2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
23 #include <linux/highmem.h>
25 #include <linux/rwsem.h>
26 #include <linux/semaphore.h>
27 #include <linux/completion.h>
28 #include <linux/backing-dev.h>
29 #include <linux/wait.h>
30 #include <linux/slab.h>
31 #include <linux/kobject.h>
32 #include <trace/events/btrfs.h>
33 #include <asm/kmap_types.h>
34 #include <linux/pagemap.h>
35 #include <linux/btrfs.h>
36 #include "extent_io.h"
37 #include "extent_map.h"
38 #include "async-thread.h"
40 struct btrfs_trans_handle
;
41 struct btrfs_transaction
;
42 struct btrfs_pending_snapshot
;
43 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
44 extern struct kmem_cache
*btrfs_transaction_cachep
;
45 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
46 extern struct kmem_cache
*btrfs_path_cachep
;
47 extern struct kmem_cache
*btrfs_free_space_cachep
;
48 struct btrfs_ordered_sum
;
50 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
51 #define STATIC noinline
53 #define STATIC static noinline
56 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
58 #define BTRFS_MAX_MIRRORS 3
60 #define BTRFS_MAX_LEVEL 8
62 #define BTRFS_COMPAT_EXTENT_TREE_V0
65 * files bigger than this get some pre-flushing when they are added
66 * to the ordered operations list. That way we limit the total
67 * work done by the commit
69 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
71 /* holds pointers to all of the tree roots */
72 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
74 /* stores information about which extents are in use, and reference counts */
75 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
78 * chunk tree stores translations from logical -> physical block numbering
79 * the super block points to the chunk tree
81 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
84 * stores information about which areas of a given device are in use.
85 * one per device. The tree of tree roots points to the device tree
87 #define BTRFS_DEV_TREE_OBJECTID 4ULL
89 /* one per subvolume, storing files and directories */
90 #define BTRFS_FS_TREE_OBJECTID 5ULL
92 /* directory objectid inside the root tree */
93 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
95 /* holds checksums of all the data extents */
96 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
98 /* holds quota configuration and tracking */
99 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
101 /* for storing items that use the BTRFS_UUID_KEY* types */
102 #define BTRFS_UUID_TREE_OBJECTID 9ULL
104 /* for storing balance parameters in the root tree */
105 #define BTRFS_BALANCE_OBJECTID -4ULL
107 /* orhpan objectid for tracking unlinked/truncated files */
108 #define BTRFS_ORPHAN_OBJECTID -5ULL
110 /* does write ahead logging to speed up fsyncs */
111 #define BTRFS_TREE_LOG_OBJECTID -6ULL
112 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
114 /* for space balancing */
115 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
116 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
119 * extent checksums all have this objectid
120 * this allows them to share the logging tree
123 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
125 /* For storing free space cache */
126 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
129 * The inode number assigned to the special inode for storing
132 #define BTRFS_FREE_INO_OBJECTID -12ULL
134 /* dummy objectid represents multiple objectids */
135 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
138 * All files have objectids in this range.
140 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
141 #define BTRFS_LAST_FREE_OBJECTID -256ULL
142 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
146 * the device items go into the chunk tree. The key is in the form
147 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
149 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
151 #define BTRFS_BTREE_INODE_OBJECTID 1
153 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
155 #define BTRFS_DEV_REPLACE_DEVID 0ULL
158 * the max metadata block size. This limit is somewhat artificial,
159 * but the memmove costs go through the roof for larger blocks.
161 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
164 * we can actually store much bigger names, but lets not confuse the rest
167 #define BTRFS_NAME_LEN 255
170 * Theoretical limit is larger, but we keep this down to a sane
171 * value. That should limit greatly the possibility of collisions on
174 #define BTRFS_LINK_MAX 65535U
176 /* 32 bytes in various csum fields */
177 #define BTRFS_CSUM_SIZE 32
180 #define BTRFS_CSUM_TYPE_CRC32 0
182 static int btrfs_csum_sizes
[] = { 4, 0 };
184 /* four bytes for CRC32 */
185 #define BTRFS_EMPTY_DIR_SIZE 0
187 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
188 #define REQ_GET_READ_MIRRORS (1 << 30)
190 #define BTRFS_FT_UNKNOWN 0
191 #define BTRFS_FT_REG_FILE 1
192 #define BTRFS_FT_DIR 2
193 #define BTRFS_FT_CHRDEV 3
194 #define BTRFS_FT_BLKDEV 4
195 #define BTRFS_FT_FIFO 5
196 #define BTRFS_FT_SOCK 6
197 #define BTRFS_FT_SYMLINK 7
198 #define BTRFS_FT_XATTR 8
199 #define BTRFS_FT_MAX 9
201 /* ioprio of readahead is set to idle */
202 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
204 #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
207 * The key defines the order in the tree, and so it also defines (optimal)
210 * objectid corresponds to the inode number.
212 * type tells us things about the object, and is a kind of stream selector.
213 * so for a given inode, keys with type of 1 might refer to the inode data,
214 * type of 2 may point to file data in the btree and type == 3 may point to
217 * offset is the starting byte offset for this key in the stream.
219 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
220 * in cpu native order. Otherwise they are identical and their sizes
221 * should be the same (ie both packed)
223 struct btrfs_disk_key
{
227 } __attribute__ ((__packed__
));
233 } __attribute__ ((__packed__
));
235 struct btrfs_mapping_tree
{
236 struct extent_map_tree map_tree
;
239 struct btrfs_dev_item
{
240 /* the internal btrfs device id */
243 /* size of the device */
249 /* optimal io alignment for this device */
252 /* optimal io width for this device */
255 /* minimal io size for this device */
258 /* type and info about this device */
261 /* expected generation for this device */
265 * starting byte of this partition on the device,
266 * to allow for stripe alignment in the future
270 /* grouping information for allocation decisions */
273 /* seek speed 0-100 where 100 is fastest */
276 /* bandwidth 0-100 where 100 is fastest */
279 /* btrfs generated uuid for this device */
280 u8 uuid
[BTRFS_UUID_SIZE
];
282 /* uuid of FS who owns this device */
283 u8 fsid
[BTRFS_UUID_SIZE
];
284 } __attribute__ ((__packed__
));
286 struct btrfs_stripe
{
289 u8 dev_uuid
[BTRFS_UUID_SIZE
];
290 } __attribute__ ((__packed__
));
293 /* size of this chunk in bytes */
296 /* objectid of the root referencing this chunk */
302 /* optimal io alignment for this chunk */
305 /* optimal io width for this chunk */
308 /* minimal io size for this chunk */
311 /* 2^16 stripes is quite a lot, a second limit is the size of a single
316 /* sub stripes only matter for raid10 */
318 struct btrfs_stripe stripe
;
319 /* additional stripes go here */
320 } __attribute__ ((__packed__
));
322 #define BTRFS_FREE_SPACE_EXTENT 1
323 #define BTRFS_FREE_SPACE_BITMAP 2
325 struct btrfs_free_space_entry
{
329 } __attribute__ ((__packed__
));
331 struct btrfs_free_space_header
{
332 struct btrfs_disk_key location
;
336 } __attribute__ ((__packed__
));
338 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
340 BUG_ON(num_stripes
== 0);
341 return sizeof(struct btrfs_chunk
) +
342 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
345 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
346 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
351 #define BTRFS_FS_STATE_ERROR 0
352 #define BTRFS_FS_STATE_REMOUNTING 1
353 #define BTRFS_FS_STATE_TRANS_ABORTED 2
354 #define BTRFS_FS_STATE_DEV_REPLACING 3
356 /* Super block flags */
357 /* Errors detected */
358 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
360 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
361 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
363 #define BTRFS_BACKREF_REV_MAX 256
364 #define BTRFS_BACKREF_REV_SHIFT 56
365 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
366 BTRFS_BACKREF_REV_SHIFT)
368 #define BTRFS_OLD_BACKREF_REV 0
369 #define BTRFS_MIXED_BACKREF_REV 1
372 * every tree block (leaf or node) starts with this header.
374 struct btrfs_header
{
375 /* these first four must match the super block */
376 u8 csum
[BTRFS_CSUM_SIZE
];
377 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
378 __le64 bytenr
; /* which block this node is supposed to live in */
381 /* allowed to be different from the super from here on down */
382 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
387 } __attribute__ ((__packed__
));
389 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
390 sizeof(struct btrfs_header)) / \
391 sizeof(struct btrfs_key_ptr))
392 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
393 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
394 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
395 sizeof(struct btrfs_item) - \
396 sizeof(struct btrfs_file_extent_item))
397 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
398 sizeof(struct btrfs_item) -\
399 sizeof(struct btrfs_dir_item))
403 * this is a very generous portion of the super block, giving us
404 * room to translate 14 chunks with 3 stripes each.
406 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
407 #define BTRFS_LABEL_SIZE 256
410 * just in case we somehow lose the roots and are not able to mount,
411 * we store an array of the roots from previous transactions
414 #define BTRFS_NUM_BACKUP_ROOTS 4
415 struct btrfs_root_backup
{
417 __le64 tree_root_gen
;
420 __le64 chunk_root_gen
;
423 __le64 extent_root_gen
;
432 __le64 csum_root_gen
;
442 u8 extent_root_level
;
446 /* future and to align */
448 } __attribute__ ((__packed__
));
451 * the super block basically lists the main trees of the FS
452 * it currently lacks any block count etc etc
454 struct btrfs_super_block
{
455 u8 csum
[BTRFS_CSUM_SIZE
];
456 /* the first 4 fields must match struct btrfs_header */
457 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
458 __le64 bytenr
; /* this block number */
461 /* allowed to be different from the btrfs_header from here own down */
468 /* this will help find the new super based on the log root */
469 __le64 log_root_transid
;
472 __le64 root_dir_objectid
;
478 __le32 sys_chunk_array_size
;
479 __le64 chunk_root_generation
;
481 __le64 compat_ro_flags
;
482 __le64 incompat_flags
;
487 struct btrfs_dev_item dev_item
;
489 char label
[BTRFS_LABEL_SIZE
];
491 __le64 cache_generation
;
492 __le64 uuid_tree_generation
;
494 /* future expansion */
496 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
497 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
498 } __attribute__ ((__packed__
));
501 * Compat flags that we support. If any incompat flags are set other than the
502 * ones specified below then we will fail to mount
504 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
505 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
506 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
507 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
509 * some patches floated around with a second compression method
510 * lets save that incompat here for when they do get in
511 * Note we don't actually support it, we're just reserving the
514 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
517 * older kernels tried to do bigger metadata blocks, but the
518 * code was pretty buggy. Lets not let them try anymore.
520 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
522 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
523 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
524 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
525 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
527 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
528 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
529 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
530 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
531 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
532 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
534 #define BTRFS_FEATURE_INCOMPAT_SUPP \
535 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
536 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
537 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
538 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
539 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
540 BTRFS_FEATURE_INCOMPAT_RAID56 | \
541 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
542 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
543 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
545 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
546 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
547 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
550 * A leaf is full of items. offset and size tell us where to find
551 * the item in the leaf (relative to the start of the data area)
554 struct btrfs_disk_key key
;
557 } __attribute__ ((__packed__
));
560 * leaves have an item area and a data area:
561 * [item0, item1....itemN] [free space] [dataN...data1, data0]
563 * The data is separate from the items to get the keys closer together
567 struct btrfs_header header
;
568 struct btrfs_item items
[];
569 } __attribute__ ((__packed__
));
572 * all non-leaf blocks are nodes, they hold only keys and pointers to
575 struct btrfs_key_ptr
{
576 struct btrfs_disk_key key
;
579 } __attribute__ ((__packed__
));
582 struct btrfs_header header
;
583 struct btrfs_key_ptr ptrs
[];
584 } __attribute__ ((__packed__
));
587 * btrfs_paths remember the path taken from the root down to the leaf.
588 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
589 * to any other levels that are present.
591 * The slots array records the index of the item or block pointer
592 * used while walking the tree.
