7 struct btrfs_trans_handle;
8 struct btrfs_transaction;
10 #define BTRFS_MAGIC "_BtRfS_M"
12 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
13 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
14 #define BTRFS_INODE_MAP_OBJECTID 3ULL
15 #define BTRFS_FS_TREE_OBJECTID 4ULL
16 #define BTRFS_FIRST_FREE_OBJECTID 5ULL
19 * we can actually store much bigger names, but lets not confuse the rest
22 #define BTRFS_NAME_LEN 255
24 /* 32 bytes in various csum fields */
25 #define BTRFS_CSUM_SIZE 32
28 * the key defines the order in the tree, and so it also defines (optimal)
29 * block layout. objectid corresonds to the inode number. The flags
30 * tells us things about the object, and is a kind of stream selector.
31 * so for a given inode, keys with flags of 1 might refer to the inode
32 * data, flags of 2 may point to file data in the btree and flags == 3
33 * may point to extents.
35 * offset is the starting byte offset for this key in the stream.
37 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
38 * in cpu native order. Otherwise they are identical and their sizes
39 * should be the same (ie both packed)
41 struct btrfs_disk_key {
45 } __attribute__ ((__packed__));
51 } __attribute__ ((__packed__));
54 * every tree block (leaf or node) starts with this header.
57 u8 csum[BTRFS_CSUM_SIZE];
58 u8 fsid[16]; /* FS specific uuid */
59 __le64 blocknr; /* which block this node is supposed to live in */
61 __le64 parentid; /* objectid of the tree root */
66 } __attribute__ ((__packed__));
68 #define BTRFS_MAX_LEVEL 8
69 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \
70 sizeof(struct btrfs_header)) / \
71 (sizeof(struct btrfs_disk_key) + sizeof(u64)))
72 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
73 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize))
77 * the super block basically lists the main trees of the FS
78 * it currently lacks any block count etc etc
80 struct btrfs_super_block {
81 u8 csum[BTRFS_CSUM_SIZE];
82 /* the first 3 fields must match struct btrfs_header */
83 u8 fsid[16]; /* FS specific uuid */
84 __le64 blocknr; /* this block number */
91 __le64 root_dir_objectid;
92 } __attribute__ ((__packed__));
95 * A leaf is full of items. offset and size tell us where to find
96 * the item in the leaf (relative to the start of the data area)
99 struct btrfs_disk_key key;
102 } __attribute__ ((__packed__));
105 * leaves have an item area and a data area:
106 * [item0, item1....itemN] [free space] [dataN...data1, data0]
108 * The data is separate from the items to get the keys closer together
112 struct btrfs_header header;
113 struct btrfs_item items[];
114 } __attribute__ ((__packed__));
117 * all non-leaf blocks are nodes, they hold only keys and pointers to
120 struct btrfs_key_ptr {
121 struct btrfs_disk_key key;
123 } __attribute__ ((__packed__));
126 struct btrfs_header header;
127 struct btrfs_key_ptr ptrs[];
128 } __attribute__ ((__packed__));
131 * btrfs_paths remember the path taken from the root down to the leaf.
132 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
133 * to any other levels that are present.
135 * The slots array records the index of the item or block pointer
136 * used while walking the tree.
