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)
47 # define BTRFS_MAX_LEVEL 7
49 # define BTRFS_MAX_LEVEL 8
52 /* holds pointers to all of the tree roots */
53 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
55 /* stores information about which extents are in use, and reference counts */
56 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
59 * chunk tree stores translations from logical -> physical block numbering
60 * the super block points to the chunk tree
62 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
65 * stores information about which areas of a given device are in use.
66 * one per device. The tree of tree roots points to the device tree
68 #define BTRFS_DEV_TREE_OBJECTID 4ULL
70 /* one per subvolume, storing files and directories */
71 #define BTRFS_FS_TREE_OBJECTID 5ULL
73 /* directory objectid inside the root tree */
74 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
76 /* holds checksums of all the data extents */
77 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
79 /* orhpan objectid for tracking unlinked/truncated files */
80 #define BTRFS_ORPHAN_OBJECTID -5ULL
82 /* does write ahead logging to speed up fsyncs */
83 #define BTRFS_TREE_LOG_OBJECTID -6ULL
84 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
86 /* for space balancing */
87 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
88 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
91 * extent checksums all have this objectid
92 * this allows them to share the logging tree
95 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
97 /* dummy objectid represents multiple objectids */
98 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
101 * All files have objectids in this range.
103 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
104 #define BTRFS_LAST_FREE_OBJECTID -256ULL
105 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
109 * the device items go into the chunk tree. The key is in the form
110 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
112 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
115 * we can actually store much bigger names, but lets not confuse the rest
118 #define BTRFS_NAME_LEN 255
120 /* 32 bytes in various csum fields */
121 #define BTRFS_CSUM_SIZE 32
124 #define BTRFS_CSUM_TYPE_CRC32 0
126 static int btrfs_csum_sizes
[] = { 4, 0 };
128 /* four bytes for CRC32 */
129 //#define BTRFS_CRC32_SIZE 4
130 #define BTRFS_EMPTY_DIR_SIZE 0
132 #define BTRFS_FT_UNKNOWN 0
133 #define BTRFS_FT_REG_FILE 1
134 #define BTRFS_FT_DIR 2
135 #define BTRFS_FT_CHRDEV 3
136 #define BTRFS_FT_BLKDEV 4
137 #define BTRFS_FT_FIFO 5
138 #define BTRFS_FT_SOCK 6
139 #define BTRFS_FT_SYMLINK 7
140 #define BTRFS_FT_XATTR 8
141 #define BTRFS_FT_MAX 9
144 * the key defines the order in the tree, and so it also defines (optimal)
145 * block layout. objectid corresonds to the inode number. The flags
146 * tells us things about the object, and is a kind of stream selector.
147 * so for a given inode, keys with flags of 1 might refer to the inode
148 * data, flags of 2 may point to file data in the btree and flags == 3
149 * may point to extents.
151 * offset is the starting byte offset for this key in the stream.
153 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
154 * in cpu native order. Otherwise they are identical and their sizes
155 * should be the same (ie both packed)
157 struct btrfs_disk_key
{
161 } __attribute__ ((__packed__
));
167 } __attribute__ ((__packed__
));
169 struct btrfs_mapping_tree
{
170 struct extent_map_tree map_tree
;
173 #define BTRFS_UUID_SIZE 16
174 struct btrfs_dev_item
{
175 /* the internal btrfs device id */
178 /* size of the device */
184 /* optimal io alignment for this device */
187 /* optimal io width for this device */
190 /* minimal io size for this device */
193 /* type and info about this device */
196 /* expected generation for this device */
200 * starting byte of this partition on the device,
201 * to allowr for stripe alignment in the future
205 /* grouping information for allocation decisions */
208 /* seek speed 0-100 where 100 is fastest */
211 /* bandwidth 0-100 where 100 is fastest */
214 /* btrfs generated uuid for this device */
215 u8 uuid
[BTRFS_UUID_SIZE
];
217 /* uuid of FS who owns this device */
218 u8 fsid
[BTRFS_UUID_SIZE
];
219 } __attribute__ ((__packed__
));
221 struct btrfs_stripe
{
224 u8 dev_uuid
[BTRFS_UUID_SIZE
];
225 } __attribute__ ((__packed__
));
228 /* size of this chunk in bytes */
231 /* objectid of the root referencing this chunk */
237 /* optimal io alignment for this chunk */
240 /* optimal io width for this chunk */
243 /* minimal io size for this chunk */
246 /* 2^16 stripes is quite a lot, a second limit is the size of a single
251 /* sub stripes only matter for raid10 */
253 struct btrfs_stripe stripe
;
254 /* additional stripes go here */
255 } __attribute__ ((__packed__
));
257 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
259 BUG_ON(num_stripes
== 0);
260 return sizeof(struct btrfs_chunk
) +
261 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
264 #define BTRFS_FSID_SIZE 16
265 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
268 * every tree block (leaf or node) starts with this header.
270 struct btrfs_header
{
271 /* these first four must match the super block */
272 u8 csum
[BTRFS_CSUM_SIZE
];
273 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
274 __le64 bytenr
; /* which block this node is supposed to live in */
277 /* allowed to be different from the super from here on down */
278 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
283 } __attribute__ ((__packed__
));
285 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
286 sizeof(struct btrfs_header)) / \
287 sizeof(struct btrfs_key_ptr))
288 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
289 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
290 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
291 sizeof(struct btrfs_item) - \
292 sizeof(struct btrfs_file_extent_item))
294 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
297 * this is a very generous portion of the super block, giving us
298 * room to translate 14 chunks with 3 stripes each.
