5 #include "kerncompat.h"
7 struct btrfs_trans_handle
;
9 #define BTRFS_MAGIC "_BtRfS_M"
11 #define BTRFS_ROOT_TREE_OBJECTID 1
12 #define BTRFS_EXTENT_TREE_OBJECTID 2
13 #define BTRFS_INODE_MAP_OBJECTID 3
14 #define BTRFS_FS_TREE_OBJECTID 4
15 #define BTRFS_FIRST_FREE_OBJECTID 5
17 #define BTRFS_CSUM_SIZE 32
20 * the key defines the order in the tree, and so it also defines (optimal)
21 * block layout. objectid corresonds to the inode number. The flags
22 * tells us things about the object, and is a kind of stream selector.
23 * so for a given inode, keys with flags of 1 might refer to the inode
24 * data, flags of 2 may point to file data in the btree and flags == 3
25 * may point to extents.
27 * offset is the starting byte offset for this key in the stream.
29 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
30 * in cpu native order. Otherwise they are identical and their sizes
31 * should be the same (ie both packed)
33 struct btrfs_disk_key
{
37 } __attribute__ ((__packed__
));
43 } __attribute__ ((__packed__
));
46 * every tree block (leaf or node) starts with this header.
49 u8 csum
[BTRFS_CSUM_SIZE
];
50 u8 fsid
[16]; /* FS specific uuid */
51 __le64 blocknr
; /* which block this node is supposed to live in */
53 __le64 parentid
; /* objectid of the tree root */
58 } __attribute__ ((__packed__
));
60 #define BTRFS_MAX_LEVEL 8
61 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \
62 sizeof(struct btrfs_header)) / \
63 (sizeof(struct btrfs_disk_key) + sizeof(u64)))
64 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
65 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize))
69 * the super block basically lists the main trees of the FS
70 * it currently lacks any block count etc etc
72 struct btrfs_super_block
{
73 u8 csum
[BTRFS_CSUM_SIZE
];
74 /* the first 3 fields must match struct btrfs_header */
75 u8 fsid
[16]; /* FS specific uuid */
76 __le64 blocknr
; /* this block number */
83 __le64 root_dir_objectid
;
84 } __attribute__ ((__packed__
));
87 * A leaf is full of items. offset and size tell us where to find
88 * the item in the leaf (relative to the start of the data area)
91 struct btrfs_disk_key key
;
94 } __attribute__ ((__packed__
));
97 * leaves have an item area and a data area:
98 * [item0, item1....itemN] [free space] [dataN...data1, data0]
100 * The data is separate from the items to get the keys closer together
104 struct btrfs_header header
;
105 struct btrfs_item items
[];
106 } __attribute__ ((__packed__
));
109 * all non-leaf blocks are nodes, they hold only keys and pointers to
112 struct btrfs_key_ptr
{
113 struct btrfs_disk_key key
;
115 } __attribute__ ((__packed__
));
118 struct btrfs_header header
;
119 struct btrfs_key_ptr ptrs
[];
120 } __attribute__ ((__packed__
));
123 * btrfs_paths remember the path taken from the root down to the leaf.
124 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
125 * to any other levels that are present.
127 * The slots array records the index of the item or block pointer
128 * used while walking the tree.
