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 */
65 } __attribute__ ((__packed__
));
67 #define BTRFS_MAX_LEVEL 8
68 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \
69 sizeof(struct btrfs_header)) / \
70 (sizeof(struct btrfs_disk_key) + sizeof(u64)))
71 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
72 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize))
76 * the super block basically lists the main trees of the FS
77 * it currently lacks any block count etc etc
79 struct btrfs_super_block
{
80 u8 csum
[BTRFS_CSUM_SIZE
];
81 /* the first 3 fields must match struct btrfs_header */
82 u8 fsid
[16]; /* FS specific uuid */
83 __le64 blocknr
; /* this block number */
90 __le64 root_dir_objectid
;
91 __le64 last_device_id
;
92 /* fields below here vary with the underlying disk */
93 __le64 device_block_start
;
94 __le64 device_num_blocks
;
97 } __attribute__ ((__packed__
));
100 * A leaf is full of items. offset and size tell us where to find
101 * the item in the leaf (relative to the start of the data area)
104 struct btrfs_disk_key key
;
107 } __attribute__ ((__packed__
));
110 * leaves have an item area and a data area:
111 * [item0, item1....itemN] [free space] [dataN...data1, data0]
113 * The data is separate from the items to get the keys closer together
117 struct btrfs_header header
;
118 struct btrfs_item items
[];
119 } __attribute__ ((__packed__
));
122 * all non-leaf blocks are nodes, they hold only keys and pointers to
125 struct btrfs_key_ptr
{
126 struct btrfs_disk_key key
;
128 } __attribute__ ((__packed__
));
131 struct btrfs_header header
;
132 struct btrfs_key_ptr ptrs
[];
133 } __attribute__ ((__packed__
));
136 * btrfs_paths remember the path taken from the root down to the leaf.
137 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
138 * to any other levels that are present.
140 * The slots array records the index of the item or block pointer
141 * used while walking the tree.
144 struct btrfs_buffer
*nodes
[BTRFS_MAX_LEVEL
];
145 int slots
[BTRFS_MAX_LEVEL
];
149 * items in the extent btree are used to record the objectid of the
150 * owner of the block and the number of references
152 struct btrfs_extent_item
{
155 } __attribute__ ((__packed__
));
157 struct btrfs_inode_timespec
{
160 } __attribute__ ((__packed__
));
163 * there is no padding here on purpose. If you want to extent the inode,
164 * make a new item type
166 struct btrfs_inode_item
{
178 struct btrfs_inode_timespec atime
;
179 struct btrfs_inode_timespec ctime
;
180 struct btrfs_inode_timespec mtime
;
181 struct btrfs_inode_timespec otime
;
182 } __attribute__ ((__packed__
));
184 /* inline data is just a blob of bytes */
185 struct btrfs_inline_data_item
{
187 } __attribute__ ((__packed__
));
189 struct btrfs_dir_item
{
190 struct btrfs_disk_key location
;
194 } __attribute__ ((__packed__
));
196 struct btrfs_root_item
{
197 struct btrfs_inode_item inode
;
204 } __attribute__ ((__packed__
));
206 #define BTRFS_FILE_EXTENT_REG 0
207 #define BTRFS_FILE_EXTENT_INLINE 1
209 struct btrfs_file_extent_item
{
213 * disk space consumed by the extent, checksum blocks are included
217 __le64 disk_num_blocks
;
219 * the logical offset in file blocks (no csums)
220 * this extent record is for. This allows a file extent to point
221 * into the middle of an existing extent on disk, sharing it
222 * between two snapshots (useful if some bytes in the middle of the
223 * extent have changed
