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/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <linux/slab.h>
30 #include <linux/kobject.h>
31 #include <trace/events/btrfs.h>
32 #include <asm/kmap_types.h>
33 #include <linux/pagemap.h>
34 #include "extent_io.h"
35 #include "extent_map.h"
36 #include "async-thread.h"
39 struct btrfs_trans_handle
;
40 struct btrfs_transaction
;
41 struct btrfs_pending_snapshot
;
42 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
43 extern struct kmem_cache
*btrfs_transaction_cachep
;
44 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
45 extern struct kmem_cache
*btrfs_path_cachep
;
46 extern struct kmem_cache
*btrfs_free_space_cachep
;
47 struct btrfs_ordered_sum
;
49 #define BTRFS_MAGIC "_BHRfS_M"
51 #define BTRFS_MAX_LEVEL 8
53 #define BTRFS_COMPAT_EXTENT_TREE_V0
56 * files bigger than this get some pre-flushing when they are added
57 * to the ordered operations list. That way we limit the total
58 * work done by the commit
60 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
62 /* holds pointers to all of the tree roots */
63 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
65 /* stores information about which extents are in use, and reference counts */
66 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
69 * chunk tree stores translations from logical -> physical block numbering
70 * the super block points to the chunk tree
72 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
75 * stores information about which areas of a given device are in use.
76 * one per device. The tree of tree roots points to the device tree
78 #define BTRFS_DEV_TREE_OBJECTID 4ULL
80 /* one per subvolume, storing files and directories */
81 #define BTRFS_FS_TREE_OBJECTID 5ULL
83 /* directory objectid inside the root tree */
84 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
86 /* holds checksums of all the data extents */
87 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
89 /* for storing balance parameters in the root tree */
90 #define BTRFS_BALANCE_OBJECTID -4ULL
92 /* orhpan objectid for tracking unlinked/truncated files */
93 #define BTRFS_ORPHAN_OBJECTID -5ULL
95 /* does write ahead logging to speed up fsyncs */
96 #define BTRFS_TREE_LOG_OBJECTID -6ULL
97 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
99 /* for space balancing */
100 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
101 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
104 * extent checksums all have this objectid
105 * this allows them to share the logging tree
108 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
110 /* For storing free space cache */
111 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
114 * The inode number assigned to the special inode for sotring
117 #define BTRFS_FREE_INO_OBJECTID -12ULL
119 /* dummy objectid represents multiple objectids */
120 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
123 * All files have objectids in this range.
125 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
126 #define BTRFS_LAST_FREE_OBJECTID -256ULL
127 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
131 * the device items go into the chunk tree. The key is in the form
132 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
134 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
136 #define BTRFS_BTREE_INODE_OBJECTID 1
138 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
141 * we can actually store much bigger names, but lets not confuse the rest
144 #define BTRFS_NAME_LEN 255
146 /* 32 bytes in various csum fields */
147 #define BTRFS_CSUM_SIZE 32
150 #define BTRFS_CSUM_TYPE_CRC32 0
152 static int btrfs_csum_sizes
[] = { 4, 0 };
154 /* four bytes for CRC32 */
155 #define BTRFS_EMPTY_DIR_SIZE 0
157 #define BTRFS_FT_UNKNOWN 0
158 #define BTRFS_FT_REG_FILE 1
159 #define BTRFS_FT_DIR 2
160 #define BTRFS_FT_CHRDEV 3
161 #define BTRFS_FT_BLKDEV 4
162 #define BTRFS_FT_FIFO 5
163 #define BTRFS_FT_SOCK 6
164 #define BTRFS_FT_SYMLINK 7
165 #define BTRFS_FT_XATTR 8
166 #define BTRFS_FT_MAX 9
169 * The key defines the order in the tree, and so it also defines (optimal)
172 * objectid corresponds to the inode number.
174 * type tells us things about the object, and is a kind of stream selector.
175 * so for a given inode, keys with type of 1 might refer to the inode data,
176 * type of 2 may point to file data in the btree and type == 3 may point to
179 * offset is the starting byte offset for this key in the stream.
181 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
182 * in cpu native order. Otherwise they are identical and their sizes
183 * should be the same (ie both packed)
185 struct btrfs_disk_key
{
189 } __attribute__ ((__packed__
));
195 } __attribute__ ((__packed__
));
197 struct btrfs_mapping_tree
{
198 struct extent_map_tree map_tree
;
201 struct btrfs_dev_item
{
202 /* the internal btrfs device id */
205 /* size of the device */
211 /* optimal io alignment for this device */
214 /* optimal io width for this device */
217 /* minimal io size for this device */
220 /* type and info about this device */
223 /* expected generation for this device */
227 * starting byte of this partition on the device,
228 * to allow for stripe alignment in the future
232 /* grouping information for allocation decisions */
235 /* seek speed 0-100 where 100 is fastest */
238 /* bandwidth 0-100 where 100 is fastest */
241 /* btrfs generated uuid for this device */
242 u8 uuid
[BTRFS_UUID_SIZE
];
244 /* uuid of FS who owns this device */
245 u8 fsid
[BTRFS_UUID_SIZE
];
246 } __attribute__ ((__packed__
));
248 struct btrfs_stripe
{
251 u8 dev_uuid
[BTRFS_UUID_SIZE
];
252 } __attribute__ ((__packed__
));
255 /* size of this chunk in bytes */
258 /* objectid of the root referencing this chunk */
264 /* optimal io alignment for this chunk */
267 /* optimal io width for this chunk */
270 /* minimal io size for this chunk */
273 /* 2^16 stripes is quite a lot, a second limit is the size of a single
278 /* sub stripes only matter for raid10 */
280 struct btrfs_stripe stripe
;
281 /* additional stripes go here */
282 } __attribute__ ((__packed__
));
284 #define BTRFS_FREE_SPACE_EXTENT 1
285 #define BTRFS_FREE_SPACE_BITMAP 2
287 struct btrfs_free_space_entry
{
291 } __attribute__ ((__packed__
));
293 struct btrfs_free_space_header
{
294 struct btrfs_disk_key location
;
298 } __attribute__ ((__packed__
));
300 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
302 BUG_ON(num_stripes
== 0);
303 return sizeof(struct btrfs_chunk
) +
304 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
307 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
308 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
314 /* Errors detected */
315 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
317 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
318 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
320 #define BTRFS_BACKREF_REV_MAX 256
321 #define BTRFS_BACKREF_REV_SHIFT 56
322 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
323 BTRFS_BACKREF_REV_SHIFT)
325 #define BTRFS_OLD_BACKREF_REV 0
326 #define BTRFS_MIXED_BACKREF_REV 1
329 * every tree block (leaf or node) starts with this header.
331 struct btrfs_header
{
332 /* these first four must match the super block */
333 u8 csum
[BTRFS_CSUM_SIZE
];
334 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
335 __le64 bytenr
; /* which block this node is supposed to live in */
338 /* allowed to be different from the super from here on down */
339 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
344 } __attribute__ ((__packed__
));
346 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
347 sizeof(struct btrfs_header)) / \
348 sizeof(struct btrfs_key_ptr))
349 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
350 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
351 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
352 sizeof(struct btrfs_item) - \
353 sizeof(struct btrfs_file_extent_item))
354 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
355 sizeof(struct btrfs_item) -\
356 sizeof(struct btrfs_dir_item))
360 * this is a very generous portion of the super block, giving us
361 * room to translate 14 chunks with 3 stripes each.
