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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
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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.
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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 */
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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;
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CM
303} __attribute__ ((__packed__));
304
5f39d397 305#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
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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
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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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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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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
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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
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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;
257c62e1 1012 unsigned long last_log_commit;
7237f183 1013 unsigned long log_batch;
ff782e0a
JB
1014 pid_t log_start_pid;
1015 bool log_multiple_pids;
ea8c2819 1016
0f7d52f4
CM
1017 u64 objectid;
1018 u64 last_trans;
5f39d397
CM
1019
1020 /* data allocations are done in sectorsize units */
1021 u32 sectorsize;
1022
1023 /* node allocations are done in nodesize units */
1024 u32 nodesize;
1025
1026 /* leaf allocations are done in leafsize units */
1027 u32 leafsize;
1028
87ee04eb
CM
1029 u32 stripesize;
1030
9f5fae2f 1031 u32 type;
13a8a7c8
YZ
1032
1033 u64 highest_objectid;
9f3a7427 1034 int ref_cows;
0b86a832 1035 int track_dirty;
4df27c4d
YZ
1036 int in_radix;
1037
3f157a2f 1038 u64 defrag_trans_start;
6702ed49 1039 struct btrfs_key defrag_progress;
0ef3e66b 1040 struct btrfs_key defrag_max;
6702ed49
CM
1041 int defrag_running;
1042 int defrag_level;
58176a96 1043 char *name;
4313b399 1044 int in_sysfs;
0b86a832
CM
1045
1046 /* the dirty list is only used by non-reference counted roots */
1047 struct list_head dirty_list;
7b128766 1048
5d4f98a2
YZ
1049 struct list_head root_list;
1050
bcc63abb 1051 spinlock_t list_lock;
7b128766 1052 struct list_head orphan_list;
3394e160 1053
5d4f98a2
YZ
1054 spinlock_t inode_lock;
1055 /* red-black tree that keeps track of in-memory inodes */
1056 struct rb_root inode_tree;
1057
3394e160
CM
1058 /*
1059 * right now this just gets used so that a root has its own devid
1060 * for stat. It may be used for more later
1061 */
1062 struct super_block anon_super;
62e2749e
CM
1063};
1064
1e1d2701
CM
1065/*
1066 * inode items have the data typically returned from stat and store other
1067 * info about object characteristics. There is one for every file and dir in
1068 * the FS
1069 */
9078a3e1 1070#define BTRFS_INODE_ITEM_KEY 1
0660b5af
CM
1071#define BTRFS_INODE_REF_KEY 12
1072#define BTRFS_XATTR_ITEM_KEY 24
1073#define BTRFS_ORPHAN_ITEM_KEY 48
9078a3e1 1074/* reserve 2-15 close to the inode for later flexibility */
1e1d2701
CM
1075
1076/*
1077 * dir items are the name -> inode pointers in a directory. There is one
1078 * for every name in a directory.
1079 */
0660b5af
CM
1080#define BTRFS_DIR_LOG_ITEM_KEY 60
1081#define BTRFS_DIR_LOG_INDEX_KEY 72
1082#define BTRFS_DIR_ITEM_KEY 84
1083#define BTRFS_DIR_INDEX_KEY 96
1e1d2701 1084/*
9078a3e1 1085 * extent data is for file data
1e1d2701 1086 */
0660b5af 1087#define BTRFS_EXTENT_DATA_KEY 108
d20f7043 1088
f254e52c 1089/*
d20f7043
CM
1090 * extent csums are stored in a separate tree and hold csums for
1091 * an entire extent on disk.
f254e52c 1092 */
d20f7043 1093#define BTRFS_EXTENT_CSUM_KEY 128
f254e52c 1094
1e1d2701 1095/*
d4a78947 1096 * root items point to tree roots. They are typically in the root
1e1d2701
CM
1097 * tree used by the super block to find all the other trees
1098 */
0660b5af
CM
1099#define BTRFS_ROOT_ITEM_KEY 132
1100
1101/*
1102 * root backrefs tie subvols and snapshots to the directory entries that
1103 * reference them
1104 */
1105#define BTRFS_ROOT_BACKREF_KEY 144
1106
1107/*
1108 * root refs make a fast index for listing all of the snapshots and
1109 * subvolumes referenced by a given root. They point directly to the
1110 * directory item in the root that references the subvol
1111 */
1112#define BTRFS_ROOT_REF_KEY 156
1113
1e1d2701
CM
1114/*
1115 * extent items are in the extent map tree. These record which blocks
1116 * are used, and how many references there are to each block
1117 */
0660b5af 1118#define BTRFS_EXTENT_ITEM_KEY 168
5d4f98a2
YZ
1119
1120#define BTRFS_TREE_BLOCK_REF_KEY 176
1121
1122#define BTRFS_EXTENT_DATA_REF_KEY 178
1123
1124#define BTRFS_EXTENT_REF_V0_KEY 180
1125
1126#define BTRFS_SHARED_BLOCK_REF_KEY 182
1127
1128#define BTRFS_SHARED_DATA_REF_KEY 184
9078a3e1
CM
1129
1130/*
1131 * block groups give us hints into the extent allocation trees. Which
1132 * blocks are free etc etc
1133 */
0660b5af 1134#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
9f5fae2f 1135
0660b5af
CM
1136#define BTRFS_DEV_EXTENT_KEY 204
1137#define BTRFS_DEV_ITEM_KEY 216
1138#define BTRFS_CHUNK_ITEM_KEY 228
0b86a832 1139
1e1d2701
CM
1140/*
1141 * string items are for debugging. They just store a short string of
1142 * data in the FS
1143 */
9078a3e1
CM
1144#define BTRFS_STRING_ITEM_KEY 253
1145
21ad10cf
CM
1146#define BTRFS_MOUNT_NODATASUM (1 << 0)
1147#define BTRFS_MOUNT_NODATACOW (1 << 1)
1148#define BTRFS_MOUNT_NOBARRIER (1 << 2)
e18e4809 1149#define BTRFS_MOUNT_SSD (1 << 3)
dfe25020 1150#define BTRFS_MOUNT_DEGRADED (1 << 4)
c8b97818 1151#define BTRFS_MOUNT_COMPRESS (1 << 5)
3a5e1404 1152#define BTRFS_MOUNT_NOTREELOG (1 << 6)
dccae999 1153#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
451d7585 1154#define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
c289811c 1155#define BTRFS_MOUNT_NOSSD (1 << 9)
e244a0ae 1156#define BTRFS_MOUNT_DISCARD (1 << 10)
b6cda9bc
CM
1157
1158#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1159#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1160#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1161 BTRFS_MOUNT_##opt)
b98b6767
Y
1162/*
1163 * Inode flags
1164 */
fdebe2bd
Y
1165#define BTRFS_INODE_NODATASUM (1 << 0)
1166#define BTRFS_INODE_NODATACOW (1 << 1)
1167#define BTRFS_INODE_READONLY (1 << 2)
c8b97818 1168#define BTRFS_INODE_NOCOMPRESS (1 << 3)
d899e052 1169#define BTRFS_INODE_PREALLOC (1 << 4)
6cbff00f
CH
1170#define BTRFS_INODE_SYNC (1 << 5)
1171#define BTRFS_INODE_IMMUTABLE (1 << 6)
1172#define BTRFS_INODE_APPEND (1 << 7)
1173#define BTRFS_INODE_NODUMP (1 << 8)
1174#define BTRFS_INODE_NOATIME (1 << 9)
1175#define BTRFS_INODE_DIRSYNC (1 << 10)
1176
1177
5f39d397
CM
1178/* some macros to generate set/get funcs for the struct fields. This
1179 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1180 * one for u8:
1181 */
1182#define le8_to_cpu(v) (v)
1183#define cpu_to_le8(v) (v)
1184#define __le8 u8
1185
1186#define read_eb_member(eb, ptr, type, member, result) ( \
