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
49 * files bigger than this get some pre-flushing when they are added
50 * to the ordered operations list. That way we limit the total
51 * work done by the commit
53 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
55 /* holds pointers to all of the tree roots */
56 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
58 /* stores information about which extents are in use, and reference counts */
59 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
62 * chunk tree stores translations from logical -> physical block numbering
63 * the super block points to the chunk tree
65 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
68 * stores information about which areas of a given device are in use.
69 * one per device. The tree of tree roots points to the device tree
71 #define BTRFS_DEV_TREE_OBJECTID 4ULL
73 /* one per subvolume, storing files and directories */
74 #define BTRFS_FS_TREE_OBJECTID 5ULL
76 /* directory objectid inside the root tree */
77 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
79 /* holds checksums of all the data extents */
80 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
82 /* orhpan objectid for tracking unlinked/truncated files */
83 #define BTRFS_ORPHAN_OBJECTID -5ULL
85 /* does write ahead logging to speed up fsyncs */
86 #define BTRFS_TREE_LOG_OBJECTID -6ULL
87 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
89 /* for space balancing */
90 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
91 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
94 * extent checksums all have this objectid
95 * this allows them to share the logging tree
98 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
100 /* dummy objectid represents multiple objectids */
101 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
104 * All files have objectids in this range.
106 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
107 #define BTRFS_LAST_FREE_OBJECTID -256ULL
108 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
112 * the device items go into the chunk tree. The key is in the form
113 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
115 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
118 * we can actually store much bigger names, but lets not confuse the rest
121 #define BTRFS_NAME_LEN 255
123 /* 32 bytes in various csum fields */
124 #define BTRFS_CSUM_SIZE 32
127 #define BTRFS_CSUM_TYPE_CRC32 0
129 static int btrfs_csum_sizes
[] = { 4, 0 };
131 /* four bytes for CRC32 */
132 #define BTRFS_EMPTY_DIR_SIZE 0
134 #define BTRFS_FT_UNKNOWN 0
135 #define BTRFS_FT_REG_FILE 1
136 #define BTRFS_FT_DIR 2
137 #define BTRFS_FT_CHRDEV 3
138 #define BTRFS_FT_BLKDEV 4
139 #define BTRFS_FT_FIFO 5
140 #define BTRFS_FT_SOCK 6
141 #define BTRFS_FT_SYMLINK 7
142 #define BTRFS_FT_XATTR 8
143 #define BTRFS_FT_MAX 9
146 * The key defines the order in the tree, and so it also defines (optimal)
149 * objectid corresponds to the inode number.
151 * type tells us things about the object, and is a kind of stream selector.
152 * so for a given inode, keys with type of 1 might refer to the inode data,
153 * type of 2 may point to file data in the btree and type == 3 may point to
156 * offset is the starting byte offset for this key in the stream.
158 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
159 * in cpu native order. Otherwise they are identical and their sizes
160 * should be the same (ie both packed)
162 struct btrfs_disk_key
{
166 } __attribute__ ((__packed__
));
172 } __attribute__ ((__packed__
));
174 struct btrfs_mapping_tree
{
175 struct extent_map_tree map_tree
;
178 #define BTRFS_UUID_SIZE 16
179 struct btrfs_dev_item
{
180 /* the internal btrfs device id */
183 /* size of the device */
189 /* optimal io alignment for this device */
192 /* optimal io width for this device */
195 /* minimal io size for this device */
198 /* type and info about this device */
201 /* expected generation for this device */
205 * starting byte of this partition on the device,
206 * to allow for stripe alignment in the future
210 /* grouping information for allocation decisions */
213 /* seek speed 0-100 where 100 is fastest */
216 /* bandwidth 0-100 where 100 is fastest */
219 /* btrfs generated uuid for this device */
220 u8 uuid
[BTRFS_UUID_SIZE
];
222 /* uuid of FS who owns this device */
223 u8 fsid
[BTRFS_UUID_SIZE
];
224 } __attribute__ ((__packed__
));
226 struct btrfs_stripe
{
229 u8 dev_uuid
[BTRFS_UUID_SIZE
];
230 } __attribute__ ((__packed__
));
233 /* size of this chunk in bytes */
236 /* objectid of the root referencing this chunk */
242 /* optimal io alignment for this chunk */
245 /* optimal io width for this chunk */
248 /* minimal io size for this chunk */
251 /* 2^16 stripes is quite a lot, a second limit is the size of a single
256 /* sub stripes only matter for raid10 */
258 struct btrfs_stripe stripe
;
259 /* additional stripes go here */
260 } __attribute__ ((__packed__
));
262 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
264 BUG_ON(num_stripes
== 0);
265 return sizeof(struct btrfs_chunk
) +
266 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
269 #define BTRFS_FSID_SIZE 16
270 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
273 * every tree block (leaf or node) starts with this header.
275 struct btrfs_header
{
276 /* these first four must match the super block */
277 u8 csum
[BTRFS_CSUM_SIZE
];
278 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
279 __le64 bytenr
; /* which block this node is supposed to live in */
282 /* allowed to be different from the super from here on down */
283 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
288 } __attribute__ ((__packed__
));
290 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
291 sizeof(struct btrfs_header)) / \
292 sizeof(struct btrfs_key_ptr))
293 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
294 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
295 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
296 sizeof(struct btrfs_item) - \
297 sizeof(struct btrfs_file_extent_item))
299 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
302 * this is a very generous portion of the super block, giving us
303 * room to translate 14 chunks with 3 stripes each.
