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 this doesn't take mirrors into account */
680 u64 bytes_used
; /* total bytes used,
681 this does't take mirrors into account */
682 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
683 transaction finishes */
684 u64 bytes_reserved
; /* total bytes the allocator has reserved for
685 current allocations */
686 u64 bytes_readonly
; /* total bytes that are read only */
688 u64 bytes_may_use
; /* number of bytes that may be used for
689 delalloc/allocations */
690 u64 disk_used
; /* total bytes used on disk */
691 u64 disk_total
; /* total bytes on disk, takes mirrors into
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
699 struct list_head list
;
701 /* for block groups in our same type */
702 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
704 struct rw_semaphore groups_sem
;
705 atomic_t caching_threads
;
708 struct btrfs_block_rsv
{
712 struct btrfs_space_info
*space_info
;
713 struct list_head list
;
716 unsigned int priority
:8;
717 unsigned int durable
:1;
718 unsigned int refill_used
:1;
723 * free clusters are used to claim free space in relatively large chunks,
724 * allowing us to do less seeky writes. They are used for all metadata
725 * allocations and data allocations in ssd mode.
727 struct btrfs_free_cluster
{
729 spinlock_t refill_lock
;
732 /* largest extent in this cluster */
735 /* first extent starting offset */
738 /* if this cluster simply points at a bitmap in the block group */
739 bool points_to_bitmap
;
741 struct btrfs_block_group_cache
*block_group
;
743 * when a cluster is allocated from a block group, we put the
744 * cluster onto a list in the block group so that it can
745 * be freed before the block group is freed.
747 struct list_head block_group_list
;
750 enum btrfs_caching_type
{
752 BTRFS_CACHE_STARTED
= 1,
753 BTRFS_CACHE_FINISHED
= 2,
756 struct btrfs_caching_control
{
757 struct list_head list
;
759 wait_queue_head_t wait
;
760 struct btrfs_block_group_cache
*block_group
;
765 struct btrfs_block_group_cache
{
766 struct btrfs_key key
;
767 struct btrfs_block_group_item item
;
768 struct btrfs_fs_info
*fs_info
;
782 /* cache tracking stuff */
784 struct btrfs_caching_control
*caching_ctl
;
785 u64 last_byte_to_unpin
;
787 struct btrfs_space_info
*space_info
;
789 /* free space cache stuff */
790 spinlock_t tree_lock
;
791 struct rb_root free_space_offset
;
794 /* block group cache stuff */
795 struct rb_node cache_node
;
797 /* for block groups in the same raid type */
798 struct list_head list
;
803 /* List of struct btrfs_free_clusters for this block group.
804 * Today it will only have one thing on it, but that may change
806 struct list_head cluster_list
;
809 struct reloc_control
;
811 struct btrfs_fs_devices
;
812 struct btrfs_fs_info
{
813 u8 fsid
[BTRFS_FSID_SIZE
];
814 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
815 struct btrfs_root
*extent_root
;
816 struct btrfs_root
*tree_root
;
817 struct btrfs_root
*chunk_root
;
818 struct btrfs_root
*dev_root
;
819 struct btrfs_root
*fs_root
;
820 struct btrfs_root
*csum_root
;
822 /* the log root tree is a directory of all the other log roots */
823 struct btrfs_root
*log_root_tree
;
825 spinlock_t fs_roots_radix_lock
;
826 struct radix_tree_root fs_roots_radix
;
828 /* block group cache stuff */
829 spinlock_t block_group_cache_lock
;
830 struct rb_root block_group_cache_tree
;
832 struct extent_io_tree freed_extents
[2];
833 struct extent_io_tree
*pinned_extents
;
835 /* logical->physical extent mapping */
836 struct btrfs_mapping_tree mapping_tree
;
838 /* block reservation for extent, checksum and root tree */
839 struct btrfs_block_rsv global_block_rsv
;
840 /* block reservation for delay allocation */
841 struct btrfs_block_rsv delalloc_block_rsv
;
842 /* block reservation for metadata operations */
843 struct btrfs_block_rsv trans_block_rsv
;
844 /* block reservation for chunk tree */
845 struct btrfs_block_rsv chunk_block_rsv
;
847 struct btrfs_block_rsv empty_block_rsv
;
849 /* list of block reservations that cross multiple transactions */
850 struct list_head durable_block_rsv_list
;
852 struct mutex durable_block_rsv_mutex
;
855 u64 last_trans_committed
;
858 * this is updated to the current trans every time a full commit
859 * is required instead of the faster short fsync log commits
861 u64 last_trans_log_full_commit
;
862 u64 open_ioctl_trans
;
863 unsigned long mount_opt
;
866 struct btrfs_transaction
*running_transaction
;
867 wait_queue_head_t transaction_throttle
;
868 wait_queue_head_t transaction_wait
;
869 wait_queue_head_t async_submit_wait
;
871 struct btrfs_super_block super_copy
;
872 struct btrfs_super_block super_for_commit
;
873 struct block_device
*__bdev
;
874 struct super_block
*sb
;
875 struct inode
*btree_inode
;
876 struct backing_dev_info bdi
;
877 struct mutex trans_mutex
;
878 struct mutex tree_log_mutex
;
879 struct mutex transaction_kthread_mutex
;
880 struct mutex cleaner_mutex
;
881 struct mutex chunk_mutex
;
882 struct mutex volume_mutex
;
884 * this protects the ordered operations list only while we are
885 * processing all of the entries on it. This way we make
886 * sure the commit code doesn't find the list temporarily empty
887 * because another function happens to be doing non-waiting preflush
888 * before jumping into the main commit.
