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Btrfs: only write one super copy during fsync
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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
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19#ifndef __BTRFS_CTREE__
20#define __BTRFS_CTREE__
eb60ceac 21
6da6abae 22#include <linux/version.h>
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23#include <linux/mm.h>
24#include <linux/highmem.h>
e20d96d6 25#include <linux/fs.h>
58176a96 26#include <linux/completion.h>
04160088 27#include <linux/backing-dev.h>
e6dcd2dc 28#include <linux/wait.h>
479965d6 29#include <asm/kmap_types.h>
d1310b2e 30#include "extent_io.h"
5f39d397 31#include "extent_map.h"
8b712842 32#include "async-thread.h"
e20d96d6 33
e089f05c 34struct btrfs_trans_handle;
79154b1b 35struct btrfs_transaction;
35b7e476
CM
36extern struct kmem_cache *btrfs_trans_handle_cachep;
37extern struct kmem_cache *btrfs_transaction_cachep;
38extern struct kmem_cache *btrfs_bit_radix_cachep;
2c90e5d6 39extern struct kmem_cache *btrfs_path_cachep;
e6dcd2dc 40struct btrfs_ordered_sum;
e089f05c 41
2a7108ad 42#define BTRFS_MAGIC "_BHRfS_M"
eb60ceac 43
4008c04a 44#define BTRFS_MAX_LEVEL 8
0b86a832 45
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46#define BTRFS_COMPAT_EXTENT_TREE_V0
47
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48/*
49 * files bigger than this get some pre-flushing when they are added
50 * to the ordered operations list. That way we limit the total
51 * work done by the commit
52 */
53#define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
54
0b86a832 55/* holds pointers to all of the tree roots */
6407bf6d 56#define BTRFS_ROOT_TREE_OBJECTID 1ULL
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57
58/* stores information about which extents are in use, and reference counts */
0cf6c620 59#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
0b86a832 60
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61/*
62 * chunk tree stores translations from logical -> physical block numbering
63 * the super block points to the chunk tree
64 */
e085def2 65#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
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66
67/*
68 * stores information about which areas of a given device are in use.
69 * one per device. The tree of tree roots points to the device tree
70 */
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71#define BTRFS_DEV_TREE_OBJECTID 4ULL
72
73/* one per subvolume, storing files and directories */
74#define BTRFS_FS_TREE_OBJECTID 5ULL
75
76/* directory objectid inside the root tree */
77#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
0b86a832 78
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79/* holds checksums of all the data extents */
80#define BTRFS_CSUM_TREE_OBJECTID 7ULL
81
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82/* orhpan objectid for tracking unlinked/truncated files */
83#define BTRFS_ORPHAN_OBJECTID -5ULL
84
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85/* does write ahead logging to speed up fsyncs */
86#define BTRFS_TREE_LOG_OBJECTID -6ULL
87#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
88
e4657689
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89/* for space balancing */
90#define BTRFS_TREE_RELOC_OBJECTID -8ULL
91#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
92
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93/*
94 * extent checksums all have this objectid
95 * this allows them to share the logging tree
96 * for fsyncs
97 */
98#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
99
31840ae1
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100/* dummy objectid represents multiple objectids */
101#define BTRFS_MULTIPLE_OBJECTIDS -255ULL
102
0b86a832 103/*
6527cdbe 104 * All files have objectids in this range.
0b86a832 105 */
f6dbff55 106#define BTRFS_FIRST_FREE_OBJECTID 256ULL
6527cdbe 107#define BTRFS_LAST_FREE_OBJECTID -256ULL
e17cade2 108#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
3768f368 109
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110
111/*
112 * the device items go into the chunk tree. The key is in the form
113 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
114 */
115#define BTRFS_DEV_ITEMS_OBJECTID 1ULL
116
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117#define BTRFS_BTREE_INODE_OBJECTID 1
118
119#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
120
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121/*
122 * we can actually store much bigger names, but lets not confuse the rest
123 * of linux
124 */
125#define BTRFS_NAME_LEN 255
126
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127/* 32 bytes in various csum fields */
128#define BTRFS_CSUM_SIZE 32
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129
130/* csum types */
131#define BTRFS_CSUM_TYPE_CRC32 0
132
133static int btrfs_csum_sizes[] = { 4, 0 };
134
509659cd 135/* four bytes for CRC32 */
3954401f 136#define BTRFS_EMPTY_DIR_SIZE 0
f254e52c 137
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138#define BTRFS_FT_UNKNOWN 0
139#define BTRFS_FT_REG_FILE 1
140#define BTRFS_FT_DIR 2
141#define BTRFS_FT_CHRDEV 3
142#define BTRFS_FT_BLKDEV 4
143#define BTRFS_FT_FIFO 5
144#define BTRFS_FT_SOCK 6
145#define BTRFS_FT_SYMLINK 7
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146#define BTRFS_FT_XATTR 8
147#define BTRFS_FT_MAX 9
fabb5681 148
fec577fb 149/*
d4a78947
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150 * The key defines the order in the tree, and so it also defines (optimal)
151 * block layout.
152 *
153 * objectid corresponds to the inode number.
154 *
155 * type tells us things about the object, and is a kind of stream selector.
156 * so for a given inode, keys with type of 1 might refer to the inode data,
157 * type of 2 may point to file data in the btree and type == 3 may point to
158 * extents.
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159 *
160 * offset is the starting byte offset for this key in the stream.
e2fa7227
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161 *
162 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
163 * in cpu native order. Otherwise they are identical and their sizes
164 * should be the same (ie both packed)
fec577fb 165 */
e2fa7227
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166struct btrfs_disk_key {
167 __le64 objectid;
5f39d397 168 u8 type;
70b2befd 169 __le64 offset;
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170} __attribute__ ((__packed__));
171
172struct btrfs_key {
eb60ceac 173 u64 objectid;
5f39d397 174 u8 type;
70b2befd 175 u64 offset;
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176} __attribute__ ((__packed__));
177
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178struct btrfs_mapping_tree {
179 struct extent_map_tree map_tree;
180};
181
e17cade2 182#define BTRFS_UUID_SIZE 16
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183struct btrfs_dev_item {
184 /* the internal btrfs device id */
185 __le64 devid;
186
187 /* size of the device */
188 __le64 total_bytes;
189
190 /* bytes used */
191 __le64 bytes_used;
192
193 /* optimal io alignment for this device */
194 __le32 io_align;
195
196 /* optimal io width for this device */
197 __le32 io_width;
198
199 /* minimal io size for this device */
200 __le32 sector_size;
201
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202 /* type and info about this device */
203 __le64 type;
204
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205 /* expected generation for this device */
206 __le64 generation;
207
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208 /*
209 * starting byte of this partition on the device,
d4a78947 210 * to allow for stripe alignment in the future
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211 */
212 __le64 start_offset;
213
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214 /* grouping information for allocation decisions */
215 __le32 dev_group;
216
217 /* seek speed 0-100 where 100 is fastest */
218 u8 seek_speed;
219
220 /* bandwidth 0-100 where 100 is fastest */
221 u8 bandwidth;
222
0d81ba5d 223 /* btrfs generated uuid for this device */
e17cade2 224 u8 uuid[BTRFS_UUID_SIZE];
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225
226 /* uuid of FS who owns this device */
227 u8 fsid[BTRFS_UUID_SIZE];
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228} __attribute__ ((__packed__));
229
230struct btrfs_stripe {
231 __le64 devid;
232 __le64 offset;
e17cade2 233 u8 dev_uuid[BTRFS_UUID_SIZE];
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234} __attribute__ ((__packed__));
235
236struct btrfs_chunk {
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237 /* size of this chunk in bytes */
238 __le64 length;
239
240 /* objectid of the root referencing this chunk */
0b86a832 241 __le64 owner;
e17cade2 242
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243 __le64 stripe_len;
244 __le64 type;
245
246 /* optimal io alignment for this chunk */
247 __le32 io_align;
248
249 /* optimal io width for this chunk */
250 __le32 io_width;
251
252 /* minimal io size for this chunk */
253 __le32 sector_size;
254
255 /* 2^16 stripes is quite a lot, a second limit is the size of a single
256 * item in the btree
257 */
258 __le16 num_stripes;
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259
260 /* sub stripes only matter for raid10 */
261 __le16 sub_stripes;
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262 struct btrfs_stripe stripe;
263 /* additional stripes go here */
264} __attribute__ ((__packed__));
265
266static inline unsigned long btrfs_chunk_item_size(int num_stripes)
267{
268 BUG_ON(num_stripes == 0);
269 return sizeof(struct btrfs_chunk) +
270 sizeof(struct btrfs_stripe) * (num_stripes - 1);
271}
272
5f39d397 273#define BTRFS_FSID_SIZE 16
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274#define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
275#define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
276#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
277#define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
278
279#define BTRFS_BACKREF_REV_MAX 256
280#define BTRFS_BACKREF_REV_SHIFT 56
281#define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
282 BTRFS_BACKREF_REV_SHIFT)
283
284#define BTRFS_OLD_BACKREF_REV 0
285#define BTRFS_MIXED_BACKREF_REV 1
63b10fc4 286
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287/*
288 * every tree block (leaf or node) starts with this header.
289 */
bb492bb0 290struct btrfs_header {
e17cade2 291 /* these first four must match the super block */
f254e52c 292 u8 csum[BTRFS_CSUM_SIZE];
5f39d397 293 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
db94535d 294 __le64 bytenr; /* which block this node is supposed to live in */
63b10fc4 295 __le64 flags;
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CM
296
297 /* allowed to be different from the super from here on down */
298 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
7f5c1516 299 __le64 generation;
4d775673 300 __le64 owner;
5f39d397 301 __le32 nritems;
9a6f11ed 302 u8 level;
eb60ceac
CM
303} __attribute__ ((__packed__));
304
5f39d397 305#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
d397712b
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306 sizeof(struct btrfs_header)) / \
307 sizeof(struct btrfs_key_ptr))
123abc88 308#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
5f39d397 309#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
236454df
CM
310#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
311 sizeof(struct btrfs_item) - \
312 sizeof(struct btrfs_file_extent_item))
eb60ceac 313
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CM
314
315/*
316 * this is a very generous portion of the super block, giving us
317 * room to translate 14 chunks with 3 stripes each.