595 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
596 int slots
[BTRFS_MAX_LEVEL
];
597 /* if there is real range locking, this locks field will change */
598 int locks
[BTRFS_MAX_LEVEL
];
600 /* keep some upper locks as we walk down */
604 * set by btrfs_split_item, tells search_slot to keep all locks
605 * and to force calls to keep space in the nodes
607 unsigned int search_for_split
:1;
608 unsigned int keep_locks
:1;
609 unsigned int skip_locking
:1;
610 unsigned int leave_spinning
:1;
611 unsigned int search_commit_root
:1;
612 unsigned int need_commit_sem
:1;
616 * items in the extent btree are used to record the objectid of the
617 * owner of the block and the number of references
620 struct btrfs_extent_item
{
624 } __attribute__ ((__packed__
));
626 struct btrfs_extent_item_v0
{
628 } __attribute__ ((__packed__
));
630 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
631 sizeof(struct btrfs_item))
633 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
634 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
636 /* following flags only apply to tree blocks */
638 /* use full backrefs for extent pointers in the block */
639 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
642 * this flag is only used internally by scrub and may be changed at any time
643 * it is only declared here to avoid collisions
645 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
647 struct btrfs_tree_block_info
{
648 struct btrfs_disk_key key
;
650 } __attribute__ ((__packed__
));
652 struct btrfs_extent_data_ref
{
657 } __attribute__ ((__packed__
));
659 struct btrfs_shared_data_ref
{
661 } __attribute__ ((__packed__
));
663 struct btrfs_extent_inline_ref
{
666 } __attribute__ ((__packed__
));
668 /* old style backrefs item */
669 struct btrfs_extent_ref_v0
{
674 } __attribute__ ((__packed__
));
677 /* dev extents record free space on individual devices. The owner
678 * field points back to the chunk allocation mapping tree that allocated
679 * the extent. The chunk tree uuid field is a way to double check the owner
681 struct btrfs_dev_extent
{
683 __le64 chunk_objectid
;
686 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
687 } __attribute__ ((__packed__
));
689 struct btrfs_inode_ref
{
693 } __attribute__ ((__packed__
));
695 struct btrfs_inode_extref
{
696 __le64 parent_objectid
;
701 } __attribute__ ((__packed__
));
703 struct btrfs_timespec
{
706 } __attribute__ ((__packed__
));
708 enum btrfs_compression_type
{
709 BTRFS_COMPRESS_NONE
= 0,
710 BTRFS_COMPRESS_ZLIB
= 1,
711 BTRFS_COMPRESS_LZO
= 2,
712 BTRFS_COMPRESS_TYPES
= 2,
713 BTRFS_COMPRESS_LAST
= 3,
716 struct btrfs_inode_item
{
717 /* nfs style generation number */
719 /* transid that last touched this inode */
731 /* modification sequence number for NFS */
735 * a little future expansion, for more than this we can
736 * just grow the inode item and version it
739 struct btrfs_timespec atime
;
740 struct btrfs_timespec ctime
;
741 struct btrfs_timespec mtime
;
742 struct btrfs_timespec otime
;
743 } __attribute__ ((__packed__
));
745 struct btrfs_dir_log_item
{
747 } __attribute__ ((__packed__
));
749 struct btrfs_dir_item
{
750 struct btrfs_disk_key location
;
755 } __attribute__ ((__packed__
));
757 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
760 * Internal in-memory flag that a subvolume has been marked for deletion but
761 * still visible as a directory
763 #define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48)
765 struct btrfs_root_item
{
766 struct btrfs_inode_item inode
;
772 __le64 last_snapshot
;
775 struct btrfs_disk_key drop_progress
;
780 * The following fields appear after subvol_uuids+subvol_times
785 * This generation number is used to test if the new fields are valid
786 * and up to date while reading the root item. Everytime the root item
787 * is written out, the "generation" field is copied into this field. If
788 * anyone ever mounted the fs with an older kernel, we will have
789 * mismatching generation values here and thus must invalidate the
790 * new fields. See btrfs_update_root and btrfs_find_last_root for
792 * the offset of generation_v2 is also used as the start for the memset
793 * when invalidating the fields.
795 __le64 generation_v2
;
796 u8 uuid
[BTRFS_UUID_SIZE
];
797 u8 parent_uuid
[BTRFS_UUID_SIZE
];
798 u8 received_uuid
[BTRFS_UUID_SIZE
];
799 __le64 ctransid
; /* updated when an inode changes */
800 __le64 otransid
; /* trans when created */
801 __le64 stransid
; /* trans when sent. non-zero for received subvol */
802 __le64 rtransid
; /* trans when received. non-zero for received subvol */
803 struct btrfs_timespec ctime
;
804 struct btrfs_timespec otime
;
805 struct btrfs_timespec stime
;
806 struct btrfs_timespec rtime
;
807 __le64 reserved
[8]; /* for future */
808 } __attribute__ ((__packed__
));
811 * this is used for both forward and backward root refs
813 struct btrfs_root_ref
{
817 } __attribute__ ((__packed__
));
819 struct btrfs_disk_balance_args
{
821 * profiles to operate on, single is denoted by
822 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
832 /* devid subset filter [pstart..pend) */
836 /* btrfs virtual address space subset filter [vstart..vend) */
841 * profile to convert to, single is denoted by
842 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
846 /* BTRFS_BALANCE_ARGS_* */
849 /* BTRFS_BALANCE_ARGS_LIMIT value */
853 } __attribute__ ((__packed__
));
856 * store balance parameters to disk so that balance can be properly
857 * resumed after crash or unmount
859 struct btrfs_balance_item
{
860 /* BTRFS_BALANCE_* */
863 struct btrfs_disk_balance_args data
;
864 struct btrfs_disk_balance_args meta
;
865 struct btrfs_disk_balance_args sys
;
868 } __attribute__ ((__packed__
));
870 #define BTRFS_FILE_EXTENT_INLINE 0
871 #define BTRFS_FILE_EXTENT_REG 1
872 #define BTRFS_FILE_EXTENT_PREALLOC 2
874 struct btrfs_file_extent_item
{
876 * transaction id that created this extent
880 * max number of bytes to hold this extent in ram
881 * when we split a compressed extent we can't know how big
882 * each of the resulting pieces will be. So, this is
883 * an upper limit on the size of the extent in ram instead of
889 * 32 bits for the various ways we might encode the data,
890 * including compression and encryption. If any of these
891 * are set to something a given disk format doesn't understand
892 * it is treated like an incompat flag for reading and writing,
897 __le16 other_encoding
; /* spare for later use */
899 /* are we inline data or a real extent? */
903 * disk space consumed by the extent, checksum blocks are included
907 __le64 disk_num_bytes
;
909 * the logical offset in file blocks (no csums)
910 * this extent record is for. This allows a file extent to point
911 * into the middle of an existing extent on disk, sharing it
912 * between two snapshots (useful if some bytes in the middle of the
913 * extent have changed
917 * the logical number of file blocks (no csums included). This
918 * always reflects the size uncompressed and without encoding.
922 } __attribute__ ((__packed__
));
924 struct btrfs_csum_item
{
926 } __attribute__ ((__packed__
));
928 struct btrfs_dev_stats_item
{
930 * grow this item struct at the end for future enhancements and keep
931 * the existing values unchanged
933 __le64 values
[BTRFS_DEV_STAT_VALUES_MAX
];
934 } __attribute__ ((__packed__
));
936 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
937 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
938 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
939 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
940 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
941 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
942 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
944 struct btrfs_dev_replace
{
945 u64 replace_state
; /* see #define above */
946 u64 time_started
; /* seconds since 1-Jan-1970 */
947 u64 time_stopped
; /* seconds since 1-Jan-1970 */
948 atomic64_t num_write_errors
;
949 atomic64_t num_uncorrectable_read_errors
;
952 u64 committed_cursor_left
;
953 u64 cursor_left_last_write_of_item
;
956 u64 cont_reading_from_srcdev_mode
; /* see #define above */
959 int item_needs_writeback
;
960 struct btrfs_device
*srcdev
;
961 struct btrfs_device
*tgtdev
;
964 atomic_t nesting_level
;
965 struct mutex lock_finishing_cancel_unmount
;
966 struct mutex lock_management_lock
;
969 struct btrfs_scrub_progress scrub_progress
;
972 struct btrfs_dev_replace_item
{
974 * grow this item struct at the end for future enhancements and keep
975 * the existing values unchanged
980 __le64 cont_reading_from_srcdev_mode
;
982 __le64 replace_state
;
985 __le64 num_write_errors
;
986 __le64 num_uncorrectable_read_errors
;
987 } __attribute__ ((__packed__
));
989 /* different types of block groups (and chunks) */
990 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
991 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
992 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
993 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
994 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
995 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
996 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
997 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
998 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
999 #define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
1000 BTRFS_SPACE_INFO_GLOBAL_RSV)
1002 enum btrfs_raid_types
{
1013 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1014 BTRFS_BLOCK_GROUP_SYSTEM | \
1015 BTRFS_BLOCK_GROUP_METADATA)
1017 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1018 BTRFS_BLOCK_GROUP_RAID1 | \
1019 BTRFS_BLOCK_GROUP_RAID5 | \
1020 BTRFS_BLOCK_GROUP_RAID6 | \
1021 BTRFS_BLOCK_GROUP_DUP | \
1022 BTRFS_BLOCK_GROUP_RAID10)
1024 * We need a bit for restriper to be able to tell when chunks of type
1025 * SINGLE are available. This "extended" profile format is used in
1026 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1027 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1028 * to avoid remappings between two formats in future.
1030 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1033 * A fake block group type that is used to communicate global block reserve
1034 * size to userspace via the SPACE_INFO ioctl.
1036 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
1038 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1039 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1041 static inline u64
chunk_to_extended(u64 flags
)
1043 if ((flags
& BTRFS_BLOCK_GROUP_PROFILE_MASK
) == 0)
1044 flags
|= BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1048 static inline u64
extended_to_chunk(u64 flags
)
1050 return flags
& ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1053 struct btrfs_block_group_item
{
1055 __le64 chunk_objectid
;
1057 } __attribute__ ((__packed__
));
1060 * is subvolume quota turned on?
1062 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1064 * RESCAN is set during the initialization phase
1066 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1068 * Some qgroup entries are known to be out of date,
1069 * either because the configuration has changed in a way that
1070 * makes a rescan necessary, or because the fs has been mounted
1071 * with a non-qgroup-aware version.
1072 * Turning qouta off and on again makes it inconsistent, too.
1074 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1076 #define BTRFS_QGROUP_STATUS_VERSION 1
1078 struct btrfs_qgroup_status_item
{
1081 * the generation is updated during every commit. As older
1082 * versions of btrfs are not aware of qgroups, it will be
1083 * possible to detect inconsistencies by checking the
1084 * generation on mount time
1088 /* flag definitions see above */
1092 * only used during scanning to record the progress
1093 * of the scan. It contains a logical address
1096 } __attribute__ ((__packed__
));
1098 struct btrfs_qgroup_info_item
{
1104 } __attribute__ ((__packed__
));
1106 /* flags definition for qgroup limits */
1107 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1108 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1109 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1110 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1111 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1112 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1114 struct btrfs_qgroup_limit_item
{
1116 * only updated when any of the other values change
1123 } __attribute__ ((__packed__
));
1125 struct btrfs_space_info
{
1128 u64 total_bytes
; /* total bytes in the space,
1129 this doesn't take mirrors into account */
1130 u64 bytes_used
; /* total bytes used,
1131 this doesn't take mirrors into account */
1132 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
1133 transaction finishes */
1134 u64 bytes_reserved
; /* total bytes the allocator has reserved for
1135 current allocations */
1136 u64 bytes_may_use
; /* number of bytes that may be used for
1137 delalloc/allocations */
1138 u64 bytes_readonly
; /* total bytes that are read only */
1140 unsigned int full
:1; /* indicates that we cannot allocate any more
1141 chunks for this space */
1142 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
1144 unsigned int flush
:1; /* set if we are trying to make space */
1146 unsigned int force_alloc
; /* set if we need to force a chunk
1147 alloc for this space */
1149 u64 disk_used
; /* total bytes used on disk */
1150 u64 disk_total
; /* total bytes on disk, takes mirrors into
1156 * bytes_pinned is kept in line with what is actually pinned, as in
1157 * we've called update_block_group and dropped the bytes_used counter
1158 * and increased the bytes_pinned counter. However this means that
1159 * bytes_pinned does not reflect the bytes that will be pinned once the
1160 * delayed refs are flushed, so this counter is inc'ed everytime we call
1161 * btrfs_free_extent so it is a realtime count of what will be freed
1162 * once the transaction is committed. It will be zero'ed everytime the
1163 * transaction commits.
