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
;
694 atomic_t caching_threads
;
698 * free clusters are used to claim free space in relatively large chunks,
699 * allowing us to do less seeky writes. They are used for all metadata
700 * allocations and data allocations in ssd mode.
702 struct btrfs_free_cluster
{
704 spinlock_t refill_lock
;
707 /* largest extent in this cluster */
710 /* first extent starting offset */
713 /* if this cluster simply points at a bitmap in the block group */
714 bool points_to_bitmap
;
716 struct btrfs_block_group_cache
*block_group
;
718 * when a cluster is allocated from a block group, we put the
719 * cluster onto a list in the block group so that it can
720 * be freed before the block group is freed.
722 struct list_head block_group_list
;
725 enum btrfs_caching_type
{
727 BTRFS_CACHE_STARTED
= 1,
728 BTRFS_CACHE_FINISHED
= 2,
731 struct btrfs_block_group_cache
{
732 struct btrfs_key key
;
733 struct btrfs_block_group_item item
;
734 struct btrfs_fs_info
*fs_info
;
746 /* cache tracking stuff */
747 wait_queue_head_t caching_q
;
750 struct btrfs_space_info
*space_info
;
752 /* free space cache stuff */
753 spinlock_t tree_lock
;
754 struct rb_root free_space_offset
;
757 /* block group cache stuff */
758 struct rb_node cache_node
;
760 /* for block groups in the same raid type */
761 struct list_head list
;
766 /* List of struct btrfs_free_clusters for this block group.
767 * Today it will only have one thing on it, but that may change
769 struct list_head cluster_list
;
772 struct reloc_control
;
774 struct btrfs_fs_devices
;
775 struct btrfs_fs_info
{
776 u8 fsid
[BTRFS_FSID_SIZE
];
777 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
778 struct btrfs_root
*extent_root
;
779 struct btrfs_root
*tree_root
;
780 struct btrfs_root
*chunk_root
;
781 struct btrfs_root
*dev_root
;
782 struct btrfs_root
*fs_root
;
783 struct btrfs_root
*csum_root
;
785 /* the log root tree is a directory of all the other log roots */
786 struct btrfs_root
*log_root_tree
;
787 struct radix_tree_root fs_roots_radix
;
789 /* block group cache stuff */
790 spinlock_t block_group_cache_lock
;
791 struct rb_root block_group_cache_tree
;
793 struct extent_io_tree pinned_extents
;
795 /* logical->physical extent mapping */
796 struct btrfs_mapping_tree mapping_tree
;
799 u64 last_trans_committed
;
802 * this is updated to the current trans every time a full commit
803 * is required instead of the faster short fsync log commits
805 u64 last_trans_log_full_commit
;
806 u64 open_ioctl_trans
;
807 unsigned long mount_opt
;
811 struct btrfs_transaction
*running_transaction
;
812 wait_queue_head_t transaction_throttle
;
813 wait_queue_head_t transaction_wait
;
814 wait_queue_head_t async_submit_wait
;
816 struct btrfs_super_block super_copy
;
817 struct btrfs_super_block super_for_commit
;
818 struct block_device
*__bdev
;
819 struct super_block
*sb
;
820 struct inode
*btree_inode
;
821 struct backing_dev_info bdi
;
822 struct mutex trans_mutex
;
823 struct mutex tree_log_mutex
;
824 struct mutex transaction_kthread_mutex
;
825 struct mutex cleaner_mutex
;
826 struct mutex chunk_mutex
;
827 struct mutex drop_mutex
;
828 struct mutex volume_mutex
;
829 struct mutex tree_reloc_mutex
;
832 * this protects the ordered operations list only while we are
833 * processing all of the entries on it. This way we make
834 * sure the commit code doesn't find the list temporarily empty
835 * because another function happens to be doing non-waiting preflush
836 * before jumping into the main commit.
838 struct mutex ordered_operations_mutex
;
840 struct list_head trans_list
;
841 struct list_head hashers
;
842 struct list_head dead_roots
;
844 atomic_t nr_async_submits
;
845 atomic_t async_submit_draining
;
846 atomic_t nr_async_bios
;
847 atomic_t async_delalloc_pages
;
848 atomic_t async_caching_threads
;
851 * this is used by the balancing code to wait for all the pending
854 spinlock_t ordered_extent_lock
;
857 * all of the data=ordered extents pending writeback
858 * these can span multiple transactions and basically include
859 * every dirty data page that isn't from nodatacow
861 struct list_head ordered_extents
;
864 * all of the inodes that have delalloc bytes. It is possible for
865 * this list to be empty even when there is still dirty data=ordered
866 * extents waiting to finish IO.