318 */
319#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
7ae9c09d 320#define BTRFS_LABEL_SIZE 256
0b86a832 321
fec577fb
CM
322/*
323 * the super block basically lists the main trees of the FS
324 * it currently lacks any block count etc etc
325 */
234b63a0 326struct btrfs_super_block {
f254e52c 327 u8 csum[BTRFS_CSUM_SIZE];
63b10fc4 328 /* the first 4 fields must match struct btrfs_header */
2b82032c 329 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
db94535d 330 __le64 bytenr; /* this block number */
63b10fc4 331 __le64 flags;
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CM
332
333 /* allowed to be different from the btrfs_header from here own down */
3768f368 334 __le64 magic;
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CM
335 __le64 generation;
336 __le64 root;
0b86a832 337 __le64 chunk_root;
e02119d5 338 __le64 log_root;
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339
340 /* this will help find the new super based on the log root */
341 __le64 log_root_transid;
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342 __le64 total_bytes;
343 __le64 bytes_used;
2e635a27 344 __le64 root_dir_objectid;
8a4b83cc 345 __le64 num_devices;
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CM
346 __le32 sectorsize;
347 __le32 nodesize;
348 __le32 leafsize;
87ee04eb 349 __le32 stripesize;
0b86a832 350 __le32 sys_chunk_array_size;
84234f3a 351 __le64 chunk_root_generation;
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JB
352 __le64 compat_flags;
353 __le64 compat_ro_flags;
354 __le64 incompat_flags;
607d432d 355 __le16 csum_type;
db94535d 356 u8 root_level;
0b86a832 357 u8 chunk_root_level;
e02119d5 358 u8 log_root_level;
0d81ba5d 359 struct btrfs_dev_item dev_item;
c3027eb5 360
7ae9c09d 361 char label[BTRFS_LABEL_SIZE];
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CM
362
363 /* future expansion */
364 __le64 reserved[32];
0b86a832 365 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
cfaa7295
CM
366} __attribute__ ((__packed__));
367
f2b636e8
JB
368/*
369 * Compat flags that we support. If any incompat flags are set other than the
370 * ones specified below then we will fail to mount
371 */
5d4f98a2
YZ
372#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
373
374#define BTRFS_FEATURE_COMPAT_SUPP 0ULL
375#define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
376#define BTRFS_FEATURE_INCOMPAT_SUPP \
377 BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF
f2b636e8 378
fec577fb 379/*
62e2749e 380 * A leaf is full of items. offset and size tell us where to find
fec577fb
CM
381 * the item in the leaf (relative to the start of the data area)
382 */
0783fcfc 383struct btrfs_item {
e2fa7227 384 struct btrfs_disk_key key;
123abc88 385 __le32 offset;
5f39d397 386 __le32 size;
eb60ceac
CM
387} __attribute__ ((__packed__));
388
fec577fb
CM
389/*
390 * leaves have an item area and a data area:
391 * [item0, item1....itemN] [free space] [dataN...data1, data0]
392 *
393 * The data is separate from the items to get the keys closer together
394 * during searches.
395 */
234b63a0 396struct btrfs_leaf {
bb492bb0 397 struct btrfs_header header;
123abc88 398 struct btrfs_item items[];
eb60ceac
CM
399} __attribute__ ((__packed__));
400
fec577fb
CM
401/*
402 * all non-leaf blocks are nodes, they hold only keys and pointers to
403 * other blocks
404 */
123abc88
CM
405struct btrfs_key_ptr {
406 struct btrfs_disk_key key;
407 __le64 blockptr;
74493f7a 408 __le64 generation;
123abc88
CM
409} __attribute__ ((__packed__));
410
234b63a0 411struct btrfs_node {
bb492bb0 412 struct btrfs_header header;
123abc88 413 struct btrfs_key_ptr ptrs[];
eb60ceac
CM
414} __attribute__ ((__packed__));
415
fec577fb 416/*
234b63a0
CM
417 * btrfs_paths remember the path taken from the root down to the leaf.
418 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
fec577fb
CM
419 * to any other levels that are present.
420 *
421 * The slots array records the index of the item or block pointer
422 * used while walking the tree.
423 */
234b63a0 424struct btrfs_path {
5f39d397 425 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
234b63a0 426 int slots[BTRFS_MAX_LEVEL];
925baedd
CM
427 /* if there is real range locking, this locks field will change */
428 int locks[BTRFS_MAX_LEVEL];
3c69faec 429 int reada;
925baedd 430 /* keep some upper locks as we walk down */
6702ed49 431 int lowest_level;
459931ec
CM
432
433 /*
434 * set by btrfs_split_item, tells search_slot to keep all locks
435 * and to force calls to keep space in the nodes
436 */
b9473439
CM
437 unsigned int search_for_split:1;
438 unsigned int keep_locks:1;
439 unsigned int skip_locking:1;
440 unsigned int leave_spinning:1;
5d4f98a2 441 unsigned int search_commit_root:1;
eb60ceac 442};
5de08d7d 443
62e2749e
CM
444/*
445 * items in the extent btree are used to record the objectid of the
446 * owner of the block and the number of references
447 */
5d4f98a2 448
62e2749e 449struct btrfs_extent_item {
5d4f98a2
YZ
450 __le64 refs;
451 __le64 generation;
452 __le64 flags;
453} __attribute__ ((__packed__));
454
455struct btrfs_extent_item_v0 {
62e2749e 456 __le32 refs;
74493f7a
CM
457} __attribute__ ((__packed__));
458
5d4f98a2
YZ
459#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
460 sizeof(struct btrfs_item))
461
462#define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
463#define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
464
465/* following flags only apply to tree blocks */
466
467/* use full backrefs for extent pointers in the block */
468#define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
469
470struct btrfs_tree_block_info {
471 struct btrfs_disk_key key;
472 u8 level;
473} __attribute__ ((__packed__));
474
475struct btrfs_extent_data_ref {
476 __le64 root;
477 __le64 objectid;
478 __le64 offset;
479 __le32 count;
480} __attribute__ ((__packed__));
481
482struct btrfs_shared_data_ref {
483 __le32 count;
484} __attribute__ ((__packed__));
485
486struct btrfs_extent_inline_ref {
487 u8 type;
1bec1aed 488 __le64 offset;
5d4f98a2
YZ
489} __attribute__ ((__packed__));
490
491/* old style backrefs item */
492struct btrfs_extent_ref_v0 {
74493f7a
CM
493 __le64 root;
494 __le64 generation;
495 __le64 objectid;
5d4f98a2 496 __le32 count;
62e2749e
CM
497} __attribute__ ((__packed__));
498
5d4f98a2 499
0b86a832
CM
500/* dev extents record free space on individual devices. The owner
501 * field points back to the chunk allocation mapping tree that allocated
e17cade2 502 * the extent. The chunk tree uuid field is a way to double check the owner
0b86a832
CM
503 */
504struct btrfs_dev_extent {
e17cade2
CM
505 __le64 chunk_tree;
506 __le64 chunk_objectid;
507 __le64 chunk_offset;
0b86a832 508 __le64 length;
e17cade2 509 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
0b86a832
CM
510} __attribute__ ((__packed__));
511
3954401f 512struct btrfs_inode_ref {
aec7477b 513 __le64 index;
3954401f
CM
514 __le16 name_len;
515 /* name goes here */
516} __attribute__ ((__packed__));
517
0b86a832 518struct btrfs_timespec {
f254e52c 519 __le64 sec;
1e1d2701
CM
520 __le32 nsec;
521} __attribute__ ((__packed__));
522
95029d7d 523enum btrfs_compression_type {
c8b97818
CM
524 BTRFS_COMPRESS_NONE = 0,
525 BTRFS_COMPRESS_ZLIB = 1,
526 BTRFS_COMPRESS_LAST = 2,
95029d7d 527};
c8b97818 528
1e1d2701 529struct btrfs_inode_item {
e02119d5 530 /* nfs style generation number */
1e1d2701 531 __le64 generation;
e02119d5
CM
532 /* transid that last touched this inode */
533 __le64 transid;
1e1d2701 534 __le64 size;
a76a3cd4 535 __le64 nbytes;
31f3c99b 536 __le64 block_group;
1e1d2701
CM
537 __le32 nlink;
538 __le32 uid;
539 __le32 gid;
540 __le32 mode;
0b86a832 541 __le64 rdev;
f2b636e8 542 __le64 flags;
c8b97818 543
c3027eb5
CM
544 /* modification sequence number for NFS */
545 __le64 sequence;
546
547 /*
548 * a little future expansion, for more than this we can
549 * just grow the inode item and version it
550 */
551 __le64 reserved[4];
0b86a832
CM
552 struct btrfs_timespec atime;
553 struct btrfs_timespec ctime;
554 struct btrfs_timespec mtime;
555 struct btrfs_timespec otime;
1e1d2701
CM
556} __attribute__ ((__packed__));
557
e02119d5
CM
558struct btrfs_dir_log_item {
559 __le64 end;
560} __attribute__ ((__packed__));
561
62e2749e 562struct btrfs_dir_item {
d6e4a428 563 struct btrfs_disk_key location;
e02119d5 564 __le64 transid;
5103e947 565 __le16 data_len;
a8a2ee0c 566 __le16 name_len;
62e2749e
CM
567 u8 type;
568} __attribute__ ((__packed__));
569
570struct btrfs_root_item {
d6e4a428 571 struct btrfs_inode_item inode;
84234f3a 572 __le64 generation;
d6e4a428 573 __le64 root_dirid;
db94535d
CM
574 __le64 bytenr;
575 __le64 byte_limit;
576 __le64 bytes_used;
80ff3856 577 __le64 last_snapshot;
f2b636e8 578 __le64 flags;
62e2749e 579 __le32 refs;
5eda7b5e
CM
580 struct btrfs_disk_key drop_progress;
581 u8 drop_level;
db94535d 582 u8 level;
9f5fae2f 583} __attribute__ ((__packed__));
62e2749e 584
0660b5af
CM
585/*
586 * this is used for both forward and backward root refs
587 */
588struct btrfs_root_ref {
589 __le64 dirid;
590 __le64 sequence;
591 __le16 name_len;
592} __attribute__ ((__packed__));
593
d899e052
YZ
594#define BTRFS_FILE_EXTENT_INLINE 0
595#define BTRFS_FILE_EXTENT_REG 1
596#define BTRFS_FILE_EXTENT_PREALLOC 2
236454df 597
9f5fae2f 598struct btrfs_file_extent_item {
c8b97818
CM
599 /*
600 * transaction id that created this extent
601 */
71951f35 602 __le64 generation;
c8b97818
CM
603 /*
604 * max number of bytes to hold this extent in ram
605 * when we split a compressed extent we can't know how big
606 * each of the resulting pieces will be. So, this is
607 * an upper limit on the size of the extent in ram instead of
608 * an exact limit.
609 */
610 __le64 ram_bytes;
611
612 /*
613 * 32 bits for the various ways we might encode the data,
614 * including compression and encryption. If any of these
615 * are set to something a given disk format doesn't understand
616 * it is treated like an incompat flag for reading and writing,
617 * but not for stat.
618 */
619 u8 compression;
620 u8 encryption;
621 __le16 other_encoding; /* spare for later use */
622
623 /* are we inline data or a real extent? */
236454df 624 u8 type;
c8b97818 625
9f5fae2f
CM
626 /*
627 * disk space consumed by the extent, checksum blocks are included
628 * in these numbers
629 */
db94535d
CM
630 __le64 disk_bytenr;
631 __le64 disk_num_bytes;
9f5fae2f 632 /*
dee26a9f 633 * the logical offset in file blocks (no csums)
9f5fae2f
CM
634 * this extent record is for. This allows a file extent to point
635 * into the middle of an existing extent on disk, sharing it
636 * between two snapshots (useful if some bytes in the middle of the
637 * extent have changed
638 */
639 __le64 offset;
640 /*
c8b97818
CM
641 * the logical number of file blocks (no csums included). This
642 * always reflects the size uncompressed and without encoding.
