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
285 #define BTRFS_DIR_INDEX_KEY 3
287 * inline data is file data that fits in the btree.
289 #define BTRFS_INLINE_DATA_KEY 4
291 * extent data is for data that can't fit in the btree. It points to
292 * a (hopefully) huge chunk of disk
294 #define BTRFS_EXTENT_DATA_KEY 5
296 * csum items have the checksums for data in the extents
298 #define BTRFS_CSUM_ITEM_KEY 6
301 * root items point to tree roots. There are typically in the root
302 * tree used by the super block to find all the other trees
304 #define BTRFS_ROOT_ITEM_KEY 7
306 * extent items are in the extent map tree. These record which blocks
307 * are used, and how many references there are to each block
309 #define BTRFS_EXTENT_ITEM_KEY 8
312 * the inode map records which inode numbers are in use and where
313 * they actually live on disk
315 #define BTRFS_INODE_MAP_ITEM_KEY 9
317 * string items are for debugging. They just store a short string of
320 #define BTRFS_STRING_ITEM_KEY 10
322 static inline u64 btrfs_inode_generation(struct btrfs_inode_item *i)
324 return le64_to_cpu(i->generation);
327 static inline void btrfs_set_inode_generation(struct btrfs_inode_item *i,
330 i->generation = cpu_to_le64(val);
333 static inline u64 btrfs_inode_size(struct btrfs_inode_item *i)
335 return le64_to_cpu(i->size);
338 static inline void btrfs_set_inode_size(struct btrfs_inode_item *i, u64 val)
340 i->size = cpu_to_le64(val);
343 static inline u64 btrfs_inode_nblocks(struct btrfs_inode_item *i)
345 return le64_to_cpu(i->nblocks);
348 static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item *i, u64 val)
350 i->nblocks = cpu_to_le64(val);
353 static inline u32 btrfs_inode_nlink(struct btrfs_inode_item *i)
355 return le32_to_cpu(i->nlink);
358 static inline void btrfs_set_inode_nlink(struct btrfs_inode_item *i, u32 val)
360 i->nlink = cpu_to_le32(val);
363 static inline u32 btrfs_inode_uid(struct btrfs_inode_item *i)
365 return le32_to_cpu(i->uid);
368 static inline void btrfs_set_inode_uid(struct btrfs_inode_item *i, u32 val)
370 i->uid = cpu_to_le32(val);
373 static inline u32 btrfs_inode_gid(struct btrfs_inode_item *i)
375 return le32_to_cpu(i->gid);
378 static inline void btrfs_set_inode_gid(struct btrfs_inode_item *i, u32 val)
380 i->gid = cpu_to_le32(val);
383 static inline u32 btrfs_inode_mode(struct btrfs_inode_item *i)
385 return le32_to_cpu(i->mode);
388 static inline void btrfs_set_inode_mode(struct btrfs_inode_item *i, u32 val)
390 i->mode = cpu_to_le32(val);
393 static inline u32 btrfs_inode_rdev(struct btrfs_inode_item *i)
395 return le32_to_cpu(i->rdev);
398 static inline void btrfs_set_inode_rdev(struct btrfs_inode_item *i, u32 val)
400 i->rdev = cpu_to_le32(val);
403 static inline u16 btrfs_inode_flags(struct btrfs_inode_item *i)
405 return le16_to_cpu(i->flags);
408 static inline void btrfs_set_inode_flags(struct btrfs_inode_item *i, u16 val)
410 i->flags = cpu_to_le16(val);
413 static inline u16 btrfs_inode_compat_flags(struct btrfs_inode_item *i)
415 return le16_to_cpu(i->compat_flags);
418 static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item *i,
421 i->compat_flags = cpu_to_le16(val);
424 static inline u64 btrfs_timespec_sec(struct btrfs_inode_timespec *ts)
426 return le64_to_cpu(ts->sec);
429 static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec *ts,
432 ts->sec = cpu_to_le64(val);
435 static inline u32 btrfs_timespec_nsec(struct btrfs_inode_timespec *ts)
437 return le32_to_cpu(ts->nsec);
440 static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec *ts,
443 ts->nsec = cpu_to_le32(val);
446 static inline u64 btrfs_extent_owner(struct btrfs_extent_item *ei)
448 return le64_to_cpu(ei->owner);
451 static inline void btrfs_set_extent_owner(struct btrfs_extent_item *ei, u64 val)
453 ei->owner = cpu_to_le64(val);
456 static inline u32 btrfs_extent_refs(struct btrfs_extent_item *ei)
458 return le32_to_cpu(ei->refs);
461 static inline void btrfs_set_extent_refs(struct btrfs_extent_item *ei, u32 val)
463 ei->refs = cpu_to_le32(val);
466 static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr)
468 return le64_to_cpu(n->ptrs[nr].blockptr);
