5 #include <linux/buffer_head.h>
6 #include <linux/kobject.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_DEV_TREE_OBJECTID 2ULL
20 #define BTRFS_EXTENT_TREE_OBJECTID 3ULL
21 #define BTRFS_FS_TREE_OBJECTID 4ULL
22 #define BTRFS_ROOT_TREE_DIR_OBJECTID 5ULL
23 #define BTRFS_FIRST_FREE_OBJECTID 6ULL
26 * we can actually store much bigger names, but lets not confuse the rest
29 #define BTRFS_NAME_LEN 255
31 /* 32 bytes in various csum fields */
32 #define BTRFS_CSUM_SIZE 32
33 /* four bytes for CRC32 */
34 #define BTRFS_CRC32_SIZE 4
35 #define BTRFS_EMPTY_DIR_SIZE 6
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))
83 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
84 sizeof(struct btrfs_item) - \
85 sizeof(struct btrfs_file_extent_item))
89 * the super block basically lists the main trees of the FS
90 * it currently lacks any block count etc etc
92 struct btrfs_super_block
{
93 u8 csum
[BTRFS_CSUM_SIZE
];
94 /* the first 3 fields must match struct btrfs_header */
95 u8 fsid
[16]; /* FS specific uuid */
96 __le64 blocknr
; /* this block number */
103 __le64 root_dir_objectid
;
104 __le64 last_device_id
;
105 /* fields below here vary with the underlying disk */
106 __le64 device_block_start
;
107 __le64 device_num_blocks
;
110 } __attribute__ ((__packed__
));
113 * A leaf is full of items. offset and size tell us where to find
114 * the item in the leaf (relative to the start of the data area)
117 struct btrfs_disk_key key
;
120 } __attribute__ ((__packed__
));
123 * leaves have an item area and a data area:
124 * [item0, item1....itemN] [free space] [dataN...data1, data0]
126 * The data is separate from the items to get the keys closer together
130 struct btrfs_header header
;
131 struct btrfs_item items
[];
132 } __attribute__ ((__packed__
));
135 * all non-leaf blocks are nodes, they hold only keys and pointers to
138 struct btrfs_key_ptr
{
139 struct btrfs_disk_key key
;
141 } __attribute__ ((__packed__
));
144 struct btrfs_header header
;
145 struct btrfs_key_ptr ptrs
[];
146 } __attribute__ ((__packed__
));
149 * btrfs_paths remember the path taken from the root down to the leaf.
150 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
151 * to any other levels that are present.
153 * The slots array records the index of the item or block pointer
154 * used while walking the tree.
157 struct buffer_head
*nodes
[BTRFS_MAX_LEVEL
];
158 int slots
[BTRFS_MAX_LEVEL
];
162 * items in the extent btree are used to record the objectid of the
163 * owner of the block and the number of references
165 struct btrfs_extent_item
{
168 } __attribute__ ((__packed__
));
170 struct btrfs_inode_timespec
{
173 } __attribute__ ((__packed__
));
176 * there is no padding here on purpose. If you want to extent the inode,
177 * make a new item type
179 struct btrfs_inode_item
{
191 struct btrfs_inode_timespec atime
;
192 struct btrfs_inode_timespec ctime
;
193 struct btrfs_inode_timespec mtime
;
194 struct btrfs_inode_timespec otime
;
195 } __attribute__ ((__packed__
));
197 struct btrfs_dir_item
{
198 struct btrfs_disk_key location
;
202 } __attribute__ ((__packed__
));
204 struct btrfs_root_item
