2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
23 #include "kerncompat.h"
24 #include "radix-tree.h"
25 #include "extent-cache.h"
27 struct btrfs_trans_handle
;
28 #define BTRFS_MAGIC "_B2RfS_M"
30 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
31 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
32 #define BTRFS_FS_TREE_OBJECTID 3ULL
33 #define BTRFS_ROOT_TREE_DIR_OBJECTID 4ULL
34 #define BTRFS_FIRST_FREE_OBJECTID 5ULL
37 * we can actually store much bigger names, but lets not confuse the rest
40 #define BTRFS_NAME_LEN 255
42 /* 32 bytes in various csum fields */
43 #define BTRFS_CSUM_SIZE 32
44 /* four bytes for CRC32 */
45 #define BTRFS_CRC32_SIZE 4
47 #define BTRFS_FT_UNKNOWN 0
48 #define BTRFS_FT_REG_FILE 1
49 #define BTRFS_FT_DIR 2
50 #define BTRFS_FT_CHRDEV 3
51 #define BTRFS_FT_BLKDEV 4
52 #define BTRFS_FT_FIFO 5
53 #define BTRFS_FT_SOCK 6
54 #define BTRFS_FT_SYMLINK 7
55 #define BTRFS_FT_XATTR 8
56 #define BTRFS_FT_MAX 9
59 * the key defines the order in the tree, and so it also defines (optimal)
60 * block layout. objectid corresonds to the inode number. The flags
61 * tells us things about the object, and is a kind of stream selector.
62 * so for a given inode, keys with flags of 1 might refer to the inode
63 * data, flags of 2 may point to file data in the btree and flags == 3
64 * may point to extents.
66 * offset is the starting byte offset for this key in the stream.
68 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
69 * in cpu native order. Otherwise they are identical and their sizes
70 * should be the same (ie both packed)
72 struct btrfs_disk_key
{
76 } __attribute__ ((__packed__
));
82 } __attribute__ ((__packed__
));
85 * every tree block (leaf or node) starts with this header.
88 u8 csum
[BTRFS_CSUM_SIZE
];
89 u8 fsid
[16]; /* FS specific uuid */
90 __le64 bytenr
; /* which block this node is supposed to live in */
96 } __attribute__ ((__packed__
));
98 #define BTRFS_MAX_LEVEL 8
99 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
100 sizeof(struct btrfs_header)) / \
101 sizeof(struct btrfs_key_ptr))
102 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
103 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
104 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
105 sizeof(struct btrfs_item) - \
106 sizeof(struct btrfs_file_extent_item))
109 * the super block basically lists the main trees of the FS
110 * it currently lacks any block count etc etc
112 struct btrfs_super_block
{
113 u8 csum
[BTRFS_CSUM_SIZE
];
114 /* the first 3 fields must match struct btrfs_header */
115 u8 fsid
[16]; /* FS specific uuid */
116 __le64 bytenr
; /* this block number */
122 __le64 root_dir_objectid
;
128 } __attribute__ ((__packed__
));
131 * A leaf is full of items. offset and size tell us where to find
132 * the item in the leaf (relative to the start of the data area)
135 struct btrfs_disk_key key
;
138 } __attribute__ ((__packed__
));
141 * leaves have an item area and a data area:
142 * [item0, item1....itemN] [free space] [dataN...data1, data0]
144 * The data is separate from the items to get the keys closer together
148 struct btrfs_header header
;
149 struct btrfs_item items
[];
150 } __attribute__ ((__packed__
));
153 * all non-leaf blocks are nodes, they hold only keys and pointers to
156 struct btrfs_key_ptr
{
157 struct btrfs_disk_key key
;
160 } __attribute__ ((__packed__
));
163 struct btrfs_header header
;
164 struct btrfs_key_ptr ptrs
[];
165 } __attribute__ ((__packed__
));
168 * btrfs_paths remember the path taken from the root down to the leaf.
169 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
170 * to any other levels that are present.
