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_MIRRORS 2
53 #define BTRFS_MAX_LEVEL 8
55 #define BTRFS_COMPAT_EXTENT_TREE_V0
58 * files bigger than this get some pre-flushing when they are added
59 * to the ordered operations list. That way we limit the total
60 * work done by the commit
62 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
64 /* holds pointers to all of the tree roots */
65 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
67 /* stores information about which extents are in use, and reference counts */
68 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
71 * chunk tree stores translations from logical -> physical block numbering
72 * the super block points to the chunk tree
74 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
77 * stores information about which areas of a given device are in use.
78 * one per device. The tree of tree roots points to the device tree
80 #define BTRFS_DEV_TREE_OBJECTID 4ULL
82 /* one per subvolume, storing files and directories */
83 #define BTRFS_FS_TREE_OBJECTID 5ULL
85 /* directory objectid inside the root tree */
86 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
88 /* holds checksums of all the data extents */
89 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
91 /* for storing balance parameters in the root tree */
92 #define BTRFS_BALANCE_OBJECTID -4ULL
94 /* orhpan objectid for tracking unlinked/truncated files */
95 #define BTRFS_ORPHAN_OBJECTID -5ULL
97 /* does write ahead logging to speed up fsyncs */
98 #define BTRFS_TREE_LOG_OBJECTID -6ULL
99 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
101 /* for space balancing */
102 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
103 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
106 * extent checksums all have this objectid
107 * this allows them to share the logging tree
110 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
112 /* For storing free space cache */
113 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
116 * The inode number assigned to the special inode for sotring
119 #define BTRFS_FREE_INO_OBJECTID -12ULL
121 /* dummy objectid represents multiple objectids */
122 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
125 * All files have objectids in this range.
127 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
128 #define BTRFS_LAST_FREE_OBJECTID -256ULL
129 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
133 * the device items go into the chunk tree. The key is in the form
134 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
136 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
138 #define BTRFS_BTREE_INODE_OBJECTID 1
140 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
143 * the max metadata block size. This limit is somewhat artificial,
144 * but the memmove costs go through the roof for larger blocks.
146 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
149 * we can actually store much bigger names, but lets not confuse the rest
152 #define BTRFS_NAME_LEN 255
154 /* 32 bytes in various csum fields */
155 #define BTRFS_CSUM_SIZE 32
158 #define BTRFS_CSUM_TYPE_CRC32 0
160 static int btrfs_csum_sizes
[] = { 4, 0 };
162 /* four bytes for CRC32 */
163 #define BTRFS_EMPTY_DIR_SIZE 0
165 #define BTRFS_FT_UNKNOWN 0
166 #define BTRFS_FT_REG_FILE 1
167 #define BTRFS_FT_DIR 2
168 #define BTRFS_FT_CHRDEV 3
169 #define BTRFS_FT_BLKDEV 4
170 #define BTRFS_FT_FIFO 5
171 #define BTRFS_FT_SOCK 6
172 #define BTRFS_FT_SYMLINK 7
173 #define BTRFS_FT_XATTR 8
174 #define BTRFS_FT_MAX 9
176 /* ioprio of readahead is set to idle */
177 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
180 * The key defines the order in the tree, and so it also defines (optimal)
183 * objectid corresponds to the inode number.
185 * type tells us things about the object, and is a kind of stream selector.
186 * so for a given inode, keys with type of 1 might refer to the inode data,
187 * type of 2 may point to file data in the btree and type == 3 may point to
190 * offset is the starting byte offset for this key in the stream.
192 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
193 * in cpu native order. Otherwise they are identical and their sizes
194 * should be the same (ie both packed)
196 struct btrfs_disk_key
{
200 } __attribute__ ((__packed__
));
206 } __attribute__ ((__packed__
));
208 struct btrfs_mapping_tree
{
209 struct extent_map_tree map_tree
;
212 struct btrfs_dev_item
{
213 /* the internal btrfs device id */
216 /* size of the device */
222 /* optimal io alignment for this device */
225 /* optimal io width for this device */
228 /* minimal io size for this device */
231 /* type and info about this device */
234 /* expected generation for this device */
238 * starting byte of this partition on the device,
239 * to allow for stripe alignment in the future
243 /* grouping information for allocation decisions */
246 /* seek speed 0-100 where 100 is fastest */
249 /* bandwidth 0-100 where 100 is fastest */
252 /* btrfs generated uuid for this device */
253 u8 uuid
[BTRFS_UUID_SIZE
];
255 /* uuid of FS who owns this device */
256 u8 fsid
[BTRFS_UUID_SIZE
];
257 } __attribute__ ((__packed__
));
259 struct btrfs_stripe
{
262 u8 dev_uuid
[BTRFS_UUID_SIZE
];
263 } __attribute__ ((__packed__
));
266 /* size of this chunk in bytes */
269 /* objectid of the root referencing this chunk */
275 /* optimal io alignment for this chunk */
278 /* optimal io width for this chunk */
281 /* minimal io size for this chunk */
284 /* 2^16 stripes is quite a lot, a second limit is the size of a single
289 /* sub stripes only matter for raid10 */
291 struct btrfs_stripe stripe
;
292 /* additional stripes go here */
293 } __attribute__ ((__packed__
));
295 #define BTRFS_FREE_SPACE_EXTENT 1
296 #define BTRFS_FREE_SPACE_BITMAP 2
298 struct btrfs_free_space_entry
{
302 } __attribute__ ((__packed__
));
304 struct btrfs_free_space_header
{
305 struct btrfs_disk_key location
;
309 } __attribute__ ((__packed__
));
311 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
313 BUG_ON(num_stripes
== 0);
314 return sizeof(struct btrfs_chunk
) +
315 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
318 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
319 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
325 /* Errors detected */
326 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
328 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
329 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
331 #define BTRFS_BACKREF_REV_MAX 256
332 #define BTRFS_BACKREF_REV_SHIFT 56
333 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
334 BTRFS_BACKREF_REV_SHIFT)
336 #define BTRFS_OLD_BACKREF_REV 0
337 #define BTRFS_MIXED_BACKREF_REV 1
340 * every tree block (leaf or node) starts with this header.
342 struct btrfs_header
{
343 /* these first four must match the super block */
344 u8 csum
[BTRFS_CSUM_SIZE
];
345 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
346 __le64 bytenr
; /* which block this node is supposed to live in */
349 /* allowed to be different from the super from here on down */
350 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
355 } __attribute__ ((__packed__
));
357 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
358 sizeof(struct btrfs_header)) / \
359 sizeof(struct btrfs_key_ptr))
360 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
361 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
362 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
363 sizeof(struct btrfs_item) - \
364 sizeof(struct btrfs_file_extent_item))
365 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
366 sizeof(struct btrfs_item) -\
367 sizeof(struct btrfs_dir_item))
371 * this is a very generous portion of the super block, giving us
372 * room to translate 14 chunks with 3 stripes each.
374 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
375 #define BTRFS_LABEL_SIZE 256
378 * just in case we somehow lose the roots and are not able to mount,
379 * we store an array of the roots from previous transactions
382 #define BTRFS_NUM_BACKUP_ROOTS 4
383 struct btrfs_root_backup
{
385 __le64 tree_root_gen
;
388 __le64 chunk_root_gen
;
391 __le64 extent_root_gen
;
400 __le64 csum_root_gen
;
410 u8 extent_root_level
;
414 /* future and to align */
416 } __attribute__ ((__packed__
));
419 * the super block basically lists the main trees of the FS
420 * it currently lacks any block count etc etc
422 struct btrfs_super_block
{
423 u8 csum
[BTRFS_CSUM_SIZE
];
424 /* the first 4 fields must match struct btrfs_header */
425 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
426 __le64 bytenr
; /* this block number */
429 /* allowed to be different from the btrfs_header from here own down */
436 /* this will help find the new super based on the log root */
437 __le64 log_root_transid
;
440 __le64 root_dir_objectid
;
446 __le32 sys_chunk_array_size
;
447 __le64 chunk_root_generation
;
449 __le64 compat_ro_flags
;
450 __le64 incompat_flags
;
455 struct btrfs_dev_item dev_item
;
457 char label
[BTRFS_LABEL_SIZE
];
459 __le64 cache_generation
;
461 /* future expansion */
463 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
464 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
465 } __attribute__ ((__packed__
));
468 * Compat flags that we support. If any incompat flags are set other than the
469 * ones specified below then we will fail to mount
471 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
472 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
473 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
474 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
476 * some patches floated around with a second compression method
477 * lets save that incompat here for when they do get in
478 * Note we don't actually support it, we're just reserving the
481 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
484 * older kernels tried to do bigger metadata blocks, but the
485 * code was pretty buggy. Lets not let them try anymore.
