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 /* For storing free space cache */
103 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
105 /* dummy objectid represents multiple objectids */
106 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
109 * All files have objectids in this range.
111 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
112 #define BTRFS_LAST_FREE_OBJECTID -256ULL
113 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
117 * the device items go into the chunk tree. The key is in the form
118 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
120 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
122 #define BTRFS_BTREE_INODE_OBJECTID 1
124 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
127 * we can actually store much bigger names, but lets not confuse the rest
130 #define BTRFS_NAME_LEN 255
132 /* 32 bytes in various csum fields */
133 #define BTRFS_CSUM_SIZE 32
136 #define BTRFS_CSUM_TYPE_CRC32 0
138 static int btrfs_csum_sizes
[] = { 4, 0 };
140 /* four bytes for CRC32 */
141 #define BTRFS_EMPTY_DIR_SIZE 0
143 #define BTRFS_FT_UNKNOWN 0
144 #define BTRFS_FT_REG_FILE 1
145 #define BTRFS_FT_DIR 2
146 #define BTRFS_FT_CHRDEV 3
147 #define BTRFS_FT_BLKDEV 4
148 #define BTRFS_FT_FIFO 5
149 #define BTRFS_FT_SOCK 6
150 #define BTRFS_FT_SYMLINK 7
151 #define BTRFS_FT_XATTR 8
152 #define BTRFS_FT_MAX 9
155 * The key defines the order in the tree, and so it also defines (optimal)
158 * objectid corresponds to the inode number.
160 * type tells us things about the object, and is a kind of stream selector.
161 * so for a given inode, keys with type of 1 might refer to the inode data,
162 * type of 2 may point to file data in the btree and type == 3 may point to
165 * offset is the starting byte offset for this key in the stream.
167 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
168 * in cpu native order. Otherwise they are identical and their sizes
169 * should be the same (ie both packed)
171 struct btrfs_disk_key
{
175 } __attribute__ ((__packed__
));
181 } __attribute__ ((__packed__
));
183 struct btrfs_mapping_tree
{
184 struct extent_map_tree map_tree
;
187 #define BTRFS_UUID_SIZE 16
188 struct btrfs_dev_item
{
189 /* the internal btrfs device id */
192 /* size of the device */
198 /* optimal io alignment for this device */
201 /* optimal io width for this device */
204 /* minimal io size for this device */
207 /* type and info about this device */
210 /* expected generation for this device */
214 * starting byte of this partition on the device,
215 * to allow for stripe alignment in the future
219 /* grouping information for allocation decisions */
222 /* seek speed 0-100 where 100 is fastest */
225 /* bandwidth 0-100 where 100 is fastest */
228 /* btrfs generated uuid for this device */
229 u8 uuid
[BTRFS_UUID_SIZE
];
231 /* uuid of FS who owns this device */
232 u8 fsid
[BTRFS_UUID_SIZE
];
233 } __attribute__ ((__packed__
));
235 struct btrfs_stripe
{
238 u8 dev_uuid
[BTRFS_UUID_SIZE
];
239 } __attribute__ ((__packed__
));
242 /* size of this chunk in bytes */
245 /* objectid of the root referencing this chunk */
251 /* optimal io alignment for this chunk */
254 /* optimal io width for this chunk */
257 /* minimal io size for this chunk */
260 /* 2^16 stripes is quite a lot, a second limit is the size of a single
265 /* sub stripes only matter for raid10 */
267 struct btrfs_stripe stripe
;
268 /* additional stripes go here */
269 } __attribute__ ((__packed__
));
271 #define BTRFS_FREE_SPACE_EXTENT 1
272 #define BTRFS_FREE_SPACE_BITMAP 2
274 struct btrfs_free_space_entry
{
278 } __attribute__ ((__packed__
));
280 struct btrfs_free_space_header
{
281 struct btrfs_disk_key location
;
285 } __attribute__ ((__packed__
));
287 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
289 BUG_ON(num_stripes
== 0);
290 return sizeof(struct btrfs_chunk
) +
291 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
294 #define BTRFS_FSID_SIZE 16
295 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
296 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
297 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
298 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
300 #define BTRFS_BACKREF_REV_MAX 256
301 #define BTRFS_BACKREF_REV_SHIFT 56
302 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
303 BTRFS_BACKREF_REV_SHIFT)
305 #define BTRFS_OLD_BACKREF_REV 0
306 #define BTRFS_MIXED_BACKREF_REV 1
309 * every tree block (leaf or node) starts with this header.
311 struct btrfs_header
{
312 /* these first four must match the super block */
313 u8 csum
[BTRFS_CSUM_SIZE
];
314 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
315 __le64 bytenr
; /* which block this node is supposed to live in */
318 /* allowed to be different from the super from here on down */
319 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
324 } __attribute__ ((__packed__
));
326 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
327 sizeof(struct btrfs_header)) / \
328 sizeof(struct btrfs_key_ptr))
329 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
330 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
331 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
332 sizeof(struct btrfs_item) - \
333 sizeof(struct btrfs_file_extent_item))
334 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
335 sizeof(struct btrfs_item) -\
336 sizeof(struct btrfs_dir_item))
340 * this is a very generous portion of the super block, giving us
341 * room to translate 14 chunks with 3 stripes each.
343 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
344 #define BTRFS_LABEL_SIZE 256
347 * the super block basically lists the main trees of the FS
348 * it currently lacks any block count etc etc
350 struct btrfs_super_block
{
351 u8 csum
[BTRFS_CSUM_SIZE
];
352 /* the first 4 fields must match struct btrfs_header */
353 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
354 __le64 bytenr
; /* this block number */
357 /* allowed to be different from the btrfs_header from here own down */
364 /* this will help find the new super based on the log root */
365 __le64 log_root_transid
;
368 __le64 root_dir_objectid
;
374 __le32 sys_chunk_array_size
;
375 __le64 chunk_root_generation
;
377 __le64 compat_ro_flags
;
378 __le64 incompat_flags
;
383 struct btrfs_dev_item dev_item
;
385 char label
[BTRFS_LABEL_SIZE
];
387 __le64 cache_generation
;
389 /* future expansion */
391 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
392 } __attribute__ ((__packed__
));
395 * Compat flags that we support. If any incompat flags are set other than the
396 * ones specified below then we will fail to mount
398 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
399 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
400 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
402 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
403 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
404 #define BTRFS_FEATURE_INCOMPAT_SUPP \
405 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
406 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
407 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
410 * A leaf is full of items. offset and size tell us where to find
411 * the item in the leaf (relative to the start of the data area)
414 struct btrfs_disk_key key
;
417 } __attribute__ ((__packed__
));
420 * leaves have an item area and a data area:
421 * [item0, item1....itemN] [free space] [dataN...data1, data0]
423 * The data is separate from the items to get the keys closer together
427 struct btrfs_header header
;
428 struct btrfs_item items
[];
429 } __attribute__ ((__packed__
));
432 * all non-leaf blocks are nodes, they hold only keys and pointers to
435 struct btrfs_key_ptr
{
436 struct btrfs_disk_key key
;
439 } __attribute__ ((__packed__
));
442 struct btrfs_header header
;
443 struct btrfs_key_ptr ptrs
[];
444 } __attribute__ ((__packed__
));
447 * btrfs_paths remember the path taken from the root down to the leaf.