305 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
306 #define BTRFS_LABEL_SIZE 256
309 * the super block basically lists the main trees of the FS
310 * it currently lacks any block count etc etc
312 struct btrfs_super_block
{
313 u8 csum
[BTRFS_CSUM_SIZE
];
314 /* the first 4 fields must match struct btrfs_header */
315 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
316 __le64 bytenr
; /* this block number */
319 /* allowed to be different from the btrfs_header from here own down */
326 /* this will help find the new super based on the log root */
327 __le64 log_root_transid
;
330 __le64 root_dir_objectid
;
336 __le32 sys_chunk_array_size
;
337 __le64 chunk_root_generation
;
339 __le64 compat_ro_flags
;
340 __le64 incompat_flags
;
345 struct btrfs_dev_item dev_item
;
347 char label
[BTRFS_LABEL_SIZE
];
349 /* future expansion */
351 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
352 } __attribute__ ((__packed__
));
355 * Compat flags that we support. If any incompat flags are set other than the
356 * ones specified below then we will fail to mount
358 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
359 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
360 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
363 * A leaf is full of items. offset and size tell us where to find
364 * the item in the leaf (relative to the start of the data area)
367 struct btrfs_disk_key key
;
370 } __attribute__ ((__packed__
));
373 * leaves have an item area and a data area:
374 * [item0, item1....itemN] [free space] [dataN...data1, data0]
376 * The data is separate from the items to get the keys closer together
380 struct btrfs_header header
;
381 struct btrfs_item items
[];
382 } __attribute__ ((__packed__
));
385 * all non-leaf blocks are nodes, they hold only keys and pointers to
388 struct btrfs_key_ptr
{
389 struct btrfs_disk_key key
;
392 } __attribute__ ((__packed__
));
395 struct btrfs_header header
;
396 struct btrfs_key_ptr ptrs
[];
397 } __attribute__ ((__packed__
));
400 * btrfs_paths remember the path taken from the root down to the leaf.
401 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
402 * to any other levels that are present.
404 * The slots array records the index of the item or block pointer
405 * used while walking the tree.
408 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
409 int slots
[BTRFS_MAX_LEVEL
];
410 /* if there is real range locking, this locks field will change */
411 int locks
[BTRFS_MAX_LEVEL
];
413 /* keep some upper locks as we walk down */
417 * set by btrfs_split_item, tells search_slot to keep all locks
418 * and to force calls to keep space in the nodes
420 unsigned int search_for_split
:1;
421 unsigned int keep_locks
:1;
422 unsigned int skip_locking
:1;
423 unsigned int leave_spinning
:1;
427 * items in the extent btree are used to record the objectid of the
428 * owner of the block and the number of references
430 struct btrfs_extent_item
{
432 } __attribute__ ((__packed__
));
434 struct btrfs_extent_ref
{
439 } __attribute__ ((__packed__
));
441 /* dev extents record free space on individual devices. The owner
442 * field points back to the chunk allocation mapping tree that allocated
443 * the extent. The chunk tree uuid field is a way to double check the owner
445 struct btrfs_dev_extent
{
447 __le64 chunk_objectid
;
450 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
451 } __attribute__ ((__packed__
));
453 struct btrfs_inode_ref
{
457 } __attribute__ ((__packed__
));
459 struct btrfs_timespec
{
462 } __attribute__ ((__packed__
));
464 enum btrfs_compression_type
{
465 BTRFS_COMPRESS_NONE
= 0,
466 BTRFS_COMPRESS_ZLIB
= 1,
467 BTRFS_COMPRESS_LAST
= 2,
470 struct btrfs_inode_item
{
471 /* nfs style generation number */
473 /* transid that last touched this inode */
485 /* modification sequence number for NFS */
489 * a little future expansion, for more than this we can
490 * just grow the inode item and version it
493 struct btrfs_timespec atime
;
494 struct btrfs_timespec ctime
;
495 struct btrfs_timespec mtime
;
496 struct btrfs_timespec otime
;
497 } __attribute__ ((__packed__
));
499 struct btrfs_dir_log_item
{
501 } __attribute__ ((__packed__
));
503 struct btrfs_dir_item
{
504 struct btrfs_disk_key location
;
509 } __attribute__ ((__packed__
));
511 struct btrfs_root_item
{
512 struct btrfs_inode_item inode
;
518 __le64 last_snapshot
;
521 struct btrfs_disk_key drop_progress
;
524 } __attribute__ ((__packed__
));
527 * this is used for both forward and backward root refs
529 struct btrfs_root_ref
{
533 } __attribute__ ((__packed__
));
535 #define BTRFS_FILE_EXTENT_INLINE 0
536 #define BTRFS_FILE_EXTENT_REG 1
537 #define BTRFS_FILE_EXTENT_PREALLOC 2
539 struct btrfs_file_extent_item
{
541 * transaction id that created this extent
545 * max number of bytes to hold this extent in ram
546 * when we split a compressed extent we can't know how big
547 * each of the resulting pieces will be. So, this is
548 * an upper limit on the size of the extent in ram instead of
554 * 32 bits for the various ways we might encode the data,
555 * including compression and encryption. If any of these
556 * are set to something a given disk format doesn't understand
557 * it is treated like an incompat flag for reading and writing,
562 __le16 other_encoding
; /* spare for later use */
564 /* are we inline data or a real extent? */
568 * disk space consumed by the extent, checksum blocks are included
572 __le64 disk_num_bytes
;
574 * the logical offset in file blocks (no csums)
575 * this extent record is for. This allows a file extent to point
576 * into the middle of an existing extent on disk, sharing it
577 * between two snapshots (useful if some bytes in the middle of the
578 * extent have changed
582 * the logical number of file blocks (no csums included). This
583 * always reflects the size uncompressed and without encoding.
587 } __attribute__ ((__packed__
));
589 struct btrfs_csum_item
{
591 } __attribute__ ((__packed__
));
593 /* different types of block groups (and chunks) */
594 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
595 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
596 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
597 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
598 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
599 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
600 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
602 struct btrfs_block_group_item
{
604 __le64 chunk_objectid
;
606 } __attribute__ ((__packed__
));
608 struct btrfs_space_info
{
611 u64 total_bytes
; /* total bytes in the space */
612 u64 bytes_used
; /* total bytes used on disk */
613 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
614 transaction finishes */
615 u64 bytes_reserved
; /* total bytes the allocator has reserved for
616 current allocations */
617 u64 bytes_readonly
; /* total bytes that are read only */
619 /* delalloc accounting */
620 u64 bytes_delalloc
; /* number of bytes reserved for allocation,
621 this space is not necessarily reserved yet
623 u64 bytes_may_use
; /* number of bytes that may be used for
626 int full
; /* indicates that we cannot allocate any more
627 chunks for this space */
628 int force_alloc
; /* set if we need to force a chunk alloc for
631 struct list_head list
;
633 /* for block groups in our same type */
634 struct list_head block_groups
;
636 struct rw_semaphore groups_sem
;
640 * free clusters are used to claim free space in relatively large chunks,
641 * allowing us to do less seeky writes. They are used for all metadata
642 * allocations and data allocations in ssd mode.
