2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
23 #include "kerncompat.h"
24 #include "radix-tree.h"
25 #include "extent-cache.h"
27 struct btrfs_trans_handle
;
29 #define BTRFS_MAGIC "_B2RfS_M"
31 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
32 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
33 #define BTRFS_FS_TREE_OBJECTID 3ULL
34 #define BTRFS_ROOT_TREE_DIR_OBJECTID 4ULL
35 #define BTRFS_FIRST_FREE_OBJECTID 5ULL
38 * we can actually store much bigger names, but lets not confuse the rest
41 #define BTRFS_NAME_LEN 255
43 /* 32 bytes in various csum fields */
44 #define BTRFS_CSUM_SIZE 32
45 /* four bytes for CRC32 */
46 #define BTRFS_CRC32_SIZE 4
48 #define BTRFS_FT_UNKNOWN 0
49 #define BTRFS_FT_REG_FILE 1
50 #define BTRFS_FT_DIR 2
51 #define BTRFS_FT_CHRDEV 3
52 #define BTRFS_FT_BLKDEV 4
53 #define BTRFS_FT_FIFO 5
54 #define BTRFS_FT_SOCK 6
55 #define BTRFS_FT_SYMLINK 7
56 #define BTRFS_FT_XATTR 8
57 #define BTRFS_FT_MAX 9
60 * the key defines the order in the tree, and so it also defines (optimal)
61 * block layout. objectid corresonds to the inode number. The flags
62 * tells us things about the object, and is a kind of stream selector.
63 * so for a given inode, keys with flags of 1 might refer to the inode
64 * data, flags of 2 may point to file data in the btree and flags == 3
65 * may point to extents.
67 * offset is the starting byte offset for this key in the stream.
69 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
70 * in cpu native order. Otherwise they are identical and their sizes
71 * should be the same (ie both packed)
73 struct btrfs_disk_key
{
77 } __attribute__ ((__packed__
));
83 } __attribute__ ((__packed__
));
86 * every tree block (leaf or node) starts with this header.
89 u8 csum
[BTRFS_CSUM_SIZE
];
90 u8 fsid
[16]; /* FS specific uuid */
91 __le64 bytenr
; /* which block this node is supposed to live in */
97 } __attribute__ ((__packed__
));
99 #define BTRFS_MAX_LEVEL 8
100 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
101 sizeof(struct btrfs_header)) / \
102 (sizeof(struct btrfs_disk_key) + sizeof(u64)))
103 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
104 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
108 * the super block basically lists the main trees of the FS
109 * it currently lacks any block count etc etc
111 struct btrfs_super_block
{
112 u8 csum
[BTRFS_CSUM_SIZE
];
113 /* the first 3 fields must match struct btrfs_header */
114 u8 fsid
[16]; /* FS specific uuid */
115 __le64 bytenr
; /* this block number */
121 __le64 root_dir_objectid
;
127 } __attribute__ ((__packed__
));
130 * A leaf is full of items. offset and size tell us where to find
131 * the item in the leaf (relative to the start of the data area)
134 struct btrfs_disk_key key
;
137 } __attribute__ ((__packed__
));
140 * leaves have an item area and a data area:
141 * [item0, item1....itemN] [free space] [dataN...data1, data0]
143 * The data is separate from the items to get the keys closer together
147 struct btrfs_header header
;
148 struct btrfs_item items
[];
149 } __attribute__ ((__packed__
));
152 * all non-leaf blocks are nodes, they hold only keys and pointers to
155 struct btrfs_key_ptr
{
156 struct btrfs_disk_key key
;
158 } __attribute__ ((__packed__
));
161 struct btrfs_header header
;
162 struct btrfs_key_ptr ptrs
[];
163 } __attribute__ ((__packed__
));
166 * btrfs_paths remember the path taken from the root down to the leaf.
167 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
168 * to any other levels that are present.
170 * The slots array records the index of the item or block pointer
171 * used while walking the tree.
