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
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 */
64 } __attribute__ ((__packed__
));
66 #define BTRFS_MAX_LEVEL 8
67 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \
68 sizeof(struct btrfs_header)) / \
69 (sizeof(struct btrfs_disk_key) + sizeof(u64)))
70 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
71 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize))
75 * the super block basically lists the main trees of the FS
76 * it currently lacks any block count etc etc
78 struct btrfs_super_block
{
79 u8 csum
[BTRFS_CSUM_SIZE
];
80 /* the first 3 fields must match struct btrfs_header */
81 u8 fsid
[16]; /* FS specific uuid */
82 __le64 blocknr
; /* this block number */
89 __le64 root_dir_objectid
;
90 __le64 last_device_id
;
91 /* fields below here vary with the underlying disk */
92 __le64 device_block_start
;
93 __le64 device_num_blocks
;
96 } __attribute__ ((__packed__
));
99 * A leaf is full of items. offset and size tell us where to find
100 * the item in the leaf (relative to the start of the data area)
103 struct btrfs_disk_key key
;
106 } __attribute__ ((__packed__
));
109 * leaves have an item area and a data area:
110 * [item0, item1....itemN] [free space] [dataN...data1, data0]
112 * The data is separate from the items to get the keys closer together
116 struct btrfs_header header
;
117 struct btrfs_item items
[];
118 } __attribute__ ((__packed__
));
121 * all non-leaf blocks are nodes, they hold only keys and pointers to
124 struct btrfs_key_ptr
{
125 struct btrfs_disk_key key
;
127 } __attribute__ ((__packed__
));
130 struct btrfs_header header
;
131 struct btrfs_key_ptr ptrs
[];
132 } __attribute__ ((__packed__
));
135 * btrfs_paths remember the path taken from the root down to the leaf.
136 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
137 * to any other levels that are present.
139 * The slots array records the index of the item or block pointer
140 * used while walking the tree.
143 struct btrfs_buffer
*nodes
[BTRFS_MAX_LEVEL
];
144 int slots
[BTRFS_MAX_LEVEL
];
148 * items in the extent btree are used to record the objectid of the
149 * owner of the block and the number of references
151 struct btrfs_extent_item
{
153 } __attribute__ ((__packed__
));
155 struct btrfs_inode_timespec
{
158 } __attribute__ ((__packed__
));
161 * there is no padding here on purpose. If you want to extent the inode,
162 * make a new item type
164 struct btrfs_inode_item
{
175 struct btrfs_inode_timespec atime
;
176 struct btrfs_inode_timespec ctime
;
177 struct btrfs_inode_timespec mtime
;
178 struct btrfs_inode_timespec otime
;
179 } __attribute__ ((__packed__
));
181 /* inline data is just a blob of bytes */
182 struct btrfs_inline_data_item
{
184 } __attribute__ ((__packed__
));
186 struct btrfs_dir_item
{
187 struct btrfs_disk_key location
;
191 } __attribute__ ((__packed__
));
193 struct btrfs_root_item
{
194 struct btrfs_inode_item inode
;
201 } __attribute__ ((__packed__
));
203 #define BTRFS_FILE_EXTENT_REG 0
204 #define BTRFS_FILE_EXTENT_INLINE 1
206 struct btrfs_file_extent_item
{
210 * disk space consumed by the extent, checksum blocks are included
214 __le64 disk_num_blocks
;
216 * the logical offset in file blocks (no csums)
217 * this extent record is for. This allows a file extent to point
218 * into the middle of an existing extent on disk, sharing it
219 * between two snapshots (useful if some bytes in the middle of the
220 * extent have changed
224 * the logical number of file blocks (no csums included)
227 } __attribute__ ((__packed__
));
229 struct btrfs_csum_item
{
230 u8 csum
[BTRFS_CSUM_SIZE
];
231 } __attribute__ ((__packed__
));
233 struct btrfs_device_item
{
236 } __attribute__ ((__packed__
));
238 struct btrfs_fs_info
{
239 struct btrfs_root
*fs_root
;
240 struct btrfs_root
*extent_root
;
241 struct btrfs_root
*tree_root
;
242 struct btrfs_root
*dev_root
;
243 struct btrfs_key current_insert
;
244 struct btrfs_key last_insert
;
245 struct radix_tree_root cache_radix
;
246 struct radix_tree_root pinned_radix
;
247 struct radix_tree_root dev_radix
;
248 struct list_head trans
;
249 struct list_head cache
;
250 u64 last_inode_alloc
;
251 u64 last_inode_alloc_dirid
;
255 struct btrfs_trans_handle
*running_transaction
;
256 struct btrfs_super_block
*disk_super
;
260 * in ram representation of the tree. extent_root is used for all allocations
261 * and for the extent tree extent_root root. current_insert is used
262 * only for the extent tree.