131 struct btrfs_buffer
*nodes
[BTRFS_MAX_LEVEL
];
132 int slots
[BTRFS_MAX_LEVEL
];
136 * items in the extent btree are used to record the objectid of the
137 * owner of the block and the number of references
139 struct btrfs_extent_item
{
142 } __attribute__ ((__packed__
));
144 struct btrfs_inode_timespec
{
147 } __attribute__ ((__packed__
));
150 * there is no padding here on purpose. If you want to extent the inode,
151 * make a new item type
153 struct btrfs_inode_item
{
164 struct btrfs_inode_timespec atime
;
165 struct btrfs_inode_timespec ctime
;
166 struct btrfs_inode_timespec mtime
;
167 struct btrfs_inode_timespec otime
;
168 } __attribute__ ((__packed__
));
170 /* inline data is just a blob of bytes */
171 struct btrfs_inline_data_item
{
173 } __attribute__ ((__packed__
));
175 struct btrfs_dir_item
{
180 } __attribute__ ((__packed__
));
182 struct btrfs_root_item
{
188 } __attribute__ ((__packed__
));
190 struct btrfs_file_extent_item
{
193 * disk space consumed by the extent, checksum blocks are included
197 __le64 disk_num_blocks
;
199 * the logical offset in file blocks (no csums)
200 * this extent record is for. This allows a file extent to point
201 * into the middle of an existing extent on disk, sharing it
202 * between two snapshots (useful if some bytes in the middle of the
203 * extent have changed
207 * the logical number of file blocks (no csums included)
210 } __attribute__ ((__packed__
));
212 struct btrfs_csum_item
{
213 u8 csum
[BTRFS_CSUM_SIZE
];
214 } __attribute__ ((__packed__
));
216 struct btrfs_inode_map_item
{
217 struct btrfs_disk_key key
;
218 } __attribute__ ((__packed__
));
221 struct btrfs_fs_info
{
222 struct btrfs_root
*fs_root
;
223 struct btrfs_root
*extent_root
;
224 struct btrfs_root
*tree_root
;
225 struct btrfs_root
*inode_root
;
226 struct btrfs_key current_insert
;
227 struct btrfs_key last_insert
;
228 struct radix_tree_root cache_radix
;
229 struct radix_tree_root pinned_radix
;
230 struct list_head trans
;
231 struct list_head cache
;
232 u64 last_inode_alloc
;
233 u64 last_inode_alloc_dirid
;
237 struct btrfs_trans_handle
*running_transaction
;
238 struct btrfs_super_block
*disk_super
;
242 * in ram representation of the tree. extent_root is used for all allocations
243 * and for the extent tree extent_root root. current_insert is used
244 * only for the extent tree.
247 struct btrfs_buffer
*node
;
248 struct btrfs_buffer
*commit_root
;
249 struct btrfs_root_item root_item
;
250 struct btrfs_key root_key
;
251 struct btrfs_fs_info
*fs_info
;
257 /* the lower bits in the key flags defines the item type */
258 #define BTRFS_KEY_TYPE_MAX 256
259 #define BTRFS_KEY_TYPE_MASK (BTRFS_KEY_TYPE_MAX - 1)
262 * inode items have the data typically returned from stat and store other
263 * info about object characteristics. There is one for every file and dir in
266 #define BTRFS_INODE_ITEM_KEY 1
269 * dir items are the name -> inode pointers in a directory. There is one
270 * for every name in a directory.
272 #define BTRFS_DIR_ITEM_KEY 2
273 #define BTRFS_DIR_INDEX_KEY 3
275 * inline data is file data that fits in the btree.
