | ||
621 | struct rw_semaphore groups_sem; | ||
622 | }; | ||
623 | |||
624 | struct btrfs_free_space { | ||
625 | struct rb_node bytes_index; | ||
626 | struct rb_node offset_index; | ||
627 | u64 offset; | ||
628 | u64 bytes; | ||
629 | }; | ||
630 | |||
631 | struct btrfs_block_group_cache { | ||
632 | struct btrfs_key key; | ||
633 | struct btrfs_block_group_item item; | ||
634 | spinlock_t lock; | ||
635 | struct mutex alloc_mutex; | ||
636 | struct mutex cache_mutex; | ||
637 | u64 pinned; | ||
638 | u64 reserved; | ||
639 | u64 flags; | ||
640 | int cached; | ||
641 | int ro; | ||
642 | int dirty; | ||
643 | |||
644 | struct btrfs_space_info *space_info; | ||
645 | |||
646 | /* free space cache stuff */ | ||
647 | struct rb_root free_space_bytes; | ||
648 | struct rb_root free_space_offset; | ||
649 | |||
650 | /* block group cache stuff */ | ||
651 | struct rb_node cache_node; | ||
652 | |||
653 | /* for block groups in the same raid type */ | ||
654 | struct list_head list; | ||
655 | |||
656 | /* usage count */ | ||
657 | atomic_t count; | ||
658 | }; | ||
659 | |||
660 | struct btrfs_leaf_ref_tree { | ||
661 | struct rb_root root; | ||
662 | struct list_head list; | ||
663 | spinlock_t lock; | ||
664 | }; | ||
665 | |||
666 | struct btrfs_device; | ||
667 | struct btrfs_fs_devices; | ||
668 | struct btrfs_fs_info { | ||
669 | u8 fsid[BTRFS_FSID_SIZE]; | ||
670 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; | ||
671 | struct btrfs_root *extent_root; | ||
672 | struct btrfs_root *tree_root; | ||
673 | struct btrfs_root *chunk_root; | ||
674 | struct btrfs_root *dev_root; | ||
675 | struct btrfs_root *fs_root; | ||
676 | struct btrfs_root *csum_root; | ||
677 | |||
678 | /* the log root tree is a directory of all the other log roots */ | ||
679 | struct btrfs_root *log_root_tree; | ||
680 | struct radix_tree_root fs_roots_radix; | ||
681 | |||
682 | /* block group cache stuff */ | ||
683 | spinlock_t block_group_cache_lock; | ||
684 | struct rb_root block_group_cache_tree; | ||
685 | |||
686 | struct extent_io_tree pinned_extents; | ||
687 | struct extent_io_tree pending_del; | ||
688 | struct extent_io_tree extent_ins; | ||
689 | |||
690 | /* logical->physical extent mapping */ | ||
691 | struct btrfs_mapping_tree mapping_tree; | ||
692 | |||
693 | u64 generation; | ||
694 | u64 last_trans_committed; | ||
695 | u64 last_trans_new_blockgroup; | ||
696 | u64 open_ioctl_trans; | ||
697 | unsigned long mount_opt; | ||
698 | u64 max_extent; | ||
699 | u64 max_inline; | ||
700 | u64 alloc_start; | ||
701 | struct btrfs_transaction *running_transaction; | ||
702 | wait_queue_head_t transaction_throttle; | ||
703 | wait_queue_head_t transaction_wait; | ||
704 | |||
705 | wait_queue_head_t async_submit_wait; | ||
706 | wait_queue_head_t tree_log_wait; | ||
707 | |||
708 | struct btrfs_super_block super_copy; | ||
709 | struct btrfs_super_block super_for_commit; | ||
710 | struct block_device *__bdev; | ||
711 | struct super_block *sb; | ||
712 | struct inode *btree_inode; | ||
713 | struct backing_dev_info bdi; | ||
714 | spinlock_t hash_lock; | ||
715 | struct mutex trans_mutex; | ||
716 | struct mutex tree_log_mutex; | ||
717 | struct mutex transaction_kthread_mutex; | ||
718 | struct mutex cleaner_mutex; | ||
719 | struct mutex extent_ins_mutex; | ||
720 | struct mutex pinned_mutex; | ||
721 | struct mutex chunk_mutex; | ||
722 | struct mutex drop_mutex; | ||
723 | struct mutex volume_mutex; | ||
724 | struct mutex tree_reloc_mutex; | ||
725 | struct list_head trans_list; | ||
726 | struct list_head hashers; | ||
727 | struct list_head dead_roots; | ||
728 | |||
729 | atomic_t nr_async_submits; | ||
730 | atomic_t async_submit_draining; | ||
731 | atomic_t nr_async_bios; | ||
732 | atomic_t async_delalloc_pages; | ||
733 | atomic_t tree_log_writers; | ||
734 | atomic_t tree_log_commit; | ||
735 | unsigned long tree_log_batch; | ||
736 | u64 tree_log_transid; | ||
737 | |||
738 | /* | ||
739 | * this is used by the balancing code to wait for all the pending | ||
740 | * ordered extents | ||
741 | */ | ||
742 | spinlock_t ordered_extent_lock; | ||
743 | struct list_head ordered_extents; | ||
744 | struct list_head delalloc_inodes; | ||
745 | |||
746 | /* | ||
747 | * there is a pool of worker threads for checksumming during writes | ||
748 | * and a pool for checksumming after reads. This is because readers | ||
749 | * can run with FS locks held, and the writers may be waiting for | ||
750 | * those locks. We don't want ordering in the pending list to cause | ||
751 | * deadlocks, and so the two are serviced separately. | ||
752 | * | ||
753 | * A third pool does submit_bio to avoid deadlocking with the other | ||
754 | * two | ||
755 | */ | ||
756 | struct btrfs_workers workers; | ||
757 | struct btrfs_workers delalloc_workers; | ||
758 | struct btrfs_workers endio_workers; | ||
759 | struct btrfs_workers endio_meta_workers; | ||
760 | struct btrfs_workers endio_meta_write_workers; | ||
761 | struct btrfs_workers endio_write_workers; | ||
762 | struct btrfs_workers submit_workers; | ||
763 | /* | ||
764 | * fixup workers take dirty pages that didn't properly go through | ||
765 | * the cow mechanism and make them safe to write. It happens | ||
766 | * for the sys_munmap function call path | ||
767 | */ | ||
768 | struct btrfs_workers fixup_workers; | ||
769 | struct task_struct *transaction_kthread; | ||
770 | struct task_struct *cleaner_kthread; | ||
771 | int thread_pool_size; | ||
772 | |||
773 | /* tree relocation relocated fields */ | ||
774 | struct list_head dead_reloc_roots; | ||
775 | struct btrfs_leaf_ref_tree reloc_ref_tree; | ||
776 | struct btrfs_leaf_ref_tree shared_ref_tree; | ||
777 | |||
778 | struct kobject super_kobj; | ||
779 | struct completion kobj_unregister; | ||
780 | int do_barriers; | ||
781 | int closing; | ||
782 | int log_root_recovering; | ||
783 | atomic_t throttles; | ||
784 | atomic_t throttle_gen; | ||
785 | |||
786 | u64 total_pinned; | ||
787 | struct list_head dirty_cowonly_roots; | ||
788 | |||
789 | struct btrfs_fs_devices *fs_devices; | ||
790 | struct list_head space_info; | ||
791 | spinlock_t delalloc_lock; | ||
792 | spinlock_t new_trans_lock; | ||
793 | u64 delalloc_bytes; | ||
794 | u64 last_alloc; | ||
795 | u64 last_data_alloc; | ||
796 | |||
797 | spinlock_t ref_cache_lock; | ||
798 | u64 total_ref_cache_size; | ||
799 | |||
800 | u64 avail_data_alloc_bits; | ||
801 | u64 avail_metadata_alloc_bits; | ||
802 | u64 avail_system_alloc_bits; | ||
803 | u64 data_alloc_profile; | ||
804 | u64 metadata_alloc_profile; | ||
805 | u64 system_alloc_profile; | ||
806 | |||
807 | void *bdev_holder; | ||
808 | }; | ||
809 | |||
810 | /* | ||
811 | * in ram representation of the tree. extent_root is used for all allocations | ||
812 | * and for the extent tree extent_root root. | ||
813 | */ | ||
814 | struct btrfs_dirty_root; | ||
815 | struct btrfs_root { | ||
816 | struct extent_buffer *node; | ||
817 | |||
818 | /* the node lock is held while changing the node pointer */ | ||
819 | spinlock_t node_lock; | ||
820 | |||
821 | struct extent_buffer *commit_root; | ||
822 | struct btrfs_leaf_ref_tree *ref_tree; | ||
823 | struct btrfs_leaf_ref_tree ref_tree_struct; | ||
824 | struct btrfs_dirty_root *dirty_root; | ||
825 | struct btrfs_root *log_root; | ||
826 | struct btrfs_root *reloc_root; | ||
827 | |||
828 | struct btrfs_root_item root_item; | ||
829 | struct btrfs_key root_key; | ||
830 | struct btrfs_fs_info *fs_info; | ||
831 | struct extent_io_tree dirty_log_pages; | ||
832 | |||
833 | struct kobject root_kobj; | ||
834 | struct completion kobj_unregister; | ||
835 | struct mutex objectid_mutex; | ||
836 | struct mutex log_mutex; | ||
837 | |||
838 | u64 objectid; | ||
839 | u64 last_trans; | ||
840 | |||
841 | /* data allocations are done in sectorsize units */ | ||
842 | u32 sectorsize; | ||
843 | |||
844 | /* node allocations are done in nodesize units */ | ||
845 | u32 nodesize; | ||
846 | |||
847 | /* leaf allocations are done in leafsize units */ | ||