644 struct btrfs_free_cluster
{
646 spinlock_t refill_lock
;
649 /* largest extent in this cluster */
652 /* first extent starting offset */
655 struct btrfs_block_group_cache
*block_group
;
657 * when a cluster is allocated from a block group, we put the
658 * cluster onto a list in the block group so that it can
659 * be freed before the block group is freed.
661 struct list_head block_group_list
;
664 struct btrfs_block_group_cache
{
665 struct btrfs_key key
;
666 struct btrfs_block_group_item item
;
668 struct mutex cache_mutex
;
676 struct btrfs_space_info
*space_info
;
678 /* free space cache stuff */
679 spinlock_t tree_lock
;
680 struct rb_root free_space_bytes
;
681 struct rb_root free_space_offset
;
683 /* block group cache stuff */
684 struct rb_node cache_node
;
686 /* for block groups in the same raid type */
687 struct list_head list
;
692 /* List of struct btrfs_free_clusters for this block group.
693 * Today it will only have one thing on it, but that may change
695 struct list_head cluster_list
;
698 struct btrfs_leaf_ref_tree
{
700 struct list_head list
;
705 struct btrfs_fs_devices
;
706 struct btrfs_fs_info
{
707 u8 fsid
[BTRFS_FSID_SIZE
];
708 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
709 struct btrfs_root
*extent_root
;
710 struct btrfs_root
*tree_root
;
711 struct btrfs_root
*chunk_root
;
712 struct btrfs_root
*dev_root
;
713 struct btrfs_root
*fs_root
;
714 struct btrfs_root
*csum_root
;
716 /* the log root tree is a directory of all the other log roots */
717 struct btrfs_root
*log_root_tree
;
718 struct radix_tree_root fs_roots_radix
;
720 /* block group cache stuff */
721 spinlock_t block_group_cache_lock
;
722 struct rb_root block_group_cache_tree
;
724 struct extent_io_tree pinned_extents
;
726 /* logical->physical extent mapping */
727 struct btrfs_mapping_tree mapping_tree
;
730 u64 last_trans_committed
;
733 * this is updated to the current trans every time a full commit
734 * is required instead of the faster short fsync log commits
736 u64 last_trans_log_full_commit
;
737 u64 open_ioctl_trans
;
738 unsigned long mount_opt
;
742 struct btrfs_transaction
*running_transaction
;
743 wait_queue_head_t transaction_throttle
;
744 wait_queue_head_t transaction_wait
;
745 wait_queue_head_t async_submit_wait
;
747 struct btrfs_super_block super_copy
;
748 struct btrfs_super_block super_for_commit
;
749 struct block_device
*__bdev
;
750 struct super_block
*sb
;
751 struct inode
*btree_inode
;
752 struct backing_dev_info bdi
;
753 struct mutex trans_mutex
;
754 struct mutex tree_log_mutex
;
755 struct mutex transaction_kthread_mutex
;
756 struct mutex cleaner_mutex
;
757 struct mutex chunk_mutex
;
758 struct mutex drop_mutex
;
759 struct mutex volume_mutex
;
760 struct mutex tree_reloc_mutex
;
763 * this protects the ordered operations list only while we are
764 * processing all of the entries on it. This way we make
765 * sure the commit code doesn't find the list temporarily empty
766 * because another function happens to be doing non-waiting preflush
767 * before jumping into the main commit.
769 struct mutex ordered_operations_mutex
;
771 struct list_head trans_list
;
772 struct list_head hashers
;
773 struct list_head dead_roots
;
775 atomic_t nr_async_submits
;
776 atomic_t async_submit_draining
;
777 atomic_t nr_async_bios
;
778 atomic_t async_delalloc_pages
;
781 * this is used by the balancing code to wait for all the pending
784 spinlock_t ordered_extent_lock
;
787 * all of the data=ordered extents pending writeback
788 * these can span multiple transactions and basically include
789 * every dirty data page that isn't from nodatacow
791 struct list_head ordered_extents
;
794 * all of the inodes that have delalloc bytes. It is possible for
795 * this list to be empty even when there is still dirty data=ordered
796 * extents waiting to finish IO.
798 struct list_head delalloc_inodes
;
801 * special rename and truncate targets that must be on disk before
802 * we're allowed to commit. This is basically the ext3 style
805 struct list_head ordered_operations
;
808 * there is a pool of worker threads for checksumming during writes
809 * and a pool for checksumming after reads. This is because readers
810 * can run with FS locks held, and the writers may be waiting for
811 * those locks. We don't want ordering in the pending list to cause
812 * deadlocks, and so the two are serviced separately.
814 * A third pool does submit_bio to avoid deadlocking with the other
817 struct btrfs_workers workers
;
818 struct btrfs_workers delalloc_workers
;
819 struct btrfs_workers endio_workers
;
820 struct btrfs_workers endio_meta_workers
;
821 struct btrfs_workers endio_meta_write_workers
;
822 struct btrfs_workers endio_write_workers
;
823 struct btrfs_workers submit_workers
;
825 * fixup workers take dirty pages that didn't properly go through
826 * the cow mechanism and make them safe to write. It happens
827 * for the sys_munmap function call path
829 struct btrfs_workers fixup_workers
;
830 struct task_struct
*transaction_kthread
;
831 struct task_struct
*cleaner_kthread
;
832 int thread_pool_size
;
834 /* tree relocation relocated fields */
835 struct list_head dead_reloc_roots
;
836 struct btrfs_leaf_ref_tree reloc_ref_tree
;
837 struct btrfs_leaf_ref_tree shared_ref_tree
;
839 struct kobject super_kobj
;
840 struct completion kobj_unregister
;
843 int log_root_recovering
;
845 atomic_t throttle_gen
;
849 /* protected by the delalloc lock, used to keep from writing
850 * metadata until there is a nice batch
852 u64 dirty_metadata_bytes
;
853 struct list_head dirty_cowonly_roots
;
855 struct btrfs_fs_devices
*fs_devices
;
858 * the space_info list is almost entirely read only. It only changes
859 * when we add a new raid type to the FS, and that happens
860 * very rarely. RCU is used to protect it.