890 struct mutex ordered_operations_mutex
;
891 struct rw_semaphore extent_commit_sem
;
893 struct rw_semaphore cleanup_work_sem
;
895 struct rw_semaphore subvol_sem
;
896 struct srcu_struct subvol_srcu
;
898 struct list_head trans_list
;
899 struct list_head hashers
;
900 struct list_head dead_roots
;
901 struct list_head caching_block_groups
;
903 spinlock_t delayed_iput_lock
;
904 struct list_head delayed_iputs
;
906 atomic_t nr_async_submits
;
907 atomic_t async_submit_draining
;
908 atomic_t nr_async_bios
;
909 atomic_t async_delalloc_pages
;
912 * this is used by the balancing code to wait for all the pending
915 spinlock_t ordered_extent_lock
;
918 * all of the data=ordered extents pending writeback
919 * these can span multiple transactions and basically include
920 * every dirty data page that isn't from nodatacow
922 struct list_head ordered_extents
;
925 * all of the inodes that have delalloc bytes. It is possible for
926 * this list to be empty even when there is still dirty data=ordered
927 * extents waiting to finish IO.
929 struct list_head delalloc_inodes
;
932 * special rename and truncate targets that must be on disk before
933 * we're allowed to commit. This is basically the ext3 style
936 struct list_head ordered_operations
;
939 * there is a pool of worker threads for checksumming during writes
940 * and a pool for checksumming after reads. This is because readers
941 * can run with FS locks held, and the writers may be waiting for
942 * those locks. We don't want ordering in the pending list to cause
943 * deadlocks, and so the two are serviced separately.
945 * A third pool does submit_bio to avoid deadlocking with the other
948 struct btrfs_workers generic_worker
;
949 struct btrfs_workers workers
;
950 struct btrfs_workers delalloc_workers
;
951 struct btrfs_workers endio_workers
;
952 struct btrfs_workers endio_meta_workers
;
953 struct btrfs_workers endio_meta_write_workers
;
954 struct btrfs_workers endio_write_workers
;
955 struct btrfs_workers submit_workers
;
957 * fixup workers take dirty pages that didn't properly go through
958 * the cow mechanism and make them safe to write. It happens
959 * for the sys_munmap function call path
961 struct btrfs_workers fixup_workers
;
962 struct task_struct
*transaction_kthread
;
963 struct task_struct
*cleaner_kthread
;
964 int thread_pool_size
;
966 struct kobject super_kobj
;
967 struct completion kobj_unregister
;
970 int log_root_recovering
;
975 /* protected by the delalloc lock, used to keep from writing
976 * metadata until there is a nice batch
978 u64 dirty_metadata_bytes
;
979 struct list_head dirty_cowonly_roots
;
981 struct btrfs_fs_devices
*fs_devices
;
984 * the space_info list is almost entirely read only. It only changes
985 * when we add a new raid type to the FS, and that happens
986 * very rarely. RCU is used to protect it.
988 struct list_head space_info
;
990 struct reloc_control
*reloc_ctl
;
992 spinlock_t delalloc_lock
;
993 spinlock_t new_trans_lock
;
996 /* data_alloc_cluster is only used in ssd mode */
997 struct btrfs_free_cluster data_alloc_cluster
;
999 /* all metadata allocations go through this cluster */
1000 struct btrfs_free_cluster meta_alloc_cluster
;
1002 spinlock_t ref_cache_lock
;
1003 u64 total_ref_cache_size
;
1005 u64 avail_data_alloc_bits
;
1006 u64 avail_metadata_alloc_bits
;
1007 u64 avail_system_alloc_bits
;
1008 u64 data_alloc_profile
;
1009 u64 metadata_alloc_profile
;
1010 u64 system_alloc_profile
;
1012 unsigned data_chunk_allocations
;
1013 unsigned metadata_ratio
;
1019 * in ram representation of the tree. extent_root is used for all allocations
1020 * and for the extent tree extent_root root.