9f5fae2f 643 */
db94535d 644 __le64 num_bytes;
c8b97818 645
9f5fae2f
CM
646} __attribute__ ((__packed__));
647
f254e52c 648struct btrfs_csum_item {
509659cd 649 u8 csum;
f254e52c
CM
650} __attribute__ ((__packed__));
651
0b86a832
CM
652/* different types of block groups (and chunks) */
653#define BTRFS_BLOCK_GROUP_DATA (1 << 0)
654#define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
655#define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
593060d7 656#define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
8790d502 657#define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
611f0e00 658#define BTRFS_BLOCK_GROUP_DUP (1 << 5)
321aecc6 659#define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
1e2677e0 660
9078a3e1
CM
661struct btrfs_block_group_item {
662 __le64 used;
0b86a832
CM
663 __le64 chunk_objectid;
664 __le64 flags;
9078a3e1
CM
665} __attribute__ ((__packed__));
666
6324fbf3
CM
667struct btrfs_space_info {
668 u64 flags;
6a63209f
JB
669
670 u64 total_bytes; /* total bytes in the space */
671 u64 bytes_used; /* total bytes used on disk */
672 u64 bytes_pinned; /* total bytes pinned, will be freed when the
673 transaction finishes */
674 u64 bytes_reserved; /* total bytes the allocator has reserved for
675 current allocations */
676 u64 bytes_readonly; /* total bytes that are read only */
1b2da372 677 u64 bytes_super; /* total bytes reserved for the super blocks */
9ed74f2d
JB
678 u64 bytes_root; /* the number of bytes needed to commit a
679 transaction */
6a63209f 680 u64 bytes_may_use; /* number of bytes that may be used for
9ed74f2d
JB
681 delalloc/allocations */
682 u64 bytes_delalloc; /* number of bytes currently reserved for
683 delayed allocation */
6a63209f
JB
684
685 int full; /* indicates that we cannot allocate any more
686 chunks for this space */
687 int force_alloc; /* set if we need to force a chunk alloc for
688 this space */
9ed74f2d
JB
689 int force_delalloc; /* make people start doing filemap_flush until
690 we're under a threshold */
6a63209f 691
6324fbf3 692 struct list_head list;
0f9dd46c 693
e3ccfa98
JB
694 /* for controlling how we free up space for allocations */
695 wait_queue_head_t allocate_wait;
696 wait_queue_head_t flush_wait;
697 int allocating_chunk;
698 int flushing;
699
0f9dd46c
JB
700 /* for block groups in our same type */
701 struct list_head block_groups;
702 spinlock_t lock;
80eb234a 703 struct rw_semaphore groups_sem;
817d52f8 704 atomic_t caching_threads;
0f9dd46c
JB
705};
706
fa9c0d79
CM
707/*
708 * free clusters are used to claim free space in relatively large chunks,
709 * allowing us to do less seeky writes. They are used for all metadata
710 * allocations and data allocations in ssd mode.
711 */
712struct btrfs_free_cluster {
713 spinlock_t lock;
714 spinlock_t refill_lock;
715 struct rb_root root;
716
717 /* largest extent in this cluster */
718 u64 max_size;
719
720 /* first extent starting offset */
721 u64 window_start;
722
96303081
JB
723 /* if this cluster simply points at a bitmap in the block group */
724 bool points_to_bitmap;
725
fa9c0d79
CM
726 struct btrfs_block_group_cache *block_group;
727 /*
728 * when a cluster is allocated from a block group, we put the
729 * cluster onto a list in the block group so that it can
730 * be freed before the block group is freed.
731 */
732 struct list_head block_group_list;
6324fbf3
CM
733};
734
817d52f8
JB
735enum btrfs_caching_type {
736 BTRFS_CACHE_NO = 0,
737 BTRFS_CACHE_STARTED = 1,
738 BTRFS_CACHE_FINISHED = 2,
739};
740
11833d66
YZ
741struct btrfs_caching_control {
742 struct list_head list;
743 struct mutex mutex;
744 wait_queue_head_t wait;
745 struct btrfs_block_group_cache *block_group;
746 u64 progress;
747 atomic_t count;
748};
749
9078a3e1
CM
750struct btrfs_block_group_cache {
751 struct btrfs_key key;
752 struct btrfs_block_group_item item;
817d52f8 753 struct btrfs_fs_info *fs_info;
c286ac48 754 spinlock_t lock;
324ae4df 755 u64 pinned;
e8569813 756 u64 reserved;
1b2da372 757 u64 bytes_super;
0b86a832 758 u64 flags;
96303081
JB
759 u64 sectorsize;
760 int extents_thresh;
761 int free_extents;
762 int total_bitmaps;
8f18cf13 763 int ro;
0f9dd46c
JB
764 int dirty;
765
817d52f8 766 /* cache tracking stuff */
817d52f8 767 int cached;
11833d66
YZ
768 struct btrfs_caching_control *caching_ctl;
769 u64 last_byte_to_unpin;
817d52f8 770
0f9dd46c
JB
771 struct btrfs_space_info *space_info;
772
773 /* free space cache stuff */
6226cb0a 774 spinlock_t tree_lock;
0f9dd46c 775 struct rb_root free_space_offset;
817d52f8 776 u64 free_space;
0f9dd46c
JB
777
778 /* block group cache stuff */
779 struct rb_node cache_node;
780
781 /* for block groups in the same raid type */
782 struct list_head list;
d2fb3437
YZ
783
784 /* usage count */
785 atomic_t count;
fa9c0d79
CM
786
787 /* List of struct btrfs_free_clusters for this block group.
788 * Today it will only have one thing on it, but that may change
789 */
790 struct list_head cluster_list;
9078a3e1 791};
0b86a832 792
5d4f98a2 793struct reloc_control;
0b86a832 794struct btrfs_device;
8a4b83cc 795struct btrfs_fs_devices;
9f5fae2f 796struct btrfs_fs_info {
5f39d397 797 u8 fsid[BTRFS_FSID_SIZE];
e17cade2 798 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
62e2749e
CM
799 struct btrfs_root *extent_root;
800 struct btrfs_root *tree_root;
0b86a832
CM
801 struct btrfs_root *chunk_root;
802 struct btrfs_root *dev_root;
3de4586c 803 struct btrfs_root *fs_root;
d20f7043 804 struct btrfs_root *csum_root;
e02119d5
CM
805
806 /* the log root tree is a directory of all the other log roots */
807 struct btrfs_root *log_root_tree;
4df27c4d
YZ
808
809 spinlock_t fs_roots_radix_lock;
0f7d52f4 810 struct radix_tree_root fs_roots_radix;
1a5bc167 811
0f9dd46c
JB
812 /* block group cache stuff */
813 spinlock_t block_group_cache_lock;
814 struct rb_root block_group_cache_tree;
815
11833d66
YZ
816 struct extent_io_tree freed_extents[2];
817 struct extent_io_tree *pinned_extents;
1a5bc167 818
0b86a832
CM
819 /* logical->physical extent mapping */
820 struct btrfs_mapping_tree mapping_tree;
821
293ffd5f 822 u64 generation;
15ee9bc7 823 u64 last_trans_committed;
12fcfd22
CM
824
825 /*
826 * this is updated to the current trans every time a full commit
827 * is required instead of the faster short fsync log commits
828 */
829 u64 last_trans_log_full_commit;
9ca9ee09 830 u64 open_ioctl_trans;
b6cda9bc 831 unsigned long mount_opt;
c59f8951 832 u64 max_extent;
6f568d35 833 u64 max_inline;
8f662a76 834 u64 alloc_start;
79154b1b 835 struct btrfs_transaction *running_transaction;
e6dcd2dc 836 wait_queue_head_t transaction_throttle;
f9295749 837 wait_queue_head_t transaction_wait;
771ed689 838 wait_queue_head_t async_submit_wait;
e02119d5 839
4b52dff6 840 struct btrfs_super_block super_copy;
a061fc8d 841 struct btrfs_super_block super_for_commit;
0b86a832 842 struct block_device *__bdev;
e20d96d6 843 struct super_block *sb;
d98237b3 844 struct inode *btree_inode;
04160088 845 struct backing_dev_info bdi;
79154b1b 846 struct mutex trans_mutex;
e02119d5 847 struct mutex tree_log_mutex;
a74a4b97
CM
848 struct mutex transaction_kthread_mutex;
849 struct mutex cleaner_mutex;
925baedd 850 struct mutex chunk_mutex;
7d9eb12c 851 struct mutex volume_mutex;
5a3f23d5
CM
852 /*
853 * this protects the ordered operations list only while we are
854 * processing all of the entries on it. This way we make
855 * sure the commit code doesn't find the list temporarily empty
856 * because another function happens to be doing non-waiting preflush
857 * before jumping into the main commit.
858 */
859 struct mutex ordered_operations_mutex;
11833d66 860 struct rw_semaphore extent_commit_sem;
5a3f23d5 861
76dda93c
YZ
862 struct rw_semaphore subvol_sem;
863
864 struct srcu_struct subvol_srcu;
865
8fd17795 866 struct list_head trans_list;
19c00ddc 867 struct list_head hashers;
facda1e7 868 struct list_head dead_roots;
11833d66 869 struct list_head caching_block_groups;
e02119d5 870
cb03c743 871 atomic_t nr_async_submits;
8c8bee1d 872 atomic_t async_submit_draining;
0986fe9e 873 atomic_t nr_async_bios;
771ed689 874 atomic_t async_delalloc_pages;
ce9adaa5 875
3eaa2885
CM
876 /*
877 * this is used by the balancing code to wait for all the pending
878 * ordered extents
879 */
880 spinlock_t ordered_extent_lock;
5a3f23d5
CM
881
882 /*
883 * all of the data=ordered extents pending writeback
884 * these can span multiple transactions and basically include
885 * every dirty data page that isn't from nodatacow
886 */
3eaa2885 887 struct list_head ordered_extents;
5a3f23d5
CM
888
889 /*
890 * all of the inodes that have delalloc bytes. It is possible for
891 * this list to be empty even when there is still dirty data=ordered
892 * extents waiting to finish IO.
893 */
ea8c2819 894 struct list_head delalloc_inodes;
3eaa2885 895
5a3f23d5
CM
896 /*
897 * special rename and truncate targets that must be on disk before
898 * we're allowed to commit. This is basically the ext3 style
899 * data=ordered list.
900 */
901 struct list_head ordered_operations;
902
8b712842
CM
903 /*
904 * there is a pool of worker threads for checksumming during writes
905 * and a pool for checksumming after reads. This is because readers
906 * can run with FS locks held, and the writers may be waiting for
907 * those locks. We don't want ordering in the pending list to cause
908 * deadlocks, and so the two are serviced separately.
