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"
30 struct btrfs_trans_handle
;
31 #define BTRFS_MAGIC "_BHRfS_M"
33 #define BTRFS_MAX_LEVEL 8
35 #define BTRFS_COMPAT_EXTENT_TREE_V0
37 /* holds pointers to all of the tree roots */
38 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
40 /* stores information about which extents are in use, and reference counts */
41 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
44 * chunk tree stores translations from logical -> physical block numbering
45 * the super block points to the chunk tree
47 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
50 * stores information about which areas of a given device are in use.
51 * one per device. The tree of tree roots points to the device tree
53 #define BTRFS_DEV_TREE_OBJECTID 4ULL
55 /* one per subvolume, storing files and directories */
56 #define BTRFS_FS_TREE_OBJECTID 5ULL
58 /* directory objectid inside the root tree */
59 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
60 /* holds checksums of all the data extents */
61 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
64 /* for storing balance parameters in the root tree */
65 #define BTRFS_BALANCE_OBJECTID -4ULL
67 /* oprhan objectid for tracking unlinked/truncated files */
68 #define BTRFS_ORPHAN_OBJECTID -5ULL
70 /* does write ahead logging to speed up fsyncs */
71 #define BTRFS_TREE_LOG_OBJECTID -6ULL
72 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
75 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
76 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
79 * extent checksums all have this objectid
80 * this allows them to share the logging tree
83 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
85 /* For storing free space cache */
86 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
89 * The inode number assigned to the special inode for sotring
92 #define BTRFS_FREE_INO_OBJECTID -12ULL
94 /* dummy objectid represents multiple objectids */
95 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
98 * All files have objectids in this range.
100 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
101 #define BTRFS_LAST_FREE_OBJECTID -256ULL
102 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
107 * the device items go into the chunk tree. The key is in the form
108 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
110 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
113 * we can actually store much bigger names, but lets not confuse the rest
116 #define BTRFS_NAME_LEN 255
118 /* 32 bytes in various csum fields */
119 #define BTRFS_CSUM_SIZE 32
122 #define BTRFS_CSUM_TYPE_CRC32 0
126 #define BTRFS_CSUM_TYPE_CRC32 0
128 static int btrfs_csum_sizes
[] = { 4, 0 };
130 /* four bytes for CRC32 */
131 #define BTRFS_CRC32_SIZE 4
132 #define BTRFS_EMPTY_DIR_SIZE 0
134 #define BTRFS_FT_UNKNOWN 0
135 #define BTRFS_FT_REG_FILE 1
136 #define BTRFS_FT_DIR 2
137 #define BTRFS_FT_CHRDEV 3
138 #define BTRFS_FT_BLKDEV 4
139 #define BTRFS_FT_FIFO 5
140 #define BTRFS_FT_SOCK 6
141 #define BTRFS_FT_SYMLINK 7
142 #define BTRFS_FT_XATTR 8
143 #define BTRFS_FT_MAX 9
146 * the key defines the order in the tree, and so it also defines (optimal)
147 * block layout. objectid corresonds to the inode number. The flags
148 * tells us things about the object, and is a kind of stream selector.
149 * so for a given inode, keys with flags of 1 might refer to the inode
150 * data, flags of 2 may point to file data in the btree and flags == 3
151 * may point to extents.
153 * offset is the starting byte offset for this key in the stream.
155 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
156 * in cpu native order. Otherwise they are identical and their sizes
157 * should be the same (ie both packed)
159 struct btrfs_disk_key
{
163 } __attribute__ ((__packed__
));
169 } __attribute__ ((__packed__
));
171 struct btrfs_mapping_tree
{
172 struct cache_tree cache_tree
;
175 #define BTRFS_UUID_SIZE 16
176 struct btrfs_dev_item
{
177 /* the internal btrfs device id */
180 /* size of the device */
186 /* optimal io alignment for this device */
189 /* optimal io width for this device */
192 /* minimal io size for this device */
195 /* type and info about this device */
198 /* expected generation for this device */
202 * starting byte of this partition on the device,
203 * to allowr for stripe alignment in the future
207 /* grouping information for allocation decisions */
210 /* seek speed 0-100 where 100 is fastest */
213 /* bandwidth 0-100 where 100 is fastest */
216 /* btrfs generated uuid for this device */
217 u8 uuid
[BTRFS_UUID_SIZE
];
219 /* uuid of FS who owns this device */
220 u8 fsid
[BTRFS_UUID_SIZE
];
221 } __attribute__ ((__packed__
));
223 struct btrfs_stripe
{
226 u8 dev_uuid
[BTRFS_UUID_SIZE
];
227 } __attribute__ ((__packed__
));
230 /* size of this chunk in bytes */
233 /* objectid of the root referencing this chunk */
239 /* optimal io alignment for this chunk */
242 /* optimal io width for this chunk */
245 /* minimal io size for this chunk */
248 /* 2^16 stripes is quite a lot, a second limit is the size of a single
253 /* sub stripes only matter for raid10 */
255 struct btrfs_stripe stripe
;
256 /* additional stripes go here */
257 } __attribute__ ((__packed__
));
259 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
261 BUG_ON(num_stripes
== 0);
262 return sizeof(struct btrfs_chunk
) +
263 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
266 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
267 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
268 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
269 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
271 #define BTRFS_BACKREF_REV_MAX 256
272 #define BTRFS_BACKREF_REV_SHIFT 56
273 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
274 BTRFS_BACKREF_REV_SHIFT)
276 #define BTRFS_OLD_BACKREF_REV 0
277 #define BTRFS_MIXED_BACKREF_REV 1
280 * every tree block (leaf or node) starts with this header.
