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 "extent_io.h"
39 #include "extent_map.h"
40 #include "async-thread.h"
42 struct btrfs_trans_handle
;
43 struct btrfs_transaction
;
44 struct btrfs_pending_snapshot
;
45 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
46 extern struct kmem_cache
*btrfs_transaction_cachep
;
47 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
48 extern struct kmem_cache
*btrfs_path_cachep
;
49 extern struct kmem_cache
*btrfs_free_space_cachep
;
50 struct btrfs_ordered_sum
;
52 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
53 #define STATIC noinline
55 #define STATIC static noinline
58 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
60 #define BTRFS_MAX_MIRRORS 3
62 #define BTRFS_MAX_LEVEL 8
64 #define BTRFS_COMPAT_EXTENT_TREE_V0
66 /* holds pointers to all of the tree roots */
67 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
69 /* stores information about which extents are in use, and reference counts */
70 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
73 * chunk tree stores translations from logical -> physical block numbering
74 * the super block points to the chunk tree
76 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
79 * stores information about which areas of a given device are in use.
80 * one per device. The tree of tree roots points to the device tree
82 #define BTRFS_DEV_TREE_OBJECTID 4ULL
84 /* one per subvolume, storing files and directories */
85 #define BTRFS_FS_TREE_OBJECTID 5ULL
87 /* directory objectid inside the root tree */
88 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
90 /* holds checksums of all the data extents */
91 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
93 /* holds quota configuration and tracking */
94 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
96 /* for storing items that use the BTRFS_UUID_KEY* types */
97 #define BTRFS_UUID_TREE_OBJECTID 9ULL
99 /* for storing balance parameters in the root tree */
100 #define BTRFS_BALANCE_OBJECTID -4ULL
102 /* orhpan objectid for tracking unlinked/truncated files */
103 #define BTRFS_ORPHAN_OBJECTID -5ULL
105 /* does write ahead logging to speed up fsyncs */
106 #define BTRFS_TREE_LOG_OBJECTID -6ULL
107 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
109 /* for space balancing */
110 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
111 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
114 * extent checksums all have this objectid
115 * this allows them to share the logging tree
118 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
120 /* For storing free space cache */
121 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
124 * The inode number assigned to the special inode for storing
127 #define BTRFS_FREE_INO_OBJECTID -12ULL
129 /* dummy objectid represents multiple objectids */
130 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
133 * All files have objectids in this range.
135 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
136 #define BTRFS_LAST_FREE_OBJECTID -256ULL
137 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
141 * the device items go into the chunk tree. The key is in the form
142 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
144 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
146 #define BTRFS_BTREE_INODE_OBJECTID 1
148 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
150 #define BTRFS_DEV_REPLACE_DEVID 0ULL
153 * the max metadata block size. This limit is somewhat artificial,
154 * but the memmove costs go through the roof for larger blocks.
156 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
159 * we can actually store much bigger names, but lets not confuse the rest
162 #define BTRFS_NAME_LEN 255
165 * Theoretical limit is larger, but we keep this down to a sane
166 * value. That should limit greatly the possibility of collisions on
169 #define BTRFS_LINK_MAX 65535U
171 /* 32 bytes in various csum fields */
172 #define BTRFS_CSUM_SIZE 32
175 #define BTRFS_CSUM_TYPE_CRC32 0
177 static int btrfs_csum_sizes
[] = { 4, 0 };
179 /* four bytes for CRC32 */
180 #define BTRFS_EMPTY_DIR_SIZE 0
182 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
183 #define REQ_GET_READ_MIRRORS (1 << 30)
185 #define BTRFS_FT_UNKNOWN 0
186 #define BTRFS_FT_REG_FILE 1
187 #define BTRFS_FT_DIR 2
188 #define BTRFS_FT_CHRDEV 3
189 #define BTRFS_FT_BLKDEV 4
190 #define BTRFS_FT_FIFO 5
191 #define BTRFS_FT_SOCK 6
192 #define BTRFS_FT_SYMLINK 7
193 #define BTRFS_FT_XATTR 8
194 #define BTRFS_FT_MAX 9
196 /* ioprio of readahead is set to idle */
197 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
199 #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
202 * The key defines the order in the tree, and so it also defines (optimal)
205 * objectid corresponds to the inode number.
207 * type tells us things about the object, and is a kind of stream selector.
208 * so for a given inode, keys with type of 1 might refer to the inode data,
209 * type of 2 may point to file data in the btree and type == 3 may point to
212 * offset is the starting byte offset for this key in the stream.
214 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
215 * in cpu native order. Otherwise they are identical and their sizes
216 * should be the same (ie both packed)
218 struct btrfs_disk_key
{
222 } __attribute__ ((__packed__
));
228 } __attribute__ ((__packed__
));
230 struct btrfs_mapping_tree
{
231 struct extent_map_tree map_tree
;
234 struct btrfs_dev_item
{
235 /* the internal btrfs device id */
238 /* size of the device */
244 /* optimal io alignment for this device */
247 /* optimal io width for this device */
250 /* minimal io size for this device */
253 /* type and info about this device */
256 /* expected generation for this device */
260 * starting byte of this partition on the device,
261 * to allow for stripe alignment in the future
265 /* grouping information for allocation decisions */
268 /* seek speed 0-100 where 100 is fastest */
271 /* bandwidth 0-100 where 100 is fastest */
274 /* btrfs generated uuid for this device */
275 u8 uuid
[BTRFS_UUID_SIZE
];
277 /* uuid of FS who owns this device */
278 u8 fsid
[BTRFS_UUID_SIZE
];
279 } __attribute__ ((__packed__
));
281 struct btrfs_stripe
{
284 u8 dev_uuid
[BTRFS_UUID_SIZE
];
285 } __attribute__ ((__packed__
));
288 /* size of this chunk in bytes */
291 /* objectid of the root referencing this chunk */
297 /* optimal io alignment for this chunk */
300 /* optimal io width for this chunk */
303 /* minimal io size for this chunk */
306 /* 2^16 stripes is quite a lot, a second limit is the size of a single
311 /* sub stripes only matter for raid10 */
313 struct btrfs_stripe stripe
;
314 /* additional stripes go here */
315 } __attribute__ ((__packed__
));
317 #define BTRFS_FREE_SPACE_EXTENT 1
318 #define BTRFS_FREE_SPACE_BITMAP 2
320 struct btrfs_free_space_entry
{
324 } __attribute__ ((__packed__
));
326 struct btrfs_free_space_header
{
327 struct btrfs_disk_key location
;
331 } __attribute__ ((__packed__
));
333 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
335 BUG_ON(num_stripes
== 0);
336 return sizeof(struct btrfs_chunk
) +
337 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
340 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
341 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
346 #define BTRFS_FS_STATE_ERROR 0
347 #define BTRFS_FS_STATE_REMOUNTING 1
348 #define BTRFS_FS_STATE_TRANS_ABORTED 2
349 #define BTRFS_FS_STATE_DEV_REPLACING 3
351 /* Super block flags */
352 /* Errors detected */
353 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
355 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
356 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
358 #define BTRFS_BACKREF_REV_MAX 256
359 #define BTRFS_BACKREF_REV_SHIFT 56
360 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
361 BTRFS_BACKREF_REV_SHIFT)
363 #define BTRFS_OLD_BACKREF_REV 0
364 #define BTRFS_MIXED_BACKREF_REV 1
367 * every tree block (leaf or node) starts with this header.
369 struct btrfs_header
{
370 /* these first four must match the super block */
371 u8 csum
[BTRFS_CSUM_SIZE
];
372 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
373 __le64 bytenr
; /* which block this node is supposed to live in */
376 /* allowed to be different from the super from here on down */
377 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
382 } __attribute__ ((__packed__
));
384 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
385 sizeof(struct btrfs_header)) / \
386 sizeof(struct btrfs_key_ptr))
387 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
388 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
389 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
390 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
391 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
392 sizeof(struct btrfs_item) - \
393 BTRFS_FILE_EXTENT_INLINE_DATA_START)
394 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
395 sizeof(struct btrfs_item) -\
396 sizeof(struct btrfs_dir_item))
400 * this is a very generous portion of the super block, giving us
401 * room to translate 14 chunks with 3 stripes each.
403 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
404 #define BTRFS_LABEL_SIZE 256
407 * just in case we somehow lose the roots and are not able to mount,
408 * we store an array of the roots from previous transactions
411 #define BTRFS_NUM_BACKUP_ROOTS 4
412 struct btrfs_root_backup
{
414 __le64 tree_root_gen
;
417 __le64 chunk_root_gen
;
420 __le64 extent_root_gen
;
429 __le64 csum_root_gen
;
439 u8 extent_root_level
;
443 /* future and to align */
445 } __attribute__ ((__packed__
));
448 * the super block basically lists the main trees of the FS
449 * it currently lacks any block count etc etc
451 struct btrfs_super_block
{
452 u8 csum
[BTRFS_CSUM_SIZE
];
453 /* the first 4 fields must match struct btrfs_header */
454 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
455 __le64 bytenr
; /* this block number */
458 /* allowed to be different from the btrfs_header from here own down */
465 /* this will help find the new super based on the log root */
466 __le64 log_root_transid
;
469 __le64 root_dir_objectid
;
473 __le32 __unused_leafsize
;
475 __le32 sys_chunk_array_size
;
476 __le64 chunk_root_generation
;
478 __le64 compat_ro_flags
;
479 __le64 incompat_flags
;
484 struct btrfs_dev_item dev_item
;
486 char label
[BTRFS_LABEL_SIZE
];
488 __le64 cache_generation
;
489 __le64 uuid_tree_generation
;
491 /* future expansion */
493 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
494 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
495 } __attribute__ ((__packed__
));
498 * Compat flags that we support. If any incompat flags are set other than the
499 * ones specified below then we will fail to mount
501 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
502 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
503 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
504 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
506 * some patches floated around with a second compression method
507 * lets save that incompat here for when they do get in
508 * Note we don't actually support it, we're just reserving the
511 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
514 * older kernels tried to do bigger metadata blocks, but the
515 * code was pretty buggy. Lets not let them try anymore.
517 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
519 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
520 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
521 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
522 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
524 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
525 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
526 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
527 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
528 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
529 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
531 #define BTRFS_FEATURE_INCOMPAT_SUPP \
532 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
533 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
534 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
535 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
536 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
537 BTRFS_FEATURE_INCOMPAT_RAID56 | \
538 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
539 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
540 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
542 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
543 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
544 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
547 * A leaf is full of items. offset and size tell us where to find
548 * the item in the leaf (relative to the start of the data area)
551 struct btrfs_disk_key key
;
554 } __attribute__ ((__packed__
));
557 * leaves have an item area and a data area:
558 * [item0, item1....itemN] [free space] [dataN...data1, data0]
560 * The data is separate from the items to get the keys closer together
564 struct btrfs_header header
;
565 struct btrfs_item items
[];
566 } __attribute__ ((__packed__
));
569 * all non-leaf blocks are nodes, they hold only keys and pointers to
572 struct btrfs_key_ptr
{
573 struct btrfs_disk_key key
;
576 } __attribute__ ((__packed__
));
579 struct btrfs_header header
;
580 struct btrfs_key_ptr ptrs
[];
581 } __attribute__ ((__packed__
));
584 * btrfs_paths remember the path taken from the root down to the leaf.
585 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
586 * to any other levels that are present.
588 * The slots array records the index of the item or block pointer
589 * used while walking the tree.
