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 <linux/kobject.h>
31 #include <asm/kmap_types.h>
32 #include "extent_io.h"
33 #include "extent_map.h"
34 #include "async-thread.h"
36 struct btrfs_trans_handle
;
37 struct btrfs_transaction
;
38 struct btrfs_pending_snapshot
;
39 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
40 extern struct kmem_cache
*btrfs_transaction_cachep
;
41 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
42 extern struct kmem_cache
*btrfs_path_cachep
;
43 extern struct kmem_cache
*btrfs_free_space_cachep
;
44 struct btrfs_ordered_sum
;
46 #define BTRFS_MAGIC "_BHRfS_M"
48 #define BTRFS_MAX_LEVEL 8
50 #define BTRFS_COMPAT_EXTENT_TREE_V0
53 * files bigger than this get some pre-flushing when they are added
54 * to the ordered operations list. That way we limit the total
55 * work done by the commit
57 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
59 /* holds pointers to all of the tree roots */
60 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
62 /* stores information about which extents are in use, and reference counts */
63 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
66 * chunk tree stores translations from logical -> physical block numbering
67 * the super block points to the chunk tree
69 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
72 * stores information about which areas of a given device are in use.
73 * one per device. The tree of tree roots points to the device tree
75 #define BTRFS_DEV_TREE_OBJECTID 4ULL
77 /* one per subvolume, storing files and directories */
78 #define BTRFS_FS_TREE_OBJECTID 5ULL
80 /* directory objectid inside the root tree */
81 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
83 /* holds checksums of all the data extents */
84 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
86 /* orhpan objectid for tracking unlinked/truncated files */
87 #define BTRFS_ORPHAN_OBJECTID -5ULL
89 /* does write ahead logging to speed up fsyncs */
90 #define BTRFS_TREE_LOG_OBJECTID -6ULL
91 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
93 /* for space balancing */
94 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
95 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
98 * extent checksums all have this objectid
99 * this allows them to share the logging tree
102 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
104 /* For storing free space cache */
105 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
107 /* dummy objectid represents multiple objectids */
108 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
111 * All files have objectids in this range.
113 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
114 #define BTRFS_LAST_FREE_OBJECTID -256ULL
115 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
119 * the device items go into the chunk tree. The key is in the form
120 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
122 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
124 #define BTRFS_BTREE_INODE_OBJECTID 1
126 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
129 * we can actually store much bigger names, but lets not confuse the rest
132 #define BTRFS_NAME_LEN 255
134 /* 32 bytes in various csum fields */
135 #define BTRFS_CSUM_SIZE 32
138 #define BTRFS_CSUM_TYPE_CRC32 0
140 static int btrfs_csum_sizes
[] = { 4, 0 };
142 /* four bytes for CRC32 */
143 #define BTRFS_EMPTY_DIR_SIZE 0
145 #define BTRFS_FT_UNKNOWN 0
146 #define BTRFS_FT_REG_FILE 1
147 #define BTRFS_FT_DIR 2
148 #define BTRFS_FT_CHRDEV 3
149 #define BTRFS_FT_BLKDEV 4
150 #define BTRFS_FT_FIFO 5
151 #define BTRFS_FT_SOCK 6
152 #define BTRFS_FT_SYMLINK 7
153 #define BTRFS_FT_XATTR 8
154 #define BTRFS_FT_MAX 9
157 * The key defines the order in the tree, and so it also defines (optimal)
160 * objectid corresponds to the inode number.
162 * type tells us things about the object, and is a kind of stream selector.
163 * so for a given inode, keys with type of 1 might refer to the inode data,
164 * type of 2 may point to file data in the btree and type == 3 may point to
167 * offset is the starting byte offset for this key in the stream.
169 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
170 * in cpu native order. Otherwise they are identical and their sizes
171 * should be the same (ie both packed)
173 struct btrfs_disk_key
{
177 } __attribute__ ((__packed__
));
183 } __attribute__ ((__packed__
));
185 struct btrfs_mapping_tree
{
186 struct extent_map_tree map_tree
;
189 #define BTRFS_UUID_SIZE 16
190 struct btrfs_dev_item
{
191 /* the internal btrfs device id */
194 /* size of the device */
200 /* optimal io alignment for this device */
203 /* optimal io width for this device */
206 /* minimal io size for this device */
209 /* type and info about this device */
212 /* expected generation for this device */
216 * starting byte of this partition on the device,
217 * to allow for stripe alignment in the future
221 /* grouping information for allocation decisions */
224 /* seek speed 0-100 where 100 is fastest */
227 /* bandwidth 0-100 where 100 is fastest */
230 /* btrfs generated uuid for this device */
231 u8 uuid
[BTRFS_UUID_SIZE
];
233 /* uuid of FS who owns this device */
234 u8 fsid
[BTRFS_UUID_SIZE
];
235 } __attribute__ ((__packed__
));
237 struct btrfs_stripe
{
240 u8 dev_uuid
[BTRFS_UUID_SIZE
];
241 } __attribute__ ((__packed__
));
244 /* size of this chunk in bytes */
247 /* objectid of the root referencing this chunk */
253 /* optimal io alignment for this chunk */
256 /* optimal io width for this chunk */
259 /* minimal io size for this chunk */
262 /* 2^16 stripes is quite a lot, a second limit is the size of a single
267 /* sub stripes only matter for raid10 */
269 struct btrfs_stripe stripe
;
270 /* additional stripes go here */
271 } __attribute__ ((__packed__
));
273 #define BTRFS_FREE_SPACE_EXTENT 1
274 #define BTRFS_FREE_SPACE_BITMAP 2
276 struct btrfs_free_space_entry
{
280 } __attribute__ ((__packed__
));
282 struct btrfs_free_space_header
{
283 struct btrfs_disk_key location
;
287 } __attribute__ ((__packed__
));
289 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
291 BUG_ON(num_stripes
== 0);
292 return sizeof(struct btrfs_chunk
) +
293 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
296 #define BTRFS_FSID_SIZE 16
297 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
298 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
304 /* Errors detected */
305 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
307 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
308 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
310 #define BTRFS_BACKREF_REV_MAX 256
311 #define BTRFS_BACKREF_REV_SHIFT 56
312 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
313 BTRFS_BACKREF_REV_SHIFT)
315 #define BTRFS_OLD_BACKREF_REV 0
316 #define BTRFS_MIXED_BACKREF_REV 1
319 * every tree block (leaf or node) starts with this header.
321 struct btrfs_header
{
322 /* these first four must match the super block */
323 u8 csum
[BTRFS_CSUM_SIZE
];
324 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
325 __le64 bytenr
; /* which block this node is supposed to live in */
328 /* allowed to be different from the super from here on down */
329 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
334 } __attribute__ ((__packed__
));
336 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
337 sizeof(struct btrfs_header)) / \
338 sizeof(struct btrfs_key_ptr))
339 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
340 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
341 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
342 sizeof(struct btrfs_item) - \
343 sizeof(struct btrfs_file_extent_item))
344 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
345 sizeof(struct btrfs_item) -\
346 sizeof(struct btrfs_dir_item))
350 * this is a very generous portion of the super block, giving us
351 * room to translate 14 chunks with 3 stripes each.
