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;
243 struct btrfs_transaction *running_transaction;
244 struct btrfs_super_block *disk_super;
245 struct buffer_head *sb_buffer;
246 struct super_block *sb;
247 struct inode *btree_inode;
248 struct mutex trans_mutex;
249 struct mutex fs_mutex;
250 struct crypto_hash *hash_tfm;
251 spinlock_t hash_lock;
255 * in ram representation of the tree. extent_root is used for all allocations
256 * and for the extent tree extent_root root. current_insert is used
257 * only for the extent tree.
260 struct buffer_head *node;
261 struct buffer_head *commit_root;
262 struct btrfs_root_item root_item;
263 struct btrfs_key root_key;
264 struct btrfs_fs_info *fs_info;
270 /* the lower bits in the key flags defines the item type */
271 #define BTRFS_KEY_TYPE_MAX 256
272 #define BTRFS_KEY_TYPE_MASK (BTRFS_KEY_TYPE_MAX - 1)
274 #define BTRFS_KEY_OVERFLOW_MAX 128
275 #define BTRFS_KEY_OVERFLOW_SHIFT 8
276 #define BTRFS_KEY_OVERFLOW_MASK (0x7FULL << BTRFS_KEY_OVERFLOW_SHIFT)
279 * inode items have the data typically returned from stat and store other
280 * info about object characteristics. There is one for every file and dir in
283 #define BTRFS_INODE_ITEM_KEY 1
286 * dir items are the name -> inode pointers in a directory. There is one
287 * for every name in a directory.
289 #define BTRFS_DIR_ITEM_KEY 2
290 #define BTRFS_DIR_INDEX_KEY 3
292 * inline data is file data that fits in the btree.
294 #define BTRFS_INLINE_DATA_KEY 4
296 * extent data is for data that can't fit in the btree. It points to
297 * a (hopefully) huge chunk of disk
299 #define BTRFS_EXTENT_DATA_KEY 5
301 * csum items have the checksums for data in the extents
303 #define BTRFS_CSUM_ITEM_KEY 6
306 * root items point to tree roots. There are typically in the root
307 * tree used by the super block to find all the other trees
309 #define BTRFS_ROOT_ITEM_KEY 7
311 * extent items are in the extent map tree. These record which blocks
312 * are used, and how many references there are to each block
314 #define BTRFS_EXTENT_ITEM_KEY 8
317 * the inode map records which inode numbers are in use and where
318 * they actually live on disk
320 #define BTRFS_INODE_MAP_ITEM_KEY 9
322 * string items are for debugging. They just store a short string of
325 #define BTRFS_STRING_ITEM_KEY 10
327 static inline u64 btrfs_inode_generation(struct btrfs_inode_item *i)
329 return le64_to_cpu(i->generation);
332 static inline void btrfs_set_inode_generation(struct btrfs_inode_item *i,
335 i->generation = cpu_to_le64(val);
338 static inline u64 btrfs_inode_size(struct btrfs_inode_item *i)
340 return le64_to_cpu(i->size);
343 static inline void btrfs_set_inode_size(struct btrfs_inode_item *i, u64 val)
345 i->size = cpu_to_le64(val);
348 static inline u64 btrfs_inode_nblocks(struct btrfs_inode_item *i)
350 return le64_to_cpu(i->nblocks);
353 static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item *i, u64 val)
355 i->nblocks = cpu_to_le64(val);
358 static inline u32 btrfs_inode_nlink(struct btrfs_inode_item *i)
360 return le32_to_cpu(i->nlink);
363 static inline void btrfs_set_inode_nlink(struct btrfs_inode_item *i, u32 val)
365 i->nlink = cpu_to_le32(val);
368 static inline u32 btrfs_inode_uid(struct btrfs_inode_item *i)
370 return le32_to_cpu(i->uid);
373 static inline void btrfs_set_inode_uid(struct btrfs_inode_item *i, u32 val)
375 i->uid = cpu_to_le32(val);
378 static inline u32 btrfs_inode_gid(struct btrfs_inode_item *i)
380 return le32_to_cpu(i->gid);
383 static inline void btrfs_set_inode_gid(struct btrfs_inode_item *i, u32 val)
385 i->gid = cpu_to_le32(val);
388 static inline u32 btrfs_inode_mode(struct btrfs_inode_item *i)
390 return le32_to_cpu(i->mode);
393 static inline void btrfs_set_inode_mode(struct btrfs_inode_item *i, u32 val)
