]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - fs/btrfs/ctree.h
Btrfs: Fix hole insertion corner cases
[mirror_ubuntu-artful-kernel.git] / fs / btrfs / ctree.h
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/workqueue.h>
27 #include <linux/completion.h>
28 #include <asm/kmap_types.h>
29 #include "bit-radix.h"
30 #include "extent_map.h"
31
32 struct btrfs_trans_handle;
33 struct btrfs_transaction;
34 extern struct kmem_cache *btrfs_trans_handle_cachep;
35 extern struct kmem_cache *btrfs_transaction_cachep;
36 extern struct kmem_cache *btrfs_bit_radix_cachep;
37 extern struct kmem_cache *btrfs_path_cachep;
38
39 #define BTRFS_MAGIC "_B3RfS_M"
40
41 #define BTRFS_MAX_LEVEL 8
42 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
43 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
44 #define BTRFS_FS_TREE_OBJECTID 3ULL
45 #define BTRFS_ROOT_TREE_DIR_OBJECTID 4ULL
46 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
47
48 /*
49 * we can actually store much bigger names, but lets not confuse the rest
50 * of linux
51 */
52 #define BTRFS_NAME_LEN 255
53
54 /* 32 bytes in various csum fields */
55 #define BTRFS_CSUM_SIZE 32
56 /* four bytes for CRC32 */
57 #define BTRFS_CRC32_SIZE 4
58 #define BTRFS_EMPTY_DIR_SIZE 0
59
60 #define BTRFS_FT_UNKNOWN 0
61 #define BTRFS_FT_REG_FILE 1
62 #define BTRFS_FT_DIR 2
63 #define BTRFS_FT_CHRDEV 3
64 #define BTRFS_FT_BLKDEV 4
65 #define BTRFS_FT_FIFO 5
66 #define BTRFS_FT_SOCK 6
67 #define BTRFS_FT_SYMLINK 7
68 #define BTRFS_FT_XATTR 8
69 #define BTRFS_FT_MAX 9
70
71 /*
72 * the key defines the order in the tree, and so it also defines (optimal)
73 * block layout. objectid corresonds to the inode number. The flags
74 * tells us things about the object, and is a kind of stream selector.
75 * so for a given inode, keys with flags of 1 might refer to the inode
76 * data, flags of 2 may point to file data in the btree and flags == 3
77 * may point to extents.
78 *
79 * offset is the starting byte offset for this key in the stream.
80 *
81 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
82 * in cpu native order. Otherwise they are identical and their sizes
83 * should be the same (ie both packed)
84 */
85 struct btrfs_disk_key {
86 __le64 objectid;
87 u8 type;
88 __le64 offset;
89 } __attribute__ ((__packed__));
90
91 struct btrfs_key {
92 u64 objectid;
93 u8 type;
94 u64 offset;
95 } __attribute__ ((__packed__));
96
97 #define BTRFS_FSID_SIZE 16
98 /*
99 * every tree block (leaf or node) starts with this header.
100 */
101 struct btrfs_header {
102 u8 csum[BTRFS_CSUM_SIZE];
103 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
104 __le64 bytenr; /* which block this node is supposed to live in */
105 __le64 generation;
106 __le64 owner;
107 __le32 nritems;
108 __le16 flags;
109 u8 level;
110 } __attribute__ ((__packed__));
111
112 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
113 sizeof(struct btrfs_header)) / \
114 sizeof(struct btrfs_key_ptr))
115 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
116 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
117 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
118 sizeof(struct btrfs_item) - \
119 sizeof(struct btrfs_file_extent_item))
120
121 /*
122 * the super block basically lists the main trees of the FS
123 * it currently lacks any block count etc etc
124 */
125 struct btrfs_super_block {
126 u8 csum[BTRFS_CSUM_SIZE];
127 /* the first 3 fields must match struct btrfs_header */
128 u8 fsid[16]; /* FS specific uuid */
129 __le64 bytenr; /* this block number */
130 __le64 magic;
131 __le64 generation;
132 __le64 root;
133 __le64 total_bytes;
134 __le64 bytes_used;
135 __le64 root_dir_objectid;
136 __le32 sectorsize;
137 __le32 nodesize;
138 __le32 leafsize;
139 __le32 stripesize;
140 u8 root_level;
141 } __attribute__ ((__packed__));
142
143 /*
144 * A leaf is full of items. offset and size tell us where to find
145 * the item in the leaf (relative to the start of the data area)
146 */
147 struct btrfs_item {
148 struct btrfs_disk_key key;
149 __le32 offset;
150 __le32 size;
151 } __attribute__ ((__packed__));
152
153 /*
154 * leaves have an item area and a data area:
155 * [item0, item1....itemN] [free space] [dataN...data1, data0]
156 *
157 * The data is separate from the items to get the keys closer together
158 * during searches.