227 * the logical number of file blocks (no csums included)
230 } __attribute__ ((__packed__
));
232 struct btrfs_csum_item
{
233 u8 csum
[BTRFS_CSUM_SIZE
];
234 } __attribute__ ((__packed__
));
236 struct btrfs_device_item
{
239 } __attribute__ ((__packed__
));
241 /* tag for the radix tree of block groups in ram */
242 #define BTRFS_BLOCK_GROUP_DIRTY 0
243 #define BTRFS_BLOCK_GROUP_HINTS 8
244 #define BTRFS_BLOCK_GROUP_SIZE (256 * 1024 * 1024)
245 struct btrfs_block_group_item
{
247 } __attribute__ ((__packed__
));
249 struct btrfs_block_group_cache
{
250 struct btrfs_key key
;
251 struct btrfs_block_group_item item
;
254 struct btrfs_fs_info
{
255 struct btrfs_root
*fs_root
;
256 struct btrfs_root
*extent_root
;
257 struct btrfs_root
*tree_root
;
258 struct btrfs_root
*dev_root
;
259 struct btrfs_key current_insert
;
260 struct btrfs_key last_insert
;
261 struct radix_tree_root cache_radix
;
262 struct radix_tree_root pinned_radix
;
263 struct radix_tree_root dev_radix
;
264 struct radix_tree_root block_group_radix
;
265 struct list_head trans
;
266 struct list_head cache
;
267 u64 last_inode_alloc
;
268 u64 last_inode_alloc_dirid
;
272 struct btrfs_trans_handle
*running_transaction
;
273 struct btrfs_super_block
*disk_super
;
277 * in ram representation of the tree. extent_root is used for all allocations
278 * and for the extent tree extent_root root. current_insert is used
279 * only for the extent tree.
282 struct btrfs_buffer
*node
;
283 struct btrfs_buffer
*commit_root
;
284 struct btrfs_root_item root_item
;
285 struct btrfs_key root_key
;
286 struct btrfs_fs_info
*fs_info
;
292 /* the lower bits in the key flags defines the item type */
293 #define BTRFS_KEY_TYPE_MAX 256
294 #define BTRFS_KEY_TYPE_SHIFT 24
295 #define BTRFS_KEY_TYPE_MASK (((u32)BTRFS_KEY_TYPE_MAX - 1) << \
296 BTRFS_KEY_TYPE_SHIFT)
299 * inode items have the data typically returned from stat and store other
300 * info about object characteristics. There is one for every file and dir in
303 #define BTRFS_INODE_ITEM_KEY 1
305 /* reserve 2-15 close to the inode for later flexibility */
308 * dir items are the name -> inode pointers in a directory. There is one
309 * for every name in a directory.
311 #define BTRFS_DIR_ITEM_KEY 16
312 #define BTRFS_DIR_INDEX_KEY 17
314 * extent data is for file data
316 #define BTRFS_EXTENT_DATA_KEY 18
318 * csum items have the checksums for data in the extents
320 #define BTRFS_CSUM_ITEM_KEY 19
322 /* reserve 20-31 for other file stuff */
325 * root items point to tree roots. There are typically in the root
326 * tree used by the super block to find all the other trees
328 #define BTRFS_ROOT_ITEM_KEY 32
330 * extent items are in the extent map tree. These record which blocks
331 * are used, and how many references there are to each block
333 #define BTRFS_EXTENT_ITEM_KEY 33
336 * block groups give us hints into the extent allocation trees. Which
337 * blocks are free etc etc
339 #define BTRFS_BLOCK_GROUP_ITEM_KEY 34
342 * dev items list the devices that make up the FS
344 #define BTRFS_DEV_ITEM_KEY 35
347 * string items are for debugging. They just store a short string of
350 #define BTRFS_STRING_ITEM_KEY 253
353 static inline u64
btrfs_block_group_used(struct btrfs_block_group_item
*bi
)
355 return le64_to_cpu(bi
->used
);
358 static inline void btrfs_set_block_group_used(struct
359 btrfs_block_group_item
*bi
,
362 bi
->used
= cpu_to_le64(val
);
365 static inline u64
btrfs_inode_generation(struct btrfs_inode_item
