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 <linux/workqueue.h>
37 #include <linux/security.h>
38 #include <linux/sizes.h>
39 #include "extent_io.h"
40 #include "extent_map.h"
41 #include "async-thread.h"
43 struct btrfs_trans_handle
;
44 struct btrfs_transaction
;
45 struct btrfs_pending_snapshot
;
46 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
47 extern struct kmem_cache
*btrfs_transaction_cachep
;
48 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
49 extern struct kmem_cache
*btrfs_path_cachep
;
50 extern struct kmem_cache
*btrfs_free_space_cachep
;
51 struct btrfs_ordered_sum
;
53 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
54 #define STATIC noinline
56 #define STATIC static noinline
59 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
61 #define BTRFS_MAX_MIRRORS 3
63 #define BTRFS_MAX_LEVEL 8
65 #define BTRFS_COMPAT_EXTENT_TREE_V0
67 /* holds pointers to all of the tree roots */
68 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
70 /* stores information about which extents are in use, and reference counts */
71 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
74 * chunk tree stores translations from logical -> physical block numbering
75 * the super block points to the chunk tree
77 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
80 * stores information about which areas of a given device are in use.
81 * one per device. The tree of tree roots points to the device tree
83 #define BTRFS_DEV_TREE_OBJECTID 4ULL
85 /* one per subvolume, storing files and directories */
86 #define BTRFS_FS_TREE_OBJECTID 5ULL
88 /* directory objectid inside the root tree */
89 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
91 /* holds checksums of all the data extents */
92 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
94 /* holds quota configuration and tracking */
95 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
97 /* for storing items that use the BTRFS_UUID_KEY* types */
98 #define BTRFS_UUID_TREE_OBJECTID 9ULL
100 /* tracks free space in block groups. */
101 #define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
103 /* device stats in the device tree */
104 #define BTRFS_DEV_STATS_OBJECTID 0ULL
106 /* for storing balance parameters in the root tree */
107 #define BTRFS_BALANCE_OBJECTID -4ULL
109 /* orhpan objectid for tracking unlinked/truncated files */
110 #define BTRFS_ORPHAN_OBJECTID -5ULL
112 /* does write ahead logging to speed up fsyncs */
113 #define BTRFS_TREE_LOG_OBJECTID -6ULL
114 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
116 /* for space balancing */
117 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
118 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
121 * extent checksums all have this objectid
122 * this allows them to share the logging tree
125 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
127 /* For storing free space cache */
128 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
131 * The inode number assigned to the special inode for storing
134 #define BTRFS_FREE_INO_OBJECTID -12ULL
136 /* dummy objectid represents multiple objectids */
137 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
140 * All files have objectids in this range.
142 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
143 #define BTRFS_LAST_FREE_OBJECTID -256ULL
144 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
148 * the device items go into the chunk tree. The key is in the form
149 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
151 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
153 #define BTRFS_BTREE_INODE_OBJECTID 1
155 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
157 #define BTRFS_DEV_REPLACE_DEVID 0ULL
160 * the max metadata block size. This limit is somewhat artificial,
161 * but the memmove costs go through the roof for larger blocks.
163 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
166 * we can actually store much bigger names, but lets not confuse the rest
169 #define BTRFS_NAME_LEN 255
172 * Theoretical limit is larger, but we keep this down to a sane
173 * value. That should limit greatly the possibility of collisions on
176 #define BTRFS_LINK_MAX 65535U
178 /* 32 bytes in various csum fields */
179 #define BTRFS_CSUM_SIZE 32
182 #define BTRFS_CSUM_TYPE_CRC32 0
184 static const int btrfs_csum_sizes
[] = { 4 };
186 /* four bytes for CRC32 */
187 #define BTRFS_EMPTY_DIR_SIZE 0
189 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
190 #define REQ_GET_READ_MIRRORS (1 << 30)
192 #define BTRFS_FT_UNKNOWN 0
193 #define BTRFS_FT_REG_FILE 1
194 #define BTRFS_FT_DIR 2
195 #define BTRFS_FT_CHRDEV 3
196 #define BTRFS_FT_BLKDEV 4
197 #define BTRFS_FT_FIFO 5
198 #define BTRFS_FT_SOCK 6
199 #define BTRFS_FT_SYMLINK 7
200 #define BTRFS_FT_XATTR 8
201 #define BTRFS_FT_MAX 9
203 /* ioprio of readahead is set to idle */
204 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
206 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
208 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
211 * The key defines the order in the tree, and so it also defines (optimal)
214 * objectid corresponds to the inode number.
216 * type tells us things about the object, and is a kind of stream selector.
217 * so for a given inode, keys with type of 1 might refer to the inode data,
218 * type of 2 may point to file data in the btree and type == 3 may point to
221 * offset is the starting byte offset for this key in the stream.
223 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
224 * in cpu native order. Otherwise they are identical and their sizes
225 * should be the same (ie both packed)
227 struct btrfs_disk_key
{
231 } __attribute__ ((__packed__
));
237 } __attribute__ ((__packed__
));
239 struct btrfs_mapping_tree
{
240 struct extent_map_tree map_tree
;
243 struct btrfs_dev_item
{
244 /* the internal btrfs device id */
247 /* size of the device */
253 /* optimal io alignment for this device */
256 /* optimal io width for this device */
259 /* minimal io size for this device */
262 /* type and info about this device */
265 /* expected generation for this device */
269 * starting byte of this partition on the device,
270 * to allow for stripe alignment in the future
274 /* grouping information for allocation decisions */
277 /* seek speed 0-100 where 100 is fastest */
280 /* bandwidth 0-100 where 100 is fastest */
283 /* btrfs generated uuid for this device */
284 u8 uuid
[BTRFS_UUID_SIZE
];
286 /* uuid of FS who owns this device */
287 u8 fsid
[BTRFS_UUID_SIZE
];
288 } __attribute__ ((__packed__
));
290 struct btrfs_stripe
{
293 u8 dev_uuid
[BTRFS_UUID_SIZE
];
294 } __attribute__ ((__packed__
));
297 /* size of this chunk in bytes */
300 /* objectid of the root referencing this chunk */
306 /* optimal io alignment for this chunk */
309 /* optimal io width for this chunk */
312 /* minimal io size for this chunk */
315 /* 2^16 stripes is quite a lot, a second limit is the size of a single
320 /* sub stripes only matter for raid10 */
322 struct btrfs_stripe stripe
;
323 /* additional stripes go here */
324 } __attribute__ ((__packed__
));
326 #define BTRFS_FREE_SPACE_EXTENT 1
327 #define BTRFS_FREE_SPACE_BITMAP 2
329 struct btrfs_free_space_entry
{
333 } __attribute__ ((__packed__
));
335 struct btrfs_free_space_header
{
336 struct btrfs_disk_key location
;
340 } __attribute__ ((__packed__
));
342 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
344 BUG_ON(num_stripes
== 0);
345 return sizeof(struct btrfs_chunk
) +
346 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
349 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
350 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
355 #define BTRFS_FS_STATE_ERROR 0
356 #define BTRFS_FS_STATE_REMOUNTING 1
357 #define BTRFS_FS_STATE_TRANS_ABORTED 2
358 #define BTRFS_FS_STATE_DEV_REPLACING 3
360 /* Super block flags */
361 /* Errors detected */
362 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
364 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
365 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
367 #define BTRFS_BACKREF_REV_MAX 256
368 #define BTRFS_BACKREF_REV_SHIFT 56
369 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
370 BTRFS_BACKREF_REV_SHIFT)
372 #define BTRFS_OLD_BACKREF_REV 0
373 #define BTRFS_MIXED_BACKREF_REV 1
376 * every tree block (leaf or node) starts with this header.
378 struct btrfs_header
{
379 /* these first four must match the super block */
380 u8 csum
[BTRFS_CSUM_SIZE
];
381 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
382 __le64 bytenr
; /* which block this node is supposed to live in */
385 /* allowed to be different from the super from here on down */
386 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
391 } __attribute__ ((__packed__
));
393 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
394 sizeof(struct btrfs_header)) / \
395 sizeof(struct btrfs_key_ptr))
396 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
397 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
398 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
399 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
400 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
401 sizeof(struct btrfs_item) - \
402 BTRFS_FILE_EXTENT_INLINE_DATA_START)
403 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
404 sizeof(struct btrfs_item) -\
405 sizeof(struct btrfs_dir_item))
409 * this is a very generous portion of the super block, giving us
410 * room to translate 14 chunks with 3 stripes each.
412 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
413 #define BTRFS_LABEL_SIZE 256
416 * just in case we somehow lose the roots and are not able to mount,
417 * we store an array of the roots from previous transactions
420 #define BTRFS_NUM_BACKUP_ROOTS 4
421 struct btrfs_root_backup
{
423 __le64 tree_root_gen
;
426 __le64 chunk_root_gen
;
429 __le64 extent_root_gen
;
438 __le64 csum_root_gen
;
448 u8 extent_root_level
;
452 /* future and to align */
454 } __attribute__ ((__packed__
));
457 * the super block basically lists the main trees of the FS
458 * it currently lacks any block count etc etc
460 struct btrfs_super_block
{
461 u8 csum
[BTRFS_CSUM_SIZE
];
462 /* the first 4 fields must match struct btrfs_header */
463 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
464 __le64 bytenr
; /* this block number */
467 /* allowed to be different from the btrfs_header from here own down */
474 /* this will help find the new super based on the log root */
475 __le64 log_root_transid
;
478 __le64 root_dir_objectid
;
482 __le32 __unused_leafsize
;
484 __le32 sys_chunk_array_size
;
485 __le64 chunk_root_generation
;
487 __le64 compat_ro_flags
;
488 __le64 incompat_flags
;
493 struct btrfs_dev_item dev_item
;
495 char label
[BTRFS_LABEL_SIZE
];
497 __le64 cache_generation
;
498 __le64 uuid_tree_generation
;
500 /* future expansion */
502 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
503 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
504 } __attribute__ ((__packed__
));
507 * Compat flags that we support. If any incompat flags are set other than the
508 * ones specified below then we will fail to mount
510 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
512 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
513 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
514 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
515 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
517 * some patches floated around with a second compression method
518 * lets save that incompat here for when they do get in
519 * Note we don't actually support it, we're just reserving the
522 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
525 * older kernels tried to do bigger metadata blocks, but the
526 * code was pretty buggy. Lets not let them try anymore.
528 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
530 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
531 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
532 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
533 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
535 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
536 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
537 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
539 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
540 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
542 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
543 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
545 #define BTRFS_FEATURE_INCOMPAT_SUPP \
546 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
547 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
548 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
549 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
550 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
551 BTRFS_FEATURE_INCOMPAT_RAID56 | \
552 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
553 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
554 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
556 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
557 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
558 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
561 * A leaf is full of items. offset and size tell us where to find
562 * the item in the leaf (relative to the start of the data area)
565 struct btrfs_disk_key key
;
568 } __attribute__ ((__packed__
));
571 * leaves have an item area and a data area:
572 * [item0, item1....itemN] [free space] [dataN...data1, data0]
574 * The data is separate from the items to get the keys closer together
578 struct btrfs_header header
;
579 struct btrfs_item items
[];
580 } __attribute__ ((__packed__
));
583 * all non-leaf blocks are nodes, they hold only keys and pointers to
586 struct btrfs_key_ptr
{
587 struct btrfs_disk_key key
;
590 } __attribute__ ((__packed__
));
593 struct btrfs_header header
;
594 struct btrfs_key_ptr ptrs
[];
595 } __attribute__ ((__packed__
));
598 * btrfs_paths remember the path taken from the root down to the leaf.
599 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
600 * to any other levels that are present.
602 * The slots array records the index of the item or block pointer
603 * used while walking the tree.
605 enum { READA_NONE
= 0, READA_BACK
, READA_FORWARD
};
607 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
608 int slots
[BTRFS_MAX_LEVEL
];
609 /* if there is real range locking, this locks field will change */
610 u8 locks
[BTRFS_MAX_LEVEL
];
612 /* keep some upper locks as we walk down */
616 * set by btrfs_split_item, tells search_slot to keep all locks
617 * and to force calls to keep space in the nodes
619 unsigned int search_for_split
:1;
620 unsigned int keep_locks
:1;
621 unsigned int skip_locking
:1;
622 unsigned int leave_spinning
:1;
623 unsigned int search_commit_root
:1;
624 unsigned int need_commit_sem
:1;
625 unsigned int skip_release_on_error
:1;
629 * items in the extent btree are used to record the objectid of the
630 * owner of the block and the number of references
633 struct btrfs_extent_item
{
637 } __attribute__ ((__packed__
));
639 struct btrfs_extent_item_v0
{
641 } __attribute__ ((__packed__
));
643 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
644 sizeof(struct btrfs_item))
646 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
647 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
649 /* following flags only apply to tree blocks */
651 /* use full backrefs for extent pointers in the block */
652 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
655 * this flag is only used internally by scrub and may be changed at any time
656 * it is only declared here to avoid collisions
658 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
660 struct btrfs_tree_block_info
{
661 struct btrfs_disk_key key
;
663 } __attribute__ ((__packed__
));
665 struct btrfs_extent_data_ref
{
670 } __attribute__ ((__packed__
));
672 struct btrfs_shared_data_ref
{
674 } __attribute__ ((__packed__
));
676 struct btrfs_extent_inline_ref
{
679 } __attribute__ ((__packed__
));
681 /* old style backrefs item */
682 struct btrfs_extent_ref_v0
{
687 } __attribute__ ((__packed__
));
690 /* dev extents record free space on individual devices. The owner
691 * field points back to the chunk allocation mapping tree that allocated
692 * the extent. The chunk tree uuid field is a way to double check the owner
694 struct btrfs_dev_extent
{
696 __le64 chunk_objectid
;
699 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
700 } __attribute__ ((__packed__
));
702 struct btrfs_inode_ref
{
706 } __attribute__ ((__packed__
));
708 struct btrfs_inode_extref
{
709 __le64 parent_objectid
;
714 } __attribute__ ((__packed__
));
716 struct btrfs_timespec
{
719 } __attribute__ ((__packed__
));
721 enum btrfs_compression_type
{
722 BTRFS_COMPRESS_NONE
= 0,
723 BTRFS_COMPRESS_ZLIB
= 1,
724 BTRFS_COMPRESS_LZO
= 2,
725 BTRFS_COMPRESS_TYPES
= 2,
726 BTRFS_COMPRESS_LAST
= 3,
729 struct btrfs_inode_item
{
730 /* nfs style generation number */
732 /* transid that last touched this inode */
744 /* modification sequence number for NFS */
748 * a little future expansion, for more than this we can
749 * just grow the inode item and version it
752 struct btrfs_timespec atime
;
753 struct btrfs_timespec ctime
;
754 struct btrfs_timespec mtime
;
755 struct btrfs_timespec otime
;
756 } __attribute__ ((__packed__
));
758 struct btrfs_dir_log_item
{
760 } __attribute__ ((__packed__
));
762 struct btrfs_dir_item
{
763 struct btrfs_disk_key location
;
768 } __attribute__ ((__packed__
));
770 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
773 * Internal in-memory flag that a subvolume has been marked for deletion but
774 * still visible as a directory
776 #define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48)
778 struct btrfs_root_item
{
779 struct btrfs_inode_item inode
;
785 __le64 last_snapshot
;
788 struct btrfs_disk_key drop_progress
;
793 * The following fields appear after subvol_uuids+subvol_times
798 * This generation number is used to test if the new fields are valid
799 * and up to date while reading the root item. Everytime the root item
800 * is written out, the "generation" field is copied into this field. If
801 * anyone ever mounted the fs with an older kernel, we will have
802 * mismatching generation values here and thus must invalidate the
803 * new fields. See btrfs_update_root and btrfs_find_last_root for
805 * the offset of generation_v2 is also used as the start for the memset
806 * when invalidating the fields.
