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__
23 #include <linux/highmem.h>
25 #include <linux/rwsem.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 <linux/pagemap.h>
34 #include "extent_io.h"
35 #include "extent_map.h"
36 #include "async-thread.h"
39 struct btrfs_trans_handle
;
40 struct btrfs_transaction
;
41 struct btrfs_pending_snapshot
;
42 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
43 extern struct kmem_cache
*btrfs_transaction_cachep
;
44 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
45 extern struct kmem_cache
*btrfs_path_cachep
;
46 extern struct kmem_cache
*btrfs_free_space_cachep
;
47 struct btrfs_ordered_sum
;
49 #define BTRFS_MAGIC "_BHRfS_M"
51 #define BTRFS_MAX_LEVEL 8
53 #define BTRFS_COMPAT_EXTENT_TREE_V0
56 * files bigger than this get some pre-flushing when they are added
57 * to the ordered operations list. That way we limit the total
58 * work done by the commit
60 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
62 /* holds pointers to all of the tree roots */
63 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
65 /* stores information about which extents are in use, and reference counts */
66 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
69 * chunk tree stores translations from logical -> physical block numbering
70 * the super block points to the chunk tree
72 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
75 * stores information about which areas of a given device are in use.
76 * one per device. The tree of tree roots points to the device tree
78 #define BTRFS_DEV_TREE_OBJECTID 4ULL
80 /* one per subvolume, storing files and directories */
81 #define BTRFS_FS_TREE_OBJECTID 5ULL
83 /* directory objectid inside the root tree */
84 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
86 /* holds checksums of all the data extents */
87 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
89 /* orhpan objectid for tracking unlinked/truncated files */
90 #define BTRFS_ORPHAN_OBJECTID -5ULL
92 /* does write ahead logging to speed up fsyncs */
93 #define BTRFS_TREE_LOG_OBJECTID -6ULL
94 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
96 /* for space balancing */
97 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
98 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
101 * extent checksums all have this objectid
102 * this allows them to share the logging tree
105 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
107 /* For storing free space cache */
108 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
111 * The inode number assigned to the special inode for sotring
114 #define BTRFS_FREE_INO_OBJECTID -12ULL
116 /* dummy objectid represents multiple objectids */
117 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
120 * All files have objectids in this range.
122 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
123 #define BTRFS_LAST_FREE_OBJECTID -256ULL
124 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
128 * the device items go into the chunk tree. The key is in the form
129 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
131 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
133 #define BTRFS_BTREE_INODE_OBJECTID 1
135 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
138 * we can actually store much bigger names, but lets not confuse the rest
141 #define BTRFS_NAME_LEN 255
143 /* 32 bytes in various csum fields */
144 #define BTRFS_CSUM_SIZE 32
147 #define BTRFS_CSUM_TYPE_CRC32 0
149 static int btrfs_csum_sizes
[] = { 4, 0 };
151 /* four bytes for CRC32 */
152 #define BTRFS_EMPTY_DIR_SIZE 0
154 #define BTRFS_FT_UNKNOWN 0
155 #define BTRFS_FT_REG_FILE 1
156 #define BTRFS_FT_DIR 2
157 #define BTRFS_FT_CHRDEV 3
158 #define BTRFS_FT_BLKDEV 4
159 #define BTRFS_FT_FIFO 5
160 #define BTRFS_FT_SOCK 6
161 #define BTRFS_FT_SYMLINK 7
162 #define BTRFS_FT_XATTR 8
163 #define BTRFS_FT_MAX 9
166 * The key defines the order in the tree, and so it also defines (optimal)
169 * objectid corresponds to the inode number.
171 * type tells us things about the object, and is a kind of stream selector.
172 * so for a given inode, keys with type of 1 might refer to the inode data,
173 * type of 2 may point to file data in the btree and type == 3 may point to
176 * offset is the starting byte offset for this key in the stream.
178 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
179 * in cpu native order. Otherwise they are identical and their sizes
180 * should be the same (ie both packed)
182 struct btrfs_disk_key
{
186 } __attribute__ ((__packed__
));
192 } __attribute__ ((__packed__
));
194 struct btrfs_mapping_tree
{
195 struct extent_map_tree map_tree
;
198 struct btrfs_dev_item
{
199 /* the internal btrfs device id */
202 /* size of the device */
208 /* optimal io alignment for this device */
211 /* optimal io width for this device */
214 /* minimal io size for this device */
217 /* type and info about this device */
220 /* expected generation for this device */
224 * starting byte of this partition on the device,
225 * to allow for stripe alignment in the future
229 /* grouping information for allocation decisions */
232 /* seek speed 0-100 where 100 is fastest */
235 /* bandwidth 0-100 where 100 is fastest */
238 /* btrfs generated uuid for this device */
239 u8 uuid
[BTRFS_UUID_SIZE
];
241 /* uuid of FS who owns this device */
242 u8 fsid
[BTRFS_UUID_SIZE
];
243 } __attribute__ ((__packed__
));
245 struct btrfs_stripe
{
248 u8 dev_uuid
[BTRFS_UUID_SIZE
];
249 } __attribute__ ((__packed__
));
252 /* size of this chunk in bytes */
255 /* objectid of the root referencing this chunk */
261 /* optimal io alignment for this chunk */
264 /* optimal io width for this chunk */
267 /* minimal io size for this chunk */
270 /* 2^16 stripes is quite a lot, a second limit is the size of a single
275 /* sub stripes only matter for raid10 */
277 struct btrfs_stripe stripe
;
278 /* additional stripes go here */
279 } __attribute__ ((__packed__
));
281 #define BTRFS_FREE_SPACE_EXTENT 1
282 #define BTRFS_FREE_SPACE_BITMAP 2
284 struct btrfs_free_space_entry
{
288 } __attribute__ ((__packed__
));
290 struct btrfs_free_space_header
{
291 struct btrfs_disk_key location
;
295 } __attribute__ ((__packed__
));
297 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
299 BUG_ON(num_stripes
== 0);
300 return sizeof(struct btrfs_chunk
) +
301 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
304 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
305 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
311 /* Errors detected */
312 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
314 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
315 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
317 #define BTRFS_BACKREF_REV_MAX 256
318 #define BTRFS_BACKREF_REV_SHIFT 56
319 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
320 BTRFS_BACKREF_REV_SHIFT)
322 #define BTRFS_OLD_BACKREF_REV 0
323 #define BTRFS_MIXED_BACKREF_REV 1
326 * every tree block (leaf or node) starts with this header.
328 struct btrfs_header
{
329 /* these first four must match the super block */
330 u8 csum
[BTRFS_CSUM_SIZE
];
331 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
332 __le64 bytenr
; /* which block this node is supposed to live in */
335 /* allowed to be different from the super from here on down */
336 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
341 } __attribute__ ((__packed__
));
343 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
344 sizeof(struct btrfs_header)) / \
345 sizeof(struct btrfs_key_ptr))
346 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
347 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
348 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
349 sizeof(struct btrfs_item) - \
350 sizeof(struct btrfs_file_extent_item))
351 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
352 sizeof(struct btrfs_item) -\
353 sizeof(struct btrfs_dir_item))
357 * this is a very generous portion of the super block, giving us
358 * room to translate 14 chunks with 3 stripes each.
