ctree.h 114.5 KB
Newer Older
C
Chris Mason 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
/*
 * Copyright (C) 2007 Oracle.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License v2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

C
Chris Mason 已提交
19 20
#ifndef __BTRFS_CTREE__
#define __BTRFS_CTREE__
21

22 23
#include <linux/mm.h>
#include <linux/highmem.h>
C
Chris Mason 已提交
24
#include <linux/fs.h>
A
Arne Jansen 已提交
25
#include <linux/rwsem.h>
26
#include <linux/completion.h>
C
Chris Mason 已提交
27
#include <linux/backing-dev.h>
28
#include <linux/wait.h>
29
#include <linux/slab.h>
S
Stefan Schmidt 已提交
30
#include <linux/kobject.h>
31
#include <trace/events/btrfs.h>
32
#include <asm/kmap_types.h>
33
#include <linux/pagemap.h>
34
#include "extent_io.h"
35
#include "extent_map.h"
36
#include "async-thread.h"
A
Arne Jansen 已提交
37
#include "ioctl.h"
C
Chris Mason 已提交
38

39
struct btrfs_trans_handle;
C
Chris Mason 已提交
40
struct btrfs_transaction;
41
struct btrfs_pending_snapshot;
C
Chris Mason 已提交
42 43 44
extern struct kmem_cache *btrfs_trans_handle_cachep;
extern struct kmem_cache *btrfs_transaction_cachep;
extern struct kmem_cache *btrfs_bit_radix_cachep;
C
Chris Mason 已提交
45
extern struct kmem_cache *btrfs_path_cachep;
46
extern struct kmem_cache *btrfs_free_space_cachep;
47
struct btrfs_ordered_sum;
48

49
#define BTRFS_MAGIC "_BHRfS_M"
50

51 52
#define BTRFS_MAX_MIRRORS 2

53
#define BTRFS_MAX_LEVEL 8
54

55 56
#define BTRFS_COMPAT_EXTENT_TREE_V0

57 58 59 60 61 62 63
/*
 * files bigger than this get some pre-flushing when they are added
 * to the ordered operations list.  That way we limit the total
 * work done by the commit
 */
#define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)

64
/* holds pointers to all of the tree roots */
65
#define BTRFS_ROOT_TREE_OBJECTID 1ULL
66 67

/* stores information about which extents are in use, and reference counts */
C
Chris Mason 已提交
68
#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
69 70 71 72 73

/*
 * chunk tree stores translations from logical -> physical block numbering
 * the super block points to the chunk tree
 */
74
#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
75 76 77 78 79

/*
 * stores information about which areas of a given device are in use.
 * one per device.  The tree of tree roots points to the device tree
 */
80 81 82 83 84 85 86
#define BTRFS_DEV_TREE_OBJECTID 4ULL

/* one per subvolume, storing files and directories */
#define BTRFS_FS_TREE_OBJECTID 5ULL

/* directory objectid inside the root tree */
#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
87

88 89 90
/* holds checksums of all the data extents */
#define BTRFS_CSUM_TREE_OBJECTID 7ULL

91 92 93
/* for storing balance parameters in the root tree */
#define BTRFS_BALANCE_OBJECTID -4ULL

A
Arne Jansen 已提交
94 95 96
/* holds quota configuration and tracking */
#define BTRFS_QUOTA_TREE_OBJECTID 8ULL

97 98 99
/* orhpan objectid for tracking unlinked/truncated files */
#define BTRFS_ORPHAN_OBJECTID -5ULL

100 101 102 103
/* does write ahead logging to speed up fsyncs */
#define BTRFS_TREE_LOG_OBJECTID -6ULL
#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL

Z
Zheng Yan 已提交
104 105 106 107
/* for space balancing */
#define BTRFS_TREE_RELOC_OBJECTID -8ULL
#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL

108 109 110 111 112 113 114
/*
 * extent checksums all have this objectid
 * this allows them to share the logging tree
 * for fsyncs
 */
#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL

115 116 117
/* For storing free space cache */
#define BTRFS_FREE_SPACE_OBJECTID -11ULL

118 119 120 121 122 123
/*
 * The inode number assigned to the special inode for sotring
 * free ino cache
 */
#define BTRFS_FREE_INO_OBJECTID -12ULL

Z
Zheng Yan 已提交
124 125 126
/* dummy objectid represents multiple objectids */
#define BTRFS_MULTIPLE_OBJECTIDS -255ULL

127
/*
128
 * All files have objectids in this range.
129
 */
130
#define BTRFS_FIRST_FREE_OBJECTID 256ULL
131
#define BTRFS_LAST_FREE_OBJECTID -256ULL
132
#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
133

134 135 136 137 138 139 140

/*
 * the device items go into the chunk tree.  The key is in the form
 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
 */
#define BTRFS_DEV_ITEMS_OBJECTID 1ULL

141 142 143 144
#define BTRFS_BTREE_INODE_OBJECTID 1

#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2

145 146 147 148 149 150
/*
 * the max metadata block size.  This limit is somewhat artificial,
 * but the memmove costs go through the roof for larger blocks.
 */
#define BTRFS_MAX_METADATA_BLOCKSIZE 65536

C
Chris Mason 已提交
151 152 153 154 155 156
/*
 * we can actually store much bigger names, but lets not confuse the rest
 * of linux
 */
#define BTRFS_NAME_LEN 255

M
Mark Fasheh 已提交
157 158 159 160 161 162 163
/*
 * Theoretical limit is larger, but we keep this down to a sane
 * value. That should limit greatly the possibility of collisions on
 * inode ref items.
 */
#define BTRFS_LINK_MAX 65535U

C
Chris Mason 已提交
164 165
/* 32 bytes in various csum fields */
#define BTRFS_CSUM_SIZE 32
166 167 168 169 170 171

/* csum types */
#define BTRFS_CSUM_TYPE_CRC32	0

static int btrfs_csum_sizes[] = { 4, 0 };

172
/* four bytes for CRC32 */
173
#define BTRFS_EMPTY_DIR_SIZE 0
C
Chris Mason 已提交
174

C
Chris Mason 已提交
175 176 177 178 179 180 181 182
#define BTRFS_FT_UNKNOWN	0
#define BTRFS_FT_REG_FILE	1
#define BTRFS_FT_DIR		2
#define BTRFS_FT_CHRDEV		3
#define BTRFS_FT_BLKDEV		4
#define BTRFS_FT_FIFO		5
#define BTRFS_FT_SOCK		6
#define BTRFS_FT_SYMLINK	7
J
Josef Bacik 已提交
183 184
#define BTRFS_FT_XATTR		8
#define BTRFS_FT_MAX		9
C
Chris Mason 已提交
185

186 187 188
/* ioprio of readahead is set to idle */
#define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))

189
/*
W
Wu Fengguang 已提交
190 191 192 193 194 195 196 197 198
 * The key defines the order in the tree, and so it also defines (optimal)
 * block layout.
 *
 * objectid corresponds to the inode number.
 *
 * type tells us things about the object, and is a kind of stream selector.
 * so for a given inode, keys with type of 1 might refer to the inode data,
 * type of 2 may point to file data in the btree and type == 3 may point to
 * extents.
199 200
 *
 * offset is the starting byte offset for this key in the stream.
C
Chris Mason 已提交
201 202 203 204
 *
 * btrfs_disk_key is in disk byte order.  struct btrfs_key is always
 * in cpu native order.  Otherwise they are identical and their sizes
 * should be the same (ie both packed)
205
 */
C
Chris Mason 已提交
206 207
struct btrfs_disk_key {
	__le64 objectid;
208
	u8 type;
209
	__le64 offset;
C
Chris Mason 已提交
210 211 212
} __attribute__ ((__packed__));

struct btrfs_key {
213
	u64 objectid;
214
	u8 type;
215
	u64 offset;
216 217
} __attribute__ ((__packed__));

218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243
struct btrfs_mapping_tree {
	struct extent_map_tree map_tree;
};

struct btrfs_dev_item {
	/* the internal btrfs device id */
	__le64 devid;

	/* size of the device */
	__le64 total_bytes;

	/* bytes used */
	__le64 bytes_used;

	/* optimal io alignment for this device */
	__le32 io_align;

	/* optimal io width for this device */
	__le32 io_width;

	/* minimal io size for this device */
	__le32 sector_size;

	/* type and info about this device */
	__le64 type;

Y
Yan Zheng 已提交
244 245 246
	/* expected generation for this device */
	__le64 generation;

247 248
	/*
	 * starting byte of this partition on the device,
W
Wu Fengguang 已提交
249
	 * to allow for stripe alignment in the future
250 251 252
	 */
	__le64 start_offset;

253 254 255 256 257 258 259 260 261
	/* grouping information for allocation decisions */
	__le32 dev_group;

	/* seek speed 0-100 where 100 is fastest */
	u8 seek_speed;

	/* bandwidth 0-100 where 100 is fastest */
	u8 bandwidth;

262
	/* btrfs generated uuid for this device */
263
	u8 uuid[BTRFS_UUID_SIZE];
Y
Yan Zheng 已提交
264 265 266

	/* uuid of FS who owns this device */
	u8 fsid[BTRFS_UUID_SIZE];
267 268 269 270 271
} __attribute__ ((__packed__));

struct btrfs_stripe {
	__le64 devid;
	__le64 offset;
272
	u8 dev_uuid[BTRFS_UUID_SIZE];
273 274 275
} __attribute__ ((__packed__));

struct btrfs_chunk {
276 277 278 279
	/* size of this chunk in bytes */
	__le64 length;

	/* objectid of the root referencing this chunk */
280
	__le64 owner;
281

282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297
	__le64 stripe_len;
	__le64 type;

	/* optimal io alignment for this chunk */
	__le32 io_align;

	/* optimal io width for this chunk */
	__le32 io_width;

	/* minimal io size for this chunk */
	__le32 sector_size;

	/* 2^16 stripes is quite a lot, a second limit is the size of a single
	 * item in the btree
	 */
	__le16 num_stripes;
C
Chris Mason 已提交
298 299 300

	/* sub stripes only matter for raid10 */
	__le16 sub_stripes;
301 302 303 304
	struct btrfs_stripe stripe;
	/* additional stripes go here */
} __attribute__ ((__packed__));

305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320
#define BTRFS_FREE_SPACE_EXTENT	1
#define BTRFS_FREE_SPACE_BITMAP	2

struct btrfs_free_space_entry {
	__le64 offset;
	__le64 bytes;
	u8 type;
} __attribute__ ((__packed__));

struct btrfs_free_space_header {
	struct btrfs_disk_key location;
	__le64 generation;
	__le64 num_entries;
	__le64 num_bitmaps;
} __attribute__ ((__packed__));

321 322 323 324 325 326 327
static inline unsigned long btrfs_chunk_item_size(int num_stripes)
{
	BUG_ON(num_stripes == 0);
	return sizeof(struct btrfs_chunk) +
		sizeof(struct btrfs_stripe) * (num_stripes - 1);
}

328 329
#define BTRFS_HEADER_FLAG_WRITTEN	(1ULL << 0)
#define BTRFS_HEADER_FLAG_RELOC		(1ULL << 1)
L
liubo 已提交
330 331 332 333 334 335 336 337

/*
 * File system states
 */

/* Errors detected */
#define BTRFS_SUPER_FLAG_ERROR		(1ULL << 2)

338 339 340 341 342 343 344 345 346 347
#define BTRFS_SUPER_FLAG_SEEDING	(1ULL << 32)
#define BTRFS_SUPER_FLAG_METADUMP	(1ULL << 33)

#define BTRFS_BACKREF_REV_MAX		256
#define BTRFS_BACKREF_REV_SHIFT		56
#define BTRFS_BACKREF_REV_MASK		(((u64)BTRFS_BACKREF_REV_MAX - 1) << \
					 BTRFS_BACKREF_REV_SHIFT)

#define BTRFS_OLD_BACKREF_REV		0
#define BTRFS_MIXED_BACKREF_REV		1
348

349 350 351
/*
 * every tree block (leaf or node) starts with this header.
 */
352
struct btrfs_header {
353
	/* these first four must match the super block */
C
Chris Mason 已提交
354
	u8 csum[BTRFS_CSUM_SIZE];
355
	u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
356
	__le64 bytenr; /* which block this node is supposed to live in */
357
	__le64 flags;
358 359 360

	/* allowed to be different from the super from here on down */
	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
361
	__le64 generation;
362
	__le64 owner;
363
	__le32 nritems;
364
	u8 level;
365 366
} __attribute__ ((__packed__));

367
#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
C
Chris Mason 已提交
368 369
				      sizeof(struct btrfs_header)) / \
				     sizeof(struct btrfs_key_ptr))
C
Chris Mason 已提交
370
#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
371
#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
372 373 374
#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
					sizeof(struct btrfs_item) - \
					sizeof(struct btrfs_file_extent_item))
375 376 377
#define BTRFS_MAX_XATTR_SIZE(r)	(BTRFS_LEAF_DATA_SIZE(r) - \
				 sizeof(struct btrfs_item) -\
				 sizeof(struct btrfs_dir_item))
378

379 380 381 382 383 384

/*
 * this is a very generous portion of the super block, giving us
 * room to translate 14 chunks with 3 stripes each.
 */
#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
385
#define BTRFS_LABEL_SIZE 256
386

C
Chris Mason 已提交
387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427
/*
 * just in case we somehow lose the roots and are not able to mount,
 * we store an array of the roots from previous transactions
 * in the super.
 */
#define BTRFS_NUM_BACKUP_ROOTS 4
struct btrfs_root_backup {
	__le64 tree_root;
	__le64 tree_root_gen;

	__le64 chunk_root;
	__le64 chunk_root_gen;

	__le64 extent_root;
	__le64 extent_root_gen;

	__le64 fs_root;
	__le64 fs_root_gen;

	__le64 dev_root;
	__le64 dev_root_gen;

	__le64 csum_root;
	__le64 csum_root_gen;

	__le64 total_bytes;
	__le64 bytes_used;
	__le64 num_devices;
	/* future */
	__le64 unsed_64[4];

	u8 tree_root_level;
	u8 chunk_root_level;
	u8 extent_root_level;
	u8 fs_root_level;
	u8 dev_root_level;
	u8 csum_root_level;
	/* future and to align */
	u8 unused_8[10];
} __attribute__ ((__packed__));

428 429 430 431
/*
 * the super block basically lists the main trees of the FS
 * it currently lacks any block count etc etc
 */
C
Chris Mason 已提交
432
struct btrfs_super_block {
C
Chris Mason 已提交
433
	u8 csum[BTRFS_CSUM_SIZE];
434
	/* the first 4 fields must match struct btrfs_header */
Y
Yan Zheng 已提交
435
	u8 fsid[BTRFS_FSID_SIZE];    /* FS specific uuid */
436
	__le64 bytenr; /* this block number */
437
	__le64 flags;
438 439

	/* allowed to be different from the btrfs_header from here own down */
440 441 442
	__le64 magic;
	__le64 generation;
	__le64 root;
443
	__le64 chunk_root;
444
	__le64 log_root;
445 446 447

	/* this will help find the new super based on the log root */
	__le64 log_root_transid;
448 449
	__le64 total_bytes;
	__le64 bytes_used;
450
	__le64 root_dir_objectid;
451
	__le64 num_devices;
452 453 454
	__le32 sectorsize;
	__le32 nodesize;
	__le32 leafsize;
455
	__le32 stripesize;
456
	__le32 sys_chunk_array_size;
457
	__le64 chunk_root_generation;
458 459 460
	__le64 compat_flags;
	__le64 compat_ro_flags;
	__le64 incompat_flags;
461
	__le16 csum_type;
462
	u8 root_level;
463
	u8 chunk_root_level;
464
	u8 log_root_level;
465
	struct btrfs_dev_item dev_item;
466