1cc127b5
CM
909 *
910 * A third pool does submit_bio to avoid deadlocking with the other
911 * two
8b712842 912 */
61d92c32 913 struct btrfs_workers generic_worker;
8b712842 914 struct btrfs_workers workers;
771ed689 915 struct btrfs_workers delalloc_workers;
8b712842 916 struct btrfs_workers endio_workers;
d20f7043 917 struct btrfs_workers endio_meta_workers;
cad321ad 918 struct btrfs_workers endio_meta_write_workers;
e6dcd2dc 919 struct btrfs_workers endio_write_workers;
1cc127b5 920 struct btrfs_workers submit_workers;
e3ccfa98 921 struct btrfs_workers enospc_workers;
247e743c
CM
922 /*
923 * fixup workers take dirty pages that didn't properly go through
924 * the cow mechanism and make them safe to write. It happens
925 * for the sys_munmap function call path
926 */
927 struct btrfs_workers fixup_workers;
a74a4b97
CM
928 struct task_struct *transaction_kthread;
929 struct task_struct *cleaner_kthread;
4543df7e 930 int thread_pool_size;
8b712842 931
58176a96
JB
932 struct kobject super_kobj;
933 struct completion kobj_unregister;
e66f709b 934 int do_barriers;
facda1e7 935 int closing;
e02119d5 936 int log_root_recovering;
9f5fae2f 937
324ae4df 938 u64 total_pinned;
b9473439
CM
939
940 /* protected by the delalloc lock, used to keep from writing
941 * metadata until there is a nice batch
942 */
943 u64 dirty_metadata_bytes;
0b86a832
CM
944 struct list_head dirty_cowonly_roots;
945
8a4b83cc 946 struct btrfs_fs_devices *fs_devices;
4184ea7f
CM
947
948 /*
949 * the space_info list is almost entirely read only. It only changes
950 * when we add a new raid type to the FS, and that happens
951 * very rarely. RCU is used to protect it.
952 */
6324fbf3 953 struct list_head space_info;
4184ea7f 954
5d4f98a2
YZ
955 struct reloc_control *reloc_ctl;
956
1832a6d5 957 spinlock_t delalloc_lock;
cee36a03 958 spinlock_t new_trans_lock;
1832a6d5 959 u64 delalloc_bytes;
fa9c0d79
CM
960
961 /* data_alloc_cluster is only used in ssd mode */
962 struct btrfs_free_cluster data_alloc_cluster;
963
964 /* all metadata allocations go through this cluster */
965 struct btrfs_free_cluster meta_alloc_cluster;
d18a2c44 966
31153d81
YZ
967 spinlock_t ref_cache_lock;
968 u64 total_ref_cache_size;
31153d81 969
d18a2c44
CM
970 u64 avail_data_alloc_bits;
971 u64 avail_metadata_alloc_bits;
972 u64 avail_system_alloc_bits;
973 u64 data_alloc_profile;
974 u64 metadata_alloc_profile;
975 u64 system_alloc_profile;
788f20eb 976
97e728d4
JB
977 unsigned data_chunk_allocations;
978 unsigned metadata_ratio;
979
788f20eb 980 void *bdev_holder;
324ae4df 981};
0b86a832 982
9f5fae2f
CM
983/*
984 * in ram representation of the tree. extent_root is used for all allocations
f2458e1d 985 * and for the extent tree extent_root root.
9f5fae2f
CM
986 */
987struct btrfs_root {
5f39d397 988 struct extent_buffer *node;
925baedd
CM
989
990 /* the node lock is held while changing the node pointer */
991 spinlock_t node_lock;
992
5f39d397 993 struct extent_buffer *commit_root;
e02119d5 994 struct btrfs_root *log_root;
1a40e23b 995 struct btrfs_root *reloc_root;
31153d81 996
62e2749e
CM
997 struct btrfs_root_item root_item;
998 struct btrfs_key root_key;
9f5fae2f 999 struct btrfs_fs_info *fs_info;
d0c803c4
CM
1000 struct extent_io_tree dirty_log_pages;
1001
58176a96
JB
1002 struct kobject root_kobj;
1003 struct completion kobj_unregister;
a2135011 1004 struct mutex objectid_mutex;
7237f183 1005
e02119d5 1006 struct mutex log_mutex;
7237f183
YZ
1007 wait_queue_head_t log_writer_wait;
1008 wait_queue_head_t log_commit_wait[2];
1009 atomic_t log_writers;
1010 atomic_t log_commit[2];
1011 unsigned long log_transid;
1012 unsigned long log_batch;
ff782e0a
JB
1013 pid_t log_start_pid;
1014 bool log_multiple_pids;
ea8c2819 1015
0f7d52f4
CM
1016 u64 objectid;
1017 u64 last_trans;
5f39d397
CM
1018
1019 /* data allocations are done in sectorsize units */
1020 u32 sectorsize;
1021
1022 /* node allocations are done in nodesize units */
1023 u32 nodesize;
1024
1025 /* leaf allocations are done in leafsize units */
1026 u32 leafsize;
1027
87ee04eb
CM
1028 u32 stripesize;
1029
9f5fae2f 1030 u32 type;
13a8a7c8
YZ
1031
1032 u64 highest_objectid;
9f3a7427 1033 int ref_cows;
0b86a832 1034 int track_dirty;
4df27c4d
YZ
1035 int in_radix;
1036
3f157a2f 1037 u64 defrag_trans_start;
6702ed49 1038 struct btrfs_key defrag_progress;
0ef3e66b 1039 struct btrfs_key defrag_max;
6702ed49
CM
1040 int defrag_running;
1041 int defrag_level;
58176a96 1042 char *name;
4313b399 1043 int in_sysfs;
0b86a832
CM
1044
1045 /* the dirty list is only used by non-reference counted roots */
1046 struct list_head dirty_list;
7b128766 1047
5d4f98a2
YZ
1048 struct list_head root_list;
1049
bcc63abb 1050 spinlock_t list_lock;
7b128766 1051 struct list_head orphan_list;
3394e160 1052
5d4f98a2
YZ
1053 spinlock_t inode_lock;
1054 /* red-black tree that keeps track of in-memory inodes */
1055 struct rb_root inode_tree;
1056
3394e160
CM
1057 /*
1058 * right now this just gets used so that a root has its own devid
1059 * for stat. It may be used for more later
1060 */
1061 struct super_block anon_super;
62e2749e
CM
1062};
1063
1e1d2701
CM
1064/*
1065 * inode items have the data typically returned from stat and store other
1066 * info about object characteristics. There is one for every file and dir in
1067 * the FS
1068 */
9078a3e1 1069#define BTRFS_INODE_ITEM_KEY 1
0660b5af
CM
1070#define BTRFS_INODE_REF_KEY 12
1071#define BTRFS_XATTR_ITEM_KEY 24
1072#define BTRFS_ORPHAN_ITEM_KEY 48
9078a3e1 1073/* reserve 2-15 close to the inode for later flexibility */
1e1d2701
CM
1074
1075/*
1076 * dir items are the name -> inode pointers in a directory. There is one
1077 * for every name in a directory.
1078 */
0660b5af
CM
1079#define BTRFS_DIR_LOG_ITEM_KEY 60
1080#define BTRFS_DIR_LOG_INDEX_KEY 72
1081#define BTRFS_DIR_ITEM_KEY 84
1082#define BTRFS_DIR_INDEX_KEY 96
1e1d2701 1083/*
9078a3e1 1084 * extent data is for file data
1e1d2701 1085 */
0660b5af 1086#define BTRFS_EXTENT_DATA_KEY 108
d20f7043 1087
f254e52c 1088/*
d20f7043
CM
1089 * extent csums are stored in a separate tree and hold csums for
1090 * an entire extent on disk.
