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
190 /* sub stripes only matter for raid10 */
192 struct btrfs_stripe stripe
;
193 /* additional stripes go here */
194 } __attribute__ ((__packed__
));
196 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
198 BUG_ON(num_stripes
== 0);
199 return sizeof(struct btrfs_chunk
) +
200 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
203 #define BTRFS_FSID_SIZE 16
204 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
207 * every tree block (leaf or node) starts with this header.
209 struct btrfs_header
{
210 /* these first four must match the super block */
211 u8 csum
[BTRFS_CSUM_SIZE
];
212 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
213 __le64 bytenr
; /* which block this node is supposed to live in */
216 /* allowed to be different from the super from here on down */
217 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
222 } __attribute__ ((__packed__
));
224 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
225 sizeof(struct btrfs_header)) / \
226 sizeof(struct btrfs_key_ptr))
227 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
228 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
229 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
230 sizeof(struct btrfs_item) - \
231 sizeof(struct btrfs_file_extent_item))
234 * this is a very generous portion of the super block, giving us
235 * room to translate 14 chunks with 3 stripes each.
237 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
238 #define BTRFS_LABEL_SIZE 256
241 * the super block basically lists the main trees of the FS
242 * it currently lacks any block count etc etc
244 struct btrfs_super_block
{
245 u8 csum
[BTRFS_CSUM_SIZE
];
246 /* the first 3 fields must match struct btrfs_header */
247 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
248 __le64 bytenr
; /* this block number */
251 /* allowed to be different from the btrfs_header from here own down */
258 __le64 root_dir_objectid
;
264 __le32 sys_chunk_array_size
;
267 struct btrfs_dev_item dev_item
;
268 char label
[BTRFS_LABEL_SIZE
];
269 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
270 } __attribute__ ((__packed__
));
273 * A leaf is full of items. offset and size tell us where to find
274 * the item in the leaf (relative to the start of the data area)
277 struct btrfs_disk_key key
;
280 } __attribute__ ((__packed__
));
283 * leaves have an item area and a data area:
284 * [item0, item1....itemN] [free space] [dataN...data1, data0]
286 * The data is separate from the items to get the keys closer together
290 struct btrfs_header header
;
291 struct btrfs_item items
[];
292 } __attribute__ ((__packed__
));
295 * all non-leaf blocks are nodes, they hold only keys and pointers to
298 struct btrfs_key_ptr
{
299 struct btrfs_disk_key key
;
302 } __attribute__ ((__packed__
));
305 struct btrfs_header header
;
306 struct btrfs_key_ptr ptrs
[];
307 } __attribute__ ((__packed__
));
310 * btrfs_paths remember the path taken from the root down to the leaf.
311 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
312 * to any other levels that are present.
314 * The slots array records the index of the item or block pointer
315 * used while walking the tree.
318 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
319 int slots
[BTRFS_MAX_LEVEL
];
325 * items in the extent btree are used to record the objectid of the
326 * owner of the block and the number of references
328 struct btrfs_extent_item
{
330 } __attribute__ ((__packed__
));
332 struct btrfs_extent_ref
{
337 } __attribute__ ((__packed__
));
339 /* dev extents record free space on individual devices. The owner
340 * field points back to the chunk allocation mapping tree that allocated
341 * the extent. The chunk tree uuid field is a way to double check the owner
343 struct btrfs_dev_extent
{
345 __le64 chunk_objectid
;
348 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
349 } __attribute__ ((__packed__
));
351 struct btrfs_inode_ref
{
355 } __attribute__ ((__packed__
));
357 struct btrfs_timespec
{
360 } __attribute__ ((__packed__
));
363 * there is no padding here on purpose. If you want to extent the inode,
364 * make a new item type
366 struct btrfs_inode_item
{
378 struct btrfs_timespec atime
;
379 struct btrfs_timespec ctime
;