{
205 struct btrfs_inode_item inode
;
212 } __attribute__ ((__packed__
));
214 #define BTRFS_FILE_EXTENT_REG 0
215 #define BTRFS_FILE_EXTENT_INLINE 1
217 struct btrfs_file_extent_item
{
221 * disk space consumed by the extent, checksum blocks are included
225 __le64 disk_num_blocks
;
227 * the logical offset in file blocks (no csums)
228 * this extent record is for. This allows a file extent to point
229 * into the middle of an existing extent on disk, sharing it
230 * between two snapshots (useful if some bytes in the middle of the
231 * extent have changed
235 * the logical number of file blocks (no csums included)
238 } __attribute__ ((__packed__
));
240 struct btrfs_csum_item
{
242 } __attribute__ ((__packed__
));
244 struct btrfs_device_item
{
247 } __attribute__ ((__packed__
));
249 /* tag for the radix tree of block groups in ram */
250 #define BTRFS_BLOCK_GROUP_DIRTY 0
251 #define BTRFS_BLOCK_GROUP_AVAIL 1
252 #define BTRFS_BLOCK_GROUP_SIZE (256 * 1024 * 1024)
255 #define BTRFS_BLOCK_GROUP_DATA 1
256 struct btrfs_block_group_item
{
259 } __attribute__ ((__packed__
));
261 struct btrfs_block_group_cache
{
262 struct btrfs_key key
;
263 struct btrfs_block_group_item item
;
264 struct radix_tree_root
*radix
;
274 struct btrfs_fs_info
{
275 struct btrfs_root
*extent_root
;
276 struct btrfs_root
*tree_root
;
277 struct btrfs_root
*dev_root
;
278 struct radix_tree_root fs_roots_radix
;
279 struct radix_tree_root pending_del_radix
;
280 struct radix_tree_root pinned_radix
;
281 struct radix_tree_root dev_radix
;
282 struct radix_tree_root block_group_radix
;
283 struct radix_tree_root block_group_data_radix
;
284 struct radix_tree_root extent_map_radix
;
286 u64 extent_tree_insert
[BTRFS_MAX_LEVEL
* 3];
287 int extent_tree_insert_nr
;
288 u64 extent_tree_prealloc
[BTRFS_MAX_LEVEL
* 3];
289 int extent_tree_prealloc_nr
;
292 struct btrfs_transaction
*running_transaction
;
293 struct btrfs_super_block
*disk_super
;
294 struct buffer_head
*sb_buffer
;
295 struct super_block
*sb
;
296 struct inode
*btree_inode
;
297 struct mutex trans_mutex
;
298 struct mutex fs_mutex
;
299 struct list_head trans_list
;
300 struct crypto_hash
*hash_tfm
;
301 spinlock_t hash_lock
;
307 * in ram representation of the tree. extent_root is used for all allocations
308 * and for the extent tree extent_root root.
311 struct buffer_head
*node
;
312 struct buffer_head
*commit_root
;
313 struct btrfs_root_item root_item
;
314 struct btrfs_key root_key
;
315 struct btrfs_fs_info
*fs_info
;
323 u64 last_inode_alloc
;
326 /* the lower bits in the key flags defines the item type */
327 #define BTRFS_KEY_TYPE_MAX 256
328 #define BTRFS_KEY_TYPE_SHIFT 24
329 #define BTRFS_KEY_TYPE_MASK (((u32)BTRFS_KEY_TYPE_MAX - 1) << \
330 BTRFS_KEY_TYPE_SHIFT)
333 * inode items have the data typically returned from stat and store other
334 * info about object characteristics. There is one for every file and dir in
337 #define BTRFS_INODE_ITEM_KEY 1
339 /* reserve 2-15 close to the inode for later flexibility */
342 * dir items are the name -> inode pointers in a directory. There is one
343 * for every name in a directory.