1187 read_extent_buffer(eb, (char *)(result), \
1188 ((unsigned long)(ptr)) + \
1189 offsetof(type, member), \
1190 sizeof(((type *)0)->member)))
1191
1192#define write_eb_member(eb, ptr, type, member, result) ( \
1193 write_extent_buffer(eb, (char *)(result), \
1194 ((unsigned long)(ptr)) + \
1195 offsetof(type, member), \
1196 sizeof(((type *)0)->member)))
1197
0f82731f 1198#ifndef BTRFS_SETGET_FUNCS
5f39d397 1199#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
0f82731f
CM
1200u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1201void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1202#endif
5f39d397
CM
1203
1204#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1205static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1206{ \
df68b8a7
DM
1207 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1208 u##bits res = le##bits##_to_cpu(p->member); \
1209 kunmap_atomic(p, KM_USER0); \
810191ff 1210 return res; \
5f39d397
CM
1211} \
1212static inline void btrfs_set_##name(struct extent_buffer *eb, \
1213 u##bits val) \
1214{ \
df68b8a7
DM
1215 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1216 p->member = cpu_to_le##bits(val); \
1217 kunmap_atomic(p, KM_USER0); \
5f39d397 1218}
9078a3e1 1219
5f39d397
CM
1220#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1221static inline u##bits btrfs_##name(type *s) \
1222{ \
1223 return le##bits##_to_cpu(s->member); \
1224} \
1225static inline void btrfs_set_##name(type *s, u##bits val) \
1226{ \
1227 s->member = cpu_to_le##bits(val); \
1e1d2701
CM
1228}
1229
0b86a832
CM
1230BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1231BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1232BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1233BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1234BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
c3027eb5
CM
1235BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1236 start_offset, 64);
0b86a832
CM
1237BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1238BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
e17cade2
CM
1239BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1240BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1241BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2b82032c 1242BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
0b86a832 1243
8a4b83cc
CM
1244BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1245BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1246 total_bytes, 64);
1247BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1248 bytes_used, 64);
1249BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1250 io_align, 32);
1251BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1252 io_width, 32);
1253BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1254 sector_size, 32);
1255BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
e17cade2
CM
1256BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1257 dev_group, 32);
1258BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1259 seek_speed, 8);
1260BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1261 bandwidth, 8);
2b82032c
YZ
1262BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1263 generation, 64);
8a4b83cc 1264
0b86a832
CM
1265static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1266{
1267 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1268}
1269
2b82032c
YZ
1270static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1271{
1272 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1273}
1274
e17cade2 1275BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
0b86a832
CM
1276BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1277BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1278BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1279BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1280BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1281BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1282BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
321aecc6 1283BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
0b86a832
CM
1284BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1285BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1286
e17cade2
CM
1287static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1288{
1289 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1290}
1291
1292BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
0b86a832
CM
1293BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1294BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1295 stripe_len, 64);
1296BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1297 io_align, 32);
1298BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1299 io_width, 32);
1300BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1301 sector_size, 32);
1302BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1303BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1304 num_stripes, 16);
321aecc6
CM
1305BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1306 sub_stripes, 16);
0b86a832
CM
1307BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1308BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1309
1310static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1311 int nr)
1312{
1313 unsigned long offset = (unsigned long)c;
1314 offset += offsetof(struct btrfs_chunk, stripe);
1315 offset += nr * sizeof(struct btrfs_stripe);
1316 return (struct btrfs_stripe *)offset;
1317}
1318
a443755f
CM
1319static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1320{
1321 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1322}
1323
0b86a832
CM
1324static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1325 struct btrfs_chunk *c, int nr)
1326{
1327 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1328}
1329
1330static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1331 struct btrfs_chunk *c, int nr,
1332 u64 val)
1333{
1334 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1335}
1336
1337static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1338 struct btrfs_chunk *c, int nr)
1339{
1340 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1341}
1342
1343static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1344 struct btrfs_chunk *c, int nr,
1345 u64 val)
1346{
1347 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1348}
1349
5f39d397
CM
1350/* struct btrfs_block_group_item */
1351BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1352 used, 64);
1353BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1354 used, 64);
0b86a832
CM
1355BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1356 struct btrfs_block_group_item, chunk_objectid, 64);
e17cade2
CM
1357
1358BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
0b86a832
CM
1359 struct btrfs_block_group_item, chunk_objectid, 64);
1360BTRFS_SETGET_FUNCS(disk_block_group_flags,
1361 struct btrfs_block_group_item, flags, 64);
1362BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1363 struct btrfs_block_group_item, flags, 64);
1e1d2701 1364
3954401f
CM
1365/* struct btrfs_inode_ref */
1366BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
aec7477b 1367BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