487 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
489 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
490 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
491 #define BTRFS_FEATURE_INCOMPAT_SUPP \
492 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
493 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
494 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
495 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
496 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
499 * A leaf is full of items. offset and size tell us where to find
500 * the item in the leaf (relative to the start of the data area)
503 struct btrfs_disk_key key
;
506 } __attribute__ ((__packed__
));
509 * leaves have an item area and a data area:
510 * [item0, item1....itemN] [free space] [dataN...data1, data0]
512 * The data is separate from the items to get the keys closer together
516 struct btrfs_header header
;
517 struct btrfs_item items
[];
518 } __attribute__ ((__packed__
));
521 * all non-leaf blocks are nodes, they hold only keys and pointers to
524 struct btrfs_key_ptr
{
525 struct btrfs_disk_key key
;
528 } __attribute__ ((__packed__
));
531 struct btrfs_header header
;
532 struct btrfs_key_ptr ptrs
[];
533 } __attribute__ ((__packed__
));
536 * btrfs_paths remember the path taken from the root down to the leaf.
537 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
538 * to any other levels that are present.
540 * The slots array records the index of the item or block pointer
541 * used while walking the tree.
544 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
545 int slots
[BTRFS_MAX_LEVEL
];
546 /* if there is real range locking, this locks field will change */
547 int locks
[BTRFS_MAX_LEVEL
];
549 /* keep some upper locks as we walk down */
553 * set by btrfs_split_item, tells search_slot to keep all locks
554 * and to force calls to keep space in the nodes
556 unsigned int search_for_split
:1;
557 unsigned int keep_locks
:1;
558 unsigned int skip_locking
:1;
559 unsigned int leave_spinning
:1;
560 unsigned int search_commit_root
:1;
564 * items in the extent btree are used to record the objectid of the
565 * owner of the block and the number of references
568 struct btrfs_extent_item
{
572 } __attribute__ ((__packed__
));
574 struct btrfs_extent_item_v0
{
576 } __attribute__ ((__packed__
));
578 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
579 sizeof(struct btrfs_item))
581 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
582 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
584 /* following flags only apply to tree blocks */
586 /* use full backrefs for extent pointers in the block */
587 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
590 * this flag is only used internally by scrub and may be changed at any time
591 * it is only declared here to avoid collisions
593 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
595 struct btrfs_tree_block_info
{
596 struct btrfs_disk_key key
;
598 } __attribute__ ((__packed__
));
600 struct btrfs_extent_data_ref
{
605 } __attribute__ ((__packed__
));
607 struct btrfs_shared_data_ref
{
609 } __attribute__ ((__packed__
));
611 struct btrfs_extent_inline_ref
{
614 } __attribute__ ((__packed__
));
616 /* old style backrefs item */
617 struct btrfs_extent_ref_v0
{
622 } __attribute__ ((__packed__
));
625 /* dev extents record free space on individual devices. The owner
626 * field points back to the chunk allocation mapping tree that allocated
627 * the extent. The chunk tree uuid field is a way to double check the owner
629 struct btrfs_dev_extent
{
631 __le64 chunk_objectid
;
634 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
635 } __attribute__ ((__packed__
));
637 struct btrfs_inode_ref
{
641 } __attribute__ ((__packed__
));
643 struct btrfs_timespec
{
646 } __attribute__ ((__packed__
));
648 enum btrfs_compression_type
{
649 BTRFS_COMPRESS_NONE
= 0,
650 BTRFS_COMPRESS_ZLIB
= 1,
651 BTRFS_COMPRESS_LZO
= 2,
652 BTRFS_COMPRESS_TYPES
= 2,
653 BTRFS_COMPRESS_LAST
= 3,
656 struct btrfs_inode_item
{
657 /* nfs style generation number */
659 /* transid that last touched this inode */
671 /* modification sequence number for NFS */
675 * a little future expansion, for more than this we can
676 * just grow the inode item and version it
679 struct btrfs_timespec atime
;
680 struct btrfs_timespec ctime
;
681 struct btrfs_timespec mtime
;
682 struct btrfs_timespec otime
;
683 } __attribute__ ((__packed__
));
685 struct btrfs_dir_log_item
{
687 } __attribute__ ((__packed__
));
689 struct btrfs_dir_item
{
690 struct btrfs_disk_key location
;
695 } __attribute__ ((__packed__
));
697 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
699 struct btrfs_root_item
{
700 struct btrfs_inode_item inode
;
706 __le64 last_snapshot
;
709 struct btrfs_disk_key drop_progress
;
712 } __attribute__ ((__packed__
));
715 * this is used for both forward and backward root refs
717 struct btrfs_root_ref
{
721 } __attribute__ ((__packed__
));
723 struct btrfs_disk_balance_args
{
725 * profiles to operate on, single is denoted by
726 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
736 /* devid subset filter [pstart..pend) */
740 /* btrfs virtual address space subset filter [vstart..vend) */
745 * profile to convert to, single is denoted by
746 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
750 /* BTRFS_BALANCE_ARGS_* */
754 } __attribute__ ((__packed__
));
757 * store balance parameters to disk so that balance can be properly
758 * resumed after crash or unmount
760 struct btrfs_balance_item
{
761 /* BTRFS_BALANCE_* */
764 struct btrfs_disk_balance_args data
;
765 struct btrfs_disk_balance_args meta
;
766 struct btrfs_disk_balance_args sys
;
769 } __attribute__ ((__packed__
));
771 #define BTRFS_FILE_EXTENT_INLINE 0
772 #define BTRFS_FILE_EXTENT_REG 1
773 #define BTRFS_FILE_EXTENT_PREALLOC 2
775 struct btrfs_file_extent_item
{
777 * transaction id that created this extent
781 * max number of bytes to hold this extent in ram
782 * when we split a compressed extent we can't know how big
783 * each of the resulting pieces will be. So, this is
784 * an upper limit on the size of the extent in ram instead of
790 * 32 bits for the various ways we might encode the data,
791 * including compression and encryption. If any of these
792 * are set to something a given disk format doesn't understand
793 * it is treated like an incompat flag for reading and writing,
798 __le16 other_encoding
; /* spare for later use */
800 /* are we inline data or a real extent? */
804 * disk space consumed by the extent, checksum blocks are included
808 __le64 disk_num_bytes
;
810 * the logical offset in file blocks (no csums)
811 * this extent record is for. This allows a file extent to point
812 * into the middle of an existing extent on disk, sharing it
813 * between two snapshots (useful if some bytes in the middle of the
814 * extent have changed
818 * the logical number of file blocks (no csums included). This
819 * always reflects the size uncompressed and without encoding.
823 } __attribute__ ((__packed__
));
825 struct btrfs_csum_item
{
827 } __attribute__ ((__packed__
));
829 struct btrfs_dev_stats_item
{
831 * grow this item struct at the end for future enhancements and keep
832 * the existing values unchanged
834 __le64 values
[BTRFS_DEV_STAT_VALUES_MAX
];
835 } __attribute__ ((__packed__
));
837 /* different types of block groups (and chunks) */
838 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
839 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
840 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
841 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
842 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
843 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
844 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
845 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
846 #define BTRFS_NR_RAID_TYPES 5
848 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
849 BTRFS_BLOCK_GROUP_SYSTEM | \
850 BTRFS_BLOCK_GROUP_METADATA)
852 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
853 BTRFS_BLOCK_GROUP_RAID1 | \
854 BTRFS_BLOCK_GROUP_DUP | \
855 BTRFS_BLOCK_GROUP_RAID10)
857 * We need a bit for restriper to be able to tell when chunks of type
858 * SINGLE are available. This "extended" profile format is used in
859 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
860 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
861 * to avoid remappings between two formats in future.
863 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
865 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
866 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
868 static inline u64
chunk_to_extended(u64 flags
)
870 if ((flags
& BTRFS_BLOCK_GROUP_PROFILE_MASK
) == 0)
871 flags
|= BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
875 static inline u64
extended_to_chunk(u64 flags
)
877 return flags
& ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
880 struct btrfs_block_group_item
{
882 __le64 chunk_objectid
;
884 } __attribute__ ((__packed__
));
886 struct btrfs_space_info
{
889 u64 total_bytes
; /* total bytes in the space,
890 this doesn't take mirrors into account */
891 u64 bytes_used
; /* total bytes used,
892 this doesn't take mirrors into account */
893 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
894 transaction finishes */
895 u64 bytes_reserved
; /* total bytes the allocator has reserved for
896 current allocations */
897 u64 bytes_readonly
; /* total bytes that are read only */
899 u64 bytes_may_use
; /* number of bytes that may be used for
900 delalloc/allocations */
901 u64 disk_used
; /* total bytes used on disk */
902 u64 disk_total
; /* total bytes on disk, takes mirrors into
906 * we bump reservation progress every time we decrement
907 * bytes_reserved. This way people waiting for reservations
908 * know something good has happened and they can check
909 * for progress. The number here isn't to be trusted, it
910 * just shows reclaim activity
912 unsigned long reservation_progress
;
914 unsigned int full
:1; /* indicates that we cannot allocate any more
915 chunks for this space */
916 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
918 unsigned int flush
:1; /* set if we are trying to make space */
920 unsigned int force_alloc
; /* set if we need to force a chunk
921 alloc for this space */
923 struct list_head list
;
925 /* for block groups in our same type */
926 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
928 struct rw_semaphore groups_sem
;
929 wait_queue_head_t wait
;
932 struct btrfs_block_rsv
{
935 struct btrfs_space_info
*space_info
;
941 * free clusters are used to claim free space in relatively large chunks,
942 * allowing us to do less seeky writes. They are used for all metadata
943 * allocations and data allocations in ssd mode.
