5 #include <linux/buffer_head.h>
8 struct btrfs_trans_handle
;
9 struct btrfs_transaction
;
10 extern struct kmem_cache
*btrfs_path_cachep
;
12 #define BTRFS_MAGIC "_BtRfS_M"
14 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
15 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
16 #define BTRFS_INODE_MAP_OBJECTID 3ULL
17 #define BTRFS_FS_TREE_OBJECTID 4ULL
18 #define BTRFS_FIRST_FREE_OBJECTID 5ULL
21 * we can actually store much bigger names, but lets not confuse the rest
24 #define BTRFS_NAME_LEN 255
26 /* 32 bytes in various csum fields */
27 #define BTRFS_CSUM_SIZE 32
30 * the key defines the order in the tree, and so it also defines (optimal)
31 * block layout. objectid corresonds to the inode number. The flags
32 * tells us things about the object, and is a kind of stream selector.
33 * so for a given inode, keys with flags of 1 might refer to the inode
34 * data, flags of 2 may point to file data in the btree and flags == 3
35 * may point to extents.
37 * offset is the starting byte offset for this key in the stream.
39 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
40 * in cpu native order. Otherwise they are identical and their sizes
41 * should be the same (ie both packed)
43 struct btrfs_disk_key
{
47 } __attribute__ ((__packed__
));
53 } __attribute__ ((__packed__
));
56 * every tree block (leaf or node) starts with this header.
59 u8 csum
[BTRFS_CSUM_SIZE
];
60 u8 fsid
[16]; /* FS specific uuid */
61 __le64 blocknr
; /* which block this node is supposed to live in */
63 __le64 parentid
; /* objectid of the tree root */
68 } __attribute__ ((__packed__
));
70 #define BTRFS_MAX_LEVEL 8
71 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \
72 sizeof(struct btrfs_header)) / \
73 (sizeof(struct btrfs_disk_key) + sizeof(u64)))
74 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
75 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize))
79 * the super block basically lists the main trees of the FS
80 * it currently lacks any block count etc etc
82 struct btrfs_super_block
{
83 u8 csum
[BTRFS_CSUM_SIZE
];
84 /* the first 3 fields must match struct btrfs_header */
85 u8 fsid
[16]; /* FS specific uuid */
86 __le64 blocknr
; /* this block number */
93 __le64 root_dir_objectid
;
94 } __attribute__ ((__packed__
));
97 * A leaf is full of items. offset and size tell us where to find
98 * the item in the leaf (relative to the start of the data area)
101 struct btrfs_disk_key key
;
104 } __attribute__ ((__packed__
));
107 * leaves have an item area and a data area:
108 * [item0, item1....itemN] [free space] [dataN...data1, data0]
110 * The data is separate from the items to get the keys closer together
114 struct btrfs_header header
;
115 struct btrfs_item items
[];
116 } __attribute__ ((__packed__
));
119 * all non-leaf blocks are nodes, they hold only keys and pointers to
122 struct btrfs_key_ptr
{
123 struct btrfs_disk_key key
;
125 } __attribute__ ((__packed__
));
128 struct btrfs_header header
;
129 struct btrfs_key_ptr ptrs
[];
130 } __attribute__ ((__packed__
));
133 * btrfs_paths remember the path taken from the root down to the leaf.
134 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
135 * to any other levels that are present.
137 * The slots array records the index of the item or block pointer
138 * used while walking the tree.