300 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
301 #define BTRFS_LABEL_SIZE 256
304 * the super block basically lists the main trees of the FS
305 * it currently lacks any block count etc etc
307 struct btrfs_super_block
{
308 u8 csum
[BTRFS_CSUM_SIZE
];
309 /* the first 4 fields must match struct btrfs_header */
310 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
311 __le64 bytenr
; /* this block number */
314 /* allowed to be different from the btrfs_header from here own down */
321 /* this will help find the new super based on the log root */
322 __le64 log_root_transid
;
325 __le64 root_dir_objectid
;
331 __le32 sys_chunk_array_size
;
332 __le64 chunk_root_generation
;
334 __le64 compat_ro_flags
;
335 __le64 incompat_flags
;
340 struct btrfs_dev_item dev_item
;
342 char label
[BTRFS_LABEL_SIZE
];
344 /* future expansion */
346 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
347 } __attribute__ ((__packed__
));
350 * Compat flags that we support. If any incompat flags are set other than the
351 * ones specified below then we will fail to mount
353 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
354 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
355 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
358 * A leaf is full of items. offset and size tell us where to find
359 * the item in the leaf (relative to the start of the data area)
362 struct btrfs_disk_key key
;
365 } __attribute__ ((__packed__
));
368 * leaves have an item area and a data area:
369 * [item0, item1....itemN] [free space] [dataN...data1, data0]
371 * The data is separate from the items to get the keys closer together
375 struct btrfs_header header
;
376 struct btrfs_item items
[];
377 } __attribute__ ((__packed__
));
380 * all non-leaf blocks are nodes, they hold only keys and pointers to
383 struct btrfs_key_ptr
{
384 struct btrfs_disk_key key
;
387 } __attribute__ ((__packed__
));
390 struct btrfs_header header
;
391 struct btrfs_key_ptr ptrs
[];
392 } __attribute__ ((__packed__
));
395 * btrfs_paths remember the path taken from the root down to the leaf.
396 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
397 * to any other levels that are present.
399 * The slots array records the index of the item or block pointer
400 * used while walking the tree.
403 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
404 int slots
[BTRFS_MAX_LEVEL
];
405 /* if there is real range locking, this locks field will change */
406 int locks
[BTRFS_MAX_LEVEL
];
408 /* 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 int search_for_split
;
421 * items in the extent btree are used to record the objectid of the
422 * owner of the block and the number of references
424 struct btrfs_extent_item
{
426 } __attribute__ ((__packed__
));
428 struct btrfs_extent_ref
{
433 } __attribute__ ((__packed__
));
435 /* dev extents record free space on individual devices. The owner
436 * field points back to the chunk allocation mapping tree that allocated
437 * the extent. The chunk tree uuid field is a way to double check the owner
439 struct btrfs_dev_extent
{
441 __le64 chunk_objectid
;
444 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
445 } __attribute__ ((__packed__
));
447 struct btrfs_inode_ref
{
451 } __attribute__ ((__packed__
));
453 struct btrfs_timespec
{
456 } __attribute__ ((__packed__
));
459 BTRFS_COMPRESS_NONE
= 0,
460 BTRFS_COMPRESS_ZLIB
= 1,
461 BTRFS_COMPRESS_LAST
= 2,
462 } btrfs_compression_type
;
464 /* we don't understand any encryption methods right now */
466 BTRFS_ENCRYPTION_NONE
= 0,
467 BTRFS_ENCRYPTION_LAST
= 1,
468 } btrfs_encryption_type
;
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
{
617 struct list_head list
;
619 /* for block groups in our same type */
620 struct list_head block_groups
;
622 struct rw_semaphore groups_sem
;
625 struct btrfs_free_space
{
626 struct rb_node bytes_index
;
627 struct rb_node offset_index
;
632 struct btrfs_block_group_cache
{
633 struct btrfs_key key
;
634 struct btrfs_block_group_item item
;
636 struct mutex alloc_mutex
;
637 struct mutex cache_mutex
;
645 struct btrfs_space_info
*space_info
;
647 /* free space cache stuff */
648 struct rb_root free_space_bytes
;
649 struct rb_root free_space_offset
;
651 /* block group cache stuff */
652 struct rb_node cache_node
;
654 /* for block groups in the same raid type */
655 struct list_head list
;
661 struct btrfs_leaf_ref_tree
{
663 struct list_head list
;
668 struct btrfs_fs_devices
;
669 struct btrfs_fs_info
{
670 u8 fsid
[BTRFS_FSID_SIZE
];
671 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
672 struct btrfs_root
*extent_root
;
673 struct btrfs_root
*tree_root
;
674 struct btrfs_root
*chunk_root
;
675 struct btrfs_root
*dev_root
;
676 struct btrfs_root
*fs_root
;
677 struct btrfs_root
*csum_root
;
679 /* the log root tree is a directory of all the other log roots */
680 struct btrfs_root
*log_root_tree
;
681 struct radix_tree_root fs_roots_radix
;
683 /* block group cache stuff */
684 spinlock_t block_group_cache_lock
;
685 struct rb_root block_group_cache_tree
;
687 struct extent_io_tree pinned_extents
;
688 struct extent_io_tree pending_del
;
689 struct extent_io_tree extent_ins
;
691 /* logical->physical extent mapping */
