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 * just in case we somehow lose the roots and are not able to mount,
365 * we store an array of the roots from previous transactions
368 #define BTRFS_NUM_BACKUP_ROOTS 4
369 struct btrfs_root_backup
{
371 __le64 tree_root_gen
;
374 __le64 chunk_root_gen
;
377 __le64 extent_root_gen
;
386 __le64 csum_root_gen
;
396 u8 extent_root_level
;
400 /* future and to align */
402 } __attribute__ ((__packed__
));
405 * the super block basically lists the main trees of the FS
406 * it currently lacks any block count etc etc
408 struct btrfs_super_block
{
409 u8 csum
[BTRFS_CSUM_SIZE
];
410 /* the first 4 fields must match struct btrfs_header */
411 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
412 __le64 bytenr
; /* this block number */
415 /* allowed to be different from the btrfs_header from here own down */
422 /* this will help find the new super based on the log root */
423 __le64 log_root_transid
;
426 __le64 root_dir_objectid
;
432 __le32 sys_chunk_array_size
;
433 __le64 chunk_root_generation
;
435 __le64 compat_ro_flags
;
436 __le64 incompat_flags
;
441 struct btrfs_dev_item dev_item
;
443 char label
[BTRFS_LABEL_SIZE
];
445 __le64 cache_generation
;
447 /* future expansion */
449 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
450 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
451 } __attribute__ ((__packed__
));
454 * Compat flags that we support. If any incompat flags are set other than the
455 * ones specified below then we will fail to mount
457 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
458 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
459 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
460 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
462 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
463 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
464 #define BTRFS_FEATURE_INCOMPAT_SUPP \
465 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
466 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
467 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
468 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
471 * A leaf is full of items. offset and size tell us where to find
472 * the item in the leaf (relative to the start of the data area)
475 struct btrfs_disk_key key
;
478 } __attribute__ ((__packed__
));
481 * leaves have an item area and a data area:
482 * [item0, item1....itemN] [free space] [dataN...data1, data0]
484 * The data is separate from the items to get the keys closer together
488 struct btrfs_header header
;
489 struct btrfs_item items
[];
490 } __attribute__ ((__packed__
));
493 * all non-leaf blocks are nodes, they hold only keys and pointers to
496 struct btrfs_key_ptr
{
497 struct btrfs_disk_key key
;
500 } __attribute__ ((__packed__
));
503 struct btrfs_header header
;
504 struct btrfs_key_ptr ptrs
[];
505 } __attribute__ ((__packed__
));
508 * btrfs_paths remember the path taken from the root down to the leaf.
509 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
510 * to any other levels that are present.
512 * The slots array records the index of the item or block pointer
513 * used while walking the tree.
516 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
517 int slots
[BTRFS_MAX_LEVEL
];
518 /* if there is real range locking, this locks field will change */
519 int locks
[BTRFS_MAX_LEVEL
];
521 /* keep some upper locks as we walk down */
525 * set by btrfs_split_item, tells search_slot to keep all locks
526 * and to force calls to keep space in the nodes
528 unsigned int search_for_split
:1;
529 unsigned int keep_locks
:1;
530 unsigned int skip_locking
:1;
531 unsigned int leave_spinning
:1;
532 unsigned int search_commit_root
:1;
536 * items in the extent btree are used to record the objectid of the
537 * owner of the block and the number of references
540 struct btrfs_extent_item
{
544 } __attribute__ ((__packed__
));
546 struct btrfs_extent_item_v0
{
548 } __attribute__ ((__packed__
));
550 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
551 sizeof(struct btrfs_item))
553 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
554 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
556 /* following flags only apply to tree blocks */
558 /* use full backrefs for extent pointers in the block */
559 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
562 * this flag is only used internally by scrub and may be changed at any time
563 * it is only declared here to avoid collisions
565 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
567 struct btrfs_tree_block_info
{
568 struct btrfs_disk_key key
;
570 } __attribute__ ((__packed__
));
572 struct btrfs_extent_data_ref
{
577 } __attribute__ ((__packed__
));
579 struct btrfs_shared_data_ref
{
581 } __attribute__ ((__packed__
));
583 struct btrfs_extent_inline_ref
{
586 } __attribute__ ((__packed__
));
588 /* old style backrefs item */
589 struct btrfs_extent_ref_v0
{
594 } __attribute__ ((__packed__
));
597 /* dev extents record free space on individual devices. The owner
598 * field points back to the chunk allocation mapping tree that allocated
599 * the extent. The chunk tree uuid field is a way to double check the owner
601 struct btrfs_dev_extent
{
603 __le64 chunk_objectid
;
606 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
607 } __attribute__ ((__packed__
));
609 struct btrfs_inode_ref
{
613 } __attribute__ ((__packed__
));
615 struct btrfs_timespec
{
618 } __attribute__ ((__packed__
));
620 enum btrfs_compression_type
{
621 BTRFS_COMPRESS_NONE
= 0,
622 BTRFS_COMPRESS_ZLIB
= 1,
623 BTRFS_COMPRESS_LZO
= 2,
624 BTRFS_COMPRESS_TYPES
= 2,
625 BTRFS_COMPRESS_LAST
= 3,
628 struct btrfs_inode_item
{
629 /* nfs style generation number */
631 /* transid that last touched this inode */
643 /* modification sequence number for NFS */
647 * a little future expansion, for more than this we can
648 * just grow the inode item and version it
651 struct btrfs_timespec atime
;
652 struct btrfs_timespec ctime
;
653 struct btrfs_timespec mtime
;
654 struct btrfs_timespec otime
;
655 } __attribute__ ((__packed__
));
657 struct btrfs_dir_log_item
{
659 } __attribute__ ((__packed__
));
661 struct btrfs_dir_item
{
662 struct btrfs_disk_key location
;
667 } __attribute__ ((__packed__
));
669 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
671 struct btrfs_root_item
{
672 struct btrfs_inode_item inode
;
678 __le64 last_snapshot
;
681 struct btrfs_disk_key drop_progress
;
684 } __attribute__ ((__packed__
));
687 * this is used for both forward and backward root refs
689 struct btrfs_root_ref
{
693 } __attribute__ ((__packed__
));
695 #define BTRFS_FILE_EXTENT_INLINE 0
696 #define BTRFS_FILE_EXTENT_REG 1
697 #define BTRFS_FILE_EXTENT_PREALLOC 2
699 struct btrfs_file_extent_item
{
701 * transaction id that created this extent
705 * max number of bytes to hold this extent in ram
706 * when we split a compressed extent we can't know how big
707 * each of the resulting pieces will be. So, this is
708 * an upper limit on the size of the extent in ram instead of
714 * 32 bits for the various ways we might encode the data,
715 * including compression and encryption. If any of these
716 * are set to something a given disk format doesn't understand
717 * it is treated like an incompat flag for reading and writing,
722 __le16 other_encoding
; /* spare for later use */
724 /* are we inline data or a real extent? */
728 * disk space consumed by the extent, checksum blocks are included
732 __le64 disk_num_bytes
;
734 * the logical offset in file blocks (no csums)
735 * this extent record is for. This allows a file extent to point
736 * into the middle of an existing extent on disk, sharing it
737 * between two snapshots (useful if some bytes in the middle of the
738 * extent have changed
742 * the logical number of file blocks (no csums included). This
743 * always reflects the size uncompressed and without encoding.