282 struct btrfs_header
{
283 /* these first four must match the super block */
284 u8 csum
[BTRFS_CSUM_SIZE
];
285 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
286 __le64 bytenr
; /* which block this node is supposed to live in */
289 /* allowed to be different from the super from here on down */
290 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
295 } __attribute__ ((__packed__
));
297 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
298 sizeof(struct btrfs_header)) / \
299 sizeof(struct btrfs_key_ptr))
300 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
301 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
302 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
303 sizeof(struct btrfs_item) - \
304 sizeof(struct btrfs_file_extent_item))
305 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
306 sizeof(struct btrfs_item) -\
307 sizeof(struct btrfs_dir_item))
311 * this is a very generous portion of the super block, giving us
312 * room to translate 14 chunks with 3 stripes each.
314 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
315 #define BTRFS_LABEL_SIZE 256
318 * just in case we somehow lose the roots and are not able to mount,
319 * we store an array of the roots from previous transactions
322 #define BTRFS_NUM_BACKUP_ROOTS 4
323 struct btrfs_root_backup
{
325 __le64 tree_root_gen
;
328 __le64 chunk_root_gen
;
331 __le64 extent_root_gen
;
340 __le64 csum_root_gen
;
350 u8 extent_root_level
;
354 /* future and to align */
356 } __attribute__ ((__packed__
));
359 * the super block basically lists the main trees of the FS
360 * it currently lacks any block count etc etc
362 struct btrfs_super_block
{
363 u8 csum
[BTRFS_CSUM_SIZE
];
364 /* the first 3 fields must match struct btrfs_header */
365 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
366 __le64 bytenr
; /* this block number */
369 /* allowed to be different from the btrfs_header from here own down */
376 /* this will help find the new super based on the log root */
377 __le64 log_root_transid
;
380 __le64 root_dir_objectid
;
386 __le32 sys_chunk_array_size
;
387 __le64 chunk_root_generation
;
389 __le64 compat_ro_flags
;
390 __le64 incompat_flags
;
395 struct btrfs_dev_item dev_item
;
397 char label
[BTRFS_LABEL_SIZE
];
399 __le64 cache_generation
;
401 /* future expansion */
403 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
404 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
405 } __attribute__ ((__packed__
));
408 * Compat flags that we support. If any incompat flags are set other than the
409 * ones specified below then we will fail to mount
411 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
412 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
413 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
414 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
416 * some patches floated around with a second compression method
417 * lets save that incompat here for when they do get in
418 * Note we don't actually support it, we're just reserving the
421 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
424 * older kernels tried to do bigger metadata blocks, but the
425 * code was pretty buggy. Lets not let them try anymore.
427 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
430 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
431 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
432 #define BTRFS_FEATURE_INCOMPAT_SUPP \
433 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
434 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
435 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
436 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
437 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
440 * A leaf is full of items. offset and size tell us where to find
441 * the item in the leaf (relative to the start of the data area)
444 struct btrfs_disk_key key
;
447 } __attribute__ ((__packed__
));
450 * leaves have an item area and a data area:
451 * [item0, item1....itemN] [free space] [dataN...data1, data0]
453 * The data is separate from the items to get the keys closer together
457 struct btrfs_header header
;
458 struct btrfs_item items
[];
459 } __attribute__ ((__packed__
));
462 * all non-leaf blocks are nodes, they hold only keys and pointers to
465 struct btrfs_key_ptr
{
466 struct btrfs_disk_key key
;
469 } __attribute__ ((__packed__
));
472 struct btrfs_header header
;
473 struct btrfs_key_ptr ptrs
[];
474 } __attribute__ ((__packed__
));
477 * btrfs_paths remember the path taken from the root down to the leaf.
478 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
479 * to any other levels that are present.
481 * The slots array records the index of the item or block pointer
482 * used while walking the tree.
