5 #include <linux/buffer_head.h>
6 #include <linux/workqueue.h>
9 struct btrfs_trans_handle
;
10 struct btrfs_transaction
;
11 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
12 extern struct kmem_cache
*btrfs_transaction_cachep
;
13 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
14 extern struct kmem_cache
*btrfs_path_cachep
;
16 #define BTRFS_MAGIC "_BtRfS_M"
18 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
19 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
20 #define BTRFS_FS_TREE_OBJECTID 3ULL
21 #define BTRFS_ROOT_TREE_DIR_OBJECTID 4ULL
22 #define BTRFS_FIRST_FREE_OBJECTID 5ULL
25 * we can actually store much bigger names, but lets not confuse the rest
28 #define BTRFS_NAME_LEN 255
30 /* 32 bytes in various csum fields */
31 #define BTRFS_CSUM_SIZE 32
32 /* four bytes for CRC32 */
33 #define BTRFS_CRC32_SIZE 4
34 #define BTRFS_EMPTY_DIR_SIZE 6
36 #define BTRFS_FT_UNKNOWN 0
37 #define BTRFS_FT_REG_FILE 1
38 #define BTRFS_FT_DIR 2
39 #define BTRFS_FT_CHRDEV 3
40 #define BTRFS_FT_BLKDEV 4
41 #define BTRFS_FT_FIFO 5
42 #define BTRFS_FT_SOCK 6
43 #define BTRFS_FT_SYMLINK 7
44 #define BTRFS_FT_MAX 8
47 * the key defines the order in the tree, and so it also defines (optimal)
48 * block layout. objectid corresonds to the inode number. The flags
49 * tells us things about the object, and is a kind of stream selector.
50 * so for a given inode, keys with flags of 1 might refer to the inode
51 * data, flags of 2 may point to file data in the btree and flags == 3
52 * may point to extents.
54 * offset is the starting byte offset for this key in the stream.
56 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
57 * in cpu native order. Otherwise they are identical and their sizes
58 * should be the same (ie both packed)
60 struct btrfs_disk_key
{
64 } __attribute__ ((__packed__
));
70 } __attribute__ ((__packed__
));
73 * every tree block (leaf or node) starts with this header.
76 u8 csum
[BTRFS_CSUM_SIZE
];
77 u8 fsid
[16]; /* FS specific uuid */
78 __le64 blocknr
; /* which block this node is supposed to live in */
84 } __attribute__ ((__packed__
));
86 #define BTRFS_MAX_LEVEL 8
87 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \
88 sizeof(struct btrfs_header)) / \
89 (sizeof(struct btrfs_disk_key) + sizeof(u64)))
90 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
91 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize))
92 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
93 sizeof(struct btrfs_item) - \
94 sizeof(struct btrfs_file_extent_item))
98 * the super block basically lists the main trees of the FS
99 * it currently lacks any block count etc etc
101 struct btrfs_super_block
{
102 u8 csum
[BTRFS_CSUM_SIZE
];
103 /* the first 3 fields must match struct btrfs_header */
104 u8 fsid
[16]; /* FS specific uuid */
105 __le64 blocknr
; /* this block number */
112 __le64 root_dir_objectid
;
113 } __attribute__ ((__packed__
));
116 * A leaf is full of items. offset and size tell us where to find
117 * the item in the leaf (relative to the start of the data area)
120 struct btrfs_disk_key key
;
123 } __attribute__ ((__packed__
));
126 * leaves have an item area and a data area:
127 * [item0, item1....itemN] [free space] [dataN...data1, data0]
129 * The data is separate from the items to get the keys closer together
133 struct btrfs_header header
;
134 struct btrfs_item items
[];
135 } __attribute__ ((__packed__
));
138 * all non-leaf blocks are nodes, they hold only keys and pointers to
141 struct btrfs_key_ptr
{
142 struct btrfs_disk_key key
;
144 } __attribute__ ((__packed__
));
147 struct btrfs_header header
;
148 struct btrfs_key_ptr ptrs
[];
149 } __attribute__ ((__packed__
));
152 * btrfs_paths remember the path taken from the root down to the leaf.
