2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
22 #include <linux/version.h>
24 #include <linux/highmem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <asm/kmap_types.h>
30 #include "extent_io.h"
31 #include "extent_map.h"
32 #include "async-thread.h"
34 struct btrfs_trans_handle
;
35 struct btrfs_transaction
;
36 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
37 extern struct kmem_cache
*btrfs_transaction_cachep
;
38 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
39 extern struct kmem_cache
*btrfs_path_cachep
;
40 struct btrfs_ordered_sum
;
42 #define BTRFS_MAGIC "_BHRfS_M"
44 #define BTRFS_MAX_LEVEL 8
46 #define BTRFS_COMPAT_EXTENT_TREE_V0
49 * files bigger than this get some pre-flushing when they are added
50 * to the ordered operations list. That way we limit the total
51 * work done by the commit
53 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
55 /* holds pointers to all of the tree roots */
56 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
58 /* stores information about which extents are in use, and reference counts */
59 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
62 * chunk tree stores translations from logical -> physical block numbering
63 * the super block points to the chunk tree
65 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
68 * stores information about which areas of a given device are in use.
69 * one per device. The tree of tree roots points to the device tree
71 #define BTRFS_DEV_TREE_OBJECTID 4ULL
73 /* one per subvolume, storing files and directories */
74 #define BTRFS_FS_TREE_OBJECTID 5ULL
76 /* directory objectid inside the root tree */
77 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
79 /* holds checksums of all the data extents */
80 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
82 /* orhpan objectid for tracking unlinked/truncated files */
83 #define BTRFS_ORPHAN_OBJECTID -5ULL
85 /* does write ahead logging to speed up fsyncs */
86 #define BTRFS_TREE_LOG_OBJECTID -6ULL
87 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
89 /* for space balancing */
90 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
91 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
94 * extent checksums all have this objectid
95 * this allows them to share the logging tree
98 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
100 /* dummy objectid represents multiple objectids */
101 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
104 * All files have objectids in this range.
106 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
107 #define BTRFS_LAST_FREE_OBJECTID -256ULL
108 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
112 * the device items go into the chunk tree. The key is in the form
113 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
115 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
117 #define BTRFS_BTREE_INODE_OBJECTID 1
119 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
122 * we can actually store much bigger names, but lets not confuse the rest
125 #define BTRFS_NAME_LEN 255
127 /* 32 bytes in various csum fields */
128 #define BTRFS_CSUM_SIZE 32
131 #define BTRFS_CSUM_TYPE_CRC32 0
133 static int btrfs_csum_sizes
[] = { 4, 0 };
135 /* four bytes for CRC32 */
136 #define BTRFS_EMPTY_DIR_SIZE 0
138 #define BTRFS_FT_UNKNOWN 0
139 #define BTRFS_FT_REG_FILE 1
140 #define BTRFS_FT_DIR 2
141 #define BTRFS_FT_CHRDEV 3
142 #define BTRFS_FT_BLKDEV 4
143 #define BTRFS_FT_FIFO 5
144 #define BTRFS_FT_SOCK 6
145 #define BTRFS_FT_SYMLINK 7
146 #define BTRFS_FT_XATTR 8
147 #define BTRFS_FT_MAX 9
150 * The key defines the order in the tree, and so it also defines (optimal)
153 * objectid corresponds to the inode number.
155 * type tells us things about the object, and is a kind of stream selector.
156 * so for a given inode, keys with type of 1 might refer to the inode data,
157 * type of 2 may point to file data in the btree and type == 3 may point to
160 * offset is the starting byte offset for this key in the stream.
162 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
163 * in cpu native order. Otherwise they are identical and their sizes
164 * should be the same (ie both packed)
166 struct btrfs_disk_key
{
170 } __attribute__ ((__packed__
));
176 } __attribute__ ((__packed__
));
178 struct btrfs_mapping_tree
{
179 struct extent_map_tree map_tree
;
182 #define BTRFS_UUID_SIZE 16
183 struct btrfs_dev_item
{
184 /* the internal btrfs device id */
187 /* size of the device */
193 /* optimal io alignment for this device */
196 /* optimal io width for this device */
199 /* minimal io size for this device */
202 /* type and info about this device */
205 /* expected generation for this device */
209 * starting byte of this partition on the device,
210 * to allow for stripe alignment in the future
214 /* grouping information for allocation decisions */
217 /* seek speed 0-100 where 100 is fastest */
220 /* bandwidth 0-100 where 100 is fastest */
223 /* btrfs generated uuid for this device */
224 u8 uuid
[BTRFS_UUID_SIZE
];
226 /* uuid of FS who owns this device */
227 u8 fsid
[BTRFS_UUID_SIZE
];
228 } __attribute__ ((__packed__
));
230 struct btrfs_stripe
{
233 u8 dev_uuid
[BTRFS_UUID_SIZE
];
234 } __attribute__ ((__packed__
));
237 /* size of this chunk in bytes */
240 /* objectid of the root referencing this chunk */
246 /* optimal io alignment for this chunk */
249 /* optimal io width for this chunk */
252 /* minimal io size for this chunk */
255 /* 2^16 stripes is quite a lot, a second limit is the size of a single
260 /* sub stripes only matter for raid10 */
262 struct btrfs_stripe stripe
;
263 /* additional stripes go here */
264 } __attribute__ ((__packed__
));
266 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
268 BUG_ON(num_stripes
== 0);
269 return sizeof(struct btrfs_chunk
) +
270 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
273 #define BTRFS_FSID_SIZE 16
274 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
275 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
276 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
277 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
279 #define BTRFS_BACKREF_REV_MAX 256
280 #define BTRFS_BACKREF_REV_SHIFT 56
281 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
282 BTRFS_BACKREF_REV_SHIFT)
284 #define BTRFS_OLD_BACKREF_REV 0
285 #define BTRFS_MIXED_BACKREF_REV 1
288 * every tree block (leaf or node) starts with this header.
290 struct btrfs_header
{
291 /* these first four must match the super block */
292 u8 csum
[BTRFS_CSUM_SIZE
];
293 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
294 __le64 bytenr
; /* which block this node is supposed to live in */
297 /* allowed to be different from the super from here on down */
298 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
303 } __attribute__ ((__packed__
));
305 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
306 sizeof(struct btrfs_header)) / \
307 sizeof(struct btrfs_key_ptr))
308 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
309 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
310 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
311 sizeof(struct btrfs_item) - \
312 sizeof(struct btrfs_file_extent_item))
313 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
314 sizeof(struct btrfs_item) -\
315 sizeof(struct btrfs_dir_item))
319 * this is a very generous portion of the super block, giving us
320 * room to translate 14 chunks with 3 stripes each.
