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 <trace/events/btrfs.h>
32 #include <asm/kmap_types.h>
33 #include "extent_io.h"
34 #include "extent_map.h"
35 #include "async-thread.h"
37 struct btrfs_trans_handle
;
38 struct btrfs_transaction
;
39 struct btrfs_pending_snapshot
;
40 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
41 extern struct kmem_cache
*btrfs_transaction_cachep
;
42 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
43 extern struct kmem_cache
*btrfs_path_cachep
;
44 extern struct kmem_cache
*btrfs_free_space_cachep
;
45 struct btrfs_ordered_sum
;
47 #define BTRFS_MAGIC "_BHRfS_M"
49 #define BTRFS_MAX_LEVEL 8
51 #define BTRFS_COMPAT_EXTENT_TREE_V0
54 * files bigger than this get some pre-flushing when they are added
55 * to the ordered operations list. That way we limit the total
56 * work done by the commit
58 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
60 /* holds pointers to all of the tree roots */
61 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
63 /* stores information about which extents are in use, and reference counts */
64 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
67 * chunk tree stores translations from logical -> physical block numbering
68 * the super block points to the chunk tree
70 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
73 * stores information about which areas of a given device are in use.
74 * one per device. The tree of tree roots points to the device tree
76 #define BTRFS_DEV_TREE_OBJECTID 4ULL
78 /* one per subvolume, storing files and directories */
79 #define BTRFS_FS_TREE_OBJECTID 5ULL
81 /* directory objectid inside the root tree */
82 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
84 /* holds checksums of all the data extents */
85 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
87 /* orhpan objectid for tracking unlinked/truncated files */
88 #define BTRFS_ORPHAN_OBJECTID -5ULL
90 /* does write ahead logging to speed up fsyncs */
91 #define BTRFS_TREE_LOG_OBJECTID -6ULL
92 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
94 /* for space balancing */
95 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
96 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
99 * extent checksums all have this objectid
100 * this allows them to share the logging tree
103 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
105 /* For storing free space cache */
106 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
108 /* dummy objectid represents multiple objectids */
109 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
112 * All files have objectids in this range.
114 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
115 #define BTRFS_LAST_FREE_OBJECTID -256ULL
116 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
120 * the device items go into the chunk tree. The key is in the form
121 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
123 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
125 #define BTRFS_BTREE_INODE_OBJECTID 1
127 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
130 * we can actually store much bigger names, but lets not confuse the rest
133 #define BTRFS_NAME_LEN 255
135 /* 32 bytes in various csum fields */
136 #define BTRFS_CSUM_SIZE 32
139 #define BTRFS_CSUM_TYPE_CRC32 0
141 static int btrfs_csum_sizes
[] = { 4, 0 };
143 /* four bytes for CRC32 */
144 #define BTRFS_EMPTY_DIR_SIZE 0
146 #define BTRFS_FT_UNKNOWN 0
147 #define BTRFS_FT_REG_FILE 1
148 #define BTRFS_FT_DIR 2
149 #define BTRFS_FT_CHRDEV 3
150 #define BTRFS_FT_BLKDEV 4
151 #define BTRFS_FT_FIFO 5
152 #define BTRFS_FT_SOCK 6
153 #define BTRFS_FT_SYMLINK 7
154 #define BTRFS_FT_XATTR 8
155 #define BTRFS_FT_MAX 9
158 * The key defines the order in the tree, and so it also defines (optimal)
161 * objectid corresponds to the inode number.
163 * type tells us things about the object, and is a kind of stream selector.
164 * so for a given inode, keys with type of 1 might refer to the inode data,
165 * type of 2 may point to file data in the btree and type == 3 may point to
168 * offset is the starting byte offset for this key in the stream.
170 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
171 * in cpu native order. Otherwise they are identical and their sizes
172 * should be the same (ie both packed)
174 struct btrfs_disk_key
{
178 } __attribute__ ((__packed__
));
184 } __attribute__ ((__packed__
));
186 struct btrfs_mapping_tree
{
187 struct extent_map_tree map_tree
;
190 #define BTRFS_UUID_SIZE 16
191 struct btrfs_dev_item
{
192 /* the internal btrfs device id */
195 /* size of the device */
201 /* optimal io alignment for this device */
204 /* optimal io width for this device */
207 /* minimal io size for this device */
210 /* type and info about this device */
213 /* expected generation for this device */
217 * starting byte of this partition on the device,
218 * to allow for stripe alignment in the future
222 /* grouping information for allocation decisions */
225 /* seek speed 0-100 where 100 is fastest */
228 /* bandwidth 0-100 where 100 is fastest */
231 /* btrfs generated uuid for this device */
232 u8 uuid
[BTRFS_UUID_SIZE
];
234 /* uuid of FS who owns this device */
235 u8 fsid
[BTRFS_UUID_SIZE
];
236 } __attribute__ ((__packed__
));
238 struct btrfs_stripe
{
241 u8 dev_uuid
[BTRFS_UUID_SIZE
];
242 } __attribute__ ((__packed__
));
245 /* size of this chunk in bytes */
248 /* objectid of the root referencing this chunk */
254 /* optimal io alignment for this chunk */
257 /* optimal io width for this chunk */
260 /* minimal io size for this chunk */
263 /* 2^16 stripes is quite a lot, a second limit is the size of a single
268 /* sub stripes only matter for raid10 */
270 struct btrfs_stripe stripe
;
271 /* additional stripes go here */
272 } __attribute__ ((__packed__
));
274 #define BTRFS_FREE_SPACE_EXTENT 1
275 #define BTRFS_FREE_SPACE_BITMAP 2
277 struct btrfs_free_space_entry
{
281 } __attribute__ ((__packed__
));
283 struct btrfs_free_space_header
{
284 struct btrfs_disk_key location
;
288 } __attribute__ ((__packed__
));
290 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
292 BUG_ON(num_stripes
== 0);
293 return sizeof(struct btrfs_chunk
) +
294 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
297 #define BTRFS_FSID_SIZE 16
298 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
299 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
305 /* Errors detected */
306 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
308 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
309 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
311 #define BTRFS_BACKREF_REV_MAX 256
312 #define BTRFS_BACKREF_REV_SHIFT 56
313 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
314 BTRFS_BACKREF_REV_SHIFT)
316 #define BTRFS_OLD_BACKREF_REV 0
317 #define BTRFS_MIXED_BACKREF_REV 1
320 * every tree block (leaf or node) starts with this header.
322 struct btrfs_header
{
323 /* these first four must match the super block */
324 u8 csum
[BTRFS_CSUM_SIZE
];
325 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
326 __le64 bytenr
; /* which block this node is supposed to live in */
329 /* allowed to be different from the super from here on down */
330 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
335 } __attribute__ ((__packed__
));
337 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
338 sizeof(struct btrfs_header)) / \
339 sizeof(struct btrfs_key_ptr))
340 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
341 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
342 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
343 sizeof(struct btrfs_item) - \
344 sizeof(struct btrfs_file_extent_item))
345 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
346 sizeof(struct btrfs_item) -\
347 sizeof(struct btrfs_dir_item))
351 * this is a very generous portion of the super block, giving us
352 * room to translate 14 chunks with 3 stripes each.
