5 #include "kerncompat.h"
7 struct btrfs_trans_handle
;
9 #define BTRFS_MAGIC "_BtRfS_M"
11 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
12 #define BTRFS_DEV_TREE_OBJECTID 2ULL
13 #define BTRFS_EXTENT_TREE_OBJECTID 3ULL
14 #define BTRFS_FS_TREE_OBJECTID 4ULL
15 #define BTRFS_ROOT_TREE_DIR_OBJECTID 5ULL
16 #define BTRFS_FIRST_FREE_OBJECTID 6ULL
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
27 #define BTRFS_FT_UNKNOWN 0
28 #define BTRFS_FT_REG_FILE 1
29 #define BTRFS_FT_DIR 2
30 #define BTRFS_FT_CHRDEV 3
31 #define BTRFS_FT_BLKDEV 4
32 #define BTRFS_FT_FIFO 5
33 #define BTRFS_FT_SOCK 6
34 #define BTRFS_FT_SYMLINK 7
35 #define BTRFS_FT_MAX 8
38 * the key defines the order in the tree, and so it also defines (optimal)
39 * block layout. objectid corresonds to the inode number. The flags
40 * tells us things about the object, and is a kind of stream selector.
41 * so for a given inode, keys with flags of 1 might refer to the inode
42 * data, flags of 2 may point to file data in the btree and flags == 3
43 * may point to extents.
45 * offset is the starting byte offset for this key in the stream.
47 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
48 * in cpu native order. Otherwise they are identical and their sizes
49 * should be the same (ie both packed)
51 struct btrfs_disk_key
{
55 } __attribute__ ((__packed__
));
61 } __attribute__ ((__packed__
));
64 * every tree block (leaf or node) starts with this header.
67 u8 csum
[BTRFS_CSUM_SIZE
];
68 u8 fsid
[16]; /* FS specific uuid */
69 __le64 blocknr
; /* which block this node is supposed to live in */
75 } __attribute__ ((__packed__
));
77 #define BTRFS_MAX_LEVEL 8
78 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \
79 sizeof(struct btrfs_header)) / \
80 (sizeof(struct btrfs_disk_key) + sizeof(u64)))
81 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
82 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize))
86 * the super block basically lists the main trees of the FS
87 * it currently lacks any block count etc etc
89 struct btrfs_super_block
{
90 u8 csum
[BTRFS_CSUM_SIZE
];
91 /* the first 3 fields must match struct btrfs_header */
92 u8 fsid
[16]; /* FS specific uuid */
93 __le64 blocknr
; /* this block number */
100 __le64 root_dir_objectid
;
101 __le64 last_device_id
;
102 /* fields below here vary with the underlying disk */
103 __le64 device_block_start
;
104 __le64 device_num_blocks
;
107 } __attribute__ ((__packed__
));
110 * A leaf is full of items. offset and size tell us where to find
111 * the item in the leaf (relative to the start of the data area)
114 struct btrfs_disk_key key
;
117 } __attribute__ ((__packed__
));
120 * leaves have an item area and a data area:
121 * [item0, item1....itemN] [free space] [dataN...data1, data0]
123 * The data is separate from the items to get the keys closer together
127 struct btrfs_header header
;
128 struct btrfs_item items
[];
129 } __attribute__ ((__packed__
));
132 * all non-leaf blocks are nodes, they hold only keys and pointers to
135 struct btrfs_key_ptr
{
136 struct btrfs_disk_key key
;
138 } __attribute__ ((__packed__
));
141 struct btrfs_header header
;
142 struct btrfs_key_ptr ptrs
[];
143 } __attribute__ ((__packed__
));
146 * btrfs_paths remember the path taken from the root down to the leaf.
147 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
148 * to any other levels that are present.
150 * The slots array records the index of the item or block pointer
151 * used while walking the tree.