862 struct list_head space_info
;
864 spinlock_t delalloc_lock
;
865 spinlock_t new_trans_lock
;
868 /* data_alloc_cluster is only used in ssd mode */
869 struct btrfs_free_cluster data_alloc_cluster
;
871 /* all metadata allocations go through this cluster */
872 struct btrfs_free_cluster meta_alloc_cluster
;
874 spinlock_t ref_cache_lock
;
875 u64 total_ref_cache_size
;
877 u64 avail_data_alloc_bits
;
878 u64 avail_metadata_alloc_bits
;
879 u64 avail_system_alloc_bits
;
880 u64 data_alloc_profile
;
881 u64 metadata_alloc_profile
;
882 u64 system_alloc_profile
;
888 * in ram representation of the tree. extent_root is used for all allocations
889 * and for the extent tree extent_root root.
891 struct btrfs_dirty_root
;
893 struct extent_buffer
*node
;
895 /* the node lock is held while changing the node pointer */
896 spinlock_t node_lock
;
898 struct extent_buffer
*commit_root
;
899 struct btrfs_leaf_ref_tree
*ref_tree
;
900 struct btrfs_leaf_ref_tree ref_tree_struct
;
901 struct btrfs_dirty_root
*dirty_root
;
902 struct btrfs_root
*log_root
;
903 struct btrfs_root
*reloc_root
;
905 struct btrfs_root_item root_item
;
906 struct btrfs_key root_key
;
907 struct btrfs_fs_info
*fs_info
;
908 struct extent_io_tree dirty_log_pages
;
910 struct kobject root_kobj
;
911 struct completion kobj_unregister
;
912 struct mutex objectid_mutex
;
914 struct mutex log_mutex
;
915 wait_queue_head_t log_writer_wait
;
916 wait_queue_head_t log_commit_wait
[2];
917 atomic_t log_writers
;
918 atomic_t log_commit
[2];
919 unsigned long log_transid
;
920 unsigned long log_batch
;
925 /* data allocations are done in sectorsize units */
928 /* node allocations are done in nodesize units */
931 /* leaf allocations are done in leafsize units */
938 u64 last_inode_alloc
;
941 u64 defrag_trans_start
;
942 struct btrfs_key defrag_progress
;
943 struct btrfs_key defrag_max
;
949 /* the dirty list is only used by non-reference counted roots */
950 struct list_head dirty_list
;
952 spinlock_t list_lock
;
953 struct list_head dead_list
;
954 struct list_head orphan_list
;
957 * right now this just gets used so that a root has its own devid
958 * for stat. It may be used for more later
960 struct super_block anon_super
;
964 * inode items have the data typically returned from stat and store other
965 * info about object characteristics. There is one for every file and dir in
968 #define BTRFS_INODE_ITEM_KEY 1
969 #define BTRFS_INODE_REF_KEY 12
970 #define BTRFS_XATTR_ITEM_KEY 24
971 #define BTRFS_ORPHAN_ITEM_KEY 48
972 /* reserve 2-15 close to the inode for later flexibility */
975 * dir items are the name -> inode pointers in a directory. There is one
976 * for every name in a directory.
978 #define BTRFS_DIR_LOG_ITEM_KEY 60
979 #define BTRFS_DIR_LOG_INDEX_KEY 72
980 #define BTRFS_DIR_ITEM_KEY 84
981 #define BTRFS_DIR_INDEX_KEY 96
983 * extent data is for file data
985 #define BTRFS_EXTENT_DATA_KEY 108
988 * extent csums are stored in a separate tree and hold csums for
989 * an entire extent on disk.
991 #define BTRFS_EXTENT_CSUM_KEY 128
994 * root items point to tree roots. They are typically in the root
995 * tree used by the super block to find all the other trees
997 #define BTRFS_ROOT_ITEM_KEY 132
1000 * root backrefs tie subvols and snapshots to the directory entries that
1003 #define BTRFS_ROOT_BACKREF_KEY 144
1006 * root refs make a fast index for listing all of the snapshots and
1007 * subvolumes referenced by a given root. They point directly to the
1008 * directory item in the root that references the subvol
1010 #define BTRFS_ROOT_REF_KEY 156
1013 * extent items are in the extent map tree. These record which blocks
1014 * are used, and how many references there are to each block
1016 #define BTRFS_EXTENT_ITEM_KEY 168
1017 #define BTRFS_EXTENT_REF_KEY 180
1020 * block groups give us hints into the extent allocation trees. Which
1021 * blocks are free etc etc
1023 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1025 #define BTRFS_DEV_EXTENT_KEY 204
1026 #define BTRFS_DEV_ITEM_KEY 216
1027 #define BTRFS_CHUNK_ITEM_KEY 228
1030 * string items are for debugging. They just store a short string of
1033 #define BTRFS_STRING_ITEM_KEY 253
1035 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1036 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1037 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1038 #define BTRFS_MOUNT_SSD (1 << 3)
1039 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1040 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1041 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1042 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1044 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1045 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1046 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1051 #define BTRFS_INODE_NODATASUM (1 << 0)
1052 #define BTRFS_INODE_NODATACOW (1 << 1)
1053 #define BTRFS_INODE_READONLY (1 << 2)
1054 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1055 #define BTRFS_INODE_PREALLOC (1 << 4)
1056 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
1057 ~BTRFS_INODE_##flag)
1058 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
1060 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
1062 /* some macros to generate set/get funcs for the struct fields. This
1063 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1066 #define le8_to_cpu(v) (v)
1067 #define cpu_to_le8(v) (v)
1070 #define read_eb_member(eb, ptr, type, member, result) ( \
1071 read_extent_buffer(eb, (char *)(result), \
1072 ((unsigned long)(ptr)) + \
1073 offsetof(type, member), \
1074 sizeof(((type *)0)->member)))
1076 #define write_eb_member(eb, ptr, type, member, result) ( \
1077 write_extent_buffer(eb, (char *)(result), \
1078 ((unsigned long)(ptr)) + \
1079 offsetof(type, member), \
1080 sizeof(((type *)0)->member)))
1082 #ifndef BTRFS_SETGET_FUNCS
1083 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1084 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1085 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1088 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1089 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1091 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1092 u##bits res = le##bits##_to_cpu(p->member); \
1093 kunmap_atomic(p, KM_USER0); \
1096 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1099 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1100 p->member = cpu_to_le##bits(val); \
1101 kunmap_atomic(p, KM_USER0); \
1104 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1105 static inline u##bits btrfs_##name(type *s) \
1107 return le##bits##_to_cpu(s->member); \
1109 static inline void btrfs_set_##name(type *s, u##bits val) \
1111 s->member = cpu_to_le##bits(val); \
1114 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1115 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1116 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1117 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1118 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1119 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1121 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1122 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1123 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1124 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1125 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1126 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1128 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1129 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1131 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1133 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1135 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1137 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1139 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1140 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1142 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1144 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1146 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1149 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1151 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1154 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1156 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1159 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1160 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1161 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1162 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1163 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1164 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1165 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1166 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1167 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1168 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1169 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1171 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1173 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1176 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1177 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1178 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1180 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1182 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1184 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1186 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1187 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1189 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1191 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1192 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1194 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1197 unsigned long offset