322 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
323 #define BTRFS_LABEL_SIZE 256
326 * the super block basically lists the main trees of the FS
327 * it currently lacks any block count etc etc
329 struct btrfs_super_block
{
330 u8 csum
[BTRFS_CSUM_SIZE
];
331 /* the first 4 fields must match struct btrfs_header */
332 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
333 __le64 bytenr
; /* this block number */
336 /* allowed to be different from the btrfs_header from here own down */
343 /* this will help find the new super based on the log root */
344 __le64 log_root_transid
;
347 __le64 root_dir_objectid
;
353 __le32 sys_chunk_array_size
;
354 __le64 chunk_root_generation
;
356 __le64 compat_ro_flags
;
357 __le64 incompat_flags
;
362 struct btrfs_dev_item dev_item
;
364 char label
[BTRFS_LABEL_SIZE
];
366 /* future expansion */
368 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
369 } __attribute__ ((__packed__
));
372 * Compat flags that we support. If any incompat flags are set other than the
373 * ones specified below then we will fail to mount
375 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
377 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
378 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
379 #define BTRFS_FEATURE_INCOMPAT_SUPP \
380 BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF
383 * A leaf is full of items. offset and size tell us where to find
384 * the item in the leaf (relative to the start of the data area)
387 struct btrfs_disk_key key
;
390 } __attribute__ ((__packed__
));
393 * leaves have an item area and a data area:
394 * [item0, item1....itemN] [free space] [dataN...data1, data0]
396 * The data is separate from the items to get the keys closer together
400 struct btrfs_header header
;
401 struct btrfs_item items
[];
402 } __attribute__ ((__packed__
));
405 * all non-leaf blocks are nodes, they hold only keys and pointers to
408 struct btrfs_key_ptr
{
409 struct btrfs_disk_key key
;
412 } __attribute__ ((__packed__
));
415 struct btrfs_header header
;
416 struct btrfs_key_ptr ptrs
[];
417 } __attribute__ ((__packed__
));
420 * btrfs_paths remember the path taken from the root down to the leaf.
421 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
422 * to any other levels that are present.
424 * The slots array records the index of the item or block pointer
425 * used while walking the tree.
428 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
429 int slots
[BTRFS_MAX_LEVEL
];
430 /* if there is real range locking, this locks field will change */
431 int locks
[BTRFS_MAX_LEVEL
];
433 /* keep some upper locks as we walk down */
437 * set by btrfs_split_item, tells search_slot to keep all locks
438 * and to force calls to keep space in the nodes
440 unsigned int search_for_split
:1;
441 unsigned int keep_locks
:1;
442 unsigned int skip_locking
:1;
443 unsigned int leave_spinning
:1;
444 unsigned int search_commit_root
:1;
448 * items in the extent btree are used to record the objectid of the
449 * owner of the block and the number of references
452 struct btrfs_extent_item
{
456 } __attribute__ ((__packed__
));
458 struct btrfs_extent_item_v0
{
460 } __attribute__ ((__packed__
));
462 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
463 sizeof(struct btrfs_item))
465 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
466 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
468 /* following flags only apply to tree blocks */
470 /* use full backrefs for extent pointers in the block */
471 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
473 struct btrfs_tree_block_info
{
474 struct btrfs_disk_key key
;
476 } __attribute__ ((__packed__
));
478 struct btrfs_extent_data_ref
{
483 } __attribute__ ((__packed__
));
485 struct btrfs_shared_data_ref
{
487 } __attribute__ ((__packed__
));
489 struct btrfs_extent_inline_ref
{
492 } __attribute__ ((__packed__
));
494 /* old style backrefs item */
495 struct btrfs_extent_ref_v0
{
500 } __attribute__ ((__packed__
));
503 /* dev extents record free space on individual devices. The owner
504 * field points back to the chunk allocation mapping tree that allocated
505 * the extent. The chunk tree uuid field is a way to double check the owner
507 struct btrfs_dev_extent
{
509 __le64 chunk_objectid
;
512 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
513 } __attribute__ ((__packed__
));
515 struct btrfs_inode_ref
{
519 } __attribute__ ((__packed__
));
521 struct btrfs_timespec
{
524 } __attribute__ ((__packed__
));
526 enum btrfs_compression_type
{
527 BTRFS_COMPRESS_NONE
= 0,
528 BTRFS_COMPRESS_ZLIB
= 1,
529 BTRFS_COMPRESS_LAST
= 2,
532 struct btrfs_inode_item
{
533 /* nfs style generation number */
535 /* transid that last touched this inode */
547 /* modification sequence number for NFS */
551 * a little future expansion, for more than this we can
552 * just grow the inode item and version it
555 struct btrfs_timespec atime
;
556 struct btrfs_timespec ctime
;
557 struct btrfs_timespec mtime
;
558 struct btrfs_timespec otime
;
559 } __attribute__ ((__packed__
));
561 struct btrfs_dir_log_item
{
563 } __attribute__ ((__packed__
));
565 struct btrfs_dir_item
{
566 struct btrfs_disk_key location
;
571 } __attribute__ ((__packed__
));
573 struct btrfs_root_item
{
574 struct btrfs_inode_item inode
;
580 __le64 last_snapshot
;
583 struct btrfs_disk_key drop_progress
;
586 } __attribute__ ((__packed__
));
589 * this is used for both forward and backward root refs
591 struct btrfs_root_ref
{
595 } __attribute__ ((__packed__
));
597 #define BTRFS_FILE_EXTENT_INLINE 0
598 #define BTRFS_FILE_EXTENT_REG 1
599 #define BTRFS_FILE_EXTENT_PREALLOC 2
601 struct btrfs_file_extent_item
{
603 * transaction id that created this extent
607 * max number of bytes to hold this extent in ram
608 * when we split a compressed extent we can't know how big
609 * each of the resulting pieces will be. So, this is
610 * an upper limit on the size of the extent in ram instead of
616 * 32 bits for the various ways we might encode the data,
617 * including compression and encryption. If any of these
618 * are set to something a given disk format doesn't understand
619 * it is treated like an incompat flag for reading and writing,
624 __le16 other_encoding
; /* spare for later use */
626 /* are we inline data or a real extent? */
630 * disk space consumed by the extent, checksum blocks are included
634 __le64 disk_num_bytes
;
636 * the logical offset in file blocks (no csums)
637 * this extent record is for. This allows a file extent to point
638 * into the middle of an existing extent on disk, sharing it
639 * between two snapshots (useful if some bytes in the middle of the
640 * extent have changed
644 * the logical number of file blocks (no csums included). This
645 * always reflects the size uncompressed and without encoding.