592 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
593 int slots
[BTRFS_MAX_LEVEL
];
594 /* if there is real range locking, this locks field will change */
595 int locks
[BTRFS_MAX_LEVEL
];
597 /* keep some upper locks as we walk down */
601 * set by btrfs_split_item, tells search_slot to keep all locks
602 * and to force calls to keep space in the nodes
604 unsigned int search_for_split
:1;
605 unsigned int keep_locks
:1;
606 unsigned int skip_locking
:1;
607 unsigned int leave_spinning
:1;
608 unsigned int search_commit_root
:1;
609 unsigned int need_commit_sem
:1;
610 unsigned int skip_release_on_error
:1;
614 * items in the extent btree are used to record the objectid of the
615 * owner of the block and the number of references
618 struct btrfs_extent_item
{
622 } __attribute__ ((__packed__
));
624 struct btrfs_extent_item_v0
{
626 } __attribute__ ((__packed__
));
628 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
629 sizeof(struct btrfs_item))
631 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
632 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
634 /* following flags only apply to tree blocks */
636 /* use full backrefs for extent pointers in the block */
637 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
640 * this flag is only used internally by scrub and may be changed at any time
641 * it is only declared here to avoid collisions
643 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
645 struct btrfs_tree_block_info
{
646 struct btrfs_disk_key key
;
648 } __attribute__ ((__packed__
));
650 struct btrfs_extent_data_ref
{
655 } __attribute__ ((__packed__
));
657 struct btrfs_shared_data_ref
{
659 } __attribute__ ((__packed__
));
661 struct btrfs_extent_inline_ref
{
664 } __attribute__ ((__packed__
));
666 /* old style backrefs item */
667 struct btrfs_extent_ref_v0
{
672 } __attribute__ ((__packed__
));
675 /* dev extents record free space on individual devices. The owner
676 * field points back to the chunk allocation mapping tree that allocated
677 * the extent. The chunk tree uuid field is a way to double check the owner
679 struct btrfs_dev_extent
{
681 __le64 chunk_objectid
;
684 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
685 } __attribute__ ((__packed__
));
687 struct btrfs_inode_ref
{
691 } __attribute__ ((__packed__
));
693 struct btrfs_inode_extref
{
694 __le64 parent_objectid
;
699 } __attribute__ ((__packed__
));
701 struct btrfs_timespec
{
704 } __attribute__ ((__packed__
));
706 enum btrfs_compression_type
{
707 BTRFS_COMPRESS_NONE
= 0,
708 BTRFS_COMPRESS_ZLIB
= 1,
709 BTRFS_COMPRESS_LZO
= 2,
710 BTRFS_COMPRESS_TYPES
= 2,
711 BTRFS_COMPRESS_LAST
= 3,
714 struct btrfs_inode_item
{
715 /* nfs style generation number */
717 /* transid that last touched this inode */
729 /* modification sequence number for NFS */
733 * a little future expansion, for more than this we can
734 * just grow the inode item and version it
737 struct btrfs_timespec atime
;
738 struct btrfs_timespec ctime
;
739 struct btrfs_timespec mtime
;
740 struct btrfs_timespec otime
;
741 } __attribute__ ((__packed__
));
743 struct btrfs_dir_log_item
{
745 } __attribute__ ((__packed__
));
747 struct btrfs_dir_item
{
748 struct btrfs_disk_key location
;
753 } __attribute__ ((__packed__
));
755 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
758 * Internal in-memory flag that a subvolume has been marked for deletion but
759 * still visible as a directory
761 #define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48)
763 struct btrfs_root_item
{
764 struct btrfs_inode_item inode
;
770 __le64 last_snapshot
;
773 struct btrfs_disk_key drop_progress
;
778 * The following fields appear after subvol_uuids+subvol_times
783 * This generation number is used to test if the new fields are valid
784 * and up to date while reading the root item. Everytime the root item
785 * is written out, the "generation" field is copied into this field. If
786 * anyone ever mounted the fs with an older kernel, we will have
787 * mismatching generation values here and thus must invalidate the
788 * new fields. See btrfs_update_root and btrfs_find_last_root for
790 * the offset of generation_v2 is also used as the start for the memset
791 * when invalidating the fields.
793 __le64 generation_v2
;
794 u8 uuid
[BTRFS_UUID_SIZE
];
795 u8 parent_uuid
[BTRFS_UUID_SIZE
];
796 u8 received_uuid
[BTRFS_UUID_SIZE
];
797 __le64 ctransid
; /* updated when an inode changes */
798 __le64 otransid
; /* trans when created */
799 __le64 stransid
; /* trans when sent. non-zero for received subvol */
800 __le64 rtransid
; /* trans when received. non-zero for received subvol */
801 struct btrfs_timespec ctime
;
802 struct btrfs_timespec otime
;
803 struct btrfs_timespec stime
;
804 struct btrfs_timespec rtime
;
805 __le64 reserved
[8]; /* for future */
806 } __attribute__ ((__packed__
));
809 * this is used for both forward and backward root refs
811 struct btrfs_root_ref
{
815 } __attribute__ ((__packed__
));
817 struct btrfs_disk_balance_args
{
819 * profiles to operate on, single is denoted by
820 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
830 /* devid subset filter [pstart..pend) */
834 /* btrfs virtual address space subset filter [vstart..vend) */
839 * profile to convert to, single is denoted by
840 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
844 /* BTRFS_BALANCE_ARGS_* */
847 /* BTRFS_BALANCE_ARGS_LIMIT value */
851 } __attribute__ ((__packed__
));
854 * store balance parameters to disk so that balance can be properly
855 * resumed after crash or unmount
857 struct btrfs_balance_item
{
858 /* BTRFS_BALANCE_* */
861 struct btrfs_disk_balance_args data
;
862 struct btrfs_disk_balance_args meta
;
863 struct btrfs_disk_balance_args sys
;
866 } __attribute__ ((__packed__
));
868 #define BTRFS_FILE_EXTENT_INLINE 0
869 #define BTRFS_FILE_EXTENT_REG 1
870 #define BTRFS_FILE_EXTENT_PREALLOC 2
872 struct btrfs_file_extent_item
{
874 * transaction id that created this extent
878 * max number of bytes to hold this extent in ram
879 * when we split a compressed extent we can't know how big
880 * each of the resulting pieces will be. So, this is
881 * an upper limit on the size of the extent in ram instead of
887 * 32 bits for the various ways we might encode the data,
888 * including compression and encryption. If any of these
889 * are set to something a given disk format doesn't understand
890 * it is treated like an incompat flag for reading and writing,
895 __le16 other_encoding
; /* spare for later use */
897 /* are we inline data or a real extent? */
901 * disk space consumed by the extent, checksum blocks are included
904 * At this offset in the structure, the inline extent data start.
907 __le64 disk_num_bytes
;
909 * the logical offset in file blocks (no csums)
910 * this extent record is for. This allows a file extent to point
911 * into the middle of an existing extent on disk, sharing it
912 * between two snapshots (useful if some bytes in the middle of the
913 * extent have changed
917 * the logical number of file blocks (no csums included). This
918 * always reflects the size uncompressed and without encoding.
922 } __attribute__ ((__packed__
));
924 struct btrfs_csum_item
{
926 } __attribute__ ((__packed__
));
928 struct btrfs_dev_stats_item
{
930 * grow this item struct at the end for future enhancements and keep
931 * the existing values unchanged
933 __le64 values
[BTRFS_DEV_STAT_VALUES_MAX
];
934 } __attribute__ ((__packed__
));
936 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
937 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
938 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
939 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
940 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
941 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
942 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
944 struct btrfs_dev_replace
{
945 u64 replace_state
; /* see #define above */
946 u64 time_started
; /* seconds since 1-Jan-1970 */
947 u64 time_stopped
; /* seconds since 1-Jan-1970 */
948 atomic64_t num_write_errors
;
949 atomic64_t num_uncorrectable_read_errors
;
952 u64 committed_cursor_left
;
953 u64 cursor_left_last_write_of_item
;
956 u64 cont_reading_from_srcdev_mode
; /* see #define above */
959 int item_needs_writeback
;
960 struct btrfs_device
*srcdev
;
961 struct btrfs_device
*tgtdev
;
964 atomic_t nesting_level
;
965 struct mutex lock_finishing_cancel_unmount
;
966 struct mutex lock_management_lock
;
969 struct btrfs_scrub_progress scrub_progress
;
972 struct btrfs_dev_replace_item
{
974 * grow this item struct at the end for future enhancements and keep
975 * the existing values unchanged
980 __le64 cont_reading_from_srcdev_mode
;
982 __le64 replace_state
;
985 __le64 num_write_errors
;
986 __le64 num_uncorrectable_read_errors
;
987 } __attribute__ ((__packed__
));
989 /* different types of block groups (and chunks) */
990 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
991 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
992 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
993 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
994 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
995 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
996 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
997 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
998 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
999 #define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
1000 BTRFS_SPACE_INFO_GLOBAL_RSV)
1002 enum btrfs_raid_types
{
1013 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1014 BTRFS_BLOCK_GROUP_SYSTEM | \
1015 BTRFS_BLOCK_GROUP_METADATA)
1017 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1018 BTRFS_BLOCK_GROUP_RAID1 | \
1019 BTRFS_BLOCK_GROUP_RAID5 | \
1020 BTRFS_BLOCK_GROUP_RAID6 | \
1021 BTRFS_BLOCK_GROUP_DUP | \
1022 BTRFS_BLOCK_GROUP_RAID10)
1023 #define BTRFS_BLOCK_GROUP_RAID56_MASK (BTRFS_BLOCK_GROUP_RAID5 | \
1024 BTRFS_BLOCK_GROUP_RAID6)
1027 * We need a bit for restriper to be able to tell when chunks of type
1028 * SINGLE are available. This "extended" profile format is used in
1029 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1030 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1031 * to avoid remappings between two formats in future.
1033 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1036 * A fake block group type that is used to communicate global block reserve
1037 * size to userspace via the SPACE_INFO ioctl.
1039 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
1041 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1042 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1044 static inline u64
chunk_to_extended(u64 flags
)
1046 if ((flags
& BTRFS_BLOCK_GROUP_PROFILE_MASK
) == 0)
1047 flags
|= BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1051 static inline u64
extended_to_chunk(u64 flags
)
1053 return flags
& ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1056 struct btrfs_block_group_item
{
1058 __le64 chunk_objectid
;
1060 } __attribute__ ((__packed__
));
1063 * is subvolume quota turned on?
1065 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1067 * RESCAN is set during the initialization phase
1069 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1071 * Some qgroup entries are known to be out of date,
1072 * either because the configuration has changed in a way that
1073 * makes a rescan necessary, or because the fs has been mounted
1074 * with a non-qgroup-aware version.
1075 * Turning qouta off and on again makes it inconsistent, too.
1077 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1079 #define BTRFS_QGROUP_STATUS_VERSION 1
1081 struct btrfs_qgroup_status_item
{
1084 * the generation is updated during every commit. As older
1085 * versions of btrfs are not aware of qgroups, it will be
1086 * possible to detect inconsistencies by checking the
1087 * generation on mount time
1091 /* flag definitions see above */
1095 * only used during scanning to record the progress
1096 * of the scan. It contains a logical address
1099 } __attribute__ ((__packed__
));
1101 struct btrfs_qgroup_info_item
{
1107 } __attribute__ ((__packed__
));
1109 /* flags definition for qgroup limits */
1110 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1111 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1112 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1113 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1114 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1115 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1117 struct btrfs_qgroup_limit_item
{
1119 * only updated when any of the other values change
1126 } __attribute__ ((__packed__
));
1128 /* For raid type sysfs entries */
1129 struct raid_kobject
{
1131 struct kobject kobj
;
1134 struct btrfs_space_info
{
1137 u64 total_bytes
; /* total bytes in the space,
1138 this doesn't take mirrors into account */
1139 u64 bytes_used
; /* total bytes used,
1140 this doesn't take mirrors into account */
1141 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
1142 transaction finishes */
1143 u64 bytes_reserved
; /* total bytes the allocator has reserved for
1144 current allocations */
1145 u64 bytes_may_use
; /* number of bytes that may be used for
1146 delalloc/allocations */
1147 u64 bytes_readonly
; /* total bytes that are read only */
1149 unsigned int full
:1; /* indicates that we cannot allocate any more
1150 chunks for this space */
1151 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
1153 unsigned int flush
:1; /* set if we are trying to make space */
1155 unsigned int force_alloc
; /* set if we need to force a chunk
1156 alloc for this space */
1158 u64 disk_used
; /* total bytes used on disk */
1159 u64 disk_total
; /* total bytes on disk, takes mirrors into
1165 * bytes_pinned is kept in line with what is actually pinned, as in
1166 * we've called update_block_group and dropped the bytes_used counter
1167 * and increased the bytes_pinned counter. However this means that
1168 * bytes_pinned does not reflect the bytes that will be pinned once the
1169 * delayed refs are flushed, so this counter is inc'ed everytime we call
1170 * btrfs_free_extent so it is a realtime count of what will be freed
1171 * once the transaction is committed. It will be zero'ed everytime the
1172 * transaction commits.
1174 struct percpu_counter total_bytes_pinned
;
1176 struct list_head list
;
1177 struct list_head ro_bgs
;
1179 struct rw_semaphore groups_sem
;
1180 /* for block groups in our same type */
1181 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
1182 wait_queue_head_t wait
;
1184 struct kobject kobj
;
1185 struct kobject
*block_group_kobjs
[BTRFS_NR_RAID_TYPES
];
1188 #define BTRFS_BLOCK_RSV_GLOBAL 1
1189 #define BTRFS_BLOCK_RSV_DELALLOC 2
1190 #define BTRFS_BLOCK_RSV_TRANS 3
1191 #define BTRFS_BLOCK_RSV_CHUNK 4
1192 #define BTRFS_BLOCK_RSV_DELOPS 5
1193 #define BTRFS_BLOCK_RSV_EMPTY 6
1194 #define BTRFS_BLOCK_RSV_TEMP 7
1196 struct btrfs_block_rsv
{
1199 struct btrfs_space_info
*space_info
;
1201 unsigned short full
;
1202 unsigned short type
;
1203 unsigned short failfast
;
1207 * free clusters are used to claim free space in relatively large chunks,
1208 * allowing us to do less seeky writes. They are used for all metadata
1209 * allocations and data allocations in ssd mode.