808 __le64 generation_v2
;
809 u8 uuid
[BTRFS_UUID_SIZE
];
810 u8 parent_uuid
[BTRFS_UUID_SIZE
];
811 u8 received_uuid
[BTRFS_UUID_SIZE
];
812 __le64 ctransid
; /* updated when an inode changes */
813 __le64 otransid
; /* trans when created */
814 __le64 stransid
; /* trans when sent. non-zero for received subvol */
815 __le64 rtransid
; /* trans when received. non-zero for received subvol */
816 struct btrfs_timespec ctime
;
817 struct btrfs_timespec otime
;
818 struct btrfs_timespec stime
;
819 struct btrfs_timespec rtime
;
820 __le64 reserved
[8]; /* for future */
821 } __attribute__ ((__packed__
));
824 * this is used for both forward and backward root refs
826 struct btrfs_root_ref
{
830 } __attribute__ ((__packed__
));
832 struct btrfs_disk_balance_args
{
834 * profiles to operate on, single is denoted by
835 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
841 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
842 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
855 /* devid subset filter [pstart..pend) */
859 /* btrfs virtual address space subset filter [vstart..vend) */
864 * profile to convert to, single is denoted by
865 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
869 /* BTRFS_BALANCE_ARGS_* */
873 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
874 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
886 * Process chunks that cross stripes_min..stripes_max devices,
887 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
893 } __attribute__ ((__packed__
));
896 * store balance parameters to disk so that balance can be properly
897 * resumed after crash or unmount
899 struct btrfs_balance_item
{
900 /* BTRFS_BALANCE_* */
903 struct btrfs_disk_balance_args data
;
904 struct btrfs_disk_balance_args meta
;
905 struct btrfs_disk_balance_args sys
;
908 } __attribute__ ((__packed__
));
910 #define BTRFS_FILE_EXTENT_INLINE 0
911 #define BTRFS_FILE_EXTENT_REG 1
912 #define BTRFS_FILE_EXTENT_PREALLOC 2
914 struct btrfs_file_extent_item
{
916 * transaction id that created this extent
920 * max number of bytes to hold this extent in ram
921 * when we split a compressed extent we can't know how big
922 * each of the resulting pieces will be. So, this is
923 * an upper limit on the size of the extent in ram instead of
929 * 32 bits for the various ways we might encode the data,
930 * including compression and encryption. If any of these
931 * are set to something a given disk format doesn't understand
932 * it is treated like an incompat flag for reading and writing,
937 __le16 other_encoding
; /* spare for later use */
939 /* are we inline data or a real extent? */
943 * disk space consumed by the extent, checksum blocks are included
946 * At this offset in the structure, the inline extent data start.
949 __le64 disk_num_bytes
;
951 * the logical offset in file blocks (no csums)
952 * this extent record is for. This allows a file extent to point
953 * into the middle of an existing extent on disk, sharing it
954 * between two snapshots (useful if some bytes in the middle of the
955 * extent have changed
959 * the logical number of file blocks (no csums included). This
960 * always reflects the size uncompressed and without encoding.
964 } __attribute__ ((__packed__
));
966 struct btrfs_csum_item
{
968 } __attribute__ ((__packed__
));
970 struct btrfs_dev_stats_item
{
972 * grow this item struct at the end for future enhancements and keep
973 * the existing values unchanged
975 __le64 values
[BTRFS_DEV_STAT_VALUES_MAX
];
976 } __attribute__ ((__packed__
));
978 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
979 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
980 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
981 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
982 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
983 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
984 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
986 struct btrfs_dev_replace
{
987 u64 replace_state
; /* see #define above */
988 u64 time_started
; /* seconds since 1-Jan-1970 */
989 u64 time_stopped
; /* seconds since 1-Jan-1970 */
990 atomic64_t num_write_errors
;
991 atomic64_t num_uncorrectable_read_errors
;
994 u64 committed_cursor_left
;
995 u64 cursor_left_last_write_of_item
;
998 u64 cont_reading_from_srcdev_mode
; /* see #define above */
1001 int item_needs_writeback
;
1002 struct btrfs_device
*srcdev
;
1003 struct btrfs_device
*tgtdev
;
1006 atomic_t nesting_level
;
1007 struct mutex lock_finishing_cancel_unmount
;
1009 atomic_t read_locks
;
1010 atomic_t blocking_readers
;
1011 wait_queue_head_t read_lock_wq
;
1013 struct btrfs_scrub_progress scrub_progress
;
1016 struct btrfs_dev_replace_item
{
1018 * grow this item struct at the end for future enhancements and keep
1019 * the existing values unchanged
1023 __le64 cursor_right
;
1024 __le64 cont_reading_from_srcdev_mode
;
1026 __le64 replace_state
;
1027 __le64 time_started
;
1028 __le64 time_stopped
;
1029 __le64 num_write_errors
;
1030 __le64 num_uncorrectable_read_errors
;
1031 } __attribute__ ((__packed__
));
1033 /* different types of block groups (and chunks) */
1034 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
1035 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
1036 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
1037 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
1038 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
1039 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
1040 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
1041 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
1042 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
1043 #define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
1044 BTRFS_SPACE_INFO_GLOBAL_RSV)
1046 enum btrfs_raid_types
{
1057 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1058 BTRFS_BLOCK_GROUP_SYSTEM | \
1059 BTRFS_BLOCK_GROUP_METADATA)
1061 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1062 BTRFS_BLOCK_GROUP_RAID1 | \
1063 BTRFS_BLOCK_GROUP_RAID5 | \
1064 BTRFS_BLOCK_GROUP_RAID6 | \
1065 BTRFS_BLOCK_GROUP_DUP | \
1066 BTRFS_BLOCK_GROUP_RAID10)
1067 #define BTRFS_BLOCK_GROUP_RAID56_MASK (BTRFS_BLOCK_GROUP_RAID5 | \
1068 BTRFS_BLOCK_GROUP_RAID6)
1071 * We need a bit for restriper to be able to tell when chunks of type
1072 * SINGLE are available. This "extended" profile format is used in
1073 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1074 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1075 * to avoid remappings between two formats in future.
1077 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1080 * A fake block group type that is used to communicate global block reserve
1081 * size to userspace via the SPACE_INFO ioctl.
1083 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
1085 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1086 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1088 static inline u64
chunk_to_extended(u64 flags
)
1090 if ((flags
& BTRFS_BLOCK_GROUP_PROFILE_MASK
) == 0)
1091 flags
|= BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1095 static inline u64
extended_to_chunk(u64 flags
)
1097 return flags
& ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1100 struct btrfs_block_group_item
{
1102 __le64 chunk_objectid
;
1104 } __attribute__ ((__packed__
));
1106 struct btrfs_free_space_info
{
1107 __le32 extent_count
;
1109 } __attribute__ ((__packed__
));
1111 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1113 #define BTRFS_QGROUP_LEVEL_SHIFT 48
1114 static inline u64
btrfs_qgroup_level(u64 qgroupid
)
1116 return qgroupid
>> BTRFS_QGROUP_LEVEL_SHIFT
;
1120 * is subvolume quota turned on?
1122 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1124 * RESCAN is set during the initialization phase
1126 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1128 * Some qgroup entries are known to be out of date,
1129 * either because the configuration has changed in a way that
1130 * makes a rescan necessary, or because the fs has been mounted
1131 * with a non-qgroup-aware version.
1132 * Turning qouta off and on again makes it inconsistent, too.
1134 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1136 #define BTRFS_QGROUP_STATUS_VERSION 1
1138 struct btrfs_qgroup_status_item
{
1141 * the generation is updated during every commit. As older
1142 * versions of btrfs are not aware of qgroups, it will be
1143 * possible to detect inconsistencies by checking the
1144 * generation on mount time
1148 /* flag definitions see above */
1152 * only used during scanning to record the progress
1153 * of the scan. It contains a logical address
1156 } __attribute__ ((__packed__
));
1158 struct btrfs_qgroup_info_item
{
1164 } __attribute__ ((__packed__
));
1166 /* flags definition for qgroup limits */
1167 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1168 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1169 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1170 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1171 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1172 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1174 struct btrfs_qgroup_limit_item
{
1176 * only updated when any of the other values change
1183 } __attribute__ ((__packed__
));
1185 /* For raid type sysfs entries */
1186 struct raid_kobject
{
1188 struct kobject kobj
;
1191 struct btrfs_space_info
{
1194 u64 total_bytes
; /* total bytes in the space,
1195 this doesn't take mirrors into account */
1196 u64 bytes_used
; /* total bytes used,
1197 this doesn't take mirrors into account */
1198 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
1199 transaction finishes */
1200 u64 bytes_reserved
; /* total bytes the allocator has reserved for
1201 current allocations */
1202 u64 bytes_may_use
; /* number of bytes that may be used for
1203 delalloc/allocations */
1204 u64 bytes_readonly
; /* total bytes that are read only */
1206 u64 max_extent_size
; /* This will hold the maximum extent size of
1207 the space info if we had an ENOSPC in the
1210 unsigned int full
:1; /* indicates that we cannot allocate any more
1211 chunks for this space */
1212 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
1214 unsigned int flush
:1; /* set if we are trying to make space */
1216 unsigned int force_alloc
; /* set if we need to force a chunk
1217 alloc for this space */
1219 u64 disk_used
; /* total bytes used on disk */
1220 u64 disk_total
; /* total bytes on disk, takes mirrors into
1226 * bytes_pinned is kept in line with what is actually pinned, as in
1227 * we've called update_block_group and dropped the bytes_used counter
1228 * and increased the bytes_pinned counter. However this means that
1229 * bytes_pinned does not reflect the bytes that will be pinned once the
1230 * delayed refs are flushed, so this counter is inc'ed everytime we call
1231 * btrfs_free_extent so it is a realtime count of what will be freed
1232 * once the transaction is committed. It will be zero'ed everytime the
1233 * transaction commits.
1235 struct percpu_counter total_bytes_pinned
;
1237 struct list_head list
;
1238 /* Protected by the spinlock 'lock'. */
1239 struct list_head ro_bgs
;
1241 struct rw_semaphore groups_sem
;
1242 /* for block groups in our same type */
1243 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
1244 wait_queue_head_t wait
;
1246 struct kobject kobj
;
1247 struct kobject
*block_group_kobjs
[BTRFS_NR_RAID_TYPES
];
1250 #define BTRFS_BLOCK_RSV_GLOBAL 1
1251 #define BTRFS_BLOCK_RSV_DELALLOC 2
1252 #define BTRFS_BLOCK_RSV_TRANS 3
1253 #define BTRFS_BLOCK_RSV_CHUNK 4
1254 #define BTRFS_BLOCK_RSV_DELOPS 5
1255 #define BTRFS_BLOCK_RSV_EMPTY 6
1256 #define BTRFS_BLOCK_RSV_TEMP 7
1258 struct btrfs_block_rsv
{
1261 struct btrfs_space_info
*space_info
;
1263 unsigned short full
;
1264 unsigned short type
;
1265 unsigned short failfast
;
1269 * free clusters are used to claim free space in relatively large chunks,
1270 * allowing us to do less seeky writes. They are used for all metadata
1271 * allocations and data allocations in ssd mode.
1273 struct btrfs_free_cluster
{
1275 spinlock_t refill_lock
;
1276 struct rb_root root
;
1278 /* largest extent in this cluster */
1281 /* first extent starting offset */
1284 /* We did a full search and couldn't create a cluster */
1287 struct btrfs_block_group_cache
*block_group
;
1289 * when a cluster is allocated from a block group, we put the
1290 * cluster onto a list in the block group so that it can
1291 * be freed before the block group is freed.
1293 struct list_head block_group_list
;
1296 enum btrfs_caching_type
{
1298 BTRFS_CACHE_STARTED
= 1,
1299 BTRFS_CACHE_FAST
= 2,
1300 BTRFS_CACHE_FINISHED
= 3,
1301 BTRFS_CACHE_ERROR
= 4,
1304 enum btrfs_disk_cache_state
{
1305 BTRFS_DC_WRITTEN
= 0,
1311 struct btrfs_caching_control
{
1312 struct list_head list
;
1314 wait_queue_head_t wait
;
1315 struct btrfs_work work
;
1316 struct btrfs_block_group_cache
*block_group
;
1321 /* Once caching_thread() finds this much free space, it will wake up waiters. */
1322 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
1324 struct btrfs_io_ctl
{
1327 struct page
**pages
;
1328 struct btrfs_root
*root
;
1329 struct inode
*inode
;
1335 unsigned check_crcs
:1;
1338 struct btrfs_block_group_cache
{
1339 struct btrfs_key key
;
1340 struct btrfs_block_group_item item
;
1341 struct btrfs_fs_info
*fs_info
;
1342 struct inode
*inode
;
1349 u64 cache_generation
;
1353 * If the free space extent count exceeds this number, convert the block
1356 u32 bitmap_high_thresh
;
1359 * If the free space extent count drops below this number, convert the
1360 * block group back to extents.
