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"
26 #include "extent_io.h"
29 struct btrfs_trans_handle
;
30 #define BTRFS_MAGIC "_B5RfS_M"
32 #define BTRFS_MAX_LEVEL 8
34 /* holds pointers to all of the tree roots */
35 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
37 /* stores information about which extents are in use, and reference counts */
38 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
41 * chunk tree stores translations from logical -> physical block numbering
42 * the super block points to the chunk tree
44 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
47 * stores information about which areas of a given device are in use.
48 * one per device. The tree of tree roots points to the device tree
50 #define BTRFS_DEV_TREE_OBJECTID 4ULL
52 /* one per subvolume, storing files and directories */
53 #define BTRFS_FS_TREE_OBJECTID 5ULL
55 /* directory objectid inside the root tree */
56 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
59 * All files have objectids higher than this.
61 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
62 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
66 * the device items go into the chunk tree. The key is in the form
67 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
69 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
72 * we can actually store much bigger names, but lets not confuse the rest
75 #define BTRFS_NAME_LEN 255
77 /* 32 bytes in various csum fields */
78 #define BTRFS_CSUM_SIZE 32
79 /* four bytes for CRC32 */
80 #define BTRFS_CRC32_SIZE 4
81 #define BTRFS_EMPTY_DIR_SIZE 0
83 #define BTRFS_FT_UNKNOWN 0
84 #define BTRFS_FT_REG_FILE 1
85 #define BTRFS_FT_DIR 2
86 #define BTRFS_FT_CHRDEV 3
87 #define BTRFS_FT_BLKDEV 4
88 #define BTRFS_FT_FIFO 5
89 #define BTRFS_FT_SOCK 6
90 #define BTRFS_FT_SYMLINK 7
91 #define BTRFS_FT_XATTR 8
92 #define BTRFS_FT_MAX 9
95 * the key defines the order in the tree, and so it also defines (optimal)
96 * block layout. objectid corresonds to the inode number. The flags
97 * tells us things about the object, and is a kind of stream selector.
98 * so for a given inode, keys with flags of 1 might refer to the inode
99 * data, flags of 2 may point to file data in the btree and flags == 3
100 * may point to extents.
102 * offset is the starting byte offset for this key in the stream.
104 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
105 * in cpu native order. Otherwise they are identical and their sizes
106 * should be the same (ie both packed)
108 struct btrfs_disk_key
{
112 } __attribute__ ((__packed__
));
118 } __attribute__ ((__packed__
));
120 struct btrfs_mapping_tree
{
121 struct cache_tree cache_tree
;
124 #define BTRFS_UUID_SIZE 16
125 struct btrfs_dev_item
{
126 /* the internal btrfs device id */
129 /* size of the device */
135 /* optimal io alignment for this device */
138 /* optimal io width for this device */
141 /* minimal io size for this device */
144 /* type and info about this device */
147 /* grouping information for allocation decisions */
150 /* seek speed 0-100 where 100 is fastest */
153 /* bandwidth 0-100 where 100 is fastest */
156 /* btrfs generated uuid for this device */
157 u8 uuid
[BTRFS_UUID_SIZE
];
158 } __attribute__ ((__packed__
));
160 struct btrfs_stripe
{
163 u8 dev_uuid
[BTRFS_UUID_SIZE
];
164 } __attribute__ ((__packed__
));
167 /* size of this chunk in bytes */
170 /* objectid of the root referencing this chunk */
176 /* optimal io alignment for this chunk */
179 /* optimal io width for this chunk */
182 /* minimal io size for this chunk */
185 /* 2^16 stripes is quite a lot, a second limit is the size of a single
189 struct btrfs_stripe stripe
;
190 /* additional stripes go here */
191 } __attribute__ ((__packed__
));
193 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
195 BUG_ON(num_stripes
== 0);
196 return sizeof(struct btrfs_chunk
) +
197 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
200 #define BTRFS_FSID_SIZE 16
201 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
204 * every tree block (leaf or node) starts with this header.
