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 "extent_io.h"
34 #include "extent_map.h"
35 #include "async-thread.h"
38 struct btrfs_trans_handle
;
39 struct btrfs_transaction
;
40 struct btrfs_pending_snapshot
;
41 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
42 extern struct kmem_cache
*btrfs_transaction_cachep
;
43 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
44 extern struct kmem_cache
*btrfs_path_cachep
;
45 extern struct kmem_cache
*btrfs_free_space_cachep
;
46 struct btrfs_ordered_sum
;
48 #define BTRFS_MAGIC "_BHRfS_M"
50 #define BTRFS_MAX_LEVEL 8
52 #define BTRFS_COMPAT_EXTENT_TREE_V0
55 * files bigger than this get some pre-flushing when they are added
56 * to the ordered operations list. That way we limit the total
57 * work done by the commit
59 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
61 /* holds pointers to all of the tree roots */
62 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
64 /* stores information about which extents are in use, and reference counts */
65 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
68 * chunk tree stores translations from logical -> physical block numbering
69 * the super block points to the chunk tree
71 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
74 * stores information about which areas of a given device are in use.
75 * one per device. The tree of tree roots points to the device tree
77 #define BTRFS_DEV_TREE_OBJECTID 4ULL
79 /* one per subvolume, storing files and directories */
80 #define BTRFS_FS_TREE_OBJECTID 5ULL
82 /* directory objectid inside the root tree */
83 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
85 /* holds checksums of all the data extents */
86 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
88 /* orhpan objectid for tracking unlinked/truncated files */
89 #define BTRFS_ORPHAN_OBJECTID -5ULL
91 /* does write ahead logging to speed up fsyncs */
92 #define BTRFS_TREE_LOG_OBJECTID -6ULL
93 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
95 /* for space balancing */
96 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
97 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
100 * extent checksums all have this objectid
101 * this allows them to share the logging tree
104 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
106 /* For storing free space cache */
107 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
110 * The inode number assigned to the special inode for sotring
113 #define BTRFS_FREE_INO_OBJECTID -12ULL
115 /* dummy objectid represents multiple objectids */
116 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
119 * All files have objectids in this range.
121 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
122 #define BTRFS_LAST_FREE_OBJECTID -256ULL
123 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
127 * the device items go into the chunk tree. The key is in the form
128 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
130 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
132 #define BTRFS_BTREE_INODE_OBJECTID 1
134 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
137 * we can actually store much bigger names, but lets not confuse the rest
140 #define BTRFS_NAME_LEN 255
142 /* 32 bytes in various csum fields */
143 #define BTRFS_CSUM_SIZE 32
146 #define BTRFS_CSUM_TYPE_CRC32 0
148 static int btrfs_csum_sizes
[] = { 4, 0 };
150 /* four bytes for CRC32 */
151 #define BTRFS_EMPTY_DIR_SIZE 0
153 #define BTRFS_FT_UNKNOWN 0
154 #define BTRFS_FT_REG_FILE 1
155 #define BTRFS_FT_DIR 2
156 #define BTRFS_FT_CHRDEV 3
157 #define BTRFS_FT_BLKDEV 4
158 #define BTRFS_FT_FIFO 5
159 #define BTRFS_FT_SOCK 6
160 #define BTRFS_FT_SYMLINK 7
161 #define BTRFS_FT_XATTR 8
162 #define BTRFS_FT_MAX 9
165 * The key defines the order in the tree, and so it also defines (optimal)
168 * objectid corresponds to the inode number.
170 * type tells us things about the object, and is a kind of stream selector.
171 * so for a given inode, keys with type of 1 might refer to the inode data,
172 * type of 2 may point to file data in the btree and type == 3 may point to
175 * offset is the starting byte offset for this key in the stream.
177 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
178 * in cpu native order. Otherwise they are identical and their sizes
179 * should be the same (ie both packed)
181 struct btrfs_disk_key
{
185 } __attribute__ ((__packed__
));
191 } __attribute__ ((__packed__
));
193 struct btrfs_mapping_tree
{
194 struct extent_map_tree map_tree
;
197 struct btrfs_dev_item
{
198 /* the internal btrfs device id */
201 /* size of the device */
207 /* optimal io alignment for this device */
210 /* optimal io width for this device */
213 /* minimal io size for this device */
216 /* type and info about this device */
219 /* expected generation for this device */
223 * starting byte of this partition on the device,
224 * to allow for stripe alignment in the future
228 /* grouping information for allocation decisions */
231 /* seek speed 0-100 where 100 is fastest */
234 /* bandwidth 0-100 where 100 is fastest */
237 /* btrfs generated uuid for this device */
238 u8 uuid
[BTRFS_UUID_SIZE
];
240 /* uuid of FS who owns this device */
241 u8 fsid
[BTRFS_UUID_SIZE
];
242 } __attribute__ ((__packed__
));
244 struct btrfs_stripe
{
247 u8 dev_uuid
[BTRFS_UUID_SIZE
];
248 } __attribute__ ((__packed__
));
251 /* size of this chunk in bytes */
254 /* objectid of the root referencing this chunk */
260 /* optimal io alignment for this chunk */
263 /* optimal io width for this chunk */
266 /* minimal io size for this chunk */
269 /* 2^16 stripes is quite a lot, a second limit is the size of a single
274 /* sub stripes only matter for raid10 */
276 struct btrfs_stripe stripe
;
277 /* additional stripes go here */
278 } __attribute__ ((__packed__
));
280 #define BTRFS_FREE_SPACE_EXTENT 1
281 #define BTRFS_FREE_SPACE_BITMAP 2
283 struct btrfs_free_space_entry
{
287 } __attribute__ ((__packed__
));
289 struct btrfs_free_space_header
{
290 struct btrfs_disk_key location
;
294 } __attribute__ ((__packed__
));
296 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
298 BUG_ON(num_stripes
== 0);
299 return sizeof(struct btrfs_chunk
) +
300 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
303 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
304 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
310 /* Errors detected */
311 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
313 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
314 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
316 #define BTRFS_BACKREF_REV_MAX 256
317 #define BTRFS_BACKREF_REV_SHIFT 56
318 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
319 BTRFS_BACKREF_REV_SHIFT)
321 #define BTRFS_OLD_BACKREF_REV 0
322 #define BTRFS_MIXED_BACKREF_REV 1
325 * every tree block (leaf or node) starts with this header.
327 struct btrfs_header
{
328 /* these first four must match the super block */
329 u8 csum
[BTRFS_CSUM_SIZE
];
330 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
331 __le64 bytenr
; /* which block this node is supposed to live in */
334 /* allowed to be different from the super from here on down */
335 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
340 } __attribute__ ((__packed__
));
342 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
343 sizeof(struct btrfs_header)) / \
344 sizeof(struct btrfs_key_ptr))
345 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
346 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
347 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
348 sizeof(struct btrfs_item) - \
349 sizeof(struct btrfs_file_extent_item))
350 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
351 sizeof(struct btrfs_item) -\
352 sizeof(struct btrfs_dir_item))
356 * this is a very generous portion of the super block, giving us
357 * room to translate 14 chunks with 3 stripes each.