448 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
449 * to any other levels that are present.
451 * The slots array records the index of the item or block pointer
452 * used while walking the tree.
455 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
456 int slots
[BTRFS_MAX_LEVEL
];
457 /* if there is real range locking, this locks field will change */
458 int locks
[BTRFS_MAX_LEVEL
];
460 /* keep some upper locks as we walk down */
464 * set by btrfs_split_item, tells search_slot to keep all locks
465 * and to force calls to keep space in the nodes
467 unsigned int search_for_split
:1;
468 unsigned int keep_locks
:1;
469 unsigned int skip_locking
:1;
470 unsigned int leave_spinning
:1;
471 unsigned int search_commit_root
:1;
475 * items in the extent btree are used to record the objectid of the
476 * owner of the block and the number of references
479 struct btrfs_extent_item
{
483 } __attribute__ ((__packed__
));
485 struct btrfs_extent_item_v0
{
487 } __attribute__ ((__packed__
));
489 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
490 sizeof(struct btrfs_item))
492 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
493 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
495 /* following flags only apply to tree blocks */
497 /* use full backrefs for extent pointers in the block */
498 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
500 struct btrfs_tree_block_info
{
501 struct btrfs_disk_key key
;
503 } __attribute__ ((__packed__
));
505 struct btrfs_extent_data_ref
{
510 } __attribute__ ((__packed__
));
512 struct btrfs_shared_data_ref
{
514 } __attribute__ ((__packed__
));
516 struct btrfs_extent_inline_ref
{
519 } __attribute__ ((__packed__
));
521 /* old style backrefs item */
522 struct btrfs_extent_ref_v0
{
527 } __attribute__ ((__packed__
));
530 /* dev extents record free space on individual devices. The owner
531 * field points back to the chunk allocation mapping tree that allocated
532 * the extent. The chunk tree uuid field is a way to double check the owner
534 struct btrfs_dev_extent
{
536 __le64 chunk_objectid
;
539 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
540 } __attribute__ ((__packed__
));
542 struct btrfs_inode_ref
{
546 } __attribute__ ((__packed__
));
548 struct btrfs_timespec
{
551 } __attribute__ ((__packed__
));
553 enum btrfs_compression_type
{
554 BTRFS_COMPRESS_NONE
= 0,
555 BTRFS_COMPRESS_ZLIB
= 1,
556 BTRFS_COMPRESS_LAST
= 2,
559 struct btrfs_inode_item
{
560 /* nfs style generation number */
562 /* transid that last touched this inode */
574 /* modification sequence number for NFS */
578 * a little future expansion, for more than this we can
579 * just grow the inode item and version it
582 struct btrfs_timespec atime
;
583 struct btrfs_timespec ctime
;
584 struct btrfs_timespec mtime
;
585 struct btrfs_timespec otime
;
586 } __attribute__ ((__packed__
));
588 struct btrfs_dir_log_item
{
590 } __attribute__ ((__packed__
));
592 struct btrfs_dir_item
{
593 struct btrfs_disk_key location
;
598 } __attribute__ ((__packed__
));
600 struct btrfs_root_item
{
601 struct btrfs_inode_item inode
;
607 __le64 last_snapshot
;
610 struct btrfs_disk_key drop_progress
;
613 } __attribute__ ((__packed__
));
616 * this is used for both forward and backward root refs
618 struct btrfs_root_ref
{
622 } __attribute__ ((__packed__
));
624 #define BTRFS_FILE_EXTENT_INLINE 0
625 #define BTRFS_FILE_EXTENT_REG 1
626 #define BTRFS_FILE_EXTENT_PREALLOC 2
628 struct btrfs_file_extent_item
{
630 * transaction id that created this extent
634 * max number of bytes to hold this extent in ram
635 * when we split a compressed extent we can't know how big
636 * each of the resulting pieces will be. So, this is
637 * an upper limit on the size of the extent in ram instead of
643 * 32 bits for the various ways we might encode the data,
644 * including compression and encryption. If any of these
645 * are set to something a given disk format doesn't understand
646 * it is treated like an incompat flag for reading and writing,
651 __le16 other_encoding
; /* spare for later use */
653 /* are we inline data or a real extent? */
657 * disk space consumed by the extent, checksum blocks are included
661 __le64 disk_num_bytes
;
663 * the logical offset in file blocks (no csums)
664 * this extent record is for. This allows a file extent to point
665 * into the middle of an existing extent on disk, sharing it
666 * between two snapshots (useful if some bytes in the middle of the
667 * extent have changed
671 * the logical number of file blocks (no csums included). This
672 * always reflects the size uncompressed and without encoding.
676 } __attribute__ ((__packed__
));
678 struct btrfs_csum_item
{
680 } __attribute__ ((__packed__
));
682 /* different types of block groups (and chunks) */
683 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
684 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
685 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
686 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
687 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
688 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
689 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
690 #define BTRFS_NR_RAID_TYPES 5
692 struct btrfs_block_group_item
{
694 __le64 chunk_objectid
;
696 } __attribute__ ((__packed__
));
698 struct btrfs_space_info
{
701 u64 total_bytes
; /* total bytes in the space */
702 u64 bytes_used
; /* total bytes used,
703 this does't take mirrors into account */
704 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
705 transaction finishes */
706 u64 bytes_reserved
; /* total bytes the allocator has reserved for
707 current allocations */
708 u64 bytes_readonly
; /* total bytes that are read only */
710 u64 bytes_may_use
; /* number of bytes that may be used for
711 delalloc/allocations */
712 u64 disk_used
; /* total bytes used on disk */
714 int full
; /* indicates that we cannot allocate any more
715 chunks for this space */
716 int force_alloc
; /* set if we need to force a chunk alloc for
719 struct list_head list
;
721 /* for block groups in our same type */
722 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
724 struct rw_semaphore groups_sem
;
725 atomic_t caching_threads
;
728 struct btrfs_block_rsv
{
732 struct btrfs_space_info
*space_info
;
733 struct list_head list
;
736 unsigned int priority
:8;
737 unsigned int durable
:1;
738 unsigned int refill_used
:1;
743 * free clusters are used to claim free space in relatively large chunks,
744 * allowing us to do less seeky writes. They are used for all metadata
745 * allocations and data allocations in ssd mode.
747 struct btrfs_free_cluster
{
749 spinlock_t refill_lock
;
752 /* largest extent in this cluster */
755 /* first extent starting offset */
758 /* if this cluster simply points at a bitmap in the block group */
759 bool points_to_bitmap
;
761 struct btrfs_block_group_cache
*block_group
;
763 * when a cluster is allocated from a block group, we put the
764 * cluster onto a list in the block group so that it can
765 * be freed before the block group is freed.
