4 #include <linux/radix-tree.h>
7 struct btrfs_trans_handle
;
8 struct btrfs_transaction
;
10 #define BTRFS_MAGIC "_BtRfS_M"
12 #define BTRFS_ROOT_TREE_OBJECTID 1
13 #define BTRFS_EXTENT_TREE_OBJECTID 2
14 #define BTRFS_INODE_MAP_OBJECTID 3
15 #define BTRFS_FS_TREE_OBJECTID 4
18 * we can actually store much bigger names, but lets not confuse the rest
21 #define BTRFS_NAME_LEN 255
24 * the key defines the order in the tree, and so it also defines (optimal)
25 * block layout. objectid corresonds to the inode number. The flags
26 * tells us things about the object, and is a kind of stream selector.
27 * so for a given inode, keys with flags of 1 might refer to the inode
28 * data, flags of 2 may point to file data in the btree and flags == 3
29 * may point to extents.
31 * offset is the starting byte offset for this key in the stream.
33 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
34 * in cpu native order. Otherwise they are identical and their sizes
35 * should be the same (ie both packed)
37 struct btrfs_disk_key
{
41 } __attribute__ ((__packed__
));
47 } __attribute__ ((__packed__
));
50 * every tree block (leaf or node) starts with this header.
53 u8 fsid
[16]; /* FS specific uuid */
54 __le64 blocknr
; /* which block this node is supposed to live in */
56 __le64 parentid
; /* objectid of the tree root */
61 /* generation flags to be added */
62 } __attribute__ ((__packed__
));
64 #define BTRFS_MAX_LEVEL 8
65 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \
66 sizeof(struct btrfs_header)) / \
67 (sizeof(struct btrfs_disk_key) + sizeof(u64)))
68 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
69 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize))
73 * the super block basically lists the main trees of the FS
74 * it currently lacks any block count etc etc
76 struct btrfs_super_block
{
77 u8 fsid
[16]; /* FS specific uuid */
78 __le64 blocknr
; /* this block number */
86 __le64 root_dir_objectid
;
87 } __attribute__ ((__packed__
));
90 * A leaf is full of items. offset and size tell us where to find
91 * the item in the leaf (relative to the start of the data area)
94 struct btrfs_disk_key key
;
97 } __attribute__ ((__packed__
));
100 * leaves have an item area and a data area:
101 * [item0, item1....itemN] [free space] [dataN...data1, data0]
103 * The data is separate from the items to get the keys closer together
107 struct btrfs_header header
;
108 struct btrfs_item items
[];
109 } __attribute__ ((__packed__
));
112 * all non-leaf blocks are nodes, they hold only keys and pointers to
115 struct btrfs_key_ptr
{
116 struct btrfs_disk_key key
;
118 } __attribute__ ((__packed__
));
121 struct btrfs_header header
;
122 struct btrfs_key_ptr ptrs
[];
123 } __attribute__ ((__packed__
));
126 * btrfs_paths remember the path taken from the root down to the leaf.
127 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
128 * to any other levels that are present.
130 * The slots array records the index of the item or block pointer
131 * used while walking the tree.