486 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
487 int slots
[BTRFS_MAX_LEVEL
];
488 /* if there is real range locking, this locks field will change */
489 int locks
[BTRFS_MAX_LEVEL
];
491 /* keep some upper locks as we walk down */
495 * set by btrfs_split_item, tells search_slot to keep all locks
496 * and to force calls to keep space in the nodes
498 unsigned int search_for_split
:1;
499 unsigned int keep_locks
:1;
500 unsigned int skip_locking
:1;
501 unsigned int leave_spinning
:1;
505 * items in the extent btree are used to record the objectid of the
506 * owner of the block and the number of references
509 struct btrfs_extent_item
{
513 } __attribute__ ((__packed__
));
515 struct btrfs_extent_item_v0
{
517 } __attribute__ ((__packed__
));
519 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
520 sizeof(struct btrfs_item))
522 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
523 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
525 /* following flags only apply to tree blocks */
527 /* use full backrefs for extent pointers in the block*/
528 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
530 struct btrfs_tree_block_info
{
531 struct btrfs_disk_key key
;
533 } __attribute__ ((__packed__
));
535 struct btrfs_extent_data_ref
{
540 } __attribute__ ((__packed__
));
542 struct btrfs_shared_data_ref
{
544 } __attribute__ ((__packed__
));
546 struct btrfs_extent_inline_ref
{
549 } __attribute__ ((__packed__
));
551 struct btrfs_extent_ref_v0
{
556 } __attribute__ ((__packed__
));
558 /* dev extents record free space on individual devices. The owner
559 * field points back to the chunk allocation mapping tree that allocated
560 * the extent. The chunk tree uuid field is a way to double check the owner
562 struct btrfs_dev_extent
{
564 __le64 chunk_objectid
;
567 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
568 } __attribute__ ((__packed__
));
570 struct btrfs_inode_ref
{
574 } __attribute__ ((__packed__
));
576 struct btrfs_timespec
{
579 } __attribute__ ((__packed__
));
582 BTRFS_COMPRESS_NONE
= 0,
583 BTRFS_COMPRESS_ZLIB
= 1,
584 BTRFS_COMPRESS_LZO
= 2,
585 BTRFS_COMPRESS_TYPES
= 2,
586 BTRFS_COMPRESS_LAST
= 3,
587 } btrfs_compression_type
;
589 /* we don't understand any encryption methods right now */
591 BTRFS_ENCRYPTION_NONE
= 0,
592 BTRFS_ENCRYPTION_LAST
= 1,
593 } btrfs_encryption_type
;
595 struct btrfs_inode_item
{
596 /* nfs style generation number */
598 /* transid that last touched this inode */
610 /* modification sequence number for NFS */
614 * a little future expansion, for more than this we can
615 * just grow the inode item and version it
618 struct btrfs_timespec atime
;
619 struct btrfs_timespec ctime
;
620 struct btrfs_timespec mtime
;
621 struct btrfs_timespec otime
;
622 } __attribute__ ((__packed__
));
624 struct btrfs_dir_log_item
{
626 } __attribute__ ((__packed__
));
628 struct btrfs_dir_item
{
629 struct btrfs_disk_key location
;
634 } __attribute__ ((__packed__
));
636 struct btrfs_root_item
{
637 struct btrfs_inode_item inode
;
643 __le64 last_snapshot
;
646 struct btrfs_disk_key drop_progress
;
649 } __attribute__ ((__packed__
));
652 * this is used for both forward and backward root refs
654 struct btrfs_root_ref
{
658 } __attribute__ ((__packed__
));
660 #define BTRFS_FILE_EXTENT_INLINE 0
661 #define BTRFS_FILE_EXTENT_REG 1
662 #define BTRFS_FILE_EXTENT_PREALLOC 2
664 struct btrfs_file_extent_item
{
666 * transaction id that created this extent
670 * max number of bytes to hold this extent in ram
671 * when we split a compressed extent we can't know how big
672 * each of the resulting pieces will be. So, this is
673 * an upper limit on the size of the extent in ram instead of
679 * 32 bits for the various ways we might encode the data,
680 * including compression and encryption. If any of these
681 * are set to something a given disk format doesn't understand
682 * it is treated like an incompat flag for reading and writing,
687 __le16 other_encoding
; /* spare for later use */
689 /* are we inline data or a real extent? */
693 * disk space consumed by the extent, checksum blocks are included
697 __le64 disk_num_bytes
;
699 * the logical offset in file blocks (no csums)
700 * this extent record is for. This allows a file extent to point
701 * into the middle of an existing extent on disk, sharing it
702 * between two snapshots (useful if some bytes in the middle of the
703 * extent have changed
707 * the logical number of file blocks (no csums included)
711 } __attribute__ ((__packed__
));
713 struct btrfs_csum_item
{
715 } __attribute__ ((__packed__
));
717 /* tag for the radix tree of block groups in ram */
718 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
719 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
720 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
721 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
722 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
723 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
724 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
725 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
727 /* used in struct btrfs_balance_args fields */
728 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
730 struct btrfs_block_group_item
{
732 __le64 chunk_objectid
;
734 } __attribute__ ((__packed__
));
736 struct btrfs_space_info
{
742 struct list_head list
;
745 struct btrfs_block_group_cache
{
746 struct cache_extent cache
;
747 struct btrfs_key key
;
748 struct btrfs_block_group_item item
;
749 struct btrfs_space_info
*space_info
;
756 struct btrfs_extent_ops
{
757 int (*alloc_extent
)(struct btrfs_root
*root
, u64 num_bytes
,
758 u64 hint_byte
, struct btrfs_key
*ins
);
759 int (*free_extent
)(struct btrfs_root
*root
, u64 bytenr
,
764 struct btrfs_fs_devices
;
765 struct btrfs_fs_info
{
766 u8 fsid
[BTRFS_FSID_SIZE
];
767 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
768 struct btrfs_root
*fs_root
;
769 struct btrfs_root
*extent_root
;
770 struct btrfs_root
*tree_root
;
771 struct btrfs_root
*chunk_root
;
772 struct btrfs_root
*dev_root
;
773 struct btrfs_root
*csum_root
;
775 struct cache_tree fs_root_cache
;
777 /* the log root tree is a directory of all the other log roots */
778 struct btrfs_root
*log_root_tree
;
780 struct extent_io_tree extent_cache
;
781 struct extent_io_tree free_space_cache
;
782 struct extent_io_tree block_group_cache
;
783 struct extent_io_tree pinned_extents
;
784 struct extent_io_tree pending_del
;
785 struct extent_io_tree extent_ins
;
787 /* logical->physical extent mapping */
788 struct btrfs_mapping_tree mapping_tree
;
791 u64 last_trans_committed
;
793 u64 avail_data_alloc_bits
;
794 u64 avail_metadata_alloc_bits
;
795 u64 avail_system_alloc_bits
;
796 u64 data_alloc_profile
;
797 u64 metadata_alloc_profile
;
798 u64 system_alloc_profile
;
801 struct btrfs_trans_handle
*running_transaction
;
802 struct btrfs_super_block super_copy
;
803 struct mutex fs_mutex
;
808 struct btrfs_extent_ops
*extent_ops
;
809 struct list_head dirty_cowonly_roots
;
811 struct btrfs_fs_devices
*fs_devices
;
812 struct list_head space_info
;
815 int (*free_extent_hook
)(struct btrfs_trans_handle
*trans
,
816 struct btrfs_root
*root
,
817 u64 bytenr
, u64 num_bytes
, u64 parent
,
818 u64 root_objectid
, u64 owner
, u64 offset
,
820 struct cache_tree
*fsck_extent_cache
;
821 struct cache_tree
*corrupt_blocks
;
825 * in ram representation of the tree. extent_root is used for all allocations
826 * and for the extent tree extent_root root.
