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_ACL_NOT_CACHED ((void *)-1)
46 #define BTRFS_MAX_LEVEL 8
48 #define BTRFS_COMPAT_EXTENT_TREE_V0
51 * files bigger than this get some pre-flushing when they are added
52 * to the ordered operations list. That way we limit the total
53 * work done by the commit
55 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
57 /* holds pointers to all of the tree roots */
58 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
60 /* stores information about which extents are in use, and reference counts */
61 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
64 * chunk tree stores translations from logical -> physical block numbering
65 * the super block points to the chunk tree
67 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
70 * stores information about which areas of a given device are in use.
71 * one per device. The tree of tree roots points to the device tree
73 #define BTRFS_DEV_TREE_OBJECTID 4ULL
75 /* one per subvolume, storing files and directories */
76 #define BTRFS_FS_TREE_OBJECTID 5ULL
78 /* directory objectid inside the root tree */
79 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
81 /* holds checksums of all the data extents */
82 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
84 /* orhpan objectid for tracking unlinked/truncated files */
85 #define BTRFS_ORPHAN_OBJECTID -5ULL
87 /* does write ahead logging to speed up fsyncs */
88 #define BTRFS_TREE_LOG_OBJECTID -6ULL
89 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
91 /* for space balancing */
92 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
93 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
96 * extent checksums all have this objectid
97 * this allows them to share the logging tree
100 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
102 /* dummy objectid represents multiple objectids */
103 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
106 * All files have objectids in this range.
108 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
109 #define BTRFS_LAST_FREE_OBJECTID -256ULL
110 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
114 * the device items go into the chunk tree. The key is in the form
115 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
117 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
120 * we can actually store much bigger names, but lets not confuse the rest
123 #define BTRFS_NAME_LEN 255
125 /* 32 bytes in various csum fields */
126 #define BTRFS_CSUM_SIZE 32
129 #define BTRFS_CSUM_TYPE_CRC32 0
131 static int btrfs_csum_sizes
[] = { 4, 0 };
133 /* four bytes for CRC32 */
134 #define BTRFS_EMPTY_DIR_SIZE 0
136 #define BTRFS_FT_UNKNOWN 0
137 #define BTRFS_FT_REG_FILE 1
138 #define BTRFS_FT_DIR 2
139 #define BTRFS_FT_CHRDEV 3
140 #define BTRFS_FT_BLKDEV 4
141 #define BTRFS_FT_FIFO 5
142 #define BTRFS_FT_SOCK 6
143 #define BTRFS_FT_SYMLINK 7
144 #define BTRFS_FT_XATTR 8
145 #define BTRFS_FT_MAX 9
148 * The key defines the order in the tree, and so it also defines (optimal)
151 * objectid corresponds to the inode number.
153 * type tells us things about the object, and is a kind of stream selector.
154 * so for a given inode, keys with type of 1 might refer to the inode data,
155 * type of 2 may point to file data in the btree and type == 3 may point to
158 * offset is the starting byte offset for this key in the stream.
160 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
161 * in cpu native order. Otherwise they are identical and their sizes
162 * should be the same (ie both packed)
164 struct btrfs_disk_key
{
168 } __attribute__ ((__packed__
));
174 } __attribute__ ((__packed__
));
176 struct btrfs_mapping_tree
{
177 struct extent_map_tree map_tree
;
180 #define BTRFS_UUID_SIZE 16
181 struct btrfs_dev_item
{
182 /* the internal btrfs device id */
185 /* size of the device */
191 /* optimal io alignment for this device */
194 /* optimal io width for this device */
197 /* minimal io size for this device */
200 /* type and info about this device */
203 /* expected generation for this device */
207 * starting byte of this partition on the device,
208 * to allow for stripe alignment in the future
212 /* grouping information for allocation decisions */
215 /* seek speed 0-100 where 100 is fastest */
218 /* bandwidth 0-100 where 100 is fastest */
221 /* btrfs generated uuid for this device */
222 u8 uuid
[BTRFS_UUID_SIZE
];
224 /* uuid of FS who owns this device */
225 u8 fsid
[BTRFS_UUID_SIZE
];
226 } __attribute__ ((__packed__
));
228 struct btrfs_stripe
{
231 u8 dev_uuid
[BTRFS_UUID_SIZE
];
232 } __attribute__ ((__packed__
));
235 /* size of this chunk in bytes */
238 /* objectid of the root referencing this chunk */
244 /* optimal io alignment for this chunk */
247 /* optimal io width for this chunk */
250 /* minimal io size for this chunk */
253 /* 2^16 stripes is quite a lot, a second limit is the size of a single
258 /* sub stripes only matter for raid10 */
260 struct btrfs_stripe stripe
;
261 /* additional stripes go here */
262 } __attribute__ ((__packed__
));
264 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
266 BUG_ON(num_stripes
== 0);
267 return sizeof(struct btrfs_chunk
) +
268 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
271 #define BTRFS_FSID_SIZE 16
272 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
273 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
274 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
275 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
277 #define BTRFS_BACKREF_REV_MAX 256
278 #define BTRFS_BACKREF_REV_SHIFT 56
279 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
280 BTRFS_BACKREF_REV_SHIFT)
282 #define BTRFS_OLD_BACKREF_REV 0
283 #define BTRFS_MIXED_BACKREF_REV 1
286 * every tree block (leaf or node) starts with this header.
288 struct btrfs_header
{
289 /* these first four must match the super block */
290 u8 csum
[BTRFS_CSUM_SIZE
];
291 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
292 __le64 bytenr
; /* which block this node is supposed to live in */
295 /* allowed to be different from the super from here on down */
296 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
301 } __attribute__ ((__packed__
));
303 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
304 sizeof(struct btrfs_header)) / \
305 sizeof(struct btrfs_key_ptr))
306 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
307 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
308 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
309 sizeof(struct btrfs_item) - \
310 sizeof(struct btrfs_file_extent_item))
314 * this is a very generous portion of the super block, giving us
315 * room to translate 14 chunks with 3 stripes each.