134 struct buffer_head
*nodes
[BTRFS_MAX_LEVEL
];
135 int slots
[BTRFS_MAX_LEVEL
];
139 * items in the extent btree are used to record the objectid of the
140 * owner of the block and the number of references
142 struct btrfs_extent_item
{
145 } __attribute__ ((__packed__
));
147 struct btrfs_inode_timespec
{
150 } __attribute__ ((__packed__
));
153 * there is no padding here on purpose. If you want to extent the inode,
154 * make a new item type
156 struct btrfs_inode_item
{
167 struct btrfs_inode_timespec atime
;
168 struct btrfs_inode_timespec ctime
;
169 struct btrfs_inode_timespec mtime
;
170 struct btrfs_inode_timespec otime
;
171 } __attribute__ ((__packed__
));
173 /* inline data is just a blob of bytes */
174 struct btrfs_inline_data_item
{
176 } __attribute__ ((__packed__
));
178 struct btrfs_dir_item
{
183 } __attribute__ ((__packed__
));
185 struct btrfs_root_item
{
191 } __attribute__ ((__packed__
));
193 struct btrfs_file_extent_item
{
195 * disk space consumed by the extent, checksum blocks are included
199 __le64 disk_num_blocks
;
201 * the logical offset in file bytes (no csums)
202 * this extent record is for. This allows a file extent to point
203 * into the middle of an existing extent on disk, sharing it
204 * between two snapshots (useful if some bytes in the middle of the
205 * extent have changed
209 * the logical number of file blocks (no csums included)
212 } __attribute__ ((__packed__
));
214 struct btrfs_inode_map_item
{
215 struct btrfs_disk_key key
;
216 } __attribute__ ((__packed__
));
218 struct btrfs_fs_info
{
219 struct btrfs_root
*fs_root
;
220 struct btrfs_root
*extent_root
;
221 struct btrfs_root
*tree_root
;
222 struct btrfs_root
*inode_root
;
223 struct btrfs_key current_insert
;
224 struct btrfs_key last_insert
;
225 struct radix_tree_root pinned_radix
;
226 u64 last_inode_alloc
;
227 u64 last_inode_alloc_dirid
;
229 struct btrfs_transaction
*running_transaction
;
230 struct btrfs_super_block
*disk_super
;
231 struct buffer_head
*sb_buffer
;
232 struct super_block
*sb
;
233 struct mutex trans_mutex
;
237 * in ram representation of the tree. extent_root is used for all allocations
238 * and for the extent tree extent_root root. current_insert is used
239 * only for the extent tree.
242 struct buffer_head
*node
;
243 struct buffer_head
*commit_root
;
244 struct btrfs_root_item root_item
;
245 struct btrfs_key root_key
;
246 struct btrfs_fs_info
*fs_info
;
252 /* the lower bits in the key flags defines the item type */
253 #define BTRFS_KEY_TYPE_MAX 256
254 #define BTRFS_KEY_TYPE_MASK (BTRFS_KEY_TYPE_MAX - 1)
257 * inode items have the data typically returned from stat and store other
258 * info about object characteristics. There is one for every file and dir in
261 #define BTRFS_INODE_ITEM_KEY 1
264 * dir items are the name -> inode pointers in a directory. There is one
265 * for every name in a directory.
267 #define BTRFS_DIR_ITEM_KEY 2
269 * inline data is file data that fits in the btree.
271 #define BTRFS_INLINE_DATA_KEY 3
273 * extent data is for data that can't fit in the btree. It points to
274 * a (hopefully) huge chunk of disk
276 #define BTRFS_EXTENT_DATA_KEY 4
278 * root items point to tree roots. There are typically in the root
279 * tree used by the super block to find all the other trees
281 #define BTRFS_ROOT_ITEM_KEY 5
283 * extent items are in the extent map tree. These record which blocks
284 * are used, and how many references there are to each block
286 #define BTRFS_EXTENT_ITEM_KEY 6
289 * the inode map records which inode numbers are in use and where
290 * they actually live on disk