*i
)
367 return le64_to_cpu(i
->generation
);
370 static inline void btrfs_set_inode_generation(struct btrfs_inode_item
*i
,
373 i
->generation
= cpu_to_le64(val
);
376 static inline u64
btrfs_inode_size(struct btrfs_inode_item
*i
)
378 return le64_to_cpu(i
->size
);
381 static inline void btrfs_set_inode_size(struct btrfs_inode_item
*i
, u64 val
)
383 i
->size
= cpu_to_le64(val
);
386 static inline u64
btrfs_inode_nblocks(struct btrfs_inode_item
*i
)
388 return le64_to_cpu(i
->nblocks
);
391 static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item
*i
, u64 val
)
393 i
->nblocks
= cpu_to_le64(val
);
396 static inline u64
btrfs_inode_block_group(struct btrfs_inode_item
*i
)
398 return le64_to_cpu(i
->block_group
);
401 static inline void btrfs_set_inode_block_group(struct btrfs_inode_item
*i
,
404 i
->block_group
= cpu_to_le64(val
);
407 static inline u32
btrfs_inode_nlink(struct btrfs_inode_item
*i
)
409 return le32_to_cpu(i
->nlink
);
412 static inline void btrfs_set_inode_nlink(struct btrfs_inode_item
*i
, u32 val
)
414 i
->nlink
= cpu_to_le32(val
);
417 static inline u32
btrfs_inode_uid(struct btrfs_inode_item
*i
)
419 return le32_to_cpu(i
->uid
);
422 static inline void btrfs_set_inode_uid(struct btrfs_inode_item
*i
, u32 val
)
424 i
->uid
= cpu_to_le32(val
);
427 static inline u32
btrfs_inode_gid(struct btrfs_inode_item
*i
)
429 return le32_to_cpu(i
->gid
);
432 static inline void btrfs_set_inode_gid(struct btrfs_inode_item
*i
, u32 val
)
434 i
->gid
= cpu_to_le32(val
);
437 static inline u32
btrfs_inode_mode(struct btrfs_inode_item
*i
)
439 return le32_to_cpu(i
->mode
);
442 static inline void btrfs_set_inode_mode(struct btrfs_inode_item
*i
, u32 val
)
444 i
->mode
= cpu_to_le32(val
);
447 static inline u32
btrfs_inode_rdev(struct btrfs_inode_item
*i
)
449 return le32_to_cpu(i
->rdev
);
452 static inline void btrfs_set_inode_rdev(struct btrfs_inode_item
*i
, u32 val
)
454 i
->rdev
= cpu_to_le32(val
);
457 static inline u16
btrfs_inode_flags(struct btrfs_inode_item
*i
)
459 return le16_to_cpu(i
->flags
);
462 static inline void btrfs_set_inode_flags(struct btrfs_inode_item
*i
, u16 val
)
464 i
->flags
= cpu_to_le16(val
);
467 static inline u16
btrfs_inode_compat_flags(struct btrfs_inode_item
*i
)
469 return le16_to_cpu(i
->compat_flags
);
472 static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item
*i
,
475 i
->compat_flags
= cpu_to_le16(val
);
478 static inline u64
btrfs_timespec_sec(struct btrfs_inode_timespec
*ts
)
480 return le64_to_cpu(ts
->sec
);
483 static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec
*ts
,
486 ts
->sec
= cpu_to_le64(val
);
489 static inline u32
btrfs_timespec_nsec(struct btrfs_inode_timespec
*ts
)
491 return le32_to_cpu(ts
->nsec
);
494 static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec
*ts
,
497 ts
->nsec
= cpu_to_le32(val
);
500 static inline u32
btrfs_extent_refs(struct btrfs_extent_item
*ei
)
502 return le32_to_cpu(ei
->refs
);
505 static inline void btrfs_set_extent_refs(struct btrfs_extent_item
*ei
, u32 val
)
507 ei
->refs
= cpu_to_le32(val
);
510 static inline u64
btrfs_extent_owner(struct btrfs_extent_item
*ei
)
512 return le64_to_cpu(ei
->owner
);
515 static inline void btrfs_set_extent_owner(struct btrfs_extent_item
*ei
, u64 val
)
517 ei
->owner
= cpu_to_le64(val
);
520 static inline u64
btrfs_node_blockptr(struct btrfs_node
*n
, int nr
)
522 return le64_to_cpu(n
->ptrs
[nr
].blockptr
);
526 static inline void btrfs_set_node_blockptr(struct btrfs_node