139 struct buffer_head *nodes[BTRFS_MAX_LEVEL];
140 int slots[BTRFS_MAX_LEVEL];
144 * items in the extent btree are used to record the objectid of the
145 * owner of the block and the number of references
147 struct btrfs_extent_item {
150 } __attribute__ ((__packed__));
152 struct btrfs_inode_timespec {
155 } __attribute__ ((__packed__));
158 * there is no padding here on purpose. If you want to extent the inode,
159 * make a new item type
161 struct btrfs_inode_item {
172 struct btrfs_inode_timespec atime;
173 struct btrfs_inode_timespec ctime;
174 struct btrfs_inode_timespec mtime;
175 struct btrfs_inode_timespec otime;
176 } __attribute__ ((__packed__));
178 /* inline data is just a blob of bytes */
179 struct btrfs_inline_data_item {
181 } __attribute__ ((__packed__));
183 struct btrfs_dir_item {
188 } __attribute__ ((__packed__));
190 struct btrfs_root_item {
196 } __attribute__ ((__packed__));
198 struct btrfs_file_extent_item {
201 * disk space consumed by the extent, checksum blocks are included
205 __le64 disk_num_blocks;
207 * the logical offset in file blocks (no csums)
208 * this extent record is for. This allows a file extent to point
209 * into the middle of an existing extent on disk, sharing it
210 * between two snapshots (useful if some bytes in the middle of the
211 * extent have changed
215 * the logical number of file blocks (no csums included)
218 } __attribute__ ((__packed__));
220 struct btrfs_csum_item {
221 u8 csum[BTRFS_CSUM_SIZE];
222 } __attribute__ ((__packed__));
224 struct btrfs_inode_map_item {
225 struct btrfs_disk_key key;
226 } __attribute__ ((__packed__));
229 struct btrfs_fs_info {
230 struct btrfs_root *fs_root;
231 struct btrfs_root *extent_root;
232 struct btrfs_root *tree_root;
233 struct btrfs_root *inode_root;
234 struct btrfs_key current_insert;
235 struct btrfs_key last_insert;
236 struct radix_tree_root pending_del_radix;
237 struct radix_tree_root pinned_radix;
238 u64 last_inode_alloc;
239 u64 last_inode_alloc_dirid;
241 struct btrfs_transaction *running_transaction;
242 struct btrfs_super_block *disk_super;
243 struct buffer_head *sb_buffer;
244 struct super_block *sb;
245 struct inode *btree_inode;
246 struct mutex trans_mutex;
247 struct mutex fs_mutex;
248 struct crypto_hash *hash_tfm;
249 spinlock_t hash_lock;
253 * in ram representation of the tree. extent_root is used for all allocations
254 * and for the extent tree extent_root root. current_insert is used
255 * only for the extent tree.
258 struct buffer_head *node;
259 struct buffer_head *commit_root;
260 struct btrfs_root_item root_item;
261 struct btrfs_key root_key;
262 struct btrfs_fs_info *fs_info;
268 /* the lower bits in the key flags defines the item type */
269 #define BTRFS_KEY_TYPE_MAX 256
270 #define BTRFS_KEY_TYPE_MASK (BTRFS_KEY_TYPE_MAX - 1)
273 * inode items have the data typically returned from stat and store other
274 * info about object characteristics. There is one for every file and dir in
277 #define BTRFS_INODE_ITEM_KEY 1
280 * dir items are the name -> inode pointers in a directory. There is one
281 * for every name in a directory.
283 #define BTRFS_DIR_ITEM_KEY 2
285 * inline data is file data that fits in the btree.