154 struct btrfs_buffer
*nodes
[BTRFS_MAX_LEVEL
];
155 int slots
[BTRFS_MAX_LEVEL
];
159 * items in the extent btree are used to record the objectid of the
160 * owner of the block and the number of references
162 struct btrfs_extent_item
{
165 } __attribute__ ((__packed__
));
167 struct btrfs_inode_timespec
{
170 } __attribute__ ((__packed__
));
173 * there is no padding here on purpose. If you want to extent the inode,
174 * make a new item type
176 struct btrfs_inode_item
{
188 struct btrfs_inode_timespec atime
;
189 struct btrfs_inode_timespec ctime
;
190 struct btrfs_inode_timespec mtime
;
191 struct btrfs_inode_timespec otime
;
192 } __attribute__ ((__packed__
));
194 /* inline data is just a blob of bytes */
195 struct btrfs_inline_data_item
{
197 } __attribute__ ((__packed__
));
199 struct btrfs_dir_item
{
200 struct btrfs_disk_key location
;
204 } __attribute__ ((__packed__
));
206 struct btrfs_root_item
{
207 struct btrfs_inode_item inode
;
214 } __attribute__ ((__packed__
));
216 #define BTRFS_FILE_EXTENT_REG 0
217 #define BTRFS_FILE_EXTENT_INLINE 1
219 struct btrfs_file_extent_item
{
223 * disk space consumed by the extent, checksum blocks are included
227 __le64 disk_num_blocks
;
229 * the logical offset in file blocks (no csums)
230 * this extent record is for. This allows a file extent to point
231 * into the middle of an existing extent on disk, sharing it
232 * between two snapshots (useful if some bytes in the middle of the
233 * extent have changed
237 * the logical number of file blocks (no csums included)
240 } __attribute__ ((__packed__
));
242 struct btrfs_csum_item
{
243 u8 csum
[BTRFS_CSUM_SIZE
];
244 } __attribute__ ((__packed__
));
246 struct btrfs_device_item
{
249 } __attribute__ ((__packed__
));
251 /* tag for the radix tree of block groups in ram */
252 #define BTRFS_BLOCK_GROUP_DIRTY 0
253 #define BTRFS_BLOCK_GROUP_SIZE (256 * 1024 * 1024)
256 #define BTRFS_BLOCK_GROUP_DATA 1
257 struct btrfs_block_group_item
{
260 } __attribute__ ((__packed__
));
262 struct btrfs_block_group_cache
{
263 struct btrfs_key key
;
264 struct btrfs_block_group_item item
;
267 struct btrfs_fs_info
{
268 struct btrfs_root
*fs_root
;
269 struct btrfs_root
*extent_root
;
270 struct btrfs_root
*tree_root
;
271 struct btrfs_root
*dev_root
;
272 struct btrfs_key current_insert
;
273 struct btrfs_key last_insert
;
274 struct radix_tree_root cache_radix
;
275 struct radix_tree_root pinned_radix
;
276 struct radix_tree_root dev_radix
;
277 struct radix_tree_root block_group_radix
;
278 struct list_head trans
;
279 struct list_head cache
;
280 u64 last_inode_alloc
;
281 u64 last_inode_alloc_dirid
;
285 struct btrfs_trans_handle
*running_transaction
;
286 struct btrfs_super_block
*disk_super
;
290 * in ram representation of the tree. extent_root is used for all allocations
291 * and for the extent tree extent_root root. current_insert is used
292 * only for the extent tree.
295 struct btrfs_buffer
*node
;
296 struct btrfs_buffer
*commit_root
;
297 struct btrfs_root_item root_item
;
298 struct btrfs_key root_key
;
299 struct btrfs_fs_info
*fs_info
;
305 /* the lower bits in the key flags defines the item type */
306 #define BTRFS_KEY_TYPE_MAX 256
307 #define BTRFS_KEY_TYPE_SHIFT 24
308 #define BTRFS_KEY_TYPE_MASK (((u32)BTRFS_KEY_TYPE_MAX - 1) << \
309 BTRFS_KEY_TYPE_SHIFT)
312 * inode items have the data typically returned from stat and store other
313 * info about object characteristics. There is one for every file and dir in
316 #define BTRFS_INODE_ITEM_KEY 1
318 /* reserve 2-15 close to the inode for later flexibility */
321 * dir items are the name -> inode pointers in a directory. There is one
322 * for every name in a directory.