277 #define BTRFS_INLINE_DATA_KEY 4
279 * extent data is for data that can't fit in the btree. It points to
280 * a (hopefully) huge chunk of disk
282 #define BTRFS_EXTENT_DATA_KEY 5
283 #define BTRFS_CSUM_ITEM_KEY 6
285 * root items point to tree roots. There are typically in the root
286 * tree used by the super block to find all the other trees
288 #define BTRFS_ROOT_ITEM_KEY 7
290 * extent items are in the extent map tree. These record which blocks
291 * are used, and how many references there are to each block
293 #define BTRFS_EXTENT_ITEM_KEY 8
296 * the inode map records which inode numbers are in use and where
297 * they actually live on disk
299 #define BTRFS_INODE_MAP_ITEM_KEY 9
301 * string items are for debugging. They just store a short string of
304 #define BTRFS_STRING_ITEM_KEY 10
306 static inline u64
btrfs_inode_generation(struct btrfs_inode_item
*i
)
308 return le64_to_cpu(i
->generation
);
311 static inline void btrfs_set_inode_generation(struct btrfs_inode_item
*i
,
314 i
->generation
= cpu_to_le64(val
);
317 static inline u64
btrfs_inode_size(struct btrfs_inode_item
*i
)
319 return le64_to_cpu(i
->size
);
322 static inline void btrfs_set_inode_size(struct btrfs_inode_item
*i
, u64 val
)
324 i
->size
= cpu_to_le64(val
);
327 static inline u64
btrfs_inode_nblocks(struct btrfs_inode_item
*i
)
329 return le64_to_cpu(i
->nblocks
);
332 static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item
*i
, u64 val
)
334 i
->nblocks
= cpu_to_le64(val
);
337 static inline u32
btrfs_inode_nlink(struct btrfs_inode_item
*i
)
339 return le32_to_cpu(i
->nlink
);
342 static inline void btrfs_set_inode_nlink(struct btrfs_inode_item
*i
, u32 val
)
344 i
->nlink
= cpu_to_le32(val
);
347 static inline u32
btrfs_inode_uid(struct btrfs_inode_item
*i
)
349 return le32_to_cpu(i
->uid
);
352 static inline void btrfs_set_inode_uid(struct btrfs_inode_item
*i
, u32 val
)
354 i
->uid
= cpu_to_le32(val
);
357 static inline u32
btrfs_inode_gid(struct btrfs_inode_item
*i
)
359 return le32_to_cpu(i
->gid
);
362 static inline void btrfs_set_inode_gid(struct btrfs_inode_item
*i
, u32 val
)
364 i
->gid
= cpu_to_le32(val
);
367 static inline u32
btrfs_inode_mode(struct btrfs_inode_item
*i
)
369 return le32_to_cpu(i
->mode
);
372 static inline void btrfs_set_inode_mode(struct btrfs_inode_item
*i
, u32 val
)
374 i
->mode
= cpu_to_le32(val
);
377 static inline u32
btrfs_inode_rdev(struct btrfs_inode_item
*i
)
379 return le32_to_cpu(i
->rdev
);
382 static inline void btrfs_set_inode_rdev(struct btrfs_inode_item
*i
, u32 val
)
384 i
->rdev
= cpu_to_le32(val
);
387 static inline u16
btrfs_inode_flags(struct btrfs_inode_item
*i
)
389 return le16_to_cpu(i
->flags
);
392 static inline void btrfs_set_inode_flags(struct btrfs_inode_item
*i
, u16 val
)
394 i
->flags
= cpu_to_le16(val
);
397 static inline u16
btrfs_inode_compat_flags(struct btrfs_inode_item
*i
)
399 return le16_to_cpu(i
->compat_flags
);
402 static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item
*i
,
405 i
->compat_flags
= cpu_to_le16(val
);
409 static inline u64
btrfs_extent_owner(struct btrfs_extent_item
*ei
)
411 return le64_to_cpu(ei
->owner
);
414 static inline void btrfs_set_extent_owner(struct btrfs_extent_item
*ei
, u64 val
)
416 ei
->owner
= cpu_to_le64(val
);
419 static inline u32
btrfs_extent_refs(struct btrfs_extent_item
*ei
)
421 return le32_to_cpu(ei
->refs
);
424 static inline void btrfs_set_extent_refs(struct btrfs_extent_item
*ei
, u32 val
)
426 ei
->refs
= cpu_to_le32(val
);
429 static inline u64
btrfs_node_blockptr(struct btrfs_node
*n
, int nr
)
431 return le64_to_cpu(n
->ptrs
[nr
].blockptr
);