767 struct list_head block_group_list
;
770 enum btrfs_caching_type
{
772 BTRFS_CACHE_STARTED
= 1,
773 BTRFS_CACHE_FINISHED
= 2,
776 enum btrfs_disk_cache_state
{
777 BTRFS_DC_WRITTEN
= 0,
781 BTRFS_DC_NEED_WRITE
= 4,
784 struct btrfs_caching_control
{
785 struct list_head list
;
787 wait_queue_head_t wait
;
788 struct btrfs_block_group_cache
*block_group
;
793 struct btrfs_block_group_cache
{
794 struct btrfs_key key
;
795 struct btrfs_block_group_item item
;
796 struct btrfs_fs_info
*fs_info
;
812 int disk_cache_state
;
814 /* cache tracking stuff */
816 struct btrfs_caching_control
*caching_ctl
;
817 u64 last_byte_to_unpin
;
819 struct btrfs_space_info
*space_info
;
821 /* free space cache stuff */
822 spinlock_t tree_lock
;
823 struct rb_root free_space_offset
;
826 /* block group cache stuff */
827 struct rb_node cache_node
;
829 /* for block groups in the same raid type */
830 struct list_head list
;
835 /* List of struct btrfs_free_clusters for this block group.
836 * Today it will only have one thing on it, but that may change
838 struct list_head cluster_list
;
841 struct reloc_control
;
843 struct btrfs_fs_devices
;
844 struct btrfs_fs_info
{
845 u8 fsid
[BTRFS_FSID_SIZE
];
846 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
847 struct btrfs_root
*extent_root
;
848 struct btrfs_root
*tree_root
;
849 struct btrfs_root
*chunk_root
;
850 struct btrfs_root
*dev_root
;
851 struct btrfs_root
*fs_root
;
852 struct btrfs_root
*csum_root
;
854 /* the log root tree is a directory of all the other log roots */
855 struct btrfs_root
*log_root_tree
;
857 spinlock_t fs_roots_radix_lock
;
858 struct radix_tree_root fs_roots_radix
;
860 /* block group cache stuff */
861 spinlock_t block_group_cache_lock
;
862 struct rb_root block_group_cache_tree
;
864 struct extent_io_tree freed_extents
[2];
865 struct extent_io_tree
*pinned_extents
;
867 /* logical->physical extent mapping */
868 struct btrfs_mapping_tree mapping_tree
;
870 /* block reservation for extent, checksum and root tree */
871 struct btrfs_block_rsv global_block_rsv
;
872 /* block reservation for delay allocation */
873 struct btrfs_block_rsv delalloc_block_rsv
;
874 /* block reservation for metadata operations */
875 struct btrfs_block_rsv trans_block_rsv
;
876 /* block reservation for chunk tree */
877 struct btrfs_block_rsv chunk_block_rsv
;
879 struct btrfs_block_rsv empty_block_rsv
;
881 /* list of block reservations that cross multiple transactions */
882 struct list_head durable_block_rsv_list
;
884 struct mutex durable_block_rsv_mutex
;
887 u64 last_trans_committed
;
890 * this is updated to the current trans every time a full commit
891 * is required instead of the faster short fsync log commits
893 u64 last_trans_log_full_commit
;
894 u64 open_ioctl_trans
;
895 unsigned long mount_opt
;
898 struct btrfs_transaction
*running_transaction
;
899 wait_queue_head_t transaction_throttle
;
900 wait_queue_head_t transaction_wait
;
901 wait_queue_head_t async_submit_wait
;
903 struct btrfs_super_block super_copy
;
904 struct btrfs_super_block super_for_commit
;
905 struct block_device
*__bdev
;
906 struct super_block
*sb
;
907 struct inode
*btree_inode
;
908 struct backing_dev_info bdi
;
909 struct mutex trans_mutex
;
910 struct mutex tree_log_mutex
;
911 struct mutex transaction_kthread_mutex
;
912 struct mutex cleaner_mutex
;
913 struct mutex chunk_mutex
;
914 struct mutex volume_mutex
;
916 * this protects the ordered operations list only while we are
917 * processing all of the entries on it. This way we make
918 * sure the commit code doesn't find the list temporarily empty
919 * because another function happens to be doing non-waiting preflush
920 * before jumping into the main commit.
922 struct mutex ordered_operations_mutex
;
923 struct rw_semaphore extent_commit_sem
;
925 struct rw_semaphore cleanup_work_sem
;
927 struct rw_semaphore subvol_sem
;
928 struct srcu_struct subvol_srcu
;
930 struct list_head trans_list
;
931 struct list_head hashers
;
932 struct list_head dead_roots
;
933 struct list_head caching_block_groups
;
935 spinlock_t delayed_iput_lock
;
936 struct list_head delayed_iputs
;
938 atomic_t nr_async_submits
;
939 atomic_t async_submit_draining
;
940 atomic_t nr_async_bios
;
941 atomic_t async_delalloc_pages
;
944 * this is used by the balancing code to wait for all the pending
947 spinlock_t ordered_extent_lock
;
950 * all of the data=ordered extents pending writeback
951 * these can span multiple transactions and basically include
952 * every dirty data page that isn't from nodatacow
954 struct list_head ordered_extents
;
957 * all of the inodes that have delalloc bytes. It is possible for
958 * this list to be empty even when there is still dirty data=ordered
959 * extents waiting to finish IO.
961 struct list_head delalloc_inodes
;
964 * special rename and truncate targets that must be on disk before
965 * we're allowed to commit. This is basically the ext3 style
968 struct list_head ordered_operations
;
971 * there is a pool of worker threads for checksumming during writes
972 * and a pool for checksumming after reads. This is because readers
973 * can run with FS locks held, and the writers may be waiting for
974 * those locks. We don't want ordering in the pending list to cause
975 * deadlocks, and so the two are serviced separately.
977 * A third pool does submit_bio to avoid deadlocking with the other
980 struct btrfs_workers generic_worker
;
981 struct btrfs_workers workers
;
982 struct btrfs_workers delalloc_workers
;
983 struct btrfs_workers endio_workers
;
984 struct btrfs_workers endio_meta_workers
;
985 struct btrfs_workers endio_meta_write_workers
;
986 struct btrfs_workers endio_write_workers
;
987 struct btrfs_workers endio_freespace_worker
;
988 struct btrfs_workers submit_workers
;
990 * fixup workers take dirty pages that didn't properly go through
991 * the cow mechanism and make them safe to write. It happens
992 * for the sys_munmap function call path
994 struct btrfs_workers fixup_workers
;
995 struct task_struct
*transaction_kthread
;
996 struct task_struct
*cleaner_kthread
;
997 int thread_pool_size
;
999 struct kobject super_kobj
;
1000 struct completion kobj_unregister
;
1003 int log_root_recovering
;
1008 /* protected by the delalloc lock, used to keep from writing
1009 * metadata until there is a nice batch
1011 u64 dirty_metadata_bytes
;
1012 struct list_head dirty_cowonly_roots
;
1014 struct btrfs_fs_devices
*fs_devices
;
1017 * the space_info list is almost entirely read only. It only changes
1018 * when we add a new raid type to the FS, and that happens
1019 * very rarely. RCU is used to protect it.