380 struct btrfs_timespec mtime
;
381 struct btrfs_timespec otime
;
382 } __attribute__ ((__packed__
));
384 struct btrfs_dir_item
{
385 struct btrfs_disk_key location
;
389 } __attribute__ ((__packed__
));
391 struct btrfs_root_item
{
392 struct btrfs_inode_item inode
;
399 struct btrfs_disk_key drop_progress
;
402 } __attribute__ ((__packed__
));
404 #define BTRFS_FILE_EXTENT_REG 0
405 #define BTRFS_FILE_EXTENT_INLINE 1
407 struct btrfs_file_extent_item
{
411 * disk space consumed by the extent, checksum blocks are included
415 __le64 disk_num_bytes
;
417 * the logical offset in file blocks (no csums)
418 * this extent record is for. This allows a file extent to point
419 * into the middle of an existing extent on disk, sharing it
420 * between two snapshots (useful if some bytes in the middle of the
421 * extent have changed
425 * the logical number of file blocks (no csums included)
428 } __attribute__ ((__packed__
));
430 struct btrfs_csum_item
{
432 } __attribute__ ((__packed__
));
434 /* tag for the radix tree of block groups in ram */
435 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
436 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
437 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
438 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
439 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
440 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
441 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
443 struct btrfs_block_group_item
{
445 __le64 chunk_objectid
;
447 } __attribute__ ((__packed__
));
449 struct btrfs_space_info
{
455 struct list_head list
;
458 struct btrfs_block_group_cache
{
459 struct cache_extent cache
;
460 struct btrfs_key key
;
461 struct btrfs_block_group_item item
;
462 struct btrfs_space_info
*space_info
;
468 struct btrfs_extent_ops
{
469 int (*alloc_extent
)(struct btrfs_root
*root
, u64 num_bytes
,
470 u64 hint_byte
, struct btrfs_key
*ins
);
471 int (*free_extent
)(struct btrfs_root
*root
, u64 bytenr
,
476 struct btrfs_fs_devices
;
477 struct btrfs_fs_info
{
478 u8 fsid
[BTRFS_FSID_SIZE
];
479 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
480 struct btrfs_root
*fs_root
;
481 struct btrfs_root
*extent_root
;
482 struct btrfs_root
*tree_root
;
483 struct btrfs_root
*chunk_root
;
484 struct btrfs_root
*dev_root
;
486 struct extent_io_tree extent_cache
;
487 struct extent_io_tree free_space_cache
;
488 struct extent_io_tree block_group_cache
;
489 struct extent_io_tree pinned_extents
;
490 struct extent_io_tree pending_del
;
491 struct extent_io_tree extent_ins
;
493 /* logical->physical extent mapping */
494 struct btrfs_mapping_tree mapping_tree
;
497 u64 last_trans_committed
;
499 u64 avail_data_alloc_bits
;
500 u64 avail_metadata_alloc_bits
;
501 u64 avail_system_alloc_bits
;
502 u64 data_alloc_profile
;
503 u64 metadata_alloc_profile
;
504 u64 system_alloc_profile
;
507 struct btrfs_trans_handle
*running_transaction
;
508 struct btrfs_super_block super_copy
;
509 struct extent_buffer
*sb_buffer
;
510 struct mutex fs_mutex
;
513 struct btrfs_extent_ops
*extent_ops
;
514 struct list_head dirty_cowonly_roots
;
516 struct btrfs_fs_devices
*fs_devices
;
517 struct list_head space_info
;
523 * in ram representation of the tree. extent_root is used for all allocations
524 * and for the extent tree extent_root root.
527 struct extent_buffer
*node
;
528 struct extent_buffer
*commit_root
;
529 struct btrfs_root_item root_item
;
530 struct btrfs_key root_key
;
531 struct btrfs_fs_info
*fs_info
;
535 /* data allocations are done in sectorsize units */
538 /* node allocations are done in nodesize units */
541 /* leaf allocations are done in leafsize units */
544 /* leaf allocations are done in leafsize units */
553 u64 last_inode_alloc
;
555 /* the dirty list is only used by non-reference counted roots */
556 struct list_head dirty_list
;
560 * inode items have the data typically returned from stat and store other
561 * info about object characteristics. There is one for every file and dir in
564 #define BTRFS_INODE_ITEM_KEY 1
565 #define BTRFS_INODE_REF_KEY 2
566 #define BTRFS_XATTR_ITEM_KEY 8
568 /* reserve 3-15 close to the inode for later flexibility */
571 * dir items are the name -> inode pointers in a directory. There is one
572 * for every name in a directory.