359 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
360 #define BTRFS_LABEL_SIZE 256
363 * the super block basically lists the main trees of the FS
364 * it currently lacks any block count etc etc
366 struct btrfs_super_block
{
367 u8 csum
[BTRFS_CSUM_SIZE
];
368 /* the first 4 fields must match struct btrfs_header */
369 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
370 __le64 bytenr
; /* this block number */
373 /* allowed to be different from the btrfs_header from here own down */
380 /* this will help find the new super based on the log root */
381 __le64 log_root_transid
;
384 __le64 root_dir_objectid
;
390 __le32 sys_chunk_array_size
;
391 __le64 chunk_root_generation
;
393 __le64 compat_ro_flags
;
394 __le64 incompat_flags
;
399 struct btrfs_dev_item dev_item
;
401 char label
[BTRFS_LABEL_SIZE
];
403 __le64 cache_generation
;
405 /* future expansion */
407 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
408 } __attribute__ ((__packed__
));
411 * Compat flags that we support. If any incompat flags are set other than the
412 * ones specified below then we will fail to mount
414 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
415 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
416 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
417 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
419 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
420 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
421 #define BTRFS_FEATURE_INCOMPAT_SUPP \
422 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
423 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
424 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
425 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
428 * A leaf is full of items. offset and size tell us where to find
429 * the item in the leaf (relative to the start of the data area)
432 struct btrfs_disk_key key
;
435 } __attribute__ ((__packed__
));
438 * leaves have an item area and a data area:
439 * [item0, item1....itemN] [free space] [dataN...data1, data0]
441 * The data is separate from the items to get the keys closer together
445 struct btrfs_header header
;
446 struct btrfs_item items
[];
447 } __attribute__ ((__packed__
));
450 * all non-leaf blocks are nodes, they hold only keys and pointers to
453 struct btrfs_key_ptr
{
454 struct btrfs_disk_key key
;
457 } __attribute__ ((__packed__
));
460 struct btrfs_header header
;
461 struct btrfs_key_ptr ptrs
[];
462 } __attribute__ ((__packed__
));
465 * btrfs_paths remember the path taken from the root down to the leaf.
466 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
467 * to any other levels that are present.
469 * The slots array records the index of the item or block pointer
470 * used while walking the tree.
473 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
474 int slots
[BTRFS_MAX_LEVEL
];
475 /* if there is real range locking, this locks field will change */
476 int locks
[BTRFS_MAX_LEVEL
];
478 /* keep some upper locks as we walk down */
482 * set by btrfs_split_item, tells search_slot to keep all locks
483 * and to force calls to keep space in the nodes
485 unsigned int search_for_split
:1;
486 unsigned int keep_locks
:1;
487 unsigned int skip_locking
:1;
488 unsigned int leave_spinning
:1;
489 unsigned int search_commit_root
:1;
493 * items in the extent btree are used to record the objectid of the
494 * owner of the block and the number of references
497 struct btrfs_extent_item
{
501 } __attribute__ ((__packed__
));
503 struct btrfs_extent_item_v0
{
505 } __attribute__ ((__packed__
));
507 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
508 sizeof(struct btrfs_item))
510 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
511 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
513 /* following flags only apply to tree blocks */
515 /* use full backrefs for extent pointers in the block */
516 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
519 * this flag is only used internally by scrub and may be changed at any time
520 * it is only declared here to avoid collisions
522 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
524 struct btrfs_tree_block_info
{
525 struct btrfs_disk_key key
;
527 } __attribute__ ((__packed__
));
529 struct btrfs_extent_data_ref
{
534 } __attribute__ ((__packed__
));
536 struct btrfs_shared_data_ref
{
538 } __attribute__ ((__packed__
));
540 struct btrfs_extent_inline_ref
{
543 } __attribute__ ((__packed__
));
545 /* old style backrefs item */
546 struct btrfs_extent_ref_v0
{
551 } __attribute__ ((__packed__
));
554 /* dev extents record free space on individual devices. The owner
555 * field points back to the chunk allocation mapping tree that allocated
556 * the extent. The chunk tree uuid field is a way to double check the owner
558 struct btrfs_dev_extent
{
560 __le64 chunk_objectid
;
563 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
564 } __attribute__ ((__packed__
));
566 struct btrfs_inode_ref
{
570 } __attribute__ ((__packed__
));
572 struct btrfs_timespec
{
575 } __attribute__ ((__packed__
));
577 enum btrfs_compression_type
{
578 BTRFS_COMPRESS_NONE
= 0,
579 BTRFS_COMPRESS_ZLIB
= 1,
580 BTRFS_COMPRESS_LZO
= 2,
581 BTRFS_COMPRESS_TYPES
= 2,
582 BTRFS_COMPRESS_LAST
= 3,
585 struct btrfs_inode_item
{
586 /* nfs style generation number */
588 /* transid that last touched this inode */
600 /* modification sequence number for NFS */
604 * a little future expansion, for more than this we can
605 * just grow the inode item and version it
608 struct btrfs_timespec atime
;
609 struct btrfs_timespec ctime
;
610 struct btrfs_timespec mtime
;
611 struct btrfs_timespec otime
;
612 } __attribute__ ((__packed__
));
614 struct btrfs_dir_log_item
{
616 } __attribute__ ((__packed__
));
618 struct btrfs_dir_item
{
619 struct btrfs_disk_key location
;
624 } __attribute__ ((__packed__
));
626 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
628 struct btrfs_root_item
{
629 struct btrfs_inode_item inode
;
635 __le64 last_snapshot
;
638 struct btrfs_disk_key drop_progress
;
641 } __attribute__ ((__packed__
));
644 * this is used for both forward and backward root refs
646 struct btrfs_root_ref
{
650 } __attribute__ ((__packed__
));
652 #define BTRFS_FILE_EXTENT_INLINE 0
653 #define BTRFS_FILE_EXTENT_REG 1
654 #define BTRFS_FILE_EXTENT_PREALLOC 2
656 struct btrfs_file_extent_item
{
658 * transaction id that created this extent
662 * max number of bytes to hold this extent in ram
663 * when we split a compressed extent we can't know how big
664 * each of the resulting pieces will be. So, this is
665 * an upper limit on the size of the extent in ram instead of
671 * 32 bits for the various ways we might encode the data,
672 * including compression and encryption. If any of these
673 * are set to something a given disk format doesn't understand
674 * it is treated like an incompat flag for reading and writing,
679 __le16 other_encoding
; /* spare for later use */
681 /* are we inline data or a real extent? */
685 * disk space consumed by the extent, checksum blocks are included
689 __le64 disk_num_bytes
;
691 * the logical offset in file blocks (no csums)
692 * this extent record is for. This allows a file extent to point
693 * into the middle of an existing extent on disk, sharing it
694 * between two snapshots (useful if some bytes in the middle of the
695 * extent have changed
699 * the logical number of file blocks (no csums included). This
700 * always reflects the size uncompressed and without encoding.
704 } __attribute__ ((__packed__
));
706 struct btrfs_csum_item
{
708 } __attribute__ ((__packed__
));
710 /* different types of block groups (and chunks) */
711 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
712 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
713 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
714 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
715 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
716 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
717 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
718 #define BTRFS_NR_RAID_TYPES 5
720 struct btrfs_block_group_item
{
722 __le64 chunk_objectid
;
724 } __attribute__ ((__packed__
));
726 struct btrfs_space_info
{
729 u64 total_bytes
; /* total bytes in the space,
730 this doesn't take mirrors into account */
731 u64 bytes_used
; /* total bytes used,
732 this doesn't take mirrors into account */
733 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
734 transaction finishes */
735 u64 bytes_reserved
; /* total bytes the allocator has reserved for
736 current allocations */
737 u64 bytes_readonly
; /* total bytes that are read only */
739 u64 bytes_may_use
; /* number of bytes that may be used for
740 delalloc/allocations */
741 u64 disk_used
; /* total bytes used on disk */
742 u64 disk_total
; /* total bytes on disk, takes mirrors into
746 * we bump reservation progress every time we decrement
747 * bytes_reserved. This way people waiting for reservations
748 * know something good has happened and they can check
749 * for progress. The number here isn't to be trusted, it
750 * just shows reclaim activity
752 unsigned long reservation_progress
;
754 unsigned int full
:1; /* indicates that we cannot allocate any more
755 chunks for this space */
756 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
758 unsigned int force_alloc
; /* set if we need to force a chunk
759 alloc for this space */
761 struct list_head list
;
763 /* for block groups in our same type */
764 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
766 struct rw_semaphore groups_sem
;
767 atomic_t caching_threads
;
770 struct btrfs_block_rsv
{
774 struct btrfs_space_info
*space_info
;
775 struct list_head list
;
778 unsigned int priority
:8;
779 unsigned int durable
:1;
780 unsigned int refill_used
:1;
785 * free clusters are used to claim free space in relatively large chunks,
786 * allowing us to do less seeky writes. They are used for all metadata
787 * allocations and data allocations in ssd mode.