159 */
160 struct btrfs_leaf {
161 struct btrfs_header header;
162 struct btrfs_item items[];
163 } __attribute__ ((__packed__));
164
165 /*
166 * all non-leaf blocks are nodes, they hold only keys and pointers to
167 * other blocks
168 */
169 struct btrfs_key_ptr {
170 struct btrfs_disk_key key;
171 __le64 blockptr;
172 __le64 generation;
173 } __attribute__ ((__packed__));
174
175 struct btrfs_node {
176 struct btrfs_header header;
177 struct btrfs_key_ptr ptrs[];
178 } __attribute__ ((__packed__));
179
180 /*
181 * btrfs_paths remember the path taken from the root down to the leaf.
182 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
183 * to any other levels that are present.
184 *
185 * The slots array records the index of the item or block pointer
186 * used while walking the tree.
187 */
188 struct btrfs_path {
189 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
190 int slots[BTRFS_MAX_LEVEL];
191 int reada;
192 int lowest_level;
193 };
194
195 /*
196 * items in the extent btree are used to record the objectid of the
197 * owner of the block and the number of references
198 */
199 struct btrfs_extent_item {
200 __le32 refs;
201 } __attribute__ ((__packed__));
202
203 struct btrfs_extent_ref {
204 __le64 root;
205 __le64 generation;
206 __le64 objectid;
207 __le64 offset;
208 } __attribute__ ((__packed__));
209
210 struct btrfs_inode_ref {
211 __le16 name_len;
212 /* name goes here */
213 } __attribute__ ((__packed__));
214
215 struct btrfs_inode_timespec {
216 __le64 sec;
217 __le32 nsec;
218 } __attribute__ ((__packed__));
219
220 /*
221 * there is no padding here on purpose. If you want to extent the inode,
222 * make a new item type
223 */
224 struct btrfs_inode_item {
225 __le64 generation;
226 __le64 size;
227 __le64 nblocks;
228 __le64 block_group;
229 __le32 nlink;
230 __le32 uid;
231 __le32 gid;
232 __le32 mode;
233 __le32 rdev;
234 __le16 flags;
235 __le16 compat_flags;
236 struct btrfs_inode_timespec atime;
237 struct btrfs_inode_timespec ctime;
238 struct btrfs_inode_timespec mtime;
239 struct btrfs_inode_timespec otime;
240 } __attribute__ ((__packed__));
241
242 struct btrfs_dir_item {
243 struct btrfs_disk_key location;
244 __le16 data_len;
245 __le16 name_len;
246 u8 type;
247 } __attribute__ ((__packed__));
248
249 struct btrfs_root_item {
250 struct btrfs_inode_item inode;
251 __le64 root_dirid;
252 __le64 bytenr;
253 __le64 byte_limit;
254 __le64 bytes_used;
255 __le32 flags;
256 __le32 refs;
257 struct btrfs_disk_key drop_progress;
258 u8 drop_level;
259 u8 level;
260 } __attribute__ ((__packed__));
261
262 #define BTRFS_FILE_EXTENT_REG 0
263 #define BTRFS_FILE_EXTENT_INLINE 1
264
265 struct btrfs_file_extent_item {
266 __le64 generation;
267 u8 type;
268 /*
269 * disk space consumed by the extent, checksum blocks are included
270 * in these numbers
271 */
272 __le64 disk_bytenr;
273 __le64 disk_num_bytes;
274 /*
275 * the logical offset in file blocks (no csums)
276 * this extent record is for. This allows a file extent to point
277 * into the middle of an existing extent on disk, sharing it
278 * between two snapshots (useful if some bytes in the middle of the
279 * extent have changed
280 */
281 __le64 offset;
282 /*
283 * the logical number of file blocks (no csums included)
284 */
285 __le64 num_bytes;