360 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
361 #define BTRFS_LABEL_SIZE 256
364 * the super block basically lists the main trees of the FS
365 * it currently lacks any block count etc etc
367 struct btrfs_super_block
{
368 u8 csum
[BTRFS_CSUM_SIZE
];
369 /* the first 4 fields must match struct btrfs_header */
370 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
371 __le64 bytenr
; /* this block number */
374 /* allowed to be different from the btrfs_header from here own down */
381 /* this will help find the new super based on the log root */
382 __le64 log_root_transid
;
385 __le64 root_dir_objectid
;
391 __le32 sys_chunk_array_size
;
392 __le64 chunk_root_generation
;
394 __le64 compat_ro_flags
;
395 __le64 incompat_flags
;
400 struct btrfs_dev_item dev_item
;
402 char label
[BTRFS_LABEL_SIZE
];
404 __le64 cache_generation
;
406 /* future expansion */
408 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
409 } __attribute__ ((__packed__
));
412 * Compat flags that we support. If any incompat flags are set other than the
413 * ones specified below then we will fail to mount
415 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
416 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
417 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
418 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
420 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
421 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
422 #define BTRFS_FEATURE_INCOMPAT_SUPP \
423 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
424 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
425 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
426 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
429 * A leaf is full of items. offset and size tell us where to find
430 * the item in the leaf (relative to the start of the data area)
433 struct btrfs_disk_key key
;
436 } __attribute__ ((__packed__
));
439 * leaves have an item area and a data area:
440 * [item0, item1....itemN] [free space] [dataN...data1, data0]
442 * The data is separate from the items to get the keys closer together
446 struct btrfs_header header
;
447 struct btrfs_item items
[];
448 } __attribute__ ((__packed__
));
451 * all non-leaf blocks are nodes, they hold only keys and pointers to
454 struct btrfs_key_ptr
{
455 struct btrfs_disk_key key
;
458 } __attribute__ ((__packed__
));
461 struct btrfs_header header
;
462 struct btrfs_key_ptr ptrs
[];
463 } __attribute__ ((__packed__
));
466 * btrfs_paths remember the path taken from the root down to the leaf.
467 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
468 * to any other levels that are present.
470 * The slots array records the index of the item or block pointer
471 * used while walking the tree.
474 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
475 int slots
[BTRFS_MAX_LEVEL
];
476 /* if there is real range locking, this locks field will change */
477 int locks
[BTRFS_MAX_LEVEL
];
479 /* keep some upper locks as we walk down */
483 * set by btrfs_split_item, tells search_slot to keep all locks
484 * and to force calls to keep space in the nodes
486 unsigned int search_for_split
:1;
487 unsigned int keep_locks
:1;
488 unsigned int skip_locking
:1;
489 unsigned int leave_spinning
:1;
490 unsigned int search_commit_root
:1;
494 * items in the extent btree are used to record the objectid of the
495 * owner of the block and the number of references
498 struct btrfs_extent_item
{
502 } __attribute__ ((__packed__
));
504 struct btrfs_extent_item_v0
{
506 } __attribute__ ((__packed__
));
508 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
509 sizeof(struct btrfs_item))
511 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
512 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
514 /* following flags only apply to tree blocks */
516 /* use full backrefs for extent pointers in the block */
517 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
520 * this flag is only used internally by scrub and may be changed at any time
521 * it is only declared here to avoid collisions
523 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
525 struct btrfs_tree_block_info
{
526 struct btrfs_disk_key key
;
528 } __attribute__ ((__packed__
));
530 struct btrfs_extent_data_ref
{
535 } __attribute__ ((__packed__
));
537 struct btrfs_shared_data_ref
{
539 } __attribute__ ((__packed__
));
541 struct btrfs_extent_inline_ref
{
544 } __attribute__ ((__packed__
));
546 /* old style backrefs item */
547 struct btrfs_extent_ref_v0
{
552 } __attribute__ ((__packed__
));
555 /* dev extents record free space on individual devices. The owner
556 * field points back to the chunk allocation mapping tree that allocated
557 * the extent. The chunk tree uuid field is a way to double check the owner
559 struct btrfs_dev_extent
{
561 __le64 chunk_objectid
;
564 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
565 } __attribute__ ((__packed__
));
567 struct btrfs_inode_ref
{
571 } __attribute__ ((__packed__
));
573 struct btrfs_timespec
{
576 } __attribute__ ((__packed__
));
578 enum btrfs_compression_type
{
579 BTRFS_COMPRESS_NONE
= 0,
580 BTRFS_COMPRESS_ZLIB
= 1,
581 BTRFS_COMPRESS_LZO
= 2,
582 BTRFS_COMPRESS_TYPES
= 2,
583 BTRFS_COMPRESS_LAST
= 3,
586 struct btrfs_inode_item
{
587 /* nfs style generation number */
589 /* transid that last touched this inode */
601 /* modification sequence number for NFS */
605 * a little future expansion, for more than this we can
606 * just grow the inode item and version it
609 struct btrfs_timespec atime
;
610 struct btrfs_timespec ctime
;
611 struct btrfs_timespec mtime
;
612 struct btrfs_timespec otime
;
613 } __attribute__ ((__packed__
));
615 struct btrfs_dir_log_item
{
617 } __attribute__ ((__packed__
));
619 struct btrfs_dir_item
{
620 struct btrfs_disk_key location
;
625 } __attribute__ ((__packed__
));
627 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
629 struct btrfs_root_item
{
630 struct btrfs_inode_item inode
;
636 __le64 last_snapshot
;
639 struct btrfs_disk_key drop_progress
;
642 } __attribute__ ((__packed__
));
645 * this is used for both forward and backward root refs
647 struct btrfs_root_ref
{
651 } __attribute__ ((__packed__
));
653 #define BTRFS_FILE_EXTENT_INLINE 0
654 #define BTRFS_FILE_EXTENT_REG 1
655 #define BTRFS_FILE_EXTENT_PREALLOC 2
657 struct btrfs_file_extent_item
{
659 * transaction id that created this extent
663 * max number of bytes to hold this extent in ram
664 * when we split a compressed extent we can't know how big
665 * each of the resulting pieces will be. So, this is
666 * an upper limit on the size of the extent in ram instead of
672 * 32 bits for the various ways we might encode the data,
673 * including compression and encryption. If any of these
674 * are set to something a given disk format doesn't understand
675 * it is treated like an incompat flag for reading and writing,
680 __le16 other_encoding
; /* spare for later use */
682 /* are we inline data or a real extent? */
686 * disk space consumed by the extent, checksum blocks are included
690 __le64 disk_num_bytes
;
692 * the logical offset in file blocks (no csums)
693 * this extent record is for. This allows a file extent to point
694 * into the middle of an existing extent on disk, sharing it
695 * between two snapshots (useful if some bytes in the middle of the
696 * extent have changed
700 * the logical number of file blocks (no csums included). This
701 * always reflects the size uncompressed and without encoding.
705 } __attribute__ ((__packed__
));
707 struct btrfs_csum_item
{
709 } __attribute__ ((__packed__
));
711 /* different types of block groups (and chunks) */
712 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
713 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
714 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
715 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
716 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
717 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
718 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
719 #define BTRFS_NR_RAID_TYPES 5
721 struct btrfs_block_group_item
{
723 __le64 chunk_objectid
;
725 } __attribute__ ((__packed__
));
727 struct btrfs_space_info
{
730 u64 total_bytes
; /* total bytes in the space,
731 this doesn't take mirrors into account */
732 u64 bytes_used
; /* total bytes used,
733 this doesn't take mirrors into account */
734 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
735 transaction finishes */
736 u64 bytes_reserved
; /* total bytes the allocator has reserved for
737 current allocations */
738 u64 bytes_readonly
; /* total bytes that are read only */
740 u64 bytes_may_use
; /* number of bytes that may be used for
741 delalloc/allocations */
742 u64 disk_used
; /* total bytes used on disk */
743 u64 disk_total
; /* total bytes on disk, takes mirrors into
747 * we bump reservation progress every time we decrement
748 * bytes_reserved. This way people waiting for reservations
749 * know something good has happened and they can check
750 * for progress. The number here isn't to be trusted, it
751 * just shows reclaim activity
753 unsigned long reservation_progress
;
755 unsigned int full
:1; /* indicates that we cannot allocate any more
756 chunks for this space */
757 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
759 unsigned int flush
:1; /* set if we are trying to make space */
761 unsigned int force_alloc
; /* set if we need to force a chunk
762 alloc for this space */
764 struct list_head list
;
766 /* for block groups in our same type */
767 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
769 struct rw_semaphore groups_sem
;
770 wait_queue_head_t wait
;
773 struct btrfs_block_rsv
{
776 struct btrfs_space_info
*space_info
;
782 * free clusters are used to claim free space in relatively large chunks,
783 * allowing us to do less seeky writes. They are used for all metadata
784 * allocations and data allocations in ssd mode.