1021 struct list_head space_info
;
1023 struct reloc_control
*reloc_ctl
;
1025 spinlock_t delalloc_lock
;
1026 spinlock_t new_trans_lock
;
1029 /* data_alloc_cluster is only used in ssd mode */
1030 struct btrfs_free_cluster data_alloc_cluster
;
1032 /* all metadata allocations go through this cluster */
1033 struct btrfs_free_cluster meta_alloc_cluster
;
1035 spinlock_t ref_cache_lock
;
1036 u64 total_ref_cache_size
;
1038 u64 avail_data_alloc_bits
;
1039 u64 avail_metadata_alloc_bits
;
1040 u64 avail_system_alloc_bits
;
1041 u64 data_alloc_profile
;
1042 u64 metadata_alloc_profile
;
1043 u64 system_alloc_profile
;
1045 unsigned data_chunk_allocations
;
1046 unsigned metadata_ratio
;
1052 * in ram representation of the tree. extent_root is used for all allocations
1053 * and for the extent tree extent_root root.
1056 struct extent_buffer
*node
;
1058 /* the node lock is held while changing the node pointer */
1059 spinlock_t node_lock
;
1061 struct extent_buffer
*commit_root
;
1062 struct btrfs_root
*log_root
;
1063 struct btrfs_root
*reloc_root
;
1065 struct btrfs_root_item root_item
;
1066 struct btrfs_key root_key
;
1067 struct btrfs_fs_info
*fs_info
;
1068 struct extent_io_tree dirty_log_pages
;
1070 struct kobject root_kobj
;
1071 struct completion kobj_unregister
;
1072 struct mutex objectid_mutex
;
1074 spinlock_t accounting_lock
;
1075 struct btrfs_block_rsv
*block_rsv
;
1077 struct mutex log_mutex
;
1078 wait_queue_head_t log_writer_wait
;
1079 wait_queue_head_t log_commit_wait
[2];
1080 atomic_t log_writers
;
1081 atomic_t log_commit
[2];
1082 unsigned long log_transid
;
1083 unsigned long last_log_commit
;
1084 unsigned long log_batch
;
1085 pid_t log_start_pid
;
1086 bool log_multiple_pids
;
1091 /* data allocations are done in sectorsize units */
1094 /* node allocations are done in nodesize units */
1097 /* leaf allocations are done in leafsize units */
1104 u64 highest_objectid
;
1109 u64 defrag_trans_start
;
1110 struct btrfs_key defrag_progress
;
1111 struct btrfs_key defrag_max
;
1116 /* the dirty list is only used by non-reference counted roots */
1117 struct list_head dirty_list
;
1119 struct list_head root_list
;
1121 spinlock_t orphan_lock
;
1122 struct list_head orphan_list
;
1123 struct btrfs_block_rsv
*orphan_block_rsv
;
1124 int orphan_item_inserted
;
1125 int orphan_cleanup_state
;
1127 spinlock_t inode_lock
;
1128 /* red-black tree that keeps track of in-memory inodes */
1129 struct rb_root inode_tree
;
1132 * right now this just gets used so that a root has its own devid
1133 * for stat. It may be used for more later
1135 struct super_block anon_super
;
1139 * inode items have the data typically returned from stat and store other
1140 * info about object characteristics. There is one for every file and dir in
1143 #define BTRFS_INODE_ITEM_KEY 1
1144 #define BTRFS_INODE_REF_KEY 12
1145 #define BTRFS_XATTR_ITEM_KEY 24
1146 #define BTRFS_ORPHAN_ITEM_KEY 48
1147 /* reserve 2-15 close to the inode for later flexibility */
1150 * dir items are the name -> inode pointers in a directory. There is one
1151 * for every name in a directory.
1153 #define BTRFS_DIR_LOG_ITEM_KEY 60
1154 #define BTRFS_DIR_LOG_INDEX_KEY 72
1155 #define BTRFS_DIR_ITEM_KEY 84
1156 #define BTRFS_DIR_INDEX_KEY 96
1158 * extent data is for file data
1160 #define BTRFS_EXTENT_DATA_KEY 108
1163 * extent csums are stored in a separate tree and hold csums for
1164 * an entire extent on disk.
1166 #define BTRFS_EXTENT_CSUM_KEY 128
1169 * root items point to tree roots. They are typically in the root
1170 * tree used by the super block to find all the other trees
1172 #define BTRFS_ROOT_ITEM_KEY 132
1175 * root backrefs tie subvols and snapshots to the directory entries that
1178 #define BTRFS_ROOT_BACKREF_KEY 144
1181 * root refs make a fast index for listing all of the snapshots and
1182 * subvolumes referenced by a given root. They point directly to the
1183 * directory item in the root that references the subvol
1185 #define BTRFS_ROOT_REF_KEY 156
1188 * extent items are in the extent map tree. These record which blocks
1189 * are used, and how many references there are to each block
1191 #define BTRFS_EXTENT_ITEM_KEY 168
1193 #define BTRFS_TREE_BLOCK_REF_KEY 176
1195 #define BTRFS_EXTENT_DATA_REF_KEY 178
1197 #define BTRFS_EXTENT_REF_V0_KEY 180
1199 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1201 #define BTRFS_SHARED_DATA_REF_KEY 184
1204 * block groups give us hints into the extent allocation trees. Which
1205 * blocks are free etc etc
1207 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1209 #define BTRFS_DEV_EXTENT_KEY 204
1210 #define BTRFS_DEV_ITEM_KEY 216
1211 #define BTRFS_CHUNK_ITEM_KEY 228
1214 * string items are for debugging. They just store a short string of
1217 #define BTRFS_STRING_ITEM_KEY 253
1219 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1220 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1221 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1222 #define BTRFS_MOUNT_SSD (1 << 3)
1223 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1224 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1225 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1226 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1227 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1228 #define BTRFS_MOUNT_NOSSD (1 << 9)
1229 #define BTRFS_MOUNT_DISCARD (1 << 10)
1230 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1231 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1233 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1234 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1235 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1240 #define BTRFS_INODE_NODATASUM (1 << 0)
1241 #define BTRFS_INODE_NODATACOW (1 << 1)
1242 #define BTRFS_INODE_READONLY (1 << 2)
1243 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1244 #define BTRFS_INODE_PREALLOC (1 << 4)
1245 #define BTRFS_INODE_SYNC (1 << 5)
1246 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1247 #define BTRFS_INODE_APPEND (1 << 7)
1248 #define BTRFS_INODE_NODUMP (1 << 8)
1249 #define BTRFS_INODE_NOATIME (1 << 9)
1250 #define BTRFS_INODE_DIRSYNC (1 << 10)
1252 /* some macros to generate set/get funcs for the struct fields. This
1253 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1256 #define le8_to_cpu(v) (v)
1257 #define cpu_to_le8(v) (v)
1260 #define read_eb_member(eb, ptr, type, member, result) ( \
1261 read_extent_buffer(eb, (char *)(result), \
1262 ((unsigned long)(ptr)) + \
1263 offsetof(type, member), \
1264 sizeof(((type *)0)->member)))
1266 #define write_eb_member(eb, ptr, type, member, result) ( \
1267 write_extent_buffer(eb, (char *)(result), \
1268 ((unsigned long)(ptr)) + \
1269 offsetof(type, member), \
1270 sizeof(((type *)0)->member)))
1272 #ifndef BTRFS_SETGET_FUNCS
1273 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1274 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1275 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1278 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1279 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1281 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1282 u##bits res = le##bits##_to_cpu(p->member); \
1283 kunmap_atomic(p, KM_USER0); \
1286 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1289 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1290 p->member = cpu_to_le##bits(val); \
1291 kunmap_atomic(p, KM_USER0); \
1294 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1295 static inline u##bits btrfs_##name(type *s) \
1297 return le##bits##_to_cpu(s->member); \
1299 static inline void btrfs_set_##name(type *s, u##bits val) \
1301 s->member = cpu_to_le##bits(val); \
1304 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1305 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1306 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1307 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1308 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1309 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1311 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1312 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1313 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1314 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1315 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1316 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1318 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1319 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1321 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1323 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1325 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1327 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1329 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1330 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1332 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1334 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1336 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1339 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1341 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1344 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1346 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1349 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1350 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1351 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1352 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1353 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1354 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1355 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1356 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1357 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1358 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1359 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1361 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1363 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1366 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1367 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1368 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1370 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1372 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1374 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1376 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1377 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1379 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1381 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1382 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1384 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1387 unsigned long offset