287 #define BTRFS_INLINE_DATA_KEY 3
289 * extent data is for data that can't fit in the btree. It points to
290 * a (hopefully) huge chunk of disk
292 #define BTRFS_EXTENT_DATA_KEY 4
294 * csum items have the checksums for data in the extents
296 #define BTRFS_CSUM_ITEM_KEY 5
299 * root items point to tree roots. There are typically in the root
300 * tree used by the super block to find all the other trees
302 #define BTRFS_ROOT_ITEM_KEY 6
304 * extent items are in the extent map tree. These record which blocks
305 * are used, and how many references there are to each block
307 #define BTRFS_EXTENT_ITEM_KEY 7
310 * the inode map records which inode numbers are in use and where
311 * they actually live on disk
313 #define BTRFS_INODE_MAP_ITEM_KEY 8
315 * string items are for debugging. They just store a short string of
318 #define BTRFS_STRING_ITEM_KEY 9
320 static inline u64 btrfs_inode_generation(struct btrfs_inode_item *i)
322 return le64_to_cpu(i->generation);
325 static inline void btrfs_set_inode_generation(struct btrfs_inode_item *i,
328 i->generation = cpu_to_le64(val);
331 static inline u64 btrfs_inode_size(struct btrfs_inode_item *i)
333 return le64_to_cpu(i->size);
336 static inline void btrfs_set_inode_size(struct btrfs_inode_item *i, u64 val)
338 i->size = cpu_to_le64(val);
341 static inline u64 btrfs_inode_nblocks(struct btrfs_inode_item *i)
343 return le64_to_cpu(i->nblocks);
346 static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item *i, u64 val)
348 i->nblocks = cpu_to_le64(val);
351 static inline u32 btrfs_inode_nlink(struct btrfs_inode_item *i)
353 return le32_to_cpu(i->nlink);
356 static inline void btrfs_set_inode_nlink(struct btrfs_inode_item *i, u32 val)
358 i->nlink = cpu_to_le32(val);
361 static inline u32 btrfs_inode_uid(struct btrfs_inode_item *i)
363 return le32_to_cpu(i->uid);
366 static inline void btrfs_set_inode_uid(struct btrfs_inode_item *i, u32 val)
368 i->uid = cpu_to_le32(val);
371 static inline u32 btrfs_inode_gid(struct btrfs_inode_item *i)
373 return le32_to_cpu(i->gid);
376 static inline void btrfs_set_inode_gid(struct btrfs_inode_item *i, u32 val)
378 i->gid = cpu_to_le32(val);
381 static inline u32 btrfs_inode_mode(struct btrfs_inode_item *i)
383 return le32_to_cpu(i->mode);
386 static inline void btrfs_set_inode_mode(struct btrfs_inode_item *i, u32 val)
388 i->mode = cpu_to_le32(val);
391 static inline u32 btrfs_inode_rdev(struct btrfs_inode_item *i)
393 return le32_to_cpu(i->rdev);
396 static inline void btrfs_set_inode_rdev(struct btrfs_inode_item *i, u32 val)
398 i->rdev = cpu_to_le32(val);
401 static inline u16 btrfs_inode_flags(struct btrfs_inode_item *i)
403 return le16_to_cpu(i->flags);
406 static inline void btrfs_set_inode_flags(struct btrfs_inode_item *i, u16 val)
408 i->flags = cpu_to_le16(val);
411 static inline u16 btrfs_inode_compat_flags(struct btrfs_inode_item *i)
413 return le16_to_cpu(i->compat_flags);
416 static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item *i,
419 i->compat_flags = cpu_to_le16(val);
422 static inline u64 btrfs_timespec_sec(struct btrfs_inode_timespec *ts)
424 return le64_to_cpu(ts->sec);
427 static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec *ts,
430 ts->sec = cpu_to_le64(val);
433 static inline u32 btrfs_timespec_nsec(struct btrfs_inode_timespec *ts)
435 return le32_to_cpu(ts->nsec);
438 static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec *ts,
441 ts->nsec = cpu_to_le32(val);
444 static inline u64 btrfs_extent_owner(struct btrfs_extent_item *ei)
446 return le64_to_cpu(ei->owner);
449 static inline void btrfs_set_extent_owner(struct btrfs_extent_item *ei, u64 val)
451 ei->owner = cpu_to_le64(val);
454 static inline u32 btrfs_extent_refs(struct btrfs_extent_item *ei)
456 return le32_to_cpu(ei->refs);
459 static inline void btrfs_set_extent_refs(struct btrfs_extent_item *ei, u32 val)