153 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
154 * to any other levels that are present.
156 * The slots array records the index of the item or block pointer
157 * used while walking the tree.
160 struct buffer_head
*nodes
[BTRFS_MAX_LEVEL
];
161 int slots
[BTRFS_MAX_LEVEL
];
165 * items in the extent btree are used to record the objectid of the
166 * owner of the block and the number of references
168 struct btrfs_extent_item
{
171 } __attribute__ ((__packed__
));
173 struct btrfs_inode_timespec
{
176 } __attribute__ ((__packed__
));
179 * there is no padding here on purpose. If you want to extent the inode,
180 * make a new item type
182 struct btrfs_inode_item
{
194 struct btrfs_inode_timespec atime
;
195 struct btrfs_inode_timespec ctime
;
196 struct btrfs_inode_timespec mtime
;
197 struct btrfs_inode_timespec otime
;
198 } __attribute__ ((__packed__
));
200 struct btrfs_dir_item
{
201 struct btrfs_disk_key location
;
205 } __attribute__ ((__packed__
));
207 struct btrfs_root_item
{
208 struct btrfs_inode_item inode
;
215 } __attribute__ ((__packed__
));
217 #define BTRFS_FILE_EXTENT_REG 0
218 #define BTRFS_FILE_EXTENT_INLINE 1
220 struct btrfs_file_extent_item
{
224 * disk space consumed by the extent, checksum blocks are included
228 __le64 disk_num_blocks
;
230 * the logical offset in file blocks (no csums)
231 * this extent record is for. This allows a file extent to point
232 * into the middle of an existing extent on disk, sharing it
233 * between two snapshots (useful if some bytes in the middle of the
234 * extent have changed
238 * the logical number of file blocks (no csums included)
241 } __attribute__ ((__packed__
));
243 struct btrfs_csum_item
{
245 } __attribute__ ((__packed__
));
247 /* tag for the radix tree of block groups in ram */
248 #define BTRFS_BLOCK_GROUP_DIRTY 0
249 #define BTRFS_BLOCK_GROUP_AVAIL 1
250 #define BTRFS_BLOCK_GROUP_SIZE (256 * 1024 * 1024)
253 #define BTRFS_BLOCK_GROUP_DATA 1
254 struct btrfs_block_group_item
{
257 } __attribute__ ((__packed__
));
259 struct btrfs_block_group_cache
{
260 struct btrfs_key key
;
261 struct btrfs_block_group_item item
;
262 struct radix_tree_root
*radix
;
273 struct btrfs_fs_info
{
274 spinlock_t hash_lock
;
275 struct btrfs_root
*extent_root
;
276 struct btrfs_root
*tree_root
;
277 struct radix_tree_root fs_roots_radix
;
278 struct radix_tree_root pending_del_radix
;
279 struct radix_tree_root pinned_radix
;
280 struct radix_tree_root block_group_radix
;
281 struct radix_tree_root block_group_data_radix
;
282 struct radix_tree_root extent_map_radix
;
284 u64 extent_tree_insert
[BTRFS_MAX_LEVEL
* 3];
285 int extent_tree_insert_nr
;
286 u64 extent_tree_prealloc
[BTRFS_MAX_LEVEL
* 3];
287 int extent_tree_prealloc_nr
;
290 struct btrfs_transaction
*running_transaction
;
291 struct btrfs_super_block
*disk_super
;
292 struct buffer_head
*sb_buffer
;
293 struct super_block
*sb
;
294 struct inode
*btree_inode
;
295 struct mutex trans_mutex
;
296 struct mutex fs_mutex
;
297 struct list_head trans_list
;
298 struct list_head dead_roots
;
299 struct crypto_hash
*hash_tfm
;
300 struct delayed_work trans_work
;
306 * in ram representation of the tree. extent_root is used for all allocations
307 * and for the extent tree extent_root root.