848 | u32 leafsize; | ||
849 | |||
850 | u32 stripesize; | ||
851 | |||
852 | u32 type; | ||
853 | u64 highest_inode; | ||
854 | u64 last_inode_alloc; | ||
855 | int ref_cows; | ||
856 | int track_dirty; | ||
857 | u64 defrag_trans_start; | ||
858 | struct btrfs_key defrag_progress; | ||
859 | struct btrfs_key defrag_max; | ||
860 | int defrag_running; | ||
861 | int defrag_level; | ||
862 | char *name; | ||
863 | int in_sysfs; | ||
864 | |||
865 | /* the dirty list is only used by non-reference counted roots */ | ||
866 | struct list_head dirty_list; | ||
867 | |||
868 | spinlock_t list_lock; | ||
869 | struct list_head dead_list; | ||
870 | struct list_head orphan_list; | ||
871 | |||
872 | /* | ||
873 | * right now this just gets used so that a root has its own devid | ||
874 | * for stat. It may be used for more later | ||
875 | */ | ||
876 | struct super_block anon_super; | ||
877 | }; | ||
878 | |||
879 | /* | ||
880 | |||
881 | * inode items have the data typically returned from stat and store other | ||
882 | * info about object characteristics. There is one for every file and dir in | ||
883 | * the FS | ||
884 | */ | ||
885 | #define BTRFS_INODE_ITEM_KEY 1 | ||
886 | #define BTRFS_INODE_REF_KEY 12 | ||
887 | #define BTRFS_XATTR_ITEM_KEY 24 | ||
888 | #define BTRFS_ORPHAN_ITEM_KEY 48 | ||
889 | /* reserve 2-15 close to the inode for later flexibility */ | ||
890 | |||
891 | /* | ||
892 | * dir items are the name -> inode pointers in a directory. There is one | ||
893 | * for every name in a directory. | ||
894 | */ | ||
895 | #define BTRFS_DIR_LOG_ITEM_KEY 60 | ||
896 | #define BTRFS_DIR_LOG_INDEX_KEY 72 | ||
897 | #define BTRFS_DIR_ITEM_KEY 84 | ||
898 | #define BTRFS_DIR_INDEX_KEY 96 | ||
899 | /* | ||
900 | * extent data is for file data | ||
901 | */ | ||
902 | #define BTRFS_EXTENT_DATA_KEY 108 | ||
903 | |||
904 | /* | ||
905 | * extent csums are stored in a separate tree and hold csums for | ||
906 | * an entire extent on disk. | ||
907 | */ | ||
908 | #define BTRFS_EXTENT_CSUM_KEY 128 | ||
909 | |||
910 | /* | ||
911 | * root items point to tree roots. There are typically in the root | ||
912 | * tree used by the super block to find all the other trees | ||
913 | */ | ||
914 | #define BTRFS_ROOT_ITEM_KEY 132 | ||
915 | |||
916 | /* | ||
917 | * root backrefs tie subvols and snapshots to the directory entries that | ||
918 | * reference them | ||
919 | */ | ||
920 | #define BTRFS_ROOT_BACKREF_KEY 144 | ||
921 | |||
922 | /* | ||
923 | * root refs make a fast index for listing all of the snapshots and | ||
924 | * subvolumes referenced by a given root. They point directly to the | ||
925 | * directory item in the root that references the subvol | ||
926 | */ | ||
927 | #define BTRFS_ROOT_REF_KEY 156 | ||
928 | |||
929 | /* | ||
930 | * extent items are in the extent map tree. These record which blocks | ||
931 | * are used, and how many references there are to each block | ||
932 | */ | ||
933 | #define BTRFS_EXTENT_ITEM_KEY 168 | ||
934 | #define BTRFS_EXTENT_REF_KEY 180 | ||
935 | |||
936 | /* | ||
937 | * block groups give us hints into the extent allocation trees. Which | ||
938 | * blocks are free etc etc | ||
939 | */ | ||
940 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 192 | ||
941 | |||
942 | #define BTRFS_DEV_EXTENT_KEY 204 | ||
943 | #define BTRFS_DEV_ITEM_KEY 216 | ||
944 | #define BTRFS_CHUNK_ITEM_KEY 228 | ||
945 | |||
946 | /* | ||
947 | * string items are for debugging. They just store a short string of | ||
948 | * data in the FS | ||
949 | */ | ||
950 | #define BTRFS_STRING_ITEM_KEY 253 | ||
951 | |||
952 | #define BTRFS_MOUNT_NODATASUM (1 << 0) | ||
953 | #define BTRFS_MOUNT_NODATACOW (1 << 1) | ||
954 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) | ||
955 | #define BTRFS_MOUNT_SSD (1 << 3) | ||
956 | #define BTRFS_MOUNT_DEGRADED (1 << 4) | ||
957 | #define BTRFS_MOUNT_COMPRESS (1 << 5) | ||
958 | |||
959 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) | ||
960 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) | ||
961 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ | ||
962 | BTRFS_MOUNT_##opt) | ||
963 | /* | ||
964 | * Inode flags | ||
965 | */ | ||
966 | #define BTRFS_INODE_NODATASUM (1 << 0) | ||
967 | #define BTRFS_INODE_NODATACOW (1 << 1) | ||
968 | #define BTRFS_INODE_READONLY (1 << 2) | ||
969 | #define BTRFS_INODE_NOCOMPRESS (1 << 3) | ||
970 | #define BTRFS_INODE_PREALLOC (1 << 4) | ||
971 | #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \ | ||
972 | ~BTRFS_INODE_##flag) | ||
973 | #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \ | ||
974 | BTRFS_INODE_##flag) | ||
975 | #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \ | ||
976 | BTRFS_INODE_##flag) | ||
977 | /* some macros to generate set/get funcs for the struct fields. This | ||
978 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | ||
979 | * one for u8: | ||
980 | */ | ||
981 | #define le8_to_cpu(v) (v) | ||
982 | #define cpu_to_le8(v) (v) | ||
983 | #define __le8 u8 | ||
984 | |||
985 | #define read_eb_member(eb, ptr, type, member, result) ( \ | ||
986 | read_extent_buffer(eb, (char *)(result), \ | ||
987 | ((unsigned long)(ptr)) + \ | ||
988 | offsetof(type, member), \ | ||
989 | sizeof(((type *)0)->member))) | ||
990 | |||
991 | #define write_eb_member(eb, ptr, type, member, result) ( \ | ||
992 | write_extent_buffer(eb, (char *)(result), \ | ||
993 | ((unsigned long)(ptr)) + \ | ||
994 | offsetof(type, member), \ | ||
995 | sizeof(((type *)0)->member))) | ||
996 | |||
997 | #ifndef BTRFS_SETGET_FUNCS | ||
998 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ | ||
999 | u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ | ||
1000 | void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); | ||
1001 | #endif | ||
1002 | |||
1003 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | ||
1004 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | ||
1005 | { \ | ||
1006 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ | ||
1007 | u##bits res = le##bits##_to_cpu(p->member); \ | ||
1008 | kunmap_atomic(p, KM_USER0); \ | ||
1009 | return res; \ | ||
1010 | } \ | ||
1011 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | ||
1012 | u##bits val) \ | ||
1013 | { \ | ||
1014 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ | ||
1015 | p->member = cpu_to_le##bits(val); \ | ||
1016 | kunmap_atomic(p, KM_USER0); \ | ||
1017 | } | ||
1018 | |||
1019 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ | ||
1020 | static inline u##bits btrfs_##name(type *s) \ | ||
1021 | { \ | ||
1022 | return le##bits##_to_cpu(s->member); \ | ||
1023 | } \ | ||
1024 | static inline void btrfs_set_##name(type *s, u##bits val) \ | ||
1025 | { \ | ||
1026 | s->member = cpu_to_le##bits(val); \ | ||
1027 | } | ||
1028 | |||
1029 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); | ||
1030 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); | ||
1031 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); | ||
1032 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); | ||
1033 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); | ||
1034 | BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, | ||
1035 | start_offset, 64); | ||
1036 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); | ||
1037 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); | ||
1038 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); | ||
1039 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); | ||
1040 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); | ||
1041 | BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); | ||
1042 | |||
1043 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); | ||
1044 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, | ||
1045 | total_bytes, 64); | ||
1046 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, | ||
1047 | bytes_used, 64); | ||
1048 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, | ||
1049 | io_align, 32); | ||
1050 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, | ||