f254e52c 1091 */
d20f7043 1092#define BTRFS_EXTENT_CSUM_KEY 128
f254e52c 1093
1e1d2701 1094/*
d4a78947 1095 * root items point to tree roots. They are typically in the root
1e1d2701
CM
1096 * tree used by the super block to find all the other trees
1097 */
0660b5af
CM
1098#define BTRFS_ROOT_ITEM_KEY 132
1099
1100/*
1101 * root backrefs tie subvols and snapshots to the directory entries that
1102 * reference them
1103 */
1104#define BTRFS_ROOT_BACKREF_KEY 144
1105
1106/*
1107 * root refs make a fast index for listing all of the snapshots and
1108 * subvolumes referenced by a given root. They point directly to the
1109 * directory item in the root that references the subvol
1110 */
1111#define BTRFS_ROOT_REF_KEY 156
1112
1e1d2701
CM
1113/*
1114 * extent items are in the extent map tree. These record which blocks
1115 * are used, and how many references there are to each block
1116 */
0660b5af 1117#define BTRFS_EXTENT_ITEM_KEY 168
5d4f98a2
YZ
1118
1119#define BTRFS_TREE_BLOCK_REF_KEY 176
1120
1121#define BTRFS_EXTENT_DATA_REF_KEY 178
1122
1123#define BTRFS_EXTENT_REF_V0_KEY 180
1124
1125#define BTRFS_SHARED_BLOCK_REF_KEY 182
1126
1127#define BTRFS_SHARED_DATA_REF_KEY 184
9078a3e1
CM
1128
1129/*
1130 * block groups give us hints into the extent allocation trees. Which
1131 * blocks are free etc etc
1132 */
0660b5af 1133#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
9f5fae2f 1134
0660b5af
CM
1135#define BTRFS_DEV_EXTENT_KEY 204
1136#define BTRFS_DEV_ITEM_KEY 216
1137#define BTRFS_CHUNK_ITEM_KEY 228
0b86a832 1138
1e1d2701
CM
1139/*
1140 * string items are for debugging. They just store a short string of
1141 * data in the FS
1142 */
9078a3e1
CM
1143#define BTRFS_STRING_ITEM_KEY 253
1144
21ad10cf
CM
1145#define BTRFS_MOUNT_NODATASUM (1 << 0)
1146#define BTRFS_MOUNT_NODATACOW (1 << 1)
1147#define BTRFS_MOUNT_NOBARRIER (1 << 2)
e18e4809 1148#define BTRFS_MOUNT_SSD (1 << 3)
dfe25020 1149#define BTRFS_MOUNT_DEGRADED (1 << 4)
c8b97818 1150#define BTRFS_MOUNT_COMPRESS (1 << 5)
3a5e1404 1151#define BTRFS_MOUNT_NOTREELOG (1 << 6)
dccae999 1152#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
451d7585 1153#define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
c289811c 1154#define BTRFS_MOUNT_NOSSD (1 << 9)
b6cda9bc
CM
1155
1156#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1157#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1158#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1159 BTRFS_MOUNT_##opt)
b98b6767
Y
1160/*
1161 * Inode flags
1162 */
fdebe2bd
Y
1163#define BTRFS_INODE_NODATASUM (1 << 0)
1164#define BTRFS_INODE_NODATACOW (1 << 1)
1165#define BTRFS_INODE_READONLY (1 << 2)
c8b97818 1166#define BTRFS_INODE_NOCOMPRESS (1 << 3)
d899e052 1167#define BTRFS_INODE_PREALLOC (1 << 4)
6cbff00f
CH
1168#define BTRFS_INODE_SYNC (1 << 5)
1169#define BTRFS_INODE_IMMUTABLE (1 << 6)
1170#define BTRFS_INODE_APPEND (1 << 7)
1171#define BTRFS_INODE_NODUMP (1 << 8)
1172#define BTRFS_INODE_NOATIME (1 << 9)
1173#define BTRFS_INODE_DIRSYNC (1 << 10)
1174
1175
5f39d397
CM
1176/* some macros to generate set/get funcs for the struct fields. This
1177 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1178 * one for u8:
1179 */
1180#define le8_to_cpu(v) (v)
1181#define cpu_to_le8(v) (v)
1182#define __le8 u8
1183
1184#define read_eb_member(eb, ptr, type, member, result) ( \
1185 read_extent_buffer(eb, (char *)(result), \
1186 ((unsigned long)(ptr)) + \
1187 offsetof(type, member), \
1188 sizeof(((type *)0)->member)))
1189
1190#define write_eb_member(eb, ptr, type, member, result) ( \
1191 write_extent_buffer(eb, (char *)(result), \
1192 ((unsigned long)(ptr)) + \
1193 offsetof(type, member), \
1194 sizeof(((type *)0)->member)))
1195
0f82731f 1196#ifndef BTRFS_SETGET_FUNCS
5f39d397 1197#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
0f82731f
CM
1198u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1199void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1200#endif
5f39d397
CM
1201
1202#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1203static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1204{ \
df68b8a7
DM
1205 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1206 u##bits res = le##bits##_to_cpu(p->member); \
1207 kunmap_atomic(p, KM_USER0); \
810191ff 1208 return res; \
5f39d397
CM
1209} \
1210static inline void btrfs_set_##name(struct extent_buffer *eb, \
1211 u##bits val) \
1212{ \
df68b8a7
DM
1213 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1214 p->member = cpu_to_le##bits(val); \
1215 kunmap_atomic(p, KM_USER0); \
5f39d397 1216}
9078a3e1 1217
5f39d397
CM
1218#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1219static inline u##bits btrfs_##name(type *s) \
1220{ \
1221 return le##bits##_to_cpu(s->member); \
1222} \
1223static inline void btrfs_set_##name(type *s, u##bits val) \
1224{ \
1225 s->member = cpu_to_le##bits(val); \
1e1d2701
CM
1226}
1227
0b86a832
CM
1228BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1229BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1230BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1231BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1232BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
c3027eb5
CM
1233BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1234 start_offset, 64);
0b86a832
CM
1235BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1236BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
e17cade2
CM
1237BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1238BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1239BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2b82032c 1240BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
0b86a832 1241
8a4b83cc
CM
1242BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1243BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1244 total_bytes, 64);
1245BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1246 bytes_used, 64);
1247BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1248 io_align, 32);
1249BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1250 io_width, 32);
1251BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1252 sector_size, 32);
1253BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
e17cade2
CM
1254BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1255 dev_group, 32);
1256BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1257 seek_speed, 8);
1258BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1259 bandwidth, 8);
2b82032c
YZ
1260BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1261 generation, 64);
8a4b83cc 1262
0b86a832
CM
1263static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1264{
1265 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1266}
1267
2b82032c
YZ
1268static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1269{
1270 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1271}
1272
e17cade2 1273BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
0b86a832
CM
1274BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1275BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1276BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1277BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1278BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1279BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1280BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
321aecc6 1281BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
0b86a832
CM
1282BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1283BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1284
e17cade2
CM
1285static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1286{
1287 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1288}
1289
1290BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
0b86a832
CM
1291BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1292BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1293 stripe_len, 64);
1294BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1295 io_align, 32);
1296BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1297 io_width, 32);
1298BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1299 sector_size, 32);
1300BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1301BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1302 num_stripes, 16);
321aecc6
CM
1303BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1304 sub_stripes, 16);
0b86a832
CM
1305BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1306BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1307
1308static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1309 int nr)
1310{
1311 unsigned long offset = (unsigned long)c;
1312 offset += offsetof(struct btrfs_chunk, stripe);
1313 offset += nr * sizeof(struct btrfs_stripe);
1314 return (struct btrfs_stripe *)offset;
1315}
1316
a443755f
CM
1317static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1318{
1319 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1320}
1321
0b86a832
CM
1322static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1323 struct btrfs_chunk *c, int nr)
1324{
1325 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1326}
1327
1328static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1329 struct btrfs_chunk *c, int nr,
1330 u64 val)
1331{
1332 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1333}
1334
1335static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1336 struct btrfs_chunk *c, int nr)
1337{
1338 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1339}
1340
1341static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1342 struct btrfs_chunk *c, int nr,
1343 u64 val)
1344{
1345 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1346}
1347
5f39d397
CM
1348/* struct btrfs_block_group_item */
1349BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1350 used, 64);
1351BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1352 used, 64);
0b86a832
CM
1353BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1354 struct btrfs_block_group_item, chunk_objectid, 64);
e17cade2
CM
1355
1356BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
0b86a832
CM
1357 struct btrfs_block_group_item, chunk_objectid, 64);
1358BTRFS_SETGET_FUNCS(disk_block_group_flags,
1359 struct btrfs_block_group_item, flags, 64);
1360BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1361 struct btrfs_block_group_item, flags, 64);
1e1d2701 1362
3954401f
CM
1363/* struct btrfs_inode_ref */
1364BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
aec7477b 1365BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
3954401f 1366
5f39d397
CM
1367/* struct btrfs_inode_item */
1368BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
c3027eb5 1369BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
e02119d5 1370BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
5f39d397 1371BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
a76a3cd4 1372BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
5f39d397
CM
1373BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1374BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1375BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1376BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1377BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
0b86a832 1378BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
f2b636e8 1379BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1e1d2701 1380
0b86a832 1381static inline struct btrfs_timespec *
5f39d397 1382btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1e1d2701 1383{
5f39d397
CM
1384 unsigned long ptr = (unsigned long)inode_item;
1385 ptr += offsetof(struct btrfs_inode_item, atime);
0b86a832 1386 return (struct btrfs_timespec *)ptr;
1e1d2701
CM
1387}
1388
0b86a832 1389static inline struct btrfs_timespec *
5f39d397 1390btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1e1d2701 1391{
5f39d397
CM
1392 unsigned long ptr = (unsigned long)inode_item;
1393 ptr += offsetof(struct btrfs_inode_item, mtime);
0b86a832 1394 return (struct btrfs_timespec *)ptr;
1e1d2701
CM
1395}
1396
0b86a832 1397static inline struct btrfs_timespec *
5f39d397 1398btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1e1d2701 1399{
5f39d397
CM
1400 unsigned long ptr = (unsigned long)inode_item;
1401 ptr += offsetof(struct btrfs_inode_item, ctime);
0b86a832 1402 return (struct btrfs_timespec *)ptr;
1e1d2701
CM
1403}
1404
0b86a832 1405static inline struct btrfs_timespec *
5f39d397 1406btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1e1d2701 1407{
5f39d397
CM
1408 unsigned long ptr = (unsigned long)inode_item;
1409 ptr += offsetof(struct btrfs_inode_item, otime);
0b86a832 1410 return (struct btrfs_timespec *)ptr;
1e1d2701
CM
1411}
1412
0b86a832
CM
1413BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1414BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
e20d96d6 1415
0b86a832 1416/* struct btrfs_dev_extent */
e17cade2
CM
1417BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1418 chunk_tree, 64);
1419BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1420 chunk_objectid, 64);
1421BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1422 chunk_offset, 64);
0b86a832
CM
1423BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1424
e17cade2
CM
1425static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1426{
1427 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1428 return (u8 *)((unsigned long)dev + ptr);
1429}
1430
5d4f98a2
YZ
1431BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1432BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1433 generation, 64);
1434BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
74493f7a 1435
5d4f98a2
YZ
1436BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1437
1438
1439BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1440
1441static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1442 struct btrfs_tree_block_info *item,
1443 struct btrfs_disk_key *key)
1444{
1445 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1446}
1447
1448static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1449 struct btrfs_tree_block_info *item,
1450 struct btrfs_disk_key *key)
1451{
1452 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1453}
e20d96d6 1454
5d4f98a2
YZ
1455BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1456 root, 64);
1457BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1458 objectid, 64);
1459BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1460 offset, 64);
1461BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1462 count, 32);
1463
1464BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1465 count, 32);
1466
1467BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1468 type, 8);
1469BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1470 offset, 64);
1471
1472static inline u32 btrfs_extent_inline_ref_size(int type)
1473{
1474 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1475 type == BTRFS_SHARED_BLOCK_REF_KEY)
1476 return sizeof(struct btrfs_extent_inline_ref);
1477 if (type == BTRFS_SHARED_DATA_REF_KEY)
1478 return sizeof(struct btrfs_shared_data_ref) +
1479 sizeof(struct btrfs_extent_inline_ref);
1480 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1481 return sizeof(struct btrfs_extent_data_ref) +
