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 struct btrfs_ordered_sum
;
45 #define BTRFS_MAGIC "_BHRfS_M"
47 #define BTRFS_MAX_LEVEL 8
49 #define BTRFS_COMPAT_EXTENT_TREE_V0
52 * files bigger than this get some pre-flushing when they are added
53 * to the ordered operations list. That way we limit the total
54 * work done by the commit
56 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
58 /* holds pointers to all of the tree roots */
59 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
61 /* stores information about which extents are in use, and reference counts */
62 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
65 * chunk tree stores translations from logical -> physical block numbering
66 * the super block points to the chunk tree
68 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
71 * stores information about which areas of a given device are in use.
72 * one per device. The tree of tree roots points to the device tree
74 #define BTRFS_DEV_TREE_OBJECTID 4ULL
76 /* one per subvolume, storing files and directories */
77 #define BTRFS_FS_TREE_OBJECTID 5ULL
79 /* directory objectid inside the root tree */
80 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
82 /* holds checksums of all the data extents */
83 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
85 /* orhpan objectid for tracking unlinked/truncated files */
86 #define BTRFS_ORPHAN_OBJECTID -5ULL
88 /* does write ahead logging to speed up fsyncs */
89 #define BTRFS_TREE_LOG_OBJECTID -6ULL
90 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
92 /* for space balancing */
93 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
94 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
97 * extent checksums all have this objectid
98 * this allows them to share the logging tree
101 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
103 /* For storing free space cache */
104 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
106 /* dummy objectid represents multiple objectids */
107 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
110 * All files have objectids in this range.
112 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
113 #define BTRFS_LAST_FREE_OBJECTID -256ULL
114 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
118 * the device items go into the chunk tree. The key is in the form
119 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
121 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
123 #define BTRFS_BTREE_INODE_OBJECTID 1
125 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
128 * we can actually store much bigger names, but lets not confuse the rest
131 #define BTRFS_NAME_LEN 255
133 /* 32 bytes in various csum fields */
134 #define BTRFS_CSUM_SIZE 32
137 #define BTRFS_CSUM_TYPE_CRC32 0
139 static int btrfs_csum_sizes
[] = { 4, 0 };
141 /* four bytes for CRC32 */
142 #define BTRFS_EMPTY_DIR_SIZE 0
144 #define BTRFS_FT_UNKNOWN 0
145 #define BTRFS_FT_REG_FILE 1
146 #define BTRFS_FT_DIR 2
147 #define BTRFS_FT_CHRDEV 3
148 #define BTRFS_FT_BLKDEV 4
149 #define BTRFS_FT_FIFO 5
150 #define BTRFS_FT_SOCK 6
151 #define BTRFS_FT_SYMLINK 7
152 #define BTRFS_FT_XATTR 8
153 #define BTRFS_FT_MAX 9
156 * The key defines the order in the tree, and so it also defines (optimal)
159 * objectid corresponds to the inode number.
161 * type tells us things about the object, and is a kind of stream selector.
162 * so for a given inode, keys with type of 1 might refer to the inode data,
163 * type of 2 may point to file data in the btree and type == 3 may point to
166 * offset is the starting byte offset for this key in the stream.
168 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
169 * in cpu native order. Otherwise they are identical and their sizes
170 * should be the same (ie both packed)
172 struct btrfs_disk_key
{
176 } __attribute__ ((__packed__
));
182 } __attribute__ ((__packed__
));
184 struct btrfs_mapping_tree
{
185 struct extent_map_tree map_tree
;
188 #define BTRFS_UUID_SIZE 16
189 struct btrfs_dev_item
{
190 /* the internal btrfs device id */
193 /* size of the device */
199 /* optimal io alignment for this device */
202 /* optimal io width for this device */
205 /* minimal io size for this device */
208 /* type and info about this device */
211 /* expected generation for this device */
215 * starting byte of this partition on the device,
216 * to allow for stripe alignment in the future
220 /* grouping information for allocation decisions */
223 /* seek speed 0-100 where 100 is fastest */
226 /* bandwidth 0-100 where 100 is fastest */
229 /* btrfs generated uuid for this device */
230 u8 uuid
[BTRFS_UUID_SIZE
];
232 /* uuid of FS who owns this device */
233 u8 fsid
[BTRFS_UUID_SIZE
];
234 } __attribute__ ((__packed__
));
236 struct btrfs_stripe
{
239 u8 dev_uuid
[BTRFS_UUID_SIZE
];
240 } __attribute__ ((__packed__
));
243 /* size of this chunk in bytes */
246 /* objectid of the root referencing this chunk */
252 /* optimal io alignment for this chunk */
255 /* optimal io width for this chunk */
258 /* minimal io size for this chunk */
261 /* 2^16 stripes is quite a lot, a second limit is the size of a single
266 /* sub stripes only matter for raid10 */
268 struct btrfs_stripe stripe
;
269 /* additional stripes go here */
270 } __attribute__ ((__packed__
));
272 #define BTRFS_FREE_SPACE_EXTENT 1
273 #define BTRFS_FREE_SPACE_BITMAP 2
275 struct btrfs_free_space_entry
{
279 } __attribute__ ((__packed__
));
281 struct btrfs_free_space_header
{
282 struct btrfs_disk_key location
;
286 } __attribute__ ((__packed__
));
288 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
290 BUG_ON(num_stripes
== 0);
291 return sizeof(struct btrfs_chunk
) +
292 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
295 #define BTRFS_FSID_SIZE 16
296 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
297 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
303 /* Errors detected */
304 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
306 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
307 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
309 #define BTRFS_BACKREF_REV_MAX 256
310 #define BTRFS_BACKREF_REV_SHIFT 56
311 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
312 BTRFS_BACKREF_REV_SHIFT)
314 #define BTRFS_OLD_BACKREF_REV 0
315 #define BTRFS_MIXED_BACKREF_REV 1
318 * every tree block (leaf or node) starts with this header.
320 struct btrfs_header
{
321 /* these first four must match the super block */
322 u8 csum
[BTRFS_CSUM_SIZE
];
323 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
324 __le64 bytenr
; /* which block this node is supposed to live in */
327 /* allowed to be different from the super from here on down */
328 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
333 } __attribute__ ((__packed__
));
335 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
336 sizeof(struct btrfs_header)) / \
337 sizeof(struct btrfs_key_ptr))
338 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
339 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
340 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
341 sizeof(struct btrfs_item) - \
342 sizeof(struct btrfs_file_extent_item))
343 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
344 sizeof(struct btrfs_item) -\
345 sizeof(struct btrfs_dir_item))
349 * this is a very generous portion of the super block, giving us
350 * room to translate 14 chunks with 3 stripes each.