= (unsigned long)c
;
1198 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1199 offset
+= nr
* sizeof(struct btrfs_stripe
);
1200 return (struct btrfs_stripe
*)offset
;
1203 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1205 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1208 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1209 struct btrfs_chunk
*c
, int nr
)
1211 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1214 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1215 struct btrfs_chunk
*c
, int nr
,
1218 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1221 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1222 struct btrfs_chunk
*c
, int nr
)
1224 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1227 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1228 struct btrfs_chunk
*c
, int nr
,
1231 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1234 /* struct btrfs_block_group_item */
1235 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1237 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1239 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1240 struct btrfs_block_group_item
, chunk_objectid
, 64);
1242 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1243 struct btrfs_block_group_item
, chunk_objectid
, 64);
1244 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1245 struct btrfs_block_group_item
, flags
, 64);
1246 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1247 struct btrfs_block_group_item
, flags
, 64);
1249 /* struct btrfs_inode_ref */
1250 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1251 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1253 /* struct btrfs_inode_item */
1254 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1255 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1256 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1257 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1258 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1259 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1260 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1261 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1262 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1263 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1264 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1265 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1267 static inline struct btrfs_timespec
*
1268 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1270 unsigned long ptr
= (unsigned long)inode_item
;
1271 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1272 return (struct btrfs_timespec
*)ptr
;
1275 static inline struct btrfs_timespec
*
1276 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1278 unsigned long ptr
= (unsigned long)inode_item
;
1279 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1280 return (struct btrfs_timespec
*)ptr
;
1283 static inline struct btrfs_timespec
*
1284 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1286 unsigned long ptr
= (unsigned long)inode_item
;
1287 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1288 return (struct btrfs_timespec
*)ptr
;
1291 static inline struct btrfs_timespec
*
1292 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1294 unsigned long ptr
= (unsigned long)inode_item
;
1295 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1296 return (struct btrfs_timespec
*)ptr
;
1299 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1300 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1302 /* struct btrfs_dev_extent */
1303 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1305 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1306 chunk_objectid
, 64);
1307 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1309 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1311 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1313 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1314 return (u8
*)((unsigned long)dev
+ ptr
);
1317 /* struct btrfs_extent_ref */
1318 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
1319 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
1320 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
1321 BTRFS_SETGET_FUNCS(ref_num_refs
, struct btrfs_extent_ref
, num_refs
, 32);
1323 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
1324 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
1326 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
1328 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs
, struct btrfs_extent_ref
,
1331 /* struct btrfs_extent_item */
1332 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
1333 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
1336 /* struct btrfs_node */
1337 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1338 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1340 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1343 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1344 sizeof(struct btrfs_key_ptr
) * nr
;
1345 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1348 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1352 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1353 sizeof(struct btrfs_key_ptr
) * nr
;
1354 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1357 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1360 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1361 sizeof(struct btrfs_key_ptr
) * nr
;
1362 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1365 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1369 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1370 sizeof(struct btrfs_key_ptr
) * nr
;
1371 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1374 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1376 return offsetof(struct btrfs_node
, ptrs
) +
1377 sizeof(struct btrfs_key_ptr
) * nr
;
1380 void btrfs_node_key(struct extent_buffer
*eb
,
1381 struct btrfs_disk_key
*disk_key
, int nr
);
1383 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1384 struct btrfs_disk_key
*disk_key
, int nr
)
1387 ptr
= btrfs_node_key_ptr_offset(nr
);
1388 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1389 struct btrfs_key_ptr
, key
, disk_key
);
1392 /* struct btrfs_item */
1393 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1394 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1396 static inline unsigned long btrfs_item_nr_offset(int nr
)
1398 return offsetof(struct btrfs_leaf
, items
) +
1399 sizeof(struct btrfs_item
) * nr
;
1402 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1405 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1408 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1409 struct btrfs_item
*item
)
1411 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1414 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1416 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1419 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1421 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1424 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1426 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1429 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1430 struct btrfs_disk_key
*disk_key
, int nr
)
1432 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1433 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1436 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1437 struct btrfs_disk_key
*disk_key
, int nr
)
1439 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1440 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1443 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1446 * struct btrfs_root_ref
1448 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1449 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1450 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1452 /* struct btrfs_dir_item */