265 struct btrfs_buffer
*node
;
266 struct btrfs_buffer
*commit_root
;
267 struct btrfs_root_item root_item
;
268 struct btrfs_key root_key
;
269 struct btrfs_fs_info
*fs_info
;
275 /* the lower bits in the key flags defines the item type */
276 #define BTRFS_KEY_TYPE_MAX 256
277 #define BTRFS_KEY_TYPE_SHIFT 24
278 #define BTRFS_KEY_TYPE_MASK (((u32)BTRFS_KEY_TYPE_MAX - 1) << \
279 BTRFS_KEY_TYPE_SHIFT)
282 * inode items have the data typically returned from stat and store other
283 * info about object characteristics. There is one for every file and dir in
286 #define BTRFS_INODE_ITEM_KEY 1
289 * dir items are the name -> inode pointers in a directory. There is one
290 * for every name in a directory.
292 #define BTRFS_DIR_ITEM_KEY 2
293 #define BTRFS_DIR_INDEX_KEY 3
295 * inline data is file data that fits in the btree.
297 #define BTRFS_INLINE_DATA_KEY 4
299 * extent data is for data that can't fit in the btree. It points to
300 * a (hopefully) huge chunk of disk
302 #define BTRFS_EXTENT_DATA_KEY 5
304 * csum items have the checksums for data in the extents
306 #define BTRFS_CSUM_ITEM_KEY 6
309 * root items point to tree roots. There are typically in the root
310 * tree used by the super block to find all the other trees
312 #define BTRFS_ROOT_ITEM_KEY 7
314 * extent items are in the extent map tree. These record which blocks
315 * are used, and how many references there are to each block
317 #define BTRFS_EXTENT_ITEM_KEY 8
320 * dev items list the devices that make up the FS
322 #define BTRFS_DEV_ITEM_KEY 9
325 * string items are for debugging. They just store a short string of
328 #define BTRFS_STRING_ITEM_KEY 10
330 static inline u64
btrfs_inode_generation(struct btrfs_inode_item
*i
)
332 return le64_to_cpu(i
->generation
);
335 static inline void btrfs_set_inode_generation(struct btrfs_inode_item
*i
,
338 i
->generation
= cpu_to_le64(val
);
341 static inline u64
btrfs_inode_size(struct btrfs_inode_item
*i
)
343 return le64_to_cpu(i
->size
);
346 static inline void btrfs_set_inode_size(struct btrfs_inode_item
*i
, u64 val
)
348 i
->size
= cpu_to_le64(val
);
351 static inline u64
btrfs_inode_nblocks(struct btrfs_inode_item
*i
)
353 return le64_to_cpu(i
->nblocks
);
356 static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item
*i
, u64 val
)
358 i
->nblocks
= cpu_to_le64(val
);
361 static inline u32
btrfs_inode_nlink(struct btrfs_inode_item
*i
)
363 return le32_to_cpu(i
->nlink
);
366 static inline void btrfs_set_inode_nlink(struct btrfs_inode_item
*i
, u32 val
)
368 i
->nlink
= cpu_to_le32(val
);
371 static inline u32
btrfs_inode_uid(struct btrfs_inode_item
*i
)
373 return le32_to_cpu(i
->uid
);
376 static inline void btrfs_set_inode_uid(struct btrfs_inode_item
*i
, u32 val
)
378 i
->uid
= cpu_to_le32(val
);
381 static inline u32
btrfs_inode_gid(struct btrfs_inode_item
*i
)
383 return le32_to_cpu(i
->gid
);
386 static inline void btrfs_set_inode_gid(struct btrfs_inode_item
*i
, u32 val
)
388 i
->gid
= cpu_to_le32(val
);
391 static inline u32
btrfs_inode_mode(struct btrfs_inode_item
*i
)
393 return le32_to_cpu(i
->mode
);
396 static inline void btrfs_set_inode_mode(struct btrfs_inode_item
*i
, u32 val
)
398 i
->mode
= cpu_to_le32(val
);
401 static inline u32
btrfs_inode_rdev(struct btrfs_inode_item
*i
)
403 return le32_to_cpu(i
->rdev
);
406 static inline void btrfs_set_inode_rdev(struct btrfs_inode_item