1362 u32 bitmap_low_thresh
;
1365 * It is just used for the delayed data space allocation because
1366 * only the data space allocation and the relative metadata update
1367 * can be done cross the transaction.
1369 struct rw_semaphore data_rwsem
;
1371 /* for raid56, this is a full stripe, without parity */
1372 unsigned long full_stripe_len
;
1375 unsigned int iref
:1;
1376 unsigned int has_caching_ctl
:1;
1377 unsigned int removed
:1;
1379 int disk_cache_state
;
1381 /* cache tracking stuff */
1383 struct btrfs_caching_control
*caching_ctl
;
1384 u64 last_byte_to_unpin
;
1386 struct btrfs_space_info
*space_info
;
1388 /* free space cache stuff */
1389 struct btrfs_free_space_ctl
*free_space_ctl
;
1391 /* block group cache stuff */
1392 struct rb_node cache_node
;
1394 /* for block groups in the same raid type */
1395 struct list_head list
;
1400 /* List of struct btrfs_free_clusters for this block group.
1401 * Today it will only have one thing on it, but that may change
1403 struct list_head cluster_list
;
1405 /* For delayed block group creation or deletion of empty block groups */
1406 struct list_head bg_list
;
1408 /* For read-only block groups */
1409 struct list_head ro_list
;
1413 /* For dirty block groups */
1414 struct list_head dirty_list
;
1415 struct list_head io_list
;
1417 struct btrfs_io_ctl io_ctl
;
1419 /* Lock for free space tree operations. */
1420 struct mutex free_space_lock
;
1423 * Does the block group need to be added to the free space tree?
1424 * Protected by free_space_lock.
1426 int needs_free_space
;
1429 /* delayed seq elem */
1431 struct list_head list
;
1435 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
1437 enum btrfs_orphan_cleanup_state
{
1438 ORPHAN_CLEANUP_STARTED
= 1,
1439 ORPHAN_CLEANUP_DONE
= 2,
1442 /* used by the raid56 code to lock stripes for read/modify/write */
1443 struct btrfs_stripe_hash
{
1444 struct list_head hash_list
;
1445 wait_queue_head_t wait
;
1449 /* used by the raid56 code to lock stripes for read/modify/write */
1450 struct btrfs_stripe_hash_table
{
1451 struct list_head stripe_cache
;
1452 spinlock_t cache_lock
;
1454 struct btrfs_stripe_hash table
[];
1457 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1459 void btrfs_init_async_reclaim_work(struct work_struct
*work
);
1462 struct reloc_control
;
1463 struct btrfs_device
;
1464 struct btrfs_fs_devices
;
1465 struct btrfs_balance_control
;
1466 struct btrfs_delayed_root
;
1467 struct btrfs_fs_info
{
1468 u8 fsid
[BTRFS_FSID_SIZE
];
1469 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1470 struct btrfs_root
*extent_root
;
1471 struct btrfs_root
*tree_root
;
1472 struct btrfs_root
*chunk_root
;
1473 struct btrfs_root
*dev_root
;
1474 struct btrfs_root
*fs_root
;
1475 struct btrfs_root
*csum_root
;
1476 struct btrfs_root
*quota_root
;
1477 struct btrfs_root
*uuid_root
;
1478 struct btrfs_root
*free_space_root
;
1480 /* the log root tree is a directory of all the other log roots */
1481 struct btrfs_root
*log_root_tree
;
1483 spinlock_t fs_roots_radix_lock
;
1484 struct radix_tree_root fs_roots_radix
;
1486 /* block group cache stuff */
1487 spinlock_t block_group_cache_lock
;
1488 u64 first_logical_byte
;
1489 struct rb_root block_group_cache_tree
;
1491 /* keep track of unallocated space */
1492 spinlock_t free_chunk_lock
;
1493 u64 free_chunk_space
;
1495 struct extent_io_tree freed_extents
[2];
1496 struct extent_io_tree
*pinned_extents
;
1498 /* logical->physical extent mapping */
1499 struct btrfs_mapping_tree mapping_tree
;
1502 * block reservation for extent, checksum, root tree and
1503 * delayed dir index item
1505 struct btrfs_block_rsv global_block_rsv
;
1506 /* block reservation for delay allocation */
1507 struct btrfs_block_rsv delalloc_block_rsv
;
1508 /* block reservation for metadata operations */
1509 struct btrfs_block_rsv trans_block_rsv
;
1510 /* block reservation for chunk tree */
1511 struct btrfs_block_rsv chunk_block_rsv
;
1512 /* block reservation for delayed operations */
1513 struct btrfs_block_rsv delayed_block_rsv
;
1515 struct btrfs_block_rsv empty_block_rsv
;
1518 u64 last_trans_committed
;
1519 u64 avg_delayed_ref_runtime
;
1522 * this is updated to the current trans every time a full commit
1523 * is required instead of the faster short fsync log commits
1525 u64 last_trans_log_full_commit
;
1526 unsigned long mount_opt
;
1528 * Track requests for actions that need to be done during transaction
1529 * commit (like for some mount options).
1531 unsigned long pending_changes
;
1532 unsigned long compress_type
:4;
1533 int commit_interval
;
1535 * It is a suggestive number, the read side is safe even it gets a
1536 * wrong number because we will write out the data into a regular
1537 * extent. The write side(mount/remount) is under ->s_umount lock,
1538 * so it is also safe.
1542 * Protected by ->chunk_mutex and sb->s_umount.
1544 * The reason that we use two lock to protect it is because only
1545 * remount and mount operations can change it and these two operations
1546 * are under sb->s_umount, but the read side (chunk allocation) can not
1547 * acquire sb->s_umount or the deadlock would happen. So we use two
1548 * locks to protect it. On the write side, we must acquire two locks,
1549 * and on the read side, we just need acquire one of them.
1552 struct btrfs_transaction
*running_transaction
;
1553 wait_queue_head_t transaction_throttle
;
1554 wait_queue_head_t transaction_wait
;
1555 wait_queue_head_t transaction_blocked_wait
;
1556 wait_queue_head_t async_submit_wait
;
1559 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1560 * when they are updated.
1562 * Because we do not clear the flags for ever, so we needn't use
1563 * the lock on the read side.
1565 * We also needn't use the lock when we mount the fs, because
1566 * there is no other task which will update the flag.
1568 spinlock_t super_lock
;
1569 struct btrfs_super_block
*super_copy
;
1570 struct btrfs_super_block
*super_for_commit
;
1571 struct block_device
*__bdev
;
1572 struct super_block
*sb
;
1573 struct inode
*btree_inode
;
1574 struct backing_dev_info bdi
;
1575 struct mutex tree_log_mutex
;
1576 struct mutex transaction_kthread_mutex
;
1577 struct mutex cleaner_mutex
;
1578 struct mutex chunk_mutex
;
1579 struct mutex volume_mutex
;
1582 * this is taken to make sure we don't set block groups ro after
1583 * the free space cache has been allocated on them
1585 struct mutex ro_block_group_mutex
;
1587 /* this is used during read/modify/write to make sure
1588 * no two ios are trying to mod the same stripe at the same
1591 struct btrfs_stripe_hash_table
*stripe_hash_table
;
1594 * this protects the ordered operations list only while we are
1595 * processing all of the entries on it. This way we make
1596 * sure the commit code doesn't find the list temporarily empty
1597 * because another function happens to be doing non-waiting preflush
1598 * before jumping into the main commit.
1600 struct mutex ordered_operations_mutex
;
1602 struct rw_semaphore commit_root_sem
;
1604 struct rw_semaphore cleanup_work_sem
;
1606 struct rw_semaphore subvol_sem
;
1607 struct srcu_struct subvol_srcu
;
1609 spinlock_t trans_lock
;
1611 * the reloc mutex goes with the trans lock, it is taken
1612 * during commit to protect us from the relocation code
1614 struct mutex reloc_mutex
;
1616 struct list_head trans_list
;
1617 struct list_head dead_roots
;
1618 struct list_head caching_block_groups
;
1620 spinlock_t delayed_iput_lock
;
1621 struct list_head delayed_iputs
;
1622 struct mutex cleaner_delayed_iput_mutex
;
1624 /* this protects tree_mod_seq_list */
1625 spinlock_t tree_mod_seq_lock
;
1626 atomic64_t tree_mod_seq
;
1627 struct list_head tree_mod_seq_list
;
1629 /* this protects tree_mod_log */
1630 rwlock_t tree_mod_log_lock
;
1631 struct rb_root tree_mod_log
;
1633 atomic_t nr_async_submits
;
1634 atomic_t async_submit_draining
;
1635 atomic_t nr_async_bios
;
1636 atomic_t async_delalloc_pages
;
1637 atomic_t open_ioctl_trans
;
1640 * this is used to protect the following list -- ordered_roots.
1642 spinlock_t ordered_root_lock
;
1645 * all fs/file tree roots in which there are data=ordered extents
1646 * pending writeback are added into this list.
1648 * these can span multiple transactions and basically include
1649 * every dirty data page that isn't from nodatacow
1651 struct list_head ordered_roots
;
1653 struct mutex delalloc_root_mutex
;
1654 spinlock_t delalloc_root_lock
;
1655 /* all fs/file tree roots that have delalloc inodes. */
1656 struct list_head delalloc_roots
;
1659 * there is a pool of worker threads for checksumming during writes
1660 * and a pool for checksumming after reads. This is because readers
1661 * can run with FS locks held, and the writers may be waiting for
1662 * those locks. We don't want ordering in the pending list to cause
1663 * deadlocks, and so the two are serviced separately.
1665 * A third pool does submit_bio to avoid deadlocking with the other
1668 struct btrfs_workqueue
*workers
;
1669 struct btrfs_workqueue
*delalloc_workers
;
1670 struct btrfs_workqueue
*flush_workers
;
1671 struct btrfs_workqueue
*endio_workers
;
1672 struct btrfs_workqueue
*endio_meta_workers
;
1673 struct btrfs_workqueue
*endio_raid56_workers
;
1674 struct btrfs_workqueue
*endio_repair_workers
;
1675 struct btrfs_workqueue
*rmw_workers
;
1676 struct btrfs_workqueue
*endio_meta_write_workers
;
1677 struct btrfs_workqueue
*endio_write_workers
;
1678 struct btrfs_workqueue
*endio_freespace_worker
;
1679 struct btrfs_workqueue
*submit_workers
;
1680 struct btrfs_workqueue
*caching_workers
;
1681 struct btrfs_workqueue
*readahead_workers
;
1684 * fixup workers take dirty pages that didn't properly go through
1685 * the cow mechanism and make them safe to write. It happens
1686 * for the sys_munmap function call path
1688 struct btrfs_workqueue
*fixup_workers
;
1689 struct btrfs_workqueue
*delayed_workers
;
1691 /* the extent workers do delayed refs on the extent allocation tree */
1692 struct btrfs_workqueue
*extent_workers
;
1693 struct task_struct
*transaction_kthread
;
1694 struct task_struct
*cleaner_kthread
;
1695 int thread_pool_size
;
1697 struct kobject
*space_info_kobj
;
1700 int log_root_recovering
;
1705 /* used to keep from writing metadata until there is a nice batch */
1706 struct percpu_counter dirty_metadata_bytes
;
1707 struct percpu_counter delalloc_bytes
;
1708 s32 dirty_metadata_batch
;
1711 struct list_head dirty_cowonly_roots
;
1713 struct btrfs_fs_devices
*fs_devices
;
1716 * the space_info list is almost entirely read only. It only changes
1717 * when we add a new raid type to the FS, and that happens
1718 * very rarely. RCU is used to protect it.
1720 struct list_head space_info
;
1722 struct btrfs_space_info
*data_sinfo
;
1724 struct reloc_control
*reloc_ctl
;
1726 /* data_alloc_cluster is only used in ssd mode */
1727 struct btrfs_free_cluster data_alloc_cluster
;
1729 /* all metadata allocations go through this cluster */
1730 struct btrfs_free_cluster meta_alloc_cluster
;
1732 /* auto defrag inodes go here */
1733 spinlock_t defrag_inodes_lock
;
1734 struct rb_root defrag_inodes
;
1735 atomic_t defrag_running
;
1737 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1738 seqlock_t profiles_lock
;
1740 * these three are in extended format (availability of single
1741 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1742 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1744 u64 avail_data_alloc_bits
;
1745 u64 avail_metadata_alloc_bits
;
1746 u64 avail_system_alloc_bits
;
1748 /* restriper state */
1749 spinlock_t balance_lock
;
1750 struct mutex balance_mutex
;
1751 atomic_t balance_running
;
1752 atomic_t balance_pause_req
;
1753 atomic_t balance_cancel_req
;
1754 struct btrfs_balance_control
*balance_ctl
;
1755 wait_queue_head_t balance_wait_q
;
1757 unsigned data_chunk_allocations
;
1758 unsigned metadata_ratio
;
1762 /* private scrub information */
1763 struct mutex scrub_lock
;
1764 atomic_t scrubs_running
;
1765 atomic_t scrub_pause_req
;
1766 atomic_t scrubs_paused
;
1767 atomic_t scrub_cancel_req
;
1768 wait_queue_head_t scrub_pause_wait
;
1769 int scrub_workers_refcnt
;
1770 struct btrfs_workqueue
*scrub_workers
;
1771 struct btrfs_workqueue
*scrub_wr_completion_workers
;
1772 struct btrfs_workqueue
*scrub_nocow_workers
;
1773 struct btrfs_workqueue
*scrub_parity_workers
;
1775 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1776 u32 check_integrity_print_mask
;
1781 unsigned int quota_enabled
:1;
1784 * quota_enabled only changes state after a commit. This holds the
1787 unsigned int pending_quota_state
:1;
1789 /* is qgroup tracking in a consistent state? */
1792 /* holds configuration and tracking. Protected by qgroup_lock */
1793 struct rb_root qgroup_tree
;
1794 struct rb_root qgroup_op_tree
;
1795 spinlock_t qgroup_lock
;
1796 spinlock_t qgroup_op_lock
;
1797 atomic_t qgroup_op_seq
;
1800 * used to avoid frequently calling ulist_alloc()/ulist_free()
1801 * when doing qgroup accounting, it must be protected by qgroup_lock.