868 struct list_head delalloc_inodes
;
871 * special rename and truncate targets that must be on disk before
872 * we're allowed to commit. This is basically the ext3 style
875 struct list_head ordered_operations
;
878 * there is a pool of worker threads for checksumming during writes
879 * and a pool for checksumming after reads. This is because readers
880 * can run with FS locks held, and the writers may be waiting for
881 * those locks. We don't want ordering in the pending list to cause
882 * deadlocks, and so the two are serviced separately.
884 * A third pool does submit_bio to avoid deadlocking with the other
887 struct btrfs_workers workers
;
888 struct btrfs_workers delalloc_workers
;
889 struct btrfs_workers endio_workers
;
890 struct btrfs_workers endio_meta_workers
;
891 struct btrfs_workers endio_meta_write_workers
;
892 struct btrfs_workers endio_write_workers
;
893 struct btrfs_workers submit_workers
;
895 * fixup workers take dirty pages that didn't properly go through
896 * the cow mechanism and make them safe to write. It happens
897 * for the sys_munmap function call path
899 struct btrfs_workers fixup_workers
;
900 struct task_struct
*transaction_kthread
;
901 struct task_struct
*cleaner_kthread
;
902 int thread_pool_size
;
904 struct kobject super_kobj
;
905 struct completion kobj_unregister
;
908 int log_root_recovering
;
912 /* protected by the delalloc lock, used to keep from writing
913 * metadata until there is a nice batch
915 u64 dirty_metadata_bytes
;
916 struct list_head dirty_cowonly_roots
;
918 struct btrfs_fs_devices
*fs_devices
;
921 * the space_info list is almost entirely read only. It only changes
922 * when we add a new raid type to the FS, and that happens
923 * very rarely. RCU is used to protect it.
925 struct list_head space_info
;
927 struct reloc_control
*reloc_ctl
;
929 spinlock_t delalloc_lock
;
930 spinlock_t new_trans_lock
;
933 /* data_alloc_cluster is only used in ssd mode */
934 struct btrfs_free_cluster data_alloc_cluster
;
936 /* all metadata allocations go through this cluster */
937 struct btrfs_free_cluster meta_alloc_cluster
;
939 spinlock_t ref_cache_lock
;
940 u64 total_ref_cache_size
;
942 u64 avail_data_alloc_bits
;
943 u64 avail_metadata_alloc_bits
;
944 u64 avail_system_alloc_bits
;
945 u64 data_alloc_profile
;
946 u64 metadata_alloc_profile
;
947 u64 system_alloc_profile
;
949 unsigned data_chunk_allocations
;
950 unsigned metadata_ratio
;
956 * in ram representation of the tree. extent_root is used for all allocations
957 * and for the extent tree extent_root root.
960 struct extent_buffer
*node
;
962 /* the node lock is held while changing the node pointer */
963 spinlock_t node_lock
;
965 /* taken when updating the commit root */
966 struct rw_semaphore commit_root_sem
;
968 struct extent_buffer
*commit_root
;
969 struct btrfs_root
*log_root
;
970 struct btrfs_root
*reloc_root
;
972 struct btrfs_root_item root_item
;
973 struct btrfs_key root_key
;
974 struct btrfs_fs_info
*fs_info
;
975 struct extent_io_tree dirty_log_pages
;
977 struct kobject root_kobj
;
978 struct completion kobj_unregister
;
979 struct mutex objectid_mutex
;
981 struct mutex log_mutex
;
982 wait_queue_head_t log_writer_wait
;
983 wait_queue_head_t log_commit_wait
[2];
984 atomic_t log_writers
;
985 atomic_t log_commit
[2];
986 unsigned long log_transid
;
987 unsigned long log_batch
;
992 /* data allocations are done in sectorsize units */
995 /* node allocations are done in nodesize units */
998 /* leaf allocations are done in leafsize units */
1005 u64 last_inode_alloc
;
1008 u64 defrag_trans_start
;
1009 struct btrfs_key defrag_progress
;
1010 struct btrfs_key defrag_max
;
1016 /* the dirty list is only used by non-reference counted roots */
1017 struct list_head dirty_list
;
1019 struct list_head root_list
;
1021 spinlock_t list_lock
;
1022 struct list_head orphan_list
;
1024 spinlock_t inode_lock
;
1025 /* red-black tree that keeps track of in-memory inodes */
1026 struct rb_root inode_tree
;
1029 * right now this just gets used so that a root has its own devid
1030 * for stat. It may be used for more later
1032 struct super_block anon_super
;
1036 * inode items have the data typically returned from stat and store other
1037 * info about object characteristics. There is one for every file and dir in
1040 #define BTRFS_INODE_ITEM_KEY 1
1041 #define BTRFS_INODE_REF_KEY 12
1042 #define BTRFS_XATTR_ITEM_KEY 24
1043 #define BTRFS_ORPHAN_ITEM_KEY 48
1044 /* reserve 2-15 close to the inode for later flexibility */
1047 * dir items are the name -> inode pointers in a directory. There is one
1048 * for every name in a directory.
