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);