*i
, u32 val
)
408 i
->rdev
= cpu_to_le32(val
);
411 static inline u16
btrfs_inode_flags(struct btrfs_inode_item
*i
)
413 return le16_to_cpu(i
->flags
);
416 static inline void btrfs_set_inode_flags(struct btrfs_inode_item
*i
, u16 val
)
418 i
->flags
= cpu_to_le16(val
);
421 static inline u16
btrfs_inode_compat_flags(struct btrfs_inode_item
*i
)
423 return le16_to_cpu(i
->compat_flags
);
426 static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item
*i
,
429 i
->compat_flags
= cpu_to_le16(val
);
432 static inline u64
btrfs_timespec_sec(struct btrfs_inode_timespec
*ts
)
434 return le64_to_cpu(ts
->sec
);
437 static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec
*ts
,
440 ts
->sec
= cpu_to_le64(val
);
443 static inline u32
btrfs_timespec_nsec(struct btrfs_inode_timespec
*ts
)
445 return le32_to_cpu(ts
->nsec
);
448 static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec
*ts
,
451 ts
->nsec
= cpu_to_le32(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 u16
btrfs_dir_flags(struct btrfs_dir_item
*d
)
502 return le16_to_cpu(d
->flags
);
505 static inline void btrfs_set_dir_flags(struct btrfs_dir_item
*d
, u16 val
)
507 d
->flags
= cpu_to_le16(val
);
510 static inline u8
btrfs_dir_type(struct btrfs_dir_item
*d
)
515 static inline void btrfs_set_dir_type(struct btrfs_dir_item
*d
, u8 val
)
520 static inline u16
btrfs_dir_name_len(struct btrfs_dir_item
*d
)
522 return le16_to_cpu(d
->name_len
);
525 static inline void btrfs_set_dir_name_len(struct btrfs_dir_item
*d
, u16 val
)
527 d
->name_len
= cpu_to_le16(val
);
530 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
531 struct btrfs_disk_key
*disk
)
533 cpu
->offset
= le64_to_cpu(disk
->offset
);
534 cpu
->flags
= le32_to_cpu(disk
->flags
);
535 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
538 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
539 struct btrfs_key
*cpu
)
541 disk
->offset
= cpu_to_le64(cpu
->offset
);
542 disk
->flags
= cpu_to_le32(cpu
->flags
);
543 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
546 static inline u64
btrfs_disk_key_objectid(struct btrfs_disk_key
*disk
)
548 return le64_to_cpu(disk
->objectid
);
551 static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key
*disk
,
554 disk
->objectid
= cpu_to_le64(val
);
557 static inline u64
btrfs_disk_key_offset(struct btrfs_disk_key
*disk
)
559 return le64_to_cpu(disk
->offset
);
562 static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key
*disk
,
565 disk
->offset
= cpu_to_le64(val
);
568 static inline u32
btrfs_disk_key_flags(struct btrfs_disk_key
*disk
)
570 return le32_to_cpu(disk
->flags
);
573 static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key
*disk
,
576 disk
->flags
= cpu_to_le32(val
);
579 static inline u32
btrfs_disk_key_type(struct btrfs_disk_key
*key
)
581 return le32_to_cpu(key
->flags
) >> BTRFS_KEY_TYPE_SHIFT
;
584 static inline void btrfs_set_disk_key_type(struct btrfs_disk_key
*key
,
587 u32 flags
= btrfs_disk_key_flags(key
);
588 BUG_ON(val
>= BTRFS_KEY_TYPE_MAX
);
589 val
= val
<< BTRFS_KEY_TYPE_SHIFT
;
590 flags
= (flags
& ~BTRFS_KEY_TYPE_MASK
) | val
;
591 btrfs_set_disk_key_flags(key
, flags
);
594 static inline u32
btrfs_key_type(struct btrfs_key
*key
)
596 return key
->flags
>> BTRFS_KEY_TYPE_SHIFT
;
599 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u32 val
)
601 BUG_ON(val
>= BTRFS_KEY_TYPE_MAX