1050 #define BTRFS_DIR_LOG_ITEM_KEY 60
1051 #define BTRFS_DIR_LOG_INDEX_KEY 72
1052 #define BTRFS_DIR_ITEM_KEY 84
1053 #define BTRFS_DIR_INDEX_KEY 96
1055 * extent data is for file data
1057 #define BTRFS_EXTENT_DATA_KEY 108
1060 * extent csums are stored in a separate tree and hold csums for
1061 * an entire extent on disk.
1063 #define BTRFS_EXTENT_CSUM_KEY 128
1066 * root items point to tree roots. They are typically in the root
1067 * tree used by the super block to find all the other trees
1069 #define BTRFS_ROOT_ITEM_KEY 132
1072 * root backrefs tie subvols and snapshots to the directory entries that
1075 #define BTRFS_ROOT_BACKREF_KEY 144
1078 * root refs make a fast index for listing all of the snapshots and
1079 * subvolumes referenced by a given root. They point directly to the
1080 * directory item in the root that references the subvol
1082 #define BTRFS_ROOT_REF_KEY 156
1085 * extent items are in the extent map tree. These record which blocks
1086 * are used, and how many references there are to each block
1088 #define BTRFS_EXTENT_ITEM_KEY 168
1090 #define BTRFS_TREE_BLOCK_REF_KEY 176
1092 #define BTRFS_EXTENT_DATA_REF_KEY 178
1094 #define BTRFS_EXTENT_REF_V0_KEY 180
1096 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1098 #define BTRFS_SHARED_DATA_REF_KEY 184
1101 * block groups give us hints into the extent allocation trees. Which
1102 * blocks are free etc etc
1104 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1106 #define BTRFS_DEV_EXTENT_KEY 204
1107 #define BTRFS_DEV_ITEM_KEY 216
1108 #define BTRFS_CHUNK_ITEM_KEY 228
1111 * string items are for debugging. They just store a short string of
1114 #define BTRFS_STRING_ITEM_KEY 253
1116 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1117 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1118 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1119 #define BTRFS_MOUNT_SSD (1 << 3)
1120 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1121 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1122 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1123 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1124 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1125 #define BTRFS_MOUNT_NOSSD (1 << 9)
1127 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1128 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1129 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1134 #define BTRFS_INODE_NODATASUM (1 << 0)
1135 #define BTRFS_INODE_NODATACOW (1 << 1)
1136 #define BTRFS_INODE_READONLY (1 << 2)
1137 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1138 #define BTRFS_INODE_PREALLOC (1 << 4)
1139 #define BTRFS_INODE_SYNC (1 << 5)
1140 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1141 #define BTRFS_INODE_APPEND (1 << 7)
1142 #define BTRFS_INODE_NODUMP (1 << 8)
1143 #define BTRFS_INODE_NOATIME (1 << 9)
1144 #define BTRFS_INODE_DIRSYNC (1 << 10)
1147 /* some macros to generate set/get funcs for the struct fields. This
1148 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1151 #define le8_to_cpu(v) (v)
1152 #define cpu_to_le8(v) (v)
1155 #define read_eb_member(eb, ptr, type, member, result) ( \
1156 read_extent_buffer(eb, (char *)(result), \
1157 ((unsigned long)(ptr)) + \
1158 offsetof(type, member), \
1159 sizeof(((type *)0)->member)))
1161 #define write_eb_member(eb, ptr, type, member, result) ( \
1162 write_extent_buffer(eb, (char *)(result), \
1163 ((unsigned long)(ptr)) + \
1164 offsetof(type, member), \
1165 sizeof(((type *)0)->member)))
1167 #ifndef BTRFS_SETGET_FUNCS
1168 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1169 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1170 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1173 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1174 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1176 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1177 u##bits res = le##bits##_to_cpu(p->member); \
1178 kunmap_atomic(p, KM_USER0); \
1181 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1184 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1185 p->member = cpu_to_le##bits(val); \
1186 kunmap_atomic(p, KM_USER0); \
1189 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1190 static inline u##bits btrfs_##name(type *s) \
1192 return le##bits##_to_cpu(s->member); \
1194 static inline void btrfs_set_##name(type *s, u##bits val) \
1196 s->member = cpu_to_le##bits(val); \
1199 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1200 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1201 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1202 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1203 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1204 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1206 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1207 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1208 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1209 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1210 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1211 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1213 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1214 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1216 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1218 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1220 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1222 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1224 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1225 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1227 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1229 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1231 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1234 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1236 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1239 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1241 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1244 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1245 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1246 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1247 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1248 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1249 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1250 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1251 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1252 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1253 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1254 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1256 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1258 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1261 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1262 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1263 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1265 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1267 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1269 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1271 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1272 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1274 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1276 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1277 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1279 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1282 unsigned long offset
= (unsigned long)c
;
1283 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1284 offset
+= nr
* sizeof(struct btrfs_stripe
);
1285 return (struct btrfs_stripe
*)offset
;
1288 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1290 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1293 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1294 struct btrfs_chunk
*c
, int nr
)
1296 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1299 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1300 struct btrfs_chunk
*c
, int nr
,
1303 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1306 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1307 struct btrfs_chunk