363 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
364 #define BTRFS_LABEL_SIZE 256
367 * just in case we somehow lose the roots and are not able to mount,
368 * we store an array of the roots from previous transactions
371 #define BTRFS_NUM_BACKUP_ROOTS 4
372 struct btrfs_root_backup
{
374 __le64 tree_root_gen
;
377 __le64 chunk_root_gen
;
380 __le64 extent_root_gen
;
389 __le64 csum_root_gen
;
399 u8 extent_root_level
;
403 /* future and to align */
405 } __attribute__ ((__packed__
));
408 * the super block basically lists the main trees of the FS
409 * it currently lacks any block count etc etc
411 struct btrfs_super_block
{
412 u8 csum
[BTRFS_CSUM_SIZE
];
413 /* the first 4 fields must match struct btrfs_header */
414 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
415 __le64 bytenr
; /* this block number */
418 /* allowed to be different from the btrfs_header from here own down */
425 /* this will help find the new super based on the log root */
426 __le64 log_root_transid
;
429 __le64 root_dir_objectid
;
435 __le32 sys_chunk_array_size
;
436 __le64 chunk_root_generation
;
438 __le64 compat_ro_flags
;
439 __le64 incompat_flags
;
444 struct btrfs_dev_item dev_item
;
446 char label
[BTRFS_LABEL_SIZE
];
448 __le64 cache_generation
;
450 /* future expansion */
452 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
453 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
454 } __attribute__ ((__packed__
));
457 * Compat flags that we support. If any incompat flags are set other than the
458 * ones specified below then we will fail to mount
460 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
461 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
462 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
463 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
465 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
466 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
467 #define BTRFS_FEATURE_INCOMPAT_SUPP \
468 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
469 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
470 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
471 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
474 * A leaf is full of items. offset and size tell us where to find
475 * the item in the leaf (relative to the start of the data area)
478 struct btrfs_disk_key key
;
481 } __attribute__ ((__packed__
));
484 * leaves have an item area and a data area:
485 * [item0, item1....itemN] [free space] [dataN...data1, data0]
487 * The data is separate from the items to get the keys closer together
491 struct btrfs_header header
;
492 struct btrfs_item items
[];
493 } __attribute__ ((__packed__
));
496 * all non-leaf blocks are nodes, they hold only keys and pointers to
499 struct btrfs_key_ptr
{
500 struct btrfs_disk_key key
;
503 } __attribute__ ((__packed__
));
506 struct btrfs_header header
;
507 struct btrfs_key_ptr ptrs
[];
508 } __attribute__ ((__packed__
));
511 * btrfs_paths remember the path taken from the root down to the leaf.
512 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
513 * to any other levels that are present.
515 * The slots array records the index of the item or block pointer
516 * used while walking the tree.
519 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
520 int slots
[BTRFS_MAX_LEVEL
];
521 /* if there is real range locking, this locks field will change */
522 int locks
[BTRFS_MAX_LEVEL
];
524 /* keep some upper locks as we walk down */
528 * set by btrfs_split_item, tells search_slot to keep all locks
529 * and to force calls to keep space in the nodes
531 unsigned int search_for_split
:1;
532 unsigned int keep_locks
:1;
533 unsigned int skip_locking
:1;
534 unsigned int leave_spinning
:1;
535 unsigned int search_commit_root
:1;
539 * items in the extent btree are used to record the objectid of the
540 * owner of the block and the number of references
543 struct btrfs_extent_item
{
547 } __attribute__ ((__packed__
));
549 struct btrfs_extent_item_v0
{
551 } __attribute__ ((__packed__
));
553 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
554 sizeof(struct btrfs_item))
556 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
557 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
559 /* following flags only apply to tree blocks */
561 /* use full backrefs for extent pointers in the block */
562 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
565 * this flag is only used internally by scrub and may be changed at any time
566 * it is only declared here to avoid collisions
568 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
570 struct btrfs_tree_block_info
{
571 struct btrfs_disk_key key
;
573 } __attribute__ ((__packed__
));
575 struct btrfs_extent_data_ref
{
580 } __attribute__ ((__packed__
));
582 struct btrfs_shared_data_ref
{
584 } __attribute__ ((__packed__
));
586 struct btrfs_extent_inline_ref
{
589 } __attribute__ ((__packed__
));
591 /* old style backrefs item */
592 struct btrfs_extent_ref_v0
{
597 } __attribute__ ((__packed__
));
600 /* dev extents record free space on individual devices. The owner
601 * field points back to the chunk allocation mapping tree that allocated
602 * the extent. The chunk tree uuid field is a way to double check the owner
604 struct btrfs_dev_extent
{
606 __le64 chunk_objectid
;
609 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
610 } __attribute__ ((__packed__
));
612 struct btrfs_inode_ref
{
616 } __attribute__ ((__packed__
));
618 struct btrfs_timespec
{
621 } __attribute__ ((__packed__
));
623 enum btrfs_compression_type
{
624 BTRFS_COMPRESS_NONE
= 0,
625 BTRFS_COMPRESS_ZLIB
= 1,
626 BTRFS_COMPRESS_LZO
= 2,
627 BTRFS_COMPRESS_TYPES
= 2,
628 BTRFS_COMPRESS_LAST
= 3,
631 struct btrfs_inode_item
{
632 /* nfs style generation number */
634 /* transid that last touched this inode */
646 /* modification sequence number for NFS */
650 * a little future expansion, for more than this we can
651 * just grow the inode item and version it
654 struct btrfs_timespec atime
;
655 struct btrfs_timespec ctime
;
656 struct btrfs_timespec mtime
;
657 struct btrfs_timespec otime
;
658 } __attribute__ ((__packed__
));
660 struct btrfs_dir_log_item
{
662 } __attribute__ ((__packed__
));
664 struct btrfs_dir_item
{
665 struct btrfs_disk_key location
;
670 } __attribute__ ((__packed__
));
672 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
674 struct btrfs_root_item
{
675 struct btrfs_inode_item inode
;
681 __le64 last_snapshot
;
684 struct btrfs_disk_key drop_progress
;
687 } __attribute__ ((__packed__
));
690 * this is used for both forward and backward root refs
692 struct btrfs_root_ref
{
696 } __attribute__ ((__packed__
));
698 struct btrfs_disk_balance_args
{
700 * profiles to operate on, single is denoted by
701 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
711 /* devid subset filter [pstart..pend) */
715 /* btrfs virtual address space subset filter [vstart..vend) */
720 * profile to convert to, single is denoted by
721 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
725 /* BTRFS_BALANCE_ARGS_* */
729 } __attribute__ ((__packed__
));
732 * store balance parameters to disk so that balance can be properly
733 * resumed after crash or unmount
735 struct btrfs_balance_item
{
736 /* BTRFS_BALANCE_* */
739 struct btrfs_disk_balance_args data
;
740 struct btrfs_disk_balance_args meta
;
741 struct btrfs_disk_balance_args sys
;
744 } __attribute__ ((__packed__
));
746 #define BTRFS_FILE_EXTENT_INLINE 0
747 #define BTRFS_FILE_EXTENT_REG 1
748 #define BTRFS_FILE_EXTENT_PREALLOC 2
750 struct btrfs_file_extent_item
{
752 * transaction id that created this extent
756 * max number of bytes to hold this extent in ram
757 * when we split a compressed extent we can't know how big
758 * each of the resulting pieces will be. So, this is
759 * an upper limit on the size of the extent in ram instead of
765 * 32 bits for the various ways we might encode the data,
766 * including compression and encryption. If any of these
767 * are set to something a given disk format doesn't understand
768 * it is treated like an incompat flag for reading and writing,
773 __le16 other_encoding
; /* spare for later use */
775 /* are we inline data or a real extent? */
779 * disk space consumed by the extent, checksum blocks are included
783 __le64 disk_num_bytes
;
785 * the logical offset in file blocks (no csums)
786 * this extent record is for. This allows a file extent to point
787 * into the middle of an existing extent on disk, sharing it
788 * between two snapshots (useful if some bytes in the middle of the
789 * extent have changed
793 * the logical number of file blocks (no csums included). This
794 * always reflects the size uncompressed and without encoding.
798 } __attribute__ ((__packed__
));
800 struct btrfs_csum_item
{
802 } __attribute__ ((__packed__
));
804 /* different types of block groups (and chunks) */
805 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
806 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
807 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
808 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
809 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
810 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
811 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
812 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
813 #define BTRFS_NR_RAID_TYPES 5
815 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
816 BTRFS_BLOCK_GROUP_SYSTEM | \
817 BTRFS_BLOCK_GROUP_METADATA)
819 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
820 BTRFS_BLOCK_GROUP_RAID1 | \
821 BTRFS_BLOCK_GROUP_DUP | \
822 BTRFS_BLOCK_GROUP_RAID10)
824 * We need a bit for restriper to be able to tell when chunks of type
825 * SINGLE are available. This "extended" profile format is used in
826 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
827 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
828 * to avoid remappings between two formats in future.
830 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
832 struct btrfs_block_group_item
{
834 __le64 chunk_objectid
;
836 } __attribute__ ((__packed__
));
838 struct btrfs_space_info
{
841 u64 total_bytes
; /* total bytes in the space,
842 this doesn't take mirrors into account */
843 u64 bytes_used
; /* total bytes used,
844 this doesn't take mirrors into account */
845 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
846 transaction finishes */
847 u64 bytes_reserved
; /* total bytes the allocator has reserved for
848 current allocations */
849 u64 bytes_readonly
; /* total bytes that are read only */
851 u64 bytes_may_use
; /* number of bytes that may be used for
852 delalloc/allocations */
853 u64 disk_used
; /* total bytes used on disk */
854 u64 disk_total
; /* total bytes on disk, takes mirrors into
858 * we bump reservation progress every time we decrement
859 * bytes_reserved. This way people waiting for reservations
860 * know something good has happened and they can check
861 * for progress. The number here isn't to be trusted, it
862 * just shows reclaim activity
864 unsigned long reservation_progress
;
866 unsigned int full
:1; /* indicates that we cannot allocate any more
867 chunks for this space */
868 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
870 unsigned int flush
:1; /* set if we are trying to make space */
872 unsigned int force_alloc
; /* set if we need to force a chunk
873 alloc for this space */
875 struct list_head list
;
877 /* for block groups in our same type */
878 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
880 struct rw_semaphore groups_sem
;
881 wait_queue_head_t wait
;
884 struct btrfs_block_rsv
{
887 struct btrfs_space_info
*space_info
;
893 * free clusters are used to claim free space in relatively large chunks,
894 * allowing us to do less seeky writes. They are used for all metadata
895 * allocations and data allocations in ssd mode.