317 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
318 #define BTRFS_LABEL_SIZE 256
321 * the super block basically lists the main trees of the FS
322 * it currently lacks any block count etc etc
324 struct btrfs_super_block
{
325 u8 csum
[BTRFS_CSUM_SIZE
];
326 /* the first 4 fields must match struct btrfs_header */
327 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
328 __le64 bytenr
; /* this block number */
331 /* allowed to be different from the btrfs_header from here own down */
338 /* this will help find the new super based on the log root */
339 __le64 log_root_transid
;
342 __le64 root_dir_objectid
;
348 __le32 sys_chunk_array_size
;
349 __le64 chunk_root_generation
;
351 __le64 compat_ro_flags
;
352 __le64 incompat_flags
;
357 struct btrfs_dev_item dev_item
;
359 char label
[BTRFS_LABEL_SIZE
];
361 /* future expansion */
363 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
364 } __attribute__ ((__packed__
));
367 * Compat flags that we support. If any incompat flags are set other than the
368 * ones specified below then we will fail to mount
370 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
372 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
373 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
374 #define BTRFS_FEATURE_INCOMPAT_SUPP \
375 BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF
378 * A leaf is full of items. offset and size tell us where to find
379 * the item in the leaf (relative to the start of the data area)
382 struct btrfs_disk_key key
;
385 } __attribute__ ((__packed__
));
388 * leaves have an item area and a data area:
389 * [item0, item1....itemN] [free space] [dataN...data1, data0]
391 * The data is separate from the items to get the keys closer together
395 struct btrfs_header header
;
396 struct btrfs_item items
[];
397 } __attribute__ ((__packed__
));
400 * all non-leaf blocks are nodes, they hold only keys and pointers to
403 struct btrfs_key_ptr
{
404 struct btrfs_disk_key key
;
407 } __attribute__ ((__packed__
));
410 struct btrfs_header header
;
411 struct btrfs_key_ptr ptrs
[];
412 } __attribute__ ((__packed__
));
415 * btrfs_paths remember the path taken from the root down to the leaf.
416 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
417 * to any other levels that are present.
419 * The slots array records the index of the item or block pointer
420 * used while walking the tree.
423 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
424 int slots
[BTRFS_MAX_LEVEL
];
425 /* if there is real range locking, this locks field will change */
426 int locks
[BTRFS_MAX_LEVEL
];
428 /* keep some upper locks as we walk down */
432 * set by btrfs_split_item, tells search_slot to keep all locks
433 * and to force calls to keep space in the nodes
435 unsigned int search_for_split
:1;
436 unsigned int keep_locks
:1;
437 unsigned int skip_locking
:1;
438 unsigned int leave_spinning
:1;
439 unsigned int search_commit_root
:1;
443 * items in the extent btree are used to record the objectid of the
444 * owner of the block and the number of references
447 struct btrfs_extent_item
{
451 } __attribute__ ((__packed__
));
453 struct btrfs_extent_item_v0
{
455 } __attribute__ ((__packed__
));
457 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
458 sizeof(struct btrfs_item))
460 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
461 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
463 /* following flags only apply to tree blocks */
465 /* use full backrefs for extent pointers in the block */
466 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
468 struct btrfs_tree_block_info
{
469 struct btrfs_disk_key key
;
471 } __attribute__ ((__packed__
));
473 struct btrfs_extent_data_ref
{
478 } __attribute__ ((__packed__
));
480 struct btrfs_shared_data_ref
{
482 } __attribute__ ((__packed__
));
484 struct btrfs_extent_inline_ref
{
487 } __attribute__ ((__packed__
));
489 /* old style backrefs item */
490 struct btrfs_extent_ref_v0
{
495 } __attribute__ ((__packed__
));
498 /* dev extents record free space on individual devices. The owner
499 * field points back to the chunk allocation mapping tree that allocated
500 * the extent. The chunk tree uuid field is a way to double check the owner
502 struct btrfs_dev_extent
{
504 __le64 chunk_objectid
;
507 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
508 } __attribute__ ((__packed__
));
510 struct btrfs_inode_ref
{
514 } __attribute__ ((__packed__
));
516 struct btrfs_timespec
{
519 } __attribute__ ((__packed__
));
521 enum btrfs_compression_type
{
522 BTRFS_COMPRESS_NONE
= 0,
523 BTRFS_COMPRESS_ZLIB
= 1,
524 BTRFS_COMPRESS_LAST
= 2,
527 struct btrfs_inode_item
{
528 /* nfs style generation number */
530 /* transid that last touched this inode */
542 /* modification sequence number for NFS */
546 * a little future expansion, for more than this we can
547 * just grow the inode item and version it
550 struct btrfs_timespec atime
;
551 struct btrfs_timespec ctime
;
552 struct btrfs_timespec mtime
;
553 struct btrfs_timespec otime
;
554 } __attribute__ ((__packed__
));
556 struct btrfs_dir_log_item
{
558 } __attribute__ ((__packed__
));
560 struct btrfs_dir_item
{
561 struct btrfs_disk_key location
;
566 } __attribute__ ((__packed__
));
568 struct btrfs_root_item
{
569 struct btrfs_inode_item inode
;
575 __le64 last_snapshot
;
578 struct btrfs_disk_key drop_progress
;
581 } __attribute__ ((__packed__
));
584 * this is used for both forward and backward root refs
586 struct btrfs_root_ref
{
590 } __attribute__ ((__packed__
));
592 #define BTRFS_FILE_EXTENT_INLINE 0
593 #define BTRFS_FILE_EXTENT_REG 1
594 #define BTRFS_FILE_EXTENT_PREALLOC 2
596 struct btrfs_file_extent_item
{
598 * transaction id that created this extent
602 * max number of bytes to hold this extent in ram
603 * when we split a compressed extent we can't know how big
604 * each of the resulting pieces will be. So, this is
605 * an upper limit on the size of the extent in ram instead of
611 * 32 bits for the various ways we might encode the data,
612 * including compression and encryption. If any of these
613 * are set to something a given disk format doesn't understand
614 * it is treated like an incompat flag for reading and writing,
619 __le16 other_encoding
; /* spare for later use */
621 /* are we inline data or a real extent? */
625 * disk space consumed by the extent, checksum blocks are included
629 __le64 disk_num_bytes
;
631 * the logical offset in file blocks (no csums)
632 * this extent record is for. This allows a file extent to point
633 * into the middle of an existing extent on disk, sharing it
634 * between two snapshots (useful if some bytes in the middle of the
635 * extent have changed
639 * the logical number of file blocks (no csums included). This
640 * always reflects the size uncompressed and without encoding.