206 struct btrfs_header
{
207 /* these first four must match the super block */
208 u8 csum
[BTRFS_CSUM_SIZE
];
209 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
210 __le64 bytenr
; /* which block this node is supposed to live in */
213 /* allowed to be different from the super from here on down */
214 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
219 } __attribute__ ((__packed__
));
221 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
222 sizeof(struct btrfs_header)) / \
223 sizeof(struct btrfs_key_ptr))
224 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
225 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
226 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
227 sizeof(struct btrfs_item) - \
228 sizeof(struct btrfs_file_extent_item))
231 * this is a very generous portion of the super block, giving us
232 * room to translate 14 chunks with 3 stripes each.
234 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
237 * the super block basically lists the main trees of the FS
238 * it currently lacks any block count etc etc
240 struct btrfs_super_block
{
241 u8 csum
[BTRFS_CSUM_SIZE
];
242 /* the first 3 fields must match struct btrfs_header */
243 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
244 __le64 bytenr
; /* this block number */
247 /* allowed to be different from the btrfs_header from here own down */
254 __le64 root_dir_objectid
;
260 __le32 sys_chunk_array_size
;
263 struct btrfs_dev_item dev_item
;
264 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
265 } __attribute__ ((__packed__
));
268 * A leaf is full of items. offset and size tell us where to find
269 * the item in the leaf (relative to the start of the data area)
272 struct btrfs_disk_key key
;
275 } __attribute__ ((__packed__
));
278 * leaves have an item area and a data area:
279 * [item0, item1....itemN] [free space] [dataN...data1, data0]
281 * The data is separate from the items to get the keys closer together
285 struct btrfs_header header
;
286 struct btrfs_item items
[];
287 } __attribute__ ((__packed__
));
290 * all non-leaf blocks are nodes, they hold only keys and pointers to
293 struct btrfs_key_ptr
{
294 struct btrfs_disk_key key
;
297 } __attribute__ ((__packed__
));
300 struct btrfs_header header
;
301 struct btrfs_key_ptr ptrs
[];
302 } __attribute__ ((__packed__
));
305 * btrfs_paths remember the path taken from the root down to the leaf.
306 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
307 * to any other levels that are present.
309 * The slots array records the index of the item or block pointer
310 * used while walking the tree.
313 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
314 int slots
[BTRFS_MAX_LEVEL
];
320 * items in the extent btree are used to record the objectid of the
321 * owner of the block and the number of references
323 struct btrfs_extent_item
{
325 } __attribute__ ((__packed__
));
327 struct btrfs_extent_ref
{
332 } __attribute__ ((__packed__
));
334 /* dev extents record free space on individual devices. The owner
335 * field points back to the chunk allocation mapping tree that allocated
336 * the extent. The chunk tree uuid field is a way to double check the owner
338 struct btrfs_dev_extent
{
340 __le64 chunk_objectid
;
343 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
344 } __attribute__ ((__packed__
));
346 struct btrfs_inode_ref
{
349 } __attribute__ ((__packed__
));
351 struct btrfs_timespec
{
354 } __attribute__ ((__packed__
));
357 * there is no padding here on purpose. If you want to extent the inode,
358 * make a new item type
360 struct btrfs_inode_item
{
372 struct btrfs_timespec atime
;
373 struct btrfs_timespec ctime
;
374 struct btrfs_timespec mtime
;
375 struct btrfs_timespec otime
;
376 } __attribute__ ((__packed__
));
378 struct btrfs_dir_item
{
379 struct btrfs_disk_key location
;
383 } __attribute__ ((__packed__
));
385 struct btrfs_root_item
{
386 struct btrfs_inode_item inode
;
393 struct btrfs_disk_key drop_progress