172 * The slots array records the index of the item or block pointer
173 * used while walking the tree.
176 struct btrfs_buffer
*nodes
[BTRFS_MAX_LEVEL
];
177 int slots
[BTRFS_MAX_LEVEL
];
181 * items in the extent btree are used to record the objectid of the
182 * owner of the block and the number of references
184 struct btrfs_extent_item
{
186 } __attribute__ ((__packed__
));
188 struct btrfs_extent_ref
{
193 } __attribute__ ((__packed__
));
195 struct btrfs_inode_timespec
{
198 } __attribute__ ((__packed__
));
201 * there is no padding here on purpose. If you want to extent the inode,
202 * make a new item type
204 struct btrfs_inode_item
{
216 struct btrfs_inode_timespec atime
;
217 struct btrfs_inode_timespec ctime
;
218 struct btrfs_inode_timespec mtime
;
219 struct btrfs_inode_timespec otime
;
220 } __attribute__ ((__packed__
));
222 /* inline data is just a blob of bytes */
223 struct btrfs_inline_data_item
{
225 } __attribute__ ((__packed__
));
227 struct btrfs_dir_item
{
228 struct btrfs_disk_key location
;
232 } __attribute__ ((__packed__
));
234 struct btrfs_root_item
{
235 struct btrfs_inode_item inode
;
242 struct btrfs_disk_key drop_progress
;
245 } __attribute__ ((__packed__
));
247 #define BTRFS_FILE_EXTENT_REG 0
248 #define BTRFS_FILE_EXTENT_INLINE 1
250 struct btrfs_file_extent_item
{
254 * disk space consumed by the extent, checksum blocks are included
258 __le64 disk_num_bytes
;
260 * the logical offset in file blocks (no csums)
261 * this extent record is for. This allows a file extent to point
262 * into the middle of an existing extent on disk, sharing it
263 * between two snapshots (useful if some bytes in the middle of the
264 * extent have changed
268 * the logical number of file blocks (no csums included)
271 } __attribute__ ((__packed__
));
273 struct btrfs_csum_item
{
274 u8 csum
[BTRFS_CSUM_SIZE
];
275 } __attribute__ ((__packed__
));
277 /* tag for the radix tree of block groups in ram */
278 #define BTRFS_BLOCK_GROUP_DIRTY 0
279 #define BTRFS_BLOCK_GROUP_SIZE (256 * 1024 * 1024)
282 #define BTRFS_BLOCK_GROUP_DATA 1
283 struct btrfs_block_group_item
{
286 } __attribute__ ((__packed__
));
288 struct btrfs_block_group_cache
{
289 struct cache_extent cache
;
290 struct btrfs_key key
;
291 struct btrfs_block_group_item item
;
295 struct btrfs_fs_info
{
296 struct btrfs_root
*fs_root
;
297 struct btrfs_root
*extent_root
;
298 struct btrfs_root
*tree_root
;
299 struct btrfs_key last_insert
;
300 struct cache_tree extent_cache
;
301 struct cache_tree block_group_cache
;
302 struct cache_tree pending_tree
;
303 struct cache_tree pinned_tree
;
304 struct cache_tree del_pending
;
305 struct list_head trans
;
306 struct list_head cache
;
307 u64 last_inode_alloc
;
308 u64 last_inode_alloc_dirid
;
312 struct btrfs_trans_handle
*running_transaction
;
313 struct btrfs_super_block
*disk_super
;
317 * in ram representation of the tree. extent_root is used for all allocations
318 * and for the extent tree extent_root root.