1023 struct extent_buffer
*node
;
1025 /* the node lock is held while changing the node pointer */
1026 spinlock_t node_lock
;
1028 struct extent_buffer
*commit_root
;
1029 struct btrfs_root
*log_root
;
1030 struct btrfs_root
*reloc_root
;
1032 struct btrfs_root_item root_item
;
1033 struct btrfs_key root_key
;
1034 struct btrfs_fs_info
*fs_info
;
1035 struct extent_io_tree dirty_log_pages
;
1037 struct kobject root_kobj
;
1038 struct completion kobj_unregister
;
1039 struct mutex objectid_mutex
;
1041 spinlock_t accounting_lock
;
1042 struct btrfs_block_rsv
*block_rsv
;
1044 struct mutex log_mutex
;
1045 wait_queue_head_t log_writer_wait
;
1046 wait_queue_head_t log_commit_wait
[2];
1047 atomic_t log_writers
;
1048 atomic_t log_commit
[2];
1049 unsigned long log_transid
;
1050 unsigned long last_log_commit
;
1051 unsigned long log_batch
;
1052 pid_t log_start_pid
;
1053 bool log_multiple_pids
;
1058 /* data allocations are done in sectorsize units */
1061 /* node allocations are done in nodesize units */
1064 /* leaf allocations are done in leafsize units */
1071 u64 highest_objectid
;
1076 u64 defrag_trans_start
;
1077 struct btrfs_key defrag_progress
;
1078 struct btrfs_key defrag_max
;
1083 /* the dirty list is only used by non-reference counted roots */
1084 struct list_head dirty_list
;
1086 struct list_head root_list
;
1088 spinlock_t orphan_lock
;
1089 struct list_head orphan_list
;
1090 struct btrfs_block_rsv
*orphan_block_rsv
;
1091 int orphan_item_inserted
;
1092 int orphan_cleanup_state
;
1094 spinlock_t inode_lock
;
1095 /* red-black tree that keeps track of in-memory inodes */
1096 struct rb_root inode_tree
;
1099 * right now this just gets used so that a root has its own devid
1100 * for stat. It may be used for more later
1102 struct super_block anon_super
;
1106 * inode items have the data typically returned from stat and store other
1107 * info about object characteristics. There is one for every file and dir in
1110 #define BTRFS_INODE_ITEM_KEY 1
1111 #define BTRFS_INODE_REF_KEY 12
1112 #define BTRFS_XATTR_ITEM_KEY 24
1113 #define BTRFS_ORPHAN_ITEM_KEY 48
1114 /* reserve 2-15 close to the inode for later flexibility */
1117 * dir items are the name -> inode pointers in a directory. There is one
1118 * for every name in a directory.
1120 #define BTRFS_DIR_LOG_ITEM_KEY 60
1121 #define BTRFS_DIR_LOG_INDEX_KEY 72
1122 #define BTRFS_DIR_ITEM_KEY 84
1123 #define BTRFS_DIR_INDEX_KEY 96
1125 * extent data is for file data
1127 #define BTRFS_EXTENT_DATA_KEY 108
1130 * extent csums are stored in a separate tree and hold csums for
1131 * an entire extent on disk.
1133 #define BTRFS_EXTENT_CSUM_KEY 128
1136 * root items point to tree roots. They are typically in the root
1137 * tree used by the super block to find all the other trees
1139 #define BTRFS_ROOT_ITEM_KEY 132
1142 * root backrefs tie subvols and snapshots to the directory entries that
1145 #define BTRFS_ROOT_BACKREF_KEY 144
1148 * root refs make a fast index for listing all of the snapshots and
1149 * subvolumes referenced by a given root. They point directly to the
1150 * directory item in the root that references the subvol
1152 #define BTRFS_ROOT_REF_KEY 156
1155 * extent items are in the extent map tree. These record which blocks
1156 * are used, and how many references there are to each block
1158 #define BTRFS_EXTENT_ITEM_KEY 168
1160 #define BTRFS_TREE_BLOCK_REF_KEY 176
1162 #define BTRFS_EXTENT_DATA_REF_KEY 178
1164 #define BTRFS_EXTENT_REF_V0_KEY 180
1166 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1168 #define BTRFS_SHARED_DATA_REF_KEY 184
1171 * block groups give us hints into the extent allocation trees. Which
1172 * blocks are free etc etc
1174 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1176 #define BTRFS_DEV_EXTENT_KEY 204
1177 #define BTRFS_DEV_ITEM_KEY 216
1178 #define BTRFS_CHUNK_ITEM_KEY 228
1181 * string items are for debugging. They just store a short string of
1184 #define BTRFS_STRING_ITEM_KEY 253
1186 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1187 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1188 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1189 #define BTRFS_MOUNT_SSD (1 << 3)
1190 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1191 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1192 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1193 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1194 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1195 #define BTRFS_MOUNT_NOSSD (1 << 9)
1196 #define BTRFS_MOUNT_DISCARD (1 << 10)
1197 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1199 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1200 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1201 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1206 #define BTRFS_INODE_NODATASUM (1 << 0)
1207 #define BTRFS_INODE_NODATACOW (1 << 1)
1208 #define BTRFS_INODE_READONLY (1 << 2)
1209 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1210 #define BTRFS_INODE_PREALLOC (1 << 4)
1211 #define BTRFS_INODE_SYNC (1 << 5)
1212 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1213 #define BTRFS_INODE_APPEND (1 << 7)
1214 #define BTRFS_INODE_NODUMP (1 << 8)
1215 #define BTRFS_INODE_NOATIME (1 << 9)
1216 #define BTRFS_INODE_DIRSYNC (1 << 10)
1218 /* some macros to generate set/get funcs for the struct fields. This
1219 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1222 #define le8_to_cpu(v) (v)
1223 #define cpu_to_le8(v) (v)
1226 #define read_eb_member(eb, ptr, type, member, result) ( \
1227 read_extent_buffer(eb, (char *)(result), \
1228 ((unsigned long)(ptr)) + \
1229 offsetof(type, member), \
1230 sizeof(((type *)0)->member)))
1232 #define write_eb_member(eb, ptr, type, member, result) ( \
1233 write_extent_buffer(eb, (char *)(result), \
1234 ((unsigned long)(ptr)) + \
1235 offsetof(type, member), \
1236 sizeof(((type *)0)->member)))
1238 #ifndef BTRFS_SETGET_FUNCS
1239 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1240 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1241 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1244 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1245 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1247 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1248 u##bits res = le##bits##_to_cpu(p->member); \
1249 kunmap_atomic(p, KM_USER0); \
1252 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1255 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1256 p->member = cpu_to_le##bits(val); \
1257 kunmap_atomic(p, KM_USER0); \
1260 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1261 static inline u##bits btrfs_##name(type *s) \
1263 return le##bits##_to_cpu(s->member); \
1265 static inline void btrfs_set_##name(type *s, u##bits val) \
1267 s->member = cpu_to_le##bits(val); \
1270 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1271 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1272 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1273 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1274 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1275 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1277 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1278 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1279 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1280 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1281 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1282 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1284 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1285 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1287 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1289 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1291 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1293 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1295 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1296 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1298 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1300 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1302 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1305 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1307 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1310 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1312 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1315 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1316 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1317 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1318 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1319 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1320 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1321 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1322 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1323 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1324 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1325 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1327 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1329 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1332 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1333 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1334 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1336 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1338 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1340 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1342 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1343 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1345 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1347 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1348 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1350 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1353 unsigned long offset