324 #define BTRFS_DIR_ITEM_KEY 16
325 #define BTRFS_DIR_INDEX_KEY 17
327 * extent data is for file data
329 #define BTRFS_EXTENT_DATA_KEY 18
331 * csum items have the checksums for data in the extents
333 #define BTRFS_CSUM_ITEM_KEY 19
335 /* reserve 20-31 for other file stuff */
338 * root items point to tree roots. There are typically in the root
339 * tree used by the super block to find all the other trees
341 #define BTRFS_ROOT_ITEM_KEY 32
343 * extent items are in the extent map tree. These record which blocks
344 * are used, and how many references there are to each block
346 #define BTRFS_EXTENT_ITEM_KEY 33
349 * block groups give us hints into the extent allocation trees. Which
350 * blocks are free etc etc
352 #define BTRFS_BLOCK_GROUP_ITEM_KEY 34
355 * dev items list the devices that make up the FS
357 #define BTRFS_DEV_ITEM_KEY 35
360 * string items are for debugging. They just store a short string of
363 #define BTRFS_STRING_ITEM_KEY 253
366 static inline u64
btrfs_block_group_used(struct btrfs_block_group_item
*bi
)
368 return le64_to_cpu(bi
->used
);
371 static inline void btrfs_set_block_group_used(struct
372 btrfs_block_group_item
*bi
,
375 bi
->used
= cpu_to_le64(val
);
378 static inline u64
btrfs_inode_generation(struct btrfs_inode_item
*i
)
380 return le64_to_cpu(i
->generation
);
383 static inline void btrfs_set_inode_generation(struct btrfs_inode_item
*i
,
386 i
->generation
= cpu_to_le64(val
);
389 static inline u64
btrfs_inode_size(struct btrfs_inode_item
*i
)
391 return le64_to_cpu(i
->size
);
394 static inline void btrfs_set_inode_size(struct btrfs_inode_item
*i
, u64 val
)
396 i
->size
= cpu_to_le64(val
);
399 static inline u64
btrfs_inode_nblocks(struct btrfs_inode_item
*i
)
401 return le64_to_cpu(i
->nblocks
);
404 static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item
*i
, u64 val
)
406 i
->nblocks
= cpu_to_le64(val
);
409 static inline u64
btrfs_inode_block_group(struct btrfs_inode_item
*i
)
411 return le64_to_cpu(i
->block_group
);
414 static inline void btrfs_set_inode_block_group(struct btrfs_inode_item
*i
,
417 i
->block_group
= cpu_to_le64(val
);
420 static inline u32
btrfs_inode_nlink(struct btrfs_inode_item
*i
)
422 return le32_to_cpu(i
->nlink
);
425 static inline void btrfs_set_inode_nlink(struct btrfs_inode_item
*i
, u32 val
)
427 i
->nlink
= cpu_to_le32(val
);
430 static inline u32
btrfs_inode_uid(struct btrfs_inode_item
*i
)
432 return le32_to_cpu(i
->uid
);
435 static inline void btrfs_set_inode_uid(struct btrfs_inode_item
*i
, u32 val
)
437 i
->uid
= cpu_to_le32(val
);
440 static inline u32
btrfs_inode_gid(struct btrfs_inode_item
*i
)
442 return le32_to_cpu(i
->gid
);
445 static inline void btrfs_set_inode_gid(struct btrfs_inode_item
*i
, u32 val
)
447 i
->gid
= cpu_to_le32(val
);
450 static inline u32
btrfs_inode_mode(struct btrfs_inode_item
*i
)
452 return le32_to_cpu(i
->mode
);
455 static inline void btrfs_set_inode_mode(struct btrfs_inode_item
*i
, u32 val
)
457 i
->mode
= cpu_to_le32(val
);
460 static inline u32
btrfs_inode_rdev(struct btrfs_inode_item
*i
)
462 return le32_to_cpu(i
->rdev
);
465 static inline void btrfs_set_inode_rdev(struct btrfs_inode_item
*i
, u32 val
)
467 i
->rdev
= cpu_to_le32(val
);
470 static inline u16
btrfs_inode_flags(struct btrfs_inode_item
*i
)
472 return le16_to_cpu(i
->flags
);
475 static inline void btrfs_set_inode_flags(struct btrfs_inode_item
*i
, u16 val
)
477 i
->flags
= cpu_to_le16(val
);
480 static inline u16
btrfs_inode_compat_flags(struct btrfs_inode_item
*i
)
482 return le16_to_cpu(i
->compat_flags
);
485 static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item
*i
,
488 i
->compat_flags
= cpu_to_le16(val
);
491 static inline u64