434 static inline void btrfs_set_node_blockptr(struct btrfs_node
*n
, int nr
,
437 n
->ptrs
[nr
].blockptr
= cpu_to_le64(val
);
440 static inline u32
btrfs_item_offset(struct btrfs_item
*item
)
442 return le32_to_cpu(item
->offset
);
445 static inline void btrfs_set_item_offset(struct btrfs_item
*item
, u32 val
)
447 item
->offset
= cpu_to_le32(val
);
450 static inline u32
btrfs_item_end(struct btrfs_item
*item
)
452 return le32_to_cpu(item
->offset
) + le16_to_cpu(item
->size
);
455 static inline u16
btrfs_item_size(struct btrfs_item
*item
)
457 return le16_to_cpu(item
->size
);
460 static inline void btrfs_set_item_size(struct btrfs_item
*item
, u16 val
)
462 item
->size
= cpu_to_le16(val
);
465 static inline u64
btrfs_dir_objectid(struct btrfs_dir_item
*d
)
467 return le64_to_cpu(d
->objectid
);
470 static inline void btrfs_set_dir_objectid(struct btrfs_dir_item
*d
, u64 val
)
472 d
->objectid
= cpu_to_le64(val
);
475 static inline u16
btrfs_dir_flags(struct btrfs_dir_item
*d
)
477 return le16_to_cpu(d
->flags
);
480 static inline void btrfs_set_dir_flags(struct btrfs_dir_item
*d
, u16 val
)
482 d
->flags
= cpu_to_le16(val
);
485 static inline u8
btrfs_dir_type(struct btrfs_dir_item
*d
)
490 static inline void btrfs_set_dir_type(struct btrfs_dir_item
*d
, u8 val
)
495 static inline u16
btrfs_dir_name_len(struct btrfs_dir_item
*d
)
497 return le16_to_cpu(d
->name_len
);
500 static inline void btrfs_set_dir_name_len(struct btrfs_dir_item
*d
, u16 val
)
502 d
->name_len
= cpu_to_le16(val
);
505 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
506 struct btrfs_disk_key
*disk
)
508 cpu
->offset
= le64_to_cpu(disk
->offset
);
509 cpu
->flags
= le32_to_cpu(disk
->flags
);
510 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
513 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
514 struct btrfs_key
*cpu
)
516 disk
->offset
= cpu_to_le64(cpu
->offset
);
517 disk
->flags
= cpu_to_le32(cpu
->flags
);
518 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
521 static inline u64
btrfs_disk_key_objectid(struct btrfs_disk_key
*disk
)
523 return le64_to_cpu(disk
->objectid
);
526 static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key
*disk
,
529 disk
->objectid
= cpu_to_le64(val
);
532 static inline u64
btrfs_disk_key_offset(struct btrfs_disk_key
*disk
)
534 return le64_to_cpu(disk
->offset
);
537 static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key
*disk
,
540 disk
->offset
= cpu_to_le64(val
);
543 static inline u32
btrfs_disk_key_flags(struct btrfs_disk_key
*disk
)
545 return le32_to_cpu(disk
->flags
);
548 static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key
*disk
,
551 disk
->flags
= cpu_to_le32(val
);
554 static inline u32
btrfs_key_type(struct btrfs_key
*key
)
556 return key
->flags
& BTRFS_KEY_TYPE_MASK
;
559 static inline u32
btrfs_disk_key_type(struct btrfs_disk_key
*key
)
561 return le32_to_cpu(key
->flags
) & BTRFS_KEY_TYPE_MASK
;
564 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u32 type
)
566 BUG_ON(type
>= BTRFS_KEY_TYPE_MAX
);
567 key
->flags
= (key
->flags
& ~((u64
)BTRFS_KEY_TYPE_MASK
)) | type
;
570 static inline void btrfs_set_disk_key_type(struct btrfs_disk_key
*key
, u32 type
)
572 u32 flags
= btrfs_disk_key_flags(key
);
573 BUG_ON(type
>= BTRFS_KEY_TYPE_MAX
);
574 flags
= (flags
& ~((u64
)BTRFS_KEY_TYPE_MASK
)) | type
;
575 btrfs_set_disk_key_flags(key
, flags
);
578 static inline u64
btrfs_header_blocknr(struct btrfs_header
*h
)
580 return le64_to_cpu(h
->blocknr
);
583 static inline void btrfs_set_header_blocknr(struct btrfs_header
*h
, u64 blocknr
)
585 h
->blocknr
= cpu_to_le64(blocknr
);
588 static inline u64