786 struct btrfs_free_cluster
{
788 spinlock_t refill_lock
;
791 /* largest extent in this cluster */
794 /* first extent starting offset */
797 struct btrfs_block_group_cache
*block_group
;
799 * when a cluster is allocated from a block group, we put the
800 * cluster onto a list in the block group so that it can
801 * be freed before the block group is freed.
803 struct list_head block_group_list
;
806 enum btrfs_caching_type
{
808 BTRFS_CACHE_STARTED
= 1,
809 BTRFS_CACHE_FINISHED
= 2,
812 enum btrfs_disk_cache_state
{
813 BTRFS_DC_WRITTEN
= 0,
817 BTRFS_DC_NEED_WRITE
= 4,
820 struct btrfs_caching_control
{
821 struct list_head list
;
823 wait_queue_head_t wait
;
824 struct btrfs_work work
;
825 struct btrfs_block_group_cache
*block_group
;
830 struct btrfs_block_group_cache
{
831 struct btrfs_key key
;
832 struct btrfs_block_group_item item
;
833 struct btrfs_fs_info
*fs_info
;
841 u64 cache_generation
;
843 unsigned int dirty
:1;
846 int disk_cache_state
;
848 /* cache tracking stuff */
850 struct btrfs_caching_control
*caching_ctl
;
851 u64 last_byte_to_unpin
;
853 struct btrfs_space_info
*space_info
;
855 /* free space cache stuff */
856 struct btrfs_free_space_ctl
*free_space_ctl
;
858 /* block group cache stuff */
859 struct rb_node cache_node
;
861 /* for block groups in the same raid type */
862 struct list_head list
;
867 /* List of struct btrfs_free_clusters for this block group.
868 * Today it will only have one thing on it, but that may change
870 struct list_head cluster_list
;
873 struct reloc_control
;
875 struct btrfs_fs_devices
;
876 struct btrfs_delayed_root
;
877 struct btrfs_fs_info
{
878 u8 fsid
[BTRFS_FSID_SIZE
];
879 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
880 struct btrfs_root
*extent_root
;
881 struct btrfs_root
*tree_root
;
882 struct btrfs_root
*chunk_root
;
883 struct btrfs_root
*dev_root
;
884 struct btrfs_root
*fs_root
;
885 struct btrfs_root
*csum_root
;
887 /* the log root tree is a directory of all the other log roots */
888 struct btrfs_root
*log_root_tree
;
890 spinlock_t fs_roots_radix_lock
;
891 struct radix_tree_root fs_roots_radix
;
893 /* block group cache stuff */
894 spinlock_t block_group_cache_lock
;
895 struct rb_root block_group_cache_tree
;
897 /* keep track of unallocated space */
898 spinlock_t free_chunk_lock
;
899 u64 free_chunk_space
;
901 struct extent_io_tree freed_extents
[2];
902 struct extent_io_tree
*pinned_extents
;
904 /* logical->physical extent mapping */
905 struct btrfs_mapping_tree mapping_tree
;
908 * block reservation for extent, checksum, root tree and
909 * delayed dir index item
911 struct btrfs_block_rsv global_block_rsv
;
912 /* block reservation for delay allocation */
913 struct btrfs_block_rsv delalloc_block_rsv
;
914 /* block reservation for metadata operations */
915 struct btrfs_block_rsv trans_block_rsv
;
916 /* block reservation for chunk tree */
917 struct btrfs_block_rsv chunk_block_rsv
;
919 struct btrfs_block_rsv empty_block_rsv
;
922 u64 last_trans_committed
;
925 * this is updated to the current trans every time a full commit
926 * is required instead of the faster short fsync log commits
928 u64 last_trans_log_full_commit
;
929 unsigned long mount_opt
:20;
930 unsigned long compress_type
:4;
933 struct btrfs_transaction
*running_transaction
;
934 wait_queue_head_t transaction_throttle
;
935 wait_queue_head_t transaction_wait
;
936 wait_queue_head_t transaction_blocked_wait
;
937 wait_queue_head_t async_submit_wait
;
939 struct btrfs_super_block super_copy
;
940 struct btrfs_super_block super_for_commit
;
941 struct block_device
*__bdev
;
942 struct super_block
*sb
;
943 struct inode
*btree_inode
;
944 struct backing_dev_info bdi
;
945 struct mutex tree_log_mutex
;
946 struct mutex transaction_kthread_mutex
;
947 struct mutex cleaner_mutex
;
948 struct mutex chunk_mutex
;
949 struct mutex volume_mutex
;
951 * this protects the ordered operations list only while we are
952 * processing all of the entries on it. This way we make
953 * sure the commit code doesn't find the list temporarily empty
954 * because another function happens to be doing non-waiting preflush
955 * before jumping into the main commit.
957 struct mutex ordered_operations_mutex
;
958 struct rw_semaphore extent_commit_sem
;
960 struct rw_semaphore cleanup_work_sem
;
962 struct rw_semaphore subvol_sem
;
963 struct srcu_struct subvol_srcu
;
965 spinlock_t trans_lock
;
967 * the reloc mutex goes with the trans lock, it is taken
968 * during commit to protect us from the relocation code
970 struct mutex reloc_mutex
;
972 struct list_head trans_list
;
973 struct list_head hashers
;
974 struct list_head dead_roots
;
975 struct list_head caching_block_groups
;
977 spinlock_t delayed_iput_lock
;
978 struct list_head delayed_iputs
;
980 atomic_t nr_async_submits
;
981 atomic_t async_submit_draining
;
982 atomic_t nr_async_bios
;
983 atomic_t async_delalloc_pages
;
984 atomic_t open_ioctl_trans
;
987 * this is used by the balancing code to wait for all the pending
990 spinlock_t ordered_extent_lock
;
993 * all of the data=ordered extents pending writeback
994 * these can span multiple transactions and basically include
995 * every dirty data page that isn't from nodatacow
997 struct list_head ordered_extents
;
1000 * all of the inodes that have delalloc bytes. It is possible for
1001 * this list to be empty even when there is still dirty data=ordered
1002 * extents waiting to finish IO.
1004 struct list_head delalloc_inodes
;
1007 * special rename and truncate targets that must be on disk before
1008 * we're allowed to commit. This is basically the ext3 style
1009 * data=ordered list.
1011 struct list_head ordered_operations
;
1014 * there is a pool of worker threads for checksumming during writes
1015 * and a pool for checksumming after reads. This is because readers
1016 * can run with FS locks held, and the writers may be waiting for
1017 * those locks. We don't want ordering in the pending list to cause
1018 * deadlocks, and so the two are serviced separately.