353 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
354 #define BTRFS_LABEL_SIZE 256
357 * the super block basically lists the main trees of the FS
358 * it currently lacks any block count etc etc
360 struct btrfs_super_block
{
361 u8 csum
[BTRFS_CSUM_SIZE
];
362 /* the first 4 fields must match struct btrfs_header */
363 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
364 __le64 bytenr
; /* this block number */
367 /* allowed to be different from the btrfs_header from here own down */
374 /* this will help find the new super based on the log root */
375 __le64 log_root_transid
;
378 __le64 root_dir_objectid
;
384 __le32 sys_chunk_array_size
;
385 __le64 chunk_root_generation
;
387 __le64 compat_ro_flags
;
388 __le64 incompat_flags
;
393 struct btrfs_dev_item dev_item
;
395 char label
[BTRFS_LABEL_SIZE
];
397 __le64 cache_generation
;
399 /* future expansion */
401 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
402 } __attribute__ ((__packed__
));
405 * Compat flags that we support. If any incompat flags are set other than the
406 * ones specified below then we will fail to mount
408 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
409 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
410 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
411 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
413 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
414 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
415 #define BTRFS_FEATURE_INCOMPAT_SUPP \
416 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
417 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
418 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
419 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
422 * A leaf is full of items. offset and size tell us where to find
423 * the item in the leaf (relative to the start of the data area)
426 struct btrfs_disk_key key
;
429 } __attribute__ ((__packed__
));
432 * leaves have an item area and a data area:
433 * [item0, item1....itemN] [free space] [dataN...data1, data0]
435 * The data is separate from the items to get the keys closer together
439 struct btrfs_header header
;
440 struct btrfs_item items
[];
441 } __attribute__ ((__packed__
));
444 * all non-leaf blocks are nodes, they hold only keys and pointers to
447 struct btrfs_key_ptr
{
448 struct btrfs_disk_key key
;
451 } __attribute__ ((__packed__
));
454 struct btrfs_header header
;
455 struct btrfs_key_ptr ptrs
[];
456 } __attribute__ ((__packed__
));
459 * btrfs_paths remember the path taken from the root down to the leaf.
460 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
461 * to any other levels that are present.
463 * The slots array records the index of the item or block pointer
464 * used while walking the tree.
467 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
468 int slots
[BTRFS_MAX_LEVEL
];
469 /* if there is real range locking, this locks field will change */
470 int locks
[BTRFS_MAX_LEVEL
];
472 /* keep some upper locks as we walk down */
476 * set by btrfs_split_item, tells search_slot to keep all locks
477 * and to force calls to keep space in the nodes
479 unsigned int search_for_split
:1;
480 unsigned int keep_locks
:1;
481 unsigned int skip_locking
:1;
482 unsigned int leave_spinning
:1;
483 unsigned int search_commit_root
:1;
487 * items in the extent btree are used to record the objectid of the
488 * owner of the block and the number of references
491 struct btrfs_extent_item
{
495 } __attribute__ ((__packed__
));
497 struct btrfs_extent_item_v0
{
499 } __attribute__ ((__packed__
));
501 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
502 sizeof(struct btrfs_item))
504 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
505 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
507 /* following flags only apply to tree blocks */
509 /* use full backrefs for extent pointers in the block */
510 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
512 struct btrfs_tree_block_info
{
513 struct btrfs_disk_key key
;
515 } __attribute__ ((__packed__
));
517 struct btrfs_extent_data_ref
{
522 } __attribute__ ((__packed__
));
524 struct btrfs_shared_data_ref
{
526 } __attribute__ ((__packed__
));
528 struct btrfs_extent_inline_ref
{
531 } __attribute__ ((__packed__
));
533 /* old style backrefs item */
534 struct btrfs_extent_ref_v0
{
539 } __attribute__ ((__packed__
));
542 /* dev extents record free space on individual devices. The owner
543 * field points back to the chunk allocation mapping tree that allocated
544 * the extent. The chunk tree uuid field is a way to double check the owner
546 struct btrfs_dev_extent
{
548 __le64 chunk_objectid
;
551 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
552 } __attribute__ ((__packed__
));
554 struct btrfs_inode_ref
{
558 } __attribute__ ((__packed__
));
560 struct btrfs_timespec
{
563 } __attribute__ ((__packed__
));
565 enum btrfs_compression_type
{
566 BTRFS_COMPRESS_NONE
= 0,
567 BTRFS_COMPRESS_ZLIB
= 1,
568 BTRFS_COMPRESS_LZO
= 2,
569 BTRFS_COMPRESS_TYPES
= 2,
570 BTRFS_COMPRESS_LAST
= 3,
573 struct btrfs_inode_item
{
574 /* nfs style generation number */
576 /* transid that last touched this inode */
588 /* modification sequence number for NFS */
592 * a little future expansion, for more than this we can
593 * just grow the inode item and version it
596 struct btrfs_timespec atime
;
597 struct btrfs_timespec ctime
;
598 struct btrfs_timespec mtime
;
599 struct btrfs_timespec otime
;
600 } __attribute__ ((__packed__
));
602 struct btrfs_dir_log_item
{
604 } __attribute__ ((__packed__
));
606 struct btrfs_dir_item
{
607 struct btrfs_disk_key location
;
612 } __attribute__ ((__packed__
));
614 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
616 struct btrfs_root_item
{
617 struct btrfs_inode_item inode
;
623 __le64 last_snapshot
;
626 struct btrfs_disk_key drop_progress
;
629 } __attribute__ ((__packed__
));
632 * this is used for both forward and backward root refs
634 struct btrfs_root_ref
{
638 } __attribute__ ((__packed__
));
640 #define BTRFS_FILE_EXTENT_INLINE 0
641 #define BTRFS_FILE_EXTENT_REG 1
642 #define BTRFS_FILE_EXTENT_PREALLOC 2
644 struct btrfs_file_extent_item
{
646 * transaction id that created this extent
650 * max number of bytes to hold this extent in ram
651 * when we split a compressed extent we can't know how big
652 * each of the resulting pieces will be. So, this is
653 * an upper limit on the size of the extent in ram instead of
659 * 32 bits for the various ways we might encode the data,
660 * including compression and encryption. If any of these
661 * are set to something a given disk format doesn't understand
662 * it is treated like an incompat flag for reading and writing,
667 __le16 other_encoding
; /* spare for later use */
669 /* are we inline data or a real extent? */
673 * disk space consumed by the extent, checksum blocks are included
677 __le64 disk_num_bytes
;
679 * the logical offset in file blocks (no csums)
680 * this extent record is for. This allows a file extent to point
681 * into the middle of an existing extent on disk, sharing it
682 * between two snapshots (useful if some bytes in the middle of the
683 * extent have changed
687 * the logical number of file blocks (no csums included). This
688 * always reflects the size uncompressed and without encoding.