1165 struct percpu_counter total_bytes_pinned
;
1167 struct list_head list
;
1169 struct rw_semaphore groups_sem
;
1170 /* for block groups in our same type */
1171 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
1172 wait_queue_head_t wait
;
1174 struct kobject kobj
;
1175 struct kobject block_group_kobjs
[BTRFS_NR_RAID_TYPES
];
1178 #define BTRFS_BLOCK_RSV_GLOBAL 1
1179 #define BTRFS_BLOCK_RSV_DELALLOC 2
1180 #define BTRFS_BLOCK_RSV_TRANS 3
1181 #define BTRFS_BLOCK_RSV_CHUNK 4
1182 #define BTRFS_BLOCK_RSV_DELOPS 5
1183 #define BTRFS_BLOCK_RSV_EMPTY 6
1184 #define BTRFS_BLOCK_RSV_TEMP 7
1186 struct btrfs_block_rsv
{
1189 struct btrfs_space_info
*space_info
;
1191 unsigned short full
;
1192 unsigned short type
;
1193 unsigned short failfast
;
1197 * free clusters are used to claim free space in relatively large chunks,
1198 * allowing us to do less seeky writes. They are used for all metadata
1199 * allocations and data allocations in ssd mode.
1201 struct btrfs_free_cluster
{
1203 spinlock_t refill_lock
;
1204 struct rb_root root
;
1206 /* largest extent in this cluster */
1209 /* first extent starting offset */
1212 struct btrfs_block_group_cache
*block_group
;
1214 * when a cluster is allocated from a block group, we put the
1215 * cluster onto a list in the block group so that it can
1216 * be freed before the block group is freed.
1218 struct list_head block_group_list
;
1221 enum btrfs_caching_type
{
1223 BTRFS_CACHE_STARTED
= 1,
1224 BTRFS_CACHE_FAST
= 2,
1225 BTRFS_CACHE_FINISHED
= 3,
1226 BTRFS_CACHE_ERROR
= 4,
1229 enum btrfs_disk_cache_state
{
1230 BTRFS_DC_WRITTEN
= 0,
1234 BTRFS_DC_NEED_WRITE
= 4,
1237 struct btrfs_caching_control
{
1238 struct list_head list
;
1240 wait_queue_head_t wait
;
1241 struct btrfs_work work
;
1242 struct btrfs_block_group_cache
*block_group
;
1247 struct btrfs_block_group_cache
{
1248 struct btrfs_key key
;
1249 struct btrfs_block_group_item item
;
1250 struct btrfs_fs_info
*fs_info
;
1251 struct inode
*inode
;
1258 u64 cache_generation
;
1260 /* for raid56, this is a full stripe, without parity */
1261 unsigned long full_stripe_len
;
1264 unsigned int dirty
:1;
1265 unsigned int iref
:1;
1267 int disk_cache_state
;
1269 /* cache tracking stuff */
1271 struct btrfs_caching_control
*caching_ctl
;
1272 u64 last_byte_to_unpin
;
1274 struct btrfs_space_info
*space_info
;
1276 /* free space cache stuff */
1277 struct btrfs_free_space_ctl
*free_space_ctl
;
1279 /* block group cache stuff */
1280 struct rb_node cache_node
;
1282 /* for block groups in the same raid type */
1283 struct list_head list
;
1288 /* List of struct btrfs_free_clusters for this block group.
1289 * Today it will only have one thing on it, but that may change
1291 struct list_head cluster_list
;
1293 /* For delayed block group creation */
1294 struct list_head new_bg_list
;
1297 /* delayed seq elem */
1299 struct list_head list
;
1303 enum btrfs_orphan_cleanup_state
{
1304 ORPHAN_CLEANUP_STARTED
= 1,
1305 ORPHAN_CLEANUP_DONE
= 2,
1308 /* used by the raid56 code to lock stripes for read/modify/write */
1309 struct btrfs_stripe_hash
{
1310 struct list_head hash_list
;
1311 wait_queue_head_t wait
;
1315 /* used by the raid56 code to lock stripes for read/modify/write */
1316 struct btrfs_stripe_hash_table
{
1317 struct list_head stripe_cache
;
1318 spinlock_t cache_lock
;
1320 struct btrfs_stripe_hash table
[];
1323 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1326 struct reloc_control
;
1327 struct btrfs_device
;
1328 struct btrfs_fs_devices
;
1329 struct btrfs_balance_control
;
1330 struct btrfs_delayed_root
;
1331 struct btrfs_fs_info
{
1332 u8 fsid
[BTRFS_FSID_SIZE
];
1333 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1334 struct btrfs_root
*extent_root
;
1335 struct btrfs_root
*tree_root
;
1336 struct btrfs_root
*chunk_root
;
1337 struct btrfs_root
*dev_root
;
1338 struct btrfs_root
*fs_root
;
1339 struct btrfs_root
*csum_root
;
1340 struct btrfs_root
*quota_root
;
1341 struct btrfs_root
*uuid_root
;
1343 /* the log root tree is a directory of all the other log roots */
1344 struct btrfs_root
*log_root_tree
;
1346 spinlock_t fs_roots_radix_lock
;
1347 struct radix_tree_root fs_roots_radix
;
1349 /* block group cache stuff */
1350 spinlock_t block_group_cache_lock
;
1351 u64 first_logical_byte
;
1352 struct rb_root block_group_cache_tree
;
1354 /* keep track of unallocated space */
1355 spinlock_t free_chunk_lock
;
1356 u64 free_chunk_space
;
1358 struct extent_io_tree freed_extents
[2];
1359 struct extent_io_tree
*pinned_extents
;
1361 /* logical->physical extent mapping */
1362 struct btrfs_mapping_tree mapping_tree
;
1365 * block reservation for extent, checksum, root tree and
1366 * delayed dir index item
1368 struct btrfs_block_rsv global_block_rsv
;
1369 /* block reservation for delay allocation */
1370 struct btrfs_block_rsv delalloc_block_rsv
;
1371 /* block reservation for metadata operations */
1372 struct btrfs_block_rsv trans_block_rsv
;
1373 /* block reservation for chunk tree */
1374 struct btrfs_block_rsv chunk_block_rsv
;
1375 /* block reservation for delayed operations */
1376 struct btrfs_block_rsv delayed_block_rsv
;
1378 struct btrfs_block_rsv empty_block_rsv
;
1381 u64 last_trans_committed
;
1382 u64 avg_delayed_ref_runtime
;
1385 * this is updated to the current trans every time a full commit
1386 * is required instead of the faster short fsync log commits
1388 u64 last_trans_log_full_commit
;
1389 unsigned long mount_opt
;
1390 unsigned long compress_type
:4;
1391 int commit_interval
;
1393 * It is a suggestive number, the read side is safe even it gets a
1394 * wrong number because we will write out the data into a regular
1395 * extent. The write side(mount/remount) is under ->s_umount lock,
1396 * so it is also safe.
1400 * Protected by ->chunk_mutex and sb->s_umount.
1402 * The reason that we use two lock to protect it is because only
1403 * remount and mount operations can change it and these two operations
1404 * are under sb->s_umount, but the read side (chunk allocation) can not
1405 * acquire sb->s_umount or the deadlock would happen. So we use two
1406 * locks to protect it. On the write side, we must acquire two locks,
1407 * and on the read side, we just need acquire one of them.
1410 struct btrfs_transaction
*running_transaction
;
1411 wait_queue_head_t transaction_throttle
;
1412 wait_queue_head_t transaction_wait
;
1413 wait_queue_head_t transaction_blocked_wait
;
1414 wait_queue_head_t async_submit_wait
;
1417 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1418 * when they are updated.
1420 * Because we do not clear the flags for ever, so we needn't use
1421 * the lock on the read side.
1423 * We also needn't use the lock when we mount the fs, because
1424 * there is no other task which will update the flag.
1426 spinlock_t super_lock
;
1427 struct btrfs_super_block
*super_copy
;
1428 struct btrfs_super_block
*super_for_commit
;
1429 struct block_device
*__bdev
;
1430 struct super_block
*sb
;
1431 struct inode
*btree_inode
;
1432 struct backing_dev_info bdi
;
1433 struct mutex tree_log_mutex
;
1434 struct mutex transaction_kthread_mutex
;
1435 struct mutex cleaner_mutex
;
1436 struct mutex chunk_mutex
;
1437 struct mutex volume_mutex
;
1439 /* this is used during read/modify/write to make sure
1440 * no two ios are trying to mod the same stripe at the same
1443 struct btrfs_stripe_hash_table
*stripe_hash_table
;
1446 * this protects the ordered operations list only while we are
1447 * processing all of the entries on it. This way we make
1448 * sure the commit code doesn't find the list temporarily empty
1449 * because another function happens to be doing non-waiting preflush
1450 * before jumping into the main commit.
1452 struct mutex ordered_operations_mutex
;
1455 * Same as ordered_operations_mutex except this is for ordered extents
1456 * and not the operations.
1458 struct mutex ordered_extent_flush_mutex
;
1460 struct rw_semaphore commit_root_sem
;
1462 struct rw_semaphore cleanup_work_sem
;
1464 struct rw_semaphore subvol_sem
;
1465 struct srcu_struct subvol_srcu
;
1467 spinlock_t trans_lock
;
1469 * the reloc mutex goes with the trans lock, it is taken
1470 * during commit to protect us from the relocation code
1472 struct mutex reloc_mutex
;
1474 struct list_head trans_list
;
1475 struct list_head dead_roots
;
1476 struct list_head caching_block_groups
;
1478 spinlock_t delayed_iput_lock
;
1479 struct list_head delayed_iputs
;
1481 /* this protects tree_mod_seq_list */
1482 spinlock_t tree_mod_seq_lock
;
1483 atomic64_t tree_mod_seq
;
1484 struct list_head tree_mod_seq_list
;
1486 /* this protects tree_mod_log */
1487 rwlock_t tree_mod_log_lock
;
1488 struct rb_root tree_mod_log
;
1490 atomic_t nr_async_submits
;
1491 atomic_t async_submit_draining
;
1492 atomic_t nr_async_bios
;
1493 atomic_t async_delalloc_pages
;
1494 atomic_t open_ioctl_trans
;
1497 * this is used to protect the following list -- ordered_roots.
1499 spinlock_t ordered_root_lock
;
1502 * all fs/file tree roots in which there are data=ordered extents
1503 * pending writeback are added into this list.
1505 * these can span multiple transactions and basically include
1506 * every dirty data page that isn't from nodatacow
1508 struct list_head ordered_roots
;
1510 struct mutex delalloc_root_mutex
;
1511 spinlock_t delalloc_root_lock
;
1512 /* all fs/file tree roots that have delalloc inodes. */
1513 struct list_head delalloc_roots
;
1516 * there is a pool of worker threads for checksumming during writes
1517 * and a pool for checksumming after reads. This is because readers
1518 * can run with FS locks held, and the writers may be waiting for
1519 * those locks. We don't want ordering in the pending list to cause
1520 * deadlocks, and so the two are serviced separately.
1522 * A third pool does submit_bio to avoid deadlocking with the other
1525 struct btrfs_workqueue
*workers
;
1526 struct btrfs_workqueue
*delalloc_workers
;
1527 struct btrfs_workqueue
*flush_workers
;
1528 struct btrfs_workqueue
*endio_workers
;
1529 struct btrfs_workqueue
*endio_meta_workers
;
1530 struct btrfs_workqueue
*endio_raid56_workers
;
1531 struct btrfs_workqueue
*rmw_workers
;
1532 struct btrfs_workqueue
*endio_meta_write_workers
;
1533 struct btrfs_workqueue
*endio_write_workers
;
1534 struct btrfs_workqueue
*endio_freespace_worker
;
1535 struct btrfs_workqueue
*submit_workers
;
1536 struct btrfs_workqueue
*caching_workers
;
1537 struct btrfs_workqueue
*readahead_workers
;
1540 * fixup workers take dirty pages that didn't properly go through
1541 * the cow mechanism and make them safe to write. It happens
1542 * for the sys_munmap function call path
1544 struct btrfs_workqueue
*fixup_workers
;
1545 struct btrfs_workqueue
*delayed_workers
;
1546 struct task_struct
*transaction_kthread
;
1547 struct task_struct
*cleaner_kthread
;
1548 int thread_pool_size
;
1550 struct kobject super_kobj
;
1551 struct kobject
*space_info_kobj
;
1552 struct kobject
*device_dir_kobj
;
1553 struct completion kobj_unregister
;
1556 int log_root_recovering
;
1560 /* used to keep from writing metadata until there is a nice batch */
1561 struct percpu_counter dirty_metadata_bytes
;
1562 struct percpu_counter delalloc_bytes
;
1563 s32 dirty_metadata_batch
;
1566 struct list_head dirty_cowonly_roots
;
1568 struct btrfs_fs_devices
*fs_devices
;
1571 * the space_info list is almost entirely read only. It only changes
1572 * when we add a new raid type to the FS, and that happens
1573 * very rarely. RCU is used to protect it.