395 i->mode = cpu_to_le32(val);
398 static inline u32 btrfs_inode_rdev(struct btrfs_inode_item *i)
400 return le32_to_cpu(i->rdev);
403 static inline void btrfs_set_inode_rdev(struct btrfs_inode_item *i, u32 val)
405 i->rdev = cpu_to_le32(val);
408 static inline u16 btrfs_inode_flags(struct btrfs_inode_item *i)
410 return le16_to_cpu(i->flags);
413 static inline void btrfs_set_inode_flags(struct btrfs_inode_item *i, u16 val)
415 i->flags = cpu_to_le16(val);
418 static inline u16 btrfs_inode_compat_flags(struct btrfs_inode_item *i)
420 return le16_to_cpu(i->compat_flags);
423 static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item *i,
426 i->compat_flags = cpu_to_le16(val);
429 static inline u64 btrfs_timespec_sec(struct btrfs_inode_timespec *ts)
431 return le64_to_cpu(ts->sec);
434 static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec *ts,
437 ts->sec = cpu_to_le64(val);
440 static inline u32 btrfs_timespec_nsec(struct btrfs_inode_timespec *ts)
442 return le32_to_cpu(ts->nsec);
445 static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec *ts,
448 ts->nsec = cpu_to_le32(val);
451 static inline u64 btrfs_extent_owner(struct btrfs_extent_item *ei)
453 return le64_to_cpu(ei->owner);
456 static inline void btrfs_set_extent_owner(struct btrfs_extent_item *ei, u64 val)
458 ei->owner = cpu_to_le64(val);
461 static inline u32 btrfs_extent_refs(struct btrfs_extent_item *ei)
463 return le32_to_cpu(ei->refs);
466 static inline void btrfs_set_extent_refs(struct btrfs_extent_item *ei, u32 val)
468 ei->refs = cpu_to_le32(val);
471 static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr)
473 return le64_to_cpu(n->ptrs[nr].blockptr);
476 static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr,
479 n->ptrs[nr].blockptr = cpu_to_le64(val);
482 static inline u32 btrfs_item_offset(struct btrfs_item *item)
484 return le32_to_cpu(item->offset);
487 static inline void btrfs_set_item_offset(struct btrfs_item *item, u32 val)
489 item->offset = cpu_to_le32(val);
492 static inline u32 btrfs_item_end(struct btrfs_item *item)
494 return le32_to_cpu(item->offset) + le16_to_cpu(item->size);
497 static inline u16 btrfs_item_size(struct btrfs_item *item)
499 return le16_to_cpu(item->size);
502 static inline void btrfs_set_item_size(struct btrfs_item *item, u16 val)
504 item->size = cpu_to_le16(val);
507 static inline u64 btrfs_dir_objectid(struct btrfs_dir_item *d)
509 return le64_to_cpu(d->objectid);
512 static inline void btrfs_set_dir_objectid(struct btrfs_dir_item *d, u64 val)
514 d->objectid = cpu_to_le64(val);
517 static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d)
519 return le16_to_cpu(d->flags);
522 static inline void btrfs_set_dir_flags(struct btrfs_dir_item *d, u16 val)
524 d->flags = cpu_to_le16(val);
527 static inline u8 btrfs_dir_type(struct btrfs_dir_item *d)
532 static inline void btrfs_set_dir_type(struct btrfs_dir_item *d, u8 val)
537 static inline u16 btrfs_dir_name_len(struct btrfs_dir_item *d)
539 return le16_to_cpu(d->name_len);
542 static inline void btrfs_set_dir_name_len(struct btrfs_dir_item *d, u16 val)
544 d->name_len = cpu_to_le16(val);
547 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
548 struct btrfs_disk_key *disk)
550 cpu->offset = le64_to_cpu(disk->offset);
551 cpu->flags = le32_to_cpu(disk->flags);
552 cpu->objectid = le64_to_cpu(disk->objectid);
555 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
556 struct btrfs_key *cpu)
558 disk->offset = cpu_to_le64(cpu->offset);
559 disk->flags = cpu_to_le32(cpu->flags);
560 disk->objectid = cpu_to_le64(cpu->objectid);
563 static inline u64 btrfs_disk_key_objectid(struct btrfs_disk_key *disk)
565 return le64_to_cpu(disk->objectid);
568 static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key *disk,