1020 * A third pool does submit_bio to avoid deadlocking with the other
1023 struct btrfs_workers generic_worker
;
1024 struct btrfs_workers workers
;
1025 struct btrfs_workers delalloc_workers
;
1026 struct btrfs_workers endio_workers
;
1027 struct btrfs_workers endio_meta_workers
;
1028 struct btrfs_workers endio_meta_write_workers
;
1029 struct btrfs_workers endio_write_workers
;
1030 struct btrfs_workers endio_freespace_worker
;
1031 struct btrfs_workers submit_workers
;
1032 struct btrfs_workers caching_workers
;
1035 * fixup workers take dirty pages that didn't properly go through
1036 * the cow mechanism and make them safe to write. It happens
1037 * for the sys_munmap function call path
1039 struct btrfs_workers fixup_workers
;
1040 struct btrfs_workers delayed_workers
;
1041 struct task_struct
*transaction_kthread
;
1042 struct task_struct
*cleaner_kthread
;
1043 int thread_pool_size
;
1045 struct kobject super_kobj
;
1046 struct completion kobj_unregister
;
1049 int log_root_recovering
;
1055 /* protected by the delalloc lock, used to keep from writing
1056 * metadata until there is a nice batch
1058 u64 dirty_metadata_bytes
;
1059 struct list_head dirty_cowonly_roots
;
1061 struct btrfs_fs_devices
*fs_devices
;
1064 * the space_info list is almost entirely read only. It only changes
1065 * when we add a new raid type to the FS, and that happens
1066 * very rarely. RCU is used to protect it.
1068 struct list_head space_info
;
1070 struct reloc_control
*reloc_ctl
;
1072 spinlock_t delalloc_lock
;
1075 /* data_alloc_cluster is only used in ssd mode */
1076 struct btrfs_free_cluster data_alloc_cluster
;
1078 /* all metadata allocations go through this cluster */
1079 struct btrfs_free_cluster meta_alloc_cluster
;
1081 /* auto defrag inodes go here */
1082 spinlock_t defrag_inodes_lock
;
1083 struct rb_root defrag_inodes
;
1084 atomic_t defrag_running
;
1086 spinlock_t ref_cache_lock
;
1087 u64 total_ref_cache_size
;
1089 u64 avail_data_alloc_bits
;
1090 u64 avail_metadata_alloc_bits
;
1091 u64 avail_system_alloc_bits
;
1092 u64 data_alloc_profile
;
1093 u64 metadata_alloc_profile
;
1094 u64 system_alloc_profile
;
1096 unsigned data_chunk_allocations
;
1097 unsigned metadata_ratio
;
1101 /* private scrub information */
1102 struct mutex scrub_lock
;
1103 atomic_t scrubs_running
;
1104 atomic_t scrub_pause_req
;
1105 atomic_t scrubs_paused
;
1106 atomic_t scrub_cancel_req
;
1107 wait_queue_head_t scrub_pause_wait
;
1108 struct rw_semaphore scrub_super_lock
;
1109 int scrub_workers_refcnt
;
1110 struct btrfs_workers scrub_workers
;
1112 /* filesystem state */
1115 struct btrfs_delayed_root
*delayed_root
;
1119 * in ram representation of the tree. extent_root is used for all allocations
1120 * and for the extent tree extent_root root.
1123 struct extent_buffer
*node
;
1125 struct extent_buffer
*commit_root
;
1126 struct btrfs_root
*log_root
;
1127 struct btrfs_root
*reloc_root
;
1129 struct btrfs_root_item root_item
;
1130 struct btrfs_key root_key
;
1131 struct btrfs_fs_info
*fs_info
;
1132 struct extent_io_tree dirty_log_pages
;
1134 struct kobject root_kobj
;
1135 struct completion kobj_unregister
;
1136 struct mutex objectid_mutex
;
1138 spinlock_t accounting_lock
;
1139 struct btrfs_block_rsv
*block_rsv
;
1141 /* free ino cache stuff */
1142 struct mutex fs_commit_mutex
;
1143 struct btrfs_free_space_ctl
*free_ino_ctl
;
1144 enum btrfs_caching_type cached
;
1145 spinlock_t cache_lock
;
1146 wait_queue_head_t cache_wait
;
1147 struct btrfs_free_space_ctl
*free_ino_pinned
;
1149 struct inode
*cache_inode
;
1151 struct mutex log_mutex
;
1152 wait_queue_head_t log_writer_wait
;
1153 wait_queue_head_t log_commit_wait
[2];
1154 atomic_t log_writers
;
1155 atomic_t log_commit
[2];
1156 unsigned long log_transid
;
1157 unsigned long last_log_commit
;
1158 unsigned long log_batch
;
1159 pid_t log_start_pid
;
1160 bool log_multiple_pids
;
1165 /* data allocations are done in sectorsize units */
1168 /* node allocations are done in nodesize units */
1171 /* leaf allocations are done in leafsize units */
1178 u64 highest_objectid
;
1180 /* btrfs_record_root_in_trans is a multi-step process,
1181 * and it can race with the balancing code. But the
1182 * race is very small, and only the first time the root
1183 * is added to each transaction. So in_trans_setup
1184 * is used to tell us when more checks are required
1186 unsigned long in_trans_setup
;
1191 u64 defrag_trans_start
;
1192 struct btrfs_key defrag_progress
;
1193 struct btrfs_key defrag_max
;
1197 /* the dirty list is only used by non-reference counted roots */
1198 struct list_head dirty_list
;
1200 struct list_head root_list
;
1202 spinlock_t orphan_lock
;
1203 struct list_head orphan_list
;
1204 struct btrfs_block_rsv
*orphan_block_rsv
;
1205 int orphan_item_inserted
;
1206 int orphan_cleanup_state
;
1208 spinlock_t inode_lock
;
1209 /* red-black tree that keeps track of in-memory inodes */
1210 struct rb_root inode_tree
;
1213 * radix tree that keeps track of delayed nodes of every inode,
1214 * protected by inode_lock
1216 struct radix_tree_root delayed_nodes_tree
;
1218 * right now this just gets used so that a root has its own devid
1219 * for stat. It may be used for more later
1224 struct btrfs_ioctl_defrag_range_args
{
1225 /* start of the defrag operation */
1228 /* number of bytes to defrag, use (u64)-1 to say all */
1232 * flags for the operation, which can include turning
1233 * on compression for this one defrag
1238 * any extent bigger than this will be considered
1239 * already defragged. Use 0 to take the kernel default
1240 * Use 1 to say every single extent must be rewritten
1242 __u32 extent_thresh
;
1245 * which compression method to use if turning on compression
1246 * for this defrag operation. If unspecified, zlib will
1249 __u32 compress_type
;
1251 /* spare for later */
1257 * inode items have the data typically returned from stat and store other
1258 * info about object characteristics. There is one for every file and dir in
1261 #define BTRFS_INODE_ITEM_KEY 1
1262 #define BTRFS_INODE_REF_KEY 12
1263 #define BTRFS_XATTR_ITEM_KEY 24
1264 #define BTRFS_ORPHAN_ITEM_KEY 48
1265 /* reserve 2-15 close to the inode for later flexibility */
1268 * dir items are the name -> inode pointers in a directory. There is one
1269 * for every name in a directory.
1271 #define BTRFS_DIR_LOG_ITEM_KEY 60
1272 #define BTRFS_DIR_LOG_INDEX_KEY 72
1273 #define BTRFS_DIR_ITEM_KEY 84
1274 #define BTRFS_DIR_INDEX_KEY 96
1276 * extent data is for file data
1278 #define BTRFS_EXTENT_DATA_KEY 108
1281 * extent csums are stored in a separate tree and hold csums for
1282 * an entire extent on disk.
