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
177 * The key defines the order in the tree, and so it also defines (optimal)
180 * objectid corresponds to the inode number.
182 * type tells us things about the object, and is a kind of stream selector.
183 * so for a given inode, keys with type of 1 might refer to the inode data,
184 * type of 2 may point to file data in the btree and type == 3 may point to
187 * offset is the starting byte offset for this key in the stream.
189 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
190 * in cpu native order. Otherwise they are identical and their sizes
191 * should be the same (ie both packed)
193 struct btrfs_disk_key
{
197 } __attribute__ ((__packed__
));
203 } __attribute__ ((__packed__
));
205 struct btrfs_mapping_tree
{
206 struct extent_map_tree map_tree
;
209 struct btrfs_dev_item
{
210 /* the internal btrfs device id */
213 /* size of the device */
219 /* optimal io alignment for this device */
222 /* optimal io width for this device */
225 /* minimal io size for this device */
228 /* type and info about this device */
231 /* expected generation for this device */
235 * starting byte of this partition on the device,
236 * to allow for stripe alignment in the future
240 /* grouping information for allocation decisions */
243 /* seek speed 0-100 where 100 is fastest */
246 /* bandwidth 0-100 where 100 is fastest */
249 /* btrfs generated uuid for this device */
250 u8 uuid
[BTRFS_UUID_SIZE
];
252 /* uuid of FS who owns this device */
253 u8 fsid
[BTRFS_UUID_SIZE
];
254 } __attribute__ ((__packed__
));
256 struct btrfs_stripe
{
259 u8 dev_uuid
[BTRFS_UUID_SIZE
];
260 } __attribute__ ((__packed__
));
263 /* size of this chunk in bytes */
266 /* objectid of the root referencing this chunk */
272 /* optimal io alignment for this chunk */
275 /* optimal io width for this chunk */
278 /* minimal io size for this chunk */
281 /* 2^16 stripes is quite a lot, a second limit is the size of a single
286 /* sub stripes only matter for raid10 */
288 struct btrfs_stripe stripe
;
289 /* additional stripes go here */
290 } __attribute__ ((__packed__
));
292 #define BTRFS_FREE_SPACE_EXTENT 1
293 #define BTRFS_FREE_SPACE_BITMAP 2
295 struct btrfs_free_space_entry
{
299 } __attribute__ ((__packed__
));
301 struct btrfs_free_space_header
{
302 struct btrfs_disk_key location
;
306 } __attribute__ ((__packed__
));
308 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
310 BUG_ON(num_stripes
== 0);
311 return sizeof(struct btrfs_chunk
) +
312 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
315 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
316 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
322 /* Errors detected */
323 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
325 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
326 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
328 #define BTRFS_BACKREF_REV_MAX 256
329 #define BTRFS_BACKREF_REV_SHIFT 56
330 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
331 BTRFS_BACKREF_REV_SHIFT)
333 #define BTRFS_OLD_BACKREF_REV 0
334 #define BTRFS_MIXED_BACKREF_REV 1
337 * every tree block (leaf or node) starts with this header.
339 struct btrfs_header
{
340 /* these first four must match the super block */
341 u8 csum
[BTRFS_CSUM_SIZE
];
342 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
343 __le64 bytenr
; /* which block this node is supposed to live in */
346 /* allowed to be different from the super from here on down */
347 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
352 } __attribute__ ((__packed__
));
354 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
355 sizeof(struct btrfs_header)) / \
356 sizeof(struct btrfs_key_ptr))
357 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
358 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
359 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
360 sizeof(struct btrfs_item) - \
361 sizeof(struct btrfs_file_extent_item))
362 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
363 sizeof(struct btrfs_item) -\
364 sizeof(struct btrfs_dir_item))
368 * this is a very generous portion of the super block, giving us
369 * room to translate 14 chunks with 3 stripes each.
371 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
372 #define BTRFS_LABEL_SIZE 256
375 * just in case we somehow lose the roots and are not able to mount,
376 * we store an array of the roots from previous transactions
379 #define BTRFS_NUM_BACKUP_ROOTS 4
380 struct btrfs_root_backup
{
382 __le64 tree_root_gen
;
385 __le64 chunk_root_gen
;
388 __le64 extent_root_gen
;
397 __le64 csum_root_gen
;
407 u8 extent_root_level
;
411 /* future and to align */
413 } __attribute__ ((__packed__
));
416 * the super block basically lists the main trees of the FS
417 * it currently lacks any block count etc etc
419 struct btrfs_super_block
{
420 u8 csum
[BTRFS_CSUM_SIZE
];
421 /* the first 4 fields must match struct btrfs_header */
422 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
423 __le64 bytenr
; /* this block number */
426 /* allowed to be different from the btrfs_header from here own down */
433 /* this will help find the new super based on the log root */
434 __le64 log_root_transid
;
437 __le64 root_dir_objectid
;
443 __le32 sys_chunk_array_size
;
444 __le64 chunk_root_generation
;
446 __le64 compat_ro_flags
;
447 __le64 incompat_flags
;
452 struct btrfs_dev_item dev_item
;
454 char label
[BTRFS_LABEL_SIZE
];
456 __le64 cache_generation
;
458 /* future expansion */
460 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
461 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
462 } __attribute__ ((__packed__
));
465 * Compat flags that we support. If any incompat flags are set other than the
466 * ones specified below then we will fail to mount
468 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
469 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
470 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
471 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
473 * some patches floated around with a second compression method
474 * lets save that incompat here for when they do get in
475 * Note we don't actually support it, we're just reserving the
478 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
481 * older kernels tried to do bigger metadata blocks, but the
482 * code was pretty buggy. Lets not let them try anymore.
484 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
486 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
487 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
488 #define BTRFS_FEATURE_INCOMPAT_SUPP \
489 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
490 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
491 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
492 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
493 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
496 * A leaf is full of items. offset and size tell us where to find
497 * the item in the leaf (relative to the start of the data area)
500 struct btrfs_disk_key key
;
503 } __attribute__ ((__packed__
));
506 * leaves have an item area and a data area:
507 * [item0, item1....itemN] [free space] [dataN...data1, data0]
509 * The data is separate from the items to get the keys closer together
513 struct btrfs_header header
;
514 struct btrfs_item items
[];
515 } __attribute__ ((__packed__
));
518 * all non-leaf blocks are nodes, they hold only keys and pointers to
521 struct btrfs_key_ptr
{
522 struct btrfs_disk_key key
;
525 } __attribute__ ((__packed__
));
528 struct btrfs_header header
;
529 struct btrfs_key_ptr ptrs
[];
530 } __attribute__ ((__packed__
));
533 * btrfs_paths remember the path taken from the root down to the leaf.
534 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
535 * to any other levels that are present.
537 * The slots array records the index of the item or block pointer
538 * used while walking the tree.