692 struct btrfs_mapping_tree mapping_tree
;
695 u64 last_trans_committed
;
696 u64 last_trans_new_blockgroup
;
697 u64 open_ioctl_trans
;
698 unsigned long mount_opt
;
702 struct btrfs_transaction
*running_transaction
;
703 wait_queue_head_t transaction_throttle
;
704 wait_queue_head_t transaction_wait
;
706 wait_queue_head_t async_submit_wait
;
707 wait_queue_head_t tree_log_wait
;
709 struct btrfs_super_block super_copy
;
710 struct btrfs_super_block super_for_commit
;
711 struct block_device
*__bdev
;
712 struct super_block
*sb
;
713 struct inode
*btree_inode
;
714 struct backing_dev_info bdi
;
715 spinlock_t hash_lock
;
716 struct mutex trans_mutex
;
717 struct mutex tree_log_mutex
;
718 struct mutex transaction_kthread_mutex
;
719 struct mutex cleaner_mutex
;
720 struct mutex extent_ins_mutex
;
721 struct mutex pinned_mutex
;
722 struct mutex chunk_mutex
;
723 struct mutex drop_mutex
;
724 struct mutex volume_mutex
;
725 struct mutex tree_reloc_mutex
;
726 struct list_head trans_list
;
727 struct list_head hashers
;
728 struct list_head dead_roots
;
730 atomic_t nr_async_submits
;
731 atomic_t async_submit_draining
;
732 atomic_t nr_async_bios
;
733 atomic_t async_delalloc_pages
;
734 atomic_t tree_log_writers
;
735 atomic_t tree_log_commit
;
736 unsigned long tree_log_batch
;
737 u64 tree_log_transid
;
740 * this is used by the balancing code to wait for all the pending
743 spinlock_t ordered_extent_lock
;
744 struct list_head ordered_extents
;
745 struct list_head delalloc_inodes
;
748 * there is a pool of worker threads for checksumming during writes
749 * and a pool for checksumming after reads. This is because readers
750 * can run with FS locks held, and the writers may be waiting for
751 * those locks. We don't want ordering in the pending list to cause
752 * deadlocks, and so the two are serviced separately.
754 * A third pool does submit_bio to avoid deadlocking with the other
757 struct btrfs_workers workers
;
758 struct btrfs_workers delalloc_workers
;
759 struct btrfs_workers endio_workers
;
760 struct btrfs_workers endio_meta_workers
;
761 struct btrfs_workers endio_meta_write_workers
;
762 struct btrfs_workers endio_write_workers
;
763 struct btrfs_workers submit_workers
;
765 * fixup workers take dirty pages that didn't properly go through
766 * the cow mechanism and make them safe to write. It happens
767 * for the sys_munmap function call path
769 struct btrfs_workers fixup_workers
;
770 struct task_struct
*transaction_kthread
;
771 struct task_struct
*cleaner_kthread
;
772 int thread_pool_size
;
774 /* tree relocation relocated fields */
775 struct list_head dead_reloc_roots
;
776 struct btrfs_leaf_ref_tree reloc_ref_tree
;
777 struct btrfs_leaf_ref_tree shared_ref_tree
;
779 struct kobject super_kobj
;
780 struct completion kobj_unregister
;
783 int log_root_recovering
;
785 atomic_t throttle_gen
;
788 struct list_head dirty_cowonly_roots
;
790 struct btrfs_fs_devices
*fs_devices
;
791 struct list_head space_info
;
792 spinlock_t delalloc_lock
;
793 spinlock_t new_trans_lock
;
798 spinlock_t ref_cache_lock
;
799 u64 total_ref_cache_size
;
801 u64 avail_data_alloc_bits
;
802 u64 avail_metadata_alloc_bits
;
803 u64 avail_system_alloc_bits
;
804 u64 data_alloc_profile
;
805 u64 metadata_alloc_profile
;
806 u64 system_alloc_profile
;
812 * in ram representation of the tree. extent_root is used for all allocations
813 * and for the extent tree extent_root root.
815 struct btrfs_dirty_root
;
817 struct extent_buffer
*node
;
819 /* the node lock is held while changing the node pointer */
820 spinlock_t node_lock
;
822 struct extent_buffer
*commit_root
;
823 struct btrfs_leaf_ref_tree
*ref_tree
;
824 struct btrfs_leaf_ref_tree ref_tree_struct
;
825 struct btrfs_dirty_root
*dirty_root
;
826 struct btrfs_root
*log_root
;
827 struct btrfs_root
*reloc_root
;
829 struct btrfs_root_item root_item
;
830 struct btrfs_key root_key
;
831 struct btrfs_fs_info
*fs_info
;
832 struct extent_io_tree dirty_log_pages
;
834 struct kobject root_kobj
;
835 struct completion kobj_unregister
;
836 struct mutex objectid_mutex
;
837 struct mutex log_mutex
;
842 /* data allocations are done in sectorsize units */
845 /* node allocations are done in nodesize units */
848 /* leaf allocations are done in leafsize units */
855 u64 last_inode_alloc
;
858 u64 defrag_trans_start
;
859 struct btrfs_key defrag_progress
;
860 struct btrfs_key defrag_max
;
866 /* the dirty list is only used by non-reference counted roots */
867 struct list_head dirty_list
;
869 spinlock_t list_lock
;
870 struct list_head dead_list
;
871 struct list_head orphan_list
;
874 * right now this just gets used so that a root has its own devid
875 * for stat. It may be used for more later
877 struct super_block anon_super
;
882 * inode items have the data typically returned from stat and store other
883 * info about object characteristics. There is one for every file and dir in
886 #define BTRFS_INODE_ITEM_KEY 1
887 #define BTRFS_INODE_REF_KEY 12
888 #define BTRFS_XATTR_ITEM_KEY 24
889 #define BTRFS_ORPHAN_ITEM_KEY 48
890 /* reserve 2-15 close to the inode for later flexibility */
893 * dir items are the name -> inode pointers in a directory. There is one
894 * for every name in a directory.