btrfs_timespec_sec(struct btrfs_inode_timespec
*ts
)
493 return le64_to_cpu(ts
->sec
);
496 static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec
*ts
,
499 ts
->sec
= cpu_to_le64(val
);
502 static inline u32
btrfs_timespec_nsec(struct btrfs_inode_timespec
*ts
)
504 return le32_to_cpu(ts
->nsec
);
507 static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec
*ts
,
510 ts
->nsec
= cpu_to_le32(val
);
513 static inline u32
btrfs_extent_refs(struct btrfs_extent_item
*ei
)
515 return le32_to_cpu(ei
->refs
);
518 static inline void btrfs_set_extent_refs(struct btrfs_extent_item
*ei
, u32 val
)
520 ei
->refs
= cpu_to_le32(val
);
523 static inline u64
btrfs_extent_owner(struct btrfs_extent_item
*ei
)
525 return le64_to_cpu(ei
->owner
);
528 static inline void btrfs_set_extent_owner(struct btrfs_extent_item
*ei
, u64 val
)
530 ei
->owner
= cpu_to_le64(val
);
533 static inline u64
btrfs_node_blockptr(struct btrfs_node
*n
, int nr
)
535 return le64_to_cpu(n
->ptrs
[nr
].blockptr
);
539 static inline void btrfs_set_node_blockptr(struct btrfs_node
*n
, int nr
,
542 n
->ptrs
[nr
].blockptr
= cpu_to_le64(val
);
545 static inline u32
btrfs_item_offset(struct btrfs_item
*item
)
547 return le32_to_cpu(item
->offset
);
550 static inline void btrfs_set_item_offset(struct btrfs_item
*item
, u32 val
)
552 item
->offset
= cpu_to_le32(val
);
555 static inline u32
btrfs_item_end(struct btrfs_item
*item
)
557 return le32_to_cpu(item
->offset
) + le16_to_cpu(item
->size
);
560 static inline u16
btrfs_item_size(struct btrfs_item
*item
)
562 return le16_to_cpu(item
->size
);
565 static inline void btrfs_set_item_size(struct btrfs_item
*item
, u16 val
)
567 item
->size
= cpu_to_le16(val
);
570 static inline u16
btrfs_dir_flags(struct btrfs_dir_item
*d
)
572 return le16_to_cpu(d
->flags
);
575 static inline void btrfs_set_dir_flags(struct btrfs_dir_item
*d
, u16 val
)
577 d
->flags
= cpu_to_le16(val
);
580 static inline u8
btrfs_dir_type(struct btrfs_dir_item
*d
)
585 static inline void btrfs_set_dir_type(struct btrfs_dir_item
*d
, u8 val
)
590 static inline u16
btrfs_dir_name_len(struct btrfs_dir_item
*d
)
592 return le16_to_cpu(d
->name_len
);
595 static inline void btrfs_set_dir_name_len(struct btrfs_dir_item
*d
, u16 val
)
597 d
->name_len
= cpu_to_le16(val
);
600 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
601 struct btrfs_disk_key
*disk
)
603 cpu
->offset
= le64_to_cpu(disk
->offset
);
604 cpu
->flags
= le32_to_cpu(disk
->flags
);
605 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
608 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
609 struct btrfs_key
*cpu
)
611 disk
->offset
= cpu_to_le64(cpu
->offset
);
612 disk
->flags
= cpu_to_le32(cpu
->flags
);
613 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
616 static inline u64
btrfs_disk_key_objectid(struct btrfs_disk_key
*disk
)
618 return le64_to_cpu(disk
->objectid
);
621 static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key
*disk
,
624 disk
->objectid
= cpu_to_le64(val
);
627 static inline u64
btrfs_disk_key_offset(struct btrfs_disk_key
*disk
)
629 return le64_to_cpu(disk
->offset
);
632 static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key
*disk
,
635 disk
->offset
= cpu_to_le64(val
);
638 static inline u32
btrfs_disk_key_flags(struct btrfs_disk_key
*disk
)
640 return le32_to_cpu(disk
->flags
);
643 static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key
*disk
,
646 disk
->flags
= cpu_to_le32(val
);
649 static inline u32
btrfs_disk_key_type(struct btrfs_disk_key
*key
)
651 return le32_to_cpu(key
->flags
) >> BTRFS_KEY_TYPE_SHIFT
;
654 static inline void btrfs_set_disk_key_type(struct btrfs_disk_key
*key
,
657 u32 flags
= btrfs_disk_key_flags(key
);
658 BUG_ON(val
>= BTRFS_KEY_TYPE_MAX