692 } __attribute__ ((__packed__
));
694 struct btrfs_csum_item
{
696 } __attribute__ ((__packed__
));
698 /* different types of block groups (and chunks) */
699 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
700 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
701 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
702 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
703 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
704 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
705 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
706 #define BTRFS_NR_RAID_TYPES 5
708 struct btrfs_block_group_item
{
710 __le64 chunk_objectid
;
712 } __attribute__ ((__packed__
));
714 struct btrfs_space_info
{
717 u64 total_bytes
; /* total bytes in the space,
718 this doesn't take mirrors into account */
719 u64 bytes_used
; /* total bytes used,
720 this does't take mirrors into account */
721 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
722 transaction finishes */
723 u64 bytes_reserved
; /* total bytes the allocator has reserved for
724 current allocations */
725 u64 bytes_readonly
; /* total bytes that are read only */
727 u64 bytes_may_use
; /* number of bytes that may be used for
728 delalloc/allocations */
729 u64 disk_used
; /* total bytes used on disk */
730 u64 disk_total
; /* total bytes on disk, takes mirrors into
734 * we bump reservation progress every time we decrement
735 * bytes_reserved. This way people waiting for reservations
736 * know something good has happened and they can check
737 * for progress. The number here isn't to be trusted, it
738 * just shows reclaim activity
740 unsigned long reservation_progress
;
742 int full
; /* indicates that we cannot allocate any more
743 chunks for this space */
744 int force_alloc
; /* set if we need to force a chunk alloc for
747 struct list_head list
;
749 /* for block groups in our same type */
750 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
752 struct rw_semaphore groups_sem
;
753 atomic_t caching_threads
;
756 struct btrfs_block_rsv
{
760 struct btrfs_space_info
*space_info
;
761 struct list_head list
;
764 unsigned int priority
:8;
765 unsigned int durable
:1;
766 unsigned int refill_used
:1;
771 * free clusters are used to claim free space in relatively large chunks,
772 * allowing us to do less seeky writes. They are used for all metadata
773 * allocations and data allocations in ssd mode.
775 struct btrfs_free_cluster
{
777 spinlock_t refill_lock
;
780 /* largest extent in this cluster */
783 /* first extent starting offset */
786 struct btrfs_block_group_cache
*block_group
;
788 * when a cluster is allocated from a block group, we put the
789 * cluster onto a list in the block group so that it can
790 * be freed before the block group is freed.
792 struct list_head block_group_list
;
795 enum btrfs_caching_type
{
797 BTRFS_CACHE_STARTED
= 1,
798 BTRFS_CACHE_FINISHED
= 2,
801 enum btrfs_disk_cache_state
{
802 BTRFS_DC_WRITTEN
= 0,
806 BTRFS_DC_NEED_WRITE
= 4,
809 struct btrfs_caching_control
{
810 struct list_head list
;
812 wait_queue_head_t wait
;
813 struct btrfs_block_group_cache
*block_group
;
818 struct btrfs_block_group_cache
{
819 struct btrfs_key key
;
820 struct btrfs_block_group_item item
;
821 struct btrfs_fs_info
*fs_info
;
834 unsigned int dirty
:1;
837 int disk_cache_state
;
839 /* cache tracking stuff */
841 struct btrfs_caching_control
*caching_ctl
;
842 u64 last_byte_to_unpin
;
844 struct btrfs_space_info
*space_info
;
846 /* free space cache stuff */
847 spinlock_t tree_lock
;
848 struct rb_root free_space_offset
;
851 /* block group cache stuff */
852 struct rb_node cache_node
;
854 /* for block groups in the same raid type */
855 struct list_head list
;
860 /* List of struct btrfs_free_clusters for this block group.
861 * Today it will only have one thing on it, but that may change
863 struct list_head cluster_list
;
866 struct reloc_control
;
868 struct btrfs_fs_devices
;
869 struct btrfs_fs_info
{
870 u8 fsid
[BTRFS_FSID_SIZE
];
871 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
872 struct btrfs_root
*extent_root
;
873 struct btrfs_root
*tree_root
;
874 struct btrfs_root
*chunk_root
;
875 struct btrfs_root
*dev_root
;
876 struct btrfs_root
*fs_root
;
877 struct btrfs_root
*csum_root
;
879 /* the log root tree is a directory of all the other log roots */
880 struct btrfs_root
*log_root_tree
;
882 spinlock_t fs_roots_radix_lock
;
883 struct radix_tree_root fs_roots_radix
;
885 /* block group cache stuff */
886 spinlock_t block_group_cache_lock
;
887 struct rb_root block_group_cache_tree
;
889 struct extent_io_tree freed_extents
[2];
890 struct extent_io_tree
*pinned_extents
;
892 /* logical->physical extent mapping */
893 struct btrfs_mapping_tree mapping_tree
;
895 /* block reservation for extent, checksum and root tree */
896 struct btrfs_block_rsv global_block_rsv
;
897 /* block reservation for delay allocation */
898 struct btrfs_block_rsv delalloc_block_rsv
;
899 /* block reservation for metadata operations */
900 struct btrfs_block_rsv trans_block_rsv
;
901 /* block reservation for chunk tree */
902 struct btrfs_block_rsv chunk_block_rsv
;
904 struct btrfs_block_rsv empty_block_rsv
;
906 /* list of block reservations that cross multiple transactions */
907 struct list_head durable_block_rsv_list
;
909 struct mutex durable_block_rsv_mutex
;
912 u64 last_trans_committed
;
915 * this is updated to the current trans every time a full commit
916 * is required instead of the faster short fsync log commits
918 u64 last_trans_log_full_commit
;
919 u64 open_ioctl_trans
;
920 unsigned long mount_opt
:20;
921 unsigned long compress_type
:4;
924 struct btrfs_transaction
*running_transaction
;
925 wait_queue_head_t transaction_throttle
;
926 wait_queue_head_t transaction_wait
;
927 wait_queue_head_t transaction_blocked_wait
;
928 wait_queue_head_t async_submit_wait
;
930 struct btrfs_super_block super_copy
;
931 struct btrfs_super_block super_for_commit
;
932 struct block_device
*__bdev
;
933 struct super_block
*sb
;
934 struct inode
*btree_inode
;
935 struct backing_dev_info bdi
;
936 struct mutex trans_mutex
;
937 struct mutex tree_log_mutex
;
938 struct mutex transaction_kthread_mutex
;
939 struct mutex cleaner_mutex
;
940 struct mutex chunk_mutex
;
941 struct mutex volume_mutex
;
943 * this protects the ordered operations list only while we are
944 * processing all of the entries on it. This way we make
945 * sure the commit code doesn't find the list temporarily empty
946 * because another function happens to be doing non-waiting preflush
947 * before jumping into the main commit.
949 struct mutex ordered_operations_mutex
;
950 struct rw_semaphore extent_commit_sem
;
952 struct rw_semaphore cleanup_work_sem
;
954 struct rw_semaphore subvol_sem
;
955 struct srcu_struct subvol_srcu
;
957 struct list_head trans_list
;
958 struct list_head hashers
;
959 struct list_head dead_roots
;
960 struct list_head caching_block_groups
;
962 spinlock_t delayed_iput_lock
;
963 struct list_head delayed_iputs
;
965 atomic_t nr_async_submits
;
966 atomic_t async_submit_draining
;
967 atomic_t nr_async_bios
;
968 atomic_t async_delalloc_pages
;
971 * this is used by the balancing code to wait for all the pending
974 spinlock_t ordered_extent_lock
;
977 * all of the data=ordered extents pending writeback
978 * these can span multiple transactions and basically include
979 * every dirty data page that isn't from nodatacow
981 struct list_head ordered_extents
;
984 * all of the inodes that have delalloc bytes. It is possible for
985 * this list to be empty even when there is still dirty data=ordered
986 * extents waiting to finish IO.
