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)
147 * block layout. objectid corresonds to the inode number. The flags
148 * tells us things about the object, and is a kind of stream selector.
149 * so for a given inode, keys with flags of 1 might refer to the inode
150 * data, flags of 2 may point to file data in the btree and flags == 3
151 * may point to extents.
153 * offset is the starting byte offset for this key in the stream.
155 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
156 * in cpu native order. Otherwise they are identical and their sizes
157 * should be the same (ie both packed)
159 struct btrfs_disk_key
{
163 } __attribute__ ((__packed__
));
169 } __attribute__ ((__packed__
));
171 struct btrfs_mapping_tree
{
172 struct extent_map_tree map_tree
;
175 #define BTRFS_UUID_SIZE 16
176 struct btrfs_dev_item
{
177 /* the internal btrfs device id */
180 /* size of the device */
186 /* optimal io alignment for this device */
189 /* optimal io width for this device */
192 /* minimal io size for this device */
195 /* type and info about this device */
198 /* expected generation for this device */
202 * starting byte of this partition on the device,
203 * to allowr for stripe alignment in the future
207 /* grouping information for allocation decisions */
210 /* seek speed 0-100 where 100 is fastest */
213 /* bandwidth 0-100 where 100 is fastest */
216 /* btrfs generated uuid for this device */
217 u8 uuid
[BTRFS_UUID_SIZE
];
219 /* uuid of FS who owns this device */
220 u8 fsid
[BTRFS_UUID_SIZE
];
221 } __attribute__ ((__packed__
));
223 struct btrfs_stripe
{
226 u8 dev_uuid
[BTRFS_UUID_SIZE
];
227 } __attribute__ ((__packed__
));
230 /* size of this chunk in bytes */
233 /* objectid of the root referencing this chunk */
239 /* optimal io alignment for this chunk */
242 /* optimal io width for this chunk */
245 /* minimal io size for this chunk */
248 /* 2^16 stripes is quite a lot, a second limit is the size of a single
253 /* sub stripes only matter for raid10 */
255 struct btrfs_stripe stripe
;
256 /* additional stripes go here */
257 } __attribute__ ((__packed__
));
259 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
261 BUG_ON(num_stripes
== 0);
262 return sizeof(struct btrfs_chunk
) +
263 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
266 #define BTRFS_FSID_SIZE 16
267 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
270 * every tree block (leaf or node) starts with this header.
272 struct btrfs_header
{
273 /* these first four must match the super block */
274 u8 csum
[BTRFS_CSUM_SIZE
];
275 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
276 __le64 bytenr
; /* which block this node is supposed to live in */
279 /* allowed to be different from the super from here on down */
280 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
285 } __attribute__ ((__packed__
));
287 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
288 sizeof(struct btrfs_header)) / \
289 sizeof(struct btrfs_key_ptr))
290 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
291 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
292 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
293 sizeof(struct btrfs_item) - \
294 sizeof(struct btrfs_file_extent_item))
296 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
299 * this is a very generous portion of the super block, giving us
300 * room to translate 14 chunks with 3 stripes each.
302 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
303 #define BTRFS_LABEL_SIZE 256
306 * the super block basically lists the main trees of the FS
307 * it currently lacks any block count etc etc
309 struct btrfs_super_block
{
310 u8 csum
[BTRFS_CSUM_SIZE
];
311 /* the first 4 fields must match struct btrfs_header */
312 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
313 __le64 bytenr
; /* this block number */
316 /* allowed to be different from the btrfs_header from here own down */
323 /* this will help find the new super based on the log root */
324 __le64 log_root_transid
;
327 __le64 root_dir_objectid
;
333 __le32 sys_chunk_array_size
;
334 __le64 chunk_root_generation
;
336 __le64 compat_ro_flags
;
337 __le64 incompat_flags
;
342 struct btrfs_dev_item dev_item
;
344 char label
[BTRFS_LABEL_SIZE
];
346 /* future expansion */
348 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
349 } __attribute__ ((__packed__
));
352 * Compat flags that we support. If any incompat flags are set other than the
353 * ones specified below then we will fail to mount
355 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
356 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
357 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
360 * A leaf is full of items. offset and size tell us where to find
361 * the item in the leaf (relative to the start of the data area)
364 struct btrfs_disk_key key
;
367 } __attribute__ ((__packed__
));
370 * leaves have an item area and a data area:
371 * [item0, item1....itemN] [free space] [dataN...data1, data0]
373 * The data is separate from the items to get the keys closer together
377 struct btrfs_header header
;
378 struct btrfs_item items
[];
379 } __attribute__ ((__packed__
));
382 * all non-leaf blocks are nodes, they hold only keys and pointers to
385 struct btrfs_key_ptr
{
386 struct btrfs_disk_key key
;
389 } __attribute__ ((__packed__
));
392 struct btrfs_header header
;
393 struct btrfs_key_ptr ptrs
[];
394 } __attribute__ ((__packed__
));
397 * btrfs_paths remember the path taken from the root down to the leaf.
398 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
399 * to any other levels that are present.
401 * The slots array records the index of the item or block pointer
402 * used while walking the tree.