;
396 } __attribute__ ((__packed__
));
398 #define BTRFS_FILE_EXTENT_REG 0
399 #define BTRFS_FILE_EXTENT_INLINE 1
401 struct btrfs_file_extent_item
{
405 * disk space consumed by the extent, checksum blocks are included
409 __le64 disk_num_bytes
;
411 * the logical offset in file blocks (no csums)
412 * this extent record is for. This allows a file extent to point
413 * into the middle of an existing extent on disk, sharing it
414 * between two snapshots (useful if some bytes in the middle of the
415 * extent have changed
419 * the logical number of file blocks (no csums included)
422 } __attribute__ ((__packed__
));
424 struct btrfs_csum_item
{
426 } __attribute__ ((__packed__
));
428 /* tag for the radix tree of block groups in ram */
429 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
430 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
431 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
432 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
433 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
434 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
436 struct btrfs_block_group_item
{
438 __le64 chunk_objectid
;
440 } __attribute__ ((__packed__
));
442 struct btrfs_space_info
{
448 struct list_head list
;
451 struct btrfs_block_group_cache
{
452 struct cache_extent cache
;
453 struct btrfs_key key
;
454 struct btrfs_block_group_item item
;
455 struct btrfs_space_info
*space_info
;
461 struct btrfs_extent_ops
{
462 int (*alloc_extent
)(struct btrfs_root
*root
, u64 num_bytes
,
463 u64 hint_byte
, struct btrfs_key
*ins
);
464 int (*free_extent
)(struct btrfs_root
*root
, u64 bytenr
,
469 struct btrfs_fs_devices
;
470 struct btrfs_fs_info
{
471 u8 fsid
[BTRFS_FSID_SIZE
];
472 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
473 struct btrfs_root
*fs_root
;
474 struct btrfs_root
*extent_root
;
475 struct btrfs_root
*tree_root
;
476 struct btrfs_root
*chunk_root
;
477 struct btrfs_root
*dev_root
;
479 struct extent_io_tree extent_cache
;
480 struct extent_io_tree free_space_cache
;
481 struct extent_io_tree block_group_cache
;
482 struct extent_io_tree pinned_extents
;
483 struct extent_io_tree pending_del
;
484 struct extent_io_tree extent_ins
;
486 /* logical->physical extent mapping */
487 struct btrfs_mapping_tree mapping_tree
;
490 u64 last_trans_committed
;
492 u64 avail_data_alloc_bits
;
493 u64 avail_metadata_alloc_bits
;
494 u64 avail_system_alloc_bits
;
495 u64 data_alloc_profile
;
496 u64 metadata_alloc_profile
;
497 u64 system_alloc_profile
;
499 struct btrfs_trans_handle
*running_transaction
;
500 struct btrfs_super_block super_copy
;
501 struct extent_buffer
*sb_buffer
;
502 struct mutex fs_mutex
;
505 struct btrfs_extent_ops
*extent_ops
;
506 struct list_head dirty_cowonly_roots
;
508 struct btrfs_fs_devices
*fs_devices
;
509 struct list_head space_info
;
511 int force_system_allocs
;
516 * in ram representation of the tree. extent_root is used for all allocations
517 * and for the extent tree extent_root root.
520 struct extent_buffer
*node
;
521 struct extent_buffer
*commit_root
;
522 struct btrfs_root_item root_item
;
523 struct btrfs_key root_key
;
524 struct btrfs_fs_info
*fs_info
;
528 /* data allocations are done in sectorsize units */
531 /* node allocations are done in nodesize units */
534 /* leaf allocations are done in leafsize units */
537 /* leaf allocations are done in leafsize units */
546 u64 last_inode_alloc
;
548 /* the dirty list is only used by non-reference counted roots */
549 struct list_head dirty_list
;
553 * inode items have the data typically returned from stat and store other
554 * info about object characteristics. There is one for every file and dir in
557 #define BTRFS_INODE_ITEM_KEY 1
558 #define BTRFS_INODE_REF_KEY 2
559 #define BTRFS_XATTR_ITEM_KEY 8
561 /* reserve 3-15 close to the inode for later flexibility */
564 * dir items are the name -> inode pointers in a directory. There is one
565 * for every name in a directory.