3954401f 1368
5f39d397
CM
1369/* struct btrfs_inode_item */
1370BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
c3027eb5 1371BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
e02119d5 1372BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
5f39d397 1373BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
a76a3cd4 1374BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
5f39d397
CM
1375BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1376BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1377BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1378BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1379BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
0b86a832 1380BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
f2b636e8 1381BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1e1d2701 1382
0b86a832 1383static inline struct btrfs_timespec *
5f39d397 1384btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1e1d2701 1385{
5f39d397
CM
1386 unsigned long ptr = (unsigned long)inode_item;
1387 ptr += offsetof(struct btrfs_inode_item, atime);
0b86a832 1388 return (struct btrfs_timespec *)ptr;
1e1d2701
CM
1389}
1390
0b86a832 1391static inline struct btrfs_timespec *
5f39d397 1392btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1e1d2701 1393{
5f39d397
CM
1394 unsigned long ptr = (unsigned long)inode_item;
1395 ptr += offsetof(struct btrfs_inode_item, mtime);
0b86a832 1396 return (struct btrfs_timespec *)ptr;
1e1d2701
CM
1397}
1398
0b86a832 1399static inline struct btrfs_timespec *
5f39d397 1400btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1e1d2701 1401{
5f39d397
CM
1402 unsigned long ptr = (unsigned long)inode_item;
1403 ptr += offsetof(struct btrfs_inode_item, ctime);
0b86a832 1404 return (struct btrfs_timespec *)ptr;
1e1d2701
CM
1405}
1406
0b86a832 1407static inline struct btrfs_timespec *
5f39d397 1408btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1e1d2701 1409{
5f39d397
CM
1410 unsigned long ptr = (unsigned long)inode_item;
1411 ptr += offsetof(struct btrfs_inode_item, otime);
0b86a832 1412 return (struct btrfs_timespec *)ptr;
1e1d2701
CM
1413}
1414
0b86a832
CM
1415BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1416BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
e20d96d6 1417
0b86a832 1418/* struct btrfs_dev_extent */
e17cade2
CM
1419BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1420 chunk_tree, 64);
1421BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1422 chunk_objectid, 64);
1423BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1424 chunk_offset, 64);
0b86a832
CM
1425BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1426
e17cade2
CM
1427static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1428{
1429 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1430 return (u8 *)((unsigned long)dev + ptr);
1431}
1432
5d4f98a2
YZ
1433BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1434BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1435 generation, 64);
1436BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
74493f7a 1437
5d4f98a2
YZ
1438BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1439
1440
1441BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1442
1443static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1444 struct btrfs_tree_block_info *item,
1445 struct btrfs_disk_key *key)
1446{
1447 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1448}
1449
1450static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1451 struct btrfs_tree_block_info *item,
1452 struct btrfs_disk_key *key)
1453{
1454 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1455}
e20d96d6 1456
5d4f98a2
YZ
1457BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1458 root, 64);
1459BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1460 objectid, 64);
1461BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1462 offset, 64);
1463BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1464 count, 32);
1465
1466BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1467 count, 32);
1468
1469BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1470 type, 8);
1471BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1472 offset, 64);
1473
1474static inline u32 btrfs_extent_inline_ref_size(int type)
1475{
1476 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1477 type == BTRFS_SHARED_BLOCK_REF_KEY)
1478 return sizeof(struct btrfs_extent_inline_ref);
1479 if (type == BTRFS_SHARED_DATA_REF_KEY)
1480 return sizeof(struct btrfs_shared_data_ref) +
1481 sizeof(struct btrfs_extent_inline_ref);
1482 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1483 return sizeof(struct btrfs_extent_data_ref) +
1484 offsetof(struct btrfs_extent_inline_ref, offset);
1485 BUG();
1486 return 0;
1487}
1488
1489BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1490BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1491 generation, 64);
1492BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1493BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
e20d96d6 1494
5f39d397
CM
1495/* struct btrfs_node */
1496BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
74493f7a 1497BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
e20d96d6 1498
5f39d397 1499static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
cf27e1ee 1500{
5f39d397
CM
1501 unsigned long ptr;
1502 ptr = offsetof(struct btrfs_node, ptrs) +
1503 sizeof(struct btrfs_key_ptr) * nr;
1504 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
cf27e1ee
CM
1505}
1506
5f39d397
CM
1507static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1508 int nr, u64 val)
cf27e1ee 1509{
5f39d397
CM
1510 unsigned long ptr;
1511 ptr = offsetof(struct btrfs_node, ptrs) +
1512 sizeof(struct btrfs_key_ptr) * nr;
1513 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
cf27e1ee
CM
1514}
1515
74493f7a
CM
1516static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1517{
1518 unsigned long ptr;
1519 ptr = offsetof(struct btrfs_node, ptrs) +
1520 sizeof(struct btrfs_key_ptr) * nr;
1521 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1522}
1523
1524static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1525 int nr, u64 val)
1526{
1527 unsigned long ptr;
1528 ptr = offsetof(struct btrfs_node, ptrs) +
1529 sizeof(struct btrfs_key_ptr) * nr;
1530 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1531}
1532
810191ff 1533static inline unsigned long btrfs_node_key_ptr_offset(int nr)
4d775673 1534{
5f39d397
CM
1535 return offsetof(struct btrfs_node, ptrs) +
1536 sizeof(struct btrfs_key_ptr) * nr;
4d775673
CM
1537}
1538
e644d021
CM
1539void btrfs_node_key(struct extent_buffer *eb,
1540 struct btrfs_disk_key *disk_key, int nr);
1541
5f39d397
CM
1542static inline void btrfs_set_node_key(struct extent_buffer *eb,
1543 struct btrfs_disk_key *disk_key, int nr)
1d4f8a0c 1544{
5f39d397
CM
1545 unsigned long ptr;
1546 ptr = btrfs_node_key_ptr_offset(nr);
1547 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1548 struct btrfs_key_ptr, key, disk_key);
1d4f8a0c
CM
1549}
1550
5f39d397
CM
1551/* struct btrfs_item */
1552BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1553BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