896 #define BTRFS_DIR_LOG_ITEM_KEY 60
897 #define BTRFS_DIR_LOG_INDEX_KEY 72
898 #define BTRFS_DIR_ITEM_KEY 84
899 #define BTRFS_DIR_INDEX_KEY 96
901 * extent data is for file data
903 #define BTRFS_EXTENT_DATA_KEY 108
906 * extent csums are stored in a separate tree and hold csums for
907 * an entire extent on disk.
909 #define BTRFS_EXTENT_CSUM_KEY 128
912 * root items point to tree roots. There are typically in the root
913 * tree used by the super block to find all the other trees
915 #define BTRFS_ROOT_ITEM_KEY 132
918 * root backrefs tie subvols and snapshots to the directory entries that
921 #define BTRFS_ROOT_BACKREF_KEY 144
924 * root refs make a fast index for listing all of the snapshots and
925 * subvolumes referenced by a given root. They point directly to the
926 * directory item in the root that references the subvol
928 #define BTRFS_ROOT_REF_KEY 156
931 * extent items are in the extent map tree. These record which blocks
932 * are used, and how many references there are to each block
934 #define BTRFS_EXTENT_ITEM_KEY 168
935 #define BTRFS_EXTENT_REF_KEY 180
938 * block groups give us hints into the extent allocation trees. Which
939 * blocks are free etc etc
941 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
943 #define BTRFS_DEV_EXTENT_KEY 204
944 #define BTRFS_DEV_ITEM_KEY 216
945 #define BTRFS_CHUNK_ITEM_KEY 228
948 * string items are for debugging. They just store a short string of
951 #define BTRFS_STRING_ITEM_KEY 253
953 #define BTRFS_MOUNT_NODATASUM (1 << 0)
954 #define BTRFS_MOUNT_NODATACOW (1 << 1)
955 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
956 #define BTRFS_MOUNT_SSD (1 << 3)
957 #define BTRFS_MOUNT_DEGRADED (1 << 4)
958 #define BTRFS_MOUNT_COMPRESS (1 << 5)
960 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
961 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
962 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
967 #define BTRFS_INODE_NODATASUM (1 << 0)
968 #define BTRFS_INODE_NODATACOW (1 << 1)
969 #define BTRFS_INODE_READONLY (1 << 2)
970 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
971 #define BTRFS_INODE_PREALLOC (1 << 4)
972 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
974 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
976 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
978 /* some macros to generate set/get funcs for the struct fields. This
979 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
982 #define le8_to_cpu(v) (v)
983 #define cpu_to_le8(v) (v)
986 #define read_eb_member(eb, ptr, type, member, result) ( \
987 read_extent_buffer(eb, (char *)(result), \
988 ((unsigned long)(ptr)) + \
989 offsetof(type, member), \
990 sizeof(((type *)0)->member)))
992 #define write_eb_member(eb, ptr, type, member, result) ( \
993 write_extent_buffer(eb, (char *)(result), \
994 ((unsigned long)(ptr)) + \
995 offsetof(type, member), \
996 sizeof(((type *)0)->member)))
998 #ifndef BTRFS_SETGET_FUNCS
999 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1000 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1001 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1004 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1005 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1007 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1008 u##bits res = le##bits##_to_cpu(p->member); \
1009 kunmap_atomic(p, KM_USER0); \
1012 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1015 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1016 p->member = cpu_to_le##bits(val); \
1017 kunmap_atomic(p, KM_USER0); \
1020 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1021 static inline u##bits btrfs_##name(type *s) \
1023 return le##bits##_to_cpu(s->member); \
1025 static inline void btrfs_set_##name(type *s, u##bits val) \
1027 s->member = cpu_to_le##bits(val); \
1030 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1031 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1032 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1033 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1034 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1035 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1037 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1038 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1039 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1040 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1041 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1042 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1044 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1045 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1047 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1049 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1051 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1053 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1055 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1056 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1058 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1060 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1062 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1065 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1067 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1070 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1072 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1075 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1076 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1077 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1078 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1079 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1080 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1081 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1082 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1083 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1084 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1085 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1087 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1089 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1092 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1093 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1094 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1096 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1098 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1100 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1102 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1103 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1105 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1107 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1108 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1110 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1113 unsigned long offset
= (unsigned long)c
;
1114 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1115 offset
+= nr
* sizeof(struct btrfs_stripe
);
1116 return (struct btrfs_stripe
*)offset
;
1119 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1121 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1124 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1125 struct btrfs_chunk
*c
, int nr
)
1127 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1130 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1131 struct btrfs_chunk
*c
, int nr
,
1134 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1137 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1138 struct btrfs_chunk
*c
, int nr
)
1140 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1143 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1144 struct btrfs_chunk
*c
, int nr
,
1147 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1150 /* struct btrfs_block_group_item */
1151 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1153 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1155 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1156 struct btrfs_block_group_item
, chunk_objectid
, 64);
1158 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1159 struct btrfs_block_group_item
, chunk_objectid
, 64);
1160 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1161 struct btrfs_block_group_item
, flags
, 64);
1162 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1163 struct btrfs_block_group_item
, flags
, 64);
1165 /* struct btrfs_inode_ref */
1166 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1167 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1169 /* struct btrfs_inode_item */
1170 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1171 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1172 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1173 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1174 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1175 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1176 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1177 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1178 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1179 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1180 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1181 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1183 static inline struct btrfs_timespec
*
1184 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1186 unsigned long ptr
= (unsigned long)inode_item
;
1187 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1188 return (struct btrfs_timespec
*)ptr
;
1191 static inline struct btrfs_timespec
*
1192 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1194 unsigned long ptr
= (unsigned long)inode_item
;
1195 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1196 return (struct btrfs_timespec
*)ptr
;
1199 static inline struct btrfs_timespec
*
1200 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1202 unsigned long ptr
= (unsigned long)inode_item
;
1203 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1204 return (struct btrfs_timespec
*)ptr
;
1207 static inline struct btrfs_timespec
*
1208 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1210 unsigned long ptr
= (unsigned long)inode_item
;
1211 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1212 return (struct btrfs_timespec
*)ptr
;
1215 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1216 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1218 /* struct btrfs_dev_extent */
1219 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1221 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1222 chunk_objectid
, 64);
1223 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1225 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1227 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1229 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1230 return (u8
*)((unsigned long)dev
+ ptr
);
1233 /* struct btrfs_extent_ref */
1234 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
1235 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
1236 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
1237 BTRFS_SETGET_FUNCS(ref_num_refs
, struct btrfs_extent_ref