1211 struct btrfs_free_cluster
{
1213 spinlock_t refill_lock
;
1214 struct rb_root root
;
1216 /* largest extent in this cluster */
1219 /* first extent starting offset */
1222 struct btrfs_block_group_cache
*block_group
;
1224 * when a cluster is allocated from a block group, we put the
1225 * cluster onto a list in the block group so that it can
1226 * be freed before the block group is freed.
1228 struct list_head block_group_list
;
1231 enum btrfs_caching_type
{
1233 BTRFS_CACHE_STARTED
= 1,
1234 BTRFS_CACHE_FAST
= 2,
1235 BTRFS_CACHE_FINISHED
= 3,
1236 BTRFS_CACHE_ERROR
= 4,
1239 enum btrfs_disk_cache_state
{
1240 BTRFS_DC_WRITTEN
= 0,
1246 struct btrfs_caching_control
{
1247 struct list_head list
;
1249 wait_queue_head_t wait
;
1250 struct btrfs_work work
;
1251 struct btrfs_block_group_cache
*block_group
;
1256 struct btrfs_block_group_cache
{
1257 struct btrfs_key key
;
1258 struct btrfs_block_group_item item
;
1259 struct btrfs_fs_info
*fs_info
;
1260 struct inode
*inode
;
1268 u64 cache_generation
;
1271 * It is just used for the delayed data space allocation because
1272 * only the data space allocation and the relative metadata update
1273 * can be done cross the transaction.
1275 struct rw_semaphore data_rwsem
;
1277 /* for raid56, this is a full stripe, without parity */
1278 unsigned long full_stripe_len
;
1281 unsigned int iref
:1;
1282 unsigned int has_caching_ctl
:1;
1283 unsigned int removed
:1;
1285 int disk_cache_state
;
1287 /* cache tracking stuff */
1289 struct btrfs_caching_control
*caching_ctl
;
1290 u64 last_byte_to_unpin
;
1292 struct btrfs_space_info
*space_info
;
1294 /* free space cache stuff */
1295 struct btrfs_free_space_ctl
*free_space_ctl
;
1297 /* block group cache stuff */
1298 struct rb_node cache_node
;
1300 /* for block groups in the same raid type */
1301 struct list_head list
;
1306 /* List of struct btrfs_free_clusters for this block group.
1307 * Today it will only have one thing on it, but that may change
1309 struct list_head cluster_list
;
1311 /* For delayed block group creation or deletion of empty block groups */
1312 struct list_head bg_list
;
1314 /* For read-only block groups */
1315 struct list_head ro_list
;
1319 /* For dirty block groups */
1320 struct list_head dirty_list
;
1323 /* delayed seq elem */
1325 struct list_head list
;
1329 enum btrfs_orphan_cleanup_state
{
1330 ORPHAN_CLEANUP_STARTED
= 1,
1331 ORPHAN_CLEANUP_DONE
= 2,
1334 /* used by the raid56 code to lock stripes for read/modify/write */
1335 struct btrfs_stripe_hash
{
1336 struct list_head hash_list
;
1337 wait_queue_head_t wait
;
1341 /* used by the raid56 code to lock stripes for read/modify/write */
1342 struct btrfs_stripe_hash_table
{
1343 struct list_head stripe_cache
;
1344 spinlock_t cache_lock
;
1346 struct btrfs_stripe_hash table
[];
1349 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1351 void btrfs_init_async_reclaim_work(struct work_struct
*work
);
1354 struct reloc_control
;
1355 struct btrfs_device
;
1356 struct btrfs_fs_devices
;
1357 struct btrfs_balance_control
;
1358 struct btrfs_delayed_root
;
1359 struct btrfs_fs_info
{
1360 u8 fsid
[BTRFS_FSID_SIZE
];
1361 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1362 struct btrfs_root
*extent_root
;
1363 struct btrfs_root
*tree_root
;
1364 struct btrfs_root
*chunk_root
;
1365 struct btrfs_root
*dev_root
;
1366 struct btrfs_root
*fs_root
;
1367 struct btrfs_root
*csum_root
;
1368 struct btrfs_root
*quota_root
;
1369 struct btrfs_root
*uuid_root
;
1371 /* the log root tree is a directory of all the other log roots */
1372 struct btrfs_root
*log_root_tree
;
1374 spinlock_t fs_roots_radix_lock
;
1375 struct radix_tree_root fs_roots_radix
;
1377 /* block group cache stuff */
1378 spinlock_t block_group_cache_lock
;
1379 u64 first_logical_byte
;
1380 struct rb_root block_group_cache_tree
;
1382 /* keep track of unallocated space */
1383 spinlock_t free_chunk_lock
;
1384 u64 free_chunk_space
;
1386 struct extent_io_tree freed_extents
[2];
1387 struct extent_io_tree
*pinned_extents
;
1389 /* logical->physical extent mapping */
1390 struct btrfs_mapping_tree mapping_tree
;
1393 * block reservation for extent, checksum, root tree and
1394 * delayed dir index item
1396 struct btrfs_block_rsv global_block_rsv
;
1397 /* block reservation for delay allocation */
1398 struct btrfs_block_rsv delalloc_block_rsv
;
1399 /* block reservation for metadata operations */
1400 struct btrfs_block_rsv trans_block_rsv
;
1401 /* block reservation for chunk tree */
1402 struct btrfs_block_rsv chunk_block_rsv
;
1403 /* block reservation for delayed operations */
1404 struct btrfs_block_rsv delayed_block_rsv
;
1406 struct btrfs_block_rsv empty_block_rsv
;
1409 u64 last_trans_committed
;
1410 u64 avg_delayed_ref_runtime
;
1413 * this is updated to the current trans every time a full commit
1414 * is required instead of the faster short fsync log commits
1416 u64 last_trans_log_full_commit
;
1417 unsigned long mount_opt
;
1419 * Track requests for actions that need to be done during transaction
1420 * commit (like for some mount options).
1422 unsigned long pending_changes
;
1423 unsigned long compress_type
:4;
1424 int commit_interval
;
1426 * It is a suggestive number, the read side is safe even it gets a
1427 * wrong number because we will write out the data into a regular
1428 * extent. The write side(mount/remount) is under ->s_umount lock,
1429 * so it is also safe.
1433 * Protected by ->chunk_mutex and sb->s_umount.
1435 * The reason that we use two lock to protect it is because only
1436 * remount and mount operations can change it and these two operations
1437 * are under sb->s_umount, but the read side (chunk allocation) can not
1438 * acquire sb->s_umount or the deadlock would happen. So we use two
1439 * locks to protect it. On the write side, we must acquire two locks,
1440 * and on the read side, we just need acquire one of them.
1443 struct btrfs_transaction
*running_transaction
;
1444 wait_queue_head_t transaction_throttle
;
1445 wait_queue_head_t transaction_wait
;
1446 wait_queue_head_t transaction_blocked_wait
;
1447 wait_queue_head_t async_submit_wait
;
1450 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1451 * when they are updated.
1453 * Because we do not clear the flags for ever, so we needn't use
1454 * the lock on the read side.
1456 * We also needn't use the lock when we mount the fs, because
1457 * there is no other task which will update the flag.
1459 spinlock_t super_lock
;
1460 struct btrfs_super_block
*super_copy
;
1461 struct btrfs_super_block
*super_for_commit
;
1462 struct block_device
*__bdev
;
1463 struct super_block
*sb
;
1464 struct inode
*btree_inode
;
1465 struct backing_dev_info bdi
;
1466 struct mutex tree_log_mutex
;
1467 struct mutex transaction_kthread_mutex
;
1468 struct mutex cleaner_mutex
;
1469 struct mutex chunk_mutex
;
1470 struct mutex volume_mutex
;
1472 /* this is used during read/modify/write to make sure
1473 * no two ios are trying to mod the same stripe at the same
1476 struct btrfs_stripe_hash_table
*stripe_hash_table
;
1479 * this protects the ordered operations list only while we are
1480 * processing all of the entries on it. This way we make
1481 * sure the commit code doesn't find the list temporarily empty
1482 * because another function happens to be doing non-waiting preflush
1483 * before jumping into the main commit.
1485 struct mutex ordered_operations_mutex
;
1488 * Same as ordered_operations_mutex except this is for ordered extents
1489 * and not the operations.
1491 struct mutex ordered_extent_flush_mutex
;
1493 struct rw_semaphore commit_root_sem
;
1495 struct rw_semaphore cleanup_work_sem
;
1497 struct rw_semaphore subvol_sem
;
1498 struct srcu_struct subvol_srcu
;
1500 spinlock_t trans_lock
;
1502 * the reloc mutex goes with the trans lock, it is taken
1503 * during commit to protect us from the relocation code
1505 struct mutex reloc_mutex
;
1507 struct list_head trans_list
;
1508 struct list_head dead_roots
;
1509 struct list_head caching_block_groups
;
1511 spinlock_t delayed_iput_lock
;
1512 struct list_head delayed_iputs
;
1514 /* this protects tree_mod_seq_list */
1515 spinlock_t tree_mod_seq_lock
;
1516 atomic64_t tree_mod_seq
;
1517 struct list_head tree_mod_seq_list
;
1519 /* this protects tree_mod_log */
1520 rwlock_t tree_mod_log_lock
;
1521 struct rb_root tree_mod_log
;
1523 atomic_t nr_async_submits
;
1524 atomic_t async_submit_draining
;
1525 atomic_t nr_async_bios
;
1526 atomic_t async_delalloc_pages
;
1527 atomic_t open_ioctl_trans
;
1530 * this is used to protect the following list -- ordered_roots.
1532 spinlock_t ordered_root_lock
;
1535 * all fs/file tree roots in which there are data=ordered extents
1536 * pending writeback are added into this list.
1538 * these can span multiple transactions and basically include
1539 * every dirty data page that isn't from nodatacow
1541 struct list_head ordered_roots
;
1543 struct mutex delalloc_root_mutex
;
1544 spinlock_t delalloc_root_lock
;
1545 /* all fs/file tree roots that have delalloc inodes. */
1546 struct list_head delalloc_roots
;
1549 * there is a pool of worker threads for checksumming during writes
1550 * and a pool for checksumming after reads. This is because readers
1551 * can run with FS locks held, and the writers may be waiting for
1552 * those locks. We don't want ordering in the pending list to cause
1553 * deadlocks, and so the two are serviced separately.
1555 * A third pool does submit_bio to avoid deadlocking with the other
1558 struct btrfs_workqueue
*workers
;
1559 struct btrfs_workqueue
*delalloc_workers
;
1560 struct btrfs_workqueue
*flush_workers
;
1561 struct btrfs_workqueue
*endio_workers
;
1562 struct btrfs_workqueue
*endio_meta_workers
;
1563 struct btrfs_workqueue
*endio_raid56_workers
;
1564 struct btrfs_workqueue
*endio_repair_workers
;
1565 struct btrfs_workqueue
*rmw_workers
;
1566 struct btrfs_workqueue
*endio_meta_write_workers
;
1567 struct btrfs_workqueue
*endio_write_workers
;
1568 struct btrfs_workqueue
*endio_freespace_worker
;
1569 struct btrfs_workqueue
*submit_workers
;
1570 struct btrfs_workqueue
*caching_workers
;
1571 struct btrfs_workqueue
*readahead_workers
;
1574 * fixup workers take dirty pages that didn't properly go through
1575 * the cow mechanism and make them safe to write. It happens
1576 * for the sys_munmap function call path
1578 struct btrfs_workqueue
*fixup_workers
;
1579 struct btrfs_workqueue
*delayed_workers
;
1581 /* the extent workers do delayed refs on the extent allocation tree */
1582 struct btrfs_workqueue
*extent_workers
;
1583 struct task_struct
*transaction_kthread
;
1584 struct task_struct
*cleaner_kthread
;
1585 int thread_pool_size
;
1587 struct kobject super_kobj
;
1588 struct kobject
*space_info_kobj
;
1589 struct kobject
*device_dir_kobj
;
1590 struct completion kobj_unregister
;
1593 int log_root_recovering
;
1598 /* used to keep from writing metadata until there is a nice batch */
1599 struct percpu_counter dirty_metadata_bytes
;
1600 struct percpu_counter delalloc_bytes
;
1601 s32 dirty_metadata_batch
;
1604 struct list_head dirty_cowonly_roots
;
1606 struct btrfs_fs_devices
*fs_devices
;
1609 * the space_info list is almost entirely read only. It only changes
1610 * when we add a new raid type to the FS, and that happens
1611 * very rarely. RCU is used to protect it.