292 #define BTRFS_INODE_MAP_ITEM_KEY 7
294 * string items are for debugging. They just store a short string of
297 #define BTRFS_STRING_ITEM_KEY 8
299 static inline u64
btrfs_inode_generation(struct btrfs_inode_item
*i
)
301 return le64_to_cpu(i
->generation
);
304 static inline void btrfs_set_inode_generation(struct btrfs_inode_item
*i
,
307 i
->generation
= cpu_to_le64(val
);
310 static inline u64
btrfs_inode_size(struct btrfs_inode_item
*i
)
312 return le64_to_cpu(i
->size
);
315 static inline void btrfs_set_inode_size(struct btrfs_inode_item
*i
, u64 val
)
317 i
->size
= cpu_to_le64(val
);
320 static inline u64
btrfs_inode_nblocks(struct btrfs_inode_item
*i
)
322 return le64_to_cpu(i
->nblocks
);
325 static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item
*i
, u64 val
)
327 i
->nblocks
= cpu_to_le64(val
);
330 static inline u32
btrfs_inode_nlink(struct btrfs_inode_item
*i
)
332 return le32_to_cpu(i
->nlink
);
335 static inline void btrfs_set_inode_nlink(struct btrfs_inode_item
*i
, u32 val
)
337 i
->nlink
= cpu_to_le32(val
);
340 static inline u32
btrfs_inode_uid(struct btrfs_inode_item
*i
)
342 return le32_to_cpu(i
->uid
);
345 static inline void btrfs_set_inode_uid(struct btrfs_inode_item
*i
, u32 val
)
347 i
->uid
= cpu_to_le32(val
);
350 static inline u32
btrfs_inode_gid(struct btrfs_inode_item
*i
)
352 return le32_to_cpu(i
->gid
);
355 static inline void btrfs_set_inode_gid(struct btrfs_inode_item
*i
, u32 val
)
357 i
->gid
= cpu_to_le32(val
);
360 static inline u32
btrfs_inode_mode(struct btrfs_inode_item
*i
)
362 return le32_to_cpu(i
->mode
);
365 static inline void btrfs_set_inode_mode(struct btrfs_inode_item
*i
, u32 val
)
367 i
->mode
= cpu_to_le32(val
);
370 static inline u32
btrfs_inode_rdev(struct btrfs_inode_item
*i
)
372 return le32_to_cpu(i
->rdev
);
375 static inline void btrfs_set_inode_rdev(struct btrfs_inode_item
*i
, u32 val
)
377 i
->rdev
= cpu_to_le32(val
);
380 static inline u16
btrfs_inode_flags(struct btrfs_inode_item
*i
)
382 return le16_to_cpu(i
->flags
);
385 static inline void btrfs_set_inode_flags(struct btrfs_inode_item
*i
, u16 val
)
387 i
->flags
= cpu_to_le16(val
);
390 static inline u16
btrfs_inode_compat_flags(struct btrfs_inode_item
*i
)
392 return le16_to_cpu(i
->compat_flags
);
395 static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item
*i
,
398 i
->compat_flags
= cpu_to_le16(val
);
401 static inline u32
btrfs_timespec_sec(struct btrfs_inode_timespec
*ts
)
403 return le32_to_cpu(ts
->sec
);
406 static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec
*ts
,
409 ts
->sec
= cpu_to_le32(val
);
412 static inline u32
btrfs_timespec_nsec(struct btrfs_inode_timespec
*ts
)
414 return le32_to_cpu(ts
->nsec
);
417 static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec
*ts
,
420 ts
->nsec
= cpu_to_le32(val
);
425 static inline u64
btrfs_extent_owner(struct btrfs_extent_item
*ei
)
427 return le64_to_cpu(ei
->owner
);
430 static inline void btrfs_set_extent_owner(struct btrfs_extent_item
*ei
, u64 val
)
432 ei
->owner
= cpu_to_le64(val
);
435 static inline u32
btrfs_extent_refs(struct btrfs_extent_item
*ei
)
437 return le32_to_cpu(ei
->refs
);
440 static inline void btrfs_set_extent_refs(struct btrfs_extent_item
*ei
, u32 val
)
442 ei
->refs
= cpu_to_le32(val
);
445 static inline u64
btrfs_node_blockptr(struct btrfs_node
*n
, int nr
)
447 return le64_to_cpu(n
->ptrs
[nr
].blockptr
);
450 static inline void btrfs_set_node_blockptr(struct btrfs_node
*n
, int nr
,
453 n
->ptrs
[nr
].blockptr
= cpu_to_le64(val
);
456 static inline u32
btrfs_item_offset(struct btrfs_item