174 struct btrfs_buffer
*nodes
[BTRFS_MAX_LEVEL
];
175 int slots
[BTRFS_MAX_LEVEL
];
179 * items in the extent btree are used to record the objectid of the
180 * owner of the block and the number of references
182 struct btrfs_extent_item
{
185 } __attribute__ ((__packed__
));
187 struct btrfs_inode_timespec
{
190 } __attribute__ ((__packed__
));
193 * there is no padding here on purpose. If you want to extent the inode,
194 * make a new item type
196 struct btrfs_inode_item
{
208 struct btrfs_inode_timespec atime
;
209 struct btrfs_inode_timespec ctime
;
210 struct btrfs_inode_timespec mtime
;
211 struct btrfs_inode_timespec otime
;
212 } __attribute__ ((__packed__
));
214 /* inline data is just a blob of bytes */
215 struct btrfs_inline_data_item
{
217 } __attribute__ ((__packed__
));
219 struct btrfs_dir_item
{
220 struct btrfs_disk_key location
;
224 } __attribute__ ((__packed__
));
226 struct btrfs_root_item
{
227 struct btrfs_inode_item inode
;
234 struct btrfs_disk_key drop_progress
;
237 } __attribute__ ((__packed__
));
239 #define BTRFS_FILE_EXTENT_REG 0
240 #define BTRFS_FILE_EXTENT_INLINE 1
242 struct btrfs_file_extent_item
{
246 * disk space consumed by the extent, checksum blocks are included
250 __le64 disk_num_bytes
;
252 * the logical offset in file blocks (no csums)
253 * this extent record is for. This allows a file extent to point
254 * into the middle of an existing extent on disk, sharing it
255 * between two snapshots (useful if some bytes in the middle of the
256 * extent have changed
260 * the logical number of file blocks (no csums included)
263 } __attribute__ ((__packed__
));
265 struct btrfs_csum_item
{
266 u8 csum
[BTRFS_CSUM_SIZE
];
267 } __attribute__ ((__packed__
));
269 /* tag for the radix tree of block groups in ram */
270 #define BTRFS_BLOCK_GROUP_DIRTY 0
271 #define BTRFS_BLOCK_GROUP_SIZE (256 * 1024 * 1024)
274 #define BTRFS_BLOCK_GROUP_DATA 1
275 struct btrfs_block_group_item
{
278 } __attribute__ ((__packed__
));
280 struct btrfs_block_group_cache
{
281 struct cache_extent cache
;
282 struct btrfs_key key
;
283 struct btrfs_block_group_item item
;
287 struct btrfs_fs_info
{
288 struct btrfs_root
*fs_root
;
289 struct btrfs_root
*extent_root
;
290 struct btrfs_root
*tree_root
;
291 struct btrfs_key last_insert
;
292 struct cache_tree extent_cache
;
293 struct cache_tree block_group_cache
;
294 struct cache_tree pending_tree
;
295 struct cache_tree pinned_tree
;
296 struct cache_tree del_pending
;
297 struct list_head trans
;
298 struct list_head cache
;
299 u64 last_inode_alloc
;
300 u64 last_inode_alloc_dirid
;
304 struct btrfs_trans_handle
*running_transaction
;
305 struct btrfs_super_block
*disk_super
;
309 * in ram representation of the tree. extent_root is used for all allocations
310 * and for the extent tree extent_root root.
313 struct btrfs_buffer
*node
;
314 struct btrfs_buffer
*commit_root
;
315 struct btrfs_root_item root_item
;
316 struct btrfs_key root_key
;
317 struct btrfs_fs_info
*fs_info
;
319 /* data allocations are done in sectorsize units */
322 /* node allocations are done in nodesize units */
325 /* leaf allocations are done in leafsize units */
328 /* leaf allocations are done in leafsize units */
335 /* the lower bits in the key flags defines the item type */
336 #define BTRFS_KEY_TYPE_MAX 256
337 #define BTRFS_KEY_TYPE_SHIFT 24
338 #define BTRFS_KEY_TYPE_MASK (((u32)BTRFS_KEY_TYPE_MAX - 1) << \
339 BTRFS_KEY_TYPE_SHIFT)
342 * inode items have the data typically returned from stat and store other
343 * info about object characteristics. There is one for every file and dir in
346 #define BTRFS_INODE_ITEM_KEY 1
347 #define BTRFS_XATTR_ITEM_KEY 2
349 /* reserve 3-15 close to the inode for later flexibility */
352 * dir items are the name -> inode pointers in a directory. There is one
353 * for every name in a directory.
