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 struct btrfs_pending_snapshot
;
38 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
39 extern struct kmem_cache
*btrfs_transaction_cachep
;
40 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
41 extern struct kmem_cache
*btrfs_path_cachep
;
42 struct btrfs_ordered_sum
;
44 #define BTRFS_MAGIC "_BHRfS_M"
46 #define BTRFS_MAX_LEVEL 8
48 #define BTRFS_COMPAT_EXTENT_TREE_V0
51 * files bigger than this get some pre-flushing when they are added
52 * to the ordered operations list. That way we limit the total
53 * work done by the commit
55 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
57 /* holds pointers to all of the tree roots */
58 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
60 /* stores information about which extents are in use, and reference counts */
61 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
64 * chunk tree stores translations from logical -> physical block numbering
65 * the super block points to the chunk tree
67 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
70 * stores information about which areas of a given device are in use.
71 * one per device. The tree of tree roots points to the device tree
73 #define BTRFS_DEV_TREE_OBJECTID 4ULL
75 /* one per subvolume, storing files and directories */
76 #define BTRFS_FS_TREE_OBJECTID 5ULL
78 /* directory objectid inside the root tree */
79 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
81 /* holds checksums of all the data extents */
82 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
84 /* orhpan objectid for tracking unlinked/truncated files */
85 #define BTRFS_ORPHAN_OBJECTID -5ULL
87 /* does write ahead logging to speed up fsyncs */
88 #define BTRFS_TREE_LOG_OBJECTID -6ULL
89 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
91 /* for space balancing */
92 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
93 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
96 * extent checksums all have this objectid
97 * this allows them to share the logging tree
100 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
102 /* dummy objectid represents multiple objectids */
103 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
106 * All files have objectids in this range.
108 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
109 #define BTRFS_LAST_FREE_OBJECTID -256ULL
110 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
114 * the device items go into the chunk tree. The key is in the form
115 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
117 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
119 #define BTRFS_BTREE_INODE_OBJECTID 1
121 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
124 * we can actually store much bigger names, but lets not confuse the rest
127 #define BTRFS_NAME_LEN 255
129 /* 32 bytes in various csum fields */
130 #define BTRFS_CSUM_SIZE 32
133 #define BTRFS_CSUM_TYPE_CRC32 0
135 static int btrfs_csum_sizes
[] = { 4, 0 };
137 /* four bytes for CRC32 */
138 #define BTRFS_EMPTY_DIR_SIZE 0
140 #define BTRFS_FT_UNKNOWN 0
141 #define BTRFS_FT_REG_FILE 1
142 #define BTRFS_FT_DIR 2
143 #define BTRFS_FT_CHRDEV 3
144 #define BTRFS_FT_BLKDEV 4
145 #define BTRFS_FT_FIFO 5
146 #define BTRFS_FT_SOCK 6
147 #define BTRFS_FT_SYMLINK 7
148 #define BTRFS_FT_XATTR 8
149 #define BTRFS_FT_MAX 9
152 * The key defines the order in the tree, and so it also defines (optimal)
155 * objectid corresponds to the inode number.
157 * type tells us things about the object, and is a kind of stream selector.
158 * so for a given inode, keys with type of 1 might refer to the inode data,
159 * type of 2 may point to file data in the btree and type == 3 may point to
162 * offset is the starting byte offset for this key in the stream.
164 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
165 * in cpu native order. Otherwise they are identical and their sizes
166 * should be the same (ie both packed)
168 struct btrfs_disk_key
{
172 } __attribute__ ((__packed__
));
178 } __attribute__ ((__packed__
));
180 struct btrfs_mapping_tree
{
181 struct extent_map_tree map_tree
;
184 #define BTRFS_UUID_SIZE 16
185 struct btrfs_dev_item
{
186 /* the internal btrfs device id */
189 /* size of the device */
195 /* optimal io alignment for this device */
198 /* optimal io width for this device */
201 /* minimal io size for this device */
204 /* type and info about this device */
207 /* expected generation for this device */
211 * starting byte of this partition on the device,
212 * to allow for stripe alignment in the future
216 /* grouping information for allocation decisions */
219 /* seek speed 0-100 where 100 is fastest */
222 /* bandwidth 0-100 where 100 is fastest */
225 /* btrfs generated uuid for this device */
226 u8 uuid
[BTRFS_UUID_SIZE
];
228 /* uuid of FS who owns this device */
229 u8 fsid
[BTRFS_UUID_SIZE
];
230 } __attribute__ ((__packed__
));
232 struct btrfs_stripe
{
235 u8 dev_uuid
[BTRFS_UUID_SIZE
];
236 } __attribute__ ((__packed__
));
239 /* size of this chunk in bytes */
242 /* objectid of the root referencing this chunk */
248 /* optimal io alignment for this chunk */
251 /* optimal io width for this chunk */
254 /* minimal io size for this chunk */
257 /* 2^16 stripes is quite a lot, a second limit is the size of a single
262 /* sub stripes only matter for raid10 */
264 struct btrfs_stripe stripe
;
265 /* additional stripes go here */
266 } __attribute__ ((__packed__
));
268 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
270 BUG_ON(num_stripes
== 0);
271 return sizeof(struct btrfs_chunk
) +
272 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
275 #define BTRFS_FSID_SIZE 16
276 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
277 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
278 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
279 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
281 #define BTRFS_BACKREF_REV_MAX 256
282 #define BTRFS_BACKREF_REV_SHIFT 56
283 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
284 BTRFS_BACKREF_REV_SHIFT)
286 #define BTRFS_OLD_BACKREF_REV 0
287 #define BTRFS_MIXED_BACKREF_REV 1
290 * every tree block (leaf or node) starts with this header.
292 struct btrfs_header
{
293 /* these first four must match the super block */
294 u8 csum
[BTRFS_CSUM_SIZE
];
295 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
296 __le64 bytenr
; /* which block this node is supposed to live in */
299 /* allowed to be different from the super from here on down */
300 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
305 } __attribute__ ((__packed__
));
307 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
308 sizeof(struct btrfs_header)) / \
309 sizeof(struct btrfs_key_ptr))
310 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
311 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
312 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
313 sizeof(struct btrfs_item) - \
314 sizeof(struct btrfs_file_extent_item))
315 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
316 sizeof(struct btrfs_item) -\
317 sizeof(struct btrfs_dir_item))
321 * this is a very generous portion of the super block, giving us
322 * room to translate 14 chunks with 3 stripes each.