345 #define BTRFS_DIR_ITEM_KEY 16
346 #define BTRFS_DIR_INDEX_KEY 17
348 * extent data is for file data
350 #define BTRFS_EXTENT_DATA_KEY 18
352 * csum items have the checksums for data in the extents
354 #define BTRFS_CSUM_ITEM_KEY 19
356 /* reserve 20-31 for other file stuff */
359 * root items point to tree roots. There are typically in the root
360 * tree used by the super block to find all the other trees
362 #define BTRFS_ROOT_ITEM_KEY 32
364 * extent items are in the extent map tree. These record which blocks
365 * are used, and how many references there are to each block
367 #define BTRFS_EXTENT_ITEM_KEY 33
370 * block groups give us hints into the extent allocation trees. Which
371 * blocks are free etc etc
373 #define BTRFS_BLOCK_GROUP_ITEM_KEY 34
376 * dev items list the devices that make up the FS
378 #define BTRFS_DEV_ITEM_KEY 35
381 * string items are for debugging. They just store a short string of
384 #define BTRFS_STRING_ITEM_KEY 253
387 static inline u64
btrfs_block_group_used(struct btrfs_block_group_item
*bi
)
389 return le64_to_cpu(bi
->used
);
392 static inline void btrfs_set_block_group_used(struct
393 btrfs_block_group_item
*bi
,
396 bi
->used
= cpu_to_le64(val
);
399 static inline u64
btrfs_inode_generation(struct btrfs_inode_item
*i
)
401 return le64_to_cpu(i
->generation
);
404 static inline void btrfs_set_inode_generation(struct btrfs_inode_item
*i
,
407 i
->generation
= cpu_to_le64(val
);
410 static inline u64
btrfs_inode_size(struct btrfs_inode_item
*i
)
412 return le64_to_cpu(i
->size
);
415 static inline void btrfs_set_inode_size(struct btrfs_inode_item
*i
, u64 val
)
417 i
->size
= cpu_to_le64(val
);
420 static inline u64
btrfs_inode_nblocks(struct btrfs_inode_item
*i
)
422 return le64_to_cpu(i
->nblocks
);
425 static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item
*i
, u64 val
)
427 i
->nblocks
= cpu_to_le64(val
);
430 static inline u64
btrfs_inode_block_group(struct btrfs_inode_item
*i
)
432 return le64_to_cpu(i
->block_group
);
435 static inline void btrfs_set_inode_block_group(struct btrfs_inode_item
*i
,
438 i
->block_group
= cpu_to_le64(val
);
441 static inline u32
btrfs_inode_nlink(struct btrfs_inode_item
*i
)
443 return le32_to_cpu(i
->nlink
);
446 static inline void btrfs_set_inode_nlink(struct btrfs_inode_item
*i
, u32 val
)
448 i
->nlink
= cpu_to_le32(val
);
451 static inline u32
btrfs_inode_uid(struct btrfs_inode_item
*i
)
453 return le32_to_cpu(i
->uid
);
456 static inline void btrfs_set_inode_uid(struct btrfs_inode_item
*i
, u32 val
)
458 i
->uid
= cpu_to_le32(val
);
461 static inline u32
btrfs_inode_gid(struct btrfs_inode_item
*i
)
463 return le32_to_cpu(i
->gid
);
466 static inline void btrfs_set_inode_gid(struct btrfs_inode_item
*i
, u32 val
)
468 i
->gid
= cpu_to_le32(val
);
471 static inline u32
btrfs_inode_mode(struct btrfs_inode_item
*i
)
473 return le32_to_cpu(i
->mode
);
476 static inline void btrfs_set_inode_mode(struct btrfs_inode_item
*i
, u32 val
)
478 i
->mode
= cpu_to_le32(val
);
481 static inline u32
btrfs_inode_rdev(struct btrfs_inode_item
*i
)
483 return le32_to_cpu(i
->rdev
);
486 static inline void btrfs_set_inode_rdev(struct btrfs_inode_item
*i
, u32 val
)
488 i
->rdev
= cpu_to_le32(val
);
491 static inline u16
btrfs_inode_flags(struct btrfs_inode_item
*i
)
493 return le16_to_cpu(i
->flags
);
496 static inline void btrfs_set_inode_flags(struct btrfs_inode_item
*i
, u16 val
)
498 i
->flags
= cpu_to_le16(val
);
501 static inline u16
btrfs_inode_compat_flags(struct btrfs_inode_item
*i
)
503 return le16_to_cpu(i
->compat_flags
);