829 struct extent_buffer
*node
;
830 struct extent_buffer
*commit_root
;
831 struct btrfs_root_item root_item
;
832 struct btrfs_key root_key
;
833 struct btrfs_fs_info
*fs_info
;
837 /* data allocations are done in sectorsize units */
840 /* node allocations are done in nodesize units */
843 /* leaf allocations are done in leafsize units */
846 /* leaf allocations are done in leafsize units */
855 u64 last_inode_alloc
;
857 /* the dirty list is only used by non-reference counted roots */
858 struct list_head dirty_list
;
859 struct cache_extent cache
;
863 * inode items have the data typically returned from stat and store other
864 * info about object characteristics. There is one for every file and dir in
867 #define BTRFS_INODE_ITEM_KEY 1
868 #define BTRFS_INODE_REF_KEY 12
869 #define BTRFS_XATTR_ITEM_KEY 24
870 #define BTRFS_ORPHAN_ITEM_KEY 48
872 #define BTRFS_DIR_LOG_ITEM_KEY 60
873 #define BTRFS_DIR_LOG_INDEX_KEY 72
875 * dir items are the name -> inode pointers in a directory. There is one
876 * for every name in a directory.
878 #define BTRFS_DIR_ITEM_KEY 84
879 #define BTRFS_DIR_INDEX_KEY 96
882 * extent data is for file data
884 #define BTRFS_EXTENT_DATA_KEY 108
887 * csum items have the checksums for data in the extents
889 #define BTRFS_CSUM_ITEM_KEY 120
891 * extent csums are stored in a separate tree and hold csums for
892 * an entire extent on disk.
894 #define BTRFS_EXTENT_CSUM_KEY 128
897 * root items point to tree roots. There are typically in the root
898 * tree used by the super block to find all the other trees
900 #define BTRFS_ROOT_ITEM_KEY 132
903 * root backrefs tie subvols and snapshots to the directory entries that
906 #define BTRFS_ROOT_BACKREF_KEY 144
909 * root refs make a fast index for listing all of the snapshots and
910 * subvolumes referenced by a given root. They point directly to the
911 * directory item in the root that references the subvol
913 #define BTRFS_ROOT_REF_KEY 156
916 * extent items are in the extent map tree. These record which blocks
917 * are used, and how many references there are to each block
919 #define BTRFS_EXTENT_ITEM_KEY 168
921 #define BTRFS_TREE_BLOCK_REF_KEY 176
923 #define BTRFS_EXTENT_DATA_REF_KEY 178
925 /* old style extent backrefs */
926 #define BTRFS_EXTENT_REF_V0_KEY 180
928 #define BTRFS_SHARED_BLOCK_REF_KEY 182
930 #define BTRFS_SHARED_DATA_REF_KEY 184
934 * block groups give us hints into the extent allocation trees. Which
935 * blocks are free etc etc
937 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
939 #define BTRFS_DEV_EXTENT_KEY 204
940 #define BTRFS_DEV_ITEM_KEY 216
941 #define BTRFS_CHUNK_ITEM_KEY 228
943 #define BTRFS_BALANCE_ITEM_KEY 248
946 * string items are for debugging. They just store a short string of
949 #define BTRFS_STRING_ITEM_KEY 253
953 #define BTRFS_INODE_NODATASUM (1 << 0)
954 #define BTRFS_INODE_NODATACOW (1 << 1)
955 #define BTRFS_INODE_READONLY (1 << 2)
957 #define read_eb_member(eb, ptr, type, member, result) ( \
958 read_extent_buffer(eb, (char *)(result), \
959 ((unsigned long)(ptr)) + \
960 offsetof(type, member), \
961 sizeof(((type *)0)->member)))
963 #define write_eb_member(eb, ptr, type, member, result) ( \
964 write_extent_buffer(eb, (char *)(result), \
965 ((unsigned long)(ptr)) + \
966 offsetof(type, member), \
967 sizeof(((type *)0)->member)))
969 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
970 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
972 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
973 return le##bits##_to_cpu(h->member); \
975 static inline void btrfs_set_##name(struct extent_buffer *eb, \
978 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
979 h->member = cpu_to_le##bits(val); \
982 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
983 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
986 unsigned long offset = (unsigned long)s; \
987 type *p = (type *) (eb->data + offset); \
988 return le##bits##_to_cpu(p->member); \
990 static inline void btrfs_set_##name(struct extent_buffer *eb, \
991 type *s, u##bits val) \
993 unsigned long offset = (unsigned long)s; \
994 type *p = (type *) (eb->data + offset); \
995 p->member = cpu_to_le##bits(val); \
998 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
999 static inline u##bits btrfs_##name(type *s) \
1001 return le##bits##_to_cpu(s->member); \
1003 static inline void btrfs_set_##name(type *s, u##bits val) \
1005 s->member = cpu_to_le##bits(val); \
1008 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1009 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1010 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1011 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1012 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1013 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1015 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1016 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1017 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1018 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1019 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1020 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1022 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1023 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1025 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1027 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1029 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1031 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1033 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1034 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1036 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1038 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1040 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1043 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1045 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1048 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1050 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1053 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1054 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1055 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1056 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1057 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1058 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1059 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1060 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1061 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1062 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1063 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1065 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1067 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1070 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1071 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1072 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1074 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1076 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1078 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1080 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1081 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1083 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1085 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1086 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1088 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1091 unsigned long offset
= (unsigned long)c
;
1092 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1093 offset
+= nr
* sizeof(struct btrfs_stripe
);
1094 return (struct btrfs_stripe
*)offset
;