405 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
406 int slots
[BTRFS_MAX_LEVEL
];
407 /* if there is real range locking, this locks field will change */
408 int locks
[BTRFS_MAX_LEVEL
];
410 /* keep some upper locks as we walk down */
414 * set by btrfs_split_item, tells search_slot to keep all locks
415 * and to force calls to keep space in the nodes
417 unsigned int search_for_split
:1;
418 unsigned int keep_locks
:1;
419 unsigned int skip_locking
:1;
420 unsigned int leave_spinning
:1;
424 * items in the extent btree are used to record the objectid of the
425 * owner of the block and the number of references
427 struct btrfs_extent_item
{
429 } __attribute__ ((__packed__
));
431 struct btrfs_extent_ref
{
436 } __attribute__ ((__packed__
));
438 /* dev extents record free space on individual devices. The owner
439 * field points back to the chunk allocation mapping tree that allocated
440 * the extent. The chunk tree uuid field is a way to double check the owner
442 struct btrfs_dev_extent
{
444 __le64 chunk_objectid
;
447 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
448 } __attribute__ ((__packed__
));
450 struct btrfs_inode_ref
{
454 } __attribute__ ((__packed__
));
456 struct btrfs_timespec
{
459 } __attribute__ ((__packed__
));
461 enum btrfs_compression_type
{
462 BTRFS_COMPRESS_NONE
= 0,
463 BTRFS_COMPRESS_ZLIB
= 1,
464 BTRFS_COMPRESS_LAST
= 2,
467 struct btrfs_inode_item
{
468 /* nfs style generation number */
470 /* transid that last touched this inode */
482 /* modification sequence number for NFS */
486 * a little future expansion, for more than this we can
487 * just grow the inode item and version it
490 struct btrfs_timespec atime
;
491 struct btrfs_timespec ctime
;
492 struct btrfs_timespec mtime
;
493 struct btrfs_timespec otime
;
494 } __attribute__ ((__packed__
));
496 struct btrfs_dir_log_item
{
498 } __attribute__ ((__packed__
));
500 struct btrfs_dir_item
{
501 struct btrfs_disk_key location
;
506 } __attribute__ ((__packed__
));
508 struct btrfs_root_item
{
509 struct btrfs_inode_item inode
;
515 __le64 last_snapshot
;
518 struct btrfs_disk_key drop_progress
;
521 } __attribute__ ((__packed__
));
524 * this is used for both forward and backward root refs
526 struct btrfs_root_ref
{
530 } __attribute__ ((__packed__
));
532 #define BTRFS_FILE_EXTENT_INLINE 0
533 #define BTRFS_FILE_EXTENT_REG 1
534 #define BTRFS_FILE_EXTENT_PREALLOC 2
536 struct btrfs_file_extent_item
{
538 * transaction id that created this extent
542 * max number of bytes to hold this extent in ram
543 * when we split a compressed extent we can't know how big
544 * each of the resulting pieces will be. So, this is
545 * an upper limit on the size of the extent in ram instead of
551 * 32 bits for the various ways we might encode the data,
552 * including compression and encryption. If any of these
553 * are set to something a given disk format doesn't understand
554 * it is treated like an incompat flag for reading and writing,
559 __le16 other_encoding
; /* spare for later use */
561 /* are we inline data or a real extent? */
565 * disk space consumed by the extent, checksum blocks are included
569 __le64 disk_num_bytes
;
571 * the logical offset in file blocks (no csums)
572 * this extent record is for. This allows a file extent to point
573 * into the middle of an existing extent on disk, sharing it
574 * between two snapshots (useful if some bytes in the middle of the
575 * extent have changed
579 * the logical number of file blocks (no csums included). This
580 * always reflects the size uncompressed and without encoding.
584 } __attribute__ ((__packed__
));
586 struct btrfs_csum_item
{
588 } __attribute__ ((__packed__
));
590 /* different types of block groups (and chunks) */
591 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
592 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
593 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
594 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
595 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
596 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
597 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
599 struct btrfs_block_group_item
{
601 __le64 chunk_objectid
;
603 } __attribute__ ((__packed__
));
605 struct btrfs_space_info
{
608 u64 total_bytes
; /* total bytes in the space */
609 u64 bytes_used
; /* total bytes used on disk */
610 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
611 transaction finishes */
612 u64 bytes_reserved
; /* total bytes the allocator has reserved for
613 current allocations */
614 u64 bytes_readonly
; /* total bytes that are read only */
616 /* delalloc accounting */
617 u64 bytes_delalloc
; /* number of bytes reserved for allocation,
618 this space is not necessarily reserved yet
620 u64 bytes_may_use
; /* number of bytes that may be used for
623 int full
; /* indicates that we cannot allocate any more
624 chunks for this space */
625 int force_alloc
; /* set if we need to force a chunk alloc for
628 struct list_head list
;
630 /* for block groups in our same type */
631 struct list_head block_groups
;
633 struct rw_semaphore groups_sem
;
636 struct btrfs_free_space
{
637 struct rb_node bytes_index
;
638 struct rb_node offset_index
;
643 struct btrfs_block_group_cache
{
644 struct btrfs_key key
;
645 struct btrfs_block_group_item item
;
647 struct mutex cache_mutex
;
655 struct btrfs_space_info
*space_info
;
657 /* free space cache stuff */
658 spinlock_t tree_lock
;
659 struct rb_root free_space_bytes
;
660 struct rb_root free_space_offset
;
662 /* block group cache stuff */
663 struct rb_node cache_node
;
665 /* for block groups in the same raid type */
666 struct list_head list
;
672 struct btrfs_leaf_ref_tree
{
674 struct list_head list
;
679 struct btrfs_fs_devices
;
680 struct btrfs_fs_info
{
681 u8 fsid
[BTRFS_FSID_SIZE
];
682 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
683 struct btrfs_root
*extent_root
;
684 struct btrfs_root
*tree_root
;
685 struct btrfs_root
*chunk_root
;
686 struct btrfs_root
*dev_root
;
687 struct btrfs_root
*fs_root
;
688 struct btrfs_root
*csum_root
;
690 /* the log root tree is a directory of all the other log roots */
691 struct btrfs_root
*log_root_tree
;
692 struct radix_tree_root fs_roots_radix
;
694 /* block group cache stuff */
695 spinlock_t block_group_cache_lock
;
696 struct rb_root block_group_cache_tree
;
698 struct extent_io_tree pinned_extents
;
700 /* logical->physical extent mapping */
701 struct btrfs_mapping_tree mapping_tree
;
704 u64 last_trans_committed
;
707 * this is updated to the current trans every time a full commit
708 * is required instead of the faster short fsync log commits
710 u64 last_trans_log_full_commit
;
711 u64 open_ioctl_trans
;
712 unsigned long mount_opt
;
716 struct btrfs_transaction
*running_transaction
;
717 wait_queue_head_t transaction_throttle
;
718 wait_queue_head_t transaction_wait
;
719 wait_queue_head_t async_submit_wait
;
721 struct btrfs_super_block super_copy
;
722 struct btrfs_super_block super_for_commit
;
723 struct block_device
*__bdev
;
724 struct super_block
*sb
;
725 struct inode
*btree_inode
;
726 struct backing_dev_info bdi
;
727 struct mutex trans_mutex
;
728 struct mutex tree_log_mutex
;
729 struct mutex transaction_kthread_mutex
;
730 struct mutex cleaner_mutex
;
731 struct mutex chunk_mutex
;
732 struct mutex drop_mutex
;
733 struct mutex volume_mutex
;
734 struct mutex tree_reloc_mutex
;
737 * this protects the ordered operations list only while we are
738 * processing all of the entries on it. This way we make
739 * sure the commit code doesn't find the list temporarily empty
740 * because another function happens to be doing non-waiting preflush
741 * before jumping into the main commit.