988 struct list_head delalloc_inodes
;
991 * special rename and truncate targets that must be on disk before
992 * we're allowed to commit. This is basically the ext3 style
995 struct list_head ordered_operations
;
998 * there is a pool of worker threads for checksumming during writes
999 * and a pool for checksumming after reads. This is because readers
1000 * can run with FS locks held, and the writers may be waiting for
1001 * those locks. We don't want ordering in the pending list to cause
1002 * deadlocks, and so the two are serviced separately.
1004 * A third pool does submit_bio to avoid deadlocking with the other
1007 struct btrfs_workers generic_worker
;
1008 struct btrfs_workers workers
;
1009 struct btrfs_workers delalloc_workers
;
1010 struct btrfs_workers endio_workers
;
1011 struct btrfs_workers endio_meta_workers
;
1012 struct btrfs_workers endio_meta_write_workers
;
1013 struct btrfs_workers endio_write_workers
;
1014 struct btrfs_workers endio_freespace_worker
;
1015 struct btrfs_workers submit_workers
;
1017 * fixup workers take dirty pages that didn't properly go through
1018 * the cow mechanism and make them safe to write. It happens
1019 * for the sys_munmap function call path
1021 struct btrfs_workers fixup_workers
;
1022 struct task_struct
*transaction_kthread
;
1023 struct task_struct
*cleaner_kthread
;
1024 int thread_pool_size
;
1026 struct kobject super_kobj
;
1027 struct completion kobj_unregister
;
1030 int log_root_recovering
;
1035 /* protected by the delalloc lock, used to keep from writing
1036 * metadata until there is a nice batch
1038 u64 dirty_metadata_bytes
;
1039 struct list_head dirty_cowonly_roots
;
1041 struct btrfs_fs_devices
*fs_devices
;
1044 * the space_info list is almost entirely read only. It only changes
1045 * when we add a new raid type to the FS, and that happens
1046 * very rarely. RCU is used to protect it.
1048 struct list_head space_info
;
1050 struct reloc_control
*reloc_ctl
;
1052 spinlock_t delalloc_lock
;
1053 spinlock_t new_trans_lock
;
1056 /* data_alloc_cluster is only used in ssd mode */
1057 struct btrfs_free_cluster data_alloc_cluster
;
1059 /* all metadata allocations go through this cluster */
1060 struct btrfs_free_cluster meta_alloc_cluster
;
1062 spinlock_t ref_cache_lock
;
1063 u64 total_ref_cache_size
;
1065 u64 avail_data_alloc_bits
;
1066 u64 avail_metadata_alloc_bits
;
1067 u64 avail_system_alloc_bits
;
1068 u64 data_alloc_profile
;
1069 u64 metadata_alloc_profile
;
1070 u64 system_alloc_profile
;
1072 unsigned data_chunk_allocations
;
1073 unsigned metadata_ratio
;
1077 /* filesystem state */
1082 * in ram representation of the tree. extent_root is used for all allocations
1083 * and for the extent tree extent_root root.
1086 struct extent_buffer
*node
;
1088 /* the node lock is held while changing the node pointer */
1089 spinlock_t node_lock
;
1091 struct extent_buffer
*commit_root
;
1092 struct btrfs_root
*log_root
;
1093 struct btrfs_root
*reloc_root
;
1095 struct btrfs_root_item root_item
;
1096 struct btrfs_key root_key
;
1097 struct btrfs_fs_info
*fs_info
;
1098 struct extent_io_tree dirty_log_pages
;
1100 struct kobject root_kobj
;
1101 struct completion kobj_unregister
;
1102 struct mutex objectid_mutex
;
1104 spinlock_t accounting_lock
;
1105 struct btrfs_block_rsv
*block_rsv
;
1107 struct mutex log_mutex
;
1108 wait_queue_head_t log_writer_wait
;
1109 wait_queue_head_t log_commit_wait
[2];
1110 atomic_t log_writers
;
1111 atomic_t log_commit
[2];
1112 unsigned long log_transid
;
1113 unsigned long last_log_commit
;
1114 unsigned long log_batch
;
1115 pid_t log_start_pid
;
1116 bool log_multiple_pids
;
1121 /* data allocations are done in sectorsize units */
1124 /* node allocations are done in nodesize units */
1127 /* leaf allocations are done in leafsize units */
1134 u64 highest_objectid
;
1139 u64 defrag_trans_start
;
1140 struct btrfs_key defrag_progress
;
1141 struct btrfs_key defrag_max
;
1146 /* the dirty list is only used by non-reference counted roots */
1147 struct list_head dirty_list
;
1149 struct list_head root_list
;
1151 spinlock_t orphan_lock
;
1152 struct list_head orphan_list
;
1153 struct btrfs_block_rsv
*orphan_block_rsv
;
1154 int orphan_item_inserted
;
1155 int orphan_cleanup_state
;
1157 spinlock_t inode_lock
;
1158 /* red-black tree that keeps track of in-memory inodes */
1159 struct rb_root inode_tree
;
1162 * right now this just gets used so that a root has its own devid
1163 * for stat. It may be used for more later
1165 struct super_block anon_super
;
1169 * inode items have the data typically returned from stat and store other
1170 * info about object characteristics. There is one for every file and dir in
1173 #define BTRFS_INODE_ITEM_KEY 1
1174 #define BTRFS_INODE_REF_KEY 12
1175 #define BTRFS_XATTR_ITEM_KEY 24
1176 #define BTRFS_ORPHAN_ITEM_KEY 48
1177 /* reserve 2-15 close to the inode for later flexibility */
1180 * dir items are the name -> inode pointers in a directory. There is one
1181 * for every name in a directory.
1183 #define BTRFS_DIR_LOG_ITEM_KEY 60
1184 #define BTRFS_DIR_LOG_INDEX_KEY 72
1185 #define BTRFS_DIR_ITEM_KEY 84
1186 #define BTRFS_DIR_INDEX_KEY 96
1188 * extent data is for file data
1190 #define BTRFS_EXTENT_DATA_KEY 108
1193 * extent csums are stored in a separate tree and hold csums for
1194 * an entire extent on disk.