354 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
355 #define BTRFS_LABEL_SIZE 256
358 * the super block basically lists the main trees of the FS
359 * it currently lacks any block count etc etc
361 struct btrfs_super_block
{
362 u8 csum
[BTRFS_CSUM_SIZE
];
363 /* the first 4 fields must match struct btrfs_header */
364 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
365 __le64 bytenr
; /* this block number */
368 /* allowed to be different from the btrfs_header from here own down */
375 /* this will help find the new super based on the log root */
376 __le64 log_root_transid
;
379 __le64 root_dir_objectid
;
385 __le32 sys_chunk_array_size
;
386 __le64 chunk_root_generation
;
388 __le64 compat_ro_flags
;
389 __le64 incompat_flags
;
394 struct btrfs_dev_item dev_item
;
396 char label
[BTRFS_LABEL_SIZE
];
398 __le64 cache_generation
;
400 /* future expansion */
402 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
403 } __attribute__ ((__packed__
));
406 * Compat flags that we support. If any incompat flags are set other than the
407 * ones specified below then we will fail to mount
409 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
410 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
411 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
412 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
414 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
415 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
416 #define BTRFS_FEATURE_INCOMPAT_SUPP \
417 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
418 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
419 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
420 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
423 * A leaf is full of items. offset and size tell us where to find
424 * the item in the leaf (relative to the start of the data area)
427 struct btrfs_disk_key key
;
430 } __attribute__ ((__packed__
));
433 * leaves have an item area and a data area:
434 * [item0, item1....itemN] [free space] [dataN...data1, data0]
436 * The data is separate from the items to get the keys closer together
440 struct btrfs_header header
;
441 struct btrfs_item items
[];
442 } __attribute__ ((__packed__
));
445 * all non-leaf blocks are nodes, they hold only keys and pointers to
448 struct btrfs_key_ptr
{
449 struct btrfs_disk_key key
;
452 } __attribute__ ((__packed__
));
455 struct btrfs_header header
;
456 struct btrfs_key_ptr ptrs
[];
457 } __attribute__ ((__packed__
));
460 * btrfs_paths remember the path taken from the root down to the leaf.
461 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
462 * to any other levels that are present.
464 * The slots array records the index of the item or block pointer
465 * used while walking the tree.
468 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
469 int slots
[BTRFS_MAX_LEVEL
];
470 /* if there is real range locking, this locks field will change */
471 int locks
[BTRFS_MAX_LEVEL
];
473 /* keep some upper locks as we walk down */
477 * set by btrfs_split_item, tells search_slot to keep all locks
478 * and to force calls to keep space in the nodes
480 unsigned int search_for_split
:1;
481 unsigned int keep_locks
:1;
482 unsigned int skip_locking
:1;
483 unsigned int leave_spinning
:1;
484 unsigned int search_commit_root
:1;
488 * items in the extent btree are used to record the objectid of the
489 * owner of the block and the number of references
492 struct btrfs_extent_item
{
496 } __attribute__ ((__packed__
));
498 struct btrfs_extent_item_v0
{
500 } __attribute__ ((__packed__
));
502 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
503 sizeof(struct btrfs_item))
505 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
506 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
508 /* following flags only apply to tree blocks */
510 /* use full backrefs for extent pointers in the block */
511 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
513 struct btrfs_tree_block_info
{
514 struct btrfs_disk_key key
;
516 } __attribute__ ((__packed__
));
518 struct btrfs_extent_data_ref
{
523 } __attribute__ ((__packed__
));
525 struct btrfs_shared_data_ref
{
527 } __attribute__ ((__packed__
));
529 struct btrfs_extent_inline_ref
{
532 } __attribute__ ((__packed__
));
534 /* old style backrefs item */
535 struct btrfs_extent_ref_v0
{
540 } __attribute__ ((__packed__
));
543 /* dev extents record free space on individual devices. The owner
544 * field points back to the chunk allocation mapping tree that allocated
545 * the extent. The chunk tree uuid field is a way to double check the owner
547 struct btrfs_dev_extent
{
549 __le64 chunk_objectid
;
552 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
553 } __attribute__ ((__packed__
));
555 struct btrfs_inode_ref
{
559 } __attribute__ ((__packed__
));
561 struct btrfs_timespec
{
564 } __attribute__ ((__packed__
));
566 enum btrfs_compression_type
{
567 BTRFS_COMPRESS_NONE
= 0,
568 BTRFS_COMPRESS_ZLIB
= 1,
569 BTRFS_COMPRESS_LZO
= 2,
570 BTRFS_COMPRESS_TYPES
= 2,
571 BTRFS_COMPRESS_LAST
= 3,
574 struct btrfs_inode_item
{
575 /* nfs style generation number */
577 /* transid that last touched this inode */
589 /* modification sequence number for NFS */
593 * a little future expansion, for more than this we can
594 * just grow the inode item and version it
597 struct btrfs_timespec atime
;
598 struct btrfs_timespec ctime
;
599 struct btrfs_timespec mtime
;
600 struct btrfs_timespec otime
;
601 } __attribute__ ((__packed__
));
603 struct btrfs_dir_log_item
{
605 } __attribute__ ((__packed__
));
607 struct btrfs_dir_item
{
608 struct btrfs_disk_key location
;
613 } __attribute__ ((__packed__
));
615 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
617 struct btrfs_root_item
{
618 struct btrfs_inode_item inode
;
624 __le64 last_snapshot
;
627 struct btrfs_disk_key drop_progress
;
630 } __attribute__ ((__packed__
));
633 * this is used for both forward and backward root refs
635 struct btrfs_root_ref
{
639 } __attribute__ ((__packed__
));
641 #define BTRFS_FILE_EXTENT_INLINE 0
642 #define BTRFS_FILE_EXTENT_REG 1
643 #define BTRFS_FILE_EXTENT_PREALLOC 2
645 struct btrfs_file_extent_item
{
647 * transaction id that created this extent
651 * max number of bytes to hold this extent in ram
652 * when we split a compressed extent we can't know how big
653 * each of the resulting pieces will be. So, this is
654 * an upper limit on the size of the extent in ram instead of
660 * 32 bits for the various ways we might encode the data,
661 * including compression and encryption. If any of these
662 * are set to something a given disk format doesn't understand
663 * it is treated like an incompat flag for reading and writing,
668 __le16 other_encoding
; /* spare for later use */
670 /* are we inline data or a real extent? */
674 * disk space consumed by the extent, checksum blocks are included
678 __le64 disk_num_bytes
;
680 * the logical offset in file blocks (no csums)
681 * this extent record is for. This allows a file extent to point
682 * into the middle of an existing extent on disk, sharing it
683 * between two snapshots (useful if some bytes in the middle of the
684 * extent have changed
688 * the logical number of file blocks (no csums included). This
689 * always reflects the size uncompressed and without encoding.