= (unsigned long)c
;
1388 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1389 offset
+= nr
* sizeof(struct btrfs_stripe
);
1390 return (struct btrfs_stripe
*)offset
;
1393 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1395 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1398 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1399 struct btrfs_chunk
*c
, int nr
)
1401 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1404 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1405 struct btrfs_chunk
*c
, int nr
,
1408 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1411 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1412 struct btrfs_chunk
*c
, int nr
)
1414 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1417 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1418 struct btrfs_chunk
*c
, int nr
,
1421 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1424 /* struct btrfs_block_group_item */
1425 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1427 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1429 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1430 struct btrfs_block_group_item
, chunk_objectid
, 64);
1432 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1433 struct btrfs_block_group_item
, chunk_objectid
, 64);
1434 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1435 struct btrfs_block_group_item
, flags
, 64);
1436 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1437 struct btrfs_block_group_item
, flags
, 64);
1439 /* struct btrfs_inode_ref */
1440 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1441 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1443 /* struct btrfs_inode_item */
1444 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1445 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1446 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1447 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1448 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1449 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1450 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1451 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1452 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1453 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1454 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1455 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1457 static inline struct btrfs_timespec
*
1458 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1460 unsigned long ptr
= (unsigned long)inode_item
;
1461 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1462 return (struct btrfs_timespec
*)ptr
;
1465 static inline struct btrfs_timespec
*
1466 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1468 unsigned long ptr
= (unsigned long)inode_item
;
1469 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1470 return (struct btrfs_timespec
*)ptr
;
1473 static inline struct btrfs_timespec
*
1474 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1476 unsigned long ptr
= (unsigned long)inode_item
;
1477 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1478 return (struct btrfs_timespec
*)ptr
;
1481 static inline struct btrfs_timespec
*
1482 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1484 unsigned long ptr
= (unsigned long)inode_item
;
1485 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1486 return (struct btrfs_timespec
*)ptr
;
1489 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1490 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1492 /* struct btrfs_dev_extent */
1493 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1495 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1496 chunk_objectid
, 64);
1497 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1499 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1501 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1503 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1504 return (u8
*)((unsigned long)dev
+ ptr
);
1507 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1508 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1510 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1512 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1515 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1517 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1518 struct btrfs_tree_block_info
*item
,
1519 struct btrfs_disk_key
*key
)
1521 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1524 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1525 struct btrfs_tree_block_info
*item
,
1526 struct btrfs_disk_key
*key
)
1528 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1531 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1533 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1535 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1537 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1540 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1543 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1545 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1548 static inline u32
btrfs_extent_inline_ref_size(int type
)
1550 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1551 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1552 return sizeof(struct btrfs_extent_inline_ref
);
1553 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1554 return sizeof(struct btrfs_shared_data_ref
) +
1555 sizeof(struct btrfs_extent_inline_ref
);
1556 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1557 return sizeof(struct btrfs_extent_data_ref
) +
1558 offsetof(struct btrfs_extent_inline_ref
, offset
);
1563 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1564 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1566 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1567 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1569 /* struct btrfs_node */
1570 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1571 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1573 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1576 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1577 sizeof(struct btrfs_key_ptr
) * nr
;
1578 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1581 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1585 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1586 sizeof(struct btrfs_key_ptr
) * nr
;
1587 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1590 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1593 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1594 sizeof(struct btrfs_key_ptr
) * nr
;
1595 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1598 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1602 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1603 sizeof(struct btrfs_key_ptr
) * nr
;
1604 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1607 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1609 return offsetof(struct btrfs_node
, ptrs
) +
1610 sizeof(struct btrfs_key_ptr
) * nr
;
1613 void btrfs_node_key(struct extent_buffer
*eb
,
1614 struct btrfs_disk_key
*disk_key
, int nr
);
1616 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1617 struct btrfs_disk_key
*disk_key
, int nr
)
1620 ptr
= btrfs_node_key_ptr_offset(nr
);
1621 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1622 struct btrfs_key_ptr
, key
, disk_key
);
1625 /* struct btrfs_item */
1626 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1627 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1629 static inline unsigned long btrfs_item_nr_offset(int nr
)
1631 return offsetof(struct btrfs_leaf
, items
) +
1632 sizeof(struct btrfs_item
) * nr
;
1635 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1638 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1641 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1642 struct btrfs_item
*item
)
1644 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1647 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1649 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1652 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1654 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1657 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1659 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1662 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1663 struct btrfs_disk_key
*disk_key
, int nr
)
1665 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1666 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1669 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1670 struct btrfs_disk_key
*disk_key
, int nr
)
1672 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1673 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1676 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1679 * struct btrfs_root_ref
1681 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1682 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1683 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1685 /* struct btrfs_dir_item */
1686 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1687 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1688 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1689 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1691 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1692 struct btrfs_dir_item
*item
,
1693 struct btrfs_disk_key
*key
)
1695 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1698 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1699 struct btrfs_dir_item
*item
,
1700 struct btrfs_disk_key
*key
)
1702 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1705 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1707 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1709 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1712 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1713 struct btrfs_free_space_header