321 struct btrfs_buffer
*node
;
322 struct btrfs_buffer
*commit_root
;
323 struct btrfs_root_item root_item
;
324 struct btrfs_key root_key
;
325 struct btrfs_fs_info
*fs_info
;
327 /* data allocations are done in sectorsize units */
330 /* node allocations are done in nodesize units */
333 /* leaf allocations are done in leafsize units */
336 /* leaf allocations are done in leafsize units */
343 /* the lower bits in the key flags defines the item type */
344 #define BTRFS_KEY_TYPE_MAX 256
345 #define BTRFS_KEY_TYPE_SHIFT 24
346 #define BTRFS_KEY_TYPE_MASK (((u32)BTRFS_KEY_TYPE_MAX - 1) << \
347 BTRFS_KEY_TYPE_SHIFT)
350 * inode items have the data typically returned from stat and store other
351 * info about object characteristics. There is one for every file and dir in
354 #define BTRFS_INODE_ITEM_KEY 1
355 #define BTRFS_XATTR_ITEM_KEY 2
357 /* reserve 3-15 close to the inode for later flexibility */
360 * dir items are the name -> inode pointers in a directory. There is one
361 * for every name in a directory.
363 #define BTRFS_DIR_ITEM_KEY 16
364 #define BTRFS_DIR_INDEX_KEY 17
366 * extent data is for file data
368 #define BTRFS_EXTENT_DATA_KEY 18
370 * csum items have the checksums for data in the extents
372 #define BTRFS_CSUM_ITEM_KEY 19
374 /* reserve 20-31 for other file stuff */
377 * root items point to tree roots. There are typically in the root
378 * tree used by the super block to find all the other trees
380 #define BTRFS_ROOT_ITEM_KEY 32
382 * extent items are in the extent map tree. These record which blocks
383 * are used, and how many references there are to each block
385 #define BTRFS_EXTENT_ITEM_KEY 33
386 #define BTRFS_EXTENT_REF_KEY 34
389 * block groups give us hints into the extent allocation trees. Which
390 * blocks are free etc etc
392 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
395 * string items are for debugging. They just store a short string of
398 #define BTRFS_STRING_ITEM_KEY 253
400 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
401 static inline u##bits btrfs_##name(type *s) \
403 return le##bits##_to_cpu(s->member); \
405 static inline void btrfs_set_##name(type *s, u##bits val) \
407 s->member = cpu_to_le##bits(val); \
410 static inline u64
btrfs_block_group_used(struct btrfs_block_group_item
*bi
)
412 return le64_to_cpu(bi
->used
);
415 static inline void btrfs_set_block_group_used(struct
416 btrfs_block_group_item
*bi
,
419 bi
->used
= cpu_to_le64(val
);
422 static inline u64
btrfs_inode_generation(struct btrfs_inode_item
*i
)
424 return le64_to_cpu(i
->generation
);
427 static inline void btrfs_set_inode_generation(struct btrfs_inode_item
*i
,
430 i
->generation
= cpu_to_le64(val
);
433 static inline u64
btrfs_inode_size(struct btrfs_inode_item
*i
)
435 return le64_to_cpu(i
->size
);
438 static inline void btrfs_set_inode_size(struct btrfs_inode_item
*i
, u64 val
)
440 i
->size
= cpu_to_le64(val
);
443 static inline u64
btrfs_inode_nblocks(struct btrfs_inode_item
*i
)
445 return le64_to_cpu(i
->nblocks
);
448 static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item
*i
, u64 val
)
450 i
->nblocks
= cpu_to_le64(val
);
453 static inline u64
btrfs_inode_block_group(struct btrfs_inode_item
*i
)
455 return le64_to_cpu(i
->block_group
);
458 static inline void btrfs_set_inode_block_group(struct btrfs_inode_item
*i
,
461 i
->block_group
= cpu_to_le64(val
);
464 static inline u32
btrfs_inode_nlink(struct btrfs_inode_item
*i
)
466 return le32_to_cpu(i
->nlink
);
469 static inline void btrfs_set_inode_nlink(struct btrfs_inode_item