649 } __attribute__ ((__packed__
));
651 struct btrfs_csum_item
{
653 } __attribute__ ((__packed__
));
655 /* different types of block groups (and chunks) */
656 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
657 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
658 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
659 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
660 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
661 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
662 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
664 struct btrfs_block_group_item
{
666 __le64 chunk_objectid
;
668 } __attribute__ ((__packed__
));
670 struct btrfs_space_info
{
673 u64 total_bytes
; /* total bytes in the space */
674 u64 bytes_used
; /* total bytes used on disk */
675 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
676 transaction finishes */
677 u64 bytes_reserved
; /* total bytes the allocator has reserved for
678 current allocations */
679 u64 bytes_readonly
; /* total bytes that are read only */
680 u64 bytes_super
; /* total bytes reserved for the super blocks */
681 u64 bytes_root
; /* the number of bytes needed to commit a
683 u64 bytes_may_use
; /* number of bytes that may be used for
684 delalloc/allocations */
685 u64 bytes_delalloc
; /* number of bytes currently reserved for
686 delayed allocation */
688 int full
; /* indicates that we cannot allocate any more
689 chunks for this space */
690 int force_alloc
; /* set if we need to force a chunk alloc for
692 int force_delalloc
; /* make people start doing filemap_flush until
693 we're under a threshold */
695 struct list_head list
;
697 /* for controlling how we free up space for allocations */
698 wait_queue_head_t allocate_wait
;
699 wait_queue_head_t flush_wait
;
700 int allocating_chunk
;
703 /* for block groups in our same type */
704 struct list_head block_groups
;
706 struct rw_semaphore groups_sem
;
707 atomic_t caching_threads
;
711 * free clusters are used to claim free space in relatively large chunks,
712 * allowing us to do less seeky writes. They are used for all metadata
713 * allocations and data allocations in ssd mode.
715 struct btrfs_free_cluster
{
717 spinlock_t refill_lock
;
720 /* largest extent in this cluster */
723 /* first extent starting offset */
726 /* if this cluster simply points at a bitmap in the block group */
727 bool points_to_bitmap
;
729 struct btrfs_block_group_cache
*block_group
;
731 * when a cluster is allocated from a block group, we put the
732 * cluster onto a list in the block group so that it can
733 * be freed before the block group is freed.
735 struct list_head block_group_list
;
738 enum btrfs_caching_type
{
740 BTRFS_CACHE_STARTED
= 1,
741 BTRFS_CACHE_FINISHED
= 2,
744 struct btrfs_caching_control
{
745 struct list_head list
;
747 wait_queue_head_t wait
;
748 struct btrfs_block_group_cache
*block_group
;
753 struct btrfs_block_group_cache
{
754 struct btrfs_key key
;
755 struct btrfs_block_group_item item
;
756 struct btrfs_fs_info
*fs_info
;
769 /* cache tracking stuff */
771 struct btrfs_caching_control
*caching_ctl
;
772 u64 last_byte_to_unpin
;
774 struct btrfs_space_info
*space_info
;
776 /* free space cache stuff */
777 spinlock_t tree_lock
;
778 struct rb_root free_space_offset
;
781 /* block group cache stuff */
782 struct rb_node cache_node
;
784 /* for block groups in the same raid type */
785 struct list_head list
;
790 /* List of struct btrfs_free_clusters for this block group.
791 * Today it will only have one thing on it, but that may change
793 struct list_head cluster_list
;
796 struct reloc_control
;
798 struct btrfs_fs_devices
;
799 struct btrfs_fs_info
{
800 u8 fsid
[BTRFS_FSID_SIZE
];
801 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
802 struct btrfs_root
*extent_root
;
803 struct btrfs_root
*tree_root
;
804 struct btrfs_root
*chunk_root
;
805 struct btrfs_root
*dev_root
;
806 struct btrfs_root
*fs_root
;
807 struct btrfs_root
*csum_root
;
809 /* the log root tree is a directory of all the other log roots */
810 struct btrfs_root
*log_root_tree
;
812 spinlock_t fs_roots_radix_lock
;
813 struct radix_tree_root fs_roots_radix
;
815 /* block group cache stuff */
816 spinlock_t block_group_cache_lock
;
817 struct rb_root block_group_cache_tree
;
819 struct extent_io_tree freed_extents
[2];
820 struct extent_io_tree
*pinned_extents
;
822 /* logical->physical extent mapping */
823 struct btrfs_mapping_tree mapping_tree
;
826 u64 last_trans_committed
;
829 * this is updated to the current trans every time a full commit
830 * is required instead of the faster short fsync log commits
832 u64 last_trans_log_full_commit
;
833 u64 open_ioctl_trans
;
834 unsigned long mount_opt
;
838 struct btrfs_transaction
*running_transaction
;
839 wait_queue_head_t transaction_throttle
;
840 wait_queue_head_t transaction_wait
;
841 wait_queue_head_t async_submit_wait
;
843 struct btrfs_super_block super_copy
;
844 struct btrfs_super_block super_for_commit
;
845 struct block_device
*__bdev
;
846 struct super_block
*sb
;
847 struct inode
*btree_inode
;
848 struct backing_dev_info bdi
;
849 struct mutex trans_mutex
;
850 struct mutex tree_log_mutex
;
851 struct mutex transaction_kthread_mutex
;
852 struct mutex cleaner_mutex
;
853 struct mutex chunk_mutex
;
854 struct mutex volume_mutex
;
856 * this protects the ordered operations list only while we are
857 * processing all of the entries on it. This way we make
858 * sure the commit code doesn't find the list temporarily empty
859 * because another function happens to be doing non-waiting preflush
860 * before jumping into the main commit.
862 struct mutex ordered_operations_mutex
;
863 struct rw_semaphore extent_commit_sem
;
865 struct rw_semaphore cleanup_work_sem
;
867 struct rw_semaphore subvol_sem
;
868 struct srcu_struct subvol_srcu
;
870 struct list_head trans_list
;
871 struct list_head hashers
;
872 struct list_head dead_roots
;
873 struct list_head caching_block_groups
;
875 spinlock_t delayed_iput_lock
;
876 struct list_head delayed_iputs
;
878 atomic_t nr_async_submits
;
879 atomic_t async_submit_draining
;
880 atomic_t nr_async_bios
;
881 atomic_t async_delalloc_pages
;
884 * this is used by the balancing code to wait for all the pending
887 spinlock_t ordered_extent_lock
;
890 * all of the data=ordered extents pending writeback
891 * these can span multiple transactions and basically include
892 * every dirty data page that isn't from nodatacow
894 struct list_head ordered_extents
;
897 * all of the inodes that have delalloc bytes. It is possible for
898 * this list to be empty even when there is still dirty data=ordered
899 * extents waiting to finish IO.