747 } __attribute__ ((__packed__
));
749 struct btrfs_csum_item
{
751 } __attribute__ ((__packed__
));
753 /* different types of block groups (and chunks) */
754 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
755 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
756 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
757 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
758 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
759 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
760 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
761 #define BTRFS_NR_RAID_TYPES 5
763 struct btrfs_block_group_item
{
765 __le64 chunk_objectid
;
767 } __attribute__ ((__packed__
));
769 struct btrfs_space_info
{
772 u64 total_bytes
; /* total bytes in the space,
773 this doesn't take mirrors into account */
774 u64 bytes_used
; /* total bytes used,
775 this doesn't take mirrors into account */
776 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
777 transaction finishes */
778 u64 bytes_reserved
; /* total bytes the allocator has reserved for
779 current allocations */
780 u64 bytes_readonly
; /* total bytes that are read only */
782 u64 bytes_may_use
; /* number of bytes that may be used for
783 delalloc/allocations */
784 u64 disk_used
; /* total bytes used on disk */
785 u64 disk_total
; /* total bytes on disk, takes mirrors into
789 * we bump reservation progress every time we decrement
790 * bytes_reserved. This way people waiting for reservations
791 * know something good has happened and they can check
792 * for progress. The number here isn't to be trusted, it
793 * just shows reclaim activity
795 unsigned long reservation_progress
;
797 unsigned int full
:1; /* indicates that we cannot allocate any more
798 chunks for this space */
799 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
801 unsigned int flush
:1; /* set if we are trying to make space */
803 unsigned int force_alloc
; /* set if we need to force a chunk
804 alloc for this space */
806 struct list_head list
;
808 /* for block groups in our same type */
809 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
811 struct rw_semaphore groups_sem
;
812 wait_queue_head_t wait
;
815 struct btrfs_block_rsv
{
818 struct btrfs_space_info
*space_info
;
824 * free clusters are used to claim free space in relatively large chunks,
825 * allowing us to do less seeky writes. They are used for all metadata
826 * allocations and data allocations in ssd mode.
828 struct btrfs_free_cluster
{
830 spinlock_t refill_lock
;
833 /* largest extent in this cluster */
836 /* first extent starting offset */
839 struct btrfs_block_group_cache
*block_group
;
841 * when a cluster is allocated from a block group, we put the
842 * cluster onto a list in the block group so that it can
843 * be freed before the block group is freed.
845 struct list_head block_group_list
;
848 enum btrfs_caching_type
{
850 BTRFS_CACHE_STARTED
= 1,
851 BTRFS_CACHE_FINISHED
= 2,
854 enum btrfs_disk_cache_state
{
855 BTRFS_DC_WRITTEN
= 0,
859 BTRFS_DC_NEED_WRITE
= 4,
862 struct btrfs_caching_control
{
863 struct list_head list
;
865 wait_queue_head_t wait
;
866 struct btrfs_work work
;
867 struct btrfs_block_group_cache
*block_group
;
872 struct btrfs_block_group_cache
{
873 struct btrfs_key key
;
874 struct btrfs_block_group_item item
;
875 struct btrfs_fs_info
*fs_info
;
883 u64 cache_generation
;
885 unsigned int dirty
:1;
888 int disk_cache_state
;
890 /* cache tracking stuff */
892 struct btrfs_caching_control
*caching_ctl
;
893 u64 last_byte_to_unpin
;
895 struct btrfs_space_info
*space_info
;
897 /* free space cache stuff */
898 struct btrfs_free_space_ctl
*free_space_ctl
;
900 /* block group cache stuff */
901 struct rb_node cache_node
;
903 /* for block groups in the same raid type */
904 struct list_head list
;
909 /* List of struct btrfs_free_clusters for this block group.
910 * Today it will only have one thing on it, but that may change
912 struct list_head cluster_list
;
915 struct reloc_control
;
917 struct btrfs_fs_devices
;
918 struct btrfs_delayed_root
;
919 struct btrfs_fs_info
{
920 u8 fsid
[BTRFS_FSID_SIZE
];
921 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
922 struct btrfs_root
*extent_root
;
923 struct btrfs_root
*tree_root
;
924 struct btrfs_root
*chunk_root
;
925 struct btrfs_root
*dev_root
;
926 struct btrfs_root
*fs_root
;
927 struct btrfs_root
*csum_root
;
929 /* the log root tree is a directory of all the other log roots */
930 struct btrfs_root
*log_root_tree
;
932 spinlock_t fs_roots_radix_lock
;
933 struct radix_tree_root fs_roots_radix
;
935 /* block group cache stuff */
936 spinlock_t block_group_cache_lock
;
937 struct rb_root block_group_cache_tree
;
939 /* keep track of unallocated space */
940 spinlock_t free_chunk_lock
;
941 u64 free_chunk_space
;
943 struct extent_io_tree freed_extents
[2];
944 struct extent_io_tree
*pinned_extents
;
946 /* logical->physical extent mapping */
947 struct btrfs_mapping_tree mapping_tree
;
950 * block reservation for extent, checksum, root tree and
951 * delayed dir index item
953 struct btrfs_block_rsv global_block_rsv
;
954 /* block reservation for delay allocation */
955 struct btrfs_block_rsv delalloc_block_rsv
;
956 /* block reservation for metadata operations */
957 struct btrfs_block_rsv trans_block_rsv
;
958 /* block reservation for chunk tree */
959 struct btrfs_block_rsv chunk_block_rsv
;
961 struct btrfs_block_rsv empty_block_rsv
;
964 u64 last_trans_committed
;
967 * this is updated to the current trans every time a full commit
968 * is required instead of the faster short fsync log commits
970 u64 last_trans_log_full_commit
;
971 unsigned long mount_opt
:20;
972 unsigned long compress_type
:4;
975 struct btrfs_transaction
*running_transaction
;
976 wait_queue_head_t transaction_throttle
;
977 wait_queue_head_t transaction_wait
;
978 wait_queue_head_t transaction_blocked_wait
;
979 wait_queue_head_t async_submit_wait
;
981 struct btrfs_super_block
*super_copy
;
982 struct btrfs_super_block
*super_for_commit
;
983 struct block_device
*__bdev
;
984 struct super_block
*sb
;
985 struct inode
*btree_inode
;
986 struct backing_dev_info bdi
;
987 struct mutex tree_log_mutex
;
988 struct mutex transaction_kthread_mutex
;
989 struct mutex cleaner_mutex
;
990 struct mutex chunk_mutex
;
991 struct mutex volume_mutex
;
993 * this protects the ordered operations list only while we are
994 * processing all of the entries on it. This way we make
995 * sure the commit code doesn't find the list temporarily empty
996 * because another function happens to be doing non-waiting preflush
997 * before jumping into the main commit.