461 ei->refs = cpu_to_le32(val);
464 static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr)
466 return le64_to_cpu(n->ptrs[nr].blockptr);
469 static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr,
472 n->ptrs[nr].blockptr = cpu_to_le64(val);
475 static inline u32 btrfs_item_offset(struct btrfs_item *item)
477 return le32_to_cpu(item->offset);
480 static inline void btrfs_set_item_offset(struct btrfs_item *item, u32 val)
482 item->offset = cpu_to_le32(val);
485 static inline u32 btrfs_item_end(struct btrfs_item *item)
487 return le32_to_cpu(item->offset) + le16_to_cpu(item->size);
490 static inline u16 btrfs_item_size(struct btrfs_item *item)
492 return le16_to_cpu(item->size);
495 static inline void btrfs_set_item_size(struct btrfs_item *item, u16 val)
497 item->size = cpu_to_le16(val);
500 static inline u64 btrfs_dir_objectid(struct btrfs_dir_item *d)
502 return le64_to_cpu(d->objectid);
505 static inline void btrfs_set_dir_objectid(struct btrfs_dir_item *d, u64 val)
507 d->objectid = cpu_to_le64(val);
510 static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d)
512 return le16_to_cpu(d->flags);
515 static inline void btrfs_set_dir_flags(struct btrfs_dir_item *d, u16 val)
517 d->flags = cpu_to_le16(val);
520 static inline u8 btrfs_dir_type(struct btrfs_dir_item *d)
525 static inline void btrfs_set_dir_type(struct btrfs_dir_item *d, u8 val)
530 static inline u16 btrfs_dir_name_len(struct btrfs_dir_item *d)
532 return le16_to_cpu(d->name_len);
535 static inline void btrfs_set_dir_name_len(struct btrfs_dir_item *d, u16 val)
537 d->name_len = cpu_to_le16(val);
540 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
541 struct btrfs_disk_key *disk)
543 cpu->offset = le64_to_cpu(disk->offset);
544 cpu->flags = le32_to_cpu(disk->flags);
545 cpu->objectid = le64_to_cpu(disk->objectid);
548 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
549 struct btrfs_key *cpu)
551 disk->offset = cpu_to_le64(cpu->offset);
552 disk->flags = cpu_to_le32(cpu->flags);
553 disk->objectid = cpu_to_le64(cpu->objectid);
556 static inline u64 btrfs_disk_key_objectid(struct btrfs_disk_key *disk)
558 return le64_to_cpu(disk->objectid);
561 static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key *disk,
564 disk->objectid = cpu_to_le64(val);
567 static inline u64 btrfs_disk_key_offset(struct btrfs_disk_key *disk)
569 return le64_to_cpu(disk->offset);
572 static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key *disk,
575 disk->offset = cpu_to_le64(val);
578 static inline u32 btrfs_disk_key_flags(struct btrfs_disk_key *disk)
580 return le32_to_cpu(disk->flags);
583 static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key *disk,
586 disk->flags = cpu_to_le32(val);
589 static inline u32 btrfs_key_type(struct btrfs_key *key)
591 return key->flags & BTRFS_KEY_TYPE_MASK;
594 static inline u32 btrfs_disk_key_type(struct btrfs_disk_key *key)
596 return le32_to_cpu(key->flags) & BTRFS_KEY_TYPE_MASK;
599 static inline void btrfs_set_key_type(struct btrfs_key *key, u32 type)
601 BUG_ON(type >= BTRFS_KEY_TYPE_MAX);
602 key->flags = (key->flags & ~((u64)BTRFS_KEY_TYPE_MASK)) | type;
605 static inline void btrfs_set_disk_key_type(struct btrfs_disk_key *key, u32 type)
607 u32 flags = btrfs_disk_key_flags(key);
608 BUG_ON(type >= BTRFS_KEY_TYPE_MAX);
609 flags = (flags & ~((u64)BTRFS_KEY_TYPE_MASK)) | type;
610 btrfs_set_disk_key_flags(key, flags);
613 static inline u64 btrfs_header_blocknr(struct btrfs_header *h)
615 return le64_to_cpu(h->blocknr);
618 static inline void btrfs_set_header_blocknr(struct btrfs_header *h, u64 blocknr)
620 h->blocknr = cpu_to_le64(blocknr);
623 static inline u64 btrfs_header_generation(struct btrfs_header *h)
625 return le64_to_cpu(h->generation);
628 static inline void btrfs_set_header_generation(struct btrfs_header *h,
631 h->generation = cpu_to_le64(val);