324 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
325 #define BTRFS_LABEL_SIZE 256
328 * the super block basically lists the main trees of the FS
329 * it currently lacks any block count etc etc
331 struct btrfs_super_block
{
332 u8 csum
[BTRFS_CSUM_SIZE
];
333 /* the first 4 fields must match struct btrfs_header */
334 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
335 __le64 bytenr
; /* this block number */
338 /* allowed to be different from the btrfs_header from here own down */
345 /* this will help find the new super based on the log root */
346 __le64 log_root_transid
;
349 __le64 root_dir_objectid
;
355 __le32 sys_chunk_array_size
;
356 __le64 chunk_root_generation
;
358 __le64 compat_ro_flags
;
359 __le64 incompat_flags
;
364 struct btrfs_dev_item dev_item
;
366 char label
[BTRFS_LABEL_SIZE
];
368 /* future expansion */
370 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
371 } __attribute__ ((__packed__
));
374 * Compat flags that we support. If any incompat flags are set other than the
375 * ones specified below then we will fail to mount
377 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
378 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (2ULL << 0)
380 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
381 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
382 #define BTRFS_FEATURE_INCOMPAT_SUPP \
383 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
384 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL)
387 * A leaf is full of items. offset and size tell us where to find
388 * the item in the leaf (relative to the start of the data area)
391 struct btrfs_disk_key key
;
394 } __attribute__ ((__packed__
));
397 * leaves have an item area and a data area:
398 * [item0, item1....itemN] [free space] [dataN...data1, data0]
400 * The data is separate from the items to get the keys closer together
404 struct btrfs_header header
;
405 struct btrfs_item items
[];
406 } __attribute__ ((__packed__
));
409 * all non-leaf blocks are nodes, they hold only keys and pointers to
412 struct btrfs_key_ptr
{
413 struct btrfs_disk_key key
;
416 } __attribute__ ((__packed__
));
419 struct btrfs_header header
;
420 struct btrfs_key_ptr ptrs
[];
421 } __attribute__ ((__packed__
));
424 * btrfs_paths remember the path taken from the root down to the leaf.
425 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
426 * to any other levels that are present.
428 * The slots array records the index of the item or block pointer
429 * used while walking the tree.
432 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
433 int slots
[BTRFS_MAX_LEVEL
];
434 /* if there is real range locking, this locks field will change */
435 int locks
[BTRFS_MAX_LEVEL
];
437 /* keep some upper locks as we walk down */
441 * set by btrfs_split_item, tells search_slot to keep all locks
442 * and to force calls to keep space in the nodes
444 unsigned int search_for_split
:1;
445 unsigned int keep_locks
:1;
446 unsigned int skip_locking
:1;
447 unsigned int leave_spinning
:1;
448 unsigned int search_commit_root
:1;
452 * items in the extent btree are used to record the objectid of the
453 * owner of the block and the number of references
456 struct btrfs_extent_item
{
460 } __attribute__ ((__packed__
));
462 struct btrfs_extent_item_v0
{
464 } __attribute__ ((__packed__
));
466 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
467 sizeof(struct btrfs_item))
469 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
470 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
472 /* following flags only apply to tree blocks */
474 /* use full backrefs for extent pointers in the block */
475 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
477 struct btrfs_tree_block_info
{
478 struct btrfs_disk_key key
;
480 } __attribute__ ((__packed__
));
482 struct btrfs_extent_data_ref
{
487 } __attribute__ ((__packed__
));
489 struct btrfs_shared_data_ref
{
491 } __attribute__ ((__packed__
));
493 struct btrfs_extent_inline_ref
{
496 } __attribute__ ((__packed__
));
498 /* old style backrefs item */
499 struct btrfs_extent_ref_v0
{
504 } __attribute__ ((__packed__
));
507 /* dev extents record free space on individual devices. The owner
508 * field points back to the chunk allocation mapping tree that allocated
509 * the extent. The chunk tree uuid field is a way to double check the owner
511 struct btrfs_dev_extent
{
513 __le64 chunk_objectid
;
516 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
517 } __attribute__ ((__packed__
));
519 struct btrfs_inode_ref
{
523 } __attribute__ ((__packed__
));
525 struct btrfs_timespec
{
528 } __attribute__ ((__packed__
));
530 enum btrfs_compression_type
{
531 BTRFS_COMPRESS_NONE
= 0,
532 BTRFS_COMPRESS_ZLIB
= 1,
533 BTRFS_COMPRESS_LAST
= 2,
536 struct btrfs_inode_item
{
537 /* nfs style generation number */
539 /* transid that last touched this inode */
551 /* modification sequence number for NFS */
555 * a little future expansion, for more than this we can
556 * just grow the inode item and version it
559 struct btrfs_timespec atime
;
560 struct btrfs_timespec ctime
;
561 struct btrfs_timespec mtime
;
562 struct btrfs_timespec otime
;
563 } __attribute__ ((__packed__
));
565 struct btrfs_dir_log_item
{
567 } __attribute__ ((__packed__
));
569 struct btrfs_dir_item
{
570 struct btrfs_disk_key location
;
575 } __attribute__ ((__packed__
));
577 struct btrfs_root_item
{
578 struct btrfs_inode_item inode
;
584 __le64 last_snapshot
;
587 struct btrfs_disk_key drop_progress
;
590 } __attribute__ ((__packed__
));
593 * this is used for both forward and backward root refs
595 struct btrfs_root_ref
{
599 } __attribute__ ((__packed__
));
601 #define BTRFS_FILE_EXTENT_INLINE 0
602 #define BTRFS_FILE_EXTENT_REG 1
603 #define BTRFS_FILE_EXTENT_PREALLOC 2
605 struct btrfs_file_extent_item
{
607 * transaction id that created this extent
611 * max number of bytes to hold this extent in ram
612 * when we split a compressed extent we can't know how big
613 * each of the resulting pieces will be. So, this is
614 * an upper limit on the size of the extent in ram instead of
620 * 32 bits for the various ways we might encode the data,
621 * including compression and encryption. If any of these
622 * are set to something a given disk format doesn't understand
623 * it is treated like an incompat flag for reading and writing,
628 __le16 other_encoding
; /* spare for later use */
630 /* are we inline data or a real extent? */
634 * disk space consumed by the extent, checksum blocks are included
638 __le64 disk_num_bytes
;
640 * the logical offset in file blocks (no csums)
641 * this extent record is for. This allows a file extent to point
642 * into the middle of an existing extent on disk, sharing it
643 * between two snapshots (useful if some bytes in the middle of the
644 * extent have changed
648 * the logical number of file blocks (no csums included). This
649 * always reflects the size uncompressed and without encoding.
653 } __attribute__ ((__packed__
));
655 struct btrfs_csum_item
{
657 } __attribute__ ((__packed__
));
659 /* different types of block groups (and chunks) */
660 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
661 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
662 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
663 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
664 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
665 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
666 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
667 #define BTRFS_NR_RAID_TYPES 5
669 struct btrfs_block_group_item
{
671 __le64 chunk_objectid
;
673 } __attribute__ ((__packed__
));
675 struct btrfs_space_info
{
678 u64 total_bytes
; /* total bytes in the space */
679 u64 bytes_used
; /* total bytes used,
680 this does't take mirrors into account */
681 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
682 transaction finishes */
683 u64 bytes_reserved
; /* total bytes the allocator has reserved for
684 current allocations */
685 u64 bytes_readonly
; /* total bytes that are read only */
687 u64 bytes_may_use
; /* number of bytes that may be used for
688 delalloc/allocations */
689 u64 disk_used
; /* total bytes used on disk */
691 int full
; /* indicates that we cannot allocate any more
692 chunks for this space */
693 int force_alloc
; /* set if we need to force a chunk alloc for
696 struct list_head list
;
698 /* for block groups in our same type */
699 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
701 struct rw_semaphore groups_sem
;
702 atomic_t caching_threads
;
705 struct btrfs_block_rsv
{
709 struct btrfs_space_info
*space_info
;
710 struct list_head list
;
713 unsigned int priority
:8;
714 unsigned int durable
:1;
715 unsigned int refill_used
:1;
720 * free clusters are used to claim free space in relatively large chunks,
721 * allowing us to do less seeky writes. They are used for all metadata
722 * allocations and data allocations in ssd mode.