743 struct mutex ordered_operations_mutex
;
745 struct list_head trans_list
;
746 struct list_head hashers
;
747 struct list_head dead_roots
;
749 atomic_t nr_async_submits
;
750 atomic_t async_submit_draining
;
751 atomic_t nr_async_bios
;
752 atomic_t async_delalloc_pages
;
755 * this is used by the balancing code to wait for all the pending
758 spinlock_t ordered_extent_lock
;
761 * all of the data=ordered extents pending writeback
762 * these can span multiple transactions and basically include
763 * every dirty data page that isn't from nodatacow
765 struct list_head ordered_extents
;
768 * all of the inodes that have delalloc bytes. It is possible for
769 * this list to be empty even when there is still dirty data=ordered
770 * extents waiting to finish IO.
772 struct list_head delalloc_inodes
;
775 * special rename and truncate targets that must be on disk before
776 * we're allowed to commit. This is basically the ext3 style
779 struct list_head ordered_operations
;
782 * there is a pool of worker threads for checksumming during writes
783 * and a pool for checksumming after reads. This is because readers
784 * can run with FS locks held, and the writers may be waiting for
785 * those locks. We don't want ordering in the pending list to cause
786 * deadlocks, and so the two are serviced separately.
788 * A third pool does submit_bio to avoid deadlocking with the other
791 struct btrfs_workers workers
;
792 struct btrfs_workers delalloc_workers
;
793 struct btrfs_workers endio_workers
;
794 struct btrfs_workers endio_meta_workers
;
795 struct btrfs_workers endio_meta_write_workers
;
796 struct btrfs_workers endio_write_workers
;
797 struct btrfs_workers submit_workers
;
799 * fixup workers take dirty pages that didn't properly go through
800 * the cow mechanism and make them safe to write. It happens
801 * for the sys_munmap function call path
803 struct btrfs_workers fixup_workers
;
804 struct task_struct
*transaction_kthread
;
805 struct task_struct
*cleaner_kthread
;
806 int thread_pool_size
;
808 /* tree relocation relocated fields */
809 struct list_head dead_reloc_roots
;
810 struct btrfs_leaf_ref_tree reloc_ref_tree
;
811 struct btrfs_leaf_ref_tree shared_ref_tree
;
813 struct kobject super_kobj
;
814 struct completion kobj_unregister
;
817 int log_root_recovering
;
819 atomic_t throttle_gen
;
823 /* protected by the delalloc lock, used to keep from writing
824 * metadata until there is a nice batch
826 u64 dirty_metadata_bytes
;
827 struct list_head dirty_cowonly_roots
;
829 struct btrfs_fs_devices
*fs_devices
;
832 * the space_info list is almost entirely read only. It only changes
833 * when we add a new raid type to the FS, and that happens
834 * very rarely. RCU is used to protect it.
836 struct list_head space_info
;
838 spinlock_t delalloc_lock
;
839 spinlock_t new_trans_lock
;
844 spinlock_t ref_cache_lock
;
845 u64 total_ref_cache_size
;
847 u64 avail_data_alloc_bits
;
848 u64 avail_metadata_alloc_bits
;
849 u64 avail_system_alloc_bits
;
850 u64 data_alloc_profile
;
851 u64 metadata_alloc_profile
;
852 u64 system_alloc_profile
;
858 * in ram representation of the tree. extent_root is used for all allocations
859 * and for the extent tree extent_root root.