506 static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item
*i
,
509 i
->compat_flags
= cpu_to_le16(val
);
512 static inline u64
btrfs_timespec_sec(struct btrfs_inode_timespec
*ts
)
514 return le64_to_cpu(ts
->sec
);
517 static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec
*ts
,
520 ts
->sec
= cpu_to_le64(val
);
523 static inline u32
btrfs_timespec_nsec(struct btrfs_inode_timespec
*ts
)
525 return le32_to_cpu(ts
->nsec
);
528 static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec
*ts
,
531 ts
->nsec
= cpu_to_le32(val
);
534 static inline u32
btrfs_extent_refs(struct btrfs_extent_item
*ei
)
536 return le32_to_cpu(ei
->refs
);
539 static inline void btrfs_set_extent_refs(struct btrfs_extent_item
*ei
, u32 val
)
541 ei
->refs
= cpu_to_le32(val
);
544 static inline u64
btrfs_extent_owner(struct btrfs_extent_item
*ei
)
546 return le64_to_cpu(ei
->owner
);
549 static inline void btrfs_set_extent_owner(struct btrfs_extent_item
*ei
, u64 val
)
551 ei
->owner
= cpu_to_le64(val
);
554 static inline u64
btrfs_node_blockptr(struct btrfs_node
*n
, int nr
)
556 return le64_to_cpu(n
->ptrs
[nr
].blockptr
);
560 static inline void btrfs_set_node_blockptr(struct btrfs_node
*n
, int nr
,
563 n
->ptrs
[nr
].blockptr
= cpu_to_le64(val
);
566 static inline u32
btrfs_item_offset(struct btrfs_item
*item
)
568 return le32_to_cpu(item
->offset
);
571 static inline void btrfs_set_item_offset(struct btrfs_item
*item
, u32 val
)
573 item
->offset
= cpu_to_le32(val
);
576 static inline u32
btrfs_item_end(struct btrfs_item
*item
)
578 return le32_to_cpu(item
->offset
) + le16_to_cpu(item
->size
);
581 static inline u16
btrfs_item_size(struct btrfs_item
*item
)
583 return le16_to_cpu(item
->size
);
586 static inline void btrfs_set_item_size(struct btrfs_item
*item
, u16 val
)
588 item
->size
= cpu_to_le16(val
);
591 static inline u16
btrfs_dir_flags(struct btrfs_dir_item
*d
)
593 return le16_to_cpu(d
->flags
);
596 static inline void btrfs_set_dir_flags(struct btrfs_dir_item
*d
, u16 val
)
598 d
->flags
= cpu_to_le16(val
);
601 static inline u8
btrfs_dir_type(struct btrfs_dir_item
*d
)
606 static inline void btrfs_set_dir_type(struct btrfs_dir_item
*d
, u8 val
)
611 static inline u16
btrfs_dir_name_len(struct btrfs_dir_item
*d
)
613 return le16_to_cpu(d
->name_len
);
616 static inline void btrfs_set_dir_name_len(struct btrfs_dir_item
*d
, u16 val
)
618 d
->name_len
= cpu_to_le16(val
);
621 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
622 struct btrfs_disk_key
*disk
)
624 cpu
->offset
= le64_to_cpu(disk
->offset
);
625 cpu
->flags
= le32_to_cpu(disk
->flags
);
626 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
629 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
630 struct btrfs_key
*cpu
)
632 disk
->offset
= cpu_to_le64(cpu
->offset
);
633 disk
->flags
= cpu_to_le32(cpu
->flags
);
634 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
637 static inline u64
btrfs_disk_key_objectid(struct btrfs_disk_key
*disk
)
639 return le64_to_cpu(disk
->objectid
);
642 static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key
*disk
,
645 disk
->objectid
= cpu_to_le64(val
);
648 static inline u64
btrfs_disk_key_offset(struct btrfs_disk_key
*disk
)
650 return le64_to_cpu(disk
->offset
);
653 static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key
*disk
,
656 disk
->offset
= cpu_to_le64(val
);
659 static inline u32
btrfs_disk_key_flags(struct btrfs_disk_key
*disk
)
661 return le32_to_cpu(disk
->flags
);
664 static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key
*disk
,
667 disk
->flags
= cpu_to_le32(val