*h
,
1714 struct btrfs_disk_key
*key
)
1716 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1719 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1720 struct btrfs_free_space_header
*h
,
1721 struct btrfs_disk_key
*key
)
1723 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1726 /* struct btrfs_disk_key */
1727 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1729 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1730 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1732 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1733 struct btrfs_disk_key
*disk
)
1735 cpu
->offset
= le64_to_cpu(disk
->offset
);
1736 cpu
->type
= disk
->type
;
1737 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1740 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1741 struct btrfs_key
*cpu
)
1743 disk
->offset
= cpu_to_le64(cpu
->offset
);
1744 disk
->type
= cpu
->type
;
1745 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1748 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1749 struct btrfs_key
*key
, int nr
)
1751 struct btrfs_disk_key disk_key
;
1752 btrfs_node_key(eb
, &disk_key
, nr
);
1753 btrfs_disk_key_to_cpu(key
, &disk_key
);
1756 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1757 struct btrfs_key
*key
, int nr
)
1759 struct btrfs_disk_key disk_key
;
1760 btrfs_item_key(eb
, &disk_key
, nr
);
1761 btrfs_disk_key_to_cpu(key
, &disk_key
);
1764 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1765 struct btrfs_dir_item
*item
,
1766 struct btrfs_key
*key
)
1768 struct btrfs_disk_key disk_key
;
1769 btrfs_dir_item_key(eb
, item
, &disk_key
);
1770 btrfs_disk_key_to_cpu(key
, &disk_key
);
1774 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1779 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1784 /* struct btrfs_header */
1785 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1786 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1788 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1789 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1790 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1791 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1793 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1795 return (btrfs_header_flags(eb
) & flag
) == flag
;
1798 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1800 u64 flags
= btrfs_header_flags(eb
);
1801 btrfs_set_header_flags(eb
, flags
| flag
);
1802 return (flags
& flag
) == flag
;
1805 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1807 u64 flags
= btrfs_header_flags(eb
);
1808 btrfs_set_header_flags(eb
, flags
& ~flag
);
1809 return (flags
& flag
) == flag
;
1812 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1814 u64 flags
= btrfs_header_flags(eb
);
1815 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1818 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1821 u64 flags
= btrfs_header_flags(eb
);
1822 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1823 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1824 btrfs_set_header_flags(eb
, flags
);
1827 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1829 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1833 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1835 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1839 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1841 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1845 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1847 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1851 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1856 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1861 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1866 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1868 return btrfs_header_level(eb
) == 0;
1871 /* struct btrfs_root_item */
1872 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1874 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1875 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1876 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1878 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1880 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1881 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1882 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1883 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1884 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1885 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1886 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1887 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1890 /* struct btrfs_super_block */
1892 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1893 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1894 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1896 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1897 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1898 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1899 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1900 struct btrfs_super_block
, chunk_root_generation
, 64);
1901 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1903 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1905 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1906 chunk_root_level
, 8);
1907 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1909 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1910 log_root_transid
, 64);
1911 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1913 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1915 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1917 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1919 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1921 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1923 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1925 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1926 root_dir_objectid
, 64);
1927 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1929 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1931 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1932 compat_ro_flags
, 64);
1933 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1934 incompat_flags
, 64);
1935 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1937 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
1938 cache_generation
, 64);
1940 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1942 int t
= btrfs_super_csum_type(s
);
1943 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1944 return btrfs_csum_sizes
[t
];
1947 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1949 return offsetof(struct btrfs_leaf
, items
);
1952 /* struct btrfs_file_extent_item */
1953 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1955 static inline unsigned long
1956 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
1958 unsigned long offset
= (unsigned long)e
;
1959 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1963 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1965 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1968 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1970 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1972 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1973 disk_num_bytes
, 64);
1974 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1976 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1978 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1980 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1982 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1984 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1985 other_encoding
, 16);
1987 /* this returns the number of file bytes represented by the inline item.
1988 * If an item is compressed, this is the uncompressed size
1990 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1991 struct btrfs_file_extent_item
*e
)
1993 return btrfs_file_extent_ram_bytes(eb
, e
);
1997 * this returns the number of bytes used by the item on disk, minus the
1998 * size of any extent headers. If a file is compressed on disk, this is
1999 * the compressed size
2001 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2002 struct btrfs_item
*e
)
2004 unsigned long offset
;
2005 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2006 return btrfs_item_size(eb
, e
) - offset
;
2009 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
2011 return sb
->s_fs_info
;
2014 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
2015 const char *name
, int len
)
2017 /* if we already have a name just free it */
2020 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
2024 memcpy(root
->name
, name
, len
);
2025 root
->name
[len
] = '\0';
2030 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2033 return root
->leafsize
;
2034 return root
->nodesize
;
2037 /* helper function to cast into the data area of the leaf. */
2038 #define btrfs_item_ptr(leaf, slot, type) \
2039 ((type *)(btrfs_leaf_data(leaf) + \
2040 btrfs_item_offset_nr(leaf, slot)))
2042 #define btrfs_item_ptr_offset(leaf, slot) \
2043 ((unsigned long)(btrfs_leaf_data(leaf) + \
2044 btrfs_item_offset_nr(leaf, slot)))
2046 static inline struct dentry
*fdentry(struct file
*file
)
2048 return file
->f_path
.dentry
;
2051 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2053 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2054 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2058 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2059 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2060 struct btrfs_root
*root
, unsigned long count
);
2061 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2062 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2063 struct btrfs_root
*root
, u64 bytenr
,
2064 u64 num_bytes
, u64
*refs
, u64
*flags
);
2065 int btrfs_pin_extent(struct btrfs_root
*root
,
2066 u64 bytenr
, u64 num
, int reserved
);
2067 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
2068 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2069 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2070 struct btrfs_root
*root
,
2071 u64 objectid
, u64 offset
, u64 bytenr
);
2072 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
2073 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2074 struct btrfs_fs_info
*info
,