467
	char label[BTRFS_LABEL_SIZE];
468

469 470
	__le64 cache_generation;

471
	/* future expansion */
472
	__le64 reserved[31];
473
	u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
C
Chris Mason 已提交
474
	struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
C
Chris Mason 已提交
475 476
} __attribute__ ((__packed__));

477 478 479 480
/*
 * Compat flags that we support.  If any incompat flags are set other than the
 * ones specified below then we will fail to mount
 */
481
#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF	(1ULL << 0)
482
#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL	(1ULL << 1)
483
#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS	(1ULL << 2)
L
Li Zefan 已提交
484
#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO	(1ULL << 3)
485 486 487 488 489 490 491 492 493 494 495 496 497
/*
 * some patches floated around with a second compression method
 * lets save that incompat here for when they do get in
 * Note we don't actually support it, we're just reserving the
 * number
 */
#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2	(1ULL << 4)

/*
 * older kernels tried to do bigger metadata blocks, but the
 * code was pretty buggy.  Lets not let them try anymore.
 */
#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA	(1ULL << 5)
498

M
Mark Fasheh 已提交
499 500
#define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF	(1ULL << 6)

501 502
#define BTRFS_FEATURE_COMPAT_SUPP		0ULL
#define BTRFS_FEATURE_COMPAT_RO_SUPP		0ULL
503 504
#define BTRFS_FEATURE_INCOMPAT_SUPP			\
	(BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF |		\
505
	 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL |	\
L
Li Zefan 已提交
506
	 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS |		\
507
	 BTRFS_FEATURE_INCOMPAT_BIG_METADATA |		\
M
Mark Fasheh 已提交
508 509
	 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO |		\
	 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
510

511
/*
512
 * A leaf is full of items. offset and size tell us where to find
513 514
 * the item in the leaf (relative to the start of the data area)
 */
C
Chris Mason 已提交
515
struct btrfs_item {
C
Chris Mason 已提交
516
	struct btrfs_disk_key key;
C
Chris Mason 已提交
517
	__le32 offset;
518
	__le32 size;
519 520
} __attribute__ ((__packed__));

521 522 523 524 525 526 527
/*
 * leaves have an item area and a data area:
 * [item0, item1....itemN] [free space] [dataN...data1, data0]
 *
 * The data is separate from the items to get the keys closer together
 * during searches.
 */
C
Chris Mason 已提交
528
struct btrfs_leaf {
529
	struct btrfs_header header;
C
Chris Mason 已提交
530
	struct btrfs_item items[];
531 532
} __attribute__ ((__packed__));

533 534 535 536
/*
 * all non-leaf blocks are nodes, they hold only keys and pointers to
 * other blocks
 */
C
Chris Mason 已提交
537 538 539
struct btrfs_key_ptr {
	struct btrfs_disk_key key;
	__le64 blockptr;
540
	__le64 generation;
C
Chris Mason 已提交
541 542
} __attribute__ ((__packed__));

C
Chris Mason 已提交
543
struct btrfs_node {
544
	struct btrfs_header header;
C
Chris Mason 已提交
545
	struct btrfs_key_ptr ptrs[];
546 547
} __attribute__ ((__packed__));

548
/*
C
Chris Mason 已提交
549 550
 * btrfs_paths remember the path taken from the root down to the leaf.
 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
551 552 553 554 555
 * to any other levels that are present.
 *
 * The slots array records the index of the item or block pointer
 * used while walking the tree.
 */
C
Chris Mason 已提交
556
struct btrfs_path {
557
	struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
C
Chris Mason 已提交
558
	int slots[BTRFS_MAX_LEVEL];
559 560
	/* if there is real range locking, this locks field will change */
	int locks[BTRFS_MAX_LEVEL];
561
	int reada;
562
	/* keep some upper locks as we walk down */
563
	int lowest_level;
564 565 566 567 568

	/*
	 * set by btrfs_split_item, tells search_slot to keep all locks
	 * and to force calls to keep space in the nodes
	 */
569 570 571 572
	unsigned int search_for_split:1;
	unsigned int keep_locks:1;
	unsigned int skip_locking:1;
	unsigned int leave_spinning:1;
573
	unsigned int search_commit_root:1;
574
};
C
Chris Mason 已提交
575

576 577 578 579
/*
 * items in the extent btree are used to record the objectid of the
 * owner of the block and the number of references
 */
580

581
struct btrfs_extent_item {
582 583 584 585 586 587
	__le64 refs;
	__le64 generation;
	__le64 flags;
} __attribute__ ((__packed__));

struct btrfs_extent_item_v0 {
588
	__le32 refs;
589 590
} __attribute__ ((__packed__));

591 592 593 594 595 596 597 598 599 600 601
#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
					sizeof(struct btrfs_item))

#define BTRFS_EXTENT_FLAG_DATA		(1ULL << 0)
#define BTRFS_EXTENT_FLAG_TREE_BLOCK	(1ULL << 1)

/* following flags only apply to tree blocks */

/* use full backrefs for extent pointers in the block */
#define BTRFS_BLOCK_FLAG_FULL_BACKREF	(1ULL << 8)

A
Arne Jansen 已提交
602 603 604 605 606 607
/*
 * this flag is only used internally by scrub and may be changed at any time
 * it is only declared here to avoid collisions
 */
#define BTRFS_EXTENT_FLAG_SUPER		(1ULL << 48)

608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625
struct btrfs_tree_block_info {
	struct btrfs_disk_key key;
	u8 level;
} __attribute__ ((__packed__));

struct btrfs_extent_data_ref {
	__le64 root;
	__le64 objectid;
	__le64 offset;
	__le32 count;
} __attribute__ ((__packed__));

struct btrfs_shared_data_ref {
	__le32 count;
} __attribute__ ((__packed__));

struct btrfs_extent_inline_ref {
	u8 type;
626
	__le64 offset;
627 628 629 630
} __attribute__ ((__packed__));

/* old style backrefs item */
struct btrfs_extent_ref_v0 {
631 632 633
	__le64 root;
	__le64 generation;
	__le64 objectid;
634
	__le32 count;
635 636
} __attribute__ ((__packed__));

637

638 639
/* dev extents record free space on individual devices.  The owner
 * field points back to the chunk allocation mapping tree that allocated
640
 * the extent.  The chunk tree uuid field is a way to double check the owner
641 642
 */
struct btrfs_dev_extent {
643 644 645
	__le64 chunk_tree;
	__le64 chunk_objectid;
	__le64 chunk_offset;
646
	__le64 length;
647
	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
648 649
} __attribute__ ((__packed__));

650
struct btrfs_inode_ref {
651
	__le64 index;
652 653 654 655
	__le16 name_len;
	/* name goes here */
} __attribute__ ((__packed__));

M
Mark Fasheh 已提交
656 657 658 659 660 661 662 663
struct btrfs_inode_extref {
	__le64 parent_objectid;
	__le64 index;
	__le16 name_len;
	__u8   name[0];
	/* name goes here */
} __attribute__ ((__packed__));

664
struct btrfs_timespec {
C
Chris Mason 已提交
665
	__le64 sec;
C
Chris Mason 已提交
666 667 668
	__le32 nsec;
} __attribute__ ((__packed__));

J
Jan Engelhardt 已提交
669
enum btrfs_compression_type {
670 671
	BTRFS_COMPRESS_NONE  = 0,
	BTRFS_COMPRESS_ZLIB  = 1,
L
Li Zefan 已提交
672 673 674
	BTRFS_COMPRESS_LZO   = 2,
	BTRFS_COMPRESS_TYPES = 2,
	BTRFS_COMPRESS_LAST  = 3,
J
Jan Engelhardt 已提交
675
};
C
Chris Mason 已提交
676

C
Chris Mason 已提交
677
struct btrfs_inode_item {
678
	/* nfs style generation number */
C
Chris Mason 已提交
679
	__le64 generation;
680 681
	/* transid that last touched this inode */
	__le64 transid;
C
Chris Mason 已提交
682
	__le64 size;
683
	__le64 nbytes;
684
	__le64 block_group;
C
Chris Mason 已提交
685 686 687 688
	__le32 nlink;
	__le32 uid;
	__le32 gid;
	__le32 mode;
689
	__le64 rdev;
690
	__le64 flags;
C
Chris Mason 已提交
691

692 693 694 695 696 697 698 699
	/* modification sequence number for NFS */
	__le64 sequence;

	/*
	 * a little future expansion, for more than this we can
	 * just grow the inode item and version it
	 */
	__le64 reserved[4];
700 701 702 703
	struct btrfs_timespec atime;
	struct btrfs_timespec ctime;
	struct btrfs_timespec mtime;
	struct btrfs_timespec otime;
C
Chris Mason 已提交
704 705
} __attribute__ ((__packed__));

706 707 708 709
struct btrfs_dir_log_item {
	__le64 end;
} __attribute__ ((__packed__));

710
struct btrfs_dir_item {
711
	struct btrfs_disk_key location;
712
	__le64 transid;
J
Josef Bacik 已提交
713
	__le16 data_len;
714
	__le16 name_len;
715 716 717
	u8 type;
} __attribute__ ((__packed__));

L
Li Zefan 已提交
718 719
#define BTRFS_ROOT_SUBVOL_RDONLY	(1ULL << 0)

720
struct btrfs_root_item {
721
	struct btrfs_inode_item inode;
722
	__le64 generation;
723
	__le64 root_dirid;
724 725 726
	__le64 bytenr;
	__le64 byte_limit;
	__le64 bytes_used;
Y
Yan Zheng 已提交
727
	__le64 last_snapshot;
728
	__le64 flags;
729
	__le32 refs;
730 731
	struct btrfs_disk_key drop_progress;
	u8 drop_level;
732
	u8 level;
733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762

	/*
	 * The following fields appear after subvol_uuids+subvol_times
	 * were introduced.
	 */

	/*
	 * This generation number is used to test if the new fields are valid
	 * and up to date while reading the root item. Everytime the root item
	 * is written out, the "generation" field is copied into this field. If
	 * anyone ever mounted the fs with an older kernel, we will have
	 * mismatching generation values here and thus must invalidate the
	 * new fields. See btrfs_update_root and btrfs_find_last_root for
	 * details.
	 * the offset of generation_v2 is also used as the start for the memset
	 * when invalidating the fields.
	 */
	__le64 generation_v2;
	u8 uuid[BTRFS_UUID_SIZE];
	u8 parent_uuid[BTRFS_UUID_SIZE];
	u8 received_uuid[BTRFS_UUID_SIZE];
	__le64 ctransid; /* updated when an inode changes */
	__le64 otransid; /* trans when created */
	__le64 stransid; /* trans when sent. non-zero for received subvol */
	__le64 rtransid; /* trans when received. non-zero for received subvol */
	struct btrfs_timespec ctime;
	struct btrfs_timespec otime;
	struct btrfs_timespec stime;
	struct btrfs_timespec rtime;
	__le64 reserved[8]; /* for future */
763
} __attribute__ ((__packed__));
764

765 766 767 768 769 770 771 772 773
/*
 * this is used for both forward and backward root refs
 */
struct btrfs_root_ref {
	__le64 dirid;
	__le64 sequence;
	__le16 name_len;
} __attribute__ ((__packed__));

774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821
struct btrfs_disk_balance_args {
	/*
	 * profiles to operate on, single is denoted by
	 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
	 */
	__le64 profiles;

	/* usage filter */
	__le64 usage;

	/* devid filter */
	__le64 devid;

	/* devid subset filter [pstart..pend) */
	__le64 pstart;
	__le64 pend;

	/* btrfs virtual address space subset filter [vstart..vend) */
	__le64 vstart;
	__le64 vend;

	/*
	 * profile to convert to, single is denoted by
	 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
	 */
	__le64 target;

	/* BTRFS_BALANCE_ARGS_* */
	__le64 flags;

	__le64 unused[8];
} __attribute__ ((__packed__));

/*
 * store balance parameters to disk so that balance can be properly
 * resumed after crash or unmount
 */
struct btrfs_balance_item {
	/* BTRFS_BALANCE_* */
	__le64 flags;

	struct btrfs_disk_balance_args data;
	struct btrfs_disk_balance_args meta;
	struct btrfs_disk_balance_args sys;

	__le64 unused[4];
} __attribute__ ((__packed__));

Y
Yan Zheng 已提交
822 823 824
#define BTRFS_FILE_EXTENT_INLINE 0
#define BTRFS_FILE_EXTENT_REG 1
#define BTRFS_FILE_EXTENT_PREALLOC 2
825

826
struct btrfs_file_extent_item {
C
Chris Mason 已提交
827 828 829
	/*
	 * transaction id that created this extent
	 */
830
	__le64 generation;
C
Chris Mason 已提交
831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851
	/*
	 * max number of bytes to hold this extent in ram
	 * when we split a compressed extent we can't know how big
	 * each of the resulting pieces will be.  So, this is
	 * an upper limit on the size of the extent in ram instead of
	 * an exact limit.
	 */
	__le64 ram_bytes;

	/*
	 * 32 bits for the various ways we might encode the data,
	 * including compression and encryption.  If any of these
	 * are set to something a given disk format doesn't understand
	 * it is treated like an incompat flag for reading and writing,
	 * but not for stat.
	 */
	u8 compression;
	u8 encryption;
	__le16 other_encoding; /* spare for later use */

	/* are we inline data or a real extent? */
852
	u8 type;
C
Chris Mason 已提交
853

854 855 856 857
	/*
	 * disk space consumed by the extent, checksum blocks are included
	 * in these numbers
	 */
858 859
	__le64 disk_bytenr;
	__le64 disk_num_bytes;
860
	/*
C
Chris Mason 已提交
861
	 * the logical offset in file blocks (no csums)
862 863 864 865 866 867 868
	 * this extent record is for.  This allows a file extent to point
	 * into the middle of an existing extent on disk, sharing it
	 * between two snapshots (useful if some bytes in the middle of the
	 * extent have changed
	 */
	__le64 offset;
	/*
C
Chris Mason 已提交
869 870
	 * the logical number of file blocks (no csums included).  This
	 * always reflects the size uncompressed and without encoding.
871
	 */
872
	__le64 num_bytes;
C
Chris Mason 已提交
873

874 875
} __attribute__ ((__packed__));

C
Chris Mason 已提交
876
struct btrfs_csum_item {
877
	u8 csum;
C
Chris Mason 已提交
878 879
} __attribute__ ((__packed__));

880 881 882 883 884 885 886 887
struct btrfs_dev_stats_item {
	/*
	 * grow this item struct at the end for future enhancements and keep
	 * the existing values unchanged
	 */
	__le64 values[BTRFS_DEV_STAT_VALUES_MAX];
} __attribute__ ((__packed__));

888
/* different types of block groups (and chunks) */
889 890 891 892 893 894 895
#define BTRFS_BLOCK_GROUP_DATA		(1ULL << 0)
#define BTRFS_BLOCK_GROUP_SYSTEM	(1ULL << 1)
#define BTRFS_BLOCK_GROUP_METADATA	(1ULL << 2)
#define BTRFS_BLOCK_GROUP_RAID0		(1ULL << 3)
#define BTRFS_BLOCK_GROUP_RAID1		(1ULL << 4)
#define BTRFS_BLOCK_GROUP_DUP		(1ULL << 5)
#define BTRFS_BLOCK_GROUP_RAID10	(1ULL << 6)
896
#define BTRFS_BLOCK_GROUP_RESERVED	BTRFS_AVAIL_ALLOC_BIT_SINGLE
897 898 899 900 901 902 903 904 905 906
#define BTRFS_NR_RAID_TYPES		5