);
670 static inline u32
btrfs_disk_key_type(struct btrfs_disk_key
*key
)
672 return le32_to_cpu(key
->flags
) >> BTRFS_KEY_TYPE_SHIFT
;
675 static inline void btrfs_set_disk_key_type(struct btrfs_disk_key
*key
,
678 u32 flags
= btrfs_disk_key_flags(key
);
679 BUG_ON(val
>= BTRFS_KEY_TYPE_MAX
);
680 val
= val
<< BTRFS_KEY_TYPE_SHIFT
;
681 flags
= (flags
& ~BTRFS_KEY_TYPE_MASK
) | val
;
682 btrfs_set_disk_key_flags(key
, flags
);
685 static inline u32
btrfs_key_type(struct btrfs_key
*key
)
687 return key
->flags
>> BTRFS_KEY_TYPE_SHIFT
;
690 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u32 val
)
692 BUG_ON(val
>= BTRFS_KEY_TYPE_MAX
);
693 val
= val
<< BTRFS_KEY_TYPE_SHIFT
;
694 key
->flags
= (key
->flags
& ~(BTRFS_KEY_TYPE_MASK
)) | val
;
697 static inline u64
btrfs_header_blocknr(struct btrfs_header
*h
)
699 return le64_to_cpu(h
->blocknr
);
702 static inline void btrfs_set_header_blocknr(struct btrfs_header
*h
, u64 blocknr
)
704 h
->blocknr
= cpu_to_le64(blocknr
);
707 static inline u64
btrfs_header_generation(struct btrfs_header
*h
)
709 return le64_to_cpu(h
->generation
);
712 static inline void btrfs_set_header_generation(struct btrfs_header
*h
,
715 h
->generation
= cpu_to_le64(val
);
718 static inline u64
btrfs_header_owner(struct btrfs_header
*h
)
720 return le64_to_cpu(h
->owner
);
723 static inline void btrfs_set_header_owner(struct btrfs_header
*h
,
726 h
->owner
= cpu_to_le64(val
);
729 static inline u16
btrfs_header_nritems(struct btrfs_header
*h
)
731 return le16_to_cpu(h
->nritems
);
734 static inline void btrfs_set_header_nritems(struct btrfs_header
*h
, u16 val
)
736 h
->nritems
= cpu_to_le16(val
);
739 static inline u16
btrfs_header_flags(struct btrfs_header
*h
)
741 return le16_to_cpu(h
->flags
);
744 static inline void btrfs_set_header_flags(struct btrfs_header
*h
, u16 val
)
746 h
->flags
= cpu_to_le16(val
);
749 static inline int btrfs_header_level(struct btrfs_header
*h
)
754 static inline void btrfs_set_header_level(struct btrfs_header
*h
, int level
)
756 BUG_ON(level
> BTRFS_MAX_LEVEL
);
760 static inline int btrfs_is_leaf(struct btrfs_node
*n
)
762 return (btrfs_header_level(&n
->header
) == 0);
765 static inline u64
btrfs_root_blocknr(struct btrfs_root_item
*item
)
767 return le64_to_cpu(item
->blocknr
);
770 static inline void btrfs_set_root_blocknr(struct btrfs_root_item
*item
, u64 val
)
772 item
->blocknr
= cpu_to_le64(val
);
775 static inline u64
btrfs_root_dirid(struct btrfs_root_item
*item
)
777 return le64_to_cpu(item
->root_dirid
);
780 static inline void btrfs_set_root_dirid(struct btrfs_root_item
*item
, u64 val
)
782 item
->root_dirid
= cpu_to_le64(val
);
785 static inline u32
btrfs_root_refs(struct btrfs_root_item
*item
)
787 return le32_to_cpu(item
->refs
);
790 static inline void btrfs_set_root_refs(struct btrfs_root_item
*item
, u32 val
)
792 item
->refs
= cpu_to_le32(val
);
795 static inline u64
btrfs_super_blocknr(struct btrfs_super_block
*s
)
797 return le64_to_cpu(s
->blocknr
);
800 static inline void btrfs_set_super_blocknr(struct btrfs_super_block
*s
, u64 val
)
802 s
->blocknr
= cpu_to_le64(val
);
805 static inline u64
btrfs_super_generation(struct btrfs_super_block
*s
)
807 return le64_to_cpu(s
->generation
);
810 static inline void btrfs_set_super_generation(struct btrfs_super_block
*s
,
813 s
->generation
= cpu_to_le64(val
);
816 static inline u64
btrfs_super_root(struct btrfs_super_block
*s
)
818 return le64_to_cpu(s
->root
);
821 static inline void btrfs_set_super_root(struct btrfs_super_block
*s
, u64 val
)
823 s
->root
= cpu_to_le64(val