724 struct btrfs_free_cluster
{
726 spinlock_t refill_lock
;
729 /* largest extent in this cluster */
732 /* first extent starting offset */
735 /* if this cluster simply points at a bitmap in the block group */
736 bool points_to_bitmap
;
738 struct btrfs_block_group_cache
*block_group
;
740 * when a cluster is allocated from a block group, we put the
741 * cluster onto a list in the block group so that it can
742 * be freed before the block group is freed.
744 struct list_head block_group_list
;
747 enum btrfs_caching_type
{
749 BTRFS_CACHE_STARTED
= 1,
750 BTRFS_CACHE_FINISHED
= 2,
753 struct btrfs_caching_control
{
754 struct list_head list
;
756 wait_queue_head_t wait
;
757 struct btrfs_block_group_cache
*block_group
;
762 struct btrfs_block_group_cache
{
763 struct btrfs_key key
;
764 struct btrfs_block_group_item item
;
765 struct btrfs_fs_info
*fs_info
;
779 /* cache tracking stuff */
781 struct btrfs_caching_control
*caching_ctl
;
782 u64 last_byte_to_unpin
;
784 struct btrfs_space_info
*space_info
;
786 /* free space cache stuff */
787 spinlock_t tree_lock
;
788 struct rb_root free_space_offset
;
791 /* block group cache stuff */
792 struct rb_node cache_node
;
794 /* for block groups in the same raid type */
795 struct list_head list
;
800 /* List of struct btrfs_free_clusters for this block group.
801 * Today it will only have one thing on it, but that may change
803 struct list_head cluster_list
;
806 struct reloc_control
;
808 struct btrfs_fs_devices
;
809 struct btrfs_fs_info
{
810 u8 fsid
[BTRFS_FSID_SIZE
];
811 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
812 struct btrfs_root
*extent_root
;
813 struct btrfs_root
*tree_root
;
814 struct btrfs_root
*chunk_root
;
815 struct btrfs_root
*dev_root
;
816 struct btrfs_root
*fs_root
;
817 struct btrfs_root
*csum_root
;
819 /* the log root tree is a directory of all the other log roots */
820 struct btrfs_root
*log_root_tree
;
822 spinlock_t fs_roots_radix_lock
;
823 struct radix_tree_root fs_roots_radix
;
825 /* block group cache stuff */
826 spinlock_t block_group_cache_lock
;
827 struct rb_root block_group_cache_tree
;
829 struct extent_io_tree freed_extents
[2];
830 struct extent_io_tree
*pinned_extents
;
832 /* logical->physical extent mapping */
833 struct btrfs_mapping_tree mapping_tree
;
835 /* block reservation for extent, checksum and root tree */
836 struct btrfs_block_rsv global_block_rsv
;
837 /* block reservation for delay allocation */
838 struct btrfs_block_rsv delalloc_block_rsv
;
839 /* block reservation for metadata operations */
840 struct btrfs_block_rsv trans_block_rsv
;
841 /* block reservation for chunk tree */
842 struct btrfs_block_rsv chunk_block_rsv
;
844 struct btrfs_block_rsv empty_block_rsv
;
846 /* list of block reservations that cross multiple transactions */
847 struct list_head durable_block_rsv_list
;
849 struct mutex durable_block_rsv_mutex
;
852 u64 last_trans_committed
;
855 * this is updated to the current trans every time a full commit
856 * is required instead of the faster short fsync log commits
858 u64 last_trans_log_full_commit
;
859 u64 open_ioctl_trans
;
860 unsigned long mount_opt
;
863 struct btrfs_transaction
*running_transaction
;
864 wait_queue_head_t transaction_throttle
;
865 wait_queue_head_t transaction_wait
;
866 wait_queue_head_t async_submit_wait
;
868 struct btrfs_super_block super_copy
;
869 struct btrfs_super_block super_for_commit
;
870 struct block_device
*__bdev
;
871 struct super_block
*sb
;
872 struct inode
*btree_inode
;
873 struct backing_dev_info bdi
;
874 struct mutex trans_mutex
;
875 struct mutex tree_log_mutex
;
876 struct mutex transaction_kthread_mutex
;
877 struct mutex cleaner_mutex
;
878 struct mutex chunk_mutex
;
879 struct mutex volume_mutex
;
881 * this protects the ordered operations list only while we are
882 * processing all of the entries on it. This way we make
883 * sure the commit code doesn't find the list temporarily empty
884 * because another function happens to be doing non-waiting preflush
885 * before jumping into the main commit.
887 struct mutex ordered_operations_mutex
;
888 struct rw_semaphore extent_commit_sem
;
890 struct rw_semaphore cleanup_work_sem
;
892 struct rw_semaphore subvol_sem
;
893 struct srcu_struct subvol_srcu
;
895 struct list_head trans_list
;
896 struct list_head hashers
;
897 struct list_head dead_roots
;
898 struct list_head caching_block_groups
;
900 spinlock_t delayed_iput_lock
;
901 struct list_head delayed_iputs
;
903 atomic_t nr_async_submits
;
904 atomic_t async_submit_draining
;
905 atomic_t nr_async_bios
;
906 atomic_t async_delalloc_pages
;
909 * this is used by the balancing code to wait for all the pending
912 spinlock_t ordered_extent_lock
;
915 * all of the data=ordered extents pending writeback
916 * these can span multiple transactions and basically include
917 * every dirty data page that isn't from nodatacow
919 struct list_head ordered_extents
;
922 * all of the inodes that have delalloc bytes. It is possible for
923 * this list to be empty even when there is still dirty data=ordered
924 * extents waiting to finish IO.
926 struct list_head delalloc_inodes
;
929 * special rename and truncate targets that must be on disk before
930 * we're allowed to commit. This is basically the ext3 style
933 struct list_head ordered_operations
;
936 * there is a pool of worker threads for checksumming during writes
937 * and a pool for checksumming after reads. This is because readers
938 * can run with FS locks held, and the writers may be waiting for
939 * those locks. We don't want ordering in the pending list to cause
940 * deadlocks, and so the two are serviced separately.