861 struct btrfs_dirty_root
;
863 struct extent_buffer
*node
;
865 /* the node lock is held while changing the node pointer */
866 spinlock_t node_lock
;
868 struct extent_buffer
*commit_root
;
869 struct btrfs_leaf_ref_tree
*ref_tree
;
870 struct btrfs_leaf_ref_tree ref_tree_struct
;
871 struct btrfs_dirty_root
*dirty_root
;
872 struct btrfs_root
*log_root
;
873 struct btrfs_root
*reloc_root
;
875 struct btrfs_root_item root_item
;
876 struct btrfs_key root_key
;
877 struct btrfs_fs_info
*fs_info
;
878 struct extent_io_tree dirty_log_pages
;
880 struct kobject root_kobj
;
881 struct completion kobj_unregister
;
882 struct mutex objectid_mutex
;
884 struct mutex log_mutex
;
885 wait_queue_head_t log_writer_wait
;
886 wait_queue_head_t log_commit_wait
[2];
887 atomic_t log_writers
;
888 atomic_t log_commit
[2];
889 unsigned long log_transid
;
890 unsigned long log_batch
;
895 /* data allocations are done in sectorsize units */
898 /* node allocations are done in nodesize units */
901 /* leaf allocations are done in leafsize units */
908 u64 last_inode_alloc
;
911 u64 defrag_trans_start
;
912 struct btrfs_key defrag_progress
;
913 struct btrfs_key defrag_max
;
919 /* the dirty list is only used by non-reference counted roots */
920 struct list_head dirty_list
;
922 spinlock_t list_lock
;
923 struct list_head dead_list
;
924 struct list_head orphan_list
;
927 * right now this just gets used so that a root has its own devid
928 * for stat. It may be used for more later
930 struct super_block anon_super
;
935 * inode items have the data typically returned from stat and store other
936 * info about object characteristics. There is one for every file and dir in
939 #define BTRFS_INODE_ITEM_KEY 1
940 #define BTRFS_INODE_REF_KEY 12
941 #define BTRFS_XATTR_ITEM_KEY 24
942 #define BTRFS_ORPHAN_ITEM_KEY 48
943 /* reserve 2-15 close to the inode for later flexibility */
946 * dir items are the name -> inode pointers in a directory. There is one
947 * for every name in a directory.
949 #define BTRFS_DIR_LOG_ITEM_KEY 60
950 #define BTRFS_DIR_LOG_INDEX_KEY 72
951 #define BTRFS_DIR_ITEM_KEY 84
952 #define BTRFS_DIR_INDEX_KEY 96
954 * extent data is for file data
956 #define BTRFS_EXTENT_DATA_KEY 108
959 * extent csums are stored in a separate tree and hold csums for
960 * an entire extent on disk.
962 #define BTRFS_EXTENT_CSUM_KEY 128
965 * root items point to tree roots. There are typically in the root
966 * tree used by the super block to find all the other trees
968 #define BTRFS_ROOT_ITEM_KEY 132
971 * root backrefs tie subvols and snapshots to the directory entries that
974 #define BTRFS_ROOT_BACKREF_KEY 144
977 * root refs make a fast index for listing all of the snapshots and
978 * subvolumes referenced by a given root. They point directly to the
979 * directory item in the root that references the subvol
981 #define BTRFS_ROOT_REF_KEY 156
984 * extent items are in the extent map tree. These record which blocks
985 * are used, and how many references there are to each block
987 #define BTRFS_EXTENT_ITEM_KEY 168
988 #define BTRFS_EXTENT_REF_KEY 180
991 * block groups give us hints into the extent allocation trees. Which
992 * blocks are free etc etc
994 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
996 #define BTRFS_DEV_EXTENT_KEY 204
997 #define BTRFS_DEV_ITEM_KEY 216
998 #define BTRFS_CHUNK_ITEM_KEY 228
1001 * string items are for debugging. They just store a short string of
1004 #define BTRFS_STRING_ITEM_KEY 253
1006 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1007 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1008 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1009 #define BTRFS_MOUNT_SSD (1 << 3)
1010 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1011 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1013 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1014 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1015 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1020 #define BTRFS_INODE_NODATASUM (1 << 0)
1021 #define BTRFS_INODE_NODATACOW (1 << 1)
1022 #define BTRFS_INODE_READONLY (1 << 2)
1023 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1024 #define BTRFS_INODE_PREALLOC (1 << 4)
1025 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
1026 ~BTRFS_INODE_##flag)
1027 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
1029 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
1031 /* some macros to generate set/get funcs for the struct fields. This
1032 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1035 #define le8_to_cpu(v) (v)
1036 #define cpu_to_le8(v) (v)
1039 #define read_eb_member(eb, ptr, type, member, result) ( \
1040 read_extent_buffer(eb, (char *)(result), \
1041 ((unsigned long)(ptr)) + \
1042 offsetof(type, member), \
1043 sizeof(((type *)0)->member)))
1045 #define write_eb_member(eb, ptr, type, member, result) ( \
1046 write_extent_buffer(eb, (char *)(result), \
1047 ((unsigned long)(ptr)) + \
1048 offsetof(type, member), \
1049 sizeof(((type *)0)->member)))
1051 #ifndef BTRFS_SETGET_FUNCS
1052 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1053 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1054 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1057 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1058 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1060 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1061 u##bits res = le##bits##_to_cpu(p->member); \
1062 kunmap_atomic(p, KM_USER0); \
1065 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1068 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1069 p->member = cpu_to_le##bits(val); \
1070 kunmap_atomic(p, KM_USER0); \
1073 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1074 static inline u##bits btrfs_##name(type *s) \
1076 return le##bits##_to_cpu(s->member); \
1078 static inline void btrfs_set_##name(type *s, u##bits val) \
1080 s->member = cpu_to_le##bits(val); \
1083 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1084 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1085 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1086 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1087 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1088 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1090 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1091 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1092 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1093 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1094 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1095 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1097 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1098 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1100 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1102 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1104 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1106 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1108 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1109 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1111 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1113 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1115 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1118 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1120 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1123 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1125 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1128 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1129 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1130 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1131 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1132 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1133 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1134 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1135 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1136 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1137 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1138 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1140 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1142 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1145 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1146 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1147 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1149 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1151 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1153 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1155 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1156 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1158 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1160 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1161 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1163 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1166 unsigned long offset
= (unsigned long)c
;
1167 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1168 offset
+= nr
* sizeof(struct btrfs_stripe
);
1169 return (struct btrfs_stripe
*)offset
;
1172 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1174 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1177 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1178 struct btrfs_chunk
*c
, int nr
)
1180 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1183 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1184 struct btrfs_chunk
*c
, int nr
,
1187 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1190 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1191 struct btrfs_chunk
*c
, int nr
)
1193 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1196 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1197 struct btrfs_chunk
*c
, int nr
,
1200 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1203 /* struct btrfs_block_group_item */
1204 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1206 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1208 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1209 struct btrfs_block_group_item
, chunk_objectid
, 64);
1211 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1212 struct btrfs_block_group_item
, chunk_objectid
, 64);
1213 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1214 struct btrfs_block_group_item
, flags
, 64);
1215 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1216 struct btrfs_block_group_item
, flags
, 64);
1218 /* struct btrfs_inode_ref */
1219 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1220 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1222 /* struct btrfs_inode_item */
1223 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1224 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1225 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1226 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1227 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1228 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1229 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1230 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1231 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1232 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1233 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1234 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1236 static inline struct btrfs_timespec
*
1237 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1239 unsigned long ptr
= (unsigned long)inode_item
;
1240 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1241 return (struct btrfs_timespec
*)ptr
;
1244 static inline struct btrfs_timespec
*
1245 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1247 unsigned long ptr
= (unsigned long)inode_item
;
1248 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1249 return (struct btrfs_timespec
*)ptr
;
1252 static inline struct btrfs_timespec
*
1253 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1255 unsigned long ptr
= (unsigned long)inode_item
;
1256 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1257 return (struct btrfs_timespec
*)ptr
;
1260 static inline struct btrfs_timespec