1051 | io_width, 32); | ||
1052 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, | ||
1053 | sector_size, 32); | ||
1054 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); | ||
1055 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, | ||
1056 | dev_group, 32); | ||
1057 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, | ||
1058 | seek_speed, 8); | ||
1059 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, | ||
1060 | bandwidth, 8); | ||
1061 | BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, | ||
1062 | generation, 64); | ||
1063 | |||
1064 | static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) | ||
1065 | { | ||
1066 | return (char *)d + offsetof(struct btrfs_dev_item, uuid); | ||
1067 | } | ||
1068 | |||
1069 | static inline char *btrfs_device_fsid(struct btrfs_dev_item *d) | ||
1070 | { | ||
1071 | return (char *)d + offsetof(struct btrfs_dev_item, fsid); | ||
1072 | } | ||
1073 | |||
1074 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); | ||
1075 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); | ||
1076 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); | ||
1077 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); | ||
1078 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); | ||
1079 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); | ||
1080 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); | ||
1081 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); | ||
1082 | BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); | ||
1083 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); | ||
1084 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); | ||
1085 | |||
1086 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) | ||
1087 | { | ||
1088 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); | ||
1089 | } | ||
1090 | |||
1091 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); | ||
1092 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); | ||
1093 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, | ||
1094 | stripe_len, 64); | ||
1095 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, | ||
1096 | io_align, 32); | ||
1097 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, | ||
1098 | io_width, 32); | ||
1099 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, | ||
1100 | sector_size, 32); | ||
1101 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); | ||
1102 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, | ||
1103 | num_stripes, 16); | ||
1104 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, | ||
1105 | sub_stripes, 16); | ||
1106 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); | ||
1107 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); | ||
1108 | |||
1109 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, | ||
1110 | int nr) | ||
1111 | { | ||
1112 | unsigned long offset = (unsigned long)c; | ||
1113 | offset += offsetof(struct btrfs_chunk, stripe); | ||
1114 | offset += nr * sizeof(struct btrfs_stripe); | ||
1115 | return (struct btrfs_stripe *)offset; | ||
1116 | } | ||
1117 | |||
1118 | static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) | ||
1119 | { | ||
1120 | return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); | ||
1121 | } | ||
1122 | |||
1123 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, | ||
1124 | struct btrfs_chunk *c, int nr) | ||
1125 | { | ||
1126 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); | ||
1127 | } | ||
1128 | |||
1129 | static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, | ||
1130 | struct btrfs_chunk *c, int nr, | ||
1131 | u64 val) | ||
1132 | { | ||
1133 | btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); | ||
1134 | } | ||
1135 | |||
1136 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, | ||
1137 | struct btrfs_chunk *c, int nr) | ||
1138 | { | ||
1139 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); | ||
1140 | } | ||
1141 | |||
1142 | static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, | ||
1143 | struct btrfs_chunk *c, int nr, | ||
1144 | u64 val) | ||
1145 | { | ||
1146 | btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); | ||
1147 | } | ||
1148 | |||
1149 | /* struct btrfs_block_group_item */ | ||
1150 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | ||
1151 | used, 64); | ||
1152 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | ||
1153 | used, 64); | ||
1154 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, | ||
1155 | struct btrfs_block_group_item, chunk_objectid, 64); | ||
1156 | |||
1157 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, | ||
1158 | struct btrfs_block_group_item, chunk_objectid, 64); | ||
1159 | BTRFS_SETGET_FUNCS(disk_block_group_flags, | ||
1160 | struct btrfs_block_group_item, flags, 64); | ||
1161 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, | ||
1162 | struct btrfs_block_group_item, flags, 64); | ||
1163 | |||
1164 | /* struct btrfs_inode_ref */ | ||
1165 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); | ||
1166 | BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); | ||
1167 | |||
1168 | /* struct btrfs_inode_item */ | ||
1169 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | ||
1170 | BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); | ||
1171 | BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); | ||
1172 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); | ||
1173 | BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); | ||
1174 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); | ||
1175 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | ||
1176 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | ||
1177 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | ||
1178 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | ||
1179 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); | ||
1180 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); | ||
1181 | |||
1182 | static inline struct btrfs_timespec * | ||
1183 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) | ||
1184 | { | ||
1185 | unsigned long ptr = (unsigned long)inode_item; | ||
1186 | ptr += offsetof(struct btrfs_inode_item, atime); | ||
1187 | return (struct btrfs_timespec *)ptr; | ||
1188 | } | ||
1189 | |||
1190 | static inline struct btrfs_timespec * | ||
1191 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) | ||
1192 | { | ||
1193 | unsigned long ptr = (unsigned long)inode_item; | ||
1194 | ptr += offsetof(struct btrfs_inode_item, mtime); | ||
1195 | return (struct btrfs_timespec *)ptr; | ||
1196 | } | ||
1197 | |||
1198 | static inline struct btrfs_timespec * | ||
1199 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) | ||
1200 | { | ||
1201 | unsigned long ptr = (unsigned long)inode_item; | ||
1202 | ptr += offsetof(struct btrfs_inode_item, ctime); | ||
1203 | return (struct btrfs_timespec *)ptr; | ||
1204 | } | ||
1205 | |||
1206 | static inline struct btrfs_timespec * | ||
1207 | btrfs_inode_otime(struct btrfs_inode_item *inode_item) | ||
1208 | { | ||
1209 | unsigned long ptr = (unsigned long)inode_item; | ||
1210 | ptr += offsetof(struct btrfs_inode_item, otime); | ||
1211 | return (struct btrfs_timespec *)ptr; | ||
1212 | } | ||
1213 | |||
1214 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); | ||
1215 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); | ||
1216 | |||
1217 | /* struct btrfs_dev_extent */ | ||
1218 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, | ||
1219 | chunk_tree, 64); | ||
1220 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, | ||
1221 | chunk_objectid, 64); | ||
1222 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, | ||
1223 | chunk_offset, 64); | ||
1224 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); | ||
1225 | |||
1226 | static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) | ||
1227 | { | ||
1228 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); | ||
1229 | return (u8 *)((unsigned long)dev + ptr); | ||
1230 | } | ||
1231 | |||
