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 (1ULL << 0)
755 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
756 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
757 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
758 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
759 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
760 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
761 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
762 #define BTRFS_NR_RAID_TYPES 5
764 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
765 BTRFS_BLOCK_GROUP_SYSTEM | \
766 BTRFS_BLOCK_GROUP_METADATA)
768 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
769 BTRFS_BLOCK_GROUP_RAID1 | \
770 BTRFS_BLOCK_GROUP_DUP | \
771 BTRFS_BLOCK_GROUP_RAID10)
773 * We need a bit for restriper to be able to tell when chunks of type
774 * SINGLE are available. This "extended" profile format is used in
775 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
776 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
777 * to avoid remappings between two formats in future.
779 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
781 struct btrfs_block_group_item
{
783 __le64 chunk_objectid
;
785 } __attribute__ ((__packed__
));
787 struct btrfs_space_info
{
790 u64 total_bytes
; /* total bytes in the space,
791 this doesn't take mirrors into account */
792 u64 bytes_used
; /* total bytes used,
793 this doesn't take mirrors into account */
794 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
795 transaction finishes */
796 u64 bytes_reserved
; /* total bytes the allocator has reserved for
797 current allocations */
798 u64 bytes_readonly
; /* total bytes that are read only */
800 u64 bytes_may_use
; /* number of bytes that may be used for
801 delalloc/allocations */
802 u64 disk_used
; /* total bytes used on disk */
803 u64 disk_total
; /* total bytes on disk, takes mirrors into
807 * we bump reservation progress every time we decrement
808 * bytes_reserved. This way people waiting for reservations
809 * know something good has happened and they can check
810 * for progress. The number here isn't to be trusted, it
811 * just shows reclaim activity
813 unsigned long reservation_progress
;
815 unsigned int full
:1; /* indicates that we cannot allocate any more
816 chunks for this space */
817 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
819 unsigned int flush
:1; /* set if we are trying to make space */
821 unsigned int force_alloc
; /* set if we need to force a chunk
822 alloc for this space */
824 struct list_head list
;
826 /* for block groups in our same type */
827 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
829 struct rw_semaphore groups_sem
;
830 wait_queue_head_t wait
;
833 struct btrfs_block_rsv
{
836 struct btrfs_space_info
*space_info
;
842 * free clusters are used to claim free space in relatively large chunks,
843 * allowing us to do less seeky writes. They are used for all metadata
844 * allocations and data allocations in ssd mode.
846 struct btrfs_free_cluster
{
848 spinlock_t refill_lock
;
851 /* largest extent in this cluster */
854 /* first extent starting offset */
857 struct btrfs_block_group_cache
*block_group
;
859 * when a cluster is allocated from a block group, we put the
860 * cluster onto a list in the block group so that it can
861 * be freed before the block group is freed.
863 struct list_head block_group_list
;
866 enum btrfs_caching_type
{
868 BTRFS_CACHE_STARTED
= 1,
869 BTRFS_CACHE_FAST
= 2,
870 BTRFS_CACHE_FINISHED
= 3,
873 enum btrfs_disk_cache_state
{
874 BTRFS_DC_WRITTEN
= 0,
878 BTRFS_DC_NEED_WRITE
= 4,
881 struct btrfs_caching_control
{
882 struct list_head list
;
884 wait_queue_head_t wait
;
885 struct btrfs_work work
;
886 struct btrfs_block_group_cache
*block_group
;
891 struct btrfs_block_group_cache
{
892 struct btrfs_key key
;
893 struct btrfs_block_group_item item
;
894 struct btrfs_fs_info
*fs_info
;
902 u64 cache_generation
;
904 unsigned int dirty
:1;
907 int disk_cache_state
;
909 /* cache tracking stuff */
911 struct btrfs_caching_control
*caching_ctl
;
912 u64 last_byte_to_unpin
;
914 struct btrfs_space_info
*space_info
;
916 /* free space cache stuff */
917 struct btrfs_free_space_ctl
*free_space_ctl
;
919 /* block group cache stuff */
920 struct rb_node cache_node
;
922 /* for block groups in the same raid type */
923 struct list_head list
;
928 /* List of struct btrfs_free_clusters for this block group.
929 * Today it will only have one thing on it, but that may change
931 struct list_head cluster_list
;
934 struct reloc_control
;
936 struct btrfs_fs_devices
;
937 struct btrfs_delayed_root
;
938 struct btrfs_fs_info
{
939 u8 fsid
[BTRFS_FSID_SIZE
];
940 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
941 struct btrfs_root
*extent_root
;
942 struct btrfs_root
*tree_root
;
943 struct btrfs_root
*chunk_root
;
944 struct btrfs_root
*dev_root
;
945 struct btrfs_root
*fs_root
;
946 struct btrfs_root
*csum_root
;
948 /* the log root tree is a directory of all the other log roots */
949 struct btrfs_root
*log_root_tree
;
951 spinlock_t fs_roots_radix_lock
;
952 struct radix_tree_root fs_roots_radix
;
954 /* block group cache stuff */
955 spinlock_t block_group_cache_lock
;
956 struct rb_root block_group_cache_tree
;
958 /* keep track of unallocated space */
959 spinlock_t free_chunk_lock
;
960 u64 free_chunk_space
;
962 struct extent_io_tree freed_extents
[2];
963 struct extent_io_tree
*pinned_extents
;
965 /* logical->physical extent mapping */
966 struct btrfs_mapping_tree mapping_tree
;
969 * block reservation for extent, checksum, root tree and
970 * delayed dir index item
972 struct btrfs_block_rsv global_block_rsv
;
973 /* block reservation for delay allocation */
974 struct btrfs_block_rsv delalloc_block_rsv
;
975 /* block reservation for metadata operations */
976 struct btrfs_block_rsv trans_block_rsv
;
977 /* block reservation for chunk tree */
978 struct btrfs_block_rsv chunk_block_rsv
;
979 /* block reservation for delayed operations */
980 struct btrfs_block_rsv delayed_block_rsv
;
982 struct btrfs_block_rsv empty_block_rsv
;
985 u64 last_trans_committed
;
988 * this is updated to the current trans every time a full commit
989 * is required instead of the faster short fsync log commits
991 u64 last_trans_log_full_commit
;
992 unsigned long mount_opt
:20;
993 unsigned long compress_type
:4;
996 struct btrfs_transaction
*running_transaction
;
997 wait_queue_head_t transaction_throttle
;
998 wait_queue_head_t transaction_wait
;
999 wait_queue_head_t transaction_blocked_wait
;
1000 wait_queue_head_t async_submit_wait
;
1002 struct btrfs_super_block
*super_copy
;
1003 struct btrfs_super_block
*super_for_commit
;
1004 struct block_device
*__bdev
;
1005 struct super_block
*sb
;
1006 struct inode
*btree_inode
;
1007 struct backing_dev_info bdi
;
1008 struct mutex tree_log_mutex
;
1009 struct mutex transaction_kthread_mutex
;
1010 struct mutex cleaner_mutex
;
1011 struct mutex chunk_mutex
;
1012 struct mutex volume_mutex
;
1014 * this protects the ordered operations list only while we are
1015 * processing all of the entries on it. This way we make
1016 * sure the commit code doesn't find the list temporarily empty
1017 * because another function happens to be doing non-waiting preflush
1018 * before jumping into the main commit.