286 } __attribute__ ((__packed__));
287
288 struct btrfs_csum_item {
289 u8 csum;
290 } __attribute__ ((__packed__));
291
292 /* tag for the radix tree of block groups in ram */
293 #define BTRFS_BLOCK_GROUP_SIZE (256 * 1024 * 1024)
294
295
296 #define BTRFS_BLOCK_GROUP_DATA 1
297 #define BTRFS_BLOCK_GROUP_MIXED 2
298
299 struct btrfs_block_group_item {
300 __le64 used;
301 u8 flags;
302 } __attribute__ ((__packed__));
303
304 struct btrfs_block_group_cache {
305 struct btrfs_key key;
306 struct btrfs_block_group_item item;
307 int data;
308 int cached;
309 u64 pinned;
310 };
311 struct btrfs_fs_info {
312 u8 fsid[BTRFS_FSID_SIZE];
313 struct btrfs_root *extent_root;
314 struct btrfs_root *tree_root;
315 struct radix_tree_root fs_roots_radix;
316
317 struct extent_map_tree free_space_cache;
318 struct extent_map_tree block_group_cache;
319 struct extent_map_tree pinned_extents;
320 struct extent_map_tree pending_del;
321 struct extent_map_tree extent_ins;
322
323 u64 generation;
324 u64 last_trans_committed;
325 unsigned long mount_opt;
326 u64 max_extent;
327 u64 alloc_start;
328 struct btrfs_transaction *running_transaction;
329 struct btrfs_super_block super_copy;
330 struct extent_buffer *sb_buffer;
331 struct super_block *sb;
332 struct inode *btree_inode;
333 spinlock_t hash_lock;
334 struct mutex trans_mutex;
335 struct mutex fs_mutex;
336 struct list_head trans_list;
337 struct list_head hashers;
338 struct list_head dead_roots;
339 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
340 struct work_struct trans_work;
341 #else
342 struct delayed_work trans_work;
343 #endif
344 struct kobject super_kobj;
345 struct completion kobj_unregister;
346 int do_barriers;
347 int closing;
348 unsigned long throttles;
349
350 u64 total_pinned;
351 spinlock_t delalloc_lock;
352 spinlock_t new_trans_lock;
353 u64 delalloc_bytes;
354 u64 last_alloc;
355 };
356 /*
357 * in ram representation of the tree. extent_root is used for all allocations
358 * and for the extent tree extent_root root.
359 */
360 struct btrfs_root {
361 struct extent_buffer *node;
362 struct extent_buffer *commit_root;
363 struct btrfs_root_item root_item;
364 struct btrfs_key root_key;
365 struct btrfs_fs_info *fs_info;
366 struct inode *inode;
367 struct kobject root_kobj;
368 struct completion kobj_unregister;
369 u64 objectid;
370 u64 last_trans;
371
372 /* data allocations are done in sectorsize units */
373 u32 sectorsize;
374
375 /* node allocations are done in nodesize units */
376 u32 nodesize;
377
378 /* leaf allocations are done in leafsize units */
379 u32 leafsize;
380
381 u32 stripesize;
382
383 u32 type;
384 u64 highest_inode;
385 u64 last_inode_alloc;
386 int ref_cows;
387 struct btrfs_key defrag_progress;
388 int defrag_running;
389 int defrag_level;
390 char *name;
391 int in_sysfs;
392 };
393
394 /*
395 * inode items have the data typically returned from stat and store other
396 * info about object characteristics. There is one for every file and dir in
397 * the FS
398 */
399 #define BTRFS_INODE_ITEM_KEY 1
400 #define BTRFS_INODE_REF_KEY 2
401 #define BTRFS_XATTR_ITEM_KEY 8
402 /* reserve 2-15 close to the inode for later flexibility */
403
404 /*
405 * dir items are the name -> inode pointers in a directory. There is one
406 * for every name in a directory.