1284 #define BTRFS_EXTENT_CSUM_KEY 128
1287 * root items point to tree roots. They are typically in the root
1288 * tree used by the super block to find all the other trees
1290 #define BTRFS_ROOT_ITEM_KEY 132
1293 * root backrefs tie subvols and snapshots to the directory entries that
1296 #define BTRFS_ROOT_BACKREF_KEY 144
1299 * root refs make a fast index for listing all of the snapshots and
1300 * subvolumes referenced by a given root. They point directly to the
1301 * directory item in the root that references the subvol
1303 #define BTRFS_ROOT_REF_KEY 156
1306 * extent items are in the extent map tree. These record which blocks
1307 * are used, and how many references there are to each block
1309 #define BTRFS_EXTENT_ITEM_KEY 168
1311 #define BTRFS_TREE_BLOCK_REF_KEY 176
1313 #define BTRFS_EXTENT_DATA_REF_KEY 178
1315 #define BTRFS_EXTENT_REF_V0_KEY 180
1317 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1319 #define BTRFS_SHARED_DATA_REF_KEY 184
1322 * block groups give us hints into the extent allocation trees. Which
1323 * blocks are free etc etc
1325 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1327 #define BTRFS_DEV_EXTENT_KEY 204
1328 #define BTRFS_DEV_ITEM_KEY 216
1329 #define BTRFS_CHUNK_ITEM_KEY 228
1332 * string items are for debugging. They just store a short string of
1335 #define BTRFS_STRING_ITEM_KEY 253
1338 * Flags for mount options.
1340 * Note: don't forget to add new options to btrfs_show_options()
1342 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1343 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1344 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1345 #define BTRFS_MOUNT_SSD (1 << 3)
1346 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1347 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1348 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1349 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1350 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1351 #define BTRFS_MOUNT_NOSSD (1 << 9)
1352 #define BTRFS_MOUNT_DISCARD (1 << 10)
1353 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1354 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1355 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1356 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1357 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1358 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1359 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1361 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1362 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1363 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1368 #define BTRFS_INODE_NODATASUM (1 << 0)
1369 #define BTRFS_INODE_NODATACOW (1 << 1)
1370 #define BTRFS_INODE_READONLY (1 << 2)
1371 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1372 #define BTRFS_INODE_PREALLOC (1 << 4)
1373 #define BTRFS_INODE_SYNC (1 << 5)
1374 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1375 #define BTRFS_INODE_APPEND (1 << 7)
1376 #define BTRFS_INODE_NODUMP (1 << 8)
1377 #define BTRFS_INODE_NOATIME (1 << 9)
1378 #define BTRFS_INODE_DIRSYNC (1 << 10)
1379 #define BTRFS_INODE_COMPRESS (1 << 11)
1381 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1383 /* some macros to generate set/get funcs for the struct fields. This
1384 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1387 #define le8_to_cpu(v) (v)
1388 #define cpu_to_le8(v) (v)
1391 #define read_eb_member(eb, ptr, type, member, result) ( \
1392 read_extent_buffer(eb, (char *)(result), \
1393 ((unsigned long)(ptr)) + \
1394 offsetof(type, member), \
1395 sizeof(((type *)0)->member)))
1397 #define write_eb_member(eb, ptr, type, member, result) ( \
1398 write_extent_buffer(eb, (char *)(result), \
1399 ((unsigned long)(ptr)) + \
1400 offsetof(type, member), \
1401 sizeof(((type *)0)->member)))
1403 #ifndef BTRFS_SETGET_FUNCS
1404 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1405 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1406 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1409 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1410 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1412 type *p = page_address(eb->first_page); \
1413 u##bits res = le##bits##_to_cpu(p->member); \
1416 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1419 type *p = page_address(eb->first_page); \
1420 p->member = cpu_to_le##bits(val); \
1423 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1424 static inline u##bits btrfs_##name(type *s) \
1426 return le##bits##_to_cpu(s->member); \
1428 static inline void btrfs_set_##name(type *s, u##bits val) \
1430 s->member = cpu_to_le##bits(val); \
1433 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1434 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1435 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1436 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1437 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1438 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1440 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1441 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1442 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1443 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1444 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1445 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1447 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1448 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1450 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1452 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1454 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1456 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1458 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1459 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1461 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1463 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1465 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1468 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1470 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1473 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1475 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1478 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1479 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1480 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1481 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1482 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1483 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1484 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1485 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1486 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1487 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1488 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1490 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1492 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1495 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1496 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1497 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1499 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1501 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1503 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1505 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1506 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1508 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1510 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1511 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1513 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1516 unsigned long offset
= (unsigned long)c
;
1517 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1518 offset
+= nr
* sizeof(struct btrfs_stripe
);
1519 return (struct btrfs_stripe
*)offset
;
1522 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1524 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1527 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1528 struct btrfs_chunk
*c
, int nr
)
1530 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1533 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1534 struct btrfs_chunk
*c
, int nr
)
1536 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1539 /* struct btrfs_block_group_item */
1540 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1542 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1544 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1545 struct btrfs_block_group_item
, chunk_objectid
, 64);
1547 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1548 struct btrfs_block_group_item
, chunk_objectid
, 64);
1549 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1550 struct btrfs_block_group_item
, flags
, 64);
1551 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1552 struct btrfs_block_group_item
, flags
, 64);
1554 /* struct btrfs_inode_ref */
1555 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1556 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1558 /* struct btrfs_inode_item */
1559 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1560 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1561 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1562 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1563 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1564 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1565 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1566 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1567 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1568 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1569 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1570 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1572 static inline struct btrfs_timespec
*
1573 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1575 unsigned long ptr
= (unsigned long)inode_item
;
1576 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1577 return (struct btrfs_timespec
*)ptr
;
1580 static inline struct btrfs_timespec
*
1581 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1583 unsigned long ptr
= (unsigned long)inode_item
;
1584 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1585 return (struct btrfs_timespec
*)ptr
;
1588 static inline struct btrfs_timespec
*
1589 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1591 unsigned long ptr
= (unsigned long)inode_item
;
1592 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1593 return (struct btrfs_timespec
*)ptr
;
1596 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1597 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1599 /* struct btrfs_dev_extent */
1600 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1602 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1603 chunk_objectid
, 64);
1604 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1606 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1608 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1610 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1611 return (u8
*)((unsigned long)dev
+ ptr
);
1614 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1615 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1617 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1619 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1622 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1624 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1625 struct btrfs_tree_block_info
*item
,
1626 struct btrfs_disk_key
*key
)
1628 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1631 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1632 struct btrfs_tree_block_info
*item
,
1633 struct btrfs_disk_key
*key
)
1635 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1638 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1640 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1642 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1644 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1647 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1650 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1652 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1655 static inline u32
btrfs_extent_inline_ref_size(int type