1803 struct ulist
*qgroup_ulist
;
1805 /* protect user change for quota operations */
1806 struct mutex qgroup_ioctl_lock
;
1808 /* list of dirty qgroups to be written at next commit */
1809 struct list_head dirty_qgroups
;
1811 /* used by qgroup for an efficient tree traversal */
1814 /* qgroup rescan items */
1815 struct mutex qgroup_rescan_lock
; /* protects the progress item */
1816 struct btrfs_key qgroup_rescan_progress
;
1817 struct btrfs_workqueue
*qgroup_rescan_workers
;
1818 struct completion qgroup_rescan_completion
;
1819 struct btrfs_work qgroup_rescan_work
;
1821 /* filesystem state */
1822 unsigned long fs_state
;
1824 struct btrfs_delayed_root
*delayed_root
;
1826 /* readahead tree */
1827 spinlock_t reada_lock
;
1828 struct radix_tree_root reada_tree
;
1830 /* readahead works cnt */
1831 atomic_t reada_works_cnt
;
1833 /* Extent buffer radix tree */
1834 spinlock_t buffer_lock
;
1835 struct radix_tree_root buffer_radix
;
1837 /* next backup root to be overwritten */
1838 int backup_root_index
;
1840 int num_tolerated_disk_barrier_failures
;
1842 /* device replace state */
1843 struct btrfs_dev_replace dev_replace
;
1845 atomic_t mutually_exclusive_operation_running
;
1847 struct percpu_counter bio_counter
;
1848 wait_queue_head_t replace_wait
;
1850 struct semaphore uuid_tree_rescan_sem
;
1851 unsigned int update_uuid_tree_gen
:1;
1853 /* Used to reclaim the metadata space in the background. */
1854 struct work_struct async_reclaim_work
;
1856 spinlock_t unused_bgs_lock
;
1857 struct list_head unused_bgs
;
1858 struct mutex unused_bg_unpin_mutex
;
1859 struct mutex delete_unused_bgs_mutex
;
1861 /* For btrfs to record security options */
1862 struct security_mnt_opts security_opts
;
1865 * Chunks that can't be freed yet (under a trim/discard operation)
1866 * and will be latter freed. Protected by fs_info->chunk_mutex.
1868 struct list_head pinned_chunks
;
1870 int creating_free_space_tree
;
1873 struct btrfs_subvolume_writers
{
1874 struct percpu_counter counter
;
1875 wait_queue_head_t wait
;
1879 * The state of btrfs root
1882 * btrfs_record_root_in_trans is a multi-step process,
1883 * and it can race with the balancing code. But the
1884 * race is very small, and only the first time the root
1885 * is added to each transaction. So IN_TRANS_SETUP
1886 * is used to tell us when more checks are required
1888 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1889 #define BTRFS_ROOT_REF_COWS 1
1890 #define BTRFS_ROOT_TRACK_DIRTY 2
1891 #define BTRFS_ROOT_IN_RADIX 3
1892 #define BTRFS_ROOT_DUMMY_ROOT 4
1893 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1894 #define BTRFS_ROOT_DEFRAG_RUNNING 6
1895 #define BTRFS_ROOT_FORCE_COW 7
1896 #define BTRFS_ROOT_MULTI_LOG_TASKS 8
1897 #define BTRFS_ROOT_DIRTY 9
1900 * in ram representation of the tree. extent_root is used for all allocations
1901 * and for the extent tree extent_root root.
1904 struct extent_buffer
*node
;
1906 struct extent_buffer
*commit_root
;
1907 struct btrfs_root
*log_root
;
1908 struct btrfs_root
*reloc_root
;
1910 unsigned long state
;
1911 struct btrfs_root_item root_item
;
1912 struct btrfs_key root_key
;
1913 struct btrfs_fs_info
*fs_info
;
1914 struct extent_io_tree dirty_log_pages
;
1916 struct mutex objectid_mutex
;
1918 spinlock_t accounting_lock
;
1919 struct btrfs_block_rsv
*block_rsv
;
1921 /* free ino cache stuff */
1922 struct btrfs_free_space_ctl
*free_ino_ctl
;
1923 enum btrfs_caching_type ino_cache_state
;
1924 spinlock_t ino_cache_lock
;
1925 wait_queue_head_t ino_cache_wait
;
1926 struct btrfs_free_space_ctl
*free_ino_pinned
;
1927 u64 ino_cache_progress
;
1928 struct inode
*ino_cache_inode
;
1930 struct mutex log_mutex
;
1931 wait_queue_head_t log_writer_wait
;
1932 wait_queue_head_t log_commit_wait
[2];
1933 struct list_head log_ctxs
[2];
1934 atomic_t log_writers
;
1935 atomic_t log_commit
[2];
1938 /* No matter the commit succeeds or not*/
1939 int log_transid_committed
;
1940 /* Just be updated when the commit succeeds. */
1941 int last_log_commit
;
1942 pid_t log_start_pid
;
1947 /* data allocations are done in sectorsize units */
1950 /* node allocations are done in nodesize units */
1957 u64 highest_objectid
;
1959 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1962 u64 defrag_trans_start
;
1963 struct btrfs_key defrag_progress
;
1964 struct btrfs_key defrag_max
;
1967 /* the dirty list is only used by non-reference counted roots */
1968 struct list_head dirty_list
;
1970 struct list_head root_list
;
1972 spinlock_t log_extents_lock
[2];
1973 struct list_head logged_list
[2];
1975 spinlock_t orphan_lock
;
1976 atomic_t orphan_inodes
;
1977 struct btrfs_block_rsv
*orphan_block_rsv
;
1978 int orphan_cleanup_state
;
1980 spinlock_t inode_lock
;
1981 /* red-black tree that keeps track of in-memory inodes */
1982 struct rb_root inode_tree
;
1985 * radix tree that keeps track of delayed nodes of every inode,
1986 * protected by inode_lock
1988 struct radix_tree_root delayed_nodes_tree
;
1990 * right now this just gets used so that a root has its own devid
1991 * for stat. It may be used for more later
1995 spinlock_t root_item_lock
;
1998 struct mutex delalloc_mutex
;
1999 spinlock_t delalloc_lock
;
2001 * all of the inodes that have delalloc bytes. It is possible for
2002 * this list to be empty even when there is still dirty data=ordered
2003 * extents waiting to finish IO.
2005 struct list_head delalloc_inodes
;
2006 struct list_head delalloc_root
;
2007 u64 nr_delalloc_inodes
;
2009 struct mutex ordered_extent_mutex
;
2011 * this is used by the balancing code to wait for all the pending
2014 spinlock_t ordered_extent_lock
;
2017 * all of the data=ordered extents pending writeback
2018 * these can span multiple transactions and basically include
2019 * every dirty data page that isn't from nodatacow
2021 struct list_head ordered_extents
;
2022 struct list_head ordered_root
;
2023 u64 nr_ordered_extents
;
2026 * Number of currently running SEND ioctls to prevent
2027 * manipulation with the read-only status via SUBVOL_SETFLAGS
2029 int send_in_progress
;
2030 struct btrfs_subvolume_writers
*subv_writers
;
2031 atomic_t will_be_snapshoted
;
2033 /* For qgroup metadata space reserve */
2034 atomic_t qgroup_meta_rsv
;
2037 struct btrfs_ioctl_defrag_range_args
{
2038 /* start of the defrag operation */
2041 /* number of bytes to defrag, use (u64)-1 to say all */
2045 * flags for the operation, which can include turning
2046 * on compression for this one defrag
2051 * any extent bigger than this will be considered
2052 * already defragged. Use 0 to take the kernel default
2053 * Use 1 to say every single extent must be rewritten
2055 __u32 extent_thresh
;
2058 * which compression method to use if turning on compression
2059 * for this defrag operation. If unspecified, zlib will
2062 __u32 compress_type
;
2064 /* spare for later */
2070 * inode items have the data typically returned from stat and store other
2071 * info about object characteristics. There is one for every file and dir in
2074 #define BTRFS_INODE_ITEM_KEY 1
2075 #define BTRFS_INODE_REF_KEY 12
2076 #define BTRFS_INODE_EXTREF_KEY 13
2077 #define BTRFS_XATTR_ITEM_KEY 24
2078 #define BTRFS_ORPHAN_ITEM_KEY 48
2079 /* reserve 2-15 close to the inode for later flexibility */
2082 * dir items are the name -> inode pointers in a directory. There is one
2083 * for every name in a directory.
2085 #define BTRFS_DIR_LOG_ITEM_KEY 60
2086 #define BTRFS_DIR_LOG_INDEX_KEY 72
2087 #define BTRFS_DIR_ITEM_KEY 84
2088 #define BTRFS_DIR_INDEX_KEY 96
2090 * extent data is for file data
2092 #define BTRFS_EXTENT_DATA_KEY 108
2095 * extent csums are stored in a separate tree and hold csums for
2096 * an entire extent on disk.
2098 #define BTRFS_EXTENT_CSUM_KEY 128
2101 * root items point to tree roots. They are typically in the root
2102 * tree used by the super block to find all the other trees
2104 #define BTRFS_ROOT_ITEM_KEY 132
2107 * root backrefs tie subvols and snapshots to the directory entries that
2110 #define BTRFS_ROOT_BACKREF_KEY 144
2113 * root refs make a fast index for listing all of the snapshots and
2114 * subvolumes referenced by a given root. They point directly to the
2115 * directory item in the root that references the subvol
2117 #define BTRFS_ROOT_REF_KEY 156
2120 * extent items are in the extent map tree. These record which blocks
2121 * are used, and how many references there are to each block
2123 #define BTRFS_EXTENT_ITEM_KEY 168
2126 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
2127 * the length, so we save the level in key->offset instead of the length.
2129 #define BTRFS_METADATA_ITEM_KEY 169
2131 #define BTRFS_TREE_BLOCK_REF_KEY 176
2133 #define BTRFS_EXTENT_DATA_REF_KEY 178
2135 #define BTRFS_EXTENT_REF_V0_KEY 180
2137 #define BTRFS_SHARED_BLOCK_REF_KEY 182
2139 #define BTRFS_SHARED_DATA_REF_KEY 184
2142 * block groups give us hints into the extent allocation trees. Which
2143 * blocks are free etc etc
2145 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
2148 * Every block group is represented in the free space tree by a free space info
2149 * item, which stores some accounting information. It is keyed on
2150 * (block_group_start, FREE_SPACE_INFO, block_group_length).
2152 #define BTRFS_FREE_SPACE_INFO_KEY 198
2155 * A free space extent tracks an extent of space that is free in a block group.
2156 * It is keyed on (start, FREE_SPACE_EXTENT, length).
2158 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
2161 * When a block group becomes very fragmented, we convert it to use bitmaps
2162 * instead of extents. A free space bitmap is keyed on
2163 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
2164 * (length / sectorsize) bits.
2166 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
2168 #define BTRFS_DEV_EXTENT_KEY 204
2169 #define BTRFS_DEV_ITEM_KEY 216
2170 #define BTRFS_CHUNK_ITEM_KEY 228
2173 * Records the overall state of the qgroups.
2174 * There's only one instance of this key present,
2175 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
2177 #define BTRFS_QGROUP_STATUS_KEY 240
2179 * Records the currently used space of the qgroup.
2180 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
2182 #define BTRFS_QGROUP_INFO_KEY 242
2184 * Contains the user configured limits for the qgroup.
2185 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
2187 #define BTRFS_QGROUP_LIMIT_KEY 244
2189 * Records the child-parent relationship of qgroups. For
2190 * each relation, 2 keys are present:
2191 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
2192 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
2194 #define BTRFS_QGROUP_RELATION_KEY 246
2197 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
2199 #define BTRFS_BALANCE_ITEM_KEY 248
2202 * The key type for tree items that are stored persistently, but do not need to
2203 * exist for extended period of time. The items can exist in any tree.
2205 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
2209 * - balance status item
2210 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
2212 #define BTRFS_TEMPORARY_ITEM_KEY 248
2215 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
2217 #define BTRFS_DEV_STATS_KEY 249
2220 * The key type for tree items that are stored persistently and usually exist
2221 * for a long period, eg. filesystem lifetime. The item kinds can be status
2222 * information, stats or preference values. The item can exist in any tree.
2224 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
2228 * - device statistics, store IO stats in the device tree, one key for all
2230 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
2232 #define BTRFS_PERSISTENT_ITEM_KEY 249
2235 * Persistantly stores the device replace state in the device tree.
2236 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
2238 #define BTRFS_DEV_REPLACE_KEY 250
2241 * Stores items that allow to quickly map UUIDs to something else.
2242 * These items are part of the filesystem UUID tree.
2243 * The key is built like this:
2244 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
2246 #if BTRFS_UUID_SIZE != 16
2247 #error "UUID items require BTRFS_UUID_SIZE == 16!"
2249 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
2250 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
2251 * received subvols */
2254 * string items are for debugging. They just store a short string of
2257 #define BTRFS_STRING_ITEM_KEY 253
2260 * Flags for mount options.