352 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
353 #define BTRFS_LABEL_SIZE 256
356 * the super block basically lists the main trees of the FS
357 * it currently lacks any block count etc etc
359 struct btrfs_super_block
{
360 u8 csum
[BTRFS_CSUM_SIZE
];
361 /* the first 4 fields must match struct btrfs_header */
362 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
363 __le64 bytenr
; /* this block number */
366 /* allowed to be different from the btrfs_header from here own down */
373 /* this will help find the new super based on the log root */
374 __le64 log_root_transid
;
377 __le64 root_dir_objectid
;
383 __le32 sys_chunk_array_size
;
384 __le64 chunk_root_generation
;
386 __le64 compat_ro_flags
;
387 __le64 incompat_flags
;
392 struct btrfs_dev_item dev_item
;
394 char label
[BTRFS_LABEL_SIZE
];
396 __le64 cache_generation
;
398 /* future expansion */
400 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
401 } __attribute__ ((__packed__
));
404 * Compat flags that we support. If any incompat flags are set other than the
405 * ones specified below then we will fail to mount
407 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
408 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
409 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
410 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
412 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
413 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
414 #define BTRFS_FEATURE_INCOMPAT_SUPP \
415 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
416 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
417 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
418 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
421 * A leaf is full of items. offset and size tell us where to find
422 * the item in the leaf (relative to the start of the data area)
425 struct btrfs_disk_key key
;
428 } __attribute__ ((__packed__
));
431 * leaves have an item area and a data area:
432 * [item0, item1....itemN] [free space] [dataN...data1, data0]
434 * The data is separate from the items to get the keys closer together
438 struct btrfs_header header
;
439 struct btrfs_item items
[];
440 } __attribute__ ((__packed__
));
443 * all non-leaf blocks are nodes, they hold only keys and pointers to
446 struct btrfs_key_ptr
{
447 struct btrfs_disk_key key
;
450 } __attribute__ ((__packed__
));
453 struct btrfs_header header
;
454 struct btrfs_key_ptr ptrs
[];
455 } __attribute__ ((__packed__
));
458 * btrfs_paths remember the path taken from the root down to the leaf.
459 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
460 * to any other levels that are present.
462 * The slots array records the index of the item or block pointer
463 * used while walking the tree.
466 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
467 int slots
[BTRFS_MAX_LEVEL
];
468 /* if there is real range locking, this locks field will change */
469 int locks
[BTRFS_MAX_LEVEL
];
471 /* keep some upper locks as we walk down */
475 * set by btrfs_split_item, tells search_slot to keep all locks
476 * and to force calls to keep space in the nodes
478 unsigned int search_for_split
:1;
479 unsigned int keep_locks
:1;
480 unsigned int skip_locking
:1;
481 unsigned int leave_spinning
:1;
482 unsigned int search_commit_root
:1;
486 * items in the extent btree are used to record the objectid of the
487 * owner of the block and the number of references
490 struct btrfs_extent_item
{
494 } __attribute__ ((__packed__
));
496 struct btrfs_extent_item_v0
{
498 } __attribute__ ((__packed__
));
500 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
501 sizeof(struct btrfs_item))
503 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
504 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
506 /* following flags only apply to tree blocks */
508 /* use full backrefs for extent pointers in the block */
509 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
511 struct btrfs_tree_block_info
{
512 struct btrfs_disk_key key
;
514 } __attribute__ ((__packed__
));
516 struct btrfs_extent_data_ref
{
521 } __attribute__ ((__packed__
));
523 struct btrfs_shared_data_ref
{
525 } __attribute__ ((__packed__
));
527 struct btrfs_extent_inline_ref
{
530 } __attribute__ ((__packed__
));
532 /* old style backrefs item */
533 struct btrfs_extent_ref_v0
{
538 } __attribute__ ((__packed__
));
541 /* dev extents record free space on individual devices. The owner
542 * field points back to the chunk allocation mapping tree that allocated
543 * the extent. The chunk tree uuid field is a way to double check the owner
545 struct btrfs_dev_extent
{
547 __le64 chunk_objectid
;
550 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
551 } __attribute__ ((__packed__
));
553 struct btrfs_inode_ref
{
557 } __attribute__ ((__packed__
));
559 struct btrfs_timespec
{
562 } __attribute__ ((__packed__
));
564 enum btrfs_compression_type
{
565 BTRFS_COMPRESS_NONE
= 0,
566 BTRFS_COMPRESS_ZLIB
= 1,
567 BTRFS_COMPRESS_LZO
= 2,
568 BTRFS_COMPRESS_TYPES
= 2,
569 BTRFS_COMPRESS_LAST
= 3,
572 struct btrfs_inode_item
{
573 /* nfs style generation number */
575 /* transid that last touched this inode */
587 /* modification sequence number for NFS */
591 * a little future expansion, for more than this we can
592 * just grow the inode item and version it
595 struct btrfs_timespec atime
;
596 struct btrfs_timespec ctime
;
597 struct btrfs_timespec mtime
;
598 struct btrfs_timespec otime
;
599 } __attribute__ ((__packed__
));
601 struct btrfs_dir_log_item
{
603 } __attribute__ ((__packed__
));
605 struct btrfs_dir_item
{
606 struct btrfs_disk_key location
;
611 } __attribute__ ((__packed__
));
613 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
615 struct btrfs_root_item
{
616 struct btrfs_inode_item inode
;
622 __le64 last_snapshot
;
625 struct btrfs_disk_key drop_progress
;
628 } __attribute__ ((__packed__
));
631 * this is used for both forward and backward root refs
633 struct btrfs_root_ref
{
637 } __attribute__ ((__packed__
));
639 #define BTRFS_FILE_EXTENT_INLINE 0
640 #define BTRFS_FILE_EXTENT_REG 1
641 #define BTRFS_FILE_EXTENT_PREALLOC 2
643 struct btrfs_file_extent_item
{
645 * transaction id that created this extent
649 * max number of bytes to hold this extent in ram
650 * when we split a compressed extent we can't know how big
651 * each of the resulting pieces will be. So, this is
652 * an upper limit on the size of the extent in ram instead of
658 * 32 bits for the various ways we might encode the data,
659 * including compression and encryption. If any of these
660 * are set to something a given disk format doesn't understand
661 * it is treated like an incompat flag for reading and writing,
666 __le16 other_encoding
; /* spare for later use */
668 /* are we inline data or a real extent? */
672 * disk space consumed by the extent, checksum blocks are included
676 __le64 disk_num_bytes
;
678 * the logical offset in file blocks (no csums)
679 * this extent record is for. This allows a file extent to point
680 * into the middle of an existing extent on disk, sharing it
681 * between two snapshots (useful if some bytes in the middle of the
682 * extent have changed
686 * the logical number of file blocks (no csums included). This
687 * always reflects the size uncompressed and without encoding.
691 } __attribute__ ((__packed__
));
693 struct btrfs_csum_item
{
695 } __attribute__ ((__packed__
));
697 /* different types of block groups (and chunks) */
698 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
699 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
700 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
701 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
702 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
703 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
704 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
705 #define BTRFS_NR_RAID_TYPES 5
707 struct btrfs_block_group_item
{
709 __le64 chunk_objectid
;
711 } __attribute__ ((__packed__
));
713 struct btrfs_space_info
{
716 u64 total_bytes
; /* total bytes in the space,
717 this doesn't take mirrors into account */
718 u64 bytes_used
; /* total bytes used,
719 this does't take mirrors into account */
720 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
721 transaction finishes */
722 u64 bytes_reserved
; /* total bytes the allocator has reserved for
723 current allocations */
724 u64 bytes_readonly
; /* total bytes that are read only */
726 u64 bytes_may_use
; /* number of bytes that may be used for
727 delalloc/allocations */
728 u64 disk_used
; /* total bytes used on disk */
729 u64 disk_total
; /* total bytes on disk, takes mirrors into
733 * we bump reservation progress every time we decrement
734 * bytes_reserved. This way people waiting for reservations
735 * know something good has happened and they can check
736 * for progress. The number here isn't to be trusted, it
737 * just shows reclaim activity
739 unsigned long reservation_progress
;
741 int full
; /* indicates that we cannot allocate any more
742 chunks for this space */
743 int force_alloc
; /* set if we need to force a chunk alloc for
746 struct list_head list
;
748 /* for block groups in our same type */
749 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
751 struct rw_semaphore groups_sem
;
752 atomic_t caching_threads
;
755 struct btrfs_block_rsv
{
759 struct btrfs_space_info
*space_info
;
760 struct list_head list
;
763 unsigned int priority
:8;
764 unsigned int durable
:1;
765 unsigned int refill_used
:1;
770 * free clusters are used to claim free space in relatively large chunks,
771 * allowing us to do less seeky writes. They are used for all metadata
772 * allocations and data allocations in ssd mode.