999 struct mutex ordered_operations_mutex
;
1000 struct rw_semaphore extent_commit_sem
;
1002 struct rw_semaphore cleanup_work_sem
;
1004 struct rw_semaphore subvol_sem
;
1005 struct srcu_struct subvol_srcu
;
1007 spinlock_t trans_lock
;
1009 * the reloc mutex goes with the trans lock, it is taken
1010 * during commit to protect us from the relocation code
1012 struct mutex reloc_mutex
;
1014 struct list_head trans_list
;
1015 struct list_head hashers
;
1016 struct list_head dead_roots
;
1017 struct list_head caching_block_groups
;
1019 spinlock_t delayed_iput_lock
;
1020 struct list_head delayed_iputs
;
1022 atomic_t nr_async_submits
;
1023 atomic_t async_submit_draining
;
1024 atomic_t nr_async_bios
;
1025 atomic_t async_delalloc_pages
;
1026 atomic_t open_ioctl_trans
;
1029 * this is used by the balancing code to wait for all the pending
1032 spinlock_t ordered_extent_lock
;
1035 * all of the data=ordered extents pending writeback
1036 * these can span multiple transactions and basically include
1037 * every dirty data page that isn't from nodatacow
1039 struct list_head ordered_extents
;
1042 * all of the inodes that have delalloc bytes. It is possible for
1043 * this list to be empty even when there is still dirty data=ordered
1044 * extents waiting to finish IO.
1046 struct list_head delalloc_inodes
;
1049 * special rename and truncate targets that must be on disk before
1050 * we're allowed to commit. This is basically the ext3 style
1051 * data=ordered list.
1053 struct list_head ordered_operations
;
1056 * there is a pool of worker threads for checksumming during writes
1057 * and a pool for checksumming after reads. This is because readers
1058 * can run with FS locks held, and the writers may be waiting for
1059 * those locks. We don't want ordering in the pending list to cause
1060 * deadlocks, and so the two are serviced separately.
1062 * A third pool does submit_bio to avoid deadlocking with the other
1065 struct btrfs_workers generic_worker
;
1066 struct btrfs_workers workers
;
1067 struct btrfs_workers delalloc_workers
;
1068 struct btrfs_workers endio_workers
;
1069 struct btrfs_workers endio_meta_workers
;
1070 struct btrfs_workers endio_meta_write_workers
;
1071 struct btrfs_workers endio_write_workers
;
1072 struct btrfs_workers endio_freespace_worker
;
1073 struct btrfs_workers submit_workers
;
1074 struct btrfs_workers caching_workers
;
1077 * fixup workers take dirty pages that didn't properly go through
1078 * the cow mechanism and make them safe to write. It happens
1079 * for the sys_munmap function call path
1081 struct btrfs_workers fixup_workers
;
1082 struct btrfs_workers delayed_workers
;
1083 struct task_struct
*transaction_kthread
;
1084 struct task_struct
*cleaner_kthread
;
1085 int thread_pool_size
;
1087 struct kobject super_kobj
;
1088 struct completion kobj_unregister
;
1091 int log_root_recovering
;
1097 /* protected by the delalloc lock, used to keep from writing
1098 * metadata until there is a nice batch
1100 u64 dirty_metadata_bytes
;
1101 struct list_head dirty_cowonly_roots
;
1103 struct btrfs_fs_devices
*fs_devices
;
1106 * the space_info list is almost entirely read only. It only changes
1107 * when we add a new raid type to the FS, and that happens
1108 * very rarely. RCU is used to protect it.
1110 struct list_head space_info
;
1112 struct reloc_control
*reloc_ctl
;
1114 spinlock_t delalloc_lock
;
1117 /* data_alloc_cluster is only used in ssd mode */
1118 struct btrfs_free_cluster data_alloc_cluster
;
1120 /* all metadata allocations go through this cluster */
1121 struct btrfs_free_cluster meta_alloc_cluster
;
1123 /* auto defrag inodes go here */
1124 spinlock_t defrag_inodes_lock
;
1125 struct rb_root defrag_inodes
;
1126 atomic_t defrag_running
;
1128 spinlock_t ref_cache_lock
;
1129 u64 total_ref_cache_size
;
1131 u64 avail_data_alloc_bits
;
1132 u64 avail_metadata_alloc_bits
;
1133 u64 avail_system_alloc_bits
;
1134 u64 data_alloc_profile
;
1135 u64 metadata_alloc_profile
;
1136 u64 system_alloc_profile
;
1138 unsigned data_chunk_allocations
;
1139 unsigned metadata_ratio
;
1143 /* private scrub information */
1144 struct mutex scrub_lock
;
1145 atomic_t scrubs_running
;
1146 atomic_t scrub_pause_req
;
1147 atomic_t scrubs_paused
;
1148 atomic_t scrub_cancel_req
;
1149 wait_queue_head_t scrub_pause_wait
;
1150 struct rw_semaphore scrub_super_lock
;
1151 int scrub_workers_refcnt
;
1152 struct btrfs_workers scrub_workers
;
1154 /* filesystem state */
1157 struct btrfs_delayed_root
*delayed_root
;
1159 /* next backup root to be overwritten */
1160 int backup_root_index
;
1164 * in ram representation of the tree. extent_root is used for all allocations
1165 * and for the extent tree extent_root root.