1613 struct list_head space_info
;
1615 struct btrfs_space_info
*data_sinfo
;
1617 struct reloc_control
*reloc_ctl
;
1619 /* data_alloc_cluster is only used in ssd mode */
1620 struct btrfs_free_cluster data_alloc_cluster
;
1622 /* all metadata allocations go through this cluster */
1623 struct btrfs_free_cluster meta_alloc_cluster
;
1625 /* auto defrag inodes go here */
1626 spinlock_t defrag_inodes_lock
;
1627 struct rb_root defrag_inodes
;
1628 atomic_t defrag_running
;
1630 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1631 seqlock_t profiles_lock
;
1633 * these three are in extended format (availability of single
1634 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1635 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1637 u64 avail_data_alloc_bits
;
1638 u64 avail_metadata_alloc_bits
;
1639 u64 avail_system_alloc_bits
;
1641 /* restriper state */
1642 spinlock_t balance_lock
;
1643 struct mutex balance_mutex
;
1644 atomic_t balance_running
;
1645 atomic_t balance_pause_req
;
1646 atomic_t balance_cancel_req
;
1647 struct btrfs_balance_control
*balance_ctl
;
1648 wait_queue_head_t balance_wait_q
;
1650 unsigned data_chunk_allocations
;
1651 unsigned metadata_ratio
;
1655 /* private scrub information */
1656 struct mutex scrub_lock
;
1657 atomic_t scrubs_running
;
1658 atomic_t scrub_pause_req
;
1659 atomic_t scrubs_paused
;
1660 atomic_t scrub_cancel_req
;
1661 wait_queue_head_t scrub_pause_wait
;
1662 int scrub_workers_refcnt
;
1663 struct btrfs_workqueue
*scrub_workers
;
1664 struct btrfs_workqueue
*scrub_wr_completion_workers
;
1665 struct btrfs_workqueue
*scrub_nocow_workers
;
1667 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1668 u32 check_integrity_print_mask
;
1673 unsigned int quota_enabled
:1;
1676 * quota_enabled only changes state after a commit. This holds the
1679 unsigned int pending_quota_state
:1;
1681 /* is qgroup tracking in a consistent state? */
1684 /* holds configuration and tracking. Protected by qgroup_lock */
1685 struct rb_root qgroup_tree
;
1686 struct rb_root qgroup_op_tree
;
1687 spinlock_t qgroup_lock
;
1688 spinlock_t qgroup_op_lock
;
1689 atomic_t qgroup_op_seq
;
1692 * used to avoid frequently calling ulist_alloc()/ulist_free()
1693 * when doing qgroup accounting, it must be protected by qgroup_lock.
1695 struct ulist
*qgroup_ulist
;
1697 /* protect user change for quota operations */
1698 struct mutex qgroup_ioctl_lock
;
1700 /* list of dirty qgroups to be written at next commit */
1701 struct list_head dirty_qgroups
;
1703 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1706 /* qgroup rescan items */
1707 struct mutex qgroup_rescan_lock
; /* protects the progress item */
1708 struct btrfs_key qgroup_rescan_progress
;
1709 struct btrfs_workqueue
*qgroup_rescan_workers
;
1710 struct completion qgroup_rescan_completion
;
1711 struct btrfs_work qgroup_rescan_work
;
1713 /* filesystem state */
1714 unsigned long fs_state
;
1716 struct btrfs_delayed_root
*delayed_root
;
1718 /* readahead tree */
1719 spinlock_t reada_lock
;
1720 struct radix_tree_root reada_tree
;
1722 /* Extent buffer radix tree */
1723 spinlock_t buffer_lock
;
1724 struct radix_tree_root buffer_radix
;
1726 /* next backup root to be overwritten */
1727 int backup_root_index
;
1729 int num_tolerated_disk_barrier_failures
;
1731 /* device replace state */
1732 struct btrfs_dev_replace dev_replace
;
1734 atomic_t mutually_exclusive_operation_running
;
1736 struct percpu_counter bio_counter
;
1737 wait_queue_head_t replace_wait
;
1739 struct semaphore uuid_tree_rescan_sem
;
1740 unsigned int update_uuid_tree_gen
:1;
1742 /* Used to reclaim the metadata space in the background. */
1743 struct work_struct async_reclaim_work
;
1745 spinlock_t unused_bgs_lock
;
1746 struct list_head unused_bgs
;
1748 /* For btrfs to record security options */
1749 struct security_mnt_opts security_opts
;
1752 * Chunks that can't be freed yet (under a trim/discard operation)
1753 * and will be latter freed. Protected by fs_info->chunk_mutex.
1755 struct list_head pinned_chunks
;
1758 struct btrfs_subvolume_writers
{
1759 struct percpu_counter counter
;
1760 wait_queue_head_t wait
;
1764 * The state of btrfs root
1767 * btrfs_record_root_in_trans is a multi-step process,
1768 * and it can race with the balancing code. But the
1769 * race is very small, and only the first time the root
1770 * is added to each transaction. So IN_TRANS_SETUP
1771 * is used to tell us when more checks are required
1773 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1774 #define BTRFS_ROOT_REF_COWS 1
1775 #define BTRFS_ROOT_TRACK_DIRTY 2
1776 #define BTRFS_ROOT_IN_RADIX 3
1777 #define BTRFS_ROOT_DUMMY_ROOT 4
1778 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1779 #define BTRFS_ROOT_DEFRAG_RUNNING 6
1780 #define BTRFS_ROOT_FORCE_COW 7
1781 #define BTRFS_ROOT_MULTI_LOG_TASKS 8
1782 #define BTRFS_ROOT_DIRTY 9
1785 * in ram representation of the tree. extent_root is used for all allocations
1786 * and for the extent tree extent_root root.
1789 struct extent_buffer
*node
;
1791 struct extent_buffer
*commit_root
;
1792 struct btrfs_root
*log_root
;
1793 struct btrfs_root
*reloc_root
;
1795 unsigned long state
;
1796 struct btrfs_root_item root_item
;
1797 struct btrfs_key root_key
;
1798 struct btrfs_fs_info
*fs_info
;
1799 struct extent_io_tree dirty_log_pages
;
1801 struct mutex objectid_mutex
;
1803 spinlock_t accounting_lock
;
1804 struct btrfs_block_rsv
*block_rsv
;
1806 /* free ino cache stuff */
1807 struct btrfs_free_space_ctl
*free_ino_ctl
;
1808 enum btrfs_caching_type ino_cache_state
;
1809 spinlock_t ino_cache_lock
;
1810 wait_queue_head_t ino_cache_wait
;
1811 struct btrfs_free_space_ctl
*free_ino_pinned
;
1812 u64 ino_cache_progress
;
1813 struct inode
*ino_cache_inode
;
1815 struct mutex log_mutex
;
1816 wait_queue_head_t log_writer_wait
;
1817 wait_queue_head_t log_commit_wait
[2];
1818 struct list_head log_ctxs
[2];
1819 atomic_t log_writers
;
1820 atomic_t log_commit
[2];
1823 /* No matter the commit succeeds or not*/
1824 int log_transid_committed
;
1825 /* Just be updated when the commit succeeds. */
1826 int last_log_commit
;
1827 pid_t log_start_pid
;
1832 /* data allocations are done in sectorsize units */
1835 /* node allocations are done in nodesize units */
1842 u64 highest_objectid
;
1844 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1847 u64 defrag_trans_start
;
1848 struct btrfs_key defrag_progress
;
1849 struct btrfs_key defrag_max
;
1852 /* the dirty list is only used by non-reference counted roots */
1853 struct list_head dirty_list
;
1855 struct list_head root_list
;
1857 spinlock_t log_extents_lock
[2];
1858 struct list_head logged_list
[2];
1860 spinlock_t orphan_lock
;
1861 atomic_t orphan_inodes
;
1862 struct btrfs_block_rsv
*orphan_block_rsv
;
1863 int orphan_cleanup_state
;
1865 spinlock_t inode_lock
;
1866 /* red-black tree that keeps track of in-memory inodes */
1867 struct rb_root inode_tree
;
1870 * radix tree that keeps track of delayed nodes of every inode,
1871 * protected by inode_lock
1873 struct radix_tree_root delayed_nodes_tree
;
1875 * right now this just gets used so that a root has its own devid
1876 * for stat. It may be used for more later
1880 spinlock_t root_item_lock
;
1883 struct mutex delalloc_mutex
;
1884 spinlock_t delalloc_lock
;
1886 * all of the inodes that have delalloc bytes. It is possible for
1887 * this list to be empty even when there is still dirty data=ordered
1888 * extents waiting to finish IO.
1890 struct list_head delalloc_inodes
;
1891 struct list_head delalloc_root
;
1892 u64 nr_delalloc_inodes
;
1894 struct mutex ordered_extent_mutex
;
1896 * this is used by the balancing code to wait for all the pending
1899 spinlock_t ordered_extent_lock
;
1902 * all of the data=ordered extents pending writeback
1903 * these can span multiple transactions and basically include
1904 * every dirty data page that isn't from nodatacow
1906 struct list_head ordered_extents
;
1907 struct list_head ordered_root
;
1908 u64 nr_ordered_extents
;
1911 * Number of currently running SEND ioctls to prevent
1912 * manipulation with the read-only status via SUBVOL_SETFLAGS
1914 int send_in_progress
;
1915 struct btrfs_subvolume_writers
*subv_writers
;
1916 atomic_t will_be_snapshoted
;
1919 struct btrfs_ioctl_defrag_range_args
{
1920 /* start of the defrag operation */
1923 /* number of bytes to defrag, use (u64)-1 to say all */
1927 * flags for the operation, which can include turning
1928 * on compression for this one defrag
1933 * any extent bigger than this will be considered
1934 * already defragged. Use 0 to take the kernel default
1935 * Use 1 to say every single extent must be rewritten
1937 __u32 extent_thresh
;
1940 * which compression method to use if turning on compression
1941 * for this defrag operation. If unspecified, zlib will
1944 __u32 compress_type
;
1946 /* spare for later */
1952 * inode items have the data typically returned from stat and store other
1953 * info about object characteristics. There is one for every file and dir in
1956 #define BTRFS_INODE_ITEM_KEY 1
1957 #define BTRFS_INODE_REF_KEY 12
1958 #define BTRFS_INODE_EXTREF_KEY 13
1959 #define BTRFS_XATTR_ITEM_KEY 24
1960 #define BTRFS_ORPHAN_ITEM_KEY 48
1961 /* reserve 2-15 close to the inode for later flexibility */
1964 * dir items are the name -> inode pointers in a directory. There is one
1965 * for every name in a directory.
1967 #define BTRFS_DIR_LOG_ITEM_KEY 60
1968 #define BTRFS_DIR_LOG_INDEX_KEY 72
1969 #define BTRFS_DIR_ITEM_KEY 84
1970 #define BTRFS_DIR_INDEX_KEY 96
1972 * extent data is for file data
1974 #define BTRFS_EXTENT_DATA_KEY 108
1977 * extent csums are stored in a separate tree and hold csums for
1978 * an entire extent on disk.
1980 #define BTRFS_EXTENT_CSUM_KEY 128
1983 * root items point to tree roots. They are typically in the root
1984 * tree used by the super block to find all the other trees
1986 #define BTRFS_ROOT_ITEM_KEY 132
1989 * root backrefs tie subvols and snapshots to the directory entries that
1992 #define BTRFS_ROOT_BACKREF_KEY 144
1995 * root refs make a fast index for listing all of the snapshots and
1996 * subvolumes referenced by a given root. They point directly to the
1997 * directory item in the root that references the subvol
1999 #define BTRFS_ROOT_REF_KEY 156
2002 * extent items are in the extent map tree. These record which blocks
2003 * are used, and how many references there are to each block
2005 #define BTRFS_EXTENT_ITEM_KEY 168
2008 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
2009 * the length, so we save the level in key->offset instead of the length.
2011 #define BTRFS_METADATA_ITEM_KEY 169
2013 #define BTRFS_TREE_BLOCK_REF_KEY 176
2015 #define BTRFS_EXTENT_DATA_REF_KEY 178
2017 #define BTRFS_EXTENT_REF_V0_KEY 180
2019 #define BTRFS_SHARED_BLOCK_REF_KEY 182
2021 #define BTRFS_SHARED_DATA_REF_KEY 184
2024 * block groups give us hints into the extent allocation trees. Which
2025 * blocks are free etc etc
2027 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
2029 #define BTRFS_DEV_EXTENT_KEY 204
2030 #define BTRFS_DEV_ITEM_KEY 216
2031 #define BTRFS_CHUNK_ITEM_KEY 228
2034 * Records the overall state of the qgroups.