1020 struct mutex ordered_operations_mutex
;
1021 struct rw_semaphore extent_commit_sem
;
1023 struct rw_semaphore cleanup_work_sem
;
1025 struct rw_semaphore subvol_sem
;
1026 struct srcu_struct subvol_srcu
;
1028 spinlock_t trans_lock
;
1030 * the reloc mutex goes with the trans lock, it is taken
1031 * during commit to protect us from the relocation code
1033 struct mutex reloc_mutex
;
1035 struct list_head trans_list
;
1036 struct list_head hashers
;
1037 struct list_head dead_roots
;
1038 struct list_head caching_block_groups
;
1040 spinlock_t delayed_iput_lock
;
1041 struct list_head delayed_iputs
;
1043 atomic_t nr_async_submits
;
1044 atomic_t async_submit_draining
;
1045 atomic_t nr_async_bios
;
1046 atomic_t async_delalloc_pages
;
1047 atomic_t open_ioctl_trans
;
1050 * this is used by the balancing code to wait for all the pending
1053 spinlock_t ordered_extent_lock
;
1056 * all of the data=ordered extents pending writeback
1057 * these can span multiple transactions and basically include
1058 * every dirty data page that isn't from nodatacow
1060 struct list_head ordered_extents
;
1063 * all of the inodes that have delalloc bytes. It is possible for
1064 * this list to be empty even when there is still dirty data=ordered
1065 * extents waiting to finish IO.
1067 struct list_head delalloc_inodes
;
1070 * special rename and truncate targets that must be on disk before
1071 * we're allowed to commit. This is basically the ext3 style
1072 * data=ordered list.
1074 struct list_head ordered_operations
;
1077 * there is a pool of worker threads for checksumming during writes
1078 * and a pool for checksumming after reads. This is because readers
1079 * can run with FS locks held, and the writers may be waiting for
1080 * those locks. We don't want ordering in the pending list to cause
1081 * deadlocks, and so the two are serviced separately.
1083 * A third pool does submit_bio to avoid deadlocking with the other
1086 struct btrfs_workers generic_worker
;
1087 struct btrfs_workers workers
;
1088 struct btrfs_workers delalloc_workers
;
1089 struct btrfs_workers endio_workers
;
1090 struct btrfs_workers endio_meta_workers
;
1091 struct btrfs_workers endio_meta_write_workers
;
1092 struct btrfs_workers endio_write_workers
;
1093 struct btrfs_workers endio_freespace_worker
;
1094 struct btrfs_workers submit_workers
;
1095 struct btrfs_workers caching_workers
;
1096 struct btrfs_workers readahead_workers
;
1099 * fixup workers take dirty pages that didn't properly go through
1100 * the cow mechanism and make them safe to write. It happens
1101 * for the sys_munmap function call path
1103 struct btrfs_workers fixup_workers
;
1104 struct btrfs_workers delayed_workers
;
1105 struct task_struct
*transaction_kthread
;
1106 struct task_struct
*cleaner_kthread
;
1107 int thread_pool_size
;
1109 struct kobject super_kobj
;
1110 struct completion kobj_unregister
;
1113 int log_root_recovering
;
1119 /* protected by the delalloc lock, used to keep from writing
1120 * metadata until there is a nice batch
1122 u64 dirty_metadata_bytes
;
1123 struct list_head dirty_cowonly_roots
;
1125 struct btrfs_fs_devices
*fs_devices
;
1128 * the space_info list is almost entirely read only. It only changes
1129 * when we add a new raid type to the FS, and that happens
1130 * very rarely. RCU is used to protect it.
1132 struct list_head space_info
;
1134 struct reloc_control
*reloc_ctl
;
1136 spinlock_t delalloc_lock
;
1139 /* data_alloc_cluster is only used in ssd mode */
1140 struct btrfs_free_cluster data_alloc_cluster
;
1142 /* all metadata allocations go through this cluster */
1143 struct btrfs_free_cluster meta_alloc_cluster
;
1145 /* auto defrag inodes go here */
1146 spinlock_t defrag_inodes_lock
;
1147 struct rb_root defrag_inodes
;
1148 atomic_t defrag_running
;
1150 spinlock_t ref_cache_lock
;
1151 u64 total_ref_cache_size
;
1154 * these three are in extended format (availability of single
1155 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1156 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1158 u64 avail_data_alloc_bits
;
1159 u64 avail_metadata_alloc_bits
;
1160 u64 avail_system_alloc_bits
;
1162 unsigned data_chunk_allocations
;
1163 unsigned metadata_ratio
;
1167 /* private scrub information */
1168 struct mutex scrub_lock
;
1169 atomic_t scrubs_running
;
1170 atomic_t scrub_pause_req
;
1171 atomic_t scrubs_paused
;
1172 atomic_t scrub_cancel_req
;
1173 wait_queue_head_t scrub_pause_wait
;
1174 struct rw_semaphore scrub_super_lock
;
1175 int scrub_workers_refcnt
;
1176 struct btrfs_workers scrub_workers
;
1178 /* filesystem state */
1181 struct btrfs_delayed_root
*delayed_root
;
1183 /* readahead tree */
1184 spinlock_t reada_lock
;
1185 struct radix_tree_root reada_tree
;
1187 /* next backup root to be overwritten */
1188 int backup_root_index
;
1192 * in ram representation of the tree. extent_root is used for all allocations
1193 * and for the extent tree extent_root root.