4d775673 1554
5f39d397 1555static inline unsigned long btrfs_item_nr_offset(int nr)
1d4f8a0c 1556{
5f39d397
CM
1557 return offsetof(struct btrfs_leaf, items) +
1558 sizeof(struct btrfs_item) * nr;
1d4f8a0c
CM
1559}
1560
5f39d397
CM
1561static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1562 int nr)
0783fcfc 1563{
5f39d397 1564 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
0783fcfc
CM
1565}
1566
5f39d397
CM
1567static inline u32 btrfs_item_end(struct extent_buffer *eb,
1568 struct btrfs_item *item)
0783fcfc 1569{
5f39d397 1570 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
0783fcfc
CM
1571}
1572
5f39d397 1573static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
0783fcfc 1574{
5f39d397 1575 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
0783fcfc
CM
1576}
1577
5f39d397 1578static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
0783fcfc 1579{
5f39d397 1580 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
0783fcfc
CM
1581}
1582
5f39d397 1583static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
0783fcfc 1584{
5f39d397 1585 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
0783fcfc
CM
1586}
1587
5f39d397
CM
1588static inline void btrfs_item_key(struct extent_buffer *eb,
1589 struct btrfs_disk_key *disk_key, int nr)
1d4f6404 1590{
5f39d397
CM
1591 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1592 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1d4f6404
CM
1593}
1594
5f39d397
CM
1595static inline void btrfs_set_item_key(struct extent_buffer *eb,
1596 struct btrfs_disk_key *disk_key, int nr)
1d4f6404 1597{
5f39d397
CM
1598 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1599 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1d4f6404
CM
1600}
1601
e02119d5
CM
1602BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1603
0660b5af
CM
1604/*
1605 * struct btrfs_root_ref
1606 */
1607BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1608BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1609BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1610
5f39d397 1611/* struct btrfs_dir_item */
5103e947 1612BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
5f39d397
CM
1613BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1614BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
e02119d5 1615BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1d4f6404 1616
5f39d397
CM
1617static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1618 struct btrfs_dir_item *item,
1619 struct btrfs_disk_key *key)
1d4f6404 1620{
5f39d397 1621 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1d4f6404
CM
1622}
1623
5f39d397
CM
1624static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1625 struct btrfs_dir_item *item,
1626 struct btrfs_disk_key *key)
a8a2ee0c 1627{
5f39d397 1628 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
a8a2ee0c
CM
1629}
1630
5f39d397
CM
1631/* struct btrfs_disk_key */
1632BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1633 objectid, 64);
1634BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1635BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1d4f6404 1636
e2fa7227
CM
1637static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1638 struct btrfs_disk_key *disk)
1639{
1640 cpu->offset = le64_to_cpu(disk->offset);
5f39d397 1641 cpu->type = disk->type;
e2fa7227
CM
1642 cpu->objectid = le64_to_cpu(disk->objectid);
1643}
1644
1645static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1646 struct btrfs_key *cpu)
1647{
1648 disk->offset = cpu_to_le64(cpu->offset);
5f39d397 1649 disk->type = cpu->type;
e2fa7227
CM
1650 disk->objectid = cpu_to_le64(cpu->objectid);
1651}
1652
5f39d397
CM
1653static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1654 struct btrfs_key *key, int nr)
7f5c1516 1655{
5f39d397
CM
1656 struct btrfs_disk_key disk_key;
1657 btrfs_node_key(eb, &disk_key, nr);
1658 btrfs_disk_key_to_cpu(key, &disk_key);
7f5c1516
CM
1659}
1660
5f39d397
CM
1661static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1662 struct btrfs_key *key, int nr)
7f5c1516 1663{
5f39d397
CM
1664 struct btrfs_disk_key disk_key;
1665 btrfs_item_key(eb, &disk_key, nr);
1666 btrfs_disk_key_to_cpu(key, &disk_key);
7f5c1516
CM
1667}
1668
5f39d397
CM
1669static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1670 struct btrfs_dir_item *item,
1671 struct btrfs_key *key)
4d775673 1672{
5f39d397
CM
1673 struct btrfs_disk_key disk_key;
1674 btrfs_dir_item_key(eb, item, &disk_key);
1675 btrfs_disk_key_to_cpu(key, &disk_key);
4d775673
CM
1676}
1677
58176a96 1678
5f39d397 1679static inline u8 btrfs_key_type(struct btrfs_key *key)
3768f368 1680{
5f39d397 1681 return key->type;
3768f368
CM
1682}
1683
5f39d397 1684static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
3768f368 1685{
5f39d397 1686 key->type = val;
3768f368
CM
1687}
1688
5f39d397 1689/* struct btrfs_header */
db94535d 1690BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
5f39d397
CM
1691BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1692 generation, 64);
1693BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1694BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
63b10fc4 1695BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
5f39d397 1696BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
0f7d52f4 1697
63b10fc4
CM
1698static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1699{
1700 return (btrfs_header_flags(eb) & flag) == flag;
1701}
1702
1703static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1704{
1705 u64 flags = btrfs_header_flags(eb);
1706 btrfs_set_header_flags(eb, flags | flag);
1707 return (flags & flag) == flag;
1708}
1709
1710static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1711{
1712 u64 flags = btrfs_header_flags(eb);
1713 btrfs_set_header_flags(eb, flags & ~flag);
1714 return (flags & flag) == flag;
1715}
1716
5d4f98a2
YZ
1717static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1718{
1719 u64 flags = btrfs_header_flags(eb);
1720 return flags >> BTRFS_BACKREF_REV_SHIFT;
1721}
1722
1723static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1724 int rev)
1725{
1726 u64 flags = btrfs_header_flags(eb);
1727 flags &= ~BTRFS_BACKREF_REV_MASK;
1728 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1729 btrfs_set_header_flags(eb, flags);
1730}
1731
5f39d397 1732static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
0f7d52f4 1733{
5f39d397
CM
1734 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1735 return (u8 *)ptr;
0f7d52f4
CM
1736}
1737
e17cade2
CM
1738static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1739{
1740 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1741 return (u8 *)ptr;
1742}
1743
5f39d397 1744static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
3768f368 1745{
5f39d397
CM
1746 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1747 return (u8 *)ptr;
3768f368
CM
1748}
1749
5f39d397 1750static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
3768f368 1751{
5f39d397
CM
1752 unsigned long ptr = offsetof(struct btrfs_header, csum);
1753 return (u8 *)ptr;
3768f368
CM
1754}
1755
5f39d397 1756static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
3768f368 1757{