310 struct buffer_head
*node
;
311 struct buffer_head
*commit_root
;
312 struct btrfs_root_item root_item
;
313 struct btrfs_key root_key
;
314 struct btrfs_fs_info
*fs_info
;
322 u64 last_inode_alloc
;
325 /* the lower bits in the key flags defines the item type */
326 #define BTRFS_KEY_TYPE_MAX 256
327 #define BTRFS_KEY_TYPE_SHIFT 24
328 #define BTRFS_KEY_TYPE_MASK (((u32)BTRFS_KEY_TYPE_MAX - 1) << \
329 BTRFS_KEY_TYPE_SHIFT)
332 * inode items have the data typically returned from stat and store other
333 * info about object characteristics. There is one for every file and dir in
336 #define BTRFS_INODE_ITEM_KEY 1
338 /* reserve 2-15 close to the inode for later flexibility */
341 * dir items are the name -> inode pointers in a directory. There is one
342 * for every name in a directory.
344 #define BTRFS_DIR_ITEM_KEY 16
345 #define BTRFS_DIR_INDEX_KEY 17
347 * extent data is for file data
349 #define BTRFS_EXTENT_DATA_KEY 18
351 * csum items have the checksums for data in the extents
353 #define BTRFS_CSUM_ITEM_KEY 19
355 /* reserve 20-31 for other file stuff */
358 * root items point to tree roots. There are typically in the root
359 * tree used by the super block to find all the other trees
361 #define BTRFS_ROOT_ITEM_KEY 32
363 * extent items are in the extent map tree. These record which blocks
364 * are used, and how many references there are to each block
366 #define BTRFS_EXTENT_ITEM_KEY 33
369 * block groups give us hints into the extent allocation trees. Which
370 * blocks are free etc etc
372 #define BTRFS_BLOCK_GROUP_ITEM_KEY 34
375 * string items are for debugging. They just store a short string of
378 #define BTRFS_STRING_ITEM_KEY 253
381 static inline u64
btrfs_block_group_used(struct btrfs_block_group_item
*bi
)
383 return le64_to_cpu(bi
->used
);
386 static inline void btrfs_set_block_group_used(struct
387 btrfs_block_group_item
*bi
,
390 bi
->used
= cpu_to_le64(val
);
393 static inline u64
btrfs_inode_generation(struct btrfs_inode_item
*i
)
395 return le64_to_cpu(i
->generation
);
398 static inline void btrfs_set_inode_generation(struct btrfs_inode_item
*i
,
401 i
->generation
= cpu_to_le64(val
);
404 static inline u64
btrfs_inode_size(struct btrfs_inode_item
*i
)
406 return le64_to_cpu(i
->size
);
409 static inline void btrfs_set_inode_size(struct btrfs_inode_item
*i
, u64 val
)
411 i
->size
= cpu_to_le64(val
);
414 static inline u64
btrfs_inode_nblocks(struct btrfs_inode_item
*i
)
416 return le64_to_cpu(i
->nblocks
);
419 static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item
*i
, u64 val
)
421 i
->nblocks
= cpu_to_le64(val
);
424 static inline u64
btrfs_inode_block_group(struct btrfs_inode_item
*i
)
426 return le64_to_cpu(i
->block_group
);
429 static inline void btrfs_set_inode_block_group(struct btrfs_inode_item
*i
,
432 i
->block_group
= cpu_to_le64(val
);
435 static inline u32
btrfs_inode_nlink(struct btrfs_inode_item
*i
)
437 return le32_to_cpu(i
->nlink
);
440 static inline void btrfs_set_inode_nlink(struct btrfs_inode_item
*i
, u32 val
)
442 i
->nlink
= cpu_to_le32(val
);
445 static inline u32
btrfs_inode_uid(struct btrfs_inode_item
*i
)
447 return le32_to_cpu(i
->uid
);
450 static inline void btrfs_set_inode_uid(struct btrfs_inode_item
*i
, u32 val
)
452 i
->uid
= cpu_to_le32(val
);
455 static inline u32
btrfs_inode_gid(struct btrfs_inode_item
*i
)
457 return le32_to_cpu(i
->gid
);
460 static inline void btrfs_set_inode_gid(struct btrfs_inode_item
*i
, u32 val
)
462 i
->gid
= cpu_to_le32(val
);
465 static inline u32
btrfs_inode_mode(struct btrfs_inode_item
*i
)
467 return le32_to_cpu(i
->mode
);