897 struct btrfs_free_cluster
{
899 spinlock_t refill_lock
;
902 /* largest extent in this cluster */
905 /* first extent starting offset */
908 struct btrfs_block_group_cache
*block_group
;
910 * when a cluster is allocated from a block group, we put the
911 * cluster onto a list in the block group so that it can
912 * be freed before the block group is freed.
914 struct list_head block_group_list
;
917 enum btrfs_caching_type
{
919 BTRFS_CACHE_STARTED
= 1,
920 BTRFS_CACHE_FAST
= 2,
921 BTRFS_CACHE_FINISHED
= 3,
924 enum btrfs_disk_cache_state
{
925 BTRFS_DC_WRITTEN
= 0,
929 BTRFS_DC_NEED_WRITE
= 4,
932 struct btrfs_caching_control
{
933 struct list_head list
;
935 wait_queue_head_t wait
;
936 struct btrfs_work work
;
937 struct btrfs_block_group_cache
*block_group
;
942 struct btrfs_block_group_cache
{
943 struct btrfs_key key
;
944 struct btrfs_block_group_item item
;
945 struct btrfs_fs_info
*fs_info
;
953 u64 cache_generation
;
955 unsigned int dirty
:1;
958 int disk_cache_state
;
960 /* cache tracking stuff */
962 struct btrfs_caching_control
*caching_ctl
;
963 u64 last_byte_to_unpin
;
965 struct btrfs_space_info
*space_info
;
967 /* free space cache stuff */
968 struct btrfs_free_space_ctl
*free_space_ctl
;
970 /* block group cache stuff */
971 struct rb_node cache_node
;
973 /* for block groups in the same raid type */
974 struct list_head list
;
979 /* List of struct btrfs_free_clusters for this block group.
980 * Today it will only have one thing on it, but that may change
982 struct list_head cluster_list
;
985 struct reloc_control
;
987 struct btrfs_fs_devices
;
988 struct btrfs_balance_control
;
989 struct btrfs_delayed_root
;
990 struct btrfs_fs_info
{
991 u8 fsid
[BTRFS_FSID_SIZE
];
992 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
993 struct btrfs_root
*extent_root
;
994 struct btrfs_root
*tree_root
;
995 struct btrfs_root
*chunk_root
;
996 struct btrfs_root
*dev_root
;
997 struct btrfs_root
*fs_root
;
998 struct btrfs_root
*csum_root
;
1000 /* the log root tree is a directory of all the other log roots */
1001 struct btrfs_root
*log_root_tree
;
1003 spinlock_t fs_roots_radix_lock
;
1004 struct radix_tree_root fs_roots_radix
;
1006 /* block group cache stuff */
1007 spinlock_t block_group_cache_lock
;
1008 struct rb_root block_group_cache_tree
;
1010 /* keep track of unallocated space */
1011 spinlock_t free_chunk_lock
;
1012 u64 free_chunk_space
;
1014 struct extent_io_tree freed_extents
[2];
1015 struct extent_io_tree
*pinned_extents
;
1017 /* logical->physical extent mapping */
1018 struct btrfs_mapping_tree mapping_tree
;
1021 * block reservation for extent, checksum, root tree and
1022 * delayed dir index item
1024 struct btrfs_block_rsv global_block_rsv
;
1025 /* block reservation for delay allocation */
1026 struct btrfs_block_rsv delalloc_block_rsv
;
1027 /* block reservation for metadata operations */
1028 struct btrfs_block_rsv trans_block_rsv
;
1029 /* block reservation for chunk tree */
1030 struct btrfs_block_rsv chunk_block_rsv
;
1031 /* block reservation for delayed operations */
1032 struct btrfs_block_rsv delayed_block_rsv
;
1034 struct btrfs_block_rsv empty_block_rsv
;
1037 u64 last_trans_committed
;
1040 * this is updated to the current trans every time a full commit
1041 * is required instead of the faster short fsync log commits
1043 u64 last_trans_log_full_commit
;
1044 unsigned long mount_opt
:21;
1045 unsigned long compress_type
:4;
1048 struct btrfs_transaction
*running_transaction
;
1049 wait_queue_head_t transaction_throttle
;
1050 wait_queue_head_t transaction_wait
;
1051 wait_queue_head_t transaction_blocked_wait
;
1052 wait_queue_head_t async_submit_wait
;
1054 struct btrfs_super_block
*super_copy
;
1055 struct btrfs_super_block
*super_for_commit
;
1056 struct block_device
*__bdev
;
1057 struct super_block
*sb
;
1058 struct inode
*btree_inode
;
1059 struct backing_dev_info bdi
;
1060 struct mutex tree_log_mutex
;
1061 struct mutex transaction_kthread_mutex
;
1062 struct mutex cleaner_mutex
;
1063 struct mutex chunk_mutex
;
1064 struct mutex volume_mutex
;
1066 * this protects the ordered operations list only while we are
1067 * processing all of the entries on it. This way we make
1068 * sure the commit code doesn't find the list temporarily empty
1069 * because another function happens to be doing non-waiting preflush
1070 * before jumping into the main commit.
1072 struct mutex ordered_operations_mutex
;
1073 struct rw_semaphore extent_commit_sem
;
1075 struct rw_semaphore cleanup_work_sem
;
1077 struct rw_semaphore subvol_sem
;
1078 struct srcu_struct subvol_srcu
;
1080 spinlock_t trans_lock
;
1082 * the reloc mutex goes with the trans lock, it is taken
1083 * during commit to protect us from the relocation code
1085 struct mutex reloc_mutex
;
1087 struct list_head trans_list
;
1088 struct list_head hashers
;
1089 struct list_head dead_roots
;
1090 struct list_head caching_block_groups
;
1092 spinlock_t delayed_iput_lock
;
1093 struct list_head delayed_iputs
;
1095 atomic_t nr_async_submits
;
1096 atomic_t async_submit_draining
;
1097 atomic_t nr_async_bios
;
1098 atomic_t async_delalloc_pages
;
1099 atomic_t open_ioctl_trans
;
1102 * this is used by the balancing code to wait for all the pending
1105 spinlock_t ordered_extent_lock
;
1108 * all of the data=ordered extents pending writeback
1109 * these can span multiple transactions and basically include
1110 * every dirty data page that isn't from nodatacow
1112 struct list_head ordered_extents
;
1115 * all of the inodes that have delalloc bytes. It is possible for
1116 * this list to be empty even when there is still dirty data=ordered
1117 * extents waiting to finish IO.
1119 struct list_head delalloc_inodes
;
1122 * special rename and truncate targets that must be on disk before
1123 * we're allowed to commit. This is basically the ext3 style
1124 * data=ordered list.
1126 struct list_head ordered_operations
;
1129 * there is a pool of worker threads for checksumming during writes
1130 * and a pool for checksumming after reads. This is because readers
1131 * can run with FS locks held, and the writers may be waiting for
1132 * those locks. We don't want ordering in the pending list to cause
1133 * deadlocks, and so the two are serviced separately.
1135 * A third pool does submit_bio to avoid deadlocking with the other
1138 struct btrfs_workers generic_worker
;
1139 struct btrfs_workers workers
;
1140 struct btrfs_workers delalloc_workers
;
1141 struct btrfs_workers endio_workers
;
1142 struct btrfs_workers endio_meta_workers
;
1143 struct btrfs_workers endio_meta_write_workers
;
1144 struct btrfs_workers endio_write_workers
;
1145 struct btrfs_workers endio_freespace_worker
;
1146 struct btrfs_workers submit_workers
;
1147 struct btrfs_workers caching_workers
;
1148 struct btrfs_workers readahead_workers
;
1151 * fixup workers take dirty pages that didn't properly go through
1152 * the cow mechanism and make them safe to write. It happens
1153 * for the sys_munmap function call path
1155 struct btrfs_workers fixup_workers
;
1156 struct btrfs_workers delayed_workers
;
1157 struct task_struct
*transaction_kthread
;
1158 struct task_struct
*cleaner_kthread
;
1159 int thread_pool_size
;
1161 struct kobject super_kobj
;
1162 struct completion kobj_unregister
;
1165 int log_root_recovering
;
1171 /* protected by the delalloc lock, used to keep from writing
1172 * metadata until there is a nice batch
1174 u64 dirty_metadata_bytes
;
1175 struct list_head dirty_cowonly_roots
;
1177 struct btrfs_fs_devices
*fs_devices
;
1180 * the space_info list is almost entirely read only. It only changes
1181 * when we add a new raid type to the FS, and that happens
1182 * very rarely. RCU is used to protect it.