355 #define BTRFS_DIR_ITEM_KEY 16
356 #define BTRFS_DIR_INDEX_KEY 17
358 * extent data is for file data
360 #define BTRFS_EXTENT_DATA_KEY 18
362 * csum items have the checksums for data in the extents
364 #define BTRFS_CSUM_ITEM_KEY 19
366 /* reserve 20-31 for other file stuff */
369 * root items point to tree roots. There are typically in the root
370 * tree used by the super block to find all the other trees
372 #define BTRFS_ROOT_ITEM_KEY 32
374 * extent items are in the extent map tree. These record which blocks
375 * are used, and how many references there are to each block
377 #define BTRFS_EXTENT_ITEM_KEY 33
380 * block groups give us hints into the extent allocation trees. Which
381 * blocks are free etc etc
383 #define BTRFS_BLOCK_GROUP_ITEM_KEY 34
386 * string items are for debugging. They just store a short string of
389 #define BTRFS_STRING_ITEM_KEY 253
392 static inline u64
btrfs_block_group_used(struct btrfs_block_group_item
*bi
)
394 return le64_to_cpu(bi
->used
);
397 static inline void btrfs_set_block_group_used(struct
398 btrfs_block_group_item
*bi
,
401 bi
->used
= cpu_to_le64(val
);
404 static inline u64
btrfs_inode_generation(struct btrfs_inode_item
*i
)
406 return le64_to_cpu(i
->generation
);
409 static inline void btrfs_set_inode_generation(struct btrfs_inode_item
*i
,
412 i
->generation
= cpu_to_le64(val
);
415 static inline u64
btrfs_inode_size(struct btrfs_inode_item
*i
)
417 return le64_to_cpu(i
->size
);
420 static inline void btrfs_set_inode_size(struct btrfs_inode_item
*i
, u64 val
)
422 i
->size
= cpu_to_le64(val
);
425 static inline u64
btrfs_inode_nblocks(struct btrfs_inode_item
*i
)
427 return le64_to_cpu(i
->nblocks
);
430 static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item
*i
, u64 val
)
432 i
->nblocks
= cpu_to_le64(val
);
435 static inline u64
btrfs_inode_block_group(struct btrfs_inode_item
*i
)
437 return le64_to_cpu(i
->block_group
);
440 static inline void btrfs_set_inode_block_group(struct btrfs_inode_item
*i
,
443 i
->block_group
= cpu_to_le64(val
);
446 static inline u32
btrfs_inode_nlink(struct btrfs_inode_item
*i
)
448 return le32_to_cpu(i
->nlink
);
451 static inline void btrfs_set_inode_nlink(struct btrfs_inode_item
*i
, u32 val
)
453 i
->nlink
= cpu_to_le32(val
);
456 static inline u32
btrfs_inode_uid(struct btrfs_inode_item
*i
)
458 return le32_to_cpu(i
->uid
);
461 static inline void btrfs_set_inode_uid(struct btrfs_inode_item
*i
, u32 val
)
463 i
->uid
= cpu_to_le32(val
);
466 static inline u32
btrfs_inode_gid(struct btrfs_inode_item
*i
)
468 return le32_to_cpu(i
->gid
);
471 static inline void btrfs_set_inode_gid(struct btrfs_inode_item
*i
, u32 val
)
473 i
->gid
= cpu_to_le32(val
);
476 static inline u32
btrfs_inode_mode(struct btrfs_inode_item
*i
)
478 return le32_to_cpu(i
->mode
);
481 static inline void btrfs_set_inode_mode(struct btrfs_inode_item
*i
, u32 val
)
483 i
->mode
= cpu_to_le32(val
);
486 static inline u32
btrfs_inode_rdev(struct btrfs_inode_item
*i
)
488 return le32_to_cpu(i
->rdev
);
491 static inline void btrfs_set_inode_rdev(struct btrfs_inode_item
*i
, u32 val
)
493 i
->rdev
= cpu_to_le32(val
);
496 static inline u16
btrfs_inode_flags(struct btrfs_inode_item
*i
)
498 return le16_to_cpu(i
->flags
);
501 static inline void btrfs_set_inode_flags(struct btrfs_inode_item
*i
, u16 val
)
503 i
->flags
= cpu_to_le16(val
);
506 static inline u16
btrfs_inode_compat_flags(struct btrfs_inode_item
*i
)
508 return le16_to_cpu(i
->compat_flags
);
511 static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item