407 */
408 #define BTRFS_DIR_ITEM_KEY 16
409 #define BTRFS_DIR_INDEX_KEY 17
410 /*
411 * extent data is for file data
412 */
413 #define BTRFS_EXTENT_DATA_KEY 18
414 /*
415 * csum items have the checksums for data in the extents
416 */
417 #define BTRFS_CSUM_ITEM_KEY 19
418
419 /* reserve 20-31 for other file stuff */
420
421 /*
422 * root items point to tree roots. There are typically in the root
423 * tree used by the super block to find all the other trees
424 */
425 #define BTRFS_ROOT_ITEM_KEY 32
426 /*
427 * extent items are in the extent map tree. These record which blocks
428 * are used, and how many references there are to each block
429 */
430 #define BTRFS_EXTENT_ITEM_KEY 33
431 #define BTRFS_EXTENT_REF_KEY 34
432
433 /*
434 * block groups give us hints into the extent allocation trees. Which
435 * blocks are free etc etc
436 */
437 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
438
439 /*
440 * string items are for debugging. They just store a short string of
441 * data in the FS
442 */
443 #define BTRFS_STRING_ITEM_KEY 253
444
445 #define BTRFS_MOUNT_NODATASUM (1 << 0)
446 #define BTRFS_MOUNT_NODATACOW (1 << 1)
447 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
448 #define BTRFS_MOUNT_SSD (1 << 3)
449
450 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
451 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
452 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
453 BTRFS_MOUNT_##opt)
454 /*
455 * Inode flags
456 */
457 #define BTRFS_INODE_NODATASUM (1 << 0)
458 #define BTRFS_INODE_NODATACOW (1 << 1)
459 #define BTRFS_INODE_READONLY (1 << 2)
460 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
461 ~BTRFS_INODE_##flag)
462 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
463 BTRFS_INODE_##flag)
464 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
465 BTRFS_INODE_##flag)
466 /* some macros to generate set/get funcs for the struct fields. This
467 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
468 * one for u8:
469 */
470 #define le8_to_cpu(v) (v)
471 #define cpu_to_le8(v) (v)
472 #define __le8 u8
473
474 #define read_eb_member(eb, ptr, type, member, result) ( \
475 read_extent_buffer(eb, (char *)(result), \
476 ((unsigned long)(ptr)) + \
477 offsetof(type, member), \
478 sizeof(((type *)0)->member)))
479
480 #define write_eb_member(eb, ptr, type, member, result) ( \
481 write_extent_buffer(eb, (char *)(result), \
482 ((unsigned long)(ptr)) + \
483 offsetof(type, member), \
484 sizeof(((type *)0)->member)))
485
486 #ifndef BTRFS_SETGET_FUNCS
487 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
488 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
489 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
490 #endif
491
492 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
493 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
494 { \
495 char *kaddr = kmap_atomic(eb->first_page, KM_USER0); \
496 unsigned long offset = offsetof(type, member); \
497 u##bits res; \
498 __le##bits *tmp = (__le##bits *)(kaddr + offset); \
499 res = le##bits##_to_cpu(*tmp); \
500 kunmap_atomic(kaddr, KM_USER0); \
501 return res; \
502 } \
503 static inline void btrfs_set_##name(struct extent_buffer *eb, \
504 u##bits val) \
505 { \
506 char *kaddr = kmap_atomic(eb->first_page, KM_USER0); \
507 unsigned long offset = offsetof(type, member); \
508 __le##bits *tmp = (__le##bits *)(kaddr + offset); \
509 *tmp = cpu_to_le##bits(val); \
510 kunmap_atomic(kaddr, KM_USER0); \
511 }
512
513 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
514 static inline u##bits btrfs_##name(type *s) \
515 { \
516 return le##bits##_to_cpu(s->member); \
517 } \
518 static inline void btrfs_set_##name(type *s, u##bits val) \
519 { \
520 s->member = cpu_to_le##bits(val); \
521 }
522
523 /* struct btrfs_block_group_item */
524 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
525 used, 64);
526 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
527 used, 64);
528 BTRFS_SETGET_FUNCS(disk_block_group_flags, struct btrfs_block_group_item,
529 flags, 8);
530
531 /* struct btrfs_inode_ref */
532 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
533
534 /* struct btrfs_inode_item */
535 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
536 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
537 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
538 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
539 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
540 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
541 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
542 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
543 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 32);
544 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
545 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
546 compat_flags, 16);
547
548 static inline struct btrfs_inode_timespec *
549 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
550 {
551 unsigned long ptr = (unsigned long)inode_item;
552 ptr += offsetof(struct btrfs_inode_item, atime);
553 return (struct btrfs_inode_timespec *)ptr;
554 }
555
556 static inline struct btrfs_inode_timespec *
557 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
558 {
559 unsigned long ptr = (unsigned long)inode_item;
560 ptr += offsetof(struct btrfs_inode_item, mtime);
561 return (struct btrfs_inode_timespec *)ptr;
562 }
563
564 static inline struct btrfs_inode_timespec *
565 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
566 {