*n
, int nr
,
529 n
->ptrs
[nr
].blockptr
= cpu_to_le64(val
);
532 static inline u32
btrfs_item_offset(struct btrfs_item
*item
)
534 return le32_to_cpu(item
->offset
);
537 static inline void btrfs_set_item_offset(struct btrfs_item
*item
, u32 val
)
539 item
->offset
= cpu_to_le32(val
);
542 static inline u32
btrfs_item_end(struct btrfs_item
*item
)
544 return le32_to_cpu(item
->offset
) + le16_to_cpu(item
->size
);
547 static inline u16
btrfs_item_size(struct btrfs_item
*item
)
549 return le16_to_cpu(item
->size
);
552 static inline void btrfs_set_item_size(struct btrfs_item
*item
, u16 val
)
554 item
->size
= cpu_to_le16(val
);
557 static inline u16
btrfs_dir_flags(struct btrfs_dir_item
*d
)
559 return le16_to_cpu(d
->flags
);
562 static inline void btrfs_set_dir_flags(struct btrfs_dir_item
*d
, u16 val
)
564 d
->flags
= cpu_to_le16(val
);
567 static inline u8
btrfs_dir_type(struct btrfs_dir_item
*d
)
572 static inline void btrfs_set_dir_type(struct btrfs_dir_item
*d
, u8 val
)
577 static inline u16
btrfs_dir_name_len(struct btrfs_dir_item
*d
)
579 return le16_to_cpu(d
->name_len
);
582 static inline void btrfs_set_dir_name_len(struct btrfs_dir_item
*d
, u16 val
)
584 d
->name_len
= cpu_to_le16(val
);
587 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
588 struct btrfs_disk_key
*disk
)
590 cpu
->offset
= le64_to_cpu(disk
->offset
);
591 cpu
->flags
= le32_to_cpu(disk
->flags
);
592 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
595 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
596 struct btrfs_key
*cpu
)
598 disk
->offset
= cpu_to_le64(cpu
->offset
);
599 disk
->flags
= cpu_to_le32(cpu
->flags
);
600 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
603 static inline u64
btrfs_disk_key_objectid(struct btrfs_disk_key
*disk
)
605 return le64_to_cpu(disk
->objectid
);
608 static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key
*disk
,
611 disk
->objectid
= cpu_to_le64(val
);
614 static inline u64
btrfs_disk_key_offset(struct btrfs_disk_key
*disk
)
616 return le64_to_cpu(disk
->offset
);
619 static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key
*disk
,
622 disk
->offset
= cpu_to_le64(val
);
625 static inline u32
btrfs_disk_key_flags(struct btrfs_disk_key
*disk
)
627 return le32_to_cpu(disk
->flags
);
630 static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key
*disk
,
633 disk
->flags
= cpu_to_le32(val
);
636 static inline u32
btrfs_disk_key_type(struct btrfs_disk_key
*key
)
638 return le32_to_cpu(key
->flags
) >> BTRFS_KEY_TYPE_SHIFT
;
641 static inline void btrfs_set_disk_key_type(struct btrfs_disk_key
*key
,
644 u32 flags
= btrfs_disk_key_flags(key
);
645 BUG_ON(val
>= BTRFS_KEY_TYPE_MAX
);
646 val
= val
<< BTRFS_KEY_TYPE_SHIFT
;
647 flags
= (flags
& ~BTRFS_KEY_TYPE_MASK
) | val
;
648 btrfs_set_disk_key_flags(key
, flags
);
651 static inline u32
btrfs_key_type(struct btrfs_key
*key
)
653 return key
->flags
>> BTRFS_KEY_TYPE_SHIFT
;
656 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u32 val
)
658 BUG_ON(val
>= BTRFS_KEY_TYPE_MAX
);
659 val
= val
<< BTRFS_KEY_TYPE_SHIFT
;
660 key
->flags
= (key
->flags
& ~(BTRFS_KEY_TYPE_MASK
)) | val
;
663 static inline u64
btrfs_header_blocknr(struct btrfs_header
*h
)
665 return le64_to_cpu(h
->blocknr
);
668 static inline void btrfs_set_header_blocknr(struct btrfs_header
*h
, u64 blocknr
)
670 h
->blocknr
= cpu_to_le64(blocknr
);
673 static inline u64
btrfs_header_generation(struct btrfs_header