693 } __attribute__ ((__packed__
));
695 struct btrfs_csum_item
{
697 } __attribute__ ((__packed__
));
699 /* different types of block groups (and chunks) */
700 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
701 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
702 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
703 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
704 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
705 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
706 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
707 #define BTRFS_NR_RAID_TYPES 5
709 struct btrfs_block_group_item
{
711 __le64 chunk_objectid
;
713 } __attribute__ ((__packed__
));
715 struct btrfs_space_info
{
718 u64 total_bytes
; /* total bytes in the space,
719 this doesn't take mirrors into account */
720 u64 bytes_used
; /* total bytes used,
721 this does't take mirrors into account */
722 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
723 transaction finishes */
724 u64 bytes_reserved
; /* total bytes the allocator has reserved for
725 current allocations */
726 u64 bytes_readonly
; /* total bytes that are read only */
728 u64 bytes_may_use
; /* number of bytes that may be used for
729 delalloc/allocations */
730 u64 disk_used
; /* total bytes used on disk */
731 u64 disk_total
; /* total bytes on disk, takes mirrors into
735 * we bump reservation progress every time we decrement
736 * bytes_reserved. This way people waiting for reservations
737 * know something good has happened and they can check
738 * for progress. The number here isn't to be trusted, it
739 * just shows reclaim activity
741 unsigned long reservation_progress
;
743 int full
:1; /* indicates that we cannot allocate any more
744 chunks for this space */
745 int chunk_alloc
:1; /* set if we are allocating a chunk */
747 int force_alloc
; /* set if we need to force a chunk alloc for
750 struct list_head list
;
752 /* for block groups in our same type */
753 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
755 struct rw_semaphore groups_sem
;
756 atomic_t caching_threads
;
759 struct btrfs_block_rsv
{
763 struct btrfs_space_info
*space_info
;
764 struct list_head list
;
767 unsigned int priority
:8;
768 unsigned int durable
:1;
769 unsigned int refill_used
:1;
774 * free clusters are used to claim free space in relatively large chunks,
775 * allowing us to do less seeky writes. They are used for all metadata
776 * allocations and data allocations in ssd mode.
778 struct btrfs_free_cluster
{
780 spinlock_t refill_lock
;
783 /* largest extent in this cluster */
786 /* first extent starting offset */
789 struct btrfs_block_group_cache
*block_group
;
791 * when a cluster is allocated from a block group, we put the
792 * cluster onto a list in the block group so that it can
793 * be freed before the block group is freed.
795 struct list_head block_group_list
;
798 enum btrfs_caching_type
{
800 BTRFS_CACHE_STARTED
= 1,
801 BTRFS_CACHE_FINISHED
= 2,
804 enum btrfs_disk_cache_state
{
805 BTRFS_DC_WRITTEN
= 0,
809 BTRFS_DC_NEED_WRITE
= 4,
812 struct btrfs_caching_control
{
813 struct list_head list
;
815 wait_queue_head_t wait
;
816 struct btrfs_block_group_cache
*block_group
;
821 struct btrfs_block_group_cache
{
822 struct btrfs_key key
;
823 struct btrfs_block_group_item item
;
824 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 struct btrfs_free_space_ctl
*free_space_ctl
;
849 /* block group cache stuff */
850 struct rb_node cache_node
;
852 /* for block groups in the same raid type */
853 struct list_head list
;
858 /* List of struct btrfs_free_clusters for this block group.
859 * Today it will only have one thing on it, but that may change
861 struct list_head cluster_list
;
864 struct reloc_control
;
866 struct btrfs_fs_devices
;
867 struct btrfs_fs_info
{
868 u8 fsid
[BTRFS_FSID_SIZE
];
869 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
870 struct btrfs_root
*extent_root
;
871 struct btrfs_root
*tree_root
;
872 struct btrfs_root
*chunk_root
;
873 struct btrfs_root
*dev_root
;
874 struct btrfs_root
*fs_root
;
875 struct btrfs_root
*csum_root
;
877 /* the log root tree is a directory of all the other log roots */
878 struct btrfs_root
*log_root_tree
;
880 spinlock_t fs_roots_radix_lock
;
881 struct radix_tree_root fs_roots_radix
;
883 /* block group cache stuff */
884 spinlock_t block_group_cache_lock
;
885 struct rb_root block_group_cache_tree
;
887 struct extent_io_tree freed_extents
[2];
888 struct extent_io_tree
*pinned_extents
;
890 /* logical->physical extent mapping */
891 struct btrfs_mapping_tree mapping_tree
;
893 /* block reservation for extent, checksum and root tree */
894 struct btrfs_block_rsv global_block_rsv
;
895 /* block reservation for delay allocation */
896 struct btrfs_block_rsv delalloc_block_rsv
;
897 /* block reservation for metadata operations */
898 struct btrfs_block_rsv trans_block_rsv
;
899 /* block reservation for chunk tree */
900 struct btrfs_block_rsv chunk_block_rsv
;
902 struct btrfs_block_rsv empty_block_rsv
;
904 /* list of block reservations that cross multiple transactions */
905 struct list_head durable_block_rsv_list
;
907 struct mutex durable_block_rsv_mutex
;
910 u64 last_trans_committed
;
913 * this is updated to the current trans every time a full commit
914 * is required instead of the faster short fsync log commits
916 u64 last_trans_log_full_commit
;
917 u64 open_ioctl_trans
;
918 unsigned long mount_opt
:20;
919 unsigned long compress_type
:4;
922 struct btrfs_transaction
*running_transaction
;
923 wait_queue_head_t transaction_throttle
;
924 wait_queue_head_t transaction_wait
;
925 wait_queue_head_t transaction_blocked_wait
;
926 wait_queue_head_t async_submit_wait
;
928 struct btrfs_super_block super_copy
;
929 struct btrfs_super_block super_for_commit
;
930 struct block_device
*__bdev
;
931 struct super_block
*sb
;
932 struct inode
*btree_inode
;
933 struct backing_dev_info bdi
;
934 struct mutex trans_mutex
;
935 struct mutex tree_log_mutex
;
936 struct mutex transaction_kthread_mutex
;
937 struct mutex cleaner_mutex
;
938 struct mutex chunk_mutex
;
939 struct mutex volume_mutex
;
941 * this protects the ordered operations list only while we are
942 * processing all of the entries on it. This way we make
943 * sure the commit code doesn't find the list temporarily empty
944 * because another function happens to be doing non-waiting preflush
945 * before jumping into the main commit.
947 struct mutex ordered_operations_mutex
;
948 struct rw_semaphore extent_commit_sem
;
950 struct rw_semaphore cleanup_work_sem
;
952 struct rw_semaphore subvol_sem
;
953 struct srcu_struct subvol_srcu
;
955 struct list_head trans_list
;
956 struct list_head hashers
;
957 struct list_head dead_roots
;
958 struct list_head caching_block_groups
;
960 spinlock_t delayed_iput_lock
;
961 struct list_head delayed_iputs
;
963 atomic_t nr_async_submits
;
964 atomic_t async_submit_draining
;
965 atomic_t nr_async_bios
;
966 atomic_t async_delalloc_pages
;
969 * this is used by the balancing code to wait for all the pending
972 spinlock_t ordered_extent_lock
;
975 * all of the data=ordered extents pending writeback
976 * these can span multiple transactions and basically include
977 * every dirty data page that isn't from nodatacow
979 struct list_head ordered_extents
;
982 * all of the inodes that have delalloc bytes. It is possible for
983 * this list to be empty even when there is still dirty data=ordered
984 * extents waiting to finish IO.
986 struct list_head delalloc_inodes
;
989 * special rename and truncate targets that must be on disk before
990 * we're allowed to commit. This is basically the ext3 style
993 struct list_head ordered_operations
;
996 * there is a pool of worker threads for checksumming during writes
997 * and a pool for checksumming after reads. This is because readers
998 * can run with FS locks held, and the writers may be waiting for
999 * those locks. We don't want ordering in the pending list to cause
1000 * deadlocks, and so the two are serviced separately.