*c
, int nr
)
1309 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1312 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1313 struct btrfs_chunk
*c
, int nr
,
1316 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1319 /* struct btrfs_block_group_item */
1320 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1322 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1324 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1325 struct btrfs_block_group_item
, chunk_objectid
, 64);
1327 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1328 struct btrfs_block_group_item
, chunk_objectid
, 64);
1329 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1330 struct btrfs_block_group_item
, flags
, 64);
1331 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1332 struct btrfs_block_group_item
, flags
, 64);
1334 /* struct btrfs_inode_ref */
1335 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1336 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1338 /* struct btrfs_inode_item */
1339 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1340 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1341 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1342 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1343 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1344 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1345 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1346 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1347 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1348 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1349 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1350 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1352 static inline struct btrfs_timespec
*
1353 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1355 unsigned long ptr
= (unsigned long)inode_item
;
1356 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1357 return (struct btrfs_timespec
*)ptr
;
1360 static inline struct btrfs_timespec
*
1361 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1363 unsigned long ptr
= (unsigned long)inode_item
;
1364 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1365 return (struct btrfs_timespec
*)ptr
;
1368 static inline struct btrfs_timespec
*
1369 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1371 unsigned long ptr
= (unsigned long)inode_item
;
1372 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1373 return (struct btrfs_timespec
*)ptr
;
1376 static inline struct btrfs_timespec
*
1377 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1379 unsigned long ptr
= (unsigned long)inode_item
;
1380 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1381 return (struct btrfs_timespec
*)ptr
;
1384 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1385 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1387 /* struct btrfs_dev_extent */
1388 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1390 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1391 chunk_objectid
, 64);
1392 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1394 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1396 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1398 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1399 return (u8
*)((unsigned long)dev
+ ptr
);
1402 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1403 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1405 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1407 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1410 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1412 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1413 struct btrfs_tree_block_info
*item
,
1414 struct btrfs_disk_key
*key
)
1416 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1419 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1420 struct btrfs_tree_block_info
*item
,
1421 struct btrfs_disk_key
*key
)
1423 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1426 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1428 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1430 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1432 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1435 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1438 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1440 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1443 static inline u32
btrfs_extent_inline_ref_size(int type
)
1445 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1446 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1447 return sizeof(struct btrfs_extent_inline_ref
);
1448 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1449 return sizeof(struct btrfs_shared_data_ref
) +
1450 sizeof(struct btrfs_extent_inline_ref
);
1451 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1452 return sizeof(struct btrfs_extent_data_ref
) +
1453 offsetof(struct btrfs_extent_inline_ref
, offset
);
1458 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1459 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1461 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1462 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1464 /* struct btrfs_node */
1465 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1466 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1468 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1471 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1472 sizeof(struct btrfs_key_ptr
) * nr
;
1473 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1476 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1480 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1481 sizeof(struct btrfs_key_ptr
) * nr
;
1482 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1485 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1488 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1489 sizeof(struct btrfs_key_ptr
) * nr
;
1490 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1493 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1497 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1498 sizeof(struct btrfs_key_ptr
) * nr
;
1499 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1502 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1504 return offsetof(struct btrfs_node
, ptrs
) +
1505 sizeof(struct btrfs_key_ptr
) * nr
;
1508 void btrfs_node_key(struct extent_buffer
*eb
,
1509 struct btrfs_disk_key
*disk_key
, int nr
);
1511 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1512 struct btrfs_disk_key
*disk_key
, int nr
)
1515 ptr
= btrfs_node_key_ptr_offset(nr
);
1516 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1517 struct btrfs_key_ptr
, key
, disk_key
);
1520 /* struct btrfs_item */
1521 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1522 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1524 static inline unsigned long btrfs_item_nr_offset(int nr
)
1526 return offsetof(struct btrfs_leaf
, items
) +
1527 sizeof(struct btrfs_item
) * nr
;
1530 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1533 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1536 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1537 struct btrfs_item
*item
)
1539 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1542 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1544 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1547 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1549 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1552 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1554 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1557 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1558 struct btrfs_disk_key
*disk_key
, int nr
)
1560 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1561 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1564 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1565 struct btrfs_disk_key
*disk_key
, int nr
)
1567 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1568 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1571 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1574 * struct btrfs_root_ref