1196 #define BTRFS_EXTENT_CSUM_KEY 128
1199 * root items point to tree roots. They are typically in the root
1200 * tree used by the super block to find all the other trees
1202 #define BTRFS_ROOT_ITEM_KEY 132
1205 * root backrefs tie subvols and snapshots to the directory entries that
1208 #define BTRFS_ROOT_BACKREF_KEY 144
1211 * root refs make a fast index for listing all of the snapshots and
1212 * subvolumes referenced by a given root. They point directly to the
1213 * directory item in the root that references the subvol
1215 #define BTRFS_ROOT_REF_KEY 156
1218 * extent items are in the extent map tree. These record which blocks
1219 * are used, and how many references there are to each block
1221 #define BTRFS_EXTENT_ITEM_KEY 168
1223 #define BTRFS_TREE_BLOCK_REF_KEY 176
1225 #define BTRFS_EXTENT_DATA_REF_KEY 178
1227 #define BTRFS_EXTENT_REF_V0_KEY 180
1229 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1231 #define BTRFS_SHARED_DATA_REF_KEY 184
1234 * block groups give us hints into the extent allocation trees. Which
1235 * blocks are free etc etc
1237 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1239 #define BTRFS_DEV_EXTENT_KEY 204
1240 #define BTRFS_DEV_ITEM_KEY 216
1241 #define BTRFS_CHUNK_ITEM_KEY 228
1244 * string items are for debugging. They just store a short string of
1247 #define BTRFS_STRING_ITEM_KEY 253
1249 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1250 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1251 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1252 #define BTRFS_MOUNT_SSD (1 << 3)
1253 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1254 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1255 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1256 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1257 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1258 #define BTRFS_MOUNT_NOSSD (1 << 9)
1259 #define BTRFS_MOUNT_DISCARD (1 << 10)
1260 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1261 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1262 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1263 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1264 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1266 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1267 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1268 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1273 #define BTRFS_INODE_NODATASUM (1 << 0)
1274 #define BTRFS_INODE_NODATACOW (1 << 1)
1275 #define BTRFS_INODE_READONLY (1 << 2)
1276 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1277 #define BTRFS_INODE_PREALLOC (1 << 4)
1278 #define BTRFS_INODE_SYNC (1 << 5)
1279 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1280 #define BTRFS_INODE_APPEND (1 << 7)
1281 #define BTRFS_INODE_NODUMP (1 << 8)
1282 #define BTRFS_INODE_NOATIME (1 << 9)
1283 #define BTRFS_INODE_DIRSYNC (1 << 10)
1285 /* some macros to generate set/get funcs for the struct fields. This
1286 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1289 #define le8_to_cpu(v) (v)
1290 #define cpu_to_le8(v) (v)
1293 #define read_eb_member(eb, ptr, type, member, result) ( \
1294 read_extent_buffer(eb, (char *)(result), \
1295 ((unsigned long)(ptr)) + \
1296 offsetof(type, member), \
1297 sizeof(((type *)0)->member)))
1299 #define write_eb_member(eb, ptr, type, member, result) ( \
1300 write_extent_buffer(eb, (char *)(result), \
1301 ((unsigned long)(ptr)) + \
1302 offsetof(type, member), \
1303 sizeof(((type *)0)->member)))
1305 #ifndef BTRFS_SETGET_FUNCS
1306 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1307 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1308 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1311 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1312 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1314 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1315 u##bits res = le##bits##_to_cpu(p->member); \
1316 kunmap_atomic(p, KM_USER0); \
1319 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1322 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1323 p->member = cpu_to_le##bits(val); \
1324 kunmap_atomic(p, KM_USER0); \
1327 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1328 static inline u##bits btrfs_##name(type *s) \
1330 return le##bits##_to_cpu(s->member); \
1332 static inline void btrfs_set_##name(type *s, u##bits val) \
1334 s->member = cpu_to_le##bits(val); \
1337 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1338 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1339 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1340 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1341 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1342 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1344 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1345 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1346 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1347 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1348 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1349 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1351 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1352 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1354 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1356 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1358 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1360 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1362 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1363 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1365 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1367 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1369 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1372 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1374 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1377 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1379 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1382 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1383 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1384 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1385 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1386 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1387 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1388 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1389 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1390 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1391 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1392 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1394 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1396 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1399 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1400 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1401 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1403 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1405 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1407 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1409 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1410 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1412 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1414 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1415 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1417 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1420 unsigned long offset
= (unsigned long)c
;
1421 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1422 offset
+= nr
* sizeof(struct btrfs_stripe
);
1423 return (struct btrfs_stripe
*)offset
;
1426 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1428 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1431 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1432 struct btrfs_chunk
*c
, int nr
)
1434 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1437 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1438 struct btrfs_chunk
*c
, int nr
,
1441 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1444 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1445 struct btrfs_chunk
*c
, int nr
)
1447 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1450 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1451 struct btrfs_chunk
*c
, int nr
,
1454 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1457 /* struct btrfs_block_group_item */
1458 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1460 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1462 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1463 struct btrfs_block_group_item
, chunk_objectid
, 64);
1465 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1466 struct btrfs_block_group_item
, chunk_objectid
, 64);
1467 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1468 struct btrfs_block_group_item
, flags
, 64);
1469 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1470 struct btrfs_block_group_item
, flags
, 64);
1472 /* struct btrfs_inode_ref */
1473 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1474 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1476 /* struct btrfs_inode_item */
1477 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1478 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1479 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1480 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1481 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1482 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1483 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1484 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1485 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1486 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1487 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1488 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1490 static inline struct btrfs_timespec
*
1491 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1493 unsigned long ptr
= (unsigned long)inode_item
;
1494 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1495 return (struct btrfs_timespec
*)ptr
;
1498 static inline struct btrfs_timespec
*
1499 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1501 unsigned long ptr
= (unsigned long)inode_item
;
1502 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1503 return (struct btrfs_timespec
*)ptr
;
1506 static inline struct btrfs_timespec
*
1507 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1509 unsigned long ptr
= (unsigned long)inode_item
;
1510 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1511 return (struct btrfs_timespec
*)ptr
;
1514 static inline struct btrfs_timespec
*
1515 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1517 unsigned long ptr
= (unsigned long)inode_item
;
1518 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1519 return (struct btrfs_timespec
*)ptr
;
1522 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1523 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1525 /* struct btrfs_dev_extent */
1526 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1528 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1529 chunk_objectid
, 64);
1530 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1532 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1534 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1536 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1537 return (u8
*)((unsigned long)dev
+ ptr
);
1540 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1541 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1543 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1545 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1548 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1550 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1551 struct btrfs_tree_block_info
*item
,
1552 struct btrfs_disk_key
*key
)
1554 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1557 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1558 struct btrfs_tree_block_info
*item
,
1559 struct btrfs_disk_key
*key
)