567 #define BTRFS_DIR_ITEM_KEY 16
568 #define BTRFS_DIR_INDEX_KEY 17
570 * extent data is for file data
572 #define BTRFS_EXTENT_DATA_KEY 18
574 * csum items have the checksums for data in the extents
576 #define BTRFS_CSUM_ITEM_KEY 19
578 /* reserve 20-31 for other file stuff */
581 * root items point to tree roots. There are typically in the root
582 * tree used by the super block to find all the other trees
584 #define BTRFS_ROOT_ITEM_KEY 32
586 * extent items are in the extent map tree. These record which blocks
587 * are used, and how many references there are to each block
589 #define BTRFS_EXTENT_ITEM_KEY 33
590 #define BTRFS_EXTENT_REF_KEY 34
593 * block groups give us hints into the extent allocation trees. Which
594 * blocks are free etc etc
596 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
598 #define BTRFS_DEV_EXTENT_KEY 75
599 #define BTRFS_DEV_ITEM_KEY 76
600 #define BTRFS_CHUNK_ITEM_KEY 77
603 * string items are for debugging. They just store a short string of
606 #define BTRFS_STRING_ITEM_KEY 253
610 #define BTRFS_INODE_NODATASUM (1 << 0)
611 #define BTRFS_INODE_NODATACOW (1 << 1)
612 #define BTRFS_INODE_READONLY (1 << 2)
614 #define read_eb_member(eb, ptr, type, member, result) ( \
615 read_extent_buffer(eb, (char *)(result), \
616 ((unsigned long)(ptr)) + \
617 offsetof(type, member), \
618 sizeof(((type *)0)->member)))
620 #define write_eb_member(eb, ptr, type, member, result) ( \
621 write_extent_buffer(eb, (char *)(result), \
622 ((unsigned long)(ptr)) + \
623 offsetof(type, member), \
624 sizeof(((type *)0)->member)))
626 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
627 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
629 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
630 return le##bits##_to_cpu(h->member); \
632 static inline void btrfs_set_##name(struct extent_buffer *eb, \
635 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
636 h->member = cpu_to_le##bits(val); \
639 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
640 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
643 unsigned long offset = (unsigned long)s; \
644 type *p = (type *) (eb->data + offset); \
645 return le##bits##_to_cpu(p->member); \
647 static inline void btrfs_set_##name(struct extent_buffer *eb, \
648 type *s, u##bits val) \
650 unsigned long offset = (unsigned long)s; \
651 type *p = (type *) (eb->data + offset); \
652 p->member = cpu_to_le##bits(val); \
655 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
656 static inline u##bits btrfs_##name(type *s) \
658 return le##bits##_to_cpu(s->member); \
660 static inline void btrfs_set_##name(type *s, u##bits val) \
662 s->member = cpu_to_le##bits(val); \
665 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
666 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
667 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
668 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
669 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
670 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
671 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
672 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
673 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
674 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
676 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
677 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
679 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
681 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
683 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
685 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
687 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
688 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
690 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
692 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
695 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
697 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
700 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
701 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
702 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
703 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
704 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
705 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
706 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
707 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
708 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
709 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
711 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
713 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
716 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
717 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
718 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
720 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
722 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
724 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
726 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
727 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
729 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
730 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
732 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
735 unsigned long offset
= (unsigned long)c
;
736 offset
+= offsetof(struct btrfs_chunk
, stripe
);
737 offset
+= nr
* sizeof(struct btrfs_stripe
);
738 return (struct btrfs_stripe
*)offset
;
741 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
742 struct btrfs_chunk
*c
, int nr
)
744 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
747 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
748 struct btrfs_chunk
*c
, int nr
,
751 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
754 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
755 struct btrfs_chunk
*c
, int nr
)
757 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