945 struct btrfs_free_cluster
{
947 spinlock_t refill_lock
;
950 /* largest extent in this cluster */
953 /* first extent starting offset */
956 struct btrfs_block_group_cache
*block_group
;
958 * when a cluster is allocated from a block group, we put the
959 * cluster onto a list in the block group so that it can
960 * be freed before the block group is freed.
962 struct list_head block_group_list
;
965 enum btrfs_caching_type
{
967 BTRFS_CACHE_STARTED
= 1,
968 BTRFS_CACHE_FAST
= 2,
969 BTRFS_CACHE_FINISHED
= 3,
972 enum btrfs_disk_cache_state
{
973 BTRFS_DC_WRITTEN
= 0,
977 BTRFS_DC_NEED_WRITE
= 4,
980 struct btrfs_caching_control
{
981 struct list_head list
;
983 wait_queue_head_t wait
;
984 struct btrfs_work work
;
985 struct btrfs_block_group_cache
*block_group
;
990 struct btrfs_block_group_cache
{
991 struct btrfs_key key
;
992 struct btrfs_block_group_item item
;
993 struct btrfs_fs_info
*fs_info
;
1001 u64 cache_generation
;
1003 unsigned int dirty
:1;
1004 unsigned int iref
:1;
1006 int disk_cache_state
;
1008 /* cache tracking stuff */
1010 struct btrfs_caching_control
*caching_ctl
;
1011 u64 last_byte_to_unpin
;
1013 struct btrfs_space_info
*space_info
;
1015 /* free space cache stuff */
1016 struct btrfs_free_space_ctl
*free_space_ctl
;
1018 /* block group cache stuff */
1019 struct rb_node cache_node
;
1021 /* for block groups in the same raid type */
1022 struct list_head list
;
1027 /* List of struct btrfs_free_clusters for this block group.
1028 * Today it will only have one thing on it, but that may change
1030 struct list_head cluster_list
;
1033 struct reloc_control
;
1034 struct btrfs_device
;
1035 struct btrfs_fs_devices
;
1036 struct btrfs_balance_control
;
1037 struct btrfs_delayed_root
;
1038 struct btrfs_fs_info
{
1039 u8 fsid
[BTRFS_FSID_SIZE
];
1040 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1041 struct btrfs_root
*extent_root
;
1042 struct btrfs_root
*tree_root
;
1043 struct btrfs_root
*chunk_root
;
1044 struct btrfs_root
*dev_root
;
1045 struct btrfs_root
*fs_root
;
1046 struct btrfs_root
*csum_root
;
1048 /* the log root tree is a directory of all the other log roots */
1049 struct btrfs_root
*log_root_tree
;
1051 spinlock_t fs_roots_radix_lock
;
1052 struct radix_tree_root fs_roots_radix
;
1054 /* block group cache stuff */
1055 spinlock_t block_group_cache_lock
;
1056 struct rb_root block_group_cache_tree
;
1058 /* keep track of unallocated space */
1059 spinlock_t free_chunk_lock
;
1060 u64 free_chunk_space
;
1062 struct extent_io_tree freed_extents
[2];
1063 struct extent_io_tree
*pinned_extents
;
1065 /* logical->physical extent mapping */
1066 struct btrfs_mapping_tree mapping_tree
;
1069 * block reservation for extent, checksum, root tree and
1070 * delayed dir index item
1072 struct btrfs_block_rsv global_block_rsv
;
1073 /* block reservation for delay allocation */
1074 struct btrfs_block_rsv delalloc_block_rsv
;
1075 /* block reservation for metadata operations */
1076 struct btrfs_block_rsv trans_block_rsv
;
1077 /* block reservation for chunk tree */
1078 struct btrfs_block_rsv chunk_block_rsv
;
1079 /* block reservation for delayed operations */
1080 struct btrfs_block_rsv delayed_block_rsv
;
1082 struct btrfs_block_rsv empty_block_rsv
;
1085 u64 last_trans_committed
;
1088 * this is updated to the current trans every time a full commit
1089 * is required instead of the faster short fsync log commits
1091 u64 last_trans_log_full_commit
;
1092 unsigned long mount_opt
;
1093 unsigned long compress_type
:4;
1096 struct btrfs_transaction
*running_transaction
;
1097 wait_queue_head_t transaction_throttle
;
1098 wait_queue_head_t transaction_wait
;
1099 wait_queue_head_t transaction_blocked_wait
;
1100 wait_queue_head_t async_submit_wait
;
1102 struct btrfs_super_block
*super_copy
;
1103 struct btrfs_super_block
*super_for_commit
;
1104 struct block_device
*__bdev
;
1105 struct super_block
*sb
;
1106 struct inode
*btree_inode
;
1107 struct backing_dev_info bdi
;
1108 struct mutex tree_log_mutex
;
1109 struct mutex transaction_kthread_mutex
;
1110 struct mutex cleaner_mutex
;
1111 struct mutex chunk_mutex
;
1112 struct mutex volume_mutex
;
1114 * this protects the ordered operations list only while we are
1115 * processing all of the entries on it. This way we make
1116 * sure the commit code doesn't find the list temporarily empty
1117 * because another function happens to be doing non-waiting preflush
1118 * before jumping into the main commit.
1120 struct mutex ordered_operations_mutex
;
1121 struct rw_semaphore extent_commit_sem
;
1123 struct rw_semaphore cleanup_work_sem
;
1125 struct rw_semaphore subvol_sem
;
1126 struct srcu_struct subvol_srcu
;
1128 spinlock_t trans_lock
;
1130 * the reloc mutex goes with the trans lock, it is taken
1131 * during commit to protect us from the relocation code
1133 struct mutex reloc_mutex
;
1135 struct list_head trans_list
;
1136 struct list_head hashers
;
1137 struct list_head dead_roots
;
1138 struct list_head caching_block_groups
;
1140 spinlock_t delayed_iput_lock
;
1141 struct list_head delayed_iputs
;
1143 /* this protects tree_mod_seq_list */
1144 spinlock_t tree_mod_seq_lock
;
1145 atomic_t tree_mod_seq
;
1146 struct list_head tree_mod_seq_list
;
1148 /* this protects tree_mod_log */
1149 rwlock_t tree_mod_log_lock
;
1150 struct rb_root tree_mod_log
;
1152 atomic_t nr_async_submits
;
1153 atomic_t async_submit_draining
;
1154 atomic_t nr_async_bios
;
1155 atomic_t async_delalloc_pages
;
1156 atomic_t open_ioctl_trans
;
1159 * this is used by the balancing code to wait for all the pending
1162 spinlock_t ordered_extent_lock
;
1165 * all of the data=ordered extents pending writeback
1166 * these can span multiple transactions and basically include
1167 * every dirty data page that isn't from nodatacow
1169 struct list_head ordered_extents
;
1172 * all of the inodes that have delalloc bytes. It is possible for
1173 * this list to be empty even when there is still dirty data=ordered
1174 * extents waiting to finish IO.
1176 struct list_head delalloc_inodes
;
1179 * special rename and truncate targets that must be on disk before
1180 * we're allowed to commit. This is basically the ext3 style
1181 * data=ordered list.
1183 struct list_head ordered_operations
;
1186 * there is a pool of worker threads for checksumming during writes
1187 * and a pool for checksumming after reads. This is because readers
1188 * can run with FS locks held, and the writers may be waiting for
1189 * those locks. We don't want ordering in the pending list to cause
1190 * deadlocks, and so the two are serviced separately.
1192 * A third pool does submit_bio to avoid deadlocking with the other
1195 struct btrfs_workers generic_worker
;
1196 struct btrfs_workers workers
;
1197 struct btrfs_workers delalloc_workers
;
1198 struct btrfs_workers endio_workers
;
1199 struct btrfs_workers endio_meta_workers
;
1200 struct btrfs_workers endio_meta_write_workers
;
1201 struct btrfs_workers endio_write_workers
;
1202 struct btrfs_workers endio_freespace_worker
;
1203 struct btrfs_workers submit_workers
;
1204 struct btrfs_workers caching_workers
;
1205 struct btrfs_workers readahead_workers
;
1208 * fixup workers take dirty pages that didn't properly go through
1209 * the cow mechanism and make them safe to write. It happens
1210 * for the sys_munmap function call path
1212 struct btrfs_workers fixup_workers
;
1213 struct btrfs_workers delayed_workers
;
1214 struct task_struct
*transaction_kthread
;
1215 struct task_struct
*cleaner_kthread
;
1216 int thread_pool_size
;
1218 struct kobject super_kobj
;
1219 struct completion kobj_unregister
;
1222 int log_root_recovering
;
1228 /* protected by the delalloc lock, used to keep from writing
1229 * metadata until there is a nice batch
1231 u64 dirty_metadata_bytes
;
1232 struct list_head dirty_cowonly_roots
;
1234 struct btrfs_fs_devices
*fs_devices
;
1237 * the space_info list is almost entirely read only. It only changes
1238 * when we add a new raid type to the FS, and that happens
1239 * very rarely. RCU is used to protect it.