541 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
542 int slots
[BTRFS_MAX_LEVEL
];
543 /* if there is real range locking, this locks field will change */
544 int locks
[BTRFS_MAX_LEVEL
];
546 /* keep some upper locks as we walk down */
550 * set by btrfs_split_item, tells search_slot to keep all locks
551 * and to force calls to keep space in the nodes
553 unsigned int search_for_split
:1;
554 unsigned int keep_locks
:1;
555 unsigned int skip_locking
:1;
556 unsigned int leave_spinning
:1;
557 unsigned int search_commit_root
:1;
561 * items in the extent btree are used to record the objectid of the
562 * owner of the block and the number of references
565 struct btrfs_extent_item
{
569 } __attribute__ ((__packed__
));
571 struct btrfs_extent_item_v0
{
573 } __attribute__ ((__packed__
));
575 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
576 sizeof(struct btrfs_item))
578 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
579 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
581 /* following flags only apply to tree blocks */
583 /* use full backrefs for extent pointers in the block */
584 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
587 * this flag is only used internally by scrub and may be changed at any time
588 * it is only declared here to avoid collisions
590 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
592 struct btrfs_tree_block_info
{
593 struct btrfs_disk_key key
;
595 } __attribute__ ((__packed__
));
597 struct btrfs_extent_data_ref
{
602 } __attribute__ ((__packed__
));
604 struct btrfs_shared_data_ref
{
606 } __attribute__ ((__packed__
));
608 struct btrfs_extent_inline_ref
{
611 } __attribute__ ((__packed__
));
613 /* old style backrefs item */
614 struct btrfs_extent_ref_v0
{
619 } __attribute__ ((__packed__
));
622 /* dev extents record free space on individual devices. The owner
623 * field points back to the chunk allocation mapping tree that allocated
624 * the extent. The chunk tree uuid field is a way to double check the owner
626 struct btrfs_dev_extent
{
628 __le64 chunk_objectid
;
631 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
632 } __attribute__ ((__packed__
));
634 struct btrfs_inode_ref
{
638 } __attribute__ ((__packed__
));
640 struct btrfs_timespec
{
643 } __attribute__ ((__packed__
));
645 enum btrfs_compression_type
{
646 BTRFS_COMPRESS_NONE
= 0,
647 BTRFS_COMPRESS_ZLIB
= 1,
648 BTRFS_COMPRESS_LZO
= 2,
649 BTRFS_COMPRESS_TYPES
= 2,
650 BTRFS_COMPRESS_LAST
= 3,
653 struct btrfs_inode_item
{
654 /* nfs style generation number */
656 /* transid that last touched this inode */
668 /* modification sequence number for NFS */
672 * a little future expansion, for more than this we can
673 * just grow the inode item and version it
676 struct btrfs_timespec atime
;
677 struct btrfs_timespec ctime
;
678 struct btrfs_timespec mtime
;
679 struct btrfs_timespec otime
;
680 } __attribute__ ((__packed__
));
682 struct btrfs_dir_log_item
{
684 } __attribute__ ((__packed__
));
686 struct btrfs_dir_item
{
687 struct btrfs_disk_key location
;
692 } __attribute__ ((__packed__
));
694 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
696 struct btrfs_root_item
{
697 struct btrfs_inode_item inode
;
703 __le64 last_snapshot
;
706 struct btrfs_disk_key drop_progress
;
709 } __attribute__ ((__packed__
));
712 * this is used for both forward and backward root refs
714 struct btrfs_root_ref
{
718 } __attribute__ ((__packed__
));
720 struct btrfs_disk_balance_args
{
722 * profiles to operate on, single is denoted by
723 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
733 /* devid subset filter [pstart..pend) */
737 /* btrfs virtual address space subset filter [vstart..vend) */
742 * profile to convert to, single is denoted by
743 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
747 /* BTRFS_BALANCE_ARGS_* */
751 } __attribute__ ((__packed__
));
754 * store balance parameters to disk so that balance can be properly
755 * resumed after crash or unmount
757 struct btrfs_balance_item
{
758 /* BTRFS_BALANCE_* */
761 struct btrfs_disk_balance_args data
;
762 struct btrfs_disk_balance_args meta
;
763 struct btrfs_disk_balance_args sys
;
766 } __attribute__ ((__packed__
));
768 #define BTRFS_FILE_EXTENT_INLINE 0
769 #define BTRFS_FILE_EXTENT_REG 1
770 #define BTRFS_FILE_EXTENT_PREALLOC 2
772 struct btrfs_file_extent_item
{
774 * transaction id that created this extent
778 * max number of bytes to hold this extent in ram
779 * when we split a compressed extent we can't know how big
780 * each of the resulting pieces will be. So, this is
781 * an upper limit on the size of the extent in ram instead of
787 * 32 bits for the various ways we might encode the data,
788 * including compression and encryption. If any of these
789 * are set to something a given disk format doesn't understand
790 * it is treated like an incompat flag for reading and writing,
795 __le16 other_encoding
; /* spare for later use */
797 /* are we inline data or a real extent? */
801 * disk space consumed by the extent, checksum blocks are included
805 __le64 disk_num_bytes
;
807 * the logical offset in file blocks (no csums)
808 * this extent record is for. This allows a file extent to point
809 * into the middle of an existing extent on disk, sharing it
810 * between two snapshots (useful if some bytes in the middle of the
811 * extent have changed
815 * the logical number of file blocks (no csums included). This
816 * always reflects the size uncompressed and without encoding.
820 } __attribute__ ((__packed__
));
822 struct btrfs_csum_item
{
824 } __attribute__ ((__packed__
));
826 /* different types of block groups (and chunks) */
827 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
828 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
829 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
830 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
831 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
832 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
833 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
834 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
835 #define BTRFS_NR_RAID_TYPES 5
837 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
838 BTRFS_BLOCK_GROUP_SYSTEM | \
839 BTRFS_BLOCK_GROUP_METADATA)
841 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
842 BTRFS_BLOCK_GROUP_RAID1 | \
843 BTRFS_BLOCK_GROUP_DUP | \
844 BTRFS_BLOCK_GROUP_RAID10)
846 * We need a bit for restriper to be able to tell when chunks of type
847 * SINGLE are available. This "extended" profile format is used in
848 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
849 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
850 * to avoid remappings between two formats in future.
852 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
854 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
855 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
857 static inline u64
chunk_to_extended(u64 flags
)
859 if ((flags
& BTRFS_BLOCK_GROUP_PROFILE_MASK
) == 0)
860 flags
|= BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
864 static inline u64
extended_to_chunk(u64 flags
)
866 return flags
& ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
869 struct btrfs_block_group_item
{
871 __le64 chunk_objectid
;
873 } __attribute__ ((__packed__
));
875 struct btrfs_space_info
{
878 u64 total_bytes
; /* total bytes in the space,
879 this doesn't take mirrors into account */
880 u64 bytes_used
; /* total bytes used,
881 this doesn't take mirrors into account */
882 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
883 transaction finishes */
884 u64 bytes_reserved
; /* total bytes the allocator has reserved for
885 current allocations */
886 u64 bytes_readonly
; /* total bytes that are read only */
888 u64 bytes_may_use
; /* number of bytes that may be used for
889 delalloc/allocations */
890 u64 disk_used
; /* total bytes used on disk */
891 u64 disk_total
; /* total bytes on disk, takes mirrors into
895 * we bump reservation progress every time we decrement
896 * bytes_reserved. This way people waiting for reservations
897 * know something good has happened and they can check
898 * for progress. The number here isn't to be trusted, it
899 * just shows reclaim activity
901 unsigned long reservation_progress
;
903 unsigned int full
:1; /* indicates that we cannot allocate any more
904 chunks for this space */
905 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
907 unsigned int flush
:1; /* set if we are trying to make space */
909 unsigned int force_alloc
; /* set if we need to force a chunk
910 alloc for this space */
912 struct list_head list
;
914 /* for block groups in our same type */
915 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
917 struct rw_semaphore groups_sem
;
918 wait_queue_head_t wait
;
921 struct btrfs_block_rsv
{
924 struct btrfs_space_info
*space_info
;
930 * free clusters are used to claim free space in relatively large chunks,
931 * allowing us to do less seeky writes. They are used for all metadata
932 * allocations and data allocations in ssd mode.
934 struct btrfs_free_cluster
{
936 spinlock_t refill_lock
;
939 /* largest extent in this cluster */
942 /* first extent starting offset */
945 struct btrfs_block_group_cache
*block_group
;
947 * when a cluster is allocated from a block group, we put the
948 * cluster onto a list in the block group so that it can
949 * be freed before the block group is freed.
951 struct list_head block_group_list
;
954 enum btrfs_caching_type
{
956 BTRFS_CACHE_STARTED
= 1,
957 BTRFS_CACHE_FAST
= 2,
958 BTRFS_CACHE_FINISHED
= 3,
961 enum btrfs_disk_cache_state
{
962 BTRFS_DC_WRITTEN
= 0,
966 BTRFS_DC_NEED_WRITE
= 4,
969 struct btrfs_caching_control
{
970 struct list_head list
;
972 wait_queue_head_t wait
;
973 struct btrfs_work work
;
974 struct btrfs_block_group_cache
*block_group
;
979 struct btrfs_block_group_cache
{
980 struct btrfs_key key
;
981 struct btrfs_block_group_item item
;
982 struct btrfs_fs_info
*fs_info
;
990 u64 cache_generation
;
992 unsigned int dirty
:1;
995 int disk_cache_state
;
997 /* cache tracking stuff */
999 struct btrfs_caching_control
*caching_ctl
;
1000 u64 last_byte_to_unpin
;
1002 struct btrfs_space_info
*space_info
;
1004 /* free space cache stuff */
1005 struct btrfs_free_space_ctl
*free_space_ctl
;
1007 /* block group cache stuff */
1008 struct rb_node cache_node
;
1010 /* for block groups in the same raid type */
1011 struct list_head list
;
1016 /* List of struct btrfs_free_clusters for this block group.