1184 struct list_head space_info
;
1186 struct reloc_control
*reloc_ctl
;
1188 spinlock_t delalloc_lock
;
1191 /* data_alloc_cluster is only used in ssd mode */
1192 struct btrfs_free_cluster data_alloc_cluster
;
1194 /* all metadata allocations go through this cluster */
1195 struct btrfs_free_cluster meta_alloc_cluster
;
1197 /* auto defrag inodes go here */
1198 spinlock_t defrag_inodes_lock
;
1199 struct rb_root defrag_inodes
;
1200 atomic_t defrag_running
;
1202 spinlock_t ref_cache_lock
;
1203 u64 total_ref_cache_size
;
1206 * these three are in extended format (availability of single
1207 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1208 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1210 u64 avail_data_alloc_bits
;
1211 u64 avail_metadata_alloc_bits
;
1212 u64 avail_system_alloc_bits
;
1214 /* restriper state */
1215 spinlock_t balance_lock
;
1216 struct mutex balance_mutex
;
1217 atomic_t balance_running
;
1218 atomic_t balance_pause_req
;
1219 atomic_t balance_cancel_req
;
1220 struct btrfs_balance_control
*balance_ctl
;
1221 wait_queue_head_t balance_wait_q
;
1223 unsigned data_chunk_allocations
;
1224 unsigned metadata_ratio
;
1228 /* private scrub information */
1229 struct mutex scrub_lock
;
1230 atomic_t scrubs_running
;
1231 atomic_t scrub_pause_req
;
1232 atomic_t scrubs_paused
;
1233 atomic_t scrub_cancel_req
;
1234 wait_queue_head_t scrub_pause_wait
;
1235 struct rw_semaphore scrub_super_lock
;
1236 int scrub_workers_refcnt
;
1237 struct btrfs_workers scrub_workers
;
1239 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1240 u32 check_integrity_print_mask
;
1243 /* filesystem state */
1246 struct btrfs_delayed_root
*delayed_root
;
1248 /* readahead tree */
1249 spinlock_t reada_lock
;
1250 struct radix_tree_root reada_tree
;
1252 /* next backup root to be overwritten */
1253 int backup_root_index
;
1257 * in ram representation of the tree. extent_root is used for all allocations
1258 * and for the extent tree extent_root root.
1261 struct extent_buffer
*node
;
1263 struct extent_buffer
*commit_root
;
1264 struct btrfs_root
*log_root
;
1265 struct btrfs_root
*reloc_root
;
1267 struct btrfs_root_item root_item
;
1268 struct btrfs_key root_key
;
1269 struct btrfs_fs_info
*fs_info
;
1270 struct extent_io_tree dirty_log_pages
;
1272 struct kobject root_kobj
;
1273 struct completion kobj_unregister
;
1274 struct mutex objectid_mutex
;
1276 spinlock_t accounting_lock
;
1277 struct btrfs_block_rsv
*block_rsv
;
1279 /* free ino cache stuff */
1280 struct mutex fs_commit_mutex
;
1281 struct btrfs_free_space_ctl
*free_ino_ctl
;
1282 enum btrfs_caching_type cached
;
1283 spinlock_t cache_lock
;
1284 wait_queue_head_t cache_wait
;
1285 struct btrfs_free_space_ctl
*free_ino_pinned
;
1287 struct inode
*cache_inode
;
1289 struct mutex log_mutex
;
1290 wait_queue_head_t log_writer_wait
;
1291 wait_queue_head_t log_commit_wait
[2];
1292 atomic_t log_writers
;
1293 atomic_t log_commit
[2];
1294 unsigned long log_transid
;
1295 unsigned long last_log_commit
;
1296 unsigned long log_batch
;
1297 pid_t log_start_pid
;
1298 bool log_multiple_pids
;
1303 /* data allocations are done in sectorsize units */
1306 /* node allocations are done in nodesize units */
1309 /* leaf allocations are done in leafsize units */
1316 u64 highest_objectid
;
1318 /* btrfs_record_root_in_trans is a multi-step process,
1319 * and it can race with the balancing code. But the
1320 * race is very small, and only the first time the root
1321 * is added to each transaction. So in_trans_setup
1322 * is used to tell us when more checks are required
1324 unsigned long in_trans_setup
;
1329 u64 defrag_trans_start
;
1330 struct btrfs_key defrag_progress
;
1331 struct btrfs_key defrag_max
;
1335 /* the dirty list is only used by non-reference counted roots */
1336 struct list_head dirty_list
;
1338 struct list_head root_list
;
1340 spinlock_t orphan_lock
;
1341 struct list_head orphan_list
;
1342 struct btrfs_block_rsv
*orphan_block_rsv
;
1343 int orphan_item_inserted
;
1344 int orphan_cleanup_state
;
1346 spinlock_t inode_lock
;
1347 /* red-black tree that keeps track of in-memory inodes */
1348 struct rb_root inode_tree
;
1351 * radix tree that keeps track of delayed nodes of every inode,
1352 * protected by inode_lock
1354 struct radix_tree_root delayed_nodes_tree
;
1356 * right now this just gets used so that a root has its own devid
1357 * for stat. It may be used for more later
1364 struct btrfs_ioctl_defrag_range_args
{
1365 /* start of the defrag operation */
1368 /* number of bytes to defrag, use (u64)-1 to say all */
1372 * flags for the operation, which can include turning
1373 * on compression for this one defrag
1378 * any extent bigger than this will be considered
1379 * already defragged. Use 0 to take the kernel default
1380 * Use 1 to say every single extent must be rewritten
1382 __u32 extent_thresh
;
1385 * which compression method to use if turning on compression
1386 * for this defrag operation. If unspecified, zlib will
1389 __u32 compress_type
;
1391 /* spare for later */
1397 * inode items have the data typically returned from stat and store other
1398 * info about object characteristics. There is one for every file and dir in
1401 #define BTRFS_INODE_ITEM_KEY 1
1402 #define BTRFS_INODE_REF_KEY 12
1403 #define BTRFS_XATTR_ITEM_KEY 24
1404 #define BTRFS_ORPHAN_ITEM_KEY 48
1405 /* reserve 2-15 close to the inode for later flexibility */
1408 * dir items are the name -> inode pointers in a directory. There is one
1409 * for every name in a directory.
1411 #define BTRFS_DIR_LOG_ITEM_KEY 60
1412 #define BTRFS_DIR_LOG_INDEX_KEY 72
1413 #define BTRFS_DIR_ITEM_KEY 84
1414 #define BTRFS_DIR_INDEX_KEY 96
1416 * extent data is for file data
1418 #define BTRFS_EXTENT_DATA_KEY 108
1421 * extent csums are stored in a separate tree and hold csums for
1422 * an entire extent on disk.
1424 #define BTRFS_EXTENT_CSUM_KEY 128
1427 * root items point to tree roots. They are typically in the root
1428 * tree used by the super block to find all the other trees
1430 #define BTRFS_ROOT_ITEM_KEY 132
1433 * root backrefs tie subvols and snapshots to the directory entries that
1436 #define BTRFS_ROOT_BACKREF_KEY 144
1439 * root refs make a fast index for listing all of the snapshots and
1440 * subvolumes referenced by a given root. They point directly to the
1441 * directory item in the root that references the subvol
1443 #define BTRFS_ROOT_REF_KEY 156
1446 * extent items are in the extent map tree. These record which blocks
1447 * are used, and how many references there are to each block
1449 #define BTRFS_EXTENT_ITEM_KEY 168
1451 #define BTRFS_TREE_BLOCK_REF_KEY 176
1453 #define BTRFS_EXTENT_DATA_REF_KEY 178
1455 #define BTRFS_EXTENT_REF_V0_KEY 180
1457 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1459 #define BTRFS_SHARED_DATA_REF_KEY 184
1462 * block groups give us hints into the extent allocation trees. Which
1463 * blocks are free etc etc
1465 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1467 #define BTRFS_DEV_EXTENT_KEY 204
1468 #define BTRFS_DEV_ITEM_KEY 216
1469 #define BTRFS_CHUNK_ITEM_KEY 228
1471 #define BTRFS_BALANCE_ITEM_KEY 248
1474 * string items are for debugging. They just store a short string of
1477 #define BTRFS_STRING_ITEM_KEY 253
1480 * Flags for mount options.