141 struct buffer_head
*nodes
[BTRFS_MAX_LEVEL
];
142 int slots
[BTRFS_MAX_LEVEL
];
146 * items in the extent btree are used to record the objectid of the
147 * owner of the block and the number of references
149 struct btrfs_extent_item
{
152 } __attribute__ ((__packed__
));
154 struct btrfs_inode_timespec
{
157 } __attribute__ ((__packed__
));
160 * there is no padding here on purpose. If you want to extent the inode,
161 * make a new item type
163 struct btrfs_inode_item
{
174 struct btrfs_inode_timespec atime
;
175 struct btrfs_inode_timespec ctime
;
176 struct btrfs_inode_timespec mtime
;
177 struct btrfs_inode_timespec otime
;
178 } __attribute__ ((__packed__
));
180 /* inline data is just a blob of bytes */
181 struct btrfs_inline_data_item
{
183 } __attribute__ ((__packed__
));
185 struct btrfs_dir_item
{
190 } __attribute__ ((__packed__
));
192 struct btrfs_root_item
{
198 } __attribute__ ((__packed__
));
200 struct btrfs_file_extent_item
{
203 * disk space consumed by the extent, checksum blocks are included
207 __le64 disk_num_blocks
;
209 * the logical offset in file blocks (no csums)
210 * this extent record is for. This allows a file extent to point
211 * into the middle of an existing extent on disk, sharing it
212 * between two snapshots (useful if some bytes in the middle of the
213 * extent have changed
217 * the logical number of file blocks (no csums included)
220 } __attribute__ ((__packed__
));
222 struct btrfs_csum_item
{
223 u8 csum
[BTRFS_CSUM_SIZE
];
224 } __attribute__ ((__packed__
));
226 struct btrfs_inode_map_item
{
227 struct btrfs_disk_key key
;
228 } __attribute__ ((__packed__
));
231 struct btrfs_fs_info
{
232 struct btrfs_root
*fs_root
;
233 struct btrfs_root
*extent_root
;
234 struct btrfs_root
*tree_root
;
235 struct btrfs_root
*inode_root
;
236 struct btrfs_key current_insert
;
237 struct btrfs_key last_insert
;
238 struct radix_tree_root pending_del_radix
;
239 struct radix_tree_root pinned_radix
;
240 u64 last_inode_alloc
;
242 struct btrfs_transaction
*running_transaction
;
243 struct btrfs_super_block
*disk_super
;
244 struct buffer_head
*sb_buffer
;
245 struct super_block
*sb
;
246 struct inode
*btree_inode
;
247 struct mutex trans_mutex
;
248 struct mutex fs_mutex
;
249 struct crypto_hash
*hash_tfm
;
250 spinlock_t hash_lock
;
254 * in ram representation of the tree. extent_root is used for all allocations
255 * and for the extent tree extent_root root. current_insert is used
256 * only for the extent tree.
259 struct buffer_head
*node
;
260 struct buffer_head
*commit_root
;
261 struct btrfs_root_item root_item
;
262 struct btrfs_key root_key
;
263 struct btrfs_fs_info
*fs_info
;
269 /* the lower bits in the key flags defines the item type */
270 #define BTRFS_KEY_TYPE_MAX 256
271 #define BTRFS_KEY_TYPE_MASK (BTRFS_KEY_TYPE_MAX - 1)
274 * inode items have the data typically returned from stat and store other
275 * info about object characteristics. There is one for every file and dir in
278 #define BTRFS_INODE_ITEM_KEY 1
281 * dir items are the name -> inode pointers in a directory. There is one
282 * for every name in a directory.
284 #define BTRFS_DIR_ITEM_KEY 2
286 * inline data is file data that fits in the btree.
288 #define BTRFS_INLINE_DATA_KEY 3
290 * extent data is for data that can't fit in the btree. It points to
291 * a (hopefully) huge chunk of disk
293 #define BTRFS_EXTENT_DATA_KEY 4
295 * csum items have the checksums for data in the extents
297 #define BTRFS_CSUM_ITEM_KEY 5
300 * root items point to tree roots. There are typically in the root
301 * tree used by the super block to find all the other trees
303 #define BTRFS_ROOT_ITEM_KEY 6
305 * extent items are in the extent map tree. These record which blocks
306 * are used, and how many references there are to each block
308 #define BTRFS_EXTENT_ITEM_KEY 7
311 * the inode map records which inode numbers are in use and where
312 * they actually live on disk
314 #define BTRFS_INODE_MAP_ITEM_KEY 8
316 * string items are for debugging. They just store a short string of