774 struct btrfs_free_cluster
{
776 spinlock_t refill_lock
;
779 /* largest extent in this cluster */
782 /* first extent starting offset */
785 /* if this cluster simply points at a bitmap in the block group */
786 bool points_to_bitmap
;
788 struct btrfs_block_group_cache
*block_group
;
790 * when a cluster is allocated from a block group, we put the
791 * cluster onto a list in the block group so that it can
792 * be freed before the block group is freed.
794 struct list_head block_group_list
;
797 enum btrfs_caching_type
{
799 BTRFS_CACHE_STARTED
= 1,
800 BTRFS_CACHE_FINISHED
= 2,
803 enum btrfs_disk_cache_state
{
804 BTRFS_DC_WRITTEN
= 0,
808 BTRFS_DC_NEED_WRITE
= 4,
811 struct btrfs_caching_control
{
812 struct list_head list
;
814 wait_queue_head_t wait
;
815 struct btrfs_block_group_cache
*block_group
;
820 struct btrfs_block_group_cache
{
821 struct btrfs_key key
;
822 struct btrfs_block_group_item item
;
823 struct btrfs_fs_info
*fs_info
;
836 unsigned int dirty
:1;
839 int disk_cache_state
;
841 /* cache tracking stuff */
843 struct btrfs_caching_control
*caching_ctl
;
844 u64 last_byte_to_unpin
;
846 struct btrfs_space_info
*space_info
;
848 /* free space cache stuff */
849 spinlock_t tree_lock
;
850 struct rb_root free_space_offset
;
853 /* block group cache stuff */
854 struct rb_node cache_node
;
856 /* for block groups in the same raid type */
857 struct list_head list
;
862 /* List of struct btrfs_free_clusters for this block group.
863 * Today it will only have one thing on it, but that may change
865 struct list_head cluster_list
;
868 struct reloc_control
;
870 struct btrfs_fs_devices
;
871 struct btrfs_fs_info
{
872 u8 fsid
[BTRFS_FSID_SIZE
];
873 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
874 struct btrfs_root
*extent_root
;
875 struct btrfs_root
*tree_root
;
876 struct btrfs_root
*chunk_root
;
877 struct btrfs_root
*dev_root
;
878 struct btrfs_root
*fs_root
;
879 struct btrfs_root
*csum_root
;
881 /* the log root tree is a directory of all the other log roots */
882 struct btrfs_root
*log_root_tree
;
884 spinlock_t fs_roots_radix_lock
;
885 struct radix_tree_root fs_roots_radix
;
887 /* block group cache stuff */
888 spinlock_t block_group_cache_lock
;
889 struct rb_root block_group_cache_tree
;
891 struct extent_io_tree freed_extents
[2];
892 struct extent_io_tree
*pinned_extents
;
894 /* logical->physical extent mapping */
895 struct btrfs_mapping_tree mapping_tree
;
897 /* block reservation for extent, checksum and root tree */
898 struct btrfs_block_rsv global_block_rsv
;
899 /* block reservation for delay allocation */
900 struct btrfs_block_rsv delalloc_block_rsv
;
901 /* block reservation for metadata operations */
902 struct btrfs_block_rsv trans_block_rsv
;
903 /* block reservation for chunk tree */
904 struct btrfs_block_rsv chunk_block_rsv
;
906 struct btrfs_block_rsv empty_block_rsv
;
908 /* list of block reservations that cross multiple transactions */
909 struct list_head durable_block_rsv_list
;
911 struct mutex durable_block_rsv_mutex
;
914 u64 last_trans_committed
;
917 * this is updated to the current trans every time a full commit
918 * is required instead of the faster short fsync log commits
920 u64 last_trans_log_full_commit
;
921 u64 open_ioctl_trans
;
922 unsigned long mount_opt
:20;
923 unsigned long compress_type
:4;
926 struct btrfs_transaction
*running_transaction
;
927 wait_queue_head_t transaction_throttle
;
928 wait_queue_head_t transaction_wait
;
929 wait_queue_head_t transaction_blocked_wait
;
930 wait_queue_head_t async_submit_wait
;
932 struct btrfs_super_block super_copy
;
933 struct btrfs_super_block super_for_commit
;
934 struct block_device
*__bdev
;
935 struct super_block
*sb
;
936 struct inode
*btree_inode
;
937 struct backing_dev_info bdi
;
938 struct mutex trans_mutex
;
939 struct mutex tree_log_mutex
;
940 struct mutex transaction_kthread_mutex
;
941 struct mutex cleaner_mutex
;
942 struct mutex chunk_mutex
;
943 struct mutex volume_mutex
;
945 * this protects the ordered operations list only while we are
946 * processing all of the entries on it. This way we make
947 * sure the commit code doesn't find the list temporarily empty
948 * because another function happens to be doing non-waiting preflush
949 * before jumping into the main commit.
951 struct mutex ordered_operations_mutex
;
952 struct rw_semaphore extent_commit_sem
;
954 struct rw_semaphore cleanup_work_sem
;
956 struct rw_semaphore subvol_sem
;
957 struct srcu_struct subvol_srcu
;
959 struct list_head trans_list
;
960 struct list_head hashers
;
961 struct list_head dead_roots
;
962 struct list_head caching_block_groups
;
964 spinlock_t delayed_iput_lock
;
965 struct list_head delayed_iputs
;
967 atomic_t nr_async_submits
;
968 atomic_t async_submit_draining
;
969 atomic_t nr_async_bios
;
970 atomic_t async_delalloc_pages
;
973 * this is used by the balancing code to wait for all the pending
976 spinlock_t ordered_extent_lock
;
979 * all of the data=ordered extents pending writeback
980 * these can span multiple transactions and basically include
981 * every dirty data page that isn't from nodatacow
983 struct list_head ordered_extents
;
986 * all of the inodes that have delalloc bytes. It is possible for
987 * this list to be empty even when there is still dirty data=ordered
988 * extents waiting to finish IO.
990 struct list_head delalloc_inodes
;
993 * special rename and truncate targets that must be on disk before
994 * we're allowed to commit. This is basically the ext3 style
997 struct list_head ordered_operations
;
1000 * there is a pool of worker threads for checksumming during writes
1001 * and a pool for checksumming after reads. This is because readers
1002 * can run with FS locks held, and the writers may be waiting for
1003 * those locks. We don't want ordering in the pending list to cause
1004 * deadlocks, and so the two are serviced separately.