1576 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1577 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1578 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1580 /* struct btrfs_dir_item */
1581 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1582 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1583 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1584 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1586 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1587 struct btrfs_dir_item
*item
,
1588 struct btrfs_disk_key
*key
)
1590 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1593 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1594 struct btrfs_dir_item
*item
,
1595 struct btrfs_disk_key
*key
)
1597 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1600 /* struct btrfs_disk_key */
1601 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1603 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1604 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1606 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1607 struct btrfs_disk_key
*disk
)
1609 cpu
->offset
= le64_to_cpu(disk
->offset
);
1610 cpu
->type
= disk
->type
;
1611 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1614 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1615 struct btrfs_key
*cpu
)
1617 disk
->offset
= cpu_to_le64(cpu
->offset
);
1618 disk
->type
= cpu
->type
;
1619 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1622 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1623 struct btrfs_key
*key
, int nr
)
1625 struct btrfs_disk_key disk_key
;
1626 btrfs_node_key(eb
, &disk_key
, nr
);
1627 btrfs_disk_key_to_cpu(key
, &disk_key
);
1630 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1631 struct btrfs_key
*key
, int nr
)
1633 struct btrfs_disk_key disk_key
;
1634 btrfs_item_key(eb
, &disk_key
, nr
);
1635 btrfs_disk_key_to_cpu(key
, &disk_key
);
1638 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1639 struct btrfs_dir_item
*item
,
1640 struct btrfs_key
*key
)
1642 struct btrfs_disk_key disk_key
;
1643 btrfs_dir_item_key(eb
, item
, &disk_key
);
1644 btrfs_disk_key_to_cpu(key
, &disk_key
);
1648 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1653 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1658 /* struct btrfs_header */
1659 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1660 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1662 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1663 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1664 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1665 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1667 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1669 return (btrfs_header_flags(eb
) & flag
) == flag
;
1672 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1674 u64 flags
= btrfs_header_flags(eb
);
1675 btrfs_set_header_flags(eb
, flags
| flag
);
1676 return (flags
& flag
) == flag
;
1679 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1681 u64 flags
= btrfs_header_flags(eb
);
1682 btrfs_set_header_flags(eb
, flags
& ~flag
);
1683 return (flags
& flag
) == flag
;
1686 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1688 u64 flags
= btrfs_header_flags(eb
);
1689 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1692 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1695 u64 flags
= btrfs_header_flags(eb
);
1696 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1697 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1698 btrfs_set_header_flags(eb
, flags
);
1701 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1703 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1707 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1709 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1713 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1715 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1719 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1721 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1725 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1730 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1735 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1740 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1742 return btrfs_header_level(eb
) == 0;
1745 /* struct btrfs_root_item */
1746 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1748 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1749 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1750 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1752 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1754 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1755 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1756 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1757 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1758 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1759 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1760 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1761 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1764 /* struct btrfs_super_block */
1766 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1767 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1768 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1770 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1771 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1772 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1773 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1774 struct btrfs_super_block
, chunk_root_generation
, 64);
1775 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1777 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1779 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1780 chunk_root_level
, 8);
1781 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1783 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1784 log_root_transid
, 64);
1785 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1787 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1789 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1791 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1793 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1795 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1797 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1799 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1800 root_dir_objectid
, 64);
1801 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1803 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1805 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1807 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1808 incompat_flags
, 64);
1809 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1812 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1814 int t
= btrfs_super_csum_type(s
);
1815 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1816 return btrfs_csum_sizes
[t
];
1819 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1821 return offsetof(struct btrfs_leaf
, items
);
1824 /* struct btrfs_file_extent_item */
1825 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1827 static inline unsigned long
1828 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
1830 unsigned long offset
= (unsigned long)e
;
1831 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1835 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1837 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1840 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1842 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1844 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1845 disk_num_bytes
, 64);
1846 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1848 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1850 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1852 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1854 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1856 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1857 other_encoding
, 16);
1859 /* this returns the number of file bytes represented by the inline item.