901 struct list_head delalloc_inodes
;
904 * special rename and truncate targets that must be on disk before
905 * we're allowed to commit. This is basically the ext3 style
908 struct list_head ordered_operations
;
911 * there is a pool of worker threads for checksumming during writes
912 * and a pool for checksumming after reads. This is because readers
913 * can run with FS locks held, and the writers may be waiting for
914 * those locks. We don't want ordering in the pending list to cause
915 * deadlocks, and so the two are serviced separately.
917 * A third pool does submit_bio to avoid deadlocking with the other
920 struct btrfs_workers generic_worker
;
921 struct btrfs_workers workers
;
922 struct btrfs_workers delalloc_workers
;
923 struct btrfs_workers endio_workers
;
924 struct btrfs_workers endio_meta_workers
;
925 struct btrfs_workers endio_meta_write_workers
;
926 struct btrfs_workers endio_write_workers
;
927 struct btrfs_workers submit_workers
;
928 struct btrfs_workers enospc_workers
;
930 * fixup workers take dirty pages that didn't properly go through
931 * the cow mechanism and make them safe to write. It happens
932 * for the sys_munmap function call path
934 struct btrfs_workers fixup_workers
;
935 struct task_struct
*transaction_kthread
;
936 struct task_struct
*cleaner_kthread
;
937 int thread_pool_size
;
939 struct kobject super_kobj
;
940 struct completion kobj_unregister
;
943 int log_root_recovering
;
947 /* protected by the delalloc lock, used to keep from writing
948 * metadata until there is a nice batch
950 u64 dirty_metadata_bytes
;
951 struct list_head dirty_cowonly_roots
;
953 struct btrfs_fs_devices
*fs_devices
;
956 * the space_info list is almost entirely read only. It only changes
957 * when we add a new raid type to the FS, and that happens
958 * very rarely. RCU is used to protect it.
960 struct list_head space_info
;
962 struct reloc_control
*reloc_ctl
;
964 spinlock_t delalloc_lock
;
965 spinlock_t new_trans_lock
;
968 /* data_alloc_cluster is only used in ssd mode */
969 struct btrfs_free_cluster data_alloc_cluster
;
971 /* all metadata allocations go through this cluster */
972 struct btrfs_free_cluster meta_alloc_cluster
;
974 spinlock_t ref_cache_lock
;
975 u64 total_ref_cache_size
;
977 u64 avail_data_alloc_bits
;
978 u64 avail_metadata_alloc_bits
;
979 u64 avail_system_alloc_bits
;
980 u64 data_alloc_profile
;
981 u64 metadata_alloc_profile
;
982 u64 system_alloc_profile
;
984 unsigned data_chunk_allocations
;
985 unsigned metadata_ratio
;
991 * in ram representation of the tree. extent_root is used for all allocations
992 * and for the extent tree extent_root root.
995 struct extent_buffer
*node
;
997 /* the node lock is held while changing the node pointer */
998 spinlock_t node_lock
;
1000 struct extent_buffer
*commit_root
;
1001 struct btrfs_root
*log_root
;
1002 struct btrfs_root
*reloc_root
;
1004 struct btrfs_root_item root_item
;
1005 struct btrfs_key root_key
;
1006 struct btrfs_fs_info
*fs_info
;
1007 struct extent_io_tree dirty_log_pages
;
1009 struct kobject root_kobj
;
1010 struct completion kobj_unregister
;
1011 struct mutex objectid_mutex
;
1013 struct mutex log_mutex
;
1014 wait_queue_head_t log_writer_wait
;
1015 wait_queue_head_t log_commit_wait
[2];
1016 atomic_t log_writers
;
1017 atomic_t log_commit
[2];
1018 unsigned long log_transid
;
1019 unsigned long last_log_commit
;
1020 unsigned long log_batch
;
1021 pid_t log_start_pid
;
1022 bool log_multiple_pids
;
1027 /* data allocations are done in sectorsize units */
1030 /* node allocations are done in nodesize units */
1033 /* leaf allocations are done in leafsize units */
1040 u64 highest_objectid
;
1046 u64 defrag_trans_start
;
1047 struct btrfs_key defrag_progress
;
1048 struct btrfs_key defrag_max
;
1053 /* the dirty list is only used by non-reference counted roots */
1054 struct list_head dirty_list
;
1056 struct list_head root_list
;
1058 spinlock_t list_lock
;
1059 struct list_head orphan_list
;
1061 spinlock_t inode_lock
;
1062 /* red-black tree that keeps track of in-memory inodes */
1063 struct rb_root inode_tree
;
1066 * right now this just gets used so that a root has its own devid
1067 * for stat. It may be used for more later
1069 struct super_block anon_super
;
1073 * inode items have the data typically returned from stat and store other
1074 * info about object characteristics. There is one for every file and dir in
1077 #define BTRFS_INODE_ITEM_KEY 1
1078 #define BTRFS_INODE_REF_KEY 12
1079 #define BTRFS_XATTR_ITEM_KEY 24
1080 #define BTRFS_ORPHAN_ITEM_KEY 48
1081 /* reserve 2-15 close to the inode for later flexibility */
1084 * dir items are the name -> inode pointers in a directory. There is one
1085 * for every name in a directory.
1087 #define BTRFS_DIR_LOG_ITEM_KEY 60
1088 #define BTRFS_DIR_LOG_INDEX_KEY 72
1089 #define BTRFS_DIR_ITEM_KEY 84
1090 #define BTRFS_DIR_INDEX_KEY 96
1092 * extent data is for file data
1094 #define BTRFS_EXTENT_DATA_KEY 108
1097 * extent csums are stored in a separate tree and hold csums for
1098 * an entire extent on disk.