1006 * A third pool does submit_bio to avoid deadlocking with the other
1009 struct btrfs_workers generic_worker
;
1010 struct btrfs_workers workers
;
1011 struct btrfs_workers delalloc_workers
;
1012 struct btrfs_workers endio_workers
;
1013 struct btrfs_workers endio_meta_workers
;
1014 struct btrfs_workers endio_meta_write_workers
;
1015 struct btrfs_workers endio_write_workers
;
1016 struct btrfs_workers endio_freespace_worker
;
1017 struct btrfs_workers submit_workers
;
1019 * fixup workers take dirty pages that didn't properly go through
1020 * the cow mechanism and make them safe to write. It happens
1021 * for the sys_munmap function call path
1023 struct btrfs_workers fixup_workers
;
1024 struct task_struct
*transaction_kthread
;
1025 struct task_struct
*cleaner_kthread
;
1026 int thread_pool_size
;
1028 struct kobject super_kobj
;
1029 struct completion kobj_unregister
;
1032 int log_root_recovering
;
1037 /* protected by the delalloc lock, used to keep from writing
1038 * metadata until there is a nice batch
1040 u64 dirty_metadata_bytes
;
1041 struct list_head dirty_cowonly_roots
;
1043 struct btrfs_fs_devices
*fs_devices
;
1046 * the space_info list is almost entirely read only. It only changes
1047 * when we add a new raid type to the FS, and that happens
1048 * very rarely. RCU is used to protect it.
1050 struct list_head space_info
;
1052 struct reloc_control
*reloc_ctl
;
1054 spinlock_t delalloc_lock
;
1055 spinlock_t new_trans_lock
;
1058 /* data_alloc_cluster is only used in ssd mode */
1059 struct btrfs_free_cluster data_alloc_cluster
;
1061 /* all metadata allocations go through this cluster */
1062 struct btrfs_free_cluster meta_alloc_cluster
;
1064 spinlock_t ref_cache_lock
;
1065 u64 total_ref_cache_size
;
1067 u64 avail_data_alloc_bits
;
1068 u64 avail_metadata_alloc_bits
;
1069 u64 avail_system_alloc_bits
;
1070 u64 data_alloc_profile
;
1071 u64 metadata_alloc_profile
;
1072 u64 system_alloc_profile
;
1074 unsigned data_chunk_allocations
;
1075 unsigned metadata_ratio
;
1079 /* filesystem state */
1084 * in ram representation of the tree. extent_root is used for all allocations
1085 * and for the extent tree extent_root root.
1088 struct extent_buffer
*node
;
1090 /* the node lock is held while changing the node pointer */
1091 spinlock_t node_lock
;
1093 struct extent_buffer
*commit_root
;
1094 struct btrfs_root
*log_root
;
1095 struct btrfs_root
*reloc_root
;
1097 struct btrfs_root_item root_item
;
1098 struct btrfs_key root_key
;
1099 struct btrfs_fs_info
*fs_info
;
1100 struct extent_io_tree dirty_log_pages
;
1102 struct kobject root_kobj
;
1103 struct completion kobj_unregister
;
1104 struct mutex objectid_mutex
;
1106 spinlock_t accounting_lock
;
1107 struct btrfs_block_rsv
*block_rsv
;
1109 struct mutex log_mutex
;
1110 wait_queue_head_t log_writer_wait
;
1111 wait_queue_head_t log_commit_wait
[2];
1112 atomic_t log_writers
;
1113 atomic_t log_commit
[2];
1114 unsigned long log_transid
;
1115 unsigned long last_log_commit
;
1116 unsigned long log_batch
;
1117 pid_t log_start_pid
;
1118 bool log_multiple_pids
;
1123 /* data allocations are done in sectorsize units */
1126 /* node allocations are done in nodesize units */
1129 /* leaf allocations are done in leafsize units */
1136 u64 highest_objectid
;
1141 u64 defrag_trans_start
;
1142 struct btrfs_key defrag_progress
;
1143 struct btrfs_key defrag_max
;
1148 /* the dirty list is only used by non-reference counted roots */
1149 struct list_head dirty_list
;
1151 struct list_head root_list
;
1153 spinlock_t orphan_lock
;
1154 struct list_head orphan_list
;
1155 struct btrfs_block_rsv
*orphan_block_rsv
;
1156 int orphan_item_inserted
;
1157 int orphan_cleanup_state
;
1159 spinlock_t inode_lock
;
1160 /* red-black tree that keeps track of in-memory inodes */
1161 struct rb_root inode_tree
;
1164 * right now this just gets used so that a root has its own devid
1165 * for stat. It may be used for more later
1167 struct super_block anon_super
;
1171 * inode items have the data typically returned from stat and store other
1172 * info about object characteristics. There is one for every file and dir in
1175 #define BTRFS_INODE_ITEM_KEY 1
1176 #define BTRFS_INODE_REF_KEY 12
1177 #define BTRFS_XATTR_ITEM_KEY 24
1178 #define BTRFS_ORPHAN_ITEM_KEY 48
1179 /* reserve 2-15 close to the inode for later flexibility */
1182 * dir items are the name -> inode pointers in a directory. There is one
1183 * for every name in a directory.
1185 #define BTRFS_DIR_LOG_ITEM_KEY 60
1186 #define BTRFS_DIR_LOG_INDEX_KEY 72
1187 #define BTRFS_DIR_ITEM_KEY 84
1188 #define BTRFS_DIR_INDEX_KEY 96
1190 * extent data is for file data
1192 #define BTRFS_EXTENT_DATA_KEY 108
1195 * extent csums are stored in a separate tree and hold csums for
1196 * an entire extent on disk.