571 disk->objectid = cpu_to_le64(val);
574 static inline u64 btrfs_disk_key_offset(struct btrfs_disk_key *disk)
576 return le64_to_cpu(disk->offset);
579 static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key *disk,
582 disk->offset = cpu_to_le64(val);
585 static inline u32 btrfs_disk_key_flags(struct btrfs_disk_key *disk)
587 return le32_to_cpu(disk->flags);
590 static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key *disk,
593 disk->flags = cpu_to_le32(val);
596 static inline u32 btrfs_key_overflow(struct btrfs_key *key)
598 u32 over = key->flags & BTRFS_KEY_OVERFLOW_MASK;
599 return over >> BTRFS_KEY_OVERFLOW_SHIFT;
602 static inline void btrfs_set_key_overflow(struct btrfs_key *key, u32 over)
604 BUG_ON(over > BTRFS_KEY_OVERFLOW_MAX);
605 over = over << BTRFS_KEY_OVERFLOW_SHIFT;
606 key->flags = (key->flags & ~((u64)BTRFS_KEY_OVERFLOW_MASK)) | over;
609 static inline u32 btrfs_key_type(struct btrfs_key *key)
611 return key->flags & BTRFS_KEY_TYPE_MASK;
614 static inline u32 btrfs_disk_key_type(struct btrfs_disk_key *key)
616 return le32_to_cpu(key->flags) & BTRFS_KEY_TYPE_MASK;
619 static inline void btrfs_set_key_type(struct btrfs_key *key, u32 type)
621 BUG_ON(type >= BTRFS_KEY_TYPE_MAX);
622 key->flags = (key->flags & ~((u64)BTRFS_KEY_TYPE_MASK)) | type;
625 static inline void btrfs_set_disk_key_type(struct btrfs_disk_key *key, u32 type)
627 u32 flags = btrfs_disk_key_flags(key);
628 BUG_ON(type >= BTRFS_KEY_TYPE_MAX);
629 flags = (flags & ~((u64)BTRFS_KEY_TYPE_MASK)) | type;
630 btrfs_set_disk_key_flags(key, flags);
633 static inline u32 btrfs_disk_key_overflow(struct btrfs_disk_key *key)
635 u32 over = le32_to_cpu(key->flags) & BTRFS_KEY_OVERFLOW_MASK;
636 return over >> BTRFS_KEY_OVERFLOW_SHIFT;
639 static inline void btrfs_set_disK_key_overflow(struct btrfs_disk_key *key,
642 u32 flags = btrfs_disk_key_flags(key);
643 BUG_ON(over > BTRFS_KEY_OVERFLOW_MAX);
644 over = over << BTRFS_KEY_OVERFLOW_SHIFT;
645 flags = (flags & ~((u64)BTRFS_KEY_OVERFLOW_MASK)) | over;
646 btrfs_set_disk_key_flags(key, flags);
649 static inline u64 btrfs_header_blocknr(struct btrfs_header *h)
651 return le64_to_cpu(h->blocknr);
654 static inline void btrfs_set_header_blocknr(struct btrfs_header *h, u64 blocknr)
656 h->blocknr = cpu_to_le64(blocknr);
659 static inline u64 btrfs_header_generation(struct btrfs_header *h)
661 return le64_to_cpu(h->generation);
664 static inline void btrfs_set_header_generation(struct btrfs_header *h,
667 h->generation = cpu_to_le64(val);
670 static inline u64 btrfs_header_parentid(struct btrfs_header *h)
672 return le64_to_cpu(h->parentid);
675 static inline void btrfs_set_header_parentid(struct btrfs_header *h,
678 h->parentid = cpu_to_le64(parentid);
681 static inline u16 btrfs_header_nritems(struct btrfs_header *h)
683 return le16_to_cpu(h->nritems);
686 static inline void btrfs_set_header_nritems(struct btrfs_header *h, u16 val)
688 h->nritems = cpu_to_le16(val);
691 static inline u16 btrfs_header_flags(struct btrfs_header *h)
693 return le16_to_cpu(h->flags);
696 static inline void btrfs_set_header_flags(struct btrfs_header *h, u16 val)
698 h->flags = cpu_to_le16(val);
701 static inline int btrfs_header_level(struct btrfs_header *h)
706 static inline void btrfs_set_header_level(struct btrfs_header *h, int level)
708 BUG_ON(level > BTRFS_MAX_LEVEL);
712 static inline int btrfs_is_leaf(struct btrfs_node *n)
714 return (btrfs_header_level(&n->header) == 0);
717 static inline u64 btrfs_root_blocknr(struct btrfs_root_item *item)
719 return le64_to_cpu(item->blocknr);
722 static inline void btrfs_set_root_blocknr(struct btrfs_root_item *item, u64 val)
724 item->blocknr = cpu_to_le64(val);
727 static inline u32 btrfs_root_refs(struct btrfs_root_item *item)
729 return le32_to_cpu(item->refs);