1100 #define BTRFS_EXTENT_CSUM_KEY 128
1103 * root items point to tree roots. They are typically in the root
1104 * tree used by the super block to find all the other trees
1106 #define BTRFS_ROOT_ITEM_KEY 132
1109 * root backrefs tie subvols and snapshots to the directory entries that
1112 #define BTRFS_ROOT_BACKREF_KEY 144
1115 * root refs make a fast index for listing all of the snapshots and
1116 * subvolumes referenced by a given root. They point directly to the
1117 * directory item in the root that references the subvol
1119 #define BTRFS_ROOT_REF_KEY 156
1122 * extent items are in the extent map tree. These record which blocks
1123 * are used, and how many references there are to each block
1125 #define BTRFS_EXTENT_ITEM_KEY 168
1127 #define BTRFS_TREE_BLOCK_REF_KEY 176
1129 #define BTRFS_EXTENT_DATA_REF_KEY 178
1131 #define BTRFS_EXTENT_REF_V0_KEY 180
1133 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1135 #define BTRFS_SHARED_DATA_REF_KEY 184
1138 * block groups give us hints into the extent allocation trees. Which
1139 * blocks are free etc etc
1141 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1143 #define BTRFS_DEV_EXTENT_KEY 204
1144 #define BTRFS_DEV_ITEM_KEY 216
1145 #define BTRFS_CHUNK_ITEM_KEY 228
1148 * string items are for debugging. They just store a short string of
1151 #define BTRFS_STRING_ITEM_KEY 253
1153 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1154 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1155 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1156 #define BTRFS_MOUNT_SSD (1 << 3)
1157 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1158 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1159 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1160 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1161 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1162 #define BTRFS_MOUNT_NOSSD (1 << 9)
1163 #define BTRFS_MOUNT_DISCARD (1 << 10)
1165 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1166 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1167 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1172 #define BTRFS_INODE_NODATASUM (1 << 0)
1173 #define BTRFS_INODE_NODATACOW (1 << 1)
1174 #define BTRFS_INODE_READONLY (1 << 2)
1175 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1176 #define BTRFS_INODE_PREALLOC (1 << 4)
1177 #define BTRFS_INODE_SYNC (1 << 5)
1178 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1179 #define BTRFS_INODE_APPEND (1 << 7)
1180 #define BTRFS_INODE_NODUMP (1 << 8)
1181 #define BTRFS_INODE_NOATIME (1 << 9)
1182 #define BTRFS_INODE_DIRSYNC (1 << 10)
1185 /* some macros to generate set/get funcs for the struct fields. This
1186 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1189 #define le8_to_cpu(v) (v)
1190 #define cpu_to_le8(v) (v)
1193 #define read_eb_member(eb, ptr, type, member, result) ( \
1194 read_extent_buffer(eb, (char *)(result), \
1195 ((unsigned long)(ptr)) + \
1196 offsetof(type, member), \
1197 sizeof(((type *)0)->member)))
1199 #define write_eb_member(eb, ptr, type, member, result) ( \
1200 write_extent_buffer(eb, (char *)(result), \
1201 ((unsigned long)(ptr)) + \
1202 offsetof(type, member), \
1203 sizeof(((type *)0)->member)))
1205 #ifndef BTRFS_SETGET_FUNCS
1206 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1207 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1208 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1211 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1212 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1214 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1215 u##bits res = le##bits##_to_cpu(p->member); \
1216 kunmap_atomic(p, KM_USER0); \
1219 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1222 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1223 p->member = cpu_to_le##bits(val); \
1224 kunmap_atomic(p, KM_USER0); \
1227 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1228 static inline u##bits btrfs_##name(type *s) \
1230 return le##bits##_to_cpu(s->member); \
1232 static inline void btrfs_set_##name(type *s, u##bits val) \
1234 s->member = cpu_to_le##bits(val); \
1237 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1238 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1239 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1240 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1241 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1242 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1244 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1245 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1246 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1247 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1248 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1249 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1251 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1252 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1254 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1256 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1258 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1260 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1262 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1263 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1265 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1267 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1269 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1272 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1274 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1277 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1279 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1282 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1283 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1284 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1285 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1286 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1287 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1288 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1289 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1290 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1291 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1292 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1294 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1296 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1299 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1300 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1301 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1303 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1305 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1307 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1309 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1310 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1312 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1314 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1315 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1317 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1320 unsigned long offset
= (unsigned long)c
;
1321 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1322 offset
+= nr
* sizeof(struct btrfs_stripe
);
1323 return (struct btrfs_stripe
*)offset
;
1326 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1328 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1331 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1332 struct btrfs_chunk
*c
, int nr
)
1334 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1337 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1338 struct btrfs_chunk
*c
, int nr
,
1341 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1344 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1345 struct btrfs_chunk
*c
, int nr
)
1347 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1350 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1351 struct btrfs_chunk
*c
, int nr
,
1354 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1357 /* struct btrfs_block_group_item */
1358 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1360 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1362 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1363 struct btrfs_block_group_item
, chunk_objectid
, 64);
1365 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1366 struct btrfs_block_group_item
, chunk_objectid
, 64);
1367 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1368 struct btrfs_block_group_item
, flags
, 64);
1369 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1370 struct btrfs_block_group_item
, flags
, 64);
1372 /* struct btrfs_inode_ref */
1373 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1374 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1376 /* struct btrfs_inode_item */
1377 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1378 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1379 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1380 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1381 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1382 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1383 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1384 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1385 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1386 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1387 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1388 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1390 static inline struct btrfs_timespec
*
1391 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1393 unsigned long ptr
= (unsigned long)inode_item
;
1394 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1395 return (struct btrfs_timespec
*)ptr
;
1398 static inline struct btrfs_timespec
*
1399 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1401 unsigned long ptr
= (unsigned long)inode_item
;
1402 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1403 return (struct btrfs_timespec
*)ptr
;
1406 static inline struct btrfs_timespec
*
1407 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1409 unsigned long ptr
= (unsigned long)inode_item
;
1410 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1411 return (struct btrfs_timespec
*)ptr
;
1414 static inline struct btrfs_timespec
*
1415 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1417 unsigned long ptr
= (unsigned long)inode_item
;
1418 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1419 return (struct btrfs_timespec
*)ptr
;
1422 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1423 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1425 /* struct btrfs_dev_extent */
1426 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1428 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1429 chunk_objectid
, 64);
1430 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1432 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1434 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1436 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1437 return (u8
*)((unsigned long)dev
+ ptr
);
1440 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1441 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1443 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1445 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1448 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1450 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1451 struct btrfs_tree_block_info
*item
,
1452 struct btrfs_disk_key
*key
)
1454 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1457 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1458 struct btrfs_tree_block_info
*item
,
1459 struct btrfs_disk_key
*key
)
1461 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1464 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1466 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1468 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1470 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1473 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1476 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1478 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1481 static inline u32