470 static inline void btrfs_set_inode_mode(struct btrfs_inode_item
*i
, u32 val
)
472 i
->mode
= cpu_to_le32(val
);
475 static inline u32
btrfs_inode_rdev(struct btrfs_inode_item
*i
)
477 return le32_to_cpu(i
->rdev
);
480 static inline void btrfs_set_inode_rdev(struct btrfs_inode_item
*i
, u32 val
)
482 i
->rdev
= cpu_to_le32(val
);
485 static inline u16
btrfs_inode_flags(struct btrfs_inode_item
*i
)
487 return le16_to_cpu(i
->flags
);
490 static inline void btrfs_set_inode_flags(struct btrfs_inode_item
*i
, u16 val
)
492 i
->flags
= cpu_to_le16(val
);
495 static inline u16
btrfs_inode_compat_flags(struct btrfs_inode_item
*i
)
497 return le16_to_cpu(i
->compat_flags
);
500 static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item
*i
,
503 i
->compat_flags
= cpu_to_le16(val
);
506 static inline u64
btrfs_timespec_sec(struct btrfs_inode_timespec
*ts
)
508 return le64_to_cpu(ts
->sec
);
511 static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec
*ts
,
514 ts
->sec
= cpu_to_le64(val
);
517 static inline u32
btrfs_timespec_nsec(struct btrfs_inode_timespec
*ts
)
519 return le32_to_cpu(ts
->nsec
);
522 static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec
*ts
,
525 ts
->nsec
= cpu_to_le32(val
);
528 static inline u32
btrfs_extent_refs(struct btrfs_extent_item
*ei
)
530 return le32_to_cpu(ei
->refs
);
533 static inline void btrfs_set_extent_refs(struct btrfs_extent_item
*ei
, u32 val
)
535 ei
->refs
= cpu_to_le32(val
);
538 static inline u64
btrfs_extent_owner(struct btrfs_extent_item
*ei
)
540 return le64_to_cpu(ei
->owner
);
543 static inline void btrfs_set_extent_owner(struct btrfs_extent_item
*ei
, u64 val
)
545 ei
->owner
= cpu_to_le64(val
);
548 static inline u64
btrfs_node_blockptr(struct btrfs_node
*n
, int nr
)
550 return le64_to_cpu(n
->ptrs
[nr
].blockptr
);
554 static inline void btrfs_set_node_blockptr(struct btrfs_node
*n
, int nr
,
557 n
->ptrs
[nr
].blockptr
= cpu_to_le64(val
);
560 static inline u32
btrfs_item_offset(struct btrfs_item
*item
)
562 return le32_to_cpu(item
->offset
);
565 static inline void btrfs_set_item_offset(struct btrfs_item
*item
, u32 val
)
567 item
->offset
= cpu_to_le32(val
);
570 static inline u32
btrfs_item_end(struct btrfs_item
*item
)
572 return le32_to_cpu(item
->offset
) + le16_to_cpu(item
->size
);
575 static inline u16
btrfs_item_size(struct btrfs_item
*item
)
577 return le16_to_cpu(item
->size
);
580 static inline void btrfs_set_item_size(struct btrfs_item
*item
, u16 val
)
582 item
->size
= cpu_to_le16(val
);
585 static inline u16
btrfs_dir_flags(struct btrfs_dir_item
*d
)
587 return le16_to_cpu(d
->flags
);
590 static inline void btrfs_set_dir_flags(struct btrfs_dir_item
*d
, u16 val
)
592 d
->flags
= cpu_to_le16(val
);
595 static inline u8
btrfs_dir_type(struct btrfs_dir_item
*d
)
600 static inline void btrfs_set_dir_type(struct btrfs_dir_item
*d
, u8 val
)
605 static inline u16
btrfs_dir_name_len(struct btrfs_dir_item
*d
)
607 return le16_to_cpu(d
->name_len
);
610 static inline void btrfs_set_dir_name_len(struct btrfs_dir_item
*d
, u16 val
)
612 d
->name_len
= cpu_to_le16(val
);
615 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
616 struct btrfs_disk_key
*disk
)
618 cpu
->offset
= le64_to_cpu(disk
->offset
);
619 cpu
->flags
= le32_to_cpu(disk
->flags
);
620 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
623 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
624 struct btrfs_key
*cpu
)
626 disk
->offset
= cpu_to_le64(cpu
->offset
);
627 disk
->flags
= cpu_to_le32(cpu
->flags
);
628 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
631 static inline u64