1232 | /* struct btrfs_extent_ref */ | ||
1233 | BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64); | ||
1234 | BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64); | ||
1235 | BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64); | ||
1236 | BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32); | ||
1237 | |||
1238 | BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64); | ||
1239 | BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref, | ||
1240 | generation, 64); | ||
1241 | BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref, | ||
1242 | objectid, 64); | ||
1243 | BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref, | ||
1244 | num_refs, 32); | ||
1245 | |||
1246 | /* struct btrfs_extent_item */ | ||
1247 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32); | ||
1248 | BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, | ||
1249 | refs, 32); | ||
1250 | |||
1251 | /* struct btrfs_node */ | ||
1252 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | ||
1253 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); | ||
1254 | |||
1255 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) | ||
1256 | { | ||
1257 | unsigned long ptr; | ||
1258 | ptr = offsetof(struct btrfs_node, ptrs) + | ||
1259 | sizeof(struct btrfs_key_ptr) * nr; | ||
1260 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | ||
1261 | } | ||
1262 | |||
1263 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, | ||
1264 | int nr, u64 val) | ||
1265 | { | ||
1266 | unsigned long ptr; | ||
1267 | ptr = offsetof(struct btrfs_node, ptrs) + | ||
1268 | sizeof(struct btrfs_key_ptr) * nr; | ||
1269 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | ||
1270 | } | ||
1271 | |||
1272 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) | ||
1273 | { | ||
1274 | unsigned long ptr; | ||
1275 | ptr = offsetof(struct btrfs_node, ptrs) + | ||
1276 | sizeof(struct btrfs_key_ptr) * nr; | ||
1277 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); | ||
1278 | } | ||
1279 | |||
1280 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, | ||
1281 | int nr, u64 val) | ||
1282 | { | ||
1283 | unsigned long ptr; | ||
1284 | ptr = offsetof(struct btrfs_node, ptrs) + | ||
1285 | sizeof(struct btrfs_key_ptr) * nr; | ||
1286 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); | ||
1287 | } | ||
1288 | |||
1289 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) | ||
1290 | { | ||
1291 | return offsetof(struct btrfs_node, ptrs) + | ||
1292 | sizeof(struct btrfs_key_ptr) * nr; | ||
1293 | } | ||
1294 | |||
1295 | void btrfs_node_key(struct extent_buffer *eb, | ||
1296 | struct btrfs_disk_key *disk_key, int nr); | ||
1297 | |||
1298 | static inline void btrfs_set_node_key(struct extent_buffer *eb, | ||
1299 | struct btrfs_disk_key *disk_key, int nr) | ||
1300 | { | ||
1301 | unsigned long ptr; | ||
1302 | ptr = btrfs_node_key_ptr_offset(nr); | ||
1303 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | ||
1304 | struct btrfs_key_ptr, key, disk_key); | ||
1305 | } | ||
1306 | |||
1307 | /* struct btrfs_item */ | ||
1308 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | ||
1309 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | ||
1310 | |||
1311 | static inline unsigned long btrfs_item_nr_offset(int nr) | ||
1312 | { | ||
1313 | return offsetof(struct btrfs_leaf, items) + | ||
1314 | sizeof(struct btrfs_item) * nr; | ||
1315 | } | ||
1316 | |||
1317 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, | ||
1318 | int nr) | ||
1319 | { | ||
1320 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); | ||
1321 | } | ||
1322 | |||
1323 | static inline u32 btrfs_item_end(struct extent_buffer *eb, | ||
1324 | struct btrfs_item *item) | ||
1325 | { | ||
1326 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); | ||
1327 | } | ||
1328 | |||
1329 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) | ||
1330 | { | ||
1331 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); | ||
1332 | } | ||
1333 | |||
1334 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) | ||
1335 | { | ||
1336 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); | ||
1337 | } | ||
1338 | |||
1339 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) | ||
1340 | { | ||
1341 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); | ||
1342 | } | ||
1343 | |||
1344 | static inline void btrfs_item_key(struct extent_buffer *eb, | ||
1345 | struct btrfs_disk_key *disk_key, int nr) | ||
1346 | { | ||
1347 | struct btrfs_item *item = btrfs_item_nr(eb, nr); | ||
1348 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); | ||
1349 | } | ||
1350 | |||
1351 | static inline void btrfs_set_item_key(struct extent_buffer *eb, | ||
1352 | struct btrfs_disk_key *disk_key, int nr) | ||
1353 | { | ||
1354 | struct btrfs_item *item = btrfs_item_nr(eb, nr); | ||
1355 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); | ||
1356 | } | ||
1357 | |||
1358 | BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); | ||
1359 | |||
1360 | /* | ||
1361 | * struct btrfs_root_ref | ||
1362 | */ | ||
1363 | BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); | ||
1364 | BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); | ||
1365 | BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); | ||
1366 | |||
1367 | /* struct btrfs_dir_item */ | ||
1368 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); | ||
1369 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); | ||
1370 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | ||
1371 | BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); | ||
1372 | |||
1373 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, | ||
1374 | struct btrfs_dir_item *item, | ||
1375 | struct btrfs_disk_key *key) | ||
1376 | { | ||
1377 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); | ||
1378 | } | ||
1379 | |||
1380 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, | ||
1381 | struct btrfs_dir_item *item, | ||
1382 | struct btrfs_disk_key *key) | ||
1383 | { | ||
1384 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); | ||
1385 | } | ||
1386 | |||
1387 | /* struct btrfs_disk_key */ | ||
1388 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | ||
1389 | objectid, 64); | ||
1390 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | ||
1391 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | ||
1392 | |||
1393 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, | ||
1394 | struct btrfs_disk_key *disk) | ||
1395 | { | ||
1396 | cpu->offset = le64_to_cpu(disk->offset); | ||
1397 | cpu->type = disk->type; | ||
1398 | cpu->objectid = le64_to_cpu(disk->objectid); | ||
1399 | } | ||
1400 | |||
1401 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | ||
1402 | struct btrfs_key *cpu) | ||
1403 | { | ||
1404 | disk->offset = cpu_to_le64(cpu->offset); | ||
1405 | disk->type = cpu->type; | ||
1406 | disk->objectid = cpu_to_le64(cpu->objectid); | ||
1407 | } | ||
1408 | |||
1409 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, | ||
1410 | struct btrfs_key *key, int nr) | ||
1411 | { | ||
1412 | struct btrfs_disk_key disk_key; | ||
1413 | btrfs_node_key(eb, &disk_key, nr); | ||
1414 | btrfs_disk_key_to_cpu(key, &disk_key); | ||
1415 | } | ||
1416 | |||
1417 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, | ||
1418 | struct btrfs_key *key, int nr) | ||
1419 | { | ||
1420 | struct btrfs_disk_key disk_key; | ||
1421 | btrfs_item_key(eb, &disk_key, nr); | ||
1422 | btrfs_disk_key_to_cpu(key, &disk_key); | ||
1423 | } | ||
1424 | |||
1425 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, | ||
1426 | struct btrfs_dir_item *item, | ||
1427 | struct btrfs_key *key) | ||
1428 | { | ||
1429 | struct btrfs_disk_key disk_key; | ||
1430 | btrfs_dir_item_key(eb, item, &disk_key); | ||
1431 | btrfs_disk_key_to_cpu(key, &disk_key); | ||
1432 | } | ||
1433 | |||
1434 | |||
1435 | static inline u8 btrfs_key_type(struct btrfs_key *key) | ||
1436 | { | ||
1437 | return key->type; | ||
1438 | } | ||
1439 | |||
1440 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) | ||