*i
,
514 i
->compat_flags
= cpu_to_le16(val
);
517 static inline u64
btrfs_timespec_sec(struct btrfs_inode_timespec
*ts
)
519 return le64_to_cpu(ts
->sec
);
522 static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec
*ts
,
525 ts
->sec
= cpu_to_le64(val
);
528 static inline u32
btrfs_timespec_nsec(struct btrfs_inode_timespec
*ts
)
530 return le32_to_cpu(ts
->nsec
);
533 static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec
*ts
,
536 ts
->nsec
= cpu_to_le32(val
);
539 static inline u32
btrfs_extent_refs(struct btrfs_extent_item
*ei
)
541 return le32_to_cpu(ei
->refs
);
544 static inline void btrfs_set_extent_refs(struct btrfs_extent_item
*ei
, u32 val
)
546 ei
->refs
= cpu_to_le32(val
);
549 static inline u64
btrfs_extent_owner(struct btrfs_extent_item
*ei
)
551 return le64_to_cpu(ei
->owner
);
554 static inline void btrfs_set_extent_owner(struct btrfs_extent_item
*ei
, u64 val
)
556 ei
->owner
= cpu_to_le64(val
);
559 static inline u64
btrfs_node_blockptr(struct btrfs_node
*n
, int nr
)
561 return le64_to_cpu(n
->ptrs
[nr
].blockptr
);
565 static inline void btrfs_set_node_blockptr(struct btrfs_node
*n
, int nr
,
568 n
->ptrs
[nr
].blockptr
= cpu_to_le64(val
);
571 static inline u32
btrfs_item_offset(struct btrfs_item
*item
)
573 return le32_to_cpu(item
->offset
);
576 static inline void btrfs_set_item_offset(struct btrfs_item
*item
, u32 val
)
578 item
->offset
= cpu_to_le32(val
);
581 static inline u32
btrfs_item_end(struct btrfs_item
*item
)
583 return le32_to_cpu(item
->offset
) + le32_to_cpu(item
->size
);
586 static inline u32
btrfs_item_size(struct btrfs_item
*item
)
588 return le32_to_cpu(item
->size
);
591 static inline void btrfs_set_item_size(struct btrfs_item
*item
, u32 val
)
593 item
->size
= cpu_to_le32(val
);
596 static inline u8
btrfs_dir_type(struct btrfs_dir_item
*d
)
601 static inline void btrfs_set_dir_type(struct btrfs_dir_item
*d
, u8 val
)
606 static inline u16
btrfs_dir_name_len(struct btrfs_dir_item
*d
)
608 return le16_to_cpu(d
->name_len
);
611 static inline void btrfs_set_dir_name_len(struct btrfs_dir_item
*d
, u16 val
)
613 d
->name_len
= cpu_to_le16(val
);
616 static inline u16
btrfs_dir_data_len(struct btrfs_dir_item
*d
)
618 return le16_to_cpu(d
->data_len
);
621 static inline void btrfs_set_dir_data_len(struct btrfs_dir_item
*d
, u16 val
)
623 d
->data_len
= cpu_to_le16(val
);
626 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
627 struct btrfs_disk_key
*disk
)
629 cpu
->offset
= le64_to_cpu(disk
->offset
);
630 cpu
->type
= le32_to_cpu(disk
->type
);
631 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
634 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
635 struct btrfs_key
*cpu
)
637 disk
->offset
= cpu_to_le64(cpu
->offset
);
638 disk
->type
= cpu_to_le32(cpu
->type
);
639 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
642 static inline u64
btrfs_disk_key_objectid(struct btrfs_disk_key
*disk
)
644 return le64_to_cpu(disk
->objectid
);
647 static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key
*disk
,
650 disk
->objectid
= cpu_to_le64(val
);
653 static inline u64
btrfs_disk_key_offset(struct btrfs_disk_key
*disk
)
655 return le64_to_cpu(disk
->offset
);
658 static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key
*disk
,
661 disk
->offset
= cpu_to_le64(val
);
664 static inline u8
btrfs_disk_key_type(struct btrfs_disk_key
*key
)
669 static inline void btrfs_set_disk_key_type(struct btrfs_disk_key
*key
, u8 val
)
674 static inline u32
btrfs_key_type(struct btrfs_key
*key
)