1453 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1454 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1455 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1456 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1458 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1459 struct btrfs_dir_item
*item
,
1460 struct btrfs_disk_key
*key
)
1462 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1465 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1466 struct btrfs_dir_item
*item
,
1467 struct btrfs_disk_key
*key
)
1469 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1472 /* struct btrfs_disk_key */
1473 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1475 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1476 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1478 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1479 struct btrfs_disk_key
*disk
)
1481 cpu
->offset
= le64_to_cpu(disk
->offset
);
1482 cpu
->type
= disk
->type
;
1483 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1486 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1487 struct btrfs_key
*cpu
)
1489 disk
->offset
= cpu_to_le64(cpu
->offset
);
1490 disk
->type
= cpu
->type
;
1491 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1494 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1495 struct btrfs_key
*key
, int nr
)
1497 struct btrfs_disk_key disk_key
;
1498 btrfs_node_key(eb
, &disk_key
, nr
);
1499 btrfs_disk_key_to_cpu(key
, &disk_key
);
1502 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1503 struct btrfs_key
*key
, int nr
)
1505 struct btrfs_disk_key disk_key
;
1506 btrfs_item_key(eb
, &disk_key
, nr
);
1507 btrfs_disk_key_to_cpu(key
, &disk_key
);
1510 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1511 struct btrfs_dir_item
*item
,
1512 struct btrfs_key
*key
)
1514 struct btrfs_disk_key disk_key
;
1515 btrfs_dir_item_key(eb
, item
, &disk_key
);
1516 btrfs_disk_key_to_cpu(key
, &disk_key
);
1520 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1525 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1530 /* struct btrfs_header */
1531 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1532 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1534 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1535 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1536 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1537 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1539 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1541 return (btrfs_header_flags(eb
) & flag
) == flag
;
1544 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1546 u64 flags
= btrfs_header_flags(eb
);
1547 btrfs_set_header_flags(eb
, flags
| flag
);
1548 return (flags
& flag
) == flag
;
1551 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1553 u64 flags
= btrfs_header_flags(eb
);
1554 btrfs_set_header_flags(eb
, flags
& ~flag
);
1555 return (flags
& flag
) == flag
;
1558 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1560 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1564 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1566 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1570 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1572 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1576 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1578 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1582 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1587 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1592 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1597 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1599 return btrfs_header_level(eb
) == 0;
1602 /* struct btrfs_root_item */
1603 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1605 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1606 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1607 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1609 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1611 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1612 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1613 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1614 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1615 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1616 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1617 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1618 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1621 /* struct btrfs_super_block */
1623 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1624 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1625 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1627 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1628 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1629 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1630 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1631 struct btrfs_super_block
, chunk_root_generation
, 64);
1632 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1634 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1636 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1637 chunk_root_level
, 8);
1638 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1640 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1641 log_root_transid
, 64);
1642 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1644 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1646 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1648 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1650 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1652 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1654 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1656 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1657 root_dir_objectid
, 64);
1658 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1660 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1662 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1664 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1665 incompat_flags
, 64);
1666 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1669 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1671 int t
= btrfs_super_csum_type(s
);
1672 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1673 return btrfs_csum_sizes
[t
];
1676 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1678 return offsetof(struct btrfs_leaf
, items
);
1681 /* struct btrfs_file_extent_item */
1682 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1684 static inline unsigned long
1685 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
1687 unsigned long offset
= (unsigned long)e
;
1688 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1692 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1694 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1697 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1699 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1701 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1702 disk_num_bytes
, 64);
1703 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1705 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1707 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1709 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1711 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1713 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1714 other_encoding
, 16);
1716 /* this returns the number of file bytes represented by the inline item.
1717 * If an item is compressed, this is the uncompressed size
1719 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1720 struct btrfs_file_extent_item
*e
)
1722 return btrfs_file_extent_ram_bytes(eb
, e
);
1726 * this returns the number of bytes used by the item on disk, minus the
1727 * size of any extent headers. If a file is compressed on disk, this is
1728 * the compressed size
1730 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1731 struct btrfs_item
*e
)
1733 unsigned long offset
;
1734 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1735 return btrfs_item_size(eb
, e
) - offset
;
1738 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1740 return sb
->s_fs_info
;
1743 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1744 const char *name
, int len
)
1746 /* if we already have a name just free it */
1749 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1753 memcpy(root
->name
, name
, len
);
1754 root
->name
[len
] = '\0';
1759 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
1762 return root
->leafsize
;
1763 return root
->nodesize
;
1766 /* helper function to cast into the data area of the leaf. */
1767 #define btrfs_item_ptr(leaf, slot, type) \
1768 ((type *)(btrfs_leaf_data(leaf) + \
1769 btrfs_item_offset_nr(leaf, slot)))
1771 #define btrfs_item_ptr_offset(leaf, slot) \
1772 ((unsigned long)(btrfs_leaf_data(leaf) + \
1773 btrfs_item_offset_nr(leaf, slot)))
1775 static inline struct dentry
*fdentry(struct file