= (unsigned long)c
;
1354 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1355 offset
+= nr
* sizeof(struct btrfs_stripe
);
1356 return (struct btrfs_stripe
*)offset
;
1359 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1361 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1364 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1365 struct btrfs_chunk
*c
, int nr
)
1367 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1370 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1371 struct btrfs_chunk
*c
, int nr
,
1374 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1377 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1378 struct btrfs_chunk
*c
, int nr
)
1380 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1383 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1384 struct btrfs_chunk
*c
, int nr
,
1387 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1390 /* struct btrfs_block_group_item */
1391 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1393 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1395 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1396 struct btrfs_block_group_item
, chunk_objectid
, 64);
1398 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1399 struct btrfs_block_group_item
, chunk_objectid
, 64);
1400 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1401 struct btrfs_block_group_item
, flags
, 64);
1402 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1403 struct btrfs_block_group_item
, flags
, 64);
1405 /* struct btrfs_inode_ref */
1406 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1407 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1409 /* struct btrfs_inode_item */
1410 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1411 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1412 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1413 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1414 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1415 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1416 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1417 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1418 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1419 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1420 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1421 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1423 static inline struct btrfs_timespec
*
1424 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1426 unsigned long ptr
= (unsigned long)inode_item
;
1427 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1428 return (struct btrfs_timespec
*)ptr
;
1431 static inline struct btrfs_timespec
*
1432 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1434 unsigned long ptr
= (unsigned long)inode_item
;
1435 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1436 return (struct btrfs_timespec
*)ptr
;
1439 static inline struct btrfs_timespec
*
1440 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1442 unsigned long ptr
= (unsigned long)inode_item
;
1443 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1444 return (struct btrfs_timespec
*)ptr
;
1447 static inline struct btrfs_timespec
*
1448 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1450 unsigned long ptr
= (unsigned long)inode_item
;
1451 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1452 return (struct btrfs_timespec
*)ptr
;
1455 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1456 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1458 /* struct btrfs_dev_extent */
1459 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1461 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1462 chunk_objectid
, 64);
1463 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1465 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1467 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1469 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1470 return (u8
*)((unsigned long)dev
+ ptr
);
1473 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1474 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1476 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1478 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1481 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1483 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1484 struct btrfs_tree_block_info
*item
,
1485 struct btrfs_disk_key
*key
)
1487 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1490 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1491 struct btrfs_tree_block_info
*item
,
1492 struct btrfs_disk_key
*key
)
1494 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1497 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1499 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1501 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1503 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1506 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1509 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1511 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1514 static inline u32
btrfs_extent_inline_ref_size(int type
)
1516 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1517 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1518 return sizeof(struct btrfs_extent_inline_ref
);
1519 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1520 return sizeof(struct btrfs_shared_data_ref
) +
1521 sizeof(struct btrfs_extent_inline_ref
);
1522 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1523 return sizeof(struct btrfs_extent_data_ref
) +
1524 offsetof(struct btrfs_extent_inline_ref
, offset
);
1529 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1530 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1532 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1533 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1535 /* struct btrfs_node */
1536 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1537 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1539 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1542 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1543 sizeof(struct btrfs_key_ptr
) * nr
;
1544 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1547 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1551 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1552 sizeof(struct btrfs_key_ptr
) * nr
;
1553 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1556 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1559 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1560 sizeof(struct btrfs_key_ptr
) * nr
;
1561 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1564 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1568 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1569 sizeof(struct btrfs_key_ptr
) * nr
;
1570 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1573 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1575 return offsetof(struct btrfs_node
, ptrs
) +
1576 sizeof(struct btrfs_key_ptr
) * nr
;
1579 void btrfs_node_key(struct extent_buffer
*eb
,
1580 struct btrfs_disk_key
*disk_key
, int nr
);
1582 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1583 struct btrfs_disk_key
*disk_key
, int nr
)
1586 ptr
= btrfs_node_key_ptr_offset(nr
);
1587 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1588 struct btrfs_key_ptr
, key
, disk_key
);
1591 /* struct btrfs_item */
1592 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1593 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1595 static inline unsigned long btrfs_item_nr_offset(int nr
)
1597 return offsetof(struct btrfs_leaf
, items
) +
1598 sizeof(struct btrfs_item
) * nr
;
1601 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1604 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1607 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1608 struct btrfs_item
*item
)