789 struct btrfs_free_cluster
{
791 spinlock_t refill_lock
;
794 /* largest extent in this cluster */
797 /* first extent starting offset */
800 struct btrfs_block_group_cache
*block_group
;
802 * when a cluster is allocated from a block group, we put the
803 * cluster onto a list in the block group so that it can
804 * be freed before the block group is freed.
806 struct list_head block_group_list
;
809 enum btrfs_caching_type
{
811 BTRFS_CACHE_STARTED
= 1,
812 BTRFS_CACHE_FINISHED
= 2,
815 enum btrfs_disk_cache_state
{
816 BTRFS_DC_WRITTEN
= 0,
820 BTRFS_DC_NEED_WRITE
= 4,
823 struct btrfs_caching_control
{
824 struct list_head list
;
826 wait_queue_head_t wait
;
827 struct btrfs_block_group_cache
*block_group
;
832 struct btrfs_block_group_cache
{
833 struct btrfs_key key
;
834 struct btrfs_block_group_item item
;
835 struct btrfs_fs_info
*fs_info
;
845 unsigned int dirty
:1;
848 int disk_cache_state
;
850 /* cache tracking stuff */
852 struct btrfs_caching_control
*caching_ctl
;
853 u64 last_byte_to_unpin
;
855 struct btrfs_space_info
*space_info
;
857 /* free space cache stuff */
858 struct btrfs_free_space_ctl
*free_space_ctl
;
860 /* block group cache stuff */
861 struct rb_node cache_node
;
863 /* for block groups in the same raid type */
864 struct list_head list
;
869 /* List of struct btrfs_free_clusters for this block group.
870 * Today it will only have one thing on it, but that may change
872 struct list_head cluster_list
;
875 struct reloc_control
;
877 struct btrfs_fs_devices
;
878 struct btrfs_delayed_root
;
879 struct btrfs_fs_info
{
880 u8 fsid
[BTRFS_FSID_SIZE
];
881 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
882 struct btrfs_root
*extent_root
;
883 struct btrfs_root
*tree_root
;
884 struct btrfs_root
*chunk_root
;
885 struct btrfs_root
*dev_root
;
886 struct btrfs_root
*fs_root
;
887 struct btrfs_root
*csum_root
;
889 /* the log root tree is a directory of all the other log roots */
890 struct btrfs_root
*log_root_tree
;
892 spinlock_t fs_roots_radix_lock
;
893 struct radix_tree_root fs_roots_radix
;
895 /* block group cache stuff */
896 spinlock_t block_group_cache_lock
;
897 struct rb_root block_group_cache_tree
;
899 struct extent_io_tree freed_extents
[2];
900 struct extent_io_tree
*pinned_extents
;
902 /* logical->physical extent mapping */
903 struct btrfs_mapping_tree mapping_tree
;
906 * block reservation for extent, checksum, root tree and
907 * delayed dir index item
909 struct btrfs_block_rsv global_block_rsv
;
910 /* block reservation for delay allocation */
911 struct btrfs_block_rsv delalloc_block_rsv
;
912 /* block reservation for metadata operations */
913 struct btrfs_block_rsv trans_block_rsv
;
914 /* block reservation for chunk tree */
915 struct btrfs_block_rsv chunk_block_rsv
;
917 struct btrfs_block_rsv empty_block_rsv
;
919 /* list of block reservations that cross multiple transactions */
920 struct list_head durable_block_rsv_list
;
922 struct mutex durable_block_rsv_mutex
;
925 u64 last_trans_committed
;
928 * this is updated to the current trans every time a full commit
929 * is required instead of the faster short fsync log commits
931 u64 last_trans_log_full_commit
;
932 unsigned long mount_opt
:20;
933 unsigned long compress_type
:4;
936 struct btrfs_transaction
*running_transaction
;
937 wait_queue_head_t transaction_throttle
;
938 wait_queue_head_t transaction_wait
;
939 wait_queue_head_t transaction_blocked_wait
;
940 wait_queue_head_t async_submit_wait
;
942 struct btrfs_super_block super_copy
;
943 struct btrfs_super_block super_for_commit
;
944 struct block_device
*__bdev
;
945 struct super_block
*sb
;
946 struct inode
*btree_inode
;
947 struct backing_dev_info bdi
;
948 struct mutex tree_log_mutex
;
949 struct mutex transaction_kthread_mutex
;
950 struct mutex cleaner_mutex
;
951 struct mutex chunk_mutex
;
952 struct mutex volume_mutex
;
954 * this protects the ordered operations list only while we are
955 * processing all of the entries on it. This way we make
956 * sure the commit code doesn't find the list temporarily empty
957 * because another function happens to be doing non-waiting preflush
958 * before jumping into the main commit.
960 struct mutex ordered_operations_mutex
;
961 struct rw_semaphore extent_commit_sem
;
963 struct rw_semaphore cleanup_work_sem
;
965 struct rw_semaphore subvol_sem
;
966 struct srcu_struct subvol_srcu
;
968 spinlock_t trans_lock
;
970 * the reloc mutex goes with the trans lock, it is taken
971 * during commit to protect us from the relocation code
973 struct mutex reloc_mutex
;
975 struct list_head trans_list
;
976 struct list_head hashers
;
977 struct list_head dead_roots
;
978 struct list_head caching_block_groups
;
980 spinlock_t delayed_iput_lock
;
981 struct list_head delayed_iputs
;
983 atomic_t nr_async_submits
;
984 atomic_t async_submit_draining
;
985 atomic_t nr_async_bios
;
986 atomic_t async_delalloc_pages
;
987 atomic_t open_ioctl_trans
;
990 * this is used by the balancing code to wait for all the pending
993 spinlock_t ordered_extent_lock
;
996 * all of the data=ordered extents pending writeback
997 * these can span multiple transactions and basically include
998 * every dirty data page that isn't from nodatacow
1000 struct list_head ordered_extents
;
1003 * all of the inodes that have delalloc bytes. It is possible for
1004 * this list to be empty even when there is still dirty data=ordered
1005 * extents waiting to finish IO.
1007 struct list_head delalloc_inodes
;
1010 * special rename and truncate targets that must be on disk before
1011 * we're allowed to commit. This is basically the ext3 style
1012 * data=ordered list.
1014 struct list_head ordered_operations
;
1017 * there is a pool of worker threads for checksumming during writes
1018 * and a pool for checksumming after reads. This is because readers
1019 * can run with FS locks held, and the writers may be waiting for
1020 * those locks. We don't want ordering in the pending list to cause
1021 * deadlocks, and so the two are serviced separately.