1168 struct extent_buffer
*node
;
1170 struct extent_buffer
*commit_root
;
1171 struct btrfs_root
*log_root
;
1172 struct btrfs_root
*reloc_root
;
1174 struct btrfs_root_item root_item
;
1175 struct btrfs_key root_key
;
1176 struct btrfs_fs_info
*fs_info
;
1177 struct extent_io_tree dirty_log_pages
;
1179 struct kobject root_kobj
;
1180 struct completion kobj_unregister
;
1181 struct mutex objectid_mutex
;
1183 spinlock_t accounting_lock
;
1184 struct btrfs_block_rsv
*block_rsv
;
1186 /* free ino cache stuff */
1187 struct mutex fs_commit_mutex
;
1188 struct btrfs_free_space_ctl
*free_ino_ctl
;
1189 enum btrfs_caching_type cached
;
1190 spinlock_t cache_lock
;
1191 wait_queue_head_t cache_wait
;
1192 struct btrfs_free_space_ctl
*free_ino_pinned
;
1194 struct inode
*cache_inode
;
1196 struct mutex log_mutex
;
1197 wait_queue_head_t log_writer_wait
;
1198 wait_queue_head_t log_commit_wait
[2];
1199 atomic_t log_writers
;
1200 atomic_t log_commit
[2];
1201 unsigned long log_transid
;
1202 unsigned long last_log_commit
;
1203 unsigned long log_batch
;
1204 pid_t log_start_pid
;
1205 bool log_multiple_pids
;
1210 /* data allocations are done in sectorsize units */
1213 /* node allocations are done in nodesize units */
1216 /* leaf allocations are done in leafsize units */
1223 u64 highest_objectid
;
1225 /* btrfs_record_root_in_trans is a multi-step process,
1226 * and it can race with the balancing code. But the
1227 * race is very small, and only the first time the root
1228 * is added to each transaction. So in_trans_setup
1229 * is used to tell us when more checks are required
1231 unsigned long in_trans_setup
;
1236 u64 defrag_trans_start
;
1237 struct btrfs_key defrag_progress
;
1238 struct btrfs_key defrag_max
;
1242 /* the dirty list is only used by non-reference counted roots */
1243 struct list_head dirty_list
;
1245 struct list_head root_list
;
1247 spinlock_t orphan_lock
;
1248 struct list_head orphan_list
;
1249 struct btrfs_block_rsv
*orphan_block_rsv
;
1250 int orphan_item_inserted
;
1251 int orphan_cleanup_state
;
1253 spinlock_t inode_lock
;
1254 /* red-black tree that keeps track of in-memory inodes */
1255 struct rb_root inode_tree
;
1258 * radix tree that keeps track of delayed nodes of every inode,
1259 * protected by inode_lock
1261 struct radix_tree_root delayed_nodes_tree
;
1263 * right now this just gets used so that a root has its own devid
1264 * for stat. It may be used for more later
1269 struct btrfs_ioctl_defrag_range_args
{
1270 /* start of the defrag operation */
1273 /* number of bytes to defrag, use (u64)-1 to say all */
1277 * flags for the operation, which can include turning
1278 * on compression for this one defrag
1283 * any extent bigger than this will be considered
1284 * already defragged. Use 0 to take the kernel default
1285 * Use 1 to say every single extent must be rewritten
1287 __u32 extent_thresh
;
1290 * which compression method to use if turning on compression
1291 * for this defrag operation. If unspecified, zlib will
1294 __u32 compress_type
;
1296 /* spare for later */
1302 * inode items have the data typically returned from stat and store other
1303 * info about object characteristics. There is one for every file and dir in
1306 #define BTRFS_INODE_ITEM_KEY 1
1307 #define BTRFS_INODE_REF_KEY 12
1308 #define BTRFS_XATTR_ITEM_KEY 24
1309 #define BTRFS_ORPHAN_ITEM_KEY 48
1310 /* reserve 2-15 close to the inode for later flexibility */
1313 * dir items are the name -> inode pointers in a directory. There is one
1314 * for every name in a directory.
1316 #define BTRFS_DIR_LOG_ITEM_KEY 60
1317 #define BTRFS_DIR_LOG_INDEX_KEY 72
1318 #define BTRFS_DIR_ITEM_KEY 84
1319 #define BTRFS_DIR_INDEX_KEY 96
1321 * extent data is for file data
1323 #define BTRFS_EXTENT_DATA_KEY 108
1326 * extent csums are stored in a separate tree and hold csums for
1327 * an entire extent on disk.
1329 #define BTRFS_EXTENT_CSUM_KEY 128
1332 * root items point to tree roots. They are typically in the root
1333 * tree used by the super block to find all the other trees
1335 #define BTRFS_ROOT_ITEM_KEY 132
1338 * root backrefs tie subvols and snapshots to the directory entries that
1341 #define BTRFS_ROOT_BACKREF_KEY 144
1344 * root refs make a fast index for listing all of the snapshots and
1345 * subvolumes referenced by a given root. They point directly to the
1346 * directory item in the root that references the subvol
1348 #define BTRFS_ROOT_REF_KEY 156
1351 * extent items are in the extent map tree. These record which blocks
1352 * are used, and how many references there are to each block
1354 #define BTRFS_EXTENT_ITEM_KEY 168
1356 #define BTRFS_TREE_BLOCK_REF_KEY 176
1358 #define BTRFS_EXTENT_DATA_REF_KEY 178
1360 #define BTRFS_EXTENT_REF_V0_KEY 180
1362 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1364 #define BTRFS_SHARED_DATA_REF_KEY 184
1367 * block groups give us hints into the extent allocation trees. Which
1368 * blocks are free etc etc
1370 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1372 #define BTRFS_DEV_EXTENT_KEY 204
1373 #define BTRFS_DEV_ITEM_KEY 216
1374 #define BTRFS_CHUNK_ITEM_KEY 228
1377 * string items are for debugging. They just store a short string of
1380 #define BTRFS_STRING_ITEM_KEY 253
1383 * Flags for mount options.
1385 * Note: don't forget to add new options to btrfs_show_options()
1387 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1388 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1389 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1390 #define BTRFS_MOUNT_SSD (1 << 3)
1391 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1392 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1393 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1394 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1395 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1396 #define BTRFS_MOUNT_NOSSD (1 << 9)
1397 #define BTRFS_MOUNT_DISCARD (1 << 10)
1398 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1399 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1400 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1401 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1402 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1403 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1404 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1405 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1407 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1408 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1409 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1414 #define BTRFS_INODE_NODATASUM (1 << 0)
1415 #define BTRFS_INODE_NODATACOW (1 << 1)
1416 #define BTRFS_INODE_READONLY (1 << 2)
1417 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1418 #define BTRFS_INODE_PREALLOC (1 << 4)
1419 #define BTRFS_INODE_SYNC (1 << 5)
1420 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1421 #define BTRFS_INODE_APPEND (1 << 7)
1422 #define BTRFS_INODE_NODUMP (1 << 8)
1423 #define BTRFS_INODE_NOATIME (1 << 9)
1424 #define BTRFS_INODE_DIRSYNC (1 << 10)
1425 #define BTRFS_INODE_COMPRESS (1 << 11)
1427 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1429 /* some macros to generate set/get funcs for the struct fields. This
1430 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1433 #define le8_to_cpu(v) (v)
1434 #define cpu_to_le8(v) (v)
1437 #define read_eb_member(eb, ptr, type, member, result) ( \
1438 read_extent_buffer(eb, (char *)(result), \
1439 ((unsigned long)(ptr)) + \
1440 offsetof(type, member), \
1441 sizeof(((type *)0)->member)))
1443 #define write_eb_member(eb, ptr, type, member, result) ( \
1444 write_extent_buffer(eb, (char *)(result), \
1445 ((unsigned long)(ptr)) + \
1446 offsetof(type, member), \
1447 sizeof(((type *)0)->member)))
1449 #ifndef BTRFS_SETGET_FUNCS
1450 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1451 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1452 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1455 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1456 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1458 type *p = page_address(eb->first_page); \
1459 u##bits res = le##bits##_to_cpu(p->member); \
1462 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1465 type *p = page_address(eb->first_page); \
1466 p->member = cpu_to_le##bits(val); \
1469 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1470 static inline u##bits btrfs_##name(type *s) \
1472 return le##bits##_to_cpu(s->member); \
1474 static inline void btrfs_set_##name(type *s, u##bits val) \
1476 s->member = cpu_to_le##bits(val); \
1479 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1480 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1481 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1482 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1483 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1484 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1486 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1487 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1488 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1489 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1490 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1491 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1493 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1494 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1496 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1498 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1500 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1502 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1504 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1505 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1507 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1509 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1511 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1514 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1516 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1519 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1521 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1524 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1525 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1526 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1527 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1528 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1529 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1530 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1531 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1532 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1533 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1534 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1536 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1538 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1541 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1542 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1543 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1545 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1547 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1549 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1551 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1552 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1554 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1556 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1557 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1559 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1562 unsigned long offset