1097 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1099 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1102 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1103 struct btrfs_chunk
*c
, int nr
)
1105 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1108 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1109 struct btrfs_chunk
*c
, int nr
,
1112 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1115 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1116 struct btrfs_chunk
*c
, int nr
)
1118 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1121 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1122 struct btrfs_chunk
*c
, int nr
,
1125 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1128 /* struct btrfs_block_group_item */
1129 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1131 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1133 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1134 struct btrfs_block_group_item
, chunk_objectid
, 64);
1136 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1137 struct btrfs_block_group_item
, chunk_objectid
, 64);
1138 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1139 struct btrfs_block_group_item
, flags
, 64);
1140 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1141 struct btrfs_block_group_item
, flags
, 64);
1143 /* struct btrfs_inode_ref */
1144 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1145 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1146 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1148 /* struct btrfs_inode_item */
1149 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1150 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1151 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1152 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1153 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1154 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1155 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1156 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1157 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1158 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1159 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1160 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1162 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
1163 struct btrfs_inode_item
, generation
, 64);
1164 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
,
1165 struct btrfs_inode_item
, generation
, 64);
1166 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
1167 struct btrfs_inode_item
, size
, 64);
1168 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
,
1169 struct btrfs_inode_item
, nbytes
, 64);
1170 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
1171 struct btrfs_inode_item
, block_group
, 64);
1172 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
1173 struct btrfs_inode_item
, nlink
, 32);
1174 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
1175 struct btrfs_inode_item
, uid
, 32);
1176 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
1177 struct btrfs_inode_item
, gid
, 32);
1178 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
1179 struct btrfs_inode_item
, mode
, 32);
1180 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
1181 struct btrfs_inode_item
, rdev
, 64);
1182 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
1183 struct btrfs_inode_item
, flags
, 64);
1185 static inline struct btrfs_timespec
*
1186 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1188 unsigned long ptr
= (unsigned long)inode_item
;
1189 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1190 return (struct btrfs_timespec
*)ptr
;
1193 static inline struct btrfs_timespec
*
1194 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1196 unsigned long ptr
= (unsigned long)inode_item
;
1197 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1198 return (struct btrfs_timespec
*)ptr
;
1201 static inline struct btrfs_timespec
*
1202 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1204 unsigned long ptr
= (unsigned long)inode_item
;
1205 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1206 return (struct btrfs_timespec
*)ptr
;
1209 static inline struct btrfs_timespec
*
1210 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1212 unsigned long ptr
= (unsigned long)inode_item
;
1213 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1214 return (struct btrfs_timespec
*)ptr
;
1217 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1218 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1219 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
1221 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
1224 /* struct btrfs_dev_extent */
1225 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1227 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1228 chunk_objectid
, 64);
1229 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1231 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1233 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1235 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1236 return (u8
*)((unsigned long)dev
+ ptr
);
1240 /* struct btrfs_extent_item */
1241 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1242 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1244 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1246 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1248 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1250 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1251 struct btrfs_tree_block_info
*item
,
1252 struct btrfs_disk_key
*key
)
1254 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1257 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1258 struct btrfs_tree_block_info
*item
,
1259 struct btrfs_disk_key
*key
)
1261 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1264 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1266 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1268 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1270 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1273 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1276 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1278 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1281 static inline u32
btrfs_extent_inline_ref_size(int type
)
1283 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1284 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1285 return sizeof(struct btrfs_extent_inline_ref
);
1286 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1287 return sizeof(struct btrfs_shared_data_ref
) +
1288 sizeof(struct btrfs_extent_inline_ref
);
1289 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1290 return sizeof(struct btrfs_extent_data_ref
) +
1291 offsetof(struct btrfs_extent_inline_ref
, offset
);
1296 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1297 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1299 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1300 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1302 /* struct btrfs_node */
1303 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1304 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1306 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1309 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1310 sizeof(struct btrfs_key_ptr
) * nr
;
1311 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1314 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1318 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1319 sizeof(struct btrfs_key_ptr
) * nr
;
1320 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1323 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1326 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1327 sizeof(struct btrfs_key_ptr
) * nr
;