2076 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2077 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2078 u64 search_start
, u64 search_hint
, int owner
);
2079 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2080 struct btrfs_root
*root
, u32 blocksize
,
2081 u64 parent
, u64 root_objectid
,
2082 struct btrfs_disk_key
*key
, int level
,
2083 u64 hint
, u64 empty_size
);
2084 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2085 struct btrfs_root
*root
,
2086 struct extent_buffer
*buf
,
2087 u64 parent
, int last_ref
);
2088 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2089 struct btrfs_root
*root
,
2090 u64 bytenr
, u32 blocksize
,
2092 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2093 struct btrfs_root
*root
,
2094 u64 root_objectid
, u64 owner
,
2095 u64 offset
, struct btrfs_key
*ins
);
2096 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2097 struct btrfs_root
*root
,
2098 u64 root_objectid
, u64 owner
, u64 offset
,
2099 struct btrfs_key
*ins
);
2100 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2101 struct btrfs_root
*root
,
2102 u64 num_bytes
, u64 min_alloc_size
,
2103 u64 empty_size
, u64 hint_byte
,
2104 u64 search_end
, struct btrfs_key
*ins
,
2106 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2107 struct extent_buffer
*buf
, int full_backref
);
2108 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2109 struct extent_buffer
*buf
, int full_backref
);
2110 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2111 struct btrfs_root
*root
,
2112 u64 bytenr
, u64 num_bytes
, u64 flags
,
2114 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2115 struct btrfs_root
*root
,
2116 u64 bytenr
, u64 num_bytes
, u64 parent
,
2117 u64 root_objectid
, u64 owner
, u64 offset
);
2119 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2120 int btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2121 struct btrfs_root
*root
);
2122 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2123 struct btrfs_root
*root
);
2124 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2125 struct btrfs_root
*root
,
2126 u64 bytenr
, u64 num_bytes
, u64 parent
,
2127 u64 root_objectid
, u64 owner
, u64 offset
);
2129 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2130 struct btrfs_root
*root
);
2131 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2132 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2133 int btrfs_read_block_groups(struct btrfs_root
*root
);
2134 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2135 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2136 struct btrfs_root
*root
, u64 bytes_used
,
2137 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2139 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2140 struct btrfs_root
*root
, u64 group_start
);
2141 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2142 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2143 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2144 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
2145 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
2146 int btrfs_trans_reserve_metadata(struct btrfs_trans_handle
*trans
,
2147 struct btrfs_root
*root
,
2148 int num_items
, int *retries
);
2149 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2150 struct btrfs_root
*root
);
2151 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2152 struct inode
*inode
);
2153 void btrfs_orphan_release_metadata(struct inode
*inode
);
2154 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
2155 struct btrfs_pending_snapshot
*pending
);
2156 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2157 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2158 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
2159 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
2160 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2161 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2162 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2163 struct btrfs_block_rsv
*rsv
);
2164 void btrfs_add_durable_block_rsv(struct btrfs_fs_info
*fs_info
,
2165 struct btrfs_block_rsv
*rsv
);
2166 int btrfs_block_rsv_add(struct btrfs_trans_handle
*trans
,
2167 struct btrfs_root
*root
,
2168 struct btrfs_block_rsv
*block_rsv
,
2169 u64 num_bytes
, int *retries
);
2170 int btrfs_block_rsv_check(struct btrfs_trans_handle
*trans
,
2171 struct btrfs_root
*root
,
2172 struct btrfs_block_rsv
*block_rsv
,
2173 u64 min_reserved
, int min_factor
);
2174 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2175 struct btrfs_block_rsv
*dst_rsv
,
2177 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2178 struct btrfs_block_rsv
*block_rsv
,
2180 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2181 struct btrfs_block_group_cache
*cache
);
2182 int btrfs_set_block_group_rw(struct btrfs_root
*root
,
2183 struct btrfs_block_group_cache
*cache
);
2184 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2186 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2187 int level
, int *slot
);
2188 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2189 int btrfs_previous_item(struct btrfs_root
*root
,
2190 struct btrfs_path
*path
, u64 min_objectid
,
2192 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2193 struct btrfs_root
*root
, struct btrfs_path
*path
,
2194 struct btrfs_key
*new_key
);
2195 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2196 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2197 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2198 struct btrfs_key
*key
, int lowest_level
,
2199 int cache_only
, u64 min_trans
);
2200 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2201 struct btrfs_key
*max_key
,
2202 struct btrfs_path
*path
, int cache_only
,
2204 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2205 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2206 struct extent_buffer
*parent
, int parent_slot
,
2207 struct extent_buffer
**cow_ret
);
2208 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2209 struct btrfs_root
*root
,
2210 struct extent_buffer
*buf
,
2211 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2212 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2213 struct extent_buffer
*buf
);
2214 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2215 *root
, struct btrfs_path
*path
, u32 data_size
);
2216 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2217 struct btrfs_root
*root
,
2218 struct btrfs_path
*path
,
2219 u32 new_size
, int from_end
);
2220 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2221 struct btrfs_root
*root
,
2222 struct btrfs_path
*path
,
2223 struct btrfs_key
*new_key
,
2224 unsigned long split_offset
);
2225 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2226 struct btrfs_root
*root
,
2227 struct btrfs_path
*path
,
2228 struct btrfs_key
*new_key
);
2229 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2230 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2232 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2233 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2234 int start_slot
, int cache_only
, u64
*last_ret
,
2235 struct btrfs_key
*progress
);
2236 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
2237 struct btrfs_path
*btrfs_alloc_path(void);
2238 void btrfs_free_path(struct btrfs_path
*p
);
2239 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2240 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2242 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2243 struct btrfs_path
*path
, int slot
, int nr
);
2244 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2245 struct btrfs_root
*root
,
2246 struct btrfs_path
*path
)
2248 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2251 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2252 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2253 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
2254 struct btrfs_root
*root
,
2255 struct btrfs_path
*path
,
2256 struct btrfs_key
*cpu_key
, u32
*data_size
,
2258 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2259 struct btrfs_root
*root
,
2260 struct btrfs_path
*path
,
2261 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2263 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2264 struct btrfs_root
*root
,
2265 struct btrfs_path
*path
,
2266 struct btrfs_key
*key
,
2269 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2272 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2273 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2274 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2275 int btrfs_drop_snapshot(struct btrfs_root
*root
,
2276 struct btrfs_block_rsv
*block_rsv
, int update_ref
);
2277 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2278 struct btrfs_root
*root
,
2279 struct extent_buffer
*node
,
2280 struct extent_buffer
*parent
);
2282 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2283 struct btrfs_path
*path
,
2284 u64 root_id
, u64 ref_id
);
2285 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2286 struct btrfs_root
*tree_root
,
2287 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2288 const char *name
, int name_len
);
2289 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2290 struct btrfs_root
*tree_root
,
2291 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2292 const char *name
, int name_len
);
2293 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2294 struct btrfs_key
*key
);
2295 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2296 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2298 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2299 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2301 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2302 btrfs_root_item
*item
, struct btrfs_key
*key
);
2303 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
2304 u64
*found_objectid
);
2305 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2306 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2307 int btrfs_set_root_node(struct btrfs_root_item
*item
,
2308 struct extent_buffer
*node
);
2310 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2311 struct btrfs_root
*root
, const char *name
,
2312 int name_len
, u64 dir
,
2313 struct btrfs_key
*location
, u8 type
, u64 index
);
2314 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2315 struct btrfs_root