*i
, u32 val
)
471 i
->nlink
= cpu_to_le32(val
);
474 static inline u32
btrfs_inode_uid(struct btrfs_inode_item
*i
)
476 return le32_to_cpu(i
->uid
);
479 static inline void btrfs_set_inode_uid(struct btrfs_inode_item
*i
, u32 val
)
481 i
->uid
= cpu_to_le32(val
);
484 static inline u32
btrfs_inode_gid(struct btrfs_inode_item
*i
)
486 return le32_to_cpu(i
->gid
);
489 static inline void btrfs_set_inode_gid(struct btrfs_inode_item
*i
, u32 val
)
491 i
->gid
= cpu_to_le32(val
);
494 static inline u32
btrfs_inode_mode(struct btrfs_inode_item
*i
)
496 return le32_to_cpu(i
->mode
);
499 static inline void btrfs_set_inode_mode(struct btrfs_inode_item
*i
, u32 val
)
501 i
->mode
= cpu_to_le32(val
);
504 static inline u32
btrfs_inode_rdev(struct btrfs_inode_item
*i
)
506 return le32_to_cpu(i
->rdev
);
509 static inline void btrfs_set_inode_rdev(struct btrfs_inode_item
*i
, u32 val
)
511 i
->rdev
= cpu_to_le32(val
);
514 static inline u16
btrfs_inode_flags(struct btrfs_inode_item
*i
)
516 return le16_to_cpu(i
->flags
);
519 static inline void btrfs_set_inode_flags(struct btrfs_inode_item
*i
, u16 val
)
521 i
->flags
= cpu_to_le16(val
);
524 static inline u16
btrfs_inode_compat_flags(struct btrfs_inode_item
*i
)
526 return le16_to_cpu(i
->compat_flags
);
529 static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item
*i
,
532 i
->compat_flags
= cpu_to_le16(val
);
535 static inline u64
btrfs_timespec_sec(struct btrfs_inode_timespec
*ts
)
537 return le64_to_cpu(ts
->sec
);
540 static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec
*ts
,
543 ts
->sec
= cpu_to_le64(val
);
546 static inline u32
btrfs_timespec_nsec(struct btrfs_inode_timespec
*ts
)
548 return le32_to_cpu(ts
->nsec
);
551 static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec
*ts
,
554 ts
->nsec
= cpu_to_le32(val
);
557 BTRFS_SETGET_STACK_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
559 BTRFS_SETGET_STACK_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
560 BTRFS_SETGET_STACK_FUNCS(ref_generation
, struct btrfs_extent_ref
,
562 BTRFS_SETGET_STACK_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
563 BTRFS_SETGET_STACK_FUNCS(ref_offset
, struct btrfs_extent_ref
, offset
, 64);
565 static inline u64
btrfs_node_blockptr(struct btrfs_node
*n
, int nr
)
567 return le64_to_cpu(n
->ptrs
[nr
].blockptr
);
570 static inline void btrfs_set_node_blockptr(struct btrfs_node
*n
, int nr
,
573 n
->ptrs
[nr
].blockptr
= cpu_to_le64(val
);
576 static inline u64
btrfs_node_ptr_generation(struct btrfs_node
*n
, int nr
)
578 return le64_to_cpu(n
->ptrs
[nr
].generation
);
581 static inline void btrfs_set_node_ptr_generation(struct btrfs_node
*n
, int nr
,
584 n
->ptrs
[nr
].generation
= cpu_to_le64(val
);
587 static inline u32
btrfs_item_offset(struct btrfs_item
*item
)
589 return le32_to_cpu(item
->offset
);
592 static inline void btrfs_set_item_offset(struct btrfs_item
*item
, u32 val
)
594 item
->offset
= cpu_to_le32(val
);
597 static inline u32
btrfs_item_end(struct btrfs_item
*item
)
599 return le32_to_cpu(item
->offset
) + le32_to_cpu(item
->size
);
602 static inline u32
btrfs_item_size(struct btrfs_item
*item
)
604 return le32_to_cpu(item
->size
);
607 static inline void btrfs_set_item_size(struct btrfs_item
*item
, u32 val
)
609 item
->size
= cpu_to_le32(val
);
612 static inline u8
btrfs_dir_type(struct btrfs_dir_item
*d
)
617 static inline void btrfs_set_dir_type(struct btrfs_dir_item
*d
, u8 val
)
622 static inline u16
btrfs_dir_name_len(struct btrfs_dir_item