644 } __attribute__ ((__packed__
));
646 struct btrfs_csum_item
{
648 } __attribute__ ((__packed__
));
650 /* different types of block groups (and chunks) */
651 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
652 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
653 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
654 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
655 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
656 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
657 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
659 struct btrfs_block_group_item
{
661 __le64 chunk_objectid
;
663 } __attribute__ ((__packed__
));
665 struct btrfs_space_info
{
668 u64 total_bytes
; /* total bytes in the space */
669 u64 bytes_used
; /* total bytes used on disk */
670 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
671 transaction finishes */
672 u64 bytes_reserved
; /* total bytes the allocator has reserved for
673 current allocations */
674 u64 bytes_readonly
; /* total bytes that are read only */
676 /* delalloc accounting */
677 u64 bytes_delalloc
; /* number of bytes reserved for allocation,
678 this space is not necessarily reserved yet
680 u64 bytes_may_use
; /* number of bytes that may be used for
683 int full
; /* indicates that we cannot allocate any more
684 chunks for this space */
685 int force_alloc
; /* set if we need to force a chunk alloc for
688 struct list_head list
;
690 /* for block groups in our same type */
691 struct list_head block_groups
;
693 struct rw_semaphore groups_sem
;
697 * free clusters are used to claim free space in relatively large chunks,
698 * allowing us to do less seeky writes. They are used for all metadata
699 * allocations and data allocations in ssd mode.
701 struct btrfs_free_cluster
{
703 spinlock_t refill_lock
;
706 /* largest extent in this cluster */
709 /* first extent starting offset */
712 struct btrfs_block_group_cache
*block_group
;
714 * when a cluster is allocated from a block group, we put the
715 * cluster onto a list in the block group so that it can
716 * be freed before the block group is freed.
718 struct list_head block_group_list
;
721 struct btrfs_block_group_cache
{
722 struct btrfs_key key
;
723 struct btrfs_block_group_item item
;
725 struct mutex cache_mutex
;
733 struct btrfs_space_info
*space_info
;
735 /* free space cache stuff */
736 spinlock_t tree_lock
;
737 struct rb_root free_space_bytes
;
738 struct rb_root free_space_offset
;
740 /* block group cache stuff */
741 struct rb_node cache_node
;
743 /* for block groups in the same raid type */
744 struct list_head list
;
749 /* List of struct btrfs_free_clusters for this block group.
750 * Today it will only have one thing on it, but that may change
752 struct list_head cluster_list
;
755 struct reloc_control
;
757 struct btrfs_fs_devices
;
758 struct btrfs_fs_info
{
759 u8 fsid
[BTRFS_FSID_SIZE
];
760 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
761 struct btrfs_root
*extent_root
;
762 struct btrfs_root
*tree_root
;
763 struct btrfs_root
*chunk_root
;
764 struct btrfs_root
*dev_root
;
765 struct btrfs_root
*fs_root
;
766 struct btrfs_root
*csum_root
;
768 /* the log root tree is a directory of all the other log roots */
769 struct btrfs_root
*log_root_tree
;
770 struct radix_tree_root fs_roots_radix
;
772 /* block group cache stuff */
773 spinlock_t block_group_cache_lock
;
774 struct rb_root block_group_cache_tree
;
776 struct extent_io_tree pinned_extents
;
778 /* logical->physical extent mapping */
779 struct btrfs_mapping_tree mapping_tree
;
782 u64 last_trans_committed
;
785 * this is updated to the current trans every time a full commit
786 * is required instead of the faster short fsync log commits
788 u64 last_trans_log_full_commit
;
789 u64 open_ioctl_trans
;
790 unsigned long mount_opt
;
794 struct btrfs_transaction
*running_transaction
;
795 wait_queue_head_t transaction_throttle
;
796 wait_queue_head_t transaction_wait
;
797 wait_queue_head_t async_submit_wait
;
799 struct btrfs_super_block super_copy
;
800 struct btrfs_super_block super_for_commit
;
801 struct block_device
*__bdev
;
802 struct super_block
*sb
;
803 struct inode
*btree_inode
;
804 struct backing_dev_info bdi
;
805 struct mutex trans_mutex
;
806 struct mutex tree_log_mutex
;
807 struct mutex transaction_kthread_mutex
;
808 struct mutex cleaner_mutex
;
809 struct mutex chunk_mutex
;
810 struct mutex drop_mutex
;
811 struct mutex volume_mutex
;
812 struct mutex tree_reloc_mutex
;
815 * this protects the ordered operations list only while we are
816 * processing all of the entries on it. This way we make
817 * sure the commit code doesn't find the list temporarily empty
818 * because another function happens to be doing non-waiting preflush
819 * before jumping into the main commit.
821 struct mutex ordered_operations_mutex
;
823 struct list_head trans_list
;
824 struct list_head hashers
;
825 struct list_head dead_roots
;
827 atomic_t nr_async_submits
;
828 atomic_t async_submit_draining
;
829 atomic_t nr_async_bios
;
830 atomic_t async_delalloc_pages
;
833 * this is used by the balancing code to wait for all the pending
836 spinlock_t ordered_extent_lock
;
839 * all of the data=ordered extents pending writeback
840 * these can span multiple transactions and basically include
841 * every dirty data page that isn't from nodatacow
843 struct list_head ordered_extents
;
846 * all of the inodes that have delalloc bytes. It is possible for
847 * this list to be empty even when there is still dirty data=ordered
848 * extents waiting to finish IO.
850 struct list_head delalloc_inodes
;
853 * special rename and truncate targets that must be on disk before
854 * we're allowed to commit. This is basically the ext3 style
857 struct list_head ordered_operations
;
860 * there is a pool of worker threads for checksumming during writes
861 * and a pool for checksumming after reads. This is because readers
862 * can run with FS locks held, and the writers may be waiting for
863 * those locks. We don't want ordering in the pending list to cause
864 * deadlocks, and so the two are serviced separately.