574 #define BTRFS_DIR_ITEM_KEY 16
575 #define BTRFS_DIR_INDEX_KEY 17
577 * extent data is for file data
579 #define BTRFS_EXTENT_DATA_KEY 18
581 * csum items have the checksums for data in the extents
583 #define BTRFS_CSUM_ITEM_KEY 19
585 /* reserve 20-31 for other file stuff */
588 * root items point to tree roots. There are typically in the root
589 * tree used by the super block to find all the other trees
591 #define BTRFS_ROOT_ITEM_KEY 32
593 * extent items are in the extent map tree. These record which blocks
594 * are used, and how many references there are to each block
596 #define BTRFS_EXTENT_ITEM_KEY 33
597 #define BTRFS_EXTENT_REF_KEY 34
600 * block groups give us hints into the extent allocation trees. Which
601 * blocks are free etc etc
603 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
605 #define BTRFS_DEV_EXTENT_KEY 75
606 #define BTRFS_DEV_ITEM_KEY 76
607 #define BTRFS_CHUNK_ITEM_KEY 77
610 * string items are for debugging. They just store a short string of
613 #define BTRFS_STRING_ITEM_KEY 253
617 #define BTRFS_INODE_NODATASUM (1 << 0)
618 #define BTRFS_INODE_NODATACOW (1 << 1)
619 #define BTRFS_INODE_READONLY (1 << 2)
621 #define read_eb_member(eb, ptr, type, member, result) ( \
622 read_extent_buffer(eb, (char *)(result), \
623 ((unsigned long)(ptr)) + \
624 offsetof(type, member), \
625 sizeof(((type *)0)->member)))
627 #define write_eb_member(eb, ptr, type, member, result) ( \
628 write_extent_buffer(eb, (char *)(result), \
629 ((unsigned long)(ptr)) + \
630 offsetof(type, member), \
631 sizeof(((type *)0)->member)))
633 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
634 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
636 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
637 return le##bits##_to_cpu(h->member); \
639 static inline void btrfs_set_##name(struct extent_buffer *eb, \
642 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
643 h->member = cpu_to_le##bits(val); \
646 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
647 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
650 unsigned long offset = (unsigned long)s; \
651 type *p = (type *) (eb->data + offset); \
652 return le##bits##_to_cpu(p->member); \
654 static inline void btrfs_set_##name(struct extent_buffer *eb, \
655 type *s, u##bits val) \
657 unsigned long offset = (unsigned long)s; \
658 type *p = (type *) (eb->data + offset); \
659 p->member = cpu_to_le##bits(val); \
662 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
663 static inline u##bits btrfs_##name(type *s) \
665 return le##bits##_to_cpu(s->member); \
667 static inline void btrfs_set_##name(type *s, u##bits val) \
669 s->member = cpu_to_le##bits(val); \
672 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
673 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
674 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
675 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
676 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
677 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
678 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
679 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
680 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
681 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
683 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
684 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
686 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
688 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
690 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
692 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
694 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
695 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
697 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
699 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
702 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
704 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
707 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
708 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
709 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
710 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
711 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
712 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
713 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
714 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
715 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
716 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
717 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
719 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
721 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
724 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
725 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
726 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
728 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
730 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
732 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
734 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
735 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
737 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
739 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
740 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
742 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
745 unsigned long offset
= (unsigned long)c
;
746 offset
+= offsetof(struct btrfs_chunk
, stripe
);
747 offset
+= nr
* sizeof(struct btrfs_stripe
);
748 return (struct btrfs_stripe
*)offset
;
751 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
753 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
756 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
757 struct btrfs_chunk
*c
, int nr
)
759 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
762 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
763 struct btrfs_chunk
*c
, int nr
,
766 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