*d
)
624 return le16_to_cpu(d
->name_len
);
627 static inline void btrfs_set_dir_name_len(struct btrfs_dir_item
*d
, u16 val
)
629 d
->name_len
= cpu_to_le16(val
);
632 static inline u16
btrfs_dir_data_len(struct btrfs_dir_item
*d
)
634 return le16_to_cpu(d
->data_len
);
637 static inline void btrfs_set_dir_data_len(struct btrfs_dir_item
*d
, u16 val
)
639 d
->data_len
= cpu_to_le16(val
);
642 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
643 struct btrfs_disk_key
*disk
)
645 cpu
->offset
= le64_to_cpu(disk
->offset
);
646 cpu
->type
= le32_to_cpu(disk
->type
);
647 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
650 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
651 struct btrfs_key
*cpu
)
653 disk
->offset
= cpu_to_le64(cpu
->offset
);
654 disk
->type
= cpu_to_le32(cpu
->type
);
655 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
658 static inline u64
btrfs_disk_key_objectid(struct btrfs_disk_key
*disk
)
660 return le64_to_cpu(disk
->objectid
);
663 static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key
*disk
,
666 disk
->objectid
= cpu_to_le64(val
);
669 static inline u64
btrfs_disk_key_offset(struct btrfs_disk_key
*disk
)
671 return le64_to_cpu(disk
->offset
);
674 static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key
*disk
,
677 disk
->offset
= cpu_to_le64(val
);
680 static inline u8
btrfs_disk_key_type(struct btrfs_disk_key
*key
)
685 static inline void btrfs_set_disk_key_type(struct btrfs_disk_key
*key
, u8 val
)
690 static inline u32
btrfs_key_type(struct btrfs_key
*key
)
695 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u32 val
)
700 static inline u64
btrfs_header_bytenr(struct btrfs_header
*h
)
702 return le64_to_cpu(h
->bytenr
);
705 static inline void btrfs_set_header_bytenr(struct btrfs_header
*h
, u64 bytenr
)
707 h
->bytenr
= cpu_to_le64(bytenr
);
710 static inline u64
btrfs_header_generation(struct btrfs_header
*h
)
712 return le64_to_cpu(h
->generation
);
715 static inline void btrfs_set_header_generation(struct btrfs_header
*h
,
718 h
->generation
= cpu_to_le64(val
);
721 static inline u64
btrfs_header_owner(struct btrfs_header
*h
)
723 return le64_to_cpu(h
->owner
);
726 static inline void btrfs_set_header_owner(struct btrfs_header
*h
,
729 h
->owner
= cpu_to_le64(val
);
732 static inline u32
btrfs_header_nritems(struct btrfs_header
*h
)
734 return le32_to_cpu(h
->nritems
);
737 static inline void btrfs_set_header_nritems(struct btrfs_header
*h
, u32 val
)
739 h
->nritems
= cpu_to_le32(val
);
742 static inline u16
btrfs_header_flags(struct btrfs_header
*h
)
744 return le16_to_cpu(h
->flags
);
747 static inline void btrfs_set_header_flags(struct btrfs_header
*h
, u16 val
)
749 h
->flags
= cpu_to_le16(val
);
752 static inline int btrfs_header_level(struct btrfs_header
*h
)
757 static inline void btrfs_set_header_level(struct btrfs_header
*h
, int level
)
759 BUG_ON(level
> BTRFS_MAX_LEVEL
);
763 static inline int btrfs_is_leaf(struct btrfs_node
*n
)
765 return (btrfs_header_level(&n
->header
) == 0);
768 static inline u64
btrfs_root_bytenr(struct btrfs_root_item
*item
)
770 return le64_to_cpu(item
->bytenr
);
773 static inline void btrfs_set_root_bytenr(struct btrfs_root_item
*item
, u64 val
)
775 item
->bytenr
= cpu_to_le64(val
);
778 static inline u64
btrfs_root_byte_limit(struct btrfs_root_item
*item
)
780 return le64_to_cpu(item
->byte_limit
);
783 static inline void btrfs_set_root_byte_limit(struct btrfs_root_item
*item
,
786 item
->byte_limit
= cpu_to_le64(val
);
789 static inline u8