btrfs_disk_key_objectid(struct btrfs_disk_key
*disk
)
633 return le64_to_cpu(disk
->objectid
);
636 static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key
*disk
,
639 disk
->objectid
= cpu_to_le64(val
);
642 static inline u64
btrfs_disk_key_offset(struct btrfs_disk_key
*disk
)
644 return le64_to_cpu(disk
->offset
);
647 static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key
*disk
,
650 disk
->offset
= cpu_to_le64(val
);
653 static inline u32
btrfs_disk_key_flags(struct btrfs_disk_key
*disk
)
655 return le32_to_cpu(disk
->flags
);
658 static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key
*disk
,
661 disk
->flags
= cpu_to_le32(val
);
664 static inline u32
btrfs_disk_key_type(struct btrfs_disk_key
*key
)
666 return le32_to_cpu(key
->flags
) >> BTRFS_KEY_TYPE_SHIFT
;
669 static inline void btrfs_set_disk_key_type(struct btrfs_disk_key
*key
,
672 u32 flags
= btrfs_disk_key_flags(key
);
673 BUG_ON(val
>= BTRFS_KEY_TYPE_MAX
);
674 val
= val
<< BTRFS_KEY_TYPE_SHIFT
;
675 flags
= (flags
& ~BTRFS_KEY_TYPE_MASK
) | val
;
676 btrfs_set_disk_key_flags(key
, flags
);
679 static inline u32
btrfs_key_type(struct btrfs_key
*key
)
681 return key
->flags
>> BTRFS_KEY_TYPE_SHIFT
;
684 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u32 val
)
686 BUG_ON(val
>= BTRFS_KEY_TYPE_MAX
);
687 val
= val
<< BTRFS_KEY_TYPE_SHIFT
;
688 key
->flags
= (key
->flags
& ~(BTRFS_KEY_TYPE_MASK
)) | val
;
691 static inline u64
btrfs_header_blocknr(struct btrfs_header
*h
)
693 return le64_to_cpu(h
->blocknr
);
696 static inline void btrfs_set_header_blocknr(struct btrfs_header
*h
, u64 blocknr
)
698 h
->blocknr
= cpu_to_le64(blocknr
);
701 static inline u64
btrfs_header_generation(struct btrfs_header
*h
)
703 return le64_to_cpu(h
->generation
);
706 static inline void btrfs_set_header_generation(struct btrfs_header
*h
,
709 h
->generation
= cpu_to_le64(val
);
712 static inline u64
btrfs_header_owner(struct btrfs_header
*h
)
714 return le64_to_cpu(h
->owner
);
717 static inline void btrfs_set_header_owner(struct btrfs_header
*h
,
720 h
->owner
= cpu_to_le64(val
);
723 static inline u16
btrfs_header_nritems(struct btrfs_header
*h
)
725 return le16_to_cpu(h
->nritems
);
728 static inline void btrfs_set_header_nritems(struct btrfs_header
*h
, u16 val
)
730 h
->nritems
= cpu_to_le16(val
);
733 static inline u16
btrfs_header_flags(struct btrfs_header
*h
)
735 return le16_to_cpu(h
->flags
);
738 static inline void btrfs_set_header_flags(struct btrfs_header
*h
, u16 val
)
740 h
->flags
= cpu_to_le16(val
);
743 static inline int btrfs_header_level(struct btrfs_header
*h
)
748 static inline void btrfs_set_header_level(struct btrfs_header
*h
, int level
)
750 BUG_ON(level
> BTRFS_MAX_LEVEL
);
754 static inline int btrfs_is_leaf(struct btrfs_node
*n
)
756 return (btrfs_header_level(&n
->header
) == 0);
759 static inline u64
btrfs_root_blocknr(struct btrfs_root_item
*item
)
761 return le64_to_cpu(item
->blocknr
);
764 static inline void btrfs_set_root_blocknr(struct btrfs_root_item
*item
, u64 val
)
766 item
->blocknr
= cpu_to_le64(val
);
769 static inline u64
btrfs_root_dirid(struct btrfs_root_item
*item
)
771 return le64_to_cpu(item
->root_dirid
);
774 static inline void btrfs_set_root_dirid(struct btrfs_root_item
*item
, u64 val
)
776 item
->root_dirid
= cpu_to_le64(val
);
779 static inline u32
btrfs_root_refs(struct btrfs_root_item
*item
)
781 return le32_to_cpu(item
->refs
);
784 static inline void btrfs_set_root_refs(struct btrfs_root_item
*item
, u32 val
)
786 item
->refs
= cpu_to_le32(val
);
789 static inline u64
btrfs_super_blocknr(struct btrfs_super_block