1023 * A third pool does submit_bio to avoid deadlocking with the other
1026 struct btrfs_workers generic_worker
;
1027 struct btrfs_workers workers
;
1028 struct btrfs_workers delalloc_workers
;
1029 struct btrfs_workers endio_workers
;
1030 struct btrfs_workers endio_meta_workers
;
1031 struct btrfs_workers endio_meta_write_workers
;
1032 struct btrfs_workers endio_write_workers
;
1033 struct btrfs_workers endio_freespace_worker
;
1034 struct btrfs_workers submit_workers
;
1036 * fixup workers take dirty pages that didn't properly go through
1037 * the cow mechanism and make them safe to write. It happens
1038 * for the sys_munmap function call path
1040 struct btrfs_workers fixup_workers
;
1041 struct btrfs_workers delayed_workers
;
1042 struct task_struct
*transaction_kthread
;
1043 struct task_struct
*cleaner_kthread
;
1044 int thread_pool_size
;
1046 struct kobject super_kobj
;
1047 struct completion kobj_unregister
;
1050 int log_root_recovering
;
1056 /* protected by the delalloc lock, used to keep from writing
1057 * metadata until there is a nice batch
1059 u64 dirty_metadata_bytes
;
1060 struct list_head dirty_cowonly_roots
;
1062 struct btrfs_fs_devices
*fs_devices
;
1065 * the space_info list is almost entirely read only. It only changes
1066 * when we add a new raid type to the FS, and that happens
1067 * very rarely. RCU is used to protect it.
1069 struct list_head space_info
;
1071 struct reloc_control
*reloc_ctl
;
1073 spinlock_t delalloc_lock
;
1076 /* data_alloc_cluster is only used in ssd mode */
1077 struct btrfs_free_cluster data_alloc_cluster
;
1079 /* all metadata allocations go through this cluster */
1080 struct btrfs_free_cluster meta_alloc_cluster
;
1082 /* auto defrag inodes go here */
1083 spinlock_t defrag_inodes_lock
;
1084 struct rb_root defrag_inodes
;
1085 atomic_t defrag_running
;
1087 spinlock_t ref_cache_lock
;
1088 u64 total_ref_cache_size
;
1090 u64 avail_data_alloc_bits
;
1091 u64 avail_metadata_alloc_bits
;
1092 u64 avail_system_alloc_bits
;
1093 u64 data_alloc_profile
;
1094 u64 metadata_alloc_profile
;
1095 u64 system_alloc_profile
;
1097 unsigned data_chunk_allocations
;
1098 unsigned metadata_ratio
;
1102 /* private scrub information */
1103 struct mutex scrub_lock
;
1104 atomic_t scrubs_running
;
1105 atomic_t scrub_pause_req
;
1106 atomic_t scrubs_paused
;
1107 atomic_t scrub_cancel_req
;
1108 wait_queue_head_t scrub_pause_wait
;
1109 struct rw_semaphore scrub_super_lock
;
1110 int scrub_workers_refcnt
;
1111 struct btrfs_workers scrub_workers
;
1113 /* filesystem state */
1116 struct btrfs_delayed_root
*delayed_root
;
1120 * in ram representation of the tree. extent_root is used for all allocations
1121 * and for the extent tree extent_root root.
1124 struct extent_buffer
*node
;
1126 struct extent_buffer
*commit_root
;
1127 struct btrfs_root
*log_root
;
1128 struct btrfs_root
*reloc_root
;
1130 struct btrfs_root_item root_item
;
1131 struct btrfs_key root_key
;
1132 struct btrfs_fs_info
*fs_info
;
1133 struct extent_io_tree dirty_log_pages
;
1135 struct kobject root_kobj
;
1136 struct completion kobj_unregister
;
1137 struct mutex objectid_mutex
;
1139 spinlock_t accounting_lock
;
1140 struct btrfs_block_rsv
*block_rsv
;
1142 /* free ino cache stuff */
1143 struct mutex fs_commit_mutex
;
1144 struct btrfs_free_space_ctl
*free_ino_ctl
;
1145 enum btrfs_caching_type cached
;
1146 spinlock_t cache_lock
;
1147 wait_queue_head_t cache_wait
;
1148 struct btrfs_free_space_ctl
*free_ino_pinned
;
1150 struct inode
*cache_inode
;
1152 struct mutex log_mutex
;
1153 wait_queue_head_t log_writer_wait
;
1154 wait_queue_head_t log_commit_wait
[2];
1155 atomic_t log_writers
;
1156 atomic_t log_commit
[2];
1157 unsigned long log_transid
;
1158 unsigned long last_log_commit
;
1159 unsigned long log_batch
;
1160 pid_t log_start_pid
;
1161 bool log_multiple_pids
;
1166 /* data allocations are done in sectorsize units */
1169 /* node allocations are done in nodesize units */
1172 /* leaf allocations are done in leafsize units */
1179 u64 highest_objectid
;
1181 /* btrfs_record_root_in_trans is a multi-step process,
1182 * and it can race with the balancing code. But the
1183 * race is very small, and only the first time the root
1184 * is added to each transaction. So in_trans_setup
1185 * is used to tell us when more checks are required
1187 unsigned long in_trans_setup
;
1192 u64 defrag_trans_start
;
1193 struct btrfs_key defrag_progress
;
1194 struct btrfs_key defrag_max
;
1198 /* the dirty list is only used by non-reference counted roots */
1199 struct list_head dirty_list
;
1201 struct list_head root_list
;
1203 spinlock_t orphan_lock
;
1204 struct list_head orphan_list
;
1205 struct btrfs_block_rsv
*orphan_block_rsv
;
1206 int orphan_item_inserted
;
1207 int orphan_cleanup_state
;
1209 spinlock_t inode_lock
;
1210 /* red-black tree that keeps track of in-memory inodes */
1211 struct rb_root inode_tree
;
1214 * radix tree that keeps track of delayed nodes of every inode,
1215 * protected by inode_lock
1217 struct radix_tree_root delayed_nodes_tree
;
1219 * right now this just gets used so that a root has its own devid
1220 * for stat. It may be used for more later
1222 struct super_block anon_super
;
1225 struct btrfs_ioctl_defrag_range_args
{
1226 /* start of the defrag operation */
1229 /* number of bytes to defrag, use (u64)-1 to say all */
1233 * flags for the operation, which can include turning
1234 * on compression for this one defrag
1239 * any extent bigger than this will be considered
1240 * already defragged. Use 0 to take the kernel default
1241 * Use 1 to say every single extent must be rewritten
1243 __u32 extent_thresh
;
1246 * which compression method to use if turning on compression
1247 * for this defrag operation. If unspecified, zlib will
1250 __u32 compress_type
;
1252 /* spare for later */
1258 * inode items have the data typically returned from stat and store other
1259 * info about object characteristics. There is one for every file and dir in
1262 #define BTRFS_INODE_ITEM_KEY 1
1263 #define BTRFS_INODE_REF_KEY 12
1264 #define BTRFS_XATTR_ITEM_KEY 24
1265 #define BTRFS_ORPHAN_ITEM_KEY 48
1266 /* reserve 2-15 close to the inode for later flexibility */
1269 * dir items are the name -> inode pointers in a directory. There is one
1270 * for every name in a directory.
1272 #define BTRFS_DIR_LOG_ITEM_KEY 60
1273 #define BTRFS_DIR_LOG_INDEX_KEY 72
1274 #define BTRFS_DIR_ITEM_KEY 84
1275 #define BTRFS_DIR_INDEX_KEY 96
1277 * extent data is for file data
1279 #define BTRFS_EXTENT_DATA_KEY 108
1282 * extent csums are stored in a separate tree and hold csums for
1283 * an entire extent on disk.
1285 #define BTRFS_EXTENT_CSUM_KEY 128
1288 * root items point to tree roots. They are typically in the root
1289 * tree used by the super block to find all the other trees
1291 #define BTRFS_ROOT_ITEM_KEY 132
1294 * root backrefs tie subvols and snapshots to the directory entries that
1297 #define BTRFS_ROOT_BACKREF_KEY 144
1300 * root refs make a fast index for listing all of the snapshots and
1301 * subvolumes referenced by a given root. They point directly to the
1302 * directory item in the root that references the subvol
1304 #define BTRFS_ROOT_REF_KEY 156
1307 * extent items are in the extent map tree. These record which blocks
1308 * are used, and how many references there are to each block
1310 #define BTRFS_EXTENT_ITEM_KEY 168
1312 #define BTRFS_TREE_BLOCK_REF_KEY 176
1314 #define BTRFS_EXTENT_DATA_REF_KEY 178
1316 #define BTRFS_EXTENT_REF_V0_KEY 180
1318 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1320 #define BTRFS_SHARED_DATA_REF_KEY 184
1323 * block groups give us hints into the extent allocation trees. Which
1324 * blocks are free etc etc
1326 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1328 #define BTRFS_DEV_EXTENT_KEY 204
1329 #define BTRFS_DEV_ITEM_KEY 216
1330 #define BTRFS_CHUNK_ITEM_KEY 228
1333 * string items are for debugging. They just store a short string of
1336 #define BTRFS_STRING_ITEM_KEY 253
1339 * Flags for mount options.