1241 struct list_head space_info
;
1243 struct reloc_control
*reloc_ctl
;
1245 spinlock_t delalloc_lock
;
1248 /* data_alloc_cluster is only used in ssd mode */
1249 struct btrfs_free_cluster data_alloc_cluster
;
1251 /* all metadata allocations go through this cluster */
1252 struct btrfs_free_cluster meta_alloc_cluster
;
1254 /* auto defrag inodes go here */
1255 spinlock_t defrag_inodes_lock
;
1256 struct rb_root defrag_inodes
;
1257 atomic_t defrag_running
;
1259 spinlock_t ref_cache_lock
;
1260 u64 total_ref_cache_size
;
1263 * these three are in extended format (availability of single
1264 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1265 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1267 u64 avail_data_alloc_bits
;
1268 u64 avail_metadata_alloc_bits
;
1269 u64 avail_system_alloc_bits
;
1271 /* restriper state */
1272 spinlock_t balance_lock
;
1273 struct mutex balance_mutex
;
1274 atomic_t balance_running
;
1275 atomic_t balance_pause_req
;
1276 atomic_t balance_cancel_req
;
1277 struct btrfs_balance_control
*balance_ctl
;
1278 wait_queue_head_t balance_wait_q
;
1280 unsigned data_chunk_allocations
;
1281 unsigned metadata_ratio
;
1285 /* private scrub information */
1286 struct mutex scrub_lock
;
1287 atomic_t scrubs_running
;
1288 atomic_t scrub_pause_req
;
1289 atomic_t scrubs_paused
;
1290 atomic_t scrub_cancel_req
;
1291 wait_queue_head_t scrub_pause_wait
;
1292 struct rw_semaphore scrub_super_lock
;
1293 int scrub_workers_refcnt
;
1294 struct btrfs_workers scrub_workers
;
1296 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1297 u32 check_integrity_print_mask
;
1300 /* filesystem state */
1303 struct btrfs_delayed_root
*delayed_root
;
1305 /* readahead tree */
1306 spinlock_t reada_lock
;
1307 struct radix_tree_root reada_tree
;
1309 /* next backup root to be overwritten */
1310 int backup_root_index
;
1314 * in ram representation of the tree. extent_root is used for all allocations
1315 * and for the extent tree extent_root root.
1318 struct extent_buffer
*node
;
1320 struct extent_buffer
*commit_root
;
1321 struct btrfs_root
*log_root
;
1322 struct btrfs_root
*reloc_root
;
1324 struct btrfs_root_item root_item
;
1325 struct btrfs_key root_key
;
1326 struct btrfs_fs_info
*fs_info
;
1327 struct extent_io_tree dirty_log_pages
;
1329 struct kobject root_kobj
;
1330 struct completion kobj_unregister
;
1331 struct mutex objectid_mutex
;
1333 spinlock_t accounting_lock
;
1334 struct btrfs_block_rsv
*block_rsv
;
1336 /* free ino cache stuff */
1337 struct mutex fs_commit_mutex
;
1338 struct btrfs_free_space_ctl
*free_ino_ctl
;
1339 enum btrfs_caching_type cached
;
1340 spinlock_t cache_lock
;
1341 wait_queue_head_t cache_wait
;
1342 struct btrfs_free_space_ctl
*free_ino_pinned
;
1344 struct inode
*cache_inode
;
1346 struct mutex log_mutex
;
1347 wait_queue_head_t log_writer_wait
;
1348 wait_queue_head_t log_commit_wait
[2];
1349 atomic_t log_writers
;
1350 atomic_t log_commit
[2];
1351 unsigned long log_transid
;
1352 unsigned long last_log_commit
;
1353 unsigned long log_batch
;
1354 pid_t log_start_pid
;
1355 bool log_multiple_pids
;
1360 /* data allocations are done in sectorsize units */
1363 /* node allocations are done in nodesize units */
1366 /* leaf allocations are done in leafsize units */
1373 u64 highest_objectid
;
1375 /* btrfs_record_root_in_trans is a multi-step process,
1376 * and it can race with the balancing code. But the
1377 * race is very small, and only the first time the root
1378 * is added to each transaction. So in_trans_setup
1379 * is used to tell us when more checks are required
1381 unsigned long in_trans_setup
;
1386 u64 defrag_trans_start
;
1387 struct btrfs_key defrag_progress
;
1388 struct btrfs_key defrag_max
;
1392 /* the dirty list is only used by non-reference counted roots */
1393 struct list_head dirty_list
;
1395 struct list_head root_list
;
1397 spinlock_t orphan_lock
;
1398 atomic_t orphan_inodes
;
1399 struct btrfs_block_rsv
*orphan_block_rsv
;
1400 int orphan_item_inserted
;
1401 int orphan_cleanup_state
;
1403 spinlock_t inode_lock
;
1404 /* red-black tree that keeps track of in-memory inodes */
1405 struct rb_root inode_tree
;
1408 * radix tree that keeps track of delayed nodes of every inode,
1409 * protected by inode_lock
1411 struct radix_tree_root delayed_nodes_tree
;
1413 * right now this just gets used so that a root has its own devid
1414 * for stat. It may be used for more later
1421 struct btrfs_ioctl_defrag_range_args
{
1422 /* start of the defrag operation */
1425 /* number of bytes to defrag, use (u64)-1 to say all */
1429 * flags for the operation, which can include turning
1430 * on compression for this one defrag
1435 * any extent bigger than this will be considered
1436 * already defragged. Use 0 to take the kernel default
1437 * Use 1 to say every single extent must be rewritten
1439 __u32 extent_thresh
;
1442 * which compression method to use if turning on compression
1443 * for this defrag operation. If unspecified, zlib will
1446 __u32 compress_type
;
1448 /* spare for later */
1454 * inode items have the data typically returned from stat and store other
1455 * info about object characteristics. There is one for every file and dir in
1458 #define BTRFS_INODE_ITEM_KEY 1
1459 #define BTRFS_INODE_REF_KEY 12
1460 #define BTRFS_XATTR_ITEM_KEY 24
1461 #define BTRFS_ORPHAN_ITEM_KEY 48
1462 /* reserve 2-15 close to the inode for later flexibility */
1465 * dir items are the name -> inode pointers in a directory. There is one
1466 * for every name in a directory.
1468 #define BTRFS_DIR_LOG_ITEM_KEY 60
1469 #define BTRFS_DIR_LOG_INDEX_KEY 72
1470 #define BTRFS_DIR_ITEM_KEY 84
1471 #define BTRFS_DIR_INDEX_KEY 96
1473 * extent data is for file data
1475 #define BTRFS_EXTENT_DATA_KEY 108
1478 * extent csums are stored in a separate tree and hold csums for
1479 * an entire extent on disk.
1481 #define BTRFS_EXTENT_CSUM_KEY 128
1484 * root items point to tree roots. They are typically in the root
1485 * tree used by the super block to find all the other trees
1487 #define BTRFS_ROOT_ITEM_KEY 132
1490 * root backrefs tie subvols and snapshots to the directory entries that
1493 #define BTRFS_ROOT_BACKREF_KEY 144
1496 * root refs make a fast index for listing all of the snapshots and
1497 * subvolumes referenced by a given root. They point directly to the
1498 * directory item in the root that references the subvol
1500 #define BTRFS_ROOT_REF_KEY 156
1503 * extent items are in the extent map tree. These record which blocks
1504 * are used, and how many references there are to each block
1506 #define BTRFS_EXTENT_ITEM_KEY 168
1508 #define BTRFS_TREE_BLOCK_REF_KEY 176
1510 #define BTRFS_EXTENT_DATA_REF_KEY 178
1512 #define BTRFS_EXTENT_REF_V0_KEY 180
1514 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1516 #define BTRFS_SHARED_DATA_REF_KEY 184
1519 * block groups give us hints into the extent allocation trees. Which
1520 * blocks are free etc etc
1522 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1524 #define BTRFS_DEV_EXTENT_KEY 204
1525 #define BTRFS_DEV_ITEM_KEY 216
1526 #define BTRFS_CHUNK_ITEM_KEY 228
1528 #define BTRFS_BALANCE_ITEM_KEY 248
1531 * Persistantly stores the io stats in the device tree.