1002 * A third pool does submit_bio to avoid deadlocking with the other
1005 struct btrfs_workers generic_worker
;
1006 struct btrfs_workers workers
;
1007 struct btrfs_workers delalloc_workers
;
1008 struct btrfs_workers endio_workers
;
1009 struct btrfs_workers endio_meta_workers
;
1010 struct btrfs_workers endio_meta_write_workers
;
1011 struct btrfs_workers endio_write_workers
;
1012 struct btrfs_workers endio_freespace_worker
;
1013 struct btrfs_workers submit_workers
;
1015 * fixup workers take dirty pages that didn't properly go through
1016 * the cow mechanism and make them safe to write. It happens
1017 * for the sys_munmap function call path
1019 struct btrfs_workers fixup_workers
;
1020 struct task_struct
*transaction_kthread
;
1021 struct task_struct
*cleaner_kthread
;
1022 int thread_pool_size
;
1024 struct kobject super_kobj
;
1025 struct completion kobj_unregister
;
1028 int log_root_recovering
;
1033 /* protected by the delalloc lock, used to keep from writing
1034 * metadata until there is a nice batch
1036 u64 dirty_metadata_bytes
;
1037 struct list_head dirty_cowonly_roots
;
1039 struct btrfs_fs_devices
*fs_devices
;
1042 * the space_info list is almost entirely read only. It only changes
1043 * when we add a new raid type to the FS, and that happens
1044 * very rarely. RCU is used to protect it.
1046 struct list_head space_info
;
1048 struct reloc_control
*reloc_ctl
;
1050 spinlock_t delalloc_lock
;
1051 spinlock_t new_trans_lock
;
1054 /* data_alloc_cluster is only used in ssd mode */
1055 struct btrfs_free_cluster data_alloc_cluster
;
1057 /* all metadata allocations go through this cluster */
1058 struct btrfs_free_cluster meta_alloc_cluster
;
1060 spinlock_t ref_cache_lock
;
1061 u64 total_ref_cache_size
;
1063 u64 avail_data_alloc_bits
;
1064 u64 avail_metadata_alloc_bits
;
1065 u64 avail_system_alloc_bits
;
1066 u64 data_alloc_profile
;
1067 u64 metadata_alloc_profile
;
1068 u64 system_alloc_profile
;
1070 unsigned data_chunk_allocations
;
1071 unsigned metadata_ratio
;
1075 /* filesystem state */
1080 * in ram representation of the tree. extent_root is used for all allocations
1081 * and for the extent tree extent_root root.
1084 struct extent_buffer
*node
;
1086 /* the node lock is held while changing the node pointer */
1087 spinlock_t node_lock
;
1089 struct extent_buffer
*commit_root
;
1090 struct btrfs_root
*log_root
;
1091 struct btrfs_root
*reloc_root
;
1093 struct btrfs_root_item root_item
;
1094 struct btrfs_key root_key
;
1095 struct btrfs_fs_info
*fs_info
;
1096 struct extent_io_tree dirty_log_pages
;
1098 struct kobject root_kobj
;
1099 struct completion kobj_unregister
;
1100 struct mutex objectid_mutex
;
1102 spinlock_t accounting_lock
;
1103 struct btrfs_block_rsv
*block_rsv
;
1105 struct mutex log_mutex
;
1106 wait_queue_head_t log_writer_wait
;
1107 wait_queue_head_t log_commit_wait
[2];
1108 atomic_t log_writers
;
1109 atomic_t log_commit
[2];
1110 unsigned long log_transid
;
1111 unsigned long last_log_commit
;
1112 unsigned long log_batch
;
1113 pid_t log_start_pid
;
1114 bool log_multiple_pids
;
1119 /* data allocations are done in sectorsize units */
1122 /* node allocations are done in nodesize units */
1125 /* leaf allocations are done in leafsize units */
1132 u64 highest_objectid
;
1137 u64 defrag_trans_start
;
1138 struct btrfs_key defrag_progress
;
1139 struct btrfs_key defrag_max
;
1144 /* the dirty list is only used by non-reference counted roots */
1145 struct list_head dirty_list
;
1147 struct list_head root_list
;
1149 spinlock_t orphan_lock
;
1150 struct list_head orphan_list
;
1151 struct btrfs_block_rsv
*orphan_block_rsv
;
1152 int orphan_item_inserted
;
1153 int orphan_cleanup_state
;
1155 spinlock_t inode_lock
;
1156 /* red-black tree that keeps track of in-memory inodes */
1157 struct rb_root inode_tree
;
1160 * right now this just gets used so that a root has its own devid
1161 * for stat. It may be used for more later
1163 struct super_block anon_super
;
1167 * inode items have the data typically returned from stat and store other
1168 * info about object characteristics. There is one for every file and dir in
1171 #define BTRFS_INODE_ITEM_KEY 1
1172 #define BTRFS_INODE_REF_KEY 12
1173 #define BTRFS_XATTR_ITEM_KEY 24
1174 #define BTRFS_ORPHAN_ITEM_KEY 48
1175 /* reserve 2-15 close to the inode for later flexibility */
1178 * dir items are the name -> inode pointers in a directory. There is one
1179 * for every name in a directory.
1181 #define BTRFS_DIR_LOG_ITEM_KEY 60
1182 #define BTRFS_DIR_LOG_INDEX_KEY 72
1183 #define BTRFS_DIR_ITEM_KEY 84
1184 #define BTRFS_DIR_INDEX_KEY 96
1186 * extent data is for file data
1188 #define BTRFS_EXTENT_DATA_KEY 108
1191 * extent csums are stored in a separate tree and hold csums for
1192 * an entire extent on disk.