= (unsigned long)c
;
1563 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1564 offset
+= nr
* sizeof(struct btrfs_stripe
);
1565 return (struct btrfs_stripe
*)offset
;
1568 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1570 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1573 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1574 struct btrfs_chunk
*c
, int nr
)
1576 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1579 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1580 struct btrfs_chunk
*c
, int nr
)
1582 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1585 /* struct btrfs_block_group_item */
1586 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1588 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1590 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1591 struct btrfs_block_group_item
, chunk_objectid
, 64);
1593 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1594 struct btrfs_block_group_item
, chunk_objectid
, 64);
1595 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1596 struct btrfs_block_group_item
, flags
, 64);
1597 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1598 struct btrfs_block_group_item
, flags
, 64);
1600 /* struct btrfs_inode_ref */
1601 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1602 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1604 /* struct btrfs_inode_item */
1605 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1606 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1607 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1608 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1609 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1610 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1611 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1612 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1613 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1614 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1615 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1616 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1618 static inline struct btrfs_timespec
*
1619 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1621 unsigned long ptr
= (unsigned long)inode_item
;
1622 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1623 return (struct btrfs_timespec
*)ptr
;
1626 static inline struct btrfs_timespec
*
1627 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1629 unsigned long ptr
= (unsigned long)inode_item
;
1630 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1631 return (struct btrfs_timespec
*)ptr
;
1634 static inline struct btrfs_timespec
*
1635 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1637 unsigned long ptr
= (unsigned long)inode_item
;
1638 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1639 return (struct btrfs_timespec
*)ptr
;
1642 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1643 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1645 /* struct btrfs_dev_extent */
1646 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1648 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1649 chunk_objectid
, 64);
1650 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1652 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1654 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1656 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1657 return (u8
*)((unsigned long)dev
+ ptr
);
1660 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1661 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1663 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1665 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1668 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1670 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1671 struct btrfs_tree_block_info
*item
,
1672 struct btrfs_disk_key
*key
)
1674 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1677 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1678 struct btrfs_tree_block_info
*item
,
1679 struct btrfs_disk_key
*key
)
1681 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1684 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1686 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1688 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1690 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1693 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1696 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1698 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1701 static inline u32
btrfs_extent_inline_ref_size(int type
)
1703 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1704 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1705 return sizeof(struct btrfs_extent_inline_ref
);
1706 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1707 return sizeof(struct btrfs_shared_data_ref
) +
1708 sizeof(struct btrfs_extent_inline_ref
);
1709 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1710 return sizeof(struct btrfs_extent_data_ref
) +
1711 offsetof(struct btrfs_extent_inline_ref
, offset
);
1716 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1717 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1719 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1720 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1722 /* struct btrfs_node */
1723 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1724 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1726 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1729 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1730 sizeof(struct btrfs_key_ptr
) * nr
;
1731 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1734 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1738 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1739 sizeof(struct btrfs_key_ptr
) * nr
;
1740 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1743 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1746 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1747 sizeof(struct btrfs_key_ptr
) * nr
;
1748 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1751 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1755 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1756 sizeof(struct btrfs_key_ptr
) * nr
;
1757 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1760 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1762 return offsetof(struct btrfs_node
, ptrs
) +
1763 sizeof(struct btrfs_key_ptr
) * nr
;
1766 void btrfs_node_key(struct extent_buffer
*eb
,
1767 struct btrfs_disk_key
*disk_key
, int nr
);
1769 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1770 struct btrfs_disk_key
*disk_key
, int nr
)
1773 ptr
= btrfs_node_key_ptr_offset(nr
);
1774 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1775 struct btrfs_key_ptr
, key
, disk_key
);
1778 /* struct btrfs_item */
1779 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1780 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1782 static inline unsigned long btrfs_item_nr_offset(int nr
)
1784 return offsetof(struct btrfs_leaf
, items
) +
1785 sizeof(struct btrfs_item
) * nr
;
1788 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1791 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1794 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1795 struct btrfs_item
*item
)
1797 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1800 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1802 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1805 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1807 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1810 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1812 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1815 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1816 struct btrfs_disk_key
*disk_key
, int nr
)
1818 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1819 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1822 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1823 struct btrfs_disk_key
*disk_key
, int nr
)
1825 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1826 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1829 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1832 * struct btrfs_root_ref
1834 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1835 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1836 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1838 /* struct btrfs_dir_item */
1839 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1840 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1841 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1842 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1844 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1845 struct btrfs_dir_item
*item
,
1846 struct btrfs_disk_key
*key
)
1848 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1851 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1852 struct btrfs_dir_item
*item
,
1853 struct btrfs_disk_key
*key
)
1855 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1858 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1860 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1862 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1865 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1866 struct btrfs_free_space_header
*h
,
1867 struct btrfs_disk_key
*key
)
1869 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1872 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1873 struct btrfs_free_space_header
*h
,
1874 struct btrfs_disk_key
*key
)
1876 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1879 /* struct btrfs_disk_key */
1880 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1882 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1883 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1885 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1886 struct btrfs_disk_key
*disk
)
1888 cpu
->offset
= le64_to_cpu(disk
->offset
);
1889 cpu
->type
= disk
->type
;
1890 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1893 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1894 struct btrfs_key
*cpu
)
1896 disk
->offset
= cpu_to_le64(cpu
->offset
);
1897 disk
->type
= cpu
->type
;
1898 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1901 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1902 struct btrfs_key