1482 offsetof(struct btrfs_extent_inline_ref, offset);
1483 BUG();
1484 return 0;
1485}
1486
1487BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1488BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1489 generation, 64);
1490BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1491BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
e20d96d6 1492
5f39d397
CM
1493/* struct btrfs_node */
1494BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
74493f7a 1495BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
e20d96d6 1496
5f39d397 1497static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
cf27e1ee 1498{
5f39d397
CM
1499 unsigned long ptr;
1500 ptr = offsetof(struct btrfs_node, ptrs) +
1501 sizeof(struct btrfs_key_ptr) * nr;
1502 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
cf27e1ee
CM
1503}
1504
5f39d397
CM
1505static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1506 int nr, u64 val)
cf27e1ee 1507{
5f39d397
CM
1508 unsigned long ptr;
1509 ptr = offsetof(struct btrfs_node, ptrs) +
1510 sizeof(struct btrfs_key_ptr) * nr;
1511 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
cf27e1ee
CM
1512}
1513
74493f7a
CM
1514static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1515{
1516 unsigned long ptr;
1517 ptr = offsetof(struct btrfs_node, ptrs) +
1518 sizeof(struct btrfs_key_ptr) * nr;
1519 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1520}
1521
1522static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1523 int nr, u64 val)
1524{
1525 unsigned long ptr;
1526 ptr = offsetof(struct btrfs_node, ptrs) +
1527 sizeof(struct btrfs_key_ptr) * nr;
1528 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1529}
1530
810191ff 1531static inline unsigned long btrfs_node_key_ptr_offset(int nr)
4d775673 1532{
5f39d397
CM
1533 return offsetof(struct btrfs_node, ptrs) +
1534 sizeof(struct btrfs_key_ptr) * nr;
4d775673
CM
1535}
1536
e644d021
CM
1537void btrfs_node_key(struct extent_buffer *eb,
1538 struct btrfs_disk_key *disk_key, int nr);
1539
5f39d397
CM
1540static inline void btrfs_set_node_key(struct extent_buffer *eb,
1541 struct btrfs_disk_key *disk_key, int nr)
1d4f8a0c 1542{
5f39d397
CM
1543 unsigned long ptr;
1544 ptr = btrfs_node_key_ptr_offset(nr);
1545 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1546 struct btrfs_key_ptr, key, disk_key);
1d4f8a0c
CM
1547}
1548
5f39d397
CM
1549/* struct btrfs_item */
1550BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1551BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
4d775673 1552
5f39d397 1553static inline unsigned long btrfs_item_nr_offset(int nr)
1d4f8a0c 1554{
5f39d397
CM
1555 return offsetof(struct btrfs_leaf, items) +
1556 sizeof(struct btrfs_item) * nr;
1d4f8a0c
CM
1557}
1558
5f39d397
CM
1559static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1560 int nr)
0783fcfc 1561{
5f39d397 1562 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
0783fcfc
CM
1563}
1564
5f39d397
CM
1565static inline u32 btrfs_item_end(struct extent_buffer *eb,
1566 struct btrfs_item *item)
0783fcfc 1567{
5f39d397 1568 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
0783fcfc
CM
1569}
1570
5f39d397 1571static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
0783fcfc 1572{
5f39d397 1573 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
0783fcfc
CM
1574}
1575
5f39d397 1576static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
0783fcfc 1577{
5f39d397 1578 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
0783fcfc
CM
1579}
1580
5f39d397 1581static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
0783fcfc 1582{
5f39d397 1583 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
0783fcfc
CM
1584}
1585
5f39d397
CM
1586static inline void btrfs_item_key(struct extent_buffer *eb,
1587 struct btrfs_disk_key *disk_key, int nr)
1d4f6404 1588{
5f39d397
CM
1589 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1590 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1d4f6404
CM
1591}
1592
5f39d397
CM
1593static inline void btrfs_set_item_key(struct extent_buffer *eb,
1594 struct btrfs_disk_key *disk_key, int nr)
1d4f6404 1595{
5f39d397
CM
1596 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1597 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1d4f6404
CM
1598}
1599
e02119d5
CM
1600BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1601
0660b5af
CM
1602/*
1603 * struct btrfs_root_ref
1604 */
1605BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1606BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1607BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1608
5f39d397 1609/* struct btrfs_dir_item */
5103e947 1610BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
5f39d397
CM
1611BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1612BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
e02119d5 1613BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1d4f6404 1614
5f39d397
CM
1615static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1616 struct btrfs_dir_item *item,
1617 struct btrfs_disk_key *key)
1d4f6404 1618{
5f39d397 1619 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1d4f6404
CM
1620}
1621
5f39d397
CM
1622static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1623 struct btrfs_dir_item *item,
1624 struct btrfs_disk_key *key)
a8a2ee0c 1625{
5f39d397 1626 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
a8a2ee0c
CM
1627}
1628
5f39d397
CM
1629/* struct btrfs_disk_key */
1630BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1631 objectid, 64);
1632BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1633BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1d4f6404 1634
e2fa7227
CM
1635static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1636 struct btrfs_disk_key *disk)
1637{
1638 cpu->offset = le64_to_cpu(disk->offset);
5f39d397 1639 cpu->type = disk->type;
e2fa7227
CM
1640 cpu->objectid = le64_to_cpu(disk->objectid);
1641}
1642
1643static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1644 struct btrfs_key *cpu)
1645{
1646 disk->offset = cpu_to_le64(cpu->offset);
5f39d397 1647 disk->type = cpu->type;
e2fa7227
CM
1648 disk->objectid = cpu_to_le64(cpu->objectid);
1649}
1650
5f39d397
CM
1651static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1652 struct btrfs_key *key, int nr)
7f5c1516 1653{
5f39d397
CM
1654 struct btrfs_disk_key disk_key;
1655 btrfs_node_key(eb, &disk_key, nr);
1656 btrfs_disk_key_to_cpu(key, &disk_key);
7f5c1516
CM
1657}
1658
5f39d397
CM
1659static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1660 struct btrfs_key *key, int nr)
7f5c1516 1661{
5f39d397
CM
1662 struct btrfs_disk_key disk_key;
1663 btrfs_item_key(eb, &disk_key, nr);
1664 btrfs_disk_key_to_cpu(key, &disk_key);
7f5c1516
CM
1665}
1666
5f39d397
CM
1667static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1668 struct btrfs_dir_item *item,
1669 struct btrfs_key *key)
4d775673 1670{
5f39d397
CM
1671 struct btrfs_disk_key disk_key;
1672 btrfs_dir_item_key(eb, item, &disk_key);
1673 btrfs_disk_key_to_cpu(key, &disk_key);
4d775673
CM
1674}
1675
58176a96 1676
5f39d397 1677static inline u8 btrfs_key_type(struct btrfs_key *key)
3768f368 1678{
5f39d397 1679 return key->type;
3768f368
CM
1680}
1681
5f39d397 1682static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
3768f368 1683{
5f39d397 1684 key->type = val;
3768f368
CM
1685}
1686
5f39d397 1687/* struct btrfs_header */
db94535d 1688BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
5f39d397
CM
1689BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1690 generation, 64);
1691BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1692BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
63b10fc4 1693BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
5f39d397 1694BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
0f7d52f4 1695
63b10fc4
CM
1696static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1697{
1698 return (btrfs_header_flags(eb) & flag) == flag;
1699}
1700
1701static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1702{
1703 u64 flags = btrfs_header_flags(eb);
1704 btrfs_set_header_flags(eb, flags | flag);
1705 return (flags & flag) == flag;
1706}
1707
1708static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1709{
1710 u64 flags = btrfs_header_flags(eb);
1711 btrfs_set_header_flags(eb, flags & ~flag);
1712 return (flags & flag) == flag;
1713}
1714
5d4f98a2
YZ
1715static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1716{
1717 u64 flags = btrfs_header_flags(eb);
1718 return flags >> BTRFS_BACKREF_REV_SHIFT;
1719}
1720
1721static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1722 int rev)
1723{
1724 u64 flags = btrfs_header_flags(eb);
1725 flags &= ~BTRFS_BACKREF_REV_MASK;
1726 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1727 btrfs_set_header_flags(eb, flags);
1728}
1729
5f39d397 1730static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
0f7d52f4 1731{
5f39d397
CM
1732 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1733 return (u8 *)ptr;
0f7d52f4
CM
1734}
1735
e17cade2
CM
1736static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1737{
1738 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1739 return (u8 *)ptr;
1740}
1741
5f39d397 1742static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
3768f368 1743{
5f39d397
CM
1744 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1745 return (u8 *)ptr;
3768f368
CM
1746}
1747
5f39d397 1748static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
3768f368 1749{
5f39d397
CM
1750 unsigned long ptr = offsetof(struct btrfs_header, csum);
1751 return (u8 *)ptr;
3768f368
CM
1752}
1753
5f39d397 1754static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
3768f368 1755{
5f39d397 1756 return NULL;
3768f368
CM
1757}
1758
5f39d397 1759static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
3768f368 1760{
5f39d397 1761 return NULL;
3768f368
CM
1762}
1763
5f39d397 1764static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
3768f368 1765{
5f39d397 1766 return NULL;
3768f368
CM
1767}
1768
5f39d397 1769static inline int btrfs_is_leaf(struct extent_buffer *eb)
3768f368 1770{
d397712b 1771 return btrfs_header_level(eb) == 0;
3768f368
CM
1772}
1773
5f39d397 1774/* struct btrfs_root_item */
84234f3a
YZ
1775BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1776 generation, 64);
5f39d397 1777BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
db94535d
CM
1778BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1779BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
3768f368 1780
84234f3a
YZ
1781BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1782 generation, 64);
db94535d
CM
1783BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1784BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
5f39d397
CM
1785BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1786BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
f2b636e8 1787BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
db94535d
CM
1788BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1789BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
80ff3856
YZ
1790BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1791 last_snapshot, 64);
123abc88 1792
5f39d397 1793/* struct btrfs_super_block */
607d432d 1794
db94535d 1795BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
a061fc8d 1796BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
5f39d397
CM
1797BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1798 generation, 64);
1799BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
0b86a832
CM
1800BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1801 struct btrfs_super_block, sys_chunk_array_size, 32);
84234f3a
YZ
1802BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1803 struct btrfs_super_block, chunk_root_generation, 64);
db94535d
CM
1804BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1805 root_level, 8);
0b86a832
CM
1806BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1807 chunk_root, 64);
1808BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
e02119d5
CM
1809 chunk_root_level, 8);
1810BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1811 log_root, 64);
c3027eb5
CM
1812BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1813 log_root_transid, 64);
e02119d5
CM
1814BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1815 log_root_level, 8);
db94535d
CM
1816BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1817 total_bytes, 64);
1818BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1819 bytes_used, 64);
5f39d397
CM
1820BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1821 sectorsize, 32);
1822BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1823 nodesize, 32);
1824BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1825 leafsize, 32);
87ee04eb
CM
1826BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1827 stripesize, 32);
5f39d397
CM
1828BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1829 root_dir_objectid, 64);
8a4b83cc
CM
1830BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1831 num_devices, 64);
f2b636e8
JB
1832BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1833 compat_flags, 64);
1834BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1835 compat_flags, 64);
1836BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1837 incompat_flags, 64);
607d432d
JB
1838BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1839 csum_type, 16);
1840
1841static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1842{
1843 int t = btrfs_super_csum_type(s);
1844 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1845 return btrfs_csum_sizes[t];
1846}
2e635a27 1847
5f39d397 1848static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2e635a27 1849{
5f39d397 1850 return offsetof(struct btrfs_leaf, items);
2e635a27
CM
1851}
1852
5f39d397
CM
1853/* struct btrfs_file_extent_item */
1854BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
9f5fae2f 1855
d397712b
CM
1856static inline unsigned long
1857btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
236454df 1858{
5f39d397 1859 unsigned long offset = (unsigned long)e;
db94535d 1860 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
5f39d397 1861 return offset;
236454df
CM
1862}
1863
1864static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1865{
db94535d 1866 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
9f5fae2f
CM
1867}
1868
db94535d
CM
1869BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1870 disk_bytenr, 64);
5f39d397
CM
1871BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1872 generation, 64);
db94535d
CM
1873BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1874 disk_num_bytes, 64);
5f39d397
CM
1875BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1876 offset, 64);
db94535d
CM
1877BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1878 num_bytes, 64);
c8b97818
CM
1879BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1880 ram_bytes, 64);
1881BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1882 compression, 8);
1883BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1884 encryption, 8);
1885BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1886 other_encoding, 16);
1887
1888/* this returns the number of file bytes represented by the inline item.