*file
)
1777 return file
->f_path
.dentry
;
1781 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
1782 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
1783 struct btrfs_root
*root
, unsigned long count
);
1784 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1785 int btrfs_update_pinned_extents(struct btrfs_root
*root
,
1786 u64 bytenr
, u64 num
, int pin
);
1787 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
1788 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1789 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
1790 struct btrfs_root
*root
, u64 objectid
, u64 bytenr
);
1791 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1792 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
1793 struct btrfs_fs_info
*info
,
1795 u64
btrfs_find_block_group(struct btrfs_root
*root
,
1796 u64 search_start
, u64 search_hint
, int owner
);
1797 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1798 struct btrfs_root
*root
,
1799 u32 blocksize
, u64 parent
,
1805 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
1806 struct btrfs_root
*root
,
1807 u64 bytenr
, u32 blocksize
,
1809 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1810 struct btrfs_root
*root
,
1811 u64 num_bytes
, u64 parent
, u64 min_bytes
,
1812 u64 root_objectid
, u64 ref_generation
,
1813 u64 owner
, u64 empty_size
, u64 hint_byte
,
1814 u64 search_end
, struct btrfs_key
*ins
, u64 data
);
1815 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle
*trans
,
1816 struct btrfs_root
*root
, u64 parent
,
1817 u64 root_objectid
, u64 ref_generation
,
1818 u64 owner
, struct btrfs_key
*ins
);
1819 int btrfs_alloc_logged_extent(struct btrfs_trans_handle
*trans
,
1820 struct btrfs_root
*root
, u64 parent
,
1821 u64 root_objectid
, u64 ref_generation
,
1822 u64 owner
, struct btrfs_key
*ins
);
1823 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
1824 struct btrfs_root
*root
,
1825 u64 num_bytes
, u64 min_alloc_size
,
1826 u64 empty_size
, u64 hint_byte
,
1827 u64 search_end
, struct btrfs_key
*ins
,
1829 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1830 struct extent_buffer
*orig_buf
, struct extent_buffer
*buf
,
1832 int btrfs_cache_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1833 struct extent_buffer
*buf
, u32 nr_extents
);
1834 int btrfs_update_ref(struct btrfs_trans_handle
*trans
,
1835 struct btrfs_root
*root
, struct extent_buffer
*orig_buf
,
1836 struct extent_buffer
*buf
, int start_slot
, int nr
);
1837 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
1838 struct btrfs_root
*root
,
1839 u64 bytenr
, u64 num_bytes
, u64 parent
,
1840 u64 root_objectid
, u64 ref_generation
,
1841 u64 owner_objectid
, int pin
);
1842 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1843 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1844 struct btrfs_root
*root
,
1845 struct extent_io_tree
*unpin
);
1846 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1847 struct btrfs_root
*root
,
1848 u64 bytenr
, u64 num_bytes
, u64 parent
,
1849 u64 root_objectid
, u64 ref_generation
,
1850 u64 owner_objectid
);
1851 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1852 struct btrfs_root
*root
, u64 bytenr
, u64 num_bytes
,
1853 u64 orig_parent
, u64 parent
,
1854 u64 root_objectid
, u64 ref_generation
,
1855 u64 owner_objectid
);
1856 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1857 struct btrfs_root
*root
);
1858 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
1859 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1860 int btrfs_read_block_groups(struct btrfs_root
*root
);
1861 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1862 struct btrfs_root
*root
, u64 bytes_used
,
1863 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1865 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
1866 struct btrfs_root
*root
, u64 group_start
);
1867 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
1868 int btrfs_free_reloc_root(struct btrfs_trans_handle
*trans
,
1869 struct btrfs_root
*root
);
1870 int btrfs_drop_dead_reloc_roots(struct btrfs_root
*root
);
1871 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle
*trans
,
1872 struct btrfs_root
*root
,
1873 struct extent_buffer
*buf
, u64 orig_start
);
1874 int btrfs_add_dead_reloc_root(struct btrfs_root
*root
);
1875 int btrfs_cleanup_reloc_trees(struct btrfs_root
*root
);
1876 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
1877 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
1878 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
1879 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
1881 int btrfs_check_metadata_free_space(struct btrfs_root
*root
);
1882 int btrfs_check_data_free_space(struct btrfs_root
*root
, struct inode
*inode
,
1884 void btrfs_free_reserved_data_space(struct btrfs_root
*root
,
1885 struct inode
*inode
, u64 bytes
);
1886 void btrfs_delalloc_reserve_space(struct btrfs_root
*root
, struct inode
*inode
,
1888 void btrfs_delalloc_free_space(struct btrfs_root
*root
, struct inode
*inode
,
1891 int btrfs_previous_item(struct btrfs_root
*root
,
1892 struct btrfs_path
*path
, u64 min_objectid
,
1894 int btrfs_merge_path(struct btrfs_trans_handle
*trans
,
1895 struct btrfs_root
*root
,
1896 struct btrfs_key
*node_keys
,
1897 u64
*nodes
, int lowest_level
);
1898 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1899 struct btrfs_root
*root
, struct btrfs_path
*path
,
1900 struct btrfs_key
*new_key
);
1901 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
1902 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
1903 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
1904 struct btrfs_key
*key
, int lowest_level
,
1905 int cache_only
, u64 min_trans
);
1906 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
1907 struct btrfs_key
*max_key
,
1908 struct btrfs_path
*path
, int cache_only
,
1910 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1911 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1912 struct extent_buffer
*parent
, int parent_slot
,
1913 struct extent_buffer
**cow_ret
);
1914 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1915 struct btrfs_root
*root
,
1916 struct extent_buffer
*buf
,
1917 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1918 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1919 *root
, struct btrfs_path
*path
, u32 data_size
);
1920 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1921 struct btrfs_root
*root
,
1922 struct btrfs_path
*path
,
1923 u32 new_size
, int from_end
);
1924 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
1925 struct btrfs_root
*root
,
1926 struct btrfs_path
*path
,
1927 struct btrfs_key
*new_key
,
1928 unsigned long split_offset
);
1929 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1930 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1932 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1933 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1934 int start_slot
, int cache_only
, u64
*last_ret
,
1935 struct btrfs_key
*progress
);
1936 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1937 struct btrfs_path
*btrfs_alloc_path(void);
1938 void btrfs_free_path(struct btrfs_path
*p
);
1939 void btrfs_set_path_blocking(struct btrfs_path
*p
);
1940 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
1942 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1943 struct btrfs_path
*path
, int slot
, int nr
);
1944 int btrfs_del_leaf(struct btrfs_trans_handle
*trans
,
1945 struct btrfs_root
*root
,
1946 struct btrfs_path
*path
, u64 bytenr
);
1947 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1948 struct btrfs_root
*root
,
1949 struct btrfs_path
*path
)
1951 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1954 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1955 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1956 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
1957 struct btrfs_root
*root
,
1958 struct btrfs_path
*path
,
1959 struct btrfs_key
*cpu_key
, u32
*data_size
,
1961 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1962 struct btrfs_root
*root
,
1963 struct btrfs_path
*path
,
1964 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1966 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1967 struct btrfs_root
*root
,
1968 struct btrfs_path
*path
,
1969 struct btrfs_key
*key
,
1972 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1975 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1976 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1977 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1978 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1980 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
1981 struct btrfs_root
*root
,
1982 struct extent_buffer
*node
,
1983 struct extent_buffer
*parent
);
1985 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
1986 struct btrfs_path
*path
,
1987 u64 root_id