btrfs_root_level(struct btrfs_root_item
*item
)
794 static inline void btrfs_set_root_level(struct btrfs_root_item
*item
, u8 val
)
799 static inline u64
btrfs_root_dirid(struct btrfs_root_item
*item
)
801 return le64_to_cpu(item
->root_dirid
);
804 static inline void btrfs_set_root_dirid(struct btrfs_root_item
*item
, u64 val
)
806 item
->root_dirid
= cpu_to_le64(val
);
809 static inline u32
btrfs_root_refs(struct btrfs_root_item
*item
)
811 return le32_to_cpu(item
->refs
);
814 static inline void btrfs_set_root_refs(struct btrfs_root_item
*item
, u32 val
)
816 item
->refs
= cpu_to_le32(val
);
819 static inline u32
btrfs_root_flags(struct btrfs_root_item
*item
)
821 return le32_to_cpu(item
->flags
);
824 static inline void btrfs_set_root_flags(struct btrfs_root_item
*item
, u32 val
)
826 item
->flags
= cpu_to_le32(val
);
829 static inline void btrfs_set_root_bytes_used(struct btrfs_root_item
*item
,
832 item
->bytes_used
= cpu_to_le64(val
);
835 static inline u64
btrfs_root_bytes_used(struct btrfs_root_item
*item
)
837 return le64_to_cpu(item
->bytes_used
);
840 static inline u64
btrfs_super_bytenr(struct btrfs_super_block
*s
)
842 return le64_to_cpu(s
->bytenr
);
845 static inline void btrfs_set_super_bytenr(struct btrfs_super_block
*s
, u64 val
)
847 s
->bytenr
= cpu_to_le64(val
);
850 static inline u64
btrfs_super_generation(struct btrfs_super_block
*s
)
852 return le64_to_cpu(s
->generation
);
855 static inline void btrfs_set_super_generation(struct btrfs_super_block
*s
,
858 s
->generation
= cpu_to_le64(val
);
861 static inline u8
btrfs_super_root_level(struct btrfs_super_block
*s
)
863 return s
->root_level
;
866 static inline void btrfs_set_super_root_level(struct btrfs_super_block
*s
,
872 static inline u64
btrfs_super_root(struct btrfs_super_block
*s
)
874 return le64_to_cpu(s
->root
);
877 static inline void btrfs_set_super_root(struct btrfs_super_block
*s
, u64 val
)
879 s
->root
= cpu_to_le64(val
);
882 static inline u64
btrfs_super_total_bytes(struct btrfs_super_block
*s
)
884 return le64_to_cpu(s
->total_bytes
);
887 static inline void btrfs_set_super_total_bytes(struct btrfs_super_block
*s
,
890 s
->total_bytes
= cpu_to_le64(val
);
893 static inline u64
btrfs_super_bytes_used(struct btrfs_super_block
*s
)
895 return le64_to_cpu(s
->bytes_used
);
898 static inline void btrfs_set_super_bytes_used(struct btrfs_super_block
*s
,
901 s
->bytes_used
= cpu_to_le64(val
);
904 static inline u32
btrfs_super_sectorsize(struct btrfs_super_block
*s
)
906 return le32_to_cpu(s
->sectorsize
);
909 static inline void btrfs_set_super_sectorsize(struct btrfs_super_block
*s
,
912 s
->sectorsize
= cpu_to_le32(val
);
915 static inline u32
btrfs_super_nodesize(struct btrfs_super_block
*s
)
917 return le32_to_cpu(s
->nodesize
);
920 static inline void btrfs_set_super_nodesize(struct btrfs_super_block
*s
,
923 s
->nodesize
= cpu_to_le32(val
);
926 static inline u32
btrfs_super_leafsize(struct btrfs_super_block
*s
)
928 return le32_to_cpu(s
->leafsize
);
931 static inline void btrfs_set_super_leafsize(struct btrfs_super_block
*s
,
934 s
->leafsize
= cpu_to_le32(val
);
937 static inline u32
btrfs_super_stripesize(struct btrfs_super_block
*s
)
939 return le32_to_cpu(s
->stripesize
);
942 static inline void btrfs_set_super_stripesize(struct btrfs_super_block
*s
,
945 s
->stripesize
= cpu_to_le32(val
);
948 static inline u64
btrfs_super_root_dir(struct btrfs_super_block
*s
)
950 return le64_to_cpu(s
->root_dir_objectid
);
953 static inline void btrfs_set_super_root_dir(struct btrfs_super_block