679 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u32 val
)
684 static inline u64
btrfs_header_bytenr(struct btrfs_header
*h
)
686 return le64_to_cpu(h
->bytenr
);
689 static inline void btrfs_set_header_bytenr(struct btrfs_header
*h
, u64 bytenr
)
691 h
->bytenr
= cpu_to_le64(bytenr
);
694 static inline u64
btrfs_header_generation(struct btrfs_header
*h
)
696 return le64_to_cpu(h
->generation
);
699 static inline void btrfs_set_header_generation(struct btrfs_header
*h
,
702 h
->generation
= cpu_to_le64(val
);
705 static inline u64
btrfs_header_owner(struct btrfs_header
*h
)
707 return le64_to_cpu(h
->owner
);
710 static inline void btrfs_set_header_owner(struct btrfs_header
*h
,
713 h
->owner
= cpu_to_le64(val
);
716 static inline u32
btrfs_header_nritems(struct btrfs_header
*h
)
718 return le32_to_cpu(h
->nritems
);
721 static inline void btrfs_set_header_nritems(struct btrfs_header
*h
, u32 val
)
723 h
->nritems
= cpu_to_le32(val
);
726 static inline u16
btrfs_header_flags(struct btrfs_header
*h
)
728 return le16_to_cpu(h
->flags
);
731 static inline void btrfs_set_header_flags(struct btrfs_header
*h
, u16 val
)
733 h
->flags
= cpu_to_le16(val
);
736 static inline int btrfs_header_level(struct btrfs_header
*h
)
741 static inline void btrfs_set_header_level(struct btrfs_header
*h
, int level
)
743 BUG_ON(level
> BTRFS_MAX_LEVEL
);
747 static inline int btrfs_is_leaf(struct btrfs_node
*n
)
749 return (btrfs_header_level(&n
->header
) == 0);
752 static inline u64
btrfs_root_bytenr(struct btrfs_root_item
*item
)
754 return le64_to_cpu(item
->bytenr
);
757 static inline void btrfs_set_root_bytenr(struct btrfs_root_item
*item
, u64 val
)
759 item
->bytenr
= cpu_to_le64(val
);
762 static inline u8
btrfs_root_level(struct btrfs_root_item
*item
)
767 static inline void btrfs_set_root_level(struct btrfs_root_item
*item
, u8 val
)
772 static inline u64
btrfs_root_dirid(struct btrfs_root_item
*item
)
774 return le64_to_cpu(item
->root_dirid
);
777 static inline void btrfs_set_root_dirid(struct btrfs_root_item
*item
, u64 val
)
779 item
->root_dirid
= cpu_to_le64(val
);
782 static inline u32
btrfs_root_refs(struct btrfs_root_item
*item
)
784 return le32_to_cpu(item
->refs
);
787 static inline void btrfs_set_root_refs(struct btrfs_root_item
*item
, u32 val
)
789 item
->refs
= cpu_to_le32(val
);
792 static inline u32
btrfs_root_flags(struct btrfs_root_item
*item
)
794 return le32_to_cpu(item
->flags
);
797 static inline void btrfs_set_root_flags(struct btrfs_root_item
*item
, u32 val
)
799 item
->flags
= cpu_to_le32(val
);
802 static inline void btrfs_set_root_bytes_used(struct btrfs_root_item
*item
,
805 item
->bytes_used
= cpu_to_le64(val
);
808 static inline u64
btrfs_root_bytes_used(struct btrfs_root_item
*item
)
810 return le64_to_cpu(item
->bytes_used
);
813 static inline u64
btrfs_super_bytenr(struct btrfs_super_block
*s
)
815 return le64_to_cpu(s
->bytenr
);
818 static inline void btrfs_set_super_bytenr(struct btrfs_super_block
*s
, u64 val
)
820 s
->bytenr
= cpu_to_le64(val
);
823 static inline u64
btrfs_super_generation(struct btrfs_super_block
*s
)
825 return le64_to_cpu(s
->generation
);
828 static inline void btrfs_set_super_generation(struct btrfs_super_block
*s
,
831 s
->generation
= cpu_to_le64(val
);
834 static inline u8
btrfs_super_root_level(struct btrfs_super_block
*s
)
836 return s
->root_level
;
839 static inline void btrfs_set_super_root_level(struct btrfs_super_block
*s
,
845 static inline u64
btrfs_super_root(struct btrfs_super_block
*s
)
847 return le64_to_cpu(s
->root
);