5f39d397 1758 return NULL;
3768f368
CM
1759}
1760
5f39d397 1761static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
3768f368 1762{
5f39d397 1763 return NULL;
3768f368
CM
1764}
1765
5f39d397 1766static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
3768f368 1767{
5f39d397 1768 return NULL;
3768f368
CM
1769}
1770
5f39d397 1771static inline int btrfs_is_leaf(struct extent_buffer *eb)
3768f368 1772{
d397712b 1773 return btrfs_header_level(eb) == 0;
3768f368
CM
1774}
1775
5f39d397 1776/* struct btrfs_root_item */
84234f3a
YZ
1777BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1778 generation, 64);
5f39d397 1779BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
db94535d
CM
1780BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1781BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
3768f368 1782
84234f3a
YZ
1783BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1784 generation, 64);
db94535d
CM
1785BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1786BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
5f39d397
CM
1787BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1788BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
f2b636e8 1789BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
db94535d
CM
1790BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1791BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
80ff3856
YZ
1792BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1793 last_snapshot, 64);
123abc88 1794
5f39d397 1795/* struct btrfs_super_block */
607d432d 1796
db94535d 1797BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
a061fc8d 1798BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
5f39d397
CM
1799BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1800 generation, 64);
1801BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
0b86a832
CM
1802BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1803 struct btrfs_super_block, sys_chunk_array_size, 32);
84234f3a
YZ
1804BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1805 struct btrfs_super_block, chunk_root_generation, 64);
db94535d
CM
1806BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1807 root_level, 8);
0b86a832
CM
1808BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1809 chunk_root, 64);
1810BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
e02119d5
CM
1811 chunk_root_level, 8);
1812BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1813 log_root, 64);
c3027eb5
CM
1814BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1815 log_root_transid, 64);
e02119d5
CM
1816BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1817 log_root_level, 8);
db94535d
CM
1818BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1819 total_bytes, 64);
1820BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1821 bytes_used, 64);
5f39d397
CM
1822BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1823 sectorsize, 32);
1824BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1825 nodesize, 32);
1826BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1827 leafsize, 32);
87ee04eb
CM
1828BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1829 stripesize, 32);
5f39d397
CM
1830BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1831 root_dir_objectid, 64);
8a4b83cc
CM
1832BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1833 num_devices, 64);
f2b636e8
JB
1834BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1835 compat_flags, 64);
1836BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1837 compat_flags, 64);
1838BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1839 incompat_flags, 64);
607d432d
JB
1840BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1841 csum_type, 16);
1842
1843static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1844{
1845 int t = btrfs_super_csum_type(s);
1846 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1847 return btrfs_csum_sizes[t];
1848}
2e635a27 1849
5f39d397 1850static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2e635a27 1851{
5f39d397 1852 return offsetof(struct btrfs_leaf, items);
2e635a27
CM
1853}
1854
5f39d397
CM
1855/* struct btrfs_file_extent_item */
1856BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
9f5fae2f 1857
d397712b
CM
1858static inline unsigned long
1859btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
236454df 1860{
5f39d397 1861 unsigned long offset = (unsigned long)e;
db94535d 1862 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
5f39d397 1863 return offset;
236454df
CM
1864}
1865
1866static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1867{
db94535d 1868 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
9f5fae2f
CM
1869}
1870
db94535d
CM
1871BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1872 disk_bytenr, 64);
5f39d397
CM
1873BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1874 generation, 64);
db94535d
CM
1875BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1876 disk_num_bytes, 64);
5f39d397
CM
1877BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1878 offset, 64);
db94535d
CM
1879BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1880 num_bytes, 64);
c8b97818
CM
1881BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1882 ram_bytes, 64);
1883BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1884 compression, 8);
1885BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1886 encryption, 8);
1887BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1888 other_encoding, 16);
1889
1890/* this returns the number of file bytes represented by the inline item.
1891 * If an item is compressed, this is the uncompressed size
1892 */
1893static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1894 struct btrfs_file_extent_item *e)
1895{
1896 return btrfs_file_extent_ram_bytes(eb, e);
1897}
1898
1899/*
1900 * this returns the number of bytes used by the item on disk, minus the
1901 * size of any extent headers. If a file is compressed on disk, this is
1902 * the compressed size
1903 */
1904static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1905 struct btrfs_item *e)
1906{
1907 unsigned long offset;
1908 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1909 return btrfs_item_size(eb, e) - offset;
1910}
9f5fae2f 1911
e20d96d6
CM
1912static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1913{
1914 return sb->s_fs_info;
1915}
1916
58176a96
JB
1917static inline int btrfs_set_root_name(struct btrfs_root *root,
1918 const char *name, int len)
1919{
1920 /* if we already have a name just free it */
d397712b 1921 kfree(root->name);
58176a96
JB
1922
1923 root->name = kmalloc(len+1, GFP_KERNEL);
1924 if (!root->name)
1925 return -ENOMEM;
1926
1927 memcpy(root->name, name, len);
d397712b 1928 root->name[len] = '\0';
58176a96
JB
1929
1930 return 0;
1931}
1932
d397712b
CM
1933static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
1934{
db94535d
CM
1935 if (level == 0)
1936 return root->leafsize;
1937 return root->nodesize;
1938}
1939
4beb1b8b
CM
1940/* helper function to cast into the data area of the leaf. */
1941#define btrfs_item_ptr(leaf, slot, type) \
123abc88 1942 ((type *)(btrfs_leaf_data(leaf) + \
5f39d397
CM
1943 btrfs_item_offset_nr(leaf, slot)))