*root
,
2316 struct btrfs_path
*path
, u64 dir
,
2317 const char *name
, int name_len
,
2319 struct btrfs_dir_item
*
2320 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2321 struct btrfs_root
*root
,
2322 struct btrfs_path
*path
, u64 dir
,
2323 u64 objectid
, const char *name
, int name_len
,
2325 struct btrfs_dir_item
*
2326 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2327 struct btrfs_path
*path
, u64 dirid
,
2328 const char *name
, int name_len
);
2329 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2330 struct btrfs_path
*path
,
2331 const char *name
, int name_len
);
2332 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2333 struct btrfs_root
*root
,
2334 struct btrfs_path
*path
,
2335 struct btrfs_dir_item
*di
);
2336 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2337 struct btrfs_root
*root
,
2338 struct btrfs_path
*path
, u64 objectid
,
2339 const char *name
, u16 name_len
,
2340 const void *data
, u16 data_len
);
2341 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2342 struct btrfs_root
*root
,
2343 struct btrfs_path
*path
, u64 dir
,
2344 const char *name
, u16 name_len
,
2348 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2349 struct btrfs_root
*root
, u64 offset
);
2350 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2351 struct btrfs_root
*root
, u64 offset
);
2352 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2355 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2356 struct btrfs_root
*fs_root
,
2357 u64 dirid
, u64
*objectid
);
2358 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2361 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2362 struct btrfs_root
*root
,
2363 const char *name
, int name_len
,
2364 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2365 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2366 struct btrfs_root
*root
,
2367 const char *name
, int name_len
,
2368 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2369 struct btrfs_inode_ref
*
2370 btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2371 struct btrfs_root
*root
,
2372 struct btrfs_path
*path
,
2373 const char *name
, int name_len
,
2374 u64 inode_objectid
, u64 ref_objectid
, int mod
);
2375 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2376 struct btrfs_root
*root
,
2377 struct btrfs_path
*path
, u64 objectid
);
2378 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2379 *root
, struct btrfs_path
*path
,
2380 struct btrfs_key
*location
, int mod
);
2383 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2384 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2385 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2386 struct bio
*bio
, u32
*dst
);
2387 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
2388 struct bio
*bio
, u64 logical_offset
, u32
*dst
);
2389 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2390 struct btrfs_root
*root
,
2391 u64 objectid
, u64 pos
,
2392 u64 disk_offset
, u64 disk_num_bytes
,
2393 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2394 u8 compression
, u8 encryption
, u16 other_encoding
);
2395 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2396 struct btrfs_root
*root
,
2397 struct btrfs_path
*path
, u64 objectid
,
2398 u64 bytenr
, int mod
);
2399 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2400 struct btrfs_root
*root
,
2401 struct btrfs_ordered_sum
*sums
);
2402 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2403 struct bio
*bio
, u64 file_start
, int contig
);
2404 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
2405 u64 start
, unsigned long len
);
2406 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2407 struct btrfs_root
*root
,
2408 struct btrfs_path
*path
,
2409 u64 bytenr
, int cow
);
2410 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2411 struct btrfs_root
*root
, struct btrfs_path
*path
,
2413 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
2414 u64 end
, struct list_head
*list
);
2417 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2418 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2419 #define ClearPageChecked ClearPageFsMisc
2420 #define SetPageChecked SetPageFsMisc
2421 #define PageChecked PageFsMisc
2424 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2425 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2426 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2427 struct btrfs_root
*root
,
2428 struct inode
*dir
, struct inode
*inode
,
2429 const char *name
, int name_len
);
2430 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2431 struct inode
*parent_inode
, struct inode
*inode
,
2432 const char *name
, int name_len
, int add_backref
, u64 index
);
2433 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2434 struct btrfs_root
*root
,
2435 struct inode
*dir
, u64 objectid
,
2436 const char *name
, int name_len
);
2437 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2438 struct btrfs_root
*root
,
2439 struct inode
*inode
, u64 new_size
,
2442 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2443 int btrfs_start_one_delalloc_inode(struct btrfs_root
*root
, int delay_iput
);
2444 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
2445 struct extent_state
**cached_state
);
2446 int btrfs_writepages(struct address_space
*mapping
,
2447 struct writeback_control
*wbc
);
2448 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2449 struct btrfs_root
*new_root
,
2450 u64 new_dirid
, u64 alloc_hint
);
2451 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2452 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2454 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2455 struct file_ra_state
*ra
, struct file
*file
,
2456 pgoff_t offset
, pgoff_t last_index
);
2457 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2458 int btrfs_readpage(struct file
*file
, struct page
*page
);
2459 void btrfs_evict_inode(struct inode
*inode
);
2460 void btrfs_put_inode(struct inode
*inode
);
2461 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
2462 void btrfs_dirty_inode(struct inode
*inode
);
2463 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2464 void btrfs_destroy_inode(struct inode
*inode
);
2465 int btrfs_drop_inode(struct inode
*inode
);
2466 int btrfs_init_cachep(void);
2467 void btrfs_destroy_cachep(void);
2468 long btrfs_ioctl_trans_end(struct file
*file
);
2469 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2470 struct btrfs_root
*root
, int *was_new
);
2471 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2472 unsigned from
, unsigned to
);
2473 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2474 size_t page_offset
, u64 start
, u64 end
,
2476 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2477 struct btrfs_root
*root
,
2478 struct inode
*inode
);
2479 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2480 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2481 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
2482 void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle
*trans
,
2483 struct btrfs_pending_snapshot
*pending
,
2484 u64
*bytes_to_reserve
);
2485 void btrfs_orphan_post_snapshot(struct btrfs_trans_handle
*trans
,
2486 struct btrfs_pending_snapshot
*pending
);
2487 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
2488 struct btrfs_root
*root
);
2489 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
2490 int btrfs_invalidate_inodes(struct btrfs_root
*root
);
2491 void btrfs_add_delayed_iput(struct inode
*inode
);
2492 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
2493 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
2494 u64 start
, u64 num_bytes
, u64 min_size
,
2495 loff_t actual_len
, u64
*alloc_hint
);
2496 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
2497 struct btrfs_trans_handle
*trans
, int mode
,
2498 u64 start
, u64 num_bytes
, u64 min_size
,
2499 loff_t actual_len
, u64
*alloc_hint
);
2500 extern const struct dentry_operations btrfs_dentry_operations
;
2503 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2504 void btrfs_update_iflags(struct inode
*inode
);
2505 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2508 int btrfs_sync_file(struct file
*file
, int datasync
);
2509 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2511 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2512 extern const struct file_operations btrfs_file_operations
;
2513 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
2514 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
2515 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2516 struct inode
*inode
, u64 start
, u64 end
);
2517 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2520 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2521 struct btrfs_root
*root
, int cache_only
);
2524 int btrfs_init_sysfs(void);
2525 void btrfs_exit_sysfs(void);
2526 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2527 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2528 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2529 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2532 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2535 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2536 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2539 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2540 int btrfs_check_acl(struct inode
*inode
, int mask
);
2542 #define btrfs_check_acl NULL
2544 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2545 struct inode
*inode
, struct inode
*dir
);
2546 int btrfs_acl_chmod(struct inode
*inode
);
2549 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
2550 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
2551 struct btrfs_root
*root
);
2552 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
2553 struct btrfs_root
*root
);
2554 int btrfs_recover_relocation(struct btrfs_root
*root
);
2555 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
2556 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
2557 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2558 struct extent_buffer
*cow
);
2559 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
2560 struct btrfs_pending_snapshot
*pending
,
2561 u64
*bytes_to_reserve
);
2562 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
2563 struct btrfs_pending_snapshot
*pending
);