*s
)
791 return le64_to_cpu(s
->blocknr
);
794 static inline void btrfs_set_super_blocknr(struct btrfs_super_block
*s
, u64 val
)
796 s
->blocknr
= cpu_to_le64(val
);
799 static inline u64
btrfs_super_generation(struct btrfs_super_block
*s
)
801 return le64_to_cpu(s
->generation
);
804 static inline void btrfs_set_super_generation(struct btrfs_super_block
*s
,
807 s
->generation
= cpu_to_le64(val
);
810 static inline u64
btrfs_super_root(struct btrfs_super_block
*s
)
812 return le64_to_cpu(s
->root
);
815 static inline void btrfs_set_super_root(struct btrfs_super_block
*s
, u64 val
)
817 s
->root
= cpu_to_le64(val
);
820 static inline u64
btrfs_super_total_blocks(struct btrfs_super_block
*s
)
822 return le64_to_cpu(s
->total_blocks
);
825 static inline void btrfs_set_super_total_blocks(struct btrfs_super_block
*s
,
828 s
->total_blocks
= cpu_to_le64(val
);
831 static inline u64
btrfs_super_blocks_used(struct btrfs_super_block
*s
)
833 return le64_to_cpu(s
->blocks_used
);
836 static inline void btrfs_set_super_blocks_used(struct btrfs_super_block
*s
,
839 s
->blocks_used
= cpu_to_le64(val
);
842 static inline u32
btrfs_super_blocksize(struct btrfs_super_block
*s
)
844 return le32_to_cpu(s
->blocksize
);
847 static inline void btrfs_set_super_blocksize(struct btrfs_super_block
*s
,
850 s
->blocksize
= cpu_to_le32(val
);
853 static inline u64
btrfs_super_root_dir(struct btrfs_super_block
*s
)
855 return le64_to_cpu(s
->root_dir_objectid
);
858 static inline void btrfs_set_super_root_dir(struct btrfs_super_block
*s
, u64
861 s
->root_dir_objectid
= cpu_to_le64(val
);
864 static inline u8
*btrfs_leaf_data(struct btrfs_leaf
*l
)
866 return (u8
*)l
->items
;
869 static inline int btrfs_file_extent_type(struct btrfs_file_extent_item
*e
)
873 static inline void btrfs_set_file_extent_type(struct btrfs_file_extent_item
*e
,
879 static inline char *btrfs_file_extent_inline_start(struct
880 btrfs_file_extent_item
*e
)
882 return (char *)(&e
->disk_blocknr
);
885 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
887 return (unsigned long)(&((struct
888 btrfs_file_extent_item
*)NULL
)->disk_blocknr
) + datasize
;
891 static inline u32
btrfs_file_extent_inline_len(struct btrfs_item
*e
)
893 struct btrfs_file_extent_item
*fe
= NULL
;
894 return btrfs_item_size(e
) - (unsigned long)(&fe
->disk_blocknr
);
897 static inline u64
btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item
900 return le64_to_cpu(e
->disk_blocknr
);
903 static inline void btrfs_set_file_extent_disk_blocknr(struct
904 btrfs_file_extent_item
907 e
->disk_blocknr
= cpu_to_le64(val
);
910 static inline u64
btrfs_file_extent_generation(struct btrfs_file_extent_item
*e
)
912 return le64_to_cpu(e
->generation
);
915 static inline void btrfs_set_file_extent_generation(struct
916 btrfs_file_extent_item
*e
,
919 e
->generation
= cpu_to_le64(val
);
922 static inline u64
btrfs_file_extent_disk_num_blocks(struct
923 btrfs_file_extent_item
*e
)
925 return le64_to_cpu(e
->disk_num_blocks
);
928 static inline void btrfs_set_file_extent_disk_num_blocks(struct
929 btrfs_file_extent_item
932 e
->disk_num_blocks
= cpu_to_le64(val
);
935 static inline u64
btrfs_file_extent_offset(struct btrfs_file_extent_item
*e
)
937 return le64_to_cpu(e
->offset
);
940 static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item
943 e
->offset
= cpu_to_le64(val
);
946 static inline u64
btrfs_file_extent_num_blocks(struct btrfs_file_extent_item
949 return le64_to_cpu(e
->num_blocks
);
952 static inline void btrfs_set_file_extent_num_blocks(struct
953 btrfs_file_extent_item
*e
,
956 e