btrfs_extent_inline_ref_size(int type
)
1483 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1484 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1485 return sizeof(struct btrfs_extent_inline_ref
);
1486 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1487 return sizeof(struct btrfs_shared_data_ref
) +
1488 sizeof(struct btrfs_extent_inline_ref
);
1489 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1490 return sizeof(struct btrfs_extent_data_ref
) +
1491 offsetof(struct btrfs_extent_inline_ref
, offset
);
1496 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1497 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1499 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1500 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1502 /* struct btrfs_node */
1503 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1504 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1506 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1509 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1510 sizeof(struct btrfs_key_ptr
) * nr
;
1511 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1514 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1518 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1519 sizeof(struct btrfs_key_ptr
) * nr
;
1520 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1523 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1526 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1527 sizeof(struct btrfs_key_ptr
) * nr
;
1528 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1531 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1535 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1536 sizeof(struct btrfs_key_ptr
) * nr
;
1537 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1540 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1542 return offsetof(struct btrfs_node
, ptrs
) +
1543 sizeof(struct btrfs_key_ptr
) * nr
;
1546 void btrfs_node_key(struct extent_buffer
*eb
,
1547 struct btrfs_disk_key
*disk_key
, int nr
);
1549 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1550 struct btrfs_disk_key
*disk_key
, int nr
)
1553 ptr
= btrfs_node_key_ptr_offset(nr
);
1554 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1555 struct btrfs_key_ptr
, key
, disk_key
);
1558 /* struct btrfs_item */
1559 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1560 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1562 static inline unsigned long btrfs_item_nr_offset(int nr
)
1564 return offsetof(struct btrfs_leaf
, items
) +
1565 sizeof(struct btrfs_item
) * nr
;
1568 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1571 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1574 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1575 struct btrfs_item
*item
)
1577 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1580 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1582 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1585 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1587 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1590 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1592 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1595 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1596 struct btrfs_disk_key
*disk_key
, int nr
)
1598 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1599 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1602 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1603 struct btrfs_disk_key
*disk_key
, int nr
)
1605 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1606 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1609 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1612 * struct btrfs_root_ref
1614 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1615 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1616 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1618 /* struct btrfs_dir_item */
1619 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1620 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1621 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1622 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1624 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1625 struct btrfs_dir_item
*item
,
1626 struct btrfs_disk_key
*key
)
1628 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1631 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1632 struct btrfs_dir_item
*item
,
1633 struct btrfs_disk_key
*key
)
1635 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1638 /* struct btrfs_disk_key */
1639 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1641 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1642 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1644 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1645 struct btrfs_disk_key
*disk
)
1647 cpu
->offset
= le64_to_cpu(disk
->offset
);
1648 cpu
->type
= disk
->type
;
1649 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1652 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1653 struct btrfs_key
*cpu
)
1655 disk
->offset
= cpu_to_le64(cpu
->offset
);
1656 disk
->type
= cpu
->type
;
1657 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1660 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1661 struct btrfs_key
*key
, int nr
)
1663 struct btrfs_disk_key disk_key
;
1664 btrfs_node_key(eb
, &disk_key
, nr
);
1665 btrfs_disk_key_to_cpu(key
, &disk_key
);
1668 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1669 struct btrfs_key
*key
, int nr
)
1671 struct btrfs_disk_key disk_key
;
1672 btrfs_item_key(eb
, &disk_key
, nr
);
1673 btrfs_disk_key_to_cpu(key
, &disk_key
);
1676 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1677 struct btrfs_dir_item
*item
,
1678 struct btrfs_key
*key
)
1680 struct btrfs_disk_key disk_key
;
1681 btrfs_dir_item_key(eb
, item
, &disk_key
);
1682 btrfs_disk_key_to_cpu(key
, &disk_key
);
1686 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1691 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1696 /* struct btrfs_header */
1697 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1698 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1700 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1701 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1702 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1703 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1705 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1707 return (btrfs_header_flags(eb
) & flag
) == flag
;
1710 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1712 u64 flags
= btrfs_header_flags(eb
);
1713 btrfs_set_header_flags(eb
, flags
| flag
);
1714 return (flags
& flag
) == flag
;
1717 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1719 u64 flags
= btrfs_header_flags(eb
);
1720 btrfs_set_header_flags(eb
, flags
& ~flag
);
1721 return (flags
& flag
) == flag
;
1724 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1726 u64 flags
= btrfs_header_flags(eb
);
1727 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1730 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1733 u64 flags
= btrfs_header_flags(eb
);
1734 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1735 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1736 btrfs_set_header_flags(eb
, flags
);
1739 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1741 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1745 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1747 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1751 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1753 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1757 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1759 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1763 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1768 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1773 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1778 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1780 return btrfs_header_level(eb
) == 0;
1783 /* struct btrfs_root_item */
1784 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1786 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1787 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1788 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1790 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1792 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1793 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1794 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1795 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1796 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1797 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1798 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1799 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1802 /* struct btrfs_super_block */
1804 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1805 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1806 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1808 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1809 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1810 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1811 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1812 struct btrfs_super_block
, chunk_root_generation
, 64);
1813 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1815 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1817 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1818 chunk_root_level
, 8);
1819 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1821 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1822 log_root_transid
, 64);
1823 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1825 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1827 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1829 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1831 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1833 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1835 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1837 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1838 root_dir_objectid
, 64);
1839 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1841 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1843 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1845 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1846 incompat_flags
, 64);
1847 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1850 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1852 int t
= btrfs_super_csum_type(s
);
1853 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1854 return btrfs_csum_sizes
[t
];
1857 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1859 return offsetof(struct btrfs_leaf
, items
);
1862 /* struct btrfs_file_extent_item */
1863 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1865 static inline unsigned long
1866 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
1868 unsigned long offset
= (unsigned long)e
;
1869 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1873 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1875 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1878 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1880 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1882 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1883 disk_num_bytes
, 64);
1884 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1886 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1888 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1890 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1892 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1894 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1895 other_encoding
, 16);
1897 /* this returns the number of file bytes represented by the inline item.