#define BTRFS_BLOCK_GROUP_TYPE_MASK	(BTRFS_BLOCK_GROUP_DATA |    \
					 BTRFS_BLOCK_GROUP_SYSTEM |  \
					 BTRFS_BLOCK_GROUP_METADATA)

#define BTRFS_BLOCK_GROUP_PROFILE_MASK	(BTRFS_BLOCK_GROUP_RAID0 |   \
					 BTRFS_BLOCK_GROUP_RAID1 |   \
					 BTRFS_BLOCK_GROUP_DUP |     \
					 BTRFS_BLOCK_GROUP_RAID10)
907 908 909 910 911 912 913 914 915
/*
 * We need a bit for restriper to be able to tell when chunks of type
 * SINGLE are available.  This "extended" profile format is used in
 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
 * (on-disk).  The corresponding on-disk bit in chunk.type is reserved
 * to avoid remappings between two formats in future.
 */
#define BTRFS_AVAIL_ALLOC_BIT_SINGLE	(1ULL << 48)

916 917 918 919 920 921 922 923 924 925 926 927 928 929 930
#define BTRFS_EXTENDED_PROFILE_MASK	(BTRFS_BLOCK_GROUP_PROFILE_MASK | \
					 BTRFS_AVAIL_ALLOC_BIT_SINGLE)

static inline u64 chunk_to_extended(u64 flags)
{
	if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
		flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;

	return flags;
}
static inline u64 extended_to_chunk(u64 flags)
{
	return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
}

C
Chris Mason 已提交
931 932
struct btrfs_block_group_item {
	__le64 used;
933 934
	__le64 chunk_objectid;
	__le64 flags;
C
Chris Mason 已提交
935 936
} __attribute__ ((__packed__));

A
Arne Jansen 已提交
937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002
/*
 * is subvolume quota turned on?
 */
#define BTRFS_QGROUP_STATUS_FLAG_ON		(1ULL << 0)
/*
 * SCANNING is set during the initialization phase
 */
#define BTRFS_QGROUP_STATUS_FLAG_SCANNING	(1ULL << 1)
/*
 * Some qgroup entries are known to be out of date,
 * either because the configuration has changed in a way that
 * makes a rescan necessary, or because the fs has been mounted
 * with a non-qgroup-aware version.
 * Turning qouta off and on again makes it inconsistent, too.
 */
#define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT	(1ULL << 2)

#define BTRFS_QGROUP_STATUS_VERSION        1

struct btrfs_qgroup_status_item {
	__le64 version;
	/*
	 * the generation is updated during every commit. As older
	 * versions of btrfs are not aware of qgroups, it will be
	 * possible to detect inconsistencies by checking the
	 * generation on mount time
	 */
	__le64 generation;

	/* flag definitions see above */
	__le64 flags;

	/*
	 * only used during scanning to record the progress
	 * of the scan. It contains a logical address
	 */
	__le64 scan;
} __attribute__ ((__packed__));

struct btrfs_qgroup_info_item {
	__le64 generation;
	__le64 rfer;
	__le64 rfer_cmpr;
	__le64 excl;
	__le64 excl_cmpr;
} __attribute__ ((__packed__));

/* flags definition for qgroup limits */
#define BTRFS_QGROUP_LIMIT_MAX_RFER	(1ULL << 0)
#define BTRFS_QGROUP_LIMIT_MAX_EXCL	(1ULL << 1)
#define BTRFS_QGROUP_LIMIT_RSV_RFER	(1ULL << 2)
#define BTRFS_QGROUP_LIMIT_RSV_EXCL	(1ULL << 3)
#define BTRFS_QGROUP_LIMIT_RFER_CMPR	(1ULL << 4)
#define BTRFS_QGROUP_LIMIT_EXCL_CMPR	(1ULL << 5)

struct btrfs_qgroup_limit_item {
	/*
	 * only updated when any of the other values change
	 */
	__le64 flags;
	__le64 max_rfer;
	__le64 max_excl;
	__le64 rsv_rfer;
	__le64 rsv_excl;
} __attribute__ ((__packed__));

1003 1004
struct btrfs_space_info {
	u64 flags;
J
Josef Bacik 已提交
1005

J
Josef Bacik 已提交
1006 1007
	u64 total_bytes;	/* total bytes in the space,
				   this doesn't take mirrors into account */
1008
	u64 bytes_used;		/* total bytes used,
1009
				   this doesn't take mirrors into account */
J
Josef Bacik 已提交
1010 1011 1012 1013 1014
	u64 bytes_pinned;	/* total bytes pinned, will be freed when the
				   transaction finishes */
	u64 bytes_reserved;	/* total bytes the allocator has reserved for
				   current allocations */
	u64 bytes_readonly;	/* total bytes that are read only */
1015

J
Josef Bacik 已提交
1016
	u64 bytes_may_use;	/* number of bytes that may be used for
J
Josef Bacik 已提交
1017
				   delalloc/allocations */
1018
	u64 disk_used;		/* total bytes used on disk */
J
Josef Bacik 已提交
1019 1020
	u64 disk_total;		/* total bytes on disk, takes mirrors into
				   account */
J
Josef Bacik 已提交
1021

1022 1023 1024 1025 1026 1027 1028 1029 1030
	/*
	 * we bump reservation progress every time we decrement
	 * bytes_reserved.  This way people waiting for reservations
	 * know something good has happened and they can check
	 * for progress.  The number here isn't to be trusted, it
	 * just shows reclaim activity
	 */
	unsigned long reservation_progress;

1031
	unsigned int full:1;	/* indicates that we cannot allocate any more
J
Josef Bacik 已提交
1032
				   chunks for this space */
1033
	unsigned int chunk_alloc:1;	/* set if we are allocating a chunk */
1034

1035 1036
	unsigned int flush:1;		/* set if we are trying to make space */

1037 1038
	unsigned int force_alloc;	/* set if we need to force a chunk
					   alloc for this space */
J
Josef Bacik 已提交
1039

1040
	struct list_head list;
J
Josef Bacik 已提交
1041 1042

	/* for block groups in our same type */
1043
	struct list_head block_groups[BTRFS_NR_RAID_TYPES];
J
Josef Bacik 已提交
1044
	spinlock_t lock;
1045
	struct rw_semaphore groups_sem;
1046
	wait_queue_head_t wait;
J
Josef Bacik 已提交
1047 1048
};

1049 1050 1051 1052 1053 1054 1055 1056
#define	BTRFS_BLOCK_RSV_GLOBAL		1
#define	BTRFS_BLOCK_RSV_DELALLOC	2
#define	BTRFS_BLOCK_RSV_TRANS		3
#define	BTRFS_BLOCK_RSV_CHUNK		4
#define	BTRFS_BLOCK_RSV_DELOPS		5
#define	BTRFS_BLOCK_RSV_EMPTY		6
#define	BTRFS_BLOCK_RSV_TEMP		7

1057 1058 1059 1060 1061
struct btrfs_block_rsv {
	u64 size;
	u64 reserved;
	struct btrfs_space_info *space_info;
	spinlock_t lock;
1062 1063 1064
	unsigned short full;
	unsigned short type;
	unsigned short failfast;
1065 1066
};

1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089
/*
 * free clusters are used to claim free space in relatively large chunks,
 * allowing us to do less seeky writes.  They are used for all metadata
 * allocations and data allocations in ssd mode.
 */
struct btrfs_free_cluster {
	spinlock_t lock;
	spinlock_t refill_lock;
	struct rb_root root;

	/* largest extent in this cluster */
	u64 max_size;

	/* first extent starting offset */
	u64 window_start;

	struct btrfs_block_group_cache *block_group;
	/*
	 * when a cluster is allocated from a block group, we put the
	 * cluster onto a list in the block group so that it can
	 * be freed before the block group is freed.
	 */
	struct list_head block_group_list;
1090 1091
};

J
Josef Bacik 已提交
1092 1093 1094
enum btrfs_caching_type {
	BTRFS_CACHE_NO		= 0,
	BTRFS_CACHE_STARTED	= 1,
1095 1096
	BTRFS_CACHE_FAST	= 2,
	BTRFS_CACHE_FINISHED	= 3,
J
Josef Bacik 已提交
1097 1098
};

1099 1100 1101 1102 1103 1104 1105 1106
enum btrfs_disk_cache_state {
	BTRFS_DC_WRITTEN	= 0,
	BTRFS_DC_ERROR		= 1,
	BTRFS_DC_CLEAR		= 2,
	BTRFS_DC_SETUP		= 3,
	BTRFS_DC_NEED_WRITE	= 4,
};

1107 1108 1109 1110
struct btrfs_caching_control {
	struct list_head list;
	struct mutex mutex;
	wait_queue_head_t wait;
1111
	struct btrfs_work work;
1112 1113 1114 1115 1116
	struct btrfs_block_group_cache *block_group;
	u64 progress;
	atomic_t count;
};

C
Chris Mason 已提交
1117 1118 1119
struct btrfs_block_group_cache {
	struct btrfs_key key;
	struct btrfs_block_group_item item;
J
Josef Bacik 已提交
1120
	struct btrfs_fs_info *fs_info;
1121
	struct inode *inode;
1122
	spinlock_t lock;
1123
	u64 pinned;
1124
	u64 reserved;
1125
	u64 bytes_super;
1126
	u64 flags;
1127
	u64 sectorsize;
1128
	u64 cache_generation;
1129 1130 1131
	unsigned int ro:1;
	unsigned int dirty:1;
	unsigned int iref:1;
1132 1133

	int disk_cache_state;
J
Josef Bacik 已提交
1134

J
Josef Bacik 已提交
1135 1136
	/* cache tracking stuff */
	int cached;
1137 1138
	struct btrfs_caching_control *caching_ctl;
	u64 last_byte_to_unpin;
J
Josef Bacik 已提交
1139

J
Josef Bacik 已提交
1140 1141 1142
	struct btrfs_space_info *space_info;

	/* free space cache stuff */
1143
	struct btrfs_free_space_ctl *free_space_ctl;
J
Josef Bacik 已提交
1144 1145 1146 1147 1148 1149

	/* block group cache stuff */
	struct rb_node cache_node;

	/* for block groups in the same raid type */
	struct list_head list;
1150 1151 1152

	/* usage count */
	atomic_t count;
1153 1154 1155 1156 1157

	/* List of struct btrfs_free_clusters for this block group.
	 * Today it will only have one thing on it, but that may change
	 */
	struct list_head cluster_list;
1158 1159 1160

	/* For delayed block group creation */
	struct list_head new_bg_list;
C
Chris Mason 已提交
1161
};
1162

1163 1164 1165 1166 1167 1168 1169
/* delayed seq elem */
struct seq_list {
	struct list_head list;
	u64 seq;
};

/* fs_info */
1170
struct reloc_control;
1171
struct btrfs_device;
1172
struct btrfs_fs_devices;
1173
struct btrfs_balance_control;
1174
struct btrfs_delayed_root;
1175
struct btrfs_fs_info {
1176
	u8 fsid[BTRFS_FSID_SIZE];
1177
	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1178 1179
	struct btrfs_root *extent_root;
	struct btrfs_root *tree_root;
1180 1181
	struct btrfs_root *chunk_root;
	struct btrfs_root *dev_root;
1182
	struct btrfs_root *fs_root;
1183
	struct btrfs_root *csum_root;
1184
	struct btrfs_root *quota_root;
1185 1186 1187

	/* the log root tree is a directory of all the other log roots */
	struct btrfs_root *log_root_tree;
1188 1189

	spinlock_t fs_roots_radix_lock;
1190
	struct radix_tree_root fs_roots_radix;
1191

J
Josef Bacik 已提交
1192 1193 1194 1195
	/* block group cache stuff */
	spinlock_t block_group_cache_lock;
	struct rb_root block_group_cache_tree;

1196 1197 1198 1199
	/* keep track of unallocated space */
	spinlock_t free_chunk_lock;
	u64 free_chunk_space;

1200 1201
	struct extent_io_tree freed_extents[2];
	struct extent_io_tree *pinned_extents;
1202

1203 1204 1205
	/* logical->physical extent mapping */
	struct btrfs_mapping_tree mapping_tree;

1206 1207 1208 1209
	/*
	 * block reservation for extent, checksum, root tree and
	 * delayed dir index item
	 */
1210 1211 1212 1213 1214 1215 1216
	struct btrfs_block_rsv global_block_rsv;
	/* block reservation for delay allocation */
	struct btrfs_block_rsv delalloc_block_rsv;
	/* block reservation for metadata operations */
	struct btrfs_block_rsv trans_block_rsv;
	/* block reservation for chunk tree */
	struct btrfs_block_rsv chunk_block_rsv;
1217 1218
	/* block reservation for delayed operations */
	struct btrfs_block_rsv delayed_block_rsv;
1219 1220 1221

	struct btrfs_block_rsv empty_block_rsv;

1222
	u64 generation;
1223
	u64 last_trans_committed;
1224 1225 1226 1227 1228 1229

	/*
	 * this is updated to the current trans every time a full commit
	 * is required instead of the faster short fsync log commits
	 */
	u64 last_trans_log_full_commit;
1230
	unsigned long mount_opt;
1231
	unsigned long compress_type:4;
1232
	u64 max_inline;
1233
	u64 alloc_start;
C
Chris Mason 已提交
1234
	struct btrfs_transaction *running_transaction;
1235
	wait_queue_head_t transaction_throttle;
1236
	wait_queue_head_t transaction_wait;
S
Sage Weil 已提交
1237
	wait_queue_head_t transaction_blocked_wait;
1238
	wait_queue_head_t async_submit_wait;
1239

1240 1241
	struct btrfs_super_block *super_copy;
	struct btrfs_super_block *super_for_commit;
1242
	struct block_device *__bdev;
C
Chris Mason 已提交
1243
	struct super_block *sb;
1244
	struct inode *btree_inode;
C
Chris Mason 已提交
1245
	struct backing_dev_info bdi;
1246
	struct mutex tree_log_mutex;
1247 1248
	struct mutex transaction_kthread_mutex;
	struct mutex cleaner_mutex;
1249
	struct mutex chunk_mutex;
1250
	struct mutex volume_mutex;
1251 1252 1253 1254 1255 1256 1257 1258
	/*
	 * this protects the ordered operations list only while we are
	 * processing all of the entries on it.  This way we make
	 * sure the commit code doesn't find the list temporarily empty
	 * because another function happens to be doing non-waiting preflush
	 * before jumping into the main commit.
	 */
	struct mutex ordered_operations_mutex;
1259
	struct rw_semaphore extent_commit_sem;
1260

1261
	struct rw_semaphore cleanup_work_sem;
1262

1263
	struct rw_semaphore subvol_sem;
1264 1265
	struct srcu_struct subvol_srcu;

J
Josef Bacik 已提交
1266
	spinlock_t trans_lock;
C
Chris Mason 已提交
1267 1268 1269 1270 1271 1272
	/*
	 * the reloc mutex goes with the trans lock, it is taken
	 * during commit to protect us from the relocation code
	 */
	struct mutex reloc_mutex;

C
Chris Mason 已提交
1273
	struct list_head trans_list;
1274
	struct list_head dead_roots;
1275
	struct list_head caching_block_groups;
1276

Y
Yan, Zheng 已提交
1277 1278 1279
	spinlock_t delayed_iput_lock;
	struct list_head delayed_iputs;