)
1657 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1658 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1659 return sizeof(struct btrfs_extent_inline_ref
);
1660 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1661 return sizeof(struct btrfs_shared_data_ref
) +
1662 sizeof(struct btrfs_extent_inline_ref
);
1663 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1664 return sizeof(struct btrfs_extent_data_ref
) +
1665 offsetof(struct btrfs_extent_inline_ref
, offset
);
1670 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1671 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1673 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1674 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1676 /* struct btrfs_node */
1677 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1678 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1680 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1683 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1684 sizeof(struct btrfs_key_ptr
) * nr
;
1685 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1688 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1692 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1693 sizeof(struct btrfs_key_ptr
) * nr
;
1694 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1697 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1700 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1701 sizeof(struct btrfs_key_ptr
) * nr
;
1702 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1705 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1709 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1710 sizeof(struct btrfs_key_ptr
) * nr
;
1711 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1714 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1716 return offsetof(struct btrfs_node
, ptrs
) +
1717 sizeof(struct btrfs_key_ptr
) * nr
;
1720 void btrfs_node_key(struct extent_buffer
*eb
,
1721 struct btrfs_disk_key
*disk_key
, int nr
);
1723 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1724 struct btrfs_disk_key
*disk_key
, int nr
)
1727 ptr
= btrfs_node_key_ptr_offset(nr
);
1728 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1729 struct btrfs_key_ptr
, key
, disk_key
);
1732 /* struct btrfs_item */
1733 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1734 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1736 static inline unsigned long btrfs_item_nr_offset(int nr
)
1738 return offsetof(struct btrfs_leaf
, items
) +
1739 sizeof(struct btrfs_item
) * nr
;
1742 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1745 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1748 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1749 struct btrfs_item
*item
)
1751 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1754 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1756 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1759 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1761 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1764 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1766 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1769 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1770 struct btrfs_disk_key
*disk_key
, int nr
)
1772 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1773 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1776 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1777 struct btrfs_disk_key
*disk_key
, int nr
)
1779 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1780 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1783 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1786 * struct btrfs_root_ref
1788 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1789 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1790 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1792 /* struct btrfs_dir_item */
1793 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1794 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1795 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1796 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1798 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1799 struct btrfs_dir_item
*item
,
1800 struct btrfs_disk_key
*key
)
1802 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1805 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1806 struct btrfs_dir_item
*item
,
1807 struct btrfs_disk_key
*key
)
1809 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1812 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1814 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1816 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1819 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1820 struct btrfs_free_space_header
*h
,
1821 struct btrfs_disk_key
*key
)
1823 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1826 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1827 struct btrfs_free_space_header
*h
,
1828 struct btrfs_disk_key
*key
)
1830 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1833 /* struct btrfs_disk_key */
1834 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1836 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1837 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1839 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1840 struct btrfs_disk_key
*disk
)
1842 cpu
->offset
= le64_to_cpu(disk
->offset
);
1843 cpu
->type
= disk
->type
;
1844 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1847 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1848 struct btrfs_key
*cpu
)
1850 disk
->offset
= cpu_to_le64(cpu
->offset
);
1851 disk
->type
= cpu
->type
;
1852 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1855 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1856 struct btrfs_key
*key
, int nr
)
1858 struct btrfs_disk_key disk_key
;
1859 btrfs_node_key(eb
, &disk_key
, nr
);
1860 btrfs_disk_key_to_cpu(key
, &disk_key
);
1863 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1864 struct btrfs_key
*key
, int nr
)
1866 struct btrfs_disk_key disk_key
;
1867 btrfs_item_key(eb
, &disk_key
, nr
);
1868 btrfs_disk_key_to_cpu(key
, &disk_key
);
1871 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1872 struct btrfs_dir_item
*item
,
1873 struct btrfs_key
*key
)
1875 struct btrfs_disk_key disk_key
;
1876 btrfs_dir_item_key(eb
, item
, &disk_key
);
1877 btrfs_disk_key_to_cpu(key
, &disk_key
);
1881 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1886 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1891 /* struct btrfs_header */
1892 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1893 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1895 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1896 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1897 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1898 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1900 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1902 return (btrfs_header_flags(eb
) & flag
) == flag
;
1905 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1907 u64 flags
= btrfs_header_flags(eb
);
1908 btrfs_set_header_flags(eb
, flags
| flag
);
1909 return (flags
& flag
) == flag
;
1912 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1914 u64 flags
= btrfs_header_flags(eb
);
1915 btrfs_set_header_flags(eb
, flags
& ~flag
);
1916 return (flags
& flag
) == flag
;
1919 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1921 u64 flags
= btrfs_header_flags(eb
);
1922 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1925 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1928 u64 flags
= btrfs_header_flags(eb
);
1929 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1930 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1931 btrfs_set_header_flags(eb
, flags
);
1934 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1936 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1940 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1942 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1946 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1948 return btrfs_header_level(eb
) == 0;
1951 /* struct btrfs_root_item */
1952 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1954 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1955 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1956 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1958 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1960 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1961 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1962 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1963 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1964 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1965 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1966 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1967 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1970 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
1972 return root
->root_item
.flags
& BTRFS_ROOT_SUBVOL_RDONLY
;
1975 /* struct btrfs_super_block */
1977 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1978 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1979 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1981 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1982 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1983 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1984 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1985 struct btrfs_super_block
, chunk_root_generation
, 64);
1986 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1988 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1990 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1991 chunk_root_level
, 8);
1992 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1994 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1995 log_root_transid
, 64);
1996 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1998 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2000 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2002 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2004 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2006 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2008 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2010 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2011 root_dir_objectid
, 64);
2012 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2014 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2016 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2017 compat_ro_flags
, 64);
2018 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2019 incompat_flags
, 64);
2020 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2022 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2023 cache_generation
, 64);
2025 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2027 int t
= btrfs_super_csum_type(s
);
2028 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2029 return btrfs_csum_sizes
[t
];
2032 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2034 return offsetof(struct btrfs_leaf
, items
);
2037 /* struct btrfs_file_extent_item */
2038 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2040 static inline unsigned long
2041 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2043 unsigned long offset
= (unsigned long)e
;
2044 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2048 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2050 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2053 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2055 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2057 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2058 disk_num_bytes
, 64);
2059 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2061 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2063 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2065 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2067 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2069 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2070 other_encoding
, 16);
2072 /* this returns the number of file bytes represented by the inline item.
2073 * If an item is compressed, this is the uncompressed size