471 static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr,
474 n->ptrs[nr].blockptr = cpu_to_le64(val);
477 static inline u32 btrfs_item_offset(struct btrfs_item *item)
479 return le32_to_cpu(item->offset);
482 static inline void btrfs_set_item_offset(struct btrfs_item *item, u32 val)
484 item->offset = cpu_to_le32(val);
487 static inline u32 btrfs_item_end(struct btrfs_item *item)
489 return le32_to_cpu(item->offset) + le16_to_cpu(item->size);
492 static inline u16 btrfs_item_size(struct btrfs_item *item)
494 return le16_to_cpu(item->size);
497 static inline void btrfs_set_item_size(struct btrfs_item *item, u16 val)
499 item->size = cpu_to_le16(val);
502 static inline u64 btrfs_dir_objectid(struct btrfs_dir_item *d)
504 return le64_to_cpu(d->objectid);
507 static inline void btrfs_set_dir_objectid(struct btrfs_dir_item *d, u64 val)
509 d->objectid = cpu_to_le64(val);
512 static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d)
514 return le16_to_cpu(d->flags);
517 static inline void btrfs_set_dir_flags(struct btrfs_dir_item *d, u16 val)
519 d->flags = cpu_to_le16(val);
522 static inline u8 btrfs_dir_type(struct btrfs_dir_item *d)
527 static inline void btrfs_set_dir_type(struct btrfs_dir_item *d, u8 val)
532 static inline u16 btrfs_dir_name_len(struct btrfs_dir_item *d)
534 return le16_to_cpu(d->name_len);
537 static inline void btrfs_set_dir_name_len(struct btrfs_dir_item *d, u16 val)
539 d->name_len = cpu_to_le16(val);
542 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
543 struct btrfs_disk_key *disk)
545 cpu->offset = le64_to_cpu(disk->offset);
546 cpu->flags = le32_to_cpu(disk->flags);
547 cpu->objectid = le64_to_cpu(disk->objectid);
550 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
551 struct btrfs_key *cpu)
553 disk->offset = cpu_to_le64(cpu->offset);
554 disk->flags = cpu_to_le32(cpu->flags);
555 disk->objectid = cpu_to_le64(cpu->objectid);
558 static inline u64 btrfs_disk_key_objectid(struct btrfs_disk_key *disk)
560 return le64_to_cpu(disk->objectid);
563 static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key *disk,
566 disk->objectid = cpu_to_le64(val);
569 static inline u64 btrfs_disk_key_offset(struct btrfs_disk_key *disk)
571 return le64_to_cpu(disk->offset);
574 static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key *disk,
577 disk->offset = cpu_to_le64(val);
580 static inline u32 btrfs_disk_key_flags(struct btrfs_disk_key *disk)
582 return le32_to_cpu(disk->flags);
585 static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key *disk,
588 disk->flags = cpu_to_le32(val);
591 static inline u32 btrfs_key_type(struct btrfs_key *key)
593 return key->flags & BTRFS_KEY_TYPE_MASK;
596 static inline u32 btrfs_disk_key_type(struct btrfs_disk_key *key)
598 return le32_to_cpu(key->flags) & BTRFS_KEY_TYPE_MASK;
601 static inline void btrfs_set_key_type(struct btrfs_key *key, u32 type)
603 BUG_ON(type >= BTRFS_KEY_TYPE_MAX);
604 key->flags = (key->flags & ~((u64)BTRFS_KEY_TYPE_MASK)) | type;
607 static inline void btrfs_set_disk_key_type(struct btrfs_disk_key *key, u32 type)
609 u32 flags = btrfs_disk_key_flags(key);
610 BUG_ON(type >= BTRFS_KEY_TYPE_MAX);
611 flags = (flags & ~((u64)BTRFS_KEY_TYPE_MASK)) | type;
612 btrfs_set_disk_key_flags(key, flags);
615 static inline u64 btrfs_header_blocknr(struct btrfs_header *h)
617 return le64_to_cpu(h->blocknr);
620 static inline void btrfs_set_header_blocknr(struct btrfs_header *h, u64 blocknr)
622 h->blocknr = cpu_to_le64(blocknr);
625 static inline u64 btrfs_header_generation(struct btrfs_header *h)
627 return le64_to_cpu(h->generation);
630 static inline void btrfs_set_header_generation(struct btrfs_header *h,
633 h->generation = cpu_to_le64(val);
636 static inline u64 btrfs_header_parentid(struct btrfs_header *h)
638 return le64_to_cpu(h->parentid);
641 static inline void btrfs_set_header_parentid(struct btrfs_header *h,
644 h->parentid = cpu_to_le64(parentid);
647 static inline u16 btrfs_header_nritems(struct btrfs_header *h)
649 return le16_to_cpu(h->nritems);
652 static inline void btrfs_set_header_nritems(struct btrfs_header *h, u16 val)
654 h->nritems = cpu_to_le16(val);