*
1261 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1263 unsigned long ptr
= (unsigned long)inode_item
;
1264 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1265 return (struct btrfs_timespec
*)ptr
;
1268 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1269 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1271 /* struct btrfs_dev_extent */
1272 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1274 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1275 chunk_objectid
, 64);
1276 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1278 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1280 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1282 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1283 return (u8
*)((unsigned long)dev
+ ptr
);
1286 /* struct btrfs_extent_ref */
1287 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
1288 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
1289 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
1290 BTRFS_SETGET_FUNCS(ref_num_refs
, struct btrfs_extent_ref
, num_refs
, 32);
1292 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
1293 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
1295 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
1297 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs
, struct btrfs_extent_ref
,
1300 /* struct btrfs_extent_item */
1301 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
1302 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
1305 /* struct btrfs_node */
1306 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1307 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1309 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1312 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1313 sizeof(struct btrfs_key_ptr
) * nr
;
1314 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1317 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1321 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1322 sizeof(struct btrfs_key_ptr
) * nr
;
1323 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1326 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1329 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1330 sizeof(struct btrfs_key_ptr
) * nr
;
1331 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1334 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1338 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1339 sizeof(struct btrfs_key_ptr
) * nr
;
1340 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1343 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1345 return offsetof(struct btrfs_node
, ptrs
) +
1346 sizeof(struct btrfs_key_ptr
) * nr
;
1349 void btrfs_node_key(struct extent_buffer
*eb
,
1350 struct btrfs_disk_key
*disk_key
, int nr
);
1352 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1353 struct btrfs_disk_key
*disk_key
, int nr
)
1356 ptr
= btrfs_node_key_ptr_offset(nr
);
1357 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1358 struct btrfs_key_ptr
, key
, disk_key
);
1361 /* struct btrfs_item */
1362 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1363 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1365 static inline unsigned long btrfs_item_nr_offset(int nr
)
1367 return offsetof(struct btrfs_leaf
, items
) +
1368 sizeof(struct btrfs_item
) * nr
;
1371 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1374 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1377 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1378 struct btrfs_item
*item
)
1380 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1383 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1385 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1388 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1390 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1393 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1395 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1398 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1399 struct btrfs_disk_key
*disk_key
, int nr
)
1401 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1402 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1405 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1406 struct btrfs_disk_key
*disk_key
, int nr
)
1408 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1409 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1412 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1415 * struct btrfs_root_ref
1417 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1418 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1419 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1421 /* struct btrfs_dir_item */
1422 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1423 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1424 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1425 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1427 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1428 struct btrfs_dir_item
*item
,
1429 struct btrfs_disk_key
*key
)
1431 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1434 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1435 struct btrfs_dir_item
*item
,
1436 struct btrfs_disk_key
*key
)
1438 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1441 /* struct btrfs_disk_key */
1442 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1444 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1445 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1447 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1448 struct btrfs_disk_key
*disk
)
1450 cpu
->offset
= le64_to_cpu(disk
->offset
);
1451 cpu
->type
= disk
->type
;
1452 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1455 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1456 struct btrfs_key
*cpu
)
1458 disk
->offset
= cpu_to_le64(cpu
->offset
);
1459 disk
->type
= cpu
->type
;
1460 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1463 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1464 struct btrfs_key
*key
, int nr
)
1466 struct btrfs_disk_key disk_key
;
1467 btrfs_node_key(eb
, &disk_key
, nr
);
1468 btrfs_disk_key_to_cpu(key
, &disk_key
);
1471 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1472 struct btrfs_key
*key
, int nr
)
1474 struct btrfs_disk_key disk_key
;
1475 btrfs_item_key(eb
, &disk_key
, nr
);
1476 btrfs_disk_key_to_cpu(key
, &disk_key
);
1479 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1480 struct btrfs_dir_item
*item
,
1481 struct btrfs_key
*key
)
1483 struct btrfs_disk_key disk_key
;
1484 btrfs_dir_item_key(eb
, item
, &disk_key
);
1485 btrfs_disk_key_to_cpu(key
, &disk_key
);
1489 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1494 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1499 /* struct btrfs_header */
1500 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1501 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1503 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1504 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1505 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1506 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1508 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1510 return (btrfs_header_flags(eb
) & flag
) == flag
;
1513 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1515 u64 flags
= btrfs_header_flags(eb
);
1516 btrfs_set_header_flags(eb
, flags
| flag
);
1517 return (flags
& flag
) == flag
;
1520 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1522 u64 flags
= btrfs_header_flags(eb
);
1523 btrfs_set_header_flags(eb
, flags
& ~flag
);
1524 return (flags
& flag
) == flag
;
1527 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1529 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1533 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1535 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1539 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1541 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1545 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1547 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1551 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1556 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1561 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1566 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1568 return btrfs_header_level(eb
) == 0;
1571 /* struct btrfs_root_item */
1572 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1574 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1575 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1576 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1578 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1580 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1581 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1582 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1583 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1584 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1585 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1586 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1587 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1590 /* struct btrfs_super_block */
1592 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1593 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1594 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1596 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1597 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1598 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1599 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1600 struct btrfs_super_block
, chunk_root_generation
, 64);
1601 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1603 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1605 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1606 chunk_root_level
, 8);
1607 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1609 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1610 log_root_transid
, 64);
1611 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1613 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1615 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1617 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1619 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1621 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1623 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1625 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1626 root_dir_objectid
, 64);
1627 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1629 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1631 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1633 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1634 incompat_flags
, 64);
1635 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1638 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1640 int t
= btrfs_super_csum_type(s
);
1641 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1642 return btrfs_csum_sizes
[t
];
1645 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1647 return offsetof(struct btrfs_leaf
, items
);
1650 /* struct btrfs_file_extent_item */
1651 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1653 static inline unsigned long
1654 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
1656 unsigned long offset
= (unsigned long)e
;
1657 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1661 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1663 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1666 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1668 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1670 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1671 disk_num_bytes
, 64);
1672 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1674 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1676 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1678 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1680 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1682 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1683 other_encoding
, 16);
1685 /* this returns the number of file bytes represented by the inline item.