);
826 static inline u64
btrfs_super_total_blocks(struct btrfs_super_block
*s
)
828 return le64_to_cpu(s
->total_blocks
);
831 static inline void btrfs_set_super_total_blocks(struct btrfs_super_block
*s
,
834 s
->total_blocks
= cpu_to_le64(val
);
837 static inline u64
btrfs_super_blocks_used(struct btrfs_super_block
*s
)
839 return le64_to_cpu(s
->blocks_used
);
842 static inline void btrfs_set_super_blocks_used(struct btrfs_super_block
*s
,
845 s
->blocks_used
= cpu_to_le64(val
);
848 static inline u32
btrfs_super_blocksize(struct btrfs_super_block
*s
)
850 return le32_to_cpu(s
->blocksize
);
853 static inline void btrfs_set_super_blocksize(struct btrfs_super_block
*s
,
856 s
->blocksize
= cpu_to_le32(val
);
859 static inline u64
btrfs_super_root_dir(struct btrfs_super_block
*s
)
861 return le64_to_cpu(s
->root_dir_objectid
);
864 static inline void btrfs_set_super_root_dir(struct btrfs_super_block
*s
, u64
867 s
->root_dir_objectid
= cpu_to_le64(val
);
870 static inline u64
btrfs_super_last_device_id(struct btrfs_super_block
*s
)
872 return le64_to_cpu(s
->last_device_id
);
875 static inline void btrfs_set_super_last_device_id(struct btrfs_super_block
*s
,
878 s
->last_device_id
= cpu_to_le64(val
);
881 static inline u64
btrfs_super_device_id(struct btrfs_super_block
*s
)
883 return le64_to_cpu(s
->device_id
);
886 static inline void btrfs_set_super_device_id(struct btrfs_super_block
*s
,
889 s
->device_id
= cpu_to_le64(val
);
892 static inline u64
btrfs_super_device_block_start(struct btrfs_super_block
*s
)
894 return le64_to_cpu(s
->device_block_start
);
897 static inline void btrfs_set_super_device_block_start(struct btrfs_super_block
900 s
->device_block_start
= cpu_to_le64(val
);
903 static inline u64
btrfs_super_device_num_blocks(struct btrfs_super_block
*s
)
905 return le64_to_cpu(s
->device_num_blocks
);
908 static inline void btrfs_set_super_device_num_blocks(struct btrfs_super_block
911 s
->device_num_blocks
= cpu_to_le64(val
);
914 static inline u64
btrfs_super_device_root(struct btrfs_super_block
*s
)
916 return le64_to_cpu(s
->device_root
);
919 static inline void btrfs_set_super_device_root(struct btrfs_super_block
922 s
->device_root
= cpu_to_le64(val
);
926 static inline u8
*btrfs_leaf_data(struct btrfs_leaf
*l
)
928 return (u8
*)l
->items
;
931 static inline int btrfs_file_extent_type(struct btrfs_file_extent_item
*e
)
935 static inline void btrfs_set_file_extent_type(struct btrfs_file_extent_item
*e
,
941 static inline char *btrfs_file_extent_inline_start(struct
942 btrfs_file_extent_item
*e
)
944 return (char *)(&e
->disk_blocknr
);
947 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
949 return (unsigned long)(&((struct
950 btrfs_file_extent_item
*)NULL
)->disk_blocknr
) + datasize
;
953 static inline u32
btrfs_file_extent_inline_len(struct btrfs_item
*e
)
955 struct btrfs_file_extent_item
*fe
= NULL
;
956 return btrfs_item_size(e
) - (unsigned long)(&fe
->disk_blocknr
);
959 static inline u64
btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item
962 return le64_to_cpu(e
->disk_blocknr
);
965 static inline void btrfs_set_file_extent_disk_blocknr(struct
966 btrfs_file_extent_item
969 e
->disk_blocknr
= cpu_to_le64(val
);
972 static inline u64
btrfs_file_extent_generation(struct btrfs_file_extent_item
*e
)
974 return le64_to_cpu(e
->generation
);
977 static inline void btrfs_set_file_extent_generation(struct
978 btrfs_file_extent_item
*e
,
981 e
->generation
= cpu_to_le64(val
);
984 static inline u64
btrfs_file_extent_disk_num_blocks(struct
985 btrfs_file_extent_item
*e
)