1889 * If an item is compressed, this is the uncompressed size
1890 */
1891static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1892 struct btrfs_file_extent_item *e)
1893{
1894 return btrfs_file_extent_ram_bytes(eb, e);
1895}
1896
1897/*
1898 * this returns the number of bytes used by the item on disk, minus the
1899 * size of any extent headers. If a file is compressed on disk, this is
1900 * the compressed size
1901 */
1902static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1903 struct btrfs_item *e)
1904{
1905 unsigned long offset;
1906 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1907 return btrfs_item_size(eb, e) - offset;
1908}
9f5fae2f 1909
e20d96d6
CM
1910static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1911{
1912 return sb->s_fs_info;
1913}
1914
58176a96
JB
1915static inline int btrfs_set_root_name(struct btrfs_root *root,
1916 const char *name, int len)
1917{
1918 /* if we already have a name just free it */
d397712b 1919 kfree(root->name);
58176a96
JB
1920
1921 root->name = kmalloc(len+1, GFP_KERNEL);
1922 if (!root->name)
1923 return -ENOMEM;
1924
1925 memcpy(root->name, name, len);
d397712b 1926 root->name[len] = '\0';
58176a96
JB
1927
1928 return 0;
1929}
1930
d397712b
CM
1931static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
1932{
db94535d
CM
1933 if (level == 0)
1934 return root->leafsize;
1935 return root->nodesize;
1936}
1937
4beb1b8b
CM
1938/* helper function to cast into the data area of the leaf. */
1939#define btrfs_item_ptr(leaf, slot, type) \
123abc88 1940 ((type *)(btrfs_leaf_data(leaf) + \
5f39d397
CM
1941 btrfs_item_offset_nr(leaf, slot)))
1942
1943#define btrfs_item_ptr_offset(leaf, slot) \
1944 ((unsigned long)(btrfs_leaf_data(leaf) + \
1945 btrfs_item_offset_nr(leaf, slot)))
4beb1b8b 1946
2b1f55b0
CM
1947static inline struct dentry *fdentry(struct file *file)
1948{
6da6abae 1949 return file->f_path.dentry;
6da6abae
CM
1950}
1951
b18c6685 1952/* extent-tree.c */
fa9c0d79 1953void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
56bec294
CM
1954int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
1955 struct btrfs_root *root, unsigned long count);
31840ae1 1956int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
11833d66
YZ
1957int btrfs_pin_extent(struct btrfs_root *root,
1958 u64 bytenr, u64 num, int reserved);
e02119d5
CM
1959int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1960 struct btrfs_root *root, struct extent_buffer *leaf);
80ff3856 1961int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
5d4f98a2
YZ
1962 struct btrfs_root *root,
1963 u64 objectid, u64 offset, u64 bytenr);
d1310b2e 1964int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
d397712b
CM
1965struct btrfs_block_group_cache *btrfs_lookup_block_group(
1966 struct btrfs_fs_info *info,
1967 u64 bytenr);
5d4f98a2 1968void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
d2fb3437
YZ
1969u64 btrfs_find_block_group(struct btrfs_root *root,
1970 u64 search_start, u64 search_hint, int owner);
5f39d397 1971struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
5d4f98a2
YZ
1972 struct btrfs_root *root, u32 blocksize,
1973 u64 parent, u64 root_objectid,
1974 struct btrfs_disk_key *key, int level,
1975 u64 hint, u64 empty_size);
65b51a00
CM
1976struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1977 struct btrfs_root *root,
4008c04a
CM
1978 u64 bytenr, u32 blocksize,
1979 int level);
5d4f98a2
YZ
1980int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
1981 struct btrfs_root *root,
1982 u64 root_objectid, u64 owner,
1983 u64 offset, struct btrfs_key *ins);
1984int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
1985 struct btrfs_root *root,
1986 u64 root_objectid, u64 owner, u64 offset,
1987 struct btrfs_key *ins);
e6dcd2dc
CM
1988int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1989 struct btrfs_root *root,
1990 u64 num_bytes, u64 min_alloc_size,
1991 u64 empty_size, u64 hint_byte,
1992 u64 search_end, struct btrfs_key *ins,
1993 u64 data);
e089f05c 1994int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
5d4f98a2
YZ
1995 struct extent_buffer *buf, int full_backref);
1996int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1997 struct extent_buffer *buf, int full_backref);
1998int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
1999 struct btrfs_root *root,
2000 u64 bytenr, u64 num_bytes, u64 flags,
2001 int is_data);
31840ae1
ZY
2002int btrfs_free_extent(struct btrfs_trans_handle *trans,
2003 struct btrfs_root *root,
2004 u64 bytenr, u64 num_bytes, u64 parent,
5d4f98a2
YZ
2005 u64 root_objectid, u64 owner, u64 offset);
2006
65b51a00 2007int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
11833d66
YZ
2008int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2009 struct btrfs_root *root);
ccd467d6 2010int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
11833d66 2011 struct btrfs_root *root);
b18c6685 2012int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
31840ae1
ZY
2013 struct btrfs_root *root,
2014 u64 bytenr, u64 num_bytes, u64 parent,
5d4f98a2
YZ
2015 u64 root_objectid, u64 owner, u64 offset);
2016
9078a3e1
CM
2017int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2018 struct btrfs_root *root);
d2fb3437 2019int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
9078a3e1
CM
2020int btrfs_free_block_groups(struct btrfs_fs_info *info);
2021int btrfs_read_block_groups(struct btrfs_root *root);
ba1bf481 2022int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
0b86a832
CM
2023int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2024 struct btrfs_root *root, u64 bytes_used,
e17cade2 2025 u64 type, u64 chunk_objectid, u64 chunk_offset,
0b86a832 2026 u64 size);
1a40e23b
ZY
2027int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2028 struct btrfs_root *root, u64 group_start);
5d4f98a2
YZ
2029int btrfs_prepare_block_group_relocation(struct btrfs_root *root,
2030 struct btrfs_block_group_cache *group);
2031
2b82032c 2032u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
6a63209f 2033void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
4184ea7f
CM
2034void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2035
9ed74f2d
JB
2036int btrfs_reserve_metadata_space(struct btrfs_root *root, int num_items);
2037int btrfs_unreserve_metadata_space(struct btrfs_root *root, int num_items);
2038int btrfs_unreserve_metadata_for_delalloc(struct btrfs_root *root,
2039 struct inode *inode, int num_items);
2040int btrfs_reserve_metadata_for_delalloc(struct btrfs_root *root,
2041 struct inode *inode, int num_items);
6a63209f
JB
2042int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode,
2043 u64 bytes);
2044void btrfs_free_reserved_data_space(struct btrfs_root *root,
2045 struct inode *inode, u64 bytes);
2046void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode,
2047 u64 bytes);
2048void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode,
2049 u64 bytes);
dee26a9f 2050/* ctree.c */
5d4f98a2
YZ
2051int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2052 int level, int *slot);
2053int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
0b86a832
CM
2054int btrfs_previous_item(struct btrfs_root *root,
2055 struct btrfs_path *path, u64 min_objectid,
2056 int type);
31840ae1
ZY
2057int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2058 struct btrfs_root *root, struct btrfs_path *path,
2059 struct btrfs_key *new_key);
925baedd
CM
2060struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2061struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
e7a84565 2062int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3f157a2f
CM
2063 struct btrfs_key *key, int lowest_level,
2064 int cache_only, u64 min_trans);
2065int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
e02119d5 2066 struct btrfs_key *max_key,
3f157a2f
CM
2067 struct btrfs_path *path, int cache_only,
2068 u64 min_trans);
5f39d397
CM
2069int btrfs_cow_block(struct btrfs_trans_handle *trans,
2070 struct btrfs_root *root, struct extent_buffer *buf,
2071 struct extent_buffer *parent, int parent_slot,
9fa8cfe7 2072 struct extent_buffer **cow_ret);
be20aa9d
CM
2073int btrfs_copy_root(struct btrfs_trans_handle *trans,
2074 struct btrfs_root *root,
2075 struct extent_buffer *buf,
2076 struct extent_buffer **cow_ret, u64 new_root_objectid);
5d4f98a2
YZ
2077int btrfs_block_can_be_shared(struct btrfs_root *root,
2078 struct extent_buffer *buf);
6567e837
CM
2079int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2080 *root, struct btrfs_path *path, u32 data_size);
b18c6685
CM
2081int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2082 struct btrfs_root *root,
2083 struct btrfs_path *path,
179e29e4 2084 u32 new_size, int from_end);
459931ec
CM
2085int btrfs_split_item(struct btrfs_trans_handle *trans,
2086 struct btrfs_root *root,
2087 struct btrfs_path *path,
2088 struct btrfs_key *new_key,
2089 unsigned long split_offset);
e089f05c
CM
2090int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2091 *root, struct btrfs_key *key, struct btrfs_path *p, int
2092 ins_len, int cow);
6702ed49 2093int btrfs_realloc_node(struct btrfs_trans_handle *trans,
5f39d397 2094 struct btrfs_root *root, struct extent_buffer *parent,
a6b6e75e
CM
2095 int start_slot, int cache_only, u64 *last_ret,
2096 struct btrfs_key *progress);
234b63a0 2097void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
2c90e5d6
CM
2098struct btrfs_path *btrfs_alloc_path(void);
2099void btrfs_free_path(struct btrfs_path *p);
b4ce94de 2100void btrfs_set_path_blocking(struct btrfs_path *p);
b4ce94de
CM
2101void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2102
85e21bac
CM
2103int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2104 struct btrfs_path *path, int slot, int nr);
85e21bac
CM
2105static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2106 struct btrfs_root *root,
2107 struct btrfs_path *path)
2108{
2109 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2110}
2111
e089f05c
CM
2112int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2113 *root, struct btrfs_key *key, void *data, u32 data_size);
f3465ca4
JB
2114int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
2115 struct btrfs_root *root,
2116 struct btrfs_path *path,
2117 struct btrfs_key *cpu_key, u32 *data_size,
2118 int nr);
9c58309d
CM
2119int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2120 struct btrfs_root *root,
2121 struct btrfs_path *path,
2122 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2123
2124static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2125 struct btrfs_root *root,
2126 struct btrfs_path *path,
2127 struct btrfs_key *key,
2128 u32 data_size)
2129{
2130 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2131}
2132
234b63a0 2133int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
7bb86316 2134int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
5f39d397 2135int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2c47e605 2136int btrfs_drop_snapshot(struct btrfs_root *root, int update_ref);
f82d02d9
YZ
2137int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2138 struct btrfs_root *root,
2139 struct extent_buffer *node,
2140 struct extent_buffer *parent);
dee26a9f 2141/* root-item.c */
ea9e8b11 2142int btrfs_find_root_ref(struct btrfs_root *tree_root,
4df27c4d
YZ
2143 struct btrfs_path *path,
2144 u64 root_id, u64 ref_id);
0660b5af
CM
2145int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2146 struct btrfs_root *tree_root,
4df27c4d
YZ