1575 struct list_head space_info
;
1577 struct btrfs_space_info
*data_sinfo
;
1579 struct reloc_control
*reloc_ctl
;
1581 /* data_alloc_cluster is only used in ssd mode */
1582 struct btrfs_free_cluster data_alloc_cluster
;
1584 /* all metadata allocations go through this cluster */
1585 struct btrfs_free_cluster meta_alloc_cluster
;
1587 /* auto defrag inodes go here */
1588 spinlock_t defrag_inodes_lock
;
1589 struct rb_root defrag_inodes
;
1590 atomic_t defrag_running
;
1592 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1593 seqlock_t profiles_lock
;
1595 * these three are in extended format (availability of single
1596 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1597 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1599 u64 avail_data_alloc_bits
;
1600 u64 avail_metadata_alloc_bits
;
1601 u64 avail_system_alloc_bits
;
1603 /* restriper state */
1604 spinlock_t balance_lock
;
1605 struct mutex balance_mutex
;
1606 atomic_t balance_running
;
1607 atomic_t balance_pause_req
;
1608 atomic_t balance_cancel_req
;
1609 struct btrfs_balance_control
*balance_ctl
;
1610 wait_queue_head_t balance_wait_q
;
1612 unsigned data_chunk_allocations
;
1613 unsigned metadata_ratio
;
1617 /* private scrub information */
1618 struct mutex scrub_lock
;
1619 atomic_t scrubs_running
;
1620 atomic_t scrub_pause_req
;
1621 atomic_t scrubs_paused
;
1622 atomic_t scrub_cancel_req
;
1623 wait_queue_head_t scrub_pause_wait
;
1624 int scrub_workers_refcnt
;
1625 struct btrfs_workqueue
*scrub_workers
;
1626 struct btrfs_workqueue
*scrub_wr_completion_workers
;
1627 struct btrfs_workqueue
*scrub_nocow_workers
;
1629 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1630 u32 check_integrity_print_mask
;
1635 unsigned int quota_enabled
:1;
1638 * quota_enabled only changes state after a commit. This holds the
1641 unsigned int pending_quota_state
:1;
1643 /* is qgroup tracking in a consistent state? */
1646 /* holds configuration and tracking. Protected by qgroup_lock */
1647 struct rb_root qgroup_tree
;
1648 spinlock_t qgroup_lock
;
1651 * used to avoid frequently calling ulist_alloc()/ulist_free()
1652 * when doing qgroup accounting, it must be protected by qgroup_lock.
1654 struct ulist
*qgroup_ulist
;
1656 /* protect user change for quota operations */
1657 struct mutex qgroup_ioctl_lock
;
1659 /* list of dirty qgroups to be written at next commit */
1660 struct list_head dirty_qgroups
;
1662 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1665 /* qgroup rescan items */
1666 struct mutex qgroup_rescan_lock
; /* protects the progress item */
1667 struct btrfs_key qgroup_rescan_progress
;
1668 struct btrfs_workqueue
*qgroup_rescan_workers
;
1669 struct completion qgroup_rescan_completion
;
1670 struct btrfs_work qgroup_rescan_work
;
1672 /* filesystem state */
1673 unsigned long fs_state
;
1675 struct btrfs_delayed_root
*delayed_root
;
1677 /* readahead tree */
1678 spinlock_t reada_lock
;
1679 struct radix_tree_root reada_tree
;
1681 /* Extent buffer radix tree */
1682 spinlock_t buffer_lock
;
1683 struct radix_tree_root buffer_radix
;
1685 /* next backup root to be overwritten */
1686 int backup_root_index
;
1688 int num_tolerated_disk_barrier_failures
;
1690 /* device replace state */
1691 struct btrfs_dev_replace dev_replace
;
1693 atomic_t mutually_exclusive_operation_running
;
1695 struct percpu_counter bio_counter
;
1696 wait_queue_head_t replace_wait
;
1698 struct semaphore uuid_tree_rescan_sem
;
1699 unsigned int update_uuid_tree_gen
:1;
1702 struct btrfs_subvolume_writers
{
1703 struct percpu_counter counter
;
1704 wait_queue_head_t wait
;
1708 * in ram representation of the tree. extent_root is used for all allocations
1709 * and for the extent tree extent_root root.
1712 struct extent_buffer
*node
;
1714 struct extent_buffer
*commit_root
;
1715 struct btrfs_root
*log_root
;
1716 struct btrfs_root
*reloc_root
;
1718 struct btrfs_root_item root_item
;
1719 struct btrfs_key root_key
;
1720 struct btrfs_fs_info
*fs_info
;
1721 struct extent_io_tree dirty_log_pages
;
1723 struct kobject root_kobj
;
1724 struct completion kobj_unregister
;
1725 struct mutex objectid_mutex
;
1727 spinlock_t accounting_lock
;
1728 struct btrfs_block_rsv
*block_rsv
;
1730 /* free ino cache stuff */
1731 struct btrfs_free_space_ctl
*free_ino_ctl
;
1732 enum btrfs_caching_type cached
;
1733 spinlock_t cache_lock
;
1734 wait_queue_head_t cache_wait
;
1735 struct btrfs_free_space_ctl
*free_ino_pinned
;
1737 struct inode
*cache_inode
;
1739 struct mutex log_mutex
;
1740 wait_queue_head_t log_writer_wait
;
1741 wait_queue_head_t log_commit_wait
[2];
1742 struct list_head log_ctxs
[2];
1743 atomic_t log_writers
;
1744 atomic_t log_commit
[2];
1747 /* No matter the commit succeeds or not*/
1748 int log_transid_committed
;
1749 /* Just be updated when the commit succeeds. */
1750 int last_log_commit
;
1751 pid_t log_start_pid
;
1752 bool log_multiple_pids
;
1757 /* data allocations are done in sectorsize units */
1760 /* node allocations are done in nodesize units */
1763 /* leaf allocations are done in leafsize units */
1770 u64 highest_objectid
;
1772 /* btrfs_record_root_in_trans is a multi-step process,
1773 * and it can race with the balancing code. But the
1774 * race is very small, and only the first time the root
1775 * is added to each transaction. So in_trans_setup
1776 * is used to tell us when more checks are required
1778 unsigned long in_trans_setup
;
1782 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1785 u64 defrag_trans_start
;
1786 struct btrfs_key defrag_progress
;
1787 struct btrfs_key defrag_max
;
1791 /* the dirty list is only used by non-reference counted roots */
1792 struct list_head dirty_list
;
1794 struct list_head root_list
;
1796 spinlock_t log_extents_lock
[2];
1797 struct list_head logged_list
[2];
1799 spinlock_t orphan_lock
;
1800 atomic_t orphan_inodes
;
1801 struct btrfs_block_rsv
*orphan_block_rsv
;
1802 int orphan_item_inserted
;
1803 int orphan_cleanup_state
;
1805 spinlock_t inode_lock
;
1806 /* red-black tree that keeps track of in-memory inodes */
1807 struct rb_root inode_tree
;
1810 * radix tree that keeps track of delayed nodes of every inode,
1811 * protected by inode_lock
1813 struct radix_tree_root delayed_nodes_tree
;
1815 * right now this just gets used so that a root has its own devid
1816 * for stat. It may be used for more later
1822 spinlock_t root_item_lock
;
1825 struct mutex delalloc_mutex
;
1826 spinlock_t delalloc_lock
;
1828 * all of the inodes that have delalloc bytes. It is possible for
1829 * this list to be empty even when there is still dirty data=ordered
1830 * extents waiting to finish IO.
1832 struct list_head delalloc_inodes
;
1833 struct list_head delalloc_root
;
1834 u64 nr_delalloc_inodes
;
1836 struct mutex ordered_extent_mutex
;
1838 * this is used by the balancing code to wait for all the pending
1841 spinlock_t ordered_extent_lock
;
1844 * all of the data=ordered extents pending writeback
1845 * these can span multiple transactions and basically include
1846 * every dirty data page that isn't from nodatacow
1848 struct list_head ordered_extents
;
1849 struct list_head ordered_root
;
1850 u64 nr_ordered_extents
;
1853 * Number of currently running SEND ioctls to prevent
1854 * manipulation with the read-only status via SUBVOL_SETFLAGS
1856 int send_in_progress
;
1857 struct btrfs_subvolume_writers
*subv_writers
;
1858 atomic_t will_be_snapshoted
;
1861 struct btrfs_ioctl_defrag_range_args
{
1862 /* start of the defrag operation */
1865 /* number of bytes to defrag, use (u64)-1 to say all */
1869 * flags for the operation, which can include turning
1870 * on compression for this one defrag
1875 * any extent bigger than this will be considered
1876 * already defragged. Use 0 to take the kernel default
1877 * Use 1 to say every single extent must be rewritten
1879 __u32 extent_thresh
;
1882 * which compression method to use if turning on compression
1883 * for this defrag operation. If unspecified, zlib will
1886 __u32 compress_type
;
1888 /* spare for later */
1894 * inode items have the data typically returned from stat and store other
1895 * info about object characteristics. There is one for every file and dir in
1898 #define BTRFS_INODE_ITEM_KEY 1
1899 #define BTRFS_INODE_REF_KEY 12
1900 #define BTRFS_INODE_EXTREF_KEY 13
1901 #define BTRFS_XATTR_ITEM_KEY 24
1902 #define BTRFS_ORPHAN_ITEM_KEY 48
1903 /* reserve 2-15 close to the inode for later flexibility */
1906 * dir items are the name -> inode pointers in a directory. There is one
1907 * for every name in a directory.
1909 #define BTRFS_DIR_LOG_ITEM_KEY 60
1910 #define BTRFS_DIR_LOG_INDEX_KEY 72
1911 #define BTRFS_DIR_ITEM_KEY 84
1912 #define BTRFS_DIR_INDEX_KEY 96
1914 * extent data is for file data
1916 #define BTRFS_EXTENT_DATA_KEY 108
1919 * extent csums are stored in a separate tree and hold csums for
1920 * an entire extent on disk.
1922 #define BTRFS_EXTENT_CSUM_KEY 128
1925 * root items point to tree roots. They are typically in the root
1926 * tree used by the super block to find all the other trees
1928 #define BTRFS_ROOT_ITEM_KEY 132
1931 * root backrefs tie subvols and snapshots to the directory entries that
1934 #define BTRFS_ROOT_BACKREF_KEY 144
1937 * root refs make a fast index for listing all of the snapshots and
1938 * subvolumes referenced by a given root. They point directly to the
1939 * directory item in the root that references the subvol
1941 #define BTRFS_ROOT_REF_KEY 156
1944 * extent items are in the extent map tree. These record which blocks
1945 * are used, and how many references there are to each block
1947 #define BTRFS_EXTENT_ITEM_KEY 168
1950 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1951 * the length, so we save the level in key->offset instead of the length.
1953 #define BTRFS_METADATA_ITEM_KEY 169
1955 #define BTRFS_TREE_BLOCK_REF_KEY 176
1957 #define BTRFS_EXTENT_DATA_REF_KEY 178
1959 #define BTRFS_EXTENT_REF_V0_KEY 180
1961 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1963 #define BTRFS_SHARED_DATA_REF_KEY 184
1966 * block groups give us hints into the extent allocation trees. Which
1967 * blocks are free etc etc
1969 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1971 #define BTRFS_DEV_EXTENT_KEY 204
1972 #define BTRFS_DEV_ITEM_KEY 216
1973 #define BTRFS_CHUNK_ITEM_KEY 228
1976 * Records the overall state of the qgroups.
1977 * There's only one instance of this key present,
1978 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1980 #define BTRFS_QGROUP_STATUS_KEY 240
1982 * Records the currently used space of the qgroup.
1983 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1985 #define BTRFS_QGROUP_INFO_KEY 242
1987 * Contains the user configured limits for the qgroup.
1988 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1990 #define BTRFS_QGROUP_LIMIT_KEY 244
1992 * Records the child-parent relationship of qgroups. For
1993 * each relation, 2 keys are present:
1994 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1995 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1997 #define BTRFS_QGROUP_RELATION_KEY 246
1999 #define BTRFS_BALANCE_ITEM_KEY 248
2002 * Persistantly stores the io stats in the device tree.
2003 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
2005 #define BTRFS_DEV_STATS_KEY 249
2008 * Persistantly stores the device replace state in the device tree.
2009 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
2011 #define BTRFS_DEV_REPLACE_KEY 250
2014 * Stores items that allow to quickly map UUIDs to something else.
2015 * These items are part of the filesystem UUID tree.
2016 * The key is built like this:
2017 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
2019 #if BTRFS_UUID_SIZE != 16
2020 #error "UUID items require BTRFS_UUID_SIZE == 16!"