987 return le64_to_cpu(e
->disk_num_blocks
);
990 static inline void btrfs_set_file_extent_disk_num_blocks(struct
991 btrfs_file_extent_item
994 e
->disk_num_blocks
= cpu_to_le64(val
);
997 static inline u64
btrfs_file_extent_offset(struct btrfs_file_extent_item
*e
)
999 return le64_to_cpu(e
->offset
);
1002 static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item
1005 e
->offset
= cpu_to_le64(val
);
1008 static inline u64
btrfs_file_extent_num_blocks(struct btrfs_file_extent_item
1011 return le64_to_cpu(e
->num_blocks
);
1014 static inline void btrfs_set_file_extent_num_blocks(struct
1015 btrfs_file_extent_item
*e
,
1018 e
->num_blocks
= cpu_to_le64(val
);
1021 static inline u16
btrfs_device_pathlen(struct btrfs_device_item
*d
)
1023 return le16_to_cpu(d
->pathlen
);
1026 static inline void btrfs_set_device_pathlen(struct btrfs_device_item
*d
,
1029 d
->pathlen
= cpu_to_le16(val
);
1032 static inline u64
btrfs_device_id(struct btrfs_device_item
*d
)
1034 return le64_to_cpu(d
->device_id
);
1037 static inline void btrfs_set_device_id(struct btrfs_device_item
*d
,
1040 d
->device_id
= cpu_to_le64(val
);
1043 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1045 return sb
->s_fs_info
;
1048 static inline void btrfs_check_bounds(void *vptr
, size_t len
,
1049 void *vcontainer
, size_t container_len
)
1052 char *container
= vcontainer
;
1053 WARN_ON(ptr
< container
);
1054 WARN_ON(ptr
+ len
> container
+ container_len
);
1057 static inline void btrfs_memcpy(struct btrfs_root
*root
,
1059 void *dst
, const void *src
, size_t nr
)
1061 btrfs_check_bounds(dst
, nr
, dst_block
, root
->fs_info
->sb
->s_blocksize
);
1062 memcpy(dst
, src
, nr
);
1065 static inline void btrfs_memmove(struct btrfs_root
*root
,
1067 void *dst
, void *src
, size_t nr
)
1069 btrfs_check_bounds(dst
, nr
, dst_block
, root
->fs_info
->sb
->s_blocksize
);
1070 memmove(dst
, src
, nr
);
1073 static inline void btrfs_mark_buffer_dirty(struct buffer_head
*bh
)
1075 WARN_ON(!atomic_read(&bh
->b_count
));
1076 mark_buffer_dirty(bh
);
1079 /* helper function to cast into the data area of the leaf. */
1080 #define btrfs_item_ptr(leaf, slot, type) \
1081 ((type *)(btrfs_leaf_data(leaf) + \
1082 btrfs_item_offset((leaf)->items + (slot))))
1085 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1086 struct btrfs_block_group_cache
1087 *hint
, u64 search_start
,
1088 int data
, int owner
);
1089 int btrfs_inc_root_ref(struct btrfs_trans_handle
*trans
,
1090 struct btrfs_root
*root
);
1091 struct buffer_head
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1092 struct btrfs_root
*root
, u64 hint
);
1093 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1094 struct btrfs_root
*root
, u64 owner
,
1095 u64 num_blocks
, u64 search_start
,
1096 u64 search_end
, struct btrfs_key
*ins
, int data
);
1097 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1098 struct buffer_head
*buf
);
1099 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1100 *root
, u64 blocknr
, u64 num_blocks
, int pin
);
1101 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
, struct
1103 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1104 struct btrfs_root
*root
,
1105 u64 blocknr
, u64 num_blocks
);
1106 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1107 struct btrfs_root
*root
);
1108 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1109 int btrfs_read_block_groups(struct btrfs_root
*root
);
1111 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1112 *root
, struct btrfs_path
*path
, u32 data_size
);
1113 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1114 struct btrfs_root