1482 * Note: don't forget to add new options to btrfs_show_options()
1484 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1485 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1486 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1487 #define BTRFS_MOUNT_SSD (1 << 3)
1488 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1489 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1490 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1491 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1492 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1493 #define BTRFS_MOUNT_NOSSD (1 << 9)
1494 #define BTRFS_MOUNT_DISCARD (1 << 10)
1495 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1496 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1497 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1498 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1499 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1500 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1501 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1502 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1503 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1504 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1505 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1506 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1508 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1509 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1510 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1515 #define BTRFS_INODE_NODATASUM (1 << 0)
1516 #define BTRFS_INODE_NODATACOW (1 << 1)
1517 #define BTRFS_INODE_READONLY (1 << 2)
1518 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1519 #define BTRFS_INODE_PREALLOC (1 << 4)
1520 #define BTRFS_INODE_SYNC (1 << 5)
1521 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1522 #define BTRFS_INODE_APPEND (1 << 7)
1523 #define BTRFS_INODE_NODUMP (1 << 8)
1524 #define BTRFS_INODE_NOATIME (1 << 9)
1525 #define BTRFS_INODE_DIRSYNC (1 << 10)
1526 #define BTRFS_INODE_COMPRESS (1 << 11)
1528 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1530 /* some macros to generate set/get funcs for the struct fields. This
1531 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1534 #define le8_to_cpu(v) (v)
1535 #define cpu_to_le8(v) (v)
1538 #define read_eb_member(eb, ptr, type, member, result) ( \
1539 read_extent_buffer(eb, (char *)(result), \
1540 ((unsigned long)(ptr)) + \
1541 offsetof(type, member), \
1542 sizeof(((type *)0)->member)))
1544 #define write_eb_member(eb, ptr, type, member, result) ( \
1545 write_extent_buffer(eb, (char *)(result), \
1546 ((unsigned long)(ptr)) + \
1547 offsetof(type, member), \
1548 sizeof(((type *)0)->member)))
1550 #ifndef BTRFS_SETGET_FUNCS
1551 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1552 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1553 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1556 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1557 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1559 type *p = page_address(eb->first_page); \
1560 u##bits res = le##bits##_to_cpu(p->member); \
1563 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1566 type *p = page_address(eb->first_page); \
1567 p->member = cpu_to_le##bits(val); \
1570 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1571 static inline u##bits btrfs_##name(type *s) \
1573 return le##bits##_to_cpu(s->member); \
1575 static inline void btrfs_set_##name(type *s, u##bits val) \
1577 s->member = cpu_to_le##bits(val); \
1580 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1581 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1582 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1583 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1584 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1585 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1587 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1588 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1589 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1590 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1591 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1592 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1594 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1595 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1597 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1599 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1601 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1603 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1605 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1606 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1608 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1610 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1612 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1615 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1617 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1620 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1622 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1625 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1626 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1627 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1628 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1629 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1630 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1631 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1632 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1633 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1634 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1635 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1637 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1639 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1642 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1643 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1644 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1646 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1648 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1650 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1652 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1653 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1655 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1657 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1658 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1660 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1663 unsigned long offset
= (unsigned long)c
;
1664 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1665 offset
+= nr
* sizeof(struct btrfs_stripe
);
1666 return (struct btrfs_stripe
*)offset
;
1669 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1671 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1674 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1675 struct btrfs_chunk
*c
, int nr
)
1677 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1680 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1681 struct btrfs_chunk
*c
, int nr
)
1683 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1686 /* struct btrfs_block_group_item */
1687 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1689 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1691 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1692 struct btrfs_block_group_item
, chunk_objectid
, 64);
1694 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1695 struct btrfs_block_group_item
, chunk_objectid
, 64);
1696 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1697 struct btrfs_block_group_item
, flags
, 64);
1698 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1699 struct btrfs_block_group_item
, flags
, 64);
1701 /* struct btrfs_inode_ref */
1702 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1703 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1705 /* struct btrfs_inode_item */
1706 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1707 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1708 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1709 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1710 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1711 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1712 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1713 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1714 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1715 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1716 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1717 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1719 static inline struct btrfs_timespec
*
1720 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1722 unsigned long ptr
= (unsigned long)inode_item
;
1723 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1724 return (struct btrfs_timespec
*)ptr
;
1727 static inline struct btrfs_timespec
*
1728 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1730 unsigned long ptr
= (unsigned long)inode_item
;
1731 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1732 return (struct btrfs_timespec
*)ptr
;
1735 static inline struct btrfs_timespec
*
1736 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1738 unsigned long ptr
= (unsigned long)inode_item
;
1739 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1740 return (struct btrfs_timespec
*)ptr
;
1743 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1744 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1746 /* struct btrfs_dev_extent */
1747 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1749 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1750 chunk_objectid
, 64);
1751 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1753 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1755 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1757 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1758 return (u8
*)((unsigned long)dev
+ ptr
);
1761 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1762 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1764 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1766 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1769 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1771 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1772 struct btrfs_tree_block_info
*item
,
1773 struct btrfs_disk_key
*key
)
1775 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1778 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1779 struct btrfs_tree_block_info
*item
,
1780 struct btrfs_disk_key
*key
)
1782 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1785 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1787 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1789 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1791 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1794 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1797 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1799 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1802 static inline u32
btrfs_extent_inline_ref_size(int type
)
1804 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1805 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1806 return sizeof(struct btrfs_extent_inline_ref
);
1807 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1808 return sizeof(struct btrfs_shared_data_ref
) +
1809 sizeof(struct btrfs_extent_inline_ref
);
1810 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1811 return sizeof(struct btrfs_extent_data_ref
) +
1812 offsetof(struct btrfs_extent_inline_ref
, offset
);
1817 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1818 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1820 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1821 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1823 /* struct btrfs_node */
1824 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1825 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1827 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1830 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1831 sizeof(struct btrfs_key_ptr
) * nr
;
1832 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1835 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1839 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1840 sizeof(struct btrfs_key_ptr
) * nr
;
1841 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1844 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1847 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1848 sizeof(struct btrfs_key_ptr
) * nr
;
1849 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1852 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1856 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1857 sizeof(struct btrfs_key_ptr
) * nr
;
1858 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1861 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1863 return offsetof(struct btrfs_node
, ptrs
) +
1864 sizeof(struct btrfs_key_ptr
) * nr
;
1867 void btrfs_node_key(struct extent_buffer
*eb
,
1868 struct btrfs_disk_key
*disk_key
, int nr
);
1870 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1871 struct btrfs_disk_key
*disk_key
, int nr
)
1874 ptr
= btrfs_node_key_ptr_offset(nr
);
1875 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1876 struct btrfs_key_ptr
, key
, disk_key
);
1879 /* struct btrfs_item */
1880 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1881 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1883 static inline unsigned long btrfs_item_nr_offset(int nr