942 * A third pool does submit_bio to avoid deadlocking with the other
945 struct btrfs_workers generic_worker
;
946 struct btrfs_workers workers
;
947 struct btrfs_workers delalloc_workers
;
948 struct btrfs_workers endio_workers
;
949 struct btrfs_workers endio_meta_workers
;
950 struct btrfs_workers endio_meta_write_workers
;
951 struct btrfs_workers endio_write_workers
;
952 struct btrfs_workers submit_workers
;
954 * fixup workers take dirty pages that didn't properly go through
955 * the cow mechanism and make them safe to write. It happens
956 * for the sys_munmap function call path
958 struct btrfs_workers fixup_workers
;
959 struct task_struct
*transaction_kthread
;
960 struct task_struct
*cleaner_kthread
;
961 int thread_pool_size
;
963 struct kobject super_kobj
;
964 struct completion kobj_unregister
;
967 int log_root_recovering
;
972 /* protected by the delalloc lock, used to keep from writing
973 * metadata until there is a nice batch
975 u64 dirty_metadata_bytes
;
976 struct list_head dirty_cowonly_roots
;
978 struct btrfs_fs_devices
*fs_devices
;
981 * the space_info list is almost entirely read only. It only changes
982 * when we add a new raid type to the FS, and that happens
983 * very rarely. RCU is used to protect it.
985 struct list_head space_info
;
987 struct reloc_control
*reloc_ctl
;
989 spinlock_t delalloc_lock
;
990 spinlock_t new_trans_lock
;
993 /* data_alloc_cluster is only used in ssd mode */
994 struct btrfs_free_cluster data_alloc_cluster
;
996 /* all metadata allocations go through this cluster */
997 struct btrfs_free_cluster meta_alloc_cluster
;
999 spinlock_t ref_cache_lock
;
1000 u64 total_ref_cache_size
;
1002 u64 avail_data_alloc_bits
;
1003 u64 avail_metadata_alloc_bits
;
1004 u64 avail_system_alloc_bits
;
1005 u64 data_alloc_profile
;
1006 u64 metadata_alloc_profile
;
1007 u64 system_alloc_profile
;
1009 unsigned data_chunk_allocations
;
1010 unsigned metadata_ratio
;
1016 * in ram representation of the tree. extent_root is used for all allocations
1017 * and for the extent tree extent_root root.
1020 struct extent_buffer
*node
;
1022 /* the node lock is held while changing the node pointer */
1023 spinlock_t node_lock
;
1025 struct extent_buffer
*commit_root
;
1026 struct btrfs_root
*log_root
;
1027 struct btrfs_root
*reloc_root
;
1029 struct btrfs_root_item root_item
;
1030 struct btrfs_key root_key
;
1031 struct btrfs_fs_info
*fs_info
;
1032 struct extent_io_tree dirty_log_pages
;
1034 struct kobject root_kobj
;
1035 struct completion kobj_unregister
;
1036 struct mutex objectid_mutex
;
1038 spinlock_t accounting_lock
;
1039 struct btrfs_block_rsv
*block_rsv
;
1041 struct mutex log_mutex
;
1042 wait_queue_head_t log_writer_wait
;
1043 wait_queue_head_t log_commit_wait
[2];
1044 atomic_t log_writers
;
1045 atomic_t log_commit
[2];
1046 unsigned long log_transid
;
1047 unsigned long last_log_commit
;
1048 unsigned long log_batch
;
1049 pid_t log_start_pid
;
1050 bool log_multiple_pids
;
1055 /* data allocations are done in sectorsize units */
1058 /* node allocations are done in nodesize units */
1061 /* leaf allocations are done in leafsize units */
1068 u64 highest_objectid
;
1073 u64 defrag_trans_start
;
1074 struct btrfs_key defrag_progress
;
1075 struct btrfs_key defrag_max
;
1080 /* the dirty list is only used by non-reference counted roots */
1081 struct list_head dirty_list
;
1083 struct list_head root_list
;
1085 spinlock_t orphan_lock
;
1086 struct list_head orphan_list
;
1087 struct btrfs_block_rsv
*orphan_block_rsv
;
1088 int orphan_item_inserted
;
1089 int orphan_cleanup_state
;
1091 spinlock_t inode_lock
;
1092 /* red-black tree that keeps track of in-memory inodes */
1093 struct rb_root inode_tree
;
1096 * right now this just gets used so that a root has its own devid
1097 * for stat. It may be used for more later
1099 struct super_block anon_super
;
1103 * inode items have the data typically returned from stat and store other
1104 * info about object characteristics. There is one for every file and dir in
1107 #define BTRFS_INODE_ITEM_KEY 1
1108 #define BTRFS_INODE_REF_KEY 12
1109 #define BTRFS_XATTR_ITEM_KEY 24
1110 #define BTRFS_ORPHAN_ITEM_KEY 48
1111 /* reserve 2-15 close to the inode for later flexibility */
1114 * dir items are the name -> inode pointers in a directory. There is one
1115 * for every name in a directory.
1117 #define BTRFS_DIR_LOG_ITEM_KEY 60
1118 #define BTRFS_DIR_LOG_INDEX_KEY 72
1119 #define BTRFS_DIR_ITEM_KEY 84
1120 #define BTRFS_DIR_INDEX_KEY 96
1122 * extent data is for file data
1124 #define BTRFS_EXTENT_DATA_KEY 108
1127 * extent csums are stored in a separate tree and hold csums for
1128 * an entire extent on disk.