);
659 val
= val
<< BTRFS_KEY_TYPE_SHIFT
;
660 flags
= (flags
& ~BTRFS_KEY_TYPE_MASK
) | val
;
661 btrfs_set_disk_key_flags(key
, flags
);
664 static inline u32
btrfs_key_type(struct btrfs_key
*key
)
666 return key
->flags
>> BTRFS_KEY_TYPE_SHIFT
;
669 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u32 val
)
671 BUG_ON(val
>= BTRFS_KEY_TYPE_MAX
);
672 val
= val
<< BTRFS_KEY_TYPE_SHIFT
;
673 key
->flags
= (key
->flags
& ~(BTRFS_KEY_TYPE_MASK
)) | val
;
676 static inline u64
btrfs_header_blocknr(struct btrfs_header
*h
)
678 return le64_to_cpu(h
->blocknr
);
681 static inline void btrfs_set_header_blocknr(struct btrfs_header
*h
, u64 blocknr
)
683 h
->blocknr
= cpu_to_le64(blocknr
);
686 static inline u64
btrfs_header_generation(struct btrfs_header
*h
)
688 return le64_to_cpu(h
->generation
);
691 static inline void btrfs_set_header_generation(struct btrfs_header
*h
,
694 h
->generation
= cpu_to_le64(val
);
697 static inline u64
btrfs_header_owner(struct btrfs_header
*h
)
699 return le64_to_cpu(h
->owner
);
702 static inline void btrfs_set_header_owner(struct btrfs_header
*h
,
705 h
->owner
= cpu_to_le64(val
);
708 static inline u16
btrfs_header_nritems(struct btrfs_header
*h
)
710 return le16_to_cpu(h
->nritems
);
713 static inline void btrfs_set_header_nritems(struct btrfs_header
*h
, u16 val
)
715 h
->nritems
= cpu_to_le16(val
);
718 static inline u16
btrfs_header_flags(struct btrfs_header
*h
)
720 return le16_to_cpu(h
->flags
);
723 static inline void btrfs_set_header_flags(struct btrfs_header
*h
, u16 val
)
725 h
->flags
= cpu_to_le16(val
);
728 static inline int btrfs_header_level(struct btrfs_header
*h
)
733 static inline void btrfs_set_header_level(struct btrfs_header
*h
, int level
)
735 BUG_ON(level
> BTRFS_MAX_LEVEL
);
739 static inline int btrfs_is_leaf(struct btrfs_node
*n
)
741 return (btrfs_header_level(&n
->header
) == 0);
744 static inline u64
btrfs_root_blocknr(struct btrfs_root_item
*item
)
746 return le64_to_cpu(item
->blocknr
);
749 static inline void btrfs_set_root_blocknr(struct btrfs_root_item
*item
, u64 val
)
751 item
->blocknr
= cpu_to_le64(val
);
754 static inline u64
btrfs_root_dirid(struct btrfs_root_item
*item
)
756 return le64_to_cpu(item
->root_dirid
);
759 static inline void btrfs_set_root_dirid(struct btrfs_root_item
*item
, u64 val
)
761 item
->root_dirid
= cpu_to_le64(val
);
764 static inline u32
btrfs_root_refs(struct btrfs_root_item
*item
)
766 return le32_to_cpu(item
->refs
);
769 static inline void btrfs_set_root_refs(struct btrfs_root_item
*item
, u32 val
)
771 item
->refs
= cpu_to_le32(val
);
774 static inline u64
btrfs_super_blocknr(struct btrfs_super_block
*s
)
776 return le64_to_cpu(s
->blocknr
);
779 static inline void btrfs_set_super_blocknr(struct btrfs_super_block
*s
, u64 val
)
781 s
->blocknr
= cpu_to_le64(val
);
784 static inline u64
btrfs_super_generation(struct btrfs_super_block
*s
)
786 return le64_to_cpu(s
->generation
);
789 static inline void btrfs_set_super_generation(struct btrfs_super_block
*s
,
792 s
->generation
= cpu_to_le64(val
);
795 static inline u64
btrfs_super_root(struct btrfs_super_block
*s
)
797 return le64_to_cpu(s
->root
);
800 static inline void btrfs_set_super_root(struct btrfs_super_block
*s
, u64 val
)
802 s
->root
= cpu_to_le64(val
);
805 static inline u64
btrfs_super_total_blocks(struct btrfs_super_block
*s
)
807 return le64_to_cpu(s
->total_blocks
);
810 static inline void btrfs_set_super_total_blocks(struct btrfs_super_block
*s
,
813 s
->total_blocks
= cpu_to_le64(val
);
816 static inline u64
btrfs_super_blocks_used(struct btrfs_super_block
*s
)
818 return le64_to_cpu(s
->blocks_used
);
821 static inline void btrfs_set_super_blocks_used(struct btrfs_super_block
*s
,