*item
)
458 return le32_to_cpu(item
->offset
);
461 static inline void btrfs_set_item_offset(struct btrfs_item
*item
, u32 val
)
463 item
->offset
= cpu_to_le32(val
);
466 static inline u32
btrfs_item_end(struct btrfs_item
*item
)
468 return le32_to_cpu(item
->offset
) + le16_to_cpu(item
->size
);
471 static inline u16
btrfs_item_size(struct btrfs_item
*item
)
473 return le16_to_cpu(item
->size
);
476 static inline void btrfs_set_item_size(struct btrfs_item
*item
, u16 val
)
478 item
->size
= cpu_to_le16(val
);
481 static inline u64
btrfs_dir_objectid(struct btrfs_dir_item
*d
)
483 return le64_to_cpu(d
->objectid
);
486 static inline void btrfs_set_dir_objectid(struct btrfs_dir_item
*d
, u64 val
)
488 d
->objectid
= cpu_to_le64(val
);
491 static inline u16
btrfs_dir_flags(struct btrfs_dir_item
*d
)
493 return le16_to_cpu(d
->flags
);
496 static inline void btrfs_set_dir_flags(struct btrfs_dir_item
*d
, u16 val
)
498 d
->flags
= cpu_to_le16(val
);
501 static inline u8
btrfs_dir_type(struct btrfs_dir_item
*d
)
506 static inline void btrfs_set_dir_type(struct btrfs_dir_item
*d
, u8 val
)
511 static inline u16
btrfs_dir_name_len(struct btrfs_dir_item
*d
)
513 return le16_to_cpu(d
->name_len
);
516 static inline void btrfs_set_dir_name_len(struct btrfs_dir_item
*d
, u16 val
)
518 d
->name_len
= cpu_to_le16(val
);
521 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
522 struct btrfs_disk_key
*disk
)
524 cpu
->offset
= le64_to_cpu(disk
->offset
);
525 cpu
->flags
= le32_to_cpu(disk
->flags
);
526 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
529 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
530 struct btrfs_key
*cpu
)
532 disk
->offset
= cpu_to_le64(cpu
->offset
);
533 disk
->flags
= cpu_to_le32(cpu
->flags
);
534 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
537 static inline u64
btrfs_disk_key_objectid(struct btrfs_disk_key
*disk
)
539 return le64_to_cpu(disk
->objectid
);
542 static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key
*disk
,
545 disk
->objectid
= cpu_to_le64(val
);
548 static inline u64
btrfs_disk_key_offset(struct btrfs_disk_key
*disk
)
550 return le64_to_cpu(disk
->offset
);
553 static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key
*disk
,
556 disk
->offset
= cpu_to_le64(val
);
559 static inline u32
btrfs_disk_key_flags(struct btrfs_disk_key
*disk
)
561 return le32_to_cpu(disk
->flags
);
564 static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key
*disk
,
567 disk
->flags
= cpu_to_le32(val
);
570 static inline u32
btrfs_key_type(struct btrfs_key
*key
)
572 return key
->flags
& BTRFS_KEY_TYPE_MASK
;
575 static inline u32
btrfs_disk_key_type(struct btrfs_disk_key
*key
)
577 return le32_to_cpu(key
->flags
) & BTRFS_KEY_TYPE_MASK
;
580 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u32 type
)
582 BUG_ON(type
>= BTRFS_KEY_TYPE_MAX
);
583 key
->flags
= (key
->flags
& ~((u64
)BTRFS_KEY_TYPE_MASK
)) | type
;
586 static inline void btrfs_set_disk_key_type(struct btrfs_disk_key
*key
, u32 type
)
588 u32 flags
= btrfs_disk_key_flags(key
);
589 BUG_ON(type
>= BTRFS_KEY_TYPE_MAX
);
590 flags
= (flags
& ~((u64
)BTRFS_KEY_TYPE_MASK
)) | type
;
591 btrfs_set_disk_key_flags(key
, flags
);
594 static inline u64
btrfs_header_blocknr(struct btrfs_header
*h
)
596 return le64_to_cpu(h
->blocknr
);
599 static inline void btrfs_set_header_blocknr(struct btrfs_header
*h
, u64 blocknr
)
601 h
->blocknr
= cpu_to_le64(blocknr
);
604 static inline u64
btrfs_header_generation(struct btrfs_header
*h
)
606 return le64_to_cpu(h
->generation
);
609 static inline void btrfs_set_header_generation(struct btrfs_header