1017 * Today it will only have one thing on it, but that may change
1019 struct list_head cluster_list
;
1022 struct reloc_control
;
1023 struct btrfs_device
;
1024 struct btrfs_fs_devices
;
1025 struct btrfs_balance_control
;
1026 struct btrfs_delayed_root
;
1027 struct btrfs_fs_info
{
1028 u8 fsid
[BTRFS_FSID_SIZE
];
1029 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1030 struct btrfs_root
*extent_root
;
1031 struct btrfs_root
*tree_root
;
1032 struct btrfs_root
*chunk_root
;
1033 struct btrfs_root
*dev_root
;
1034 struct btrfs_root
*fs_root
;
1035 struct btrfs_root
*csum_root
;
1037 /* the log root tree is a directory of all the other log roots */
1038 struct btrfs_root
*log_root_tree
;
1040 spinlock_t fs_roots_radix_lock
;
1041 struct radix_tree_root fs_roots_radix
;
1043 /* block group cache stuff */
1044 spinlock_t block_group_cache_lock
;
1045 struct rb_root block_group_cache_tree
;
1047 /* keep track of unallocated space */
1048 spinlock_t free_chunk_lock
;
1049 u64 free_chunk_space
;
1051 struct extent_io_tree freed_extents
[2];
1052 struct extent_io_tree
*pinned_extents
;
1054 /* logical->physical extent mapping */
1055 struct btrfs_mapping_tree mapping_tree
;
1058 * block reservation for extent, checksum, root tree and
1059 * delayed dir index item
1061 struct btrfs_block_rsv global_block_rsv
;
1062 /* block reservation for delay allocation */
1063 struct btrfs_block_rsv delalloc_block_rsv
;
1064 /* block reservation for metadata operations */
1065 struct btrfs_block_rsv trans_block_rsv
;
1066 /* block reservation for chunk tree */
1067 struct btrfs_block_rsv chunk_block_rsv
;
1068 /* block reservation for delayed operations */
1069 struct btrfs_block_rsv delayed_block_rsv
;
1071 struct btrfs_block_rsv empty_block_rsv
;
1074 u64 last_trans_committed
;
1077 * this is updated to the current trans every time a full commit
1078 * is required instead of the faster short fsync log commits
1080 u64 last_trans_log_full_commit
;
1081 unsigned long mount_opt
:21;
1082 unsigned long compress_type
:4;
1085 struct btrfs_transaction
*running_transaction
;
1086 wait_queue_head_t transaction_throttle
;
1087 wait_queue_head_t transaction_wait
;
1088 wait_queue_head_t transaction_blocked_wait
;
1089 wait_queue_head_t async_submit_wait
;
1091 struct btrfs_super_block
*super_copy
;
1092 struct btrfs_super_block
*super_for_commit
;
1093 struct block_device
*__bdev
;
1094 struct super_block
*sb
;
1095 struct inode
*btree_inode
;
1096 struct backing_dev_info bdi
;
1097 struct mutex tree_log_mutex
;
1098 struct mutex transaction_kthread_mutex
;
1099 struct mutex cleaner_mutex
;
1100 struct mutex chunk_mutex
;
1101 struct mutex volume_mutex
;
1103 * this protects the ordered operations list only while we are
1104 * processing all of the entries on it. This way we make
1105 * sure the commit code doesn't find the list temporarily empty
1106 * because another function happens to be doing non-waiting preflush
1107 * before jumping into the main commit.
1109 struct mutex ordered_operations_mutex
;
1110 struct rw_semaphore extent_commit_sem
;
1112 struct rw_semaphore cleanup_work_sem
;
1114 struct rw_semaphore subvol_sem
;
1115 struct srcu_struct subvol_srcu
;
1117 spinlock_t trans_lock
;
1119 * the reloc mutex goes with the trans lock, it is taken
1120 * during commit to protect us from the relocation code
1122 struct mutex reloc_mutex
;
1124 struct list_head trans_list
;
1125 struct list_head hashers
;
1126 struct list_head dead_roots
;
1127 struct list_head caching_block_groups
;
1129 spinlock_t delayed_iput_lock
;
1130 struct list_head delayed_iputs
;
1132 atomic_t nr_async_submits
;
1133 atomic_t async_submit_draining
;
1134 atomic_t nr_async_bios
;
1135 atomic_t async_delalloc_pages
;
1136 atomic_t open_ioctl_trans
;
1139 * this is used by the balancing code to wait for all the pending
1142 spinlock_t ordered_extent_lock
;
1145 * all of the data=ordered extents pending writeback
1146 * these can span multiple transactions and basically include
1147 * every dirty data page that isn't from nodatacow
1149 struct list_head ordered_extents
;
1152 * all of the inodes that have delalloc bytes. It is possible for
1153 * this list to be empty even when there is still dirty data=ordered
1154 * extents waiting to finish IO.
1156 struct list_head delalloc_inodes
;
1159 * special rename and truncate targets that must be on disk before
1160 * we're allowed to commit. This is basically the ext3 style
1161 * data=ordered list.
1163 struct list_head ordered_operations
;
1166 * there is a pool of worker threads for checksumming during writes
1167 * and a pool for checksumming after reads. This is because readers
1168 * can run with FS locks held, and the writers may be waiting for
1169 * those locks. We don't want ordering in the pending list to cause
1170 * deadlocks, and so the two are serviced separately.
1172 * A third pool does submit_bio to avoid deadlocking with the other
1175 struct btrfs_workers generic_worker
;
1176 struct btrfs_workers workers
;
1177 struct btrfs_workers delalloc_workers
;
1178 struct btrfs_workers endio_workers
;
1179 struct btrfs_workers endio_meta_workers
;
1180 struct btrfs_workers endio_meta_write_workers
;
1181 struct btrfs_workers endio_write_workers
;
1182 struct btrfs_workers endio_freespace_worker
;
1183 struct btrfs_workers submit_workers
;
1184 struct btrfs_workers caching_workers
;
1185 struct btrfs_workers readahead_workers
;
1188 * fixup workers take dirty pages that didn't properly go through
1189 * the cow mechanism and make them safe to write. It happens
1190 * for the sys_munmap function call path
1192 struct btrfs_workers fixup_workers
;
1193 struct btrfs_workers delayed_workers
;
1194 struct task_struct
*transaction_kthread
;
1195 struct task_struct
*cleaner_kthread
;
1196 int thread_pool_size
;
1198 struct kobject super_kobj
;
1199 struct completion kobj_unregister
;
1202 int log_root_recovering
;
1208 /* protected by the delalloc lock, used to keep from writing
1209 * metadata until there is a nice batch
1211 u64 dirty_metadata_bytes
;
1212 struct list_head dirty_cowonly_roots
;
1214 struct btrfs_fs_devices
*fs_devices
;
1217 * the space_info list is almost entirely read only. It only changes
1218 * when we add a new raid type to the FS, and that happens
1219 * very rarely. RCU is used to protect it.
1221 struct list_head space_info
;
1223 struct reloc_control
*reloc_ctl
;
1225 spinlock_t delalloc_lock
;
1228 /* data_alloc_cluster is only used in ssd mode */
1229 struct btrfs_free_cluster data_alloc_cluster
;
1231 /* all metadata allocations go through this cluster */
1232 struct btrfs_free_cluster meta_alloc_cluster
;
1234 /* auto defrag inodes go here */
1235 spinlock_t defrag_inodes_lock
;
1236 struct rb_root defrag_inodes
;
1237 atomic_t defrag_running
;
1239 spinlock_t ref_cache_lock
;
1240 u64 total_ref_cache_size
;
1243 * these three are in extended format (availability of single
1244 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1245 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1247 u64 avail_data_alloc_bits
;
1248 u64 avail_metadata_alloc_bits
;
1249 u64 avail_system_alloc_bits
;
1251 /* restriper state */
1252 spinlock_t balance_lock
;
1253 struct mutex balance_mutex
;
1254 atomic_t balance_running
;
1255 atomic_t balance_pause_req
;
1256 atomic_t balance_cancel_req
;
1257 struct btrfs_balance_control
*balance_ctl
;
1258 wait_queue_head_t balance_wait_q
;
1260 unsigned data_chunk_allocations
;
1261 unsigned metadata_ratio
;
1265 /* private scrub information */
1266 struct mutex scrub_lock
;
1267 atomic_t scrubs_running
;
1268 atomic_t scrub_pause_req
;
1269 atomic_t scrubs_paused
;
1270 atomic_t scrub_cancel_req
;
1271 wait_queue_head_t scrub_pause_wait
;
1272 struct rw_semaphore scrub_super_lock
;
1273 int scrub_workers_refcnt
;
1274 struct btrfs_workers scrub_workers
;
1276 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1277 u32 check_integrity_print_mask
;
1280 /* filesystem state */
1283 struct btrfs_delayed_root
*delayed_root
;
1285 /* readahead tree */
1286 spinlock_t reada_lock
;
1287 struct radix_tree_root reada_tree
;
1289 /* next backup root to be overwritten */
1290 int backup_root_index
;
1294 * in ram representation of the tree. extent_root is used for all allocations
1295 * and for the extent tree extent_root root.