1341 * Note: don't forget to add new options to btrfs_show_options()
1343 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1344 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1345 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1346 #define BTRFS_MOUNT_SSD (1 << 3)
1347 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1348 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1349 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1350 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1351 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1352 #define BTRFS_MOUNT_NOSSD (1 << 9)
1353 #define BTRFS_MOUNT_DISCARD (1 << 10)
1354 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1355 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1356 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1357 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1358 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1359 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1360 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1362 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1363 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1364 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1369 #define BTRFS_INODE_NODATASUM (1 << 0)
1370 #define BTRFS_INODE_NODATACOW (1 << 1)
1371 #define BTRFS_INODE_READONLY (1 << 2)
1372 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1373 #define BTRFS_INODE_PREALLOC (1 << 4)
1374 #define BTRFS_INODE_SYNC (1 << 5)
1375 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1376 #define BTRFS_INODE_APPEND (1 << 7)
1377 #define BTRFS_INODE_NODUMP (1 << 8)
1378 #define BTRFS_INODE_NOATIME (1 << 9)
1379 #define BTRFS_INODE_DIRSYNC (1 << 10)
1380 #define BTRFS_INODE_COMPRESS (1 << 11)
1382 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1384 /* some macros to generate set/get funcs for the struct fields. This
1385 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1388 #define le8_to_cpu(v) (v)
1389 #define cpu_to_le8(v) (v)
1392 #define read_eb_member(eb, ptr, type, member, result) ( \
1393 read_extent_buffer(eb, (char *)(result), \
1394 ((unsigned long)(ptr)) + \
1395 offsetof(type, member), \
1396 sizeof(((type *)0)->member)))
1398 #define write_eb_member(eb, ptr, type, member, result) ( \
1399 write_extent_buffer(eb, (char *)(result), \
1400 ((unsigned long)(ptr)) + \
1401 offsetof(type, member), \
1402 sizeof(((type *)0)->member)))
1404 #ifndef BTRFS_SETGET_FUNCS
1405 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1406 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1407 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1410 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1411 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1413 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1414 u##bits res = le##bits##_to_cpu(p->member); \
1415 kunmap_atomic(p, KM_USER0); \
1418 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1421 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1422 p->member = cpu_to_le##bits(val); \
1423 kunmap_atomic(p, KM_USER0); \
1426 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1427 static inline u##bits btrfs_##name(type *s) \
1429 return le##bits##_to_cpu(s->member); \
1431 static inline void btrfs_set_##name(type *s, u##bits val) \
1433 s->member = cpu_to_le##bits(val); \
1436 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1437 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1438 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1439 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1440 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1441 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1443 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1444 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1445 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1446 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1447 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1448 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1450 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1451 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1453 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1455 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1457 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1459 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1461 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1462 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1464 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1466 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1468 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1471 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1473 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1476 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1478 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1481 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1482 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1483 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1484 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1485 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1486 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1487 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1488 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1489 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1490 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1491 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1493 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1495 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1498 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1499 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1500 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1502 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1504 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1506 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1508 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1509 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1511 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1513 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1514 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1516 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1519 unsigned long offset
= (unsigned long)c
;
1520 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1521 offset
+= nr
* sizeof(struct btrfs_stripe
);
1522 return (struct btrfs_stripe
*)offset
;
1525 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1527 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1530 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1531 struct btrfs_chunk
*c
, int nr
)
1533 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1536 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1537 struct btrfs_chunk
*c
, int nr
)
1539 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1542 /* struct btrfs_block_group_item */
1543 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1545 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1547 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1548 struct btrfs_block_group_item
, chunk_objectid
, 64);
1550 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1551 struct btrfs_block_group_item
, chunk_objectid
, 64);
1552 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1553 struct btrfs_block_group_item
, flags
, 64);
1554 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1555 struct btrfs_block_group_item
, flags
, 64);
1557 /* struct btrfs_inode_ref */
1558 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1559 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1561 /* struct btrfs_inode_item */
1562 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1563 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1564 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1565 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1566 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1567 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1568 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1569 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1570 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1571 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1572 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1573 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1575 static inline struct btrfs_timespec
*
1576 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1578 unsigned long ptr
= (unsigned long)inode_item
;
1579 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1580 return (struct btrfs_timespec
*)ptr
;
1583 static inline struct btrfs_timespec
*
1584 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1586 unsigned long ptr
= (unsigned long)inode_item
;
1587 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1588 return (struct btrfs_timespec
*)ptr
;
1591 static inline struct btrfs_timespec
*
1592 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1594 unsigned long ptr
= (unsigned long)inode_item
;
1595 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1596 return (struct btrfs_timespec
*)ptr
;
1599 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1600 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1602 /* struct btrfs_dev_extent */
1603 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1605 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1606 chunk_objectid
, 64);
1607 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1609 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1611 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1613 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1614 return (u8
*)((unsigned long)dev
+ ptr
);
1617 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1618 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1620 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1622 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1625 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1627 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1628 struct btrfs_tree_block_info
*item
,
1629 struct btrfs_disk_key
*key
)
1631 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1634 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1635 struct btrfs_tree_block_info
*item
,
1636 struct btrfs_disk_key
*key
)
1638 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1641 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1643 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1645 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1647 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1650 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1653 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1655 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1658 static inline u32
btrfs_extent_inline_ref_size(int type
)
1660 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1661 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1662 return sizeof(struct btrfs_extent_inline_ref
);
1663 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1664 return sizeof(struct btrfs_shared_data_ref
) +
1665 sizeof(struct btrfs_extent_inline_ref
);
1666 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1667 return sizeof(struct btrfs_extent_data_ref
) +
1668 offsetof(struct btrfs_extent_inline_ref
, offset
);
1673 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1674 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1676 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1677 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1679 /* struct btrfs_node */
1680 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1681 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1683 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1686 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1687 sizeof(struct btrfs_key_ptr
