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__
22 #include <linux/version.h>
24 #include <linux/highmem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <linux/slab.h>
30 #include <asm/kmap_types.h>
31 #include "extent_io.h"
32 #include "extent_map.h"
33 #include "async-thread.h"
35 struct btrfs_trans_handle
;
36 struct btrfs_transaction
;
37 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
38 extern struct kmem_cache
*btrfs_transaction_cachep
;
39 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
40 extern struct kmem_cache
*btrfs_path_cachep
;
41 struct btrfs_ordered_sum
;
43 #define BTRFS_MAGIC "_BHRfS_M"
45 #define BTRFS_MAX_LEVEL 8
47 #define BTRFS_COMPAT_EXTENT_TREE_V0
50 * files bigger than this get some pre-flushing when they are added
51 * to the ordered operations list. That way we limit the total
52 * work done by the commit
54 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
56 /* holds pointers to all of the tree roots */
57 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
59 /* stores information about which extents are in use, and reference counts */
60 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
63 * chunk tree stores translations from logical -> physical block numbering
64 * the super block points to the chunk tree
66 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
69 * stores information about which areas of a given device are in use.
70 * one per device. The tree of tree roots points to the device tree
72 #define BTRFS_DEV_TREE_OBJECTID 4ULL
74 /* one per subvolume, storing files and directories */
75 #define BTRFS_FS_TREE_OBJECTID 5ULL
77 /* directory objectid inside the root tree */
78 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
80 /* holds checksums of all the data extents */
81 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
83 /* orhpan objectid for tracking unlinked/truncated files */
84 #define BTRFS_ORPHAN_OBJECTID -5ULL
86 /* does write ahead logging to speed up fsyncs */
87 #define BTRFS_TREE_LOG_OBJECTID -6ULL
88 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
90 /* for space balancing */
91 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
92 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
95 * extent checksums all have this objectid
96 * this allows them to share the logging tree
99 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
101 /* dummy objectid represents multiple objectids */
102 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
105 * All files have objectids in this range.
107 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
108 #define BTRFS_LAST_FREE_OBJECTID -256ULL
109 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
113 * the device items go into the chunk tree. The key is in the form
114 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
116 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
118 #define BTRFS_BTREE_INODE_OBJECTID 1
120 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
123 * we can actually store much bigger names, but lets not confuse the rest
126 #define BTRFS_NAME_LEN 255
128 /* 32 bytes in various csum fields */
129 #define BTRFS_CSUM_SIZE 32
132 #define BTRFS_CSUM_TYPE_CRC32 0
134 static int btrfs_csum_sizes
[] = { 4, 0 };
136 /* four bytes for CRC32 */
137 #define BTRFS_EMPTY_DIR_SIZE 0
139 #define BTRFS_FT_UNKNOWN 0
140 #define BTRFS_FT_REG_FILE 1
141 #define BTRFS_FT_DIR 2
142 #define BTRFS_FT_CHRDEV 3
143 #define BTRFS_FT_BLKDEV 4
144 #define BTRFS_FT_FIFO 5
145 #define BTRFS_FT_SOCK 6
146 #define BTRFS_FT_SYMLINK 7
147 #define BTRFS_FT_XATTR 8
148 #define BTRFS_FT_MAX 9
151 * The key defines the order in the tree, and so it also defines (optimal)
154 * objectid corresponds to the inode number.
156 * type tells us things about the object, and is a kind of stream selector.
157 * so for a given inode, keys with type of 1 might refer to the inode data,
158 * type of 2 may point to file data in the btree and type == 3 may point to
161 * offset is the starting byte offset for this key in the stream.
163 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
164 * in cpu native order. Otherwise they are identical and their sizes
165 * should be the same (ie both packed)
167 struct btrfs_disk_key
{
171 } __attribute__ ((__packed__
));
177 } __attribute__ ((__packed__
));
179 struct btrfs_mapping_tree
{
180 struct extent_map_tree map_tree
;
183 #define BTRFS_UUID_SIZE 16
184 struct btrfs_dev_item
{
185 /* the internal btrfs device id */
188 /* size of the device */
194 /* optimal io alignment for this device */
197 /* optimal io width for this device */
200 /* minimal io size for this device */
203 /* type and info about this device */
206 /* expected generation for this device */
210 * starting byte of this partition on the device,
211 * to allow for stripe alignment in the future
215 /* grouping information for allocation decisions */
218 /* seek speed 0-100 where 100 is fastest */
221 /* bandwidth 0-100 where 100 is fastest */
224 /* btrfs generated uuid for this device */
225 u8 uuid
[BTRFS_UUID_SIZE
];
227 /* uuid of FS who owns this device */
228 u8 fsid
[BTRFS_UUID_SIZE
];
229 } __attribute__ ((__packed__
));
231 struct btrfs_stripe
{
234 u8 dev_uuid
[BTRFS_UUID_SIZE
];
235 } __attribute__ ((__packed__
));
238 /* size of this chunk in bytes */
241 /* objectid of the root referencing this chunk */
247 /* optimal io alignment for this chunk */
250 /* optimal io width for this chunk */
253 /* minimal io size for this chunk */
256 /* 2^16 stripes is quite a lot, a second limit is the size of a single
261 /* sub stripes only matter for raid10 */
263 struct btrfs_stripe stripe
;
264 /* additional stripes go here */
265 } __attribute__ ((__packed__
));
267 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
269 BUG_ON(num_stripes
== 0);
270 return sizeof(struct btrfs_chunk
) +
271 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
274 #define BTRFS_FSID_SIZE 16
275 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
276 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
277 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
278 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
280 #define BTRFS_BACKREF_REV_MAX 256
281 #define BTRFS_BACKREF_REV_SHIFT 56
282 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
283 BTRFS_BACKREF_REV_SHIFT)
285 #define BTRFS_OLD_BACKREF_REV 0
286 #define BTRFS_MIXED_BACKREF_REV 1
289 * every tree block (leaf or node) starts with this header.
291 struct btrfs_header
{
292 /* these first four must match the super block */
293 u8 csum
[BTRFS_CSUM_SIZE
];
294 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
295 __le64 bytenr
; /* which block this node is supposed to live in */
298 /* allowed to be different from the super from here on down */
299 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
304 } __attribute__ ((__packed__
));
306 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
307 sizeof(struct btrfs_header)) / \
308 sizeof(struct btrfs_key_ptr))
309 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
310 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
311 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
312 sizeof(struct btrfs_item) - \
313 sizeof(struct btrfs_file_extent_item))
314 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
315 sizeof(struct btrfs_item) -\
316 sizeof(struct btrfs_dir_item))
320 * this is a very generous portion of the super block, giving us
321 * room to translate 14 chunks with 3 stripes each.