1328 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1331 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1335 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1336 sizeof(struct btrfs_key_ptr
) * nr
;
1337 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1340 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1342 return offsetof(struct btrfs_node
, ptrs
) +
1343 sizeof(struct btrfs_key_ptr
) * nr
;
1346 static inline void btrfs_node_key(struct extent_buffer
*eb
,
1347 struct btrfs_disk_key
*disk_key
, int nr
)
1350 ptr
= btrfs_node_key_ptr_offset(nr
);
1351 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1352 struct btrfs_key_ptr
, key
, disk_key
);
1355 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1356 struct btrfs_disk_key
*disk_key
, int nr
)
1359 ptr
= btrfs_node_key_ptr_offset(nr
);
1360 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1361 struct btrfs_key_ptr
, key
, disk_key
);
1364 /* struct btrfs_item */
1365 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1366 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1368 static inline unsigned long btrfs_item_nr_offset(int nr
)
1370 return offsetof(struct btrfs_leaf
, items
) +
1371 sizeof(struct btrfs_item
) * nr
;
1374 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1377 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1380 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1381 struct btrfs_item
*item
)
1383 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1386 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1388 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1391 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1393 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1396 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1398 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1401 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1402 struct btrfs_disk_key
*disk_key
, int nr
)
1404 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1405 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1408 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1409 struct btrfs_disk_key
*disk_key
, int nr
)
1411 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1412 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1415 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1418 * struct btrfs_root_ref
1420 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1421 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1422 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1424 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1425 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1426 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1428 /* struct btrfs_dir_item */
1429 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1430 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1431 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1432 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1434 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1435 struct btrfs_dir_item
*item
,
1436 struct btrfs_disk_key
*key
)
1438 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1441 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1442 struct btrfs_dir_item
*item
,
1443 struct btrfs_disk_key
*key
)
1445 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1448 /* struct btrfs_disk_key */
1449 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1451 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1452 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1454 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1455 struct btrfs_disk_key
*disk
)
1457 cpu
->offset
= le64_to_cpu(disk
->offset
);
1458 cpu
->type
= disk
->type
;
1459 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1462 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1463 struct btrfs_key
*cpu
)
1465 disk
->offset
= cpu_to_le64(cpu
->offset
);
1466 disk
->type
= cpu
->type
;
1467 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1470 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1471 struct btrfs_key
*key
, int nr
)
1473 struct btrfs_disk_key disk_key
;
1474 btrfs_node_key(eb
, &disk_key
, nr
);
1475 btrfs_disk_key_to_cpu(key
, &disk_key
);
1478 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1479 struct btrfs_key
*key
, int nr
)
1481 struct btrfs_disk_key disk_key
;
1482 btrfs_item_key(eb
, &disk_key
, nr
);
1483 btrfs_disk_key_to_cpu(key
, &disk_key
);
1486 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1487 struct btrfs_dir_item
*item
,
1488 struct btrfs_key
*key
)
1490 struct btrfs_disk_key disk_key
;
1491 btrfs_dir_item_key(eb
, item
, &disk_key
);
1492 btrfs_disk_key_to_cpu(key
, &disk_key
);
1496 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1501 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1506 /* struct btrfs_header */
1507 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1508 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1510 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1511 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1512 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1513 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1515 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1517 return (btrfs_header_flags(eb
) & flag
) == flag
;
1520 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1522 u64 flags
= btrfs_header_flags(eb
);
1523 btrfs_set_header_flags(eb
, flags
| flag
);
1524 return (flags
& flag
) == flag
;
1527 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1529 u64 flags
= btrfs_header_flags(eb
);
1530 btrfs_set_header_flags(eb
, flags
& ~flag
);
1531 return (flags
& flag
) == flag
;
1534 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1536 u64 flags
= btrfs_header_flags(eb
);
1537 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1540 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1543 u64 flags
= btrfs_header_flags(eb
);
1544 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1545 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1546 btrfs_set_header_flags(eb
, flags
);
1549 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1551 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1555 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1557 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1561 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1563 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1567 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1569 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1573 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1578 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1583 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1588 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1590 return (btrfs_header_level(eb
) == 0);
1593 /* struct btrfs_root_item */
1594 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1596 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1597 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1598 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1600 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1602 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1603 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1604 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1605 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1606 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1607 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1608 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1609 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1613 /* struct btrfs_root_backup */
1614 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
1616 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