*key
, int nr
)
1904 struct btrfs_disk_key disk_key
;
1905 btrfs_node_key(eb
, &disk_key
, nr
);
1906 btrfs_disk_key_to_cpu(key
, &disk_key
);
1909 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1910 struct btrfs_key
*key
, int nr
)
1912 struct btrfs_disk_key disk_key
;
1913 btrfs_item_key(eb
, &disk_key
, nr
);
1914 btrfs_disk_key_to_cpu(key
, &disk_key
);
1917 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1918 struct btrfs_dir_item
*item
,
1919 struct btrfs_key
*key
)
1921 struct btrfs_disk_key disk_key
;
1922 btrfs_dir_item_key(eb
, item
, &disk_key
);
1923 btrfs_disk_key_to_cpu(key
, &disk_key
);
1927 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1932 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1937 /* struct btrfs_header */
1938 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1939 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1941 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1942 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1943 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1944 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1946 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1948 return (btrfs_header_flags(eb
) & flag
) == flag
;
1951 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1953 u64 flags
= btrfs_header_flags(eb
);
1954 btrfs_set_header_flags(eb
, flags
| flag
);
1955 return (flags
& flag
) == flag
;
1958 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1960 u64 flags
= btrfs_header_flags(eb
);
1961 btrfs_set_header_flags(eb
, flags
& ~flag
);
1962 return (flags
& flag
) == flag
;
1965 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1967 u64 flags
= btrfs_header_flags(eb
);
1968 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1971 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1974 u64 flags
= btrfs_header_flags(eb
);
1975 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1976 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1977 btrfs_set_header_flags(eb
, flags
);
1980 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1982 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1986 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1988 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1992 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1994 return btrfs_header_level(eb
) == 0;
1997 /* struct btrfs_root_item */
1998 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2000 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2001 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2002 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2004 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2006 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2007 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2008 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2009 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2010 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2011 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2012 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2013 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2016 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2018 return root
->root_item
.flags
& BTRFS_ROOT_SUBVOL_RDONLY
;
2021 /* struct btrfs_root_backup */
2022 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2024 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2026 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2027 tree_root_level
, 8);
2029 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2031 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2032 chunk_root_gen
, 64);
2033 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2034 chunk_root_level
, 8);
2036 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2038 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2039 extent_root_gen
, 64);
2040 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2041 extent_root_level
, 8);
2043 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2045 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2047 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2050 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2052 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2054 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2057 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2059 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2061 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2062 csum_root_level
, 8);
2063 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2065 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2067 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2070 /* struct btrfs_super_block */
2072 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2073 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2074 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2076 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2077 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2078 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2079 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2080 struct btrfs_super_block
, chunk_root_generation
, 64);
2081 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2083 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2085 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2086 chunk_root_level
, 8);
2087 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2089 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2090 log_root_transid
, 64);
2091 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2093 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2095 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2097 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2099 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2101 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2103 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2105 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2106 root_dir_objectid
, 64);
2107 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2109 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2111 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2112 compat_ro_flags
, 64);
2113 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2114 incompat_flags
, 64);
2115 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2117 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2118 cache_generation
, 64);
2120 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2122 int t
= btrfs_super_csum_type(s
);
2123 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2124 return btrfs_csum_sizes
[t
];
2127 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2129 return offsetof(struct btrfs_leaf
, items
);
2132 /* struct btrfs_file_extent_item */
2133 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2135 static inline unsigned long
2136 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2138 unsigned long offset
= (unsigned long)e
;
2139 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2143 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2145 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2148 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2150 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2152 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2153 disk_num_bytes
, 64);
2154 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2156 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2158 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2160 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2162 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2164 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2165 other_encoding
, 16);
2167 /* this returns the number of file bytes represented by the inline item.
2168 * If an item is compressed, this is the uncompressed size
2170 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2171 struct btrfs_file_extent_item
*e
)
2173 return btrfs_file_extent_ram_bytes(eb
, e
);
2177 * this returns the number of bytes used by the item on disk, minus the
2178 * size of any extent headers. If a file is compressed on disk, this is
2179 * the compressed size
2181 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2182 struct btrfs_item
*e
)
2184 unsigned long offset
;
2185 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2186 return btrfs_item_size(eb
, e
) - offset
;
2189 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
2191 return sb
->s_fs_info
;
2194 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2197 return root
->leafsize
;
2198 return root
->nodesize
;
2201 /* helper function to cast into the data area of the leaf. */
2202 #define btrfs_item_ptr(leaf, slot, type) \
2203 ((type *)(btrfs_leaf_data(leaf) + \
2204 btrfs_item_offset_nr(leaf, slot)))
2206 #define btrfs_item_ptr_offset(leaf, slot) \
2207 ((unsigned long)(btrfs_leaf_data(leaf) + \
2208 btrfs_item_offset_nr(leaf, slot)))
2210 static inline struct dentry
*fdentry(struct file
*file
)
2212 return file
->f_path
.dentry
;
2215 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2217 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2218 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2221 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2223 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
2227 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2230 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2235 * Doing a truncate won't result in new nodes or leaves, just what we need for
2238 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2241 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2245 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2246 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2247 struct btrfs_root
*root
, unsigned long count
);
2248 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2249 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2250 struct btrfs_root
*root
, u64 bytenr
,
2251 u64 num_bytes
, u64
*refs
, u64
*flags
);
2252 int btrfs_pin_extent(struct btrfs_root
*root
,
2253 u64 bytenr
, u64 num
, int reserved
);
2254 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle
*trans
,
2255 struct btrfs_root
*root
,
2256 u64 bytenr
, u64 num_bytes
);
2257 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2258 struct btrfs_root
*root
,
2259 u64 objectid
, u64 offset
, u64 bytenr
);
2260 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2261 struct btrfs_fs_info
*info
,
2263 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2264 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2265 u64 search_start
, u64 search_hint
, int owner
);
2266 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2267 struct btrfs_root
*root
, u32 blocksize
,
2268 u64 parent
, u64 root_objectid
,
2269 struct btrfs_disk_key
*key
, int level
,
2270 u64 hint
, u64 empty_size
);
2271 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2272 struct btrfs_root