567 unsigned long ptr = (unsigned long)inode_item;
568 ptr += offsetof(struct btrfs_inode_item, ctime);
569 return (struct btrfs_inode_timespec *)ptr;
570 }
571
572 static inline struct btrfs_inode_timespec *
573 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
574 {
575 unsigned long ptr = (unsigned long)inode_item;
576 ptr += offsetof(struct btrfs_inode_item, otime);
577 return (struct btrfs_inode_timespec *)ptr;
578 }
579
580 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_inode_timespec, sec, 64);
581 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_inode_timespec, nsec, 32);
582
583 /* struct btrfs_extent_item */
584 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
585
586 /* struct btrfs_extent_ref */
587 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
588 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
589 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
590 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
591
592 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
593 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
594 generation, 64);
595 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
596 objectid, 64);
597 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
598
599 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
600 refs, 32);
601
602 /* struct btrfs_node */
603 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
604 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
605
606 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
607 {
608 unsigned long ptr;
609 ptr = offsetof(struct btrfs_node, ptrs) +
610 sizeof(struct btrfs_key_ptr) * nr;
611 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
612 }
613
614 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
615 int nr, u64 val)
616 {
617 unsigned long ptr;
618 ptr = offsetof(struct btrfs_node, ptrs) +
619 sizeof(struct btrfs_key_ptr) * nr;
620 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
621 }
622
623 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
624 {
625 unsigned long ptr;
626 ptr = offsetof(struct btrfs_node, ptrs) +
627 sizeof(struct btrfs_key_ptr) * nr;
628 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
629 }
630
631 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
632 int nr, u64 val)
633 {
634 unsigned long ptr;
635 ptr = offsetof(struct btrfs_node, ptrs) +
636 sizeof(struct btrfs_key_ptr) * nr;
637 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
638 }
639
640 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
641 {
642 return offsetof(struct btrfs_node, ptrs) +
643 sizeof(struct btrfs_key_ptr) * nr;
644 }
645
646 void btrfs_node_key(struct extent_buffer *eb,
647 struct btrfs_disk_key *disk_key, int nr);
648
649 static inline void btrfs_set_node_key(struct extent_buffer *eb,
650 struct btrfs_disk_key *disk_key, int nr)
651 {
652 unsigned long ptr;
653 ptr = btrfs_node_key_ptr_offset(nr);
654 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
655 struct btrfs_key_ptr, key, disk_key);
656 }
657
658 /* struct btrfs_item */
659 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
660 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
661
662 static inline unsigned long btrfs_item_nr_offset(int nr)
663 {
664 return offsetof(struct btrfs_leaf, items) +
665 sizeof(struct btrfs_item) * nr;
666 }
667
668 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
669 int nr)
670 {
671 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
672 }
673
674 static inline u32 btrfs_item_end(struct extent_buffer *eb,
675 struct btrfs_item *item)
676 {
677 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
678 }
679
680 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
681 {
682 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
683 }
684
685 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
686 {
687 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
688 }
689
690 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
691 {
692 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
693 }
694
695 static inline void btrfs_item_key(struct extent_buffer *eb,
696 struct btrfs_disk_key *disk_key, int nr)
697 {
698 struct btrfs_item *item = btrfs_item_nr(eb, nr);
699 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
700 }
701
702 static inline void btrfs_set_item_key(struct extent_buffer *eb,
703 struct btrfs_disk_key *disk_key, int nr)
704 {
705 struct btrfs_item *item = btrfs_item_nr(eb, nr);
706 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
707 }
708
709 /* struct btrfs_dir_item */
710 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
711 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
712 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
713
714 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
715 struct btrfs_dir_item *item,
716 struct btrfs_disk_key *key)
717 {
718 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
719 }
720
721 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
722 struct btrfs_dir_item *item,
723 struct btrfs_disk_key *key)
724 {
725 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
726 }
727
728 /* struct btrfs_disk_key */
729 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
730 objectid, 64);
731 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
732 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
733
734 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
735 struct btrfs_disk_key *disk)
736 {
737 cpu->offset = le64_to_cpu(disk->offset);
738 cpu->type = disk->type;