1610 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1613 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1615 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1618 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1620 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1623 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1625 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1628 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1629 struct btrfs_disk_key
*disk_key
, int nr
)
1631 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1632 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1635 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1636 struct btrfs_disk_key
*disk_key
, int nr
)
1638 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1639 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1642 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1645 * struct btrfs_root_ref
1647 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1648 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1649 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1651 /* struct btrfs_dir_item */
1652 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1653 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1654 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1655 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1657 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1658 struct btrfs_dir_item
*item
,
1659 struct btrfs_disk_key
*key
)
1661 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1664 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1665 struct btrfs_dir_item
*item
,
1666 struct btrfs_disk_key
*key
)
1668 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1671 /* struct btrfs_disk_key */
1672 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1674 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1675 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1677 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1678 struct btrfs_disk_key
*disk
)
1680 cpu
->offset
= le64_to_cpu(disk
->offset
);
1681 cpu
->type
= disk
->type
;
1682 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1685 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1686 struct btrfs_key
*cpu
)
1688 disk
->offset
= cpu_to_le64(cpu
->offset
);
1689 disk
->type
= cpu
->type
;
1690 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1693 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1694 struct btrfs_key
*key
, int nr
)
1696 struct btrfs_disk_key disk_key
;
1697 btrfs_node_key(eb
, &disk_key
, nr
);
1698 btrfs_disk_key_to_cpu(key
, &disk_key
);
1701 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1702 struct btrfs_key
*key
, int nr
)
1704 struct btrfs_disk_key disk_key
;
1705 btrfs_item_key(eb
, &disk_key
, nr
);
1706 btrfs_disk_key_to_cpu(key
, &disk_key
);
1709 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1710 struct btrfs_dir_item
*item
,
1711 struct btrfs_key
*key
)
1713 struct btrfs_disk_key disk_key
;
1714 btrfs_dir_item_key(eb
, item
, &disk_key
);
1715 btrfs_disk_key_to_cpu(key
, &disk_key
);
1719 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1724 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1729 /* struct btrfs_header */
1730 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1731 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1733 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1734 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1735 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1736 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1738 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1740 return (btrfs_header_flags(eb
) & flag
) == flag
;
1743 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1745 u64 flags
= btrfs_header_flags(eb
);
1746 btrfs_set_header_flags(eb
, flags
| flag
);
1747 return (flags
& flag
) == flag
;
1750 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1752 u64 flags
= btrfs_header_flags(eb
);
1753 btrfs_set_header_flags(eb
, flags
& ~flag
);
1754 return (flags
& flag
) == flag
;
1757 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1759 u64 flags
= btrfs_header_flags(eb
);
1760 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1763 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1766 u64 flags
= btrfs_header_flags(eb
);
1767 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1768 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1769 btrfs_set_header_flags(eb
, flags
);
1772 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1774 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1778 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1780 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1784 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1786 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1790 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1792 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1796 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1801 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1806 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1811 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1813 return btrfs_header_level(eb
) == 0;
1816 /* struct btrfs_root_item */
1817 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1819 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1820 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1821 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1823 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1825 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1826 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1827 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1828 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1829 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1830 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1831 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1832 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1835 /* struct btrfs_super_block */
1837 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1838 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1839 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1841 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1842 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1843 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1844 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1845 struct btrfs_super_block
, chunk_root_generation
, 64);
1846 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1848 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1850 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1851 chunk_root_level
, 8);
1852 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1854 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1855 log_root_transid
, 64);
1856 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1858 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1860 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1862 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1864 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1866 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1868 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1870 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1871 root_dir_objectid
, 64);
1872 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1874 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1876 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1877 compat_ro_flags
, 64);
1878 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1879 incompat_flags
, 64);
1880 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1883 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1885 int t
= btrfs_super_csum_type(s
);
1886 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1887 return btrfs_csum_sizes
[t
];
1890 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1892 return offsetof(struct btrfs_leaf
, items
);
1895 /* struct btrfs_file_extent_item */
1896 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1898 static inline unsigned long
1899 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
1901 unsigned long offset
= (unsigned long)e
;
1902 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1906 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1908 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1911 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1913 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1915 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1916 disk_num_bytes
, 64);
1917 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1919 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1921 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1923 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1925 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1927 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1928 other_encoding
, 16);
1930 /* this returns the number of file bytes represented by the inline item.