323 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
324 #define BTRFS_LABEL_SIZE 256
327 * the super block basically lists the main trees of the FS
328 * it currently lacks any block count etc etc
330 struct btrfs_super_block
{
331 u8 csum
[BTRFS_CSUM_SIZE
];
332 /* the first 4 fields must match struct btrfs_header */
333 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
334 __le64 bytenr
; /* this block number */
337 /* allowed to be different from the btrfs_header from here own down */
344 /* this will help find the new super based on the log root */
345 __le64 log_root_transid
;
348 __le64 root_dir_objectid
;
354 __le32 sys_chunk_array_size
;
355 __le64 chunk_root_generation
;
357 __le64 compat_ro_flags
;
358 __le64 incompat_flags
;
363 struct btrfs_dev_item dev_item
;
365 char label
[BTRFS_LABEL_SIZE
];
367 /* future expansion */
369 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
370 } __attribute__ ((__packed__
));
373 * Compat flags that we support. If any incompat flags are set other than the
374 * ones specified below then we will fail to mount
376 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
377 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (2ULL << 0)
379 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
380 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
381 #define BTRFS_FEATURE_INCOMPAT_SUPP \
382 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
383 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL)
386 * A leaf is full of items. offset and size tell us where to find
387 * the item in the leaf (relative to the start of the data area)
390 struct btrfs_disk_key key
;
393 } __attribute__ ((__packed__
));
396 * leaves have an item area and a data area:
397 * [item0, item1....itemN] [free space] [dataN...data1, data0]
399 * The data is separate from the items to get the keys closer together
403 struct btrfs_header header
;
404 struct btrfs_item items
[];
405 } __attribute__ ((__packed__
));
408 * all non-leaf blocks are nodes, they hold only keys and pointers to
411 struct btrfs_key_ptr
{
412 struct btrfs_disk_key key
;
415 } __attribute__ ((__packed__
));
418 struct btrfs_header header
;
419 struct btrfs_key_ptr ptrs
[];
420 } __attribute__ ((__packed__
));
423 * btrfs_paths remember the path taken from the root down to the leaf.
424 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
425 * to any other levels that are present.
427 * The slots array records the index of the item or block pointer
428 * used while walking the tree.
431 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
432 int slots
[BTRFS_MAX_LEVEL
];
433 /* if there is real range locking, this locks field will change */
434 int locks
[BTRFS_MAX_LEVEL
];
436 /* keep some upper locks as we walk down */
440 * set by btrfs_split_item, tells search_slot to keep all locks
441 * and to force calls to keep space in the nodes
443 unsigned int search_for_split
:1;
444 unsigned int keep_locks
:1;
445 unsigned int skip_locking
:1;
446 unsigned int leave_spinning
:1;
447 unsigned int search_commit_root
:1;
451 * items in the extent btree are used to record the objectid of the
452 * owner of the block and the number of references
455 struct btrfs_extent_item
{
459 } __attribute__ ((__packed__
));
461 struct btrfs_extent_item_v0
{
463 } __attribute__ ((__packed__
));
465 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
466 sizeof(struct btrfs_item))
468 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
469 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
471 /* following flags only apply to tree blocks */
473 /* use full backrefs for extent pointers in the block */
474 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
476 struct btrfs_tree_block_info
{
477 struct btrfs_disk_key key
;
479 } __attribute__ ((__packed__
));
481 struct btrfs_extent_data_ref
{
486 } __attribute__ ((__packed__
));
488 struct btrfs_shared_data_ref
{
490 } __attribute__ ((__packed__
));
492 struct btrfs_extent_inline_ref
{
495 } __attribute__ ((__packed__
));
497 /* old style backrefs item */
498 struct btrfs_extent_ref_v0
{
503 } __attribute__ ((__packed__
));
506 /* dev extents record free space on individual devices. The owner
507 * field points back to the chunk allocation mapping tree that allocated
508 * the extent. The chunk tree uuid field is a way to double check the owner
510 struct btrfs_dev_extent
{
512 __le64 chunk_objectid
;
515 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
516 } __attribute__ ((__packed__
));
518 struct btrfs_inode_ref
{
522 } __attribute__ ((__packed__
));
524 struct btrfs_timespec
{
527 } __attribute__ ((__packed__
));
529 enum btrfs_compression_type
{
530 BTRFS_COMPRESS_NONE
= 0,
531 BTRFS_COMPRESS_ZLIB
= 1,
532 BTRFS_COMPRESS_LAST
= 2,
535 struct btrfs_inode_item
{
536 /* nfs style generation number */
538 /* transid that last touched this inode */
550 /* modification sequence number for NFS */
554 * a little future expansion, for more than this we can
555 * just grow the inode item and version it
558 struct btrfs_timespec atime
;
559 struct btrfs_timespec ctime
;
560 struct btrfs_timespec mtime
;
561 struct btrfs_timespec otime
;
562 } __attribute__ ((__packed__
));
564 struct btrfs_dir_log_item
{
566 } __attribute__ ((__packed__
));
568 struct btrfs_dir_item
{
569 struct btrfs_disk_key location
;
574 } __attribute__ ((__packed__
));
576 struct btrfs_root_item
{
577 struct btrfs_inode_item inode
;
583 __le64 last_snapshot
;
586 struct btrfs_disk_key drop_progress
;
589 } __attribute__ ((__packed__
));
592 * this is used for both forward and backward root refs
594 struct btrfs_root_ref
{
598 } __attribute__ ((__packed__
));
600 #define BTRFS_FILE_EXTENT_INLINE 0
601 #define BTRFS_FILE_EXTENT_REG 1
602 #define BTRFS_FILE_EXTENT_PREALLOC 2
604 struct btrfs_file_extent_item
{
606 * transaction id that created this extent
610 * max number of bytes to hold this extent in ram
611 * when we split a compressed extent we can't know how big
612 * each of the resulting pieces will be. So, this is
613 * an upper limit on the size of the extent in ram instead of
619 * 32 bits for the various ways we might encode the data,
620 * including compression and encryption. If any of these
621 * are set to something a given disk format doesn't understand
622 * it is treated like an incompat flag for reading and writing,
627 __le16 other_encoding
; /* spare for later use */
629 /* are we inline data or a real extent? */
633 * disk space consumed by the extent, checksum blocks are included
637 __le64 disk_num_bytes
;
639 * the logical offset in file blocks (no csums)
640 * this extent record is for. This allows a file extent to point
641 * into the middle of an existing extent on disk, sharing it
642 * between two snapshots (useful if some bytes in the middle of the
643 * extent have changed
647 * the logical number of file blocks (no csums included). This
648 * always reflects the size uncompressed and without encoding.