J
Jan Schmidt 已提交
1280 1281 1282 1283
	/* this protects tree_mod_seq_list */
	spinlock_t tree_mod_seq_lock;
	atomic_t tree_mod_seq;
	struct list_head tree_mod_seq_list;
1284
	struct seq_list tree_mod_seq_elem;
J
Jan Schmidt 已提交
1285 1286 1287 1288 1289

	/* this protects tree_mod_log */
	rwlock_t tree_mod_log_lock;
	struct rb_root tree_mod_log;

1290
	atomic_t nr_async_submits;
1291
	atomic_t async_submit_draining;
1292
	atomic_t nr_async_bios;
1293
	atomic_t async_delalloc_pages;
J
Josef Bacik 已提交
1294
	atomic_t open_ioctl_trans;
1295

1296 1297 1298 1299 1300
	/*
	 * this is used by the balancing code to wait for all the pending
	 * ordered extents
	 */
	spinlock_t ordered_extent_lock;
1301 1302 1303 1304 1305 1306

	/*
	 * all of the data=ordered extents pending writeback
	 * these can span multiple transactions and basically include
	 * every dirty data page that isn't from nodatacow
	 */
1307
	struct list_head ordered_extents;
1308 1309 1310 1311 1312 1313

	/*
	 * all of the inodes that have delalloc bytes.  It is possible for
	 * this list to be empty even when there is still dirty data=ordered
	 * extents waiting to finish IO.
	 */
1314
	struct list_head delalloc_inodes;
1315

1316 1317 1318 1319 1320 1321 1322
	/*
	 * special rename and truncate targets that must be on disk before
	 * we're allowed to commit.  This is basically the ext3 style
	 * data=ordered list.
	 */
	struct list_head ordered_operations;

1323 1324 1325 1326 1327 1328
	/*
	 * there is a pool of worker threads for checksumming during writes
	 * and a pool for checksumming after reads.  This is because readers
	 * can run with FS locks held, and the writers may be waiting for
	 * those locks.  We don't want ordering in the pending list to cause
	 * deadlocks, and so the two are serviced separately.
1329 1330 1331
	 *
	 * A third pool does submit_bio to avoid deadlocking with the other
	 * two
1332
	 */
1333
	struct btrfs_workers generic_worker;
1334
	struct btrfs_workers workers;
1335
	struct btrfs_workers delalloc_workers;
1336
	struct btrfs_workers endio_workers;
1337
	struct btrfs_workers endio_meta_workers;
1338
	struct btrfs_workers endio_meta_write_workers;
1339
	struct btrfs_workers endio_write_workers;
J
Josef Bacik 已提交
1340
	struct btrfs_workers endio_freespace_worker;
1341
	struct btrfs_workers submit_workers;
1342
	struct btrfs_workers caching_workers;
1343
	struct btrfs_workers readahead_workers;
1344

1345 1346 1347 1348 1349 1350
	/*
	 * fixup workers take dirty pages that didn't properly go through
	 * the cow mechanism and make them safe to write.  It happens
	 * for the sys_munmap function call path
	 */
	struct btrfs_workers fixup_workers;
1351
	struct btrfs_workers delayed_workers;
1352 1353
	struct task_struct *transaction_kthread;
	struct task_struct *cleaner_kthread;
1354
	int thread_pool_size;
1355

1356 1357
	struct kobject super_kobj;
	struct completion kobj_unregister;
1358
	int do_barriers;
1359
	int closing;
1360
	int log_root_recovering;
1361
	int enospc_unlink;
J
Josef Bacik 已提交
1362
	int trans_no_join;
1363

1364
	u64 total_pinned;
1365 1366 1367 1368 1369

	/* protected by the delalloc lock, used to keep from writing
	 * metadata until there is a nice batch
	 */
	u64 dirty_metadata_bytes;
1370 1371
	struct list_head dirty_cowonly_roots;

1372
	struct btrfs_fs_devices *fs_devices;
1373 1374 1375 1376 1377 1378

	/*
	 * the space_info list is almost entirely read only.  It only changes
	 * when we add a new raid type to the FS, and that happens
	 * very rarely.  RCU is used to protect it.
	 */
1379
	struct list_head space_info;
1380

1381 1382
	struct btrfs_space_info *data_sinfo;

1383 1384
	struct reloc_control *reloc_ctl;

1385 1386
	spinlock_t delalloc_lock;
	u64 delalloc_bytes;
1387 1388 1389 1390 1391 1392

	/* data_alloc_cluster is only used in ssd mode */
	struct btrfs_free_cluster data_alloc_cluster;

	/* all metadata allocations go through this cluster */
	struct btrfs_free_cluster meta_alloc_cluster;
C
Chris Mason 已提交
1393

C
Chris Mason 已提交
1394 1395 1396 1397 1398
	/* auto defrag inodes go here */
	spinlock_t defrag_inodes_lock;
	struct rb_root defrag_inodes;
	atomic_t defrag_running;

1399 1400 1401 1402 1403
	/*
	 * these three are in extended format (availability of single
	 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
	 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
	 */
C
Chris Mason 已提交
1404 1405 1406
	u64 avail_data_alloc_bits;
	u64 avail_metadata_alloc_bits;
	u64 avail_system_alloc_bits;
1407

1408 1409 1410
	/* restriper state */
	spinlock_t balance_lock;
	struct mutex balance_mutex;
1411 1412
	atomic_t balance_running;
	atomic_t balance_pause_req;
1413
	atomic_t balance_cancel_req;
1414
	struct btrfs_balance_control *balance_ctl;
1415
	wait_queue_head_t balance_wait_q;
1416

1417 1418 1419
	unsigned data_chunk_allocations;
	unsigned metadata_ratio;

1420
	void *bdev_holder;
L
liubo 已提交
1421

A
Arne Jansen 已提交
1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432
	/* private scrub information */
	struct mutex scrub_lock;
	atomic_t scrubs_running;
	atomic_t scrub_pause_req;
	atomic_t scrubs_paused;
	atomic_t scrub_cancel_req;
	wait_queue_head_t scrub_pause_wait;
	struct rw_semaphore scrub_super_lock;
	int scrub_workers_refcnt;
	struct btrfs_workers scrub_workers;

1433 1434 1435
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
	u32 check_integrity_print_mask;
#endif
1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458
	/*
	 * quota information
	 */
	unsigned int quota_enabled:1;

	/*
	 * quota_enabled only changes state after a commit. This holds the
	 * next state.
	 */
	unsigned int pending_quota_state:1;

	/* is qgroup tracking in a consistent state? */
	u64 qgroup_flags;

	/* holds configuration and tracking. Protected by qgroup_lock */
	struct rb_root qgroup_tree;
	spinlock_t qgroup_lock;

	/* list of dirty qgroups to be written at next commit */
	struct list_head dirty_qgroups;

	/* used by btrfs_qgroup_record_ref for an efficient tree traversal */
	u64 qgroup_seq;
1459

L
liubo 已提交
1460 1461
	/* filesystem state */
	u64 fs_state;
1462 1463

	struct btrfs_delayed_root *delayed_root;
C
Chris Mason 已提交
1464

1465 1466 1467
	/* readahead tree */
	spinlock_t reada_lock;
	struct radix_tree_root reada_tree;
1468

C
Chris Mason 已提交
1469 1470
	/* next backup root to be overwritten */
	int backup_root_index;
1471 1472

	int num_tolerated_disk_barrier_failures;
1473
};
1474

1475 1476
/*
 * in ram representation of the tree.  extent_root is used for all allocations
1477
 * and for the extent tree extent_root root.
1478 1479
 */
struct btrfs_root {
1480
	struct extent_buffer *node;
1481

1482
	struct extent_buffer *commit_root;
1483
	struct btrfs_root *log_root;
Z
Zheng Yan 已提交
1484
	struct btrfs_root *reloc_root;
Y
Yan Zheng 已提交
1485

1486 1487
	struct btrfs_root_item root_item;
	struct btrfs_key root_key;
1488
	struct btrfs_fs_info *fs_info;
1489 1490
	struct extent_io_tree dirty_log_pages;

1491 1492
	struct kobject root_kobj;
	struct completion kobj_unregister;
1493
	struct mutex objectid_mutex;
Y
Yan Zheng 已提交
1494

1495 1496 1497
	spinlock_t accounting_lock;
	struct btrfs_block_rsv *block_rsv;

1498 1499 1500 1501 1502 1503 1504 1505
	/* free ino cache stuff */
	struct mutex fs_commit_mutex;
	struct btrfs_free_space_ctl *free_ino_ctl;
	enum btrfs_caching_type cached;
	spinlock_t cache_lock;
	wait_queue_head_t cache_wait;
	struct btrfs_free_space_ctl *free_ino_pinned;
	u64 cache_progress;
1506
	struct inode *cache_inode;
1507

1508
	struct mutex log_mutex;
Y
Yan Zheng 已提交
1509 1510 1511 1512
	wait_queue_head_t log_writer_wait;
	wait_queue_head_t log_commit_wait[2];
	atomic_t log_writers;
	atomic_t log_commit[2];
M
Miao Xie 已提交
1513
	atomic_t log_batch;
Y
Yan Zheng 已提交
1514
	unsigned long log_transid;
1515
	unsigned long last_log_commit;
1516 1517
	pid_t log_start_pid;
	bool log_multiple_pids;
1518

1519 1520
	u64 objectid;
	u64 last_trans;
1521 1522 1523 1524 1525 1526 1527 1528 1529 1530

	/* data allocations are done in sectorsize units */
	u32 sectorsize;

	/* node allocations are done in nodesize units */
	u32 nodesize;

	/* leaf allocations are done in leafsize units */
	u32 leafsize;

1531 1532
	u32 stripesize;

1533
	u32 type;
1534 1535

	u64 highest_objectid;
C
Chris Mason 已提交
1536 1537 1538 1539 1540 1541 1542 1543

	/* btrfs_record_root_in_trans is a multi-step process,
	 * and it can race with the balancing code.   But the
	 * race is very small, and only the first time the root
	 * is added to each transaction.  So in_trans_setup
	 * is used to tell us when more checks are required
	 */
	unsigned long in_trans_setup;
1544
	int ref_cows;
1545
	int track_dirty;
1546 1547
	int in_radix;

1548
	u64 defrag_trans_start;
1549
	struct btrfs_key defrag_progress;
C
Chris Mason 已提交
1550
	struct btrfs_key defrag_max;
1551
	int defrag_running;
1552
	char *name;
1553 1554 1555

	/* the dirty list is only used by non-reference counted roots */
	struct list_head dirty_list;
1556

1557 1558
	struct list_head root_list;

1559
	spinlock_t orphan_lock;
1560
	atomic_t orphan_inodes;
1561 1562 1563
	struct btrfs_block_rsv *orphan_block_rsv;
	int orphan_item_inserted;
	int orphan_cleanup_state;
1564

1565 1566 1567 1568
	spinlock_t inode_lock;
	/* red-black tree that keeps track of in-memory inodes */
	struct rb_root inode_tree;

1569 1570 1571 1572 1573
	/*
	 * radix tree that keeps track of delayed nodes of every inode,
	 * protected by inode_lock
	 */
	struct radix_tree_root delayed_nodes_tree;
1574 1575 1576 1577
	/*
	 * right now this just gets used so that a root has its own devid
	 * for stat.  It may be used for more later
	 */
1578
	dev_t anon_dev;
1579 1580

	int force_cow;
1581 1582

	spinlock_t root_times_lock;
1583 1584
};

C
Chris Mason 已提交
1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616
struct btrfs_ioctl_defrag_range_args {
	/* start of the defrag operation */
	__u64 start;

	/* number of bytes to defrag, use (u64)-1 to say all */
	__u64 len;

	/*
	 * flags for the operation, which can include turning
	 * on compression for this one defrag
	 */
	__u64 flags;

	/*
	 * any extent bigger than this will be considered
	 * already defragged.  Use 0 to take the kernel default
	 * Use 1 to say every single extent must be rewritten
	 */
	__u32 extent_thresh;

	/*
	 * which compression method to use if turning on compression
	 * for this defrag operation.  If unspecified, zlib will
	 * be used
	 */
	__u32 compress_type;

	/* spare for later */
	__u32 unused[4];
};


C
Chris Mason 已提交
1617 1618 1619 1620 1621
/*
 * inode items have the data typically returned from stat and store other
 * info about object characteristics.  There is one for every file and dir in
 * the FS
 */
C
Chris Mason 已提交
1622
#define BTRFS_INODE_ITEM_KEY		1
1623
#define BTRFS_INODE_REF_KEY		12
M
Mark Fasheh 已提交
1624
#define BTRFS_INODE_EXTREF_KEY		13
1625 1626
#define BTRFS_XATTR_ITEM_KEY		24
#define BTRFS_ORPHAN_ITEM_KEY		48
C
Chris Mason 已提交
1627
/* reserve 2-15 close to the inode for later flexibility */
C
Chris Mason 已提交
1628 1629 1630 1631 1632

/*
 * dir items are the name -> inode pointers in a directory.  There is one
 * for every name in a directory.
 */
1633 1634 1635 1636
#define BTRFS_DIR_LOG_ITEM_KEY  60
#define BTRFS_DIR_LOG_INDEX_KEY 72
#define BTRFS_DIR_ITEM_KEY	84
#define BTRFS_DIR_INDEX_KEY	96
C
Chris Mason 已提交
1637
/*
C
Chris Mason 已提交
1638
 * extent data is for file data
C
Chris Mason 已提交
1639
 */
1640
#define BTRFS_EXTENT_DATA_KEY	108
1641

C
Chris Mason 已提交
1642
/*
1643 1644
 * extent csums are stored in a separate tree and hold csums for
 * an entire extent on disk.
C
Chris Mason 已提交
1645
 */
1646
#define BTRFS_EXTENT_CSUM_KEY	128
C
Chris Mason 已提交
1647

C
Chris Mason 已提交
1648
/*
W
Wu Fengguang 已提交
1649
 * root items point to tree roots.  They are typically in the root
C
Chris Mason 已提交
1650 1651
 * tree used by the super block to find all the other trees
 */
1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666
#define BTRFS_ROOT_ITEM_KEY	132

/*
 * root backrefs tie subvols and snapshots to the directory entries that
 * reference them
 */
#define BTRFS_ROOT_BACKREF_KEY	144

/*
 * root refs make a fast index for listing all of the snapshots and
 * subvolumes referenced by a given root.  They point directly to the
 * directory item in the root that references the subvol
 */
#define BTRFS_ROOT_REF_KEY	156

C
Chris Mason 已提交
1667 1668 1669 1670
/*
 * extent items are in the extent map tree.  These record which blocks
 * are used, and how many references there are to each block
 */
1671
#define BTRFS_EXTENT_ITEM_KEY	168
1672 1673 1674 1675 1676 1677 1678 1679 1680 1681

#define BTRFS_TREE_BLOCK_REF_KEY	176

#define BTRFS_EXTENT_DATA_REF_KEY	178

#define BTRFS_EXTENT_REF_V0_KEY		180

#define BTRFS_SHARED_BLOCK_REF_KEY	182

#define BTRFS_SHARED_DATA_REF_KEY	184
C
Chris Mason 已提交
1682 1683 1684 1685 1686

/*
 * block groups give us hints into the extent allocation trees.  Which
 * blocks are free etc etc
 */
1687
#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1688

1689 1690 1691
#define BTRFS_DEV_EXTENT_KEY	204
#define BTRFS_DEV_ITEM_KEY	216
#define BTRFS_CHUNK_ITEM_KEY	228
1692