1194 #define BTRFS_EXTENT_CSUM_KEY 128
1197 * root items point to tree roots. They are typically in the root
1198 * tree used by the super block to find all the other trees
1200 #define BTRFS_ROOT_ITEM_KEY 132
1203 * root backrefs tie subvols and snapshots to the directory entries that
1206 #define BTRFS_ROOT_BACKREF_KEY 144
1209 * root refs make a fast index for listing all of the snapshots and
1210 * subvolumes referenced by a given root. They point directly to the
1211 * directory item in the root that references the subvol
1213 #define BTRFS_ROOT_REF_KEY 156
1216 * extent items are in the extent map tree. These record which blocks
1217 * are used, and how many references there are to each block
1219 #define BTRFS_EXTENT_ITEM_KEY 168
1221 #define BTRFS_TREE_BLOCK_REF_KEY 176
1223 #define BTRFS_EXTENT_DATA_REF_KEY 178
1225 #define BTRFS_EXTENT_REF_V0_KEY 180
1227 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1229 #define BTRFS_SHARED_DATA_REF_KEY 184
1232 * block groups give us hints into the extent allocation trees. Which
1233 * blocks are free etc etc
1235 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1237 #define BTRFS_DEV_EXTENT_KEY 204
1238 #define BTRFS_DEV_ITEM_KEY 216
1239 #define BTRFS_CHUNK_ITEM_KEY 228
1242 * string items are for debugging. They just store a short string of
1245 #define BTRFS_STRING_ITEM_KEY 253
1247 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1248 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1249 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1250 #define BTRFS_MOUNT_SSD (1 << 3)
1251 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1252 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1253 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1254 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1255 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1256 #define BTRFS_MOUNT_NOSSD (1 << 9)
1257 #define BTRFS_MOUNT_DISCARD (1 << 10)
1258 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1259 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1260 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1261 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1262 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1264 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1265 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1266 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1271 #define BTRFS_INODE_NODATASUM (1 << 0)
1272 #define BTRFS_INODE_NODATACOW (1 << 1)
1273 #define BTRFS_INODE_READONLY (1 << 2)
1274 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1275 #define BTRFS_INODE_PREALLOC (1 << 4)
1276 #define BTRFS_INODE_SYNC (1 << 5)
1277 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1278 #define BTRFS_INODE_APPEND (1 << 7)
1279 #define BTRFS_INODE_NODUMP (1 << 8)
1280 #define BTRFS_INODE_NOATIME (1 << 9)
1281 #define BTRFS_INODE_DIRSYNC (1 << 10)
1282 #define BTRFS_INODE_COMPRESS (1 << 11)
1284 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1286 /* some macros to generate set/get funcs for the struct fields. This
1287 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1290 #define le8_to_cpu(v) (v)
1291 #define cpu_to_le8(v) (v)
1294 #define read_eb_member(eb, ptr, type, member, result) ( \
1295 read_extent_buffer(eb, (char *)(result), \
1296 ((unsigned long)(ptr)) + \
1297 offsetof(type, member), \
1298 sizeof(((type *)0)->member)))
1300 #define write_eb_member(eb, ptr, type, member, result) ( \
1301 write_extent_buffer(eb, (char *)(result), \
1302 ((unsigned long)(ptr)) + \
1303 offsetof(type, member), \
1304 sizeof(((type *)0)->member)))
1306 #ifndef BTRFS_SETGET_FUNCS
1307 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1308 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1309 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1312 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1313 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1315 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1316 u##bits res = le##bits##_to_cpu(p->member); \
1317 kunmap_atomic(p, KM_USER0); \
1320 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1323 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1324 p->member = cpu_to_le##bits(val); \
1325 kunmap_atomic(p, KM_USER0); \
1328 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1329 static inline u##bits btrfs_##name(type *s) \
1331 return le##bits##_to_cpu(s->member); \
1333 static inline void btrfs_set_##name(type *s, u##bits val) \
1335 s->member = cpu_to_le##bits(val); \
1338 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1339 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1340 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1341 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1342 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1343 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1345 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1346 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1347 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1348 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1349 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1350 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1352 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1353 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1355 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1357 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1359 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1361 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1363 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1364 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1366 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1368 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1370 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1373 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1375 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1378 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1380 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1383 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1384 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1385 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1386 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1387 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1388 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1389 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1390 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1391 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1392 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1393 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1395 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1397 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1400 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1401 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1402 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1404 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1406 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1408 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1410 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1411 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1413 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1415 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1416 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1418 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1421 unsigned long offset
= (unsigned long)c
;
1422 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1423 offset
+= nr
* sizeof(struct btrfs_stripe
);
1424 return (struct btrfs_stripe
*)offset
;
1427 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1429 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1432 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1433 struct btrfs_chunk
*c
, int nr
)
1435 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1438 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1439 struct btrfs_chunk
*c
, int nr
,
1442 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1445 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1446 struct btrfs_chunk
*c
, int nr
)
1448 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1451 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1452 struct btrfs_chunk
*c
, int nr
,
1455 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1458 /* struct btrfs_block_group_item */
1459 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1461 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1463 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1464 struct btrfs_block_group_item
, chunk_objectid
, 64);
1466 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1467 struct btrfs_block_group_item
, chunk_objectid
, 64);
1468 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1469 struct btrfs_block_group_item
, flags
, 64);
1470 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1471 struct btrfs_block_group_item
, flags
, 64);
1473 /* struct btrfs_inode_ref */
1474 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1475 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1477 /* struct btrfs_inode_item */
1478 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1479 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1480 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1481 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1482 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1483 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1484 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1485 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1486 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1487 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1488 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1489 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1491 static inline struct btrfs_timespec
*
1492 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1494 unsigned long ptr
= (unsigned long)inode_item
;
1495 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1496 return (struct btrfs_timespec
*)ptr
;
1499 static inline struct btrfs_timespec
*
1500 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1502 unsigned long ptr
= (unsigned long)inode_item
;
1503 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1504 return (struct btrfs_timespec
*)ptr
;
1507 static inline struct btrfs_timespec
*
1508 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1510 unsigned long ptr
= (unsigned long)inode_item
;
1511 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1512 return (struct btrfs_timespec
*)ptr
;
1515 static inline struct btrfs_timespec
*
1516 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1518 unsigned long ptr
= (unsigned long)inode_item
;
1519 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1520 return (struct btrfs_timespec
*)ptr
;
1523 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1524 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1526 /* struct btrfs_dev_extent */
1527 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1529 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1530 chunk_objectid
, 64);
1531 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1533 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1535 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1537 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1538 return (u8
*)((unsigned long)dev
+ ptr
);
1541 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1542 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1544 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1546 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1549 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1551 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1552 struct btrfs_tree_block_info
*item
,
1553 struct btrfs_disk_key
*key
)
1555 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1558 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1559 struct btrfs_tree_block_info
*item
,
1560 struct btrfs_disk_key
*key
)