1196 struct extent_buffer
*node
;
1198 struct extent_buffer
*commit_root
;
1199 struct btrfs_root
*log_root
;
1200 struct btrfs_root
*reloc_root
;
1202 struct btrfs_root_item root_item
;
1203 struct btrfs_key root_key
;
1204 struct btrfs_fs_info
*fs_info
;
1205 struct extent_io_tree dirty_log_pages
;
1207 struct kobject root_kobj
;
1208 struct completion kobj_unregister
;
1209 struct mutex objectid_mutex
;
1211 spinlock_t accounting_lock
;
1212 struct btrfs_block_rsv
*block_rsv
;
1214 /* free ino cache stuff */
1215 struct mutex fs_commit_mutex
;
1216 struct btrfs_free_space_ctl
*free_ino_ctl
;
1217 enum btrfs_caching_type cached
;
1218 spinlock_t cache_lock
;
1219 wait_queue_head_t cache_wait
;
1220 struct btrfs_free_space_ctl
*free_ino_pinned
;
1222 struct inode
*cache_inode
;
1224 struct mutex log_mutex
;
1225 wait_queue_head_t log_writer_wait
;
1226 wait_queue_head_t log_commit_wait
[2];
1227 atomic_t log_writers
;
1228 atomic_t log_commit
[2];
1229 unsigned long log_transid
;
1230 unsigned long last_log_commit
;
1231 unsigned long log_batch
;
1232 pid_t log_start_pid
;
1233 bool log_multiple_pids
;
1238 /* data allocations are done in sectorsize units */
1241 /* node allocations are done in nodesize units */
1244 /* leaf allocations are done in leafsize units */
1251 u64 highest_objectid
;
1253 /* btrfs_record_root_in_trans is a multi-step process,
1254 * and it can race with the balancing code. But the
1255 * race is very small, and only the first time the root
1256 * is added to each transaction. So in_trans_setup
1257 * is used to tell us when more checks are required
1259 unsigned long in_trans_setup
;
1264 u64 defrag_trans_start
;
1265 struct btrfs_key defrag_progress
;
1266 struct btrfs_key defrag_max
;
1270 /* the dirty list is only used by non-reference counted roots */
1271 struct list_head dirty_list
;
1273 struct list_head root_list
;
1275 spinlock_t orphan_lock
;
1276 struct list_head orphan_list
;
1277 struct btrfs_block_rsv
*orphan_block_rsv
;
1278 int orphan_item_inserted
;
1279 int orphan_cleanup_state
;
1281 spinlock_t inode_lock
;
1282 /* red-black tree that keeps track of in-memory inodes */
1283 struct rb_root inode_tree
;
1286 * radix tree that keeps track of delayed nodes of every inode,
1287 * protected by inode_lock
1289 struct radix_tree_root delayed_nodes_tree
;
1291 * right now this just gets used so that a root has its own devid
1292 * for stat. It may be used for more later
1299 struct btrfs_ioctl_defrag_range_args
{
1300 /* start of the defrag operation */
1303 /* number of bytes to defrag, use (u64)-1 to say all */
1307 * flags for the operation, which can include turning
1308 * on compression for this one defrag
1313 * any extent bigger than this will be considered
1314 * already defragged. Use 0 to take the kernel default
1315 * Use 1 to say every single extent must be rewritten
1317 __u32 extent_thresh
;
1320 * which compression method to use if turning on compression
1321 * for this defrag operation. If unspecified, zlib will
1324 __u32 compress_type
;
1326 /* spare for later */
1332 * inode items have the data typically returned from stat and store other
1333 * info about object characteristics. There is one for every file and dir in
1336 #define BTRFS_INODE_ITEM_KEY 1
1337 #define BTRFS_INODE_REF_KEY 12
1338 #define BTRFS_XATTR_ITEM_KEY 24
1339 #define BTRFS_ORPHAN_ITEM_KEY 48
1340 /* reserve 2-15 close to the inode for later flexibility */
1343 * dir items are the name -> inode pointers in a directory. There is one
1344 * for every name in a directory.
1346 #define BTRFS_DIR_LOG_ITEM_KEY 60
1347 #define BTRFS_DIR_LOG_INDEX_KEY 72
1348 #define BTRFS_DIR_ITEM_KEY 84
1349 #define BTRFS_DIR_INDEX_KEY 96
1351 * extent data is for file data
1353 #define BTRFS_EXTENT_DATA_KEY 108
1356 * extent csums are stored in a separate tree and hold csums for
1357 * an entire extent on disk.
1359 #define BTRFS_EXTENT_CSUM_KEY 128
1362 * root items point to tree roots. They are typically in the root
1363 * tree used by the super block to find all the other trees
1365 #define BTRFS_ROOT_ITEM_KEY 132
1368 * root backrefs tie subvols and snapshots to the directory entries that
1371 #define BTRFS_ROOT_BACKREF_KEY 144
1374 * root refs make a fast index for listing all of the snapshots and
1375 * subvolumes referenced by a given root. They point directly to the
1376 * directory item in the root that references the subvol
1378 #define BTRFS_ROOT_REF_KEY 156
1381 * extent items are in the extent map tree. These record which blocks
1382 * are used, and how many references there are to each block
1384 #define BTRFS_EXTENT_ITEM_KEY 168
1386 #define BTRFS_TREE_BLOCK_REF_KEY 176
1388 #define BTRFS_EXTENT_DATA_REF_KEY 178
1390 #define BTRFS_EXTENT_REF_V0_KEY 180
1392 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1394 #define BTRFS_SHARED_DATA_REF_KEY 184
1397 * block groups give us hints into the extent allocation trees. Which
1398 * blocks are free etc etc
1400 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1402 #define BTRFS_DEV_EXTENT_KEY 204
1403 #define BTRFS_DEV_ITEM_KEY 216
1404 #define BTRFS_CHUNK_ITEM_KEY 228
1407 * string items are for debugging. They just store a short string of
1410 #define BTRFS_STRING_ITEM_KEY 253
1413 * Flags for mount options.