319 #define BTRFS_STRING_ITEM_KEY 9
321 static inline u64
btrfs_inode_generation(struct btrfs_inode_item
*i
)
323 return le64_to_cpu(i
->generation
);
326 static inline void btrfs_set_inode_generation(struct btrfs_inode_item
*i
,
329 i
->generation
= cpu_to_le64(val
);
332 static inline u64
btrfs_inode_size(struct btrfs_inode_item
*i
)
334 return le64_to_cpu(i
->size
);
337 static inline void btrfs_set_inode_size(struct btrfs_inode_item
*i
, u64 val
)
339 i
->size
= cpu_to_le64(val
);
342 static inline u64
btrfs_inode_nblocks(struct btrfs_inode_item
*i
)
344 return le64_to_cpu(i
->nblocks
);
347 static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item
*i
, u64 val
)
349 i
->nblocks
= cpu_to_le64(val
);
352 static inline u32
btrfs_inode_nlink(struct btrfs_inode_item
*i
)
354 return le32_to_cpu(i
->nlink
);
357 static inline void btrfs_set_inode_nlink(struct btrfs_inode_item
*i
, u32 val
)
359 i
->nlink
= cpu_to_le32(val
);
362 static inline u32
btrfs_inode_uid(struct btrfs_inode_item
*i
)
364 return le32_to_cpu(i
->uid
);
367 static inline void btrfs_set_inode_uid(struct btrfs_inode_item
*i
, u32 val
)
369 i
->uid
= cpu_to_le32(val
);
372 static inline u32
btrfs_inode_gid(struct btrfs_inode_item
*i
)
374 return le32_to_cpu(i
->gid
);
377 static inline void btrfs_set_inode_gid(struct btrfs_inode_item
*i
, u32 val
)
379 i
->gid
= cpu_to_le32(val
);
382 static inline u32
btrfs_inode_mode(struct btrfs_inode_item
*i
)
384 return le32_to_cpu(i
->mode
);
387 static inline void btrfs_set_inode_mode(struct btrfs_inode_item
*i
, u32 val
)
389 i
->mode
= cpu_to_le32(val
);
392 static inline u32
btrfs_inode_rdev(struct btrfs_inode_item
*i
)
394 return le32_to_cpu(i
->rdev
);
397 static inline void btrfs_set_inode_rdev(struct btrfs_inode_item
*i
, u32 val
)
399 i
->rdev
= cpu_to_le32(val
);
402 static inline u16
btrfs_inode_flags(struct btrfs_inode_item
*i
)
404 return le16_to_cpu(i
->flags
);
407 static inline void btrfs_set_inode_flags(struct btrfs_inode_item
*i
, u16 val
)
409 i
->flags
= cpu_to_le16(val
);
412 static inline u16
btrfs_inode_compat_flags(struct btrfs_inode_item
*i
)
414 return le16_to_cpu(i
->compat_flags
);
417 static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item
*i
,
420 i
->compat_flags
= cpu_to_le16(val
);
423 static inline u64
btrfs_timespec_sec(struct btrfs_inode_timespec
*ts
)
425 return le64_to_cpu(ts
->sec
);
428 static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec
*ts
,
431 ts
->sec
= cpu_to_le64(val
);
434 static inline u32
btrfs_timespec_nsec(struct btrfs_inode_timespec
*ts
)
436 return le32_to_cpu(ts
->nsec
);
439 static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec
*ts
,
442 ts
->nsec
= cpu_to_le32(val
);
445 static inline u64
btrfs_extent_owner(struct btrfs_extent_item
*ei
)
447 return le64_to_cpu(ei
->owner
);
450 static inline void btrfs_set_extent_owner(struct btrfs_extent_item
*ei
, u64 val
)
452 ei
->owner
= cpu_to_le64(val
);
455 static inline u32
btrfs_extent_refs(struct btrfs_extent_item
*ei
)
457 return le32_to_cpu(ei
->refs
);
460 static inline void btrfs_set_extent_refs(struct btrfs_extent_item
*ei
, u32 val
)
462 ei
->refs
= cpu_to_le32(val
);
465 static inline u64
btrfs_node_blockptr(struct btrfs_node
*n
, int nr
)
467 return le64_to_cpu(n
->ptrs
[nr
].blockptr
);
470 static inline void btrfs_set_node_blockptr(struct btrfs_node
*n
, int nr
,
473 n
->ptrs
[nr
].blockptr
= cpu_to_le64(val
);
476 static inline u32
btrfs_item_offset(struct btrfs_item
*item
)
478 return le32_to_cpu(item
->offset
);
481 static inline void btrfs_set_item_offset(struct btrfs_item
*item
, u32 val
)
483 item
->offset
= cpu_to_le32(val
);
486 static inline u32
btrfs_item_end(struct btrfs_item
*item
)
488 return le32_to_cpu(item
->offset
) + le16_to_cpu(item
->size
);
491 static inline u16
btrfs_item_size(struct btrfs_item
*item
)
493 return le16_to_cpu(item
->size
);
496 static inline void btrfs_set_item_size(struct btrfs_item
*item
, u16 val
)
498 item
->size