1130 #define BTRFS_EXTENT_CSUM_KEY 128
1133 * root items point to tree roots. They are typically in the root
1134 * tree used by the super block to find all the other trees
1136 #define BTRFS_ROOT_ITEM_KEY 132
1139 * root backrefs tie subvols and snapshots to the directory entries that
1142 #define BTRFS_ROOT_BACKREF_KEY 144
1145 * root refs make a fast index for listing all of the snapshots and
1146 * subvolumes referenced by a given root. They point directly to the
1147 * directory item in the root that references the subvol
1149 #define BTRFS_ROOT_REF_KEY 156
1152 * extent items are in the extent map tree. These record which blocks
1153 * are used, and how many references there are to each block
1155 #define BTRFS_EXTENT_ITEM_KEY 168
1157 #define BTRFS_TREE_BLOCK_REF_KEY 176
1159 #define BTRFS_EXTENT_DATA_REF_KEY 178
1161 #define BTRFS_EXTENT_REF_V0_KEY 180
1163 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1165 #define BTRFS_SHARED_DATA_REF_KEY 184
1168 * block groups give us hints into the extent allocation trees. Which
1169 * blocks are free etc etc
1171 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1173 #define BTRFS_DEV_EXTENT_KEY 204
1174 #define BTRFS_DEV_ITEM_KEY 216
1175 #define BTRFS_CHUNK_ITEM_KEY 228
1178 * string items are for debugging. They just store a short string of
1181 #define BTRFS_STRING_ITEM_KEY 253
1183 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1184 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1185 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1186 #define BTRFS_MOUNT_SSD (1 << 3)
1187 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1188 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1189 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1190 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1191 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1192 #define BTRFS_MOUNT_NOSSD (1 << 9)
1193 #define BTRFS_MOUNT_DISCARD (1 << 10)
1194 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1196 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1197 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1198 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1203 #define BTRFS_INODE_NODATASUM (1 << 0)
1204 #define BTRFS_INODE_NODATACOW (1 << 1)
1205 #define BTRFS_INODE_READONLY (1 << 2)
1206 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1207 #define BTRFS_INODE_PREALLOC (1 << 4)
1208 #define BTRFS_INODE_SYNC (1 << 5)
1209 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1210 #define BTRFS_INODE_APPEND (1 << 7)
1211 #define BTRFS_INODE_NODUMP (1 << 8)
1212 #define BTRFS_INODE_NOATIME (1 << 9)
1213 #define BTRFS_INODE_DIRSYNC (1 << 10)
1215 /* some macros to generate set/get funcs for the struct fields. This
1216 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1219 #define le8_to_cpu(v) (v)
1220 #define cpu_to_le8(v) (v)
1223 #define read_eb_member(eb, ptr, type, member, result) ( \
1224 read_extent_buffer(eb, (char *)(result), \
1225 ((unsigned long)(ptr)) + \
1226 offsetof(type, member), \
1227 sizeof(((type *)0)->member)))
1229 #define write_eb_member(eb, ptr, type, member, result) ( \
1230 write_extent_buffer(eb, (char *)(result), \
1231 ((unsigned long)(ptr)) + \
1232 offsetof(type, member), \
1233 sizeof(((type *)0)->member)))
1235 #ifndef BTRFS_SETGET_FUNCS
1236 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1237 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1238 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1241 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1242 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1244 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1245 u##bits res = le##bits##_to_cpu(p->member); \
1246 kunmap_atomic(p, KM_USER0); \
1249 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1252 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1253 p->member = cpu_to_le##bits(val); \
1254 kunmap_atomic(p, KM_USER0); \
1257 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1258 static inline u##bits btrfs_##name(type *s) \
1260 return le##bits##_to_cpu(s->member); \
1262 static inline void btrfs_set_##name(type *s, u##bits val) \
1264 s->member = cpu_to_le##bits(val); \
1267 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1268 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1269 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1270 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1271 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1272 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1274 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1275 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1276 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1277 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1278 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1279 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1281 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1282 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1284 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1286 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1288 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1290 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1292 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1293 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1295 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1297 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1299 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1302 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1304 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1307 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1309 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1312 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1313 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1314 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1315 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1316 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1317 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1318 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1319 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1320 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1321 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1322 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1324 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1326 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1329 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1330 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1331 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1333 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1335 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1337 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1339 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1340 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1342 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1344 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1345 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1347 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1350 unsigned long offset
= (unsigned long)c
;
1351 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1352 offset
+= nr
* sizeof(struct btrfs_stripe
);
1353 return (struct btrfs_stripe
*)offset
;
1356 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1358 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1361 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1362 struct btrfs_chunk
*c
, int nr
)
1364 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1367 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1368 struct btrfs_chunk
*c
, int nr
,
1371 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1374 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1375 struct btrfs_chunk
*c
, int nr
)
1377 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1380 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1381 struct btrfs_chunk
*c
, int nr
,
1384 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1387 /* struct btrfs_block_group_item */
1388 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1390 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1392 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1393 struct btrfs_block_group_item
, chunk_objectid
, 64);
1395 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1396 struct btrfs_block_group_item
, chunk_objectid
, 64);
1397 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1398 struct btrfs_block_group_item
, flags
, 64);
1399 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1400 struct btrfs_block_group_item
, flags
, 64);
1402 /* struct btrfs_inode_ref */
1403 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1404 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1406 /* struct btrfs_inode_item */
1407 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1408 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1409 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1410 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1411 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1412 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1413 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1414 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1415 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1416 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1417 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1418 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1420 static inline struct btrfs_timespec
*
1421 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1423 unsigned long ptr
= (unsigned long)inode_item
;
1424 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1425 return (struct btrfs_timespec
*)ptr
;
1428 static inline struct btrfs_timespec
*
1429 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1431 unsigned long ptr
= (unsigned long)inode_item
;
1432 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1433 return (struct btrfs_timespec
*)ptr
;
1436 static inline struct btrfs_timespec
*
1437 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1439 unsigned long ptr
= (unsigned long)inode_item
;
1440 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1441 return (struct btrfs_timespec
*)ptr
;
1444 static inline struct btrfs_timespec
*
1445 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1447 unsigned long ptr
= (unsigned long)inode_item
;
1448 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1449 return (struct btrfs_timespec
*)ptr
;
1452 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1453 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1455 /* struct btrfs_dev_extent */
1456 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1458 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1459 chunk_objectid
, 64);
1460 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1462 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1464 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1466 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1467 return (u8
*)((unsigned long)dev
+ ptr
);
1470 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1471 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1473 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1475 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1478 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1480 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1481 struct btrfs_tree_block_info