1415 * Note: don't forget to add new options to btrfs_show_options()
1417 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1418 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1419 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1420 #define BTRFS_MOUNT_SSD (1 << 3)
1421 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1422 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1423 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1424 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1425 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1426 #define BTRFS_MOUNT_NOSSD (1 << 9)
1427 #define BTRFS_MOUNT_DISCARD (1 << 10)
1428 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1429 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1430 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1431 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1432 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1433 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1434 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1435 #define BTRFS_MOUNT_RECOVERY (1 << 18)
1437 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1438 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1439 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1444 #define BTRFS_INODE_NODATASUM (1 << 0)
1445 #define BTRFS_INODE_NODATACOW (1 << 1)
1446 #define BTRFS_INODE_READONLY (1 << 2)
1447 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1448 #define BTRFS_INODE_PREALLOC (1 << 4)
1449 #define BTRFS_INODE_SYNC (1 << 5)
1450 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1451 #define BTRFS_INODE_APPEND (1 << 7)
1452 #define BTRFS_INODE_NODUMP (1 << 8)
1453 #define BTRFS_INODE_NOATIME (1 << 9)
1454 #define BTRFS_INODE_DIRSYNC (1 << 10)
1455 #define BTRFS_INODE_COMPRESS (1 << 11)
1457 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1459 /* some macros to generate set/get funcs for the struct fields. This
1460 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1463 #define le8_to_cpu(v) (v)
1464 #define cpu_to_le8(v) (v)
1467 #define read_eb_member(eb, ptr, type, member, result) ( \
1468 read_extent_buffer(eb, (char *)(result), \
1469 ((unsigned long)(ptr)) + \
1470 offsetof(type, member), \
1471 sizeof(((type *)0)->member)))
1473 #define write_eb_member(eb, ptr, type, member, result) ( \
1474 write_extent_buffer(eb, (char *)(result), \
1475 ((unsigned long)(ptr)) + \
1476 offsetof(type, member), \
1477 sizeof(((type *)0)->member)))
1479 #ifndef BTRFS_SETGET_FUNCS
1480 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1481 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1482 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1485 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1486 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1488 type *p = page_address(eb->first_page); \
1489 u##bits res = le##bits##_to_cpu(p->member); \
1492 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1495 type *p = page_address(eb->first_page); \
1496 p->member = cpu_to_le##bits(val); \
1499 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1500 static inline u##bits btrfs_##name(type *s) \
1502 return le##bits##_to_cpu(s->member); \
1504 static inline void btrfs_set_##name(type *s, u##bits val) \
1506 s->member = cpu_to_le##bits(val); \
1509 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1510 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1511 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1512 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1513 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1514 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1516 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1517 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1518 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1519 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1520 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1521 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1523 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1524 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1526 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1528 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1530 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1532 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1534 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1535 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1537 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1539 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1541 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1544 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1546 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1549 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1551 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1554 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1555 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1556 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1557 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1558 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1559 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1560 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1561 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1562 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1563 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1564 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1566 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1568 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1571 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1572 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1573 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1575 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1577 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1579 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1581 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1582 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1584 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1586 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1587 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1589 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1592 unsigned long offset
= (unsigned long)c
;
1593 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1594 offset
+= nr
* sizeof(struct btrfs_stripe
);
1595 return (struct btrfs_stripe
*)offset
;
1598 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1600 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1603 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1604 struct btrfs_chunk
*c
, int nr
)
1606 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1609 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1610 struct btrfs_chunk
*c
, int nr
)
1612 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1615 /* struct btrfs_block_group_item */
1616 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1618 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1620 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1621 struct btrfs_block_group_item
, chunk_objectid
, 64);
1623 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1624 struct btrfs_block_group_item
, chunk_objectid
, 64);
1625 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1626 struct btrfs_block_group_item
, flags
, 64);
1627 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1628 struct btrfs_block_group_item
, flags
, 64);
1630 /* struct btrfs_inode_ref */
1631 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1632 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1634 /* struct btrfs_inode_item */
1635 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1636 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1637 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1638 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1639 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1640 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1641 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1642 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1643 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1644 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1645 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1646 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1648 static inline struct btrfs_timespec
*
1649 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1651 unsigned long ptr
= (unsigned long)inode_item
;
1652 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1653 return (struct btrfs_timespec
*)ptr
;
1656 static inline struct btrfs_timespec
*
1657 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1659 unsigned long ptr
= (unsigned long)inode_item
;
1660 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1661 return (struct btrfs_timespec
*)ptr
;
1664 static inline struct btrfs_timespec
*
1665 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1667 unsigned long ptr
= (unsigned long)inode_item
;
1668 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1669 return (struct btrfs_timespec
*)ptr
;
1672 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1673 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1675 /* struct btrfs_dev_extent */
1676 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1678 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1679 chunk_objectid
, 64);
1680 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1682 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1684 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1686 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1687 return (u8
*)((unsigned long)dev
+ ptr
);
1690 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1691 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1693 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1695 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1698 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1700 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1701 struct btrfs_tree_block_info
*item
,
1702 struct btrfs_disk_key
*key
)
1704 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1707 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1708 struct btrfs_tree_block_info
*item
,
1709 struct btrfs_disk_key
*key
)
1711 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1714 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1716 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1718 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1720 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1723 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1726 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1728 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1731 static inline u32
btrfs_extent_inline_ref_size(int type
)
1733 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1734 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1735 return sizeof(struct btrfs_extent_inline_ref
);
1736 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1737 return sizeof(struct btrfs_shared_data_ref
) +
1738 sizeof(struct btrfs_extent_inline_ref
);
1739 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1740 return sizeof(struct btrfs_extent_data_ref
) +
1741 offsetof(struct btrfs_extent_inline_ref
, offset
);
1746 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1747 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1749 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1750 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1752 /* struct btrfs_node */
1753 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1754 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1756 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1759 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1760 sizeof(struct btrfs_key_ptr
) * nr
;
1761 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1764 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1768 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1769 sizeof(struct btrfs_key_ptr
) * nr
;