btrfs_header_generation(struct btrfs_header
*h
)
590 return le64_to_cpu(h
->generation
);
593 static inline void btrfs_set_header_generation(struct btrfs_header
*h
,
596 h
->generation
= cpu_to_le64(val
);
599 static inline u64
btrfs_header_parentid(struct btrfs_header
*h
)
601 return le64_to_cpu(h
->parentid
);
604 static inline void btrfs_set_header_parentid(struct btrfs_header
*h
,
607 h
->parentid
= cpu_to_le64(parentid
);
610 static inline u16
btrfs_header_nritems(struct btrfs_header
*h
)
612 return le16_to_cpu(h
->nritems
);
615 static inline void btrfs_set_header_nritems(struct btrfs_header
*h
, u16 val
)
617 h
->nritems
= cpu_to_le16(val
);
620 static inline u16
btrfs_header_flags(struct btrfs_header
*h
)
622 return le16_to_cpu(h
->flags
);
625 static inline void btrfs_set_header_flags(struct btrfs_header
*h
, u16 val
)
627 h
->flags
= cpu_to_le16(val
);
630 static inline int btrfs_header_level(struct btrfs_header
*h
)
635 static inline void btrfs_set_header_level(struct btrfs_header
*h
, int level
)
637 BUG_ON(level
> BTRFS_MAX_LEVEL
);
641 static inline int btrfs_is_leaf(struct btrfs_node
*n
)
643 return (btrfs_header_level(&n
->header
) == 0);
646 static inline u64
btrfs_root_blocknr(struct btrfs_root_item
*item
)
648 return le64_to_cpu(item
->blocknr
);
651 static inline void btrfs_set_root_blocknr(struct btrfs_root_item
*item
, u64 val
)
653 item
->blocknr
= cpu_to_le64(val
);
656 static inline u32
btrfs_root_refs(struct btrfs_root_item
*item
)
658 return le32_to_cpu(item
->refs
);
661 static inline void btrfs_set_root_refs(struct btrfs_root_item
*item
, u32 val
)
663 item
->refs
= cpu_to_le32(val
);
666 static inline u64
btrfs_super_blocknr(struct btrfs_super_block
*s
)
668 return le64_to_cpu(s
->blocknr
);
671 static inline void btrfs_set_super_blocknr(struct btrfs_super_block
*s
, u64 val
)
673 s
->blocknr
= cpu_to_le64(val
);
676 static inline u64
btrfs_super_root(struct btrfs_super_block
*s
)
678 return le64_to_cpu(s
->root
);
681 static inline void btrfs_set_super_root(struct btrfs_super_block
*s
, u64 val
)
683 s
->root
= cpu_to_le64(val
);
686 static inline u64
btrfs_super_total_blocks(struct btrfs_super_block
*s
)
688 return le64_to_cpu(s
->total_blocks
);
691 static inline void btrfs_set_super_total_blocks(struct btrfs_super_block
*s
,
694 s
->total_blocks
= cpu_to_le64(val
);
697 static inline u64
btrfs_super_blocks_used(struct btrfs_super_block
*s
)
699 return le64_to_cpu(s
->blocks_used
);
702 static inline void btrfs_set_super_blocks_used(struct btrfs_super_block
*s
,
705 s
->blocks_used
= cpu_to_le64(val
);
708 static inline u32
btrfs_super_blocksize(struct btrfs_super_block
*s
)
710 return le32_to_cpu(s
->blocksize
);
713 static inline void btrfs_set_super_blocksize(struct btrfs_super_block
*s
,
716 s
->blocksize
= cpu_to_le32(val
);
719 static inline u64
btrfs_super_root_dir(struct btrfs_super_block
*s
)
721 return le64_to_cpu(s
->root_dir_objectid
);
724 static inline void btrfs_set_super_root_dir(struct btrfs_super_block
*s
, u64
727 s
->root_dir_objectid
= cpu_to_le64(val
);
730 static inline u8
*btrfs_leaf_data(struct btrfs_leaf
*l
)
732 return (u8
*)l
->items
;
735 static inline u64
btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item
738 return le64_to_cpu(e
->disk_blocknr
);
741 static inline void btrfs_set_file_extent_disk_blocknr(struct
742 btrfs_file_extent_item
745 e
->disk_blocknr
= cpu_to_le64(val
);
748 static inline u64
btrfs_file_extent_generation(struct btrfs_file_extent_item
*e
)
750 return le64_to_cpu(e
->generation
);
753 static inline void btrfs_set_file_extent_generation(struct
754 btrfs_file_extent_item
*e
,
757 e
->generation