652 } __attribute__ ((__packed__
));
654 struct btrfs_csum_item
{
656 } __attribute__ ((__packed__
));
658 /* different types of block groups (and chunks) */
659 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
660 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
661 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
662 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
663 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
664 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
665 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
666 #define BTRFS_NR_RAID_TYPES 5
668 struct btrfs_block_group_item
{
670 __le64 chunk_objectid
;
672 } __attribute__ ((__packed__
));
674 struct btrfs_space_info
{
677 u64 total_bytes
; /* total bytes in the space */
678 u64 bytes_used
; /* total bytes used,
679 this does't take mirrors into account */
680 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
681 transaction finishes */
682 u64 bytes_reserved
; /* total bytes the allocator has reserved for
683 current allocations */
684 u64 bytes_readonly
; /* total bytes that are read only */
685 u64 bytes_super
; /* total bytes reserved for the super blocks */
686 u64 bytes_root
; /* the number of bytes needed to commit a
688 u64 bytes_may_use
; /* number of bytes that may be used for
689 delalloc/allocations */
690 u64 bytes_delalloc
; /* number of bytes currently reserved for
691 delayed allocation */
692 u64 disk_used
; /* total bytes used on disk */
694 int full
; /* indicates that we cannot allocate any more
695 chunks for this space */
696 int force_alloc
; /* set if we need to force a chunk alloc for
698 int force_delalloc
; /* make people start doing filemap_flush until
699 we're under a threshold */
701 struct list_head list
;
703 /* for block groups in our same type */
704 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
706 struct rw_semaphore groups_sem
;
707 atomic_t caching_threads
;
710 struct btrfs_block_rsv
{
714 struct btrfs_space_info
*space_info
;
715 struct list_head list
;
718 unsigned int priority
:8;
719 unsigned int durable
:1;
720 unsigned int refill_used
:1;
725 * free clusters are used to claim free space in relatively large chunks,
726 * allowing us to do less seeky writes. They are used for all metadata
727 * allocations and data allocations in ssd mode.
729 struct btrfs_free_cluster
{
731 spinlock_t refill_lock
;
734 /* largest extent in this cluster */
737 /* first extent starting offset */
740 /* if this cluster simply points at a bitmap in the block group */
741 bool points_to_bitmap
;
743 struct btrfs_block_group_cache
*block_group
;
745 * when a cluster is allocated from a block group, we put the
746 * cluster onto a list in the block group so that it can
747 * be freed before the block group is freed.
749 struct list_head block_group_list
;
752 enum btrfs_caching_type
{
754 BTRFS_CACHE_STARTED
= 1,
755 BTRFS_CACHE_FINISHED
= 2,
758 struct btrfs_caching_control
{
759 struct list_head list
;
761 wait_queue_head_t wait
;
762 struct btrfs_block_group_cache
*block_group
;
767 struct btrfs_block_group_cache
{
768 struct btrfs_key key
;
769 struct btrfs_block_group_item item
;
770 struct btrfs_fs_info
*fs_info
;
784 /* cache tracking stuff */
786 struct btrfs_caching_control
*caching_ctl
;
787 u64 last_byte_to_unpin
;
789 struct btrfs_space_info
*space_info
;
791 /* free space cache stuff */
792 spinlock_t tree_lock
;
793 struct rb_root free_space_offset
;
796 /* block group cache stuff */
797 struct rb_node cache_node
;
799 /* for block groups in the same raid type */
800 struct list_head list
;
805 /* List of struct btrfs_free_clusters for this block group.
806 * Today it will only have one thing on it, but that may change
808 struct list_head cluster_list
;
811 struct reloc_control
;
813 struct btrfs_fs_devices
;
814 struct btrfs_fs_info
{
815 u8 fsid
[BTRFS_FSID_SIZE
];
816 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
817 struct btrfs_root
*extent_root
;
818 struct btrfs_root
*tree_root
;
819 struct btrfs_root
*chunk_root
;
820 struct btrfs_root
*dev_root
;
821 struct btrfs_root
*fs_root
;
822 struct btrfs_root
*csum_root
;
824 /* the log root tree is a directory of all the other log roots */
825 struct btrfs_root
*log_root_tree
;
827 spinlock_t fs_roots_radix_lock
;
828 struct radix_tree_root fs_roots_radix
;
830 /* block group cache stuff */
831 spinlock_t block_group_cache_lock
;
832 struct rb_root block_group_cache_tree
;
834 struct extent_io_tree freed_extents
[2];
835 struct extent_io_tree
*pinned_extents
;
837 /* logical->physical extent mapping */
838 struct btrfs_mapping_tree mapping_tree
;
840 /* block reservation for extent, checksum and root tree */
841 struct btrfs_block_rsv global_block_rsv
;
842 /* block reservation for delay allocation */
843 struct btrfs_block_rsv delalloc_block_rsv
;
844 /* block reservation for metadata operations */
845 struct btrfs_block_rsv trans_block_rsv
;
846 /* block reservation for chunk tree */
847 struct btrfs_block_rsv chunk_block_rsv
;
849 struct btrfs_block_rsv empty_block_rsv
;
851 /* list of block reservations that cross multiple transactions */
852 struct list_head durable_block_rsv_list
;
854 struct mutex durable_block_rsv_mutex
;
857 u64 last_trans_committed
;
860 * this is updated to the current trans every time a full commit
861 * is required instead of the faster short fsync log commits
863 u64 last_trans_log_full_commit
;
864 u64 open_ioctl_trans
;
865 unsigned long mount_opt
;
868 struct btrfs_transaction
*running_transaction
;
869 wait_queue_head_t transaction_throttle
;
870 wait_queue_head_t transaction_wait
;
871 wait_queue_head_t async_submit_wait
;
873 struct btrfs_super_block super_copy
;
874 struct btrfs_super_block super_for_commit
;
875 struct block_device
*__bdev
;
876 struct super_block
*sb
;
877 struct inode
*btree_inode
;
878 struct backing_dev_info bdi
;
879 struct mutex trans_mutex
;
880 struct mutex tree_log_mutex
;
881 struct mutex transaction_kthread_mutex
;
882 struct mutex cleaner_mutex
;
883 struct mutex chunk_mutex
;
884 struct mutex volume_mutex
;
886 * this protects the ordered operations list only while we are
887 * processing all of the entries on it. This way we make
888 * sure the commit code doesn't find the list temporarily empty
889 * because another function happens to be doing non-waiting preflush
890 * before jumping into the main commit.
892 struct mutex ordered_operations_mutex
;
893 struct rw_semaphore extent_commit_sem
;
895 struct rw_semaphore cleanup_work_sem
;
897 struct rw_semaphore subvol_sem
;
898 struct srcu_struct subvol_srcu
;
900 struct list_head trans_list
;
901 struct list_head hashers
;
902 struct list_head dead_roots
;
903 struct list_head caching_block_groups
;
905 spinlock_t delayed_iput_lock
;
906 struct list_head delayed_iputs
;
908 atomic_t nr_async_submits
;
909 atomic_t async_submit_draining
;
910 atomic_t nr_async_bios
;
911 atomic_t async_delalloc_pages
;
914 * this is used by the balancing code to wait for all the pending
917 spinlock_t ordered_extent_lock
;
920 * all of the data=ordered extents pending writeback
921 * these can span multiple transactions and basically include
922 * every dirty data page that isn't from nodatacow
924 struct list_head ordered_extents
;
927 * all of the inodes that have delalloc bytes. It is possible for
928 * this list to be empty even when there is still dirty data=ordered
929 * extents waiting to finish IO.