769 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
770 struct btrfs_chunk
*c
, int nr
)
772 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
775 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
776 struct btrfs_chunk
*c
, int nr
,
779 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
782 /* struct btrfs_block_group_item */
783 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
785 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
787 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
788 struct btrfs_block_group_item
, chunk_objectid
, 64);
790 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
791 struct btrfs_block_group_item
, chunk_objectid
, 64);
792 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
793 struct btrfs_block_group_item
, flags
, 64);
794 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
795 struct btrfs_block_group_item
, flags
, 64);
797 /* struct btrfs_inode_ref */
798 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
799 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
801 /* struct btrfs_inode_item */
802 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
803 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
804 BTRFS_SETGET_FUNCS(inode_nblocks
, struct btrfs_inode_item
, nblocks
, 64);
805 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
806 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
807 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
808 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
809 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
810 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
811 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 16);
812 BTRFS_SETGET_FUNCS(inode_compat_flags
, struct btrfs_inode_item
,
815 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
816 struct btrfs_inode_item
, generation
, 64);
817 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
818 struct btrfs_inode_item
, size
, 64);
819 BTRFS_SETGET_STACK_FUNCS(stack_inode_nblocks
,
820 struct btrfs_inode_item
, nblocks
, 64);
821 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
822 struct btrfs_inode_item
, block_group
, 64);
823 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
824 struct btrfs_inode_item
, nlink
, 32);
825 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
826 struct btrfs_inode_item
, uid
, 32);
827 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
828 struct btrfs_inode_item
, gid
, 32);
829 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
830 struct btrfs_inode_item
, mode
, 32);
831 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
832 struct btrfs_inode_item
, rdev
, 64);
833 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
834 struct btrfs_inode_item
, flags
, 16);
835 BTRFS_SETGET_STACK_FUNCS(stack_inode_compat_flags
,
836 struct btrfs_inode_item
, compat_flags
, 16);
838 static inline struct btrfs_timespec
*
839 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
841 unsigned long ptr
= (unsigned long)inode_item
;
842 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
843 return (struct btrfs_timespec
*)ptr
;
846 static inline struct btrfs_timespec
*
847 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
849 unsigned long ptr
= (unsigned long)inode_item
;
850 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
851 return (struct btrfs_timespec
*)ptr
;
854 static inline struct btrfs_timespec
*
855 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
857 unsigned long ptr
= (unsigned long)inode_item
;
858 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
859 return (struct btrfs_timespec
*)ptr
;
862 static inline struct btrfs_timespec
*
863 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
865 unsigned long ptr
= (unsigned long)inode_item
;
866 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
867 return (struct btrfs_timespec
*)ptr
;
870 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
871 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
872 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
874 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
877 /* struct btrfs_dev_extent */
878 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
880 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
882 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
884 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
886 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
888 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
889 return (u8
*)((unsigned long)dev
+ ptr
);
892 /* struct btrfs_extent_item */
893 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
895 /* struct btrfs_extent_ref */
896 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
897 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
898 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
899 BTRFS_SETGET_FUNCS(ref_offset
, struct btrfs_extent_ref
, offset
, 64);
901 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
902 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
904 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
906 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset
, struct btrfs_extent_ref
, offset
, 64);
908 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
911 /* struct btrfs_node */
912 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
913 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
915 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
918 ptr
= offsetof(struct btrfs_node
, ptrs
) +
919 sizeof(struct btrfs_key_ptr
) * nr
;
920 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
923 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
927 ptr
= offsetof(struct btrfs_node
, ptrs
) +
928 sizeof(struct btrfs_key_ptr
) * nr
;
929 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
932 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
935 ptr
= offsetof(struct btrfs_node
, ptrs
) +
936 sizeof(struct btrfs_key_ptr
) * nr
;
937 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