1860 * If an item is compressed, this is the uncompressed size
1862 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1863 struct btrfs_file_extent_item
*e
)
1865 return btrfs_file_extent_ram_bytes(eb
, e
);
1869 * this returns the number of bytes used by the item on disk, minus the
1870 * size of any extent headers. If a file is compressed on disk, this is
1871 * the compressed size
1873 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1874 struct btrfs_item
*e
)
1876 unsigned long offset
;
1877 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1878 return btrfs_item_size(eb
, e
) - offset
;
1881 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1883 return sb
->s_fs_info
;
1886 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1887 const char *name
, int len
)
1889 /* if we already have a name just free it */
1892 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1896 memcpy(root
->name
, name
, len
);
1897 root
->name
[len
] = '\0';
1902 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
1905 return root
->leafsize
;
1906 return root
->nodesize
;
1909 /* helper function to cast into the data area of the leaf. */
1910 #define btrfs_item_ptr(leaf, slot, type) \
1911 ((type *)(btrfs_leaf_data(leaf) + \
1912 btrfs_item_offset_nr(leaf, slot)))
1914 #define btrfs_item_ptr_offset(leaf, slot) \
1915 ((unsigned long)(btrfs_leaf_data(leaf) + \
1916 btrfs_item_offset_nr(leaf, slot)))
1918 static inline struct dentry
*fdentry(struct file
*file
)
1920 return file
->f_path
.dentry
;
1924 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
1925 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
1926 struct btrfs_root
*root
, unsigned long count
);
1927 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1928 int btrfs_update_pinned_extents(struct btrfs_root
*root
,
1929 u64 bytenr
, u64 num
, int pin
, int mark_free
);
1930 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
1931 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1932 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
1933 struct btrfs_root
*root
,
1934 u64 objectid
, u64 offset
, u64 bytenr
);
1935 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1936 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
1937 struct btrfs_fs_info
*info
,
1939 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
1940 u64
btrfs_find_block_group(struct btrfs_root
*root
,
1941 u64 search_start
, u64 search_hint
, int owner
);
1942 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1943 struct btrfs_root
*root
, u32 blocksize
,
1944 u64 parent
, u64 root_objectid
,
1945 struct btrfs_disk_key
*key
, int level
,
1946 u64 hint
, u64 empty_size
);
1947 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
1948 struct btrfs_root
*root
,
1949 u64 bytenr
, u32 blocksize
,
1951 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
1952 struct btrfs_root
*root
,
1953 u64 root_objectid
, u64 owner
,
1954 u64 offset
, struct btrfs_key
*ins
);
1955 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
1956 struct btrfs_root
*root
,
1957 u64 root_objectid
, u64 owner
, u64 offset
,
1958 struct btrfs_key
*ins
);
1959 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
1960 struct btrfs_root
*root
,
1961 u64 num_bytes
, u64 min_alloc_size
,
1962 u64 empty_size
, u64 hint_byte
,
1963 u64 search_end
, struct btrfs_key
*ins
,
1965 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1966 struct extent_buffer
*buf
, int full_backref
);
1967 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1968 struct extent_buffer
*buf
, int full_backref
);
1969 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
1970 struct btrfs_root
*root
,
1971 u64 bytenr
, u64 num_bytes
, u64 flags
,
1973 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
1974 struct btrfs_root
*root
,
1975 u64 bytenr
, u64 num_bytes
, u64 parent
,
1976 u64 root_objectid
, u64 owner
, u64 offset
);
1978 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1979 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1980 struct btrfs_root
*root
,
1981 struct extent_io_tree
*unpin
);
1982 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1983 struct btrfs_root
*root
,
1984 u64 bytenr
, u64 num_bytes
, u64 parent
,
1985 u64 root_objectid
, u64 owner
, u64 offset
);
1987 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1988 struct btrfs_root
*root
);
1989 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
1990 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1991 int btrfs_read_block_groups(struct btrfs_root
*root
);
1992 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1993 struct btrfs_root
*root
, u64 bytes_used
,
1994 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1996 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
1997 struct btrfs_root
*root
, u64 group_start
);
1998 int btrfs_prepare_block_group_relocation(struct btrfs_root
*root
,
1999 struct btrfs_block_group_cache
*group
);
2001 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
2002 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
2003 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2005 int btrfs_check_metadata_free_space(struct btrfs_root
*root
);
2006 int btrfs_check_data_free_space(struct btrfs_root
*root
, struct inode
*inode
,
2008 void btrfs_free_reserved_data_space(struct btrfs_root
*root
,
2009 struct inode
*inode
, u64 bytes
);
2010 void btrfs_delalloc_reserve_space(struct btrfs_root
*root
, struct inode
*inode
,
2012 void btrfs_delalloc_free_space(struct btrfs_root
*root
, struct inode
*inode
,
2014 void btrfs_free_super_mirror_extents(struct btrfs_fs_info
*info
);
2016 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2017 int level
, int *slot
);
2018 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2019 int btrfs_previous_item(struct btrfs_root
*root
,
2020 struct btrfs_path
*path
, u64 min_objectid
,
2022 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2023 struct btrfs_root
*root
, struct btrfs_path
*path
,
2024 struct btrfs_key
*new_key
);
2025 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2026 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2027 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2028 struct btrfs_key
*key
, int lowest_level