1198 #define BTRFS_EXTENT_CSUM_KEY 128
1201 * root items point to tree roots. They are typically in the root
1202 * tree used by the super block to find all the other trees
1204 #define BTRFS_ROOT_ITEM_KEY 132
1207 * root backrefs tie subvols and snapshots to the directory entries that
1210 #define BTRFS_ROOT_BACKREF_KEY 144
1213 * root refs make a fast index for listing all of the snapshots and
1214 * subvolumes referenced by a given root. They point directly to the
1215 * directory item in the root that references the subvol
1217 #define BTRFS_ROOT_REF_KEY 156
1220 * extent items are in the extent map tree. These record which blocks
1221 * are used, and how many references there are to each block
1223 #define BTRFS_EXTENT_ITEM_KEY 168
1225 #define BTRFS_TREE_BLOCK_REF_KEY 176
1227 #define BTRFS_EXTENT_DATA_REF_KEY 178
1229 #define BTRFS_EXTENT_REF_V0_KEY 180
1231 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1233 #define BTRFS_SHARED_DATA_REF_KEY 184
1236 * block groups give us hints into the extent allocation trees. Which
1237 * blocks are free etc etc
1239 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1241 #define BTRFS_DEV_EXTENT_KEY 204
1242 #define BTRFS_DEV_ITEM_KEY 216
1243 #define BTRFS_CHUNK_ITEM_KEY 228
1246 * string items are for debugging. They just store a short string of
1249 #define BTRFS_STRING_ITEM_KEY 253
1251 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1252 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1253 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1254 #define BTRFS_MOUNT_SSD (1 << 3)
1255 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1256 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1257 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1258 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1259 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1260 #define BTRFS_MOUNT_NOSSD (1 << 9)
1261 #define BTRFS_MOUNT_DISCARD (1 << 10)
1262 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1263 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1264 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1265 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1266 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1268 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1269 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1270 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1275 #define BTRFS_INODE_NODATASUM (1 << 0)
1276 #define BTRFS_INODE_NODATACOW (1 << 1)
1277 #define BTRFS_INODE_READONLY (1 << 2)
1278 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1279 #define BTRFS_INODE_PREALLOC (1 << 4)
1280 #define BTRFS_INODE_SYNC (1 << 5)
1281 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1282 #define BTRFS_INODE_APPEND (1 << 7)
1283 #define BTRFS_INODE_NODUMP (1 << 8)
1284 #define BTRFS_INODE_NOATIME (1 << 9)
1285 #define BTRFS_INODE_DIRSYNC (1 << 10)
1287 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1289 /* some macros to generate set/get funcs for the struct fields. This
1290 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1293 #define le8_to_cpu(v) (v)
1294 #define cpu_to_le8(v) (v)
1297 #define read_eb_member(eb, ptr, type, member, result) ( \
1298 read_extent_buffer(eb, (char *)(result), \
1299 ((unsigned long)(ptr)) + \
1300 offsetof(type, member), \
1301 sizeof(((type *)0)->member)))
1303 #define write_eb_member(eb, ptr, type, member, result) ( \
1304 write_extent_buffer(eb, (char *)(result), \
1305 ((unsigned long)(ptr)) + \
1306 offsetof(type, member), \
1307 sizeof(((type *)0)->member)))
1309 #ifndef BTRFS_SETGET_FUNCS
1310 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1311 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1312 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1315 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1316 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1318 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1319 u##bits res = le##bits##_to_cpu(p->member); \
1320 kunmap_atomic(p, KM_USER0); \
1323 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1326 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1327 p->member = cpu_to_le##bits(val); \
1328 kunmap_atomic(p, KM_USER0); \
1331 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1332 static inline u##bits btrfs_##name(type *s) \
1334 return le##bits##_to_cpu(s->member); \
1336 static inline void btrfs_set_##name(type *s, u##bits val) \
1338 s->member = cpu_to_le##bits(val); \
1341 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1342 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1343 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1344 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1345 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1346 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1348 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1349 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1350 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1351 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1352 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1353 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1355 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1356 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1358 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1360 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1362 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1364 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1366 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1367 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1369 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1371 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1373 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1376 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1378 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1381 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1383 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1386 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1387 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1388 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1389 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1390 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1391 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1392 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1393 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1394 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1395 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1396 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1398 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1400 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1403 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1404 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1405 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1407 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1409 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1411 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1413 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1414 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1416 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1418 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1419 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1421 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1424 unsigned long offset
= (unsigned long)c
;
1425 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1426 offset
+= nr
* sizeof(struct btrfs_stripe
);
1427 return (struct btrfs_stripe
*)offset
;
1430 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1432 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1435 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1436 struct btrfs_chunk
*c
, int nr
)
1438 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1441 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1442 struct btrfs_chunk
*c
, int nr
,
1445 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1448 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1449 struct btrfs_chunk
*c
, int nr
)
1451 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1454 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1455 struct btrfs_chunk
*c
, int nr
,
1458 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1461 /* struct btrfs_block_group_item */
1462 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1464 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1466 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1467 struct btrfs_block_group_item
, chunk_objectid
, 64);
1469 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1470 struct btrfs_block_group_item
, chunk_objectid
, 64);
1471 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1472 struct btrfs_block_group_item
, flags
, 64);
1473 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1474 struct btrfs_block_group_item
, flags
, 64);
1476 /* struct btrfs_inode_ref */
1477 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1478 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1480 /* struct btrfs_inode_item */
1481 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1482 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1483 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1484 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1485 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1486 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1487 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1488 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1489 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1490 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1491 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1492 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1494 static inline struct btrfs_timespec
*
1495 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1497 unsigned long ptr
= (unsigned long)inode_item
;
1498 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1499 return (struct btrfs_timespec
*)ptr
;
1502 static inline struct btrfs_timespec
*
1503 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1505 unsigned long ptr
= (unsigned long)inode_item
;
1506 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1507 return (struct btrfs_timespec
*)ptr
;
1510 static inline struct btrfs_timespec
*
1511 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1513 unsigned long ptr
= (unsigned long)inode_item
;
1514 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1515 return (struct btrfs_timespec
*)ptr
;
1518 static inline struct btrfs_timespec
*
1519 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1521 unsigned long ptr
= (unsigned long)inode_item
;
1522 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1523 return (struct btrfs_timespec
*)ptr
;
1526 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1527 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1529 /* struct btrfs_dev_extent */
1530 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1532 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1533 chunk_objectid
, 64);
1534 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1536 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1538 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1540 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1541 return (u8
*)((unsigned long)dev
+ ptr
);
1544 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1545 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1547 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1549 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1552 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1554 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1555 struct btrfs_tree_block_info
*item
,
1556 struct btrfs_disk_key
*key
)
1558 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1561 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1562 struct btrfs_tree_block_info
*item
,
1563 struct btrfs_disk_key
*key
)