760 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
761 struct btrfs_chunk
*c
, int nr
,
764 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
767 /* struct btrfs_block_group_item */
768 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
770 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
772 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
773 struct btrfs_block_group_item
, chunk_objectid
, 64);
775 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
776 struct btrfs_block_group_item
, chunk_objectid
, 64);
777 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
778 struct btrfs_block_group_item
, flags
, 64);
779 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
780 struct btrfs_block_group_item
, flags
, 64);
782 /* struct btrfs_inode_ref */
783 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
785 /* struct btrfs_inode_item */
786 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
787 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
788 BTRFS_SETGET_FUNCS(inode_nblocks
, struct btrfs_inode_item
, nblocks
, 64);
789 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
790 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
791 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
792 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
793 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
794 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
795 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 16);
796 BTRFS_SETGET_FUNCS(inode_compat_flags
, struct btrfs_inode_item
,
799 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
800 struct btrfs_inode_item
, generation
, 64);
801 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
802 struct btrfs_inode_item
, size
, 64);
803 BTRFS_SETGET_STACK_FUNCS(stack_inode_nblocks
,
804 struct btrfs_inode_item
, nblocks
, 64);
805 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
806 struct btrfs_inode_item
, block_group
, 64);
807 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
808 struct btrfs_inode_item
, nlink
, 32);
809 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
810 struct btrfs_inode_item
, uid
, 32);
811 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
812 struct btrfs_inode_item
, gid
, 32);
813 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
814 struct btrfs_inode_item
, mode
, 32);
815 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
816 struct btrfs_inode_item
, rdev
, 64);
817 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
818 struct btrfs_inode_item
, flags
, 16);
819 BTRFS_SETGET_STACK_FUNCS(stack_inode_compat_flags
,
820 struct btrfs_inode_item
, compat_flags
, 16);
822 static inline struct btrfs_timespec
*
823 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
825 unsigned long ptr
= (unsigned long)inode_item
;
826 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
827 return (struct btrfs_timespec
*)ptr
;
830 static inline struct btrfs_timespec
*
831 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
833 unsigned long ptr
= (unsigned long)inode_item
;
834 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
835 return (struct btrfs_timespec
*)ptr
;
838 static inline struct btrfs_timespec
*
839 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
841 unsigned long ptr
= (unsigned long)inode_item
;
842 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
843 return (struct btrfs_timespec
*)ptr
;
846 static inline struct btrfs_timespec
*
847 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
849 unsigned long ptr
= (unsigned long)inode_item
;
850 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
851 return (struct btrfs_timespec
*)ptr
;
854 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
855 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
856 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
858 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
861 /* struct btrfs_dev_extent */
862 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
864 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
866 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
868 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
870 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
872 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
873 return (u8
*)((unsigned long)dev
+ ptr
);
876 /* struct btrfs_extent_item */
877 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
879 /* struct btrfs_extent_ref */
880 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
881 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
882 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
883 BTRFS_SETGET_FUNCS(ref_offset
, struct btrfs_extent_ref
, offset
, 64);
885 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
886 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
888 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
890 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset
, struct btrfs_extent_ref
, offset
, 64);
892 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
895 /* struct btrfs_node */
896 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
897 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
899 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
902 ptr
= offsetof(struct btrfs_node
, ptrs
) +
903 sizeof(struct btrfs_key_ptr
) * nr
;
904 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
907 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
911 ptr
= offsetof(struct btrfs_node
, ptrs
) +
912 sizeof(struct btrfs_key_ptr
) * nr
;
913 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
916 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
919 ptr
= offsetof(struct btrfs_node
, ptrs
) +
920 sizeof(struct btrfs_key_ptr
) * nr
;
921 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
924 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
928 ptr
= offsetof(struct btrfs_node
, ptrs
) +
929 sizeof(struct btrfs_key_ptr
) * nr
;