931 struct list_head delalloc_inodes
;
934 * special rename and truncate targets that must be on disk before
935 * we're allowed to commit. This is basically the ext3 style
938 struct list_head ordered_operations
;
941 * there is a pool of worker threads for checksumming during writes
942 * and a pool for checksumming after reads. This is because readers
943 * can run with FS locks held, and the writers may be waiting for
944 * those locks. We don't want ordering in the pending list to cause
945 * deadlocks, and so the two are serviced separately.
947 * A third pool does submit_bio to avoid deadlocking with the other
950 struct btrfs_workers generic_worker
;
951 struct btrfs_workers workers
;
952 struct btrfs_workers delalloc_workers
;
953 struct btrfs_workers endio_workers
;
954 struct btrfs_workers endio_meta_workers
;
955 struct btrfs_workers endio_meta_write_workers
;
956 struct btrfs_workers endio_write_workers
;
957 struct btrfs_workers submit_workers
;
959 * fixup workers take dirty pages that didn't properly go through
960 * the cow mechanism and make them safe to write. It happens
961 * for the sys_munmap function call path
963 struct btrfs_workers fixup_workers
;
964 struct task_struct
*transaction_kthread
;
965 struct task_struct
*cleaner_kthread
;
966 int thread_pool_size
;
968 struct kobject super_kobj
;
969 struct completion kobj_unregister
;
972 int log_root_recovering
;
976 /* protected by the delalloc lock, used to keep from writing
977 * metadata until there is a nice batch
979 u64 dirty_metadata_bytes
;
980 struct list_head dirty_cowonly_roots
;
982 struct btrfs_fs_devices
*fs_devices
;
985 * the space_info list is almost entirely read only. It only changes
986 * when we add a new raid type to the FS, and that happens
987 * very rarely. RCU is used to protect it.
989 struct list_head space_info
;
991 struct reloc_control
*reloc_ctl
;
993 spinlock_t delalloc_lock
;
994 spinlock_t new_trans_lock
;
997 /* data_alloc_cluster is only used in ssd mode */
998 struct btrfs_free_cluster data_alloc_cluster
;
1000 /* all metadata allocations go through this cluster */
1001 struct btrfs_free_cluster meta_alloc_cluster
;
1003 spinlock_t ref_cache_lock
;
1004 u64 total_ref_cache_size
;
1006 u64 avail_data_alloc_bits
;
1007 u64 avail_metadata_alloc_bits
;
1008 u64 avail_system_alloc_bits
;
1009 u64 data_alloc_profile
;
1010 u64 metadata_alloc_profile
;
1011 u64 system_alloc_profile
;
1013 unsigned data_chunk_allocations
;
1014 unsigned metadata_ratio
;
1020 * in ram representation of the tree. extent_root is used for all allocations
1021 * and for the extent tree extent_root root.
1024 struct extent_buffer
*node
;
1026 /* the node lock is held while changing the node pointer */
1027 spinlock_t node_lock
;
1029 struct extent_buffer
*commit_root
;
1030 struct btrfs_root
*log_root
;
1031 struct btrfs_root
*reloc_root
;
1033 struct btrfs_root_item root_item
;
1034 struct btrfs_key root_key
;
1035 struct btrfs_fs_info
*fs_info
;
1036 struct extent_io_tree dirty_log_pages
;
1038 struct kobject root_kobj
;
1039 struct completion kobj_unregister
;
1040 struct mutex objectid_mutex
;
1042 spinlock_t accounting_lock
;
1043 struct btrfs_block_rsv
*block_rsv
;
1045 struct mutex log_mutex
;
1046 wait_queue_head_t log_writer_wait
;
1047 wait_queue_head_t log_commit_wait
[2];
1048 atomic_t log_writers
;
1049 atomic_t log_commit
[2];
1050 unsigned long log_transid
;
1051 unsigned long last_log_commit
;
1052 unsigned long log_batch
;
1053 pid_t log_start_pid
;
1054 bool log_multiple_pids
;
1059 /* data allocations are done in sectorsize units */
1062 /* node allocations are done in nodesize units */
1065 /* leaf allocations are done in leafsize units */
1072 u64 highest_objectid
;
1078 u64 defrag_trans_start
;
1079 struct btrfs_key defrag_progress
;
1080 struct btrfs_key defrag_max
;
1085 /* the dirty list is only used by non-reference counted roots */
1086 struct list_head dirty_list
;
1088 struct list_head root_list
;
1090 spinlock_t list_lock
;
1091 struct list_head orphan_list
;
1093 spinlock_t inode_lock
;
1094 /* red-black tree that keeps track of in-memory inodes */
1095 struct rb_root inode_tree
;
1098 * right now this just gets used so that a root has its own devid
1099 * for stat. It may be used for more later
1101 struct super_block anon_super
;
1105 * inode items have the data typically returned from stat and store other
1106 * info about object characteristics. There is one for every file and dir in
1109 #define BTRFS_INODE_ITEM_KEY 1
1110 #define BTRFS_INODE_REF_KEY 12
1111 #define BTRFS_XATTR_ITEM_KEY 24
1112 #define BTRFS_ORPHAN_ITEM_KEY 48
1113 /* reserve 2-15 close to the inode for later flexibility */
1116 * dir items are the name -> inode pointers in a directory. There is one
1117 * for every name in a directory.
1119 #define BTRFS_DIR_LOG_ITEM_KEY 60
1120 #define BTRFS_DIR_LOG_INDEX_KEY 72
1121 #define BTRFS_DIR_ITEM_KEY 84
1122 #define BTRFS_DIR_INDEX_KEY 96
1124 * extent data is for file data
1126 #define BTRFS_EXTENT_DATA_KEY 108
1129 * extent csums are stored in a separate tree and hold csums for
1130 * an entire extent on disk.