824 s
->blocks_used
= cpu_to_le64(val
);
827 static inline u32
btrfs_super_blocksize(struct btrfs_super_block
*s
)
829 return le32_to_cpu(s
->blocksize
);
832 static inline void btrfs_set_super_blocksize(struct btrfs_super_block
*s
,
835 s
->blocksize
= cpu_to_le32(val
);
838 static inline u64
btrfs_super_root_dir(struct btrfs_super_block
*s
)
840 return le64_to_cpu(s
->root_dir_objectid
);
843 static inline void btrfs_set_super_root_dir(struct btrfs_super_block
*s
, u64
846 s
->root_dir_objectid
= cpu_to_le64(val
);
849 static inline u64
btrfs_super_last_device_id(struct btrfs_super_block
*s
)
851 return le64_to_cpu(s
->last_device_id
);
854 static inline void btrfs_set_super_last_device_id(struct btrfs_super_block
*s
,
857 s
->last_device_id
= cpu_to_le64(val
);
860 static inline u64
btrfs_super_device_id(struct btrfs_super_block
*s
)
862 return le64_to_cpu(s
->device_id
);
865 static inline void btrfs_set_super_device_id(struct btrfs_super_block
*s
,
868 s
->device_id
= cpu_to_le64(val
);
871 static inline u64
btrfs_super_device_block_start(struct btrfs_super_block
*s
)
873 return le64_to_cpu(s
->device_block_start
);
876 static inline void btrfs_set_super_device_block_start(struct btrfs_super_block
879 s
->device_block_start
= cpu_to_le64(val
);
882 static inline u64
btrfs_super_device_num_blocks(struct btrfs_super_block
*s
)
884 return le64_to_cpu(s
->device_num_blocks
);
887 static inline void btrfs_set_super_device_num_blocks(struct btrfs_super_block
890 s
->device_num_blocks
= cpu_to_le64(val
);
893 static inline u64
btrfs_super_device_root(struct btrfs_super_block
*s
)
895 return le64_to_cpu(s
->device_root
);
898 static inline void btrfs_set_super_device_root(struct btrfs_super_block
901 s
->device_root
= cpu_to_le64(val
);
904 static inline u8
*btrfs_leaf_data(struct btrfs_leaf
*l
)
906 return (u8
*)l
->items
;
909 static inline int btrfs_file_extent_type(struct btrfs_file_extent_item
*e
)
913 static inline void btrfs_set_file_extent_type(struct btrfs_file_extent_item
*e
,
919 static inline char *btrfs_file_extent_inline_start(struct
920 btrfs_file_extent_item
*e
)
922 return (char *)(&e
->disk_blocknr
);
925 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
927 return (unsigned long)(&((struct
928 btrfs_file_extent_item
*)NULL
)->disk_blocknr
) + datasize
;
931 static inline u32
btrfs_file_extent_inline_len(struct btrfs_item
*e
)
933 struct btrfs_file_extent_item
*fe
= NULL
;
934 return btrfs_item_size(e
) - (unsigned long)(&fe
->disk_blocknr
);
937 static inline u64
btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item
940 return le64_to_cpu(e
->disk_blocknr
);
943 static inline void btrfs_set_file_extent_disk_blocknr(struct
944 btrfs_file_extent_item
947 e
->disk_blocknr
= cpu_to_le64(val
);
950 static inline u64
btrfs_file_extent_generation(struct btrfs_file_extent_item
*e
)
952 return le64_to_cpu(e
->generation
);
955 static inline void btrfs_set_file_extent_generation(struct
956 btrfs_file_extent_item
*e
,
959 e
->generation
= cpu_to_le64(val
);
962 static inline u64
btrfs_file_extent_disk_num_blocks(struct
963 btrfs_file_extent_item
*e
)
965 return le64_to_cpu(e
->disk_num_blocks
);
968 static inline void btrfs_set_file_extent_disk_num_blocks(struct
969 btrfs_file_extent_item
972 e
->disk_num_blocks
= cpu_to_le64(val
);
975 static inline u64
btrfs_file_extent_offset(struct btrfs_file_extent_item
*e
)
977 return le64_to_cpu(e
->offset
);
980 static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item
983 e
->offset
= cpu_to_le64(val
);
986 static inline u64
btrfs_file_extent_num_blocks(struct btrfs_file_extent_item
989 return le64_to_cpu(e
->num_blocks
);
992 static inline void btrfs_set_file_extent_num_blocks(struct