2075 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2076 struct btrfs_file_extent_item
*e
)
2078 return btrfs_file_extent_ram_bytes(eb
, e
);
2082 * this returns the number of bytes used by the item on disk, minus the
2083 * size of any extent headers. If a file is compressed on disk, this is
2084 * the compressed size
2086 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2087 struct btrfs_item
*e
)
2089 unsigned long offset
;
2090 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2091 return btrfs_item_size(eb
, e
) - offset
;
2094 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
2096 return sb
->s_fs_info
;
2099 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2102 return root
->leafsize
;
2103 return root
->nodesize
;
2106 /* helper function to cast into the data area of the leaf. */
2107 #define btrfs_item_ptr(leaf, slot, type) \
2108 ((type *)(btrfs_leaf_data(leaf) + \
2109 btrfs_item_offset_nr(leaf, slot)))
2111 #define btrfs_item_ptr_offset(leaf, slot) \
2112 ((unsigned long)(btrfs_leaf_data(leaf) + \
2113 btrfs_item_offset_nr(leaf, slot)))
2115 static inline struct dentry
*fdentry(struct file
*file
)
2117 return file
->f_path
.dentry
;
2120 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2122 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2123 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2126 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2128 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
2132 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2135 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2140 * Doing a truncate won't result in new nodes or leaves, just what we need for
2143 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2146 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2150 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2151 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2152 struct btrfs_root
*root
, unsigned long count
);
2153 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2154 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2155 struct btrfs_root
*root
, u64 bytenr
,
2156 u64 num_bytes
, u64
*refs
, u64
*flags
);
2157 int btrfs_pin_extent(struct btrfs_root
*root
,
2158 u64 bytenr
, u64 num
, int reserved
);
2159 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2160 struct btrfs_root
*root
,
2161 u64 objectid
, u64 offset
, u64 bytenr
);
2162 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2163 struct btrfs_fs_info
*info
,
2165 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2166 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2167 u64 search_start
, u64 search_hint
, int owner
);
2168 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2169 struct btrfs_root
*root
, u32 blocksize
,
2170 u64 parent
, u64 root_objectid
,
2171 struct btrfs_disk_key
*key
, int level
,
2172 u64 hint
, u64 empty_size
);
2173 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2174 struct btrfs_root
*root
,
2175 struct extent_buffer
*buf
,
2176 u64 parent
, int last_ref
);
2177 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2178 struct btrfs_root
*root
,
2179 u64 bytenr
, u32 blocksize
,
2181 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2182 struct btrfs_root
*root
,
2183 u64 root_objectid
, u64 owner
,
2184 u64 offset
, struct btrfs_key
*ins
);
2185 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2186 struct btrfs_root
*root
,
2187 u64 root_objectid
, u64 owner
, u64 offset
,
2188 struct btrfs_key
*ins
);
2189 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2190 struct btrfs_root
*root
,
2191 u64 num_bytes
, u64 min_alloc_size
,
2192 u64 empty_size
, u64 hint_byte
,
2193 u64 search_end
, struct btrfs_key
*ins
,
2195 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2196 struct extent_buffer
*buf
, int full_backref
);
2197 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2198 struct extent_buffer
*buf
, int full_backref
);
2199 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2200 struct btrfs_root
*root
,
2201 u64 bytenr
, u64 num_bytes
, u64 flags
,
2203 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2204 struct btrfs_root
*root
,
2205 u64 bytenr
, u64 num_bytes
, u64 parent
,
2206 u64 root_objectid
, u64 owner
, u64 offset
);
2208 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2209 int btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2210 struct btrfs_root
*root
);
2211 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2212 struct btrfs_root
*root
);
2213 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2214 struct btrfs_root
*root
,
2215 u64 bytenr
, u64 num_bytes
, u64 parent
,
2216 u64 root_objectid
, u64 owner
, u64 offset
);
2218 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2219 struct btrfs_root
*root
);
2220 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2221 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2222 int btrfs_read_block_groups(struct btrfs_root
*root
);
2223 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2224 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2225 struct btrfs_root
*root
, u64 bytes_used
,
2226 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2228 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2229 struct btrfs_root
*root
, u64 group_start
);
2230 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2231 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2232 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2233 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2234 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
2235 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
2236 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2237 struct btrfs_root
*root
);
2238 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2239 struct inode
*inode
);
2240 void btrfs_orphan_release_metadata(struct inode
*inode
);
2241 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
2242 struct btrfs_pending_snapshot
*pending
);
2243 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2244 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2245 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
2246 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
2247 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2248 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2249 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2250 struct btrfs_block_rsv
*rsv
);
2251 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2252 struct btrfs_block_rsv
*block_rsv
,
2254 int btrfs_block_rsv_check(struct btrfs_root
*root
,
2255 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2256 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2257 struct btrfs_block_rsv
*block_rsv
,
2259 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2260 struct btrfs_block_rsv
*dst_rsv
,
2262 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2263 struct btrfs_block_rsv
*block_rsv
,
2265 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2266 struct btrfs_block_group_cache
*cache
);
2267 int btrfs_set_block_group_rw(struct btrfs_root
*root
,
2268 struct btrfs_block_group_cache
*cache
);
2269 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2270 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2271 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2272 u64 start
, u64 end
);
2273 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2274 u64 num_bytes
, u64
*actual_bytes
);
2275 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2276 struct btrfs_root
*root
, u64 type
);
2277 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
2279 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2281 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2282 int level
, int *slot
);
2283 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2284 int btrfs_previous_item(struct btrfs_root
*root
,
2285 struct btrfs_path
*path
, u64 min_objectid
,
2287 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2288 struct btrfs_root
*root
, struct btrfs_path
*path
,
2289 struct btrfs_key
*new_key
);
2290 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2291 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2292 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2293 struct btrfs_key
*key
, int lowest_level
,
2294 int cache_only
, u64 min_trans
);
2295 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2296 struct btrfs_key
*max_key
,
2297 struct btrfs_path
*path
, int cache_only
,
2299 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2300 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2301 struct extent_buffer
*parent
, int parent_slot
,
2302 struct extent_buffer
**cow_ret
);
2303 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2304 struct btrfs_root
*root
,
2305 struct extent_buffer
*buf
,
2306 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2307 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2308 struct extent_buffer
*buf
);
2309 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2310 *root
, struct btrfs_path
*path
, u32 data_size
);
2311 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2312 struct btrfs_root
*root
,
2313 struct btrfs_path
*path
,
2314 u32 new_size
, int from_end
);
2315 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2316 struct btrfs_root
*root
,
2317 struct btrfs_path
*path
,
2318 struct btrfs_key
*new_key
,
2319 unsigned long split_offset
);
2320 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2321 struct btrfs_root
*root
,
2322 struct btrfs_path
*path
,
2323 struct btrfs_key
*new_key
);
2324 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2325 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2327 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2328 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2329 int start_slot
, int cache_only
, u64
*last_ret
,
2330 struct btrfs_key
*progress
);
2331 void btrfs_release_path(struct btrfs_path
*p
);
2332 struct btrfs_path
*btrfs_alloc_path(void);
2333 void btrfs_free_path(struct btrfs_path
*p
);
2334 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2335 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2336 struct extent_buffer
*held
, int held_rw
);
2337 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2339 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2340 struct btrfs_path
*path
, int slot
, int nr
);
2341 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2342 struct btrfs_root
*root
,
2343 struct btrfs_path
*path
)
2345 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2348 int setup_items_for_insert(struct btrfs_trans_handle
*trans
,
2349 struct btrfs_root
*root
, struct btrfs_path
*path
,
2350 struct btrfs_key
*cpu_key
, u32
*data_size
,
2351 u32 total_data
, u32 total_size
, int nr
);
2352 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2353 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2354 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2355 struct btrfs_root
*root
,
2356 struct btrfs_path
*path
,
2357 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2359 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2360 struct btrfs_root
*root
,
2361 struct btrfs_path
*path
,
2362 struct btrfs_key
*key
,
2365 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2368 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2369 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2370 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2371 void btrfs_drop_snapshot(struct btrfs_root
*root
,
2372 struct btrfs_block_rsv
*block_rsv
, int update_ref
);
2373 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2374 struct btrfs_root
*root
,
2375 struct extent_buffer
*node
,
2376 struct extent_buffer
*parent
);
2377 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2380 * Get synced with close_ctree()
2383 return fs_info
->closing
;
2387 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2388 struct btrfs_path
*path
,
2389 u64 root_id
, u64 ref_id
);
2390 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2391 struct btrfs_root
*tree_root
,
2392 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2393 const char *name
, int name_len
);
2394 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2395 struct btrfs_root
*tree_root
,