*root
,
2273 struct extent_buffer
*buf
,
2274 u64 parent
, int last_ref
);
2275 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2276 struct btrfs_root
*root
,
2277 u64 bytenr
, u32 blocksize
,
2279 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2280 struct btrfs_root
*root
,
2281 u64 root_objectid
, u64 owner
,
2282 u64 offset
, struct btrfs_key
*ins
);
2283 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2284 struct btrfs_root
*root
,
2285 u64 root_objectid
, u64 owner
, u64 offset
,
2286 struct btrfs_key
*ins
);
2287 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2288 struct btrfs_root
*root
,
2289 u64 num_bytes
, u64 min_alloc_size
,
2290 u64 empty_size
, u64 hint_byte
,
2291 u64 search_end
, struct btrfs_key
*ins
,
2293 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2294 struct extent_buffer
*buf
, int full_backref
);
2295 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2296 struct extent_buffer
*buf
, int full_backref
);
2297 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2298 struct btrfs_root
*root
,
2299 u64 bytenr
, u64 num_bytes
, u64 flags
,
2301 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2302 struct btrfs_root
*root
,
2303 u64 bytenr
, u64 num_bytes
, u64 parent
,
2304 u64 root_objectid
, u64 owner
, u64 offset
);
2306 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2307 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
2308 u64 start
, u64 len
);
2309 int btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2310 struct btrfs_root
*root
);
2311 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2312 struct btrfs_root
*root
);
2313 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2314 struct btrfs_root
*root
,
2315 u64 bytenr
, u64 num_bytes
, u64 parent
,
2316 u64 root_objectid
, u64 owner
, u64 offset
);
2318 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2319 struct btrfs_root
*root
);
2320 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2321 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2322 int btrfs_read_block_groups(struct btrfs_root
*root
);
2323 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2324 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2325 struct btrfs_root
*root
, u64 bytes_used
,
2326 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2328 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2329 struct btrfs_root
*root
, u64 group_start
);
2330 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2331 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2332 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2333 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2334 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
2335 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
2336 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2337 struct btrfs_root
*root
);
2338 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2339 struct inode
*inode
);
2340 void btrfs_orphan_release_metadata(struct inode
*inode
);
2341 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
2342 struct btrfs_pending_snapshot
*pending
);
2343 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2344 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2345 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
2346 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
2347 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2348 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2349 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2350 struct btrfs_block_rsv
*rsv
);
2351 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2352 struct btrfs_block_rsv
*block_rsv
,
2354 int btrfs_block_rsv_check(struct btrfs_root
*root
,
2355 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2356 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2357 struct btrfs_block_rsv
*block_rsv
,
2359 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2360 struct btrfs_block_rsv
*dst_rsv
,
2362 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2363 struct btrfs_block_rsv
*block_rsv
,
2365 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2366 struct btrfs_block_group_cache
*cache
);
2367 int btrfs_set_block_group_rw(struct btrfs_root
*root
,
2368 struct btrfs_block_group_cache
*cache
);
2369 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2370 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2371 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2372 u64 start
, u64 end
);
2373 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2374 u64 num_bytes
, u64
*actual_bytes
);
2375 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2376 struct btrfs_root
*root
, u64 type
);
2377 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
2379 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2381 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2382 int level
, int *slot
);
2383 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2384 int btrfs_previous_item(struct btrfs_root
*root
,
2385 struct btrfs_path
*path
, u64 min_objectid
,
2387 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2388 struct btrfs_root
*root
, struct btrfs_path
*path
,
2389 struct btrfs_key
*new_key
);
2390 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2391 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2392 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2393 struct btrfs_key
*key
, int lowest_level
,
2394 int cache_only
, u64 min_trans
);
2395 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2396 struct btrfs_key
*max_key
,
2397 struct btrfs_path
*path
, int cache_only
,
2399 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2400 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2401 struct extent_buffer
*parent
, int parent_slot
,
2402 struct extent_buffer
**cow_ret
);
2403 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2404 struct btrfs_root
*root
,
2405 struct extent_buffer
*buf
,
2406 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2407 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2408 struct extent_buffer
*buf
);
2409 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2410 *root
, struct btrfs_path
*path
, u32 data_size
);
2411 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2412 struct btrfs_root
*root
,
2413 struct btrfs_path
*path
,
2414 u32 new_size
, int from_end
);
2415 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2416 struct btrfs_root
*root
,
2417 struct btrfs_path
*path
,
2418 struct btrfs_key
*new_key
,
2419 unsigned long split_offset
);
2420 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2421 struct btrfs_root
*root
,
2422 struct btrfs_path
*path
,
2423 struct btrfs_key
*new_key
);
2424 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2425 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2427 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2428 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2429 int start_slot
, int cache_only
, u64
*last_ret
,
2430 struct btrfs_key
*progress
);
2431 void btrfs_release_path(struct btrfs_path
*p
);
2432 struct btrfs_path
*btrfs_alloc_path(void);
2433 void btrfs_free_path(struct btrfs_path
*p
);
2434 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2435 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2436 struct extent_buffer
*held
, int held_rw
);
2437 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2439 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2440 struct btrfs_path
*path
, int slot
, int nr
);
2441 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2442 struct btrfs_root
*root
,
2443 struct btrfs_path
*path
)
2445 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2448 int setup_items_for_insert(struct btrfs_trans_handle
*trans
,
2449 struct btrfs_root
*root
, struct btrfs_path
*path
,
2450 struct btrfs_key
*cpu_key
, u32
*data_size
,
2451 u32 total_data
, u32 total_size
, int nr
);
2452 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2453 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2454 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2455 struct btrfs_root
*root
,
2456 struct btrfs_path
*path
,
2457 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2459 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2460 struct btrfs_root
*root
,
2461 struct btrfs_path
*path
,
2462 struct btrfs_key
*key
,
2465 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2468 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2469 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2470 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2471 void btrfs_drop_snapshot(struct btrfs_root
*root
,
2472 struct btrfs_block_rsv
*block_rsv
, int update_ref
);
2473 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2474 struct btrfs_root
*root
,
2475 struct extent_buffer
*node
,
2476 struct extent_buffer
*parent
);
2477 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2480 * Get synced with close_ctree()
2483 return fs_info
->closing
;
2485 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
2487 kfree(fs_info
->delayed_root
);
2488 kfree(fs_info
->extent_root
);
2489 kfree(fs_info
->tree_root
);
2490 kfree(fs_info
->chunk_root
);
2491 kfree(fs_info
->dev_root
);
2492 kfree(fs_info
->csum_root
);
2493 kfree(fs_info
->super_copy
);
2494 kfree(fs_info
->super_for_commit
);
2499 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2500 struct btrfs_path
*path
,
2501 u64 root_id
, u64 ref_id
);
2502 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2503 struct btrfs_root
*tree_root
,
2504 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2505 const char *name
, int name_len
);
2506 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2507 struct btrfs_root
*tree_root
,
2508 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2509 const char *name
, int name_len
);
2510 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2511 struct btrfs_key
*key
);
2512 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2513 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2515 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2516 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2518 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2519 btrfs_root_item
*item
, struct btrfs_key
*key
);
2520 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2521 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2522 void btrfs_set_root_node(struct btrfs_root_item
*item
,
2523 struct extent_buffer
*node
);
2524 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2527 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2528 struct btrfs_root
*root
, const char *name
,
2529 int name_len
, struct inode
*dir
,
2530 struct btrfs_key
*location
, u8 type
, u64 index
);
2531 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2532 struct btrfs_root
*root
,
2533 struct btrfs_path
*path
, u64 dir
,
2534 const char *name
, int name_len
,
2536 struct btrfs_dir_item
*
2537 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2538 struct btrfs_root