2035 * There's only one instance of this key present,
2036 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
2038 #define BTRFS_QGROUP_STATUS_KEY 240
2040 * Records the currently used space of the qgroup.
2041 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
2043 #define BTRFS_QGROUP_INFO_KEY 242
2045 * Contains the user configured limits for the qgroup.
2046 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
2048 #define BTRFS_QGROUP_LIMIT_KEY 244
2050 * Records the child-parent relationship of qgroups. For
2051 * each relation, 2 keys are present:
2052 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
2053 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
2055 #define BTRFS_QGROUP_RELATION_KEY 246
2057 #define BTRFS_BALANCE_ITEM_KEY 248
2060 * Persistantly stores the io stats in the device tree.
2061 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
2063 #define BTRFS_DEV_STATS_KEY 249
2066 * Persistantly stores the device replace state in the device tree.
2067 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
2069 #define BTRFS_DEV_REPLACE_KEY 250
2072 * Stores items that allow to quickly map UUIDs to something else.
2073 * These items are part of the filesystem UUID tree.
2074 * The key is built like this:
2075 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
2077 #if BTRFS_UUID_SIZE != 16
2078 #error "UUID items require BTRFS_UUID_SIZE == 16!"
2080 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
2081 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
2082 * received subvols */
2085 * string items are for debugging. They just store a short string of
2088 #define BTRFS_STRING_ITEM_KEY 253
2091 * Flags for mount options.
2093 * Note: don't forget to add new options to btrfs_show_options()
2095 #define BTRFS_MOUNT_NODATASUM (1 << 0)
2096 #define BTRFS_MOUNT_NODATACOW (1 << 1)
2097 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
2098 #define BTRFS_MOUNT_SSD (1 << 3)
2099 #define BTRFS_MOUNT_DEGRADED (1 << 4)
2100 #define BTRFS_MOUNT_COMPRESS (1 << 5)
2101 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
2102 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
2103 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
2104 #define BTRFS_MOUNT_NOSSD (1 << 9)
2105 #define BTRFS_MOUNT_DISCARD (1 << 10)
2106 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
2107 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2108 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2109 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2110 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2111 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2112 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2113 #define BTRFS_MOUNT_RECOVERY (1 << 18)
2114 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2115 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2116 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2117 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2118 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2120 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2121 #define BTRFS_DEFAULT_MAX_INLINE (8192)
2123 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2124 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2125 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2126 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2129 #define btrfs_set_and_info(root, opt, fmt, args...) \
2131 if (!btrfs_test_opt(root, opt)) \
2132 btrfs_info(root->fs_info, fmt, ##args); \
2133 btrfs_set_opt(root->fs_info->mount_opt, opt); \
2136 #define btrfs_clear_and_info(root, opt, fmt, args...) \
2138 if (btrfs_test_opt(root, opt)) \
2139 btrfs_info(root->fs_info, fmt, ##args); \
2140 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
2144 * Requests for changes that need to be done during transaction commit.
2146 * Internal mount options that are used for special handling of the real
2147 * mount options (eg. cannot be set during remount and have to be set during
2148 * transaction commit)
2151 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
2152 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
2153 #define BTRFS_PENDING_COMMIT (2)
2155 #define btrfs_test_pending(info, opt) \
2156 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2157 #define btrfs_set_pending(info, opt) \
2158 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2159 #define btrfs_clear_pending(info, opt) \
2160 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
2163 * Helpers for setting pending mount option changes.
2165 * Expects corresponding macros
2166 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
2168 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
2170 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2171 btrfs_info((info), fmt, ##args); \
2172 btrfs_set_pending((info), SET_##opt); \
2173 btrfs_clear_pending((info), CLEAR_##opt); \
2177 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
2179 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
2180 btrfs_info((info), fmt, ##args); \
2181 btrfs_set_pending((info), CLEAR_##opt); \
2182 btrfs_clear_pending((info), SET_##opt); \
2189 #define BTRFS_INODE_NODATASUM (1 << 0)
2190 #define BTRFS_INODE_NODATACOW (1 << 1)
2191 #define BTRFS_INODE_READONLY (1 << 2)
2192 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2193 #define BTRFS_INODE_PREALLOC (1 << 4)
2194 #define BTRFS_INODE_SYNC (1 << 5)
2195 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2196 #define BTRFS_INODE_APPEND (1 << 7)
2197 #define BTRFS_INODE_NODUMP (1 << 8)
2198 #define BTRFS_INODE_NOATIME (1 << 9)
2199 #define BTRFS_INODE_DIRSYNC (1 << 10)
2200 #define BTRFS_INODE_COMPRESS (1 << 11)
2202 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2204 struct btrfs_map_token
{
2205 struct extent_buffer
*eb
;
2207 unsigned long offset
;
2210 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
2212 token
->kaddr
= NULL
;
2215 /* some macros to generate set/get funcs for the struct fields. This
2216 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2219 #define le8_to_cpu(v) (v)
2220 #define cpu_to_le8(v) (v)
2223 #define read_eb_member(eb, ptr, type, member, result) ( \
2224 read_extent_buffer(eb, (char *)(result), \
2225 ((unsigned long)(ptr)) + \
2226 offsetof(type, member), \
2227 sizeof(((type *)0)->member)))
2229 #define write_eb_member(eb, ptr, type, member, result) ( \
2230 write_extent_buffer(eb, (char *)(result), \
2231 ((unsigned long)(ptr)) + \
2232 offsetof(type, member), \
2233 sizeof(((type *)0)->member)))
2235 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2236 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2237 unsigned long off, \
2238 struct btrfs_map_token *token); \
2239 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2240 unsigned long off, u##bits val, \
2241 struct btrfs_map_token *token); \
2242 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2243 unsigned long off) \
2245 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2247 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2248 unsigned long off, u##bits val) \
2250 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2253 DECLARE_BTRFS_SETGET_BITS(8)
2254 DECLARE_BTRFS_SETGET_BITS(16)
2255 DECLARE_BTRFS_SETGET_BITS(32)
2256 DECLARE_BTRFS_SETGET_BITS(64)
2258 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2259 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2261 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2262 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2264 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2267 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2268 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2270 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2271 struct btrfs_map_token *token) \
2273 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2274 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2276 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2277 type *s, u##bits val, \
2278 struct btrfs_map_token *token) \
2280 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2281 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2284 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2285 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2287 type *p = page_address(eb->pages[0]); \
2288 u##bits res = le##bits##_to_cpu(p->member); \
2291 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2294 type *p = page_address(eb->pages[0]); \
2295 p->member = cpu_to_le##bits(val); \
2298 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2299 static inline u##bits btrfs_##name(type *s) \
2301 return le##bits##_to_cpu(s->member); \
2303 static inline void btrfs_set_##name(type *s, u##bits val) \
2305 s->member = cpu_to_le##bits(val); \
2308 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
2309 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
2310 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
2311 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
2312 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
2313 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
2315 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
2316 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
2317 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
2318 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
2319 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
2320 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
2322 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
2323 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
2325 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
2327 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
2329 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
2331 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
2333 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
2334 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
2336 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
2338 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
2340 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
2343 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
2345 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
2348 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
2350 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
2353 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
2354 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
2355 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
2356 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
2357 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
2358 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
2359 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
2360 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
2361 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
2362 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
2363 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
2365 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
2367 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
2370 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
2371 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
2372 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
2374 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
2376 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
2378 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
2380 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
2381 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
2383 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
2385 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
2386 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
2388 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
2391 unsigned long offset
= (unsigned long)c
;
2392 offset
+= offsetof(struct btrfs_chunk
, stripe
);
2393 offset
+= nr
* sizeof(struct btrfs_stripe
);
2394 return (struct btrfs_stripe
*)offset
;
2397 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
2399 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
2402 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
2403 struct btrfs_chunk
*c
, int nr
)
2405 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
2408 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
2409 struct btrfs_chunk
*c
, int nr
)
2411 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
2414 /* struct btrfs_block_group_item */
2415 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
2417 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
2419 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
2420 struct btrfs_block_group_item
, chunk_objectid
, 64);
2422 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
2423 struct btrfs_block_group_item
, chunk_objectid
, 64);
2424 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
2425 struct btrfs_block_group_item
, flags
, 64);
2426 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
2427 struct btrfs_block_group_item
, flags
, 64);
2429 /* struct btrfs_inode_ref */
2430 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
2431 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
2433 /* struct btrfs_inode_extref */
2434 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
2435 parent_objectid
, 64);
2436 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
2438 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
2440 /* struct btrfs_inode_item */
2441 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
2442 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
2443 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
2444 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
2445 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
2446 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
2447 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2448 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
2449 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
2450 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
2451 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2452 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
2453 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
2455 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
2457 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
2459 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
2460 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
2462 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
2464 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2465 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
2466 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
2467 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
2468 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2469 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
2470 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
2471 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2472 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
2473 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2475 /* struct btrfs_dev_extent */
2476 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
2478 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
2479 chunk_objectid
, 64);
2480 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
2482 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
2484 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
2486 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
2487 return (unsigned long)dev
+ ptr
;
2490 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
2491 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
2493 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
2495 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
2498 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
2500 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
2501 struct btrfs_tree_block_info
*item
,
2502 struct btrfs_disk_key
*key
)
2504 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2507 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
2508 struct btrfs_tree_block_info
*item
,
2509 struct btrfs_disk_key
*key
)
2511 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2514 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
2516 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
2518 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
2520 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
2523 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
2526 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
2528 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
2531 static inline u32
btrfs_extent_inline_ref_size(int type
)
2533 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
2534 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
2535 return sizeof(struct btrfs_extent_inline_ref
);
2536 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
2537 return sizeof(struct btrfs_shared_data_ref
) +
2538 sizeof(struct btrfs_extent_inline_ref
);
2539 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
2540 return sizeof(struct btrfs_extent_data_ref
) +
2541 offsetof(struct btrfs_extent_inline_ref
, offset
);
2546 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
2547 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
2549 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
2550 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
2552 /* struct btrfs_node */
2553 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
2554 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
2555 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
2557 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
2560 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
2563 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2564 sizeof(struct btrfs_key_ptr
) * nr
;
2565 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
2568 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
2572 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2573 sizeof(struct btrfs_key_ptr
) * nr
;
2574 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2577 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
2580 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2581 sizeof(struct btrfs_key_ptr
) * nr
;
2582 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
2585 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