866 * A third pool does submit_bio to avoid deadlocking with the other
869 struct btrfs_workers workers
;
870 struct btrfs_workers delalloc_workers
;
871 struct btrfs_workers endio_workers
;
872 struct btrfs_workers endio_meta_workers
;
873 struct btrfs_workers endio_meta_write_workers
;
874 struct btrfs_workers endio_write_workers
;
875 struct btrfs_workers submit_workers
;
877 * fixup workers take dirty pages that didn't properly go through
878 * the cow mechanism and make them safe to write. It happens
879 * for the sys_munmap function call path
881 struct btrfs_workers fixup_workers
;
882 struct task_struct
*transaction_kthread
;
883 struct task_struct
*cleaner_kthread
;
884 int thread_pool_size
;
886 struct kobject super_kobj
;
887 struct completion kobj_unregister
;
890 int log_root_recovering
;
894 /* protected by the delalloc lock, used to keep from writing
895 * metadata until there is a nice batch
897 u64 dirty_metadata_bytes
;
898 struct list_head dirty_cowonly_roots
;
900 struct btrfs_fs_devices
*fs_devices
;
903 * the space_info list is almost entirely read only. It only changes
904 * when we add a new raid type to the FS, and that happens
905 * very rarely. RCU is used to protect it.
907 struct list_head space_info
;
909 struct reloc_control
*reloc_ctl
;
911 spinlock_t delalloc_lock
;
912 spinlock_t new_trans_lock
;
915 /* data_alloc_cluster is only used in ssd mode */
916 struct btrfs_free_cluster data_alloc_cluster
;
918 /* all metadata allocations go through this cluster */
919 struct btrfs_free_cluster meta_alloc_cluster
;
921 spinlock_t ref_cache_lock
;
922 u64 total_ref_cache_size
;
924 u64 avail_data_alloc_bits
;
925 u64 avail_metadata_alloc_bits
;
926 u64 avail_system_alloc_bits
;
927 u64 data_alloc_profile
;
928 u64 metadata_alloc_profile
;
929 u64 system_alloc_profile
;
931 unsigned data_chunk_allocations
;
932 unsigned metadata_ratio
;
938 * in ram representation of the tree. extent_root is used for all allocations
939 * and for the extent tree extent_root root.
942 struct extent_buffer
*node
;
944 /* the node lock is held while changing the node pointer */
945 spinlock_t node_lock
;
947 struct extent_buffer
*commit_root
;
948 struct btrfs_root
*log_root
;
949 struct btrfs_root
*reloc_root
;
951 struct btrfs_root_item root_item
;
952 struct btrfs_key root_key
;
953 struct btrfs_fs_info
*fs_info
;
954 struct extent_io_tree dirty_log_pages
;
956 struct kobject root_kobj
;
957 struct completion kobj_unregister
;
958 struct mutex objectid_mutex
;
960 struct mutex log_mutex
;
961 wait_queue_head_t log_writer_wait
;
962 wait_queue_head_t log_commit_wait
[2];
963 atomic_t log_writers
;
964 atomic_t log_commit
[2];
965 unsigned long log_transid
;
966 unsigned long log_batch
;
971 /* data allocations are done in sectorsize units */
974 /* node allocations are done in nodesize units */
977 /* leaf allocations are done in leafsize units */
984 u64 last_inode_alloc
;
987 u64 defrag_trans_start
;
988 struct btrfs_key defrag_progress
;
989 struct btrfs_key defrag_max
;
995 /* the dirty list is only used by non-reference counted roots */
996 struct list_head dirty_list
;
998 struct list_head root_list
;
1000 spinlock_t list_lock
;
1001 struct list_head orphan_list
;
1003 spinlock_t inode_lock
;
1004 /* red-black tree that keeps track of in-memory inodes */
1005 struct rb_root inode_tree
;
1008 * right now this just gets used so that a root has its own devid
1009 * for stat. It may be used for more later
1011 struct super_block anon_super
;
1015 * inode items have the data typically returned from stat and store other
1016 * info about object characteristics. There is one for every file and dir in
1019 #define BTRFS_INODE_ITEM_KEY 1
1020 #define BTRFS_INODE_REF_KEY 12
1021 #define BTRFS_XATTR_ITEM_KEY 24
1022 #define BTRFS_ORPHAN_ITEM_KEY 48
1023 /* reserve 2-15 close to the inode for later flexibility */
1026 * dir items are the name -> inode pointers in a directory. There is one
1027 * for every name in a directory.
1029 #define BTRFS_DIR_LOG_ITEM_KEY 60
1030 #define BTRFS_DIR_LOG_INDEX_KEY 72
1031 #define BTRFS_DIR_ITEM_KEY 84
1032 #define BTRFS_DIR_INDEX_KEY 96
1034 * extent data is for file data
1036 #define BTRFS_EXTENT_DATA_KEY 108
1039 * extent csums are stored in a separate tree and hold csums for
1040 * an entire extent on disk.