) * nr
;
1688 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1691 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1695 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1696 sizeof(struct btrfs_key_ptr
) * nr
;
1697 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1700 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1703 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1704 sizeof(struct btrfs_key_ptr
) * nr
;
1705 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1708 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1712 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1713 sizeof(struct btrfs_key_ptr
) * nr
;
1714 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1717 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1719 return offsetof(struct btrfs_node
, ptrs
) +
1720 sizeof(struct btrfs_key_ptr
) * nr
;
1723 void btrfs_node_key(struct extent_buffer
*eb
,
1724 struct btrfs_disk_key
*disk_key
, int nr
);
1726 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1727 struct btrfs_disk_key
*disk_key
, int nr
)
1730 ptr
= btrfs_node_key_ptr_offset(nr
);
1731 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1732 struct btrfs_key_ptr
, key
, disk_key
);
1735 /* struct btrfs_item */
1736 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1737 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1739 static inline unsigned long btrfs_item_nr_offset(int nr
)
1741 return offsetof(struct btrfs_leaf
, items
) +
1742 sizeof(struct btrfs_item
) * nr
;
1745 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1748 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1751 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1752 struct btrfs_item
*item
)
1754 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1757 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1759 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1762 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1764 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1767 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1769 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1772 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1773 struct btrfs_disk_key
*disk_key
, int nr
)
1775 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1776 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1779 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1780 struct btrfs_disk_key
*disk_key
, int nr
)
1782 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1783 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1786 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1789 * struct btrfs_root_ref
1791 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1792 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1793 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1795 /* struct btrfs_dir_item */
1796 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1797 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1798 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1799 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1801 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1802 struct btrfs_dir_item
*item
,
1803 struct btrfs_disk_key
*key
)
1805 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1808 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1809 struct btrfs_dir_item
*item
,
1810 struct btrfs_disk_key
*key
)
1812 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1815 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1817 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1819 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1822 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1823 struct btrfs_free_space_header
*h
,
1824 struct btrfs_disk_key
*key
)
1826 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1829 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1830 struct btrfs_free_space_header
*h
,
1831 struct btrfs_disk_key
*key
)
1833 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1836 /* struct btrfs_disk_key */
1837 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1839 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1840 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1842 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1843 struct btrfs_disk_key
*disk
)
1845 cpu
->offset
= le64_to_cpu(disk
->offset
);
1846 cpu
->type
= disk
->type
;
1847 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1850 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1851 struct btrfs_key
*cpu
)
1853 disk
->offset
= cpu_to_le64(cpu
->offset
);
1854 disk
->type
= cpu
->type
;
1855 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1858 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1859 struct btrfs_key
*key
, int nr
)
1861 struct btrfs_disk_key disk_key
;
1862 btrfs_node_key(eb
, &disk_key
, nr
);
1863 btrfs_disk_key_to_cpu(key
, &disk_key
);
1866 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1867 struct btrfs_key
*key
, int nr
)
1869 struct btrfs_disk_key disk_key
;
1870 btrfs_item_key(eb
, &disk_key
, nr
);
1871 btrfs_disk_key_to_cpu(key
, &disk_key
);
1874 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1875 struct btrfs_dir_item
*item
,
1876 struct btrfs_key
*key
)
1878 struct btrfs_disk_key disk_key
;
1879 btrfs_dir_item_key(eb
, item
, &disk_key
);
1880 btrfs_disk_key_to_cpu(key
, &disk_key
);
1884 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1889 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1894 /* struct btrfs_header */
1895 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1896 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1898 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1899 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1900 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1901 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1903 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1905 return (btrfs_header_flags(eb
) & flag
) == flag
;
1908 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1910 u64 flags
= btrfs_header_flags(eb
);
1911 btrfs_set_header_flags(eb
, flags
| flag
);
1912 return (flags
& flag
) == flag
;
1915 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1917 u64 flags
= btrfs_header_flags(eb
);
1918 btrfs_set_header_flags(eb
, flags
& ~flag
);
1919 return (flags
& flag
) == flag
;
1922 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1924 u64 flags
= btrfs_header_flags(eb
);
1925 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1928 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1931 u64 flags
= btrfs_header_flags(eb
);
1932 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1933 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1934 btrfs_set_header_flags(eb
, flags
);
1937 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1939 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1943 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1945 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1949 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1951 return btrfs_header_level(eb
) == 0;
1954 /* struct btrfs_root_item */
1955 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1957 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1958 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1959 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1961 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1963 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1964 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1965 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1966 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1967 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1968 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1969 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1970 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1973 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
1975 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
1978 /* struct btrfs_super_block */
1980 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1981 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1982 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1984 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1985 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1986 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1987 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1988 struct btrfs_super_block
, chunk_root_generation
, 64);
1989 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1991 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1993 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1994 chunk_root_level
, 8);
1995 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1997 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1998 log_root_transid
, 64);
1999 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2001 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2003 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2005 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2007 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2009 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2011 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2013 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2014 root_dir_objectid
, 64);
2015 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2017 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2019 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2020 compat_ro_flags
, 64);
2021 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2022 incompat_flags
, 64);
2023 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2025 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2026 cache_generation
, 64);
2028 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2030 int t
= btrfs_super_csum_type(s
);
2031 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2032 return btrfs_csum_sizes
[t
];
2035 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2037 return offsetof(struct btrfs_leaf
, items
);
2040 /* struct btrfs_file_extent_item */
2041 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2043 static inline unsigned long
2044 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2046 unsigned long offset
= (unsigned long)e
;
2047 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2051 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2053 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2056 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2058 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2060 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2061 disk_num_bytes
, 64);
2062 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2064 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2066 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2068 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2070 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2072 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2073 other_encoding
, 16);
2075 /* this returns the number of file bytes represented by the inline item.
2076 * If an item is compressed, this is the uncompressed size
2078 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2079 struct btrfs_file_extent_item
*e
)
2081 return btrfs_file_extent_ram_bytes(eb
, e
);
2085 * this returns the number of bytes used by the item on disk, minus the
2086 * size of any extent headers. If a file is compressed on disk, this is
2087 * the compressed size
2089 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2090 struct btrfs_item
*e
)
2092 unsigned long offset
;
2093 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2094 return btrfs_item_size(eb
, e
) - offset
;
2097 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
2099 return sb
->s_fs_info
;