1532 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1534 #define BTRFS_DEV_STATS_KEY 249
1537 * string items are for debugging. They just store a short string of
1540 #define BTRFS_STRING_ITEM_KEY 253
1543 * Flags for mount options.
1545 * Note: don't forget to add new options to btrfs_show_options()
1547 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1548 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1549 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1550 #define BTRFS_MOUNT_SSD (1 << 3)
1551 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1552 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1553 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1554 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1555 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1556 #define BTRFS_MOUNT_NOSSD (1 << 9)
1557 #define BTRFS_MOUNT_DISCARD (1 << 10)
1558 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1559 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1560 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1561 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1562 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1563 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1564 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1565 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1566 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1567 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1568 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1569 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1571 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1572 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1573 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1578 #define BTRFS_INODE_NODATASUM (1 << 0)
1579 #define BTRFS_INODE_NODATACOW (1 << 1)
1580 #define BTRFS_INODE_READONLY (1 << 2)
1581 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1582 #define BTRFS_INODE_PREALLOC (1 << 4)
1583 #define BTRFS_INODE_SYNC (1 << 5)
1584 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1585 #define BTRFS_INODE_APPEND (1 << 7)
1586 #define BTRFS_INODE_NODUMP (1 << 8)
1587 #define BTRFS_INODE_NOATIME (1 << 9)
1588 #define BTRFS_INODE_DIRSYNC (1 << 10)
1589 #define BTRFS_INODE_COMPRESS (1 << 11)
1591 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1593 struct btrfs_map_token
{
1594 struct extent_buffer
*eb
;
1596 unsigned long offset
;
1599 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1601 memset(token
, 0, sizeof(*token
));
1604 /* some macros to generate set/get funcs for the struct fields. This
1605 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1608 #define le8_to_cpu(v) (v)
1609 #define cpu_to_le8(v) (v)
1612 #define read_eb_member(eb, ptr, type, member, result) ( \
1613 read_extent_buffer(eb, (char *)(result), \
1614 ((unsigned long)(ptr)) + \
1615 offsetof(type, member), \
1616 sizeof(((type *)0)->member)))
1618 #define write_eb_member(eb, ptr, type, member, result) ( \
1619 write_extent_buffer(eb, (char *)(result), \
1620 ((unsigned long)(ptr)) + \
1621 offsetof(type, member), \
1622 sizeof(((type *)0)->member)))
1624 #ifndef BTRFS_SETGET_FUNCS
1625 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1626 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1627 u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, struct btrfs_map_token *token); \
1628 void btrfs_set_token_##name(struct extent_buffer *eb, type *s, u##bits val, struct btrfs_map_token *token);\
1629 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1632 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1633 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1635 type *p = page_address(eb->pages[0]); \
1636 u##bits res = le##bits##_to_cpu(p->member); \
1639 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1642 type *p = page_address(eb->pages[0]); \
1643 p->member = cpu_to_le##bits(val); \
1646 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1647 static inline u##bits btrfs_##name(type *s) \
1649 return le##bits##_to_cpu(s->member); \
1651 static inline void btrfs_set_##name(type *s, u##bits val) \
1653 s->member = cpu_to_le##bits(val); \
1656 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1657 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1658 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1659 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1660 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1661 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1663 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1664 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1665 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1666 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1667 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1668 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1670 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1671 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1673 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1675 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1677 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1679 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1681 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1682 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1684 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1686 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1688 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1691 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1693 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1696 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1698 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1701 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1702 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1703 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1704 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1705 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1706 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1707 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1708 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1709 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1710 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1711 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1713 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1715 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1718 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1719 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1720 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1722 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1724 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1726 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1728 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1729 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1731 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1733 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1734 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1736 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1739 unsigned long offset
= (unsigned long)c
;
1740 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1741 offset
+= nr
* sizeof(struct btrfs_stripe
);
1742 return (struct btrfs_stripe
*)offset
;
1745 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1747 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1750 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1751 struct btrfs_chunk
*c
, int nr
)
1753 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1756 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1757 struct btrfs_chunk
*c
, int nr
)
1759 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1762 /* struct btrfs_block_group_item */
1763 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1765 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1767 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1768 struct btrfs_block_group_item
, chunk_objectid
, 64);
1770 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1771 struct btrfs_block_group_item
, chunk_objectid
, 64);
1772 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1773 struct btrfs_block_group_item
, flags
, 64);
1774 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1775 struct btrfs_block_group_item
, flags
, 64);
1777 /* struct btrfs_inode_ref */
1778 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1779 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1781 /* struct btrfs_inode_item */
1782 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1783 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1784 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1785 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1786 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1787 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1788 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1789 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1790 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1791 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1792 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1793 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1795 static inline struct btrfs_timespec
*
1796 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1798 unsigned long ptr
= (unsigned long)inode_item
;
1799 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1800 return (struct btrfs_timespec
*)ptr
;
1803 static inline struct btrfs_timespec
*
1804 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1806 unsigned long ptr
= (unsigned long)inode_item
;
1807 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1808 return (struct btrfs_timespec
*)ptr
;
1811 static inline struct btrfs_timespec
*
1812 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1814 unsigned long ptr
= (unsigned long)inode_item
;
1815 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1816 return (struct btrfs_timespec
*)ptr
;
1819 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1820 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1822 /* struct btrfs_dev_extent */
1823 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1825 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1826 chunk_objectid
, 64);
1827 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1829 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1831 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1833 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1834 return (u8
*)((unsigned long)dev
+ ptr
);
1837 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1838 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1840 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1842 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1845 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1847 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1848 struct btrfs_tree_block_info
*item
,
1849 struct btrfs_disk_key
*key
)
1851 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1854 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1855 struct btrfs_tree_block_info
*item
,
1856 struct btrfs_disk_key
*key
)
1858 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1861 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1863 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1865 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1867 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1870 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1873 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1875 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1878 static inline u32
btrfs_extent_inline_ref_size(int type
)
1880 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1881 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1882 return sizeof(struct btrfs_extent_inline_ref
);
1883 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1884 return sizeof(struct btrfs_shared_data_ref
) +
1885 sizeof(struct btrfs_extent_inline_ref
);
1886 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1887 return sizeof(struct btrfs_extent_data_ref
) +
1888 offsetof(struct btrfs_extent_inline_ref
, offset
);
1893 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1894 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1896 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1897 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1899 /* struct btrfs_node */
1900 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1901 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1903 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1906 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1907 sizeof(struct btrfs_key_ptr
) * nr
;
1908 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1911 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1915 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1916 sizeof(struct btrfs_key_ptr
) * nr
;
1917 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1920 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1923 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1924 sizeof(struct btrfs_key_ptr
) * nr
;
1925 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1928 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1932 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1933 sizeof(struct btrfs_key_ptr
) * nr
;
1934 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1937 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1939 return offsetof(struct btrfs_node
, ptrs
) +
1940 sizeof(struct btrfs_key_ptr
) * nr
;
1943 void btrfs_node_key(struct extent_buffer
*eb
,
1944 struct btrfs_disk_key
*disk_key
, int nr
);
1946 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1947 struct btrfs_disk_key
*disk_key
, int nr
)
1950 ptr
= btrfs_node_key_ptr_offset(nr
);
1951 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1952 struct btrfs_key_ptr