*root
,
1115 struct btrfs_path
*path
,
1117 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1118 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1120 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1121 struct btrfs_path
*btrfs_alloc_path(void);
1122 void btrfs_free_path(struct btrfs_path
*p
);
1123 void btrfs_init_path(struct btrfs_path
*p
);
1124 int btrfs_del_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1125 struct btrfs_path
*path
);
1126 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1127 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1128 int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1129 *root
, struct btrfs_path
*path
, struct btrfs_key
1130 *cpu_key
, u32 data_size
);
1131 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1132 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct btrfs_leaf
*leaf
);
1133 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1134 *root
, struct buffer_head
*snap
);
1136 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1137 struct btrfs_key
*key
);
1138 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1139 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1141 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1142 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1144 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1145 btrfs_root_item
*item
, struct btrfs_key
*key
);
1147 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1148 *root
, const char *name
, int name_len
, u64 dir
,
1149 struct btrfs_key
*location
, u8 type
);
1150 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1151 struct btrfs_root
*root
,
1152 struct btrfs_path
*path
, u64 dir
,
1153 const char *name
, int name_len
,
1155 struct btrfs_dir_item
*
1156 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1157 struct btrfs_root
*root
,
1158 struct btrfs_path
*path
, u64 dir
,
1159 u64 objectid
, const char *name
, int name_len
,
1161 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1162 struct btrfs_path
*path
,
1163 const char *name
, int name_len
);
1164 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1165 struct btrfs_root
*root
,
1166 struct btrfs_path
*path
,
1167 struct btrfs_dir_item
*di
);
1169 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1170 struct btrfs_root
*fs_root
,
1171 u64 dirid
, u64
*objectid
);
1172 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1175 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1176 *root
, u64 objectid
, struct btrfs_inode_item
1178 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1179 *root
, struct btrfs_path
*path
,
1180 struct btrfs_key
*location
, int mod
);
1183 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1184 struct btrfs_root
*root
,
1185 u64 objectid
, u64 pos
, u64 offset
,
1186 u64 disk_num_blocks
,
1188 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1189 struct btrfs_root
*root
,
1190 struct btrfs_path
*path
, u64 objectid
,
1191 u64 blocknr
, int mod
);
1192 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
1193 struct btrfs_root
*root
,
1194 u64 objectid
, u64 offset
,
1195 char *data
, size_t len
);
1196 int btrfs_csum_verify_file_block(struct btrfs_root
*root
,
1197 u64 objectid
, u64 offset
,
1198 char *data
, size_t len
);
1199 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1200 struct btrfs_root
*root
,
1201 struct btrfs_path
*path
,
1202 u64 objectid
, u64 offset
,
1204 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1205 struct btrfs_root
*root
, struct btrfs_path
*path
,