1562 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1565 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1567 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1569 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1571 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1574 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1577 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1579 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1582 static inline u32
btrfs_extent_inline_ref_size(int type
)
1584 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1585 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1586 return sizeof(struct btrfs_extent_inline_ref
);
1587 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1588 return sizeof(struct btrfs_shared_data_ref
) +
1589 sizeof(struct btrfs_extent_inline_ref
);
1590 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1591 return sizeof(struct btrfs_extent_data_ref
) +
1592 offsetof(struct btrfs_extent_inline_ref
, offset
);
1597 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1598 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1600 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1601 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1603 /* struct btrfs_node */
1604 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1605 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1607 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1610 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1611 sizeof(struct btrfs_key_ptr
) * nr
;
1612 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1615 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1619 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1620 sizeof(struct btrfs_key_ptr
) * nr
;
1621 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1624 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1627 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1628 sizeof(struct btrfs_key_ptr
) * nr
;
1629 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1632 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1636 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1637 sizeof(struct btrfs_key_ptr
) * nr
;
1638 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1641 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1643 return offsetof(struct btrfs_node
, ptrs
) +
1644 sizeof(struct btrfs_key_ptr
) * nr
;
1647 void btrfs_node_key(struct extent_buffer
*eb
,
1648 struct btrfs_disk_key
*disk_key
, int nr
);
1650 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1651 struct btrfs_disk_key
*disk_key
, int nr
)
1654 ptr
= btrfs_node_key_ptr_offset(nr
);
1655 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1656 struct btrfs_key_ptr
, key
, disk_key
);
1659 /* struct btrfs_item */
1660 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1661 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1663 static inline unsigned long btrfs_item_nr_offset(int nr
)
1665 return offsetof(struct btrfs_leaf
, items
) +
1666 sizeof(struct btrfs_item
) * nr
;
1669 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1672 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1675 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1676 struct btrfs_item
*item
)
1678 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1681 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1683 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1686 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1688 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1691 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1693 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1696 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1697 struct btrfs_disk_key
*disk_key
, int nr
)
1699 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1700 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1703 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1704 struct btrfs_disk_key
*disk_key
, int nr
)
1706 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1707 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1710 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1713 * struct btrfs_root_ref
1715 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1716 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1717 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1719 /* struct btrfs_dir_item */
1720 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1721 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1722 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1723 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1725 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1726 struct btrfs_dir_item
*item
,
1727 struct btrfs_disk_key
*key
)
1729 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1732 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1733 struct btrfs_dir_item
*item
,
1734 struct btrfs_disk_key
*key
)
1736 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1739 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1741 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1743 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1746 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1747 struct btrfs_free_space_header
*h
,
1748 struct btrfs_disk_key
*key
)
1750 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1753 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1754 struct btrfs_free_space_header
*h
,
1755 struct btrfs_disk_key
*key
)
1757 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1760 /* struct btrfs_disk_key */
1761 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1763 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1764 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1766 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1767 struct btrfs_disk_key
*disk
)
1769 cpu
->offset
= le64_to_cpu(disk
->offset
);
1770 cpu
->type
= disk
->type
;
1771 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1774 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1775 struct btrfs_key
*cpu
)
1777 disk
->offset
= cpu_to_le64(cpu
->offset
);
1778 disk
->type
= cpu
->type
;
1779 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1782 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1783 struct btrfs_key
*key
, int nr
)
1785 struct btrfs_disk_key disk_key
;
1786 btrfs_node_key(eb
, &disk_key
, nr
);
1787 btrfs_disk_key_to_cpu(key
, &disk_key
);
1790 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1791 struct btrfs_key
*key
, int nr
)
1793 struct btrfs_disk_key disk_key
;
1794 btrfs_item_key(eb
, &disk_key
, nr
);
1795 btrfs_disk_key_to_cpu(key
, &disk_key
);
1798 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1799 struct btrfs_dir_item
*item
,
1800 struct btrfs_key
*key
)
1802 struct btrfs_disk_key disk_key
;
1803 btrfs_dir_item_key(eb
, item
, &disk_key
);
1804 btrfs_disk_key_to_cpu(key
, &disk_key
);
1808 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1813 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1818 /* struct btrfs_header */
1819 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1820 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1822 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1823 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1824 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1825 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1827 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1829 return (btrfs_header_flags(eb
) & flag
) == flag
;
1832 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1834 u64 flags
= btrfs_header_flags(eb
);
1835 btrfs_set_header_flags(eb
, flags
| flag
);
1836 return (flags
& flag
) == flag
;
1839 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1841 u64 flags
= btrfs_header_flags(eb
);
1842 btrfs_set_header_flags(eb
, flags
& ~flag
);
1843 return (flags
& flag
) == flag
;
1846 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1848 u64 flags
= btrfs_header_flags(eb
);
1849 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1852 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1855 u64 flags
= btrfs_header_flags(eb
);
1856 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1857 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1858 btrfs_set_header_flags(eb
, flags
);
1861 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1863 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1867 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1869 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1873 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1875 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1879 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1881 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1885 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1890 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1895 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1900 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1902 return btrfs_header_level(eb
) == 0;
1905 /* struct btrfs_root_item */
1906 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1908 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1909 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1910 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1912 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1914 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1915 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1916 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1917 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1918 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1919 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1920 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1921 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1924 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
1926 return root
->root_item
.flags
& BTRFS_ROOT_SUBVOL_RDONLY
;
1929 /* struct btrfs_super_block */
1931 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1932 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1933 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1935 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1936 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1937 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1938 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1939 struct btrfs_super_block
, chunk_root_generation
, 64);
1940 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1942 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1944 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1945 chunk_root_level
, 8);
1946 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1948 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1949 log_root_transid
, 64);
1950 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1952 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1954 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1956 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1958 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1960 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1962 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1964 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1965 root_dir_objectid
, 64);
1966 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1968 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1970 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1971 compat_ro_flags
, 64);
1972 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1973 incompat_flags
, 64);
1974 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1976 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
1977 cache_generation
, 64);
1979 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1981 int t
= btrfs_super_csum_type(s
);
1982 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1983 return btrfs_csum_sizes
[t
];
1986 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1988 return offsetof(struct btrfs_leaf
, items
);
1991 /* struct btrfs_file_extent_item */
1992 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1994 static inline unsigned long
1995 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
1997 unsigned long offset
= (unsigned long)e
;
1998 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2002 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2004 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2007 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2009 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2011 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2012 disk_num_bytes