2022 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
2023 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
2024 * received subvols */
2027 * string items are for debugging. They just store a short string of
2030 #define BTRFS_STRING_ITEM_KEY 253
2033 * Flags for mount options.
2035 * Note: don't forget to add new options to btrfs_show_options()
2037 #define BTRFS_MOUNT_NODATASUM (1 << 0)
2038 #define BTRFS_MOUNT_NODATACOW (1 << 1)
2039 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
2040 #define BTRFS_MOUNT_SSD (1 << 3)
2041 #define BTRFS_MOUNT_DEGRADED (1 << 4)
2042 #define BTRFS_MOUNT_COMPRESS (1 << 5)
2043 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
2044 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
2045 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
2046 #define BTRFS_MOUNT_NOSSD (1 << 9)
2047 #define BTRFS_MOUNT_DISCARD (1 << 10)
2048 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
2049 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2050 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2051 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2052 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2053 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2054 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2055 #define BTRFS_MOUNT_RECOVERY (1 << 18)
2056 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2057 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2058 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2059 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2060 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2061 #define BTRFS_MOUNT_CHANGE_INODE_CACHE (1 << 24)
2063 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2065 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2066 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2067 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2068 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2070 #define btrfs_set_and_info(root, opt, fmt, args...) \
2072 if (!btrfs_test_opt(root, opt)) \
2073 btrfs_info(root->fs_info, fmt, ##args); \
2074 btrfs_set_opt(root->fs_info->mount_opt, opt); \
2077 #define btrfs_clear_and_info(root, opt, fmt, args...) \
2079 if (btrfs_test_opt(root, opt)) \
2080 btrfs_info(root->fs_info, fmt, ##args); \
2081 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
2087 #define BTRFS_INODE_NODATASUM (1 << 0)
2088 #define BTRFS_INODE_NODATACOW (1 << 1)
2089 #define BTRFS_INODE_READONLY (1 << 2)
2090 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2091 #define BTRFS_INODE_PREALLOC (1 << 4)
2092 #define BTRFS_INODE_SYNC (1 << 5)
2093 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2094 #define BTRFS_INODE_APPEND (1 << 7)
2095 #define BTRFS_INODE_NODUMP (1 << 8)
2096 #define BTRFS_INODE_NOATIME (1 << 9)
2097 #define BTRFS_INODE_DIRSYNC (1 << 10)
2098 #define BTRFS_INODE_COMPRESS (1 << 11)
2100 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2102 struct btrfs_map_token
{
2103 struct extent_buffer
*eb
;
2105 unsigned long offset
;
2108 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
2110 token
->kaddr
= NULL
;
2113 /* some macros to generate set/get funcs for the struct fields. This
2114 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2117 #define le8_to_cpu(v) (v)
2118 #define cpu_to_le8(v) (v)
2121 #define read_eb_member(eb, ptr, type, member, result) ( \
2122 read_extent_buffer(eb, (char *)(result), \
2123 ((unsigned long)(ptr)) + \
2124 offsetof(type, member), \
2125 sizeof(((type *)0)->member)))
2127 #define write_eb_member(eb, ptr, type, member, result) ( \
2128 write_extent_buffer(eb, (char *)(result), \
2129 ((unsigned long)(ptr)) + \
2130 offsetof(type, member), \
2131 sizeof(((type *)0)->member)))
2133 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2134 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2135 unsigned long off, \
2136 struct btrfs_map_token *token); \
2137 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2138 unsigned long off, u##bits val, \
2139 struct btrfs_map_token *token); \
2140 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2141 unsigned long off) \
2143 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2145 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2146 unsigned long off, u##bits val) \
2148 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2151 DECLARE_BTRFS_SETGET_BITS(8)
2152 DECLARE_BTRFS_SETGET_BITS(16)
2153 DECLARE_BTRFS_SETGET_BITS(32)
2154 DECLARE_BTRFS_SETGET_BITS(64)
2156 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2157 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2159 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2160 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2162 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2165 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2166 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2168 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2169 struct btrfs_map_token *token) \
2171 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2172 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2174 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2175 type *s, u##bits val, \
2176 struct btrfs_map_token *token) \
2178 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2179 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2182 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2183 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2185 type *p = page_address(eb->pages[0]); \
2186 u##bits res = le##bits##_to_cpu(p->member); \
2189 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2192 type *p = page_address(eb->pages[0]); \
2193 p->member = cpu_to_le##bits(val); \
2196 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2197 static inline u##bits btrfs_##name(type *s) \
2199 return le##bits##_to_cpu(s->member); \
2201 static inline void btrfs_set_##name(type *s, u##bits val) \
2203 s->member = cpu_to_le##bits(val); \
2206 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
2207 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
2208 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
2209 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
2210 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
2211 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
2213 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
2214 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
2215 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
2216 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
2217 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
2218 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
2220 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
2221 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
2223 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
2225 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
2227 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
2229 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
2231 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
2232 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
2234 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
2236 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
2238 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
2241 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
2243 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
2246 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
2248 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
2251 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
2252 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
2253 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
2254 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
2255 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
2256 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
2257 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
2258 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
2259 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
2260 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
2261 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
2263 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
2265 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
2268 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
2269 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
2270 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
2272 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
2274 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
2276 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
2278 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
2279 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
2281 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
2283 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
2284 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
2286 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
2289 unsigned long offset
= (unsigned long)c
;
2290 offset
+= offsetof(struct btrfs_chunk
, stripe
);
2291 offset
+= nr
* sizeof(struct btrfs_stripe
);
2292 return (struct btrfs_stripe
*)offset
;
2295 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
2297 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
2300 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
2301 struct btrfs_chunk
*c
, int nr
)
2303 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
2306 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
2307 struct btrfs_chunk
*c
, int nr
)
2309 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
2312 /* struct btrfs_block_group_item */
2313 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
2315 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
2317 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
2318 struct btrfs_block_group_item
, chunk_objectid
, 64);
2320 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
2321 struct btrfs_block_group_item
, chunk_objectid
, 64);
2322 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
2323 struct btrfs_block_group_item
, flags
, 64);
2324 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
2325 struct btrfs_block_group_item
, flags
, 64);
2327 /* struct btrfs_inode_ref */
2328 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
2329 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
2331 /* struct btrfs_inode_extref */
2332 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
2333 parent_objectid
, 64);
2334 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
2336 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
2338 /* struct btrfs_inode_item */
2339 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
2340 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
2341 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
2342 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
2343 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
2344 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
2345 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2346 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
2347 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
2348 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
2349 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2350 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
2351 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
2353 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
2355 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
2357 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
2358 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
2360 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
2362 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2363 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
2364 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
2365 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
2366 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2367 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
2369 static inline struct btrfs_timespec
*
2370 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
2372 unsigned long ptr
= (unsigned long)inode_item
;
2373 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
2374 return (struct btrfs_timespec
*)ptr
;
2377 static inline struct btrfs_timespec
*
2378 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
2380 unsigned long ptr
= (unsigned long)inode_item
;
2381 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
2382 return (struct btrfs_timespec
*)ptr
;
2385 static inline struct btrfs_timespec
*
2386 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
2388 unsigned long ptr
= (unsigned long)inode_item
;
2389 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
2390 return (struct btrfs_timespec
*)ptr
;
2393 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
2394 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2395 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
2396 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2398 /* struct btrfs_dev_extent */
2399 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
2401 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
2402 chunk_objectid
, 64);
2403 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
2405 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
2407 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
2409 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
2410 return (unsigned long)dev
+ ptr
;
2413 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
2414 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
2416 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
2418 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
2421 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
2423 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
2424 struct btrfs_tree_block_info
*item
,
2425 struct btrfs_disk_key
*key
)
2427 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2430 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
2431 struct btrfs_tree_block_info
*item
,
2432 struct btrfs_disk_key
*key
)
2434 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2437 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
2439 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
2441 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
2443 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
2446 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
2449 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
2451 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
2454 static inline u32
btrfs_extent_inline_ref_size(int type
)
2456 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
2457 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
2458 return sizeof(struct btrfs_extent_inline_ref
);
2459 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
2460 return sizeof(struct btrfs_shared_data_ref
) +
2461 sizeof(struct btrfs_extent_inline_ref
);
2462 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
2463 return sizeof(struct btrfs_extent_data_ref
) +
2464 offsetof(struct btrfs_extent_inline_ref
, offset
);
2469 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
2470 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
2472 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
2473 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
2475 /* struct btrfs_node */
2476 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
2477 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
2478 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
2480 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
2483 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
2486 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2487 sizeof(struct btrfs_key_ptr
) * nr
;
2488 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
2491 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
2495 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2496 sizeof(struct btrfs_key_ptr
) * nr
;
2497 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2500 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
2503 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2504 sizeof(struct btrfs_key_ptr
) * nr
;
2505 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
2508 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
2512 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2513 sizeof(struct btrfs_key_ptr
) * nr
;
2514 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2517 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
2519 return offsetof(struct btrfs_node
, ptrs
) +
2520 sizeof(struct btrfs_key_ptr
) * nr
;
2523 void btrfs_node_key(struct extent_buffer
*eb
,
2524 struct btrfs_disk_key
*disk_key
, int nr
);
2526 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
2527 struct btrfs_disk_key
*disk_key
, int nr
)
2530 ptr
= btrfs_node_key_ptr_offset(nr
);
2531 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
2532 struct btrfs_key_ptr
, key
, disk_key
);
2535 /* struct btrfs_item */
2536 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
2537 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
2538 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
2539 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
2541 static inline unsigned long btrfs_item_nr_offset(int nr
)
2543 return offsetof(struct btrfs_leaf
, items
) +
2544 sizeof(struct btrfs_item
) * nr
;
2547 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
2549 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
2552 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
2553 struct btrfs_item
*item
)
2555 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
2558 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
2560 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
2563 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
2565 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
2568 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
2570 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
2573 static inline void btrfs_item_key(struct extent_buffer
*eb
,
2574 struct btrfs_disk_key
*disk_key
, int nr
)
2576 struct btrfs_item
*item
= btrfs_item_nr(nr
);