, num_refs
, 32);
1239 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
1240 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
1242 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
1244 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs
, struct btrfs_extent_ref
,
1247 /* struct btrfs_extent_item */
1248 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
1249 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
1252 /* struct btrfs_node */
1253 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1254 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1256 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1259 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1260 sizeof(struct btrfs_key_ptr
) * nr
;
1261 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1264 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1268 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1269 sizeof(struct btrfs_key_ptr
) * nr
;
1270 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1273 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1276 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1277 sizeof(struct btrfs_key_ptr
) * nr
;
1278 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1281 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1285 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1286 sizeof(struct btrfs_key_ptr
) * nr
;
1287 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1290 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1292 return offsetof(struct btrfs_node
, ptrs
) +
1293 sizeof(struct btrfs_key_ptr
) * nr
;
1296 void btrfs_node_key(struct extent_buffer
*eb
,
1297 struct btrfs_disk_key
*disk_key
, int nr
);
1299 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1300 struct btrfs_disk_key
*disk_key
, int nr
)
1303 ptr
= btrfs_node_key_ptr_offset(nr
);
1304 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1305 struct btrfs_key_ptr
, key
, disk_key
);
1308 /* struct btrfs_item */
1309 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1310 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1312 static inline unsigned long btrfs_item_nr_offset(int nr
)
1314 return offsetof(struct btrfs_leaf
, items
) +
1315 sizeof(struct btrfs_item
) * nr
;
1318 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1321 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1324 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1325 struct btrfs_item
*item
)
1327 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1330 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1332 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1335 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1337 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1340 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1342 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1345 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1346 struct btrfs_disk_key
*disk_key
, int nr
)
1348 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1349 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1352 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1353 struct btrfs_disk_key
*disk_key
, int nr
)
1355 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1356 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1359 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1362 * struct btrfs_root_ref
1364 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1365 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1366 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1368 /* struct btrfs_dir_item */
1369 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1370 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1371 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1372 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1374 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1375 struct btrfs_dir_item
*item
,
1376 struct btrfs_disk_key
*key
)
1378 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1381 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1382 struct btrfs_dir_item
*item
,
1383 struct btrfs_disk_key
*key
)
1385 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1388 /* struct btrfs_disk_key */
1389 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1391 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1392 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1394 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1395 struct btrfs_disk_key
*disk
)
1397 cpu
->offset
= le64_to_cpu(disk
->offset
);
1398 cpu
->type
= disk
->type
;
1399 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1402 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1403 struct btrfs_key
*cpu
)
1405 disk
->offset
= cpu_to_le64(cpu
->offset
);
1406 disk
->type
= cpu
->type
;
1407 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1410 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1411 struct btrfs_key
*key
, int nr
)
1413 struct btrfs_disk_key disk_key
;
1414 btrfs_node_key(eb
, &disk_key
, nr
);
1415 btrfs_disk_key_to_cpu(key
, &disk_key
);
1418 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1419 struct btrfs_key
*key
, int nr
)
1421 struct btrfs_disk_key disk_key
;
1422 btrfs_item_key(eb
, &disk_key
, nr
);
1423 btrfs_disk_key_to_cpu(key
, &disk_key
);
1426 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1427 struct btrfs_dir_item
*item
,
1428 struct btrfs_key
*key
)
1430 struct btrfs_disk_key disk_key
;
1431 btrfs_dir_item_key(eb
, item
, &disk_key
);
1432 btrfs_disk_key_to_cpu(key
, &disk_key
);
1436 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1441 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1446 /* struct btrfs_header */
1447 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1448 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1450 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1451 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1452 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1453 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1455 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1457 return (btrfs_header_flags(eb
) & flag
) == flag
;
1460 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1462 u64 flags
= btrfs_header_flags(eb
);
1463 btrfs_set_header_flags(eb
, flags
| flag
);
1464 return (flags
& flag
) == flag
;
1467 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1469 u64 flags
= btrfs_header_flags(eb
);
1470 btrfs_set_header_flags(eb
, flags
& ~flag
);
1471 return (flags
& flag
) == flag
;
1474 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1476 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1480 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1482 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1486 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1488 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1492 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1494 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1498 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1503 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1508 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1513 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1515 return (btrfs_header_level(eb
) == 0);
1518 /* struct btrfs_root_item */
1519 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1521 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1522 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1523 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1525 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1527 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1528 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1529 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1530 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1531 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1532 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1533 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1534 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1537 /* struct btrfs_super_block */
1539 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1540 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1541 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1543 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1544 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1545 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1546 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1547 struct btrfs_super_block
, chunk_root_generation
, 64);
1548 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1550 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1552 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1553 chunk_root_level
, 8);
1554 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1556 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1557 log_root_transid
, 64);
1558 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1560 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1562 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1564 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1566 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1568 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1570 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1572 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1573 root_dir_objectid
, 64);
1574 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1576 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1578 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1580 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1581 incompat_flags
, 64);
1582 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1585 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1587 int t
= btrfs_super_csum_type(s
);
1588 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1589 return btrfs_csum_sizes
[t
];
1592 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1594 return offsetof(struct btrfs_leaf
, items
);
1597 /* struct btrfs_file_extent_item */
1598 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1600 static inline unsigned long btrfs_file_extent_inline_start(struct
1601 btrfs_file_extent_item
*e
)
1603 unsigned long offset
= (unsigned long)e
;
1604 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1608 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1610 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1613 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1615 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1617 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1618 disk_num_bytes
, 64);
1619 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1621 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1623 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1625 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1627 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1629 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1630 other_encoding
, 16);
1632 /* this returns the number of file bytes represented by the inline item.