739 cpu->objectid = le64_to_cpu(disk->objectid);
740 }
741
742 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
743 struct btrfs_key *cpu)
744 {
745 disk->offset = cpu_to_le64(cpu->offset);
746 disk->type = cpu->type;
747 disk->objectid = cpu_to_le64(cpu->objectid);
748 }
749
750 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
751 struct btrfs_key *key, int nr)
752 {
753 struct btrfs_disk_key disk_key;
754 btrfs_node_key(eb, &disk_key, nr);
755 btrfs_disk_key_to_cpu(key, &disk_key);
756 }
757
758 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
759 struct btrfs_key *key, int nr)
760 {
761 struct btrfs_disk_key disk_key;
762 btrfs_item_key(eb, &disk_key, nr);
763 btrfs_disk_key_to_cpu(key, &disk_key);
764 }
765
766 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
767 struct btrfs_dir_item *item,
768 struct btrfs_key *key)
769 {
770 struct btrfs_disk_key disk_key;
771 btrfs_dir_item_key(eb, item, &disk_key);
772 btrfs_disk_key_to_cpu(key, &disk_key);
773 }
774
775
776 static inline u8 btrfs_key_type(struct btrfs_key *key)
777 {
778 return key->type;
779 }
780
781 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
782 {
783 key->type = val;
784 }
785
786 /* struct btrfs_header */
787 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
788 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
789 generation, 64);
790 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
791 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
792 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 16);
793 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
794
795 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
796 {
797 unsigned long ptr = offsetof(struct btrfs_header, fsid);
798 return (u8 *)ptr;
799 }
800
801 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
802 {
803 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
804 return (u8 *)ptr;
805 }
806
807 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
808 {
809 unsigned long ptr = offsetof(struct btrfs_header, csum);
810 return (u8 *)ptr;
811 }
812
813 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
814 {
815 return NULL;
816 }
817
818 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
819 {
820 return NULL;
821 }
822
823 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
824 {
825 return NULL;
826 }
827
828 static inline int btrfs_is_leaf(struct extent_buffer *eb)
829 {
830 return (btrfs_header_level(eb) == 0);
831 }
832
833 /* struct btrfs_root_item */
834 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
835 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
836 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
837
838 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
839 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
840 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
841 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
842 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
843 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
844 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
845
846 /* struct btrfs_super_block */
847 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
848 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
849 generation, 64);
850 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
851 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
852 root_level, 8);
853 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
854 total_bytes, 64);
855 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
856 bytes_used, 64);
857 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
858 sectorsize, 32);
859 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
860 nodesize, 32);
861 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
862 leafsize, 32);
863 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
864 stripesize, 32);
865 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
866 root_dir_objectid, 64);
867
868 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
869 {
870 return offsetof(struct btrfs_leaf, items);
871 }
872
873 /* struct btrfs_file_extent_item */
874 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
875
876 static inline unsigned long btrfs_file_extent_inline_start(struct
877 btrfs_file_extent_item *e)
878 {
879 unsigned long offset = (unsigned long)e;
880 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
881 return offset;
882 }
883
884 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
885 {
886 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
887 }
888
889 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
890 struct btrfs_item *e)
891 {
892 unsigned long offset;
893 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
894 return btrfs_item_size(eb, e) - offset;
895 }
896
897 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
898 disk_bytenr, 64);
899 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
900 generation, 64);
901 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
902 disk_num_bytes, 64);
903 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
904 offset, 64);
905 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
906 num_bytes, 64);
907
908 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
909 {
910 return sb->s_fs_info;
911 }
912
913 static inline int btrfs_set_root_name(struct btrfs_root *root,
914 const char *name, int len)
915 {
916 /* if we already have a name just free it */
917 if (root->name)
918 kfree(root->name);
919
920 root->name = kmalloc(len+1, GFP_KERNEL);
921 if (!root->name)