, key
, disk_key
);
1955 /* struct btrfs_item */
1956 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1957 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1959 static inline unsigned long btrfs_item_nr_offset(int nr
)
1961 return offsetof(struct btrfs_leaf
, items
) +
1962 sizeof(struct btrfs_item
) * nr
;
1965 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1968 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1971 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1972 struct btrfs_item
*item
)
1974 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1977 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1979 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1982 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1984 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1987 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1989 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1992 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1993 struct btrfs_disk_key
*disk_key
, int nr
)
1995 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1996 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1999 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
2000 struct btrfs_disk_key
*disk_key
, int nr
)
2002 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
2003 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2006 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
2009 * struct btrfs_root_ref
2011 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
2012 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
2013 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
2015 /* struct btrfs_dir_item */
2016 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2017 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2018 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2019 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2021 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
2022 struct btrfs_dir_item
*item
,
2023 struct btrfs_disk_key
*key
)
2025 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2028 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2029 struct btrfs_dir_item
*item
,
2030 struct btrfs_disk_key
*key
)
2032 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2035 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2037 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2039 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2042 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
2043 struct btrfs_free_space_header
*h
,
2044 struct btrfs_disk_key
*key
)
2046 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2049 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2050 struct btrfs_free_space_header
*h
,
2051 struct btrfs_disk_key
*key
)
2053 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2056 /* struct btrfs_disk_key */
2057 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2059 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2060 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2062 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2063 struct btrfs_disk_key
*disk
)
2065 cpu
->offset
= le64_to_cpu(disk
->offset
);
2066 cpu
->type
= disk
->type
;
2067 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2070 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2071 struct btrfs_key
*cpu
)
2073 disk
->offset
= cpu_to_le64(cpu
->offset
);
2074 disk
->type
= cpu
->type
;
2075 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2078 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2079 struct btrfs_key
*key
, int nr
)
2081 struct btrfs_disk_key disk_key
;
2082 btrfs_node_key(eb
, &disk_key
, nr
);
2083 btrfs_disk_key_to_cpu(key
, &disk_key
);
2086 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2087 struct btrfs_key
*key
, int nr
)
2089 struct btrfs_disk_key disk_key
;
2090 btrfs_item_key(eb
, &disk_key
, nr
);
2091 btrfs_disk_key_to_cpu(key
, &disk_key
);
2094 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2095 struct btrfs_dir_item
*item
,
2096 struct btrfs_key
*key
)
2098 struct btrfs_disk_key disk_key
;
2099 btrfs_dir_item_key(eb
, item
, &disk_key
);
2100 btrfs_disk_key_to_cpu(key
, &disk_key
);
2104 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2109 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2114 /* struct btrfs_header */
2115 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2116 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2118 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2119 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2120 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2121 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2123 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2125 return (btrfs_header_flags(eb
) & flag
) == flag
;
2128 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2130 u64 flags
= btrfs_header_flags(eb
);
2131 btrfs_set_header_flags(eb
, flags
| flag
);
2132 return (flags
& flag
) == flag
;
2135 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2137 u64 flags
= btrfs_header_flags(eb
);
2138 btrfs_set_header_flags(eb
, flags
& ~flag
);
2139 return (flags
& flag
) == flag
;
2142 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2144 u64 flags
= btrfs_header_flags(eb
);
2145 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2148 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2151 u64 flags
= btrfs_header_flags(eb
);
2152 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2153 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2154 btrfs_set_header_flags(eb
, flags
);
2157 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
2159 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
2163 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2165 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
2169 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2171 return btrfs_header_level(eb
) == 0;
2174 /* struct btrfs_root_item */
2175 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2177 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2178 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2179 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2181 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2183 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2184 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2185 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2186 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2187 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2188 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2189 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2190 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2193 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2195 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2198 /* struct btrfs_root_backup */
2199 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2201 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2203 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2204 tree_root_level
, 8);
2206 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2208 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2209 chunk_root_gen
, 64);
2210 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2211 chunk_root_level
, 8);
2213 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2215 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2216 extent_root_gen
, 64);
2217 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2218 extent_root_level
, 8);
2220 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2222 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2224 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2227 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2229 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2231 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2234 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2236 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2238 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2239 csum_root_level
, 8);
2240 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2242 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2244 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2247 /* struct btrfs_balance_item */
2248 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2250 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2251 struct btrfs_balance_item
*bi
,
2252 struct btrfs_disk_balance_args
*ba
)
2254 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2257 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2258 struct btrfs_balance_item
*bi
,
2259 struct btrfs_disk_balance_args
*ba
)
2261 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2264 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2265 struct btrfs_balance_item
*bi
,
2266 struct btrfs_disk_balance_args
*ba
)
2268 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2271 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2272 struct btrfs_balance_item
*bi
,
2273 struct btrfs_disk_balance_args
*ba
)
2275 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2278 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2279 struct btrfs_balance_item
*bi
,
2280 struct btrfs_disk_balance_args
*ba
)
2282 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2285 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2286 struct btrfs_balance_item
*bi
,
2287 struct btrfs_disk_balance_args
*ba
)
2289 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2293 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2294 struct btrfs_disk_balance_args
*disk
)
2296 memset(cpu
, 0, sizeof(*cpu
));
2298 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2299 cpu
->usage
= le64_to_cpu(disk
->usage
);
2300 cpu
->devid
= le64_to_cpu(disk
->devid
);
2301 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2302 cpu
->pend
= le64_to_cpu(disk
->pend
);
2303 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2304 cpu
->vend
= le64_to_cpu(disk
->vend
);
2305 cpu
->target
= le64_to_cpu(disk
->target
);
2306 cpu
->flags
= le64_to_cpu(disk
->flags
);
2310 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2311 struct btrfs_balance_args
*cpu
)
2313 memset(disk
, 0, sizeof(*disk
));
2315 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2316 disk
->usage
= cpu_to_le64(cpu
->usage
);
2317 disk
->devid
= cpu_to_le64(cpu
->devid
);
2318 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2319 disk
->pend
= cpu_to_le64(cpu
->pend
);
2320 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2321 disk
->vend
= cpu_to_le64(cpu
->vend
);
2322 disk
->target
= cpu_to_le64(cpu
->target
);
2323 disk
->flags
= cpu_to_le64(cpu
->flags
);
2326 /* struct btrfs_super_block */
2327 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2328 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2329 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2331 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2332 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2333 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2334 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2335 struct btrfs_super_block
, chunk_root_generation
, 64);
2336 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2338 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2340 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2341 chunk_root_level
, 8);
2342 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2344 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2345 log_root_transid
, 64);
2346 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2348 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2350 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2352 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2354 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2356 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2358 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2360 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2361 root_dir_objectid
, 64);
2362 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2364 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2366 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2367 compat_ro_flags
, 64);
2368 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2369 incompat_flags
, 64);
2370 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2372 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2373 cache_generation
, 64);
2375 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2377 int t
= btrfs_super_csum_type(s
);
2378 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2379 return btrfs_csum_sizes
[t
];
2382 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2384 return offsetof(struct btrfs_leaf
, items
);
2387 /* struct btrfs_file_extent_item */
2388 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2390 static inline unsigned long
2391 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2393 unsigned long offset
= (unsigned long)e
;
2394 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2398 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2400 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2403 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2405 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2407 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2408 disk_num_bytes
, 64);
2409 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2411 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2413 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2415 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2417 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2419 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2420 other_encoding
, 16);
2422 /* this returns the number of file bytes represented by the inline item.
2423 * If an item is compressed, this is the uncompressed size
2425 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2426 struct btrfs_file_extent_item