*root
,
2539 struct btrfs_path
*path
, u64 dir
,
2540 u64 objectid
, const char *name
, int name_len
,
2542 struct btrfs_dir_item
*
2543 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2544 struct btrfs_path
*path
, u64 dirid
,
2545 const char *name
, int name_len
);
2546 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2547 struct btrfs_path
*path
,
2548 const char *name
, int name_len
);
2549 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2550 struct btrfs_root
*root
,
2551 struct btrfs_path
*path
,
2552 struct btrfs_dir_item
*di
);
2553 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2554 struct btrfs_root
*root
,
2555 struct btrfs_path
*path
, u64 objectid
,
2556 const char *name
, u16 name_len
,
2557 const void *data
, u16 data_len
);
2558 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2559 struct btrfs_root
*root
,
2560 struct btrfs_path
*path
, u64 dir
,
2561 const char *name
, u16 name_len
,
2563 int verify_dir_item(struct btrfs_root
*root
,
2564 struct extent_buffer
*leaf
,
2565 struct btrfs_dir_item
*dir_item
);
2568 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2569 struct btrfs_root
*root
, u64 offset
);
2570 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2571 struct btrfs_root
*root
, u64 offset
);
2572 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2575 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2576 struct btrfs_root
*root
,
2577 const char *name
, int name_len
,
2578 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2579 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2580 struct btrfs_root
*root
,
2581 const char *name
, int name_len
,
2582 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2583 struct btrfs_inode_ref
*
2584 btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2585 struct btrfs_root
*root
,
2586 struct btrfs_path
*path
,
2587 const char *name
, int name_len
,
2588 u64 inode_objectid
, u64 ref_objectid
, int mod
);
2589 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2590 struct btrfs_root
*root
,
2591 struct btrfs_path
*path
, u64 objectid
);
2592 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2593 *root
, struct btrfs_path
*path
,
2594 struct btrfs_key
*location
, int mod
);
2597 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2598 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2599 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2600 struct bio
*bio
, u32
*dst
);
2601 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
2602 struct bio
*bio
, u64 logical_offset
, u32
*dst
);
2603 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2604 struct btrfs_root
*root
,
2605 u64 objectid
, u64 pos
,
2606 u64 disk_offset
, u64 disk_num_bytes
,
2607 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2608 u8 compression
, u8 encryption
, u16 other_encoding
);
2609 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2610 struct btrfs_root
*root
,
2611 struct btrfs_path
*path
, u64 objectid
,
2612 u64 bytenr
, int mod
);
2613 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2614 struct btrfs_root
*root
,
2615 struct btrfs_ordered_sum
*sums
);
2616 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2617 struct bio
*bio
, u64 file_start
, int contig
);
2618 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2619 struct btrfs_root
*root
,
2620 struct btrfs_path
*path
,
2621 u64 bytenr
, int cow
);
2622 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2623 struct btrfs_root
*root
, struct btrfs_path
*path
,
2625 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
2626 struct list_head
*list
, int search_commit
);
2628 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
2629 size_t pg_offset
, u64 start
, u64 len
,
2632 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2633 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2634 #define ClearPageChecked ClearPageFsMisc
2635 #define SetPageChecked SetPageFsMisc
2636 #define PageChecked PageFsMisc
2639 /* This forces readahead on a given range of bytes in an inode */
2640 static inline void btrfs_force_ra(struct address_space
*mapping
,
2641 struct file_ra_state
*ra
, struct file
*file
,
2642 pgoff_t offset
, unsigned long req_size
)
2644 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
2647 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2648 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2649 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2650 struct btrfs_root
*root
,
2651 struct inode
*dir
, struct inode
*inode
,
2652 const char *name
, int name_len
);
2653 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2654 struct inode
*parent_inode
, struct inode
*inode
,
2655 const char *name
, int name_len
, int add_backref
, u64 index
);
2656 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2657 struct btrfs_root
*root
,
2658 struct inode
*dir
, u64 objectid
,
2659 const char *name
, int name_len
);
2660 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2661 struct btrfs_root
*root
,
2662 struct inode
*inode
, u64 new_size
,
2665 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2666 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
2667 struct extent_state
**cached_state
);
2668 int btrfs_writepages(struct address_space
*mapping
,
2669 struct writeback_control
*wbc
);
2670 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2671 struct btrfs_root
*new_root
, u64 new_dirid
);
2672 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2673 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2675 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2676 int btrfs_readpage(struct file
*file
, struct page
*page
);
2677 void btrfs_evict_inode(struct inode
*inode
);
2678 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
2679 void btrfs_dirty_inode(struct inode
*inode
, int flags
);
2680 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2681 void btrfs_destroy_inode(struct inode
*inode
);
2682 int btrfs_drop_inode(struct inode
*inode
);
2683 int btrfs_init_cachep(void);
2684 void btrfs_destroy_cachep(void);
2685 long btrfs_ioctl_trans_end(struct file
*file
);
2686 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2687 struct btrfs_root
*root
, int *was_new
);
2688 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2689 size_t pg_offset
, u64 start
, u64 end
,
2691 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2692 struct btrfs_root
*root
,
2693 struct inode
*inode
);
2694 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2695 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2696 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
2697 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
2698 struct btrfs_root
*root
);
2699 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
2700 int btrfs_invalidate_inodes(struct btrfs_root
*root
);
2701 void btrfs_add_delayed_iput(struct inode
*inode
);
2702 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
2703 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
2704 u64 start
, u64 num_bytes
, u64 min_size
,
2705 loff_t actual_len
, u64
*alloc_hint
);
2706 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
2707 struct btrfs_trans_handle
*trans
, int mode
,
2708 u64 start
, u64 num_bytes
, u64 min_size
,
2709 loff_t actual_len
, u64
*alloc_hint
);
2710 extern const struct dentry_operations btrfs_dentry_operations
;
2713 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2714 void btrfs_update_iflags(struct inode
*inode
);
2715 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2716 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
2717 struct btrfs_ioctl_defrag_range_args
*range
,
2718 u64 newer_than
, unsigned long max_pages
);
2720 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
2721 struct inode
*inode
);
2722 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
2723 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
2724 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2726 extern const struct file_operations btrfs_file_operations
;
2727 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
2728 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
2729 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2730 struct inode
*inode
, u64 start
, u64 end
);
2731 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2732 void btrfs_drop_pages(struct page
**pages
, size_t num_pages
);
2733 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
2734 struct page
**pages
, size_t num_pages
,
2735 loff_t pos
, size_t write_bytes
,
2736 struct extent_state
**cached
);
2739 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2740 struct btrfs_root
*root
, int cache_only
);
2743 int btrfs_init_sysfs(void);
2744 void btrfs_exit_sysfs(void);
2747 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2750 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2751 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2752 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
2753 unsigned int line
, int errno
);
2755 #define btrfs_std_error(fs_info, errno) \
2758 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2762 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2763 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
2764 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2765 struct inode
*inode
, struct inode
*dir
);
2766 int btrfs_acl_chmod(struct inode
*inode
);
2768 #define btrfs_get_acl NULL
2769 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2770 struct inode
*inode
, struct inode
*dir
)
2774 static inline int btrfs_acl_chmod(struct inode
*inode
)
2781 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
2782 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
2783 struct btrfs_root
*root
);
2784 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
2785 struct btrfs_root
*root
);
2786 int btrfs_recover_relocation(struct btrfs_root
*root
);
2787 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
2788 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
2789 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2790 struct extent_buffer
*cow
);
2791 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
2792 struct btrfs_pending_snapshot
*pending
,
2793 u64
*bytes_to_reserve
);
2794 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
2795 struct btrfs_pending_snapshot
*pending
);
2798 int btrfs_scrub_dev(struct btrfs_root
*root
, u64 devid
, u64 start
, u64 end
,
2799 struct btrfs_scrub_progress
*progress
, int readonly
);
2800 int btrfs_scrub_pause(struct btrfs_root
*root
);
2801 int btrfs_scrub_pause_super(struct btrfs_root
*root
);
2802 int btrfs_scrub_continue(struct btrfs_root
*root
);
2803 int btrfs_scrub_continue_super(struct btrfs_root
*root
);
2804 int btrfs_scrub_cancel(struct btrfs_root
*root
);
2805 int btrfs_scrub_cancel_dev(struct btrfs_root
*root
, struct btrfs_device
*dev
);
2806 int btrfs_scrub_cancel_devid(struct btrfs_root
*root
, u64 devid
);
2807 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
2808 struct btrfs_scrub_progress
*progress
);