1686 * If an item is compressed, this is the uncompressed size
1688 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1689 struct btrfs_file_extent_item
*e
)
1691 return btrfs_file_extent_ram_bytes(eb
, e
);
1695 * this returns the number of bytes used by the item on disk, minus the
1696 * size of any extent headers. If a file is compressed on disk, this is
1697 * the compressed size
1699 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1700 struct btrfs_item
*e
)
1702 unsigned long offset
;
1703 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1704 return btrfs_item_size(eb
, e
) - offset
;
1707 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1709 return sb
->s_fs_info
;
1712 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1713 const char *name
, int len
)
1715 /* if we already have a name just free it */
1718 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1722 memcpy(root
->name
, name
, len
);
1723 root
->name
[len
] = '\0';
1728 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
1731 return root
->leafsize
;
1732 return root
->nodesize
;
1735 /* helper function to cast into the data area of the leaf. */
1736 #define btrfs_item_ptr(leaf, slot, type) \
1737 ((type *)(btrfs_leaf_data(leaf) + \
1738 btrfs_item_offset_nr(leaf, slot)))
1740 #define btrfs_item_ptr_offset(leaf, slot) \
1741 ((unsigned long)(btrfs_leaf_data(leaf) + \
1742 btrfs_item_offset_nr(leaf, slot)))
1744 static inline struct dentry
*fdentry(struct file
*file
)
1746 return file
->f_path
.dentry
;
1750 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
1751 struct btrfs_root
*root
, unsigned long count
);
1752 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1753 int btrfs_update_pinned_extents(struct btrfs_root
*root
,
1754 u64 bytenr
, u64 num
, int pin
);
1755 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
1756 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1757 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
1758 struct btrfs_root
*root
, u64 objectid
, u64 bytenr
);
1759 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1760 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
1761 struct btrfs_fs_info
*info
,
1763 u64
btrfs_find_block_group(struct btrfs_root
*root
,
1764 u64 search_start
, u64 search_hint
, int owner
);
1765 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1766 struct btrfs_root
*root
,
1767 u32 blocksize
, u64 parent
,
1773 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
1774 struct btrfs_root
*root
,
1775 u64 bytenr
, u32 blocksize
,
1777 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1778 struct btrfs_root
*root
,
1779 u64 num_bytes
, u64 parent
, u64 min_bytes
,
1780 u64 root_objectid
, u64 ref_generation
,
1781 u64 owner
, u64 empty_size
, u64 hint_byte
,
1782 u64 search_end
, struct btrfs_key
*ins
, u64 data
);
1783 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle
*trans
,
1784 struct btrfs_root
*root
, u64 parent
,
1785 u64 root_objectid
, u64 ref_generation
,
1786 u64 owner
, struct btrfs_key
*ins
);
1787 int btrfs_alloc_logged_extent(struct btrfs_trans_handle
*trans
,
1788 struct btrfs_root
*root
, u64 parent
,
1789 u64 root_objectid
, u64 ref_generation
,
1790 u64 owner
, struct btrfs_key
*ins
);
1791 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
1792 struct btrfs_root
*root
,
1793 u64 num_bytes
, u64 min_alloc_size
,
1794 u64 empty_size
, u64 hint_byte
,
1795 u64 search_end
, struct btrfs_key
*ins
,
1797 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1798 struct extent_buffer
*orig_buf
, struct extent_buffer
*buf
,
1800 int btrfs_cache_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1801 struct extent_buffer
*buf
, u32 nr_extents
);
1802 int btrfs_update_ref(struct btrfs_trans_handle
*trans
,
1803 struct btrfs_root
*root
, struct extent_buffer
*orig_buf
,
1804 struct extent_buffer
*buf
, int start_slot
, int nr
);
1805 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
1806 struct btrfs_root
*root
,
1807 u64 bytenr
, u64 num_bytes
, u64 parent
,
1808 u64 root_objectid
, u64 ref_generation
,
1809 u64 owner_objectid
, int pin
);
1810 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1811 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1812 struct btrfs_root
*root
,
1813 struct extent_io_tree
*unpin
);
1814 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1815 struct btrfs_root
*root
,
1816 u64 bytenr
, u64 num_bytes
, u64 parent
,
1817 u64 root_objectid
, u64 ref_generation
,
1818 u64 owner_objectid
);
1819 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1820 struct btrfs_root
*root
, u64 bytenr
, u64 num_bytes
,
1821 u64 orig_parent
, u64 parent
,
1822 u64 root_objectid
, u64 ref_generation
,
1823 u64 owner_objectid
);
1824 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1825 struct btrfs_root
*root
);
1826 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
1827 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1828 int btrfs_read_block_groups(struct btrfs_root
*root
);
1829 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1830 struct btrfs_root
*root
, u64 bytes_used
,
1831 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1833 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
1834 struct btrfs_root
*root
, u64 group_start
);
1835 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
1836 int btrfs_free_reloc_root(struct btrfs_trans_handle
*trans
,
1837 struct btrfs_root
*root
);
1838 int btrfs_drop_dead_reloc_roots(struct btrfs_root
*root
);
1839 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle
*trans
,
1840 struct btrfs_root
*root
,
1841 struct extent_buffer
*buf
, u64 orig_start
);
1842 int btrfs_add_dead_reloc_root(struct btrfs_root
*root
);
1843 int btrfs_cleanup_reloc_trees(struct btrfs_root
*root
);
1844 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
1845 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
1846 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
1847 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
1849 int btrfs_check_metadata_free_space(struct btrfs_root
*root
);
1850 int btrfs_check_data_free_space(struct btrfs_root
*root
, struct inode
*inode
,
1852 void btrfs_free_reserved_data_space(struct btrfs_root
*root
,
1853 struct inode
*inode
, u64 bytes
);
1854 void btrfs_delalloc_reserve_space(struct btrfs_root
*root
, struct inode
*inode
,
1856 void btrfs_delalloc_free_space(struct btrfs_root
*root
, struct inode
*inode
,
1859 int btrfs_previous_item(struct btrfs_root
*root
,
1860 struct btrfs_path
*path
, u64 min_objectid
,
1862 int btrfs_merge_path(struct btrfs_trans_handle