1561 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1564 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1566 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1568 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1570 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1573 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1576 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1578 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1581 static inline u32
btrfs_extent_inline_ref_size(int type
)
1583 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1584 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1585 return sizeof(struct btrfs_extent_inline_ref
);
1586 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1587 return sizeof(struct btrfs_shared_data_ref
) +
1588 sizeof(struct btrfs_extent_inline_ref
);
1589 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1590 return sizeof(struct btrfs_extent_data_ref
) +
1591 offsetof(struct btrfs_extent_inline_ref
, offset
);
1596 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1597 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1599 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1600 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1602 /* struct btrfs_node */
1603 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1604 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1606 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1609 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1610 sizeof(struct btrfs_key_ptr
) * nr
;
1611 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1614 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1618 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1619 sizeof(struct btrfs_key_ptr
) * nr
;
1620 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1623 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1626 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1627 sizeof(struct btrfs_key_ptr
) * nr
;
1628 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1631 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1635 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1636 sizeof(struct btrfs_key_ptr
) * nr
;
1637 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1640 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1642 return offsetof(struct btrfs_node
, ptrs
) +
1643 sizeof(struct btrfs_key_ptr
) * nr
;
1646 void btrfs_node_key(struct extent_buffer
*eb
,
1647 struct btrfs_disk_key
*disk_key
, int nr
);
1649 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1650 struct btrfs_disk_key
*disk_key
, int nr
)
1653 ptr
= btrfs_node_key_ptr_offset(nr
);
1654 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1655 struct btrfs_key_ptr
, key
, disk_key
);
1658 /* struct btrfs_item */
1659 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1660 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1662 static inline unsigned long btrfs_item_nr_offset(int nr
)
1664 return offsetof(struct btrfs_leaf
, items
) +
1665 sizeof(struct btrfs_item
) * nr
;
1668 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1671 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1674 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1675 struct btrfs_item
*item
)
1677 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1680 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1682 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1685 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1687 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1690 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1692 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1695 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1696 struct btrfs_disk_key
*disk_key
, int nr
)
1698 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1699 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1702 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1703 struct btrfs_disk_key
*disk_key
, int nr
)
1705 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1706 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1709 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1712 * struct btrfs_root_ref
1714 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1715 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1716 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1718 /* struct btrfs_dir_item */
1719 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1720 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1721 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1722 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1724 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1725 struct btrfs_dir_item
*item
,
1726 struct btrfs_disk_key
*key
)
1728 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1731 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1732 struct btrfs_dir_item
*item
,
1733 struct btrfs_disk_key
*key
)
1735 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1738 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1740 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1742 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1745 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1746 struct btrfs_free_space_header
*h
,
1747 struct btrfs_disk_key
*key
)
1749 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1752 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1753 struct btrfs_free_space_header
*h
,
1754 struct btrfs_disk_key
*key
)
1756 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1759 /* struct btrfs_disk_key */
1760 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1762 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1763 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1765 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1766 struct btrfs_disk_key
*disk
)
1768 cpu
->offset
= le64_to_cpu(disk
->offset
);
1769 cpu
->type
= disk
->type
;
1770 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1773 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1774 struct btrfs_key
*cpu
)
1776 disk
->offset
= cpu_to_le64(cpu
->offset
);
1777 disk
->type
= cpu
->type
;
1778 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1781 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1782 struct btrfs_key
*key
, int nr
)
1784 struct btrfs_disk_key disk_key
;
1785 btrfs_node_key(eb
, &disk_key
, nr
);
1786 btrfs_disk_key_to_cpu(key
, &disk_key
);
1789 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1790 struct btrfs_key
*key
, int nr
)
1792 struct btrfs_disk_key disk_key
;
1793 btrfs_item_key(eb
, &disk_key
, nr
);
1794 btrfs_disk_key_to_cpu(key
, &disk_key
);
1797 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1798 struct btrfs_dir_item
*item
,
1799 struct btrfs_key
*key
)
1801 struct btrfs_disk_key disk_key
;
1802 btrfs_dir_item_key(eb
, item
, &disk_key
);
1803 btrfs_disk_key_to_cpu(key
, &disk_key
);
1807 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1812 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1817 /* struct btrfs_header */
1818 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1819 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1821 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1822 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1823 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1824 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1826 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1828 return (btrfs_header_flags(eb
) & flag
) == flag
;
1831 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1833 u64 flags
= btrfs_header_flags(eb
);
1834 btrfs_set_header_flags(eb
, flags
| flag
);
1835 return (flags
& flag
) == flag
;
1838 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1840 u64 flags
= btrfs_header_flags(eb
);
1841 btrfs_set_header_flags(eb
, flags
& ~flag
);
1842 return (flags
& flag
) == flag
;
1845 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1847 u64 flags
= btrfs_header_flags(eb
);
1848 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1851 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1854 u64 flags
= btrfs_header_flags(eb
);
1855 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1856 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1857 btrfs_set_header_flags(eb
, flags
);
1860 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1862 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1866 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1868 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1872 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1874 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1878 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1880 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1884 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1889 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1894 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1899 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1901 return btrfs_header_level(eb
) == 0;
1904 /* struct btrfs_root_item */
1905 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1907 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1908 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1909 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1911 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1913 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1914 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1915 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1916 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1917 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1918 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1919 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1920 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1923 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
1925 return root
->root_item
.flags
& BTRFS_ROOT_SUBVOL_RDONLY
;
1928 /* struct btrfs_super_block */
1930 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1931 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1932 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1934 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1935 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1936 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1937 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1938 struct btrfs_super_block
, chunk_root_generation
, 64);
1939 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1941 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1943 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1944 chunk_root_level
, 8);
1945 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1947 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1948 log_root_transid
, 64);
1949 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1951 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1953 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1955 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1957 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1959 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1961 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1963 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1964 root_dir_objectid
, 64);
1965 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1967 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1969 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1970 compat_ro_flags
, 64);
1971 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1972 incompat_flags
, 64);
1973 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1975 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
1976 cache_generation
, 64);
1978 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1980 int t
= btrfs_super_csum_type(s
);
1981 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1982 return btrfs_csum_sizes
[t
];
1985 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1987 return offsetof(struct btrfs_leaf
, items
);
1990 /* struct btrfs_file_extent_item */
1991 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1993 static inline unsigned long
1994 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
1996 unsigned long offset
= (unsigned long)e
;