2262 * Note: don't forget to add new options to btrfs_show_options()
2264 #define BTRFS_MOUNT_NODATASUM (1 << 0)
2265 #define BTRFS_MOUNT_NODATACOW (1 << 1)
2266 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
2267 #define BTRFS_MOUNT_SSD (1 << 3)
2268 #define BTRFS_MOUNT_DEGRADED (1 << 4)
2269 #define BTRFS_MOUNT_COMPRESS (1 << 5)
2270 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
2271 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
2272 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
2273 #define BTRFS_MOUNT_NOSSD (1 << 9)
2274 #define BTRFS_MOUNT_DISCARD (1 << 10)
2275 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
2276 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2277 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2278 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2279 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2280 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2281 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2282 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
2283 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2284 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2285 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2286 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2287 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2288 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
2289 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
2290 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
2291 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
2293 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2294 #define BTRFS_DEFAULT_MAX_INLINE (2048)
2296 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2297 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2298 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2299 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2302 #define btrfs_set_and_info(root, opt, fmt, args...) \
2304 if (!btrfs_test_opt(root, opt)) \
2305 btrfs_info(root->fs_info, fmt, ##args); \
2306 btrfs_set_opt(root->fs_info->mount_opt, opt); \
2309 #define btrfs_clear_and_info(root, opt, fmt, args...) \
2311 if (btrfs_test_opt(root, opt)) \
2312 btrfs_info(root->fs_info, fmt, ##args); \
2313 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
2316 #ifdef CONFIG_BTRFS_DEBUG
2318 btrfs_should_fragment_free_space(struct btrfs_root
*root
,
2319 struct btrfs_block_group_cache
*block_group
)
2321 return (btrfs_test_opt(root
, FRAGMENT_METADATA
) &&
2322 block_group
->flags
& BTRFS_BLOCK_GROUP_METADATA
) ||
2323 (btrfs_test_opt(root
, FRAGMENT_DATA
) &&
2324 block_group
->flags
& BTRFS_BLOCK_GROUP_DATA
);
2329 * Requests for changes that need to be done during transaction commit.
2331 * Internal mount options that are used for special handling of the real
2332 * mount options (eg. cannot be set during remount and have to be set during
2333 * transaction commit)
2336 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
2337 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
2338 #define BTRFS_PENDING_COMMIT (2)
2340 #define btrfs_test_pending(info, opt) \
2341 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2342 #define btrfs_set_pending(info, opt) \
2343 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2344 #define btrfs_clear_pending(info, opt) \
2345 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2348 * Helpers for setting pending mount option changes.
2350 * Expects corresponding macros
2351 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
2353 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
2355 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2356 btrfs_info((info), fmt, ##args); \
2357 btrfs_set_pending((info), SET_##opt); \
2358 btrfs_clear_pending((info), CLEAR_##opt); \
2362 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
2364 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2365 btrfs_info((info), fmt, ##args); \
2366 btrfs_set_pending((info), CLEAR_##opt); \
2367 btrfs_clear_pending((info), SET_##opt); \
2374 #define BTRFS_INODE_NODATASUM (1 << 0)
2375 #define BTRFS_INODE_NODATACOW (1 << 1)
2376 #define BTRFS_INODE_READONLY (1 << 2)
2377 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2378 #define BTRFS_INODE_PREALLOC (1 << 4)
2379 #define BTRFS_INODE_SYNC (1 << 5)
2380 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2381 #define BTRFS_INODE_APPEND (1 << 7)
2382 #define BTRFS_INODE_NODUMP (1 << 8)
2383 #define BTRFS_INODE_NOATIME (1 << 9)
2384 #define BTRFS_INODE_DIRSYNC (1 << 10)
2385 #define BTRFS_INODE_COMPRESS (1 << 11)
2387 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2389 struct btrfs_map_token
{
2390 struct extent_buffer
*eb
;
2392 unsigned long offset
;
2395 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
2396 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
2398 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
2400 token
->kaddr
= NULL
;
2403 /* some macros to generate set/get funcs for the struct fields. This
2404 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2407 #define le8_to_cpu(v) (v)
2408 #define cpu_to_le8(v) (v)
2411 #define read_eb_member(eb, ptr, type, member, result) ( \
2412 read_extent_buffer(eb, (char *)(result), \
2413 ((unsigned long)(ptr)) + \
2414 offsetof(type, member), \
2415 sizeof(((type *)0)->member)))
2417 #define write_eb_member(eb, ptr, type, member, result) ( \
2418 write_extent_buffer(eb, (char *)(result), \
2419 ((unsigned long)(ptr)) + \
2420 offsetof(type, member), \
2421 sizeof(((type *)0)->member)))
2423 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2424 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2425 unsigned long off, \
2426 struct btrfs_map_token *token); \
2427 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2428 unsigned long off, u##bits val, \
2429 struct btrfs_map_token *token); \
2430 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2431 unsigned long off) \
2433 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2435 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2436 unsigned long off, u##bits val) \
2438 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2441 DECLARE_BTRFS_SETGET_BITS(8)
2442 DECLARE_BTRFS_SETGET_BITS(16)
2443 DECLARE_BTRFS_SETGET_BITS(32)
2444 DECLARE_BTRFS_SETGET_BITS(64)
2446 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2447 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2449 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2450 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2452 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2455 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2456 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2458 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2459 struct btrfs_map_token *token) \
2461 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2462 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2464 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2465 type *s, u##bits val, \
2466 struct btrfs_map_token *token) \
2468 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2469 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2472 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2473 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2475 type *p = page_address(eb->pages[0]); \
2476 u##bits res = le##bits##_to_cpu(p->member); \
2479 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2482 type *p = page_address(eb->pages[0]); \
2483 p->member = cpu_to_le##bits(val); \
2486 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2487 static inline u##bits btrfs_##name(type *s) \
2489 return le##bits##_to_cpu(s->member); \
2491 static inline void btrfs_set_##name(type *s, u##bits val) \
2493 s->member = cpu_to_le##bits(val); \
2496 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
2497 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
2498 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
2499 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
2500 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
2501 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
2503 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
2504 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
2505 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
2506 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
2507 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
2508 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
2510 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
2511 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
2513 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
2515 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
2517 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
2519 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
2521 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
2522 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
2524 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
2526 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
2528 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
2531 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
2533 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
2536 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
2538 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
2541 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
2542 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
2543 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
2544 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
2545 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
2546 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
2547 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
2548 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
2549 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
2550 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
2551 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
2553 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
2555 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
2558 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
2559 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
2560 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
2562 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
2564 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
2566 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
2568 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
2569 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
2571 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
2573 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
2574 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
2576 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
2579 unsigned long offset
= (unsigned long)c
;
2580 offset
+= offsetof(struct btrfs_chunk
, stripe
);
2581 offset
+= nr
* sizeof(struct btrfs_stripe
);
2582 return (struct btrfs_stripe
*)offset
;
2585 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
2587 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
2590 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
2591 struct btrfs_chunk
*c
, int nr
)
2593 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
2596 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
2597 struct btrfs_chunk
*c
, int nr
)
2599 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
2602 /* struct btrfs_block_group_item */
2603 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
2605 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
2607 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
2608 struct btrfs_block_group_item
, chunk_objectid
, 64);
2610 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
2611 struct btrfs_block_group_item
, chunk_objectid
, 64);
2612 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
2613 struct btrfs_block_group_item
, flags
, 64);
2614 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
2615 struct btrfs_block_group_item
, flags
, 64);
2617 /* struct btrfs_free_space_info */
2618 BTRFS_SETGET_FUNCS(free_space_extent_count
, struct btrfs_free_space_info
,
2620 BTRFS_SETGET_FUNCS(free_space_flags
, struct btrfs_free_space_info
, flags
, 32);
2622 /* struct btrfs_inode_ref */
2623 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
2624 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
2626 /* struct btrfs_inode_extref */
2627 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
2628 parent_objectid
, 64);
2629 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
2631 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
2633 /* struct btrfs_inode_item */
2634 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
2635 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
2636 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
2637 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
2638 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
2639 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
2640 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2641 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
2642 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
2643 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
2644 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2645 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
2646 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
2648 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
2650 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
2652 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
2653 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
2655 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
2657 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2658 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
2659 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
2660 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
2661 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2662 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
2663 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
2664 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2665 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
2666 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2668 /* struct btrfs_dev_extent */
2669 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
2671 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
2672 chunk_objectid
, 64);
2673 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
2675 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
2677 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
2679 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
2680 return (unsigned long)dev
+ ptr
;
2683 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
2684 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
2686 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
2688 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
2691 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
2693 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
2694 struct btrfs_tree_block_info
*item
,
2695 struct btrfs_disk_key
*key
)
2697 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2700 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
2701 struct btrfs_tree_block_info
*item
,
2702 struct btrfs_disk_key
*key
)
2704 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2707 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
2709 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
2711 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
2713 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
2716 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
2719 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
2721 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
2724 static inline u32
btrfs_extent_inline_ref_size(int type
)
2726 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
2727 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
2728 return sizeof(struct btrfs_extent_inline_ref
);
2729 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
2730 return sizeof(struct btrfs_shared_data_ref
) +
2731 sizeof(struct btrfs_extent_inline_ref
);
2732 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
2733 return sizeof(struct btrfs_extent_data_ref
) +
2734 offsetof(struct btrfs_extent_inline_ref
, offset
);
2739 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
2740 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
2742 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
2743 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
2745 /* struct btrfs_node */
2746 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
2747 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
2748 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
2750 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
2753 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
2756 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2757 sizeof(struct btrfs_key_ptr
) * nr
;
2758 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
2761 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
2765 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2766 sizeof(struct btrfs_key_ptr
) * nr
;
2767 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2770 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
2773 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2774 sizeof(struct btrfs_key_ptr
) * nr
;
2775 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
2778 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
2782 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2783 sizeof(struct btrfs_key_ptr
) * nr
;
2784 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2787 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
2789 return offsetof(struct btrfs_node
, ptrs
) +
2790 sizeof(struct btrfs_key_ptr
) * nr
;
2793 void btrfs_node_key(struct extent_buffer
*eb
,
2794 struct btrfs_disk_key
*disk_key
, int nr
);
2796 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
2797 struct btrfs_disk_key
*disk_key
, int nr
)
2800 ptr
= btrfs_node_key_ptr_offset(nr
);
2801 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
2802 struct btrfs_key_ptr
, key
, disk_key
);
2805 /* struct btrfs_item */
2806 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
2807 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
2808 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
2809 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
2811 static inline unsigned long btrfs_item_nr_offset(int nr
)
2813 return offsetof(struct btrfs_leaf
, items
) +
2814 sizeof(struct btrfs_item
) * nr
;
2817 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
2819 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
2822 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
2823 struct btrfs_item
*item
)
2825 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
2828 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
2830 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
2833 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
2835 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
2838 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
2840 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
2843 static inline void btrfs_item_key(struct extent_buffer
*eb
,
2844 struct btrfs_disk_key
*disk_key
, int nr
)
2846 struct btrfs_item
*item
= btrfs_item_nr(nr
);
2847 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2850 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
2851 struct btrfs_disk_key
*disk_key
, int nr
)
2853 struct btrfs_item
*item
= btrfs_item_nr(nr
);
2854 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2857 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
2860 * struct btrfs_root_ref
2862 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
2863 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
2864 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
2866 /* struct btrfs_dir_item */
2867 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2868 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2869 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2870 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2871 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