1931 * If an item is compressed, this is the uncompressed size
1933 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1934 struct btrfs_file_extent_item
*e
)
1936 return btrfs_file_extent_ram_bytes(eb
, e
);
1940 * this returns the number of bytes used by the item on disk, minus the
1941 * size of any extent headers. If a file is compressed on disk, this is
1942 * the compressed size
1944 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1945 struct btrfs_item
*e
)
1947 unsigned long offset
;
1948 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1949 return btrfs_item_size(eb
, e
) - offset
;
1952 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1954 return sb
->s_fs_info
;
1957 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1958 const char *name
, int len
)
1960 /* if we already have a name just free it */
1963 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1967 memcpy(root
->name
, name
, len
);
1968 root
->name
[len
] = '\0';
1973 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
1976 return root
->leafsize
;
1977 return root
->nodesize
;
1980 /* helper function to cast into the data area of the leaf. */
1981 #define btrfs_item_ptr(leaf, slot, type) \
1982 ((type *)(btrfs_leaf_data(leaf) + \
1983 btrfs_item_offset_nr(leaf, slot)))
1985 #define btrfs_item_ptr_offset(leaf, slot) \
1986 ((unsigned long)(btrfs_leaf_data(leaf) + \
1987 btrfs_item_offset_nr(leaf, slot)))
1989 static inline struct dentry
*fdentry(struct file
*file
)
1991 return file
->f_path
.dentry
;
1995 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
1996 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
1997 struct btrfs_root
*root
, unsigned long count
);
1998 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1999 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2000 struct btrfs_root
*root
, u64 bytenr
,
2001 u64 num_bytes
, u64
*refs
, u64
*flags
);
2002 int btrfs_pin_extent(struct btrfs_root
*root
,
2003 u64 bytenr
, u64 num
, int reserved
);
2004 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
2005 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2006 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2007 struct btrfs_root
*root
,
2008 u64 objectid
, u64 offset
, u64 bytenr
);
2009 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
2010 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2011 struct btrfs_fs_info
*info
,
2013 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2014 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2015 u64 search_start
, u64 search_hint
, int owner
);
2016 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2017 struct btrfs_root
*root
, u32 blocksize
,
2018 u64 parent
, u64 root_objectid
,
2019 struct btrfs_disk_key
*key
, int level
,
2020 u64 hint
, u64 empty_size
);
2021 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2022 struct btrfs_root
*root
,
2023 struct extent_buffer
*buf
,
2024 u64 parent
, int last_ref
);
2025 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2026 struct btrfs_root
*root
,
2027 u64 bytenr
, u32 blocksize
,
2029 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2030 struct btrfs_root
*root
,
2031 u64 root_objectid
, u64 owner
,
2032 u64 offset
, struct btrfs_key
*ins
);
2033 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2034 struct btrfs_root
*root
,
2035 u64 root_objectid
, u64 owner
, u64 offset
,
2036 struct btrfs_key
*ins
);
2037 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2038 struct btrfs_root
*root
,
2039 u64 num_bytes
, u64 min_alloc_size
,
2040 u64 empty_size
, u64 hint_byte
,
2041 u64 search_end
, struct btrfs_key
*ins
,
2043 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2044 struct extent_buffer
*buf
, int full_backref
);
2045 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2046 struct extent_buffer
*buf
, int full_backref
);
2047 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2048 struct btrfs_root
*root
,
2049 u64 bytenr
, u64 num_bytes
, u64 flags
,
2051 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2052 struct btrfs_root
*root
,
2053 u64 bytenr
, u64 num_bytes
, u64 parent
,
2054 u64 root_objectid
, u64 owner
, u64 offset
);
2056 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2057 int btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2058 struct btrfs_root
*root
);
2059 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2060 struct btrfs_root
*root
);
2061 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2062 struct btrfs_root
*root
,
2063 u64 bytenr
, u64 num_bytes
, u64 parent
,
2064 u64 root_objectid
, u64 owner
, u64 offset
);
2066 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2067 struct btrfs_root
*root
);
2068 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2069 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2070 int btrfs_read_block_groups(struct btrfs_root
*root
);
2071 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2072 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2073 struct btrfs_root
*root
, u64 bytes_used
,
2074 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2076 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2077 struct btrfs_root
*root
, u64 group_start
);
2078 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2079 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2080 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2081 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
2082 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
2083 int btrfs_trans_reserve_metadata(struct btrfs_trans_handle
*trans
,
2084 struct btrfs_root
*root
,
2085 int num_items
, int *retries
);
2086 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2087 struct btrfs_root
*root
);
2088 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2089 struct inode
*inode
);
2090 void btrfs_orphan_release_metadata(struct inode
*inode
);
2091 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
2092 struct btrfs_pending_snapshot
*pending
);
2093 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2094 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2095 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
2096 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
2097 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2098 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2099 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2100 struct btrfs_block_rsv
*rsv
);
2101 void btrfs_add_durable_block_rsv(struct btrfs_fs_info
*fs_info
,
2102 struct btrfs_block_rsv
*rsv
);
2103 int btrfs_block_rsv_add(struct btrfs_trans_handle
*trans
,
2104 struct btrfs_root
*root
,
2105 struct btrfs_block_rsv
*block_rsv
,
2106 u64 num_bytes
, int *retries
);
2107 int btrfs_block_rsv_check(struct btrfs_trans_handle
*trans
,
2108 struct btrfs_root
*root
,
2109 struct btrfs_block_rsv
*block_rsv
,
2110 u64 min_reserved
, int min_factor
);
2111 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2112 struct btrfs_block_rsv
*dst_rsv
,
2114 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2115 struct btrfs_block_rsv
*block_rsv
,
2117 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2118 struct btrfs_block_group_cache
*cache
);
2119 int btrfs_set_block_group_rw(struct btrfs_root
*root
,
2120 struct btrfs_block_group_cache
*cache
);
2122 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2123 int level
, int *slot
);
2124 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2125 int btrfs_previous_item(struct btrfs_root