1618 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
1619 tree_root_level
, 8);
1621 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
1623 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
1624 chunk_root_gen
, 64);
1625 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
1626 chunk_root_level
, 8);
1628 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
1630 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
1631 extent_root_gen
, 64);
1632 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
1633 extent_root_level
, 8);
1635 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
1637 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
1639 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
1642 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
1644 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
1646 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
1649 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
1651 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
1653 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
1654 csum_root_level
, 8);
1655 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
1657 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
1659 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
1662 /* struct btrfs_super_block */
1664 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1665 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1666 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1668 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1669 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1670 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1671 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1672 struct btrfs_super_block
, chunk_root_generation
, 64);
1673 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1675 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1677 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1678 chunk_root_level
, 8);
1679 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1681 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1682 log_root_transid
, 64);
1683 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1685 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1687 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1689 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1691 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1693 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1695 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1697 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1698 root_dir_objectid
, 64);
1699 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1701 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1703 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1705 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1706 incompat_flags
, 64);
1707 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1709 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
1710 cache_generation
, 64);
1712 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1714 int t
= btrfs_super_csum_type(s
);
1715 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1716 return btrfs_csum_sizes
[t
];
1719 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1721 return offsetof(struct btrfs_leaf
, items
);
1724 /* struct btrfs_file_extent_item */
1725 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1726 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1728 static inline unsigned long btrfs_file_extent_inline_start(struct
1729 btrfs_file_extent_item
*e
)
1731 unsigned long offset
= (unsigned long)e
;
1732 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1736 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1738 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1741 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1743 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1745 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1747 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
, struct btrfs_file_extent_item
,
1749 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1750 disk_num_bytes
, 64);
1751 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1753 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
, struct btrfs_file_extent_item
,
1755 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1757 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
, struct btrfs_file_extent_item
,
1759 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1761 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1763 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1765 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
, struct btrfs_file_extent_item
,
1767 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1769 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1770 other_encoding
, 16);
1772 /* this returns the number of file bytes represented by the inline item.
1773 * If an item is compressed, this is the uncompressed size
1775 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1776 struct btrfs_file_extent_item
*e
)
1778 return btrfs_file_extent_ram_bytes(eb
, e
);
1782 * this returns the number of bytes used by the item on disk, minus the
1783 * size of any extent headers. If a file is compressed on disk, this is
1784 * the compressed size
1786 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1787 struct btrfs_item
*e
)
1789 unsigned long offset
;
1790 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1791 return btrfs_item_size(eb
, e
) - offset
;
1794 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1796 return root
->leafsize
;
1797 return root
->nodesize
;
1800 /* helper function to cast into the data area of the leaf. */
1801 #define btrfs_item_ptr(leaf, slot, type) \
1802 ((type *)(btrfs_leaf_data(leaf) + \
1803 btrfs_item_offset_nr(leaf, slot)))
1805 #define btrfs_item_ptr_offset(leaf, slot) \
1806 ((unsigned long)(btrfs_leaf_data(leaf) + \
1807 btrfs_item_offset_nr(leaf, slot)))
1810 int btrfs_fix_block_accounting(struct btrfs_trans_handle
*trans
,
1811 struct btrfs_root
*root
);
1812 int btrfs_check_block_accounting(struct btrfs_root
*root
);
1813 void btrfs_pin_extent(struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 num_bytes
);
1814 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1815 struct btrfs_root
*root
);
1816 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1817 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1818 btrfs_fs_info
*info
,
1820 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1821 struct btrfs_block_group_cache
1822 *hint
, u64 search_start
,
1823 int data
, int owner
);
1824 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1825 struct btrfs_root
*root
,
1826 u32 blocksize
, u64 root_objectid
,
1827 struct btrfs_disk_key
*key
, int level
,
1828 u64 hint
, u64 empty_size
);
1829 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1830 struct btrfs_root
*root
,
1831 u64 num_bytes
, u64 parent
,
1832 u64 root_objectid
, u64 ref_generation
,
1833 u64 owner
, u64 empty_size
, u64 hint_byte
,
1834 u64 search_end
, struct btrfs_key
*ins
, int data
);
1835 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
1836 struct btrfs_root
*root
, u64 bytenr
,
1837 u64 num_bytes
, u64
*refs
, u64
*flags
);
1838 int btrfs_set_block_flags(struct btrfs_trans_handle
*trans
,
1839 struct btrfs_root
*root
,
1840 u64 bytenr
, u64 num_bytes
, u64 flags
);
1841 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1842 struct extent_buffer
*buf
, int record_parent
);
1843 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1844 struct extent_buffer
*buf
, int record_parent
);
1845 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
1846 struct btrfs_root
*root
,