*trans
,
1863 struct btrfs_root
*root
,
1864 struct btrfs_key
*node_keys
,
1865 u64
*nodes
, int lowest_level
);
1866 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1867 struct btrfs_root
*root
, struct btrfs_path
*path
,
1868 struct btrfs_key
*new_key
);
1869 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
1870 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
1871 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
1872 struct btrfs_key
*key
, int lowest_level
,
1873 int cache_only
, u64 min_trans
);
1874 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
1875 struct btrfs_key
*max_key
,
1876 struct btrfs_path
*path
, int cache_only
,
1878 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1879 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1880 struct extent_buffer
*parent
, int parent_slot
,
1881 struct extent_buffer
**cow_ret
);
1882 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1883 struct btrfs_root
*root
,
1884 struct extent_buffer
*buf
,
1885 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1886 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1887 *root
, struct btrfs_path
*path
, u32 data_size
);
1888 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1889 struct btrfs_root
*root
,
1890 struct btrfs_path
*path
,
1891 u32 new_size
, int from_end
);
1892 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
1893 struct btrfs_root
*root
,
1894 struct btrfs_path
*path
,
1895 struct btrfs_key
*new_key
,
1896 unsigned long split_offset
);
1897 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1898 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1900 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1901 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1902 int start_slot
, int cache_only
, u64
*last_ret
,
1903 struct btrfs_key
*progress
);
1904 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1905 struct btrfs_path
*btrfs_alloc_path(void);
1906 void btrfs_free_path(struct btrfs_path
*p
);
1907 void btrfs_set_path_blocking(struct btrfs_path
*p
);
1908 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
1910 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1911 struct btrfs_path
*path
, int slot
, int nr
);
1912 int btrfs_del_leaf(struct btrfs_trans_handle
*trans
,
1913 struct btrfs_root
*root
,
1914 struct btrfs_path
*path
, u64 bytenr
);
1915 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1916 struct btrfs_root
*root
,
1917 struct btrfs_path
*path
)
1919 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1922 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1923 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1924 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
1925 struct btrfs_root
*root
,
1926 struct btrfs_path
*path
,
1927 struct btrfs_key
*cpu_key
, u32
*data_size
,
1929 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1930 struct btrfs_root
*root
,
1931 struct btrfs_path
*path
,
1932 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1934 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1935 struct btrfs_root
*root
,
1936 struct btrfs_path
*path
,
1937 struct btrfs_key
*key
,
1940 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1943 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1944 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1945 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1946 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1948 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
1949 struct btrfs_root
*root
,
1950 struct extent_buffer
*node
,
1951 struct extent_buffer
*parent
);
1953 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
1954 struct btrfs_path
*path
,
1955 u64 root_id
, u64 ref_id
);
1956 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
1957 struct btrfs_root
*tree_root
,
1958 u64 root_id
, u8 type
, u64 ref_id
,
1959 u64 dirid
, u64 sequence
,
1960 const char *name
, int name_len
);
1961 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1962 struct btrfs_key
*key
);
1963 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1964 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1966 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1967 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1969 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1970 btrfs_root_item
*item
, struct btrfs_key
*key
);
1971 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
1972 u64
*found_objectid
);
1973 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1974 struct btrfs_root
*latest_root
);
1976 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
1977 struct btrfs_root
*root
, const char *name
,
1978 int name_len
, u64 dir
,
1979 struct btrfs_key
*location
, u8 type
, u64 index
);
1980 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1981 struct btrfs_root
*root
,
1982 struct btrfs_path
*path
, u64 dir
,
1983 const char *name
, int name_len
,
1985 struct btrfs_dir_item
*
1986 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1987 struct btrfs_root
*root
,
1988 struct btrfs_path
*path
, u64 dir
,
1989 u64 objectid
, const char *name
, int name_len
,
1991 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1992 struct btrfs_path
*path
,
1993 const char *name
, int name_len
);
1994 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1995 struct btrfs_root
*root
,
1996 struct btrfs_path
*path
,
1997 struct btrfs_dir_item
*di
);
1998 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1999 struct btrfs_root
*root
, const char *name
,
2000 u16 name_len
, const void *data
, u16 data_len
,
2002 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2003 struct btrfs_root
*root
,
2004 struct btrfs_path
*path
, u64 dir
,
2005 const char *name
, u16 name_len
,
2009 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2010 struct btrfs_root
*root
, u64 offset
);
2011 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2012 struct btrfs_root
*root
, u64 offset
);
2015 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2016 struct btrfs_root
*fs_root
,
2017 u64 dirid
, u64
*objectid
);
2018 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2021 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2022 struct btrfs_root
*root
,
2023 const char *name
, int name_len
,
2024 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2025 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2026 struct btrfs_root
*root
,
2027 const char *name
, int name_len
,
2028 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2029 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2030 struct btrfs_root
*root
,