922 return -ENOMEM;
923
924 memcpy(root->name, name, len);
925 root->name[len] ='\0';
926
927 return 0;
928 }
929
930 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
931 if (level == 0)
932 return root->leafsize;
933 return root->nodesize;
934 }
935
936 /* helper function to cast into the data area of the leaf. */
937 #define btrfs_item_ptr(leaf, slot, type) \
938 ((type *)(btrfs_leaf_data(leaf) + \
939 btrfs_item_offset_nr(leaf, slot)))
940
941 #define btrfs_item_ptr_offset(leaf, slot) \
942 ((unsigned long)(btrfs_leaf_data(leaf) + \
943 btrfs_item_offset_nr(leaf, slot)))
944
945 static inline struct dentry *fdentry(struct file *file) {
946 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
947 return file->f_dentry;
948 #else
949 return file->f_path.dentry;
950 #endif
951 }
952
953 /* extent-tree.c */
954 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
955 struct btrfs_path *count_path,
956 u64 first_extent);
957 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
958 struct btrfs_root *root);
959 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_map_tree *copy);
960 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
961 btrfs_fs_info *info,
962 u64 bytenr);
963 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
964 struct btrfs_block_group_cache
965 *hint, u64 search_start,
966 int data, int owner);
967 int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
968 struct btrfs_root *root, u64 owner_objectid);
969 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
970 struct btrfs_root *root, u32 size,
971 u64 root_objectid,
972 u64 hint, u64 empty_size);
973 struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
974 struct btrfs_root *root,
975 u32 blocksize,
976 u64 root_objectid,
977 u64 ref_generation,
978 u64 first_objectid,
979 int level,
980 u64 hint,
981 u64 empty_size);
982 int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans,
983 struct btrfs_root *root, u64 new_size);
984 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
985 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
986 struct btrfs_root *root,
987 struct btrfs_path *path, u64 bytenr,
988 u64 root_objectid, u64 ref_generation,
989 u64 owner, u64 owner_offset);
990 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
991 struct btrfs_root *root,
992 u64 num_bytes, u64 root_objectid, u64 ref_generation,
993 u64 owner, u64 owner_offset,
994 u64 empty_size, u64 hint_byte,
995 u64 search_end, struct btrfs_key *ins, int data);
996 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
997 struct extent_buffer *buf);
998 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
999 *root, u64 bytenr, u64 num_bytes,
1000 u64 root_objectid, u64 ref_generation,
1001 u64 owner_objectid, u64 owner_offset, int pin);
1002 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1003 struct btrfs_root *root,
1004 struct extent_map_tree *unpin);
1005 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1006 struct btrfs_root *root,
1007 u64 bytenr, u64 num_bytes,
1008 u64 root_objectid, u64 ref_generation,
1009 u64 owner, u64 owner_offset);
1010 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1011 struct btrfs_root *root);
1012 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1013 int btrfs_read_block_groups(struct btrfs_root *root);
1014 /* ctree.c */
1015 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1016 struct btrfs_root *root, struct extent_buffer *buf,
1017 struct extent_buffer *parent, int parent_slot,
1018 struct extent_buffer **cow_ret);
1019 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1020 struct btrfs_root *root,
1021 struct extent_buffer *buf,
1022 struct extent_buffer **cow_ret, u64 new_root_objectid);
1023 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1024 *root, struct btrfs_path *path, u32 data_size);
1025 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1026 struct btrfs_root *root,
1027 struct btrfs_path *path,
1028 u32 new_size, int from_end);
1029 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1030 *root, struct btrfs_key *key, struct btrfs_path *p, int
1031 ins_len, int cow);
1032 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1033 struct btrfs_root *root, struct extent_buffer *parent,
1034 int start_slot, int cache_only, u64 *last_ret,
1035 struct btrfs_key *progress);
1036 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1037 struct btrfs_path *btrfs_alloc_path(void);
1038 void btrfs_free_path(struct btrfs_path *p);
1039 void btrfs_init_path(struct btrfs_path *p);
1040 int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1041 struct btrfs_path *path);
1042 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1043 *root, struct btrfs_key *key, void *data, u32 data_size);
1044 int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root
1045 *root, struct btrfs_path *path, struct btrfs_key
1046 *cpu_key, u32 data_size);
1047 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1048 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1049 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1050 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1051 *root);
1052 /* root-item.c */
1053 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1054 struct btrfs_key *key);
1055 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1056 *root, struct btrfs_key *key, struct btrfs_root_item
1057 *item);
1058 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1059 *root, struct btrfs_key *key, struct btrfs_root_item
1060 *item);