657 static inline u16 btrfs_header_flags(struct btrfs_header *h)
659 return le16_to_cpu(h->flags);
662 static inline void btrfs_set_header_flags(struct btrfs_header *h, u16 val)
664 h->flags = cpu_to_le16(val);
667 static inline int btrfs_header_level(struct btrfs_header *h)
672 static inline void btrfs_set_header_level(struct btrfs_header *h, int level)
674 BUG_ON(level > BTRFS_MAX_LEVEL);
678 static inline int btrfs_is_leaf(struct btrfs_node *n)
680 return (btrfs_header_level(&n->header) == 0);
683 static inline u64 btrfs_root_blocknr(struct btrfs_root_item *item)
685 return le64_to_cpu(item->blocknr);
688 static inline void btrfs_set_root_blocknr(struct btrfs_root_item *item, u64 val)
690 item->blocknr = cpu_to_le64(val);
693 static inline u32 btrfs_root_refs(struct btrfs_root_item *item)
695 return le32_to_cpu(item->refs);
698 static inline void btrfs_set_root_refs(struct btrfs_root_item *item, u32 val)
700 item->refs = cpu_to_le32(val);
703 static inline u64 btrfs_super_blocknr(struct btrfs_super_block *s)
705 return le64_to_cpu(s->blocknr);
708 static inline void btrfs_set_super_blocknr(struct btrfs_super_block *s, u64 val)
710 s->blocknr = cpu_to_le64(val);
713 static inline u64 btrfs_super_root(struct btrfs_super_block *s)
715 return le64_to_cpu(s->root);
718 static inline void btrfs_set_super_root(struct btrfs_super_block *s, u64 val)
720 s->root = cpu_to_le64(val);
723 static inline u64 btrfs_super_total_blocks(struct btrfs_super_block *s)
725 return le64_to_cpu(s->total_blocks);
728 static inline void btrfs_set_super_total_blocks(struct btrfs_super_block *s,
731 s->total_blocks = cpu_to_le64(val);
734 static inline u64 btrfs_super_blocks_used(struct btrfs_super_block *s)
736 return le64_to_cpu(s->blocks_used);
739 static inline void btrfs_set_super_blocks_used(struct btrfs_super_block *s,
742 s->blocks_used = cpu_to_le64(val);
745 static inline u32 btrfs_super_blocksize(struct btrfs_super_block *s)
747 return le32_to_cpu(s->blocksize);
750 static inline void btrfs_set_super_blocksize(struct btrfs_super_block *s,
753 s->blocksize = cpu_to_le32(val);
756 static inline u64 btrfs_super_root_dir(struct btrfs_super_block *s)
758 return le64_to_cpu(s->root_dir_objectid);
761 static inline void btrfs_set_super_root_dir(struct btrfs_super_block *s, u64
764 s->root_dir_objectid = cpu_to_le64(val);
767 static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l)
769 return (u8 *)l->items;
772 static inline u64 btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item
775 return le64_to_cpu(e->disk_blocknr);
778 static inline void btrfs_set_file_extent_disk_blocknr(struct
779 btrfs_file_extent_item
782 e->disk_blocknr = cpu_to_le64(val);
785 static inline u64 btrfs_file_extent_generation(struct btrfs_file_extent_item *e)
787 return le64_to_cpu(e->generation);
790 static inline void btrfs_set_file_extent_generation(struct
791 btrfs_file_extent_item *e,
794 e->generation = cpu_to_le64(val);
797 static inline u64 btrfs_file_extent_disk_num_blocks(struct
798 btrfs_file_extent_item *e)
800 return le64_to_cpu(e->disk_num_blocks);
803 static inline void btrfs_set_file_extent_disk_num_blocks(struct
804 btrfs_file_extent_item
807 e->disk_num_blocks = cpu_to_le64(val);
810 static inline u64 btrfs_file_extent_offset(struct btrfs_file_extent_item *e)
812 return le64_to_cpu(e->offset);
815 static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item
818 e->offset = cpu_to_le64(val);
821 static inline u64 btrfs_file_extent_num_blocks(struct btrfs_file_extent_item
824 return le64_to_cpu(e->num_blocks);
827 static inline void btrfs_set_file_extent_num_blocks(struct
828 btrfs_file_extent_item *e,
831 e->num_blocks = cpu_to_le64(val);
834 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
836 return sb->s_fs_info;
839 static inline void btrfs_check_bounds(void *vptr, size_t len,
840 void *vcontainer, size_t container_len)
843 char *container = vcontainer;
844 WARN_ON(ptr < container);
845 WARN_ON(ptr + len > container + container_len);
848 static inline void btrfs_memcpy(struct btrfs_root *root,
850 void *dst, const void *src, size_t nr)
852 btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize);