1770 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1773 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1776 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1777 sizeof(struct btrfs_key_ptr
) * nr
;
1778 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1781 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1785 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1786 sizeof(struct btrfs_key_ptr
) * nr
;
1787 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1790 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1792 return offsetof(struct btrfs_node
, ptrs
) +
1793 sizeof(struct btrfs_key_ptr
) * nr
;
1796 void btrfs_node_key(struct extent_buffer
*eb
,
1797 struct btrfs_disk_key
*disk_key
, int nr
);
1799 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1800 struct btrfs_disk_key
*disk_key
, int nr
)
1803 ptr
= btrfs_node_key_ptr_offset(nr
);
1804 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1805 struct btrfs_key_ptr
, key
, disk_key
);
1808 /* struct btrfs_item */
1809 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1810 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1812 static inline unsigned long btrfs_item_nr_offset(int nr
)
1814 return offsetof(struct btrfs_leaf
, items
) +
1815 sizeof(struct btrfs_item
) * nr
;
1818 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1821 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1824 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1825 struct btrfs_item
*item
)
1827 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1830 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1832 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1835 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1837 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1840 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1842 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1845 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1846 struct btrfs_disk_key
*disk_key
, int nr
)
1848 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1849 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1852 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1853 struct btrfs_disk_key
*disk_key
, int nr
)
1855 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1856 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1859 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1862 * struct btrfs_root_ref
1864 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1865 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1866 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1868 /* struct btrfs_dir_item */
1869 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1870 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1871 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1872 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1874 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1875 struct btrfs_dir_item
*item
,
1876 struct btrfs_disk_key
*key
)
1878 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1881 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1882 struct btrfs_dir_item
*item
,
1883 struct btrfs_disk_key
*key
)
1885 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1888 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1890 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1892 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1895 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1896 struct btrfs_free_space_header
*h
,
1897 struct btrfs_disk_key
*key
)
1899 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1902 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1903 struct btrfs_free_space_header
*h
,
1904 struct btrfs_disk_key
*key
)
1906 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1909 /* struct btrfs_disk_key */
1910 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1912 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1913 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1915 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1916 struct btrfs_disk_key
*disk
)
1918 cpu
->offset
= le64_to_cpu(disk
->offset
);
1919 cpu
->type
= disk
->type
;
1920 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1923 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1924 struct btrfs_key
*cpu
)
1926 disk
->offset
= cpu_to_le64(cpu
->offset
);
1927 disk
->type
= cpu
->type
;
1928 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1931 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1932 struct btrfs_key
*key
, int nr
)
1934 struct btrfs_disk_key disk_key
;
1935 btrfs_node_key(eb
, &disk_key
, nr
);
1936 btrfs_disk_key_to_cpu(key
, &disk_key
);
1939 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1940 struct btrfs_key
*key
, int nr
)
1942 struct btrfs_disk_key disk_key
;
1943 btrfs_item_key(eb
, &disk_key
, nr
);
1944 btrfs_disk_key_to_cpu(key
, &disk_key
);
1947 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1948 struct btrfs_dir_item
*item
,
1949 struct btrfs_key
*key
)
1951 struct btrfs_disk_key disk_key
;
1952 btrfs_dir_item_key(eb
, item
, &disk_key
);
1953 btrfs_disk_key_to_cpu(key
, &disk_key
);
1957 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1962 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1967 /* struct btrfs_header */
1968 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1969 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1971 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1972 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1973 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1974 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1976 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1978 return (btrfs_header_flags(eb
) & flag
) == flag
;
1981 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1983 u64 flags
= btrfs_header_flags(eb
);
1984 btrfs_set_header_flags(eb
, flags
| flag
);
1985 return (flags
& flag
) == flag
;
1988 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1990 u64 flags
= btrfs_header_flags(eb
);
1991 btrfs_set_header_flags(eb
, flags
& ~flag
);
1992 return (flags
& flag
) == flag
;
1995 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1997 u64 flags
= btrfs_header_flags(eb
);
1998 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2001 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2004 u64 flags
= btrfs_header_flags(eb
);
2005 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2006 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2007 btrfs_set_header_flags(eb
, flags
);
2010 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
2012 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
2016 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2018 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
2022 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2024 return btrfs_header_level(eb
) == 0;
2027 /* struct btrfs_root_item */
2028 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2030 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2031 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2032 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2034 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2036 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2037 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2038 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2039 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2040 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2041 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2042 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2043 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2046 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2048 return root
->root_item
.flags
& BTRFS_ROOT_SUBVOL_RDONLY
;
2051 /* struct btrfs_root_backup */
2052 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2054 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2056 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2057 tree_root_level
, 8);
2059 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2061 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2062 chunk_root_gen
, 64);
2063 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2064 chunk_root_level
, 8);
2066 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2068 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2069 extent_root_gen
, 64);
2070 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2071 extent_root_level
, 8);
2073 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2075 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2077 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2080 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2082 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2084 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2087 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2089 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2091 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2092 csum_root_level
, 8);
2093 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2095 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2097 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2100 /* struct btrfs_super_block */
2102 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2103 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2104 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2106 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2107 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2108 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2109 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2110 struct btrfs_super_block
, chunk_root_generation
, 64);
2111 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2113 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2115 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2116 chunk_root_level
, 8);
2117 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2119 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2120 log_root_transid
, 64);
2121 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2123 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2125 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2127 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2129 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2131 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2133 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2135 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2136 root_dir_objectid
, 64);
2137 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2139 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2141 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2142 compat_ro_flags
, 64);
2143 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2144 incompat_flags
, 64);
2145 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2147 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2148 cache_generation
, 64);
2150 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2152 int t
= btrfs_super_csum_type(s
);
2153 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2154 return btrfs_csum_sizes
[t
];
2157 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2159 return offsetof(struct btrfs_leaf
, items
);
2162 /* struct btrfs_file_extent_item */
2163 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2165 static inline unsigned long
2166 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2168 unsigned long offset
= (unsigned long)e
;
2169 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2173 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2175 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2178 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2180 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2182 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2183 disk_num_bytes
, 64);
2184 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2186 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2188 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2190 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2192 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2194 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2195 other_encoding
, 16);
2197 /* this returns the number of file bytes represented by the inline item.