, u64 ref_id
);
1988 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
1989 struct btrfs_root
*tree_root
,
1990 u64 root_id
, u8 type
, u64 ref_id
,
1991 u64 dirid
, u64 sequence
,
1992 const char *name
, int name_len
);
1993 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1994 struct btrfs_key
*key
);
1995 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1996 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1998 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1999 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2001 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2002 btrfs_root_item
*item
, struct btrfs_key
*key
);
2003 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
2004 u64
*found_objectid
);
2005 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
2006 struct btrfs_root
*latest_root
);
2008 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2009 struct btrfs_root
*root
, const char *name
,
2010 int name_len
, u64 dir
,
2011 struct btrfs_key
*location
, u8 type
, u64 index
);
2012 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2013 struct btrfs_root
*root
,
2014 struct btrfs_path
*path
, u64 dir
,
2015 const char *name
, int name_len
,
2017 struct btrfs_dir_item
*
2018 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2019 struct btrfs_root
*root
,
2020 struct btrfs_path
*path
, u64 dir
,
2021 u64 objectid
, const char *name
, int name_len
,
2023 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2024 struct btrfs_path
*path
,
2025 const char *name
, int name_len
);
2026 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2027 struct btrfs_root
*root
,
2028 struct btrfs_path
*path
,
2029 struct btrfs_dir_item
*di
);
2030 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2031 struct btrfs_root
*root
, const char *name
,
2032 u16 name_len
, const void *data
, u16 data_len
,
2034 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2035 struct btrfs_root
*root
,
2036 struct btrfs_path
*path
, u64 dir
,
2037 const char *name
, u16 name_len
,
2041 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2042 struct btrfs_root
*root
, u64 offset
);
2043 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2044 struct btrfs_root
*root
, u64 offset
);
2047 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2048 struct btrfs_root
*fs_root
,
2049 u64 dirid
, u64
*objectid
);
2050 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2053 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2054 struct btrfs_root
*root
,
2055 const char *name
, int name_len
,
2056 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2057 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2058 struct btrfs_root
*root
,
2059 const char *name
, int name_len
,
2060 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2061 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2062 struct btrfs_root
*root
,
2063 struct btrfs_path
*path
, u64 objectid
);
2064 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2065 *root
, struct btrfs_path
*path
,
2066 struct btrfs_key
*location
, int mod
);
2069 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2070 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2071 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2072 struct bio
*bio
, u32
*dst
);
2073 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2074 struct btrfs_root
*root
,
2075 u64 objectid
, u64 pos
,
2076 u64 disk_offset
, u64 disk_num_bytes
,
2077 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2078 u8 compression
, u8 encryption
, u16 other_encoding
);
2079 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2080 struct btrfs_root
*root
,
2081 struct btrfs_path
*path
, u64 objectid
,
2082 u64 bytenr
, int mod
);
2083 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2084 struct btrfs_root
*root
,
2085 struct btrfs_ordered_sum
*sums
);
2086 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2087 struct bio
*bio
, u64 file_start
, int contig
);
2088 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
2089 u64 start
, unsigned long len
);
2090 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2091 struct btrfs_root
*root
,
2092 struct btrfs_path
*path
,
2093 u64 bytenr
, int cow
);
2094 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2095 struct btrfs_root
*root
, struct btrfs_path
*path
,
2097 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
2098 u64 end
, struct list_head
*list
);
2101 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2102 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2103 #define ClearPageChecked ClearPageFsMisc
2104 #define SetPageChecked SetPageFsMisc
2105 #define PageChecked PageFsMisc
2108 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2109 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2110 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2111 struct btrfs_root
*root
,
2112 struct inode
*dir
, struct inode
*inode
,
2113 const char *name
, int name_len
);
2114 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2115 struct inode
*parent_inode
, struct inode
*inode
,
2116 const char *name
, int name_len
, int add_backref
, u64 index
);
2117 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2118 struct btrfs_root
*root
,
2119 struct inode
*inode
, u64 new_size
,
2122 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
);
2123 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
);
2124 int btrfs_writepages(struct address_space
*mapping
,
2125 struct writeback_control
*wbc
);
2126 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2127 struct btrfs_root
*new_root
, struct dentry
*dentry
,
2128 u64 new_dirid
, u64 alloc_hint
);
2129 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2130 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2132 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2133 struct file_ra_state
*ra
, struct file
*file
,
2134 pgoff_t offset
, pgoff_t last_index
);
2135 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
2136 int btrfs_readpage(struct file
*file
, struct page
*page
);
2137 void btrfs_delete_inode(struct inode
*inode
);
2138 void btrfs_put_inode(struct inode
*inode
);
2139 void btrfs_read_locked_inode(struct inode
*inode
);
2140 int btrfs_write_inode(struct inode
*inode
, int wait
);
2141 void btrfs_dirty_inode(struct inode
*inode
);
2142 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2143 void btrfs_destroy_inode(struct inode
*inode
);
2144 int btrfs_init_cachep(void);
2145 void btrfs_destroy_cachep(void);
2146 long btrfs_ioctl_trans_end(struct file
*file
);
2147 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
2148 struct btrfs_root
*root
, int wait
);
2149 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
2150 struct btrfs_root
*root
);
2151 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2152 struct btrfs_root
*root
, int *is_new
);
2153 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2154 unsigned from
, unsigned to
);
2155 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2156 size_t page_offset
, u64 start
, u64 end
,
2158 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2159 struct btrfs_root
*root
,
2160 struct inode
*inode
);
2161 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2162 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2163 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
2164 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
2167 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2170 int btrfs_sync_file(struct file
*file
, struct dentry
*dentry
, int datasync
);
2171 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2173 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2174 extern struct file_operations btrfs_file_operations
;
2175 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
2176 struct btrfs_root
*root
, struct inode
*inode
,
2177 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
2178 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2179 struct btrfs_root
*root
,
2180 struct inode
*inode
, u64 start
, u64 end
);
2181 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2184 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2185 struct btrfs_root
*root
, int cache_only
);
2188 int btrfs_init_sysfs(void);
2189 void btrfs_exit_sysfs(void);
2190 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2191 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2192 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2193 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2196 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2199 u64
btrfs_parse_size(char *str
);
2200 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2201 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2204 int btrfs_check_acl(struct inode
*inode
, int mask
);
2205 int btrfs_init_acl(struct inode
*inode
, struct inode
*dir
);
2206 int btrfs_acl_chmod(struct inode
*inode
);