1441 | { | ||
1442 | key->type = val; | ||
1443 | } | ||
1444 | |||
1445 | /* struct btrfs_header */ | ||
1446 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); | ||
1447 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, | ||
1448 | generation, 64); | ||
1449 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | ||
1450 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | ||
1451 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); | ||
1452 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); | ||
1453 | |||
1454 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) | ||
1455 | { | ||
1456 | return (btrfs_header_flags(eb) & flag) == flag; | ||
1457 | } | ||
1458 | |||
1459 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) | ||
1460 | { | ||
1461 | u64 flags = btrfs_header_flags(eb); | ||
1462 | btrfs_set_header_flags(eb, flags | flag); | ||
1463 | return (flags & flag) == flag; | ||
1464 | } | ||
1465 | |||
1466 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) | ||
1467 | { | ||
1468 | u64 flags = btrfs_header_flags(eb); | ||
1469 | btrfs_set_header_flags(eb, flags & ~flag); | ||
1470 | return (flags & flag) == flag; | ||
1471 | } | ||
1472 | |||
1473 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) | ||
1474 | { | ||
1475 | unsigned long ptr = offsetof(struct btrfs_header, fsid); | ||
1476 | return (u8 *)ptr; | ||
1477 | } | ||
1478 | |||
1479 | static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) | ||
1480 | { | ||
1481 | unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid); | ||
1482 | return (u8 *)ptr; | ||
1483 | } | ||
1484 | |||
1485 | static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) | ||
1486 | { | ||
1487 | unsigned long ptr = offsetof(struct btrfs_super_block, fsid); | ||
1488 | return (u8 *)ptr; | ||
1489 | } | ||
1490 | |||
1491 | static inline u8 *btrfs_header_csum(struct extent_buffer *eb) | ||
1492 | { | ||
1493 | unsigned long ptr = offsetof(struct btrfs_header, csum); | ||
1494 | return (u8 *)ptr; | ||
1495 | } | ||
1496 | |||
1497 | static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) | ||
1498 | { | ||
1499 | return NULL; | ||
1500 | } | ||
1501 | |||
1502 | static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) | ||
1503 | { | ||
1504 | return NULL; | ||
1505 | } | ||
1506 | |||
1507 | static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) | ||
1508 | { | ||
1509 | return NULL; | ||
1510 | } | ||
1511 | |||
1512 | static inline int btrfs_is_leaf(struct extent_buffer *eb) | ||
1513 | { | ||
1514 | return btrfs_header_level(eb) == 0; | ||
1515 | } | ||
1516 | |||
1517 | /* struct btrfs_root_item */ | ||
1518 | BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, | ||
1519 | generation, 64); | ||
1520 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); | ||
1521 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); | ||
1522 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); | ||
1523 | |||
1524 | BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, | ||
1525 | generation, 64); | ||
1526 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); | ||
1527 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); | ||
1528 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); | ||
1529 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | ||
1530 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); | ||
1531 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); | ||
1532 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); | ||
1533 | BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, | ||
1534 | last_snapshot, 64); | ||
1535 | |||
1536 | /* struct btrfs_super_block */ | ||
1537 | |||
1538 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); | ||
1539 | BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); | ||
1540 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, | ||
1541 | generation, 64); | ||
1542 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | ||
1543 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, | ||
1544 | struct btrfs_super_block, sys_chunk_array_size, 32); | ||
1545 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, | ||
1546 | struct btrfs_super_block, chunk_root_generation, 64); | ||
1547 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, | ||
1548 | root_level, 8); | ||
1549 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, | ||
1550 | chunk_root, 64); | ||
1551 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, | ||
1552 | chunk_root_level, 8); | ||
1553 | BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, | ||
1554 | log_root, 64); | ||
1555 | BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, | ||
1556 | log_root_transid, 64); | ||
1557 | BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, | ||
1558 | log_root_level, 8); | ||
1559 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, | ||
1560 | total_bytes, 64); | ||
1561 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, | ||
1562 | bytes_used, 64); | ||
1563 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, | ||
1564 | sectorsize, 32); | ||
1565 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | ||
1566 | nodesize, 32); | ||
1567 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, | ||
1568 | leafsize, 32); | ||
1569 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, | ||
1570 | stripesize, 32); | ||
1571 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, | ||
1572 | root_dir_objectid, 64); | ||
1573 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, | ||
1574 | num_devices, 64); | ||
1575 | BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, | ||
1576 | compat_flags, 64); | ||
1577 | BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, | ||
1578 | compat_flags, 64); | ||
1579 | BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, | ||
1580 | incompat_flags, 64); | ||
1581 | BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, | ||
1582 | csum_type, 16); | ||
1583 | |||
1584 | static inline int btrfs_super_csum_size(struct btrfs_super_block *s) | ||
1585 | { | ||
1586 | int t = btrfs_super_csum_type(s); | ||
1587 | BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes)); | ||
1588 | return btrfs_csum_sizes[t]; | ||
1589 | } | ||
1590 | |||
1591 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) | ||
1592 | { | ||
1593 | return offsetof(struct btrfs_leaf, items); | ||
1594 | } | ||
1595 | |||
1596 | /* struct btrfs_file_extent_item */ | ||
1597 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | ||
1598 | |||
1599 | static inline unsigned long | ||
1600 | btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) | ||
1601 | { | ||
1602 | unsigned long offset = (unsigned long)e; | ||
1603 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); | ||
1604 | return offset; | ||
1605 | } | ||
1606 | |||
1607 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | ||
1608 | { | ||
1609 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; | ||
1610 | } | ||
1611 | |||
1612 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, | ||
1613 | disk_bytenr, 64); | ||
1614 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, | ||
1615 | generation, 64); | ||
1616 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, | ||
1617 | disk_num_bytes, 64); | ||
1618 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, | ||
1619 | offset, 64); | ||
1620 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, | ||
1621 | num_bytes, 64); | ||
1622 | BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, | ||
1623 | ram_bytes, 64); | ||
1624 | BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, | ||
1625 | compression, 8); | ||
1626 | BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, | ||
1627 | encryption, 8); | ||
1628 | BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, | ||
1629 | other_encoding, 16); | ||
1630 | |||
1631 | /* this returns the number of file bytes represented by the inline item. | ||
1632 | * If an item is compressed, this is the uncompressed size | ||
1633 | */ | ||