940 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
944 ptr
= offsetof(struct btrfs_node
, ptrs
) +
945 sizeof(struct btrfs_key_ptr
) * nr
;
946 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
949 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
951 return offsetof(struct btrfs_node
, ptrs
) +
952 sizeof(struct btrfs_key_ptr
) * nr
;
955 static inline void btrfs_node_key(struct extent_buffer
*eb
,
956 struct btrfs_disk_key
*disk_key
, int nr
)
959 ptr
= btrfs_node_key_ptr_offset(nr
);
960 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
961 struct btrfs_key_ptr
, key
, disk_key
);
964 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
965 struct btrfs_disk_key
*disk_key
, int nr
)
968 ptr
= btrfs_node_key_ptr_offset(nr
);
969 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
970 struct btrfs_key_ptr
, key
, disk_key
);
973 /* struct btrfs_item */
974 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
975 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
977 static inline unsigned long btrfs_item_nr_offset(int nr
)
979 return offsetof(struct btrfs_leaf
, items
) +
980 sizeof(struct btrfs_item
) * nr
;
983 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
986 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
989 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
990 struct btrfs_item
*item
)
992 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
995 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
997 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1000 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1002 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1005 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1007 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1010 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1011 struct btrfs_disk_key
*disk_key
, int nr
)
1013 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1014 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1017 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1018 struct btrfs_disk_key
*disk_key
, int nr
)
1020 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1021 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1024 /* struct btrfs_dir_item */
1025 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1026 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1027 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1029 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1030 struct btrfs_dir_item
*item
,
1031 struct btrfs_disk_key
*key
)
1033 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1036 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1037 struct btrfs_dir_item
*item
,
1038 struct btrfs_disk_key
*key
)
1040 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1043 /* struct btrfs_disk_key */
1044 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1046 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1047 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1049 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1050 struct btrfs_disk_key
*disk
)
1052 cpu
->offset
= le64_to_cpu(disk
->offset
);
1053 cpu
->type
= disk
->type
;
1054 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1057 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1058 struct btrfs_key
*cpu
)
1060 disk
->offset
= cpu_to_le64(cpu
->offset
);
1061 disk
->type
= cpu
->type
;
1062 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1065 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1066 struct btrfs_key
*key
, int nr
)
1068 struct btrfs_disk_key disk_key
;
1069 btrfs_node_key(eb
, &disk_key
, nr
);
1070 btrfs_disk_key_to_cpu(key
, &disk_key
);
1073 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1074 struct btrfs_key
*key
, int nr
)
1076 struct btrfs_disk_key disk_key
;
1077 btrfs_item_key(eb
, &disk_key
, nr
);
1078 btrfs_disk_key_to_cpu(key
, &disk_key
);
1081 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1082 struct btrfs_dir_item
*item
,
1083 struct btrfs_key
*key
)
1085 struct btrfs_disk_key disk_key
;
1086 btrfs_dir_item_key(eb
, item
, &disk_key
);
1087 btrfs_disk_key_to_cpu(key
, &disk_key
);
1091 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1096 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1101 /* struct btrfs_header */
1102 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1103 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1105 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1106 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1107 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1108 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1110 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1112 return (btrfs_header_flags(eb
) & flag
) == flag
;
1115 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1117 u64 flags
= btrfs_header_flags(eb
);
1118 btrfs_set_header_flags(eb
, flags
| flag
);
1119 return (flags
& flag
) == flag
;
1122 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1124 u64 flags
= btrfs_header_flags(eb
);
1125 btrfs_set_header_flags(eb
, flags
& ~flag
);
1126 return (flags
& flag
) == flag
;
1129 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1131 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1135 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1137 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1141 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1143 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1147 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1149 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1153 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1158 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1163 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1168 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1170 return (btrfs_header_level(eb
) == 0);
1173 /* struct btrfs_root_item */