2872 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
2874 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
2876 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
2879 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
2880 struct btrfs_dir_item
*item
,
2881 struct btrfs_disk_key
*key
)
2883 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2886 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2887 struct btrfs_dir_item
*item
,
2888 struct btrfs_disk_key
*key
)
2890 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2893 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2895 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2897 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2900 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
2901 struct btrfs_free_space_header
*h
,
2902 struct btrfs_disk_key
*key
)
2904 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2907 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2908 struct btrfs_free_space_header
*h
,
2909 struct btrfs_disk_key
*key
)
2911 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2914 /* struct btrfs_disk_key */
2915 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2917 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2918 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2920 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2921 struct btrfs_disk_key
*disk
)
2923 cpu
->offset
= le64_to_cpu(disk
->offset
);
2924 cpu
->type
= disk
->type
;
2925 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2928 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2929 struct btrfs_key
*cpu
)
2931 disk
->offset
= cpu_to_le64(cpu
->offset
);
2932 disk
->type
= cpu
->type
;
2933 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2936 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2937 struct btrfs_key
*key
, int nr
)
2939 struct btrfs_disk_key disk_key
;
2940 btrfs_node_key(eb
, &disk_key
, nr
);
2941 btrfs_disk_key_to_cpu(key
, &disk_key
);
2944 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2945 struct btrfs_key
*key
, int nr
)
2947 struct btrfs_disk_key disk_key
;
2948 btrfs_item_key(eb
, &disk_key
, nr
);
2949 btrfs_disk_key_to_cpu(key
, &disk_key
);
2952 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2953 struct btrfs_dir_item
*item
,
2954 struct btrfs_key
*key
)
2956 struct btrfs_disk_key disk_key
;
2957 btrfs_dir_item_key(eb
, item
, &disk_key
);
2958 btrfs_disk_key_to_cpu(key
, &disk_key
);
2962 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2967 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2972 /* struct btrfs_header */
2973 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2974 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2976 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2977 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2978 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2979 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2980 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
2982 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
2983 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
2985 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
2987 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2989 return (btrfs_header_flags(eb
) & flag
) == flag
;
2992 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2994 u64 flags
= btrfs_header_flags(eb
);
2995 btrfs_set_header_flags(eb
, flags
| flag
);
2996 return (flags
& flag
) == flag
;
2999 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
3001 u64 flags
= btrfs_header_flags(eb
);
3002 btrfs_set_header_flags(eb
, flags
& ~flag
);
3003 return (flags
& flag
) == flag
;
3006 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
3008 u64 flags
= btrfs_header_flags(eb
);
3009 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
3012 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
3015 u64 flags
= btrfs_header_flags(eb
);
3016 flags
&= ~BTRFS_BACKREF_REV_MASK
;
3017 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
3018 btrfs_set_header_flags(eb
, flags
);
3021 static inline unsigned long btrfs_header_fsid(void)
3023 return offsetof(struct btrfs_header
, fsid
);
3026 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
3028 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
3031 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
3033 return btrfs_header_level(eb
) == 0;
3036 /* struct btrfs_root_item */
3037 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
3039 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
3040 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
3041 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
3043 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
3045 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
3046 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
3047 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
3048 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
3049 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
3050 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
3051 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
3052 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
3054 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
3056 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
3058 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
3060 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
3062 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
3065 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
3067 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
3070 static inline bool btrfs_root_dead(struct btrfs_root
*root
)
3072 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD
)) != 0;
3075 /* struct btrfs_root_backup */
3076 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
3078 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
3080 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
3081 tree_root_level
, 8);
3083 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
3085 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
3086 chunk_root_gen
, 64);
3087 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
3088 chunk_root_level
, 8);
3090 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
3092 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
3093 extent_root_gen
, 64);
3094 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
3095 extent_root_level
, 8);
3097 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
3099 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
3101 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
3104 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
3106 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
3108 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
3111 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
3113 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
3115 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
3116 csum_root_level
, 8);
3117 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
3119 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
3121 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
3124 /* struct btrfs_balance_item */
3125 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
3127 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
3128 struct btrfs_balance_item
*bi
,
3129 struct btrfs_disk_balance_args
*ba
)
3131 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
3134 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
3135 struct btrfs_balance_item
*bi
,
3136 struct btrfs_disk_balance_args
*ba
)
3138 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
3141 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
3142 struct btrfs_balance_item
*bi
,
3143 struct btrfs_disk_balance_args
*ba
)
3145 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
3148 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
3149 struct btrfs_balance_item
*bi
,
3150 struct btrfs_disk_balance_args
*ba
)
3152 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
3155 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
3156 struct btrfs_balance_item
*bi
,
3157 struct btrfs_disk_balance_args
*ba
)
3159 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
3162 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
3163 struct btrfs_balance_item
*bi
,
3164 struct btrfs_disk_balance_args
*ba
)
3166 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
3170 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
3171 struct btrfs_disk_balance_args
*disk
)
3173 memset(cpu
, 0, sizeof(*cpu
));
3175 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
3176 cpu
->usage
= le64_to_cpu(disk
->usage
);
3177 cpu
->devid
= le64_to_cpu(disk
->devid
);
3178 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
3179 cpu
->pend
= le64_to_cpu(disk
->pend
);
3180 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
3181 cpu
->vend
= le64_to_cpu(disk
->vend
);
3182 cpu
->target
= le64_to_cpu(disk
->target
);
3183 cpu
->flags
= le64_to_cpu(disk
->flags
);
3184 cpu
->limit
= le64_to_cpu(disk
->limit
);
3188 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
3189 struct btrfs_balance_args
*cpu
)
3191 memset(disk
, 0, sizeof(*disk
));
3193 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
3194 disk
->usage
= cpu_to_le64(cpu
->usage
);
3195 disk
->devid
= cpu_to_le64(cpu
->devid
);
3196 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
3197 disk
->pend
= cpu_to_le64(cpu
->pend
);
3198 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
3199 disk
->vend
= cpu_to_le64(cpu
->vend
);
3200 disk
->target
= cpu_to_le64(cpu
->target
);
3201 disk
->flags
= cpu_to_le64(cpu
->flags
);
3202 disk
->limit
= cpu_to_le64(cpu
->limit
);
3205 /* struct btrfs_super_block */
3206 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
3207 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
3208 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
3210 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
3211 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
3212 struct btrfs_super_block
, sys_chunk_array_size
, 32);
3213 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
3214 struct btrfs_super_block
, chunk_root_generation
, 64);
3215 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
3217 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
3219 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
3220 chunk_root_level
, 8);
3221 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
3223 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
3224 log_root_transid
, 64);
3225 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
3227 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
3229 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
3231 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
3233 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
3235 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
3237 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
3238 root_dir_objectid
, 64);
3239 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
3241 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
3243 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
3244 compat_ro_flags
, 64);
3245 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
3246 incompat_flags
, 64);
3247 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
3249 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
3250 cache_generation
, 64);
3251 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
3252 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
3253 uuid_tree_generation
, 64);
3255 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
3257 u16 t
= btrfs_super_csum_type(s
);
3259 * csum type is validated at mount time
3261 return btrfs_csum_sizes
[t
];
3264 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
3266 return offsetof(struct btrfs_leaf
, items
);
3269 /* struct btrfs_file_extent_item */
3270 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
3271 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
3272 struct btrfs_file_extent_item
, disk_bytenr
, 64);
3273 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
3274 struct btrfs_file_extent_item
, offset
, 64);
3275 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
3276 struct btrfs_file_extent_item
, generation
, 64);
3277 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
3278 struct btrfs_file_extent_item
, num_bytes
, 64);
3279 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
3280 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
3281 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
3282 struct btrfs_file_extent_item
, compression
, 8);
3284 static inline unsigned long
3285 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
3287 return (unsigned long)e
+ BTRFS_FILE_EXTENT_INLINE_DATA_START
;
3290 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
3292 return BTRFS_FILE_EXTENT_INLINE_DATA_START
+ datasize
;
3295 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
3297 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
3299 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
3300 disk_num_bytes
, 64);
3301 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
3303 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
3305 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
3307 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
3309 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
3311 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
3312 other_encoding
, 16);
3315 * this returns the number of bytes used by the item on disk, minus the
3316 * size of any extent headers. If a file is compressed on disk, this is
3317 * the compressed size
3319 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
3320 struct btrfs_item
*e
)
3322 return btrfs_item_size(eb
, e
) - BTRFS_FILE_EXTENT_INLINE_DATA_START
;
3325 /* this returns the number of file bytes represented by the inline item.
3326 * If an item is compressed, this is the uncompressed size
3328 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
3330 struct btrfs_file_extent_item
*fi
)
3332 struct btrfs_map_token token
;
3334 btrfs_init_map_token(&token
);
3336 * return the space used on disk if this item isn't
3337 * compressed or encoded
3339 if (btrfs_token_file_extent_compression(eb
, fi
, &token
) == 0 &&
3340 btrfs_token_file_extent_encryption(eb
, fi
, &token
) == 0 &&
3341 btrfs_token_file_extent_other_encoding(eb
, fi
, &token
) == 0) {
3342 return btrfs_file_extent_inline_item_len(eb
,
3343 btrfs_item_nr(slot
));
3346 /* otherwise use the ram bytes field */
3347 return btrfs_token_file_extent_ram_bytes(eb
, fi
, &token
);
3351 /* btrfs_dev_stats_item */
3352 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
3353 struct btrfs_dev_stats_item
*ptr
,
3358 read_extent_buffer(eb
, &val
,
3359 offsetof(struct btrfs_dev_stats_item
, values
) +
3360 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
3365 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
3366 struct btrfs_dev_stats_item
*ptr
,
3369 write_extent_buffer(eb
, &val
,
3370 offsetof(struct btrfs_dev_stats_item
, values
) +
3371 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
3375 /* btrfs_qgroup_status_item */
3376 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
3378 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
3380 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
3382 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
3385 /* btrfs_qgroup_info_item */
3386 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
3388 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
3389 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
3391 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
3392 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
3395 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
3396 struct btrfs_qgroup_info_item
, generation
, 64);
3397 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
3399 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
3400 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
3401 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
3403 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
3404 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
3406 /* btrfs_qgroup_limit_item */
3407 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
3409 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
3411 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
3413 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
3415 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
3418 /* btrfs_dev_replace_item */
3419 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
3420 struct btrfs_dev_replace_item
, src_devid
, 64);
3421 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
3422 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
3424 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
3426 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
3428 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
3430 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
3431 num_write_errors
, 64);
3432 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
3433 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
3435 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
3437 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
3440 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
3441 struct btrfs_dev_replace_item
, src_devid
, 64);
3442 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
3443 struct btrfs_dev_replace_item
,
3444 cont_reading_from_srcdev_mode
, 64);
3445 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
3446 struct btrfs_dev_replace_item
, replace_state
, 64);
3447 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
3448 struct btrfs_dev_replace_item
, time_started
, 64);
3449 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
3450 struct btrfs_dev_replace_item
, time_stopped
, 64);
3451 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
3452 struct btrfs_dev_replace_item
, num_write_errors
, 64);
3453 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
3454 struct btrfs_dev_replace_item
,
3455 num_uncorrectable_read_errors
, 64);
3456 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
3457 struct btrfs_dev_replace_item
, cursor_left
, 64);
3458 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
3459 struct btrfs_dev_replace_item
, cursor_right
, 64);
3461 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
3463 return sb
->s_fs_info
;
3466 /* helper function to cast into the data area of the leaf. */
3467 #define btrfs_item_ptr(leaf, slot, type) \
3468 ((type *)(btrfs_leaf_data(leaf) + \
3469 btrfs_item_offset_nr(leaf, slot)))
3471 #define btrfs_item_ptr_offset(leaf, slot) \
3472 ((unsigned long)(btrfs_leaf_data(leaf) + \
3473 btrfs_item_offset_nr(leaf, slot)))
3475 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
3477 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
3478 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
3481 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
3483 return mapping_gfp_constraint(mapping
, ~__GFP_FS
);
3488 u64
btrfs_csum_bytes_to_leaves(struct btrfs_root
*root
, u64 csum_bytes
);
3490 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
3493 return root
->nodesize
* BTRFS_MAX_LEVEL
* 2 * num_items
;
3497 * Doing a truncate won't result in new nodes or leaves, just what we need for
3500 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
3503 return root
->nodesize
* BTRFS_MAX_LEVEL
* num_items
;
3506 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle
*trans
,
3507 struct btrfs_root
*root
);
3508 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle
*trans
,
3509 struct btrfs_root
*root
);
3510 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
3511 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
3512 struct btrfs_root
*root
, unsigned long count
);
3513 int btrfs_async_run_delayed_refs(struct btrfs_root
*root
,
3514 unsigned long count
, int wait
);
3515 int btrfs_lookup_data_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
3516 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
3517 struct btrfs_root