->num_blocks
= cpu_to_le64(val
);
959 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
961 return sb
->s_fs_info
;
964 static inline void btrfs_check_bounds(void *vptr
, size_t len
,
965 void *vcontainer
, size_t container_len
)
968 char *container
= vcontainer
;
969 WARN_ON(ptr
< container
);
970 WARN_ON(ptr
+ len
> container
+ container_len
);
973 static inline void btrfs_memcpy(struct btrfs_root
*root
,
975 void *dst
, const void *src
, size_t nr
)
977 btrfs_check_bounds(dst
, nr
, dst_block
, root
->fs_info
->sb
->s_blocksize
);
978 memcpy(dst
, src
, nr
);
981 static inline void btrfs_memmove(struct btrfs_root
*root
,
983 void *dst
, void *src
, size_t nr
)
985 btrfs_check_bounds(dst
, nr
, dst_block
, root
->fs_info
->sb
->s_blocksize
);
986 memmove(dst
, src
, nr
);
989 static inline void btrfs_mark_buffer_dirty(struct buffer_head
*bh
)
991 WARN_ON(!atomic_read(&bh
->b_count
));
992 mark_buffer_dirty(bh
);
995 /* helper function to cast into the data area of the leaf. */
996 #define btrfs_item_ptr(leaf, slot, type) \
997 ((type *)(btrfs_leaf_data(leaf) + \
998 btrfs_item_offset((leaf)->items + (slot))))
1001 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1002 btrfs_fs_info
*info
,
1004 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1005 struct btrfs_block_group_cache
1006 *hint
, u64 search_start
,
1007 int data
, int owner
);
1008 int btrfs_inc_root_ref(struct btrfs_trans_handle
*trans
,
1009 struct btrfs_root
*root
);
1010 struct buffer_head
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1011 struct btrfs_root
*root
, u64 hint
);
1012 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1013 struct btrfs_root
*root
, u64 owner
,
1014 u64 num_blocks
, u64 search_start
,
1015 u64 search_end
, struct btrfs_key
*ins
, int data
);
1016 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1017 struct buffer_head
*buf
);
1018 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1019 *root
, u64 blocknr
, u64 num_blocks
, int pin
);
1020 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
, struct
1022 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1023 struct btrfs_root
*root
,
1024 u64 blocknr
, u64 num_blocks
);
1025 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1026 struct btrfs_root
*root
);
1027 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1028 int btrfs_read_block_groups(struct btrfs_root
*root
);
1030 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1031 *root
, struct btrfs_path
*path
, u32 data_size
);
1032 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1033 struct btrfs_root
*root
,
1034 struct btrfs_path
*path
,
1036 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1037 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1039 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1040 struct btrfs_path
*btrfs_alloc_path(void);
1041 void btrfs_free_path(struct btrfs_path
*p
);
1042 void btrfs_init_path(struct btrfs_path
*p
);
1043 int btrfs_del_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1044 struct btrfs_path
*path
);
1045 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1046 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1047 int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1048 *root
, struct btrfs_path
*path
, struct btrfs_key
1049 *cpu_key
, u32 data_size
);
1050 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1051 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct btrfs_leaf
*leaf
);
1052 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1053 *root
, struct buffer_head
*snap
);
1055 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1056 struct btrfs_key