1898 * If an item is compressed, this is the uncompressed size
1900 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1901 struct btrfs_file_extent_item
*e
)
1903 return btrfs_file_extent_ram_bytes(eb
, e
);
1907 * this returns the number of bytes used by the item on disk, minus the
1908 * size of any extent headers. If a file is compressed on disk, this is
1909 * the compressed size
1911 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1912 struct btrfs_item
*e
)
1914 unsigned long offset
;
1915 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1916 return btrfs_item_size(eb
, e
) - offset
;
1919 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1921 return sb
->s_fs_info
;
1924 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1925 const char *name
, int len
)
1927 /* if we already have a name just free it */
1930 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1934 memcpy(root
->name
, name
, len
);
1935 root
->name
[len
] = '\0';
1940 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
1943 return root
->leafsize
;
1944 return root
->nodesize
;
1947 /* helper function to cast into the data area of the leaf. */
1948 #define btrfs_item_ptr(leaf, slot, type) \
1949 ((type *)(btrfs_leaf_data(leaf) + \
1950 btrfs_item_offset_nr(leaf, slot)))
1952 #define btrfs_item_ptr_offset(leaf, slot) \
1953 ((unsigned long)(btrfs_leaf_data(leaf) + \
1954 btrfs_item_offset_nr(leaf, slot)))
1956 static inline struct dentry
*fdentry(struct file
*file
)
1958 return file
->f_path
.dentry
;
1962 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
1963 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
1964 struct btrfs_root
*root
, unsigned long count
);
1965 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1966 int btrfs_pin_extent(struct btrfs_root
*root
,
1967 u64 bytenr
, u64 num
, int reserved
);
1968 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
1969 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1970 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
1971 struct btrfs_root
*root
,
1972 u64 objectid
, u64 offset
, u64 bytenr
);
1973 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1974 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
1975 struct btrfs_fs_info
*info
,
1977 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
1978 u64
btrfs_find_block_group(struct btrfs_root
*root
,
1979 u64 search_start
, u64 search_hint
, int owner
);
1980 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1981 struct btrfs_root
*root
, u32 blocksize
,
1982 u64 parent
, u64 root_objectid
,
1983 struct btrfs_disk_key
*key
, int level
,
1984 u64 hint
, u64 empty_size
);
1985 int btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
1986 struct btrfs_root
*root
,
1987 u64 bytenr
, u32 blocksize
,
1988 u64 parent
, u64 root_objectid
, int level
);
1989 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
1990 struct btrfs_root
*root
,
1991 u64 bytenr
, u32 blocksize
,
1993 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
1994 struct btrfs_root
*root
,
1995 u64 root_objectid
, u64 owner
,
1996 u64 offset
, struct btrfs_key
*ins
);
1997 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
1998 struct btrfs_root
*root
,
1999 u64 root_objectid
, u64 owner
, u64 offset
,
2000 struct btrfs_key
*ins
);
2001 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2002 struct btrfs_root
*root
,
2003 u64 num_bytes
, u64 min_alloc_size
,
2004 u64 empty_size
, u64 hint_byte
,
2005 u64 search_end
, struct btrfs_key
*ins
,
2007 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2008 struct extent_buffer
*buf
, int full_backref
);
2009 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2010 struct extent_buffer
*buf
, int full_backref
);
2011 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2012 struct btrfs_root
*root
,
2013 u64 bytenr
, u64 num_bytes
, u64 flags
,
2015 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2016 struct btrfs_root
*root
,
2017 u64 bytenr
, u64 num_bytes
, u64 parent
,
2018 u64 root_objectid
, u64 owner
, u64 offset
);
2020 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2021 int btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2022 struct btrfs_root
*root
);
2023 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2024 struct btrfs_root
*root
);
2025 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2026 struct btrfs_root
*root
,
2027 u64 bytenr
, u64 num_bytes
, u64 parent
,
2028 u64 root_objectid
, u64 owner
, u64 offset
);
2030 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2031 struct btrfs_root
*root
);
2032 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2033 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2034 int btrfs_read_block_groups(struct btrfs_root
*root
);
2035 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2036 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2037 struct btrfs_root
*root
, u64 bytes_used
,
2038 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2040 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2041 struct btrfs_root
*root
, u64 group_start
);
2042 int btrfs_prepare_block_group_relocation(struct btrfs_root
*root
,
2043 struct btrfs_block_group_cache
*group
);
2045 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2046 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2047 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2049 int btrfs_reserve_metadata_space(struct btrfs_root
*root
, int num_items
);
2050 int btrfs_unreserve_metadata_space(struct btrfs_root
*root
, int num_items
);
2051 int btrfs_unreserve_metadata_for_delalloc(struct btrfs_root
*root
,
2052 struct inode
*inode
, int num_items
);
2053 int btrfs_reserve_metadata_for_delalloc(struct btrfs_root
*root
,
2054 struct inode
*inode
, int num_items
);
2055 int btrfs_check_data_free_space(struct btrfs_root
*root
, struct inode
*inode
,
2057 void btrfs_free_reserved_data_space(struct btrfs_root
*root
,
2058 struct inode
*inode
, u64 bytes
);
2059 void btrfs_delalloc_reserve_space(struct btrfs_root
*root
, struct inode
*inode
,
2061 void btrfs_delalloc_free_space(struct btrfs_root
*root
, struct inode
*inode
,
2064 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2065 int level
, int *slot
);
2066 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2067 int btrfs_previous_item(struct btrfs_root
*root
,
2068 struct btrfs_path
*path
, u64 min_objectid
,
2070 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2071 struct btrfs_root
*root
, struct btrfs_path
*path
,
2072 struct btrfs_key
*new_key
);
2073 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2074 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2075 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2076 struct btrfs_key
*key
, int lowest_level
,
2077 int cache_only
, u64 min_trans
);
2078 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2079 struct btrfs_key
*max_key
,
2080 struct btrfs_path
*path
, int cache_only
,
2082 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2083 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2084 struct extent_buffer
*parent
, int parent_slot
,
2085 struct extent_buffer
**cow_ret
);
2086 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2087 struct btrfs_root
*root
,
2088 struct extent_buffer
*buf
,
2089 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2090 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2091 struct extent_buffer
*buf
);
2092 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2093 *root
, struct btrfs_path
*path
, u32 data_size
);
2094 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2095 struct btrfs_root
*root
,
2096 struct btrfs_path
*path
,
2097 u32 new_size
, int from_end
);
2098 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2099 struct btrfs_root
*root
,
2100 struct btrfs_path
*path
,
2101 struct btrfs_key
*new_key
,
2102 unsigned long split_offset
);
2103 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2104 struct btrfs_root
*root
,
2105 struct btrfs_path
*path
,
2106 struct btrfs_key
*new_key
);
2107 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2108 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2110 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2111 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2112 int start_slot
, int cache_only
, u64
*last_ret
,
2113 struct btrfs_key
*progress
);
2114 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
2115 struct btrfs_path
*btrfs_alloc_path(void);
2116 void btrfs_free_path(struct btrfs_path
*p
);
2117 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2118 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2120 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2121 struct btrfs_path
*path
, int slot
, int nr
);
2122 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2123 struct btrfs_root
*root
,
2124 struct btrfs_path
*path
)
2126 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2129 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2130 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2131 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
2132 struct btrfs_root
*root
,
2133 struct btrfs_path
*path
,
2134 struct btrfs_key
*cpu_key
, u32
*data_size
,
2136 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2137 struct btrfs_root
*root
,
2138 struct btrfs_path
*path
,
2139 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2141 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2142 struct btrfs_root
*root
,
2143 struct btrfs_path
*path
,
2144 struct btrfs_key
*key
,
2147 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2150 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2151 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2152 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2153 int btrfs_drop_snapshot(struct btrfs_root
*root
, int update_ref
);
2154 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2155 struct btrfs_root
*root
,
2156 struct extent_buffer
*node
,
2157 struct extent_buffer
*parent
);
2159 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2160 struct btrfs_path
*path
,
2161 u64 root_id
, u64 ref_id
);