1298 struct extent_buffer
*node
;
1300 struct extent_buffer
*commit_root
;
1301 struct btrfs_root
*log_root
;
1302 struct btrfs_root
*reloc_root
;
1304 struct btrfs_root_item root_item
;
1305 struct btrfs_key root_key
;
1306 struct btrfs_fs_info
*fs_info
;
1307 struct extent_io_tree dirty_log_pages
;
1309 struct kobject root_kobj
;
1310 struct completion kobj_unregister
;
1311 struct mutex objectid_mutex
;
1313 spinlock_t accounting_lock
;
1314 struct btrfs_block_rsv
*block_rsv
;
1316 /* free ino cache stuff */
1317 struct mutex fs_commit_mutex
;
1318 struct btrfs_free_space_ctl
*free_ino_ctl
;
1319 enum btrfs_caching_type cached
;
1320 spinlock_t cache_lock
;
1321 wait_queue_head_t cache_wait
;
1322 struct btrfs_free_space_ctl
*free_ino_pinned
;
1324 struct inode
*cache_inode
;
1326 struct mutex log_mutex
;
1327 wait_queue_head_t log_writer_wait
;
1328 wait_queue_head_t log_commit_wait
[2];
1329 atomic_t log_writers
;
1330 atomic_t log_commit
[2];
1331 unsigned long log_transid
;
1332 unsigned long last_log_commit
;
1333 unsigned long log_batch
;
1334 pid_t log_start_pid
;
1335 bool log_multiple_pids
;
1340 /* data allocations are done in sectorsize units */
1343 /* node allocations are done in nodesize units */
1346 /* leaf allocations are done in leafsize units */
1353 u64 highest_objectid
;
1355 /* btrfs_record_root_in_trans is a multi-step process,
1356 * and it can race with the balancing code. But the
1357 * race is very small, and only the first time the root
1358 * is added to each transaction. So in_trans_setup
1359 * is used to tell us when more checks are required
1361 unsigned long in_trans_setup
;
1366 u64 defrag_trans_start
;
1367 struct btrfs_key defrag_progress
;
1368 struct btrfs_key defrag_max
;
1372 /* the dirty list is only used by non-reference counted roots */
1373 struct list_head dirty_list
;
1375 struct list_head root_list
;
1377 spinlock_t orphan_lock
;
1378 struct list_head orphan_list
;
1379 struct btrfs_block_rsv
*orphan_block_rsv
;
1380 int orphan_item_inserted
;
1381 int orphan_cleanup_state
;
1383 spinlock_t inode_lock
;
1384 /* red-black tree that keeps track of in-memory inodes */
1385 struct rb_root inode_tree
;
1388 * radix tree that keeps track of delayed nodes of every inode,
1389 * protected by inode_lock
1391 struct radix_tree_root delayed_nodes_tree
;
1393 * right now this just gets used so that a root has its own devid
1394 * for stat. It may be used for more later
1401 struct btrfs_ioctl_defrag_range_args
{
1402 /* start of the defrag operation */
1405 /* number of bytes to defrag, use (u64)-1 to say all */
1409 * flags for the operation, which can include turning
1410 * on compression for this one defrag
1415 * any extent bigger than this will be considered
1416 * already defragged. Use 0 to take the kernel default
1417 * Use 1 to say every single extent must be rewritten
1419 __u32 extent_thresh
;
1422 * which compression method to use if turning on compression
1423 * for this defrag operation. If unspecified, zlib will
1426 __u32 compress_type
;
1428 /* spare for later */
1434 * inode items have the data typically returned from stat and store other
1435 * info about object characteristics. There is one for every file and dir in
1438 #define BTRFS_INODE_ITEM_KEY 1
1439 #define BTRFS_INODE_REF_KEY 12
1440 #define BTRFS_XATTR_ITEM_KEY 24
1441 #define BTRFS_ORPHAN_ITEM_KEY 48
1442 /* reserve 2-15 close to the inode for later flexibility */
1445 * dir items are the name -> inode pointers in a directory. There is one
1446 * for every name in a directory.
1448 #define BTRFS_DIR_LOG_ITEM_KEY 60
1449 #define BTRFS_DIR_LOG_INDEX_KEY 72
1450 #define BTRFS_DIR_ITEM_KEY 84
1451 #define BTRFS_DIR_INDEX_KEY 96
1453 * extent data is for file data
1455 #define BTRFS_EXTENT_DATA_KEY 108
1458 * extent csums are stored in a separate tree and hold csums for
1459 * an entire extent on disk.
1461 #define BTRFS_EXTENT_CSUM_KEY 128
1464 * root items point to tree roots. They are typically in the root
1465 * tree used by the super block to find all the other trees
1467 #define BTRFS_ROOT_ITEM_KEY 132
1470 * root backrefs tie subvols and snapshots to the directory entries that
1473 #define BTRFS_ROOT_BACKREF_KEY 144
1476 * root refs make a fast index for listing all of the snapshots and
1477 * subvolumes referenced by a given root. They point directly to the
1478 * directory item in the root that references the subvol
1480 #define BTRFS_ROOT_REF_KEY 156
1483 * extent items are in the extent map tree. These record which blocks
1484 * are used, and how many references there are to each block
1486 #define BTRFS_EXTENT_ITEM_KEY 168
1488 #define BTRFS_TREE_BLOCK_REF_KEY 176
1490 #define BTRFS_EXTENT_DATA_REF_KEY 178
1492 #define BTRFS_EXTENT_REF_V0_KEY 180
1494 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1496 #define BTRFS_SHARED_DATA_REF_KEY 184
1499 * block groups give us hints into the extent allocation trees. Which
1500 * blocks are free etc etc
1502 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1504 #define BTRFS_DEV_EXTENT_KEY 204
1505 #define BTRFS_DEV_ITEM_KEY 216
1506 #define BTRFS_CHUNK_ITEM_KEY 228
1508 #define BTRFS_BALANCE_ITEM_KEY 248
1511 * string items are for debugging. They just store a short string of
1514 #define BTRFS_STRING_ITEM_KEY 253
1517 * Flags for mount options.