*e
)
2428 return btrfs_file_extent_ram_bytes(eb
, e
);
2432 * this returns the number of bytes used by the item on disk, minus the
2433 * size of any extent headers. If a file is compressed on disk, this is
2434 * the compressed size
2436 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2437 struct btrfs_item
*e
)
2439 unsigned long offset
;
2440 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2441 return btrfs_item_size(eb
, e
) - offset
;
2444 /* btrfs_dev_stats_item */
2445 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
2446 struct btrfs_dev_stats_item
*ptr
,
2451 read_extent_buffer(eb
, &val
,
2452 offsetof(struct btrfs_dev_stats_item
, values
) +
2453 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2458 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2459 struct btrfs_dev_stats_item
*ptr
,
2462 write_extent_buffer(eb
, &val
,
2463 offsetof(struct btrfs_dev_stats_item
, values
) +
2464 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2468 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
2470 return sb
->s_fs_info
;
2473 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2476 return root
->leafsize
;
2477 return root
->nodesize
;
2480 /* helper function to cast into the data area of the leaf. */
2481 #define btrfs_item_ptr(leaf, slot, type) \
2482 ((type *)(btrfs_leaf_data(leaf) + \
2483 btrfs_item_offset_nr(leaf, slot)))
2485 #define btrfs_item_ptr_offset(leaf, slot) \
2486 ((unsigned long)(btrfs_leaf_data(leaf) + \
2487 btrfs_item_offset_nr(leaf, slot)))
2489 static inline struct dentry
*fdentry(struct file
*file
)
2491 return file
->f_path
.dentry
;
2494 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2496 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2497 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2500 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2502 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
2506 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2509 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2514 * Doing a truncate won't result in new nodes or leaves, just what we need for
2517 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2520 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2524 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2525 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2526 struct btrfs_root
*root
, unsigned long count
);
2527 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2528 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2529 struct btrfs_root
*root
, u64 bytenr
,
2530 u64 num_bytes
, u64
*refs
, u64
*flags
);
2531 int btrfs_pin_extent(struct btrfs_root
*root
,
2532 u64 bytenr
, u64 num
, int reserved
);
2533 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle
*trans
,
2534 struct btrfs_root
*root
,
2535 u64 bytenr
, u64 num_bytes
);
2536 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2537 struct btrfs_root
*root
,
2538 u64 objectid
, u64 offset
, u64 bytenr
);
2539 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2540 struct btrfs_fs_info
*info
,
2542 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2543 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2544 u64 search_start
, u64 search_hint
, int owner
);
2545 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2546 struct btrfs_root
*root
, u32 blocksize
,
2547 u64 parent
, u64 root_objectid
,
2548 struct btrfs_disk_key
*key
, int level
,
2549 u64 hint
, u64 empty_size
);
2550 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2551 struct btrfs_root
*root
,
2552 struct extent_buffer
*buf
,
2553 u64 parent
, int last_ref
);
2554 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2555 struct btrfs_root
*root
,
2556 u64 bytenr
, u32 blocksize
,
2558 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2559 struct btrfs_root
*root
,
2560 u64 root_objectid
, u64 owner
,
2561 u64 offset
, struct btrfs_key
*ins
);
2562 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2563 struct btrfs_root
*root
,
2564 u64 root_objectid
, u64 owner
, u64 offset
,
2565 struct btrfs_key
*ins
);
2566 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2567 struct btrfs_root
*root
,
2568 u64 num_bytes
, u64 min_alloc_size
,
2569 u64 empty_size
, u64 hint_byte
,
2570 struct btrfs_key
*ins
, u64 data
);
2571 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2572 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
2573 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2574 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
2575 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2576 struct btrfs_root
*root
,
2577 u64 bytenr
, u64 num_bytes
, u64 flags
,
2579 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2580 struct btrfs_root
*root
,
2581 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
2582 u64 owner
, u64 offset
, int for_cow
);
2584 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2585 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
2586 u64 start
, u64 len
);
2587 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2588 struct btrfs_root
*root
);
2589 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2590 struct btrfs_root
*root
);
2591 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2592 struct btrfs_root
*root
,
2593 u64 bytenr
, u64 num_bytes
, u64 parent
,
2594 u64 root_objectid
, u64 owner
, u64 offset
, int for_cow
);
2596 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2597 struct btrfs_root
*root
);
2598 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2599 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2600 int btrfs_read_block_groups(struct btrfs_root
*root
);
2601 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2602 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2603 struct btrfs_root
*root
, u64 bytes_used
,
2604 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2606 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2607 struct btrfs_root
*root
, u64 group_start
);
2608 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2609 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2610 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2611 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2612 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
2613 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
2614 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2615 struct btrfs_root
*root
);
2616 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2617 struct inode
*inode
);
2618 void btrfs_orphan_release_metadata(struct inode
*inode
);
2619 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
2620 struct btrfs_pending_snapshot
*pending
);
2621 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2622 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2623 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
2624 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
2625 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2626 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2627 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2628 struct btrfs_block_rsv
*rsv
);
2629 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2630 struct btrfs_block_rsv
*block_rsv
,
2632 int btrfs_block_rsv_add_noflush(struct btrfs_root
*root
,
2633 struct btrfs_block_rsv
*block_rsv
,
2635 int btrfs_block_rsv_check(struct btrfs_root
*root
,
2636 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2637 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2638 struct btrfs_block_rsv
*block_rsv
,
2640 int btrfs_block_rsv_refill_noflush(struct btrfs_root
*root
,
2641 struct btrfs_block_rsv
*block_rsv
,
2643 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2644 struct btrfs_block_rsv
*dst_rsv
,
2646 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2647 struct btrfs_block_rsv
*block_rsv
,
2649 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2650 struct btrfs_block_group_cache
*cache
);
2651 void btrfs_set_block_group_rw(struct btrfs_root
*root
,
2652 struct btrfs_block_group_cache
*cache
);
2653 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2654 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2655 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2656 u64 start
, u64 end
);
2657 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2658 u64 num_bytes
, u64
*actual_bytes
);
2659 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2660 struct btrfs_root
*root
, u64 type
);
2661 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
2663 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2665 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2666 int level
, int *slot
);
2667 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2668 int btrfs_previous_item(struct btrfs_root
*root
,
2669 struct btrfs_path
*path
, u64 min_objectid
,
2671 void btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2672 struct btrfs_root
*root
, struct btrfs_path
*path
,
2673 struct btrfs_key
*new_key
);
2674 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2675 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2676 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2677 struct btrfs_key
*key
, int lowest_level
,
2678 int cache_only
, u64 min_trans
);
2679 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2680 struct btrfs_key
*max_key
,
2681 struct btrfs_path
*path
, int cache_only
,
2683 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2684 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2685 struct extent_buffer
*parent
, int parent_slot
,
2686 struct extent_buffer
**cow_ret
);
2687 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2688 struct btrfs_root
*root
,
2689 struct extent_buffer
*buf
,
2690 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2691 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2692 struct extent_buffer
*buf
);
2693 void btrfs_extend_item(struct btrfs_trans_handle
*trans
,
2694 struct btrfs_root
*root
, struct btrfs_path
*path
,
2696 void btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2697 struct btrfs_root
*root
,
2698 struct btrfs_path
*path
,
2699 u32 new_size
, int from_end
);
2700 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2701 struct btrfs_root
*root
,
2702 struct btrfs_path
*path
,
2703 struct btrfs_key
*new_key
,
2704 unsigned long split_offset
);
2705 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2706 struct btrfs_root
*root
,
2707 struct btrfs_path
*path
,
2708 struct btrfs_key
*new_key
);
2709 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2710 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2712 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
2713 struct btrfs_path
*p
, u64 time_seq
);
2714 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2715 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2716 int start_slot
, int cache_only
, u64
*last_ret
,
2717 struct btrfs_key
*progress
);
2718 void btrfs_release_path(struct btrfs_path
*p
);
2719 struct btrfs_path
*btrfs_alloc_path(void);
2720 void btrfs_free_path(struct btrfs_path
*p
);
2721 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2722 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2723 struct extent_buffer
*held
, int held_rw
);
2724 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2726 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2727 struct btrfs_path
*path
, int slot
, int nr
);
2728 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2729 struct btrfs_root
*root
,
2730 struct btrfs_path
*path
)
2732 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2735 void setup_items_for_insert(struct btrfs_trans_handle
*trans
,
2736 struct btrfs_root
*root
, struct btrfs_path
*path
,
2737 struct btrfs_key
*cpu_key
, u32
*data_size
,
2738 u32 total_data
, u32 total_size
, int nr
);
2739 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2740 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2741 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2742 struct btrfs_root
*root
,
2743 struct btrfs_path
*path
,
2744 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2746 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2747 struct btrfs_root
*root
,
2748 struct btrfs_path
*path
,
2749 struct btrfs_key
*key
,
2752 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2755 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2756 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
2759 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2760 return btrfs_next_leaf(root
, p
);
2763 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2764 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2765 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
2766 struct btrfs_block_rsv
*block_rsv
,
2767 int update_ref
, int for_reloc
);
2768 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2769 struct btrfs_root
*root
,
2770 struct extent_buffer
*node
,
2771 struct extent_buffer
*parent
);
2772 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2775 * Get synced with close_ctree()
2778 return fs_info
->closing
;
2780 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
2782 kfree(fs_info
->balance_ctl
);
2783 kfree(fs_info
->delayed_root
);
2784 kfree(fs_info
->extent_root
);
2785 kfree(fs_info
->tree_root
);
2786 kfree(fs_info
->chunk_root
);
2787 kfree(fs_info
->dev_root
);
2788 kfree(fs_info
->csum_root
);
2789 kfree(fs_info
->super_copy
);
2790 kfree(fs_info
->super_for_commit
);
2795 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2796 struct btrfs_path
*path
,
2797 u64 root_id
, u64 ref_id
);
2798 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2799 struct btrfs_root
*tree_root
,
2800 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2801 const char *name
, int name_len
);
2802 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2803 struct btrfs_root
*tree_root
,
2804 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2805 const char *name
, int name_len
);
2806 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2807 struct btrfs_key