*item
,
1482 struct btrfs_disk_key
*key
)
1484 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1487 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1488 struct btrfs_tree_block_info
*item
,
1489 struct btrfs_disk_key
*key
)
1491 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1494 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1496 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1498 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1500 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1503 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1506 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1508 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1511 static inline u32
btrfs_extent_inline_ref_size(int type
)
1513 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1514 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1515 return sizeof(struct btrfs_extent_inline_ref
);
1516 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1517 return sizeof(struct btrfs_shared_data_ref
) +
1518 sizeof(struct btrfs_extent_inline_ref
);
1519 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1520 return sizeof(struct btrfs_extent_data_ref
) +
1521 offsetof(struct btrfs_extent_inline_ref
, offset
);
1526 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1527 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1529 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1530 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1532 /* struct btrfs_node */
1533 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1534 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1536 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1539 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1540 sizeof(struct btrfs_key_ptr
) * nr
;
1541 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1544 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1548 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1549 sizeof(struct btrfs_key_ptr
) * nr
;
1550 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1553 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1556 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1557 sizeof(struct btrfs_key_ptr
) * nr
;
1558 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1561 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1565 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1566 sizeof(struct btrfs_key_ptr
) * nr
;
1567 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1570 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1572 return offsetof(struct btrfs_node
, ptrs
) +
1573 sizeof(struct btrfs_key_ptr
) * nr
;
1576 void btrfs_node_key(struct extent_buffer
*eb
,
1577 struct btrfs_disk_key
*disk_key
, int nr
);
1579 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1580 struct btrfs_disk_key
*disk_key
, int nr
)
1583 ptr
= btrfs_node_key_ptr_offset(nr
);
1584 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1585 struct btrfs_key_ptr
, key
, disk_key
);
1588 /* struct btrfs_item */
1589 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1590 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1592 static inline unsigned long btrfs_item_nr_offset(int nr
)
1594 return offsetof(struct btrfs_leaf
, items
) +
1595 sizeof(struct btrfs_item
) * nr
;
1598 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1601 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1604 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1605 struct btrfs_item
*item
)
1607 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1610 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1612 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1615 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1617 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1620 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1622 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1625 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1626 struct btrfs_disk_key
*disk_key
, int nr
)
1628 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1629 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1632 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1633 struct btrfs_disk_key
*disk_key
, int nr
)
1635 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1636 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1639 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1642 * struct btrfs_root_ref
1644 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1645 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1646 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1648 /* struct btrfs_dir_item */
1649 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1650 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1651 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1652 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1654 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1655 struct btrfs_dir_item
*item
,
1656 struct btrfs_disk_key
*key
)
1658 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1661 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1662 struct btrfs_dir_item
*item
,
1663 struct btrfs_disk_key
*key
)
1665 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1668 /* struct btrfs_disk_key */
1669 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1671 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1672 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1674 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1675 struct btrfs_disk_key
*disk
)
1677 cpu
->offset
= le64_to_cpu(disk
->offset
);
1678 cpu
->type
= disk
->type
;
1679 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1682 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1683 struct btrfs_key
*cpu
)
1685 disk
->offset
= cpu_to_le64(cpu
->offset
);
1686 disk
->type
= cpu
->type
;
1687 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1690 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1691 struct btrfs_key
*key
, int nr
)
1693 struct btrfs_disk_key disk_key
;
1694 btrfs_node_key(eb
, &disk_key
, nr
);
1695 btrfs_disk_key_to_cpu(key
, &disk_key
);
1698 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1699 struct btrfs_key
*key
, int nr
)
1701 struct btrfs_disk_key disk_key
;
1702 btrfs_item_key(eb
, &disk_key
, nr
);
1703 btrfs_disk_key_to_cpu(key
, &disk_key
);
1706 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1707 struct btrfs_dir_item
*item
,
1708 struct btrfs_key
*key
)
1710 struct btrfs_disk_key disk_key
;
1711 btrfs_dir_item_key(eb
, item
, &disk_key
);
1712 btrfs_disk_key_to_cpu(key
, &disk_key
);
1716 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1721 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1726 /* struct btrfs_header */
1727 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1728 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1730 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1731 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1732 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1733 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1735 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1737 return (btrfs_header_flags(eb
) & flag
) == flag
;
1740 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1742 u64 flags
= btrfs_header_flags(eb
);
1743 btrfs_set_header_flags(eb
, flags
| flag
);
1744 return (flags
& flag
) == flag
;
1747 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1749 u64 flags
= btrfs_header_flags(eb
);
1750 btrfs_set_header_flags(eb
, flags
& ~flag
);
1751 return (flags
& flag
) == flag
;
1754 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1756 u64 flags
= btrfs_header_flags(eb
);
1757 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1760 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1763 u64 flags
= btrfs_header_flags(eb
);
1764 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1765 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1766 btrfs_set_header_flags(eb
, flags
);
1769 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1771 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1775 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1777 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1781 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1783 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1787 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1789 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1793 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1798 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1803 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1808 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1810 return btrfs_header_level(eb
) == 0;
1813 /* struct btrfs_root_item */
1814 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1816 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1817 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1818 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1820 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1822 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1823 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1824 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1825 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1826 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1827 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1828 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1829 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1832 /* struct btrfs_super_block */
1834 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1835 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1836 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1838 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1839 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1840 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1841 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1842 struct btrfs_super_block
, chunk_root_generation
, 64);
1843 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1845 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1847 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1848 chunk_root_level
, 8);
1849 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1851 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1852 log_root_transid
, 64);
1853 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1855 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1857 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1859 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1861 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1863 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1865 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1867 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1868 root_dir_objectid
, 64);
1869 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1871 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1873 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1874 compat_ro_flags
, 64);
1875 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1876 incompat_flags
, 64);
1877 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1880 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1882 int t
= btrfs_super_csum_type(s
);
1883 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1884 return btrfs_csum_sizes
[t
];
1887 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1889 return offsetof(struct btrfs_leaf
, items
);
1892 /* struct btrfs_file_extent_item */