2577 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2580 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
2581 struct btrfs_disk_key
*disk_key
, int nr
)
2583 struct btrfs_item
*item
= btrfs_item_nr(nr
);
2584 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2587 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
2590 * struct btrfs_root_ref
2592 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
2593 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
2594 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
2596 /* struct btrfs_dir_item */
2597 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2598 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2599 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2600 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2601 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
2602 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
2604 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
2606 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
2609 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
2610 struct btrfs_dir_item
*item
,
2611 struct btrfs_disk_key
*key
)
2613 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2616 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2617 struct btrfs_dir_item
*item
,
2618 struct btrfs_disk_key
*key
)
2620 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2623 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2625 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2627 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2630 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
2631 struct btrfs_free_space_header
*h
,
2632 struct btrfs_disk_key
*key
)
2634 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2637 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2638 struct btrfs_free_space_header
*h
,
2639 struct btrfs_disk_key
*key
)
2641 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2644 /* struct btrfs_disk_key */
2645 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2647 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2648 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2650 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2651 struct btrfs_disk_key
*disk
)
2653 cpu
->offset
= le64_to_cpu(disk
->offset
);
2654 cpu
->type
= disk
->type
;
2655 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2658 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2659 struct btrfs_key
*cpu
)
2661 disk
->offset
= cpu_to_le64(cpu
->offset
);
2662 disk
->type
= cpu
->type
;
2663 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2666 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2667 struct btrfs_key
*key
, int nr
)
2669 struct btrfs_disk_key disk_key
;
2670 btrfs_node_key(eb
, &disk_key
, nr
);
2671 btrfs_disk_key_to_cpu(key
, &disk_key
);
2674 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2675 struct btrfs_key
*key
, int nr
)
2677 struct btrfs_disk_key disk_key
;
2678 btrfs_item_key(eb
, &disk_key
, nr
);
2679 btrfs_disk_key_to_cpu(key
, &disk_key
);
2682 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2683 struct btrfs_dir_item
*item
,
2684 struct btrfs_key
*key
)
2686 struct btrfs_disk_key disk_key
;
2687 btrfs_dir_item_key(eb
, item
, &disk_key
);
2688 btrfs_disk_key_to_cpu(key
, &disk_key
);
2692 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2697 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2702 /* struct btrfs_header */
2703 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2704 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2706 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2707 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2708 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2709 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2710 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
2712 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
2713 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
2715 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
2717 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2719 return (btrfs_header_flags(eb
) & flag
) == flag
;
2722 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2724 u64 flags
= btrfs_header_flags(eb
);
2725 btrfs_set_header_flags(eb
, flags
| flag
);
2726 return (flags
& flag
) == flag
;
2729 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2731 u64 flags
= btrfs_header_flags(eb
);
2732 btrfs_set_header_flags(eb
, flags
& ~flag
);
2733 return (flags
& flag
) == flag
;
2736 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2738 u64 flags
= btrfs_header_flags(eb
);
2739 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2742 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2745 u64 flags
= btrfs_header_flags(eb
);
2746 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2747 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2748 btrfs_set_header_flags(eb
, flags
);
2751 static inline unsigned long btrfs_header_fsid(void)
2753 return offsetof(struct btrfs_header
, fsid
);
2756 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2758 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
2761 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2763 return btrfs_header_level(eb
) == 0;
2766 /* struct btrfs_root_item */
2767 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2769 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2770 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2771 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2773 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2775 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2776 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2777 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2778 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2779 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2780 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2781 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2782 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2784 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2786 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2788 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2790 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2792 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2795 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2797 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2800 static inline bool btrfs_root_dead(struct btrfs_root
*root
)
2802 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD
)) != 0;
2805 /* struct btrfs_root_backup */
2806 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2808 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2810 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2811 tree_root_level
, 8);
2813 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2815 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2816 chunk_root_gen
, 64);
2817 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2818 chunk_root_level
, 8);
2820 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2822 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2823 extent_root_gen
, 64);
2824 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2825 extent_root_level
, 8);
2827 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2829 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2831 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2834 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2836 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2838 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2841 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2843 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2845 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2846 csum_root_level
, 8);
2847 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2849 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2851 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2854 /* struct btrfs_balance_item */
2855 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2857 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2858 struct btrfs_balance_item
*bi
,
2859 struct btrfs_disk_balance_args
*ba
)
2861 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2864 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2865 struct btrfs_balance_item
*bi
,
2866 struct btrfs_disk_balance_args
*ba
)
2868 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2871 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2872 struct btrfs_balance_item
*bi
,
2873 struct btrfs_disk_balance_args
*ba
)
2875 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2878 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2879 struct btrfs_balance_item
*bi
,
2880 struct btrfs_disk_balance_args
*ba
)
2882 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2885 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2886 struct btrfs_balance_item
*bi
,
2887 struct btrfs_disk_balance_args
*ba
)
2889 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2892 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2893 struct btrfs_balance_item
*bi
,
2894 struct btrfs_disk_balance_args
*ba
)
2896 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2900 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2901 struct btrfs_disk_balance_args
*disk
)
2903 memset(cpu
, 0, sizeof(*cpu
));
2905 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2906 cpu
->usage
= le64_to_cpu(disk
->usage
);
2907 cpu
->devid
= le64_to_cpu(disk
->devid
);
2908 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2909 cpu
->pend
= le64_to_cpu(disk
->pend
);
2910 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2911 cpu
->vend
= le64_to_cpu(disk
->vend
);
2912 cpu
->target
= le64_to_cpu(disk
->target
);
2913 cpu
->flags
= le64_to_cpu(disk
->flags
);
2914 cpu
->limit
= le64_to_cpu(disk
->limit
);
2918 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2919 struct btrfs_balance_args
*cpu
)
2921 memset(disk
, 0, sizeof(*disk
));
2923 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2924 disk
->usage
= cpu_to_le64(cpu
->usage
);
2925 disk
->devid
= cpu_to_le64(cpu
->devid
);
2926 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2927 disk
->pend
= cpu_to_le64(cpu
->pend
);
2928 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2929 disk
->vend
= cpu_to_le64(cpu
->vend
);
2930 disk
->target
= cpu_to_le64(cpu
->target
);
2931 disk
->flags
= cpu_to_le64(cpu
->flags
);
2932 disk
->limit
= cpu_to_le64(cpu
->limit
);
2935 /* struct btrfs_super_block */
2936 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2937 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2938 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2940 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2941 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2942 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2943 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2944 struct btrfs_super_block
, chunk_root_generation
, 64);
2945 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2947 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2949 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2950 chunk_root_level
, 8);
2951 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2953 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2954 log_root_transid
, 64);
2955 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2957 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2959 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2961 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2963 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2965 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2967 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2969 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2970 root_dir_objectid
, 64);
2971 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2973 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2975 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2976 compat_ro_flags
, 64);
2977 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2978 incompat_flags
, 64);
2979 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2981 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2982 cache_generation
, 64);
2983 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2984 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2985 uuid_tree_generation
, 64);
2987 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2989 u16 t
= btrfs_super_csum_type(s
);
2991 * csum type is validated at mount time
2993 return btrfs_csum_sizes
[t
];
2996 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2998 return offsetof(struct btrfs_leaf
, items
);
3001 /* struct btrfs_file_extent_item */
3002 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
3003 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
3004 struct btrfs_file_extent_item
, disk_bytenr
, 64);
3005 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
3006 struct btrfs_file_extent_item
, offset
, 64);
3007 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
3008 struct btrfs_file_extent_item
, generation
, 64);
3009 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
3010 struct btrfs_file_extent_item
, num_bytes
, 64);
3011 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
3012 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
3013 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
3014 struct btrfs_file_extent_item
, compression
, 8);
3016 static inline unsigned long
3017 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
3019 unsigned long offset
= (unsigned long)e
;
3020 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
3024 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
3026 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
3029 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
3031 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
3033 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
3034 disk_num_bytes
, 64);
3035 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
3037 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
3039 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
3041 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
3043 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
3045 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
3046 other_encoding
, 16);
3049 * this returns the number of bytes used by the item on disk, minus the
3050 * size of any extent headers. If a file is compressed on disk, this is
3051 * the compressed size
3053 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
3054 struct btrfs_item
*e
)
3056 unsigned long offset
;
3057 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
3058 return btrfs_item_size(eb
, e
) - offset
;
3061 /* this returns the number of file bytes represented by the inline item.
3062 * If an item is compressed, this is the uncompressed size
3064 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
3066 struct btrfs_file_extent_item
*fi
)
3068 struct btrfs_map_token token
;
3070 btrfs_init_map_token(&token
);
3072 * return the space used on disk if this item isn't
3073 * compressed or encoded
3075 if (btrfs_token_file_extent_compression(eb
, fi
, &token
) == 0 &&
3076 btrfs_token_file_extent_encryption(eb
, fi
, &token
) == 0 &&
3077 btrfs_token_file_extent_other_encoding(eb
, fi
, &token
) == 0) {
3078 return btrfs_file_extent_inline_item_len(eb
,
3079 btrfs_item_nr(slot
));
3082 /* otherwise use the ram bytes field */
3083 return btrfs_token_file_extent_ram_bytes(eb
, fi
, &token
);
3087 /* btrfs_dev_stats_item */
3088 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
3089 struct btrfs_dev_stats_item
*ptr
,
3094 read_extent_buffer(eb
, &val
,
3095 offsetof(struct btrfs_dev_stats_item
, values
) +
3096 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
3101 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
3102 struct btrfs_dev_stats_item
*ptr
,
3105 write_extent_buffer(eb
, &val
,
3106 offsetof(struct btrfs_dev_stats_item
, values
) +
3107 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
3111 /* btrfs_qgroup_status_item */
3112 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
3114 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
3116 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
3118 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
3121 /* btrfs_qgroup_info_item */
3122 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
3124 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
3125 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
3127 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
3128 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
3131 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
3132 struct btrfs_qgroup_info_item
, generation
, 64);
3133 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
3135 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
3136 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
3137 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
3139 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
3140 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
3142 /* btrfs_qgroup_limit_item */
3143 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
3145 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
3147 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
3149 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
3151 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
3154 /* btrfs_dev_replace_item */
3155 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
3156 struct btrfs_dev_replace_item
, src_devid
, 64);
3157 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
3158 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
3160 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
3162 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
3164 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
3166 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
3167 num_write_errors
, 64);
3168 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
3169 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
3171 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
3173 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
3176 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