*key
);
2808 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2809 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2811 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
2812 struct btrfs_root
*root
,
2813 struct btrfs_key
*key
,
2814 struct btrfs_root_item
*item
);
2815 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2816 btrfs_root_item
*item
, struct btrfs_key
*key
);
2817 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2818 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2819 void btrfs_set_root_node(struct btrfs_root_item
*item
,
2820 struct extent_buffer
*node
);
2821 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2824 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2825 struct btrfs_root
*root
, const char *name
,
2826 int name_len
, struct inode
*dir
,
2827 struct btrfs_key
*location
, u8 type
, u64 index
);
2828 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2829 struct btrfs_root
*root
,
2830 struct btrfs_path
*path
, u64 dir
,
2831 const char *name
, int name_len
,
2833 struct btrfs_dir_item
*
2834 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2835 struct btrfs_root
*root
,
2836 struct btrfs_path
*path
, u64 dir
,
2837 u64 objectid
, const char *name
, int name_len
,
2839 struct btrfs_dir_item
*
2840 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2841 struct btrfs_path
*path
, u64 dirid
,
2842 const char *name
, int name_len
);
2843 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2844 struct btrfs_path
*path
,
2845 const char *name
, int name_len
);
2846 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2847 struct btrfs_root
*root
,
2848 struct btrfs_path
*path
,
2849 struct btrfs_dir_item
*di
);
2850 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2851 struct btrfs_root
*root
,
2852 struct btrfs_path
*path
, u64 objectid
,
2853 const char *name
, u16 name_len
,
2854 const void *data
, u16 data_len
);
2855 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2856 struct btrfs_root
*root
,
2857 struct btrfs_path
*path
, u64 dir
,
2858 const char *name
, u16 name_len
,
2860 int verify_dir_item(struct btrfs_root
*root
,
2861 struct extent_buffer
*leaf
,
2862 struct btrfs_dir_item
*dir_item
);
2865 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2866 struct btrfs_root
*root
, u64 offset
);
2867 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2868 struct btrfs_root
*root
, u64 offset
);
2869 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2872 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2873 struct btrfs_root
*root
,
2874 const char *name
, int name_len
,
2875 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2876 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2877 struct btrfs_root
*root
,
2878 const char *name
, int name_len
,
2879 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2880 struct btrfs_inode_ref
*
2881 btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2882 struct btrfs_root
*root
,
2883 struct btrfs_path
*path
,
2884 const char *name
, int name_len
,
2885 u64 inode_objectid
, u64 ref_objectid
, int mod
);
2886 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2887 struct btrfs_root
*root
,
2888 struct btrfs_path
*path
, u64 objectid
);
2889 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2890 *root
, struct btrfs_path
*path
,
2891 struct btrfs_key
*location
, int mod
);
2894 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2895 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2896 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2897 struct bio
*bio
, u32
*dst
);
2898 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
2899 struct bio
*bio
, u64 logical_offset
, u32
*dst
);
2900 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2901 struct btrfs_root
*root
,
2902 u64 objectid
, u64 pos
,
2903 u64 disk_offset
, u64 disk_num_bytes
,
2904 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2905 u8 compression
, u8 encryption
, u16 other_encoding
);
2906 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2907 struct btrfs_root
*root
,
2908 struct btrfs_path
*path
, u64 objectid
,
2909 u64 bytenr
, int mod
);
2910 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2911 struct btrfs_root
*root
,
2912 struct btrfs_ordered_sum
*sums
);
2913 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2914 struct bio
*bio
, u64 file_start
, int contig
);
2915 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2916 struct btrfs_root
*root
,
2917 struct btrfs_path
*path
,
2918 u64 bytenr
, int cow
);
2919 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2920 struct btrfs_root
*root
, struct btrfs_path
*path
,
2922 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
2923 struct list_head
*list
, int search_commit
);
2925 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
2926 size_t pg_offset
, u64 start
, u64 len
,
2929 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2930 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2931 #define ClearPageChecked ClearPageFsMisc
2932 #define SetPageChecked SetPageFsMisc
2933 #define PageChecked PageFsMisc
2936 /* This forces readahead on a given range of bytes in an inode */
2937 static inline void btrfs_force_ra(struct address_space
*mapping
,
2938 struct file_ra_state
*ra
, struct file
*file
,
2939 pgoff_t offset
, unsigned long req_size
)
2941 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
2944 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2945 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2946 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2947 struct btrfs_root
*root
,
2948 struct inode
*dir
, struct inode
*inode
,
2949 const char *name
, int name_len
);
2950 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2951 struct inode
*parent_inode
, struct inode
*inode
,
2952 const char *name
, int name_len
, int add_backref
, u64 index
);
2953 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2954 struct btrfs_root
*root
,
2955 struct inode
*dir
, u64 objectid
,
2956 const char *name
, int name_len
);
2957 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2958 struct btrfs_root
*root
,
2959 struct inode
*inode
, u64 new_size
,
2962 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2963 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
2964 struct extent_state
**cached_state
);
2965 int btrfs_writepages(struct address_space
*mapping
,
2966 struct writeback_control
*wbc
);
2967 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2968 struct btrfs_root
*new_root
, u64 new_dirid
);
2969 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2970 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2972 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2973 int btrfs_readpage(struct file
*file
, struct page
*page
);
2974 void btrfs_evict_inode(struct inode
*inode
);
2975 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
2976 int btrfs_dirty_inode(struct inode
*inode
);
2977 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2978 void btrfs_destroy_inode(struct inode
*inode
);
2979 int btrfs_drop_inode(struct inode
*inode
);
2980 int btrfs_init_cachep(void);
2981 void btrfs_destroy_cachep(void);
2982 long btrfs_ioctl_trans_end(struct file
*file
);
2983 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2984 struct btrfs_root
*root
, int *was_new
);
2985 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2986 size_t pg_offset
, u64 start
, u64 end
,
2988 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2989 struct btrfs_root
*root
,
2990 struct inode
*inode
);
2991 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2992 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2993 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
2994 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
2995 struct btrfs_root
*root
);
2996 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
2997 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
2998 void btrfs_add_delayed_iput(struct inode
*inode
);
2999 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3000 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3001 u64 start
, u64 num_bytes
, u64 min_size
,
3002 loff_t actual_len
, u64
*alloc_hint
);
3003 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3004 struct btrfs_trans_handle
*trans
, int mode
,
3005 u64 start
, u64 num_bytes
, u64 min_size
,
3006 loff_t actual_len
, u64
*alloc_hint
);
3007 extern const struct dentry_operations btrfs_dentry_operations
;
3010 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3011 void btrfs_update_iflags(struct inode
*inode
);
3012 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3013 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3014 struct btrfs_ioctl_defrag_range_args
*range
,
3015 u64 newer_than
, unsigned long max_pages
);
3017 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3018 struct inode
*inode
);
3019 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3020 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3021 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3023 extern const struct file_operations btrfs_file_operations
;
3024 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
3025 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
3026 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3027 struct inode
*inode
, u64 start
, u64 end
);
3028 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3029 void btrfs_drop_pages(struct page
**pages
, size_t num_pages
);
3030 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3031 struct page
**pages
, size_t num_pages
,
3032 loff_t pos
, size_t write_bytes
,
3033 struct extent_state
**cached
);
3036 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3037 struct btrfs_root
*root
, int cache_only
);
3040 int btrfs_init_sysfs(void);
3041 void btrfs_exit_sysfs(void);
3044 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3047 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
3048 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3049 void btrfs_printk(struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3050 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3051 unsigned int line
, int errno
, const char *fmt
, ...);
3053 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3054 struct btrfs_root
*root
, const char *function
,
3055 unsigned int line
, int errno
);
3057 #define btrfs_abort_transaction(trans, root, errno) \
3059 __btrfs_abort_transaction(trans, root, __func__, \
3063 #define btrfs_std_error(fs_info, errno) \
3066 __btrfs_std_error((fs_info), __func__, \
3067 __LINE__, (errno), NULL); \
3070 #define btrfs_error(fs_info, errno, fmt, args...) \
3072 __btrfs_std_error((fs_info), __func__, __LINE__, \
3073 (errno), fmt, ##args); \
3076 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3077 unsigned int line
, int errno
, const char *fmt
, ...);
3079 #define btrfs_panic(fs_info, errno, fmt, args...) \
3081 struct btrfs_fs_info *_i = (fs_info); \
3082 __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
3083 BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
3087 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3088 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3089 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3090 struct inode
*inode
, struct inode
*dir
);
3091 int btrfs_acl_chmod(struct inode
*inode
);
3093 #define btrfs_get_acl NULL
3094 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3095 struct inode
*inode
, struct inode
*dir
)
3099 static inline int btrfs_acl_chmod(struct inode
*inode
)
3106 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3107 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3108 struct btrfs_root
*root
);
3109 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3110 struct btrfs_root
*root
);
3111 int btrfs_recover_relocation(struct btrfs_root
*root
);
3112 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3113 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3114 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3115 struct extent_buffer
*cow
);
3116 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
3117 struct btrfs_pending_snapshot
*pending
,
3118 u64
*bytes_to_reserve
);
3119 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3120 struct btrfs_pending_snapshot
*pending
);
3123 int btrfs_scrub_dev(struct btrfs_root
*root
, u64 devid
, u64 start
, u64 end
,
3124 struct btrfs_scrub_progress
*progress
, int readonly
);
3125 void btrfs_scrub_pause(struct btrfs_root
*root
);
3126 void btrfs_scrub_pause_super(struct btrfs_root
*root
);
3127 void btrfs_scrub_continue(struct btrfs_root
*root
);
3128 void btrfs_scrub_continue_super(struct btrfs_root
*root
);
3129 int __btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3130 int btrfs_scrub_cancel(struct btrfs_root
*root
);
3131 int btrfs_scrub_cancel_dev(struct btrfs_root
*root
, struct btrfs_device
*dev
);
3132 int btrfs_scrub_cancel_devid(struct btrfs_root
*root
, u64 devid
);
3133 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
3134 struct btrfs_scrub_progress
*progress
);
3137 struct reada_control
{
3138 struct btrfs_root
*root
; /* tree to prefetch */
3139 struct btrfs_key key_start
;
3140 struct btrfs_key key_end
; /* exclusive */
3143 wait_queue_head_t wait
;
3145 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3146 struct btrfs_key
*start
, struct btrfs_key
*end
);
3147 int btrfs_reada_wait(void *handle
);
3148 void btrfs_reada_detach(void *handle
);
3149 int btree_readahead_hook(struct btrfs_root
*root
, struct extent_buffer
*eb
,
3150 u64 start
, int err
);
3152 /* delayed seq elem */
3154 struct list_head list
;
3159 void btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3160 struct seq_list
*elem
);
3161 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3162 struct seq_list
*elem
);
3164 static inline int is_fstree(u64 rootid
)
3166 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3167 (s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
)