*h
,
612 h
->generation
= cpu_to_le64(val
);
615 static inline u64
btrfs_header_parentid(struct btrfs_header
*h
)
617 return le64_to_cpu(h
->parentid
);
620 static inline void btrfs_set_header_parentid(struct btrfs_header
*h
,
623 h
->parentid
= cpu_to_le64(parentid
);
626 static inline u16
btrfs_header_nritems(struct btrfs_header
*h
)
628 return le16_to_cpu(h
->nritems
);
631 static inline void btrfs_set_header_nritems(struct btrfs_header
*h
, u16 val
)
633 h
->nritems
= cpu_to_le16(val
);
636 static inline u16
btrfs_header_flags(struct btrfs_header
*h
)
638 return le16_to_cpu(h
->flags
);
641 static inline void btrfs_set_header_flags(struct btrfs_header
*h
, u16 val
)
643 h
->flags
= cpu_to_le16(val
);
646 static inline int btrfs_header_level(struct btrfs_header
*h
)
648 return btrfs_header_flags(h
) & (BTRFS_MAX_LEVEL
- 1);
651 static inline void btrfs_set_header_level(struct btrfs_header
*h
, int level
)
654 BUG_ON(level
> BTRFS_MAX_LEVEL
);
655 flags
= btrfs_header_flags(h
) & ~(BTRFS_MAX_LEVEL
- 1);
656 btrfs_set_header_flags(h
, flags
| level
);
659 static inline int btrfs_is_leaf(struct btrfs_node
*n
)
661 return (btrfs_header_level(&n
->header
) == 0);
664 static inline u64
btrfs_root_blocknr(struct btrfs_root_item
*item
)
666 return le64_to_cpu(item
->blocknr
);
669 static inline void btrfs_set_root_blocknr(struct btrfs_root_item
*item
, u64 val
)
671 item
->blocknr
= cpu_to_le64(val
);
674 static inline u32
btrfs_root_refs(struct btrfs_root_item
*item
)
676 return le32_to_cpu(item
->refs
);
679 static inline void btrfs_set_root_refs(struct btrfs_root_item
*item
, u32 val
)
681 item
->refs
= cpu_to_le32(val
);
684 static inline u64
btrfs_super_blocknr(struct btrfs_super_block
*s
)
686 return le64_to_cpu(s
->blocknr
);
689 static inline void btrfs_set_super_blocknr(struct btrfs_super_block
*s
, u64 val
)
691 s
->blocknr
= cpu_to_le64(val
);
694 static inline u64
btrfs_super_root(struct btrfs_super_block
*s
)
696 return le64_to_cpu(s
->root
);
699 static inline void btrfs_set_super_root(struct btrfs_super_block
*s
, u64 val
)
701 s
->root
= cpu_to_le64(val
);
704 static inline u64
btrfs_super_total_blocks(struct btrfs_super_block
*s
)
706 return le64_to_cpu(s
->total_blocks
);
709 static inline void btrfs_set_super_total_blocks(struct btrfs_super_block
*s
,
712 s
->total_blocks
= cpu_to_le64(val
);
715 static inline u64
btrfs_super_blocks_used(struct btrfs_super_block
*s
)
717 return le64_to_cpu(s
->blocks_used
);
720 static inline void btrfs_set_super_blocks_used(struct btrfs_super_block
*s
,
723 s
->blocks_used
= cpu_to_le64(val
);
726 static inline u32
btrfs_super_blocksize(struct btrfs_super_block
*s
)
728 return le32_to_cpu(s
->blocksize
);
731 static inline void btrfs_set_super_blocksize(struct btrfs_super_block
*s
,
734 s
->blocksize
= cpu_to_le32(val
);
737 static inline u64
btrfs_super_root_dir(struct btrfs_super_block
*s
)
739 return le64_to_cpu(s
->root_dir_objectid
);
742 static inline void btrfs_set_super_root_dir(struct btrfs_super_block
*s
, u64
745 s
->root_dir_objectid
= cpu_to_le64(val
);
748 static inline u8
*btrfs_leaf_data(struct btrfs_leaf
*l
)
750 return (u8
*)l
->items
;
753 static inline u64
btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item
756 return le64_to_cpu(e
->disk_blocknr
);
759 static inline void btrfs_set_file_extent_disk_blocknr(struct
760 btrfs_file_extent_item
763 e
->disk_blocknr
= cpu_to_le64(val
);
766 static inline u64
btrfs_file_extent_disk_num_blocks(struct
767 btrfs_file_extent_item
*e
)
769 return le64_to_cpu(e
->disk_num_blocks
);