1132 #define BTRFS_EXTENT_CSUM_KEY 128
1135 * root items point to tree roots. They are typically in the root
1136 * tree used by the super block to find all the other trees
1138 #define BTRFS_ROOT_ITEM_KEY 132
1141 * root backrefs tie subvols and snapshots to the directory entries that
1144 #define BTRFS_ROOT_BACKREF_KEY 144
1147 * root refs make a fast index for listing all of the snapshots and
1148 * subvolumes referenced by a given root. They point directly to the
1149 * directory item in the root that references the subvol
1151 #define BTRFS_ROOT_REF_KEY 156
1154 * extent items are in the extent map tree. These record which blocks
1155 * are used, and how many references there are to each block
1157 #define BTRFS_EXTENT_ITEM_KEY 168
1159 #define BTRFS_TREE_BLOCK_REF_KEY 176
1161 #define BTRFS_EXTENT_DATA_REF_KEY 178
1163 #define BTRFS_EXTENT_REF_V0_KEY 180
1165 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1167 #define BTRFS_SHARED_DATA_REF_KEY 184
1170 * block groups give us hints into the extent allocation trees. Which
1171 * blocks are free etc etc
1173 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1175 #define BTRFS_DEV_EXTENT_KEY 204
1176 #define BTRFS_DEV_ITEM_KEY 216
1177 #define BTRFS_CHUNK_ITEM_KEY 228
1180 * string items are for debugging. They just store a short string of
1183 #define BTRFS_STRING_ITEM_KEY 253
1185 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1186 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1187 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1188 #define BTRFS_MOUNT_SSD (1 << 3)
1189 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1190 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1191 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1192 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1193 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1194 #define BTRFS_MOUNT_NOSSD (1 << 9)
1195 #define BTRFS_MOUNT_DISCARD (1 << 10)
1196 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1198 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1199 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1200 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1205 #define BTRFS_INODE_NODATASUM (1 << 0)
1206 #define BTRFS_INODE_NODATACOW (1 << 1)
1207 #define BTRFS_INODE_READONLY (1 << 2)
1208 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1209 #define BTRFS_INODE_PREALLOC (1 << 4)
1210 #define BTRFS_INODE_SYNC (1 << 5)
1211 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1212 #define BTRFS_INODE_APPEND (1 << 7)
1213 #define BTRFS_INODE_NODUMP (1 << 8)
1214 #define BTRFS_INODE_NOATIME (1 << 9)
1215 #define BTRFS_INODE_DIRSYNC (1 << 10)
1217 /* some macros to generate set/get funcs for the struct fields. This
1218 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1221 #define le8_to_cpu(v) (v)
1222 #define cpu_to_le8(v) (v)
1225 #define read_eb_member(eb, ptr, type, member, result) ( \
1226 read_extent_buffer(eb, (char *)(result), \
1227 ((unsigned long)(ptr)) + \
1228 offsetof(type, member), \
1229 sizeof(((type *)0)->member)))
1231 #define write_eb_member(eb, ptr, type, member, result) ( \
1232 write_extent_buffer(eb, (char *)(result), \
1233 ((unsigned long)(ptr)) + \
1234 offsetof(type, member), \
1235 sizeof(((type *)0)->member)))
1237 #ifndef BTRFS_SETGET_FUNCS
1238 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1239 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1240 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1243 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1244 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1246 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1247 u##bits res = le##bits##_to_cpu(p->member); \
1248 kunmap_atomic(p, KM_USER0); \
1251 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1254 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1255 p->member = cpu_to_le##bits(val); \
1256 kunmap_atomic(p, KM_USER0); \
1259 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1260 static inline u##bits btrfs_##name(type *s) \
1262 return le##bits##_to_cpu(s->member); \
1264 static inline void btrfs_set_##name(type *s, u##bits val) \
1266 s->member = cpu_to_le##bits(val); \
1269 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1270 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1271 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1272 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1273 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1274 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1276 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1277 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1278 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1279 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1280 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1281 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1283 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1284 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1286 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1288 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1290 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1292 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1294 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1295 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1297 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1299 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1301 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1304 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1306 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1309 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1311 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1314 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1315 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1316 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1317 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1318 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1319 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1320 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1321 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1322 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1323 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1324 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1326 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1328 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1331 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1332 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1333 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1335 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1337 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1339 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1341 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1342 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1344 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1346 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1347 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1349 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1352 unsigned long offset
= (unsigned long)c
;
1353 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1354 offset
+= nr
* sizeof(struct btrfs_stripe
);
1355 return (struct btrfs_stripe
*)offset
;
1358 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1360 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1363 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1364 struct btrfs_chunk
*c
, int nr
)
1366 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1369 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1370 struct btrfs_chunk
*c
, int nr
,
1373 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1376 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1377 struct btrfs_chunk
*c
, int nr
)
1379 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1382 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1383 struct btrfs_chunk
*c
, int nr
,
1386 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1389 /* struct btrfs_block_group_item */
1390 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1392 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1394 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1395 struct btrfs_block_group_item
, chunk_objectid
, 64);
1397 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1398 struct btrfs_block_group_item
, chunk_objectid
, 64);
1399 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1400 struct btrfs_block_group_item
, flags
, 64);
1401 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1402 struct btrfs_block_group_item
, flags
, 64);
1404 /* struct btrfs_inode_ref */
1405 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1406 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1408 /* struct btrfs_inode_item */
1409 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1410 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1411 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1412 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1413 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1414 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1415 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1416 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1417 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1418 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1419 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1420 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1422 static inline struct btrfs_timespec
*
1423 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1425 unsigned long ptr
= (unsigned long)inode_item
;
1426 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1427 return (struct btrfs_timespec
*)ptr
;
1430 static inline struct btrfs_timespec
*
1431 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1433 unsigned long ptr
= (unsigned long)inode_item
;
1434 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1435 return (struct btrfs_timespec
*)ptr
;
1438 static inline struct btrfs_timespec
*
1439 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1441 unsigned long ptr
= (unsigned long)inode_item
;
1442 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1443 return (struct btrfs_timespec
*)ptr
;
1446 static inline struct btrfs_timespec
*
1447 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1449 unsigned long ptr
= (unsigned long)inode_item
;
1450 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1451 return (struct btrfs_timespec
*)ptr
;
1454 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1455 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1457 /* struct btrfs_dev_extent */
1458 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1460 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1461 chunk_objectid
, 64);
1462 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1464 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1466 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1468 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1469 return (u8
*)((unsigned long)dev
+ ptr
);