2102 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2105 return root
->leafsize
;
2106 return root
->nodesize
;
2109 /* helper function to cast into the data area of the leaf. */
2110 #define btrfs_item_ptr(leaf, slot, type) \
2111 ((type *)(btrfs_leaf_data(leaf) + \
2112 btrfs_item_offset_nr(leaf, slot)))
2114 #define btrfs_item_ptr_offset(leaf, slot) \
2115 ((unsigned long)(btrfs_leaf_data(leaf) + \
2116 btrfs_item_offset_nr(leaf, slot)))
2118 static inline struct dentry
*fdentry(struct file
*file
)
2120 return file
->f_path
.dentry
;
2123 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2125 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2126 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2130 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2133 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2137 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2138 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2139 struct btrfs_root
*root
, unsigned long count
);
2140 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2141 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2142 struct btrfs_root
*root
, u64 bytenr
,
2143 u64 num_bytes
, u64
*refs
, u64
*flags
);
2144 int btrfs_pin_extent(struct btrfs_root
*root
,
2145 u64 bytenr
, u64 num
, int reserved
);
2146 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2147 struct btrfs_root
*root
,
2148 u64 objectid
, u64 offset
, u64 bytenr
);
2149 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2150 struct btrfs_fs_info
*info
,
2152 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2153 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2154 u64 search_start
, u64 search_hint
, int owner
);
2155 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2156 struct btrfs_root
*root
, u32 blocksize
,
2157 u64 parent
, u64 root_objectid
,
2158 struct btrfs_disk_key
*key
, int level
,
2159 u64 hint
, u64 empty_size
);
2160 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2161 struct btrfs_root
*root
,
2162 struct extent_buffer
*buf
,
2163 u64 parent
, int last_ref
);
2164 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2165 struct btrfs_root
*root
,
2166 u64 bytenr
, u32 blocksize
,
2168 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2169 struct btrfs_root
*root
,
2170 u64 root_objectid
, u64 owner
,
2171 u64 offset
, struct btrfs_key
*ins
);
2172 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2173 struct btrfs_root
*root
,
2174 u64 root_objectid
, u64 owner
, u64 offset
,
2175 struct btrfs_key
*ins
);
2176 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2177 struct btrfs_root
*root
,
2178 u64 num_bytes
, u64 min_alloc_size
,
2179 u64 empty_size
, u64 hint_byte
,
2180 u64 search_end
, struct btrfs_key
*ins
,
2182 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2183 struct extent_buffer
*buf
, int full_backref
);
2184 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2185 struct extent_buffer
*buf
, int full_backref
);
2186 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2187 struct btrfs_root
*root
,
2188 u64 bytenr
, u64 num_bytes
, u64 flags
,
2190 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2191 struct btrfs_root
*root
,
2192 u64 bytenr
, u64 num_bytes
, u64 parent
,
2193 u64 root_objectid
, u64 owner
, u64 offset
);
2195 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2196 int btrfs_update_reserved_bytes(struct btrfs_block_group_cache
*cache
,
2197 u64 num_bytes
, int reserve
, int sinfo
);
2198 int btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2199 struct btrfs_root
*root
);
2200 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2201 struct btrfs_root
*root
);
2202 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2203 struct btrfs_root
*root
,
2204 u64 bytenr
, u64 num_bytes
, u64 parent
,
2205 u64 root_objectid
, u64 owner
, u64 offset
);
2207 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2208 struct btrfs_root
*root
);
2209 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2210 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2211 int btrfs_read_block_groups(struct btrfs_root
*root
);
2212 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2213 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2214 struct btrfs_root
*root
, u64 bytes_used
,
2215 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2217 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2218 struct btrfs_root
*root
, u64 group_start
);
2219 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2220 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2221 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2222 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2223 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
2224 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
2225 int btrfs_trans_reserve_metadata(struct btrfs_trans_handle
*trans
,
2226 struct btrfs_root
*root
,
2228 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2229 struct btrfs_root
*root
);
2230 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2231 struct inode
*inode
);
2232 void btrfs_orphan_release_metadata(struct inode
*inode
);
2233 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
2234 struct btrfs_pending_snapshot
*pending
);
2235 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2236 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2237 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
2238 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
2239 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2240 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2241 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2242 struct btrfs_block_rsv
*rsv
);
2243 void btrfs_add_durable_block_rsv(struct btrfs_fs_info
*fs_info
,
2244 struct btrfs_block_rsv
*rsv
);
2245 int btrfs_block_rsv_add(struct btrfs_trans_handle
*trans
,
2246 struct btrfs_root
*root
,
2247 struct btrfs_block_rsv
*block_rsv
,
2249 int btrfs_block_rsv_check(struct btrfs_trans_handle
*trans
,
2250 struct btrfs_root
*root
,
2251 struct btrfs_block_rsv
*block_rsv
,
2252 u64 min_reserved
, int min_factor
);
2253 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2254 struct btrfs_block_rsv
*dst_rsv
,
2256 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2257 struct btrfs_block_rsv
*block_rsv
,
2259 int btrfs_truncate_reserve_metadata(struct btrfs_trans_handle
*trans
,
2260 struct btrfs_root
*root
,
2261 struct btrfs_block_rsv
*rsv
);
2262 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2263 struct btrfs_block_group_cache
*cache
);
2264 int btrfs_set_block_group_rw(struct btrfs_root
*root
,
2265 struct btrfs_block_group_cache
*cache
);
2266 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2267 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2268 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2269 u64 start
, u64 end
);
2270 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2271 u64 num_bytes
, u64
*actual_bytes
);
2272 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2273 struct btrfs_root
*root
, u64 type
);
2274 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
2276 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2278 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2279 int level
, int *slot
);
2280 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2281 int btrfs_previous_item(struct btrfs_root
*root
,
2282 struct btrfs_path
*path
, u64 min_objectid
,
2284 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2285 struct btrfs_root
*root
, struct btrfs_path
*path
,
2286 struct btrfs_key
*new_key
);
2287 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2288 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2289 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2290 struct btrfs_key
*key
, int lowest_level
,
2291 int cache_only
, u64 min_trans
);
2292 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2293 struct btrfs_key
*max_key
,
2294 struct btrfs_path
*path
, int cache_only
,
2296 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2297 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2298 struct extent_buffer
*parent
, int parent_slot
,
2299 struct extent_buffer
**cow_ret
);
2300 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2301 struct btrfs_root
*root
,
2302 struct extent_buffer
*buf
,
2303 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2304 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2305 struct extent_buffer
*buf
);
2306 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2307 *root
, struct btrfs_path
*path
, u32 data_size
);
2308 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2309 struct btrfs_root
*root
,
2310 struct btrfs_path
*path
,
2311 u32 new_size
, int from_end
);
2312 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2313 struct btrfs_root
*root
,
2314 struct btrfs_path
*path
,
2315 struct btrfs_key
*new_key
,
2316 unsigned long split_offset
);
2317 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2318 struct btrfs_root
*root
,
2319 struct btrfs_path
*path
,
2320 struct btrfs_key
*new_key
);
2321 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2322 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2324 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2325 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2326 int start_slot
, int cache_only
, u64
*last_ret
,
2327 struct btrfs_key
*progress
);
2328 void btrfs_release_path(struct btrfs_path
*p
);
2329 struct btrfs_path
*btrfs_alloc_path(void);
2330 void btrfs_free_path(struct btrfs_path
*p
);
2331 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2332 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2333 struct extent_buffer
*held
);
2334 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2336 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2337 struct btrfs_path
*path
, int slot
, int nr
);
2338 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2339 struct btrfs_root
*root
,
2340 struct btrfs_path
*path
)
2342 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2345 int setup_items_for_insert(struct btrfs_trans_handle
*trans
,
2346 struct btrfs_root
*root
, struct btrfs_path
*path
,
2347 struct btrfs_key
*cpu_key
, u32
*data_size
,
2348 u32 total_data
, u32 total_size
, int nr
);
2349 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2350 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2351 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2352 struct btrfs_root
*root
,
2353 struct btrfs_path
*path
,
2354 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2356 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2357 struct btrfs_root
*root
,
2358 struct btrfs_path
*path
,
2359 struct btrfs_key
*key
,
2362 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2365 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2366 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2367 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2368 int btrfs_drop_snapshot(struct btrfs_root
*root
,
2369 struct btrfs_block_rsv
*block_rsv
, int update_ref
);
2370 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2371 struct btrfs_root
*root
,
2372 struct extent_buffer
*node
,
2373 struct extent_buffer
*parent
);
2374 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2377 * Get synced with close_ctree()
2380 return fs_info
->closing
;
2384 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2385 struct btrfs_path
*path
,
2386 u64 root_id
, u64 ref_id
);
2387 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2388 struct btrfs_root
*tree_root
,
2389 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2390 const char *name
, int name_len
);
2391 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2392 struct btrfs_root
*tree_root
,
2393 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2394 const char *name
, int name_len
);
2395 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2396 struct btrfs_key
*key
);