= cpu_to_le16(val
);
501 static inline u64
btrfs_dir_objectid(struct btrfs_dir_item
*d
)
503 return le64_to_cpu(d
->objectid
);
506 static inline void btrfs_set_dir_objectid(struct btrfs_dir_item
*d
, u64 val
)
508 d
->objectid
= cpu_to_le64(val
);
511 static inline u16
btrfs_dir_flags(struct btrfs_dir_item
*d
)
513 return le16_to_cpu(d
->flags
);
516 static inline void btrfs_set_dir_flags(struct btrfs_dir_item
*d
, u16 val
)
518 d
->flags
= cpu_to_le16(val
);
521 static inline u8
btrfs_dir_type(struct btrfs_dir_item
*d
)
526 static inline void btrfs_set_dir_type(struct btrfs_dir_item
*d
, u8 val
)
531 static inline u16
btrfs_dir_name_len(struct btrfs_dir_item
*d
)
533 return le16_to_cpu(d
->name_len
);
536 static inline void btrfs_set_dir_name_len(struct btrfs_dir_item
*d
, u16 val
)
538 d
->name_len
= cpu_to_le16(val
);
541 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
542 struct btrfs_disk_key
*disk
)
544 cpu
->offset
= le64_to_cpu(disk
->offset
);
545 cpu
->flags
= le32_to_cpu(disk
->flags
);
546 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
549 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
550 struct btrfs_key
*cpu
)
552 disk
->offset
= cpu_to_le64(cpu
->offset
);
553 disk
->flags
= cpu_to_le32(cpu
->flags
);
554 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
557 static inline u64
btrfs_disk_key_objectid(struct btrfs_disk_key
*disk
)
559 return le64_to_cpu(disk
->objectid
);
562 static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key
*disk
,
565 disk
->objectid
= cpu_to_le64(val
);
568 static inline u64
btrfs_disk_key_offset(struct btrfs_disk_key
*disk
)
570 return le64_to_cpu(disk
->offset
);
573 static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key
*disk
,
576 disk
->offset
= cpu_to_le64(val
);
579 static inline u32
btrfs_disk_key_flags(struct btrfs_disk_key
*disk
)
581 return le32_to_cpu(disk
->flags
);
584 static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key
*disk
,
587 disk
->flags
= cpu_to_le32(val
);
590 static inline u32
btrfs_key_type(struct btrfs_key
*key
)
592 return key
->flags
& BTRFS_KEY_TYPE_MASK
;
595 static inline u32
btrfs_disk_key_type(struct btrfs_disk_key
*key
)
597 return le32_to_cpu(key
->flags
) & BTRFS_KEY_TYPE_MASK
;
600 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u32 type
)
602 BUG_ON(type
>= BTRFS_KEY_TYPE_MAX
);
603 key
->flags
= (key
->flags
& ~((u64
)BTRFS_KEY_TYPE_MASK
)) | type
;
606 static inline void btrfs_set_disk_key_type(struct btrfs_disk_key
*key
, u32 type
)
608 u32 flags
= btrfs_disk_key_flags(key
);
609 BUG_ON(type
>= BTRFS_KEY_TYPE_MAX
);
610 flags
= (flags
& ~((u64
)BTRFS_KEY_TYPE_MASK
)) | type
;
611 btrfs_set_disk_key_flags(key
, flags
);
614 static inline u64
btrfs_header_blocknr(struct btrfs_header
*h
)
616 return le64_to_cpu(h
->blocknr
);
619 static inline void btrfs_set_header_blocknr(struct btrfs_header
*h
, u64 blocknr
)
621 h
->blocknr
= cpu_to_le64(blocknr
);
624 static inline u64
btrfs_header_generation(struct btrfs_header
*h
)
626 return le64_to_cpu(h
->generation
);
629 static inline void btrfs_set_header_generation(struct btrfs_header
*h
,
632 h
->generation
= cpu_to_le64(val
);
635 static inline u64
btrfs_header_parentid(struct btrfs_header
*h
)
637 return le64_to_cpu(h
->parentid
);
640 static inline void btrfs_set_header_parentid(struct btrfs_header
*h
,
643 h
->parentid
= cpu_to_le64(parentid
);
646 static inline u16
btrfs_header_nritems(struct btrfs_header
*h
)
648 return le16_to_cpu(h
->nritems
);
651 static inline void btrfs_set_header_nritems(struct btrfs_header
*h
, u16 val
)
653 h
->nritems
= cpu_to_le16(val
);
656 static inline u16
btrfs_header_flags(struct btrfs_header
*h
)
658 return le16_to_cpu(h
->flags
);
661 static inline void btrfs_set_header_flags(struct btrfs_header
*h
, u16 val
)
663 h
->flags
= cpu_to_le16(val
);
666 static inline int btrfs_header_level(struct btrfs_header
*h
)
671 static inline void btrfs_set_header_level(struct btrfs_header
*h
, int level
)
673 BUG_ON(level
> BTRFS_MAX_LEVEL
);