= cpu_to_le64(val
);
760 static inline u64
btrfs_file_extent_disk_num_blocks(struct
761 btrfs_file_extent_item
*e
)
763 return le64_to_cpu(e
->disk_num_blocks
);
766 static inline void btrfs_set_file_extent_disk_num_blocks(struct
767 btrfs_file_extent_item
770 e
->disk_num_blocks
= cpu_to_le64(val
);
773 static inline u64
btrfs_file_extent_offset(struct btrfs_file_extent_item
*e
)
775 return le64_to_cpu(e
->offset
);
778 static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item
781 e
->offset
= cpu_to_le64(val
);
784 static inline u64
btrfs_file_extent_num_blocks(struct btrfs_file_extent_item
787 return le64_to_cpu(e
->num_blocks
);
790 static inline void btrfs_set_file_extent_num_blocks(struct
791 btrfs_file_extent_item
*e
,
794 e
->num_blocks
= cpu_to_le64(val
);
797 /* helper function to cast into the data area of the leaf. */
798 #define btrfs_item_ptr(leaf, slot, type) \
799 ((type *)(btrfs_leaf_data(leaf) + \
800 btrfs_item_offset((leaf)->items + (slot))))
802 struct btrfs_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
803 struct btrfs_root
*root
);
804 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
805 struct btrfs_buffer
*buf
);
806 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
807 *root
, u64 blocknr
, u64 num_blocks
, int pin
);
808 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
809 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
811 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
812 void btrfs_init_path(struct btrfs_path
*p
);
813 int btrfs_del_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
814 struct btrfs_path
*path
);
815 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
816 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
817 int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
818 *root
, struct btrfs_path
*path
, struct btrfs_key
819 *cpu_key
, u32 data_size
);
820 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
821 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct btrfs_leaf
*leaf
);
822 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
823 *root
, struct btrfs_buffer
*snap
);
824 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
, struct
826 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
827 struct btrfs_key
*key
);
828 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
829 *root
, struct btrfs_key
*key
, struct btrfs_root_item
831 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
832 *root
, struct btrfs_key
*key
, struct btrfs_root_item
834 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
835 btrfs_root_item
*item
, struct btrfs_key
*key
);
836 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
837 *root
, char *name
, int name_len
, u64 dir
, u64
839 int btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
840 *root
, struct btrfs_path
*path
, u64 dir
, char *name
,
841 int name_len
, int mod
);
842 int btrfs_match_dir_item_name(struct btrfs_root
*root
, struct btrfs_path
*path
,
843 char *name
, int name_len
);
844 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
845 struct btrfs_root
*fs_root
,
846 u64 dirid
, u64
*objectid
);
847 int btrfs_insert_inode_map(struct btrfs_trans_handle
*trans
,
848 struct btrfs_root
*root
,
849 u64 objectid
, struct btrfs_key
*location
);
850 int btrfs_lookup_inode_map(struct btrfs_trans_handle
*trans
,
851 struct btrfs_root
*root
, struct btrfs_path
*path
,
852 u64 objectid
, int mod
);
853 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
854 *root
, u64 objectid
, struct btrfs_inode_item
856 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
857 *root
, struct btrfs_path
*path
, u64 objectid
, int mod
);