1042 #define BTRFS_EXTENT_CSUM_KEY 128
1045 * root items point to tree roots. They are typically in the root
1046 * tree used by the super block to find all the other trees
1048 #define BTRFS_ROOT_ITEM_KEY 132
1051 * root backrefs tie subvols and snapshots to the directory entries that
1054 #define BTRFS_ROOT_BACKREF_KEY 144
1057 * root refs make a fast index for listing all of the snapshots and
1058 * subvolumes referenced by a given root. They point directly to the
1059 * directory item in the root that references the subvol
1061 #define BTRFS_ROOT_REF_KEY 156
1064 * extent items are in the extent map tree. These record which blocks
1065 * are used, and how many references there are to each block
1067 #define BTRFS_EXTENT_ITEM_KEY 168
1069 #define BTRFS_TREE_BLOCK_REF_KEY 176
1071 #define BTRFS_EXTENT_DATA_REF_KEY 178
1073 #define BTRFS_EXTENT_REF_V0_KEY 180
1075 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1077 #define BTRFS_SHARED_DATA_REF_KEY 184
1080 * block groups give us hints into the extent allocation trees. Which
1081 * blocks are free etc etc
1083 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1085 #define BTRFS_DEV_EXTENT_KEY 204
1086 #define BTRFS_DEV_ITEM_KEY 216
1087 #define BTRFS_CHUNK_ITEM_KEY 228
1090 * string items are for debugging. They just store a short string of
1093 #define BTRFS_STRING_ITEM_KEY 253
1095 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1096 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1097 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1098 #define BTRFS_MOUNT_SSD (1 << 3)
1099 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1100 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1101 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1102 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1104 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1105 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1106 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1111 #define BTRFS_INODE_NODATASUM (1 << 0)
1112 #define BTRFS_INODE_NODATACOW (1 << 1)
1113 #define BTRFS_INODE_READONLY (1 << 2)
1114 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1115 #define BTRFS_INODE_PREALLOC (1 << 4)
1116 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
1117 ~BTRFS_INODE_##flag)
1118 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
1120 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
1122 /* some macros to generate set/get funcs for the struct fields. This
1123 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1126 #define le8_to_cpu(v) (v)
1127 #define cpu_to_le8(v) (v)
1130 #define read_eb_member(eb, ptr, type, member, result) ( \
1131 read_extent_buffer(eb, (char *)(result), \
1132 ((unsigned long)(ptr)) + \
1133 offsetof(type, member), \
1134 sizeof(((type *)0)->member)))
1136 #define write_eb_member(eb, ptr, type, member, result) ( \
1137 write_extent_buffer(eb, (char *)(result), \
1138 ((unsigned long)(ptr)) + \
1139 offsetof(type, member), \
1140 sizeof(((type *)0)->member)))
1142 #ifndef BTRFS_SETGET_FUNCS
1143 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1144 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1145 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1148 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1149 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1151 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1152 u##bits res = le##bits##_to_cpu(p->member); \
1153 kunmap_atomic(p, KM_USER0); \
1156 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1159 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1160 p->member = cpu_to_le##bits(val); \
1161 kunmap_atomic(p, KM_USER0); \
1164 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1165 static inline u##bits btrfs_##name(type *s) \
1167 return le##bits##_to_cpu(s->member); \
1169 static inline void btrfs_set_##name(type *s, u##bits val) \
1171 s->member = cpu_to_le##bits(val); \
1174 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1175 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1176 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1177 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1178 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1179 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1181 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1182 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1183 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1184 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1185 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1186 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1188 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1189 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1191 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1193 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1195 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1197 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1199 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1200 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1202 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1204 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1206 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1209 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1211 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1214 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1216 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1219 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1220 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1221 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1222 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1223 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1224 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1225 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1226 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1227 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1228 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1229 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1231 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1233 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1236 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1237 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1238 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1240 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1242 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1244 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1246 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1247 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1249 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1251 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1252 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1254 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1257 unsigned long offset
= (unsigned long)c
;
1258 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1259 offset
+= nr
* sizeof(struct btrfs_stripe
);
1260 return (struct btrfs_stripe
*)offset
;
1263 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1265 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1268 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1269 struct btrfs_chunk
*c
, int nr
)
1271 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1274 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1275 struct btrfs_chunk
*c
, int nr
,
1278 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1281 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1282 struct btrfs_chunk
*c
, int nr
)
1284 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1287 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1288 struct btrfs_chunk
*c
, int nr
,
1291 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1294 /* struct btrfs_block_group_item */
1295 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1297 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1299 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1300 struct btrfs_block_group_item
, chunk_objectid
, 64);
1302 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1303 struct btrfs_block_group_item
, chunk_objectid
, 64);
1304 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1305 struct btrfs_block_group_item
, flags
, 64);
1306 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1307 struct btrfs_block_group_item
, flags
, 64);
1309 /* struct btrfs_inode_ref */
1310 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1311 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1313 /* struct btrfs_inode_item */
1314 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1315 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1316 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1317 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1318 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1319 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1320 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1321 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1322 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1323 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1324 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1325 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1327 static inline struct btrfs_timespec
*
1328 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1330 unsigned long ptr
= (unsigned long)inode_item
;
1331 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1332 return (struct btrfs_timespec
*)ptr
;
1335 static inline struct btrfs_timespec
*
1336 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1338 unsigned long ptr
= (unsigned long)inode_item
;
1339 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1340 return (struct btrfs_timespec
*)ptr
;
1343 static inline struct btrfs_timespec
*
1344 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1346 unsigned long ptr
= (unsigned long)inode_item
;
1347 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1348 return (struct btrfs_timespec
*)ptr
;
1351 static inline struct btrfs_timespec
*
1352 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1354 unsigned long ptr
= (unsigned long)inode_item
;
1355 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1356 return (struct btrfs_timespec
*)ptr
;
1359 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1360 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1362 /* struct btrfs_dev_extent */
1363 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1365 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1366 chunk_objectid
, 64);
1367 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1369 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1371 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1373 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1374 return (u8
*)((unsigned long)dev
+ ptr
);
1377 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1378 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1380 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1382 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1385 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1387 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1388 struct btrfs_tree_block_info
*item
,
1389 struct btrfs_disk_key
*key
)
1391 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1394 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1395 struct btrfs_tree_block_info
*item
,
1396 struct btrfs_disk_key
*key
)
1398 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1401 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1403 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1405 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1407 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1410 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1413 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1415 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1418 static inline u32