1174 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1175 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1176 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1178 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1179 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1180 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1181 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1182 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 32);
1183 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1184 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1186 /* struct btrfs_super_block */
1187 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1188 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1190 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1191 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1192 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1193 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1195 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1197 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1198 chunk_root_level
, 64);
1199 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1201 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1203 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1205 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1207 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1209 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1211 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1212 root_dir_objectid
, 64);
1213 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1216 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1218 return offsetof(struct btrfs_leaf
, items
);
1221 /* struct btrfs_file_extent_item */
1222 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1224 static inline unsigned long btrfs_file_extent_inline_start(struct
1225 btrfs_file_extent_item
*e
)
1227 unsigned long offset
= (unsigned long)e
;
1228 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1232 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1234 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1237 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1238 struct btrfs_item
*e
)
1240 unsigned long offset
;
1241 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1242 return btrfs_item_size(eb
, e
) - offset
;
1245 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1247 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1249 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1250 disk_num_bytes
, 64);
1251 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1253 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1256 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1258 return root
->leafsize
;
1259 return root
->nodesize
;
1262 /* helper function to cast into the data area of the leaf. */
1263 #define btrfs_item_ptr(leaf, slot, type) \
1264 ((type *)(btrfs_leaf_data(leaf) + \
1265 btrfs_item_offset_nr(leaf, slot)))
1267 #define btrfs_item_ptr_offset(leaf, slot) \
1268 ((unsigned long)(btrfs_leaf_data(leaf) + \
1269 btrfs_item_offset_nr(leaf, slot)))
1272 u32
btrfs_count_snapshots_in_path(struct btrfs_root
*root
,
1273 struct btrfs_path
*count_path
,
1275 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1276 struct btrfs_root
*root
);
1277 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1278 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1279 btrfs_fs_info
*info
,
1281 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1282 struct btrfs_block_group_cache
1283 *hint
, u64 search_start
,
1284 int data
, int owner
);
1285 int btrfs_inc_root_ref(struct btrfs_trans_handle
*trans
,
1286 struct btrfs_root
*root
, u64 owner_objectid
);
1287 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1288 struct btrfs_root
*root
, u32 size
,
1290 u64 hint
, u64 empty_size
);
1291 struct extent_buffer
*__btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1292 struct btrfs_root
*root
,
1300 int btrfs_grow_extent_tree(struct btrfs_trans_handle
*trans
,
1301 struct btrfs_root
*root
, u64 new_size
);
1302 int btrfs_shrink_extent_tree(struct btrfs_root
*root
, u64 new_size
);
1303 int btrfs_insert_extent_backref(struct btrfs_trans_handle
*trans
,
1304 struct btrfs_root
*root
,
1305 struct btrfs_path
*path
, u64 bytenr
,
1306 u64 root_objectid
, u64 ref_generation
,
1307 u64 owner
, u64 owner_offset
);
1308 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1309 struct btrfs_root
*root
,
1310 u64 num_bytes
, u64 root_objectid
, u64 ref_generation
,
1311 u64 owner
, u64 owner_offset
,
1312 u64 empty_size
, u64 hint_byte
,
1313 u64 search_end
, struct btrfs_key
*ins
, int data
);
1314 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1315 struct extent_buffer
*buf
);
1316 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1317 *root
, u64 bytenr
, u64 num_bytes
,
1318 u64 root_objectid
, u64 ref_generation
,
1319 u64 owner_objectid
, u64 owner_offset
, int pin
);
1320 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1321 struct btrfs_root
*root
,
1322 struct extent_io_tree
*unpin
);
1323 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1324 struct btrfs_root
*root
,
1325 u64 bytenr
, u64 num_bytes
,
1326 u64 root_objectid
, u64 ref_generation
,
1327 u64 owner
, u64 owner_offset
);
1328 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1329 struct btrfs_root
*root
);
1330 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1331 int btrfs_read_block_groups(struct btrfs_root
*root
);
1332 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1333 struct btrfs_root
*root
, u64 bytes_used
,
1334 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1336 int btrfs_make_block_groups(struct btrfs_trans_handle
*trans
,
1337 struct btrfs_root
*root
);
1338 u64
btrfs_hash_extent_ref(u64 root_objectid
, u64 ref_generation
,
1339 u64 owner
, u64 owner_offset
);
1340 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
1341 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
1342 int alloc
, int mark_free
);
1344 int btrfs_previous_item(struct btrfs_root
*root
,
1345 struct btrfs_path
*path
, u64 min_objectid
,
1347 int btrfs_comp_keys(struct btrfs_disk_key