2589 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2590 sizeof(struct btrfs_key_ptr
) * nr
;
2591 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2594 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
2596 return offsetof(struct btrfs_node
, ptrs
) +
2597 sizeof(struct btrfs_key_ptr
) * nr
;
2600 void btrfs_node_key(struct extent_buffer
*eb
,
2601 struct btrfs_disk_key
*disk_key
, int nr
);
2603 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
2604 struct btrfs_disk_key
*disk_key
, int nr
)
2607 ptr
= btrfs_node_key_ptr_offset(nr
);
2608 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
2609 struct btrfs_key_ptr
, key
, disk_key
);
2612 /* struct btrfs_item */
2613 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
2614 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
2615 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
2616 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
2618 static inline unsigned long btrfs_item_nr_offset(int nr
)
2620 return offsetof(struct btrfs_leaf
, items
) +
2621 sizeof(struct btrfs_item
) * nr
;
2624 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
2626 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
2629 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
2630 struct btrfs_item
*item
)
2632 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
2635 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
2637 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
2640 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
2642 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
2645 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
2647 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
2650 static inline void btrfs_item_key(struct extent_buffer
*eb
,
2651 struct btrfs_disk_key
*disk_key
, int nr
)
2653 struct btrfs_item
*item
= btrfs_item_nr(nr
);
2654 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2657 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
2658 struct btrfs_disk_key
*disk_key
, int nr
)
2660 struct btrfs_item
*item
= btrfs_item_nr(nr
);
2661 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2664 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
2667 * struct btrfs_root_ref
2669 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
2670 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
2671 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
2673 /* struct btrfs_dir_item */
2674 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2675 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2676 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2677 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2678 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
2679 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
2681 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
2683 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
2686 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
2687 struct btrfs_dir_item
*item
,
2688 struct btrfs_disk_key
*key
)
2690 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2693 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2694 struct btrfs_dir_item
*item
,
2695 struct btrfs_disk_key
*key
)
2697 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2700 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2702 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2704 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2707 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
2708 struct btrfs_free_space_header
*h
,
2709 struct btrfs_disk_key
*key
)
2711 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2714 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2715 struct btrfs_free_space_header
*h
,
2716 struct btrfs_disk_key
*key
)
2718 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2721 /* struct btrfs_disk_key */
2722 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2724 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2725 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2727 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2728 struct btrfs_disk_key
*disk
)
2730 cpu
->offset
= le64_to_cpu(disk
->offset
);
2731 cpu
->type
= disk
->type
;
2732 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2735 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2736 struct btrfs_key
*cpu
)
2738 disk
->offset
= cpu_to_le64(cpu
->offset
);
2739 disk
->type
= cpu
->type
;
2740 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2743 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2744 struct btrfs_key
*key
, int nr
)
2746 struct btrfs_disk_key disk_key
;
2747 btrfs_node_key(eb
, &disk_key
, nr
);
2748 btrfs_disk_key_to_cpu(key
, &disk_key
);
2751 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2752 struct btrfs_key
*key
, int nr
)
2754 struct btrfs_disk_key disk_key
;
2755 btrfs_item_key(eb
, &disk_key
, nr
);
2756 btrfs_disk_key_to_cpu(key
, &disk_key
);
2759 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2760 struct btrfs_dir_item
*item
,
2761 struct btrfs_key
*key
)
2763 struct btrfs_disk_key disk_key
;
2764 btrfs_dir_item_key(eb
, item
, &disk_key
);
2765 btrfs_disk_key_to_cpu(key
, &disk_key
);
2769 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2774 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2779 /* struct btrfs_header */
2780 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2781 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2783 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2784 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2785 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2786 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2787 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
2789 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
2790 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
2792 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
2794 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2796 return (btrfs_header_flags(eb
) & flag
) == flag
;
2799 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2801 u64 flags
= btrfs_header_flags(eb
);
2802 btrfs_set_header_flags(eb
, flags
| flag
);
2803 return (flags
& flag
) == flag
;
2806 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2808 u64 flags
= btrfs_header_flags(eb
);
2809 btrfs_set_header_flags(eb
, flags
& ~flag
);
2810 return (flags
& flag
) == flag
;
2813 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2815 u64 flags
= btrfs_header_flags(eb
);
2816 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2819 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2822 u64 flags
= btrfs_header_flags(eb
);
2823 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2824 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2825 btrfs_set_header_flags(eb
, flags
);
2828 static inline unsigned long btrfs_header_fsid(void)
2830 return offsetof(struct btrfs_header
, fsid
);
2833 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2835 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
2838 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2840 return btrfs_header_level(eb
) == 0;
2843 /* struct btrfs_root_item */
2844 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2846 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2847 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2848 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2850 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2852 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2853 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2854 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2855 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2856 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2857 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2858 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2859 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2861 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2863 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2865 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2867 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2869 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2872 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2874 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2877 static inline bool btrfs_root_dead(struct btrfs_root
*root
)
2879 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD
)) != 0;
2882 /* struct btrfs_root_backup */
2883 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2885 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2887 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2888 tree_root_level
, 8);
2890 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2892 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2893 chunk_root_gen
, 64);
2894 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2895 chunk_root_level
, 8);
2897 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2899 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2900 extent_root_gen
, 64);
2901 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2902 extent_root_level
, 8);
2904 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2906 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2908 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2911 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2913 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2915 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2918 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2920 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2922 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2923 csum_root_level
, 8);
2924 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2926 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2928 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2931 /* struct btrfs_balance_item */
2932 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2934 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2935 struct btrfs_balance_item
*bi
,
2936 struct btrfs_disk_balance_args
*ba
)
2938 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2941 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2942 struct btrfs_balance_item
*bi
,
2943 struct btrfs_disk_balance_args
*ba
)
2945 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2948 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2949 struct btrfs_balance_item
*bi
,
2950 struct btrfs_disk_balance_args
*ba
)
2952 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2955 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2956 struct btrfs_balance_item
*bi
,
2957 struct btrfs_disk_balance_args
*ba
)
2959 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2962 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2963 struct btrfs_balance_item
*bi
,
2964 struct btrfs_disk_balance_args
*ba
)
2966 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2969 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2970 struct btrfs_balance_item
*bi
,
2971 struct btrfs_disk_balance_args
*ba
)
2973 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2977 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2978 struct btrfs_disk_balance_args
*disk
)
2980 memset(cpu
, 0, sizeof(*cpu
));
2982 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2983 cpu
->usage
= le64_to_cpu(disk
->usage
);
2984 cpu
->devid
= le64_to_cpu(disk
->devid
);
2985 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2986 cpu
->pend
= le64_to_cpu(disk
->pend
);
2987 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2988 cpu
->vend
= le64_to_cpu(disk
->vend
);
2989 cpu
->target
= le64_to_cpu(disk
->target
);
2990 cpu
->flags
= le64_to_cpu(disk
->flags
);
2991 cpu
->limit
= le64_to_cpu(disk
->limit
);
2995 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2996 struct btrfs_balance_args
*cpu
)
2998 memset(disk
, 0, sizeof(*disk
));
3000 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
3001 disk
->usage
= cpu_to_le64(cpu
->usage
);
3002 disk
->devid
= cpu_to_le64(cpu
->devid
);
3003 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
3004 disk
->pend
= cpu_to_le64(cpu
->pend
);
3005 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
3006 disk
->vend
= cpu_to_le64(cpu
->vend
);
3007 disk
->target
= cpu_to_le64(cpu
->target
);
3008 disk
->flags
= cpu_to_le64(cpu
->flags
);
3009 disk
->limit
= cpu_to_le64(cpu
->limit
);
3012 /* struct btrfs_super_block */
3013 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
3014 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
3015 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
3017 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
3018 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
3019 struct btrfs_super_block
, sys_chunk_array_size
, 32);
3020 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
3021 struct btrfs_super_block
, chunk_root_generation
, 64);
3022 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
3024 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
3026 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
3027 chunk_root_level
, 8);
3028 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
3030 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
3031 log_root_transid
, 64);
3032 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
3034 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
3036 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
3038 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
3040 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
3042 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
3044 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
3045 root_dir_objectid
, 64);
3046 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
3048 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
3050 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
3051 compat_ro_flags
, 64);
3052 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
3053 incompat_flags
, 64);
3054 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
3056 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
3057 cache_generation
, 64);
3058 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
3059 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
3060 uuid_tree_generation
, 64);
3062 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
3064 u16 t
= btrfs_super_csum_type(s
);
3066 * csum type is validated at mount time
3068 return btrfs_csum_sizes
[t
];
3071 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
3073 return offsetof(struct btrfs_leaf
, items
);
3076 /* struct btrfs_file_extent_item */
3077 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
3078 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
3079 struct btrfs_file_extent_item
, disk_bytenr
, 64);
3080 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
3081 struct btrfs_file_extent_item
, offset
, 64);
3082 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
3083 struct btrfs_file_extent_item
, generation
, 64);
3084 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
3085 struct btrfs_file_extent_item
, num_bytes
, 64);
3086 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
3087 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
3088 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
3089 struct btrfs_file_extent_item
, compression
, 8);
3091 static inline unsigned long
3092 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
3094 return (unsigned long)e
+ BTRFS_FILE_EXTENT_INLINE_DATA_START
;
3097 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
3099 return BTRFS_FILE_EXTENT_INLINE_DATA_START
+ datasize
;
3102 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
3104 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
3106 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
3107 disk_num_bytes
, 64);
3108 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
3110 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
3112 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
3114 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
3116 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
3118 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
3119 other_encoding
, 16);
3122 * this returns the number of bytes used by the item on disk, minus the
3123 * size of any extent headers. If a file is compressed on disk, this is
3124 * the compressed size
3126 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
3127 struct btrfs_item
*e
)
3129 return btrfs_item_size(eb
, e
) - BTRFS_FILE_EXTENT_INLINE_DATA_START
;
3132 /* this returns the number of file bytes represented by the inline item.
3133 * If an item is compressed, this is the uncompressed size
3135 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
3137 struct btrfs_file_extent_item
*fi
)
3139 struct btrfs_map_token token
;
3141 btrfs_init_map_token(&token
);
3143 * return the space used on disk if this item isn't
3144 * compressed or encoded
3146 if (btrfs_token_file_extent_compression(eb
, fi
, &token
) == 0 &&
3147 btrfs_token_file_extent_encryption(eb
, fi
, &token
) == 0 &&
3148 btrfs_token_file_extent_other_encoding(eb
, fi
, &token
) == 0) {
3149 return btrfs_file_extent_inline_item_len(eb
,
3150 btrfs_item_nr(slot
));
3153 /* otherwise use the ram bytes field */
3154 return btrfs_token_file_extent_ram_bytes(eb
, fi
, &token
);
3158 /* btrfs_dev_stats_item */
3159 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
3160 struct btrfs_dev_stats_item
*ptr
,
3165 read_extent_buffer(eb
, &val
,
3166 offsetof(struct btrfs_dev_stats_item
, values
) +
3167 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
3172 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
3173 struct btrfs_dev_stats_item
*ptr
,
3176 write_extent_buffer(eb
, &val
,
3177 offsetof(struct btrfs_dev_stats_item
, values
) +
3178 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
3182 /* btrfs_qgroup_status_item */
3183 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
3185 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
3187 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
3189 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
3192 /* btrfs_qgroup_info_item */
3193 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
3195 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
3196 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
3198 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
3199 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