677 static inline int btrfs_is_leaf(struct btrfs_node
*n
)
679 return (btrfs_header_level(&n
->header
) == 0);
682 static inline u64
btrfs_root_blocknr(struct btrfs_root_item
*item
)
684 return le64_to_cpu(item
->blocknr
);
687 static inline void btrfs_set_root_blocknr(struct btrfs_root_item
*item
, u64 val
)
689 item
->blocknr
= cpu_to_le64(val
);
692 static inline u32
btrfs_root_refs(struct btrfs_root_item
*item
)
694 return le32_to_cpu(item
->refs
);
697 static inline void btrfs_set_root_refs(struct btrfs_root_item
*item
, u32 val
)
699 item
->refs
= cpu_to_le32(val
);
702 static inline u64
btrfs_super_blocknr(struct btrfs_super_block
*s
)
704 return le64_to_cpu(s
->blocknr
);
707 static inline void btrfs_set_super_blocknr(struct btrfs_super_block
*s
, u64 val
)
709 s
->blocknr
= cpu_to_le64(val
);
712 static inline u64
btrfs_super_root(struct btrfs_super_block
*s
)
714 return le64_to_cpu(s
->root
);
717 static inline void btrfs_set_super_root(struct btrfs_super_block
*s
, u64 val
)
719 s
->root
= cpu_to_le64(val
);
722 static inline u64
btrfs_super_total_blocks(struct btrfs_super_block
*s
)
724 return le64_to_cpu(s
->total_blocks
);
727 static inline void btrfs_set_super_total_blocks(struct btrfs_super_block
*s
,
730 s
->total_blocks
= cpu_to_le64(val
);
733 static inline u64
btrfs_super_blocks_used(struct btrfs_super_block
*s
)
735 return le64_to_cpu(s
->blocks_used
);
738 static inline void btrfs_set_super_blocks_used(struct btrfs_super_block
*s
,
741 s
->blocks_used
= cpu_to_le64(val
);
744 static inline u32
btrfs_super_blocksize(struct btrfs_super_block
*s
)
746 return le32_to_cpu(s
->blocksize
);
749 static inline void btrfs_set_super_blocksize(struct btrfs_super_block
*s
,
752 s
->blocksize
= cpu_to_le32(val
);
755 static inline u64
btrfs_super_root_dir(struct btrfs_super_block
*s
)
757 return le64_to_cpu(s
->root_dir_objectid
);
760 static inline void btrfs_set_super_root_dir(struct btrfs_super_block
*s
, u64
763 s
->root_dir_objectid
= cpu_to_le64(val
);
766 static inline u8
*btrfs_leaf_data(struct btrfs_leaf
*l
)
768 return (u8
*)l
->items
;
771 static inline u64
btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item
774 return le64_to_cpu(e
->disk_blocknr
);
777 static inline void btrfs_set_file_extent_disk_blocknr(struct
778 btrfs_file_extent_item
781 e
->disk_blocknr
= cpu_to_le64(val
);
784 static inline u64
btrfs_file_extent_generation(struct btrfs_file_extent_item
*e
)
786 return le64_to_cpu(e
->generation
);
789 static inline void btrfs_set_file_extent_generation(struct
790 btrfs_file_extent_item
*e
,
793 e
->generation
= cpu_to_le64(val
);
796 static inline u64
btrfs_file_extent_disk_num_blocks(struct
797 btrfs_file_extent_item
*e
)
799 return le64_to_cpu(e
->disk_num_blocks
);
802 static inline void btrfs_set_file_extent_disk_num_blocks(struct
803 btrfs_file_extent_item
806 e
->disk_num_blocks
= cpu_to_le64(val
);
809 static inline u64
btrfs_file_extent_offset(struct btrfs_file_extent_item
*e
)
811 return le64_to_cpu(e
->offset
);
814 static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item
817 e
->offset
= cpu_to_le64(val
);
820 static inline u64
btrfs_file_extent_num_blocks(struct btrfs_file_extent_item
823 return le64_to_cpu(e
->num_blocks
);
826 static inline void btrfs_set_file_extent_num_blocks(struct
827 btrfs_file_extent_item
*e
,
830 e
->num_blocks
= cpu_to_le64(val
);
833 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
835 return sb
->s_fs_info
;
838 static inline void btrfs_check_bounds(void *vptr
, size_t len
,
839 void *vcontainer
, size_t container_len
)
842 char *container
= vcontainer
;
843 WARN_ON(ptr
< container
);
844 WARN_ON(ptr
+ len
> container
+ container_len
);
847 static inline void btrfs_memcpy(struct btrfs_root
*root
,
849 void *dst
, const void *src
, size_t nr
)
851 btrfs_check_bounds(dst
, nr
, dst_block
, root
->fs_info
->sb
->s_blocksize
);
852 memcpy(dst
, src
, nr
);
855 static inline void btrfs_memmove(struct btrfs_root
*root
,
857 void *dst
, void *src
, size_t nr