1519 * Note: don't forget to add new options to btrfs_show_options()
1521 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1522 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1523 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1524 #define BTRFS_MOUNT_SSD (1 << 3)
1525 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1526 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1527 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1528 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1529 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1530 #define BTRFS_MOUNT_NOSSD (1 << 9)
1531 #define BTRFS_MOUNT_DISCARD (1 << 10)
1532 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1533 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1534 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1535 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1536 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1537 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1538 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1539 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1540 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1541 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1542 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1543 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1545 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1546 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1547 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1552 #define BTRFS_INODE_NODATASUM (1 << 0)
1553 #define BTRFS_INODE_NODATACOW (1 << 1)
1554 #define BTRFS_INODE_READONLY (1 << 2)
1555 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1556 #define BTRFS_INODE_PREALLOC (1 << 4)
1557 #define BTRFS_INODE_SYNC (1 << 5)
1558 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1559 #define BTRFS_INODE_APPEND (1 << 7)
1560 #define BTRFS_INODE_NODUMP (1 << 8)
1561 #define BTRFS_INODE_NOATIME (1 << 9)
1562 #define BTRFS_INODE_DIRSYNC (1 << 10)
1563 #define BTRFS_INODE_COMPRESS (1 << 11)
1565 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1567 struct btrfs_map_token
{
1568 struct extent_buffer
*eb
;
1570 unsigned long offset
;
1573 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1575 memset(token
, 0, sizeof(*token
));
1578 /* some macros to generate set/get funcs for the struct fields. This
1579 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1582 #define le8_to_cpu(v) (v)
1583 #define cpu_to_le8(v) (v)
1586 #define read_eb_member(eb, ptr, type, member, result) ( \
1587 read_extent_buffer(eb, (char *)(result), \
1588 ((unsigned long)(ptr)) + \
1589 offsetof(type, member), \
1590 sizeof(((type *)0)->member)))
1592 #define write_eb_member(eb, ptr, type, member, result) ( \
1593 write_extent_buffer(eb, (char *)(result), \
1594 ((unsigned long)(ptr)) + \
1595 offsetof(type, member), \
1596 sizeof(((type *)0)->member)))
1598 #ifndef BTRFS_SETGET_FUNCS
1599 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1600 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1601 u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, struct btrfs_map_token *token); \
1602 void btrfs_set_token_##name(struct extent_buffer *eb, type *s, u##bits val, struct btrfs_map_token *token);\
1603 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1606 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1607 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1609 type *p = page_address(eb->pages[0]); \
1610 u##bits res = le##bits##_to_cpu(p->member); \
1613 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1616 type *p = page_address(eb->pages[0]); \
1617 p->member = cpu_to_le##bits(val); \
1620 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1621 static inline u##bits btrfs_##name(type *s) \
1623 return le##bits##_to_cpu(s->member); \
1625 static inline void btrfs_set_##name(type *s, u##bits val) \
1627 s->member = cpu_to_le##bits(val); \
1630 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1631 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1632 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1633 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1634 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1635 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1637 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1638 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1639 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1640 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1641 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1642 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1644 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1645 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1647 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1649 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1651 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1653 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1655 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1656 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1658 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1660 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1662 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1665 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1667 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1670 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1672 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1675 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1676 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1677 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1678 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1679 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1680 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1681 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1682 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1683 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1684 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1685 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1687 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1689 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1692 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1693 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1694 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1696 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1698 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1700 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1702 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1703 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1705 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1707 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1708 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1710 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1713 unsigned long offset
= (unsigned long)c
;
1714 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1715 offset
+= nr
* sizeof(struct btrfs_stripe
);
1716 return (struct btrfs_stripe
*)offset
;
1719 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1721 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1724 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1725 struct btrfs_chunk
*c
, int nr
)
1727 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1730 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1731 struct btrfs_chunk
*c
, int nr
)
1733 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1736 /* struct btrfs_block_group_item */
1737 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1739 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1741 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1742 struct btrfs_block_group_item
, chunk_objectid
, 64);
1744 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1745 struct btrfs_block_group_item
, chunk_objectid
, 64);
1746 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1747 struct btrfs_block_group_item
, flags
, 64);
1748 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1749 struct btrfs_block_group_item
, flags
, 64);
1751 /* struct btrfs_inode_ref */
1752 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1753 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1755 /* struct btrfs_inode_item */
1756 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1757 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1758 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1759 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1760 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1761 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1762 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1763 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1764 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1765 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1766 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1767 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1769 static inline struct btrfs_timespec
*
1770 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1772 unsigned long ptr
= (unsigned long)inode_item
;
1773 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1774 return (struct btrfs_timespec
*)ptr
;
1777 static inline struct btrfs_timespec
*
1778 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1780 unsigned long ptr
= (unsigned long)inode_item
;
1781 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1782 return (struct btrfs_timespec
*)ptr
;
1785 static inline struct btrfs_timespec
*
1786 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1788 unsigned long ptr
= (unsigned long)inode_item
;
1789 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1790 return (struct btrfs_timespec
*)ptr
;
1793 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1794 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1796 /* struct btrfs_dev_extent */
1797 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1799 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1800 chunk_objectid
, 64);
1801 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1803 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1805 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1807 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1808 return (u8
*)((unsigned long)dev
+ ptr
);
1811 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1812 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1814 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1816 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1819 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1821 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1822 struct btrfs_tree_block_info
*item
,
1823 struct btrfs_disk_key
*key
)
1825 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1828 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1829 struct btrfs_tree_block_info
*item
,
1830 struct btrfs_disk_key
*key
)
1832 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1835 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1837 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1839 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1841 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1844 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1847 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1849 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1852 static inline u32
btrfs_extent_inline_ref_size(int type
)
1854 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1855 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1856 return sizeof(struct btrfs_extent_inline_ref
);
1857 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1858 return sizeof(struct btrfs_shared_data_ref
) +
1859 sizeof(struct btrfs_extent_inline_ref
);
1860 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1861 return sizeof(struct btrfs_extent_data_ref
) +
1862 offsetof(struct btrfs_extent_inline_ref
, offset
);
1867 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1868 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1870 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1871 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1873 /* struct btrfs_node */
1874 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1875 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1877 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1880 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1881 sizeof(struct btrfs_key_ptr
) * nr
;
1882 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1885 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1889 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1890 sizeof(struct btrfs_key_ptr
) * nr
;
1891 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1894 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1897 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1898 sizeof(struct btrfs_key_ptr
) * nr
;
1899 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1902 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1906 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1907 sizeof(struct btrfs_key_ptr
) * nr
;
1908 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1911 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1913 return offsetof(struct btrfs_node
, ptrs
) +
1914 sizeof(struct btrfs_key_ptr
) * nr
;
1917 void btrfs_node_key(struct extent_buffer
*eb
,
1918 struct btrfs_disk_key
*disk_key
, int nr
);
1920 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1921 struct btrfs_disk_key
*disk_key
, int nr
)
1924 ptr
= btrfs_node_key_ptr_offset(nr
);