1893 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1895 static inline unsigned long
1896 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
1898 unsigned long offset
= (unsigned long)e
;
1899 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1903 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1905 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1908 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1910 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1912 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1913 disk_num_bytes
, 64);
1914 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1916 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1918 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1920 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1922 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1924 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1925 other_encoding
, 16);
1927 /* this returns the number of file bytes represented by the inline item.
1928 * If an item is compressed, this is the uncompressed size
1930 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1931 struct btrfs_file_extent_item
*e
)
1933 return btrfs_file_extent_ram_bytes(eb
, e
);
1937 * this returns the number of bytes used by the item on disk, minus the
1938 * size of any extent headers. If a file is compressed on disk, this is
1939 * the compressed size
1941 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1942 struct btrfs_item
*e
)
1944 unsigned long offset
;
1945 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1946 return btrfs_item_size(eb
, e
) - offset
;
1949 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1951 return sb
->s_fs_info
;
1954 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1955 const char *name
, int len
)
1957 /* if we already have a name just free it */
1960 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1964 memcpy(root
->name
, name
, len
);
1965 root
->name
[len
] = '\0';
1970 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
1973 return root
->leafsize
;
1974 return root
->nodesize
;
1977 /* helper function to cast into the data area of the leaf. */
1978 #define btrfs_item_ptr(leaf, slot, type) \
1979 ((type *)(btrfs_leaf_data(leaf) + \
1980 btrfs_item_offset_nr(leaf, slot)))
1982 #define btrfs_item_ptr_offset(leaf, slot) \
1983 ((unsigned long)(btrfs_leaf_data(leaf) + \
1984 btrfs_item_offset_nr(leaf, slot)))
1986 static inline struct dentry
*fdentry(struct file
*file
)
1988 return file
->f_path
.dentry
;
1992 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
1993 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
1994 struct btrfs_root
*root
, unsigned long count
);
1995 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1996 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
1997 struct btrfs_root
*root
, u64 bytenr
,
1998 u64 num_bytes
, u64
*refs
, u64
*flags
);
1999 int btrfs_pin_extent(struct btrfs_root
*root
,
2000 u64 bytenr
, u64 num
, int reserved
);
2001 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
2002 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2003 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2004 struct btrfs_root
*root
,
2005 u64 objectid
, u64 offset
, u64 bytenr
);
2006 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
2007 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2008 struct btrfs_fs_info
*info
,
2010 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2011 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2012 u64 search_start
, u64 search_hint
, int owner
);
2013 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2014 struct btrfs_root
*root
, u32 blocksize
,
2015 u64 parent
, u64 root_objectid
,
2016 struct btrfs_disk_key
*key
, int level
,
2017 u64 hint
, u64 empty_size
);
2018 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2019 struct btrfs_root
*root
,
2020 struct extent_buffer
*buf
,
2021 u64 parent
, int last_ref
);
2022 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2023 struct btrfs_root
*root
,
2024 u64 bytenr
, u32 blocksize
,
2026 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2027 struct btrfs_root
*root
,
2028 u64 root_objectid
, u64 owner
,
2029 u64 offset
, struct btrfs_key
*ins
);
2030 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2031 struct btrfs_root
*root
,
2032 u64 root_objectid
, u64 owner
, u64 offset
,
2033 struct btrfs_key
*ins
);
2034 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2035 struct btrfs_root
*root
,
2036 u64 num_bytes
, u64 min_alloc_size
,
2037 u64 empty_size
, u64 hint_byte
,
2038 u64 search_end
, struct btrfs_key
*ins
,
2040 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2041 struct extent_buffer
*buf
, int full_backref
);
2042 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2043 struct extent_buffer
*buf
, int full_backref
);
2044 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2045 struct btrfs_root
*root
,
2046 u64 bytenr
, u64 num_bytes
, u64 flags
,
2048 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2049 struct btrfs_root
*root
,
2050 u64 bytenr
, u64 num_bytes
, u64 parent
,
2051 u64 root_objectid
, u64 owner
, u64 offset
);
2053 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2054 int btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2055 struct btrfs_root
*root
);
2056 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2057 struct btrfs_root
*root
);
2058 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2059 struct btrfs_root
*root
,
2060 u64 bytenr
, u64 num_bytes
, u64 parent
,
2061 u64 root_objectid
, u64 owner
, u64 offset
);
2063 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2064 struct btrfs_root
*root
);
2065 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2066 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2067 int btrfs_read_block_groups(struct btrfs_root
*root
);
2068 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2069 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2070 struct btrfs_root
*root
, u64 bytes_used
,
2071 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2073 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2074 struct btrfs_root
*root
, u64 group_start
);
2075 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2076 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2077 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2078 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
2079 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
2080 int btrfs_trans_reserve_metadata(struct btrfs_trans_handle
*trans
,
2081 struct btrfs_root
*root
,
2082 int num_items
, int *retries
);
2083 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2084 struct btrfs_root
*root
);
2085 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2086 struct inode
*inode
);
2087 void btrfs_orphan_release_metadata(struct inode
*inode
);
2088 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
2089 struct btrfs_pending_snapshot
*pending
);
2090 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2091 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2092 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
2093 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
2094 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2095 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2096 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2097 struct btrfs_block_rsv
*rsv
);
2098 void btrfs_add_durable_block_rsv(struct btrfs_fs_info
*fs_info
,
2099 struct btrfs_block_rsv
*rsv
);
2100 int btrfs_block_rsv_add(struct btrfs_trans_handle
*trans
,
2101 struct btrfs_root
*root
,
2102 struct btrfs_block_rsv
*block_rsv
,
2103 u64 num_bytes
, int *retries
);
2104 int btrfs_block_rsv_check(struct btrfs_trans_handle
*trans
,
2105 struct btrfs_root
*root
,
2106 struct btrfs_block_rsv
*block_rsv
,
2107 u64 min_reserved
, int min_factor
);
2108 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2109 struct btrfs_block_rsv
*dst_rsv
,
2111 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2112 struct btrfs_block_rsv
*block_rsv
,
2114 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2115 struct btrfs_block_group_cache
*cache
);
2116 int btrfs_set_block_group_rw(struct btrfs_root
*root
,
2117 struct btrfs_block_group_cache
*cache
);
2119 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2120 int level
, int *slot
);
2121 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2122 int btrfs_previous_item(struct btrfs_root
*root
,
2123 struct btrfs_path
*path
, u64 min_objectid
,
2125 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2126 struct btrfs_root
*root
, struct btrfs_path
*path
,
2127 struct btrfs_key
*new_key
);
2128 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2129 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2130 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2131 struct btrfs_key
*key
, int lowest_level
,
2132 int cache_only
, u64 min_trans
);
2133 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2134 struct btrfs_key
*max_key
,
2135 struct btrfs_path
*path
, int cache_only
,
2137 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2138 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2139 struct extent_buffer
*parent
, int parent_slot
,
2140 struct extent_buffer
**cow_ret
);
2141 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2142 struct btrfs_root
*root
,
2143 struct extent_buffer
*buf
,
2144 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2145 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2146 struct extent_buffer
*buf
);
2147 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2148 *root
, struct btrfs_path
*path
, u32 data_size
);
2149 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2150 struct btrfs_root
*root
,
2151 struct btrfs_path
*path
,
2152 u32 new_size
, int from_end
);
2153 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2154 struct btrfs_root
*root
,
2155 struct btrfs_path
*path
,
2156 struct btrfs_key
*new_key
,
2157 unsigned long split_offset
);
2158 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2159 struct btrfs_root
*root
,
2160 struct btrfs_path
*path
,
2161 struct btrfs_key
*new_key
);
2162 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2163 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2165 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2166 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2167 int start_slot
, int cache_only
, u64
*last_ret
,
2168 struct btrfs_key
*progress
);
2169 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
2170 struct btrfs_path
*btrfs_alloc_path(void);
2171 void btrfs_free_path(struct btrfs_path
*p
);
2172 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2173 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2175 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2176 struct btrfs_path
*path
, int slot
, int nr
);
2177 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2178 struct btrfs_root
*root
,
2179 struct btrfs_path
*path
)
2181 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2184 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2185 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2186 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
2187 struct btrfs_root
*root
,
2188 struct btrfs_path
*path
,
2189 struct btrfs_key
*cpu_key
, u32
*data_size
,
2191 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2192 struct btrfs_root
*root
,
2193 struct btrfs_path
*path
,
2194 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2196 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2197 struct btrfs_root
*root
,
2198 struct btrfs_path