*disk
, struct btrfs_key
*k2
);
1348 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1349 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1350 struct extent_buffer
*parent
, int parent_slot
,
1351 struct extent_buffer
**cow_ret
);
1352 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1353 struct btrfs_root
*root
,
1354 struct extent_buffer
*buf
,
1355 struct extent_buffer
*parent
, int parent_slot
,
1356 struct extent_buffer
**cow_ret
,
1357 u64 search_start
, u64 empty_size
);
1358 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1359 struct btrfs_root
*root
,
1360 struct extent_buffer
*buf
,
1361 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1362 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1363 *root
, struct btrfs_path
*path
, u32 data_size
);
1364 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1365 struct btrfs_root
*root
,
1366 struct btrfs_path
*path
,
1367 u32 new_size
, int from_end
);
1368 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1369 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1371 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1372 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1373 int start_slot
, int cache_only
, u64
*last_ret
,
1374 struct btrfs_key
*progress
);
1375 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1376 struct btrfs_path
*btrfs_alloc_path(void);
1377 void btrfs_free_path(struct btrfs_path
*p
);
1378 void btrfs_init_path(struct btrfs_path
*p
);
1379 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1380 struct btrfs_path
*path
, int slot
, int nr
);
1382 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1383 struct btrfs_root
*root
,
1384 struct btrfs_path
*path
)
1386 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1389 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1390 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1391 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1392 struct btrfs_root
*root
,
1393 struct btrfs_path
*path
,
1394 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1396 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1397 struct btrfs_root
*root
,
1398 struct btrfs_path
*path
,
1399 struct btrfs_key
*key
,
1402 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1405 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1406 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1407 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1408 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1413 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1414 struct btrfs_key
*key
);
1415 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1416 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1418 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1419 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1421 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1422 btrfs_root_item
*item
, struct btrfs_key
*key
);
1423 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1424 struct btrfs_root
*latest_root
);
1426 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1427 *root
, const char *name
, int name_len
, u64 dir
,
1428 struct btrfs_key
*location
, u8 type
);
1429 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1430 struct btrfs_root
*root
,
1431 struct btrfs_path
*path
, u64 dir
,
1432 const char *name
, int name_len
,
1434 struct btrfs_dir_item
*
1435 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1436 struct btrfs_root
*root
,
1437 struct btrfs_path
*path
, u64 dir
,
1438 u64 objectid
, const char *name
, int name_len
,
1440 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1441 struct btrfs_path
*path
,
1442 const char *name
, int name_len
);
1443 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1444 struct btrfs_root
*root
,
1445 struct btrfs_path
*path
,
1446 struct btrfs_dir_item
*di
);
1447 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1448 struct btrfs_root
*root
, const char *name
,
1449 u16 name_len
, const void *data
, u16 data_len
,
1451 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1452 struct btrfs_root
*root
,
1453 struct btrfs_path
*path
, u64 dir
,
1454 const char *name
, u16 name_len
,
1457 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1458 struct btrfs_root
*fs_root
,
1459 u64 dirid
, u64
*objectid
);
1460 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1463 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1464 struct btrfs_root
*root
,
1465 const char *name
, int name_len
,
1466 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
1467 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1468 struct btrfs_root
*root
,
1469 const char *name
, int name_len
,
1470 u64 inode_objectid
, u64 ref_objectid
);
1471 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1472 struct btrfs_root
*root
,
1473 struct btrfs_path
*path
, u64 objectid
);
1474 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1475 *root
, u64 objectid
, struct btrfs_inode_item
1477 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1478 *root
, struct btrfs_path
*path
,
1479 struct btrfs_key
*location
, int mod
);
1482 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1483 struct btrfs_root
*root
,
1484 u64 objectid
, u64 pos
, u64 offset
,
1487 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
1488 struct btrfs_root
*root
, u64 objectid
,
1489 u64 offset
, char *buffer
, size_t size
);
1490 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1491 struct btrfs_root
*root
,
1492 struct btrfs_path
*path
, u64 objectid
,
1493 u64 bytenr
, int mod
);
1494 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
1495 struct btrfs_root
*root
,
1496 struct btrfs_inode_item
*inode
,
1497 u64 objectid
, u64 offset
,
1498 char *data
, size_t len
);
1499 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1500 struct btrfs_root
*root
,
1501 struct btrfs_path
*path
,
1502 u64 objectid
, u64 offset
,
1504 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1505 struct btrfs_root
*root
, struct btrfs_path
*path
,