634 static inline u64 btrfs_header_parentid(struct btrfs_header *h)
636 return le64_to_cpu(h->parentid);
639 static inline void btrfs_set_header_parentid(struct btrfs_header *h,
642 h->parentid = cpu_to_le64(parentid);
645 static inline u16 btrfs_header_nritems(struct btrfs_header *h)
647 return le16_to_cpu(h->nritems);
650 static inline void btrfs_set_header_nritems(struct btrfs_header *h, u16 val)
652 h->nritems = cpu_to_le16(val);
655 static inline u16 btrfs_header_flags(struct btrfs_header *h)
657 return le16_to_cpu(h->flags);
660 static inline void btrfs_set_header_flags(struct btrfs_header *h, u16 val)
662 h->flags = cpu_to_le16(val);
665 static inline int btrfs_header_level(struct btrfs_header *h)
670 static inline void btrfs_set_header_level(struct btrfs_header *h, int level)
672 BUG_ON(level > BTRFS_MAX_LEVEL);
676 static inline int btrfs_is_leaf(struct btrfs_node *n)
678 return (btrfs_header_level(&n->header) == 0);
681 static inline u64 btrfs_root_blocknr(struct btrfs_root_item *item)
683 return le64_to_cpu(item->blocknr);
686 static inline void btrfs_set_root_blocknr(struct btrfs_root_item *item, u64 val)
688 item->blocknr = cpu_to_le64(val);
691 static inline u32 btrfs_root_refs(struct btrfs_root_item *item)
693 return le32_to_cpu(item->refs);
696 static inline void btrfs_set_root_refs(struct btrfs_root_item *item, u32 val)
698 item->refs = cpu_to_le32(val);
701 static inline u64 btrfs_super_blocknr(struct btrfs_super_block *s)
703 return le64_to_cpu(s->blocknr);
706 static inline void btrfs_set_super_blocknr(struct btrfs_super_block *s, u64 val)
708 s->blocknr = cpu_to_le64(val);
711 static inline u64 btrfs_super_root(struct btrfs_super_block *s)
713 return le64_to_cpu(s->root);
716 static inline void btrfs_set_super_root(struct btrfs_super_block *s, u64 val)
718 s->root = cpu_to_le64(val);
721 static inline u64 btrfs_super_total_blocks(struct btrfs_super_block *s)
723 return le64_to_cpu(s->total_blocks);
726 static inline void btrfs_set_super_total_blocks(struct btrfs_super_block *s,
729 s->total_blocks = cpu_to_le64(val);
732 static inline u64 btrfs_super_blocks_used(struct btrfs_super_block *s)
734 return le64_to_cpu(s->blocks_used);
737 static inline void btrfs_set_super_blocks_used(struct btrfs_super_block *s,
740 s->blocks_used = cpu_to_le64(val);
743 static inline u32 btrfs_super_blocksize(struct btrfs_super_block *s)
745 return le32_to_cpu(s->blocksize);
748 static inline void btrfs_set_super_blocksize(struct btrfs_super_block *s,
751 s->blocksize = cpu_to_le32(val);
754 static inline u64 btrfs_super_root_dir(struct btrfs_super_block *s)
756 return le64_to_cpu(s->root_dir_objectid);
759 static inline void btrfs_set_super_root_dir(struct btrfs_super_block *s, u64
762 s->root_dir_objectid = cpu_to_le64(val);
765 static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l)
767 return (u8 *)l->items;
770 static inline u64 btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item
773 return le64_to_cpu(e->disk_blocknr);
776 static inline void btrfs_set_file_extent_disk_blocknr(struct
777 btrfs_file_extent_item
780 e->disk_blocknr = cpu_to_le64(val);
783 static inline u64 btrfs_file_extent_generation(struct btrfs_file_extent_item *e)
785 return le64_to_cpu(e->generation);
788 static inline void btrfs_set_file_extent_generation(struct
789 btrfs_file_extent_item *e,
792 e->generation = cpu_to_le64(val);
795 static inline u64 btrfs_file_extent_disk_num_blocks(struct
796 btrfs_file_extent_item *e)
798 return le64_to_cpu(e->disk_num_blocks);
801 static inline void btrfs_set_file_extent_disk_num_blocks(struct
802 btrfs_file_extent_item
805 e->disk_num_blocks = cpu_to_le64(val);
808 static inline u64 btrfs_file_extent_offset(struct btrfs_file_extent_item *e)
810 return le64_to_cpu(e->offset);
813 static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item
816 e->offset = cpu_to_le64(val);