)
1885 return offsetof(struct btrfs_leaf
, items
) +
1886 sizeof(struct btrfs_item
) * nr
;
1889 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1892 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1895 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1896 struct btrfs_item
*item
)
1898 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1901 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1903 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1906 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1908 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1911 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1913 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1916 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1917 struct btrfs_disk_key
*disk_key
, int nr
)
1919 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1920 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1923 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1924 struct btrfs_disk_key
*disk_key
, int nr
)
1926 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1927 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1930 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1933 * struct btrfs_root_ref
1935 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1936 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1937 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1939 /* struct btrfs_dir_item */
1940 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1941 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1942 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1943 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1945 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1946 struct btrfs_dir_item
*item
,
1947 struct btrfs_disk_key
*key
)
1949 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1952 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1953 struct btrfs_dir_item
*item
,
1954 struct btrfs_disk_key
*key
)
1956 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1959 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1961 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1963 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1966 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1967 struct btrfs_free_space_header
*h
,
1968 struct btrfs_disk_key
*key
)
1970 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1973 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1974 struct btrfs_free_space_header
*h
,
1975 struct btrfs_disk_key
*key
)
1977 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1980 /* struct btrfs_disk_key */
1981 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1983 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1984 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1986 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1987 struct btrfs_disk_key
*disk
)
1989 cpu
->offset
= le64_to_cpu(disk
->offset
);
1990 cpu
->type
= disk
->type
;
1991 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1994 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1995 struct btrfs_key
*cpu
)
1997 disk
->offset
= cpu_to_le64(cpu
->offset
);
1998 disk
->type
= cpu
->type
;
1999 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2002 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2003 struct btrfs_key
*key
, int nr
)
2005 struct btrfs_disk_key disk_key
;
2006 btrfs_node_key(eb
, &disk_key
, nr
);
2007 btrfs_disk_key_to_cpu(key
, &disk_key
);
2010 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2011 struct btrfs_key
*key
, int nr
)
2013 struct btrfs_disk_key disk_key
;
2014 btrfs_item_key(eb
, &disk_key
, nr
);
2015 btrfs_disk_key_to_cpu(key
, &disk_key
);
2018 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2019 struct btrfs_dir_item
*item
,
2020 struct btrfs_key
*key
)
2022 struct btrfs_disk_key disk_key
;
2023 btrfs_dir_item_key(eb
, item
, &disk_key
);
2024 btrfs_disk_key_to_cpu(key
, &disk_key
);
2028 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2033 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2038 /* struct btrfs_header */
2039 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2040 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2042 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2043 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2044 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2045 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2047 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2049 return (btrfs_header_flags(eb
) & flag
) == flag
;
2052 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2054 u64 flags
= btrfs_header_flags(eb
);
2055 btrfs_set_header_flags(eb
, flags
| flag
);
2056 return (flags
& flag
) == flag
;
2059 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2061 u64 flags
= btrfs_header_flags(eb
);
2062 btrfs_set_header_flags(eb
, flags
& ~flag
);
2063 return (flags
& flag
) == flag
;
2066 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2068 u64 flags
= btrfs_header_flags(eb
);
2069 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2072 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2075 u64 flags
= btrfs_header_flags(eb
);
2076 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2077 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2078 btrfs_set_header_flags(eb
, flags
);
2081 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
2083 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
2087 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2089 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
2093 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2095 return btrfs_header_level(eb
) == 0;
2098 /* struct btrfs_root_item */
2099 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2101 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2102 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2103 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2105 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2107 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2108 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2109 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2110 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2111 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2112 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2113 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2114 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2117 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2119 return root
->root_item
.flags
& BTRFS_ROOT_SUBVOL_RDONLY
;
2122 /* struct btrfs_root_backup */
2123 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2125 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2127 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2128 tree_root_level
, 8);
2130 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2132 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2133 chunk_root_gen
, 64);
2134 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2135 chunk_root_level
, 8);
2137 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2139 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2140 extent_root_gen
, 64);
2141 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2142 extent_root_level
, 8);
2144 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2146 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2148 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2151 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2153 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2155 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2158 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2160 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2162 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2163 csum_root_level
, 8);
2164 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2166 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2168 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2171 /* struct btrfs_balance_item */
2172 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2174 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2175 struct btrfs_balance_item
*bi
,
2176 struct btrfs_disk_balance_args
*ba
)
2178 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2181 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2182 struct btrfs_balance_item
*bi
,
2183 struct btrfs_disk_balance_args
*ba
)
2185 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2188 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2189 struct btrfs_balance_item
*bi
,
2190 struct btrfs_disk_balance_args
*ba
)
2192 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2195 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2196 struct btrfs_balance_item
*bi
,
2197 struct btrfs_disk_balance_args
*ba
)
2199 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2202 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2203 struct btrfs_balance_item
*bi
,
2204 struct btrfs_disk_balance_args
*ba
)
2206 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2209 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2210 struct btrfs_balance_item
*bi
,
2211 struct btrfs_disk_balance_args
*ba
)
2213 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2217 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2218 struct btrfs_disk_balance_args
*disk
)
2220 memset(cpu
, 0, sizeof(*cpu
));
2222 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2223 cpu
->usage
= le64_to_cpu(disk
->usage
);
2224 cpu
->devid
= le64_to_cpu(disk
->devid
);
2225 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2226 cpu
->pend
= le64_to_cpu(disk
->pend
);
2227 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2228 cpu
->vend
= le64_to_cpu(disk
->vend
);
2229 cpu
->target
= le64_to_cpu(disk
->target
);
2230 cpu
->flags
= le64_to_cpu(disk
->flags
);
2234 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2235 struct btrfs_balance_args
*cpu
)
2237 memset(disk
, 0, sizeof(*disk
));
2239 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2240 disk
->usage
= cpu_to_le64(cpu
->usage
);
2241 disk
->devid
= cpu_to_le64(cpu
->devid
);
2242 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2243 disk
->pend
= cpu_to_le64(cpu
->pend
);
2244 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2245 disk
->vend
= cpu_to_le64(cpu
->vend
);
2246 disk
->target
= cpu_to_le64(cpu
->target
);
2247 disk
->flags
= cpu_to_le64(cpu
->flags
);
2250 /* struct btrfs_super_block */
2251 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2252 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2253 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2255 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2256 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2257 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2258 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2259 struct btrfs_super_block
, chunk_root_generation
, 64);
2260 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2262 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2264 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2265 chunk_root_level
, 8);
2266 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2268 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2269 log_root_transid
, 64);
2270 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2272 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2274 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2276 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2278 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2280 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2282 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2284 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2285 root_dir_objectid
, 64);
2286 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2288 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2290 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2291 compat_ro_flags
, 64);
2292 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2293 incompat_flags
, 64);
2294 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2296 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2297 cache_generation
, 64);
2299 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2301 int t
= btrfs_super_csum_type(s
);
2302 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2303 return btrfs_csum_sizes
[t
];
2306 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2308 return offsetof(struct btrfs_leaf
, items
);
2311 /* struct btrfs_file_extent_item */
2312 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2314 static inline unsigned long
2315 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2317 unsigned long offset
= (unsigned long)e
;
2318 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2322 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2324 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2327 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2329 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2331 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2332 disk_num_bytes
, 64);
2333 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2335 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2337 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2339 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2341 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2343 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2344 other_encoding