*key
);
1057 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1058 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1060 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1061 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1063 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1064 btrfs_root_item
*item
, struct btrfs_key
*key
);
1066 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1067 *root
, const char *name
, int name_len
, u64 dir
,
1068 struct btrfs_key
*location
, u8 type
);
1069 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1070 struct btrfs_root
*root
,
1071 struct btrfs_path
*path
, u64 dir
,
1072 const char *name
, int name_len
,
1074 struct btrfs_dir_item
*
1075 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1076 struct btrfs_root
*root
,
1077 struct btrfs_path
*path
, u64 dir
,
1078 u64 objectid
, const char *name
, int name_len
,
1080 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1081 struct btrfs_path
*path
,
1082 const char *name
, int name_len
);
1083 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1084 struct btrfs_root
*root
,
1085 struct btrfs_path
*path
,
1086 struct btrfs_dir_item
*di
);
1088 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1089 struct btrfs_root
*fs_root
,
1090 u64 dirid
, u64
*objectid
);
1091 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1094 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1095 *root
, u64 objectid
, struct btrfs_inode_item
1097 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1098 *root
, struct btrfs_path
*path
,
1099 struct btrfs_key
*location
, int mod
);
1102 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1103 struct btrfs_root
*root
,
1104 u64 objectid
, u64 pos
, u64 offset
,
1105 u64 disk_num_blocks
,
1107 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1108 struct btrfs_root
*root
,
1109 struct btrfs_path
*path
, u64 objectid
,
1110 u64 blocknr
, int mod
);
1111 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
1112 struct btrfs_root
*root
,
1113 u64 objectid
, u64 offset
,
1114 char *data
, size_t len
);
1115 int btrfs_csum_verify_file_block(struct btrfs_root
*root
,
1116 u64 objectid
, u64 offset
,
1117 char *data
, size_t len
);
1118 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1119 struct btrfs_root
*root
,
1120 struct btrfs_path
*path
,
1121 u64 objectid
, u64 offset
,
1123 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1124 struct btrfs_root
*root
, struct btrfs_path
*path
,
1127 void btrfs_delete_inode(struct inode
*inode
);
1128 void btrfs_read_locked_inode(struct inode
*inode
);
1129 int btrfs_write_inode(struct inode
*inode
, int wait
);
1130 void btrfs_dirty_inode(struct inode
*inode
);
1131 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
1132 void btrfs_destroy_inode(struct inode
*inode
);
1133 int btrfs_init_cachep(void);
1134 void btrfs_destroy_cachep(void);
1135 int btrfs_ioctl(struct inode
*inode
, struct file
*filp
, unsigned int cmd
,
1137 long btrfs_compat_ioctl(struct file
*file
, unsigned int cmd
,
1139 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
1140 struct btrfs_root
*root
);
1141 int btrfs_commit_write(struct file
*file
, struct page
*page
,
1142 unsigned from
, unsigned to
);
1143 int btrfs_get_block(struct inode
*inode
, sector_t iblock
,
1144 struct buffer_head
*result
, int create
);
1146 extern struct file_operations btrfs_file_operations
;
1147 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
1148 struct btrfs_root
*root
, struct inode
*inode
,
1149 u64 start
, u64 end
, u64
*hint_block
);