1565 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1568 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1570 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1572 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1574 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1577 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1580 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1582 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1585 static inline u32
btrfs_extent_inline_ref_size(int type
)
1587 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1588 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1589 return sizeof(struct btrfs_extent_inline_ref
);
1590 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1591 return sizeof(struct btrfs_shared_data_ref
) +
1592 sizeof(struct btrfs_extent_inline_ref
);
1593 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1594 return sizeof(struct btrfs_extent_data_ref
) +
1595 offsetof(struct btrfs_extent_inline_ref
, offset
);
1600 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1601 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1603 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1604 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1606 /* struct btrfs_node */
1607 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1608 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1610 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1613 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1614 sizeof(struct btrfs_key_ptr
) * nr
;
1615 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1618 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1622 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1623 sizeof(struct btrfs_key_ptr
) * nr
;
1624 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1627 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1630 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1631 sizeof(struct btrfs_key_ptr
) * nr
;
1632 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1635 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1639 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1640 sizeof(struct btrfs_key_ptr
) * nr
;
1641 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1644 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1646 return offsetof(struct btrfs_node
, ptrs
) +
1647 sizeof(struct btrfs_key_ptr
) * nr
;
1650 void btrfs_node_key(struct extent_buffer
*eb
,
1651 struct btrfs_disk_key
*disk_key
, int nr
);
1653 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1654 struct btrfs_disk_key
*disk_key
, int nr
)
1657 ptr
= btrfs_node_key_ptr_offset(nr
);
1658 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1659 struct btrfs_key_ptr
, key
, disk_key
);
1662 /* struct btrfs_item */
1663 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1664 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1666 static inline unsigned long btrfs_item_nr_offset(int nr
)
1668 return offsetof(struct btrfs_leaf
, items
) +
1669 sizeof(struct btrfs_item
) * nr
;
1672 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1675 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1678 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1679 struct btrfs_item
*item
)
1681 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1684 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1686 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1689 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1691 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1694 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1696 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1699 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1700 struct btrfs_disk_key
*disk_key
, int nr
)
1702 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1703 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1706 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1707 struct btrfs_disk_key
*disk_key
, int nr
)
1709 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1710 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1713 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1716 * struct btrfs_root_ref
1718 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1719 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1720 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1722 /* struct btrfs_dir_item */
1723 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1724 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1725 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1726 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1728 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1729 struct btrfs_dir_item
*item
,
1730 struct btrfs_disk_key
*key
)
1732 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1735 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1736 struct btrfs_dir_item
*item
,
1737 struct btrfs_disk_key
*key
)
1739 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1742 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1744 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1746 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1749 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1750 struct btrfs_free_space_header
*h
,
1751 struct btrfs_disk_key
*key
)
1753 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1756 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1757 struct btrfs_free_space_header
*h
,
1758 struct btrfs_disk_key
*key
)
1760 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1763 /* struct btrfs_disk_key */
1764 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1766 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1767 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1769 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1770 struct btrfs_disk_key
*disk
)
1772 cpu
->offset
= le64_to_cpu(disk
->offset
);
1773 cpu
->type
= disk
->type
;
1774 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1777 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1778 struct btrfs_key
*cpu
)
1780 disk
->offset
= cpu_to_le64(cpu
->offset
);
1781 disk
->type
= cpu
->type
;
1782 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1785 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1786 struct btrfs_key
*key
, int nr
)
1788 struct btrfs_disk_key disk_key
;
1789 btrfs_node_key(eb
, &disk_key
, nr
);
1790 btrfs_disk_key_to_cpu(key
, &disk_key
);
1793 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1794 struct btrfs_key
*key
, int nr
)
1796 struct btrfs_disk_key disk_key
;
1797 btrfs_item_key(eb
, &disk_key
, nr
);
1798 btrfs_disk_key_to_cpu(key
, &disk_key
);
1801 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1802 struct btrfs_dir_item
*item
,
1803 struct btrfs_key
*key
)
1805 struct btrfs_disk_key disk_key
;
1806 btrfs_dir_item_key(eb
, item
, &disk_key
);
1807 btrfs_disk_key_to_cpu(key
, &disk_key
);
1811 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1816 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1821 /* struct btrfs_header */
1822 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1823 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1825 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1826 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1827 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1828 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1830 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1832 return (btrfs_header_flags(eb
) & flag
) == flag
;
1835 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1837 u64 flags
= btrfs_header_flags(eb
);
1838 btrfs_set_header_flags(eb
, flags
| flag
);
1839 return (flags
& flag
) == flag
;
1842 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1844 u64 flags
= btrfs_header_flags(eb
);
1845 btrfs_set_header_flags(eb
, flags
& ~flag
);
1846 return (flags
& flag
) == flag
;
1849 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1851 u64 flags
= btrfs_header_flags(eb
);
1852 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1855 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1858 u64 flags
= btrfs_header_flags(eb
);
1859 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1860 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1861 btrfs_set_header_flags(eb
, flags
);
1864 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1866 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1870 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1872 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1876 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1878 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1882 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1884 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1888 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1893 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1898 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1903 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1905 return btrfs_header_level(eb
) == 0;
1908 /* struct btrfs_root_item */
1909 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1911 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1912 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1913 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1915 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1917 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1918 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1919 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1920 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1921 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1922 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1923 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1924 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1927 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
1929 return root
->root_item
.flags
& BTRFS_ROOT_SUBVOL_RDONLY
;
1932 /* struct btrfs_super_block */
1934 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1935 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1936 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1938 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1939 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1940 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1941 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1942 struct btrfs_super_block
, chunk_root_generation
, 64);
1943 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1945 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1947 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1948 chunk_root_level
, 8);
1949 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1951 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1952 log_root_transid
, 64);
1953 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1955 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1957 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1959 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1961 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1963 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1965 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1967 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1968 root_dir_objectid
, 64);
1969 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1971 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1973 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1974 compat_ro_flags
, 64);
1975 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1976 incompat_flags
, 64);
1977 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1979 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
1980 cache_generation
, 64);
1982 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1984 int t
= btrfs_super_csum_type(s
);
1985 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1986 return btrfs_csum_sizes
[t
];
1989 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1991 return offsetof(struct btrfs_leaf
, items
);
1994 /* struct btrfs_file_extent_item */
1995 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1997 static inline unsigned long
1998 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2000 unsigned long offset
= (unsigned long)e
;