*root
,
2126 struct btrfs_path
*path
, u64 min_objectid
,
2128 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2129 struct btrfs_root
*root
, struct btrfs_path
*path
,
2130 struct btrfs_key
*new_key
);
2131 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2132 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2133 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2134 struct btrfs_key
*key
, int lowest_level
,
2135 int cache_only
, u64 min_trans
);
2136 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2137 struct btrfs_key
*max_key
,
2138 struct btrfs_path
*path
, int cache_only
,
2140 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2141 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2142 struct extent_buffer
*parent
, int parent_slot
,
2143 struct extent_buffer
**cow_ret
);
2144 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2145 struct btrfs_root
*root
,
2146 struct extent_buffer
*buf
,
2147 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2148 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2149 struct extent_buffer
*buf
);
2150 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2151 *root
, struct btrfs_path
*path
, u32 data_size
);
2152 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2153 struct btrfs_root
*root
,
2154 struct btrfs_path
*path
,
2155 u32 new_size
, int from_end
);
2156 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2157 struct btrfs_root
*root
,
2158 struct btrfs_path
*path
,
2159 struct btrfs_key
*new_key
,
2160 unsigned long split_offset
);
2161 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2162 struct btrfs_root
*root
,
2163 struct btrfs_path
*path
,
2164 struct btrfs_key
*new_key
);
2165 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2166 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2168 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2169 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2170 int start_slot
, int cache_only
, u64
*last_ret
,
2171 struct btrfs_key
*progress
);
2172 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
2173 struct btrfs_path
*btrfs_alloc_path(void);
2174 void btrfs_free_path(struct btrfs_path
*p
);
2175 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2176 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2178 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2179 struct btrfs_path
*path
, int slot
, int nr
);
2180 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2181 struct btrfs_root
*root
,
2182 struct btrfs_path
*path
)
2184 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2187 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2188 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2189 int btrfs_insert_some_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
,
2194 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2195 struct btrfs_root
*root
,
2196 struct btrfs_path
*path
,
2197 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2199 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2200 struct btrfs_root
*root
,
2201 struct btrfs_path
*path
,
2202 struct btrfs_key
*key
,
2205 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2208 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2209 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2210 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2211 int btrfs_drop_snapshot(struct btrfs_root
*root
,
2212 struct btrfs_block_rsv
*block_rsv
, int update_ref
);
2213 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2214 struct btrfs_root
*root
,
2215 struct extent_buffer
*node
,
2216 struct extent_buffer
*parent
);
2218 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2219 struct btrfs_path
*path
,
2220 u64 root_id
, u64 ref_id
);
2221 int btrfs_add_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_ref(struct btrfs_trans_handle
*trans
,
2226 struct btrfs_root
*tree_root
,
2227 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2228 const char *name
, int name_len
);
2229 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2230 struct btrfs_key
*key
);
2231 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2232 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2234 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2235 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2237 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2238 btrfs_root_item
*item
, struct btrfs_key
*key
);
2239 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
2240 u64
*found_objectid
);
2241 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2242 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2243 int btrfs_set_root_node(struct btrfs_root_item
*item
,
2244 struct extent_buffer
*node
);
2246 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2247 struct btrfs_root
*root
, const char *name
,
2248 int name_len
, u64 dir
,
2249 struct btrfs_key
*location
, u8 type
, u64 index
);
2250 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2251 struct btrfs_root
*root
,
2252 struct btrfs_path
*path
, u64 dir
,
2253 const char *name
, int name_len
,
2255 struct btrfs_dir_item
*
2256 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2257 struct btrfs_root
*root
,
2258 struct btrfs_path
*path
, u64 dir
,
2259 u64 objectid
, const char *name
, int name_len
,
2261 struct btrfs_dir_item
*
2262 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2263 struct btrfs_path
*path
, u64 dirid
,
2264 const char *name
, int name_len
);
2265 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2266 struct btrfs_path
*path
,
2267 const char *name
, int name_len
);
2268 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2269 struct btrfs_root
*root
,
2270 struct btrfs_path
*path
,
2271 struct btrfs_dir_item
*di
);
2272 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2273 struct btrfs_root
*root
,
2274 struct btrfs_path
*path
, u64 objectid
,
2275 const char *name
, u16 name_len
,
2276 const void *data
, u16 data_len
);
2277 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2278 struct btrfs_root
*root
,
2279 struct btrfs_path
*path
, u64 dir
,
2280 const char *name
, u16 name_len
,
2284 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2285 struct btrfs_root
*root
, u64 offset
);
2286 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2287 struct btrfs_root
*root
, u64 offset
);
2288 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2291 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2292 struct btrfs_root
*fs_root
,
2293 u64 dirid
, u64
*objectid
);
2294 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2297 int btrfs_insert_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 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2302 struct btrfs_root
*root
,
2303 const char *name
, int name_len
,
2304 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2305 struct btrfs_inode_ref
*
2306 btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2307 struct btrfs_root
*root
,
2308 struct btrfs_path
*path
,
2309 const char *name
, int name_len
,
2310 u64 inode_objectid
, u64 ref_objectid
, int mod
);
2311 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2312 struct btrfs_root
*root
,
2313 struct btrfs_path
*path
, u64 objectid
);
2314 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2315 *root
, struct btrfs_path
*path
,
2316 struct btrfs_key
*location
, int mod
);
2319 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2320 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2321 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2322 struct bio