1634 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, | ||
1635 | struct btrfs_file_extent_item *e) | ||
1636 | { | ||
1637 | return btrfs_file_extent_ram_bytes(eb, e); | ||
1638 | } | ||
1639 | |||
1640 | /* | ||
1641 | * this returns the number of bytes used by the item on disk, minus the | ||
1642 | * size of any extent headers. If a file is compressed on disk, this is | ||
1643 | * the compressed size | ||
1644 | */ | ||
1645 | static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, | ||
1646 | struct btrfs_item *e) | ||
1647 | { | ||
1648 | unsigned long offset; | ||
1649 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); | ||
1650 | return btrfs_item_size(eb, e) - offset; | ||
1651 | } | ||
1652 | |||
1653 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) | ||
1654 | { | ||
1655 | return sb->s_fs_info; | ||
1656 | } | ||
1657 | |||
1658 | static inline int btrfs_set_root_name(struct btrfs_root *root, | ||
1659 | const char *name, int len) | ||
1660 | { | ||
1661 | /* if we already have a name just free it */ | ||
1662 | kfree(root->name); | ||
1663 | |||
1664 | root->name = kmalloc(len+1, GFP_KERNEL); | ||
1665 | if (!root->name) | ||
1666 | return -ENOMEM; | ||
1667 | |||
1668 | memcpy(root->name, name, len); | ||
1669 | root->name[len] = '\0'; | ||
1670 | |||
1671 | return 0; | ||
1672 | } | ||
1673 | |||
1674 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) | ||
1675 | { | ||
1676 | if (level == 0) | ||
1677 | return root->leafsize; | ||
1678 | return root->nodesize; | ||
1679 | } | ||
1680 | |||
1681 | /* helper function to cast into the data area of the leaf. */ | ||
1682 | #define btrfs_item_ptr(leaf, slot, type) \ | ||
1683 | ((type *)(btrfs_leaf_data(leaf) + \ | ||
1684 | btrfs_item_offset_nr(leaf, slot))) | ||
1685 | |||
1686 | #define btrfs_item_ptr_offset(leaf, slot) \ | ||
1687 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | ||
1688 | btrfs_item_offset_nr(leaf, slot))) | ||
1689 | |||
1690 | static inline struct dentry *fdentry(struct file *file) | ||
1691 | { | ||
1692 | return file->f_path.dentry; | ||
1693 | } | ||
1694 | |||
1695 | /* extent-tree.c */ | ||
1696 | int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len); | ||
1697 | int btrfs_lookup_extent_ref(struct btrfs_trans_handle *trans, | ||
1698 | struct btrfs_root *root, u64 bytenr, | ||
1699 | u64 num_bytes, u32 *refs); | ||
1700 | int btrfs_update_pinned_extents(struct btrfs_root *root, | ||
1701 | u64 bytenr, u64 num, int pin); | ||
1702 | int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans, | ||
1703 | struct btrfs_root *root, struct extent_buffer *leaf); | ||
1704 | int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, | ||
1705 | struct btrfs_root *root, u64 objectid, u64 bytenr); | ||
1706 | int btrfs_extent_post_op(struct btrfs_trans_handle *trans, | ||
1707 | struct btrfs_root *root); | ||
1708 | int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy); | ||
1709 | struct btrfs_block_group_cache *btrfs_lookup_block_group( | ||
1710 | struct btrfs_fs_info *info, | ||
1711 | u64 bytenr); | ||
1712 | u64 btrfs_find_block_group(struct btrfs_root *root, | ||
1713 | u64 search_start, u64 search_hint, int owner); | ||
1714 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, | ||
1715 | struct btrfs_root *root, | ||
1716 | u32 blocksize, u64 parent, | ||
1717 | u64 root_objectid, | ||
1718 | u64 ref_generation, | ||
1719 | int level, | ||
1720 | u64 hint, | ||
1721 | u64 empty_size); | ||
1722 | struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans, | ||
1723 | struct btrfs_root *root, | ||
1724 | u64 bytenr, u32 blocksize); | ||
1725 | int btrfs_alloc_extent(struct btrfs_trans_handle *trans, | ||
1726 | struct btrfs_root *root, | ||
1727 | u64 num_bytes, u64 parent, u64 min_bytes, | ||
1728 | u64 root_objectid, u64 ref_generation, | ||
1729 | u64 owner, u64 empty_size, u64 hint_byte, | ||
1730 | u64 search_end, struct btrfs_key *ins, u64 data); | ||
1731 | int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans, | ||
1732 | struct btrfs_root *root, u64 parent, | ||
1733 | u64 root_objectid, u64 ref_generation, | ||
1734 | u64 owner, struct btrfs_key *ins); | ||
1735 | int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans, | ||
1736 | struct btrfs_root *root, u64 parent, | ||
1737 | u64 root_objectid, u64 ref_generation, | ||
1738 | u64 owner, struct btrfs_key *ins); | ||
1739 | int btrfs_reserve_extent(struct btrfs_trans_handle *trans, | ||
1740 | struct btrfs_root *root, | ||
1741 | u64 num_bytes, u64 min_alloc_size, | ||
1742 | u64 empty_size, u64 hint_byte, | ||
1743 | u64 search_end, struct btrfs_key *ins, | ||
1744 | u64 data); | ||
1745 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, | ||
1746 | struct extent_buffer *orig_buf, struct extent_buffer *buf, | ||
1747 | u32 *nr_extents); | ||
1748 | int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, | ||
1749 | struct extent_buffer *buf, u32 nr_extents); | ||
1750 | int btrfs_update_ref(struct btrfs_trans_handle *trans, | ||
1751 | struct btrfs_root *root, struct extent_buffer *orig_buf, | ||
1752 | struct extent_buffer *buf, int start_slot, int nr); | ||
1753 | int btrfs_free_extent(struct btrfs_trans_handle *trans, | ||
1754 | struct btrfs_root *root, | ||
1755 | u64 bytenr, u64 num_bytes, u64 parent, | ||
1756 | u64 root_objectid, u64 ref_generation, | ||
1757 | u64 owner_objectid, int pin); | ||
1758 | int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len); | ||
1759 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, | ||
1760 | struct btrfs_root *root, | ||
1761 | struct extent_io_tree *unpin); | ||
1762 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, | ||
1763 | struct btrfs_root *root, | ||
1764 | u64 bytenr, u64 num_bytes, u64 parent, | ||
1765 | u64 root_objectid, u64 ref_generation, | ||
1766 | u64 owner_objectid); | ||
1767 | int btrfs_update_extent_ref(struct btrfs_trans_handle *trans, | ||
1768 | struct btrfs_root *root, u64 bytenr, | ||
1769 | u64 orig_parent, u64 parent, | ||
1770 | u64 root_objectid, u64 ref_generation, | ||
1771 | u64 owner_objectid); | ||
1772 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, | ||
1773 | struct btrfs_root *root); | ||
1774 | int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr); | ||
1775 | int btrfs_free_block_groups(struct btrfs_fs_info *info); | ||
1776 | int btrfs_read_block_groups(struct btrfs_root *root); | ||
1777 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, | ||
1778 | struct btrfs_root *root, u64 bytes_used, | ||
1779 | u64 type, u64 chunk_objectid, u64 chunk_offset, | ||
1780 | u64 size); | ||
1781 | int btrfs_remove_block_group(struct btrfs_trans_handle *trans, | ||
1782 | struct btrfs_root *root, u64 group_start); | ||
1783 | int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start); | ||
1784 | int btrfs_free_reloc_root(struct btrfs_trans_handle *trans, | ||
1785 | struct btrfs_root *root); | ||
1786 | int btrfs_drop_dead_reloc_roots(struct btrfs_root *root); | ||
1787 | int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans, | ||
1788 | struct btrfs_root *root, | ||
1789 | struct extent_buffer *buf, u64 orig_start); | ||
1790 | int btrfs_add_dead_reloc_root(struct btrfs_root *root); | ||
1791 | int btrfs_cleanup_reloc_trees(struct btrfs_root *root); | ||
1792 | int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); | ||
1793 | u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags); | ||
1794 | /* ctree.c */ | ||
1795 | int btrfs_previous_item(struct btrfs_root *root, | ||
1796 | struct btrfs_path *path, u64 min_objectid, | ||
1797 | int type); | ||
1798 | int btrfs_merge_path(struct btrfs_trans_handle *trans, | ||
1799 | struct btrfs_root *root, | ||
1800 | struct btrfs_key *node_keys, | ||
1801 | u64 *nodes, int lowest_level); | ||
1802 | int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, | ||
1803 | struct btrfs_root *root, struct btrfs_path *path, | ||
1804 | struct btrfs_key *new_key); | ||
1805 | struct extent_buffer *btrfs_root_node(struct btrfs_root *root); | ||