993 btrfs_file_extent_item
*e
,
996 e
->num_blocks
= cpu_to_le64(val
);
999 static inline u16
btrfs_device_pathlen(struct btrfs_device_item
*d
)
1001 return le16_to_cpu(d
->pathlen
);
1004 static inline void btrfs_set_device_pathlen(struct btrfs_device_item
*d
,
1007 d
->pathlen
= cpu_to_le16(val
);
1010 static inline u64
btrfs_device_id(struct btrfs_device_item
*d
)
1012 return le64_to_cpu(d
->device_id
);
1015 static inline void btrfs_set_device_id(struct btrfs_device_item
*d
,
1018 d
->device_id
= cpu_to_le64(val
);
1021 /* helper function to cast into the data area of the leaf. */
1022 #define btrfs_item_ptr(leaf, slot, type) \
1023 ((type *)(btrfs_leaf_data(leaf) + \
1024 btrfs_item_offset((leaf)->items + (slot))))
1026 int btrfs_comp_keys(struct btrfs_disk_key
*disk
, struct btrfs_key
*k2
);
1027 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1028 *root
, struct btrfs_path
*path
, u32 data_size
);
1029 struct btrfs_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1030 struct btrfs_root
*root
);
1031 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1032 struct btrfs_buffer
*buf
);
1033 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1034 *root
, u64 blocknr
, u64 num_blocks
, int pin
);
1035 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1036 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1038 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1039 void btrfs_init_path(struct btrfs_path
*p
);
1040 int btrfs_del_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1041 struct btrfs_path
*path
);
1042 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1043 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1044 int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1045 *root
, struct btrfs_path
*path
, struct btrfs_key
1046 *cpu_key
, u32 data_size
);
1047 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1048 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct btrfs_leaf
*leaf
);
1049 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1050 *root
, struct btrfs_buffer
*snap
);
1051 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
, struct
1053 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1054 struct btrfs_key
*key
);
1055 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1056 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1058 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1059 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1061 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1062 btrfs_root_item
*item
, struct btrfs_key
*key
);
1063 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1064 *root
, char *name
, int name_len
, u64 dir
,
1065 struct btrfs_key
*location
, u8 type
);
1066 int btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1067 *root
, struct btrfs_path
*path
, u64 dir
, char *name
,
1068 int name_len
, int mod
);
1069 int btrfs_match_dir_item_name(struct btrfs_root
*root
, struct btrfs_path
*path
,
1070 char *name
, int name_len
);
1071 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1072 struct btrfs_root
*fs_root
,
1073 u64 dirid
, u64
*objectid
);
1074 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1075 *root
, u64 objectid
, struct btrfs_inode_item
1077 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1078 *root
, struct btrfs_path
*path
, u64 objectid
, int mod
);
1079 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1080 struct btrfs_root
*root
);
1081 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1082 int btrfs_read_block_groups(struct btrfs_root
*root
);
1083 int btrfs_insert_block_group(struct btrfs_trans_handle
*trans
,
1084 struct btrfs_root
*root
,
1085 struct btrfs_key
*key
,
1086 struct btrfs_block_group_item
*bi
);