2397 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2398 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2400 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2401 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2403 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2404 btrfs_root_item
*item
, struct btrfs_key
*key
);
2405 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2406 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2407 int btrfs_set_root_node(struct btrfs_root_item
*item
,
2408 struct extent_buffer
*node
);
2409 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2412 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2413 struct btrfs_root
*root
, const char *name
,
2414 int name_len
, struct inode
*dir
,
2415 struct btrfs_key
*location
, u8 type
, u64 index
);
2416 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2417 struct btrfs_root
*root
,
2418 struct btrfs_path
*path
, u64 dir
,
2419 const char *name
, int name_len
,
2421 struct btrfs_dir_item
*
2422 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2423 struct btrfs_root
*root
,
2424 struct btrfs_path
*path
, u64 dir
,
2425 u64 objectid
, const char *name
, int name_len
,
2427 struct btrfs_dir_item
*
2428 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2429 struct btrfs_path
*path
, u64 dirid
,
2430 const char *name
, int name_len
);
2431 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2432 struct btrfs_path
*path
,
2433 const char *name
, int name_len
);
2434 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2435 struct btrfs_root
*root
,
2436 struct btrfs_path
*path
,
2437 struct btrfs_dir_item
*di
);
2438 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2439 struct btrfs_root
*root
,
2440 struct btrfs_path
*path
, u64 objectid
,
2441 const char *name
, u16 name_len
,
2442 const void *data
, u16 data_len
);
2443 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2444 struct btrfs_root
*root
,
2445 struct btrfs_path
*path
, u64 dir
,
2446 const char *name
, u16 name_len
,
2448 int verify_dir_item(struct btrfs_root
*root
,
2449 struct extent_buffer
*leaf
,
2450 struct btrfs_dir_item
*dir_item
);
2453 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2454 struct btrfs_root
*root
, u64 offset
);
2455 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2456 struct btrfs_root
*root
, u64 offset
);
2457 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2460 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2461 struct btrfs_root
*root
,
2462 const char *name
, int name_len
,
2463 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2464 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2465 struct btrfs_root
*root
,
2466 const char *name
, int name_len
,
2467 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2468 struct btrfs_inode_ref
*
2469 btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2470 struct btrfs_root
*root
,
2471 struct btrfs_path
*path
,
2472 const char *name
, int name_len
,
2473 u64 inode_objectid
, u64 ref_objectid
, int mod
);
2474 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2475 struct btrfs_root
*root
,
2476 struct btrfs_path
*path
, u64 objectid
);
2477 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2478 *root
, struct btrfs_path
*path
,
2479 struct btrfs_key
*location
, int mod
);
2482 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2483 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2484 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2485 struct bio
*bio
, u32
*dst
);
2486 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
2487 struct bio
*bio
, u64 logical_offset
, u32
*dst
);
2488 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2489 struct btrfs_root
*root
,
2490 u64 objectid
, u64 pos
,
2491 u64 disk_offset
, u64 disk_num_bytes
,
2492 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2493 u8 compression
, u8 encryption
, u16 other_encoding
);
2494 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2495 struct btrfs_root
*root
,
2496 struct btrfs_path
*path
, u64 objectid
,
2497 u64 bytenr
, int mod
);
2498 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2499 struct btrfs_root
*root
,
2500 struct btrfs_ordered_sum
*sums
);
2501 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2502 struct bio
*bio
, u64 file_start
, int contig
);
2503 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2504 struct btrfs_root
*root
,
2505 struct btrfs_path
*path
,
2506 u64 bytenr
, int cow
);
2507 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2508 struct btrfs_root
*root
, struct btrfs_path
*path
,
2510 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
2511 struct list_head
*list
, int search_commit
);
2514 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2515 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2516 #define ClearPageChecked ClearPageFsMisc
2517 #define SetPageChecked SetPageFsMisc
2518 #define PageChecked PageFsMisc
2521 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2522 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2523 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2524 struct btrfs_root
*root
,
2525 struct inode
*dir
, struct inode
*inode
,
2526 const char *name
, int name_len
);
2527 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2528 struct inode
*parent_inode
, struct inode
*inode
,
2529 const char *name
, int name_len
, int add_backref
, u64 index
);
2530 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2531 struct btrfs_root
*root
,
2532 struct inode
*dir
, u64 objectid
,
2533 const char *name
, int name_len
);
2534 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2535 struct btrfs_root
*root
,
2536 struct inode
*inode
, u64 new_size
,
2539 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2540 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
2541 struct extent_state
**cached_state
);
2542 int btrfs_writepages(struct address_space
*mapping
,
2543 struct writeback_control
*wbc
);
2544 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2545 struct btrfs_root
*new_root
, u64 new_dirid
);
2546 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2547 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2549 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2550 struct file_ra_state
*ra
, struct file
*file
,
2551 pgoff_t offset
, pgoff_t last_index
);
2552 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2553 int btrfs_readpage(struct file
*file
, struct page
*page
);
2554 void btrfs_evict_inode(struct inode
*inode
);
2555 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
2556 void btrfs_dirty_inode(struct inode
*inode
, int flags
);
2557 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2558 void btrfs_destroy_inode(struct inode
*inode
);
2559 int btrfs_drop_inode(struct inode
*inode
);
2560 int btrfs_init_cachep(void);
2561 void btrfs_destroy_cachep(void);
2562 long btrfs_ioctl_trans_end(struct file
*file
);
2563 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2564 struct btrfs_root
*root
, int *was_new
);
2565 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2566 size_t pg_offset
, u64 start
, u64 end
,
2568 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2569 struct btrfs_root
*root
,
2570 struct inode
*inode
);
2571 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2572 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2573 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
2574 void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle
*trans
,
2575 struct btrfs_pending_snapshot
*pending
,
2576 u64
*bytes_to_reserve
);
2577 void btrfs_orphan_post_snapshot(struct btrfs_trans_handle
*trans
,
2578 struct btrfs_pending_snapshot
*pending
);
2579 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
2580 struct btrfs_root
*root
);
2581 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
2582 int btrfs_invalidate_inodes(struct btrfs_root
*root
);
2583 void btrfs_add_delayed_iput(struct inode
*inode
);
2584 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
2585 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
2586 u64 start
, u64 num_bytes
, u64 min_size
,
2587 loff_t actual_len
, u64
*alloc_hint
);
2588 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
2589 struct btrfs_trans_handle
*trans
, int mode
,
2590 u64 start
, u64 num_bytes
, u64 min_size
,
2591 loff_t actual_len
, u64
*alloc_hint
);
2592 extern const struct dentry_operations btrfs_dentry_operations
;
2595 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2596 void btrfs_update_iflags(struct inode
*inode
);
2597 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2598 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
2599 struct btrfs_ioctl_defrag_range_args
*range
,
2600 u64 newer_than
, unsigned long max_pages
);
2602 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
2603 struct inode
*inode
);
2604 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
2605 int btrfs_sync_file(struct file
*file
, int datasync
);
2606 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2608 extern const struct file_operations btrfs_file_operations
;
2609 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
2610 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
2611 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2612 struct inode
*inode
, u64 start
, u64 end
);
2613 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2614 void btrfs_drop_pages(struct page
**pages
, size_t num_pages
);
2615 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
2616 struct page
**pages
, size_t num_pages
,
2617 loff_t pos
, size_t write_bytes
,
2618 struct extent_state
**cached
);
2621 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2622 struct btrfs_root
*root
, int cache_only
);
2625 int btrfs_init_sysfs(void);
2626 void btrfs_exit_sysfs(void);
2629 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2632 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2633 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2634 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
2635 unsigned int line
, int errno
);
2637 #define btrfs_std_error(fs_info, errno) \
2640 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2644 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2645 int btrfs_check_acl(struct inode
*inode
, int mask
, unsigned int flags
);
2647 #define btrfs_check_acl NULL
2649 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2650 struct inode
*inode
, struct inode
*dir
);
2651 int btrfs_acl_chmod(struct inode
*inode
);
2654 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
2655 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
2656 struct btrfs_root
*root
);
2657 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
2658 struct btrfs_root
*root
);
2659 int btrfs_recover_relocation(struct btrfs_root
*root
);
2660 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
2661 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
2662 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2663 struct extent_buffer
*cow
);
2664 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
2665 struct btrfs_pending_snapshot
*pending
,
2666 u64
*bytes_to_reserve
);
2667 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
2668 struct btrfs_pending_snapshot
*pending
);
2671 int btrfs_scrub_dev(struct btrfs_root
*root
, u64 devid
, u64 start
, u64 end
,
2672 struct btrfs_scrub_progress
*progress
, int readonly
);
2673 int btrfs_scrub_pause(struct btrfs_root
*root
);
2674 int btrfs_scrub_pause_super(struct btrfs_root
*root
);
2675 int btrfs_scrub_continue(struct btrfs_root
*root
);
2676 int btrfs_scrub_continue_super(struct btrfs_root
*root
);
2677 int btrfs_scrub_cancel(struct btrfs_root
*root
);
2678 int btrfs_scrub_cancel_dev(struct btrfs_root
*root
, struct btrfs_device
*dev
);
2679 int btrfs_scrub_cancel_devid(struct btrfs_root
*root
, u64 devid
);
2680 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
2681 struct btrfs_scrub_progress
*progress
);