772 static inline void btrfs_set_file_extent_disk_num_blocks(struct
773 btrfs_file_extent_item
776 e
->disk_num_blocks
= cpu_to_le64(val
);
779 static inline u64
btrfs_file_extent_offset(struct btrfs_file_extent_item
*e
)
781 return le64_to_cpu(e
->offset
);
784 static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item
787 e
->offset
= cpu_to_le64(val
);
790 static inline u64
btrfs_file_extent_num_blocks(struct btrfs_file_extent_item
793 return le64_to_cpu(e
->num_blocks
);
796 static inline void btrfs_set_file_extent_num_blocks(struct
797 btrfs_file_extent_item
*e
,
800 e
->num_blocks
= cpu_to_le64(val
);
803 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
805 return sb
->s_fs_info
;
808 /* helper function to cast into the data area of the leaf. */
809 #define btrfs_item_ptr(leaf, slot, type) \
810 ((type *)(btrfs_leaf_data(leaf) + \
811 btrfs_item_offset((leaf)->items + (slot))))
813 struct buffer_head
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
814 struct btrfs_root
*root
);
815 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
816 struct buffer_head
*buf
);
817 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
818 *root
, u64 blocknr
, u64 num_blocks
, int pin
);
819 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
820 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
822 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
823 void btrfs_init_path(struct btrfs_path
*p
);
824 int btrfs_del_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
825 struct btrfs_path
*path
);
826 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
827 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
828 int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
829 *root
, struct btrfs_path
*path
, struct btrfs_key
830 *cpu_key
, u32 data_size
);
831 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
832 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct btrfs_leaf
*leaf
);
833 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
834 *root
, struct buffer_head
*snap
);
835 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
, struct
837 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
838 struct btrfs_key
*key
);
839 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
840 *root
, struct btrfs_key
*key
, struct btrfs_root_item
842 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
843 *root
, struct btrfs_key
*key
, struct btrfs_root_item
845 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
846 btrfs_root_item
*item
, struct btrfs_key
*key
);
847 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
848 *root
, const char *name
, int name_len
, u64 dir
, u64
850 int btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
851 *root
, struct btrfs_path
*path
, u64 dir
,
852 const char *name
, int name_len
, int mod
);
853 int btrfs_match_dir_item_name(struct btrfs_root
*root
, struct btrfs_path
*path
,
854 const char *name
, int name_len
);
855 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
856 struct btrfs_root
*fs_root
,
857 u64 dirid
, u64
*objectid
);
858 int btrfs_insert_inode_map(struct btrfs_trans_handle
*trans
,
859 struct btrfs_root
*root
,
860 u64 objectid
, struct btrfs_key
*location
);
861 int btrfs_lookup_inode_map(struct btrfs_trans_handle
*trans
,
862 struct btrfs_root
*root
, struct btrfs_path
*path
,
863 u64 objectid
, int mod
);
864 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
865 *root
, u64 objectid
, struct btrfs_inode_item
867 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
868 *root
, struct btrfs_path
*path
, u64 objectid
, int mod
);