*s
, u64
956 s
->root_dir_objectid
= cpu_to_le64(val
);
959 static inline u8
*btrfs_leaf_data(struct btrfs_leaf
*l
)
961 return (u8
*)l
->items
;
964 static inline int btrfs_file_extent_type(struct btrfs_file_extent_item
*e
)
968 static inline void btrfs_set_file_extent_type(struct btrfs_file_extent_item
*e
,
974 static inline char *btrfs_file_extent_inline_start(struct
975 btrfs_file_extent_item
*e
)
977 return (char *)(&e
->disk_bytenr
);
980 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
982 return (unsigned long)(&((struct
983 btrfs_file_extent_item
*)NULL
)->disk_bytenr
) + datasize
;
986 static inline u32
btrfs_file_extent_inline_len(struct btrfs_item
*e
)
988 struct btrfs_file_extent_item
*fe
= NULL
;
989 return btrfs_item_size(e
) - (unsigned long)(&fe
->disk_bytenr
);
992 static inline u64
btrfs_file_extent_disk_bytenr(struct btrfs_file_extent_item
995 return le64_to_cpu(e
->disk_bytenr
);
998 static inline void btrfs_set_file_extent_disk_bytenr(struct
999 btrfs_file_extent_item
1002 e
->disk_bytenr
= cpu_to_le64(val
);
1005 static inline u64
btrfs_file_extent_generation(struct btrfs_file_extent_item
*e
)
1007 return le64_to_cpu(e
->generation
);
1010 static inline void btrfs_set_file_extent_generation(struct
1011 btrfs_file_extent_item
*e
,
1014 e
->generation
= cpu_to_le64(val
);
1017 static inline u64
btrfs_file_extent_disk_num_bytes(struct
1018 btrfs_file_extent_item
*e
)
1020 return le64_to_cpu(e
->disk_num_bytes
);
1023 static inline void btrfs_set_file_extent_disk_num_bytes(struct
1024 btrfs_file_extent_item
1027 e
->disk_num_bytes
= cpu_to_le64(val
);
1030 static inline u64
btrfs_file_extent_offset(struct btrfs_file_extent_item
*e
)
1032 return le64_to_cpu(e
->offset
);
1035 static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item
1038 e
->offset
= cpu_to_le64(val
);
1041 static inline u64
btrfs_file_extent_num_bytes(struct btrfs_file_extent_item
1044 return le64_to_cpu(e
->num_bytes
);
1047 static inline void btrfs_set_file_extent_num_bytes(struct
1048 btrfs_file_extent_item
*e
,
1051 e
->num_bytes
= cpu_to_le64(val
);
1054 /* helper function to cast into the data area of the leaf. */
1055 #define btrfs_item_ptr(leaf, slot, type) \
1056 ((type *)(btrfs_leaf_data(leaf) + \
1057 btrfs_item_offset((leaf)->items + (slot))))
1058 #define btrfs_item_ptr_offset(leaf, slot) \
1059 ((unsigned long)(btrfs_leaf_data(leaf) + \
1060 btrfs_item_offset_nr(leaf, slot)))
1062 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
1065 return root
->leafsize
;
1066 return root
->nodesize
;
1068 int btrfs_comp_keys(struct btrfs_disk_key
*disk
, struct btrfs_key
*k2
);
1069 struct btrfs_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1070 struct btrfs_root
*root
,
1072 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1073 struct btrfs_buffer
*buf
);
1074 int btrfs_inc_root_ref(struct btrfs_trans_handle
*trans
,
1075 struct btrfs_root
*root
, u64 owner_objectid
);
1076 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1077 *root
, u64 bytenr
, u64 num_bytes
,
1078 u64 root_objectid
, u64 root_generation
,
1079 u64 owner
, u64 owner_offset
, int pin
);
1080 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1081 struct btrfs_root
*root
, struct btrfs_buffer
*buf
,
1082 struct btrfs_buffer
*parent
, int parent_slot
,
1083 struct btrfs_buffer
**cow_ret
);
1084 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1085 *root
, struct btrfs_path
*path
, u32 data_size
);