)
859 btrfs_check_bounds(dst
, nr
, dst_block
, root
->fs_info
->sb
->s_blocksize
);
860 memmove(dst
, src
, nr
);
863 static inline void btrfs_mark_buffer_dirty(struct buffer_head
*bh
)
865 WARN_ON(!atomic_read(&bh
->b_count
));
866 mark_buffer_dirty(bh
);
869 /* helper function to cast into the data area of the leaf. */
870 #define btrfs_item_ptr(leaf, slot, type) \
871 ((type *)(btrfs_leaf_data(leaf) + \
872 btrfs_item_offset((leaf)->items + (slot))))
875 struct buffer_head
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
876 struct btrfs_root
*root
);
877 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
878 *root
, u64 num_blocks
, u64 search_start
, u64
879 search_end
, u64 owner
, struct btrfs_key
*ins
);
880 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
881 struct buffer_head
*buf
);
882 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
883 *root
, u64 blocknr
, u64 num_blocks
, int pin
);
884 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
, struct
887 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
888 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
890 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
891 struct btrfs_path
*btrfs_alloc_path(void);
892 void btrfs_free_path(struct btrfs_path
*p
);
893 void btrfs_init_path(struct btrfs_path
*p
);
894 int btrfs_del_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
895 struct btrfs_path
*path
);
896 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
897 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
898 int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
899 *root
, struct btrfs_path
*path
, struct btrfs_key
900 *cpu_key
, u32 data_size
);
901 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
902 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct btrfs_leaf
*leaf
);
903 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
904 *root
, struct buffer_head
*snap
);
906 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
907 struct btrfs_key
*key
);
908 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
909 *root
, struct btrfs_key
*key
, struct btrfs_root_item
911 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
912 *root
, struct btrfs_key
*key
, struct btrfs_root_item
914 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
915 btrfs_root_item
*item
, struct btrfs_key
*key
);
917 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
918 *root
, const char *name
, int name_len
, u64 dir
, u64
920 int btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
921 *root
, struct btrfs_path
*path
, u64 dir
,
922 const char *name
, int name_len
, int mod
);
923 int btrfs_match_dir_item_name(struct btrfs_root
*root
, struct btrfs_path
*path
,
924 const char *name
, int name_len
);
926 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
927 struct btrfs_root
*fs_root
,
928 u64 dirid
, u64
*objectid
);
929 int btrfs_insert_inode_map(struct btrfs_trans_handle
*trans
,
930 struct btrfs_root
*root
,
931 u64 objectid
, struct btrfs_key
*location
);
932 int btrfs_lookup_inode_map(struct btrfs_trans_handle
*trans
,
933 struct btrfs_root
*root
, struct btrfs_path
*path
,
934 u64 objectid
, int mod
);
936 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
937 *root
, u64 objectid
, struct btrfs_inode_item
939 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
940 *root
, struct btrfs_path
*path
, u64 objectid
, int mod
);
943 int btrfs_alloc_file_extent(struct btrfs_trans_handle
*trans
,
944 struct btrfs_root
*root
,
945 u64 objectid
, u64 offset
,
946 u64 num_blocks
, u64 hint_block
,
948 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
949 struct btrfs_root
*root
,
950 struct btrfs_path
*path
, u64 objectid
,
951 u64 blocknr
, int mod
);
952 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
953 struct btrfs_root
*root
,
954 u64 objectid
, u64 offset
,
955 char *data
, size_t len
);
956 int btrfs_csum_verify_file_block(struct btrfs_root
*root
,
957 u64 objectid
, u64 offset
,
958 char *data
, size_t len
);