*path
,
2199 struct btrfs_key
*key
,
2202 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2205 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2206 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2207 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2208 int btrfs_drop_snapshot(struct btrfs_root
*root
, int update_ref
);
2209 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2210 struct btrfs_root
*root
,
2211 struct extent_buffer
*node
,
2212 struct extent_buffer
*parent
);
2214 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2215 struct btrfs_path
*path
,
2216 u64 root_id
, u64 ref_id
);
2217 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2218 struct btrfs_root
*tree_root
,
2219 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2220 const char *name
, int name_len
);
2221 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2222 struct btrfs_root
*tree_root
,
2223 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2224 const char *name
, int name_len
);
2225 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2226 struct btrfs_key
*key
);
2227 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2228 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2230 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2231 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2233 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2234 btrfs_root_item
*item
, struct btrfs_key
*key
);
2235 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
2236 u64
*found_objectid
);
2237 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2238 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2239 int btrfs_set_root_node(struct btrfs_root_item
*item
,
2240 struct extent_buffer
*node
);
2242 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2243 struct btrfs_root
*root
, const char *name
,
2244 int name_len
, u64 dir
,
2245 struct btrfs_key
*location
, u8 type
, u64 index
);
2246 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2247 struct btrfs_root
*root
,
2248 struct btrfs_path
*path
, u64 dir
,
2249 const char *name
, int name_len
,
2251 struct btrfs_dir_item
*
2252 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2253 struct btrfs_root
*root
,
2254 struct btrfs_path
*path
, u64 dir
,
2255 u64 objectid
, const char *name
, int name_len
,
2257 struct btrfs_dir_item
*
2258 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2259 struct btrfs_path
*path
, u64 dirid
,
2260 const char *name
, int name_len
);
2261 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2262 struct btrfs_path
*path
,
2263 const char *name
, int name_len
);
2264 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2265 struct btrfs_root
*root
,
2266 struct btrfs_path
*path
,
2267 struct btrfs_dir_item
*di
);
2268 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2269 struct btrfs_root
*root
,
2270 struct btrfs_path
*path
, u64 objectid
,
2271 const char *name
, u16 name_len
,
2272 const void *data
, u16 data_len
);
2273 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2274 struct btrfs_root
*root
,
2275 struct btrfs_path
*path
, u64 dir
,
2276 const char *name
, u16 name_len
,
2280 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2281 struct btrfs_root
*root
, u64 offset
);
2282 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2283 struct btrfs_root
*root
, u64 offset
);
2284 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2287 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2288 struct btrfs_root
*fs_root
,
2289 u64 dirid
, u64
*objectid
);
2290 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2293 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2294 struct btrfs_root
*root
,
2295 const char *name
, int name_len
,
2296 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2297 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2298 struct btrfs_root
*root
,
2299 const char *name
, int name_len
,
2300 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2301 struct btrfs_inode_ref
*
2302 btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2303 struct btrfs_root
*root
,
2304 struct btrfs_path
*path
,
2305 const char *name
, int name_len
,
2306 u64 inode_objectid
, u64 ref_objectid
, int mod
);
2307 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2308 struct btrfs_root
*root
,
2309 struct btrfs_path
*path
, u64 objectid
);
2310 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2311 *root
, struct btrfs_path
*path
,
2312 struct btrfs_key
*location
, int mod
);
2315 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2316 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2317 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2318 struct bio
*bio
, u32
*dst
);
2319 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2320 struct btrfs_root
*root
,
2321 u64 objectid
, u64 pos
,
2322 u64 disk_offset
, u64 disk_num_bytes
,
2323 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2324 u8 compression
, u8 encryption
, u16 other_encoding
);
2325 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2326 struct btrfs_root
*root
,
2327 struct btrfs_path
*path
, u64 objectid
,
2328 u64 bytenr
, int mod
);
2329 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2330 struct btrfs_root
*root
,
2331 struct btrfs_ordered_sum
*sums
);
2332 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2333 struct bio
*bio
, u64 file_start
, int contig
);
2334 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
2335 u64 start
, unsigned long len
);
2336 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2337 struct btrfs_root
*root
,
2338 struct btrfs_path
*path
,
2339 u64 bytenr
, int cow
);
2340 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2341 struct btrfs_root
*root
, struct btrfs_path
*path
,
2343 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
2344 u64 end
, struct list_head
*list
);
2347 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2348 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2349 #define ClearPageChecked ClearPageFsMisc
2350 #define SetPageChecked SetPageFsMisc
2351 #define PageChecked PageFsMisc
2354 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2355 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2356 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2357 struct btrfs_root
*root
,
2358 struct inode
*dir
, struct inode
*inode
,
2359 const char *name
, int name_len
);
2360 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2361 struct inode
*parent_inode
, struct inode
*inode
,
2362 const char *name
, int name_len
, int add_backref
, u64 index
);
2363 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2364 struct btrfs_root
*root
,
2365 struct inode
*dir
, u64 objectid
,
2366 const char *name
, int name_len
);
2367 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2368 struct btrfs_root
*root
,
2369 struct inode
*inode
, u64 new_size
,
2372 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2373 int btrfs_start_one_delalloc_inode(struct btrfs_root
*root
, int delay_iput
);
2374 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
2375 struct extent_state
**cached_state
);
2376 int btrfs_writepages(struct address_space
*mapping
,
2377 struct writeback_control
*wbc
);
2378 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2379 struct btrfs_root
*new_root
,
2380 u64 new_dirid
, u64 alloc_hint
);
2381 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2382 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2384 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2385 struct file_ra_state
*ra
, struct file
*file
,
2386 pgoff_t offset
, pgoff_t last_index
);
2387 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2388 int btrfs_readpage(struct file
*file
, struct page
*page
);
2389 void btrfs_delete_inode(struct inode
*inode
);
2390 void btrfs_put_inode(struct inode
*inode
);
2391 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
2392 void btrfs_dirty_inode(struct inode
*inode
);
2393 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2394 void btrfs_destroy_inode(struct inode
*inode
);
2395 void btrfs_drop_inode(struct inode
*inode
);
2396 int btrfs_init_cachep(void);
2397 void btrfs_destroy_cachep(void);
2398 long btrfs_ioctl_trans_end(struct file
*file
);
2399 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2400 struct btrfs_root
*root
, int *was_new
);
2401 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2402 unsigned from
, unsigned to
);
2403 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2404 size_t page_offset
, u64 start
, u64 end
,
2406 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2407 struct btrfs_root
*root
,
2408 struct inode
*inode
);
2409 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2410 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2411 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
2412 void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle
*trans
,
2413 struct btrfs_pending_snapshot
*pending
,
2414 u64
*bytes_to_reserve
);
2415 void btrfs_orphan_post_snapshot(struct btrfs_trans_handle
*trans
,
2416 struct btrfs_pending_snapshot
*pending
);
2417 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
2418 struct btrfs_root
*root
);
2419 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
2420 int btrfs_invalidate_inodes(struct btrfs_root
*root
);
2421 void btrfs_add_delayed_iput(struct inode
*inode
);
2422 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
2423 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
2424 u64 start
, u64 num_bytes
, u64 min_size
,
2425 loff_t actual_len
, u64
*alloc_hint
);
2426 extern const struct dentry_operations btrfs_dentry_operations
;
2429 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2430 void btrfs_update_iflags(struct inode
*inode
);
2431 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2434 int btrfs_sync_file(struct file
*file
, struct dentry
*dentry
, int datasync
);
2435 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2437 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2438 extern const struct file_operations btrfs_file_operations
;
2439 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
2440 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
2441 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2442 struct inode
*inode
, u64 start
, u64 end
);
2443 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2446 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2447 struct btrfs_root
*root
, int cache_only
);
2450 int btrfs_init_sysfs(void);
2451 void btrfs_exit_sysfs(void);
2452 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2453 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2454 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2455 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2458 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2461 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2462 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2465 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2466 int btrfs_check_acl(struct inode
*inode
, int mask
);
2468 #define btrfs_check_acl NULL
2470 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2471 struct inode
*inode
, struct inode
*dir
);
2472 int btrfs_acl_chmod(struct inode
*inode
);
2475 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
2476 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
2477 struct btrfs_root
*root
);
2478 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
2479 struct btrfs_root
*root
);
2480 int btrfs_recover_relocation(struct btrfs_root
*root
);
2481 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);