1472 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1473 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1475 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1477 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1480 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1482 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1483 struct btrfs_tree_block_info
*item
,
1484 struct btrfs_disk_key
*key
)
1486 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1489 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1490 struct btrfs_tree_block_info
*item
,
1491 struct btrfs_disk_key
*key
)
1493 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1496 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1498 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1500 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1502 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1505 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1508 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1510 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1513 static inline u32
btrfs_extent_inline_ref_size(int type
)
1515 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1516 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1517 return sizeof(struct btrfs_extent_inline_ref
);
1518 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1519 return sizeof(struct btrfs_shared_data_ref
) +
1520 sizeof(struct btrfs_extent_inline_ref
);
1521 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1522 return sizeof(struct btrfs_extent_data_ref
) +
1523 offsetof(struct btrfs_extent_inline_ref
, offset
);
1528 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1529 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1531 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1532 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1534 /* struct btrfs_node */
1535 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1536 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1538 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1541 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1542 sizeof(struct btrfs_key_ptr
) * nr
;
1543 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1546 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1550 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1551 sizeof(struct btrfs_key_ptr
) * nr
;
1552 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1555 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1558 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1559 sizeof(struct btrfs_key_ptr
) * nr
;
1560 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1563 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1567 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1568 sizeof(struct btrfs_key_ptr
) * nr
;
1569 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1572 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1574 return offsetof(struct btrfs_node
, ptrs
) +
1575 sizeof(struct btrfs_key_ptr
) * nr
;
1578 void btrfs_node_key(struct extent_buffer
*eb
,
1579 struct btrfs_disk_key
*disk_key
, int nr
);
1581 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1582 struct btrfs_disk_key
*disk_key
, int nr
)
1585 ptr
= btrfs_node_key_ptr_offset(nr
);
1586 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1587 struct btrfs_key_ptr
, key
, disk_key
);
1590 /* struct btrfs_item */
1591 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1592 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1594 static inline unsigned long btrfs_item_nr_offset(int nr
)
1596 return offsetof(struct btrfs_leaf
, items
) +
1597 sizeof(struct btrfs_item
) * nr
;
1600 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1603 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1606 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1607 struct btrfs_item
*item
)
1609 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1612 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1614 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1617 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1619 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1622 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1624 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1627 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1628 struct btrfs_disk_key
*disk_key
, int nr
)
1630 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1631 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1634 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1635 struct btrfs_disk_key
*disk_key
, int nr
)
1637 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1638 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1641 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1644 * struct btrfs_root_ref
1646 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1647 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1648 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1650 /* struct btrfs_dir_item */
1651 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1652 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1653 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1654 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1656 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1657 struct btrfs_dir_item
*item
,
1658 struct btrfs_disk_key
*key
)
1660 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1663 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1664 struct btrfs_dir_item
*item
,
1665 struct btrfs_disk_key
*key
)
1667 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1670 /* struct btrfs_disk_key */
1671 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1673 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1674 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1676 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1677 struct btrfs_disk_key
*disk
)
1679 cpu
->offset
= le64_to_cpu(disk
->offset
);
1680 cpu
->type
= disk
->type
;
1681 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1684 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1685 struct btrfs_key
*cpu
)
1687 disk
->offset
= cpu_to_le64(cpu
->offset
);
1688 disk
->type
= cpu
->type
;
1689 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1692 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1693 struct btrfs_key
*key
, int nr
)
1695 struct btrfs_disk_key disk_key
;
1696 btrfs_node_key(eb
, &disk_key
, nr
);
1697 btrfs_disk_key_to_cpu(key
, &disk_key
);
1700 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1701 struct btrfs_key
*key
, int nr
)
1703 struct btrfs_disk_key disk_key
;
1704 btrfs_item_key(eb
, &disk_key
, nr
);
1705 btrfs_disk_key_to_cpu(key
, &disk_key
);
1708 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1709 struct btrfs_dir_item
*item
,
1710 struct btrfs_key
*key
)
1712 struct btrfs_disk_key disk_key
;
1713 btrfs_dir_item_key(eb
, item
, &disk_key
);
1714 btrfs_disk_key_to_cpu(key
, &disk_key
);
1718 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1723 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1728 /* struct btrfs_header */
1729 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1730 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1732 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1733 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1734 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1735 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1737 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1739 return (btrfs_header_flags(eb
) & flag
) == flag
;
1742 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1744 u64 flags
= btrfs_header_flags(eb
);
1745 btrfs_set_header_flags(eb
, flags
| flag
);
1746 return (flags
& flag
) == flag
;
1749 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1751 u64 flags
= btrfs_header_flags(eb
);
1752 btrfs_set_header_flags(eb
, flags
& ~flag
);
1753 return (flags
& flag
) == flag
;
1756 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1758 u64 flags
= btrfs_header_flags(eb
);
1759 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1762 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1765 u64 flags
= btrfs_header_flags(eb
);
1766 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1767 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1768 btrfs_set_header_flags(eb
, flags
);
1771 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1773 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1777 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1779 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1783 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1785 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1789 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1791 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1795 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1800 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1805 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1810 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1812 return btrfs_header_level(eb
) == 0;
1815 /* struct btrfs_root_item */
1816 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1818 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1819 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1820 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1822 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1824 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1825 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1826 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1827 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1828 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1829 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1830 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1831 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1834 /* struct btrfs_super_block */
1836 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1837 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1838 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1840 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1841 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1842 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1843 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1844 struct btrfs_super_block
, chunk_root_generation
, 64);
1845 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1847 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1849 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1850 chunk_root_level
, 8);
1851 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1853 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1854 log_root_transid
, 64);
1855 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1857 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1859 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1861 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1863 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1865 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1867 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1869 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1870 root_dir_objectid
, 64);
1871 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1873 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1875 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1876 compat_ro_flags
, 64);