2031 struct btrfs_path
*path
, u64 objectid
);
2032 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2033 *root
, struct btrfs_path
*path
,
2034 struct btrfs_key
*location
, int mod
);
2037 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2038 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2039 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2040 struct bio
*bio
, u32
*dst
);
2041 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2042 struct btrfs_root
*root
,
2043 u64 objectid
, u64 pos
,
2044 u64 disk_offset
, u64 disk_num_bytes
,
2045 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2046 u8 compression
, u8 encryption
, u16 other_encoding
);
2047 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2048 struct btrfs_root
*root
,
2049 struct btrfs_path
*path
, u64 objectid
,
2050 u64 bytenr
, int mod
);
2051 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2052 struct btrfs_root
*root
,
2053 struct btrfs_ordered_sum
*sums
);
2054 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2055 struct bio
*bio
, u64 file_start
, int contig
);
2056 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
2057 u64 start
, unsigned long len
);
2058 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2059 struct btrfs_root
*root
,
2060 struct btrfs_path
*path
,
2061 u64 bytenr
, int cow
);
2062 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2063 struct btrfs_root
*root
, struct btrfs_path
*path
,
2065 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
2066 u64 end
, struct list_head
*list
);
2069 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2070 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2071 #define ClearPageChecked ClearPageFsMisc
2072 #define SetPageChecked SetPageFsMisc
2073 #define PageChecked PageFsMisc
2076 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2077 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2078 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2079 struct btrfs_root
*root
,
2080 struct inode
*dir
, struct inode
*inode
,
2081 const char *name
, int name_len
);
2082 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2083 struct inode
*parent_inode
, struct inode
*inode
,
2084 const char *name
, int name_len
, int add_backref
, u64 index
);
2085 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2086 struct btrfs_root
*root
,
2087 struct inode
*inode
, u64 new_size
,
2090 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
);
2091 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
);
2092 int btrfs_writepages(struct address_space
*mapping
,
2093 struct writeback_control
*wbc
);
2094 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2095 struct btrfs_root
*new_root
, struct dentry
*dentry
,
2096 u64 new_dirid
, u64 alloc_hint
);
2097 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2098 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2100 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2101 struct file_ra_state
*ra
, struct file
*file
,
2102 pgoff_t offset
, pgoff_t last_index
);
2103 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
2104 int btrfs_readpage(struct file
*file
, struct page
*page
);
2105 void btrfs_delete_inode(struct inode
*inode
);
2106 void btrfs_put_inode(struct inode
*inode
);
2107 void btrfs_read_locked_inode(struct inode
*inode
);
2108 int btrfs_write_inode(struct inode
*inode
, int wait
);
2109 void btrfs_dirty_inode(struct inode
*inode
);
2110 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2111 void btrfs_destroy_inode(struct inode
*inode
);
2112 int btrfs_init_cachep(void);
2113 void btrfs_destroy_cachep(void);
2114 long btrfs_ioctl_trans_end(struct file
*file
);
2115 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
2116 struct btrfs_root
*root
, int wait
);
2117 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
2118 struct btrfs_root
*root
);
2119 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2120 struct btrfs_root
*root
, int *is_new
);
2121 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2122 unsigned from
, unsigned to
);
2123 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2124 size_t page_offset
, u64 start
, u64 end
,
2126 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2127 struct btrfs_root
*root
,
2128 struct inode
*inode
);
2129 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2130 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2131 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
2132 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
2135 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2138 int btrfs_sync_file(struct file
*file
, struct dentry
*dentry
, int datasync
);
2139 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2141 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2142 extern struct file_operations btrfs_file_operations
;
2143 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
2144 struct btrfs_root
*root
, struct inode
*inode
,
2145 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
2146 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2147 struct btrfs_root
*root
,
2148 struct inode
*inode
, u64 start
, u64 end
);
2149 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2152 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2153 struct btrfs_root
*root
, int cache_only
);
2156 int btrfs_init_sysfs(void);
2157 void btrfs_exit_sysfs(void);
2158 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2159 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2160 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2161 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2164 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2167 u64
btrfs_parse_size(char *str
);
2168 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2169 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2172 int btrfs_check_acl(struct inode
*inode
, int mask
);
2173 int btrfs_init_acl(struct inode
*inode
, struct inode
*dir
);
2174 int btrfs_acl_chmod(struct inode
*inode
);
2176 /* free-space-cache.c */
2177 int btrfs_add_free_space(struct btrfs_block_group_cache
*block_group
,
2178 u64 bytenr
, u64 size
);
2179 int btrfs_remove_free_space(struct btrfs_block_group_cache
*block_group
,
2180 u64 bytenr
, u64 size
);
2181 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
2183 u64
btrfs_find_space_for_alloc(struct btrfs_block_group_cache
*block_group
,
2184 u64 offset
, u64 bytes
, u64 empty_size
);
2185 void btrfs_dump_free_space(struct btrfs_block_group_cache
*block_group
,
2187 u64
btrfs_block_group_free_space(struct btrfs_block_group_cache
*block_group
);