2198 * If an item is compressed, this is the uncompressed size
2200 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2201 struct btrfs_file_extent_item
*e
)
2203 return btrfs_file_extent_ram_bytes(eb
, e
);
2207 * this returns the number of bytes used by the item on disk, minus the
2208 * size of any extent headers. If a file is compressed on disk, this is
2209 * the compressed size
2211 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2212 struct btrfs_item
*e
)
2214 unsigned long offset
;
2215 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2216 return btrfs_item_size(eb
, e
) - offset
;
2219 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
2221 return sb
->s_fs_info
;
2224 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
2227 return root
->leafsize
;
2228 return root
->nodesize
;
2231 /* helper function to cast into the data area of the leaf. */
2232 #define btrfs_item_ptr(leaf, slot, type) \
2233 ((type *)(btrfs_leaf_data(leaf) + \
2234 btrfs_item_offset_nr(leaf, slot)))
2236 #define btrfs_item_ptr_offset(leaf, slot) \
2237 ((unsigned long)(btrfs_leaf_data(leaf) + \
2238 btrfs_item_offset_nr(leaf, slot)))
2240 static inline struct dentry
*fdentry(struct file
*file
)
2242 return file
->f_path
.dentry
;
2245 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2247 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2248 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2251 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2253 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
2257 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2260 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2265 * Doing a truncate won't result in new nodes or leaves, just what we need for
2268 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2271 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
2275 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2276 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2277 struct btrfs_root
*root
, unsigned long count
);
2278 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2279 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2280 struct btrfs_root
*root
, u64 bytenr
,
2281 u64 num_bytes
, u64
*refs
, u64
*flags
);
2282 int btrfs_pin_extent(struct btrfs_root
*root
,
2283 u64 bytenr
, u64 num
, int reserved
);
2284 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle
*trans
,
2285 struct btrfs_root
*root
,
2286 u64 bytenr
, u64 num_bytes
);
2287 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2288 struct btrfs_root
*root
,
2289 u64 objectid
, u64 offset
, u64 bytenr
);
2290 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2291 struct btrfs_fs_info
*info
,
2293 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2294 u64
btrfs_find_block_group(struct btrfs_root
*root
,
2295 u64 search_start
, u64 search_hint
, int owner
);
2296 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2297 struct btrfs_root
*root
, u32 blocksize
,
2298 u64 parent
, u64 root_objectid
,
2299 struct btrfs_disk_key
*key
, int level
,
2300 u64 hint
, u64 empty_size
);
2301 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2302 struct btrfs_root
*root
,
2303 struct extent_buffer
*buf
,
2304 u64 parent
, int last_ref
);
2305 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
2306 struct btrfs_root
*root
,
2307 u64 bytenr
, u32 blocksize
,
2309 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2310 struct btrfs_root
*root
,
2311 u64 root_objectid
, u64 owner
,
2312 u64 offset
, struct btrfs_key
*ins
);
2313 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2314 struct btrfs_root
*root
,
2315 u64 root_objectid
, u64 owner
, u64 offset
,
2316 struct btrfs_key
*ins
);
2317 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2318 struct btrfs_root
*root
,
2319 u64 num_bytes
, u64 min_alloc_size
,
2320 u64 empty_size
, u64 hint_byte
,
2321 u64 search_end
, struct btrfs_key
*ins
,
2323 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2324 struct extent_buffer
*buf
, int full_backref
);
2325 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2326 struct extent_buffer
*buf
, int full_backref
);
2327 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2328 struct btrfs_root
*root
,
2329 u64 bytenr
, u64 num_bytes
, u64 flags
,
2331 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2332 struct btrfs_root
*root
,
2333 u64 bytenr
, u64 num_bytes
, u64 parent
,
2334 u64 root_objectid
, u64 owner
, u64 offset
);
2336 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2337 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
2338 u64 start
, u64 len
);
2339 int btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2340 struct btrfs_root
*root
);
2341 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2342 struct btrfs_root
*root
);
2343 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2344 struct btrfs_root
*root
,
2345 u64 bytenr
, u64 num_bytes
, u64 parent
,
2346 u64 root_objectid
, u64 owner
, u64 offset
);
2348 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2349 struct btrfs_root
*root
);
2350 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2351 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2352 int btrfs_read_block_groups(struct btrfs_root
*root
);
2353 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2354 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2355 struct btrfs_root
*root
, u64 bytes_used
,
2356 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2358 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2359 struct btrfs_root
*root
, u64 group_start
);
2360 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2361 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2362 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2363 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2364 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
2365 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
2366 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2367 struct btrfs_root
*root
);
2368 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2369 struct inode
*inode
);
2370 void btrfs_orphan_release_metadata(struct inode
*inode
);
2371 int btrfs_snap_reserve_metadata(struct btrfs_trans_handle
*trans
,
2372 struct btrfs_pending_snapshot
*pending
);
2373 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2374 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2375 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
2376 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
2377 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
);
2378 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
);
2379 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2380 struct btrfs_block_rsv
*rsv
);
2381 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2382 struct btrfs_block_rsv
*block_rsv
,
2384 int btrfs_block_rsv_add_noflush(struct btrfs_root
*root
,
2385 struct btrfs_block_rsv
*block_rsv
,
2387 int btrfs_block_rsv_check(struct btrfs_root
*root
,
2388 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2389 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2390 struct btrfs_block_rsv
*block_rsv
,
2392 int btrfs_block_rsv_refill_noflush(struct btrfs_root
*root
,
2393 struct btrfs_block_rsv
*block_rsv
,
2395 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2396 struct btrfs_block_rsv
*dst_rsv
,
2398 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2399 struct btrfs_block_rsv
*block_rsv
,
2401 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
2402 struct btrfs_block_group_cache
*cache
);
2403 int btrfs_set_block_group_rw(struct btrfs_root
*root
,
2404 struct btrfs_block_group_cache
*cache
);
2405 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2406 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2407 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2408 u64 start
, u64 end
);
2409 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2410 u64 num_bytes
, u64
*actual_bytes
);
2411 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2412 struct btrfs_root
*root
, u64 type
);
2413 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
2415 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2417 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2418 int level
, int *slot
);
2419 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2420 int btrfs_previous_item(struct btrfs_root
*root
,
2421 struct btrfs_path
*path
, u64 min_objectid
,
2423 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2424 struct btrfs_root
*root
, struct btrfs_path
*path
,
2425 struct btrfs_key
*new_key
);