1877 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1878 incompat_flags
, 64);
1879 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1882 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1884 int t
= btrfs_super_csum_type(s
);
1885 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1886 return btrfs_csum_sizes
[t
];
1889 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1891 return offsetof(struct btrfs_leaf
, items
);
1894 /* struct btrfs_file_extent_item */
1895 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1897 static inline unsigned long
1898 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
1900 unsigned long offset
= (unsigned long)e
;
1901 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1905 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1907 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1910 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1912 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1914 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1915 disk_num_bytes
, 64);
1916 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1918 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1920 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1922 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1924 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1926 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1927 other_encoding
, 16);
1929 /* this returns the number of file bytes represented by the inline item.
1930 * If an item is compressed, this is the uncompressed size
1932 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1933 struct btrfs_file_extent_item
*e
)
1935 return btrfs_file_extent_ram_bytes(eb
, e
);
1939 * this returns the number of bytes used by the item on disk, minus the
1940 * size of any extent headers. If a file is compressed on disk, this is
1941 * the compressed size
1943 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1944 struct btrfs_item
*e
)
1946 unsigned long offset
;
1947 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1948 return btrfs_item_size(eb
, e
) - offset
;
1951 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1953 return sb
->s_fs_info
;
1956 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1957 const char *name
, int len
)
1959 /* if we already have a name just free it */
1962 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1966 memcpy(root
->name
, name
, len
);
1967 root
->name
[len
] = '\0';
1972 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
1975 return root
->leafsize
;
1976 return root
->nodesize
;
1979 /* helper function to cast into the data area of the leaf. */
1980 #define btrfs_item_ptr(leaf, slot, type) \
1981 ((type *)(btrfs_leaf_data(leaf) + \
1982 btrfs_item_offset_nr(leaf, slot)))
1984 #define btrfs_item_ptr_offset(leaf, slot) \
1985 ((unsigned long)(btrfs_leaf_data(leaf) + \
1986 btrfs_item_offset_nr(leaf, slot)))
1988 static inline struct dentry
*fdentry(struct file
*file
)
1990 return file
->f_path
.dentry
;
1994 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
1995 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
1996 struct btrfs_root
*root
, unsigned long count
);
1997 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1998 int btrfs_pin_extent(struct btrfs_root
*root
,
1999 u64 bytenr
, u64 num
, int reserved
);
2000 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
2001 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2002 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2003 struct btrfs_root
*root
,
2004 u64 objectid
, u64 offset
, u64 bytenr
);
2005 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
2006 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2007 struct btrfs_fs_info
*info
,
2009 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2010 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2011 u64 search_start
, u64 search_hint
, int owner
);
2012 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2013 struct btrfs_root
*root
, u32 blocksize
,
2014 u64 parent
, u64 root_objectid
,
2015 struct btrfs_disk_key
*key
, int level
,
2016 u64 hint
, u64 empty_size
);
2017 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2018 struct btrfs_root
*root
,
2019 struct extent_buffer
*buf
,
2020 u64 parent
, int last_ref
);
2021 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2022 struct btrfs_root
*root
,
2023 u64 bytenr
, u32 blocksize
,
2025 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2026 struct btrfs_root
*root
,
2027 u64 root_objectid
, u64 owner
,
2028 u64 offset
, struct btrfs_key
*ins
);
2029 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2030 struct btrfs_root
*root
,
2031 u64 root_objectid
, u64 owner
, u64 offset
,
2032 struct btrfs_key
*ins
);
2033 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2034 struct btrfs_root
*root
,
2035 u64 num_bytes
, u64 min_alloc_size
,
2036 u64 empty_size
, u64 hint_byte
,
2037 u64 search_end
, struct btrfs_key
*ins
,
2039 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2040 struct extent_buffer
*buf
, int full_backref
);
2041 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2042 struct extent_buffer
*buf
, int full_backref
);
2043 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2044 struct btrfs_root
*root
,
2045 u64 bytenr
, u64 num_bytes
, u64 flags
,
2047 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2048 struct btrfs_root
*root
,
2049 u64 bytenr
, u64 num_bytes
, u64 parent
,
2050 u64 root_objectid
, u64 owner
, u64 offset
);
2052 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2053 int btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2054 struct btrfs_root
*root
);
2055 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2056 struct btrfs_root
*root
);
2057 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2058 struct btrfs_root
*root
,
2059 u64 bytenr
, u64 num_bytes
, u64 parent
,
2060 u64 root_objectid
, u64 owner
, u64 offset
);
2062 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2063 struct btrfs_root
*root
);
2064 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2065 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2066 int btrfs_read_block_groups(struct btrfs_root
*root
);
2067 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2068 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2069 struct btrfs_root
*root
, u64 bytes_used
,
2070 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2072 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2073 struct btrfs_root
*root
, u64 group_start
);
2074 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2075 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2076 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2078 int btrfs_reserve_metadata_space(struct btrfs_root
*root
, int num_items
);
2079 int btrfs_unreserve_metadata_space(struct btrfs_root
*root
, int num_items
);
2080 int btrfs_unreserve_metadata_for_delalloc(struct btrfs_root
*root
,
2081 struct inode
*inode
, int num_items
);
2082 int btrfs_reserve_metadata_for_delalloc(struct btrfs_root
*root
,
2083 struct inode
*inode
, int num_items
);
2084 int btrfs_check_data_free_space(struct btrfs_root
*root
, struct inode
*inode
,
2086 void btrfs_free_reserved_data_space(struct btrfs_root
*root
,
2087 struct inode
*inode
, u64 bytes
);
2088 void btrfs_delalloc_reserve_space(struct btrfs_root
*root
, struct inode
*inode
,
2090 void btrfs_delalloc_free_space(struct btrfs_root
*root
, struct inode
*inode
,
2092 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2093 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2094 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2095 struct btrfs_block_rsv
*rsv
);
2096 void btrfs_add_durable_block_rsv(struct btrfs_fs_info
*fs_info
,
2097 struct btrfs_block_rsv
*rsv
);
2098 int btrfs_block_rsv_add(struct btrfs_trans_handle
*trans
,
2099 struct btrfs_root
*root
,
2100 struct btrfs_block_rsv
*block_rsv
,
2101 u64 num_bytes
, int *retries
);
2102 int btrfs_block_rsv_check(struct btrfs_trans_handle
*trans
,
2103 struct btrfs_root
*root
,
2104 struct btrfs_block_rsv
*block_rsv
,
2105 u64 min_reserved
, int min_factor
);
2106 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2107 struct btrfs_block_rsv
*dst_rsv
,
2109 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2110 struct btrfs_block_rsv
*block_rsv
,
2112 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2113 struct btrfs_block_group_cache
*cache
);
2114 int btrfs_set_block_group_rw(struct btrfs_root
*root
,
2115 struct btrfs_block_group_cache
*cache
);
2117 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2118 int level
, int *slot
);
2119 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2120 int btrfs_previous_item(struct btrfs_root
*root
,
2121 struct btrfs_path
*path
, u64 min_objectid
,
2123 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2124 struct btrfs_root
*root
, struct btrfs_path
*path
,
2125 struct btrfs_key
*new_key
);
2126 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2127 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2128 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2129 struct btrfs_key
*key
, int lowest_level
,
2130 int cache_only
, u64 min_trans
);
2131 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2132 struct btrfs_key
*max_key
,
2133 struct btrfs_path
*path
, int cache_only
,
2135 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2136 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2137 struct extent_buffer
*parent
, int parent_slot
,
2138 struct extent_buffer
**cow_ret
);
2139 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2140 struct btrfs_root
*root
,
2141 struct extent_buffer
*buf
,
2142 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2143 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2144 struct extent_buffer
*buf
);
2145 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2146 *root
, struct btrfs_path
*path
, u32 data_size
);
2147 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2148 struct btrfs_root
*root
,
2149 struct btrfs_path
*path
,
2150 u32 new_size
, int from_end
);
2151 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2152 struct btrfs_root
*root
,
2153 struct btrfs_path
*path
,
2154 struct btrfs_key
*new_key
,
2155 unsigned long split_offset
);
2156 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2157 struct btrfs_root
*root
,
2158 struct btrfs_path
*path
,
2159 struct btrfs_key
*new_key
);
2160 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2161 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2163 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2164 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2165 int start_slot
, int cache_only
, u64
*last_ret
,
2166 struct btrfs_key
*progress
);
2167 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
2168 struct btrfs_path
*btrfs_alloc_path(void);
2169 void btrfs_free_path(struct btrfs_path
*p
);
2170 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2171 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2173 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2174 struct btrfs_path
*path
, int slot
, int nr
);
2175 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2176 struct btrfs_root
*root
,
2177 struct btrfs_path
*path
)
2179 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2182 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2183 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2184 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