1925 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1926 struct btrfs_key_ptr
, key
, disk_key
);
1929 /* struct btrfs_item */
1930 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1931 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1933 static inline unsigned long btrfs_item_nr_offset(int nr
)
1935 return offsetof(struct btrfs_leaf
, items
) +
1936 sizeof(struct btrfs_item
) * nr
;
1939 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1942 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1945 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1946 struct btrfs_item
*item
)
1948 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1951 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1953 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1956 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1958 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1961 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1963 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1966 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1967 struct btrfs_disk_key
*disk_key
, int nr
)
1969 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1970 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1973 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1974 struct btrfs_disk_key
*disk_key
, int nr
)
1976 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1977 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1980 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1983 * struct btrfs_root_ref
1985 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1986 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1987 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1989 /* struct btrfs_dir_item */
1990 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1991 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1992 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1993 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1995 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1996 struct btrfs_dir_item
*item
,
1997 struct btrfs_disk_key
*key
)
1999 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2002 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2003 struct btrfs_dir_item
*item
,
2004 struct btrfs_disk_key
*key
)
2006 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2009 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2011 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2013 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2016 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
2017 struct btrfs_free_space_header
*h
,
2018 struct btrfs_disk_key
*key
)
2020 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2023 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2024 struct btrfs_free_space_header
*h
,
2025 struct btrfs_disk_key
*key
)
2027 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2030 /* struct btrfs_disk_key */
2031 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2033 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2034 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2036 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2037 struct btrfs_disk_key
*disk
)
2039 cpu
->offset
= le64_to_cpu(disk
->offset
);
2040 cpu
->type
= disk
->type
;
2041 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2044 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2045 struct btrfs_key
*cpu
)
2047 disk
->offset
= cpu_to_le64(cpu
->offset
);
2048 disk
->type
= cpu
->type
;
2049 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2052 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2053 struct btrfs_key
*key
, int nr
)
2055 struct btrfs_disk_key disk_key
;
2056 btrfs_node_key(eb
, &disk_key
, nr
);
2057 btrfs_disk_key_to_cpu(key
, &disk_key
);
2060 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2061 struct btrfs_key
*key
, int nr
)
2063 struct btrfs_disk_key disk_key
;
2064 btrfs_item_key(eb
, &disk_key
, nr
);
2065 btrfs_disk_key_to_cpu(key
, &disk_key
);
2068 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2069 struct btrfs_dir_item
*item
,
2070 struct btrfs_key
*key
)
2072 struct btrfs_disk_key disk_key
;
2073 btrfs_dir_item_key(eb
, item
, &disk_key
);
2074 btrfs_disk_key_to_cpu(key
, &disk_key
);
2078 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2083 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2088 /* struct btrfs_header */
2089 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2090 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2092 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2093 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2094 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2095 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2097 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2099 return (btrfs_header_flags(eb
) & flag
) == flag
;
2102 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2104 u64 flags
= btrfs_header_flags(eb
);
2105 btrfs_set_header_flags(eb
, flags
| flag
);
2106 return (flags
& flag
) == flag
;
2109 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2111 u64 flags
= btrfs_header_flags(eb
);
2112 btrfs_set_header_flags(eb
, flags
& ~flag
);
2113 return (flags
& flag
) == flag
;
2116 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2118 u64 flags
= btrfs_header_flags(eb
);
2119 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2122 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2125 u64 flags
= btrfs_header_flags(eb
);
2126 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2127 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2128 btrfs_set_header_flags(eb
, flags
);
2131 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
2133 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
2137 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2139 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
2143 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2145 return btrfs_header_level(eb
) == 0;
2148 /* struct btrfs_root_item */
2149 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2151 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2152 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2153 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2155 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2157 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2158 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2159 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2160 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2161 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2162 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2163 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2164 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2167 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2169 return root
->root_item
.flags
& BTRFS_ROOT_SUBVOL_RDONLY
;
2172 /* struct btrfs_root_backup */
2173 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2175 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2177 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2178 tree_root_level
, 8);
2180 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2182 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2183 chunk_root_gen
, 64);
2184 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2185 chunk_root_level
, 8);
2187 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2189 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2190 extent_root_gen
, 64);
2191 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2192 extent_root_level
, 8);
2194 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2196 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2198 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2201 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2203 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2205 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2208 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2210 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2212 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2213 csum_root_level
, 8);
2214 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2216 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2218 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2221 /* struct btrfs_balance_item */
2222 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2224 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2225 struct btrfs_balance_item
*bi
,
2226 struct btrfs_disk_balance_args
*ba
)
2228 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2231 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2232 struct btrfs_balance_item
*bi
,
2233 struct btrfs_disk_balance_args
*ba
)
2235 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2238 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2239 struct btrfs_balance_item
*bi
,
2240 struct btrfs_disk_balance_args
*ba
)
2242 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2245 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2246 struct btrfs_balance_item
*bi
,
2247 struct btrfs_disk_balance_args
*ba
)
2249 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2252 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2253 struct btrfs_balance_item
*bi
,
2254 struct btrfs_disk_balance_args
*ba
)
2256 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2259 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2260 struct btrfs_balance_item
*bi
,
2261 struct btrfs_disk_balance_args
*ba
)
2263 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2267 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2268 struct btrfs_disk_balance_args
*disk
)
2270 memset(cpu
, 0, sizeof(*cpu
));
2272 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2273 cpu
->usage
= le64_to_cpu(disk
->usage
);
2274 cpu
->devid
= le64_to_cpu(disk
->devid
);
2275 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2276 cpu
->pend
= le64_to_cpu(disk
->pend
);
2277 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2278 cpu
->vend
= le64_to_cpu(disk
->vend
);
2279 cpu
->target
= le64_to_cpu(disk
->target
);
2280 cpu
->flags
= le64_to_cpu(disk
->flags
);
2284 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2285 struct btrfs_balance_args
*cpu
)
2287 memset(disk
, 0, sizeof(*disk
));
2289 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2290 disk
->usage
= cpu_to_le64(cpu
->usage
);
2291 disk
->devid
= cpu_to_le64(cpu
->devid
);
2292 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2293 disk
->pend
= cpu_to_le64(cpu
->pend
);
2294 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2295 disk
->vend
= cpu_to_le64(cpu
->vend
);
2296 disk
->target
= cpu_to_le64(cpu
->target
);
2297 disk
->flags
= cpu_to_le64(cpu
->flags
);
2300 /* struct btrfs_super_block */
2301 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2302 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2303 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2305 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2306 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2307 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2308 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2309 struct btrfs_super_block
, chunk_root_generation
, 64);
2310 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2312 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2314 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2315 chunk_root_level
, 8);
2316 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2318 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2319 log_root_transid
, 64);
2320 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2322 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2324 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2326 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2328 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2330 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2332 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2334 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2335 root_dir_objectid
, 64);
2336 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2338 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2340 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2341 compat_ro_flags
, 64);
2342 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2343 incompat_flags
, 64);
2344 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2346 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2347 cache_generation
, 64);
2349 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2351 int t
= btrfs_super_csum_type(s
);
2352 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2353 return btrfs_csum_sizes
[t
];
2356 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2358 return offsetof(struct btrfs_leaf
, items
);
2361 /* struct btrfs_file_extent_item */
2362 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2364 static inline unsigned long
2365 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2367 unsigned long offset
= (unsigned long)e
;
2368 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2372 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2374 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2377 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2379 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2381 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2382 disk_num_bytes
, 64);
2383 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2385 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2387 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2389 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2391 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2393 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2394 other_encoding