1944
1945#define btrfs_item_ptr_offset(leaf, slot) \
1946 ((unsigned long)(btrfs_leaf_data(leaf) + \
1947 btrfs_item_offset_nr(leaf, slot)))
4beb1b8b 1948
2b1f55b0
CM
1949static inline struct dentry *fdentry(struct file *file)
1950{
6da6abae 1951 return file->f_path.dentry;
6da6abae
CM
1952}
1953
b18c6685 1954/* extent-tree.c */
fa9c0d79 1955void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
56bec294
CM
1956int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
1957 struct btrfs_root *root, unsigned long count);
31840ae1 1958int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
11833d66
YZ
1959int btrfs_pin_extent(struct btrfs_root *root,
1960 u64 bytenr, u64 num, int reserved);
e02119d5
CM
1961int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1962 struct btrfs_root *root, struct extent_buffer *leaf);
80ff3856 1963int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
5d4f98a2
YZ
1964 struct btrfs_root *root,
1965 u64 objectid, u64 offset, u64 bytenr);
d1310b2e 1966int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
d397712b
CM
1967struct btrfs_block_group_cache *btrfs_lookup_block_group(
1968 struct btrfs_fs_info *info,
1969 u64 bytenr);
5d4f98a2 1970void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
d2fb3437
YZ
1971u64 btrfs_find_block_group(struct btrfs_root *root,
1972 u64 search_start, u64 search_hint, int owner);
5f39d397 1973struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
5d4f98a2
YZ
1974 struct btrfs_root *root, u32 blocksize,
1975 u64 parent, u64 root_objectid,
1976 struct btrfs_disk_key *key, int level,
1977 u64 hint, u64 empty_size);
65b51a00
CM
1978struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1979 struct btrfs_root *root,
4008c04a
CM
1980 u64 bytenr, u32 blocksize,
1981 int level);
5d4f98a2
YZ
1982int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
1983 struct btrfs_root *root,
1984 u64 root_objectid, u64 owner,
1985 u64 offset, struct btrfs_key *ins);
1986int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
1987 struct btrfs_root *root,
1988 u64 root_objectid, u64 owner, u64 offset,
1989 struct btrfs_key *ins);
e6dcd2dc
CM
1990int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1991 struct btrfs_root *root,
1992 u64 num_bytes, u64 min_alloc_size,
1993 u64 empty_size, u64 hint_byte,
1994 u64 search_end, struct btrfs_key *ins,
1995 u64 data);
e089f05c 1996int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
5d4f98a2
YZ
1997 struct extent_buffer *buf, int full_backref);
1998int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1999 struct extent_buffer *buf, int full_backref);
2000int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2001 struct btrfs_root *root,
2002 u64 bytenr, u64 num_bytes, u64 flags,
2003 int is_data);
31840ae1
ZY
2004int btrfs_free_extent(struct btrfs_trans_handle *trans,
2005 struct btrfs_root *root,
2006 u64 bytenr, u64 num_bytes, u64 parent,
5d4f98a2
YZ
2007 u64 root_objectid, u64 owner, u64 offset);
2008
65b51a00 2009int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
11833d66
YZ
2010int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2011 struct btrfs_root *root);
ccd467d6 2012int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
11833d66 2013 struct btrfs_root *root);
b18c6685 2014int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
31840ae1
ZY
2015 struct btrfs_root *root,
2016 u64 bytenr, u64 num_bytes, u64 parent,
5d4f98a2
YZ
2017 u64 root_objectid, u64 owner, u64 offset);
2018
9078a3e1
CM
2019int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2020 struct btrfs_root *root);
d2fb3437 2021int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
9078a3e1
CM
2022int btrfs_free_block_groups(struct btrfs_fs_info *info);
2023int btrfs_read_block_groups(struct btrfs_root *root);
ba1bf481 2024int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
0b86a832
CM
2025int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2026 struct btrfs_root *root, u64 bytes_used,
e17cade2 2027 u64 type, u64 chunk_objectid, u64 chunk_offset,
0b86a832 2028 u64 size);
1a40e23b
ZY
2029int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2030 struct btrfs_root *root, u64 group_start);
5d4f98a2
YZ
2031int btrfs_prepare_block_group_relocation(struct btrfs_root *root,
2032 struct btrfs_block_group_cache *group);
2033
2b82032c 2034u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
6a63209f 2035void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
4184ea7f
CM
2036void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2037
9ed74f2d
JB
2038int btrfs_reserve_metadata_space(struct btrfs_root *root, int num_items);
2039int btrfs_unreserve_metadata_space(struct btrfs_root *root, int num_items);
2040int btrfs_unreserve_metadata_for_delalloc(struct btrfs_root *root,
2041 struct inode *inode, int num_items);
2042int btrfs_reserve_metadata_for_delalloc(struct btrfs_root *root,
2043 struct inode *inode, int num_items);
6a63209f
JB
2044int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode,
2045 u64 bytes);
2046void btrfs_free_reserved_data_space(struct btrfs_root *root,
2047 struct inode *inode, u64 bytes);
2048void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode,
2049 u64 bytes);
2050void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode,
2051 u64 bytes);
dee26a9f 2052/* ctree.c */
5d4f98a2
YZ
2053int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2054 int level, int *slot);
2055int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
0b86a832
CM
2056int btrfs_previous_item(struct btrfs_root *root,
2057 struct btrfs_path *path, u64 min_objectid,
2058 int type);
31840ae1
ZY
2059int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2060 struct btrfs_root *root, struct btrfs_path *path,
2061 struct btrfs_key *new_key);
925baedd
CM
2062struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2063struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
e7a84565 2064int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3f157a2f
CM
2065 struct btrfs_key *key, int lowest_level,
2066 int cache_only, u64 min_trans);
2067int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
e02119d5 2068 struct btrfs_key *max_key,
3f157a2f
CM
2069 struct btrfs_path *path, int cache_only,
2070 u64 min_trans);
5f39d397
CM
2071int btrfs_cow_block(struct btrfs_trans_handle *trans,
2072 struct btrfs_root *root, struct extent_buffer *buf,
2073 struct extent_buffer *parent, int parent_slot,
9fa8cfe7 2074 struct extent_buffer **cow_ret);
be20aa9d
CM
2075int btrfs_copy_root(struct btrfs_trans_handle *trans,
2076 struct btrfs_root *root,
2077 struct extent_buffer *buf,
2078 struct extent_buffer **cow_ret, u64 new_root_objectid);
5d4f98a2
YZ
2079int btrfs_block_can_be_shared(struct btrfs_root *root,
2080 struct extent_buffer *buf);
6567e837
CM
2081int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2082 *root, struct btrfs_path *path, u32 data_size);
b18c6685
CM
2083int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2084 struct btrfs_root *root,
2085 struct btrfs_path *path,
179e29e4 2086 u32 new_size, int from_end);
459931ec
CM
2087int btrfs_split_item(struct btrfs_trans_handle *trans,
2088 struct btrfs_root *root,
2089 struct btrfs_path *path,