*h
)
675 return le64_to_cpu(h
->generation
);
678 static inline void btrfs_set_header_generation(struct btrfs_header
*h
,
681 h
->generation
= cpu_to_le64(val
);
684 static inline u64
btrfs_header_owner(struct btrfs_header
*h
)
686 return le64_to_cpu(h
->owner
);
689 static inline void btrfs_set_header_owner(struct btrfs_header
*h
,
692 h
->owner
= cpu_to_le64(val
);
695 static inline u16
btrfs_header_nritems(struct btrfs_header
*h
)
697 return le16_to_cpu(h
->nritems
);
700 static inline void btrfs_set_header_nritems(struct btrfs_header
*h
, u16 val
)
702 h
->nritems
= cpu_to_le16(val
);
705 static inline u16
btrfs_header_flags(struct btrfs_header
*h
)
707 return le16_to_cpu(h
->flags
);
710 static inline void btrfs_set_header_flags(struct btrfs_header
*h
, u16 val
)
712 h
->flags
= cpu_to_le16(val
);
715 static inline int btrfs_header_level(struct btrfs_header
*h
)
720 static inline void btrfs_set_header_level(struct btrfs_header
*h
, int level
)
722 BUG_ON(level
> BTRFS_MAX_LEVEL
);
726 static inline int btrfs_is_leaf(struct btrfs_node
*n
)
728 return (btrfs_header_level(&n
->header
) == 0);
731 static inline u64
btrfs_root_blocknr(struct btrfs_root_item
*item
)
733 return le64_to_cpu(item
->blocknr
);
736 static inline void btrfs_set_root_blocknr(struct btrfs_root_item
*item
, u64 val
)
738 item
->blocknr
= cpu_to_le64(val
);
741 static inline u64
btrfs_root_dirid(struct btrfs_root_item
*item
)
743 return le64_to_cpu(item
->root_dirid
);
746 static inline void btrfs_set_root_dirid(struct btrfs_root_item
*item
, u64 val
)
748 item
->root_dirid
= cpu_to_le64(val
);
751 static inline u32
btrfs_root_refs(struct btrfs_root_item
*item
)
753 return le32_to_cpu(item
->refs
);
756 static inline void btrfs_set_root_refs(struct btrfs_root_item
*item
, u32 val
)
758 item
->refs
= cpu_to_le32(val
);
761 static inline u64
btrfs_super_blocknr(struct btrfs_super_block
*s
)
763 return le64_to_cpu(s
->blocknr
);
766 static inline void btrfs_set_super_blocknr(struct btrfs_super_block
*s
, u64 val
)
768 s
->blocknr
= cpu_to_le64(val
);
771 static inline u64
btrfs_super_generation(struct btrfs_super_block
*s
)
773 return le64_to_cpu(s
->generation
);
776 static inline void btrfs_set_super_generation(struct btrfs_super_block
*s
,
779 s
->generation
= cpu_to_le64(val
);
782 static inline u64
btrfs_super_root(struct btrfs_super_block
*s
)
784 return le64_to_cpu(s
->root
);
787 static inline void btrfs_set_super_root(struct btrfs_super_block
*s
, u64 val
)
789 s
->root
= cpu_to_le64(val
);
792 static inline u64
btrfs_super_total_blocks(struct btrfs_super_block
*s
)
794 return le64_to_cpu(s
->total_blocks
);
797 static inline void btrfs_set_super_total_blocks(struct btrfs_super_block
*s
,
800 s
->total_blocks
= cpu_to_le64(val
);
803 static inline u64
btrfs_super_blocks_used(struct btrfs_super_block
*s
)
805 return le64_to_cpu(s
->blocks_used
);
808 static inline void btrfs_set_super_blocks_used(struct btrfs_super_block
*s
,
811 s
->blocks_used
= cpu_to_le64(val
);
814 static inline u32
btrfs_super_blocksize(struct btrfs_super_block
*s
)
816 return le32_to_cpu(s
->blocksize
);
819 static inline void btrfs_set_super_blocksize(struct btrfs_super_block
*s
,
822 s
->blocksize
= cpu_to_le32(val
);
825 static inline u64
btrfs_super_root_dir(struct btrfs_super_block
*s
)
827 return le64_to_cpu(s
->root_dir_objectid
);
830 static inline void btrfs_set_super_root_dir(struct btrfs_super_block
*s
, u64
833 s
->root_dir_objectid