2001 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2005 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2007 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2010 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2012 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2014 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2015 disk_num_bytes
, 64);
2016 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2018 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2020 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2022 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2024 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2026 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2027 other_encoding
, 16);
2029 /* this returns the number of file bytes represented by the inline item.
2030 * If an item is compressed, this is the uncompressed size
2032 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2033 struct btrfs_file_extent_item
*e
)
2035 return btrfs_file_extent_ram_bytes(eb
, e
);
2039 * this returns the number of bytes used by the item on disk, minus the
2040 * size of any extent headers. If a file is compressed on disk, this is
2041 * the compressed size
2043 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2044 struct btrfs_item
*e
)
2046 unsigned long offset
;
2047 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2048 return btrfs_item_size(eb
, e
) - offset
;
2051 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
2053 return sb
->s_fs_info
;
2056 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
2057 const char *name
, int len
)
2059 /* if we already have a name just free it */
2062 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
2066 memcpy(root
->name
, name
, len
);
2067 root
->name
[len
] = '\0';
2072 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2075 return root
->leafsize
;
2076 return root
->nodesize
;
2079 /* helper function to cast into the data area of the leaf. */
2080 #define btrfs_item_ptr(leaf, slot, type) \
2081 ((type *)(btrfs_leaf_data(leaf) + \
2082 btrfs_item_offset_nr(leaf, slot)))
2084 #define btrfs_item_ptr_offset(leaf, slot) \
2085 ((unsigned long)(btrfs_leaf_data(leaf) + \
2086 btrfs_item_offset_nr(leaf, slot)))
2088 static inline struct dentry
*fdentry(struct file
*file
)
2090 return file
->f_path
.dentry
;
2093 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2095 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2096 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2100 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2101 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2102 struct btrfs_root
*root
, unsigned long count
);
2103 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2104 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2105 struct btrfs_root
*root
, u64 bytenr
,
2106 u64 num_bytes
, u64
*refs
, u64
*flags
);
2107 int btrfs_pin_extent(struct btrfs_root
*root
,
2108 u64 bytenr
, u64 num
, int reserved
);
2109 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
2110 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2111 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2112 struct btrfs_root
*root
,
2113 u64 objectid
, u64 offset
, u64 bytenr
);
2114 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
2115 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2116 struct btrfs_fs_info
*info
,
2118 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2119 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2120 u64 search_start
, u64 search_hint
, int owner
);
2121 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2122 struct btrfs_root
*root
, u32 blocksize
,
2123 u64 parent
, u64 root_objectid
,
2124 struct btrfs_disk_key
*key
, int level
,
2125 u64 hint
, u64 empty_size
);
2126 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2127 struct btrfs_root
*root
,
2128 struct extent_buffer
*buf
,
2129 u64 parent
, int last_ref
);
2130 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2131 struct btrfs_root
*root
,
2132 u64 bytenr
, u32 blocksize
,
2134 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2135 struct btrfs_root
*root
,
2136 u64 root_objectid
, u64 owner
,
2137 u64 offset
, struct btrfs_key
*ins
);
2138 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2139 struct btrfs_root
*root
,
2140 u64 root_objectid
, u64 owner
, u64 offset
,
2141 struct btrfs_key
*ins
);
2142 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2143 struct btrfs_root
*root
,
2144 u64 num_bytes
, u64 min_alloc_size
,
2145 u64 empty_size
, u64 hint_byte
,
2146 u64 search_end
, struct btrfs_key
*ins
,
2148 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2149 struct extent_buffer
*buf
, int full_backref
);
2150 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2151 struct extent_buffer
*buf
, int full_backref
);
2152 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2153 struct btrfs_root
*root
,
2154 u64 bytenr
, u64 num_bytes
, u64 flags
,
2156 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2157 struct btrfs_root
*root
,
2158 u64 bytenr
, u64 num_bytes
, u64 parent
,
2159 u64 root_objectid
, u64 owner
, u64 offset
);
2161 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2162 int btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2163 struct btrfs_root
*root
);
2164 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2165 struct btrfs_root
*root
);
2166 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2167 struct btrfs_root
*root
,
2168 u64 bytenr
, u64 num_bytes
, u64 parent
,
2169 u64 root_objectid
, u64 owner
, u64 offset
);
2171 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2172 struct btrfs_root
*root
);
2173 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2174 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2175 int btrfs_read_block_groups(struct btrfs_root
*root
);
2176 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2177 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2178 struct btrfs_root
*root
, u64 bytes_used
,
2179 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2181 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2182 struct btrfs_root
*root
, u64 group_start
);
2183 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2184 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2185 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2186 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2187 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
2188 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
2189 int btrfs_trans_reserve_metadata(struct btrfs_trans_handle
*trans
,
2190 struct btrfs_root
*root
,
2192 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2193 struct btrfs_root
*root
);
2194 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2195 struct inode
*inode
);
2196 void btrfs_orphan_release_metadata(struct inode
*inode
);
2197 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
2198 struct btrfs_pending_snapshot
*pending
);
2199 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2200 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2201 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
2202 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
2203 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2204 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2205 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2206 struct btrfs_block_rsv
*rsv
);
2207 void btrfs_add_durable_block_rsv(struct btrfs_fs_info
*fs_info
,
2208 struct btrfs_block_rsv
*rsv
);
2209 int btrfs_block_rsv_add(struct btrfs_trans_handle
*trans
,
2210 struct btrfs_root
*root
,
2211 struct btrfs_block_rsv
*block_rsv
,
2213 int btrfs_block_rsv_check(struct btrfs_trans_handle
*trans
,
2214 struct btrfs_root
*root
,
2215 struct btrfs_block_rsv
*block_rsv
,
2216 u64 min_reserved
, int min_factor
);
2217 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2218 struct btrfs_block_rsv
*dst_rsv
,
2220 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2221 struct btrfs_block_rsv
*block_rsv
,
2223 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2224 struct btrfs_block_group_cache
*cache
);
2225 int btrfs_set_block_group_rw(struct btrfs_root
*root
,
2226 struct btrfs_block_group_cache
*cache
);
2227 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2228 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2229 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2230 u64 start
, u64 end
);
2231 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2233 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2234 struct btrfs_root
*root
, u64 type
);
2237 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2238 int level
, int *slot
);
2239 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2240 int btrfs_previous_item(struct btrfs_root
*root
,
2241 struct btrfs_path
*path
, u64 min_objectid
,
2243 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2244 struct btrfs_root
*root
, struct btrfs_path
*path
,
2245 struct btrfs_key
*new_key
);
2246 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2247 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2248 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2249 struct btrfs_key
*key
, int lowest_level
,
2250 int cache_only
, u64 min_trans
);
2251 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2252 struct btrfs_key
*max_key
,
2253 struct btrfs_path
*path
, int cache_only
,
2255 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2256 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2257 struct extent_buffer
*parent
, int parent_slot
,
2258 struct extent_buffer
**cow_ret
);
2259 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2260 struct btrfs_root
*root
,
2261 struct extent_buffer
*buf
,
2262 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2263 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2264 struct extent_buffer
*buf
);
2265 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2266 *root
, struct btrfs_path
*path
, u32 data_size
);
2267 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2268 struct btrfs_root
*root
,
2269 struct btrfs_path
*path
,
2270 u32 new_size
, int from_end
);
2271 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2272 struct btrfs_root
*root
,
2273 struct btrfs_path
*path
,
2274 struct btrfs_key
*new_key
,
2275 unsigned long split_offset
);
2276 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2277 struct btrfs_root
*root
,
2278 struct btrfs_path
*path
,
2279 struct btrfs_key
*new_key
);
2280 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2281 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2283 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2284 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2285 int start_slot
, int cache_only
, u64
*last_ret
,
2286 struct btrfs_key
*progress
);
2287 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
2288 struct btrfs_path
*btrfs_alloc_path(void);
2289 void btrfs_free_path(struct btrfs_path
*p
);
2290 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2291 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2293 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2294 struct btrfs_path
*path
, int slot
, int nr
);
2295 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2296 struct btrfs_root
*root
,
2297 struct btrfs_path
*path
)
2299 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2302 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2303 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2304 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
2305 struct btrfs_root
*root
,
2306 struct btrfs_path
*path
,
2307 struct btrfs_key
*cpu_key
, u32
*data_size
,
2309 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2310 struct btrfs_root
*root
,
2311 struct btrfs_path
*path
,
2312 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2314 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2315 struct btrfs_root
*root
,
2316 struct btrfs_path
*path
,
2317 struct btrfs_key
*key
,
2320 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2323 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2324 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2325 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2326 int btrfs_drop_snapshot(struct btrfs_root