2162 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2163 struct btrfs_root
*tree_root
,
2164 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2165 const char *name
, int name_len
);
2166 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2167 struct btrfs_root
*tree_root
,
2168 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2169 const char *name
, int name_len
);
2170 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2171 struct btrfs_key
*key
);
2172 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2173 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2175 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2176 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2178 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2179 btrfs_root_item
*item
, struct btrfs_key
*key
);
2180 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
2181 u64
*found_objectid
);
2182 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2183 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2184 int btrfs_set_root_node(struct btrfs_root_item
*item
,
2185 struct extent_buffer
*node
);
2187 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2188 struct btrfs_root
*root
, const char *name
,
2189 int name_len
, u64 dir
,
2190 struct btrfs_key
*location
, u8 type
, u64 index
);
2191 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2192 struct btrfs_root
*root
,
2193 struct btrfs_path
*path
, u64 dir
,
2194 const char *name
, int name_len
,
2196 struct btrfs_dir_item
*
2197 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2198 struct btrfs_root
*root
,
2199 struct btrfs_path
*path
, u64 dir
,
2200 u64 objectid
, const char *name
, int name_len
,
2202 struct btrfs_dir_item
*
2203 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2204 struct btrfs_path
*path
, u64 dirid
,
2205 const char *name
, int name_len
);
2206 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2207 struct btrfs_path
*path
,
2208 const char *name
, int name_len
);
2209 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2210 struct btrfs_root
*root
,
2211 struct btrfs_path
*path
,
2212 struct btrfs_dir_item
*di
);
2213 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2214 struct btrfs_root
*root
,
2215 struct btrfs_path
*path
, u64 objectid
,
2216 const char *name
, u16 name_len
,
2217 const void *data
, u16 data_len
);
2218 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2219 struct btrfs_root
*root
,
2220 struct btrfs_path
*path
, u64 dir
,
2221 const char *name
, u16 name_len
,
2225 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2226 struct btrfs_root
*root
, u64 offset
);
2227 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2228 struct btrfs_root
*root
, u64 offset
);
2229 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2232 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2233 struct btrfs_root
*fs_root
,
2234 u64 dirid
, u64
*objectid
);
2235 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2238 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2239 struct btrfs_root
*root
,
2240 const char *name
, int name_len
,
2241 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2242 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2243 struct btrfs_root
*root
,
2244 const char *name
, int name_len
,
2245 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2246 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2247 struct btrfs_root
*root
,
2248 struct btrfs_path
*path
, u64 objectid
);
2249 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2250 *root
, struct btrfs_path
*path
,
2251 struct btrfs_key
*location
, int mod
);
2254 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2255 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2256 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2257 struct bio
*bio
, u32
*dst
);
2258 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2259 struct btrfs_root
*root
,
2260 u64 objectid
, u64 pos
,
2261 u64 disk_offset
, u64 disk_num_bytes
,
2262 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2263 u8 compression
, u8 encryption
, u16 other_encoding
);
2264 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2265 struct btrfs_root
*root
,
2266 struct btrfs_path
*path
, u64 objectid
,
2267 u64 bytenr
, int mod
);
2268 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2269 struct btrfs_root
*root
,
2270 struct btrfs_ordered_sum
*sums
);
2271 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2272 struct bio
*bio
, u64 file_start
, int contig
);
2273 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
2274 u64 start
, unsigned long len
);
2275 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2276 struct btrfs_root
*root
,
2277 struct btrfs_path
*path
,
2278 u64 bytenr
, int cow
);
2279 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2280 struct btrfs_root
*root
, struct btrfs_path
*path
,
2282 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
2283 u64 end
, struct list_head
*list
);
2286 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2287 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2288 #define ClearPageChecked ClearPageFsMisc
2289 #define SetPageChecked SetPageFsMisc
2290 #define PageChecked PageFsMisc
2293 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2294 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2295 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2296 struct btrfs_root
*root
,
2297 struct inode
*dir
, struct inode
*inode
,
2298 const char *name
, int name_len
);
2299 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2300 struct inode
*parent_inode
, struct inode
*inode
,
2301 const char *name
, int name_len
, int add_backref
, u64 index
);
2302 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
2303 struct btrfs_root
*root
,
2304 struct inode
*dir
, u64 objectid
,
2305 const char *name
, int name_len
);
2306 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2307 struct btrfs_root
*root
,
2308 struct inode
*inode
, u64 new_size
,
2311 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
2312 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
);
2313 int btrfs_writepages(struct address_space
*mapping
,
2314 struct writeback_control
*wbc
);
2315 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2316 struct btrfs_root
*new_root
,
2317 u64 new_dirid
, u64 alloc_hint
);
2318 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2319 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2321 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2322 struct file_ra_state
*ra
, struct file
*file
,
2323 pgoff_t offset
, pgoff_t last_index
);
2324 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2325 int btrfs_readpage(struct file
*file
, struct page
*page
);
2326 void btrfs_delete_inode(struct inode
*inode
);
2327 void btrfs_put_inode(struct inode
*inode
);
2328 int btrfs_write_inode(struct inode
*inode
, int wait
);
2329 void btrfs_dirty_inode(struct inode
*inode
);
2330 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2331 void btrfs_destroy_inode(struct inode
*inode
);
2332 void btrfs_drop_inode(struct inode
*inode
);
2333 int btrfs_init_cachep(void);
2334 void btrfs_destroy_cachep(void);
2335 long btrfs_ioctl_trans_end(struct file
*file
);
2336 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2337 struct btrfs_root
*root
);
2338 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2339 unsigned from
, unsigned to
);
2340 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2341 size_t page_offset
, u64 start
, u64 end
,
2343 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2344 struct btrfs_root
*root
,
2345 struct inode
*inode
);
2346 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2347 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2348 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
2349 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
2350 int btrfs_invalidate_inodes(struct btrfs_root
*root
);
2351 void btrfs_add_delayed_iput(struct inode
*inode
);
2352 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
2353 extern const struct dentry_operations btrfs_dentry_operations
;
2356 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2357 void btrfs_update_iflags(struct inode
*inode
);
2358 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2361 int btrfs_sync_file(struct file
*file
, struct dentry
*dentry
, int datasync
);
2362 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2364 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2365 extern const struct file_operations btrfs_file_operations
;
2366 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
, struct inode
*inode
,
2367 u64 start
, u64 end
, u64
*hint_byte
, int drop_cache
);
2368 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2369 struct inode
*inode
, u64 start
, u64 end
);
2370 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2373 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2374 struct btrfs_root
*root
, int cache_only
);
2377 int btrfs_init_sysfs(void);
2378 void btrfs_exit_sysfs(void);
2379 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2380 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2381 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2382 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2385 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2388 u64
btrfs_parse_size(char *str
);
2389 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2390 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2393 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
2394 int btrfs_check_acl(struct inode
*inode
, int mask
);
2396 #define btrfs_check_acl NULL
2398 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
2399 struct inode
*inode
, struct inode
*dir
);
2400 int btrfs_acl_chmod(struct inode
*inode
);
2403 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
2404 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
2405 struct btrfs_root
*root
);
2406 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
2407 struct btrfs_root
*root
);
2408 int btrfs_recover_relocation(struct btrfs_root
*root
);
2409 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);