= cpu_to_le64(val
);
836 static inline u64
btrfs_super_last_device_id(struct btrfs_super_block
*s
)
838 return le64_to_cpu(s
->last_device_id
);
841 static inline void btrfs_set_super_last_device_id(struct btrfs_super_block
*s
,
844 s
->last_device_id
= cpu_to_le64(val
);
847 static inline u64
btrfs_super_device_id(struct btrfs_super_block
*s
)
849 return le64_to_cpu(s
->device_id
);
852 static inline void btrfs_set_super_device_id(struct btrfs_super_block
*s
,
855 s
->device_id
= cpu_to_le64(val
);
858 static inline u64
btrfs_super_device_block_start(struct btrfs_super_block
*s
)
860 return le64_to_cpu(s
->device_block_start
);
863 static inline void btrfs_set_super_device_block_start(struct btrfs_super_block
866 s
->device_block_start
= cpu_to_le64(val
);
869 static inline u64
btrfs_super_device_num_blocks(struct btrfs_super_block
*s
)
871 return le64_to_cpu(s
->device_num_blocks
);
874 static inline void btrfs_set_super_device_num_blocks(struct btrfs_super_block
877 s
->device_num_blocks
= cpu_to_le64(val
);
880 static inline u64
btrfs_super_device_root(struct btrfs_super_block
*s
)
882 return le64_to_cpu(s
->device_root
);
885 static inline void btrfs_set_super_device_root(struct btrfs_super_block
888 s
->device_root
= cpu_to_le64(val
);
891 static inline u8
*btrfs_leaf_data(struct btrfs_leaf
*l
)
893 return (u8
*)l
->items
;
896 static inline int btrfs_file_extent_type(struct btrfs_file_extent_item
*e
)
900 static inline void btrfs_set_file_extent_type(struct btrfs_file_extent_item
*e
,
906 static inline char *btrfs_file_extent_inline_start(struct
907 btrfs_file_extent_item
*e
)
909 return (char *)(&e
->disk_blocknr
);
912 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
914 return (unsigned long)(&((struct
915 btrfs_file_extent_item
*)NULL
)->disk_blocknr
) + datasize
;
918 static inline u32
btrfs_file_extent_inline_len(struct btrfs_item
*e
)
920 struct btrfs_file_extent_item
*fe
= NULL
;
921 return btrfs_item_size(e
) - (unsigned long)(&fe
->disk_blocknr
);
924 static inline u64
btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item
927 return le64_to_cpu(e
->disk_blocknr
);
930 static inline void btrfs_set_file_extent_disk_blocknr(struct
931 btrfs_file_extent_item
934 e
->disk_blocknr
= cpu_to_le64(val
);
937 static inline u64
btrfs_file_extent_generation(struct btrfs_file_extent_item
*e
)
939 return le64_to_cpu(e
->generation
);
942 static inline void btrfs_set_file_extent_generation(struct
943 btrfs_file_extent_item
*e
,
946 e
->generation
= cpu_to_le64(val
);
949 static inline u64
btrfs_file_extent_disk_num_blocks(struct
950 btrfs_file_extent_item
*e
)
952 return le64_to_cpu(e
->disk_num_blocks
);
955 static inline void btrfs_set_file_extent_disk_num_blocks(struct
956 btrfs_file_extent_item
959 e
->disk_num_blocks
= cpu_to_le64(val
);
962 static inline u64
btrfs_file_extent_offset(struct btrfs_file_extent_item
*e
)
964 return le64_to_cpu(e
->offset
);
967 static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item
970 e
->offset
= cpu_to_le64(val
);
973 static inline u64
btrfs_file_extent_num_blocks(struct btrfs_file_extent_item
976 return le64_to_cpu(e
->num_blocks
);
979 static inline void btrfs_set_file_extent_num_blocks(struct
980 btrfs_file_extent_item
*e
,
983 e
->num_blocks
= cpu_to_le64(val
);
986 static inline u16
btrfs_device_pathlen(struct btrfs_device_item
*d
)
988 return le16_to_cpu(d
->pathlen
);
991 static inline void btrfs_set_device_pathlen(struct btrfs_device_item
*d