, 16);
2396 /* this returns the number of file bytes represented by the inline item.
2397 * If an item is compressed, this is the uncompressed size
2399 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2400 struct btrfs_file_extent_item
*e
)
2402 return btrfs_file_extent_ram_bytes(eb
, e
);
2406 * this returns the number of bytes used by the item on disk, minus the
2407 * size of any extent headers. If a file is compressed on disk, this is
2408 * the compressed size
2410 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2411 struct btrfs_item
*e
)
2413 unsigned long offset
;
2414 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2415 return btrfs_item_size(eb
, e
) - offset
;
2418 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
2420 return sb
->s_fs_info
;
2423 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2426 return root
->leafsize
;
2427 return root
->nodesize
;
2430 /* helper function to cast into the data area of the leaf. */
2431 #define btrfs_item_ptr(leaf, slot, type) \
2432 ((type *)(btrfs_leaf_data(leaf) + \
2433 btrfs_item_offset_nr(leaf, slot)))
2435 #define btrfs_item_ptr_offset(leaf, slot) \
2436 ((unsigned long)(btrfs_leaf_data(leaf) + \
2437 btrfs_item_offset_nr(leaf, slot)))
2439 static inline struct dentry
*fdentry(struct file
*file
)
2441 return file
->f_path
.dentry
;
2444 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2446 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2447 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2450 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2452 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
2456 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2459 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2464 * Doing a truncate won't result in new nodes or leaves, just what we need for
2467 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2470 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2474 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2475 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2476 struct btrfs_root
*root
, unsigned long count
);
2477 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2478 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2479 struct btrfs_root
*root
, u64 bytenr
,
2480 u64 num_bytes
, u64
*refs
, u64
*flags
);
2481 int btrfs_pin_extent(struct btrfs_root
*root
,
2482 u64 bytenr
, u64 num
, int reserved
);
2483 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle
*trans
,
2484 struct btrfs_root
*root
,
2485 u64 bytenr
, u64 num_bytes
);
2486 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2487 struct btrfs_root
*root
,
2488 u64 objectid
, u64 offset
, u64 bytenr
);
2489 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2490 struct btrfs_fs_info
*info
,
2492 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2493 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2494 u64 search_start
, u64 search_hint
, int owner
);
2495 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2496 struct btrfs_root
*root
, u32 blocksize
,
2497 u64 parent
, u64 root_objectid
,
2498 struct btrfs_disk_key
*key
, int level
,
2499 u64 hint
, u64 empty_size
, int for_cow
);
2500 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2501 struct btrfs_root
*root
,
2502 struct extent_buffer
*buf
,
2503 u64 parent
, int last_ref
, int for_cow
);
2504 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2505 struct btrfs_root
*root
,
2506 u64 bytenr
, u32 blocksize
,
2508 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2509 struct btrfs_root
*root
,
2510 u64 root_objectid
, u64 owner
,
2511 u64 offset
, struct btrfs_key
*ins
);
2512 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2513 struct btrfs_root
*root
,
2514 u64 root_objectid
, u64 owner
, u64 offset
,
2515 struct btrfs_key
*ins
);
2516 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2517 struct btrfs_root
*root
,
2518 u64 num_bytes
, u64 min_alloc_size
,
2519 u64 empty_size
, u64 hint_byte
,
2520 struct btrfs_key
*ins
, u64 data
);
2521 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2522 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
2523 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2524 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
2525 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2526 struct btrfs_root
*root
,
2527 u64 bytenr
, u64 num_bytes
, u64 flags
,
2529 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2530 struct btrfs_root
*root
,
2531 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
2532 u64 owner
, u64 offset
, int for_cow
);
2534 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2535 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
2536 u64 start
, u64 len
);
2537 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2538 struct btrfs_root
*root
);
2539 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2540 struct btrfs_root
*root
);
2541 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2542 struct btrfs_root
*root
,
2543 u64 bytenr
, u64 num_bytes
, u64 parent
,
2544 u64 root_objectid
, u64 owner
, u64 offset
, int for_cow
);
2546 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2547 struct btrfs_root
*root
);
2548 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2549 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2550 int btrfs_read_block_groups(struct btrfs_root
*root
);
2551 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2552 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2553 struct btrfs_root
*root
, u64 bytes_used
,
2554 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2556 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2557 struct btrfs_root
*root
, u64 group_start
);
2558 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2559 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2560 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2561 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2562 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
2563 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
2564 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2565 struct btrfs_root
*root
);
2566 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2567 struct inode
*inode
);
2568 void btrfs_orphan_release_metadata(struct inode
*inode
);
2569 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
2570 struct btrfs_pending_snapshot
*pending
);
2571 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2572 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2573 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
2574 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
2575 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2576 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2577 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2578 struct btrfs_block_rsv
*rsv
);
2579 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2580 struct btrfs_block_rsv
*block_rsv
,
2582 int btrfs_block_rsv_add_noflush(struct btrfs_root
*root
,
2583 struct btrfs_block_rsv
*block_rsv
,
2585 int btrfs_block_rsv_check(struct btrfs_root
*root
,
2586 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2587 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2588 struct btrfs_block_rsv
*block_rsv
,
2590 int btrfs_block_rsv_refill_noflush(struct btrfs_root
*root
,
2591 struct btrfs_block_rsv
*block_rsv
,
2593 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2594 struct btrfs_block_rsv
*dst_rsv
,
2596 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2597 struct btrfs_block_rsv
*block_rsv
,
2599 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2600 struct btrfs_block_group_cache
*cache
);
2601 void btrfs_set_block_group_rw(struct btrfs_root
*root
,
2602 struct btrfs_block_group_cache
*cache
);
2603 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2604 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2605 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2606 u64 start
, u64 end
);
2607 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2608 u64 num_bytes
, u64
*actual_bytes
);
2609 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2610 struct btrfs_root
*root
, u64 type
);
2611 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
2613 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2615 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2616 int level
, int *slot
);
2617 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2618 int btrfs_previous_item(struct btrfs_root
*root
,
2619 struct btrfs_path
*path
, u64 min_objectid
,
2621 void btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2622 struct btrfs_root
*root
, struct btrfs_path
*path
,
2623 struct btrfs_key
*new_key
);
2624 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2625 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2626 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2627 struct btrfs_key
*key
, int lowest_level
,
2628 int cache_only
, u64 min_trans
);
2629 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2630 struct btrfs_key
*max_key
,
2631 struct btrfs_path
*path
, int cache_only
,
2633 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2634 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2635 struct extent_buffer
*parent
, int parent_slot
,
2636 struct extent_buffer
**cow_ret
);
2637 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2638 struct btrfs_root
*root
,
2639 struct extent_buffer
*buf
,
2640 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2641 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2642 struct extent_buffer
*buf
);
2643 void btrfs_extend_item(struct btrfs_trans_handle
*trans
,
2644 struct btrfs_root
*root
, struct btrfs_path
*path
,
2646 void btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2647 struct btrfs_root
*root
,
2648 struct btrfs_path
*path
,
2649 u32 new_size
, int from_end
);
2650 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2651 struct btrfs_root
*root
,
2652 struct btrfs_path
*path
,
2653 struct btrfs_key
*new_key
,
2654 unsigned long split_offset
);
2655 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2656 struct btrfs_root
*root
,
2657 struct btrfs_path
*path
,
2658 struct btrfs_key
*new_key
);
2659 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2660 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2662 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2663 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2664 int start_slot
, int cache_only
, u64
*last_ret
,
2665 struct btrfs_key
*progress
);
2666 void btrfs_release_path(struct btrfs_path
*p
);
2667 struct btrfs_path
*btrfs_alloc_path(void);
2668 void btrfs_free_path(struct btrfs_path
*p
);
2669 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2670 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2671 struct extent_buffer
*held
, int held_rw
);
2672 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2674 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2675 struct btrfs_path
*path
, int slot
, int nr
);
2676 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2677 struct btrfs_root
*root
,
2678 struct btrfs_path
*path
)
2680 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2683 void setup_items_for_insert(struct btrfs_trans_handle
*trans
,
2684 struct btrfs_root
*root
, struct btrfs_path
*path
,
2685 struct btrfs_key
*cpu_key
, u32
*data_size
,
2686 u32 total_data
, u32 total_size
, int nr
);
2687 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2688 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2689 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2690 struct btrfs_root
*root
,
2691 struct btrfs_path
*path
,
2692 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2694 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2695 struct btrfs_root
*root
,
2696 struct btrfs_path
*path
,
2697 struct btrfs_key
*key
,
2700 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2703 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2704 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
2707 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2708 return btrfs_next_leaf(root
, p
);
2711 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2712 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2713 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
2714 struct btrfs_block_rsv
*block_rsv
,
2715 int update_ref
, int for_reloc
);
2716 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2717 struct btrfs_root
*root
,
2718 struct extent_buffer
*node
,
2719 struct extent_buffer
*parent
);
2720 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2723 * Get synced with close_ctree()
2726 return fs_info
->closing
;
2728 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
2730 kfree(fs_info
->balance_ctl
);
2731 kfree(fs_info
->delayed_root
);
2732 kfree(fs_info
->extent_root
);
2733 kfree(fs_info
->tree_root
);
2734 kfree(fs_info
->chunk_root
);
2735 kfree(fs_info
->dev_root
);
2736 kfree(fs_info
->csum_root
);
2737 kfree(fs_info
->super_copy
);
2738 kfree(fs_info
->super_for_commit
);
2743 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2744 struct btrfs_path
*path
,
2745 u64 root_id
, u64 ref_id
);
2746 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2747 struct btrfs_root
*tree_root
,
2748 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2749 const char *name
, int name_len
);
2750 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2751 struct btrfs_root
*tree_root
,
2752 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2753 const char *name
, int name_len
);