732 static inline void btrfs_set_root_refs(struct btrfs_root_item *item, u32 val)
734 item->refs = cpu_to_le32(val);
737 static inline u64 btrfs_super_blocknr(struct btrfs_super_block *s)
739 return le64_to_cpu(s->blocknr);
742 static inline void btrfs_set_super_blocknr(struct btrfs_super_block *s, u64 val)
744 s->blocknr = cpu_to_le64(val);
747 static inline u64 btrfs_super_root(struct btrfs_super_block *s)
749 return le64_to_cpu(s->root);
752 static inline void btrfs_set_super_root(struct btrfs_super_block *s, u64 val)
754 s->root = cpu_to_le64(val);
757 static inline u64 btrfs_super_total_blocks(struct btrfs_super_block *s)
759 return le64_to_cpu(s->total_blocks);
762 static inline void btrfs_set_super_total_blocks(struct btrfs_super_block *s,
765 s->total_blocks = cpu_to_le64(val);
768 static inline u64 btrfs_super_blocks_used(struct btrfs_super_block *s)
770 return le64_to_cpu(s->blocks_used);
773 static inline void btrfs_set_super_blocks_used(struct btrfs_super_block *s,
776 s->blocks_used = cpu_to_le64(val);
779 static inline u32 btrfs_super_blocksize(struct btrfs_super_block *s)
781 return le32_to_cpu(s->blocksize);
784 static inline void btrfs_set_super_blocksize(struct btrfs_super_block *s,
787 s->blocksize = cpu_to_le32(val);
790 static inline u64 btrfs_super_root_dir(struct btrfs_super_block *s)
792 return le64_to_cpu(s->root_dir_objectid);
795 static inline void btrfs_set_super_root_dir(struct btrfs_super_block *s, u64
798 s->root_dir_objectid = cpu_to_le64(val);
801 static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l)
803 return (u8 *)l->items;
806 static inline u64 btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item
809 return le64_to_cpu(e->disk_blocknr);
812 static inline void btrfs_set_file_extent_disk_blocknr(struct
813 btrfs_file_extent_item
816 e->disk_blocknr = cpu_to_le64(val);
819 static inline u64 btrfs_file_extent_generation(struct btrfs_file_extent_item *e)
821 return le64_to_cpu(e->generation);
824 static inline void btrfs_set_file_extent_generation(struct
825 btrfs_file_extent_item *e,
828 e->generation = cpu_to_le64(val);
831 static inline u64 btrfs_file_extent_disk_num_blocks(struct
832 btrfs_file_extent_item *e)
834 return le64_to_cpu(e->disk_num_blocks);
837 static inline void btrfs_set_file_extent_disk_num_blocks(struct
838 btrfs_file_extent_item
841 e->disk_num_blocks = cpu_to_le64(val);
844 static inline u64 btrfs_file_extent_offset(struct btrfs_file_extent_item *e)
846 return le64_to_cpu(e->offset);
849 static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item
852 e->offset = cpu_to_le64(val);
855 static inline u64 btrfs_file_extent_num_blocks(struct btrfs_file_extent_item
858 return le64_to_cpu(e->num_blocks);
861 static inline void btrfs_set_file_extent_num_blocks(struct
862 btrfs_file_extent_item *e,
865 e->num_blocks = cpu_to_le64(val);
868 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
870 return sb->s_fs_info;
873 static inline void btrfs_check_bounds(void *vptr, size_t len,
874 void *vcontainer, size_t container_len)
877 char *container = vcontainer;
878 WARN_ON(ptr < container);
879 WARN_ON(ptr + len > container + container_len);
882 static inline void btrfs_memcpy(struct btrfs_root *root,
884 void *dst, const void *src, size_t nr)
886 btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize);
887 memcpy(dst, src, nr);
890 static inline void btrfs_memmove(struct btrfs_root *root,
892 void *dst, void *src, size_t nr)
894 btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize);
895 memmove(dst, src, nr);
898 static inline void btrfs_mark_buffer_dirty(struct buffer_head *bh)
900 WARN_ON(!atomic_read(&bh->b_count));
901 mark_buffer_dirty(bh);
904 /* helper function to cast into the data area of the leaf. */
905 #define btrfs_item_ptr(leaf, slot, type) \