850 static inline void btrfs_set_super_root(struct btrfs_super_block
*s
, u64 val
)
852 s
->root
= cpu_to_le64(val
);
855 static inline u64
btrfs_super_total_bytes(struct btrfs_super_block
*s
)
857 return le64_to_cpu(s
->total_bytes
);
860 static inline void btrfs_set_super_total_bytes(struct btrfs_super_block
*s
,
863 s
->total_bytes
= cpu_to_le64(val
);
866 static inline u64
btrfs_super_bytes_used(struct btrfs_super_block
*s
)
868 return le64_to_cpu(s
->bytes_used
);
871 static inline void btrfs_set_super_bytes_used(struct btrfs_super_block
*s
,
874 s
->bytes_used
= cpu_to_le64(val
);
877 static inline u32
btrfs_super_sectorsize(struct btrfs_super_block
*s
)
879 return le32_to_cpu(s
->sectorsize
);
882 static inline void btrfs_set_super_sectorsize(struct btrfs_super_block
*s
,
885 s
->sectorsize
= cpu_to_le32(val
);
888 static inline u32
btrfs_super_nodesize(struct btrfs_super_block
*s
)
890 return le32_to_cpu(s
->nodesize
);
893 static inline void btrfs_set_super_nodesize(struct btrfs_super_block
*s
,
896 s
->nodesize
= cpu_to_le32(val
);
899 static inline u32
btrfs_super_leafsize(struct btrfs_super_block
*s
)
901 return le32_to_cpu(s
->leafsize
);
904 static inline void btrfs_set_super_leafsize(struct btrfs_super_block
*s
,
907 s
->leafsize
= cpu_to_le32(val
);
910 static inline u32
btrfs_super_stripesize(struct btrfs_super_block
*s
)
912 return le32_to_cpu(s
->stripesize
);
915 static inline void btrfs_set_super_stripesize(struct btrfs_super_block
*s
,
918 s
->stripesize
= cpu_to_le32(val
);
921 static inline u64
btrfs_super_root_dir(struct btrfs_super_block
*s
)
923 return le64_to_cpu(s
->root_dir_objectid
);
926 static inline void btrfs_set_super_root_dir(struct btrfs_super_block
*s
, u64
929 s
->root_dir_objectid
= cpu_to_le64(val
);
932 static inline u8
*btrfs_leaf_data(struct btrfs_leaf
*l
)
934 return (u8
*)l
->items
;
937 static inline int btrfs_file_extent_type(struct btrfs_file_extent_item
*e
)
941 static inline void btrfs_set_file_extent_type(struct btrfs_file_extent_item
*e
,
947 static inline char *btrfs_file_extent_inline_start(struct
948 btrfs_file_extent_item
*e
)
950 return (char *)(&e
->disk_bytenr
);
953 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
955 return (unsigned long)(&((struct
956 btrfs_file_extent_item
*)NULL
)->disk_bytenr
) + datasize
;
959 static inline u32
btrfs_file_extent_inline_len(struct btrfs_item
*e
)
961 struct btrfs_file_extent_item
*fe
= NULL
;
962 return btrfs_item_size(e
) - (unsigned long)(&fe
->disk_bytenr
);
965 static inline u64
btrfs_file_extent_disk_bytenr(struct btrfs_file_extent_item
968 return le64_to_cpu(e
->disk_bytenr
);
971 static inline void btrfs_set_file_extent_disk_bytenr(struct
972 btrfs_file_extent_item
975 e
->disk_bytenr
= cpu_to_le64(val
);
978 static inline u64
btrfs_file_extent_generation(struct btrfs_file_extent_item
*e
)
980 return le64_to_cpu(e
->generation
);
983 static inline void btrfs_set_file_extent_generation(struct
984 btrfs_file_extent_item
*e
,
987 e
->generation
= cpu_to_le64(val
);
990 static inline u64
btrfs_file_extent_disk_num_bytes(struct
991 btrfs_file_extent_item
*e
)
993 return le64_to_cpu(e
->disk_num_bytes
);
996 static inline void btrfs_set_file_extent_disk_num_bytes(struct
997 btrfs_file_extent_item
1000 e
->disk_num_bytes
= cpu_to_le64(val
);
1003 static inline u64
btrfs_file_extent_offset(struct btrfs_file_extent_item
*e
)
1005 return le64_to_cpu(e
->offset
);
1008 static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item
1011 e
->offset
= cpu_to_le64(val
);
1014 static inline u64