2754 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2755 struct btrfs_key
*key
);
2756 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2757 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2759 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
2760 struct btrfs_root
*root
,
2761 struct btrfs_key
*key
,
2762 struct btrfs_root_item
*item
);
2763 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2764 btrfs_root_item
*item
, struct btrfs_key
*key
);
2765 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2766 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2767 void btrfs_set_root_node(struct btrfs_root_item
*item
,
2768 struct extent_buffer
*node
);
2769 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2772 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2773 struct btrfs_root
*root
, const char *name
,
2774 int name_len
, struct inode
*dir
,
2775 struct btrfs_key
*location
, u8 type
, u64 index
);
2776 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2777 struct btrfs_root
*root
,
2778 struct btrfs_path
*path
, u64 dir
,
2779 const char *name
, int name_len
,
2781 struct btrfs_dir_item
*
2782 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2783 struct btrfs_root
*root
,
2784 struct btrfs_path
*path
, u64 dir
,
2785 u64 objectid
, const char *name
, int name_len
,
2787 struct btrfs_dir_item
*
2788 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2789 struct btrfs_path
*path
, u64 dirid
,
2790 const char *name
, int name_len
);
2791 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2792 struct btrfs_path
*path
,
2793 const char *name
, int name_len
);
2794 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2795 struct btrfs_root
*root
,
2796 struct btrfs_path
*path
,
2797 struct btrfs_dir_item
*di
);
2798 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2799 struct btrfs_root
*root
,
2800 struct btrfs_path
*path
, u64 objectid
,
2801 const char *name
, u16 name_len
,
2802 const void *data
, u16 data_len
);
2803 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2804 struct btrfs_root
*root
,
2805 struct btrfs_path
*path
, u64 dir
,
2806 const char *name
, u16 name_len
,
2808 int verify_dir_item(struct btrfs_root
*root
,
2809 struct extent_buffer
*leaf
,
2810 struct btrfs_dir_item
*dir_item
);
2813 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2814 struct btrfs_root
*root
, u64 offset
);
2815 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2816 struct btrfs_root
*root
, u64 offset
);
2817 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2820 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2821 struct btrfs_root
*root
,
2822 const char *name
, int name_len
,
2823 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2824 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2825 struct btrfs_root
*root
,
2826 const char *name
, int name_len
,
2827 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2828 struct btrfs_inode_ref
*
2829 btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2830 struct btrfs_root
*root
,
2831 struct btrfs_path
*path
,
2832 const char *name
, int name_len
,
2833 u64 inode_objectid
, u64 ref_objectid
, int mod
);
2834 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2835 struct btrfs_root
*root
,
2836 struct btrfs_path
*path
, u64 objectid
);
2837 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2838 *root
, struct btrfs_path
*path
,
2839 struct btrfs_key
*location
, int mod
);
2842 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2843 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2844 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2845 struct bio
*bio
, u32
*dst
);
2846 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
2847 struct bio
*bio
, u64 logical_offset
, u32
*dst
);
2848 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2849 struct btrfs_root
*root
,
2850 u64 objectid
, u64 pos
,
2851 u64 disk_offset
, u64 disk_num_bytes
,
2852 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2853 u8 compression
, u8 encryption
, u16 other_encoding
);
2854 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2855 struct btrfs_root
*root
,
2856 struct btrfs_path
*path
, u64 objectid
,
2857 u64 bytenr
, int mod
);
2858 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2859 struct btrfs_root
*root
,
2860 struct btrfs_ordered_sum
*sums
);
2861 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2862 struct bio
*bio
, u64 file_start
, int contig
);
2863 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2864 struct btrfs_root
*root
,
2865 struct btrfs_path
*path
,
2866 u64 bytenr
, int cow
);
2867 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2868 struct btrfs_root
*root
, struct btrfs_path
*path
,
2870 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
2871 struct list_head
*list
, int search_commit
);
2873 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
2874 size_t pg_offset
, u64 start
, u64 len
,
2877 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2878 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2879 #define ClearPageChecked ClearPageFsMisc
2880 #define SetPageChecked SetPageFsMisc
2881 #define PageChecked PageFsMisc
2884 /* This forces readahead on a given range of bytes in an inode */
2885 static inline void btrfs_force_ra(struct address_space
*mapping
,
2886 struct file_ra_state
*ra
, struct file
*file
,
2887 pgoff_t offset
, unsigned long req_size
)
2889 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
2892 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2893 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2894 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2895 struct btrfs_root
*root
,
2896 struct inode
*dir
, struct inode
*inode
,
2897 const char *name
, int name_len
);
2898 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2899 struct inode
*parent_inode
, struct inode
*inode
,
2900 const char *name
, int name_len
, int add_backref
, u64 index
);
2901 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2902 struct btrfs_root
*root
,
2903 struct inode
*dir
, u64 objectid
,
2904 const char *name
, int name_len
);
2905 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2906 struct btrfs_root
*root
,
2907 struct inode
*inode
, u64 new_size
,
2910 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2911 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
2912 struct extent_state
**cached_state
);
2913 int btrfs_writepages(struct address_space
*mapping
,
2914 struct writeback_control
*wbc
);
2915 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2916 struct btrfs_root
*new_root
, u64 new_dirid
);
2917 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2918 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2920 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2921 int btrfs_readpage(struct file
*file
, struct page
*page
);
2922 void btrfs_evict_inode(struct inode
*inode
);
2923 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
2924 int btrfs_dirty_inode(struct inode
*inode
);
2925 int btrfs_update_time(struct file
*file
);
2926 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2927 void btrfs_destroy_inode(struct inode
*inode
);
2928 int btrfs_drop_inode(struct inode
*inode
);
2929 int btrfs_init_cachep(void);
2930 void btrfs_destroy_cachep(void);
2931 long btrfs_ioctl_trans_end(struct file
*file
);
2932 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2933 struct btrfs_root
*root
, int *was_new
);
2934 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2935 size_t pg_offset
, u64 start
, u64 end
,
2937 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2938 struct btrfs_root
*root
,
2939 struct inode
*inode
);
2940 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2941 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2942 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
2943 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
2944 struct btrfs_root
*root
);
2945 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
2946 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
2947 void btrfs_add_delayed_iput(struct inode
*inode
);
2948 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
2949 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
2950 u64 start
, u64 num_bytes
, u64 min_size
,
2951 loff_t actual_len
, u64
*alloc_hint
);
2952 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
2953 struct btrfs_trans_handle
*trans
, int mode
,
2954 u64 start
, u64 num_bytes
, u64 min_size
,
2955 loff_t actual_len
, u64
*alloc_hint
);
2956 extern const struct dentry_operations btrfs_dentry_operations
;
2959 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2960 void btrfs_update_iflags(struct inode
*inode
);
2961 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2962 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
2963 struct btrfs_ioctl_defrag_range_args
*range
,
2964 u64 newer_than
, unsigned long max_pages
);
2966 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
2967 struct inode
*inode
);
2968 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
2969 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
2970 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2972 extern const struct file_operations btrfs_file_operations
;
2973 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
2974 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
2975 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2976 struct inode
*inode
, u64 start
, u64 end
);
2977 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2978 void btrfs_drop_pages(struct page
**pages
, size_t num_pages
);
2979 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
2980 struct page
**pages
, size_t num_pages
,
2981 loff_t pos
, size_t write_bytes
,
2982 struct extent_state
**cached
);
2985 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2986 struct btrfs_root
*root
, int cache_only
);
2989 int btrfs_init_sysfs(void);
2990 void btrfs_exit_sysfs(void);
2993 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2996 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2997 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2998 void btrfs_printk(struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
2999 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3000 unsigned int line
, int errno
, const char *fmt
, ...);
3002 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3003 struct btrfs_root
*root
, const char *function
,
3004 unsigned int line
, int errno
);
3006 #define btrfs_abort_transaction(trans, root, errno) \
3008 __btrfs_abort_transaction(trans, root, __func__, \
3012 #define btrfs_std_error(fs_info, errno) \
3015 __btrfs_std_error((fs_info), __func__, \
3016 __LINE__, (errno), NULL); \
3019 #define btrfs_error(fs_info, errno, fmt, args...) \
3021 __btrfs_std_error((fs_info), __func__, __LINE__, \
3022 (errno), fmt, ##args); \
3025 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3026 unsigned int line
, int errno
, const char *fmt
, ...);
3028 #define btrfs_panic(fs_info, errno, fmt, args...) \
3030 struct btrfs_fs_info *_i = (fs_info); \
3031 __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
3032 BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
3036 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3037 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3038 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3039 struct inode
*inode
, struct inode
*dir
);
3040 int btrfs_acl_chmod(struct inode
*inode
);
3042 #define btrfs_get_acl NULL
3043 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3044 struct inode
*inode
, struct inode
*dir
)
3048 static inline int btrfs_acl_chmod(struct inode
*inode
)
3055 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3056 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3057 struct btrfs_root
*root
);
3058 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3059 struct btrfs_root
*root
);
3060 int btrfs_recover_relocation(struct btrfs_root
*root
);
3061 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3062 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3063 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3064 struct extent_buffer
*cow
);
3065 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
3066 struct btrfs_pending_snapshot
*pending
,
3067 u64
*bytes_to_reserve
);
3068 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3069 struct btrfs_pending_snapshot
*pending
);
3072 int btrfs_scrub_dev(struct btrfs_root
*root
, u64 devid
, u64 start
, u64 end
,
3073 struct btrfs_scrub_progress
*progress
, int readonly
);
3074 void btrfs_scrub_pause(struct btrfs_root
*root
);
3075 void btrfs_scrub_pause_super(struct btrfs_root
*root
);
3076 void btrfs_scrub_continue(struct btrfs_root
*root
);
3077 void btrfs_scrub_continue_super(struct btrfs_root
*root
);
3078 int __btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3079 int btrfs_scrub_cancel(struct btrfs_root
*root
);
3080 int btrfs_scrub_cancel_dev(struct btrfs_root
*root
, struct btrfs_device
*dev
);
3081 int btrfs_scrub_cancel_devid(struct btrfs_root
*root
, u64 devid
);
3082 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
3083 struct btrfs_scrub_progress
*progress
);
3086 struct reada_control
{
3087 struct btrfs_root
*root
; /* tree to prefetch */
3088 struct btrfs_key key_start
;
3089 struct btrfs_key key_end
; /* exclusive */
3092 wait_queue_head_t wait
;
3094 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3095 struct btrfs_key
*start
, struct btrfs_key
*end
);
3096 int btrfs_reada_wait(void *handle
);
3097 void btrfs_reada_detach(void *handle
);
3098 int btree_readahead_hook(struct btrfs_root
*root
, struct extent_buffer
*eb
,
3099 u64 start
, int err
);