906 ((type *)(btrfs_leaf_data(leaf) + \
907 btrfs_item_offset((leaf)->items + (slot))))
910 struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
911 struct btrfs_root *root);
912 int btrfs_alloc_extent(struct btrfs_trans_handle *trans, struct btrfs_root
913 *root, u64 num_blocks, u64 search_start, u64
914 search_end, u64 owner, struct btrfs_key *ins);
915 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
916 struct buffer_head *buf);
917 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
918 *root, u64 blocknr, u64 num_blocks, int pin);
919 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct
922 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
923 *root, struct btrfs_key *key, struct btrfs_path *p, int
925 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
926 struct btrfs_path *btrfs_alloc_path(void);
927 void btrfs_free_path(struct btrfs_path *p);
928 void btrfs_init_path(struct btrfs_path *p);
929 int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
930 struct btrfs_path *path);
931 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
932 *root, struct btrfs_key *key, void *data, u32 data_size);
933 int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root
934 *root, struct btrfs_path *path, struct btrfs_key
935 *cpu_key, u32 data_size);
936 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
937 int btrfs_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf);
938 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
939 *root, struct buffer_head *snap);
941 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
942 struct btrfs_key *key);
943 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
944 *root, struct btrfs_key *key, struct btrfs_root_item
946 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
947 *root, struct btrfs_key *key, struct btrfs_root_item
949 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
950 btrfs_root_item *item, struct btrfs_key *key);
952 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
953 *root, const char *name, int name_len, u64 dir, u64
955 int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
956 *root, struct btrfs_path *path, u64 dir,
957 const char *name, int name_len, int mod);
958 int btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
959 struct btrfs_root *root,
960 struct btrfs_path *path, u64 dir,
961 u64 objectid, int mod);
962 int btrfs_match_dir_item_name(struct btrfs_root *root, struct btrfs_path *path,
963 const char *name, int name_len);
965 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
966 struct btrfs_root *fs_root,
967 u64 dirid, u64 *objectid);
968 int btrfs_insert_inode_map(struct btrfs_trans_handle *trans,
969 struct btrfs_root *root,
970 u64 objectid, struct btrfs_key *location);
971 int btrfs_lookup_inode_map(struct btrfs_trans_handle *trans,
972 struct btrfs_root *root, struct btrfs_path *path,
973 u64 objectid, int mod);
974 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
977 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
978 *root, u64 objectid, struct btrfs_inode_item
980 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
981 *root, struct btrfs_path *path, u64 objectid, int mod);
984 int btrfs_alloc_file_extent(struct btrfs_trans_handle *trans,
985 struct btrfs_root *root,
986 u64 objectid, u64 offset,
987 u64 num_blocks, u64 hint_block,
989 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
990 struct btrfs_root *root,
991 struct btrfs_path *path, u64 objectid,
992 u64 blocknr, int mod);
993 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
994 struct btrfs_root *root,
995 u64 objectid, u64 offset,
996 char *data, size_t len);
997 int btrfs_csum_verify_file_block(struct btrfs_root *root,
998 u64 objectid, u64 offset,
999 char *data, size_t len);