btrfs_extent_inline_ref_size(int type
)
1420 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1421 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1422 return sizeof(struct btrfs_extent_inline_ref
);
1423 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1424 return sizeof(struct btrfs_shared_data_ref
) +
1425 sizeof(struct btrfs_extent_inline_ref
);
1426 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1427 return sizeof(struct btrfs_extent_data_ref
) +
1428 offsetof(struct btrfs_extent_inline_ref
, offset
);
1433 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1434 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1436 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1437 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1439 /* struct btrfs_node */
1440 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1441 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1443 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1446 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1447 sizeof(struct btrfs_key_ptr
) * nr
;
1448 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1451 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1455 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1456 sizeof(struct btrfs_key_ptr
) * nr
;
1457 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1460 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1463 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1464 sizeof(struct btrfs_key_ptr
) * nr
;
1465 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1468 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1472 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1473 sizeof(struct btrfs_key_ptr
) * nr
;
1474 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1477 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1479 return offsetof(struct btrfs_node
, ptrs
) +
1480 sizeof(struct btrfs_key_ptr
) * nr
;
1483 void btrfs_node_key(struct extent_buffer
*eb
,
1484 struct btrfs_disk_key
*disk_key
, int nr
);
1486 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1487 struct btrfs_disk_key
*disk_key
, int nr
)
1490 ptr
= btrfs_node_key_ptr_offset(nr
);
1491 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1492 struct btrfs_key_ptr
, key
, disk_key
);
1495 /* struct btrfs_item */
1496 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1497 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1499 static inline unsigned long btrfs_item_nr_offset(int nr
)
1501 return offsetof(struct btrfs_leaf
, items
) +
1502 sizeof(struct btrfs_item
) * nr
;
1505 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1508 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1511 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1512 struct btrfs_item
*item
)
1514 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1517 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1519 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1522 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1524 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1527 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1529 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1532 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1533 struct btrfs_disk_key
*disk_key
, int nr
)
1535 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1536 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1539 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1540 struct btrfs_disk_key
*disk_key
, int nr
)
1542 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1543 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1546 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1549 * struct btrfs_root_ref
1551 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1552 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1553 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1555 /* struct btrfs_dir_item */
1556 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1557 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1558 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1559 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1561 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1562 struct btrfs_dir_item
*item
,
1563 struct btrfs_disk_key
*key
)
1565 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1568 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1569 struct btrfs_dir_item
*item
,
1570 struct btrfs_disk_key
*key
)
1572 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1575 /* struct btrfs_disk_key */
1576 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1578 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1579 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1581 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1582 struct btrfs_disk_key
*disk
)
1584 cpu
->offset
= le64_to_cpu(disk
->offset
);
1585 cpu
->type
= disk
->type
;
1586 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1589 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1590 struct btrfs_key
*cpu
)
1592 disk
->offset
= cpu_to_le64(cpu
->offset
);
1593 disk
->type
= cpu
->type
;
1594 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1597 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1598 struct btrfs_key
*key
, int nr
)
1600 struct btrfs_disk_key disk_key
;
1601 btrfs_node_key(eb
, &disk_key
, nr
);
1602 btrfs_disk_key_to_cpu(key
, &disk_key
);
1605 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1606 struct btrfs_key
*key
, int nr
)
1608 struct btrfs_disk_key disk_key
;
1609 btrfs_item_key(eb
, &disk_key
, nr
);
1610 btrfs_disk_key_to_cpu(key
, &disk_key
);
1613 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1614 struct btrfs_dir_item
*item
,
1615 struct btrfs_key
*key
)
1617 struct btrfs_disk_key disk_key
;
1618 btrfs_dir_item_key(eb
, item
, &disk_key
);
1619 btrfs_disk_key_to_cpu(key
, &disk_key
);
1623 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1628 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1633 /* struct btrfs_header */
1634 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1635 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1637 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1638 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1639 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1640 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1642 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1644 return (btrfs_header_flags(eb
) & flag
) == flag
;
1647 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1649 u64 flags
= btrfs_header_flags(eb
);
1650 btrfs_set_header_flags(eb
, flags
| flag
);
1651 return (flags
& flag
) == flag
;
1654 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1656 u64 flags
= btrfs_header_flags(eb
);
1657 btrfs_set_header_flags(eb
, flags
& ~flag
);
1658 return (flags
& flag
) == flag
;
1661 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1663 u64 flags
= btrfs_header_flags(eb
);
1664 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1667 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1670 u64 flags
= btrfs_header_flags(eb
);
1671 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1672 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1673 btrfs_set_header_flags(eb
, flags
);
1676 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1678 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1682 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1684 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1688 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1690 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1694 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1696 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1700 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1705 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1710 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1715 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1717 return btrfs_header_level(eb
) == 0;
1720 /* struct btrfs_root_item */
1721 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1723 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1724 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1725 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1727 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1729 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1730 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1731 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1732 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1733 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1734 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1735 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1736 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1739 /* struct btrfs_super_block */
1741 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1742 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1743 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1745 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1746 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1747 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1748 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1749 struct btrfs_super_block
, chunk_root_generation
, 64);
1750 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1752 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1754 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1755 chunk_root_level
, 8);
1756 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1758 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1759 log_root_transid
, 64);
1760 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1762 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1764 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1766 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1768 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1770 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1772 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1774 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1775 root_dir_objectid
, 64);
1776 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1778 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1780 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1782 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1783 incompat_flags
, 64);
1784 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1787 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1789 int t
= btrfs_super_csum_type(s
);
1790 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1791 return btrfs_csum_sizes
[t
];
1794 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1796 return offsetof(struct btrfs_leaf
, items
);
1799 /* struct btrfs_file_extent_item */
1800 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1802 static inline unsigned long
1803 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
1805 unsigned long offset
= (unsigned long)e
;
1806 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1810 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1812 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1815 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1817 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1819 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1820 disk_num_bytes
, 64);
1821 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1823 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1825 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1827 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1829 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1831 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1832 other_encoding
, 16);
1834 /* this returns the number of file bytes represented by the inline item.