1997 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2001 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2003 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2006 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2008 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2010 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2011 disk_num_bytes
, 64);
2012 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2014 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2016 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2018 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2020 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2022 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2023 other_encoding
, 16);
2025 /* this returns the number of file bytes represented by the inline item.
2026 * If an item is compressed, this is the uncompressed size
2028 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2029 struct btrfs_file_extent_item
*e
)
2031 return btrfs_file_extent_ram_bytes(eb
, e
);
2035 * this returns the number of bytes used by the item on disk, minus the
2036 * size of any extent headers. If a file is compressed on disk, this is
2037 * the compressed size
2039 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2040 struct btrfs_item
*e
)
2042 unsigned long offset
;
2043 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2044 return btrfs_item_size(eb
, e
) - offset
;
2047 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
2049 return sb
->s_fs_info
;
2052 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
2053 const char *name
, int len
)
2055 /* if we already have a name just free it */
2058 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
2062 memcpy(root
->name
, name
, len
);
2063 root
->name
[len
] = '\0';
2068 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2071 return root
->leafsize
;
2072 return root
->nodesize
;
2075 /* helper function to cast into the data area of the leaf. */
2076 #define btrfs_item_ptr(leaf, slot, type) \
2077 ((type *)(btrfs_leaf_data(leaf) + \
2078 btrfs_item_offset_nr(leaf, slot)))
2080 #define btrfs_item_ptr_offset(leaf, slot) \
2081 ((unsigned long)(btrfs_leaf_data(leaf) + \
2082 btrfs_item_offset_nr(leaf, slot)))
2084 static inline struct dentry
*fdentry(struct file
*file
)
2086 return file
->f_path
.dentry
;
2089 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2091 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2092 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2096 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2097 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2098 struct btrfs_root
*root
, unsigned long count
);
2099 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2100 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2101 struct btrfs_root
*root
, u64 bytenr
,
2102 u64 num_bytes
, u64
*refs
, u64
*flags
);
2103 int btrfs_pin_extent(struct btrfs_root
*root
,
2104 u64 bytenr
, u64 num
, int reserved
);
2105 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
2106 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2107 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2108 struct btrfs_root
*root
,
2109 u64 objectid
, u64 offset
, u64 bytenr
);
2110 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
2111 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2112 struct btrfs_fs_info
*info
,
2114 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2115 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2116 u64 search_start
, u64 search_hint
, int owner
);
2117 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2118 struct btrfs_root
*root
, u32 blocksize
,
2119 u64 parent
, u64 root_objectid
,
2120 struct btrfs_disk_key
*key
, int level
,
2121 u64 hint
, u64 empty_size
);
2122 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2123 struct btrfs_root
*root
,
2124 struct extent_buffer
*buf
,
2125 u64 parent
, int last_ref
);
2126 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2127 struct btrfs_root
*root
,
2128 u64 bytenr
, u32 blocksize
,
2130 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2131 struct btrfs_root
*root
,
2132 u64 root_objectid
, u64 owner
,
2133 u64 offset
, struct btrfs_key
*ins
);
2134 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2135 struct btrfs_root
*root
,
2136 u64 root_objectid
, u64 owner
, u64 offset
,
2137 struct btrfs_key
*ins
);
2138 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2139 struct btrfs_root
*root
,
2140 u64 num_bytes
, u64 min_alloc_size
,
2141 u64 empty_size
, u64 hint_byte
,
2142 u64 search_end
, struct btrfs_key
*ins
,
2144 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2145 struct extent_buffer
*buf
, int full_backref
);
2146 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2147 struct extent_buffer
*buf
, int full_backref
);
2148 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2149 struct btrfs_root
*root
,
2150 u64 bytenr
, u64 num_bytes
, u64 flags
,
2152 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2153 struct btrfs_root
*root
,
2154 u64 bytenr
, u64 num_bytes
, u64 parent
,
2155 u64 root_objectid
, u64 owner
, u64 offset
);
2157 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2158 int btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2159 struct btrfs_root
*root
);
2160 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2161 struct btrfs_root
*root
);
2162 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2163 struct btrfs_root
*root
,
2164 u64 bytenr
, u64 num_bytes
, u64 parent
,
2165 u64 root_objectid
, u64 owner
, u64 offset
);
2167 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2168 struct btrfs_root
*root
);
2169 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2170 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2171 int btrfs_read_block_groups(struct btrfs_root
*root
);
2172 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2173 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2174 struct btrfs_root
*root
, u64 bytes_used
,
2175 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2177 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2178 struct btrfs_root
*root
, u64 group_start
);
2179 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2180 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2181 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2182 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2183 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
2184 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
2185 int btrfs_trans_reserve_metadata(struct btrfs_trans_handle
*trans
,
2186 struct btrfs_root
*root
,
2188 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2189 struct btrfs_root
*root
);
2190 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2191 struct inode
*inode
);
2192 void btrfs_orphan_release_metadata(struct inode
*inode
);
2193 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
2194 struct btrfs_pending_snapshot
*pending
);
2195 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2196 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2197 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
2198 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
2199 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2200 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2201 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2202 struct btrfs_block_rsv
*rsv
);
2203 void btrfs_add_durable_block_rsv(struct btrfs_fs_info
*fs_info
,
2204 struct btrfs_block_rsv
*rsv
);
2205 int btrfs_block_rsv_add(struct btrfs_trans_handle
*trans
,
2206 struct btrfs_root
*root
,
2207 struct btrfs_block_rsv
*block_rsv
,
2209 int btrfs_block_rsv_check(struct btrfs_trans_handle
*trans
,
2210 struct btrfs_root
*root
,
2211 struct btrfs_block_rsv
*block_rsv
,
2212 u64 min_reserved
, int min_factor
);
2213 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2214 struct btrfs_block_rsv
*dst_rsv
,
2216 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2217 struct btrfs_block_rsv
*block_rsv
,
2219 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2220 struct btrfs_block_group_cache
*cache
);
2221 int btrfs_set_block_group_rw(struct btrfs_root
*root
,
2222 struct btrfs_block_group_cache
*cache
);
2223 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2224 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2225 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2226 u64 start
, u64 end
);
2227 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2229 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2230 struct btrfs_root
*root
, u64 type
);
2233 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2234 int level
, int *slot
);
2235 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2236 int btrfs_previous_item(struct btrfs_root
*root
,
2237 struct btrfs_path
*path
, u64 min_objectid
,
2239 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2240 struct btrfs_root
*root
, struct btrfs_path
*path
,
2241 struct btrfs_key
*new_key
);
2242 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2243 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2244 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2245 struct btrfs_key
*key
, int lowest_level
,
2246 int cache_only
, u64 min_trans
);
2247 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2248 struct btrfs_key
*max_key
,
2249 struct btrfs_path
*path
, int cache_only
,
2251 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2252 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2253 struct extent_buffer
*parent
, int parent_slot
,
2254 struct extent_buffer
**cow_ret
);
2255 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2256 struct btrfs_root
*root
,
2257 struct extent_buffer
*buf
,
2258 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2259 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2260 struct extent_buffer
*buf
);
2261 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2262 *root
, struct btrfs_path
*path
, u32 data_size
);
2263 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2264 struct btrfs_root
*root
,
2265 struct btrfs_path
*path
,
2266 u32 new_size
, int from_end
);
2267 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2268 struct btrfs_root
*root
,
2269 struct btrfs_path
*path
,
2270 struct btrfs_key
*new_key
,
2271 unsigned long split_offset
);
2272 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2273 struct btrfs_root
*root
,
2274 struct btrfs_path
*path
,
2275 struct btrfs_key
*new_key
);
2276 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2277 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2279 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2280 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2281 int start_slot
, int cache_only
, u64
*last_ret
,
2282 struct btrfs_key
*progress
);
2283 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
2284 struct btrfs_path
*btrfs_alloc_path(void);
2285 void btrfs_free_path(struct btrfs_path
*p
);
2286 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2287 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2289 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2290 struct btrfs_path
*path
, int slot
, int nr
);
2291 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2292 struct btrfs_root
*root
,
2293 struct btrfs_path
*path
)
2295 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2298 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2299 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2300 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
2301 struct btrfs_root
*root
,
2302 struct btrfs_path
*path
,
2303 struct btrfs_key
*cpu_key
, u32
*data_size
,
2305 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2306 struct btrfs_root
*root
,
2307 struct btrfs_path
*path
,
2308 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2310 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2311 struct btrfs_root
*root
,
2312 struct btrfs_path
*path
,
2313 struct btrfs_key
*key
,
2316 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2319 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2320 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2321 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2322 int btrfs_drop_snapshot(struct btrfs_root
*root
,
2323 struct btrfs_block_rsv
*block_rsv
, int update_ref
);