1086 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1087 struct btrfs_root
*root
,
1088 struct btrfs_path
*path
,
1089 u32 new_size
, int from_end
);
1090 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1091 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1093 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1094 void btrfs_init_path(struct btrfs_path
*p
);
1095 int btrfs_del_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1096 struct btrfs_path
*path
);
1097 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1098 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1099 int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1100 *root
, struct btrfs_path
*path
, struct btrfs_key
1101 *cpu_key
, u32 data_size
);
1102 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1103 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct btrfs_leaf
*leaf
);
1104 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1105 *root
, struct btrfs_buffer
*snap
);
1106 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
, struct
1108 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1109 struct btrfs_key
*key
);
1110 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1111 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1113 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1114 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1116 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1117 btrfs_root_item
*item
, struct btrfs_key
*key
);
1118 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1119 *root
, char *name
, int name_len
, u64 dir
,
1120 struct btrfs_key
*location
, u8 type
);
1121 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1122 struct btrfs_root
*root
, struct btrfs_path
*path
,
1123 u64 dir
, char *name
, int name_len
, int mod
);
1124 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1125 struct btrfs_path
*path
,
1126 const char *name
, int name_len
);
1127 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1128 struct btrfs_root
*root
,
1129 struct btrfs_path
*path
,
1130 struct btrfs_dir_item
*di
);
1131 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1132 struct btrfs_root
*fs_root
,
1133 u64 dirid
, u64
*objectid
);
1134 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1135 *root
, u64 objectid
, struct btrfs_inode_item
1137 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1138 *root
, struct btrfs_path
*path
, u64 objectid
, int mod
);
1139 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1140 struct btrfs_root
*root
);
1141 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1142 int btrfs_read_block_groups(struct btrfs_root
*root
);
1143 int btrfs_insert_block_group(struct btrfs_trans_handle
*trans
,
1144 struct btrfs_root
*root
,
1145 struct btrfs_key
*key
,
1146 struct btrfs_block_group_item
*bi
);
1148 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1149 struct btrfs_root
*root
,
1150 u64 objectid
, u64 pos
, u64 offset
,
1151 u64 disk_num_bytes
, u64 num_bytes
);
1152 int btrfs_insert_inline_file_extent(struct btrfs_trans_handle
*trans
,
1153 struct btrfs_root
*root
, u64 objectid
,
1154 u64 offset
, char *buffer
, size_t size
);
1155 int btrfs_lookup_csum(struct btrfs_trans_handle
*trans
, struct btrfs_root
1156 *root
, struct btrfs_path
*path
, u64 objectid
,
1157 u64 offset
, int cow
, struct btrfs_csum_item
**item_ret
);
1158 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
, struct btrfs_root
1159 *root
, struct btrfs_inode_item
*inode
,
1160 u64 objectid
, u64 offset
, char *data
, size_t len
);