1806 | struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); | ||
1807 | int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, | ||
1808 | struct btrfs_key *key, int lowest_level, | ||
1809 | int cache_only, u64 min_trans); | ||
1810 | int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, | ||
1811 | struct btrfs_key *max_key, | ||
1812 | struct btrfs_path *path, int cache_only, | ||
1813 | u64 min_trans); | ||
1814 | int btrfs_cow_block(struct btrfs_trans_handle *trans, | ||
1815 | struct btrfs_root *root, struct extent_buffer *buf, | ||
1816 | struct extent_buffer *parent, int parent_slot, | ||
1817 | struct extent_buffer **cow_ret, u64 prealloc_dest); | ||
1818 | int btrfs_copy_root(struct btrfs_trans_handle *trans, | ||
1819 | struct btrfs_root *root, | ||
1820 | struct extent_buffer *buf, | ||
1821 | struct extent_buffer **cow_ret, u64 new_root_objectid); | ||
1822 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root | ||
1823 | *root, struct btrfs_path *path, u32 data_size); | ||
1824 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, | ||
1825 | struct btrfs_root *root, | ||
1826 | struct btrfs_path *path, | ||
1827 | u32 new_size, int from_end); | ||
1828 | int btrfs_split_item(struct btrfs_trans_handle *trans, | ||
1829 | struct btrfs_root *root, | ||
1830 | struct btrfs_path *path, | ||
1831 | struct btrfs_key *new_key, | ||
1832 | unsigned long split_offset); | ||
1833 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root | ||
1834 | *root, struct btrfs_key *key, struct btrfs_path *p, int | ||
1835 | ins_len, int cow); | ||
1836 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, | ||
1837 | struct btrfs_root *root, struct extent_buffer *parent, | ||
1838 | int start_slot, int cache_only, u64 *last_ret, | ||
1839 | struct btrfs_key *progress); | ||
1840 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); | ||
1841 | struct btrfs_path *btrfs_alloc_path(void); | ||
1842 | void btrfs_free_path(struct btrfs_path *p); | ||
1843 | void btrfs_init_path(struct btrfs_path *p); | ||
1844 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, | ||
1845 | struct btrfs_path *path, int slot, int nr); | ||
1846 | int btrfs_del_leaf(struct btrfs_trans_handle *trans, | ||
1847 | struct btrfs_root *root, | ||
1848 | struct btrfs_path *path, u64 bytenr); | ||
1849 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, | ||
1850 | struct btrfs_root *root, | ||
1851 | struct btrfs_path *path) | ||
1852 | { | ||
1853 | return btrfs_del_items(trans, root, path, path->slots[0], 1); | ||
1854 | } | ||
1855 | |||
1856 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root | ||
1857 | *root, struct btrfs_key *key, void *data, u32 data_size); | ||
1858 | int btrfs_insert_some_items(struct btrfs_trans_handle *trans, | ||
1859 | struct btrfs_root *root, | ||
1860 | struct btrfs_path *path, | ||
1861 | struct btrfs_key *cpu_key, u32 *data_size, | ||
1862 | int nr); | ||
1863 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, | ||
1864 | struct btrfs_root *root, | ||
1865 | struct btrfs_path *path, | ||
1866 | struct btrfs_key *cpu_key, u32 *data_size, int nr); | ||
1867 | |||
1868 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, | ||
1869 | struct btrfs_root *root, | ||
1870 | struct btrfs_path *path, | ||
1871 | struct btrfs_key *key, | ||
1872 | u32 data_size) | ||
1873 | { | ||
1874 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); | ||
1875 | } | ||
1876 | |||
1877 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); | ||
1878 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); | ||
1879 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); | ||
1880 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root | ||
1881 | *root); | ||
1882 | int btrfs_drop_subtree(struct btrfs_trans_handle *trans, | ||
1883 | struct btrfs_root *root, | ||
1884 | struct extent_buffer *node, | ||
1885 | struct extent_buffer *parent); | ||
1886 | /* root-item.c */ | ||
1887 | int btrfs_find_root_ref(struct btrfs_root *tree_root, | ||
1888 | struct btrfs_path *path, | ||
1889 | u64 root_id, u64 ref_id); | ||
1890 | int btrfs_add_root_ref(struct btrfs_trans_handle *trans, | ||
1891 | struct btrfs_root *tree_root, | ||
1892 | u64 root_id, u8 type, u64 ref_id, | ||
1893 | u64 dirid, u64 sequence, | ||
1894 | const char *name, int name_len); | ||
1895 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, | ||
1896 | struct btrfs_key *key); | ||
1897 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | ||
1898 | *root, struct btrfs_key *key, struct btrfs_root_item | ||
1899 | *item); | ||
1900 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root | ||
1901 | *root, struct btrfs_key *key, struct btrfs_root_item | ||
1902 | *item); | ||
1903 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct | ||
1904 | btrfs_root_item *item, struct btrfs_key *key); | ||
1905 | int btrfs_search_root(struct btrfs_root *root, u64 search_start, | ||
1906 | u64 *found_objectid); | ||
1907 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid, | ||
1908 | struct btrfs_root *latest_root); | ||
1909 | /* dir-item.c */ | ||
1910 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, | ||
1911 | struct btrfs_root *root, const char *name, | ||
1912 | int name_len, u64 dir, | ||
1913 | struct btrfs_key *location, u8 type, u64 index); | ||
1914 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, | ||
1915 | struct btrfs_root *root, | ||
1916 | struct btrfs_path *path, u64 dir, | ||
1917 | const char *name, int name_len, | ||
1918 | int mod); | ||
1919 | struct btrfs_dir_item * | ||
1920 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | ||
1921 | struct btrfs_root *root, | ||
1922 | struct btrfs_path *path, u64 dir, | ||
1923 | u64 objectid, const char *name, int name_len, | ||
1924 | int mod); | ||
1925 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, | ||
1926 | struct btrfs_path *path, | ||
1927 | const char *name, int name_len); | ||
1928 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, | ||
1929 | struct btrfs_root *root, | ||
1930 | struct btrfs_path *path, | ||
1931 | struct btrfs_dir_item *di); | ||
1932 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, | ||
1933 | struct btrfs_root *root, const char *name, | ||
1934 | u16 name_len, const void *data, u16 data_len, | ||
1935 | u64 dir); | ||
1936 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, | ||
1937 | struct btrfs_root *root, | ||
1938 | struct btrfs_path *path, u64 dir, | ||
1939 | const char *name, u16 name_len, | ||
1940 | int mod); | ||
1941 | |||
1942 | /* orphan.c */ | ||
1943 | int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, | ||
1944 | struct btrfs_root *root, u64 offset); | ||
1945 | int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, | ||
1946 | struct btrfs_root *root, u64 offset); | ||
1947 | |||
1948 | /* inode-map.c */ | ||
1949 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, | ||
1950 | struct btrfs_root *fs_root, | ||
1951 | u64 dirid, u64 *objectid); | ||
1952 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); | ||
1953 | |||
1954 | /* inode-item.c */ | ||
1955 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, | ||
1956 | struct btrfs_root *root, | ||
1957 | const char *name, int name_len, | ||
1958 | u64 inode_objectid, u64 ref_objectid, u64 index); | ||
1959 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, | ||
1960 | struct btrfs_root *root, | ||
1961 | const char *name, int name_len, | ||
1962 | u64 inode_objectid, u64 ref_objectid, u64 *index); | ||
1963 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, | ||
1964 | struct btrfs_root *root, | ||
1965 | struct btrfs_path *path, u64 objectid); | ||
1966 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root | ||
1967 | *root, struct btrfs_path *path, | ||
1968 | struct btrfs_key *location, int mod); | ||
1969 | |||
1970 | /* file-item.c */ | ||
1971 | int btrfs_del_csums(struct btrfs_trans_handle *trans, | ||
1972 | struct btrfs_root *root, u64 bytenr, u64 len); | ||