1061 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1062 btrfs_root_item *item, struct btrfs_key *key);
1063 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1064 struct btrfs_root *latest_root);
1065 /* dir-item.c */
1066 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1067 *root, const char *name, int name_len, u64 dir,
1068 struct btrfs_key *location, u8 type);
1069 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1070 struct btrfs_root *root,
1071 struct btrfs_path *path, u64 dir,
1072 const char *name, int name_len,
1073 int mod);
1074 struct btrfs_dir_item *
1075 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1076 struct btrfs_root *root,
1077 struct btrfs_path *path, u64 dir,
1078 u64 objectid, const char *name, int name_len,
1079 int mod);
1080 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1081 struct btrfs_path *path,
1082 const char *name, int name_len);
1083 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1084 struct btrfs_root *root,
1085 struct btrfs_path *path,
1086 struct btrfs_dir_item *di);
1087 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1088 struct btrfs_root *root, const char *name,
1089 u16 name_len, const void *data, u16 data_len,
1090 u64 dir);
1091 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1092 struct btrfs_root *root,
1093 struct btrfs_path *path, u64 dir,
1094 const char *name, u16 name_len,
1095 int mod);
1096 /* inode-map.c */
1097 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1098 struct btrfs_root *fs_root,
1099 u64 dirid, u64 *objectid);
1100 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1101
1102 /* inode-item.c */
1103 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1104 struct btrfs_root *root,
1105 const char *name, int name_len,
1106 u64 inode_objectid, u64 ref_objectid);
1107 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1108 struct btrfs_root *root,
1109 const char *name, int name_len,
1110 u64 inode_objectid, u64 ref_objectid);
1111 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1112 struct btrfs_root *root,
1113 struct btrfs_path *path, u64 objectid);
1114 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1115 *root, struct btrfs_path *path,
1116 struct btrfs_key *location, int mod);
1117
1118 /* file-item.c */
1119 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1120 struct btrfs_root *root,
1121 u64 objectid, u64 pos, u64 offset,
1122 u64 disk_num_bytes,
1123 u64 num_bytes);
1124 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1125 struct btrfs_root *root,
1126 struct btrfs_path *path, u64 objectid,
1127 u64 bytenr, int mod);
1128 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
1129 struct btrfs_root *root,
1130 struct inode *inode,
1131 u64 objectid, u64 offset,
1132 char *data, size_t len);
1133 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1134 struct btrfs_root *root,
1135 struct btrfs_path *path,
1136 u64 objectid, u64 offset,
1137 int cow);
1138 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1139 struct btrfs_root *root, struct btrfs_path *path,
1140 u64 isize);
1141 /* inode.c */
1142 unsigned long btrfs_force_ra(struct address_space *mapping,
1143 struct file_ra_state *ra, struct file *file,
1144 pgoff_t offset, pgoff_t last_index);
1145 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1146 int for_del);
1147 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1148 int btrfs_readpage(struct file *file, struct page *page);
1149 void btrfs_delete_inode(struct inode *inode);
1150 void btrfs_put_inode(struct inode *inode);
1151 void btrfs_read_locked_inode(struct inode *inode);
1152 int btrfs_write_inode(struct inode *inode, int wait);
1153 void btrfs_dirty_inode(struct inode *inode);
1154 struct inode *btrfs_alloc_inode(struct super_block *sb);
1155 void btrfs_destroy_inode(struct inode *inode);
1156 int btrfs_init_cachep(void);
1157 void btrfs_destroy_cachep(void);
1158 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1159 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1160 struct btrfs_root *root);
1161 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1162 u64 root_objectid);
1163 int btrfs_commit_write(struct file *file, struct page *page,
1164 unsigned from, unsigned to);
1165 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1166 size_t page_offset, u64 start, u64 end,
1167 int create);
1168 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1169 struct btrfs_root *root,
1170 struct inode *inode);
1171 /* file.c */
1172 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1173 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1174 extern struct file_operations btrfs_file_operations;
1175 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1176 struct btrfs_root *root, struct inode *inode,
1177 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1178 /* tree-defrag.c */
1179 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1180 struct btrfs_root *root, int cache_only);
1181
1182 /* sysfs.c */
1183 int btrfs_init_sysfs(void);
1184 void btrfs_exit_sysfs(void);
1185 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1186 int btrfs_sysfs_add_root(struct btrfs_root *root);
1187 void btrfs_sysfs_del_root(struct btrfs_root *root);
1188 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1189
1190 /* xattr.c */
1191 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1192 int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
1193 struct btrfs_root *root, struct inode *inode);
1194 /* super.c */
1195 u64 btrfs_parse_size(char *str);
1196 #endif