2147 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2148 const char *name, int name_len);
2149int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2150 struct btrfs_root *tree_root,
2151 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
0660b5af 2152 const char *name, int name_len);
e089f05c
CM
2153int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2154 struct btrfs_key *key);
2155int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2156 *root, struct btrfs_key *key, struct btrfs_root_item
2157 *item);
2158int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2159 *root, struct btrfs_key *key, struct btrfs_root_item
2160 *item);
2161int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2162 btrfs_root_item *item, struct btrfs_key *key);
bf4ef679
CM
2163int btrfs_search_root(struct btrfs_root *root, u64 search_start,
2164 u64 *found_objectid);
5d4f98a2 2165int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
76dda93c 2166int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
5d4f98a2
YZ
2167int btrfs_set_root_node(struct btrfs_root_item *item,
2168 struct extent_buffer *node);
dee26a9f 2169/* dir-item.c */
d397712b
CM
2170int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2171 struct btrfs_root *root, const char *name,
2172 int name_len, u64 dir,
aec7477b 2173 struct btrfs_key *location, u8 type, u64 index);
7e38180e
CM
2174struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2175 struct btrfs_root *root,
2176 struct btrfs_path *path, u64 dir,
2177 const char *name, int name_len,
2178 int mod);
2179struct btrfs_dir_item *
2180btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2181 struct btrfs_root *root,
2182 struct btrfs_path *path, u64 dir,
2183 u64 objectid, const char *name, int name_len,
2184 int mod);
4df27c4d
YZ
2185struct btrfs_dir_item *
2186btrfs_search_dir_index_item(struct btrfs_root *root,
2187 struct btrfs_path *path, u64 dirid,
2188 const char *name, int name_len);
7e38180e
CM
2189struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2190 struct btrfs_path *path,
7f5c1516 2191 const char *name, int name_len);
7e38180e
CM
2192int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2193 struct btrfs_root *root,
2194 struct btrfs_path *path,
2195 struct btrfs_dir_item *di);
5103e947
JB
2196int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2197 struct btrfs_root *root, const char *name,
2198 u16 name_len, const void *data, u16 data_len,
2199 u64 dir);
2200struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2201 struct btrfs_root *root,
2202 struct btrfs_path *path, u64 dir,
2203 const char *name, u16 name_len,
2204 int mod);
7b128766
JB
2205
2206/* orphan.c */
2207int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2208 struct btrfs_root *root, u64 offset);
2209int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2210 struct btrfs_root *root, u64 offset);
4df27c4d 2211int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
7b128766 2212
dee26a9f 2213/* inode-map.c */
9f5fae2f
CM
2214int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2215 struct btrfs_root *fs_root,
2216 u64 dirid, u64 *objectid);
5be6f7f1
CM
2217int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2218
dee26a9f 2219/* inode-item.c */
3954401f
CM
2220int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2221 struct btrfs_root *root,
2222 const char *name, int name_len,
aec7477b 2223 u64 inode_objectid, u64 ref_objectid, u64 index);
3954401f
CM
2224int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2225 struct btrfs_root *root,
2226 const char *name, int name_len,
aec7477b 2227 u64 inode_objectid, u64 ref_objectid, u64 *index);
5f39d397
CM
2228int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2229 struct btrfs_root *root,
2230 struct btrfs_path *path, u64 objectid);
293ffd5f 2231int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
d6e4a428
CM
2232 *root, struct btrfs_path *path,
2233 struct btrfs_key *location, int mod);
dee26a9f
CM
2234
2235/* file-item.c */
459931ec
CM
2236int btrfs_del_csums(struct btrfs_trans_handle *trans,
2237 struct btrfs_root *root, u64 bytenr, u64 len);
61b49440 2238int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
d20f7043 2239 struct bio *bio, u32 *dst);
b18c6685 2240int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
c8b97818
CM
2241 struct btrfs_root *root,
2242 u64 objectid, u64 pos,
2243 u64 disk_offset, u64 disk_num_bytes,
2244 u64 num_bytes, u64 offset, u64 ram_bytes,
2245 u8 compression, u8 encryption, u16 other_encoding);
dee26a9f
CM
2246int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2247 struct btrfs_root *root,
2248 struct btrfs_path *path, u64 objectid,
db94535d 2249 u64 bytenr, int mod);
065631f6 2250int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
d20f7043 2251 struct btrfs_root *root,
e6dcd2dc 2252 struct btrfs_ordered_sum *sums);
3edf7d33 2253int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
d20f7043 2254 struct bio *bio, u64 file_start, int contig);
c8b97818
CM
2255int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
2256 u64 start, unsigned long len);
b18c6685
CM
2257struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2258 struct btrfs_root *root,
2259 struct btrfs_path *path,
d20f7043 2260 u64 bytenr, int cow);
1de037a4
CM
2261int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2262 struct btrfs_root *root, struct btrfs_path *path,
2263 u64 isize);
17d217fe
YZ
2264int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2265 u64 end, struct list_head *list);
39279cc3 2266/* inode.c */
4881ee5a
CM
2267
2268/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
5036f538 2269#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
4881ee5a
CM
2270#define ClearPageChecked ClearPageFsMisc
2271#define SetPageChecked SetPageFsMisc
2272#define PageChecked PageFsMisc
2273#endif
2274
3de4586c
CM
2275struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2276int btrfs_set_inode_index(struct inode *dir, u64 *index);
e02119d5
CM
2277int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2278 struct btrfs_root *root,
2279 struct inode *dir, struct inode *inode,
2280 const char *name, int name_len);
2281int btrfs_add_link(struct btrfs_trans_handle *trans,
2282 struct inode *parent_inode, struct inode *inode,
2283 const char *name, int name_len, int add_backref, u64 index);
4df27c4d
YZ
2284int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2285 struct btrfs_root *root,
2286 struct inode *dir, u64 objectid,
2287 const char *name, int name_len);
e02119d5
CM
2288int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2289 struct btrfs_root *root,
2290 struct inode *inode, u64 new_size,
2291 u32 min_type);
2292
ea8c2819
CM
2293int btrfs_start_delalloc_inodes(struct btrfs_root *root);
2294int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
f421950f
CM
2295int btrfs_writepages(struct address_space *mapping,
2296 struct writeback_control *wbc);
d2fb3437 2297int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
76dda93c 2298 struct btrfs_root *new_root,
d2fb3437 2299 u64 new_dirid, u64 alloc_hint);
239b14b3 2300int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
c8b97818 2301 size_t size, struct bio *bio, unsigned long bio_flags);
239b14b3 2302
edbd8d4e
CM
2303unsigned long btrfs_force_ra(struct address_space *mapping,
2304 struct file_ra_state *ra, struct file *file,
2305 pgoff_t offset, pgoff_t last_index);
c2ec175c 2306int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
9ebefb18 2307int btrfs_readpage(struct file *file, struct page *page);
39279cc3 2308void btrfs_delete_inode(struct inode *inode);
2da98f00 2309void btrfs_put_inode(struct inode *inode);
39279cc3
CM
2310int btrfs_write_inode(struct inode *inode, int wait);
2311void btrfs_dirty_inode(struct inode *inode);
2312struct inode *btrfs_alloc_inode(struct super_block *sb);
2313void btrfs_destroy_inode(struct inode *inode);
76dda93c 2314void btrfs_drop_inode(struct inode *inode);
39279cc3
CM
2315int btrfs_init_cachep(void);
2316void btrfs_destroy_cachep(void);
6bf13c0c 2317long btrfs_ioctl_trans_end(struct file *file);
1a54ef8c 2318struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
5d4f98a2 2319 struct btrfs_root *root);
39279cc3
CM
2320int btrfs_commit_write(struct file *file, struct page *page,
2321 unsigned from, unsigned to);
a52d9a80
CM
2322struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2323 size_t page_offset, u64 start, u64 end,
2324 int create);
2325int btrfs_update_inode(struct btrfs_trans_handle *trans,
2326 struct btrfs_root *root,
2327 struct inode *inode);
5b21f2ed
ZY
2328int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2329int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2330void btrfs_orphan_cleanup(struct btrfs_root *root);
9036c102 2331int btrfs_cont_expand(struct inode *inode, loff_t size);
76dda93c 2332int btrfs_invalidate_inodes(struct btrfs_root *root);
82d339d9 2333extern const struct dentry_operations btrfs_dentry_operations;
f46b5a66
CH
2334
2335/* ioctl.c */
2336long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
6cbff00f
CH
2337void btrfs_update_iflags(struct inode *inode);
2338void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
f46b5a66 2339
39279cc3 2340/* file.c */
e02119d5 2341int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
5b21f2ed
ZY
2342int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2343 int skip_pinned);
5f56406a 2344int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
39279cc3
CM
2345extern struct file_operations btrfs_file_operations;
2346int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2347 struct btrfs_root *root, struct inode *inode,
e980b50c 2348 u64 start, u64 end, u64 locked_end,
a1ed835e 2349 u64 inline_limit, u64 *hint_block, int drop_cache);
d899e052
YZ
2350int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2351 struct btrfs_root *root,
2352 struct inode *inode, u64 start, u64 end);
6bf13c0c
SW
2353int btrfs_release_file(struct inode *inode, struct file *file);
2354
6702ed49
CM
2355/* tree-defrag.c */
2356int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2357 struct btrfs_root *root, int cache_only);
58176a96
JB
2358
2359/* sysfs.c */
2360int btrfs_init_sysfs(void);
2361void btrfs_exit_sysfs(void);
2362int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2363int btrfs_sysfs_add_root(struct btrfs_root *root);
2364void btrfs_sysfs_del_root(struct btrfs_root *root);
2365void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2366
5103e947
JB
2367/* xattr.c */
2368ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
6099afe8 2369
edbd8d4e
CM
2370/* super.c */
2371u64 btrfs_parse_size(char *str);
edf24abe 2372int btrfs_parse_options(struct btrfs_root *root, char *options);
6bf13c0c 2373int btrfs_sync_fs(struct super_block *sb, int wait);
33268eaf
JB
2374
2375/* acl.c */
3baf0bed 2376#ifdef CONFIG_BTRFS_POSIX_ACL
33268eaf 2377int btrfs_check_acl(struct inode *inode, int mask);
7df336ec
AV
2378#else
2379#define btrfs_check_acl NULL
2380#endif
33268eaf
JB
2381int btrfs_init_acl(struct inode *inode, struct inode *dir);
2382int btrfs_acl_chmod(struct inode *inode);
0f9dd46c 2383
5d4f98a2
YZ
2384/* relocation.c */
2385int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2386int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2387 struct btrfs_root *root);
2388int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2389 struct btrfs_root *root);
2390int btrfs_recover_relocation(struct btrfs_root *root);
2391int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
eb60ceac 2392#endif