, 16);
2346 /* this returns the number of file bytes represented by the inline item.
2347 * If an item is compressed, this is the uncompressed size
2349 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2350 struct btrfs_file_extent_item
*e
)
2352 return btrfs_file_extent_ram_bytes(eb
, e
);
2356 * this returns the number of bytes used by the item on disk, minus the
2357 * size of any extent headers. If a file is compressed on disk, this is
2358 * the compressed size
2360 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2361 struct btrfs_item
*e
)
2363 unsigned long offset
;
2364 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2365 return btrfs_item_size(eb
, e
) - offset
;
2368 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
2370 return sb
->s_fs_info
;
2373 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2376 return root
->leafsize
;
2377 return root
->nodesize
;
2380 /* helper function to cast into the data area of the leaf. */
2381 #define btrfs_item_ptr(leaf, slot, type) \
2382 ((type *)(btrfs_leaf_data(leaf) + \
2383 btrfs_item_offset_nr(leaf, slot)))
2385 #define btrfs_item_ptr_offset(leaf, slot) \
2386 ((unsigned long)(btrfs_leaf_data(leaf) + \
2387 btrfs_item_offset_nr(leaf, slot)))
2389 static inline struct dentry
*fdentry(struct file
*file
)
2391 return file
->f_path
.dentry
;
2394 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2396 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2397 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2400 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2402 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
2406 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2409 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2414 * Doing a truncate won't result in new nodes or leaves, just what we need for
2417 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2420 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2424 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2425 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2426 struct btrfs_root
*root
, unsigned long count
);
2427 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2428 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2429 struct btrfs_root
*root
, u64 bytenr
,
2430 u64 num_bytes
, u64
*refs
, u64
*flags
);
2431 int btrfs_pin_extent(struct btrfs_root
*root
,
2432 u64 bytenr
, u64 num
, int reserved
);
2433 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle
*trans
,
2434 struct btrfs_root
*root
,
2435 u64 bytenr
, u64 num_bytes
);
2436 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2437 struct btrfs_root
*root
,
2438 u64 objectid
, u64 offset
, u64 bytenr
);
2439 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2440 struct btrfs_fs_info
*info
,
2442 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2443 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2444 u64 search_start
, u64 search_hint
, int owner
);
2445 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2446 struct btrfs_root
*root
, u32 blocksize
,
2447 u64 parent
, u64 root_objectid
,
2448 struct btrfs_disk_key
*key
, int level
,
2449 u64 hint
, u64 empty_size
, int for_cow
);
2450 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2451 struct btrfs_root
*root
,
2452 struct extent_buffer
*buf
,
2453 u64 parent
, int last_ref
, int for_cow
);
2454 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2455 struct btrfs_root
*root
,
2456 u64 bytenr
, u32 blocksize
,
2458 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2459 struct btrfs_root
*root
,
2460 u64 root_objectid
, u64 owner
,
2461 u64 offset
, struct btrfs_key
*ins
);
2462 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2463 struct btrfs_root
*root
,
2464 u64 root_objectid
, u64 owner
, u64 offset
,
2465 struct btrfs_key
*ins
);
2466 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2467 struct btrfs_root
*root
,
2468 u64 num_bytes
, u64 min_alloc_size
,
2469 u64 empty_size
, u64 hint_byte
,
2470 u64 search_end
, struct btrfs_key
*ins
,
2472 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2473 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
2474 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2475 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
2476 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2477 struct btrfs_root
*root
,
2478 u64 bytenr
, u64 num_bytes
, u64 flags
,
2480 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2481 struct btrfs_root
*root
,
2482 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
2483 u64 owner
, u64 offset
, int for_cow
);
2485 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2486 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
2487 u64 start
, u64 len
);
2488 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2489 struct btrfs_root
*root
);
2490 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2491 struct btrfs_root
*root
);
2492 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2493 struct btrfs_root
*root
,
2494 u64 bytenr
, u64 num_bytes
, u64 parent
,
2495 u64 root_objectid
, u64 owner
, u64 offset
, int for_cow
);
2497 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2498 struct btrfs_root
*root
);
2499 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2500 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2501 int btrfs_read_block_groups(struct btrfs_root
*root
);
2502 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2503 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2504 struct btrfs_root
*root
, u64 bytes_used
,
2505 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2507 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2508 struct btrfs_root
*root
, u64 group_start
);
2509 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2510 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2511 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2512 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2513 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
2514 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
2515 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2516 struct btrfs_root
*root
);
2517 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2518 struct inode
*inode
);
2519 void btrfs_orphan_release_metadata(struct inode
*inode
);
2520 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
2521 struct btrfs_pending_snapshot
*pending
);
2522 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2523 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2524 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
2525 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
2526 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2527 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2528 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2529 struct btrfs_block_rsv
*rsv
);
2530 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2531 struct btrfs_block_rsv
*block_rsv
,
2533 int btrfs_block_rsv_add_noflush(struct btrfs_root
*root
,
2534 struct btrfs_block_rsv
*block_rsv
,
2536 int btrfs_block_rsv_check(struct btrfs_root
*root
,
2537 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2538 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2539 struct btrfs_block_rsv
*block_rsv
,
2541 int btrfs_block_rsv_refill_noflush(struct btrfs_root
*root
,
2542 struct btrfs_block_rsv
*block_rsv
,
2544 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2545 struct btrfs_block_rsv
*dst_rsv
,
2547 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2548 struct btrfs_block_rsv
*block_rsv
,
2550 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2551 struct btrfs_block_group_cache
*cache
);
2552 void btrfs_set_block_group_rw(struct btrfs_root
*root
,
2553 struct btrfs_block_group_cache
*cache
);
2554 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2555 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2556 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2557 u64 start
, u64 end
);
2558 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2559 u64 num_bytes
, u64
*actual_bytes
);
2560 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2561 struct btrfs_root
*root
, u64 type
);
2562 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
2564 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2566 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2567 int level
, int *slot
);
2568 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2569 int btrfs_previous_item(struct btrfs_root
*root
,
2570 struct btrfs_path
*path
, u64 min_objectid
,
2572 void btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2573 struct btrfs_root
*root
, struct btrfs_path
*path
,
2574 struct btrfs_key
*new_key
);
2575 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2576 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2577 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2578 struct btrfs_key
*key
, int lowest_level
,
2579 int cache_only
, u64 min_trans
);
2580 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2581 struct btrfs_key
*max_key
,
2582 struct btrfs_path
*path
, int cache_only
,
2584 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2585 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2586 struct extent_buffer
*parent
, int parent_slot
,
2587 struct extent_buffer
**cow_ret
);
2588 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2589 struct btrfs_root
*root
,
2590 struct extent_buffer
*buf
,
2591 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2592 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2593 struct extent_buffer
*buf
);
2594 void btrfs_extend_item(struct btrfs_trans_handle
*trans
,
2595 struct btrfs_root
*root
, struct btrfs_path
*path
,
2597 void btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2598 struct btrfs_root
*root
,
2599 struct btrfs_path
*path
,
2600 u32 new_size
, int from_end
);
2601 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2602 struct btrfs_root
*root
,
2603 struct btrfs_path
*path
,
2604 struct btrfs_key
*new_key
,
2605 unsigned long split_offset
);
2606 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2607 struct btrfs_root
*root
,
2608 struct btrfs_path
*path
,
2609 struct btrfs_key
*new_key
);
2610 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2611 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2613 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2614 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2615 int start_slot
, int cache_only
, u64
*last_ret
,
2616 struct btrfs_key
*progress
);
2617 void btrfs_release_path(struct btrfs_path
*p
);
2618 struct btrfs_path
*btrfs_alloc_path(void);
2619 void btrfs_free_path(struct btrfs_path
*p
);
2620 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2621 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2622 struct extent_buffer
*held
, int held_rw
);
2623 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2625 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2626 struct btrfs_path
*path
, int slot
, int nr
);
2627 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2628 struct btrfs_root
*root
,
2629 struct btrfs_path
*path
)
2631 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2634 void setup_items_for_insert(struct btrfs_trans_handle
*trans
,
2635 struct btrfs_root
*root
, struct btrfs_path
*path
,
2636 struct btrfs_key
*cpu_key
, u32
*data_size
,
2637 u32 total_data
, u32 total_size
, int nr
);
2638 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2639 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2640 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2641 struct btrfs_root
*root
,
2642 struct btrfs_path
*path
,
2643 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2645 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2646 struct btrfs_root
*root
,
2647 struct btrfs_path
*path
,
2648 struct btrfs_key
*key
,
2651 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2654 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2655 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
2658 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2659 return btrfs_next_leaf(root
, p
);
2662 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2663 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2664 void btrfs_drop_snapshot(struct btrfs_root
*root
,
2665 struct btrfs_block_rsv
*block_rsv
, int update_ref
,
2667 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2668 struct btrfs_root
*root
,
2669 struct extent_buffer
*node
,
2670 struct extent_buffer
*parent
);
2671 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2674 * Get synced with close_ctree()
2677 return fs_info
->closing
;
2679 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
2681 kfree(fs_info
->balance_ctl
);
2682 kfree(fs_info
->delayed_root
);
2683 kfree(fs_info
->extent_root
);
2684 kfree(fs_info
->tree_root
);
2685 kfree(fs_info
->chunk_root
);
2686 kfree(fs_info
->dev_root
);
2687 kfree(fs_info
->csum_root
);
2688 kfree(fs_info
->super_copy
);
2689 kfree(fs_info
->super_for_commit
);
2693 * profile_is_valid - tests whether a given profile is valid and reduced
2694 * @flags: profile to validate
2695 * @extended: if true @flags is treated as an extended profile
2697 static inline int profile_is_valid(u64 flags
, int extended
)
2699 u64 mask
= ~BTRFS_BLOCK_GROUP_PROFILE_MASK
;
2701 flags
&= ~BTRFS_BLOCK_GROUP_TYPE_MASK
;
2703 mask
&= ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
2707 /* true if zero or exactly one bit set */
2708 return (flags
& (~flags
+ 1)) == flags
;