*root
,
2327 struct btrfs_block_rsv
*block_rsv
, int update_ref
);
2328 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2329 struct btrfs_root
*root
,
2330 struct extent_buffer
*node
,
2331 struct extent_buffer
*parent
);
2333 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2334 struct btrfs_path
*path
,
2335 u64 root_id
, u64 ref_id
);
2336 int btrfs_add_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_ref(struct btrfs_trans_handle
*trans
,
2341 struct btrfs_root
*tree_root
,
2342 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2343 const char *name
, int name_len
);
2344 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2345 struct btrfs_key
*key
);
2346 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2347 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2349 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2350 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2352 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2353 btrfs_root_item
*item
, struct btrfs_key
*key
);
2354 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
2355 u64
*found_objectid
);
2356 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2357 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2358 int btrfs_set_root_node(struct btrfs_root_item
*item
,
2359 struct extent_buffer
*node
);
2360 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2363 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2364 struct btrfs_root
*root
, const char *name
,
2365 int name_len
, u64 dir
,
2366 struct btrfs_key
*location
, u8 type
, u64 index
);
2367 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2368 struct btrfs_root
*root
,
2369 struct btrfs_path
*path
, u64 dir
,
2370 const char *name
, int name_len
,
2372 struct btrfs_dir_item
*
2373 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2374 struct btrfs_root
*root
,
2375 struct btrfs_path
*path
, u64 dir
,
2376 u64 objectid
, const char *name
, int name_len
,
2378 struct btrfs_dir_item
*
2379 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2380 struct btrfs_path
*path
, u64 dirid
,
2381 const char *name
, int name_len
);
2382 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2383 struct btrfs_path
*path
,
2384 const char *name
, int name_len
);
2385 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2386 struct btrfs_root
*root
,
2387 struct btrfs_path
*path
,
2388 struct btrfs_dir_item
*di
);
2389 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2390 struct btrfs_root
*root
,
2391 struct btrfs_path
*path
, u64 objectid
,
2392 const char *name
, u16 name_len
,
2393 const void *data
, u16 data_len
);
2394 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2395 struct btrfs_root
*root
,
2396 struct btrfs_path
*path
, u64 dir
,
2397 const char *name
, u16 name_len
,
2401 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2402 struct btrfs_root
*root
, u64 offset
);
2403 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2404 struct btrfs_root
*root
, u64 offset
);
2405 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2408 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2409 struct btrfs_root
*fs_root
,
2410 u64 dirid
, u64
*objectid
);
2411 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2414 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2415 struct btrfs_root
*root
,
2416 const char *name
, int name_len
,
2417 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2418 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2419 struct btrfs_root
*root
,
2420 const char *name
, int name_len
,
2421 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2422 struct btrfs_inode_ref
*
2423 btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2424 struct btrfs_root
*root
,
2425 struct btrfs_path
*path
,
2426 const char *name
, int name_len
,
2427 u64 inode_objectid
, u64 ref_objectid
, int mod
);
2428 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2429 struct btrfs_root
*root
,
2430 struct btrfs_path
*path
, u64 objectid
);
2431 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2432 *root
, struct btrfs_path
*path
,
2433 struct btrfs_key
*location
, int mod
);
2436 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2437 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2438 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2439 struct bio
*bio
, u32
*dst
);
2440 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
2441 struct bio
*bio
, u64 logical_offset
, u32
*dst
);
2442 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2443 struct btrfs_root
*root
,
2444 u64 objectid
, u64 pos
,
2445 u64 disk_offset
, u64 disk_num_bytes
,
2446 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2447 u8 compression
, u8 encryption
, u16 other_encoding
);
2448 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2449 struct btrfs_root
*root
,
2450 struct btrfs_path
*path
, u64 objectid
,
2451 u64 bytenr
, int mod
);
2452 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2453 struct btrfs_root
*root
,
2454 struct btrfs_ordered_sum
*sums
);
2455 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2456 struct bio
*bio
, u64 file_start
, int contig
);
2457 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
2458 u64 start
, unsigned long len
);
2459 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2460 struct btrfs_root
*root
,
2461 struct btrfs_path
*path
,
2462 u64 bytenr
, int cow
);
2463 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2464 struct btrfs_root
*root
, struct btrfs_path
*path
,
2466 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
2467 u64 end
, struct list_head
*list
);
2470 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2471 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2472 #define ClearPageChecked ClearPageFsMisc
2473 #define SetPageChecked SetPageFsMisc
2474 #define PageChecked PageFsMisc
2477 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2478 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2479 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2480 struct btrfs_root
*root
,
2481 struct inode
*dir
, struct inode
*inode
,
2482 const char *name
, int name_len
);
2483 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2484 struct inode
*parent_inode
, struct inode
*inode
,
2485 const char *name
, int name_len
, int add_backref
, u64 index
);
2486 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2487 struct btrfs_root
*root
,
2488 struct inode
*dir
, u64 objectid
,
2489 const char *name
, int name_len
);
2490 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2491 struct btrfs_root
*root
,
2492 struct inode
*inode
, u64 new_size
,
2495 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2496 int btrfs_start_one_delalloc_inode(struct btrfs_root
*root
, int delay_iput
,
2498 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
2499 struct extent_state
**cached_state
);
2500 int btrfs_writepages(struct address_space
*mapping
,
2501 struct writeback_control
*wbc
);
2502 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2503 struct btrfs_root
*new_root
,
2504 u64 new_dirid
, u64 alloc_hint
);
2505 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2506 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2508 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2509 struct file_ra_state
*ra
, struct file
*file
,
2510 pgoff_t offset
, pgoff_t last_index
);
2511 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2512 int btrfs_readpage(struct file
*file
, struct page
*page
);
2513 void btrfs_evict_inode(struct inode
*inode
);
2514 void btrfs_put_inode(struct inode
*inode
);
2515 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
2516 void btrfs_dirty_inode(struct inode
*inode
);
2517 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2518 void btrfs_destroy_inode(struct inode
*inode
);
2519 int btrfs_drop_inode(struct inode
*inode
);
2520 int btrfs_init_cachep(void);
2521 void btrfs_destroy_cachep(void);
2522 long btrfs_ioctl_trans_end(struct file
*file
);
2523 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2524 struct btrfs_root
*root
, int *was_new
);
2525 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2526 unsigned from
, unsigned to
);
2527 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2528 size_t page_offset
, u64 start
, u64 end
,
2530 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2531 struct btrfs_root
*root
,
2532 struct inode
*inode
);
2533 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2534 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2535 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
2536 void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle
*trans
,
2537 struct btrfs_pending_snapshot
*pending
,
2538 u64
*bytes_to_reserve
);
2539 void btrfs_orphan_post_snapshot(struct btrfs_trans_handle
*trans
,
2540 struct btrfs_pending_snapshot
*pending
);
2541 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
2542 struct btrfs_root
*root
);
2543 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
2544 int btrfs_invalidate_inodes(struct btrfs_root
*root
);
2545 void btrfs_add_delayed_iput(struct inode
*inode
);
2546 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
2547 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
2548 u64 start
, u64 num_bytes
, u64 min_size
,
2549 loff_t actual_len
, u64
*alloc_hint
);
2550 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
2551 struct btrfs_trans_handle
*trans
, int mode
,
2552 u64 start
, u64 num_bytes
, u64 min_size
,
2553 loff_t actual_len
, u64
*alloc_hint
);
2554 extern const struct dentry_operations btrfs_dentry_operations
;
2557 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2558 void btrfs_update_iflags(struct inode
*inode
);
2559 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2562 int btrfs_sync_file(struct file
*file
, int datasync
);
2563 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2565 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2566 extern const struct file_operations btrfs_file_operations
;
2567 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
2568 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
2569 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2570 struct inode
*inode
, u64 start
, u64 end
);
2571 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2574 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2575 struct btrfs_root
*root
, int cache_only
);
2578 int btrfs_init_sysfs(void);
2579 void btrfs_exit_sysfs(void);
2580 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2581 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2582 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2583 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2586 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2589 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2590 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2591 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
2592 unsigned int line
, int errno
);
2594 #define btrfs_std_error(fs_info, errno) \
2597 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2601 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2602 int btrfs_check_acl(struct inode
*inode
, int mask
, unsigned int flags
);
2604 #define btrfs_check_acl NULL
2606 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2607 struct inode
*inode
, struct inode
*dir
);
2608 int btrfs_acl_chmod(struct inode
*inode
);
2611 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
2612 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
2613 struct btrfs_root
*root
);
2614 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
2615 struct btrfs_root
*root
);
2616 int btrfs_recover_relocation(struct btrfs_root
*root
);
2617 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
2618 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
2619 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2620 struct extent_buffer
*cow
);
2621 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
2622 struct btrfs_pending_snapshot
*pending
,
2623 u64
*bytes_to_reserve
);
2624 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
2625 struct btrfs_pending_snapshot
*pending
);