2090 struct btrfs_key *new_key,
2091 unsigned long split_offset);
ad48fd75
YZ
2092int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2093 struct btrfs_root *root,
2094 struct btrfs_path *path,
2095 struct btrfs_key *new_key);
e089f05c
CM
2096int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2097 *root, struct btrfs_key *key, struct btrfs_path *p, int
2098 ins_len, int cow);
6702ed49 2099int btrfs_realloc_node(struct btrfs_trans_handle *trans,
5f39d397 2100 struct btrfs_root *root, struct extent_buffer *parent,
a6b6e75e
CM
2101 int start_slot, int cache_only, u64 *last_ret,
2102 struct btrfs_key *progress);
234b63a0 2103void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
2c90e5d6
CM
2104struct btrfs_path *btrfs_alloc_path(void);
2105void btrfs_free_path(struct btrfs_path *p);
b4ce94de 2106void btrfs_set_path_blocking(struct btrfs_path *p);
b4ce94de
CM
2107void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2108
85e21bac
CM
2109int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2110 struct btrfs_path *path, int slot, int nr);
85e21bac
CM
2111static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2112 struct btrfs_root *root,
2113 struct btrfs_path *path)
2114{
2115 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2116}
2117
e089f05c
CM
2118int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2119 *root, struct btrfs_key *key, void *data, u32 data_size);
f3465ca4
JB
2120int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
2121 struct btrfs_root *root,
2122 struct btrfs_path *path,
2123 struct btrfs_key *cpu_key, u32 *data_size,
2124 int nr);
9c58309d
CM
2125int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2126 struct btrfs_root *root,
2127 struct btrfs_path *path,
2128 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2129
2130static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2131 struct btrfs_root *root,
2132 struct btrfs_path *path,
2133 struct btrfs_key *key,
2134 u32 data_size)
2135{
2136 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2137}
2138
234b63a0 2139int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
7bb86316 2140int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
5f39d397 2141int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2c47e605 2142int btrfs_drop_snapshot(struct btrfs_root *root, int update_ref);
f82d02d9
YZ
2143int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2144 struct btrfs_root *root,
2145 struct extent_buffer *node,
2146 struct extent_buffer *parent);
dee26a9f 2147/* root-item.c */
ea9e8b11 2148int btrfs_find_root_ref(struct btrfs_root *tree_root,
4df27c4d
YZ
2149 struct btrfs_path *path,
2150 u64 root_id, u64 ref_id);
0660b5af
CM
2151int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2152 struct btrfs_root *tree_root,
4df27c4d
YZ
2153 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2154 const char *name, int name_len);
2155int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2156 struct btrfs_root *tree_root,
2157 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
0660b5af 2158 const char *name, int name_len);
e089f05c
CM
2159int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2160 struct btrfs_key *key);
2161int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2162 *root, struct btrfs_key *key, struct btrfs_root_item
2163 *item);
2164int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2165 *root, struct btrfs_key *key, struct btrfs_root_item
2166 *item);
2167int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2168 btrfs_root_item *item, struct btrfs_key *key);
bf4ef679
CM
2169int btrfs_search_root(struct btrfs_root *root, u64 search_start,
2170 u64 *found_objectid);
5d4f98a2 2171int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
76dda93c 2172int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
5d4f98a2
YZ
2173int btrfs_set_root_node(struct btrfs_root_item *item,
2174 struct extent_buffer *node);
dee26a9f 2175/* dir-item.c */
d397712b
CM
2176int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2177 struct btrfs_root *root, const char *name,
2178 int name_len, u64 dir,
aec7477b 2179 struct btrfs_key *location, u8 type, u64 index);
7e38180e
CM
2180struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2181 struct btrfs_root *root,
2182 struct btrfs_path *path, u64 dir,
2183 const char *name, int name_len,
2184 int mod);
2185struct btrfs_dir_item *
2186btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2187 struct btrfs_root *root,
2188 struct btrfs_path *path, u64 dir,
2189 u64 objectid, const char *name, int name_len,
2190 int mod);
4df27c4d
YZ
2191struct btrfs_dir_item *
2192btrfs_search_dir_index_item(struct btrfs_root *root,
2193 struct btrfs_path *path, u64 dirid,
2194 const char *name, int name_len);
7e38180e
CM
2195struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2196 struct btrfs_path *path,
7f5c1516 2197 const char *name, int name_len);
7e38180e
CM
2198int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2199 struct btrfs_root *root,
2200 struct btrfs_path *path,
2201 struct btrfs_dir_item *di);
5103e947
JB
2202int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2203 struct btrfs_root *root, const char *name,
2204 u16 name_len, const void *data, u16 data_len,
2205 u64 dir);
2206struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2207 struct btrfs_root *root,
2208 struct btrfs_path *path, u64 dir,
2209 const char *name, u16 name_len,
2210 int mod);
7b128766
JB
2211
2212/* orphan.c */
2213int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2214 struct btrfs_root *root, u64 offset);
2215int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2216 struct btrfs_root *root, u64 offset);
4df27c4d 2217int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
7b128766 2218
dee26a9f 2219/* inode-map.c */
9f5fae2f
CM
2220int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2221 struct btrfs_root *fs_root,
2222 u64 dirid, u64 *objectid);
5be6f7f1
CM
2223int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2224
dee26a9f 2225/* inode-item.c */
3954401f
CM
2226int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2227 struct btrfs_root *root,
2228 const char *name, int name_len,
aec7477b 2229 u64 inode_objectid, u64 ref_objectid, u64 index);
3954401f
CM
2230int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2231 struct btrfs_root *root,
2232 const char *name, int name_len,
aec7477b 2233 u64 inode_objectid, u64 ref_objectid, u64 *index);
5f39d397
CM
2234int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2235 struct btrfs_root *root,
2236 struct btrfs_path *path, u64 objectid);
293ffd5f 2237int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
d6e4a428
CM
2238 *root, struct btrfs_path *path,
2239 struct btrfs_key *location, int mod);
dee26a9f
CM
2240
2241/* file-item.c */
459931ec
CM
2242int btrfs_del_csums(struct btrfs_trans_handle *trans,
2243 struct btrfs_root *root, u64 bytenr, u64 len);
61b49440 2244int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
d20f7043 2245 struct bio *bio, u32 *dst);
b18c6685 2246int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
c8b97818
CM
2247 struct btrfs_root *root,
2248 u64 objectid, u64 pos,