930 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
933 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
935 return offsetof(struct btrfs_node
, ptrs
) +
936 sizeof(struct btrfs_key_ptr
) * nr
;
939 static inline void btrfs_node_key(struct extent_buffer
*eb
,
940 struct btrfs_disk_key
*disk_key
, int nr
)
943 ptr
= btrfs_node_key_ptr_offset(nr
);
944 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
945 struct btrfs_key_ptr
, key
, disk_key
);
948 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
949 struct btrfs_disk_key
*disk_key
, int nr
)
952 ptr
= btrfs_node_key_ptr_offset(nr
);
953 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
954 struct btrfs_key_ptr
, key
, disk_key
);
957 /* struct btrfs_item */
958 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
959 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
961 static inline unsigned long btrfs_item_nr_offset(int nr
)
963 return offsetof(struct btrfs_leaf
, items
) +
964 sizeof(struct btrfs_item
) * nr
;
967 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
970 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
973 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
974 struct btrfs_item
*item
)
976 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
979 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
981 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
984 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
986 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
989 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
991 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
994 static inline void btrfs_item_key(struct extent_buffer
*eb
,
995 struct btrfs_disk_key
*disk_key
, int nr
)
997 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
998 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1001 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1002 struct btrfs_disk_key
*disk_key
, int nr
)
1004 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1005 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1008 /* struct btrfs_dir_item */
1009 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1010 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1011 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1013 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1014 struct btrfs_dir_item
*item
,
1015 struct btrfs_disk_key
*key
)
1017 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1020 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1021 struct btrfs_dir_item
*item
,
1022 struct btrfs_disk_key
*key
)
1024 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1027 /* struct btrfs_disk_key */
1028 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1030 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1031 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1033 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1034 struct btrfs_disk_key
*disk
)
1036 cpu
->offset
= le64_to_cpu(disk
->offset
);
1037 cpu
->type
= disk
->type
;
1038 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1041 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1042 struct btrfs_key
*cpu
)
1044 disk
->offset
= cpu_to_le64(cpu
->offset
);
1045 disk
->type
= cpu
->type
;
1046 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1049 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1050 struct btrfs_key
*key
, int nr
)
1052 struct btrfs_disk_key disk_key
;
1053 btrfs_node_key(eb
, &disk_key
, nr
);
1054 btrfs_disk_key_to_cpu(key
, &disk_key
);
1057 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1058 struct btrfs_key
*key
, int nr
)
1060 struct btrfs_disk_key disk_key
;
1061 btrfs_item_key(eb
, &disk_key
, nr
);
1062 btrfs_disk_key_to_cpu(key
, &disk_key
);
1065 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1066 struct btrfs_dir_item
*item
,
1067 struct btrfs_key
*key
)
1069 struct btrfs_disk_key disk_key
;
1070 btrfs_dir_item_key(eb
, item
, &disk_key
);
1071 btrfs_disk_key_to_cpu(key
, &disk_key
);
1075 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1080 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1085 /* struct btrfs_header */
1086 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1087 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1089 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1090 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1091 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1092 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1094 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1096 return (btrfs_header_flags(eb
) & flag
) == flag
;
1099 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1101 u64 flags
= btrfs_header_flags(eb
);
1102 btrfs_set_header_flags(eb
, flags
| flag
);
1103 return (flags
& flag
) == flag
;
1106 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1108 u64 flags
= btrfs_header_flags(eb
);
1109 btrfs_set_header_flags(eb
, flags
& ~flag
);
1110 return (flags
& flag
) == flag
;
1113 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1115 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1119 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1121 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1125 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1127 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1131 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1133 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1137 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1142 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1147 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1152 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1154 return (btrfs_header_level(eb
) == 0);
1157 /* struct btrfs_root_item */