2185 struct btrfs_root
*root
,
2186 struct btrfs_path
*path
,
2187 struct btrfs_key
*cpu_key
, u32
*data_size
,
2189 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2190 struct btrfs_root
*root
,
2191 struct btrfs_path
*path
,
2192 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2194 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2195 struct btrfs_root
*root
,
2196 struct btrfs_path
*path
,
2197 struct btrfs_key
*key
,
2200 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2203 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2204 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2205 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2206 int btrfs_drop_snapshot(struct btrfs_root
*root
, int update_ref
);
2207 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2208 struct btrfs_root
*root
,
2209 struct extent_buffer
*node
,
2210 struct extent_buffer
*parent
);
2212 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2213 struct btrfs_path
*path
,
2214 u64 root_id
, u64 ref_id
);
2215 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2216 struct btrfs_root
*tree_root
,
2217 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2218 const char *name
, int name_len
);
2219 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2220 struct btrfs_root
*tree_root
,
2221 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2222 const char *name
, int name_len
);
2223 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2224 struct btrfs_key
*key
);
2225 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2226 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2228 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2229 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2231 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2232 btrfs_root_item
*item
, struct btrfs_key
*key
);
2233 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
2234 u64
*found_objectid
);
2235 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2236 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2237 int btrfs_set_root_node(struct btrfs_root_item
*item
,
2238 struct extent_buffer
*node
);
2240 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2241 struct btrfs_root
*root
, const char *name
,
2242 int name_len
, u64 dir
,
2243 struct btrfs_key
*location
, u8 type
, u64 index
);
2244 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2245 struct btrfs_root
*root
,
2246 struct btrfs_path
*path
, u64 dir
,
2247 const char *name
, int name_len
,
2249 struct btrfs_dir_item
*
2250 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2251 struct btrfs_root
*root
,
2252 struct btrfs_path
*path
, u64 dir
,
2253 u64 objectid
, const char *name
, int name_len
,
2255 struct btrfs_dir_item
*
2256 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2257 struct btrfs_path
*path
, u64 dirid
,
2258 const char *name
, int name_len
);
2259 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2260 struct btrfs_path
*path
,
2261 const char *name
, int name_len
);
2262 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2263 struct btrfs_root
*root
,
2264 struct btrfs_path
*path
,
2265 struct btrfs_dir_item
*di
);
2266 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2267 struct btrfs_root
*root
,
2268 struct btrfs_path
*path
, u64 objectid
,
2269 const char *name
, u16 name_len
,
2270 const void *data
, u16 data_len
);
2271 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2272 struct btrfs_root
*root
,
2273 struct btrfs_path
*path
, u64 dir
,
2274 const char *name
, u16 name_len
,
2278 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2279 struct btrfs_root
*root
, u64 offset
);
2280 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2281 struct btrfs_root
*root
, u64 offset
);
2282 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2285 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2286 struct btrfs_root
*fs_root
,
2287 u64 dirid
, u64
*objectid
);
2288 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2291 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2292 struct btrfs_root
*root
,
2293 const char *name
, int name_len
,
2294 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2295 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2296 struct btrfs_root
*root
,
2297 const char *name
, int name_len
,
2298 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2299 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2300 struct btrfs_root
*root
,
2301 struct btrfs_path
*path
, u64 objectid
);
2302 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2303 *root
, struct btrfs_path
*path
,
2304 struct btrfs_key
*location
, int mod
);
2307 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2308 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2309 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2310 struct bio
*bio
, u32
*dst
);
2311 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2312 struct btrfs_root
*root
,
2313 u64 objectid
, u64 pos
,
2314 u64 disk_offset
, u64 disk_num_bytes
,
2315 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2316 u8 compression
, u8 encryption
, u16 other_encoding
);
2317 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2318 struct btrfs_root
*root
,
2319 struct btrfs_path
*path
, u64 objectid
,
2320 u64 bytenr
, int mod
);
2321 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2322 struct btrfs_root
*root
,
2323 struct btrfs_ordered_sum
*sums
);
2324 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2325 struct bio
*bio
, u64 file_start
, int contig
);
2326 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
2327 u64 start
, unsigned long len
);
2328 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2329 struct btrfs_root
*root
,
2330 struct btrfs_path
*path
,
2331 u64 bytenr
, int cow
);
2332 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2333 struct btrfs_root
*root
, struct btrfs_path
*path
,
2335 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
2336 u64 end
, struct list_head
*list
);
2339 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2340 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2341 #define ClearPageChecked ClearPageFsMisc
2342 #define SetPageChecked SetPageFsMisc
2343 #define PageChecked PageFsMisc
2346 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2347 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2348 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2349 struct btrfs_root
*root
,
2350 struct inode
*dir
, struct inode
*inode
,
2351 const char *name
, int name_len
);
2352 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2353 struct inode
*parent_inode
, struct inode
*inode
,
2354 const char *name
, int name_len
, int add_backref
, u64 index
);
2355 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2356 struct btrfs_root
*root
,
2357 struct inode
*dir
, u64 objectid
,
2358 const char *name
, int name_len
);
2359 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2360 struct btrfs_root
*root
,
2361 struct inode
*inode
, u64 new_size
,
2364 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2365 int btrfs_start_one_delalloc_inode(struct btrfs_root
*root
, int delay_iput
);
2366 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
2367 struct extent_state
**cached_state
);
2368 int btrfs_writepages(struct address_space
*mapping
,
2369 struct writeback_control
*wbc
);
2370 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2371 struct btrfs_root
*new_root
,
2372 u64 new_dirid
, u64 alloc_hint
);
2373 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2374 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2376 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2377 struct file_ra_state
*ra
, struct file
*file
,
2378 pgoff_t offset
, pgoff_t last_index
);
2379 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2380 int btrfs_readpage(struct file
*file
, struct page
*page
);
2381 void btrfs_delete_inode(struct inode
*inode
);
2382 void btrfs_put_inode(struct inode
*inode
);
2383 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
2384 void btrfs_dirty_inode(struct inode
*inode
);
2385 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2386 void btrfs_destroy_inode(struct inode
*inode
);
2387 void btrfs_drop_inode(struct inode
*inode
);
2388 int btrfs_init_cachep(void);
2389 void btrfs_destroy_cachep(void);
2390 long btrfs_ioctl_trans_end(struct file
*file
);
2391 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2392 struct btrfs_root
*root
, int *was_new
);
2393 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2394 unsigned from
, unsigned to
);
2395 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2396 size_t page_offset
, u64 start
, u64 end
,
2398 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2399 struct btrfs_root
*root
,
2400 struct inode
*inode
);
2401 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2402 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2403 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
2404 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
2405 int btrfs_invalidate_inodes(struct btrfs_root
*root
);
2406 void btrfs_add_delayed_iput(struct inode
*inode
);
2407 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
2408 extern const struct dentry_operations btrfs_dentry_operations
;
2411 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2412 void btrfs_update_iflags(struct inode
*inode
);
2413 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2416 int btrfs_sync_file(struct file
*file
, struct dentry
*dentry
, int datasync
);
2417 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2419 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2420 extern const struct file_operations btrfs_file_operations
;
2421 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
2422 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
2423 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2424 struct inode
*inode
, u64 start
, u64 end
);
2425 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2428 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2429 struct btrfs_root
*root
, int cache_only
);
2432 int btrfs_init_sysfs(void);
2433 void btrfs_exit_sysfs(void);
2434 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2435 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2436 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2437 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2440 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2443 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2444 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2447 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2448 int btrfs_check_acl(struct inode
*inode
, int mask
);
2450 #define btrfs_check_acl NULL
2452 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2453 struct inode
*inode
, struct inode
*dir
);
2454 int btrfs_acl_chmod(struct inode
*inode
);
2457 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
2458 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
2459 struct btrfs_root
*root
);
2460 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
2461 struct btrfs_root
*root
);
2462 int btrfs_recover_relocation(struct btrfs_root
*root
);
2463 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);