,
994 d
->pathlen
= cpu_to_le16(val
);
997 static inline u64
btrfs_device_id(struct btrfs_device_item
*d
)
999 return le64_to_cpu(d
->device_id
);
1002 static inline void btrfs_set_device_id(struct btrfs_device_item
*d
,
1005 d
->device_id
= cpu_to_le64(val
);
1008 /* helper function to cast into the data area of the leaf. */
1009 #define btrfs_item_ptr(leaf, slot, type) \
1010 ((type *)(btrfs_leaf_data(leaf) + \
1011 btrfs_item_offset((leaf)->items + (slot))))
1013 int btrfs_comp_keys(struct btrfs_disk_key
*disk
, struct btrfs_key
*k2
);
1014 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1015 *root
, struct btrfs_path
*path
, u32 data_size
);
1016 struct btrfs_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1017 struct btrfs_root
*root
);
1018 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1019 struct btrfs_buffer
*buf
);
1020 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1021 *root
, u64 blocknr
, u64 num_blocks
, int pin
);
1022 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1023 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1025 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1026 void btrfs_init_path(struct btrfs_path
*p
);
1027 int btrfs_del_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1028 struct btrfs_path
*path
);
1029 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1030 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1031 int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1032 *root
, struct btrfs_path
*path
, struct btrfs_key
1033 *cpu_key
, u32 data_size
);
1034 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1035 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct btrfs_leaf
*leaf
);
1036 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1037 *root
, struct btrfs_buffer
*snap
);
1038 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
, struct
1040 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1041 struct btrfs_key
*key
);
1042 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1043 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1045 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1046 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1048 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1049 btrfs_root_item
*item
, struct btrfs_key
*key
);
1050 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1051 *root
, char *name
, int name_len
, u64 dir
,
1052 struct btrfs_key
*location
, u8 type
);
1053 int btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1054 *root
, struct btrfs_path
*path
, u64 dir
, char *name
,
1055 int name_len
, int mod
);
1056 int btrfs_match_dir_item_name(struct btrfs_root
*root
, struct btrfs_path
*path
,
1057 char *name
, int name_len
);
1058 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1059 struct btrfs_root
*fs_root
,
1060 u64 dirid
, u64
*objectid
);
1061 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1062 *root
, u64 objectid
, struct btrfs_inode_item
1064 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1065 *root
, struct btrfs_path
*path
, u64 objectid
, int mod
);
1066 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1067 struct btrfs_root
*root
);
1068 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1069 int btrfs_read_block_groups(struct btrfs_root
*root
);
1070 int btrfs_insert_block_group(struct btrfs_trans_handle
*trans
,
1071 struct btrfs_root
*root
,
1072 struct btrfs_key
*key
,
1073 struct btrfs_block_group_item
*bi
);