2426 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2427 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2428 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2429 struct btrfs_key
*key
, int lowest_level
,
2430 int cache_only
, u64 min_trans
);
2431 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2432 struct btrfs_key
*max_key
,
2433 struct btrfs_path
*path
, int cache_only
,
2435 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2436 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2437 struct extent_buffer
*parent
, int parent_slot
,
2438 struct extent_buffer
**cow_ret
);
2439 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2440 struct btrfs_root
*root
,
2441 struct extent_buffer
*buf
,
2442 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2443 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2444 struct extent_buffer
*buf
);
2445 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2446 *root
, struct btrfs_path
*path
, u32 data_size
);
2447 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2448 struct btrfs_root
*root
,
2449 struct btrfs_path
*path
,
2450 u32 new_size
, int from_end
);
2451 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2452 struct btrfs_root
*root
,
2453 struct btrfs_path
*path
,
2454 struct btrfs_key
*new_key
,
2455 unsigned long split_offset
);
2456 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2457 struct btrfs_root
*root
,
2458 struct btrfs_path
*path
,
2459 struct btrfs_key
*new_key
);
2460 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2461 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2463 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2464 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2465 int start_slot
, int cache_only
, u64
*last_ret
,
2466 struct btrfs_key
*progress
);
2467 void btrfs_release_path(struct btrfs_path
*p
);
2468 struct btrfs_path
*btrfs_alloc_path(void);
2469 void btrfs_free_path(struct btrfs_path
*p
);
2470 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2471 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2472 struct extent_buffer
*held
, int held_rw
);
2473 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2475 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2476 struct btrfs_path
*path
, int slot
, int nr
);
2477 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2478 struct btrfs_root
*root
,
2479 struct btrfs_path
*path
)
2481 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2484 int setup_items_for_insert(struct btrfs_trans_handle
*trans
,
2485 struct btrfs_root
*root
, struct btrfs_path
*path
,
2486 struct btrfs_key
*cpu_key
, u32
*data_size
,
2487 u32 total_data
, u32 total_size
, int nr
);
2488 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2489 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2490 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2491 struct btrfs_root
*root
,
2492 struct btrfs_path
*path
,
2493 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2495 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2496 struct btrfs_root
*root
,
2497 struct btrfs_path
*path
,
2498 struct btrfs_key
*key
,
2501 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2504 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2505 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2506 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2507 void btrfs_drop_snapshot(struct btrfs_root
*root
,
2508 struct btrfs_block_rsv
*block_rsv
, int update_ref
);
2509 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2510 struct btrfs_root
*root
,
2511 struct extent_buffer
*node
,
2512 struct extent_buffer
*parent
);
2513 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2516 * Get synced with close_ctree()
2519 return fs_info
->closing
;
2521 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
2523 kfree(fs_info
->delayed_root
);
2524 kfree(fs_info
->extent_root
);
2525 kfree(fs_info
->tree_root
);
2526 kfree(fs_info
->chunk_root
);
2527 kfree(fs_info
->dev_root
);
2528 kfree(fs_info
->csum_root
);
2529 kfree(fs_info
->super_copy
);
2530 kfree(fs_info
->super_for_commit
);
2535 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2536 struct btrfs_path
*path
,
2537 u64 root_id
, u64 ref_id
);
2538 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2539 struct btrfs_root
*tree_root
,
2540 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2541 const char *name
, int name_len
);
2542 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2543 struct btrfs_root
*tree_root
,
2544 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2545 const char *name
, int name_len
);
2546 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2547 struct btrfs_key
*key
);
2548 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2549 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2551 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2552 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2554 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2555 btrfs_root_item
*item
, struct btrfs_key
*key
);
2556 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2557 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2558 void btrfs_set_root_node(struct btrfs_root_item
*item
,
2559 struct extent_buffer
*node
);
2560 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2563 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2564 struct btrfs_root
*root
, const char *name
,
2565 int name_len
, struct inode
*dir
,
2566 struct btrfs_key
*location
, u8 type
, u64 index
);
2567 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2568 struct btrfs_root
*root
,
2569 struct btrfs_path
*path
, u64 dir
,
2570 const char *name
, int name_len
,
2572 struct btrfs_dir_item
*
2573 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2574 struct btrfs_root
*root
,
2575 struct btrfs_path
*path
, u64 dir
,
2576 u64 objectid
, const char *name
, int name_len
,
2578 struct btrfs_dir_item
*
2579 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2580 struct btrfs_path
*path
, u64 dirid
,
2581 const char *name
, int name_len
);
2582 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2583 struct btrfs_path
*path
,
2584 const char *name
, int name_len
);
2585 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2586 struct btrfs_root
*root
,
2587 struct btrfs_path
*path
,
2588 struct btrfs_dir_item
*di
);
2589 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2590 struct btrfs_root
*root
,
2591 struct btrfs_path
*path
, u64 objectid
,
2592 const char *name
, u16 name_len
,
2593 const void *data
, u16 data_len
);
2594 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2595 struct btrfs_root
*root
,
2596 struct btrfs_path
*path
, u64 dir
,
2597 const char *name
, u16 name_len
,
2599 int verify_dir_item(struct btrfs_root
*root
,
2600 struct extent_buffer
*leaf
,
2601 struct btrfs_dir_item
*dir_item
);
2604 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2605 struct btrfs_root
*root
, u64 offset
);
2606 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2607 struct btrfs_root
*root
, u64 offset
);
2608 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2611 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2612 struct btrfs_root
*root
,
2613 const char *name
, int name_len
,
2614 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2615 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2616 struct btrfs_root
*root
,
2617 const char *name
, int name_len
,
2618 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2619 struct btrfs_inode_ref
*
2620 btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2621 struct btrfs_root
*root
,
2622 struct btrfs_path
*path
,
2623 const char *name
, int name_len
,
2624 u64 inode_objectid
, u64 ref_objectid
, int mod
);
2625 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2626 struct btrfs_root
*root
,
2627 struct btrfs_path
*path
, u64 objectid
);
2628 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2629 *root
, struct btrfs_path
*path
,
2630 struct btrfs_key
*location
, int mod
);
2633 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2634 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2635 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2636 struct bio
*bio
, u32
*dst
);
2637 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
2638 struct bio
*bio
, u64 logical_offset
, u32
*dst
);
2639 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2640 struct btrfs_root
*root
,
2641 u64 objectid
, u64 pos
,
2642 u64 disk_offset
, u64 disk_num_bytes
,
2643 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2644 u8 compression
, u8 encryption
, u16 other_encoding
);
2645 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2646 struct btrfs_root