3177 struct btrfs_dev_replace_item
, src_devid
, 64);
3178 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
3179 struct btrfs_dev_replace_item
,
3180 cont_reading_from_srcdev_mode
, 64);
3181 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
3182 struct btrfs_dev_replace_item
, replace_state
, 64);
3183 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
3184 struct btrfs_dev_replace_item
, time_started
, 64);
3185 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
3186 struct btrfs_dev_replace_item
, time_stopped
, 64);
3187 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
3188 struct btrfs_dev_replace_item
, num_write_errors
, 64);
3189 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
3190 struct btrfs_dev_replace_item
,
3191 num_uncorrectable_read_errors
, 64);
3192 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
3193 struct btrfs_dev_replace_item
, cursor_left
, 64);
3194 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
3195 struct btrfs_dev_replace_item
, cursor_right
, 64);
3197 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
3199 return sb
->s_fs_info
;
3202 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
3205 return root
->leafsize
;
3206 return root
->nodesize
;
3209 /* helper function to cast into the data area of the leaf. */
3210 #define btrfs_item_ptr(leaf, slot, type) \
3211 ((type *)(btrfs_leaf_data(leaf) + \
3212 btrfs_item_offset_nr(leaf, slot)))
3214 #define btrfs_item_ptr_offset(leaf, slot) \
3215 ((unsigned long)(btrfs_leaf_data(leaf) + \
3216 btrfs_item_offset_nr(leaf, slot)))
3218 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
3220 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
3221 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
3224 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
3226 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
3230 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
3233 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
3238 * Doing a truncate won't result in new nodes or leaves, just what we need for
3241 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
3244 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
3248 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle
*trans
,
3249 struct btrfs_root
*root
);
3250 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle
*trans
,
3251 struct btrfs_root
*root
);
3252 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
3253 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
3254 struct btrfs_root
*root
, unsigned long count
);
3255 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
3256 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
3257 struct btrfs_root
*root
, u64 bytenr
,
3258 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
3259 int btrfs_pin_extent(struct btrfs_root
*root
,
3260 u64 bytenr
, u64 num
, int reserved
);
3261 int btrfs_pin_extent_for_log_replay(struct btrfs_root
*root
,
3262 u64 bytenr
, u64 num_bytes
);
3263 int btrfs_exclude_logged_extents(struct btrfs_root
*root
,
3264 struct extent_buffer
*eb
);
3265 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
3266 struct btrfs_root
*root
,
3267 u64 objectid
, u64 offset
, u64 bytenr
);
3268 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
3269 struct btrfs_fs_info
*info
,
3271 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
3272 int get_block_group_index(struct btrfs_block_group_cache
*cache
);
3273 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
3274 struct btrfs_root
*root
, u32 blocksize
,
3275 u64 parent
, u64 root_objectid
,
3276 struct btrfs_disk_key
*key
, int level
,
3277 u64 hint
, u64 empty_size
);
3278 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
3279 struct btrfs_root
*root
,
3280 struct extent_buffer
*buf
,
3281 u64 parent
, int last_ref
);
3282 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
3283 struct btrfs_root
*root
,
3284 u64 root_objectid
, u64 owner
,
3285 u64 offset
, struct btrfs_key
*ins
);
3286 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
3287 struct btrfs_root
*root
,
3288 u64 root_objectid
, u64 owner
, u64 offset
,
3289 struct btrfs_key
*ins
);
3290 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 num_bytes
,
3291 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
3292 struct btrfs_key
*ins
, int is_data
);
3293 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3294 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
3295 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3296 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
3297 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
3298 struct btrfs_root
*root
,
3299 u64 bytenr
, u64 num_bytes
, u64 flags
,
3300 int level
, int is_data
);
3301 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
3302 struct btrfs_root
*root
,
3303 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
3304 u64 owner
, u64 offset
, int for_cow
);
3306 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
3307 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
3308 u64 start
, u64 len
);
3309 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
3310 struct btrfs_root
*root
);
3311 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
3312 struct btrfs_root
*root
);
3313 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
3314 struct btrfs_root
*root
,
3315 u64 bytenr
, u64 num_bytes
, u64 parent
,
3316 u64 root_objectid
, u64 owner
, u64 offset
, int for_cow
);
3318 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
3319 struct btrfs_root
*root
);
3320 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
3321 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
3322 int btrfs_read_block_groups(struct btrfs_root
*root
);
3323 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
3324 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
3325 struct btrfs_root
*root
, u64 bytes_used
,
3326 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
3328 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
3329 struct btrfs_root
*root
, u64 group_start
);
3330 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
3331 struct btrfs_root
*root
);
3332 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
3333 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
3335 enum btrfs_reserve_flush_enum
{
3336 /* If we are in the transaction, we can't flush anything.*/
3337 BTRFS_RESERVE_NO_FLUSH
,
3339 * Flushing delalloc may cause deadlock somewhere, in this
3340 * case, use FLUSH LIMIT
3342 BTRFS_RESERVE_FLUSH_LIMIT
,
3343 BTRFS_RESERVE_FLUSH_ALL
,
3346 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
3347 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
3348 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
3349 struct btrfs_root
*root
);
3350 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
3351 struct inode
*inode
);
3352 void btrfs_orphan_release_metadata(struct inode
*inode
);
3353 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
3354 struct btrfs_block_rsv
*rsv
,
3356 u64
*qgroup_reserved
, bool use_global_rsv
);
3357 void btrfs_subvolume_release_metadata(struct btrfs_root
*root
,
3358 struct btrfs_block_rsv
*rsv
,
3359 u64 qgroup_reserved
);
3360 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
3361 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
3362 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
3363 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
3364 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
3365 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
3366 unsigned short type
);
3367 void btrfs_free_block_rsv(struct btrfs_root
*root
,
3368 struct btrfs_block_rsv
*rsv
);
3369 int btrfs_block_rsv_add(struct btrfs_root
*root
,
3370 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
3371 enum btrfs_reserve_flush_enum flush
);
3372 int btrfs_block_rsv_check(struct btrfs_root
*root
,
3373 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
3374 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
3375 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
3376 enum btrfs_reserve_flush_enum flush
);
3377 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
3378 struct btrfs_block_rsv
*dst_rsv
,
3380 int btrfs_cond_migrate_bytes(struct btrfs_fs_info
*fs_info
,
3381 struct btrfs_block_rsv
*dest
, u64 num_bytes
,
3383 void btrfs_block_rsv_release(struct btrfs_root
*root
,
3384 struct btrfs_block_rsv
*block_rsv
,
3386 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
3387 struct btrfs_block_group_cache
*cache
);
3388 void btrfs_set_block_group_rw(struct btrfs_root
*root
,
3389 struct btrfs_block_group_cache
*cache
);
3390 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
3391 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
3392 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
3393 u64 start
, u64 end
);
3394 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
3395 u64 num_bytes
, u64
*actual_bytes
);
3396 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
3397 struct btrfs_root
*root
, u64 type
);
3398 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
3400 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
3401 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
3402 struct btrfs_fs_info
*fs_info
);
3403 int __get_raid_index(u64 flags
);
3405 int btrfs_start_nocow_write(struct btrfs_root
*root
);
3406 void btrfs_end_nocow_write(struct btrfs_root
*root
);
3408 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
3409 int level
, int *slot
);
3410 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
3411 int btrfs_previous_item(struct btrfs_root
*root
,
3412 struct btrfs_path
*path
, u64 min_objectid
,
3414 int btrfs_previous_extent_item(struct btrfs_root
*root
,
3415 struct btrfs_path
*path
, u64 min_objectid
);
3416 void btrfs_set_item_key_safe(struct btrfs_root
*root
, struct btrfs_path
*path
,
3417 struct btrfs_key
*new_key
);
3418 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
3419 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
3420 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
3421 struct btrfs_key
*key
, int lowest_level
,
3423 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
3424 struct btrfs_path
*path
,
3426 enum btrfs_compare_tree_result
{
3427 BTRFS_COMPARE_TREE_NEW
,
3428 BTRFS_COMPARE_TREE_DELETED
,
3429 BTRFS_COMPARE_TREE_CHANGED
,
3430 BTRFS_COMPARE_TREE_SAME
,
3432 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
3433 struct btrfs_root
*right_root
,
3434 struct btrfs_path
*left_path
,
3435 struct btrfs_path
*right_path
,
3436 struct btrfs_key
*key
,
3437 enum btrfs_compare_tree_result result
,
3439 int btrfs_compare_trees(struct btrfs_root
*left_root
,
3440 struct btrfs_root
*right_root
,
3441 btrfs_changed_cb_t cb
, void *ctx
);
3442 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
3443 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3444 struct extent_buffer
*parent
, int parent_slot
,
3445 struct extent_buffer
**cow_ret
);
3446 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
3447 struct btrfs_root
*root
,
3448 struct extent_buffer
*buf
,
3449 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
3450 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
3451 struct extent_buffer
*buf
);
3452 void btrfs_extend_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
3454 void btrfs_truncate_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
3455 u32 new_size
, int from_end
);
3456 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
3457 struct btrfs_root
*root
,
3458 struct btrfs_path
*path
,
3459 struct btrfs_key
*new_key
,
3460 unsigned long split_offset
);
3461 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
3462 struct btrfs_root
*root
,
3463 struct btrfs_path
*path
,
3464 struct btrfs_key
*new_key
);
3465 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*path
,
3466 u64 inum
, u64 ioff
, u8 key_type
, struct btrfs_key
*found_key
);
3467 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
3468 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
3470 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
3471 struct btrfs_path
*p
, u64 time_seq
);
3472 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
3473 struct btrfs_key
*key
, struct btrfs_path
*p
,
3474 int find_higher
, int return_any
);
3475 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
3476 struct btrfs_root
*root
, struct extent_buffer
*parent
,
3477 int start_slot
, u64
*last_ret
,
3478 struct btrfs_key
*progress
);
3479 void btrfs_release_path(struct btrfs_path
*p
);
3480 struct btrfs_path
*btrfs_alloc_path(void);
3481 void btrfs_free_path(struct btrfs_path
*p
);
3482 void btrfs_set_path_blocking(struct btrfs_path
*p
);
3483 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
3484 struct extent_buffer
*held
, int held_rw
);
3485 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
3487 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3488 struct btrfs_path
*path
, int slot
, int nr
);
3489 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
3490 struct btrfs_root
*root
,
3491 struct btrfs_path
*path
)
3493 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
3496 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
3497 struct btrfs_key
*cpu_key
, u32
*data_size
,
3498 u32 total_data
, u32 total_size
, int nr
);
3499 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
3500 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
3501 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
3502 struct btrfs_root
*root
,
3503 struct btrfs_path
*path
,
3504 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
3506 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
3507 struct btrfs_root
*root
,
3508 struct btrfs_path
*path
,
3509 struct btrfs_key
*key
,
3512 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
3515 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3516 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3517 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
3519 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
3520 struct btrfs_path
*p
, u64 time_seq
)
3523 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
3524 return btrfs_next_old_leaf(root
, p
, time_seq
);
3527 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
3529 return btrfs_next_old_item(root
, p
, 0);
3531 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
3532 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
3533 struct btrfs_block_rsv
*block_rsv
,
3534 int update_ref
, int for_reloc
);
3535 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
3536 struct btrfs_root
*root
,
3537 struct extent_buffer
*node
,
3538 struct extent_buffer
*parent
);
3539 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
3542 * Get synced with close_ctree()
3545 return fs_info
->closing
;
3549 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3550 * anything except sleeping. This function is used to check the status of
3553 static inline int btrfs_need_cleaner_sleep(struct btrfs_root
*root
)
3555 return (root
->fs_info
->sb
->s_flags
& MS_RDONLY
||
3556 btrfs_fs_closing(root
->fs_info
));
3559 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
3561 kfree(fs_info
->balance_ctl
);
3562 kfree(fs_info
->delayed_root
);
3563 kfree(fs_info
->extent_root
);
3564 kfree(fs_info
->tree_root
);
3565 kfree(fs_info
->chunk_root
);
3566 kfree(fs_info
->dev_root
);
3567 kfree(fs_info
->csum_root
);
3568 kfree(fs_info
->quota_root
);
3569 kfree(fs_info
->uuid_root
);
3570 kfree(fs_info
->super_copy
);
3571 kfree(fs_info
->super_for_commit
);
3575 /* tree mod log functions from ctree.c */
3576 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3577 struct seq_list
*elem
);
3578 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3579 struct seq_list
*elem
);
3580 u64
btrfs_tree_mod_seq_prev(u64 seq
);
3581 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
3584 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
3585 struct btrfs_path
*path
,
3586 u64 root_id
, u64 ref_id
);
3587 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
3588 struct btrfs_root
*tree_root
,
3589 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
3590 const char *name
, int name_len
);
3591 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
3592 struct btrfs_root
*tree_root
,
3593 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
3594 const char *name
, int name_len
);
3595 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3596 struct btrfs_key
*key
);
3597 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
3598 *root
, struct btrfs_key
*key
, struct btrfs_root_item
3600 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
3601 struct btrfs_root
*root
,
3602 struct btrfs_key
*key
,
3603 struct btrfs_root_item
*item
);
3604 int btrfs_find_root(struct btrfs_root
*root
, struct btrfs_key
*search_key
,
3605 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
3606 struct btrfs_key
*root_key
);
3607 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
3608 void btrfs_set_root_node(struct btrfs_root_item
*item
,
3609 struct extent_buffer
*node
);
3610 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
3611 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
3612 struct btrfs_root
*root
);
3615 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
,
3616 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
3618 int btrfs_uuid_tree_rem(struct btrfs_trans_handle
*trans
,
3619 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
3621 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
,
3622 int (*check_func
)(struct btrfs_fs_info
*, u8
*, u8
,
3626 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
3627 const char *name
, int name_len
);
3628 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
3629 struct btrfs_root
*root
, const char *name
,
3630 int name_len
, struct inode
*dir
,
3631 struct btrfs_key
*location
, u8 type
, u64 index
);
3632 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3633 struct btrfs_root
*root
,
3634 struct btrfs_path
*path
, u64 dir
,
3635 const char *name
, int name_len
,
3637 struct btrfs_dir_item
*
3638 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3639 struct btrfs_root
*root
,
3640 struct btrfs_path
*path
, u64 dir
,
3641 u64 objectid
, const char *name
, int name_len
,
3643 struct btrfs_dir_item
*
3644 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3645 struct btrfs_path