2324 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2325 struct btrfs_root
*root
,
2326 struct extent_buffer
*node
,
2327 struct extent_buffer
*parent
);
2329 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2330 struct btrfs_path
*path
,
2331 u64 root_id
, u64 ref_id
);
2332 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2333 struct btrfs_root
*tree_root
,
2334 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2335 const char *name
, int name_len
);
2336 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2337 struct btrfs_root
*tree_root
,
2338 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2339 const char *name
, int name_len
);
2340 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2341 struct btrfs_key
*key
);
2342 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2343 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2345 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2346 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2348 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2349 btrfs_root_item
*item
, struct btrfs_key
*key
);
2350 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
2351 u64
*found_objectid
);
2352 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2353 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2354 int btrfs_set_root_node(struct btrfs_root_item
*item
,
2355 struct extent_buffer
*node
);
2357 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2358 struct btrfs_root
*root
, const char *name
,
2359 int name_len
, u64 dir
,
2360 struct btrfs_key
*location
, u8 type
, u64 index
);
2361 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2362 struct btrfs_root
*root
,
2363 struct btrfs_path
*path
, u64 dir
,
2364 const char *name
, int name_len
,
2366 struct btrfs_dir_item
*
2367 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2368 struct btrfs_root
*root
,
2369 struct btrfs_path
*path
, u64 dir
,
2370 u64 objectid
, const char *name
, int name_len
,
2372 struct btrfs_dir_item
*
2373 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2374 struct btrfs_path
*path
, u64 dirid
,
2375 const char *name
, int name_len
);
2376 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2377 struct btrfs_path
*path
,
2378 const char *name
, int name_len
);
2379 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2380 struct btrfs_root
*root
,
2381 struct btrfs_path
*path
,
2382 struct btrfs_dir_item
*di
);
2383 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2384 struct btrfs_root
*root
,
2385 struct btrfs_path
*path
, u64 objectid
,
2386 const char *name
, u16 name_len
,
2387 const void *data
, u16 data_len
);
2388 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2389 struct btrfs_root
*root
,
2390 struct btrfs_path
*path
, u64 dir
,
2391 const char *name
, u16 name_len
,
2393 int verify_dir_item(struct btrfs_root
*root
,
2394 struct extent_buffer
*leaf
,
2395 struct btrfs_dir_item
*dir_item
);
2398 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2399 struct btrfs_root
*root
, u64 offset
);
2400 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2401 struct btrfs_root
*root
, u64 offset
);
2402 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2405 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2406 struct btrfs_root
*fs_root
,
2407 u64 dirid
, u64
*objectid
);
2408 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2411 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2412 struct btrfs_root
*root
,
2413 const char *name
, int name_len
,
2414 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2415 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2416 struct btrfs_root
*root
,
2417 const char *name
, int name_len
,
2418 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2419 struct btrfs_inode_ref
*
2420 btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2421 struct btrfs_root
*root
,
2422 struct btrfs_path
*path
,
2423 const char *name
, int name_len
,
2424 u64 inode_objectid
, u64 ref_objectid
, int mod
);
2425 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2426 struct btrfs_root
*root
,
2427 struct btrfs_path
*path
, u64 objectid
);
2428 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2429 *root
, struct btrfs_path
*path
,
2430 struct btrfs_key
*location
, int mod
);
2433 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2434 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2435 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2436 struct bio
*bio
, u32
*dst
);
2437 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
2438 struct bio
*bio
, u64 logical_offset
, u32
*dst
);
2439 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2440 struct btrfs_root
*root
,
2441 u64 objectid
, u64 pos
,
2442 u64 disk_offset
, u64 disk_num_bytes
,
2443 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2444 u8 compression
, u8 encryption
, u16 other_encoding
);
2445 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2446 struct btrfs_root
*root
,
2447 struct btrfs_path
*path
, u64 objectid
,
2448 u64 bytenr
, int mod
);
2449 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2450 struct btrfs_root
*root
,
2451 struct btrfs_ordered_sum
*sums
);
2452 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2453 struct bio
*bio
, u64 file_start
, int contig
);
2454 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
2455 u64 start
, unsigned long len
);
2456 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2457 struct btrfs_root
*root
,
2458 struct btrfs_path
*path
,
2459 u64 bytenr
, int cow
);
2460 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2461 struct btrfs_root
*root
, struct btrfs_path
*path
,
2463 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
2464 u64 end
, struct list_head
*list
);
2467 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2468 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2469 #define ClearPageChecked ClearPageFsMisc
2470 #define SetPageChecked SetPageFsMisc
2471 #define PageChecked PageFsMisc
2474 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2475 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2476 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2477 struct btrfs_root
*root
,
2478 struct inode
*dir
, struct inode
*inode
,
2479 const char *name
, int name_len
);
2480 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2481 struct inode
*parent_inode
, struct inode
*inode
,
2482 const char *name
, int name_len
, int add_backref
, u64 index
);
2483 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2484 struct btrfs_root
*root
,
2485 struct inode
*dir
, u64 objectid
,
2486 const char *name
, int name_len
);
2487 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2488 struct btrfs_root
*root
,
2489 struct inode
*inode
, u64 new_size
,
2492 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2493 int btrfs_start_one_delalloc_inode(struct btrfs_root
*root
, int delay_iput
,
2495 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
2496 struct extent_state
**cached_state
);
2497 int btrfs_writepages(struct address_space
*mapping
,
2498 struct writeback_control
*wbc
);
2499 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2500 struct btrfs_root
*new_root
,
2501 u64 new_dirid
, u64 alloc_hint
);
2502 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2503 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2505 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2506 struct file_ra_state
*ra
, struct file
*file
,
2507 pgoff_t offset
, pgoff_t last_index
);
2508 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2509 int btrfs_readpage(struct file
*file
, struct page
*page
);
2510 void btrfs_evict_inode(struct inode
*inode
);
2511 void btrfs_put_inode(struct inode
*inode
);
2512 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
2513 void btrfs_dirty_inode(struct inode
*inode
);
2514 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2515 void btrfs_destroy_inode(struct inode
*inode
);
2516 int btrfs_drop_inode(struct inode
*inode
);
2517 int btrfs_init_cachep(void);
2518 void btrfs_destroy_cachep(void);
2519 long btrfs_ioctl_trans_end(struct file
*file
);
2520 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2521 struct btrfs_root
*root
, int *was_new
);
2522 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2523 unsigned from
, unsigned to
);
2524 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2525 size_t page_offset
, u64 start
, u64 end
,
2527 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2528 struct btrfs_root
*root
,
2529 struct inode
*inode
);
2530 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2531 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2532 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
2533 void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle
*trans
,
2534 struct btrfs_pending_snapshot
*pending
,
2535 u64
*bytes_to_reserve
);
2536 void btrfs_orphan_post_snapshot(struct btrfs_trans_handle
*trans
,
2537 struct btrfs_pending_snapshot
*pending
);
2538 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
2539 struct btrfs_root
*root
);
2540 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
2541 int btrfs_invalidate_inodes(struct btrfs_root
*root
);
2542 void btrfs_add_delayed_iput(struct inode
*inode
);
2543 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
2544 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
2545 u64 start
, u64 num_bytes
, u64 min_size
,
2546 loff_t actual_len
, u64
*alloc_hint
);
2547 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
2548 struct btrfs_trans_handle
*trans
, int mode
,
2549 u64 start
, u64 num_bytes
, u64 min_size
,
2550 loff_t actual_len
, u64
*alloc_hint
);
2551 extern const struct dentry_operations btrfs_dentry_operations
;
2554 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2555 void btrfs_update_iflags(struct inode
*inode
);
2556 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2559 int btrfs_sync_file(struct file
*file
, int datasync
);
2560 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2562 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2563 extern const struct file_operations btrfs_file_operations
;
2564 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
2565 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
2566 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2567 struct inode
*inode
, u64 start
, u64 end
);
2568 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2571 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2572 struct btrfs_root
*root
, int cache_only
);
2575 int btrfs_init_sysfs(void);
2576 void btrfs_exit_sysfs(void);
2577 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2578 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2579 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2580 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2583 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2586 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2587 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2588 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
2589 unsigned int line
, int errno
);
2591 #define btrfs_std_error(fs_info, errno) \
2594 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2598 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2599 int btrfs_check_acl(struct inode
*inode
, int mask
, unsigned int flags
);
2601 #define btrfs_check_acl NULL
2603 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2604 struct inode
*inode
, struct inode
*dir
);
2605 int btrfs_acl_chmod(struct inode
*inode
);
2608 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
2609 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
2610 struct btrfs_root
*root
);
2611 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
2612 struct btrfs_root
*root
);
2613 int btrfs_recover_relocation(struct btrfs_root
*root
);
2614 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
2615 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
2616 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2617 struct extent_buffer
*cow
);
2618 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
2619 struct btrfs_pending_snapshot
*pending
,
2620 u64
*bytes_to_reserve
);
2621 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
2622 struct btrfs_pending_snapshot
*pending
);