btrfs_file_extent_num_bytes(struct btrfs_file_extent_item
1017 return le64_to_cpu(e
->num_bytes
);
1020 static inline void btrfs_set_file_extent_num_bytes(struct
1021 btrfs_file_extent_item
*e
,
1024 e
->num_bytes
= cpu_to_le64(val
);
1027 /* helper function to cast into the data area of the leaf. */
1028 #define btrfs_item_ptr(leaf, slot, type) \
1029 ((type *)(btrfs_leaf_data(leaf) + \
1030 btrfs_item_offset((leaf)->items + (slot))))
1032 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
1035 return root
->leafsize
;
1036 return root
->nodesize
;
1038 int btrfs_comp_keys(struct btrfs_disk_key
*disk
, struct btrfs_key
*k2
);
1039 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1040 *root
, struct btrfs_path
*path
, u32 data_size
);
1041 struct btrfs_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1042 struct btrfs_root
*root
,
1044 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1045 struct btrfs_buffer
*buf
);
1046 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1047 *root
, u64 bytenr
, u64 num_bytes
, int pin
);
1048 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1049 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1051 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1052 void btrfs_init_path(struct btrfs_path
*p
);
1053 int btrfs_del_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1054 struct btrfs_path
*path
);
1055 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1056 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1057 int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1058 *root
, struct btrfs_path
*path
, struct btrfs_key
1059 *cpu_key
, u32 data_size
);
1060 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1061 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct btrfs_leaf
*leaf
);
1062 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1063 *root
, struct btrfs_buffer
*snap
);
1064 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
, struct
1066 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1067 struct btrfs_key
*key
);
1068 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1069 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1071 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1072 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1074 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1075 btrfs_root_item
*item
, struct btrfs_key
*key
);
1076 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1077 *root
, char *name
, int name_len
, u64 dir
,
1078 struct btrfs_key
*location
, u8 type
);
1079 int btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1080 *root
, struct btrfs_path
*path
, u64 dir
, char *name
,
1081 int name_len
, int mod
);
1082 int btrfs_match_dir_item_name(struct btrfs_root
*root
, struct btrfs_path
*path
,
1083 char *name
, int name_len
);
1084 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1085 struct btrfs_root
*fs_root
,
1086 u64 dirid
, u64
*objectid
);
1087 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1088 *root
, u64 objectid
, struct btrfs_inode_item
1090 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1091 *root
, struct btrfs_path
*path
, u64 objectid
, int mod
);
1092 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1093 struct btrfs_root
*root
);
1094 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1095 int btrfs_read_block_groups(struct btrfs_root
*root
);
1096 int btrfs_insert_block_group(struct btrfs_trans_handle
*trans
,
1097 struct btrfs_root
*root
,
1098 struct btrfs_key
*key
,
1099 struct btrfs_block_group_item
*bi
);