3202 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
3203 struct btrfs_qgroup_info_item
, generation
, 64);
3204 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
3206 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
3207 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
3208 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
3210 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
3211 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
3213 /* btrfs_qgroup_limit_item */
3214 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
3216 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
3218 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
3220 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
3222 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
3225 /* btrfs_dev_replace_item */
3226 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
3227 struct btrfs_dev_replace_item
, src_devid
, 64);
3228 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
3229 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
3231 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
3233 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
3235 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
3237 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
3238 num_write_errors
, 64);
3239 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
3240 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
3242 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
3244 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
3247 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
3248 struct btrfs_dev_replace_item
, src_devid
, 64);
3249 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
3250 struct btrfs_dev_replace_item
,
3251 cont_reading_from_srcdev_mode
, 64);
3252 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
3253 struct btrfs_dev_replace_item
, replace_state
, 64);
3254 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
3255 struct btrfs_dev_replace_item
, time_started
, 64);
3256 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
3257 struct btrfs_dev_replace_item
, time_stopped
, 64);
3258 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
3259 struct btrfs_dev_replace_item
, num_write_errors
, 64);
3260 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
3261 struct btrfs_dev_replace_item
,
3262 num_uncorrectable_read_errors
, 64);
3263 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
3264 struct btrfs_dev_replace_item
, cursor_left
, 64);
3265 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
3266 struct btrfs_dev_replace_item
, cursor_right
, 64);
3268 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
3270 return sb
->s_fs_info
;
3273 /* helper function to cast into the data area of the leaf. */
3274 #define btrfs_item_ptr(leaf, slot, type) \
3275 ((type *)(btrfs_leaf_data(leaf) + \
3276 btrfs_item_offset_nr(leaf, slot)))
3278 #define btrfs_item_ptr_offset(leaf, slot) \
3279 ((unsigned long)(btrfs_leaf_data(leaf) + \
3280 btrfs_item_offset_nr(leaf, slot)))
3282 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
3284 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
3285 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
3288 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
3290 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
3294 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
3297 return (root
->nodesize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
3302 * Doing a truncate won't result in new nodes or leaves, just what we need for
3305 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
3308 return root
->nodesize
* BTRFS_MAX_LEVEL
* num_items
;
3311 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle
*trans
,
3312 struct btrfs_root
*root
);
3313 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle
*trans
,
3314 struct btrfs_root
*root
);
3315 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
3316 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
3317 struct btrfs_root
*root
, unsigned long count
);
3318 int btrfs_async_run_delayed_refs(struct btrfs_root
*root
,
3319 unsigned long count
, int wait
);
3320 int btrfs_lookup_data_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
3321 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
3322 struct btrfs_root
*root
, u64 bytenr
,
3323 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
3324 int btrfs_pin_extent(struct btrfs_root
*root
,
3325 u64 bytenr
, u64 num
, int reserved
);
3326 int btrfs_pin_extent_for_log_replay(struct btrfs_root
*root
,
3327 u64 bytenr
, u64 num_bytes
);
3328 int btrfs_exclude_logged_extents(struct btrfs_root
*root
,
3329 struct extent_buffer
*eb
);
3330 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
3331 struct btrfs_root
*root
,
3332 u64 objectid
, u64 offset
, u64 bytenr
);
3333 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
3334 struct btrfs_fs_info
*info
,
3336 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
3337 int get_block_group_index(struct btrfs_block_group_cache
*cache
);
3338 struct extent_buffer
*btrfs_alloc_tree_block(struct btrfs_trans_handle
*trans
,
3339 struct btrfs_root
*root
, u64 parent
,
3341 struct btrfs_disk_key
*key
, int level
,
3342 u64 hint
, u64 empty_size
);
3343 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
3344 struct btrfs_root
*root
,
3345 struct extent_buffer
*buf
,
3346 u64 parent
, int last_ref
);
3347 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
3348 struct btrfs_root
*root
,
3349 u64 root_objectid
, u64 owner
,
3350 u64 offset
, struct btrfs_key
*ins
);
3351 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
3352 struct btrfs_root
*root
,
3353 u64 root_objectid
, u64 owner
, u64 offset
,
3354 struct btrfs_key
*ins
);
3355 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 num_bytes
,
3356 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
3357 struct btrfs_key
*ins
, int is_data
, int delalloc
);
3358 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3359 struct extent_buffer
*buf
, int full_backref
);
3360 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3361 struct extent_buffer
*buf
, int full_backref
);
3362 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
3363 struct btrfs_root
*root
,
3364 u64 bytenr
, u64 num_bytes
, u64 flags
,
3365 int level
, int is_data
);
3366 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
3367 struct btrfs_root
*root
,
3368 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
3369 u64 owner
, u64 offset
, int no_quota
);
3371 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
,
3373 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
3374 u64 start
, u64 len
);
3375 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
3376 struct btrfs_root
*root
);
3377 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
3378 struct btrfs_root
*root
);
3379 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
3380 struct btrfs_root
*root
,
3381 u64 bytenr
, u64 num_bytes
, u64 parent
,
3382 u64 root_objectid
, u64 owner
, u64 offset
, int no_quota
);
3384 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
3385 struct btrfs_root
*root
);
3386 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
3387 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
3388 int btrfs_read_block_groups(struct btrfs_root
*root
);
3389 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
3390 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
3391 struct btrfs_root
*root
, u64 bytes_used
,
3392 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
3394 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
3395 struct btrfs_root
*root
, u64 group_start
,
3396 struct extent_map
*em
);
3397 void btrfs_delete_unused_bgs(struct btrfs_fs_info
*fs_info
);
3398 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
3399 struct btrfs_root
*root
);
3400 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
3401 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
3403 enum btrfs_reserve_flush_enum
{
3404 /* If we are in the transaction, we can't flush anything.*/
3405 BTRFS_RESERVE_NO_FLUSH
,
3407 * Flushing delalloc may cause deadlock somewhere, in this
3408 * case, use FLUSH LIMIT
3410 BTRFS_RESERVE_FLUSH_LIMIT
,
3411 BTRFS_RESERVE_FLUSH_ALL
,
3414 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
3415 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
3416 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
3417 struct btrfs_root
*root
);
3418 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
3419 struct inode
*inode
);
3420 void btrfs_orphan_release_metadata(struct inode
*inode
);
3421 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
3422 struct btrfs_block_rsv
*rsv
,
3424 u64
*qgroup_reserved
, bool use_global_rsv
);
3425 void btrfs_subvolume_release_metadata(struct btrfs_root
*root
,
3426 struct btrfs_block_rsv
*rsv
,
3427 u64 qgroup_reserved
);
3428 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
3429 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
3430 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
3431 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
3432 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
3433 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
3434 unsigned short type
);
3435 void btrfs_free_block_rsv(struct btrfs_root
*root
,
3436 struct btrfs_block_rsv
*rsv
);
3437 int btrfs_block_rsv_add(struct btrfs_root
*root
,
3438 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
3439 enum btrfs_reserve_flush_enum flush
);
3440 int btrfs_block_rsv_check(struct btrfs_root
*root
,
3441 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
3442 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
3443 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
3444 enum btrfs_reserve_flush_enum flush
);
3445 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
3446 struct btrfs_block_rsv
*dst_rsv
,
3448 int btrfs_cond_migrate_bytes(struct btrfs_fs_info
*fs_info
,
3449 struct btrfs_block_rsv
*dest
, u64 num_bytes
,
3451 void btrfs_block_rsv_release(struct btrfs_root
*root
,
3452 struct btrfs_block_rsv
*block_rsv
,
3454 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
3455 struct btrfs_block_group_cache
*cache
);
3456 void btrfs_set_block_group_rw(struct btrfs_root
*root
,
3457 struct btrfs_block_group_cache
*cache
);
3458 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
3459 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
3460 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
3461 u64 start
, u64 end
);
3462 int btrfs_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
3463 u64 num_bytes
, u64
*actual_bytes
);
3464 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
3465 struct btrfs_root
*root
, u64 type
);
3466 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
3468 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
3469 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
3470 struct btrfs_fs_info
*fs_info
);
3471 int __get_raid_index(u64 flags
);
3472 int btrfs_start_write_no_snapshoting(struct btrfs_root
*root
);
3473 void btrfs_end_write_no_snapshoting(struct btrfs_root
*root
);
3475 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
3476 int level
, int *slot
);
3477 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
3478 int btrfs_previous_item(struct btrfs_root
*root
,
3479 struct btrfs_path
*path
, u64 min_objectid
,
3481 int btrfs_previous_extent_item(struct btrfs_root
*root
,
3482 struct btrfs_path
*path
, u64 min_objectid
);
3483 void btrfs_set_item_key_safe(struct btrfs_root
*root
, struct btrfs_path
*path
,
3484 struct btrfs_key
*new_key
);
3485 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
3486 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
3487 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
3488 struct btrfs_key
*key
, int lowest_level
,
3490 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
3491 struct btrfs_path
*path
,
3493 enum btrfs_compare_tree_result
{
3494 BTRFS_COMPARE_TREE_NEW
,
3495 BTRFS_COMPARE_TREE_DELETED
,
3496 BTRFS_COMPARE_TREE_CHANGED
,
3497 BTRFS_COMPARE_TREE_SAME
,
3499 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
3500 struct btrfs_root
*right_root
,
3501 struct btrfs_path
*left_path
,
3502 struct btrfs_path
*right_path
,
3503 struct btrfs_key
*key
,
3504 enum btrfs_compare_tree_result result
,
3506 int btrfs_compare_trees(struct btrfs_root
*left_root
,
3507 struct btrfs_root
*right_root
,
3508 btrfs_changed_cb_t cb
, void *ctx
);
3509 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
3510 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3511 struct extent_buffer
*parent
, int parent_slot
,
3512 struct extent_buffer
**cow_ret
);
3513 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
3514 struct btrfs_root
*root
,
3515 struct extent_buffer
*buf
,
3516 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
3517 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
3518 struct extent_buffer
*buf
);
3519 void btrfs_extend_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
3521 void btrfs_truncate_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
3522 u32 new_size
, int from_end
);
3523 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
3524 struct btrfs_root
*root
,
3525 struct btrfs_path
*path
,
3526 struct btrfs_key
*new_key
,
3527 unsigned long split_offset
);
3528 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
3529 struct btrfs_root
*root
,
3530 struct btrfs_path
*path
,
3531 struct btrfs_key
*new_key
);
3532 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*path
,
3533 u64 inum
, u64 ioff
, u8 key_type
, struct btrfs_key
*found_key
);
3534 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
3535 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
3537 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
3538 struct btrfs_path
*p
, u64 time_seq
);
3539 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
3540 struct btrfs_key
*key
, struct btrfs_path
*p
,
3541 int find_higher
, int return_any
);
3542 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
3543 struct btrfs_root
*root
, struct extent_buffer
*parent
,
3544 int start_slot
, u64
*last_ret
,
3545 struct btrfs_key
*progress
);
3546 void btrfs_release_path(struct btrfs_path
*p
);
3547 struct btrfs_path
*btrfs_alloc_path(void);
3548 void btrfs_free_path(struct btrfs_path
*p
);
3549 void btrfs_set_path_blocking(struct btrfs_path
*p
);
3550 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
3551 struct extent_buffer
*held
, int held_rw
);
3552 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
3554 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3555 struct btrfs_path
*path
, int slot
, int nr
);
3556 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
3557 struct btrfs_root
*root
,
3558 struct btrfs_path
*path
)
3560 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
3563 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
3564 struct btrfs_key
*cpu_key
, u32
*data_size
,
3565 u32 total_data
, u32 total_size
, int nr
);
3566 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
3567 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
3568 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
3569 struct btrfs_root
*root
,
3570 struct btrfs_path
*path
,
3571 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
3573 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
3574 struct btrfs_root
*root
,
3575 struct btrfs_path
*path
,
3576 struct btrfs_key
*key
,
3579 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
3582 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3583 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3584 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
3586 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
3587 struct btrfs_path
*p
, u64 time_seq
)
3590 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
3591 return btrfs_next_old_leaf(root
, p
, time_seq
);
3594 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
3596 return btrfs_next_old_item(root
, p
, 0);
3598 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
3599 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
3600 struct btrfs_block_rsv
*block_rsv
,
3601 int update_ref
, int for_reloc
);
3602 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
3603 struct btrfs_root
*root
,
3604 struct extent_buffer
*node
,
3605 struct extent_buffer
*parent
);
3606 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
3609 * Get synced with close_ctree()
3612 return fs_info
->closing
;
3616 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3617 * anything except sleeping. This function is used to check the status of
3620 static inline int btrfs_need_cleaner_sleep(struct btrfs_root
*root
)
3622 return (root
->fs_info
->sb
->s_flags
& MS_RDONLY
||
3623 btrfs_fs_closing(root
->fs_info
));
3626 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
3628 kfree(fs_info
->balance_ctl
);
3629 kfree(fs_info
->delayed_root
);
3630 kfree(fs_info
->extent_root
);
3631 kfree(fs_info
->tree_root
);
3632 kfree(fs_info
->chunk_root
);
3633 kfree(fs_info
->dev_root
);
3634 kfree(fs_info
->csum_root
);
3635 kfree(fs_info
->quota_root
);
3636 kfree(fs_info
->uuid_root
);
3637 kfree(fs_info
->super_copy
);
3638 kfree(fs_info
->super_for_commit
);
3639 security_free_mnt_opts(&fs_info
->security_opts
);
3643 /* tree mod log functions from ctree.c */
3644 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3645 struct seq_list
*elem
);
3646 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3647 struct seq_list
*elem
);
3648 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
3651 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
3652 struct btrfs_path
*path
,
3653 u64 root_id
, u64 ref_id
);
3654 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
3655 struct btrfs_root
*tree_root
,
3656 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
3657 const char *name
, int name_len
);
3658 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
3659 struct btrfs_root
*tree_root
,
3660 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
3661 const char *name
, int name_len
);
3662 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3663 struct btrfs_key
*key
);
3664 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
3665 *root
, struct btrfs_key
*key
, struct btrfs_root_item
3667 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
3668 struct btrfs_root
*root
,
3669 struct btrfs_key
*key
,