);
602 val
= val
<< BTRFS_KEY_TYPE_SHIFT
;
603 key
->flags
= (key
->flags
& ~(BTRFS_KEY_TYPE_MASK
)) | val
;
606 static inline u64
btrfs_header_blocknr(struct btrfs_header
*h
)
608 return le64_to_cpu(h
->blocknr
);
611 static inline void btrfs_set_header_blocknr(struct btrfs_header
*h
, u64 blocknr
)
613 h
->blocknr
= cpu_to_le64(blocknr
);
616 static inline u64
btrfs_header_generation(struct btrfs_header
*h
)
618 return le64_to_cpu(h
->generation
);
621 static inline void btrfs_set_header_generation(struct btrfs_header
*h
,
624 h
->generation
= cpu_to_le64(val
);
627 static inline u16
btrfs_header_nritems(struct btrfs_header
*h
)
629 return le16_to_cpu(h
->nritems
);
632 static inline void btrfs_set_header_nritems(struct btrfs_header
*h
, u16 val
)
634 h
->nritems
= cpu_to_le16(val
);
637 static inline u16
btrfs_header_flags(struct btrfs_header
*h
)
639 return le16_to_cpu(h
->flags
);
642 static inline void btrfs_set_header_flags(struct btrfs_header
*h
, u16 val
)
644 h
->flags
= cpu_to_le16(val
);
647 static inline int btrfs_header_level(struct btrfs_header
*h
)
652 static inline void btrfs_set_header_level(struct btrfs_header
*h
, int level
)
654 BUG_ON(level
> BTRFS_MAX_LEVEL
);
658 static inline int btrfs_is_leaf(struct btrfs_node
*n
)
660 return (btrfs_header_level(&n
->header
) == 0);
663 static inline u64
btrfs_root_blocknr(struct btrfs_root_item
*item
)
665 return le64_to_cpu(item
->blocknr
);
668 static inline void btrfs_set_root_blocknr(struct btrfs_root_item
*item
, u64 val
)
670 item
->blocknr
= cpu_to_le64(val
);
673 static inline u64
btrfs_root_dirid(struct btrfs_root_item
*item
)
675 return le64_to_cpu(item
->root_dirid
);
678 static inline void btrfs_set_root_dirid(struct btrfs_root_item
*item
, u64 val
)
680 item
->root_dirid
= cpu_to_le64(val
);
683 static inline u32
btrfs_root_refs(struct btrfs_root_item
*item
)
685 return le32_to_cpu(item
->refs
);
688 static inline void btrfs_set_root_refs(struct btrfs_root_item
*item
, u32 val
)
690 item
->refs
= cpu_to_le32(val
);
693 static inline u64
btrfs_super_blocknr(struct btrfs_super_block
*s
)
695 return le64_to_cpu(s
->blocknr
);
698 static inline void btrfs_set_super_blocknr(struct btrfs_super_block
*s
, u64 val
)
700 s
->blocknr
= cpu_to_le64(val
);
703 static inline u64
btrfs_super_generation(struct btrfs_super_block
*s
)
705 return le64_to_cpu(s
->generation
);
708 static inline void btrfs_set_super_generation(struct btrfs_super_block
*s
,
711 s
->generation
= cpu_to_le64(val
);
714 static inline u64
btrfs_super_root(struct btrfs_super_block
*s
)
716 return le64_to_cpu(s
->root
);
719 static inline void btrfs_set_super_root(struct btrfs_super_block
*s
, u64 val
)
721 s
->root
= cpu_to_le64(val
);
724 static inline u64
btrfs_super_total_blocks(struct btrfs_super_block
*s
)
726 return le64_to_cpu(s
->total_blocks
);
729 static inline void btrfs_set_super_total_blocks(struct btrfs_super_block
*s
,
732 s
->total_blocks
= cpu_to_le64(val
);
735 static inline u64
btrfs_super_blocks_used(struct btrfs_super_block
*s
)
737 return le64_to_cpu(s
->blocks_used
);
740 static inline void btrfs_set_super_blocks_used(struct btrfs_super_block
*s
,
743 s
->blocks_used
= cpu_to_le64(val
);
746 static inline u32
btrfs_super_blocksize(struct btrfs_super_block
*s
)
748 return le32_to_cpu(s
->blocksize
);
751 static inline void btrfs_set_super_blocksize(struct btrfs_super_block