*root
, u64 bytenr
,
3518 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
3519 int btrfs_pin_extent(struct btrfs_root
*root
,
3520 u64 bytenr
, u64 num
, int reserved
);
3521 int btrfs_pin_extent_for_log_replay(struct btrfs_root
*root
,
3522 u64 bytenr
, u64 num_bytes
);
3523 int btrfs_exclude_logged_extents(struct btrfs_root
*root
,
3524 struct extent_buffer
*eb
);
3525 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
3526 struct btrfs_root
*root
,
3527 u64 objectid
, u64 offset
, u64 bytenr
);
3528 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
3529 struct btrfs_fs_info
*info
,
3531 void btrfs_get_block_group(struct btrfs_block_group_cache
*cache
);
3532 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
3533 int get_block_group_index(struct btrfs_block_group_cache
*cache
);
3534 struct extent_buffer
*btrfs_alloc_tree_block(struct btrfs_trans_handle
*trans
,
3535 struct btrfs_root
*root
, u64 parent
,
3537 struct btrfs_disk_key
*key
, int level
,
3538 u64 hint
, u64 empty_size
);
3539 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
3540 struct btrfs_root
*root
,
3541 struct extent_buffer
*buf
,
3542 u64 parent
, int last_ref
);
3543 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
3544 struct btrfs_root
*root
,
3545 u64 root_objectid
, u64 owner
,
3546 u64 offset
, u64 ram_bytes
,
3547 struct btrfs_key
*ins
);
3548 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
3549 struct btrfs_root
*root
,
3550 u64 root_objectid
, u64 owner
, u64 offset
,
3551 struct btrfs_key
*ins
);
3552 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 num_bytes
,
3553 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
3554 struct btrfs_key
*ins
, int is_data
, int delalloc
);
3555 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3556 struct extent_buffer
*buf
, int full_backref
);
3557 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3558 struct extent_buffer
*buf
, int full_backref
);
3559 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
3560 struct btrfs_root
*root
,
3561 u64 bytenr
, u64 num_bytes
, u64 flags
,
3562 int level
, int is_data
);
3563 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
3564 struct btrfs_root
*root
,
3565 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
3566 u64 owner
, u64 offset
);
3568 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
,
3570 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
3571 u64 start
, u64 len
);
3572 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
3573 struct btrfs_root
*root
);
3574 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
3575 struct btrfs_root
*root
);
3576 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
3577 struct btrfs_root
*root
,
3578 u64 bytenr
, u64 num_bytes
, u64 parent
,
3579 u64 root_objectid
, u64 owner
, u64 offset
);
3581 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle
*trans
,
3582 struct btrfs_root
*root
);
3583 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
3584 struct btrfs_root
*root
);
3585 int btrfs_setup_space_cache(struct btrfs_trans_handle
*trans
,
3586 struct btrfs_root
*root
);
3587 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
3588 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
3589 int btrfs_read_block_groups(struct btrfs_root
*root
);
3590 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
3591 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
3592 struct btrfs_root
*root
, u64 bytes_used
,
3593 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
3595 struct btrfs_trans_handle
*btrfs_start_trans_remove_block_group(
3596 struct btrfs_fs_info
*fs_info
,
3597 const u64 chunk_offset
);
3598 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
3599 struct btrfs_root
*root
, u64 group_start
,
3600 struct extent_map
*em
);
3601 void btrfs_delete_unused_bgs(struct btrfs_fs_info
*fs_info
);
3602 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache
*cache
);
3603 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache
*cache
);
3604 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
3605 struct btrfs_root
*root
);
3606 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
3607 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
3609 enum btrfs_reserve_flush_enum
{
3610 /* If we are in the transaction, we can't flush anything.*/
3611 BTRFS_RESERVE_NO_FLUSH
,
3613 * Flushing delalloc may cause deadlock somewhere, in this
3614 * case, use FLUSH LIMIT
3616 BTRFS_RESERVE_FLUSH_LIMIT
,
3617 BTRFS_RESERVE_FLUSH_ALL
,
3620 int btrfs_check_data_free_space(struct inode
*inode
, u64 start
, u64 len
);
3621 int btrfs_alloc_data_chunk_ondemand(struct inode
*inode
, u64 bytes
);
3622 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 start
, u64 len
);
3623 void btrfs_free_reserved_data_space_noquota(struct inode
*inode
, u64 start
,
3625 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
3626 struct btrfs_root
*root
);
3627 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle
*trans
);
3628 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
3629 struct inode
*inode
);
3630 void btrfs_orphan_release_metadata(struct inode
*inode
);
3631 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
3632 struct btrfs_block_rsv
*rsv
,
3634 u64
*qgroup_reserved
, bool use_global_rsv
);
3635 void btrfs_subvolume_release_metadata(struct btrfs_root
*root
,
3636 struct btrfs_block_rsv
*rsv
,
3637 u64 qgroup_reserved
);
3638 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
3639 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
3640 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 start
, u64 len
);
3641 void btrfs_delalloc_release_space(struct inode
*inode
, u64 start
, u64 len
);
3642 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
3643 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
3644 unsigned short type
);
3645 void btrfs_free_block_rsv(struct btrfs_root
*root
,
3646 struct btrfs_block_rsv
*rsv
);
3647 void __btrfs_free_block_rsv(struct btrfs_block_rsv
*rsv
);
3648 int btrfs_block_rsv_add(struct btrfs_root
*root
,
3649 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
3650 enum btrfs_reserve_flush_enum flush
);
3651 int btrfs_block_rsv_check(struct btrfs_root
*root
,
3652 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
3653 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
3654 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
3655 enum btrfs_reserve_flush_enum flush
);
3656 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
3657 struct btrfs_block_rsv
*dst_rsv
,
3659 int btrfs_cond_migrate_bytes(struct btrfs_fs_info
*fs_info
,
3660 struct btrfs_block_rsv
*dest
, u64 num_bytes
,
3662 void btrfs_block_rsv_release(struct btrfs_root
*root
,
3663 struct btrfs_block_rsv
*block_rsv
,
3665 int btrfs_inc_block_group_ro(struct btrfs_root
*root
,
3666 struct btrfs_block_group_cache
*cache
);
3667 void btrfs_dec_block_group_ro(struct btrfs_root
*root
,
3668 struct btrfs_block_group_cache
*cache
);
3669 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
3670 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
3671 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
3672 u64 start
, u64 end
);
3673 int btrfs_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
3674 u64 num_bytes
, u64
*actual_bytes
);
3675 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
3676 struct btrfs_root
*root
, u64 type
);
3677 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
3679 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
3680 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
3681 struct btrfs_fs_info
*fs_info
);
3682 int __get_raid_index(u64 flags
);
3683 int btrfs_start_write_no_snapshoting(struct btrfs_root
*root
);
3684 void btrfs_end_write_no_snapshoting(struct btrfs_root
*root
);
3685 void btrfs_wait_for_snapshot_creation(struct btrfs_root
*root
);
3686 void check_system_chunk(struct btrfs_trans_handle
*trans
,
3687 struct btrfs_root
*root
,
3689 u64
add_new_free_space(struct btrfs_block_group_cache
*block_group
,
3690 struct btrfs_fs_info
*info
, u64 start
, u64 end
);
3693 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
3694 int level
, int *slot
);
3695 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
3696 int btrfs_previous_item(struct btrfs_root
*root
,
3697 struct btrfs_path
*path
, u64 min_objectid
,
3699 int btrfs_previous_extent_item(struct btrfs_root
*root
,
3700 struct btrfs_path
*path
, u64 min_objectid
);
3701 void btrfs_set_item_key_safe(struct btrfs_fs_info
*fs_info
,
3702 struct btrfs_path
*path
,
3703 struct btrfs_key
*new_key
);
3704 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
3705 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
3706 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
3707 struct btrfs_key
*key
, int lowest_level
,
3709 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
3710 struct btrfs_path
*path
,
3712 enum btrfs_compare_tree_result
{
3713 BTRFS_COMPARE_TREE_NEW
,
3714 BTRFS_COMPARE_TREE_DELETED
,
3715 BTRFS_COMPARE_TREE_CHANGED
,
3716 BTRFS_COMPARE_TREE_SAME
,
3718 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
3719 struct btrfs_root
*right_root
,
3720 struct btrfs_path
*left_path
,
3721 struct btrfs_path
*right_path
,
3722 struct btrfs_key
*key
,
3723 enum btrfs_compare_tree_result result
,
3725 int btrfs_compare_trees(struct btrfs_root
*left_root
,
3726 struct btrfs_root
*right_root
,
3727 btrfs_changed_cb_t cb
, void *ctx
);
3728 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
3729 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3730 struct extent_buffer
*parent
, int parent_slot
,
3731 struct extent_buffer
**cow_ret
);
3732 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
3733 struct btrfs_root
*root
,
3734 struct extent_buffer
*buf
,
3735 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
3736 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
3737 struct extent_buffer
*buf
);
3738 void btrfs_extend_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
3740 void btrfs_truncate_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
3741 u32 new_size
, int from_end
);
3742 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
3743 struct btrfs_root
*root
,
3744 struct btrfs_path
*path
,
3745 struct btrfs_key
*new_key
,
3746 unsigned long split_offset
);
3747 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
3748 struct btrfs_root
*root
,
3749 struct btrfs_path
*path
,
3750 struct btrfs_key
*new_key
);
3751 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*path
,
3752 u64 inum
, u64 ioff
, u8 key_type
, struct btrfs_key
*found_key
);
3753 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
3754 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
3756 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
3757 struct btrfs_path
*p
, u64 time_seq
);
3758 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
3759 struct btrfs_key
*key
, struct btrfs_path
*p
,
3760 int find_higher
, int return_any
);
3761 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
3762 struct btrfs_root
*root
, struct extent_buffer
*parent
,
3763 int start_slot
, u64
*last_ret
,
3764 struct btrfs_key
*progress
);
3765 void btrfs_release_path(struct btrfs_path
*p
);
3766 struct btrfs_path
*btrfs_alloc_path(void);
3767 void btrfs_free_path(struct btrfs_path
*p
);
3768 void btrfs_set_path_blocking(struct btrfs_path
*p
);
3769 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
3770 struct extent_buffer
*held
, int held_rw
);
3771 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
3773 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3774 struct btrfs_path
*path
, int slot
, int nr
);
3775 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
3776 struct btrfs_root
*root
,
3777 struct btrfs_path
*path
)
3779 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
3782 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
3783 struct btrfs_key
*cpu_key
, u32
*data_size
,
3784 u32 total_data
, u32 total_size
, int nr
);
3785 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
3786 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
3787 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
3788 struct btrfs_root
*root
,
3789 struct btrfs_path
*path
,
3790 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
3792 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
3793 struct btrfs_root
*root
,
3794 struct btrfs_path
*path
,
3795 struct btrfs_key
*key
,
3798 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
3801 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3802 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3803 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
3805 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
3806 struct btrfs_path
*p
, u64 time_seq
)
3809 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
3810 return btrfs_next_old_leaf(root
, p
, time_seq
);
3813 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
3815 return btrfs_next_old_item(root
, p
, 0);
3817 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
3818 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
3819 struct btrfs_block_rsv
*block_rsv
,
3820 int update_ref
, int for_reloc
);
3821 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
3822 struct btrfs_root
*root
,
3823 struct extent_buffer
*node
,
3824 struct extent_buffer
*parent
);
3825 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
3828 * Get synced with close_ctree()
3831 return fs_info
->closing
;
3835 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3836 * anything except sleeping. This function is used to check the status of
3839 static inline int btrfs_need_cleaner_sleep(struct btrfs_root
*root
)
3841 return (root
->fs_info
->sb
->s_flags
& MS_RDONLY
||
3842 btrfs_fs_closing(root
->fs_info
));
3845 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
3847 kfree(fs_info
->balance_ctl
);
3848 kfree(fs_info
->delayed_root
);
3849 kfree(fs_info
->extent_root
);
3850 kfree(fs_info
->tree_root
);
3851 kfree(fs_info
->chunk_root
);
3852 kfree(fs_info
->dev_root
);
3853 kfree(fs_info
->csum_root
);
3854 kfree(fs_info
->quota_root
);
3855 kfree(fs_info
->uuid_root
);
3856 kfree(fs_info
->free_space_root
);
3857 kfree(fs_info
->super_copy
);
3858 kfree(fs_info
->super_for_commit
);
3859 security_free_mnt_opts(&fs_info
->security_opts
);
3863 /* tree mod log functions from ctree.c */
3864 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3865 struct seq_list
*elem
);
3866 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3867 struct seq_list
*elem
);
3868 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
3871 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
3872 struct btrfs_path
*path
,
3873 u64 root_id
, u64 ref_id
);
3874 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
3875 struct btrfs_root
*tree_root
,
3876 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
3877 const char *name
, int name_len
);
3878 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
3879 struct btrfs_root
*tree_root
,
3880 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
3881 const char *name
, int name_len
);
3882 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3883 struct btrfs_key
*key
);
3884 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
3885 *root
, struct btrfs_key
*key
, struct btrfs_root_item
3887 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
3888 struct btrfs_root
*root
,
3889 struct btrfs_key
*key
,
3890 struct btrfs_root_item
*item
);
3891 int btrfs_find_root(struct btrfs_root
*root
, struct btrfs_key
*search_key
,
3892 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
3893 struct btrfs_key
*root_key
);
3894 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
3895 void btrfs_set_root_node(struct btrfs_root_item
*item
,
3896 struct extent_buffer
*node
);
3897 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
3898 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
3899 struct btrfs_root
*root
);
3902 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
,
3903 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
3905 int btrfs_uuid_tree_rem(struct btrfs_trans_handle
*trans
,
3906 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
3908 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
,
3909 int (*check_func
)(struct btrfs_fs_info
*, u8
*, u8
,
3913 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
3914 const char *name
, int name_len
);
3915 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
3916 struct btrfs_root
*root
, const char *name
,
3917 int name_len
, struct inode
*dir
,
3918 struct btrfs_key
*location
, u8 type
, u64 index
);
3919 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3920 struct btrfs_root
*root
,
3921 struct btrfs_path
*path
, u64 dir
,
3922 const char *name
, int name_len
,
3924 struct btrfs_dir_item
*
3925 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3926 struct btrfs_root
*root
,
3927 struct btrfs_path
*path
, u64 dir
,
3928 u64 objectid
, const char *name
, int name_len
,
3930 struct btrfs_dir_item
*
3931 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3932 struct btrfs_path
*path
, u64 dirid
,
3933 const char *name
, int name_len
);
3934 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3935 struct btrfs_root
*root
,
3936 struct btrfs_path
*path
,
3937 struct btrfs_dir_item
*di
);
3938 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3939 struct btrfs_root
*root
,
3940 struct btrfs_path
*path
, u64 objectid
,
3941 const char *name
, u16 name_len
,
3942 const void *data
, u16 data_len
);
3943 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3944 struct btrfs_root
*root
,
3945 struct btrfs_path
*path
, u64 dir
,
3946 const char *name
, u16 name_len
,
3948 int verify_dir_item(struct btrfs_root
*root
,
3949 struct extent_buffer
*leaf
,
3950 struct btrfs_dir_item
*dir_item
);
3951 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
3952 struct btrfs_path
*path
,
3957 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3958 struct btrfs_root
*root
, u64 offset
);
3959 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3960 struct btrfs_root
*root
, u64 offset
);
3961 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3964 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3965 struct btrfs_root
*root
,
3966 const char *name
, int name_len
,
3967 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3968 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3969 struct btrfs_root
*root
,
3970 const char *name
, int name_len
,
3971 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3972 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3973 struct btrfs_root
*root
,
3974 struct btrfs_path
*path
, u64 objectid
);
3975 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3976 *root
, struct btrfs_path
*path
,
3977 struct btrfs_key
*location
, int mod
);
3979 struct btrfs_inode_extref
*
3980 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3981 struct btrfs_root
*root
,
3982 struct btrfs_path
*path
,
3983 const char *name
, int name_len
,
3984 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3987 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3988 u64 ref_objectid
, const char *name
,
3990 struct btrfs_inode_extref
**extref_ret
);
3993 struct btrfs_dio_private
;
3994 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3995 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3996 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3997 struct bio
*bio
, u32
*dst
);
3998 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3999 struct bio
*bio
, u64 logical_offset
);
4000 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
4001 struct btrfs_root
*root
,
4002 u64 objectid
, u64 pos
,
4003 u64 disk_offset
, u64 disk_num_bytes
,
4004 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
4005 u8 compression
, u8 encryption
, u16 other_encoding
);
4006 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
4007 struct btrfs_root
*root
,
4008 struct btrfs_path
*path
, u64 objectid
,
4009 u64 bytenr
, int mod
);
4010 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
4011 struct btrfs_root
*root
,
4012 struct btrfs_ordered_sum
*sums
);
4013 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
4014 struct bio
*bio
, u64 file_start
, int contig
);
4015 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
4016 struct list_head
*list
, int search_commit