1633 * If an item is compressed, this is the uncompressed size
1635 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1636 struct btrfs_file_extent_item
*e
)
1638 return btrfs_file_extent_ram_bytes(eb
, e
);
1642 * this returns the number of bytes used by the item on disk, minus the
1643 * size of any extent headers. If a file is compressed on disk, this is
1644 * the compressed size
1646 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1647 struct btrfs_item
*e
)
1649 unsigned long offset
;
1650 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1651 return btrfs_item_size(eb
, e
) - offset
;
1654 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1656 return sb
->s_fs_info
;
1659 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1660 const char *name
, int len
)
1662 /* if we already have a name just free it */
1666 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1670 memcpy(root
->name
, name
, len
);
1671 root
->name
[len
] ='\0';
1676 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1678 return root
->leafsize
;
1679 return root
->nodesize
;
1682 /* helper function to cast into the data area of the leaf. */
1683 #define btrfs_item_ptr(leaf, slot, type) \
1684 ((type *)(btrfs_leaf_data(leaf) + \
1685 btrfs_item_offset_nr(leaf, slot)))
1687 #define btrfs_item_ptr_offset(leaf, slot) \
1688 ((unsigned long)(btrfs_leaf_data(leaf) + \
1689 btrfs_item_offset_nr(leaf, slot)))
1691 static inline struct dentry
*fdentry(struct file
*file
)
1693 return file
->f_path
.dentry
;
1697 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1698 int btrfs_lookup_extent_ref(struct btrfs_trans_handle
*trans
,
1699 struct btrfs_root
*root
, u64 bytenr
,
1700 u64 num_bytes
, u32
*refs
);
1701 int btrfs_update_pinned_extents(struct btrfs_root
*root
,
1702 u64 bytenr
, u64 num
, int pin
);
1703 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
1704 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1705 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
1706 struct btrfs_root
*root
, u64 objectid
, u64 bytenr
);
1707 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1708 struct btrfs_root
*root
);
1709 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1710 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1711 btrfs_fs_info
*info
,
1713 u64
btrfs_find_block_group(struct btrfs_root
*root
,
1714 u64 search_start
, u64 search_hint
, int owner
);
1715 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1716 struct btrfs_root
*root
,
1717 u32 blocksize
, u64 parent
,
1723 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
1724 struct btrfs_root
*root
,
1725 u64 bytenr
, u32 blocksize
);
1726 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1727 struct btrfs_root
*root
,
1728 u64 num_bytes
, u64 parent
, u64 min_bytes
,
1729 u64 root_objectid
, u64 ref_generation
,
1730 u64 owner
, u64 empty_size
, u64 hint_byte
,
1731 u64 search_end
, struct btrfs_key
*ins
, u64 data
);
1732 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle
*trans
,
1733 struct btrfs_root
*root
, u64 parent
,
1734 u64 root_objectid
, u64 ref_generation
,
1735 u64 owner
, struct btrfs_key
*ins
);
1736 int btrfs_alloc_logged_extent(struct btrfs_trans_handle
*trans
,
1737 struct btrfs_root
*root
, u64 parent
,
1738 u64 root_objectid
, u64 ref_generation
,
1739 u64 owner
, struct btrfs_key
*ins
);
1740 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
1741 struct btrfs_root
*root
,
1742 u64 num_bytes
, u64 min_alloc_size
,
1743 u64 empty_size
, u64 hint_byte
,
1744 u64 search_end
, struct btrfs_key
*ins
,
1746 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1747 struct extent_buffer
*orig_buf
, struct extent_buffer
*buf
,
1749 int btrfs_cache_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1750 struct extent_buffer
*buf
, u32 nr_extents
);
1751 int btrfs_update_ref(struct btrfs_trans_handle
*trans
,
1752 struct btrfs_root
*root
, struct extent_buffer
*orig_buf
,
1753 struct extent_buffer
*buf
, int start_slot
, int nr
);
1754 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
1755 struct btrfs_root
*root
,
1756 u64 bytenr
, u64 num_bytes
, u64 parent
,
1757 u64 root_objectid
, u64 ref_generation
,
1758 u64 owner_objectid
, int pin
);
1759 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1760 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1761 struct btrfs_root
*root
,
1762 struct extent_io_tree
*unpin
);
1763 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1764 struct btrfs_root
*root
,
1765 u64 bytenr
, u64 num_bytes
, u64 parent
,
1766 u64 root_objectid
, u64 ref_generation
,
1767 u64 owner_objectid
);
1768 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1769 struct btrfs_root
*root
, u64 bytenr
,
1770 u64 orig_parent
, u64 parent
,
1771 u64 root_objectid
, u64 ref_generation
,
1772 u64 owner_objectid
);
1773 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1774 struct btrfs_root
*root
);
1775 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
1776 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1777 int btrfs_read_block_groups(struct btrfs_root
*root
);
1778 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1779 struct btrfs_root
*root
, u64 bytes_used
,
1780 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1782 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
1783 struct btrfs_root
*root
, u64 group_start
);
1784 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
1785 int btrfs_free_reloc_root(struct btrfs_trans_handle
*trans
,
1786 struct btrfs_root
*root
);
1787 int btrfs_drop_dead_reloc_roots(struct btrfs_root
*root
);
1788 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle
*trans
,
1789 struct btrfs_root
*root
,
1790 struct extent_buffer
*buf
, u64 orig_start
);
1791 int btrfs_add_dead_reloc_root(struct btrfs_root
*root
);
1792 int btrfs_cleanup_reloc_trees(struct btrfs_root
*root
);
1793 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
1794 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
1796 int btrfs_previous_item(struct btrfs_root
*root
,
1797 struct btrfs_path
*path
, u64 min_objectid
,
1799 int btrfs_merge_path(struct btrfs_trans_handle
*trans
,
1800 struct btrfs_root
*root
,
1801 struct btrfs_key
*node_keys
,
1802 u64
*nodes
, int lowest_level
);
1803 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1804 struct btrfs_root
*root
, struct btrfs_path
*path
,
1805 struct btrfs_key
*new_key
);
1806 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
1807 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