, 64);
2013 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2015 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2017 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2019 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2021 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2023 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2024 other_encoding
, 16);
2026 /* this returns the number of file bytes represented by the inline item.
2027 * If an item is compressed, this is the uncompressed size
2029 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2030 struct btrfs_file_extent_item
*e
)
2032 return btrfs_file_extent_ram_bytes(eb
, e
);
2036 * this returns the number of bytes used by the item on disk, minus the
2037 * size of any extent headers. If a file is compressed on disk, this is
2038 * the compressed size
2040 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2041 struct btrfs_item
*e
)
2043 unsigned long offset
;
2044 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2045 return btrfs_item_size(eb
, e
) - offset
;
2048 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
2050 return sb
->s_fs_info
;
2053 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
2054 const char *name
, int len
)
2056 /* if we already have a name just free it */
2059 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
2063 memcpy(root
->name
, name
, len
);
2064 root
->name
[len
] = '\0';
2069 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2072 return root
->leafsize
;
2073 return root
->nodesize
;
2076 /* helper function to cast into the data area of the leaf. */
2077 #define btrfs_item_ptr(leaf, slot, type) \
2078 ((type *)(btrfs_leaf_data(leaf) + \
2079 btrfs_item_offset_nr(leaf, slot)))
2081 #define btrfs_item_ptr_offset(leaf, slot) \
2082 ((unsigned long)(btrfs_leaf_data(leaf) + \
2083 btrfs_item_offset_nr(leaf, slot)))
2085 static inline struct dentry
*fdentry(struct file
*file
)
2087 return file
->f_path
.dentry
;
2090 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2092 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2093 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2097 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2098 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2099 struct btrfs_root
*root
, unsigned long count
);
2100 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2101 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2102 struct btrfs_root
*root
, u64 bytenr
,
2103 u64 num_bytes
, u64
*refs
, u64
*flags
);
2104 int btrfs_pin_extent(struct btrfs_root
*root
,
2105 u64 bytenr
, u64 num
, int reserved
);
2106 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
2107 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2108 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2109 struct btrfs_root
*root
,
2110 u64 objectid
, u64 offset
, u64 bytenr
);
2111 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
2112 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2113 struct btrfs_fs_info
*info
,
2115 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2116 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2117 u64 search_start
, u64 search_hint
, int owner
);
2118 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2119 struct btrfs_root
*root
, u32 blocksize
,
2120 u64 parent
, u64 root_objectid
,
2121 struct btrfs_disk_key
*key
, int level
,
2122 u64 hint
, u64 empty_size
);
2123 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2124 struct btrfs_root
*root
,
2125 struct extent_buffer
*buf
,
2126 u64 parent
, int last_ref
);
2127 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2128 struct btrfs_root
*root
,
2129 u64 bytenr
, u32 blocksize
,
2131 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2132 struct btrfs_root
*root
,
2133 u64 root_objectid
, u64 owner
,
2134 u64 offset
, struct btrfs_key
*ins
);
2135 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2136 struct btrfs_root
*root
,
2137 u64 root_objectid
, u64 owner
, u64 offset
,
2138 struct btrfs_key
*ins
);
2139 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2140 struct btrfs_root
*root
,
2141 u64 num_bytes
, u64 min_alloc_size
,
2142 u64 empty_size
, u64 hint_byte
,
2143 u64 search_end
, struct btrfs_key
*ins
,
2145 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2146 struct extent_buffer
*buf
, int full_backref
);
2147 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2148 struct extent_buffer
*buf
, int full_backref
);
2149 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2150 struct btrfs_root
*root
,
2151 u64 bytenr
, u64 num_bytes
, u64 flags
,
2153 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2154 struct btrfs_root
*root
,
2155 u64 bytenr
, u64 num_bytes
, u64 parent
,
2156 u64 root_objectid
, u64 owner
, u64 offset
);
2158 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2159 int btrfs_update_reserved_bytes(struct btrfs_block_group_cache
*cache
,
2160 u64 num_bytes
, int reserve
, int sinfo
);
2161 int btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2162 struct btrfs_root
*root
);
2163 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2164 struct btrfs_root
*root
);
2165 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2166 struct btrfs_root
*root
,
2167 u64 bytenr
, u64 num_bytes
, u64 parent
,
2168 u64 root_objectid
, u64 owner
, u64 offset
);
2170 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2171 struct btrfs_root
*root
);
2172 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2173 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2174 int btrfs_read_block_groups(struct btrfs_root
*root
);
2175 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2176 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2177 struct btrfs_root
*root
, u64 bytes_used
,
2178 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2180 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2181 struct btrfs_root
*root
, u64 group_start
);
2182 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2183 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2184 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2185 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2186 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
2187 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
2188 int btrfs_trans_reserve_metadata(struct btrfs_trans_handle
*trans
,
2189 struct btrfs_root
*root
,
2191 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2192 struct btrfs_root
*root
);
2193 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2194 struct inode
*inode
);
2195 void btrfs_orphan_release_metadata(struct inode
*inode
);
2196 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
2197 struct btrfs_pending_snapshot
*pending
);
2198 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2199 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2200 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
2201 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
2202 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2203 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2204 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2205 struct btrfs_block_rsv
*rsv
);
2206 void btrfs_add_durable_block_rsv(struct btrfs_fs_info
*fs_info
,
2207 struct btrfs_block_rsv
*rsv
);
2208 int btrfs_block_rsv_add(struct btrfs_trans_handle
*trans
,
2209 struct btrfs_root
*root
,
2210 struct btrfs_block_rsv
*block_rsv
,
2212 int btrfs_block_rsv_check(struct btrfs_trans_handle
*trans
,
2213 struct btrfs_root
*root
,
2214 struct btrfs_block_rsv
*block_rsv
,
2215 u64 min_reserved
, int min_factor
);
2216 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2217 struct btrfs_block_rsv
*dst_rsv
,
2219 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2220 struct btrfs_block_rsv
*block_rsv
,
2222 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2223 struct btrfs_block_group_cache
*cache
);
2224 int btrfs_set_block_group_rw(struct btrfs_root
*root
,
2225 struct btrfs_block_group_cache
*cache
);
2226 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2227 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2228 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2229 u64 start
, u64 end
);
2230 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2231 u64 num_bytes
, u64
*actual_bytes
);
2232 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2233 struct btrfs_root
*root
, u64 type
);
2234 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
2236 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2238 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2239 int level
, int *slot
);
2240 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2241 int btrfs_previous_item(struct btrfs_root
*root
,
2242 struct btrfs_path
*path
, u64 min_objectid
,
2244 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2245 struct btrfs_root
*root
, struct btrfs_path
*path
,
2246 struct btrfs_key
*new_key
);
2247 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2248 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2249 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2250 struct btrfs_key
*key
, int lowest_level
,
2251 int cache_only
, u64 min_trans
);
2252 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2253 struct btrfs_key
*max_key
,
2254 struct btrfs_path
*path
, int cache_only
,
2256 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2257 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2258 struct extent_buffer
*parent
, int parent_slot
,
2259 struct extent_buffer
**cow_ret
);
2260 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2261 struct btrfs_root
*root
,
2262 struct extent_buffer
*buf
,
2263 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2264 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2265 struct extent_buffer
*buf
);
2266 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2267 *root
, struct btrfs_path
*path
, u32 data_size
);
2268 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2269 struct btrfs_root
*root
,
2270 struct btrfs_path
*path
,
2271 u32 new_size
, int from_end
);
2272 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2273 struct btrfs_root
*root
,
2274 struct btrfs_path
*path
,
2275 struct btrfs_key
*new_key
,
2276 unsigned long split_offset
);
2277 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2278 struct btrfs_root
*root
,
2279 struct btrfs_path
*path
,
2280 struct btrfs_key
*new_key
);
2281 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2282 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2284 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2285 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2286 int start_slot
, int cache_only
, u64
*last_ret
,
2287 struct btrfs_key
*progress
);
2288 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
2289 struct btrfs_path
*btrfs_alloc_path(void);
2290 void btrfs_free_path(struct btrfs_path
*p
);
2291 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2292 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2294 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2295 struct btrfs_path
*path
, int slot
, int nr
);
2296 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2297 struct btrfs_root
*root
,
2298 struct btrfs_path
*path
)
2300 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2303 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2304 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2305 int btrfs_insert_some_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
,
2310 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2311 struct btrfs_root
*root
,
2312 struct btrfs_path
*path
,
2313 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2315 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2316 struct btrfs_root
*root
,
2317 struct btrfs_path
*path
,
2318 struct btrfs_key
*key
,
2321 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2324 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2325 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2326 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2327 int btrfs_drop_snapshot(struct btrfs_root
*root
,
2328 struct btrfs_block_rsv
*block_rsv
, int update_ref
);
2329 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2330 struct btrfs_root
*root
,
2331 struct extent_buffer