*bio
, u32
*dst
);
2323 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
2324 struct bio
*bio
, u64 logical_offset
, u32
*dst
);
2325 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2326 struct btrfs_root
*root
,
2327 u64 objectid
, u64 pos
,
2328 u64 disk_offset
, u64 disk_num_bytes
,
2329 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2330 u8 compression
, u8 encryption
, u16 other_encoding
);
2331 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2332 struct btrfs_root
*root
,
2333 struct btrfs_path
*path
, u64 objectid
,
2334 u64 bytenr
, int mod
);
2335 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2336 struct btrfs_root
*root
,
2337 struct btrfs_ordered_sum
*sums
);
2338 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2339 struct bio
*bio
, u64 file_start
, int contig
);
2340 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
2341 u64 start
, unsigned long len
);
2342 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2343 struct btrfs_root
*root
,
2344 struct btrfs_path
*path
,
2345 u64 bytenr
, int cow
);
2346 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2347 struct btrfs_root
*root
, struct btrfs_path
*path
,
2349 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
2350 u64 end
, struct list_head
*list
);
2353 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2354 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2355 #define ClearPageChecked ClearPageFsMisc
2356 #define SetPageChecked SetPageFsMisc
2357 #define PageChecked PageFsMisc
2360 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2361 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2362 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2363 struct btrfs_root
*root
,
2364 struct inode
*dir
, struct inode
*inode
,
2365 const char *name
, int name_len
);
2366 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2367 struct inode
*parent_inode
, struct inode
*inode
,
2368 const char *name
, int name_len
, int add_backref
, u64 index
);
2369 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2370 struct btrfs_root
*root
,
2371 struct inode
*dir
, u64 objectid
,
2372 const char *name
, int name_len
);
2373 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2374 struct btrfs_root
*root
,
2375 struct inode
*inode
, u64 new_size
,
2378 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2379 int btrfs_start_one_delalloc_inode(struct btrfs_root
*root
, int delay_iput
);
2380 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
2381 struct extent_state
**cached_state
);
2382 int btrfs_writepages(struct address_space
*mapping
,
2383 struct writeback_control
*wbc
);
2384 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2385 struct btrfs_root
*new_root
,
2386 u64 new_dirid
, u64 alloc_hint
);
2387 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2388 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2390 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2391 struct file_ra_state
*ra
, struct file
*file
,
2392 pgoff_t offset
, pgoff_t last_index
);
2393 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2394 int btrfs_readpage(struct file
*file
, struct page
*page
);
2395 void btrfs_delete_inode(struct inode
*inode
);
2396 void btrfs_put_inode(struct inode
*inode
);
2397 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
2398 void btrfs_dirty_inode(struct inode
*inode
);
2399 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2400 void btrfs_destroy_inode(struct inode
*inode
);
2401 void btrfs_drop_inode(struct inode
*inode
);
2402 int btrfs_init_cachep(void);
2403 void btrfs_destroy_cachep(void);
2404 long btrfs_ioctl_trans_end(struct file
*file
);
2405 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2406 struct btrfs_root
*root
, int *was_new
);
2407 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2408 unsigned from
, unsigned to
);
2409 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2410 size_t page_offset
, u64 start
, u64 end
,
2412 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2413 struct btrfs_root
*root
,
2414 struct inode
*inode
);
2415 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2416 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2417 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
2418 void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle
*trans
,
2419 struct btrfs_pending_snapshot
*pending
,
2420 u64
*bytes_to_reserve
);
2421 void btrfs_orphan_post_snapshot(struct btrfs_trans_handle
*trans
,
2422 struct btrfs_pending_snapshot
*pending
);
2423 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
2424 struct btrfs_root
*root
);
2425 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
2426 int btrfs_invalidate_inodes(struct btrfs_root
*root
);
2427 void btrfs_add_delayed_iput(struct inode
*inode
);
2428 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
2429 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
2430 u64 start
, u64 num_bytes
, u64 min_size
,
2431 loff_t actual_len
, u64
*alloc_hint
);
2432 extern const struct dentry_operations btrfs_dentry_operations
;
2435 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2436 void btrfs_update_iflags(struct inode
*inode
);
2437 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2440 int btrfs_sync_file(struct file
*file
, int datasync
);
2441 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2443 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2444 extern const struct file_operations btrfs_file_operations
;
2445 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
2446 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
2447 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2448 struct inode
*inode
, u64 start
, u64 end
);
2449 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2452 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2453 struct btrfs_root
*root
, int cache_only
);
2456 int btrfs_init_sysfs(void);
2457 void btrfs_exit_sysfs(void);
2458 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2459 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2460 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2461 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2464 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2467 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2468 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2471 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2472 int btrfs_check_acl(struct inode
*inode
, int mask
);
2474 #define btrfs_check_acl NULL
2476 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2477 struct inode
*inode
, struct inode
*dir
);
2478 int btrfs_acl_chmod(struct inode
*inode
);
2481 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
2482 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
2483 struct btrfs_root
*root
);
2484 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
2485 struct btrfs_root
*root
);
2486 int btrfs_recover_relocation(struct btrfs_root
*root
);
2487 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
2488 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
2489 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2490 struct extent_buffer
*cow
);
2491 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
2492 struct btrfs_pending_snapshot
*pending
,
2493 u64
*bytes_to_reserve
);
2494 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
2495 struct btrfs_pending_snapshot
*pending
);