1835 * If an item is compressed, this is the uncompressed size
1837 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1838 struct btrfs_file_extent_item
*e
)
1840 return btrfs_file_extent_ram_bytes(eb
, e
);
1844 * this returns the number of bytes used by the item on disk, minus the
1845 * size of any extent headers. If a file is compressed on disk, this is
1846 * the compressed size
1848 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1849 struct btrfs_item
*e
)
1851 unsigned long offset
;
1852 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1853 return btrfs_item_size(eb
, e
) - offset
;
1856 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1858 return sb
->s_fs_info
;
1861 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1862 const char *name
, int len
)
1864 /* if we already have a name just free it */
1867 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1871 memcpy(root
->name
, name
, len
);
1872 root
->name
[len
] = '\0';
1877 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
1880 return root
->leafsize
;
1881 return root
->nodesize
;
1884 /* helper function to cast into the data area of the leaf. */
1885 #define btrfs_item_ptr(leaf, slot, type) \
1886 ((type *)(btrfs_leaf_data(leaf) + \
1887 btrfs_item_offset_nr(leaf, slot)))
1889 #define btrfs_item_ptr_offset(leaf, slot) \
1890 ((unsigned long)(btrfs_leaf_data(leaf) + \
1891 btrfs_item_offset_nr(leaf, slot)))
1893 static inline struct dentry
*fdentry(struct file
*file
)
1895 return file
->f_path
.dentry
;
1899 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
1900 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
1901 struct btrfs_root
*root
, unsigned long count
);
1902 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1903 int btrfs_update_pinned_extents(struct btrfs_root
*root
,
1904 u64 bytenr
, u64 num
, int pin
);
1905 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
1906 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1907 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
1908 struct btrfs_root
*root
,
1909 u64 objectid
, u64 offset
, u64 bytenr
);
1910 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1911 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
1912 struct btrfs_fs_info
*info
,
1914 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
1915 u64
btrfs_find_block_group(struct btrfs_root
*root
,
1916 u64 search_start
, u64 search_hint
, int owner
);
1917 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1918 struct btrfs_root
*root
, u32 blocksize
,
1919 u64 parent
, u64 root_objectid
,
1920 struct btrfs_disk_key
*key
, int level
,
1921 u64 hint
, u64 empty_size
);
1922 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
1923 struct btrfs_root
*root
,
1924 u64 bytenr
, u32 blocksize
,
1926 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
1927 struct btrfs_root
*root
,
1928 u64 root_objectid
, u64 owner
,
1929 u64 offset
, struct btrfs_key
*ins
);
1930 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
1931 struct btrfs_root
*root
,
1932 u64 root_objectid
, u64 owner
, u64 offset
,
1933 struct btrfs_key
*ins
);
1934 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
1935 struct btrfs_root
*root
,
1936 u64 num_bytes
, u64 min_alloc_size
,
1937 u64 empty_size
, u64 hint_byte
,
1938 u64 search_end
, struct btrfs_key
*ins
,
1940 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1941 struct extent_buffer
*buf
, int full_backref
);
1942 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1943 struct extent_buffer
*buf
, int full_backref
);
1944 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
1945 struct btrfs_root
*root
,
1946 u64 bytenr
, u64 num_bytes
, u64 flags
,
1948 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
1949 struct btrfs_root
*root
,
1950 u64 bytenr
, u64 num_bytes
, u64 parent
,
1951 u64 root_objectid
, u64 owner
, u64 offset
);
1953 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1954 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1955 struct btrfs_root
*root
,
1956 struct extent_io_tree
*unpin
);
1957 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1958 struct btrfs_root
*root
,
1959 u64 bytenr
, u64 num_bytes
, u64 parent
,
1960 u64 root_objectid
, u64 owner
, u64 offset
);
1962 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1963 struct btrfs_root
*root
);
1964 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
1965 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1966 int btrfs_read_block_groups(struct btrfs_root
*root
);
1967 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1968 struct btrfs_root
*root
, u64 bytes_used
,
1969 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1971 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
1972 struct btrfs_root
*root
, u64 group_start
);
1973 int btrfs_prepare_block_group_relocation(struct btrfs_root
*root
,
1974 struct btrfs_block_group_cache
*group
);
1976 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
1977 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
1978 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
1980 int btrfs_check_metadata_free_space(struct btrfs_root
*root
);
1981 int btrfs_check_data_free_space(struct btrfs_root
*root
, struct inode
*inode
,
1983 void btrfs_free_reserved_data_space(struct btrfs_root
*root
,
1984 struct inode
*inode
, u64 bytes
);
1985 void btrfs_delalloc_reserve_space(struct btrfs_root
*root
, struct inode
*inode
,
1987 void btrfs_delalloc_free_space(struct btrfs_root
*root
, struct inode
*inode
,
1990 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
1991 int level
, int *slot
);
1992 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
1993 int btrfs_previous_item(struct btrfs_root
*root
,
1994 struct btrfs_path
*path
, u64 min_objectid
,
1996 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1997 struct btrfs_root
*root
, struct btrfs_path
*path
,
1998 struct btrfs_key
*new_key
);
1999 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2000 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2001 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2002 struct btrfs_key
*key
, int lowest_level
,
2003 int cache_only
, u64 min_trans
);
2004 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2005 struct btrfs_key
*max_key
,
2006 struct btrfs_path
*path
, int cache_only
,
2008 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2009 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2010 struct extent_buffer
*parent
, int parent_slot
,
2011 struct extent_buffer
**cow_ret
);
2012 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2013 struct btrfs_root
*root
,
2014 struct extent_buffer
*buf
,
2015 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2016 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2017 struct extent_buffer
*buf
);
2018 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2019 *root
, struct btrfs_path
*path
, u32 data_size
);
2020 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2021 struct btrfs_root
*root
,
2022 struct btrfs_path
*path
,
2023 u32 new_size
, int from_end
);
2024 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2025 struct btrfs_root
*root
,
2026 struct btrfs_path
*path
,
2027 struct btrfs_key
*new_key
,
2028 unsigned long split_offset
);
2029 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2030 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2032 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2033 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2034 int start_slot
, int cache_only
, u64
*last_ret
,
2035 struct btrfs_key
*progress
);
2036 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
2037 struct btrfs_path
*btrfs_alloc_path(void);
2038 void btrfs_free_path(struct btrfs_path
*p
);
2039 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2040 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2042 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2043 struct btrfs_path
*path
, int slot
, int nr
);
2044 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2045 struct btrfs_root
*root
,
2046 struct btrfs_path
*path
)
2048 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2051 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2052 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2053 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
2054 struct btrfs_root
*root
,
2055 struct btrfs_path
*path
,
2056 struct btrfs_key
*cpu_key
, u32
*data_size
,
2058 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2059 struct btrfs_root
*root
,
2060 struct btrfs_path
*path
,
2061 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2063 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2064 struct btrfs_root
*root
,
2065 struct btrfs_path
*path
,
2066 struct btrfs_key
*key
,
2069 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2072 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2073 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2074 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2075 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2077 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2078 struct btrfs_root
*root
,
2079 struct extent_buffer
*node
,
2080 struct extent_buffer