853 memcpy(dst, src, nr);
856 static inline void btrfs_memmove(struct btrfs_root *root,
858 void *dst, void *src, size_t nr)
860 btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize);
861 memmove(dst, src, nr);
864 static inline void btrfs_mark_buffer_dirty(struct buffer_head *bh)
866 WARN_ON(!atomic_read(&bh->b_count));
867 mark_buffer_dirty(bh);
870 /* helper function to cast into the data area of the leaf. */
871 #define btrfs_item_ptr(leaf, slot, type) \
872 ((type *)(btrfs_leaf_data(leaf) + \
873 btrfs_item_offset((leaf)->items + (slot))))
876 struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
877 struct btrfs_root *root);
878 int btrfs_alloc_extent(struct btrfs_trans_handle *trans, struct btrfs_root
879 *root, u64 num_blocks, u64 search_start, u64
880 search_end, u64 owner, struct btrfs_key *ins);
881 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
882 struct buffer_head *buf);
883 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
884 *root, u64 blocknr, u64 num_blocks, int pin);
885 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct
888 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
889 *root, struct btrfs_key *key, struct btrfs_path *p, int
891 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
892 struct btrfs_path *btrfs_alloc_path(void);
893 void btrfs_free_path(struct btrfs_path *p);
894 void btrfs_init_path(struct btrfs_path *p);
895 int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
896 struct btrfs_path *path);
897 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
898 *root, struct btrfs_key *key, void *data, u32 data_size);
899 int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root
900 *root, struct btrfs_path *path, struct btrfs_key
901 *cpu_key, u32 data_size);
902 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
903 int btrfs_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf);
904 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
905 *root, struct buffer_head *snap);
907 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
908 struct btrfs_key *key);
909 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
910 *root, struct btrfs_key *key, struct btrfs_root_item
912 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
913 *root, struct btrfs_key *key, struct btrfs_root_item
915 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
916 btrfs_root_item *item, struct btrfs_key *key);
918 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
919 *root, const char *name, int name_len, u64 dir, u64
921 int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
922 *root, struct btrfs_path *path, u64 dir,
923 const char *name, int name_len, int mod);
924 int btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
925 struct btrfs_root *root,
926 struct btrfs_path *path, u64 dir,
927 u64 objectid, int mod);
928 int btrfs_match_dir_item_name(struct btrfs_root *root, struct btrfs_path *path,
929 const char *name, int name_len);
931 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
932 struct btrfs_root *fs_root,
933 u64 dirid, u64 *objectid);
934 int btrfs_insert_inode_map(struct btrfs_trans_handle *trans,
935 struct btrfs_root *root,
936 u64 objectid, struct btrfs_key *location);
937 int btrfs_lookup_inode_map(struct btrfs_trans_handle *trans,
938 struct btrfs_root *root, struct btrfs_path *path,
939 u64 objectid, int mod);
941 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
942 *root, u64 objectid, struct btrfs_inode_item
944 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
945 *root, struct btrfs_path *path, u64 objectid, int mod);
948 int btrfs_alloc_file_extent(struct btrfs_trans_handle *trans,
949 struct btrfs_root *root,
950 u64 objectid, u64 offset,
951 u64 num_blocks, u64 hint_block,
953 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
954 struct btrfs_root *root,
955 struct btrfs_path *path, u64 objectid,
956 u64 blocknr, int mod);
957 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
958 struct btrfs_root *root,
959 u64 objectid, u64 offset,
960 char *data, size_t len);
961 int btrfs_csum_verify_file_block(struct btrfs_root *root,
962 u64 objectid, u64 offset,
963 char *data, size_t len);