,
2029 int cache_only
, u64 min_trans
);
2030 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2031 struct btrfs_key
*max_key
,
2032 struct btrfs_path
*path
, int cache_only
,
2034 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2035 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2036 struct extent_buffer
*parent
, int parent_slot
,
2037 struct extent_buffer
**cow_ret
);
2038 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2039 struct btrfs_root
*root
,
2040 struct extent_buffer
*buf
,
2041 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2042 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2043 struct extent_buffer
*buf
);
2044 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2045 *root
, struct btrfs_path
*path
, u32 data_size
);
2046 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2047 struct btrfs_root
*root
,
2048 struct btrfs_path
*path
,
2049 u32 new_size
, int from_end
);
2050 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2051 struct btrfs_root
*root
,
2052 struct btrfs_path
*path
,
2053 struct btrfs_key
*new_key
,
2054 unsigned long split_offset
);
2055 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2056 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2058 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2059 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2060 int start_slot
, int cache_only
, u64
*last_ret
,
2061 struct btrfs_key
*progress
);
2062 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
2063 struct btrfs_path
*btrfs_alloc_path(void);
2064 void btrfs_free_path(struct btrfs_path
*p
);
2065 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2066 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2068 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2069 struct btrfs_path
*path
, int slot
, int nr
);
2070 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2071 struct btrfs_root
*root
,
2072 struct btrfs_path
*path
)
2074 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2077 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2078 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2079 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
2080 struct btrfs_root
*root
,
2081 struct btrfs_path
*path
,
2082 struct btrfs_key
*cpu_key
, u32
*data_size
,
2084 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2085 struct btrfs_root
*root
,
2086 struct btrfs_path
*path
,
2087 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2089 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2090 struct btrfs_root
*root
,
2091 struct btrfs_path
*path
,
2092 struct btrfs_key
*key
,
2095 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2098 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2099 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2100 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2101 int btrfs_drop_snapshot(struct btrfs_root
*root
, int update_ref
);
2102 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2103 struct btrfs_root
*root
,
2104 struct extent_buffer
*node
,
2105 struct extent_buffer
*parent
);
2107 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2108 struct btrfs_path
*path
,
2109 u64 root_id
, u64 ref_id
);
2110 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2111 struct btrfs_root
*tree_root
,
2112 u64 root_id
, u8 type
, u64 ref_id
,
2113 u64 dirid
, u64 sequence
,
2114 const char *name
, int name_len
);
2115 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2116 struct btrfs_key
*key
);
2117 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2118 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2120 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2121 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2123 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2124 btrfs_root_item
*item
, struct btrfs_key
*key
);
2125 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
2126 u64
*found_objectid
);
2127 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
);
2128 int btrfs_set_root_node(struct btrfs_root_item
*item
,
2129 struct extent_buffer
*node
);
2131 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2132 struct btrfs_root
*root
, const char *name
,
2133 int name_len
, u64 dir
,
2134 struct btrfs_key
*location
, u8 type
, u64 index
);
2135 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2136 struct btrfs_root
*root
,
2137 struct btrfs_path
*path
, u64 dir
,
2138 const char *name
, int name_len
,
2140 struct btrfs_dir_item
*
2141 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2142 struct btrfs_root
*root
,
2143 struct btrfs_path
*path
, u64 dir
,
2144 u64 objectid
, const char *name
, int name_len
,
2146 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2147 struct btrfs_path
*path
,
2148 const char *name
, int name_len
);
2149 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2150 struct btrfs_root
*root
,
2151 struct btrfs_path
*path
,
2152 struct btrfs_dir_item
*di
);
2153 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2154 struct btrfs_root
*root
, const char *name
,
2155 u16 name_len
, const void *data
, u16 data_len
,
2157 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2158 struct btrfs_root
*root
,
2159 struct btrfs_path
*path
, u64 dir
,
2160 const char *name
, u16 name_len
,
2164 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2165 struct btrfs_root
*root
, u64 offset
);
2166 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2167 struct btrfs_root
*root
, u64 offset
);
2170 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2171 struct btrfs_root
*fs_root
,
2172 u64 dirid
, u64
*objectid
);
2173 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2176 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2177 struct btrfs_root
*root
,
2178 const char *name
, int name_len
,
2179 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2180 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2181 struct btrfs_root
*root
,
2182 const char *name
, int name_len
,
2183 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2184 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2185 struct btrfs_root
*root
,
2186 struct btrfs_path
*path
, u64 objectid
);