2712 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2713 struct btrfs_path
*path
,
2714 u64 root_id
, u64 ref_id
);
2715 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2716 struct btrfs_root
*tree_root
,
2717 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2718 const char *name
, int name_len
);
2719 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2720 struct btrfs_root
*tree_root
,
2721 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2722 const char *name
, int name_len
);
2723 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2724 struct btrfs_key
*key
);
2725 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2726 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2728 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
2729 struct btrfs_root
*root
,
2730 struct btrfs_key
*key
,
2731 struct btrfs_root_item
*item
);
2732 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2733 btrfs_root_item
*item
, struct btrfs_key
*key
);
2734 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2735 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2736 void btrfs_set_root_node(struct btrfs_root_item
*item
,
2737 struct extent_buffer
*node
);
2738 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2741 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2742 struct btrfs_root
*root
, const char *name
,
2743 int name_len
, struct inode
*dir
,
2744 struct btrfs_key
*location
, u8 type
, u64 index
);
2745 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2746 struct btrfs_root
*root
,
2747 struct btrfs_path
*path
, u64 dir
,
2748 const char *name
, int name_len
,
2750 struct btrfs_dir_item
*
2751 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2752 struct btrfs_root
*root
,
2753 struct btrfs_path
*path
, u64 dir
,
2754 u64 objectid
, const char *name
, int name_len
,
2756 struct btrfs_dir_item
*
2757 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2758 struct btrfs_path
*path
, u64 dirid
,
2759 const char *name
, int name_len
);
2760 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2761 struct btrfs_path
*path
,
2762 const char *name
, int name_len
);
2763 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2764 struct btrfs_root
*root
,
2765 struct btrfs_path
*path
,
2766 struct btrfs_dir_item
*di
);
2767 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2768 struct btrfs_root
*root
,
2769 struct btrfs_path
*path
, u64 objectid
,
2770 const char *name
, u16 name_len
,
2771 const void *data
, u16 data_len
);
2772 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2773 struct btrfs_root
*root
,
2774 struct btrfs_path
*path
, u64 dir
,
2775 const char *name
, u16 name_len
,
2777 int verify_dir_item(struct btrfs_root
*root
,
2778 struct extent_buffer
*leaf
,
2779 struct btrfs_dir_item
*dir_item
);
2782 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2783 struct btrfs_root
*root
, u64 offset
);
2784 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2785 struct btrfs_root
*root
, u64 offset
);
2786 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2789 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2790 struct btrfs_root
*root
,
2791 const char *name
, int name_len
,
2792 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2793 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2794 struct btrfs_root
*root
,
2795 const char *name
, int name_len
,
2796 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2797 struct btrfs_inode_ref
*
2798 btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2799 struct btrfs_root
*root
,
2800 struct btrfs_path
*path
,
2801 const char *name
, int name_len
,
2802 u64 inode_objectid
, u64 ref_objectid
, int mod
);
2803 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2804 struct btrfs_root
*root
,
2805 struct btrfs_path
*path
, u64 objectid
);
2806 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2807 *root
, struct btrfs_path
*path
,
2808 struct btrfs_key
*location
, int mod
);
2811 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2812 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2813 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2814 struct bio
*bio
, u32
*dst
);
2815 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
2816 struct bio
*bio
, u64 logical_offset
, u32
*dst
);
2817 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2818 struct btrfs_root
*root
,
2819 u64 objectid
, u64 pos
,
2820 u64 disk_offset
, u64 disk_num_bytes
,
2821 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2822 u8 compression
, u8 encryption
, u16 other_encoding
);
2823 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2824 struct btrfs_root
*root
,
2825 struct btrfs_path
*path
, u64 objectid
,
2826 u64 bytenr
, int mod
);
2827 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2828 struct btrfs_root
*root
,
2829 struct btrfs_ordered_sum
*sums
);
2830 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2831 struct bio
*bio
, u64 file_start
, int contig
);
2832 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2833 struct btrfs_root
*root
,
2834 struct btrfs_path
*path
,
2835 u64 bytenr
, int cow
);
2836 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2837 struct btrfs_root
*root
, struct btrfs_path
*path
,
2839 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
2840 struct list_head
*list
, int search_commit
);
2842 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
2843 size_t pg_offset
, u64 start
, u64 len
,
2846 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2847 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2848 #define ClearPageChecked ClearPageFsMisc
2849 #define SetPageChecked SetPageFsMisc
2850 #define PageChecked PageFsMisc
2853 /* This forces readahead on a given range of bytes in an inode */
2854 static inline void btrfs_force_ra(struct address_space
*mapping
,
2855 struct file_ra_state
*ra
, struct file
*file
,
2856 pgoff_t offset
, unsigned long req_size
)
2858 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
2861 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2862 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2863 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2864 struct btrfs_root
*root
,
2865 struct inode
*dir
, struct inode
*inode
,
2866 const char *name
, int name_len
);
2867 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2868 struct inode
*parent_inode
, struct inode
*inode
,
2869 const char *name
, int name_len
, int add_backref
, u64 index
);
2870 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2871 struct btrfs_root
*root
,
2872 struct inode
*dir
, u64 objectid
,
2873 const char *name
, int name_len
);
2874 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2875 struct btrfs_root
*root
,
2876 struct inode
*inode
, u64 new_size
,
2879 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2880 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
2881 struct extent_state
**cached_state
);
2882 int btrfs_writepages(struct address_space
*mapping
,
2883 struct writeback_control
*wbc
);
2884 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2885 struct btrfs_root
*new_root
, u64 new_dirid
);
2886 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2887 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2889 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2890 int btrfs_readpage(struct file
*file
, struct page
*page
);
2891 void btrfs_evict_inode(struct inode
*inode
);
2892 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
2893 int btrfs_dirty_inode(struct inode
*inode
);
2894 int btrfs_update_time(struct file
*file
);
2895 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2896 void btrfs_destroy_inode(struct inode
*inode
);
2897 int btrfs_drop_inode(struct inode
*inode
);
2898 int btrfs_init_cachep(void);
2899 void btrfs_destroy_cachep(void);
2900 long btrfs_ioctl_trans_end(struct file
*file
);
2901 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2902 struct btrfs_root
*root
, int *was_new
);
2903 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2904 size_t pg_offset
, u64 start
, u64 end
,
2906 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2907 struct btrfs_root
*root
,
2908 struct inode
*inode
);
2909 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2910 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2911 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
2912 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
2913 struct btrfs_root
*root
);
2914 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
2915 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
2916 void btrfs_add_delayed_iput(struct inode
*inode
);
2917 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
2918 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
2919 u64 start
, u64 num_bytes
, u64 min_size
,
2920 loff_t actual_len
, u64
*alloc_hint
);
2921 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
2922 struct btrfs_trans_handle
*trans
, int mode
,
2923 u64 start
, u64 num_bytes
, u64 min_size
,
2924 loff_t actual_len
, u64
*alloc_hint
);
2925 extern const struct dentry_operations btrfs_dentry_operations
;
2928 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2929 void btrfs_update_iflags(struct inode
*inode
);
2930 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2931 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
2932 struct btrfs_ioctl_defrag_range_args
*range
,
2933 u64 newer_than
, unsigned long max_pages
);
2935 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
2936 struct inode
*inode
);
2937 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
2938 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
2939 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2941 extern const struct file_operations btrfs_file_operations
;
2942 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
2943 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
2944 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2945 struct inode
*inode
, u64 start
, u64 end
);
2946 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2947 void btrfs_drop_pages(struct page
**pages
, size_t num_pages
);
2948 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
2949 struct page
**pages
, size_t num_pages
,
2950 loff_t pos
, size_t write_bytes
,
2951 struct extent_state
**cached
);
2954 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2955 struct btrfs_root
*root
, int cache_only
);
2958 int btrfs_init_sysfs(void);
2959 void btrfs_exit_sysfs(void);
2962 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2965 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2966 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2967 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
2968 unsigned int line
, int errno
);
2970 #define btrfs_std_error(fs_info, errno) \
2973 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2976 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
2977 unsigned int line
, int errno
, const char *fmt
, ...);
2979 #define btrfs_panic(fs_info, errno, fmt, args...) \
2981 struct btrfs_fs_info *_i = (fs_info); \
2982 __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
2983 BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
2987 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2988 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
2989 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2990 struct inode
*inode
, struct inode
*dir
);
2991 int btrfs_acl_chmod(struct inode
*inode
);
2993 #define btrfs_get_acl NULL
2994 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2995 struct inode
*inode
, struct inode
*dir
)
2999 static inline int btrfs_acl_chmod(struct inode
*inode
)
3006 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3007 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3008 struct btrfs_root
*root
);
3009 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3010 struct btrfs_root
*root
);
3011 int btrfs_recover_relocation(struct btrfs_root
*root
);
3012 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3013 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3014 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3015 struct extent_buffer
*cow
);
3016 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
3017 struct btrfs_pending_snapshot
*pending
,
3018 u64
*bytes_to_reserve
);
3019 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3020 struct btrfs_pending_snapshot
*pending
);
3023 int btrfs_scrub_dev(struct btrfs_root
*root
, u64 devid
, u64 start
, u64 end
,
3024 struct btrfs_scrub_progress
*progress
, int readonly
);
3025 void btrfs_scrub_pause(struct btrfs_root
*root
);
3026 void btrfs_scrub_pause_super(struct btrfs_root
*root
);
3027 void btrfs_scrub_continue(struct btrfs_root
*root
);
3028 void btrfs_scrub_continue_super(struct btrfs_root
*root
);
3029 int btrfs_scrub_cancel(struct btrfs_root
*root
);
3030 int btrfs_scrub_cancel_dev(struct btrfs_root
*root
, struct btrfs_device
*dev
);
3031 int btrfs_scrub_cancel_devid(struct btrfs_root
*root
, u64 devid
);
3032 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
3033 struct btrfs_scrub_progress
*progress
);
3036 struct reada_control
{
3037 struct btrfs_root
*root
; /* tree to prefetch */
3038 struct btrfs_key key_start
;
3039 struct btrfs_key key_end
; /* exclusive */
3042 wait_queue_head_t wait
;
3044 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3045 struct btrfs_key
*start
, struct btrfs_key
*end
);
3046 int btrfs_reada_wait(void *handle
);
3047 void btrfs_reada_detach(void *handle
);
3048 int btree_readahead_hook(struct btrfs_root
*root
, struct extent_buffer
*eb
,
3049 u64 start
, int err
);