*parent
);
2082 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2083 struct btrfs_path
*path
,
2084 u64 root_id
, u64 ref_id
);
2085 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2086 struct btrfs_root
*tree_root
,
2087 u64 root_id
, u8 type
, u64 ref_id
,
2088 u64 dirid
, u64 sequence
,
2089 const char *name
, int name_len
);
2090 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2091 struct btrfs_key
*key
);
2092 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2093 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2095 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2096 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2098 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2099 btrfs_root_item
*item
, struct btrfs_key
*key
);
2100 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
2101 u64
*found_objectid
);
2102 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2103 int btrfs_set_root_node(struct btrfs_root_item
*item
,
2104 struct extent_buffer
*node
);
2106 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2107 struct btrfs_root
*root
, const char *name
,
2108 int name_len
, u64 dir
,
2109 struct btrfs_key
*location
, u8 type
, u64 index
);
2110 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2111 struct btrfs_root
*root
,
2112 struct btrfs_path
*path
, u64 dir
,
2113 const char *name
, int name_len
,
2115 struct btrfs_dir_item
*
2116 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2117 struct btrfs_root
*root
,
2118 struct btrfs_path
*path
, u64 dir
,
2119 u64 objectid
, const char *name
, int name_len
,
2121 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2122 struct btrfs_path
*path
,
2123 const char *name
, int name_len
);
2124 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2125 struct btrfs_root
*root
,
2126 struct btrfs_path
*path
,
2127 struct btrfs_dir_item
*di
);
2128 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2129 struct btrfs_root
*root
, const char *name
,
2130 u16 name_len
, const void *data
, u16 data_len
,
2132 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2133 struct btrfs_root
*root
,
2134 struct btrfs_path
*path
, u64 dir
,
2135 const char *name
, u16 name_len
,
2139 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2140 struct btrfs_root
*root
, u64 offset
);
2141 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2142 struct btrfs_root
*root
, u64 offset
);
2145 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2146 struct btrfs_root
*fs_root
,
2147 u64 dirid
, u64
*objectid
);
2148 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2151 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2152 struct btrfs_root
*root
,
2153 const char *name
, int name_len
,
2154 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2155 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2156 struct btrfs_root
*root
,
2157 const char *name
, int name_len
,
2158 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2159 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2160 struct btrfs_root
*root
,
2161 struct btrfs_path
*path
, u64 objectid
);
2162 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2163 *root
, struct btrfs_path
*path
,
2164 struct btrfs_key
*location
, int mod
);
2167 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2168 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2169 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2170 struct bio
*bio
, u32
*dst
);
2171 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2172 struct btrfs_root
*root
,
2173 u64 objectid
, u64 pos
,
2174 u64 disk_offset
, u64 disk_num_bytes
,
2175 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2176 u8 compression
, u8 encryption
, u16 other_encoding
);
2177 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2178 struct btrfs_root
*root
,
2179 struct btrfs_path
*path
, u64 objectid
,
2180 u64 bytenr
, int mod
);
2181 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2182 struct btrfs_root
*root
,
2183 struct btrfs_ordered_sum
*sums
);
2184 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2185 struct bio
*bio
, u64 file_start
, int contig
);
2186 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
2187 u64 start
, unsigned long len
);
2188 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2189 struct btrfs_root
*root
,
2190 struct btrfs_path
*path
,
2191 u64 bytenr
, int cow
);
2192 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2193 struct btrfs_root
*root
, struct btrfs_path
*path
,
2195 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
2196 u64 end
, struct list_head
*list
);
2199 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2200 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2201 #define ClearPageChecked ClearPageFsMisc
2202 #define SetPageChecked SetPageFsMisc
2203 #define PageChecked PageFsMisc
2206 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2207 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2208 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2209 struct btrfs_root
*root
,
2210 struct inode
*dir
, struct inode
*inode
,
2211 const char *name
, int name_len
);
2212 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2213 struct inode
*parent_inode
, struct inode
*inode
,
2214 const char *name
, int name_len
, int add_backref
, u64 index
);
2215 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2216 struct btrfs_root
*root
,
2217 struct inode
*inode
, u64 new_size
,
2220 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
);
2221 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
);
2222 int btrfs_writepages(struct address_space
*mapping
,
2223 struct writeback_control
*wbc
);
2224 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2225 struct btrfs_root
*new_root
, struct dentry
*dentry
,
2226 u64 new_dirid
, u64 alloc_hint
);
2227 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2228 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2230 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2231 struct file_ra_state
*ra
, struct file
*file
,
2232 pgoff_t offset
, pgoff_t last_index
);
2233 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2234 int btrfs_readpage(struct file
*file
, struct page
*page
);
2235 void btrfs_delete_inode(struct inode
*inode
);
2236 void btrfs_put_inode(struct inode
*inode
);
2237 int btrfs_write_inode(struct inode
*inode
, int wait
);
2238 void btrfs_dirty_inode(struct inode
*inode
);
2239 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2240 void btrfs_destroy_inode(struct inode
*inode
);
2241 int btrfs_init_cachep(void);
2242 void btrfs_destroy_cachep(void);
2243 long btrfs_ioctl_trans_end(struct file
*file
);
2244 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2245 struct btrfs_root
*root
);
2246 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2247 unsigned from
, unsigned to
);
2248 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2249 size_t page_offset
, u64 start
, u64 end
,
2251 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2252 struct btrfs_root
*root
,
2253 struct inode
*inode
);
2254 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2255 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2256 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
2257 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
2260 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2263 int btrfs_sync_file(struct file
*file
, struct dentry
*dentry
, int datasync
);
2264 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2266 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2267 extern struct file_operations btrfs_file_operations
;
2268 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
2269 struct btrfs_root
*root
, struct inode
*inode
,
2270 u64 start
, u64 end
, u64 locked_end
,
2271 u64 inline_limit
, u64
*hint_block
);
2272 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2273 struct btrfs_root
*root
,
2274 struct inode
*inode
, u64 start
, u64 end
);
2275 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2278 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2279 struct btrfs_root
*root
, int cache_only
);
2282 int btrfs_init_sysfs(void);
2283 void btrfs_exit_sysfs(void);
2284 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2285 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2286 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2287 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2290 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2293 u64
btrfs_parse_size(char *str
);
2294 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2295 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2298 int btrfs_check_acl(struct inode
*inode
, int mask
);
2299 int btrfs_init_acl(struct inode
*inode
, struct inode
*dir
);
2300 int btrfs_acl_chmod(struct inode
*inode
);
2303 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
2304 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
2305 struct btrfs_root
*root
);
2306 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
2307 struct btrfs_root
*root
);
2308 int btrfs_recover_relocation(struct btrfs_root
*root
);
2309 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);