1808 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
1809 struct btrfs_key
*key
, int lowest_level
,
1810 int cache_only
, u64 min_trans
);
1811 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
1812 struct btrfs_key
*max_key
,
1813 struct btrfs_path
*path
, int cache_only
,
1815 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1816 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1817 struct extent_buffer
*parent
, int parent_slot
,
1818 struct extent_buffer
**cow_ret
, u64 prealloc_dest
);
1819 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1820 struct btrfs_root
*root
,
1821 struct extent_buffer
*buf
,
1822 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1823 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1824 *root
, struct btrfs_path
*path
, u32 data_size
);
1825 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1826 struct btrfs_root
*root
,
1827 struct btrfs_path
*path
,
1828 u32 new_size
, int from_end
);
1829 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
1830 struct btrfs_root
*root
,
1831 struct btrfs_path
*path
,
1832 struct btrfs_key
*new_key
,
1833 unsigned long split_offset
);
1834 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1835 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1837 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1838 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1839 int start_slot
, int cache_only
, u64
*last_ret
,
1840 struct btrfs_key
*progress
);
1841 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1842 struct btrfs_path
*btrfs_alloc_path(void);
1843 void btrfs_free_path(struct btrfs_path
*p
);
1844 void btrfs_init_path(struct btrfs_path
*p
);
1845 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1846 struct btrfs_path
*path
, int slot
, int nr
);
1847 int btrfs_del_leaf(struct btrfs_trans_handle
*trans
,
1848 struct btrfs_root
*root
,
1849 struct btrfs_path
*path
, u64 bytenr
);
1850 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1851 struct btrfs_root
*root
,
1852 struct btrfs_path
*path
)
1854 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1857 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1858 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1859 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
1860 struct btrfs_root
*root
,
1861 struct btrfs_path
*path
,
1862 struct btrfs_key
*cpu_key
, u32
*data_size
,
1864 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1865 struct btrfs_root
*root
,
1866 struct btrfs_path
*path
,
1867 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1869 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1870 struct btrfs_root
*root
,
1871 struct btrfs_path
*path
,
1872 struct btrfs_key
*key
,
1875 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1878 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1879 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1880 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1881 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1883 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
1884 struct btrfs_root
*root
,
1885 struct extent_buffer
*node
,
1886 struct extent_buffer
*parent
);
1888 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
1889 struct btrfs_path
*path
,
1890 u64 root_id
, u64 ref_id
);
1891 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
1892 struct btrfs_root
*tree_root
,
1893 u64 root_id
, u8 type
, u64 ref_id
,
1894 u64 dirid
, u64 sequence
,
1895 const char *name
, int name_len
);
1896 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1897 struct btrfs_key
*key
);
1898 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1899 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1901 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1902 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1904 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1905 btrfs_root_item
*item
, struct btrfs_key
*key
);
1906 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
1907 u64
*found_objectid
);
1908 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1909 struct btrfs_root
*latest_root
);
1911 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1912 *root
, const char *name
, int name_len
, u64 dir
,
1913 struct btrfs_key
*location
, u8 type
, u64 index
);
1914 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1915 struct btrfs_root
*root
,
1916 struct btrfs_path
*path
, u64 dir
,
1917 const char *name
, int name_len
,
1919 struct btrfs_dir_item
*
1920 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1921 struct btrfs_root
*root
,
1922 struct btrfs_path
*path
, u64 dir
,
1923 u64 objectid
, const char *name
, int name_len
,
1925 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1926 struct btrfs_path
*path
,
1927 const char *name
, int name_len
);
1928 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1929 struct btrfs_root
*root
,
1930 struct btrfs_path
*path
,
1931 struct btrfs_dir_item
*di
);
1932 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1933 struct btrfs_root
*root
, const char *name
,
1934 u16 name_len
, const void *data
, u16 data_len
,
1936 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1937 struct btrfs_root
*root
,
1938 struct btrfs_path
*path
, u64 dir
,
1939 const char *name
, u16 name_len
,
1943 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
1944 struct btrfs_root
*root
, u64 offset
);
1945 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
1946 struct btrfs_root
*root
, u64 offset
);
1949 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1950 struct btrfs_root
*fs_root
,
1951 u64 dirid
, u64
*objectid
);
1952 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1955 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1956 struct btrfs_root
*root
,
1957 const char *name
, int name_len
,
1958 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
1959 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1960 struct btrfs_root
*root
,
1961 const char *name
, int name_len
,
1962 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
1963 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1964 struct btrfs_root
*root
,
1965 struct btrfs_path
*path
, u64 objectid
);
1966 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1967 *root
, struct btrfs_path
*path
,
1968 struct btrfs_key
*location
, int mod
);
1971 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
1972 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
1973 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