2249 u64 disk_offset, u64 disk_num_bytes,
2250 u64 num_bytes, u64 offset, u64 ram_bytes,
2251 u8 compression, u8 encryption, u16 other_encoding);
dee26a9f
CM
2252int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2253 struct btrfs_root *root,
2254 struct btrfs_path *path, u64 objectid,
db94535d 2255 u64 bytenr, int mod);
065631f6 2256int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
d20f7043 2257 struct btrfs_root *root,
e6dcd2dc 2258 struct btrfs_ordered_sum *sums);
3edf7d33 2259int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
d20f7043 2260 struct bio *bio, u64 file_start, int contig);
c8b97818
CM
2261int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
2262 u64 start, unsigned long len);
b18c6685
CM
2263struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2264 struct btrfs_root *root,
2265 struct btrfs_path *path,
d20f7043 2266 u64 bytenr, int cow);
1de037a4
CM
2267int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2268 struct btrfs_root *root, struct btrfs_path *path,
2269 u64 isize);
17d217fe
YZ
2270int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
2271 u64 end, struct list_head *list);
39279cc3 2272/* inode.c */
4881ee5a
CM
2273
2274/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
5036f538 2275#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
4881ee5a
CM
2276#define ClearPageChecked ClearPageFsMisc
2277#define SetPageChecked SetPageFsMisc
2278#define PageChecked PageFsMisc
2279#endif
2280
3de4586c
CM
2281struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2282int btrfs_set_inode_index(struct inode *dir, u64 *index);
e02119d5
CM
2283int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2284 struct btrfs_root *root,
2285 struct inode *dir, struct inode *inode,
2286 const char *name, int name_len);
2287int btrfs_add_link(struct btrfs_trans_handle *trans,
2288 struct inode *parent_inode, struct inode *inode,
2289 const char *name, int name_len, int add_backref, u64 index);
4df27c4d
YZ
2290int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
2291 struct btrfs_root *root,
2292 struct inode *dir, u64 objectid,
2293 const char *name, int name_len);
e02119d5
CM
2294int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2295 struct btrfs_root *root,
2296 struct inode *inode, u64 new_size,
2297 u32 min_type);
2298
ea8c2819
CM
2299int btrfs_start_delalloc_inodes(struct btrfs_root *root);
2300int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
f421950f
CM
2301int btrfs_writepages(struct address_space *mapping,
2302 struct writeback_control *wbc);
d2fb3437 2303int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
76dda93c 2304 struct btrfs_root *new_root,
d2fb3437 2305 u64 new_dirid, u64 alloc_hint);
239b14b3 2306int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
c8b97818 2307 size_t size, struct bio *bio, unsigned long bio_flags);
239b14b3 2308
edbd8d4e
CM
2309unsigned long btrfs_force_ra(struct address_space *mapping,
2310 struct file_ra_state *ra, struct file *file,
2311 pgoff_t offset, pgoff_t last_index);
c2ec175c 2312int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
9ebefb18 2313int btrfs_readpage(struct file *file, struct page *page);
39279cc3 2314void btrfs_delete_inode(struct inode *inode);
2da98f00 2315void btrfs_put_inode(struct inode *inode);
39279cc3
CM
2316int btrfs_write_inode(struct inode *inode, int wait);
2317void btrfs_dirty_inode(struct inode *inode);
2318struct inode *btrfs_alloc_inode(struct super_block *sb);
2319void btrfs_destroy_inode(struct inode *inode);
76dda93c 2320void btrfs_drop_inode(struct inode *inode);
39279cc3
CM
2321int btrfs_init_cachep(void);
2322void btrfs_destroy_cachep(void);
6bf13c0c 2323long btrfs_ioctl_trans_end(struct file *file);
1a54ef8c 2324struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
5d4f98a2 2325 struct btrfs_root *root);
39279cc3
CM
2326int btrfs_commit_write(struct file *file, struct page *page,
2327 unsigned from, unsigned to);
a52d9a80
CM
2328struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2329 size_t page_offset, u64 start, u64 end,
2330 int create);
2331int btrfs_update_inode(struct btrfs_trans_handle *trans,
2332 struct btrfs_root *root,
2333 struct inode *inode);
5b21f2ed
ZY
2334int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
2335int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2336void btrfs_orphan_cleanup(struct btrfs_root *root);
9036c102 2337int btrfs_cont_expand(struct inode *inode, loff_t size);
76dda93c 2338int btrfs_invalidate_inodes(struct btrfs_root *root);
82d339d9 2339extern const struct dentry_operations btrfs_dentry_operations;
f46b5a66
CH
2340
2341/* ioctl.c */
2342long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
6cbff00f
CH
2343void btrfs_update_iflags(struct inode *inode);
2344void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
f46b5a66 2345
39279cc3 2346/* file.c */
e02119d5 2347int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
5b21f2ed
ZY
2348int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
2349 int skip_pinned);
5f56406a 2350int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
828c0950 2351extern const struct file_operations btrfs_file_operations;
39279cc3
CM
2352int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2353 struct btrfs_root *root, struct inode *inode,
e980b50c 2354 u64 start, u64 end, u64 locked_end,
a1ed835e 2355 u64 inline_limit, u64 *hint_block, int drop_cache);
d899e052
YZ
2356int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2357 struct btrfs_root *root,
2358 struct inode *inode, u64 start, u64 end);
6bf13c0c
SW
2359int btrfs_release_file(struct inode *inode, struct file *file);
2360
6702ed49
CM
2361/* tree-defrag.c */
2362int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2363 struct btrfs_root *root, int cache_only);
58176a96
JB
2364
2365/* sysfs.c */
2366int btrfs_init_sysfs(void);
2367void btrfs_exit_sysfs(void);
2368int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2369int btrfs_sysfs_add_root(struct btrfs_root *root);
2370void btrfs_sysfs_del_root(struct btrfs_root *root);
2371void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2372
5103e947
JB
2373/* xattr.c */
2374ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
6099afe8 2375
edbd8d4e
CM
2376/* super.c */
2377u64 btrfs_parse_size(char *str);
edf24abe 2378int btrfs_parse_options(struct btrfs_root *root, char *options);
6bf13c0c 2379int btrfs_sync_fs(struct super_block *sb, int wait);
33268eaf
JB
2380
2381/* acl.c */
0eda294d 2382#ifdef CONFIG_BTRFS_FS_POSIX_ACL
33268eaf 2383int btrfs_check_acl(struct inode *inode, int mask);
7df336ec
AV
2384#else
2385#define btrfs_check_acl NULL
2386#endif
33268eaf
JB
2387int btrfs_init_acl(struct inode *inode, struct inode *dir);
2388int btrfs_acl_chmod(struct inode *inode);
0f9dd46c 2389
5d4f98a2
YZ
2390/* relocation.c */
2391int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
2392int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
2393 struct btrfs_root *root);
2394int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
2395 struct btrfs_root *root);
2396int btrfs_recover_relocation(struct btrfs_root *root);
2397int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
eb60ceac 2398#endif