*path
, u64 dirid
,
3646 const char *name
, int name_len
);
3647 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3648 struct btrfs_root
*root
,
3649 struct btrfs_path
*path
,
3650 struct btrfs_dir_item
*di
);
3651 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3652 struct btrfs_root
*root
,
3653 struct btrfs_path
*path
, u64 objectid
,
3654 const char *name
, u16 name_len
,
3655 const void *data
, u16 data_len
);
3656 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3657 struct btrfs_root
*root
,
3658 struct btrfs_path
*path
, u64 dir
,
3659 const char *name
, u16 name_len
,
3661 int verify_dir_item(struct btrfs_root
*root
,
3662 struct extent_buffer
*leaf
,
3663 struct btrfs_dir_item
*dir_item
);
3666 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3667 struct btrfs_root
*root
, u64 offset
);
3668 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3669 struct btrfs_root
*root
, u64 offset
);
3670 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3673 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3674 struct btrfs_root
*root
,
3675 const char *name
, int name_len
,
3676 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3677 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3678 struct btrfs_root
*root
,
3679 const char *name
, int name_len
,
3680 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3681 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3682 struct btrfs_root
*root
,
3683 struct btrfs_path
*path
, u64 objectid
);
3684 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3685 *root
, struct btrfs_path
*path
,
3686 struct btrfs_key
*location
, int mod
);
3688 struct btrfs_inode_extref
*
3689 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3690 struct btrfs_root
*root
,
3691 struct btrfs_path
*path
,
3692 const char *name
, int name_len
,
3693 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3696 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3697 u64 ref_objectid
, const char *name
,
3699 struct btrfs_inode_extref
**extref_ret
);
3702 struct btrfs_dio_private
;
3703 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3704 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3705 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3706 struct bio
*bio
, u32
*dst
);
3707 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3708 struct btrfs_dio_private
*dip
, struct bio
*bio
,
3709 u64 logical_offset
);
3710 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3711 struct btrfs_root
*root
,
3712 u64 objectid
, u64 pos
,
3713 u64 disk_offset
, u64 disk_num_bytes
,
3714 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3715 u8 compression
, u8 encryption
, u16 other_encoding
);
3716 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3717 struct btrfs_root
*root
,
3718 struct btrfs_path
*path
, u64 objectid
,
3719 u64 bytenr
, int mod
);
3720 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3721 struct btrfs_root
*root
,
3722 struct btrfs_ordered_sum
*sums
);
3723 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3724 struct bio
*bio
, u64 file_start
, int contig
);
3725 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3726 struct list_head
*list
, int search_commit
);
3728 struct btrfs_delalloc_work
{
3729 struct inode
*inode
;
3732 struct completion completion
;
3733 struct list_head list
;
3734 struct btrfs_work work
;
3737 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3738 int wait
, int delay_iput
);
3739 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3741 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3742 size_t pg_offset
, u64 start
, u64 len
,
3744 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
3745 u64
*orig_start
, u64
*orig_block_len
,
3748 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3749 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3750 #define ClearPageChecked ClearPageFsMisc
3751 #define SetPageChecked SetPageFsMisc
3752 #define PageChecked PageFsMisc
3755 /* This forces readahead on a given range of bytes in an inode */
3756 static inline void btrfs_force_ra(struct address_space
*mapping
,
3757 struct file_ra_state
*ra
, struct file
*file
,
3758 pgoff_t offset
, unsigned long req_size
)
3760 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3763 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3764 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3765 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3766 struct btrfs_root
*root
,
3767 struct inode
*dir
, struct inode
*inode
,
3768 const char *name
, int name_len
);
3769 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3770 struct inode
*parent_inode
, struct inode
*inode
,
3771 const char *name
, int name_len
, int add_backref
, u64 index
);
3772 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3773 struct btrfs_root
*root
,
3774 struct inode
*dir
, u64 objectid
,
3775 const char *name
, int name_len
);
3776 int btrfs_truncate_page(struct inode
*inode
, loff_t from
, loff_t len
,
3778 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3779 struct btrfs_root
*root
,
3780 struct inode
*inode
, u64 new_size
,
3783 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3784 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, int delay_iput
,
3786 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3787 struct extent_state
**cached_state
);
3788 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3789 struct btrfs_root
*new_root
,
3790 struct btrfs_root
*parent_root
,
3792 int btrfs_merge_bio_hook(int rw
, struct page
*page
, unsigned long offset
,
3793 size_t size
, struct bio
*bio
,
3794 unsigned long bio_flags
);
3795 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3796 int btrfs_readpage(struct file
*file
, struct page
*page
);
3797 void btrfs_evict_inode(struct inode
*inode
);
3798 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3799 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3800 void btrfs_destroy_inode(struct inode
*inode
);
3801 int btrfs_drop_inode(struct inode
*inode
);
3802 int btrfs_init_cachep(void);
3803 void btrfs_destroy_cachep(void);
3804 long btrfs_ioctl_trans_end(struct file
*file
);
3805 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3806 struct btrfs_root
*root
, int *was_new
);
3807 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3808 size_t pg_offset
, u64 start
, u64 end
,
3810 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3811 struct btrfs_root
*root
,
3812 struct inode
*inode
);
3813 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3814 struct btrfs_root
*root
, struct inode
*inode
);
3815 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3816 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3817 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3818 struct btrfs_root
*root
);
3819 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3820 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3821 void btrfs_add_delayed_iput(struct inode
*inode
);
3822 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3823 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3824 u64 start
, u64 num_bytes
, u64 min_size
,
3825 loff_t actual_len
, u64
*alloc_hint
);
3826 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3827 struct btrfs_trans_handle
*trans
, int mode
,
3828 u64 start
, u64 num_bytes
, u64 min_size
,
3829 loff_t actual_len
, u64
*alloc_hint
);
3830 extern const struct dentry_operations btrfs_dentry_operations
;
3833 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3834 void btrfs_update_iflags(struct inode
*inode
);
3835 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3836 int btrfs_is_empty_uuid(u8
*uuid
);
3837 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3838 struct btrfs_ioctl_defrag_range_args
*range
,
3839 u64 newer_than
, unsigned long max_pages
);
3840 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3841 struct btrfs_ioctl_space_info
*space
);
3842 void update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
, int lock
,
3843 struct btrfs_ioctl_balance_args
*bargs
);
3847 int btrfs_auto_defrag_init(void);
3848 void btrfs_auto_defrag_exit(void);
3849 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3850 struct inode
*inode
);
3851 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3852 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3853 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3854 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3856 extern const struct file_operations btrfs_file_operations
;
3857 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3858 struct btrfs_root
*root
, struct inode
*inode
,
3859 struct btrfs_path
*path
, u64 start
, u64 end
,
3860 u64
*drop_end
, int drop_cache
,
3862 u32 extent_item_size
,
3864 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3865 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3866 u64 end
, int drop_cache
);
3867 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3868 struct inode
*inode
, u64 start
, u64 end
);
3869 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3870 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3871 struct page
**pages
, size_t num_pages
,
3872 loff_t pos
, size_t write_bytes
,
3873 struct extent_state
**cached
);
3876 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3877 struct btrfs_root
*root
);
3880 int btrfs_init_sysfs(void);
3881 void btrfs_exit_sysfs(void);
3882 int btrfs_sysfs_add_one(struct btrfs_fs_info
*fs_info
);
3883 void btrfs_sysfs_remove_one(struct btrfs_fs_info
*fs_info
);
3886 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3889 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
3890 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3892 #ifdef CONFIG_PRINTK
3894 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3896 static inline __printf(2, 3)
3897 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3902 #define btrfs_emerg(fs_info, fmt, args...) \
3903 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3904 #define btrfs_alert(fs_info, fmt, args...) \
3905 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3906 #define btrfs_crit(fs_info, fmt, args...) \
3907 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3908 #define btrfs_err(fs_info, fmt, args...) \
3909 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3910 #define btrfs_warn(fs_info, fmt, args...) \
3911 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3912 #define btrfs_notice(fs_info, fmt, args...) \
3913 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3914 #define btrfs_info(fs_info, fmt, args...) \
3915 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3918 #define btrfs_debug(fs_info, fmt, args...) \
3919 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3921 #define btrfs_debug(fs_info, fmt, args...) \
3922 no_printk(KERN_DEBUG fmt, ##args)
3925 #ifdef CONFIG_BTRFS_ASSERT
3927 static inline void assfail(char *expr
, char *file
, int line
)
3929 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
3934 #define ASSERT(expr) \
3935 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3937 #define ASSERT(expr) ((void)0)
3940 #define btrfs_assert()
3942 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3943 unsigned int line
, int errno
, const char *fmt
, ...);
3946 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3947 struct btrfs_root
*root
, const char *function
,
3948 unsigned int line
, int errno
);
3950 #define btrfs_set_fs_incompat(__fs_info, opt) \
3951 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3953 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3956 struct btrfs_super_block
*disk_super
;
3959 disk_super
= fs_info
->super_copy
;
3960 features
= btrfs_super_incompat_flags(disk_super
);
3961 if (!(features
& flag
)) {
3962 spin_lock(&fs_info
->super_lock
);
3963 features
= btrfs_super_incompat_flags(disk_super
);
3964 if (!(features
& flag
)) {
3966 btrfs_set_super_incompat_flags(disk_super
, features
);
3967 btrfs_info(fs_info
, "setting %llu feature flag",
3970 spin_unlock(&fs_info
->super_lock
);
3974 #define btrfs_fs_incompat(fs_info, opt) \
3975 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3977 static inline int __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
3979 struct btrfs_super_block
*disk_super
;
3980 disk_super
= fs_info
->super_copy
;
3981 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
3985 * Call btrfs_abort_transaction as early as possible when an error condition is
3986 * detected, that way the exact line number is reported.
3989 #define btrfs_abort_transaction(trans, root, errno) \
3991 __btrfs_abort_transaction(trans, root, __func__, \
3995 #define btrfs_std_error(fs_info, errno) \
3998 __btrfs_std_error((fs_info), __func__, \
3999 __LINE__, (errno), NULL); \
4002 #define btrfs_error(fs_info, errno, fmt, args...) \
4004 __btrfs_std_error((fs_info), __func__, __LINE__, \
4005 (errno), fmt, ##args); \
4009 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
4010 unsigned int line
, int errno
, const char *fmt
, ...);
4013 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
4014 * will panic(). Otherwise we BUG() here.
4016 #define btrfs_panic(fs_info, errno, fmt, args...) \
4018 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
4023 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
4024 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
4025 int btrfs_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
4026 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
4027 struct inode
*inode
, struct inode
*dir
);
4029 #define btrfs_get_acl NULL
4030 #define btrfs_set_acl NULL
4031 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
4032 struct inode
*inode
, struct inode
*dir
)
4039 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
4040 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
4041 struct btrfs_root
*root
);
4042 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
4043 struct btrfs_root
*root
);
4044 int btrfs_recover_relocation(struct btrfs_root
*root
);
4045 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
4046 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
4047 struct btrfs_root
*root
, struct extent_buffer
*buf
,
4048 struct extent_buffer
*cow
);
4049 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
4050 struct btrfs_pending_snapshot
*pending
,
4051 u64
*bytes_to_reserve
);
4052 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
4053 struct btrfs_pending_snapshot
*pending
);
4056 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
4057 u64 end
, struct btrfs_scrub_progress
*progress
,
4058 int readonly
, int is_dev_replace
);
4059 void btrfs_scrub_pause(struct btrfs_root
*root
);
4060 void btrfs_scrub_continue(struct btrfs_root
*root
);
4061 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
4062 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
4063 struct btrfs_device
*dev
);
4064 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
4065 struct btrfs_scrub_progress
*progress
);
4068 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info
*fs_info
);
4069 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info
*fs_info
);
4070 void btrfs_bio_counter_dec(struct btrfs_fs_info
*fs_info
);
4073 struct reada_control
{
4074 struct btrfs_root
*root
; /* tree to prefetch */
4075 struct btrfs_key key_start
;
4076 struct btrfs_key key_end
; /* exclusive */
4079 wait_queue_head_t wait
;
4081 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
4082 struct btrfs_key
*start
, struct btrfs_key
*end
);
4083 int btrfs_reada_wait(void *handle
);
4084 void btrfs_reada_detach(void *handle
);
4085 int btree_readahead_hook(struct btrfs_root
*root
, struct extent_buffer
*eb
,
4086 u64 start
, int err
);
4089 struct qgroup_update
{
4090 struct list_head list
;
4091 struct btrfs_delayed_ref_node
*node
;
4092 struct btrfs_delayed_extent_op
*extent_op
;
4095 int btrfs_quota_enable(struct btrfs_trans_handle
*trans
,
4096 struct btrfs_fs_info
*fs_info
);
4097 int btrfs_quota_disable(struct btrfs_trans_handle
*trans
,
4098 struct btrfs_fs_info
*fs_info
);
4099 int btrfs_qgroup_rescan(struct btrfs_fs_info
*fs_info
);
4100 void btrfs_qgroup_rescan_resume(struct btrfs_fs_info
*fs_info
);
4101 int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info
*fs_info
);
4102 int btrfs_add_qgroup_relation(struct btrfs_trans_handle
*trans
,
4103 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
4104 int btrfs_del_qgroup_relation(struct btrfs_trans_handle
*trans
,
4105 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
4106 int btrfs_create_qgroup(struct btrfs_trans_handle
*trans
,
4107 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
4109 int btrfs_remove_qgroup(struct btrfs_trans_handle
*trans
,
4110 struct btrfs_fs_info
*fs_info
, u64 qgroupid
);
4111 int btrfs_limit_qgroup(struct btrfs_trans_handle
*trans
,
4112 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
4113 struct btrfs_qgroup_limit
*limit
);
4114 int btrfs_read_qgroup_config(struct btrfs_fs_info
*fs_info
);
4115 void btrfs_free_qgroup_config(struct btrfs_fs_info
*fs_info
);
4116 struct btrfs_delayed_extent_op
;
4117 int btrfs_qgroup_record_ref(struct btrfs_trans_handle
*trans
,
4118 struct btrfs_delayed_ref_node
*node
,
4119 struct btrfs_delayed_extent_op
*extent_op
);
4120 int btrfs_qgroup_account_ref(struct btrfs_trans_handle
*trans
,
4121 struct btrfs_fs_info
*fs_info
,
4122 struct btrfs_delayed_ref_node
*node
,
4123 struct btrfs_delayed_extent_op
*extent_op
);
4124 int btrfs_run_qgroups(struct btrfs_trans_handle
*trans
,
4125 struct btrfs_fs_info
*fs_info
);
4126 int btrfs_qgroup_inherit(struct btrfs_trans_handle
*trans
,
4127 struct btrfs_fs_info
*fs_info
, u64 srcid
, u64 objectid
,
4128 struct btrfs_qgroup_inherit
*inherit
);
4129 int btrfs_qgroup_reserve(struct btrfs_root
*root
, u64 num_bytes
);
4130 void btrfs_qgroup_free(struct btrfs_root
*root
, u64 num_bytes
);
4132 void assert_qgroups_uptodate(struct btrfs_trans_handle
*trans
);
4134 static inline int is_fstree(u64 rootid
)
4136 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
4137 (s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
)
4142 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
4144 return signal_pending(current
);
4147 /* Sanity test specific functions */
4148 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4149 void btrfs_test_destroy_inode(struct inode
*inode
);