1158 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1159 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1160 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1162 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1163 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1164 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1165 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1166 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 32);
1167 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1168 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1170 /* struct btrfs_super_block */
1171 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1172 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1174 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1175 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1176 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1177 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1179 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1181 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1182 chunk_root_level
, 64);
1183 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1185 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1187 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1189 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1191 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1193 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1195 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1196 root_dir_objectid
, 64);
1197 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1200 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1202 return offsetof(struct btrfs_leaf
, items
);
1205 /* struct btrfs_file_extent_item */
1206 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1208 static inline unsigned long btrfs_file_extent_inline_start(struct
1209 btrfs_file_extent_item
*e
)
1211 unsigned long offset
= (unsigned long)e
;
1212 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1216 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1218 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1221 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1222 struct btrfs_item
*e
)
1224 unsigned long offset
;
1225 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1226 return btrfs_item_size(eb
, e
) - offset
;
1229 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1231 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1233 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1234 disk_num_bytes
, 64);
1235 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1237 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1240 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1242 return root
->leafsize
;
1243 return root
->nodesize
;
1246 /* helper function to cast into the data area of the leaf. */
1247 #define btrfs_item_ptr(leaf, slot, type) \
1248 ((type *)(btrfs_leaf_data(leaf) + \
1249 btrfs_item_offset_nr(leaf, slot)))
1251 #define btrfs_item_ptr_offset(leaf, slot) \
1252 ((unsigned long)(btrfs_leaf_data(leaf) + \
1253 btrfs_item_offset_nr(leaf, slot)))
1256 u32
btrfs_count_snapshots_in_path(struct btrfs_root
*root
,
1257 struct btrfs_path
*count_path
,
1259 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1260 struct btrfs_root
*root
);
1261 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1262 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1263 btrfs_fs_info
*info
,
1265 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1266 struct btrfs_block_group_cache
1267 *hint
, u64 search_start
,
1268 int data
, int owner
);
1269 int btrfs_inc_root_ref(struct btrfs_trans_handle
*trans
,
1270 struct btrfs_root
*root
, u64 owner_objectid
);
1271 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1272 struct btrfs_root
*root
, u32 size
,
1274 u64 hint
, u64 empty_size
);
1275 struct extent_buffer
*__btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1276 struct btrfs_root
*root
,
1284 int btrfs_grow_extent_tree(struct btrfs_trans_handle
*trans
,
1285 struct btrfs_root
*root
, u64 new_size
);
1286 int btrfs_shrink_extent_tree(struct btrfs_root
*root
, u64 new_size
);
1287 int btrfs_insert_extent_backref(struct btrfs_trans_handle
*trans
,
1288 struct btrfs_root
*root
,
1289 struct btrfs_path
*path
, u64 bytenr
,
1290 u64 root_objectid
, u64 ref_generation
,
1291 u64 owner
, u64 owner_offset
);
1292 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1293 struct btrfs_root
*root
,
1294 u64 num_bytes
, u64 root_objectid
, u64 ref_generation
,
1295 u64 owner
, u64 owner_offset
,
1296 u64 empty_size
, u64 hint_byte
,
1297 u64 search_end
, struct btrfs_key
*ins
, int data
);
1298 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1299 struct extent_buffer
*buf
);
1300 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1301 *root
, u64 bytenr
, u64 num_bytes
,
1302 u64 root_objectid
, u64 ref_generation
,
1303 u64 owner_objectid
, u64 owner_offset
, int pin
);
1304 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1305 struct btrfs_root
*root
,
1306 struct extent_io_tree
*unpin
);
1307 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1308 struct btrfs_root
*root
,
1309 u64 bytenr
, u64 num_bytes
,
1310 u64 root_objectid
, u64 ref_generation
,
1311 u64 owner
, u64 owner_offset
);
1312 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1313 struct btrfs_root
*root
);
1314 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1315 int btrfs_read_block_groups(struct btrfs_root
*root
);
1316 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1317 struct btrfs_root
*root
, u64 bytes_used
,
1318 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1320 u64
btrfs_hash_extent_ref(u64 root_objectid
, u64 ref_generation
,
1321 u64 owner
, u64 owner_offset
);
1322 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
1323 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
1324 int alloc
, int mark_free
);
1326 int btrfs_previous_item(struct btrfs_root
*root
,
1327 struct btrfs_path
*path
, u64 min_objectid
,
1329 int btrfs_comp_keys(struct btrfs_disk_key
*disk
, struct btrfs_key
*k2
);