A
Arne Jansen 已提交
1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716
/*
 * Records the overall state of the qgroups.
 * There's only one instance of this key present,
 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
 */
#define BTRFS_QGROUP_STATUS_KEY         240
/*
 * Records the currently used space of the qgroup.
 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
 */
#define BTRFS_QGROUP_INFO_KEY           242
/*
 * Contains the user configured limits for the qgroup.
 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
 */
#define BTRFS_QGROUP_LIMIT_KEY          244
/*
 * Records the child-parent relationship of qgroups. For
 * each relation, 2 keys are present:
 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
 */
#define BTRFS_QGROUP_RELATION_KEY       246

1717 1718
#define BTRFS_BALANCE_ITEM_KEY	248

1719 1720 1721 1722 1723 1724
/*
 * Persistantly stores the io stats in the device tree.
 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
 */
#define BTRFS_DEV_STATS_KEY	249

C
Chris Mason 已提交
1725 1726 1727 1728
/*
 * string items are for debugging.  They just store a short string of
 * data in the FS
 */
C
Chris Mason 已提交
1729 1730
#define BTRFS_STRING_ITEM_KEY	253

1731 1732 1733 1734 1735
/*
 * Flags for mount options.
 *
 * Note: don't forget to add new options to btrfs_show_options()
 */
1736 1737 1738
#define BTRFS_MOUNT_NODATASUM		(1 << 0)
#define BTRFS_MOUNT_NODATACOW		(1 << 1)
#define BTRFS_MOUNT_NOBARRIER		(1 << 2)
1739
#define BTRFS_MOUNT_SSD			(1 << 3)
1740
#define BTRFS_MOUNT_DEGRADED		(1 << 4)
C
Chris Mason 已提交
1741
#define BTRFS_MOUNT_COMPRESS		(1 << 5)
S
Sage Weil 已提交
1742
#define BTRFS_MOUNT_NOTREELOG           (1 << 6)
1743
#define BTRFS_MOUNT_FLUSHONCOMMIT       (1 << 7)
1744
#define BTRFS_MOUNT_SSD_SPREAD		(1 << 8)
C
Chris Mason 已提交
1745
#define BTRFS_MOUNT_NOSSD		(1 << 9)
C
Christoph Hellwig 已提交
1746
#define BTRFS_MOUNT_DISCARD		(1 << 10)
C
Chris Mason 已提交
1747
#define BTRFS_MOUNT_FORCE_COMPRESS      (1 << 11)
1748
#define BTRFS_MOUNT_SPACE_CACHE		(1 << 12)
1749
#define BTRFS_MOUNT_CLEAR_CACHE		(1 << 13)
1750
#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1751
#define BTRFS_MOUNT_ENOSPC_DEBUG	 (1 << 15)
C
Chris Mason 已提交
1752
#define BTRFS_MOUNT_AUTO_DEFRAG		(1 << 16)
C
Chris Mason 已提交
1753
#define BTRFS_MOUNT_INODE_MAP_CACHE	(1 << 17)
C
Chris Mason 已提交
1754
#define BTRFS_MOUNT_RECOVERY		(1 << 18)
1755
#define BTRFS_MOUNT_SKIP_BALANCE	(1 << 19)
1756 1757
#define BTRFS_MOUNT_CHECK_INTEGRITY	(1 << 20)
#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
J
Jeff Mahoney 已提交
1758
#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR	(1 << 22)
1759 1760 1761 1762 1763

#define btrfs_clear_opt(o, opt)		((o) &= ~BTRFS_MOUNT_##opt)
#define btrfs_set_opt(o, opt)		((o) |= BTRFS_MOUNT_##opt)
#define btrfs_test_opt(root, opt)	((root)->fs_info->mount_opt & \
					 BTRFS_MOUNT_##opt)
Y
Yan 已提交
1764 1765 1766
/*
 * Inode flags
 */
Y
Yan 已提交
1767 1768 1769
#define BTRFS_INODE_NODATASUM		(1 << 0)
#define BTRFS_INODE_NODATACOW		(1 << 1)
#define BTRFS_INODE_READONLY		(1 << 2)
C
Chris Mason 已提交
1770
#define BTRFS_INODE_NOCOMPRESS		(1 << 3)
Y
Yan Zheng 已提交
1771
#define BTRFS_INODE_PREALLOC		(1 << 4)
1772 1773 1774 1775 1776 1777
#define BTRFS_INODE_SYNC		(1 << 5)
#define BTRFS_INODE_IMMUTABLE		(1 << 6)
#define BTRFS_INODE_APPEND		(1 << 7)
#define BTRFS_INODE_NODUMP		(1 << 8)
#define BTRFS_INODE_NOATIME		(1 << 9)
#define BTRFS_INODE_DIRSYNC		(1 << 10)
1778
#define BTRFS_INODE_COMPRESS		(1 << 11)
1779

1780 1781
#define BTRFS_INODE_ROOT_ITEM_INIT	(1 << 31)

1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792
struct btrfs_map_token {
	struct extent_buffer *eb;
	char *kaddr;
	unsigned long offset;
};

static inline void btrfs_init_map_token (struct btrfs_map_token *token)
{
	memset(token, 0, sizeof(*token));
}

1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812
/* some macros to generate set/get funcs for the struct fields.  This
 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
 * one for u8:
 */
#define le8_to_cpu(v) (v)
#define cpu_to_le8(v) (v)
#define __le8 u8

#define read_eb_member(eb, ptr, type, member, result) (			\
	read_extent_buffer(eb, (char *)(result),			\
			   ((unsigned long)(ptr)) +			\
			    offsetof(type, member),			\
			   sizeof(((type *)0)->member)))

#define write_eb_member(eb, ptr, type, member, result) (		\
	write_extent_buffer(eb, (char *)(result),			\
			   ((unsigned long)(ptr)) +			\
			    offsetof(type, member),			\
			   sizeof(((type *)0)->member)))

L
Li Zefan 已提交
1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835
#define DECLARE_BTRFS_SETGET_BITS(bits)					\
u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr,	\
			       unsigned long off,			\
                              struct btrfs_map_token *token);		\
void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr,	\
			    unsigned long off, u##bits val,		\
			    struct btrfs_map_token *token);		\
static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
				       unsigned long off)		\
{									\
	return btrfs_get_token_##bits(eb, ptr, off, NULL);		\
}									\
static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
				    unsigned long off, u##bits val)	\
{									\
       btrfs_set_token_##bits(eb, ptr, off, val, NULL);			\
}

DECLARE_BTRFS_SETGET_BITS(8)
DECLARE_BTRFS_SETGET_BITS(16)
DECLARE_BTRFS_SETGET_BITS(32)
DECLARE_BTRFS_SETGET_BITS(64)

1836
#define BTRFS_SETGET_FUNCS(name, type, member, bits)			\
L
Li Zefan 已提交
1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860
static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s)	\
{									\
	BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member);	\
	return btrfs_get_##bits(eb, s, offsetof(type, member));		\
}									\
static inline void btrfs_set_##name(struct extent_buffer *eb, type *s,	\
				    u##bits val)			\
{									\
	BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member);	\
	btrfs_set_##bits(eb, s, offsetof(type, member), val);		\
}									\
static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
					 struct btrfs_map_token *token)	\
{									\
	BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member);	\
	return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
}									\
static inline void btrfs_set_token_##name(struct extent_buffer *eb,	\
					  type *s, u##bits val,		\
                                         struct btrfs_map_token *token)	\
{									\
	BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member);	\
	btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
}
1861 1862 1863 1864

#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits)		\
static inline u##bits btrfs_##name(struct extent_buffer *eb)		\
{									\
1865
	type *p = page_address(eb->pages[0]);				\
D
David Miller 已提交
1866
	u##bits res = le##bits##_to_cpu(p->member);			\
1867
	return res;							\
1868 1869 1870 1871
}									\
static inline void btrfs_set_##name(struct extent_buffer *eb,		\
				    u##bits val)			\
{									\
1872
	type *p = page_address(eb->pages[0]);				\
D
David Miller 已提交
1873
	p->member = cpu_to_le##bits(val);				\
1874
}
C
Chris Mason 已提交
1875

1876 1877 1878 1879 1880 1881 1882 1883
#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits)		\
static inline u##bits btrfs_##name(type *s)				\
{									\
	return le##bits##_to_cpu(s->member);				\
}									\
static inline void btrfs_set_##name(type *s, u##bits val)		\
{									\
	s->member = cpu_to_le##bits(val);				\
C
Chris Mason 已提交
1884 1885
}

1886 1887 1888 1889 1890
BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1891 1892
BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
		   start_offset, 64);
1893 1894
BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1895 1896 1897
BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
Y
Yan Zheng 已提交
1898
BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1899

1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911
BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
			 total_bytes, 64);
BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
			 bytes_used, 64);
BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
			 io_align, 32);
BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
			 io_width, 32);
BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
			 sector_size, 32);
BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1912 1913 1914 1915 1916 1917
BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
			 dev_group, 32);
BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
			 seek_speed, 8);
BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
			 bandwidth, 8);
Y
Yan Zheng 已提交
1918 1919
BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
			 generation, 64);
1920

1921 1922 1923 1924 1925
static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
{
	return (char *)d + offsetof(struct btrfs_dev_item, uuid);
}

Y
Yan Zheng 已提交
1926 1927 1928 1929 1930
static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
{
	return (char *)d + offsetof(struct btrfs_dev_item, fsid);
}

1931
BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1932 1933 1934 1935 1936 1937 1938
BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
C
Chris Mason 已提交
1939
BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1940 1941 1942
BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);

1943 1944 1945 1946 1947 1948
static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
{
	return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
}

BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960
BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
			 stripe_len, 64);
BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
			 io_align, 32);
BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
			 io_width, 32);
BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
			 sector_size, 32);
BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
			 num_stripes, 16);
C
Chris Mason 已提交
1961 1962
BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
			 sub_stripes, 16);
1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974
BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);

static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
						   int nr)
{
	unsigned long offset = (unsigned long)c;
	offset += offsetof(struct btrfs_chunk, stripe);
	offset += nr * sizeof(struct btrfs_stripe);
	return (struct btrfs_stripe *)offset;
}

1975 1976 1977 1978 1979
static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
{
	return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
}

1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991
static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
					 struct btrfs_chunk *c, int nr)
{
	return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
}

static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
					 struct btrfs_chunk *c, int nr)
{
	return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
}

1992 1993 1994 1995 1996
/* struct btrfs_block_group_item */
BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
			 used, 64);
BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
			 used, 64);
1997 1998
BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
			struct btrfs_block_group_item, chunk_objectid, 64);
1999 2000

BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2001 2002 2003 2004 2005
		   struct btrfs_block_group_item, chunk_objectid, 64);
BTRFS_SETGET_FUNCS(disk_block_group_flags,
		   struct btrfs_block_group_item, flags, 64);
BTRFS_SETGET_STACK_FUNCS(block_group_flags,
			struct btrfs_block_group_item, flags, 64);
C
Chris Mason 已提交
2006

2007 2008
/* struct btrfs_inode_ref */
BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2009
BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2010

M
Mark Fasheh 已提交
2011 2012 2013 2014 2015 2016 2017
/* struct btrfs_inode_extref */
BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
		   parent_objectid, 64);
BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
		   name_len, 16);
BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);

2018 2019
/* struct btrfs_inode_item */
BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2020
BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2021
BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2022
BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2023
BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2024 2025 2026 2027 2028
BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2029
BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2030
BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
C
Chris Mason 已提交
2031

2032
static inline struct btrfs_timespec *
2033
btrfs_inode_atime(struct btrfs_inode_item *inode_item)
C
Chris Mason 已提交
2034
{
2035 2036
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, atime);
2037
	return (struct btrfs_timespec *)ptr;
C
Chris Mason 已提交
2038 2039
}

2040
static inline struct btrfs_timespec *
2041
btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
C
Chris Mason 已提交
2042
{
2043 2044
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, mtime);
2045
	return (struct btrfs_timespec *)ptr;
C
Chris Mason 已提交
2046 2047
}

2048
static inline struct btrfs_timespec *
2049
btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
C
Chris Mason 已提交
2050
{
2051 2052
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, ctime);
2053
	return (struct btrfs_timespec *)ptr;
C
Chris Mason 已提交
2054 2055
}

2056 2057
BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
C
Chris Mason 已提交
2058

2059
/* struct btrfs_dev_extent */
2060 2061 2062 2063 2064 2065
BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
		   chunk_tree, 64);
BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
		   chunk_objectid, 64);
BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
		   chunk_offset, 64);
2066 2067
BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);

2068 2069 2070 2071 2072 2073
static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
{
	unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
	return (u8 *)((unsigned long)dev + ptr);
}

2074 2075 2076 2077
BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
		   generation, 64);
BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2078

2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096
BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);


BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);

static inline void btrfs_tree_block_key(struct extent_buffer *eb,
					struct btrfs_tree_block_info *item,
					struct btrfs_disk_key *key)
{
	read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
}

static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
					    struct btrfs_tree_block_info *item,
					    struct btrfs_disk_key *key)
{
	write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
}
C
Chris Mason 已提交
2097

2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134
BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
		   root, 64);
BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
		   objectid, 64);
BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
		   offset, 64);
BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
		   count, 32);

BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
		   count, 32);

BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
		   type, 8);
BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
		   offset, 64);

static inline u32 btrfs_extent_inline_ref_size(int type)
{
	if (type == BTRFS_TREE_BLOCK_REF_KEY ||
	    type == BTRFS_SHARED_BLOCK_REF_KEY)
		return sizeof(struct btrfs_extent_inline_ref);
	if (type == BTRFS_SHARED_DATA_REF_KEY)
		return sizeof(struct btrfs_shared_data_ref) +
		       sizeof(struct btrfs_extent_inline_ref);
	if (type == BTRFS_EXTENT_DATA_REF_KEY)
		return sizeof(struct btrfs_extent_data_ref) +
		       offsetof(struct btrfs_extent_inline_ref, offset);
	BUG();
	return 0;
}

BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
		   generation, 64);
BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
C
Chris Mason 已提交
2135

2136 2137
/* struct btrfs_node */
BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2138
BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
C
Chris Mason 已提交
2139

2140
static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
2141
{
2142 2143 2144 2145
	unsigned long ptr;
	ptr = offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
	return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
C
Chris Mason 已提交
2146 2147
}

2148 2149
static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
					   int nr, u64 val)
C
Chris Mason 已提交
2150
{
2151 2152 2153 2154
	unsigned long ptr;
	ptr = offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
	btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
C
Chris Mason 已提交
2155 2156
}

2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173
static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
{
	unsigned long ptr;
	ptr = offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
	return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
}

static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
						 int nr, u64 val)
{
	unsigned long ptr;
	ptr = offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
	btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
}

2174
static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2175
{
2176 2177
	return offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
2178 2179
}

2180 2181 2182
void btrfs_node_key(struct extent_buffer *eb,
		    struct btrfs_disk_key *disk_key, int nr);

2183 2184
static inline void btrfs_set_node_key(struct extent_buffer *eb,
				      struct btrfs_disk_key *disk_key, int nr)
2185
{
2186 2187 2188 2189
	unsigned long ptr;
	ptr = btrfs_node_key_ptr_offset(nr);
	write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
		       struct btrfs_key_ptr, key, disk_key);
2190 2191
}

2192 2193 2194
/* struct btrfs_item */
BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2195