*node
,
2332 struct extent_buffer
*parent
);
2334 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2335 struct btrfs_path
*path
,
2336 u64 root_id
, u64 ref_id
);
2337 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2338 struct btrfs_root
*tree_root
,
2339 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2340 const char *name
, int name_len
);
2341 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2342 struct btrfs_root
*tree_root
,
2343 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2344 const char *name
, int name_len
);
2345 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2346 struct btrfs_key
*key
);
2347 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2348 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2350 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2351 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2353 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2354 btrfs_root_item
*item
, struct btrfs_key
*key
);
2355 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
2356 u64
*found_objectid
);
2357 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2358 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2359 int btrfs_set_root_node(struct btrfs_root_item
*item
,
2360 struct extent_buffer
*node
);
2361 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2364 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2365 struct btrfs_root
*root
, const char *name
,
2366 int name_len
, u64 dir
,
2367 struct btrfs_key
*location
, u8 type
, u64 index
);
2368 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2369 struct btrfs_root
*root
,
2370 struct btrfs_path
*path
, u64 dir
,
2371 const char *name
, int name_len
,
2373 struct btrfs_dir_item
*
2374 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2375 struct btrfs_root
*root
,
2376 struct btrfs_path
*path
, u64 dir
,
2377 u64 objectid
, const char *name
, int name_len
,
2379 struct btrfs_dir_item
*
2380 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2381 struct btrfs_path
*path
, u64 dirid
,
2382 const char *name
, int name_len
);
2383 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2384 struct btrfs_path
*path
,
2385 const char *name
, int name_len
);
2386 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2387 struct btrfs_root
*root
,
2388 struct btrfs_path
*path
,
2389 struct btrfs_dir_item
*di
);
2390 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2391 struct btrfs_root
*root
,
2392 struct btrfs_path
*path
, u64 objectid
,
2393 const char *name
, u16 name_len
,
2394 const void *data
, u16 data_len
);
2395 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2396 struct btrfs_root
*root
,
2397 struct btrfs_path
*path
, u64 dir
,
2398 const char *name
, u16 name_len
,
2400 int verify_dir_item(struct btrfs_root
*root
,
2401 struct extent_buffer
*leaf
,
2402 struct btrfs_dir_item
*dir_item
);
2405 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2406 struct btrfs_root
*root
, u64 offset
);
2407 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2408 struct btrfs_root
*root
, u64 offset
);
2409 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2412 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2413 struct btrfs_root
*fs_root
,
2414 u64 dirid
, u64
*objectid
);
2415 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2418 int btrfs_insert_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 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2423 struct btrfs_root
*root
,
2424 const char *name
, int name_len
,
2425 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2426 struct btrfs_inode_ref
*
2427 btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2428 struct btrfs_root
*root
,
2429 struct btrfs_path
*path
,
2430 const char *name
, int name_len
,
2431 u64 inode_objectid
, u64 ref_objectid
, int mod
);
2432 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2433 struct btrfs_root
*root
,
2434 struct btrfs_path
*path
, u64 objectid
);
2435 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2436 *root
, struct btrfs_path
*path
,
2437 struct btrfs_key
*location
, int mod
);
2440 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2441 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2442 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2443 struct bio
*bio
, u32
*dst
);
2444 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
2445 struct bio
*bio
, u64 logical_offset
, u32
*dst
);
2446 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2447 struct btrfs_root
*root
,
2448 u64 objectid
, u64 pos
,
2449 u64 disk_offset
, u64 disk_num_bytes
,
2450 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2451 u8 compression
, u8 encryption
, u16 other_encoding
);
2452 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2453 struct btrfs_root
*root
,
2454 struct btrfs_path
*path
, u64 objectid
,
2455 u64 bytenr
, int mod
);
2456 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2457 struct btrfs_root
*root
,
2458 struct btrfs_ordered_sum
*sums
);
2459 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2460 struct bio
*bio
, u64 file_start
, int contig
);
2461 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
2462 u64 start
, unsigned long len
);
2463 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2464 struct btrfs_root
*root
,
2465 struct btrfs_path
*path
,
2466 u64 bytenr
, int cow
);
2467 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2468 struct btrfs_root
*root
, struct btrfs_path
*path
,
2470 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
2471 u64 end
, struct list_head
*list
);
2474 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2475 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2476 #define ClearPageChecked ClearPageFsMisc
2477 #define SetPageChecked SetPageFsMisc
2478 #define PageChecked PageFsMisc
2481 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2482 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2483 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2484 struct btrfs_root
*root
,
2485 struct inode
*dir
, struct inode
*inode
,
2486 const char *name
, int name_len
);
2487 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2488 struct inode
*parent_inode
, struct inode
*inode
,
2489 const char *name
, int name_len
, int add_backref
, u64 index
);
2490 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2491 struct btrfs_root
*root
,
2492 struct inode
*dir
, u64 objectid
,
2493 const char *name
, int name_len
);
2494 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2495 struct btrfs_root
*root
,
2496 struct inode
*inode
, u64 new_size
,
2499 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2500 int btrfs_start_one_delalloc_inode(struct btrfs_root
*root
, int delay_iput
,
2502 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
2503 struct extent_state
**cached_state
);
2504 int btrfs_writepages(struct address_space
*mapping
,
2505 struct writeback_control
*wbc
);
2506 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2507 struct btrfs_root
*new_root
,
2508 u64 new_dirid
, u64 alloc_hint
);
2509 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2510 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2512 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2513 struct file_ra_state
*ra
, struct file
*file
,
2514 pgoff_t offset
, pgoff_t last_index
);
2515 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2516 int btrfs_readpage(struct file
*file
, struct page
*page
);
2517 void btrfs_evict_inode(struct inode
*inode
);
2518 void btrfs_put_inode(struct inode
*inode
);
2519 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
2520 void btrfs_dirty_inode(struct inode
*inode
);
2521 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2522 void btrfs_destroy_inode(struct inode
*inode
);
2523 int btrfs_drop_inode(struct inode
*inode
);
2524 int btrfs_init_cachep(void);
2525 void btrfs_destroy_cachep(void);
2526 long btrfs_ioctl_trans_end(struct file
*file
);
2527 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2528 struct btrfs_root
*root
, int *was_new
);
2529 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2530 unsigned from
, unsigned to
);
2531 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2532 size_t page_offset
, u64 start
, u64 end
,
2534 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2535 struct btrfs_root
*root
,
2536 struct inode
*inode
);
2537 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2538 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2539 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
2540 void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle
*trans
,
2541 struct btrfs_pending_snapshot
*pending
,
2542 u64
*bytes_to_reserve
);
2543 void btrfs_orphan_post_snapshot(struct btrfs_trans_handle
*trans
,
2544 struct btrfs_pending_snapshot
*pending
);
2545 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
2546 struct btrfs_root
*root
);
2547 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
2548 int btrfs_invalidate_inodes(struct btrfs_root
*root
);
2549 void btrfs_add_delayed_iput(struct inode
*inode
);
2550 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
2551 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
2552 u64 start
, u64 num_bytes
, u64 min_size
,
2553 loff_t actual_len
, u64
*alloc_hint
);
2554 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
2555 struct btrfs_trans_handle
*trans
, int mode
,
2556 u64 start
, u64 num_bytes
, u64 min_size
,
2557 loff_t actual_len
, u64
*alloc_hint
);
2558 extern const struct dentry_operations btrfs_dentry_operations
;
2561 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2562 void btrfs_update_iflags(struct inode
*inode
);
2563 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2566 int btrfs_sync_file(struct file
*file
, int datasync
);
2567 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2569 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2570 extern const struct file_operations btrfs_file_operations
;
2571 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
2572 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
2573 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2574 struct inode
*inode
, u64 start
, u64 end
);
2575 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2576 void btrfs_drop_pages(struct page
**pages
, size_t num_pages
);
2577 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
2578 struct page
**pages
, size_t num_pages
,
2579 loff_t pos
, size_t write_bytes
,
2580 struct extent_state
**cached
);
2583 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2584 struct btrfs_root
*root
, int cache_only
);
2587 int btrfs_init_sysfs(void);
2588 void btrfs_exit_sysfs(void);
2589 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2590 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2591 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2592 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2595 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2598 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2599 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2600 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
2601 unsigned int line
, int errno
);
2603 #define btrfs_std_error(fs_info, errno) \
2606 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2610 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2611 int btrfs_check_acl(struct inode
*inode
, int mask
, unsigned int flags
);
2613 #define btrfs_check_acl NULL
2615 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2616 struct inode
*inode
, struct inode
*dir
);
2617 int btrfs_acl_chmod(struct inode
*inode
);
2620 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
2621 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
2622 struct btrfs_root
*root
);
2623 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
2624 struct btrfs_root
*root
);
2625 int btrfs_recover_relocation(struct btrfs_root
*root
);
2626 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
2627 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
2628 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2629 struct extent_buffer
*cow
);
2630 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
2631 struct btrfs_pending_snapshot
*pending
,
2632 u64
*bytes_to_reserve
);
2633 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
2634 struct btrfs_pending_snapshot
*pending
);