2187 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2188 *root
, struct btrfs_path
*path
,
2189 struct btrfs_key
*location
, int mod
);
2192 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2193 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2194 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2195 struct bio
*bio
, u32
*dst
);
2196 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2197 struct btrfs_root
*root
,
2198 u64 objectid
, u64 pos
,
2199 u64 disk_offset
, u64 disk_num_bytes
,
2200 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2201 u8 compression
, u8 encryption
, u16 other_encoding
);
2202 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2203 struct btrfs_root
*root
,
2204 struct btrfs_path
*path
, u64 objectid
,
2205 u64 bytenr
, int mod
);
2206 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2207 struct btrfs_root
*root
,
2208 struct btrfs_ordered_sum
*sums
);
2209 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2210 struct bio
*bio
, u64 file_start
, int contig
);
2211 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
2212 u64 start
, unsigned long len
);
2213 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2214 struct btrfs_root
*root
,
2215 struct btrfs_path
*path
,
2216 u64 bytenr
, int cow
);
2217 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2218 struct btrfs_root
*root
, struct btrfs_path
*path
,
2220 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
2221 u64 end
, struct list_head
*list
);
2224 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2225 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2226 #define ClearPageChecked ClearPageFsMisc
2227 #define SetPageChecked SetPageFsMisc
2228 #define PageChecked PageFsMisc
2231 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2232 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2233 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2234 struct btrfs_root
*root
,
2235 struct inode
*dir
, struct inode
*inode
,
2236 const char *name
, int name_len
);
2237 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2238 struct inode
*parent_inode
, struct inode
*inode
,
2239 const char *name
, int name_len
, int add_backref
, u64 index
);
2240 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2241 struct btrfs_root
*root
,
2242 struct inode
*inode
, u64 new_size
,
2245 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
);
2246 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
);
2247 int btrfs_writepages(struct address_space
*mapping
,
2248 struct writeback_control
*wbc
);
2249 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2250 struct btrfs_root
*new_root
, struct dentry
*dentry
,
2251 u64 new_dirid
, u64 alloc_hint
);
2252 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2253 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2255 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2256 struct file_ra_state
*ra
, struct file
*file
,
2257 pgoff_t offset
, pgoff_t last_index
);
2258 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2259 int btrfs_readpage(struct file
*file
, struct page
*page
);
2260 void btrfs_delete_inode(struct inode
*inode
);
2261 void btrfs_put_inode(struct inode
*inode
);
2262 int btrfs_write_inode(struct inode
*inode
, int wait
);
2263 void btrfs_dirty_inode(struct inode
*inode
);
2264 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2265 void btrfs_destroy_inode(struct inode
*inode
);
2266 int btrfs_init_cachep(void);
2267 void btrfs_destroy_cachep(void);
2268 long btrfs_ioctl_trans_end(struct file
*file
);
2269 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2270 struct btrfs_root
*root
);
2271 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2272 unsigned from
, unsigned to
);
2273 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2274 size_t page_offset
, u64 start
, u64 end
,
2276 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2277 struct btrfs_root
*root
,
2278 struct inode
*inode
);
2279 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2280 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2281 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
2282 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
2285 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2286 void btrfs_update_iflags(struct inode
*inode
);
2287 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
2290 int btrfs_sync_file(struct file
*file
, struct dentry
*dentry
, int datasync
);
2291 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2293 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2294 extern struct file_operations btrfs_file_operations
;
2295 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
2296 struct btrfs_root
*root
, struct inode
*inode
,
2297 u64 start
, u64 end
, u64 locked_end
,
2298 u64 inline_limit
, u64
*hint_block
);
2299 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2300 struct btrfs_root
*root
,
2301 struct inode
*inode
, u64 start
, u64 end
);
2302 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2305 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2306 struct btrfs_root
*root
, int cache_only
);
2309 int btrfs_init_sysfs(void);
2310 void btrfs_exit_sysfs(void);
2311 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2312 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2313 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2314 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2317 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2320 u64
btrfs_parse_size(char *str
);
2321 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2322 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2325 #ifdef CONFIG_FS_POSIX_ACL
2326 int btrfs_check_acl(struct inode
*inode
, int mask
);
2328 #define btrfs_check_acl NULL
2330 int btrfs_init_acl(struct inode
*inode
, struct inode
*dir
);
2331 int btrfs_acl_chmod(struct inode
*inode
);
2334 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
2335 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
2336 struct btrfs_root
*root
);
2337 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
2338 struct btrfs_root
*root
);
2339 int btrfs_recover_relocation(struct btrfs_root
*root
);
2340 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);