2196
static inline unsigned long btrfs_item_nr_offset(int nr)
2197
{
2198 2199
	return offsetof(struct btrfs_leaf, items) +
		sizeof(struct btrfs_item) * nr;
2200 2201
}

2202 2203
static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
					       int nr)
C
Chris Mason 已提交
2204
{
2205
	return (struct btrfs_item *)btrfs_item_nr_offset(nr);
C
Chris Mason 已提交
2206 2207
}

2208 2209
static inline u32 btrfs_item_end(struct extent_buffer *eb,
				 struct btrfs_item *item)
C
Chris Mason 已提交
2210
{
2211
	return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
C
Chris Mason 已提交
2212 2213
}

2214
static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
2215
{
2216
	return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
C
Chris Mason 已提交
2217 2218
}

2219
static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
2220
{
2221
	return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
C
Chris Mason 已提交
2222 2223
}

2224
static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
2225
{
2226
	return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
C
Chris Mason 已提交
2227 2228
}

2229 2230
static inline void btrfs_item_key(struct extent_buffer *eb,
			   struct btrfs_disk_key *disk_key, int nr)
2231
{
2232 2233
	struct btrfs_item *item = btrfs_item_nr(eb, nr);
	read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2234 2235
}

2236 2237
static inline void btrfs_set_item_key(struct extent_buffer *eb,
			       struct btrfs_disk_key *disk_key, int nr)
2238
{
2239 2240
	struct btrfs_item *item = btrfs_item_nr(eb, nr);
	write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2241 2242
}

2243 2244
BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);

2245 2246 2247 2248 2249 2250 2251
/*
 * struct btrfs_root_ref
 */
BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);

2252
/* struct btrfs_dir_item */
J
Josef Bacik 已提交
2253
BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2254 2255
BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2256
BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2257

2258 2259 2260
static inline void btrfs_dir_item_key(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_disk_key *key)
2261
{
2262
	read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2263 2264
}

2265 2266 2267
static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
					  struct btrfs_dir_item *item,
					  struct btrfs_disk_key *key)
2268
{
2269
	write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2270 2271
}

2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292
BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
		   num_entries, 64);
BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
		   num_bitmaps, 64);
BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
		   generation, 64);

static inline void btrfs_free_space_key(struct extent_buffer *eb,
					struct btrfs_free_space_header *h,
					struct btrfs_disk_key *key)
{
	read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
}

static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
					    struct btrfs_free_space_header *h,
					    struct btrfs_disk_key *key)
{
	write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
}

2293 2294 2295 2296 2297
/* struct btrfs_disk_key */
BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
			 objectid, 64);
BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2298

C
Chris Mason 已提交
2299 2300 2301 2302
static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
					 struct btrfs_disk_key *disk)
{
	cpu->offset = le64_to_cpu(disk->offset);
2303
	cpu->type = disk->type;
C
Chris Mason 已提交
2304 2305 2306 2307 2308 2309 2310
	cpu->objectid = le64_to_cpu(disk->objectid);
}

static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
					 struct btrfs_key *cpu)
{
	disk->offset = cpu_to_le64(cpu->offset);
2311
	disk->type = cpu->type;
C
Chris Mason 已提交
2312 2313 2314
	disk->objectid = cpu_to_le64(cpu->objectid);
}

2315 2316
static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
2317
{
2318 2319 2320
	struct btrfs_disk_key disk_key;
	btrfs_node_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
2321 2322
}

2323 2324
static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
2325
{
2326 2327 2328
	struct btrfs_disk_key disk_key;
	btrfs_item_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
2329 2330
}

2331 2332 2333
static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_key *key)
2334
{
2335 2336 2337
	struct btrfs_disk_key disk_key;
	btrfs_dir_item_key(eb, item, &disk_key);
	btrfs_disk_key_to_cpu(key, &disk_key);
2338 2339
}

2340

2341
static inline u8 btrfs_key_type(struct btrfs_key *key)
2342
{
2343
	return key->type;
2344 2345
}

2346
static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2347
{
2348
	key->type = val;
2349 2350
}

2351
/* struct btrfs_header */
2352
BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2353 2354 2355 2356
BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
			  generation, 64);
BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2357
BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2358
BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2359

2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378
static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
{
	return (btrfs_header_flags(eb) & flag) == flag;
}

static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
{
	u64 flags = btrfs_header_flags(eb);
	btrfs_set_header_flags(eb, flags | flag);
	return (flags & flag) == flag;
}

static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
{
	u64 flags = btrfs_header_flags(eb);
	btrfs_set_header_flags(eb, flags & ~flag);
	return (flags & flag) == flag;
}

2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393
static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
{
	u64 flags = btrfs_header_flags(eb);
	return flags >> BTRFS_BACKREF_REV_SHIFT;
}

static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
						int rev)
{
	u64 flags = btrfs_header_flags(eb);
	flags &= ~BTRFS_BACKREF_REV_MASK;
	flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
	btrfs_set_header_flags(eb, flags);
}

2394
static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
2395
{
2396 2397
	unsigned long ptr = offsetof(struct btrfs_header, fsid);
	return (u8 *)ptr;
2398 2399
}

2400 2401 2402 2403 2404 2405
static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
{
	unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
	return (u8 *)ptr;
}

2406
static inline int btrfs_is_leaf(struct extent_buffer *eb)
2407
{
C
Chris Mason 已提交
2408
	return btrfs_header_level(eb) == 0;
2409 2410
}

2411
/* struct btrfs_root_item */
2412 2413
BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
		   generation, 64);
2414
BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2415 2416
BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2417

2418 2419
BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
			 generation, 64);
2420 2421
BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2422 2423
BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2424
BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2425 2426
BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
Y
Yan Zheng 已提交
2427 2428
BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
			 last_snapshot, 64);
2429 2430 2431 2432 2433 2434 2435 2436 2437 2438
BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
			 generation_v2, 64);
BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
			 ctransid, 64);
BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
			 otransid, 64);
BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
			 stransid, 64);
BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
			 rtransid, 64);
C
Chris Mason 已提交
2439

L
Li Zefan 已提交
2440 2441
static inline bool btrfs_root_readonly(struct btrfs_root *root)
{
2442
	return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
L
Li Zefan 已提交
2443 2444
}

C
Chris Mason 已提交
2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493
/* struct btrfs_root_backup */
BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
		   tree_root, 64);
BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
		   tree_root_gen, 64);
BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
		   tree_root_level, 8);

BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
		   chunk_root, 64);
BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
		   chunk_root_gen, 64);
BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
		   chunk_root_level, 8);

BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
		   extent_root, 64);
BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
		   extent_root_gen, 64);
BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
		   extent_root_level, 8);

BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
		   fs_root, 64);
BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
		   fs_root_gen, 64);
BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
		   fs_root_level, 8);

BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
		   dev_root, 64);
BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
		   dev_root_gen, 64);
BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
		   dev_root_level, 8);

BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
		   csum_root, 64);
BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
		   csum_root_gen, 64);
BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
		   csum_root_level, 8);
BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
		   total_bytes, 64);
BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
		   bytes_used, 64);
BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
		   num_devices, 64);

2494 2495
/* struct btrfs_balance_item */
BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2496

2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573
static inline void btrfs_balance_data(struct extent_buffer *eb,
				      struct btrfs_balance_item *bi,
				      struct btrfs_disk_balance_args *ba)
{
	read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
}

static inline void btrfs_set_balance_data(struct extent_buffer *eb,
					  struct btrfs_balance_item *bi,
					  struct btrfs_disk_balance_args *ba)
{
	write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
}

static inline void btrfs_balance_meta(struct extent_buffer *eb,
				      struct btrfs_balance_item *bi,
				      struct btrfs_disk_balance_args *ba)
{
	read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
}

static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
					  struct btrfs_balance_item *bi,
					  struct btrfs_disk_balance_args *ba)
{
	write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
}

static inline void btrfs_balance_sys(struct extent_buffer *eb,
				     struct btrfs_balance_item *bi,
				     struct btrfs_disk_balance_args *ba)
{
	read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
}

static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
					 struct btrfs_balance_item *bi,
					 struct btrfs_disk_balance_args *ba)
{
	write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
}

static inline void
btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
			       struct btrfs_disk_balance_args *disk)
{
	memset(cpu, 0, sizeof(*cpu));

	cpu->profiles = le64_to_cpu(disk->profiles);
	cpu->usage = le64_to_cpu(disk->usage);
	cpu->devid = le64_to_cpu(disk->devid);
	cpu->pstart = le64_to_cpu(disk->pstart);
	cpu->pend = le64_to_cpu(disk->pend);
	cpu->vstart = le64_to_cpu(disk->vstart);
	cpu->vend = le64_to_cpu(disk->vend);
	cpu->target = le64_to_cpu(disk->target);
	cpu->flags = le64_to_cpu(disk->flags);
}

static inline void
btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
			       struct btrfs_balance_args *cpu)
{
	memset(disk, 0, sizeof(*disk));

	disk->profiles = cpu_to_le64(cpu->profiles);
	disk->usage = cpu_to_le64(cpu->usage);
	disk->devid = cpu_to_le64(cpu->devid);
	disk->pstart = cpu_to_le64(cpu->pstart);
	disk->pend = cpu_to_le64(cpu->pend);
	disk->vstart = cpu_to_le64(cpu->vstart);
	disk->vend = cpu_to_le64(cpu->vend);
	disk->target = cpu_to_le64(cpu->target);
	disk->flags = cpu_to_le64(cpu->flags);
}

/* struct btrfs_super_block */
2574
BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2575
BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2576 2577 2578
BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
			 generation, 64);
BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2579 2580
BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
			 struct btrfs_super_block, sys_chunk_array_size, 32);
2581 2582
BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
			 struct btrfs_super_block, chunk_root_generation, 64);
2583 2584
BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
			 root_level, 8);
2585 2586 2587
BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
			 chunk_root, 64);
BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2588 2589 2590
			 chunk_root_level, 8);
BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
			 log_root, 64);
2591 2592
BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
			 log_root_transid, 64);
2593 2594
BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
			 log_root_level, 8);
2595 2596 2597 2598
BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
			 total_bytes, 64);
BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
			 bytes_used, 64);
2599 2600 2601 2602 2603 2604
BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
			 sectorsize, 32);
BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
			 nodesize, 32);
BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
			 leafsize, 32);
2605 2606
BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
			 stripesize, 32);
2607 2608
BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
			 root_dir_objectid, 64);
2609 2610
BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
			 num_devices, 64);
2611 2612 2613
BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
			 compat_flags, 64);
BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2614
			 compat_ro_flags, 64);
2615 2616
BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
			 incompat_flags, 64);
2617 2618
BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
			 csum_type, 16);
2619 2620
BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
			 cache_generation, 64);
2621 2622 2623 2624 2625 2626 2627

static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
{
	int t = btrfs_super_csum_type(s);
	BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
	return btrfs_csum_sizes[t];
}
2628

2629
static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2630
{
2631
	return offsetof(struct btrfs_leaf, items);
2632 2633
}

2634 2635
/* struct btrfs_file_extent_item */
BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2636

C
Chris Mason 已提交
2637 2638
static inline unsigned long
btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2639
{
2640
	unsigned long offset = (unsigned long)e;
2641
	offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2642
	return offset;
2643 2644 2645 2646
}

static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
{
2647
	return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2648 2649
}

2650 2651
BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
		   disk_bytenr, 64);
2652 2653
BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
		   generation, 64);
2654 2655
BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
		   disk_num_bytes, 64);
2656 2657
BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
		  offset, 64);
2658 2659
BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
		   num_bytes, 64);
C
Chris Mason 已提交
2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689
BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
		   ram_bytes, 64);
BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
		   compression, 8);
BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
		   encryption, 8);
BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
		   other_encoding, 16);

/* this returns the number of file bytes represented by the inline item.
 * If an item is compressed, this is the uncompressed size
 */
static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
					       struct btrfs_file_extent_item *e)
{
	return btrfs_file_extent_ram_bytes(eb, e);
}

/*
 * this returns the number of bytes used by the item on disk, minus the
 * size of any extent headers.  If a file is compressed on disk, this is
 * the compressed size
 */
static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
						    struct btrfs_item *e)
{
	unsigned long offset;
	offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
	return btrfs_item_size(eb, e) - offset;
}
2690

2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714
/* btrfs_dev_stats_item */
static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
					struct btrfs_dev_stats_item *ptr,
					int index)
{
	u64 val;

	read_extent_buffer(eb, &val,
			   offsetof(struct btrfs_dev_stats_item, values) +
			    ((unsigned long)ptr) + (index * sizeof(u64)),
			   sizeof(val));
	return val;
}

static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
					     struct btrfs_dev_stats_item *ptr,
					     int index, u64 val)
{
	write_extent_buffer(eb, &val,
			    offsetof(struct btrfs_dev_stats_item, values) +
			     ((unsigned long)ptr) + (index * sizeof(u64)),
			    sizeof(val));
}

A
Arne Jansen 已提交
2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757
/* btrfs_qgroup_status_item */
BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
		   generation, 64);
BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
		   version, 64);
BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
		   flags, 64);
BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
		   scan, 64);

/* btrfs_qgroup_info_item */
BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
		   generation, 64);
BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
		   rfer_cmpr, 64);
BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
		   excl_cmpr, 64);

BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
			 struct btrfs_qgroup_info_item, generation, 64);
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
			 rfer, 64);
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
			 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
			 excl, 64);
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
			 struct btrfs_qgroup_info_item, excl_cmpr, 64);

/* btrfs_qgroup_limit_item */
BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
		   flags, 64);
BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
		   max_rfer, 64);
BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
		   max_excl, 64);
BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
		   rsv_rfer, 64);
BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
		   rsv_excl, 64);

2758
static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
C
Chris Mason 已提交
2759 2760 2761 2762
{
	return sb->s_fs_info;
}

C
Chris Mason 已提交
2763 2764
static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
{
2765 2766 2767 2768 2769
	if (level == 0)
		return root->leafsize;
	return root->nodesize;
}

2770 2771
/* helper function to cast into the data area of the leaf. */
#define btrfs_item_ptr(leaf, slot, type) \
C
Chris Mason 已提交
2772
	((type *)(btrfs_leaf_data(leaf) + \
2773 2774 2775 2776 2777
	btrfs_item_offset_nr(leaf, slot)))

#define btrfs_item_ptr_offset(leaf, slot) \
	((unsigned long)(btrfs_leaf_data(leaf) + \
	btrfs_item_offset_nr(leaf, slot)))
2778

2779 2780
static inline struct dentry *fdentry(struct file *file)
{
2781 2782 2783
	return file->f_path.dentry;
}

2784 2785 2786 2787 2788 2789
static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
{
	return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
		(space_info->flags & BTRFS_BLOCK_GROUP_DATA));
}

2790 2791 2792 2793 2794
static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
{
	return mapping_gfp_mask(mapping) & ~__GFP_FS;
}

C
Chris Mason 已提交
2795
/* extent-tree.c */
2796
static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2797
						 unsigned num_items)
2798 2799 2800
{
	return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
		3 * num_items;
2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811
}

/*
 * Doing a truncate won't result in new nodes or leaves, just what we need for
 * COW.
 */
static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
						 unsigned num_items)
{
	return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
		num_items;
2812 2813
}