*s
,
754 s
->blocksize
= cpu_to_le32(val
);
757 static inline u64
btrfs_super_root_dir(struct btrfs_super_block
*s
)
759 return le64_to_cpu(s
->root_dir_objectid
);
762 static inline void btrfs_set_super_root_dir(struct btrfs_super_block
*s
, u64
765 s
->root_dir_objectid
= cpu_to_le64(val
);
768 static inline u64
btrfs_super_last_device_id(struct btrfs_super_block
*s
)
770 return le64_to_cpu(s
->last_device_id
);
773 static inline void btrfs_set_super_last_device_id(struct btrfs_super_block
*s
,
776 s
->last_device_id
= cpu_to_le64(val
);
779 static inline u64
btrfs_super_device_id(struct btrfs_super_block
*s
)
781 return le64_to_cpu(s
->device_id
);
784 static inline void btrfs_set_super_device_id(struct btrfs_super_block
*s
,
787 s
->device_id
= cpu_to_le64(val
);
790 static inline u64
btrfs_super_device_block_start(struct btrfs_super_block
*s
)
792 return le64_to_cpu(s
->device_block_start
);
795 static inline void btrfs_set_super_device_block_start(struct btrfs_super_block
798 s
->device_block_start
= cpu_to_le64(val
);
801 static inline u64
btrfs_super_device_num_blocks(struct btrfs_super_block
*s
)
803 return le64_to_cpu(s
->device_num_blocks
);
806 static inline void btrfs_set_super_device_num_blocks(struct btrfs_super_block
809 s
->device_num_blocks
= cpu_to_le64(val
);
812 static inline u64
btrfs_super_device_root(struct btrfs_super_block
*s
)
814 return le64_to_cpu(s
->device_root
);
817 static inline void btrfs_set_super_device_root(struct btrfs_super_block
820 s
->device_root
= cpu_to_le64(val
);
823 static inline u8
*btrfs_leaf_data(struct btrfs_leaf
*l
)
825 return (u8
*)l
->items
;
828 static inline int btrfs_file_extent_type(struct btrfs_file_extent_item
*e
)
832 static inline void btrfs_set_file_extent_type(struct btrfs_file_extent_item
*e
,
838 static inline char *btrfs_file_extent_inline_start(struct
839 btrfs_file_extent_item
*e
)
841 return (char *)(&e
->disk_blocknr
);
844 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
846 return (unsigned long)(&((struct
847 btrfs_file_extent_item
*)NULL
)->disk_blocknr
) + datasize
;
850 static inline u32
btrfs_file_extent_inline_len(struct btrfs_item
*e
)
852 struct btrfs_file_extent_item
*fe
= NULL
;
853 return btrfs_item_size(e
) - (unsigned long)(&fe
->disk_blocknr
);
856 static inline u64
btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item
859 return le64_to_cpu(e
->disk_blocknr
);
862 static inline void btrfs_set_file_extent_disk_blocknr(struct
863 btrfs_file_extent_item
866 e
->disk_blocknr
= cpu_to_le64(val
);
869 static inline u64
btrfs_file_extent_generation(struct btrfs_file_extent_item
*e
)
871 return le64_to_cpu(e
->generation
);
874 static inline void btrfs_set_file_extent_generation(struct
875 btrfs_file_extent_item
*e
,
878 e
->generation
= cpu_to_le64(val
);
881 static inline u64
btrfs_file_extent_disk_num_blocks(struct
882 btrfs_file_extent_item
*e
)
884 return le64_to_cpu(e
->disk_num_blocks
);
887 static inline void btrfs_set_file_extent_disk_num_blocks(struct
888 btrfs_file_extent_item
891 e
->disk_num_blocks
= cpu_to_le64(val
);
894 static inline u64
btrfs_file_extent_offset(struct btrfs_file_extent_item
*e
)
896 return le64_to_cpu(e
->offset
);
899 static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item
902 e
->offset
= cpu_to_le64(val
);
905 static inline u64
btrfs_file_extent_num_blocks(struct btrfs_file_extent_item