*root
,
2647 struct btrfs_path
*path
, u64 objectid
,
2648 u64 bytenr
, int mod
);
2649 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2650 struct btrfs_root
*root
,
2651 struct btrfs_ordered_sum
*sums
);
2652 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2653 struct bio
*bio
, u64 file_start
, int contig
);
2654 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2655 struct btrfs_root
*root
,
2656 struct btrfs_path
*path
,
2657 u64 bytenr
, int cow
);
2658 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2659 struct btrfs_root
*root
, struct btrfs_path
*path
,
2661 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
2662 struct list_head
*list
, int search_commit
);
2664 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
2665 size_t pg_offset
, u64 start
, u64 len
,
2668 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2669 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2670 #define ClearPageChecked ClearPageFsMisc
2671 #define SetPageChecked SetPageFsMisc
2672 #define PageChecked PageFsMisc
2675 /* This forces readahead on a given range of bytes in an inode */
2676 static inline void btrfs_force_ra(struct address_space
*mapping
,
2677 struct file_ra_state
*ra
, struct file
*file
,
2678 pgoff_t offset
, unsigned long req_size
)
2680 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
2683 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2684 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2685 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2686 struct btrfs_root
*root
,
2687 struct inode
*dir
, struct inode
*inode
,
2688 const char *name
, int name_len
);
2689 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2690 struct inode
*parent_inode
, struct inode
*inode
,
2691 const char *name
, int name_len
, int add_backref
, u64 index
);
2692 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2693 struct btrfs_root
*root
,
2694 struct inode
*dir
, u64 objectid
,
2695 const char *name
, int name_len
);
2696 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2697 struct btrfs_root
*root
,
2698 struct inode
*inode
, u64 new_size
,
2701 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2702 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
2703 struct extent_state
**cached_state
);
2704 int btrfs_writepages(struct address_space
*mapping
,
2705 struct writeback_control
*wbc
);
2706 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2707 struct btrfs_root
*new_root
, u64 new_dirid
);
2708 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2709 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2711 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2712 int btrfs_readpage(struct file
*file
, struct page
*page
);
2713 void btrfs_evict_inode(struct inode
*inode
);
2714 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
2715 int btrfs_dirty_inode(struct inode
*inode
);
2716 int btrfs_update_time(struct file
*file
);
2717 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2718 void btrfs_destroy_inode(struct inode
*inode
);
2719 int btrfs_drop_inode(struct inode
*inode
);
2720 int btrfs_init_cachep(void);
2721 void btrfs_destroy_cachep(void);
2722 long btrfs_ioctl_trans_end(struct file
*file
);
2723 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2724 struct btrfs_root
*root
, int *was_new
);
2725 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2726 size_t pg_offset
, u64 start
, u64 end
,
2728 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2729 struct btrfs_root
*root
,
2730 struct inode
*inode
);
2731 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2732 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2733 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
2734 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
2735 struct btrfs_root
*root
);
2736 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
2737 int btrfs_invalidate_inodes(struct btrfs_root
*root
);
2738 void btrfs_add_delayed_iput(struct inode
*inode
);
2739 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
2740 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
2741 u64 start
, u64 num_bytes
, u64 min_size
,
2742 loff_t actual_len
, u64
*alloc_hint
);
2743 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
2744 struct btrfs_trans_handle
*trans
, int mode
,
2745 u64 start
, u64 num_bytes
, u64 min_size
,
2746 loff_t actual_len
, u64
*alloc_hint
);
2747 extern const struct dentry_operations btrfs_dentry_operations
;
2750 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2751 void btrfs_update_iflags(struct inode
*inode
);
2752 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2753 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
2754 struct btrfs_ioctl_defrag_range_args
*range
,
2755 u64 newer_than
, unsigned long max_pages
);
2757 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
2758 struct inode
*inode
);
2759 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
2760 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
2761 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2763 extern const struct file_operations btrfs_file_operations
;
2764 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
2765 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
2766 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2767 struct inode
*inode
, u64 start
, u64 end
);
2768 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2769 void btrfs_drop_pages(struct page
**pages
, size_t num_pages
);
2770 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
2771 struct page
**pages
, size_t num_pages
,
2772 loff_t pos
, size_t write_bytes
,
2773 struct extent_state
**cached
);
2776 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2777 struct btrfs_root
*root
, int cache_only
);
2780 int btrfs_init_sysfs(void);
2781 void btrfs_exit_sysfs(void);
2784 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2787 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2788 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2789 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
2790 unsigned int line
, int errno
);
2792 #define btrfs_std_error(fs_info, errno) \
2795 __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
2799 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2800 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
2801 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2802 struct inode
*inode
, struct inode
*dir
);
2803 int btrfs_acl_chmod(struct inode
*inode
);
2805 #define btrfs_get_acl NULL
2806 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2807 struct inode
*inode
, struct inode
*dir
)
2811 static inline int btrfs_acl_chmod(struct inode
*inode
)
2818 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
2819 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
2820 struct btrfs_root
*root
);
2821 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
2822 struct btrfs_root
*root
);
2823 int btrfs_recover_relocation(struct btrfs_root
*root
);
2824 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
2825 void btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
2826 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2827 struct extent_buffer
*cow
);
2828 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
2829 struct btrfs_pending_snapshot
*pending
,
2830 u64
*bytes_to_reserve
);
2831 void btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
2832 struct btrfs_pending_snapshot
*pending
);
2835 int btrfs_scrub_dev(struct btrfs_root
*root
, u64 devid
, u64 start
, u64 end
,
2836 struct btrfs_scrub_progress
*progress
, int readonly
);
2837 int btrfs_scrub_pause(struct btrfs_root
*root
);
2838 int btrfs_scrub_pause_super(struct btrfs_root
*root
);
2839 int btrfs_scrub_continue(struct btrfs_root
*root
);
2840 int btrfs_scrub_continue_super(struct btrfs_root
*root
);
2841 int btrfs_scrub_cancel(struct btrfs_root
*root
);
2842 int btrfs_scrub_cancel_dev(struct btrfs_root
*root
, struct btrfs_device
*dev
);
2843 int btrfs_scrub_cancel_devid(struct btrfs_root
*root
, u64 devid
);
2844 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
2845 struct btrfs_scrub_progress
*progress
);
2848 struct reada_control
{
2849 struct btrfs_root
*root
; /* tree to prefetch */
2850 struct btrfs_key key_start
;
2851 struct btrfs_key key_end
; /* exclusive */
2854 wait_queue_head_t wait
;
2856 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
2857 struct btrfs_key
*start
, struct btrfs_key
*end
);
2858 int btrfs_reada_wait(void *handle
);
2859 void btrfs_reada_detach(void *handle
);
2860 int btree_readahead_hook(struct btrfs_root
*root
, struct extent_buffer
*eb
,
2861 u64 start
, int err
);