3670 struct btrfs_root_item
*item
);
3671 int btrfs_find_root(struct btrfs_root
*root
, struct btrfs_key
*search_key
,
3672 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
3673 struct btrfs_key
*root_key
);
3674 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
3675 void btrfs_set_root_node(struct btrfs_root_item
*item
,
3676 struct extent_buffer
*node
);
3677 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
3678 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
3679 struct btrfs_root
*root
);
3682 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
,
3683 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
3685 int btrfs_uuid_tree_rem(struct btrfs_trans_handle
*trans
,
3686 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
3688 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
,
3689 int (*check_func
)(struct btrfs_fs_info
*, u8
*, u8
,
3693 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
3694 const char *name
, int name_len
);
3695 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
3696 struct btrfs_root
*root
, const char *name
,
3697 int name_len
, struct inode
*dir
,
3698 struct btrfs_key
*location
, u8 type
, u64 index
);
3699 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3700 struct btrfs_root
*root
,
3701 struct btrfs_path
*path
, u64 dir
,
3702 const char *name
, int name_len
,
3704 struct btrfs_dir_item
*
3705 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3706 struct btrfs_root
*root
,
3707 struct btrfs_path
*path
, u64 dir
,
3708 u64 objectid
, const char *name
, int name_len
,
3710 struct btrfs_dir_item
*
3711 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3712 struct btrfs_path
*path
, u64 dirid
,
3713 const char *name
, int name_len
);
3714 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3715 struct btrfs_root
*root
,
3716 struct btrfs_path
*path
,
3717 struct btrfs_dir_item
*di
);
3718 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3719 struct btrfs_root
*root
,
3720 struct btrfs_path
*path
, u64 objectid
,
3721 const char *name
, u16 name_len
,
3722 const void *data
, u16 data_len
);
3723 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3724 struct btrfs_root
*root
,
3725 struct btrfs_path
*path
, u64 dir
,
3726 const char *name
, u16 name_len
,
3728 int verify_dir_item(struct btrfs_root
*root
,
3729 struct extent_buffer
*leaf
,
3730 struct btrfs_dir_item
*dir_item
);
3731 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
3732 struct btrfs_path
*path
,
3737 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3738 struct btrfs_root
*root
, u64 offset
);
3739 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3740 struct btrfs_root
*root
, u64 offset
);
3741 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3744 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3745 struct btrfs_root
*root
,
3746 const char *name
, int name_len
,
3747 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3748 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3749 struct btrfs_root
*root
,
3750 const char *name
, int name_len
,
3751 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3752 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3753 struct btrfs_root
*root
,
3754 struct btrfs_path
*path
, u64 objectid
);
3755 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3756 *root
, struct btrfs_path
*path
,
3757 struct btrfs_key
*location
, int mod
);
3759 struct btrfs_inode_extref
*
3760 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3761 struct btrfs_root
*root
,
3762 struct btrfs_path
*path
,
3763 const char *name
, int name_len
,
3764 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3767 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3768 u64 ref_objectid
, const char *name
,
3770 struct btrfs_inode_extref
**extref_ret
);
3773 struct btrfs_dio_private
;
3774 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3775 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3776 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3777 struct bio
*bio
, u32
*dst
);
3778 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3779 struct bio
*bio
, u64 logical_offset
);
3780 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3781 struct btrfs_root
*root
,
3782 u64 objectid
, u64 pos
,
3783 u64 disk_offset
, u64 disk_num_bytes
,
3784 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3785 u8 compression
, u8 encryption
, u16 other_encoding
);
3786 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3787 struct btrfs_root
*root
,
3788 struct btrfs_path
*path
, u64 objectid
,
3789 u64 bytenr
, int mod
);
3790 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3791 struct btrfs_root
*root
,
3792 struct btrfs_ordered_sum
*sums
);
3793 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3794 struct bio
*bio
, u64 file_start
, int contig
);
3795 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3796 struct list_head
*list
, int search_commit
);
3797 void btrfs_extent_item_to_extent_map(struct inode
*inode
,
3798 const struct btrfs_path
*path
,
3799 struct btrfs_file_extent_item
*fi
,
3800 const bool new_inline
,
3801 struct extent_map
*em
);
3804 struct btrfs_delalloc_work
{
3805 struct inode
*inode
;
3808 struct completion completion
;
3809 struct list_head list
;
3810 struct btrfs_work work
;
3813 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3814 int wait
, int delay_iput
);
3815 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3817 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3818 size_t pg_offset
, u64 start
, u64 len
,
3820 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
3821 u64
*orig_start
, u64
*orig_block_len
,
3824 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3825 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3826 #define ClearPageChecked ClearPageFsMisc
3827 #define SetPageChecked SetPageFsMisc
3828 #define PageChecked PageFsMisc
3831 /* This forces readahead on a given range of bytes in an inode */
3832 static inline void btrfs_force_ra(struct address_space
*mapping
,
3833 struct file_ra_state
*ra
, struct file
*file
,
3834 pgoff_t offset
, unsigned long req_size
)
3836 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3839 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3840 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3841 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3842 struct btrfs_root
*root
,
3843 struct inode
*dir
, struct inode
*inode
,
3844 const char *name
, int name_len
);
3845 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3846 struct inode
*parent_inode
, struct inode
*inode
,
3847 const char *name
, int name_len
, int add_backref
, u64 index
);
3848 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3849 struct btrfs_root
*root
,
3850 struct inode
*dir
, u64 objectid
,
3851 const char *name
, int name_len
);
3852 int btrfs_truncate_page(struct inode
*inode
, loff_t from
, loff_t len
,
3854 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3855 struct btrfs_root
*root
,
3856 struct inode
*inode
, u64 new_size
,
3859 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3860 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, int delay_iput
,
3862 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3863 struct extent_state
**cached_state
);
3864 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3865 struct btrfs_root
*new_root
,
3866 struct btrfs_root
*parent_root
,
3868 int btrfs_merge_bio_hook(int rw
, struct page
*page
, unsigned long offset
,
3869 size_t size
, struct bio
*bio
,
3870 unsigned long bio_flags
);
3871 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3872 int btrfs_readpage(struct file
*file
, struct page
*page
);
3873 void btrfs_evict_inode(struct inode
*inode
);
3874 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3875 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3876 void btrfs_destroy_inode(struct inode
*inode
);
3877 int btrfs_drop_inode(struct inode
*inode
);
3878 int btrfs_init_cachep(void);
3879 void btrfs_destroy_cachep(void);
3880 long btrfs_ioctl_trans_end(struct file
*file
);
3881 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3882 struct btrfs_root
*root
, int *was_new
);
3883 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3884 size_t pg_offset
, u64 start
, u64 end
,
3886 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3887 struct btrfs_root
*root
,
3888 struct inode
*inode
);
3889 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3890 struct btrfs_root
*root
, struct inode
*inode
);
3891 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3892 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3893 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3894 struct btrfs_root
*root
);
3895 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3896 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3897 void btrfs_add_delayed_iput(struct inode
*inode
);
3898 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3899 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3900 u64 start
, u64 num_bytes
, u64 min_size
,
3901 loff_t actual_len
, u64
*alloc_hint
);
3902 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3903 struct btrfs_trans_handle
*trans
, int mode
,
3904 u64 start
, u64 num_bytes
, u64 min_size
,
3905 loff_t actual_len
, u64
*alloc_hint
);
3906 int btrfs_inode_check_errors(struct inode
*inode
);
3907 extern const struct dentry_operations btrfs_dentry_operations
;
3910 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3911 void btrfs_update_iflags(struct inode
*inode
);
3912 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3913 int btrfs_is_empty_uuid(u8
*uuid
);
3914 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3915 struct btrfs_ioctl_defrag_range_args
*range
,
3916 u64 newer_than
, unsigned long max_pages
);
3917 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3918 struct btrfs_ioctl_space_info
*space
);
3919 void update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
, int lock
,
3920 struct btrfs_ioctl_balance_args
*bargs
);
3924 int btrfs_auto_defrag_init(void);
3925 void btrfs_auto_defrag_exit(void);
3926 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3927 struct inode
*inode
);
3928 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3929 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3930 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3931 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3933 extern const struct file_operations btrfs_file_operations
;
3934 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3935 struct btrfs_root
*root
, struct inode
*inode
,
3936 struct btrfs_path
*path
, u64 start
, u64 end
,
3937 u64
*drop_end
, int drop_cache
,
3939 u32 extent_item_size
,
3941 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3942 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3943 u64 end
, int drop_cache
);
3944 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3945 struct inode
*inode
, u64 start
, u64 end
);
3946 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3947 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3948 struct page
**pages
, size_t num_pages
,
3949 loff_t pos
, size_t write_bytes
,
3950 struct extent_state
**cached
);
3951 int btrfs_fdatawrite_range(struct inode
*inode
, loff_t start
, loff_t end
);
3954 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3955 struct btrfs_root
*root
);
3958 int btrfs_init_sysfs(void);
3959 void btrfs_exit_sysfs(void);
3960 int btrfs_sysfs_add_one(struct btrfs_fs_info
*fs_info
);
3961 void btrfs_sysfs_remove_one(struct btrfs_fs_info
*fs_info
);
3964 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3967 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
3968 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3970 #ifdef CONFIG_PRINTK
3972 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3974 static inline __printf(2, 3)
3975 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3980 #define btrfs_emerg(fs_info, fmt, args...) \
3981 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3982 #define btrfs_alert(fs_info, fmt, args...) \
3983 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3984 #define btrfs_crit(fs_info, fmt, args...) \
3985 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3986 #define btrfs_err(fs_info, fmt, args...) \
3987 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3988 #define btrfs_warn(fs_info, fmt, args...) \
3989 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3990 #define btrfs_notice(fs_info, fmt, args...) \
3991 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3992 #define btrfs_info(fs_info, fmt, args...) \
3993 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3996 #define btrfs_debug(fs_info, fmt, args...) \
3997 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3999 #define btrfs_debug(fs_info, fmt, args...) \
4000 no_printk(KERN_DEBUG fmt, ##args)
4003 #ifdef CONFIG_BTRFS_ASSERT
4005 static inline void assfail(char *expr
, char *file
, int line
)
4007 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
4012 #define ASSERT(expr) \
4013 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
4015 #define ASSERT(expr) ((void)0)
4018 #define btrfs_assert()
4020 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
4021 unsigned int line
, int errno
, const char *fmt
, ...);
4024 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
4025 struct btrfs_root
*root
, const char *function
,
4026 unsigned int line
, int errno
);
4028 #define btrfs_set_fs_incompat(__fs_info, opt) \
4029 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4031 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
4034 struct btrfs_super_block
*disk_super
;
4037 disk_super
= fs_info
->super_copy
;
4038 features
= btrfs_super_incompat_flags(disk_super
);
4039 if (!(features
& flag
)) {
4040 spin_lock(&fs_info
->super_lock
);
4041 features
= btrfs_super_incompat_flags(disk_super
);
4042 if (!(features
& flag
)) {
4044 btrfs_set_super_incompat_flags(disk_super
, features
);
4045 btrfs_info(fs_info
, "setting %llu feature flag",
4048 spin_unlock(&fs_info
->super_lock
);
4052 #define btrfs_fs_incompat(fs_info, opt) \
4053 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4055 static inline int __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
4057 struct btrfs_super_block
*disk_super
;
4058 disk_super
= fs_info
->super_copy
;
4059 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
4063 * Call btrfs_abort_transaction as early as possible when an error condition is
4064 * detected, that way the exact line number is reported.
4067 #define btrfs_abort_transaction(trans, root, errno) \
4069 __btrfs_abort_transaction(trans, root, __func__, \
4073 #define btrfs_std_error(fs_info, errno) \
4076 __btrfs_std_error((fs_info), __func__, \
4077 __LINE__, (errno), NULL); \
4080 #define btrfs_error(fs_info, errno, fmt, args...) \
4082 __btrfs_std_error((fs_info), __func__, __LINE__, \
4083 (errno), fmt, ##args); \
4087 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
4088 unsigned int line
, int errno
, const char *fmt
, ...);
4091 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
4092 * will panic(). Otherwise we BUG() here.
4094 #define btrfs_panic(fs_info, errno, fmt, args...) \
4096 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
4101 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
4102 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
4103 int btrfs_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
4104 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
4105 struct inode
*inode
, struct inode
*dir
);
4107 #define btrfs_get_acl NULL
4108 #define btrfs_set_acl NULL
4109 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
4110 struct inode
*inode
, struct inode
*dir
)
4117 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
4118 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
4119 struct btrfs_root
*root
);
4120 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
4121 struct btrfs_root
*root
);
4122 int btrfs_recover_relocation(struct btrfs_root
*root
);
4123 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
4124 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
4125 struct btrfs_root
*root
, struct extent_buffer
*buf
,
4126 struct extent_buffer
*cow
);
4127 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
4128 struct btrfs_pending_snapshot
*pending
,
4129 u64
*bytes_to_reserve
);
4130 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
4131 struct btrfs_pending_snapshot
*pending
);
4134 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
4135 u64 end
, struct btrfs_scrub_progress
*progress
,
4136 int readonly
, int is_dev_replace
);
4137 void btrfs_scrub_pause(struct btrfs_root
*root
);
4138 void btrfs_scrub_continue(struct btrfs_root
*root
);
4139 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
4140 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
4141 struct btrfs_device
*dev
);
4142 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
4143 struct btrfs_scrub_progress
*progress
);
4146 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info
*fs_info
);
4147 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info
*fs_info
);
4148 void btrfs_bio_counter_sub(struct btrfs_fs_info
*fs_info
, s64 amount
);
4150 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info
*fs_info
)
4152 btrfs_bio_counter_sub(fs_info
, 1);
4156 struct reada_control
{
4157 struct btrfs_root
*root
; /* tree to prefetch */
4158 struct btrfs_key key_start
;
4159 struct btrfs_key key_end
; /* exclusive */
4162 wait_queue_head_t wait
;
4164 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
4165 struct btrfs_key
*start
, struct btrfs_key
*end
);
4166 int btrfs_reada_wait(void *handle
);
4167 void btrfs_reada_detach(void *handle
);
4168 int btree_readahead_hook(struct btrfs_root
*root
, struct extent_buffer
*eb
,
4169 u64 start
, int err
);
4171 static inline int is_fstree(u64 rootid
)
4173 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
4174 (s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
)
4179 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
4181 return signal_pending(current
);
4184 /* Sanity test specific functions */
4185 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4186 void btrfs_test_destroy_inode(struct inode
*inode
);
4189 static inline int btrfs_test_is_dummy_root(struct btrfs_root
*root
)
4191 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4192 if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT
, &root
->state
)))