908 return le64_to_cpu(e
->num_blocks
);
911 static inline void btrfs_set_file_extent_num_blocks(struct
912 btrfs_file_extent_item
*e
,
915 e
->num_blocks
= cpu_to_le64(val
);
918 static inline u16
btrfs_device_pathlen(struct btrfs_device_item
*d
)
920 return le16_to_cpu(d
->pathlen
);
923 static inline void btrfs_set_device_pathlen(struct btrfs_device_item
*d
,
926 d
->pathlen
= cpu_to_le16(val
);
929 static inline u64
btrfs_device_id(struct btrfs_device_item
*d
)
931 return le64_to_cpu(d
->device_id
);
934 static inline void btrfs_set_device_id(struct btrfs_device_item
*d
,
937 d
->device_id
= cpu_to_le64(val
);
940 /* helper function to cast into the data area of the leaf. */
941 #define btrfs_item_ptr(leaf, slot, type) \
942 ((type *)(btrfs_leaf_data(leaf) + \
943 btrfs_item_offset((leaf)->items + (slot))))
945 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
946 *root
, struct btrfs_path
*path
, u32 data_size
);
947 struct btrfs_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
948 struct btrfs_root
*root
);
949 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
950 struct btrfs_buffer
*buf
);
951 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
952 *root
, u64 blocknr
, u64 num_blocks
, int pin
);
953 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
954 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
956 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
957 void btrfs_init_path(struct btrfs_path
*p
);
958 int btrfs_del_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
959 struct btrfs_path
*path
);
960 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
961 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
962 int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
963 *root
, struct btrfs_path
*path
, struct btrfs_key
964 *cpu_key
, u32 data_size
);
965 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
966 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct btrfs_leaf
*leaf
);
967 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
968 *root
, struct btrfs_buffer
*snap
);
969 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
, struct
971 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
972 struct btrfs_key
*key
);
973 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
974 *root
, struct btrfs_key
*key
, struct btrfs_root_item
976 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
977 *root
, struct btrfs_key
*key
, struct btrfs_root_item
979 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
980 btrfs_root_item
*item
, struct btrfs_key
*key
);
981 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
982 *root
, char *name
, int name_len
, u64 dir
,
983 struct btrfs_key
*location
, u8 type
);
984 int btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
985 *root
, struct btrfs_path
*path
, u64 dir
, char *name
,
986 int name_len
, int mod
);
987 int btrfs_match_dir_item_name(struct btrfs_root
*root
, struct btrfs_path
*path
,
988 char *name
, int name_len
);
989 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
990 struct btrfs_root
*fs_root
,
991 u64 dirid
, u64
*objectid
);
992 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
993 *root
, u64 objectid
, struct btrfs_inode_item
995 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
996 *root
, struct btrfs_path
*path
, u64 objectid
, int mod
);