1974 struct bio
*bio
, u32
*dst
);
1975 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1976 struct btrfs_root
*root
,
1977 u64 objectid
, u64 pos
,
1978 u64 disk_offset
, u64 disk_num_bytes
,
1979 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
1980 u8 compression
, u8 encryption
, u16 other_encoding
);
1981 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1982 struct btrfs_root
*root
,
1983 struct btrfs_path
*path
, u64 objectid
,
1984 u64 bytenr
, int mod
);
1985 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
1986 struct btrfs_root
*root
,
1987 struct btrfs_ordered_sum
*sums
);
1988 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
1989 struct bio
*bio
, u64 file_start
, int contig
);
1990 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
1991 u64 start
, unsigned long len
);
1992 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1993 struct btrfs_root
*root
,
1994 struct btrfs_path
*path
,
1995 u64 bytenr
, int cow
);
1996 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1997 struct btrfs_root
*root
, struct btrfs_path
*path
,
1999 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
2000 u64 end
, struct list_head
*list
);
2003 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2004 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2005 #define ClearPageChecked ClearPageFsMisc
2006 #define SetPageChecked SetPageFsMisc
2007 #define PageChecked PageFsMisc
2010 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2011 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2012 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2013 struct btrfs_root
*root
,
2014 struct inode
*dir
, struct inode
*inode
,
2015 const char *name
, int name_len
);
2016 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2017 struct inode
*parent_inode
, struct inode
*inode
,
2018 const char *name
, int name_len
, int add_backref
, u64 index
);
2019 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2020 struct btrfs_root
*root
,
2021 struct inode
*inode
, u64 new_size
,
2024 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
);
2025 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
);
2026 int btrfs_writepages(struct address_space
*mapping
,
2027 struct writeback_control
*wbc
);
2028 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2029 struct btrfs_root
*new_root
, struct dentry
*dentry
,
2030 u64 new_dirid
, u64 alloc_hint
);
2031 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2032 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2034 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2035 struct file_ra_state
*ra
, struct file
*file
,
2036 pgoff_t offset
, pgoff_t last_index
);
2037 int btrfs_check_free_space(struct btrfs_root
*root
, u64 num_required
,
2039 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
2040 int btrfs_readpage(struct file
*file
, struct page
*page
);
2041 void btrfs_delete_inode(struct inode
*inode
);
2042 void btrfs_put_inode(struct inode
*inode
);
2043 void btrfs_read_locked_inode(struct inode
*inode
);
2044 int btrfs_write_inode(struct inode
*inode
, int wait
);
2045 void btrfs_dirty_inode(struct inode
*inode
);
2046 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2047 void btrfs_destroy_inode(struct inode
*inode
);
2048 int btrfs_init_cachep(void);
2049 void btrfs_destroy_cachep(void);
2050 long btrfs_ioctl_trans_end(struct file
*file
);
2051 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
2052 struct btrfs_root
*root
, int wait
);
2053 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
2054 struct btrfs_root
*root
);
2055 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2056 struct btrfs_root
*root
, int *is_new
);
2057 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2058 unsigned from
, unsigned to
);
2059 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2060 size_t page_offset
, u64 start
, u64 end
,
2062 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2063 struct btrfs_root
*root
,
2064 struct inode
*inode
);
2065 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2066 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2067 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
2068 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
2071 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2074 int btrfs_sync_file(struct file
*file
, struct dentry
*dentry
, int datasync
);
2075 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2077 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2078 extern struct file_operations btrfs_file_operations
;
2079 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
2080 struct btrfs_root
*root
, struct inode
*inode
,
2081 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
2082 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2083 struct btrfs_root
*root
,
2084 struct inode
*inode
, u64 start
, u64 end
);
2085 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2088 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2089 struct btrfs_root
*root
, int cache_only
);
2092 int btrfs_init_sysfs(void);
2093 void btrfs_exit_sysfs(void);
2094 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2095 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2096 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2097 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2100 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2103 u64
btrfs_parse_size(char *str
);
2104 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2105 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2108 int btrfs_check_acl(struct inode
*inode
, int mask
);
2109 int btrfs_init_acl(struct inode
*inode
, struct inode
*dir
);
2110 int btrfs_acl_chmod(struct inode
*inode
);
2112 /* free-space-cache.c */
2113 int btrfs_add_free_space(struct btrfs_block_group_cache
*block_group
,
2114 u64 bytenr
, u64 size
);
2115 int btrfs_add_free_space_lock(struct btrfs_block_group_cache
*block_group
,
2116 u64 offset
, u64 bytes
);
2117 int btrfs_remove_free_space(struct btrfs_block_group_cache
*block_group
,
2118 u64 bytenr
, u64 size
);
2119 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache
*block_group
,
2120 u64 offset
, u64 bytes
);
2121 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
2123 struct btrfs_free_space
*btrfs_find_free_space(struct btrfs_block_group_cache
2124 *block_group
, u64 offset
,
2126 void btrfs_dump_free_space(struct btrfs_block_group_cache
*block_group
,
2128 u64
btrfs_block_group_free_space(struct btrfs_block_group_cache
*block_group
);