2396 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2397 const char *name
, int name_len
);
2398 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2399 struct btrfs_key
*key
);
2400 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2401 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2403 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2404 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2406 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2407 btrfs_root_item
*item
, struct btrfs_key
*key
);
2408 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2409 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2410 void btrfs_set_root_node(struct btrfs_root_item
*item
,
2411 struct extent_buffer
*node
);
2412 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2415 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2416 struct btrfs_root
*root
, const char *name
,
2417 int name_len
, struct inode
*dir
,
2418 struct btrfs_key
*location
, u8 type
, u64 index
);
2419 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2420 struct btrfs_root
*root
,
2421 struct btrfs_path
*path
, u64 dir
,
2422 const char *name
, int name_len
,
2424 struct btrfs_dir_item
*
2425 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2426 struct btrfs_root
*root
,
2427 struct btrfs_path
*path
, u64 dir
,
2428 u64 objectid
, const char *name
, int name_len
,
2430 struct btrfs_dir_item
*
2431 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2432 struct btrfs_path
*path
, u64 dirid
,
2433 const char *name
, int name_len
);
2434 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2435 struct btrfs_path
*path
,
2436 const char *name
, int name_len
);
2437 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2438 struct btrfs_root
*root
,
2439 struct btrfs_path
*path
,
2440 struct btrfs_dir_item
*di
);
2441 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2442 struct btrfs_root
*root
,
2443 struct btrfs_path
*path
, u64 objectid
,
2444 const char *name
, u16 name_len
,
2445 const void *data
, u16 data_len
);
2446 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2447 struct btrfs_root
*root
,
2448 struct btrfs_path
*path
, u64 dir
,
2449 const char *name
, u16 name_len
,
2451 int verify_dir_item(struct btrfs_root
*root
,
2452 struct extent_buffer
*leaf
,
2453 struct btrfs_dir_item
*dir_item
);
2456 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2457 struct btrfs_root
*root
, u64 offset
);
2458 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2459 struct btrfs_root
*root
, u64 offset
);
2460 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2463 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2464 struct btrfs_root
*root
,
2465 const char *name
, int name_len
,
2466 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2467 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2468 struct btrfs_root
*root
,
2469 const char *name
, int name_len
,
2470 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2471 struct btrfs_inode_ref
*
2472 btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2473 struct btrfs_root
*root
,
2474 struct btrfs_path
*path
,
2475 const char *name
, int name_len
,
2476 u64 inode_objectid
, u64 ref_objectid
, int mod
);
2477 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2478 struct btrfs_root
*root
,
2479 struct btrfs_path
*path
, u64 objectid
);
2480 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2481 *root
, struct btrfs_path
*path
,
2482 struct btrfs_key
*location
, int mod
);
2485 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2486 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2487 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2488 struct bio
*bio
, u32
*dst
);
2489 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
2490 struct bio
*bio
, u64 logical_offset
, u32
*dst
);
2491 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2492 struct btrfs_root
*root
,
2493 u64 objectid
, u64 pos
,
2494 u64 disk_offset
, u64 disk_num_bytes
,
2495 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2496 u8 compression
, u8 encryption
, u16 other_encoding
);
2497 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2498 struct btrfs_root
*root
,
2499 struct btrfs_path
*path
, u64 objectid
,
2500 u64 bytenr
, int mod
);
2501 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2502 struct btrfs_root
*root
,
2503 struct btrfs_ordered_sum
*sums
);
2504 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2505 struct bio
*bio
, u64 file_start
, int contig
);
2506 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2507 struct btrfs_root
*root
,
2508 struct btrfs_path
*path
,
2509 u64 bytenr
, int cow
);
2510 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2511 struct btrfs_root
*root
, struct btrfs_path
*path
,
2513 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
2514 struct list_head
*list
, int search_commit
);
2516 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
2517 size_t pg_offset
, u64 start
, u64 len
,
2520 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2521 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2522 #define ClearPageChecked ClearPageFsMisc
2523 #define SetPageChecked SetPageFsMisc
2524 #define PageChecked PageFsMisc
2527 /* This forces readahead on a given range of bytes in an inode */
2528 static inline void btrfs_force_ra(struct address_space
*mapping
,
2529 struct file_ra_state
*ra
, struct file
*file
,
2530 pgoff_t offset
, unsigned long req_size
)
2532 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
2535 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2536 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2537 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2538 struct btrfs_root
*root
,
2539 struct inode
*dir
, struct inode
*inode
,
2540 const char *name
, int name_len
);
2541 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2542 struct inode
*parent_inode
, struct inode
*inode
,
2543 const char *name
, int name_len
, int add_backref
, u64 index
);
2544 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2545 struct btrfs_root
*root
,
2546 struct inode
*dir
, u64 objectid
,
2547 const char *name
, int name_len
);
2548 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2549 struct btrfs_root
*root
,
2550 struct inode
*inode
, u64 new_size
,
2553 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2554 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
2555 struct extent_state
**cached_state
);
2556 int btrfs_writepages(struct address_space
*mapping
,
2557 struct writeback_control
*wbc
);
2558 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2559 struct btrfs_root
*new_root
, u64 new_dirid
);
2560 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2561 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2563 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2564 int btrfs_readpage(struct file
*file
, struct page
*page
);
2565 void btrfs_evict_inode(struct inode
*inode
);
2566 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
2567 void btrfs_dirty_inode(struct inode
*inode
, int flags
);
2568 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2569 void btrfs_destroy_inode(struct inode
*inode
);
2570 int btrfs_drop_inode(struct inode
*inode
);
2571 int btrfs_init_cachep(void);
2572 void btrfs_destroy_cachep(void);
2573 long btrfs_ioctl_trans_end(struct file
*file
);
2574 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2575 struct btrfs_root
*root
, int *was_new
);
2576 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2577 size_t pg_offset
, u64 start
, u64 end
,
2579 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2580 struct btrfs_root
*root
,
2581 struct inode
*inode
);
2582 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2583 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2584 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
2585 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
2586 struct btrfs_root
*root
);
2587 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
2588 int btrfs_invalidate_inodes(struct btrfs_root
*root
);
2589 void btrfs_add_delayed_iput(struct inode
*inode
);
2590 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
2591 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
2592 u64 start
, u64 num_bytes
, u64 min_size
,
2593 loff_t actual_len
, u64
*alloc_hint
);
2594 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
2595 struct btrfs_trans_handle
*trans
, int mode
,
2596 u64 start
, u64 num_bytes
, u64 min_size
,
2597 loff_t actual_len
, u64
*alloc_hint
);
2598 extern const struct dentry_operations btrfs_dentry_operations
;
2601 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2602 void btrfs_update_iflags(struct inode
*inode
);
2603 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2604 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
2605 struct btrfs_ioctl_defrag_range_args
*range
,
2606 u64 newer_than
, unsigned long max_pages
);
2608 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
2609 struct inode
*inode
);
2610 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
2611 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
2612 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2614 extern const struct file_operations btrfs_file_operations
;
2615 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
2616 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
2617 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2618 struct inode
*inode
, u64 start
, u64 end
);
2619 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2620 void btrfs_drop_pages(struct page
**pages
, size_t num_pages
);
2621 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
2622 struct page
**pages
, size_t num_pages
,
2623 loff_t pos
, size_t write_bytes
,
2624 struct extent_state
**cached
);
2627 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2628 struct btrfs_root
*root
, int cache_only
);
2631 int btrfs_init_sysfs(void);
2632 void btrfs_exit_sysfs(void);
2635 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2638 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2639 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2640 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
2641 unsigned int line
, int errno
);
2643 #define btrfs_std_error(fs_info, errno) \
2646 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2650 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2651 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
2652 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2653 struct inode
*inode
, struct inode
*dir
);
2654 int btrfs_acl_chmod(struct inode
*inode
);
2656 #define btrfs_get_acl NULL
2657 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2658 struct inode
*inode
, struct inode
*dir
)
2662 static inline int btrfs_acl_chmod(struct inode
*inode
)
2669 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
2670 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
2671 struct btrfs_root
*root
);
2672 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
2673 struct btrfs_root
*root
);
2674 int btrfs_recover_relocation(struct btrfs_root
*root
);
2675 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
2676 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
2677 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2678 struct extent_buffer
*cow
);
2679 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
2680 struct btrfs_pending_snapshot
*pending
,
2681 u64
*bytes_to_reserve
);
2682 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
2683 struct btrfs_pending_snapshot
*pending
);
2686 int btrfs_scrub_dev(struct btrfs_root
*root
, u64 devid
, u64 start
, u64 end
,
2687 struct btrfs_scrub_progress
*progress
, int readonly
);
2688 int btrfs_scrub_pause(struct btrfs_root
*root
);
2689 int btrfs_scrub_pause_super(struct btrfs_root
*root
);
2690 int btrfs_scrub_continue(struct btrfs_root
*root
);
2691 int btrfs_scrub_continue_super(struct btrfs_root
*root
);
2692 int btrfs_scrub_cancel(struct btrfs_root
*root
);
2693 int btrfs_scrub_cancel_dev(struct btrfs_root
*root
, struct btrfs_device
*dev
);
2694 int btrfs_scrub_cancel_devid(struct btrfs_root
*root
, u64 devid
);
2695 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
2696 struct btrfs_scrub_progress
*progress
);