1330 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1331 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1332 struct extent_buffer
*parent
, int parent_slot
,
1333 struct extent_buffer
**cow_ret
);
1334 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1335 struct btrfs_root
*root
,
1336 struct extent_buffer
*buf
,
1337 struct extent_buffer
*parent
, int parent_slot
,
1338 struct extent_buffer
**cow_ret
,
1339 u64 search_start
, u64 empty_size
);
1340 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1341 struct btrfs_root
*root
,
1342 struct extent_buffer
*buf
,
1343 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1344 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1345 *root
, struct btrfs_path
*path
, u32 data_size
);
1346 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1347 struct btrfs_root
*root
,
1348 struct btrfs_path
*path
,
1349 u32 new_size
, int from_end
);
1350 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1351 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1353 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1354 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1355 int start_slot
, int cache_only
, u64
*last_ret
,
1356 struct btrfs_key
*progress
);
1357 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1358 struct btrfs_path
*btrfs_alloc_path(void);
1359 void btrfs_free_path(struct btrfs_path
*p
);
1360 void btrfs_init_path(struct btrfs_path
*p
);
1361 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1362 struct btrfs_path
*path
, int slot
, int nr
);
1364 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1365 struct btrfs_root
*root
,
1366 struct btrfs_path
*path
)
1368 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1371 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1372 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1373 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1374 struct btrfs_root
*root
,
1375 struct btrfs_path
*path
,
1376 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1378 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1379 struct btrfs_root
*root
,
1380 struct btrfs_path
*path
,
1381 struct btrfs_key
*key
,
1384 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1387 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1388 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1389 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1390 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1395 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1396 struct btrfs_key
*key
);
1397 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1398 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1400 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1401 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1403 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1404 btrfs_root_item
*item
, struct btrfs_key
*key
);
1405 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1406 struct btrfs_root
*latest_root
);
1408 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1409 *root
, const char *name
, int name_len
, u64 dir
,
1410 struct btrfs_key
*location
, u8 type
);
1411 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1412 struct btrfs_root
*root
,
1413 struct btrfs_path
*path
, u64 dir
,
1414 const char *name
, int name_len
,
1416 struct btrfs_dir_item
*
1417 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1418 struct btrfs_root
*root
,
1419 struct btrfs_path
*path
, u64 dir
,
1420 u64 objectid
, const char *name
, int name_len
,
1422 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1423 struct btrfs_path
*path
,
1424 const char *name
, int name_len
);
1425 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1426 struct btrfs_root
*root
,
1427 struct btrfs_path
*path
,
1428 struct btrfs_dir_item
*di
);
1429 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1430 struct btrfs_root
*root
, const char *name
,
1431 u16 name_len
, const void *data
, u16 data_len
,
1433 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1434 struct btrfs_root
*root
,
1435 struct btrfs_path
*path
, u64 dir
,
1436 const char *name
, u16 name_len
,
1439 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1440 struct btrfs_root
*fs_root
,
1441 u64 dirid
, u64
*objectid
);
1442 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1445 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1446 struct btrfs_root
*root
,
1447 const char *name
, int name_len
,
1448 u64 inode_objectid
, u64 ref_objectid
);
1449 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1450 struct btrfs_root
*root
,
1451 const char *name
, int name_len
,
1452 u64 inode_objectid
, u64 ref_objectid
);
1453 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1454 struct btrfs_root
*root
,
1455 struct btrfs_path
*path
, u64 objectid
);
1456 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1457 *root
, u64 objectid
, struct btrfs_inode_item
1459 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1460 *root
, struct btrfs_path
*path
,
1461 struct btrfs_key
*location
, int mod
);
1464 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1465 struct btrfs_root
*root
,
1466 u64 objectid
, u64 pos
, u64 offset
,
1469 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
1470 struct btrfs_root
*root
, u64 objectid
,
1471 u64 offset
, char *buffer
, size_t size
);
1472 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1473 struct btrfs_root
*root
,
1474 struct btrfs_path
*path
, u64 objectid
,
1475 u64 bytenr
, int mod
);
1476 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
1477 struct btrfs_root
*root
,
1478 struct btrfs_inode_item
*inode
,
1479 u64 objectid
, u64 offset
,
1480 char *data
, size_t len
);
1481 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1482 struct btrfs_root
*root
,
1483 struct btrfs_path
*path
,
1484 u64 objectid
, u64 offset
,
1486 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1487 struct btrfs_root
*root
, struct btrfs_path
*path
,