);
4017 void btrfs_extent_item_to_extent_map(struct inode
*inode
,
4018 const struct btrfs_path
*path
,
4019 struct btrfs_file_extent_item
*fi
,
4020 const bool new_inline
,
4021 struct extent_map
*em
);
4024 struct btrfs_delalloc_work
{
4025 struct inode
*inode
;
4027 struct completion completion
;
4028 struct list_head list
;
4029 struct btrfs_work work
;
4032 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
4034 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
4036 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
4037 size_t pg_offset
, u64 start
, u64 len
,
4039 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
4040 u64
*orig_start
, u64
*orig_block_len
,
4043 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
4044 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
4045 #define ClearPageChecked ClearPageFsMisc
4046 #define SetPageChecked SetPageFsMisc
4047 #define PageChecked PageFsMisc
4050 /* This forces readahead on a given range of bytes in an inode */
4051 static inline void btrfs_force_ra(struct address_space
*mapping
,
4052 struct file_ra_state
*ra
, struct file
*file
,
4053 pgoff_t offset
, unsigned long req_size
)
4055 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
4058 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
4059 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
4060 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
4061 struct btrfs_root
*root
,
4062 struct inode
*dir
, struct inode
*inode
,
4063 const char *name
, int name_len
);
4064 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
4065 struct inode
*parent_inode
, struct inode
*inode
,
4066 const char *name
, int name_len
, int add_backref
, u64 index
);
4067 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
4068 struct btrfs_root
*root
,
4069 struct inode
*dir
, u64 objectid
,
4070 const char *name
, int name_len
);
4071 int btrfs_truncate_block(struct inode
*inode
, loff_t from
, loff_t len
,
4073 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
4074 struct btrfs_root
*root
,
4075 struct inode
*inode
, u64 new_size
,
4078 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
4079 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, int delay_iput
,
4081 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
4082 struct extent_state
**cached_state
);
4083 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
4084 struct btrfs_root
*new_root
,
4085 struct btrfs_root
*parent_root
,
4087 int btrfs_merge_bio_hook(int rw
, struct page
*page
, unsigned long offset
,
4088 size_t size
, struct bio
*bio
,
4089 unsigned long bio_flags
);
4090 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
4091 int btrfs_readpage(struct file
*file
, struct page
*page
);
4092 void btrfs_evict_inode(struct inode
*inode
);
4093 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
4094 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
4095 void btrfs_destroy_inode(struct inode
*inode
);
4096 int btrfs_drop_inode(struct inode
*inode
);
4097 int btrfs_init_cachep(void);
4098 void btrfs_destroy_cachep(void);
4099 long btrfs_ioctl_trans_end(struct file
*file
);
4100 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
4101 struct btrfs_root
*root
, int *was_new
);
4102 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
4103 size_t pg_offset
, u64 start
, u64 end
,
4105 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
4106 struct btrfs_root
*root
,
4107 struct inode
*inode
);
4108 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
4109 struct btrfs_root
*root
, struct inode
*inode
);
4110 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
4111 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
4112 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
4113 struct btrfs_root
*root
);
4114 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
4115 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
4116 void btrfs_add_delayed_iput(struct inode
*inode
);
4117 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
4118 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
4119 u64 start
, u64 num_bytes
, u64 min_size
,
4120 loff_t actual_len
, u64
*alloc_hint
);
4121 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
4122 struct btrfs_trans_handle
*trans
, int mode
,
4123 u64 start
, u64 num_bytes
, u64 min_size
,
4124 loff_t actual_len
, u64
*alloc_hint
);
4125 int btrfs_inode_check_errors(struct inode
*inode
);
4126 extern const struct dentry_operations btrfs_dentry_operations
;
4127 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4128 void btrfs_test_inode_set_ops(struct inode
*inode
);
4132 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
4133 void btrfs_update_iflags(struct inode
*inode
);
4134 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
4135 int btrfs_is_empty_uuid(u8
*uuid
);
4136 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
4137 struct btrfs_ioctl_defrag_range_args
*range
,
4138 u64 newer_than
, unsigned long max_pages
);
4139 void btrfs_get_block_group_info(struct list_head
*groups_list
,
4140 struct btrfs_ioctl_space_info
*space
);
4141 void update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
, int lock
,
4142 struct btrfs_ioctl_balance_args
*bargs
);
4143 ssize_t
btrfs_dedupe_file_range(struct file
*src_file
, u64 loff
, u64 olen
,
4144 struct file
*dst_file
, u64 dst_loff
);
4147 int btrfs_auto_defrag_init(void);
4148 void btrfs_auto_defrag_exit(void);
4149 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
4150 struct inode
*inode
);
4151 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
4152 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
4153 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
4154 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
4156 extern const struct file_operations btrfs_file_operations
;
4157 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
4158 struct btrfs_root
*root
, struct inode
*inode
,
4159 struct btrfs_path
*path
, u64 start
, u64 end
,
4160 u64
*drop_end
, int drop_cache
,
4162 u32 extent_item_size
,
4164 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
4165 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
4166 u64 end
, int drop_cache
);
4167 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
4168 struct inode
*inode
, u64 start
, u64 end
);
4169 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
4170 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
4171 struct page
**pages
, size_t num_pages
,
4172 loff_t pos
, size_t write_bytes
,
4173 struct extent_state
**cached
);
4174 int btrfs_fdatawrite_range(struct inode
*inode
, loff_t start
, loff_t end
);
4175 ssize_t
btrfs_copy_file_range(struct file
*file_in
, loff_t pos_in
,
4176 struct file
*file_out
, loff_t pos_out
,
4177 size_t len
, unsigned int flags
);
4178 int btrfs_clone_file_range(struct file
*file_in
, loff_t pos_in
,
4179 struct file
*file_out
, loff_t pos_out
, u64 len
);
4182 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
4183 struct btrfs_root
*root
);
4186 int btrfs_init_sysfs(void);
4187 void btrfs_exit_sysfs(void);
4188 int btrfs_sysfs_add_mounted(struct btrfs_fs_info
*fs_info
);
4189 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info
*fs_info
);
4192 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
4195 int btrfs_parse_options(struct btrfs_root
*root
, char *options
,
4196 unsigned long new_flags
);
4197 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
4199 #ifdef CONFIG_PRINTK
4201 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
4203 static inline __printf(2, 3)
4204 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
4209 #define btrfs_emerg(fs_info, fmt, args...) \
4210 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
4211 #define btrfs_alert(fs_info, fmt, args...) \
4212 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
4213 #define btrfs_crit(fs_info, fmt, args...) \
4214 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
4215 #define btrfs_err(fs_info, fmt, args...) \
4216 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
4217 #define btrfs_warn(fs_info, fmt, args...) \
4218 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
4219 #define btrfs_notice(fs_info, fmt, args...) \
4220 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
4221 #define btrfs_info(fs_info, fmt, args...) \
4222 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
4225 * Wrappers that use printk_in_rcu
4227 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
4228 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
4229 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
4230 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
4231 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
4232 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
4233 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
4234 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
4235 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
4236 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
4237 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
4238 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
4239 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
4240 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
4243 * Wrappers that use a ratelimited printk_in_rcu
4245 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
4246 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
4247 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
4248 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
4249 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
4250 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
4251 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
4252 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
4253 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
4254 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
4255 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
4256 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
4257 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
4258 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
4261 * Wrappers that use a ratelimited printk
4263 #define btrfs_emerg_rl(fs_info, fmt, args...) \
4264 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
4265 #define btrfs_alert_rl(fs_info, fmt, args...) \
4266 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
4267 #define btrfs_crit_rl(fs_info, fmt, args...) \
4268 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
4269 #define btrfs_err_rl(fs_info, fmt, args...) \
4270 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
4271 #define btrfs_warn_rl(fs_info, fmt, args...) \
4272 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
4273 #define btrfs_notice_rl(fs_info, fmt, args...) \
4274 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
4275 #define btrfs_info_rl(fs_info, fmt, args...) \
4276 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
4278 #define btrfs_debug(fs_info, fmt, args...) \
4279 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
4280 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
4281 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
4282 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
4283 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
4284 #define btrfs_debug_rl(fs_info, fmt, args...) \
4285 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
4287 #define btrfs_debug(fs_info, fmt, args...) \
4288 no_printk(KERN_DEBUG fmt, ##args)
4289 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
4290 no_printk(KERN_DEBUG fmt, ##args)
4291 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
4292 no_printk(KERN_DEBUG fmt, ##args)
4293 #define btrfs_debug_rl(fs_info, fmt, args...) \
4294 no_printk(KERN_DEBUG fmt, ##args)
4297 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
4300 btrfs_printk(fs_info, fmt, ##args); \
4301 rcu_read_unlock(); \
4304 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
4306 static DEFINE_RATELIMIT_STATE(_rs, \
4307 DEFAULT_RATELIMIT_INTERVAL, \
4308 DEFAULT_RATELIMIT_BURST); \
4309 if (__ratelimit(&_rs)) \
4310 btrfs_printk(fs_info, fmt, ##args); \
4313 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
4316 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
4317 rcu_read_unlock(); \
4320 #ifdef CONFIG_BTRFS_ASSERT
4323 static inline void assfail(char *expr
, char *file
, int line
)
4325 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
4330 #define ASSERT(expr) \
4331 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
4333 #define ASSERT(expr) ((void)0)
4336 #define btrfs_assert()
4339 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
4340 unsigned int line
, int errno
, const char *fmt
, ...);
4342 const char *btrfs_decode_error(int errno
);
4345 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
4346 struct btrfs_root
*root
, const char *function
,
4347 unsigned int line
, int errno
);
4349 #define btrfs_set_fs_incompat(__fs_info, opt) \
4350 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4352 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
4355 struct btrfs_super_block
*disk_super
;
4358 disk_super
= fs_info
->super_copy
;
4359 features
= btrfs_super_incompat_flags(disk_super
);
4360 if (!(features
& flag
)) {
4361 spin_lock(&fs_info
->super_lock
);
4362 features
= btrfs_super_incompat_flags(disk_super
);
4363 if (!(features
& flag
)) {
4365 btrfs_set_super_incompat_flags(disk_super
, features
);
4366 btrfs_info(fs_info
, "setting %llu feature flag",
4369 spin_unlock(&fs_info
->super_lock
);
4373 #define btrfs_clear_fs_incompat(__fs_info, opt) \
4374 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4376 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info
*fs_info
,
4379 struct btrfs_super_block
*disk_super
;
4382 disk_super
= fs_info
->super_copy
;
4383 features
= btrfs_super_incompat_flags(disk_super
);
4384 if (features
& flag
) {
4385 spin_lock(&fs_info
->super_lock
);
4386 features
= btrfs_super_incompat_flags(disk_super
);
4387 if (features
& flag
) {
4389 btrfs_set_super_incompat_flags(disk_super
, features
);
4390 btrfs_info(fs_info
, "clearing %llu feature flag",
4393 spin_unlock(&fs_info
->super_lock
);
4397 #define btrfs_fs_incompat(fs_info, opt) \
4398 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4400 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
4402 struct btrfs_super_block
*disk_super
;
4403 disk_super
= fs_info
->super_copy
;
4404 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
4407 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
4408 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
4410 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
4413 struct btrfs_super_block
*disk_super
;
4416 disk_super
= fs_info
->super_copy
;
4417 features
= btrfs_super_compat_ro_flags(disk_super
);
4418 if (!(features
& flag
)) {
4419 spin_lock(&fs_info
->super_lock
);
4420 features
= btrfs_super_compat_ro_flags(disk_super
);
4421 if (!(features
& flag
)) {
4423 btrfs_set_super_compat_ro_flags(disk_super
, features
);
4424 btrfs_info(fs_info
, "setting %llu ro feature flag",
4427 spin_unlock(&fs_info
->super_lock
);
4431 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
4432 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
4434 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
4437 struct btrfs_super_block
*disk_super
;
4440 disk_super
= fs_info
->super_copy
;
4441 features
= btrfs_super_compat_ro_flags(disk_super
);
4442 if (features
& flag
) {
4443 spin_lock(&fs_info
->super_lock
);
4444 features
= btrfs_super_compat_ro_flags(disk_super
);
4445 if (features
& flag
) {
4447 btrfs_set_super_compat_ro_flags(disk_super
, features
);
4448 btrfs_info(fs_info
, "clearing %llu ro feature flag",
4451 spin_unlock(&fs_info
->super_lock
);
4455 #define btrfs_fs_compat_ro(fs_info, opt) \
4456 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
4458 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info
*fs_info
, u64 flag
)
4460 struct btrfs_super_block
*disk_super
;
4461 disk_super
= fs_info
->super_copy
;
4462 return !!(btrfs_super_compat_ro_flags(disk_super
) & flag
);
4466 * Call btrfs_abort_transaction as early as possible when an error condition is
4467 * detected, that way the exact line number is reported.
4469 #define btrfs_abort_transaction(trans, root, errno) \
4471 /* Report first abort since mount */ \
4472 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
4473 &((root)->fs_info->fs_state))) { \
4474 WARN(1, KERN_DEBUG \
4475 "BTRFS: Transaction aborted (error %d)\n", \
4478 __btrfs_abort_transaction((trans), (root), __func__, \
4479 __LINE__, (errno)); \
4482 #define btrfs_std_error(fs_info, errno, fmt, args...) \
4484 __btrfs_std_error((fs_info), __func__, __LINE__, \
4485 (errno), fmt, ##args); \
4490 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
4491 unsigned int line
, int errno
, const char *fmt
, ...);
4494 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
4495 * will panic(). Otherwise we BUG() here.
4497 #define btrfs_panic(fs_info, errno, fmt, args...) \
4499 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
4504 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
4505 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
4506 int btrfs_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
4507 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
4508 struct inode
*inode
, struct inode
*dir
);
4510 #define btrfs_get_acl NULL
4511 #define btrfs_set_acl NULL
4512 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
4513 struct inode
*inode
, struct inode
*dir
)
4520 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
4521 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
4522 struct btrfs_root
*root
);
4523 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
4524 struct btrfs_root
*root
);
4525 int btrfs_recover_relocation(struct btrfs_root
*root
);
4526 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
4527 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
4528 struct btrfs_root
*root
, struct extent_buffer
*buf
,
4529 struct extent_buffer
*cow
);
4530 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot
*pending
,
4531 u64
*bytes_to_reserve
);
4532 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
4533 struct btrfs_pending_snapshot
*pending
);
4536 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
4537 u64 end
, struct btrfs_scrub_progress
*progress
,
4538 int readonly
, int is_dev_replace
);
4539 void btrfs_scrub_pause(struct btrfs_root
*root
);
4540 void btrfs_scrub_continue(struct btrfs_root
*root
);
4541 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
4542 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
4543 struct btrfs_device
*dev
);
4544 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
4545 struct btrfs_scrub_progress
*progress
);
4548 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info
*fs_info
);
4549 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info
*fs_info
);
4550 void btrfs_bio_counter_sub(struct btrfs_fs_info
*fs_info
, s64 amount
);
4552 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info
*fs_info
)
4554 btrfs_bio_counter_sub(fs_info
, 1);
4558 struct reada_control
{
4559 struct btrfs_root
*root
; /* tree to prefetch */
4560 struct btrfs_key key_start
;
4561 struct btrfs_key key_end
; /* exclusive */
4564 wait_queue_head_t wait
;
4566 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
4567 struct btrfs_key
*start
, struct btrfs_key
*end
);
4568 int btrfs_reada_wait(void *handle
);
4569 void btrfs_reada_detach(void *handle
);
4570 int btree_readahead_hook(struct btrfs_fs_info
*fs_info
,
4571 struct extent_buffer
*eb
, u64 start
, int err
);
4573 static inline int is_fstree(u64 rootid
)
4575 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
4576 ((s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
&&
4577 !btrfs_qgroup_level(rootid
)))
4582 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
4584 return signal_pending(current
);
4587 /* Sanity test specific functions */
4588 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4589 void btrfs_test_destroy_inode(struct inode
*inode
);
4592 static inline int btrfs_test_is_dummy_root(struct btrfs_root
*root
)
4594 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4595 if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT
, &root
->state
)))