2814
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2815 2816
int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, unsigned long count);
Z
Zheng Yan 已提交
2817
int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2818 2819 2820
int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root, u64 bytenr,
			     u64 num_bytes, u64 *refs, u64 *flags);
2821 2822
int btrfs_pin_extent(struct btrfs_root *root,
		     u64 bytenr, u64 num, int reserved);
2823 2824 2825
int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
				    struct btrfs_root *root,
				    u64 bytenr, u64 num_bytes);
Y
Yan Zheng 已提交
2826
int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2827 2828
			  struct btrfs_root *root,
			  u64 objectid, u64 offset, u64 bytenr);
C
Chris Mason 已提交
2829 2830 2831
struct btrfs_block_group_cache *btrfs_lookup_block_group(
						 struct btrfs_fs_info *info,
						 u64 bytenr);
2832
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2833 2834
u64 btrfs_find_block_group(struct btrfs_root *root,
			   u64 search_start, u64 search_hint, int owner);
2835
struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2836 2837 2838
					struct btrfs_root *root, u32 blocksize,
					u64 parent, u64 root_objectid,
					struct btrfs_disk_key *key, int level,
2839
					u64 hint, u64 empty_size);
2840 2841 2842
void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   struct extent_buffer *buf,
2843
			   u64 parent, int last_ref);
2844 2845
struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
					    struct btrfs_root *root,
2846 2847
					    u64 bytenr, u32 blocksize,
					    int level);
2848 2849 2850 2851 2852 2853 2854 2855
int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
				     struct btrfs_root *root,
				     u64 root_objectid, u64 owner,
				     u64 offset, struct btrfs_key *ins);
int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
				   struct btrfs_root *root,
				   u64 root_objectid, u64 owner, u64 offset,
				   struct btrfs_key *ins);
2856 2857 2858 2859
int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
				  struct btrfs_root *root,
				  u64 num_bytes, u64 min_alloc_size,
				  u64 empty_size, u64 hint_byte,
2860
				  struct btrfs_key *ins, u64 data);
2861
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
A
Arne Jansen 已提交
2862
		  struct extent_buffer *buf, int full_backref, int for_cow);
2863
int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
A
Arne Jansen 已提交
2864
		  struct extent_buffer *buf, int full_backref, int for_cow);
2865 2866 2867 2868
int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
				struct btrfs_root *root,
				u64 bytenr, u64 num_bytes, u64 flags,
				int is_data);
Z
Zheng Yan 已提交
2869 2870
int btrfs_free_extent(struct btrfs_trans_handle *trans,
		      struct btrfs_root *root,
A
Arne Jansen 已提交
2871 2872
		      u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
		      u64 owner, u64 offset, int for_cow);
2873

2874
int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2875 2876
int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
				       u64 start, u64 len);
2877 2878
void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
				 struct btrfs_root *root);
C
Chris Mason 已提交
2879
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2880
			       struct btrfs_root *root);
C
Chris Mason 已提交
2881
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
Z
Zheng Yan 已提交
2882 2883
			 struct btrfs_root *root,
			 u64 bytenr, u64 num_bytes, u64 parent,
A
Arne Jansen 已提交
2884
			 u64 root_objectid, u64 owner, u64 offset, int for_cow);
2885

C
Chris Mason 已提交
2886 2887
int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
				    struct btrfs_root *root);
2888
int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
C
Chris Mason 已提交
2889 2890
int btrfs_free_block_groups(struct btrfs_fs_info *info);
int btrfs_read_block_groups(struct btrfs_root *root);
2891
int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2892 2893
int btrfs_make_block_group(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, u64 bytes_used,
2894
			   u64 type, u64 chunk_objectid, u64 chunk_offset,
2895
			   u64 size);
Z
Zheng Yan 已提交
2896 2897
int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root, u64 group_start);
2898 2899
void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
				       struct btrfs_root *root);
Y
Yan Zheng 已提交
2900
u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2901
u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2902
void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2903 2904
int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2905 2906
void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
				struct btrfs_root *root);
2907 2908 2909
int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
				  struct inode *inode);
void btrfs_orphan_release_metadata(struct inode *inode);
2910 2911
int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
				struct btrfs_pending_snapshot *pending);
2912 2913 2914 2915
int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2916 2917 2918
void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
					      unsigned short type);
2919 2920
void btrfs_free_block_rsv(struct btrfs_root *root,
			  struct btrfs_block_rsv *rsv);
2921
int btrfs_block_rsv_add(struct btrfs_root *root,
2922
			struct btrfs_block_rsv *block_rsv,
2923
			u64 num_bytes);
2924 2925 2926
int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
				struct btrfs_block_rsv *block_rsv,
				u64 num_bytes);
2927
int btrfs_block_rsv_check(struct btrfs_root *root,
2928 2929
			  struct btrfs_block_rsv *block_rsv, int min_factor);
int btrfs_block_rsv_refill(struct btrfs_root *root,
2930
			  struct btrfs_block_rsv *block_rsv,
2931
			  u64 min_reserved);
2932 2933 2934
int btrfs_block_rsv_refill_noflush(struct btrfs_root *root,
				   struct btrfs_block_rsv *block_rsv,
				   u64 min_reserved);
2935 2936 2937 2938 2939 2940 2941 2942
int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
			    struct btrfs_block_rsv *dst_rsv,
			    u64 num_bytes);
void btrfs_block_rsv_release(struct btrfs_root *root,
			     struct btrfs_block_rsv *block_rsv,
			     u64 num_bytes);
int btrfs_set_block_group_ro(struct btrfs_root *root,
			     struct btrfs_block_group_cache *cache);
2943 2944
void btrfs_set_block_group_rw(struct btrfs_root *root,
			      struct btrfs_block_group_cache *cache);
2945
void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2946
u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
L
liubo 已提交
2947 2948 2949
int btrfs_error_unpin_extent_range(struct btrfs_root *root,
				   u64 start, u64 end);
int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2950
			       u64 num_bytes, u64 *actual_bytes);
2951 2952
int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root, u64 type);
2953
int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
L
liubo 已提交
2954

2955
int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2956 2957
int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
					 struct btrfs_fs_info *fs_info);
C
Chris Mason 已提交
2958
/* ctree.c */
2959 2960 2961
int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
		     int level, int *slot);
int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2962 2963 2964
int btrfs_previous_item(struct btrfs_root *root,
			struct btrfs_path *path, u64 min_objectid,
			int type);
2965 2966 2967
void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root, struct btrfs_path *path,
			     struct btrfs_key *new_key);
2968 2969
struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2970
int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2971 2972 2973
			struct btrfs_key *key, int lowest_level,
			int cache_only, u64 min_trans);
int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2974
			 struct btrfs_key *max_key,
2975 2976
			 struct btrfs_path *path, int cache_only,
			 u64 min_trans);
2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991
enum btrfs_compare_tree_result {
	BTRFS_COMPARE_TREE_NEW,
	BTRFS_COMPARE_TREE_DELETED,
	BTRFS_COMPARE_TREE_CHANGED,
};
typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
				  struct btrfs_root *right_root,
				  struct btrfs_path *left_path,
				  struct btrfs_path *right_path,
				  struct btrfs_key *key,
				  enum btrfs_compare_tree_result result,
				  void *ctx);
int btrfs_compare_trees(struct btrfs_root *left_root,
			struct btrfs_root *right_root,
			btrfs_changed_cb_t cb, void *ctx);
2992 2993 2994
int btrfs_cow_block(struct btrfs_trans_handle *trans,
		    struct btrfs_root *root, struct extent_buffer *buf,
		    struct extent_buffer *parent, int parent_slot,
2995
		    struct extent_buffer **cow_ret);
2996 2997 2998 2999
int btrfs_copy_root(struct btrfs_trans_handle *trans,
		      struct btrfs_root *root,
		      struct extent_buffer *buf,
		      struct extent_buffer **cow_ret, u64 new_root_objectid);
3000 3001
int btrfs_block_can_be_shared(struct btrfs_root *root,
			      struct extent_buffer *buf);
3002 3003 3004 3005 3006 3007 3008
void btrfs_extend_item(struct btrfs_trans_handle *trans,
		       struct btrfs_root *root, struct btrfs_path *path,
		       u32 data_size);
void btrfs_truncate_item(struct btrfs_trans_handle *trans,
			 struct btrfs_root *root,
			 struct btrfs_path *path,
			 u32 new_size, int from_end);
3009 3010 3011 3012 3013
int btrfs_split_item(struct btrfs_trans_handle *trans,
		     struct btrfs_root *root,
		     struct btrfs_path *path,
		     struct btrfs_key *new_key,
		     unsigned long split_offset);
Y
Yan, Zheng 已提交
3014 3015 3016 3017
int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
			 struct btrfs_root *root,
			 struct btrfs_path *path,
			 struct btrfs_key *new_key);
3018 3019 3020
int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
		      *root, struct btrfs_key *key, struct btrfs_path *p, int
		      ins_len, int cow);
J
Jan Schmidt 已提交
3021 3022
int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
			  struct btrfs_path *p, u64 time_seq);
3023 3024 3025
int btrfs_search_slot_for_read(struct btrfs_root *root,
			       struct btrfs_key *key, struct btrfs_path *p,
			       int find_higher, int return_any);
3026
int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3027
		       struct btrfs_root *root, struct extent_buffer *parent,
3028 3029
		       int start_slot, int cache_only, u64 *last_ret,
		       struct btrfs_key *progress);
3030
void btrfs_release_path(struct btrfs_path *p);
C
Chris Mason 已提交
3031 3032
struct btrfs_path *btrfs_alloc_path(void);
void btrfs_free_path(struct btrfs_path *p);
3033
void btrfs_set_path_blocking(struct btrfs_path *p);
3034
void btrfs_clear_path_blocking(struct btrfs_path *p,
3035
			       struct extent_buffer *held, int held_rw);
3036 3037
void btrfs_unlock_up_safe(struct btrfs_path *p, int level);

3038 3039 3040 3041 3042 3043 3044 3045 3046
int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
		   struct btrfs_path *path, int slot, int nr);
static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
				 struct btrfs_root *root,
				 struct btrfs_path *path)
{
	return btrfs_del_items(trans, root, path, path->slots[0], 1);
}

3047 3048 3049 3050
void setup_items_for_insert(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root, struct btrfs_path *path,
			    struct btrfs_key *cpu_key, u32 *data_size,
			    u32 total_data, u32 total_size, int nr);
3051 3052
int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
		      *root, struct btrfs_key *key, void *data, u32 data_size);
3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066
int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path,
			     struct btrfs_key *cpu_key, u32 *data_size, int nr);

static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
					  struct btrfs_root *root,
					  struct btrfs_path *path,
					  struct btrfs_key *key,
					  u32 data_size)
{
	return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
}

C
Chris Mason 已提交
3067
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
J
Jan Schmidt 已提交
3068 3069
int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
			u64 time_seq);
3070 3071
static inline int btrfs_next_old_item(struct btrfs_root *root,
				      struct btrfs_path *p, u64 time_seq)
3072 3073 3074
{
	++p->slots[0];
	if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3075
		return btrfs_next_old_leaf(root, p, time_seq);
3076 3077
	return 0;
}
3078 3079 3080 3081
static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
{
	return btrfs_next_old_item(root, p, 0);
}
3082
int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3083
int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3084 3085 3086
int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
				     struct btrfs_block_rsv *block_rsv,
				     int update_ref, int for_reloc);
Y
Yan Zheng 已提交
3087 3088 3089 3090
int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct extent_buffer *node,
			struct extent_buffer *parent);
3091 3092 3093 3094 3095 3096 3097 3098
static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
{
	/*
	 * Get synced with close_ctree()
	 */
	smp_mb();
	return fs_info->closing;
}
3099 3100
static inline void free_fs_info(struct btrfs_fs_info *fs_info)
{
3101
	kfree(fs_info->balance_ctl);
3102 3103 3104 3105 3106 3107
	kfree(fs_info->delayed_root);
	kfree(fs_info->extent_root);
	kfree(fs_info->tree_root);
	kfree(fs_info->chunk_root);
	kfree(fs_info->dev_root);
	kfree(fs_info->csum_root);
3108
	kfree(fs_info->quota_root);
3109 3110 3111 3112
	kfree(fs_info->super_copy);
	kfree(fs_info->super_for_commit);
	kfree(fs_info);
}
3113

3114 3115 3116 3117 3118 3119 3120 3121 3122 3123
/* tree mod log functions from ctree.c */
u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
			   struct seq_list *elem);
void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
			    struct seq_list *elem);
static inline u64 btrfs_inc_tree_mod_seq(struct btrfs_fs_info *fs_info)
{
	return atomic_inc_return(&fs_info->tree_mod_seq);
}

C
Chris Mason 已提交
3124
/* root-item.c */
3125
int btrfs_find_root_ref(struct btrfs_root *tree_root,
3126 3127
			struct btrfs_path *path,
			u64 root_id, u64 ref_id);
3128 3129
int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
		       struct btrfs_root *tree_root,
3130 3131 3132 3133 3134
		       u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
		       const char *name, int name_len);
int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
		       struct btrfs_root *tree_root,
		       u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3135
		       const char *name, int name_len);
3136 3137 3138 3139 3140
int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
		   struct btrfs_key *key);
int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
		      *root, struct btrfs_key *key, struct btrfs_root_item
		      *item);
3141 3142 3143 3144
int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
				   struct btrfs_root *root,
				   struct btrfs_key *key,
				   struct btrfs_root_item *item);
3145 3146 3147
void btrfs_read_root_item(struct btrfs_root *root,
			 struct extent_buffer *eb, int slot,
			 struct btrfs_root_item *item);
3148 3149
int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
			 btrfs_root_item *item, struct btrfs_key *key);
3150
int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
3151
int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3152 3153
void btrfs_set_root_node(struct btrfs_root_item *item,
			 struct extent_buffer *node);
3154
void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3155 3156
void btrfs_update_root_times(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root);
3157

C
Chris Mason 已提交
3158
/* dir-item.c */
C
Chris Mason 已提交
3159 3160
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root, const char *name,
3161
			  int name_len, struct inode *dir,
3162
			  struct btrfs_key *location, u8 type, u64 index);
3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173
struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
					     struct btrfs_root *root,
					     struct btrfs_path *path, u64 dir,
					     const char *name, int name_len,
					     int mod);
struct btrfs_dir_item *
btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root,
			    struct btrfs_path *path, u64 dir,
			    u64 objectid, const char *name, int name_len,
			    int mod);
3174 3175 3176 3177
struct btrfs_dir_item *
btrfs_search_dir_index_item(struct btrfs_root *root,
			    struct btrfs_path *path, u64 dirid,
			    const char *name, int name_len);
3178 3179
struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
			      struct btrfs_path *path,
3180
			      const char *name, int name_len);
3181 3182 3183 3184
int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root,
			      struct btrfs_path *path,
			      struct btrfs_dir_item *di);
J
Josef Bacik 已提交
3185
int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3186 3187 3188 3189
			    struct btrfs_root *root,
			    struct btrfs_path *path, u64 objectid,
			    const char *name, u16 name_len,
			    const void *data, u16 data_len);
J
Josef Bacik 已提交
3190 3191 3192 3193 3194
struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
					  struct btrfs_root *root,
					  struct btrfs_path *path, u64 dir,
					  const char *name, u16 name_len,
					  int mod);
3195 3196 3197
int verify_dir_item(struct btrfs_root *root,
		    struct extent_buffer *leaf,
		    struct btrfs_dir_item *dir_item);
3198 3199 3200 3201 3202 3203

/* orphan.c */
int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root, u64 offset);
int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root, u64 offset);
3204
int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3205