819 static inline u64 btrfs_file_extent_num_blocks(struct btrfs_file_extent_item
822 return le64_to_cpu(e->num_blocks);
825 static inline void btrfs_set_file_extent_num_blocks(struct
826 btrfs_file_extent_item *e,
829 e->num_blocks = cpu_to_le64(val);
832 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
834 return sb->s_fs_info;
837 /* helper function to cast into the data area of the leaf. */
838 #define btrfs_item_ptr(leaf, slot, type) \
839 ((type *)(btrfs_leaf_data(leaf) + \
840 btrfs_item_offset((leaf)->items + (slot))))
843 struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
844 struct btrfs_root *root);
845 int btrfs_alloc_extent(struct btrfs_trans_handle *trans, struct btrfs_root
846 *root, u64 num_blocks, u64 search_start, u64
847 search_end, u64 owner, struct btrfs_key *ins);
848 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
849 struct buffer_head *buf);
850 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
851 *root, u64 blocknr, u64 num_blocks, int pin);
852 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct
855 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
856 *root, struct btrfs_key *key, struct btrfs_path *p, int
858 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
859 void btrfs_init_path(struct btrfs_path *p);
860 int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
861 struct btrfs_path *path);
862 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
863 *root, struct btrfs_key *key, void *data, u32 data_size);
864 int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root
865 *root, struct btrfs_path *path, struct btrfs_key
866 *cpu_key, u32 data_size);
867 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
868 int btrfs_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf);
869 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
870 *root, struct buffer_head *snap);
872 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
873 struct btrfs_key *key);
874 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
875 *root, struct btrfs_key *key, struct btrfs_root_item
877 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
878 *root, struct btrfs_key *key, struct btrfs_root_item
880 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
881 btrfs_root_item *item, struct btrfs_key *key);
883 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
884 *root, const char *name, int name_len, u64 dir, u64
886 int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
887 *root, struct btrfs_path *path, u64 dir,
888 const char *name, int name_len, int mod);
889 int btrfs_match_dir_item_name(struct btrfs_root *root, struct btrfs_path *path,
890 const char *name, int name_len);
892 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
893 struct btrfs_root *fs_root,
894 u64 dirid, u64 *objectid);
895 int btrfs_insert_inode_map(struct btrfs_trans_handle *trans,
896 struct btrfs_root *root,
897 u64 objectid, struct btrfs_key *location);
898 int btrfs_lookup_inode_map(struct btrfs_trans_handle *trans,
899 struct btrfs_root *root, struct btrfs_path *path,
900 u64 objectid, int mod);
902 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
903 *root, u64 objectid, struct btrfs_inode_item
905 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
906 *root, struct btrfs_path *path, u64 objectid, int mod);
909 int btrfs_alloc_file_extent(struct btrfs_trans_handle *trans,
910 struct btrfs_root *root,
911 u64 objectid, u64 offset,
912 u64 num_blocks, u64 hint_block,
914 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
915 struct btrfs_root *root,
916 struct btrfs_path *path, u64 objectid,
917 u64 blocknr, int mod);
918 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
919 struct btrfs_root *root,
920 u64 objectid, u64 offset,
921 char *data, size_t len);
922 int btrfs_csum_verify_file_block(struct btrfs_root *root,
923 u64 objectid, u64 offset,
924 char *data, size_t len);