1973 | int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, | ||
1974 | struct bio *bio, u32 *dst); | ||
1975 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, | ||
1976 | struct btrfs_root *root, | ||
1977 | u64 objectid, u64 pos, | ||
1978 | u64 disk_offset, u64 disk_num_bytes, | ||
1979 | u64 num_bytes, u64 offset, u64 ram_bytes, | ||
1980 | u8 compression, u8 encryption, u16 other_encoding); | ||
1981 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, | ||
1982 | struct btrfs_root *root, | ||
1983 | struct btrfs_path *path, u64 objectid, | ||
1984 | u64 bytenr, int mod); | ||
1985 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, | ||
1986 | struct btrfs_root *root, | ||
1987 | struct btrfs_ordered_sum *sums); | ||
1988 | int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, | ||
1989 | struct bio *bio, u64 file_start, int contig); | ||
1990 | int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode, | ||
1991 | u64 start, unsigned long len); | ||
1992 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, | ||
1993 | struct btrfs_root *root, | ||
1994 | struct btrfs_path *path, | ||
1995 | u64 bytenr, int cow); | ||
1996 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, | ||
1997 | struct btrfs_root *root, struct btrfs_path *path, | ||
1998 | u64 isize); | ||
1999 | int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, | ||
2000 | u64 end, struct list_head *list); | ||
2001 | /* inode.c */ | ||
2002 | |||
2003 | /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ | ||
2004 | #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) | ||
2005 | #define ClearPageChecked ClearPageFsMisc | ||
2006 | #define SetPageChecked SetPageFsMisc | ||
2007 | #define PageChecked PageFsMisc | ||
2008 | #endif | ||
2009 | |||
2010 | struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); | ||
2011 | int btrfs_set_inode_index(struct inode *dir, u64 *index); | ||
2012 | int btrfs_unlink_inode(struct btrfs_trans_handle *trans, | ||
2013 | struct btrfs_root *root, | ||
2014 | struct inode *dir, struct inode *inode, | ||
2015 | const char *name, int name_len); | ||
2016 | int btrfs_add_link(struct btrfs_trans_handle *trans, | ||
2017 | struct inode *parent_inode, struct inode *inode, | ||
2018 | const char *name, int name_len, int add_backref, u64 index); | ||
2019 | int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, | ||
2020 | struct btrfs_root *root, | ||
2021 | struct inode *inode, u64 new_size, | ||
2022 | u32 min_type); | ||
2023 | |||
2024 | int btrfs_start_delalloc_inodes(struct btrfs_root *root); | ||
2025 | int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end); | ||
2026 | int btrfs_writepages(struct address_space *mapping, | ||
2027 | struct writeback_control *wbc); | ||
2028 | int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, | ||
2029 | struct btrfs_root *new_root, struct dentry *dentry, | ||
2030 | u64 new_dirid, u64 alloc_hint); | ||
2031 | int btrfs_merge_bio_hook(struct page *page, unsigned long offset, | ||
2032 | size_t size, struct bio *bio, unsigned long bio_flags); | ||
2033 | |||
2034 | unsigned long btrfs_force_ra(struct address_space *mapping, | ||
2035 | struct file_ra_state *ra, struct file *file, | ||
2036 | pgoff_t offset, pgoff_t last_index); | ||
2037 | int btrfs_check_free_space(struct btrfs_root *root, u64 num_required, | ||
2038 | int for_del); | ||
2039 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page); | ||
2040 | int btrfs_readpage(struct file *file, struct page *page); | ||
2041 | void btrfs_delete_inode(struct inode *inode); | ||
2042 | void btrfs_put_inode(struct inode *inode); | ||
2043 | void btrfs_read_locked_inode(struct inode *inode); | ||
2044 | int btrfs_write_inode(struct inode *inode, int wait); | ||
2045 | void btrfs_dirty_inode(struct inode *inode); | ||
2046 | struct inode *btrfs_alloc_inode(struct super_block *sb); | ||
2047 | void btrfs_destroy_inode(struct inode *inode); | ||
2048 | int btrfs_init_cachep(void); | ||
2049 | void btrfs_destroy_cachep(void); | ||
2050 | long btrfs_ioctl_trans_end(struct file *file); | ||
2051 | struct inode *btrfs_ilookup(struct super_block *s, u64 objectid, | ||
2052 | struct btrfs_root *root, int wait); | ||
2053 | struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid, | ||
2054 | struct btrfs_root *root); | ||
2055 | struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, | ||
2056 | struct btrfs_root *root, int *is_new); | ||
2057 | int btrfs_commit_write(struct file *file, struct page *page, | ||
2058 | unsigned from, unsigned to); | ||
2059 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, | ||
2060 | size_t page_offset, u64 start, u64 end, | ||
2061 | int create); | ||
2062 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | ||
2063 | struct btrfs_root *root, | ||
2064 | struct inode *inode); | ||
2065 | int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode); | ||
2066 | int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode); | ||
2067 | void btrfs_orphan_cleanup(struct btrfs_root *root); | ||
2068 | int btrfs_cont_expand(struct inode *inode, loff_t size); | ||
2069 | |||
2070 | /* ioctl.c */ | ||
2071 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); | ||
2072 | |||
2073 | /* file.c */ | ||
2074 | int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync); | ||
2075 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, | ||
2076 | int skip_pinned); | ||
2077 | int btrfs_check_file(struct btrfs_root *root, struct inode *inode); | ||
2078 | extern struct file_operations btrfs_file_operations; | ||
2079 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, | ||
2080 | struct btrfs_root *root, struct inode *inode, | ||
2081 | u64 start, u64 end, u64 inline_limit, u64 *hint_block); | ||
2082 | int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, | ||
2083 | struct btrfs_root *root, | ||
2084 | struct inode *inode, u64 start, u64 end); | ||
2085 | int btrfs_release_file(struct inode *inode, struct file *file); | ||
2086 | |||
2087 | /* tree-defrag.c */ | ||
2088 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | ||
2089 | struct btrfs_root *root, int cache_only); | ||
2090 | |||
2091 | /* sysfs.c */ | ||
2092 | int btrfs_init_sysfs(void); | ||
2093 | void btrfs_exit_sysfs(void); | ||
2094 | int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); | ||
2095 | int btrfs_sysfs_add_root(struct btrfs_root *root); | ||
2096 | void btrfs_sysfs_del_root(struct btrfs_root *root); | ||
2097 | void btrfs_sysfs_del_super(struct btrfs_fs_info *root); | ||
2098 | |||
2099 | /* xattr.c */ | ||
2100 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | ||
2101 | |||
2102 | /* super.c */ | ||
2103 | u64 btrfs_parse_size(char *str); | ||
2104 | int btrfs_parse_options(struct btrfs_root *root, char *options); | ||
2105 | int btrfs_sync_fs(struct super_block *sb, int wait); | ||
2106 | |||
2107 | /* acl.c */ | ||
2108 | int btrfs_check_acl(struct inode *inode, int mask); | ||
2109 | int btrfs_init_acl(struct inode *inode, struct inode *dir); | ||
2110 | int btrfs_acl_chmod(struct inode *inode); | ||
2111 | |||
2112 | /* free-space-cache.c */ | ||
2113 | int btrfs_add_free_space(struct btrfs_block_group_cache *block_group, | ||
2114 | u64 bytenr, u64 size); | ||
2115 | int btrfs_add_free_space_lock(struct btrfs_block_group_cache *block_group, | ||
2116 | u64 offset, u64 bytes); | ||
2117 | int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group, | ||
2118 | u64 bytenr, u64 size); | ||
2119 | int btrfs_remove_free_space_lock(struct btrfs_block_group_cache *block_group, | ||
2120 | u64 offset, u64 bytes); | ||
2121 | void btrfs_remove_free_space_cache(struct btrfs_block_group_cache | ||
2122 | *block_group); | ||
2123 | struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache | ||
2124 | *block_group, u64 offset, | ||
2125 | u64 bytes); | ||
2126 | void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group, | ||
2127 | u64 bytes); | ||
2128 | u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group); | ||
2129 | #endif | ||