C
Chris Mason 已提交
3206
/* inode-item.c */
3207 3208 3209
int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
3210
			   u64 inode_objectid, u64 ref_objectid, u64 index);
3211 3212 3213
int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
3214
			   u64 inode_objectid, u64 ref_objectid, u64 *index);
M
Mark Fasheh 已提交
3215 3216 3217 3218 3219 3220
int btrfs_get_inode_ref_index(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root,
			      struct btrfs_path *path,
			      const char *name, int name_len,
			      u64 inode_objectid, u64 ref_objectid, int mod,
			      u64 *ret_index);
3221 3222 3223
int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid);
3224
int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3225 3226
		       *root, struct btrfs_path *path,
		       struct btrfs_key *location, int mod);
C
Chris Mason 已提交
3227

M
Mark Fasheh 已提交
3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240
struct btrfs_inode_extref *
btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root,
			  struct btrfs_path *path,
			  const char *name, int name_len,
			  u64 inode_objectid, u64 ref_objectid, int ins_len,
			  int cow);

int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
				   u64 ref_objectid, const char *name,
				   int name_len,
				   struct btrfs_inode_extref **extref_ret);

C
Chris Mason 已提交
3241
/* file-item.c */
3242 3243
int btrfs_del_csums(struct btrfs_trans_handle *trans,
		    struct btrfs_root *root, u64 bytenr, u64 len);
3244
int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3245
			  struct bio *bio, u32 *dst);
3246
int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3247
			      struct bio *bio, u64 logical_offset);
C
Chris Mason 已提交
3248
int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
C
Chris Mason 已提交
3249 3250 3251 3252 3253
			     struct btrfs_root *root,
			     u64 objectid, u64 pos,
			     u64 disk_offset, u64 disk_num_bytes,
			     u64 num_bytes, u64 offset, u64 ram_bytes,
			     u8 compression, u8 encryption, u16 other_encoding);
C
Chris Mason 已提交
3254 3255 3256
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid,
3257
			     u64 bytenr, int mod);
3258
int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3259
			   struct btrfs_root *root,
3260
			   struct btrfs_ordered_sum *sums);
3261
int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3262
		       struct bio *bio, u64 file_start, int contig);
C
Chris Mason 已提交
3263 3264 3265
struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
					  struct btrfs_root *root,
					  struct btrfs_path *path,
3266
					  u64 bytenr, int cow);
C
Chris Mason 已提交
3267 3268 3269
int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
			struct btrfs_root *root, struct btrfs_path *path,
			u64 isize);
A
Arne Jansen 已提交
3270 3271
int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
			     struct list_head *list, int search_commit);
C
Chris Mason 已提交
3272
/* inode.c */
J
Josef Bacik 已提交
3273 3274 3275
struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
					   size_t pg_offset, u64 start, u64 len,
					   int create);
3276 3277

/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3278
#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3279 3280 3281 3282 3283
#define ClearPageChecked ClearPageFsMisc
#define SetPageChecked SetPageFsMisc
#define PageChecked PageFsMisc
#endif

L
Li Zefan 已提交
3284 3285 3286 3287 3288 3289 3290 3291
/* This forces readahead on a given range of bytes in an inode */
static inline void btrfs_force_ra(struct address_space *mapping,
				  struct file_ra_state *ra, struct file *file,
				  pgoff_t offset, unsigned long req_size)
{
	page_cache_sync_readahead(mapping, ra, file, offset, req_size);
}

3292 3293
struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
int btrfs_set_inode_index(struct inode *dir, u64 *index);
3294 3295 3296 3297 3298 3299 3300
int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
		       struct btrfs_root *root,
		       struct inode *dir, struct inode *inode,
		       const char *name, int name_len);
int btrfs_add_link(struct btrfs_trans_handle *trans,
		   struct inode *parent_inode, struct inode *inode,
		   const char *name, int name_len, int add_backref, u64 index);
3301 3302 3303 3304
int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct inode *dir, u64 objectid,
			const char *name, int name_len);
J
Josef Bacik 已提交
3305 3306
int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
			int front);
3307 3308 3309 3310 3311
int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
			       struct btrfs_root *root,
			       struct inode *inode, u64 new_size,
			       u32 min_type);

Y
Yan, Zheng 已提交
3312
int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3313 3314
int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
			      struct extent_state **cached_state);
3315 3316
int btrfs_writepages(struct address_space *mapping,
		     struct writeback_control *wbc);
3317
int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3318
			     struct btrfs_root *new_root, u64 new_dirid);
3319
int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
C
Chris Mason 已提交
3320
			 size_t size, struct bio *bio, unsigned long bio_flags);
3321

3322
int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
C
Chris Mason 已提交
3323
int btrfs_readpage(struct file *file, struct page *page);
A
Al Viro 已提交
3324
void btrfs_evict_inode(struct inode *inode);
3325
int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3326
int btrfs_dirty_inode(struct inode *inode);
C
Chris Mason 已提交
3327 3328
struct inode *btrfs_alloc_inode(struct super_block *sb);
void btrfs_destroy_inode(struct inode *inode);
3329
int btrfs_drop_inode(struct inode *inode);
C
Chris Mason 已提交
3330 3331
int btrfs_init_cachep(void);
void btrfs_destroy_cachep(void);
S
Sage Weil 已提交
3332
long btrfs_ioctl_trans_end(struct file *file);
B
Balaji Rao 已提交
3333
struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3334
			 struct btrfs_root *root, int *was_new);
3335
struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3336
				    size_t pg_offset, u64 start, u64 end,
3337 3338 3339 3340
				    int create);
int btrfs_update_inode(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root,
			      struct inode *inode);
3341 3342
int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
3343
int btrfs_orphan_cleanup(struct btrfs_root *root);
3344 3345
void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root);
3346
int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3347
void btrfs_invalidate_inodes(struct btrfs_root *root);
Y
Yan, Zheng 已提交
3348 3349
void btrfs_add_delayed_iput(struct inode *inode);
void btrfs_run_delayed_iputs(struct btrfs_root *root);
3350 3351 3352
int btrfs_prealloc_file_range(struct inode *inode, int mode,
			      u64 start, u64 num_bytes, u64 min_size,
			      loff_t actual_len, u64 *alloc_hint);
3353 3354 3355 3356
int btrfs_prealloc_file_range_trans(struct inode *inode,
				    struct btrfs_trans_handle *trans, int mode,
				    u64 start, u64 num_bytes, u64 min_size,
				    loff_t actual_len, u64 *alloc_hint);
3357
extern const struct dentry_operations btrfs_dentry_operations;
C
Christoph Hellwig 已提交
3358 3359 3360

/* ioctl.c */
long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3361 3362
void btrfs_update_iflags(struct inode *inode);
void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
C
Chris Mason 已提交
3363 3364 3365
int btrfs_defrag_file(struct inode *inode, struct file *file,
		      struct btrfs_ioctl_defrag_range_args *range,
		      u64 newer_than, unsigned long max_pages);
3366 3367 3368
void btrfs_get_block_group_info(struct list_head *groups_list,
				struct btrfs_ioctl_space_info *space);

C
Chris Mason 已提交
3369
/* file.c */
C
Chris Mason 已提交
3370 3371 3372
int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
			   struct inode *inode);
int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3373
int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3374 3375
void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
			     int skip_pinned);
J
Josef Bacik 已提交
3376 3377 3378
int btrfs_replace_extent_cache(struct inode *inode, struct extent_map *replace,
			       u64 start, u64 end, int skip_pinned,
			       int modified);
3379
extern const struct file_operations btrfs_file_operations;
J
Josef Bacik 已提交
3380 3381 3382
int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
			 struct btrfs_root *root, struct inode *inode,
			 struct btrfs_path *path, u64 start, u64 end,
J
Josef Bacik 已提交
3383
			 u64 *drop_end, int drop_cache);
J
Josef Bacik 已提交
3384 3385
int btrfs_drop_extents(struct btrfs_trans_handle *trans,
		       struct btrfs_root *root, struct inode *inode, u64 start,
3386
		       u64 end, int drop_cache);
Y
Yan Zheng 已提交
3387 3388
int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
			      struct inode *inode, u64 start, u64 end);
S
Sage Weil 已提交
3389
int btrfs_release_file(struct inode *inode, struct file *file);
3390 3391 3392 3393 3394
void btrfs_drop_pages(struct page **pages, size_t num_pages);
int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
		      struct page **pages, size_t num_pages,
		      loff_t pos, size_t write_bytes,
		      struct extent_state **cached);
S
Sage Weil 已提交
3395

3396 3397 3398
/* tree-defrag.c */
int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
			struct btrfs_root *root, int cache_only);
3399 3400 3401 3402 3403

/* sysfs.c */
int btrfs_init_sysfs(void);
void btrfs_exit_sysfs(void);

J
Josef Bacik 已提交
3404 3405
/* xattr.c */
ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
J
Josef Bacik 已提交
3406

3407
/* super.c */
3408
int btrfs_parse_options(struct btrfs_root *root, char *options);
S
Sage Weil 已提交
3409
int btrfs_sync_fs(struct super_block *sb, int wait);
3410 3411 3412

#ifdef CONFIG_PRINTK
__printf(2, 3)
J
Jeff Mahoney 已提交
3413
void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...);
3414 3415 3416 3417 3418 3419 3420 3421
#else
static inline __printf(2, 3)
void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...)
{
}
#endif

__printf(5, 6)
L
liubo 已提交
3422
void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
J
Jeff Mahoney 已提交
3423
		     unsigned int line, int errno, const char *fmt, ...);
L
liubo 已提交
3424

3425

3426 3427 3428 3429
void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
			       struct btrfs_root *root, const char *function,
			       unsigned int line, int errno);

3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446
#define btrfs_set_fs_incompat(__fs_info, opt) \
	__btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)

static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
					   u64 flag)
{
	struct btrfs_super_block *disk_super;
	u64 features;

	disk_super = fs_info->super_copy;
	features = btrfs_super_incompat_flags(disk_super);
	if (!(features & flag)) {
		features |= flag;
		btrfs_set_super_incompat_flags(disk_super, features);
	}
}

3447 3448 3449 3450 3451
/*
 * Call btrfs_abort_transaction as early as possible when an error condition is
 * detected, that way the exact line number is reported.
 */

3452 3453 3454 3455 3456
#define btrfs_abort_transaction(trans, root, errno)		\
do {								\
	__btrfs_abort_transaction(trans, root, __func__,	\
				  __LINE__, errno);		\
} while (0)
L
liubo 已提交
3457 3458 3459 3460

#define btrfs_std_error(fs_info, errno)				\
do {								\
	if ((errno))						\
J
Jeff Mahoney 已提交
3461 3462 3463 3464 3465 3466 3467 3468
		__btrfs_std_error((fs_info), __func__,		\
				   __LINE__, (errno), NULL);	\
} while (0)

#define btrfs_error(fs_info, errno, fmt, args...)		\
do {								\
	__btrfs_std_error((fs_info), __func__, __LINE__,	\
			  (errno), fmt, ##args);		\
L
liubo 已提交
3469
} while (0)
J
Josef Bacik 已提交
3470

3471
__printf(5, 6)
J
Jeff Mahoney 已提交
3472 3473 3474 3475 3476 3477 3478 3479
void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
		   unsigned int line, int errno, const char *fmt, ...);

#define btrfs_panic(fs_info, errno, fmt, args...)			\
do {									\
	struct btrfs_fs_info *_i = (fs_info);				\
	__btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args);	\
	BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR));	\
L
liubo 已提交
3480
} while (0)
J
Josef Bacik 已提交
3481 3482

/* acl.c */
C
Chris Mason 已提交
3483
#ifdef CONFIG_BTRFS_FS_POSIX_ACL
3484
struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3485 3486
int btrfs_init_acl(struct btrfs_trans_handle *trans,
		   struct inode *inode, struct inode *dir);
J
Josef Bacik 已提交
3487
int btrfs_acl_chmod(struct inode *inode);
3488
#else
3489
#define btrfs_get_acl NULL
3490 3491 3492 3493 3494 3495 3496 3497 3498 3499
static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
				 struct inode *inode, struct inode *dir)
{
	return 0;
}
static inline int btrfs_acl_chmod(struct inode *inode)
{
	return 0;
}
#endif
J
Josef Bacik 已提交
3500

3501 3502 3503 3504 3505 3506 3507 3508
/* relocation.c */
int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root);
int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root);
int btrfs_recover_relocation(struct btrfs_root *root);
int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3509 3510 3511 3512 3513 3514
void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, struct extent_buffer *buf,
			   struct extent_buffer *cow);
void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
			      struct btrfs_pending_snapshot *pending,
			      u64 *bytes_to_reserve);
3515
int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3516
			      struct btrfs_pending_snapshot *pending);
A
Arne Jansen 已提交
3517 3518 3519

/* scrub.c */
int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
A
Arne Jansen 已提交
3520
		    struct btrfs_scrub_progress *progress, int readonly);
3521 3522 3523 3524
void btrfs_scrub_pause(struct btrfs_root *root);
void btrfs_scrub_pause_super(struct btrfs_root *root);
void btrfs_scrub_continue(struct btrfs_root *root);
void btrfs_scrub_continue_super(struct btrfs_root *root);
3525
int __btrfs_scrub_cancel(struct btrfs_fs_info *info);
A
Arne Jansen 已提交
3526 3527 3528 3529 3530 3531
int btrfs_scrub_cancel(struct btrfs_root *root);
int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
			 struct btrfs_scrub_progress *progress);

3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547
/* reada.c */
struct reada_control {
	struct btrfs_root	*root;		/* tree to prefetch */
	struct btrfs_key	key_start;
	struct btrfs_key	key_end;	/* exclusive */
	atomic_t		elems;
	struct kref		refcnt;
	wait_queue_head_t	wait;
};
struct reada_control *btrfs_reada_add(struct btrfs_root *root,
			      struct btrfs_key *start, struct btrfs_key *end);
int btrfs_reada_wait(void *handle);
void btrfs_reada_detach(void *handle);
int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
			 u64 start, int err);

3548 3549
/* qgroup.c */
struct qgroup_update {
3550
	struct list_head list;
3551 3552
	struct btrfs_delayed_ref_node *node;
	struct btrfs_delayed_extent_op *extent_op;
3553 3554
};

3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590
int btrfs_quota_enable(struct btrfs_trans_handle *trans,
		       struct btrfs_fs_info *fs_info);
int btrfs_quota_disable(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info);
int btrfs_quota_rescan(struct btrfs_fs_info *fs_info);
int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
			      struct btrfs_fs_info *fs_info, u64 src, u64 dst);
int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
			      struct btrfs_fs_info *fs_info, u64 src, u64 dst);
int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info, u64 qgroupid,
			char *name);
int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
			      struct btrfs_fs_info *fs_info, u64 qgroupid);
int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
		       struct btrfs_fs_info *fs_info, u64 qgroupid,
		       struct btrfs_qgroup_limit *limit);
int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
struct btrfs_delayed_extent_op;
int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans,
			    struct btrfs_delayed_ref_node *node,
			    struct btrfs_delayed_extent_op *extent_op);
int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
			     struct btrfs_fs_info *fs_info,
			     struct btrfs_delayed_ref_node *node,
			     struct btrfs_delayed_extent_op *extent_op);
int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
		      struct btrfs_fs_info *fs_info);
int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
			 struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
			 struct btrfs_qgroup_inherit *inherit);
int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes);
void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes);

void assert_qgroups_uptodate(struct btrfs_trans_handle *trans);
3591

3592 3593 3594 3595 3596 3597 3598
static inline int is_fstree(u64 rootid)
{
	if (rootid == BTRFS_FS_TREE_OBJECTID ||
	    (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)
		return 1;
	return 0;
}
3599
#endif