1847 u64 bytenr
, u64 num_bytes
, u64 parent
,
1848 u64 root_objectid
, u64 owner
, u64 offset
);
1849 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1850 struct btrfs_root
*root
,
1851 struct extent_io_tree
*unpin
);
1852 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1853 struct btrfs_root
*root
,
1854 u64 bytenr
, u64 num_bytes
, u64 parent
,
1855 u64 root_objectid
, u64 ref_generation
,
1856 u64 owner_objectid
);
1857 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1858 struct btrfs_root
*root
, u64 bytenr
,
1859 u64 orig_parent
, u64 parent
,
1860 u64 root_objectid
, u64 ref_generation
,
1861 u64 owner_objectid
);
1862 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1863 struct btrfs_root
*root
);
1864 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1865 int btrfs_read_block_groups(struct btrfs_root
*root
);
1866 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1867 struct btrfs_root
*root
, u64 bytes_used
,
1868 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1870 int btrfs_make_block_groups(struct btrfs_trans_handle
*trans
,
1871 struct btrfs_root
*root
);
1872 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
1873 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
1874 int alloc
, int mark_free
);
1876 int btrfs_del_ptr(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1877 struct btrfs_path
*path
, int level
, int slot
);
1878 int btrfs_check_node(struct btrfs_root
*root
,
1879 struct btrfs_disk_key
*parent_key
,
1880 struct extent_buffer
*buf
);
1881 int btrfs_check_leaf(struct btrfs_root
*root
,
1882 struct btrfs_disk_key
*parent_key
,
1883 struct extent_buffer
*buf
);
1884 int btrfs_fsck_reinit_root(struct btrfs_trans_handle
*trans
,
1885 struct btrfs_root
*root
);
1886 void reada_for_search(struct btrfs_root
*root
, struct btrfs_path
*path
,
1887 int level
, int slot
, u64 objectid
);
1888 struct extent_buffer
*read_node_slot(struct btrfs_root
*root
,
1889 struct extent_buffer
*parent
, int slot
);
1890 int btrfs_previous_item(struct btrfs_root
*root
,
1891 struct btrfs_path
*path
, u64 min_objectid
,
1893 int btrfs_comp_keys(struct btrfs_disk_key
*disk
, struct btrfs_key
*k2
);
1894 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1895 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1896 struct extent_buffer
*parent
, int parent_slot
,
1897 struct extent_buffer
**cow_ret
);
1898 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1899 struct btrfs_root
*root
,
1900 struct extent_buffer
*buf
,
1901 struct extent_buffer
*parent
, int parent_slot
,
1902 struct extent_buffer
**cow_ret
,
1903 u64 search_start
, u64 empty_size
);
1904 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1905 struct btrfs_root
*root
,
1906 struct extent_buffer
*buf
,
1907 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1908 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1909 *root
, struct btrfs_path
*path
, u32 data_size
);
1910 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1911 struct btrfs_root
*root
,
1912 struct btrfs_path
*path
,
1913 u32 new_size
, int from_end
);
1914 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
1915 struct btrfs_root
*root
,
1916 struct btrfs_path
*path
,
1917 struct btrfs_key
*new_key
,
1918 unsigned long split_offset
);
1919 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1920 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1922 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1923 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1924 int start_slot
, int cache_only
, u64
*last_ret
,
1925 struct btrfs_key
*progress
);
1926 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1927 struct btrfs_path
*btrfs_alloc_path(void);
1928 void btrfs_free_path(struct btrfs_path
*p
);
1929 void btrfs_init_path(struct btrfs_path
*p
);
1930 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1931 struct btrfs_path
*path
, int slot
, int nr
);
1933 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1934 struct btrfs_root
*root
,
1935 struct btrfs_path
*path
)
1937 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1940 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1941 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1942 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1943 struct btrfs_root
*root
,
1944 struct btrfs_path
*path
,
1945 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1947 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1948 struct btrfs_root
*root
,
1949 struct btrfs_path
*path
,
1950 struct btrfs_key
*key
,
1953 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1956 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1957 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1958 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1959 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1961 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1962 struct btrfs_root
*root
, struct btrfs_path
*path
,
1963 struct btrfs_key
*new_key
);
1966 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
1967 struct btrfs_root
*tree_root
,
1968 u64 root_id
, u8 type
, u64 ref_id
,
1969 u64 dirid
, u64 sequence
,
1970 const char *name
, int name_len
);
1971 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1972 struct btrfs_key
*key
);
1973 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1974 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1976 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1977 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1979 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1980 btrfs_root_item
*item
, struct btrfs_key
*key
);
1981 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1982 struct btrfs_root
*latest_root
);
1984 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1985 *root
, const char *name
, int name_len
, u64 dir
,
1986 struct btrfs_key
*location
, u8 type
, u64 index
);
1987 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1988 struct btrfs_root
*root
,
1989 struct btrfs_path
*path
, u64 dir
,
1990 const char *name
, int name_len
,
1992 struct btrfs_dir_item
*
1993 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1994 struct btrfs_root
*root
,
1995 struct btrfs_path
*path
, u64 dir
,
1996 u64 objectid
, const char *name
, int name_len
,
1998 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1999 struct btrfs_path
*path
,
2000 const char *name
, int name_len
);
2001 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2002 struct btrfs_root
*root
,
2003 struct btrfs_path
*path
,
2004 struct btrfs_dir_item
*di
);
2005 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2006 struct btrfs_root
*root
, const char *name
,
2007 u16 name_len
, const void *data
, u16 data_len
,
2009 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2010 struct btrfs_root
*root
,
2011 struct btrfs_path
*path
, u64 dir
,
2012 const char *name
, u16 name_len
,
2015 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2016 struct btrfs_root
*fs_root
,
2017 u64 dirid
, u64
*objectid
);
2018 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2021 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2022 struct btrfs_root
*root
,
2023 const char *name
, int name_len
,
2024 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2025 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2026 struct btrfs_root
*root
,
2027 const char *name
, int name_len
,
2028 u64 inode_objectid
, u64 ref_objectid
);
2029 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2030 struct btrfs_root
*root
,
2031 struct btrfs_path
*path
, u64 objectid
);
2032 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2033 *root
, u64 objectid
, struct btrfs_inode_item
2035 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2036 *root
, struct btrfs_path
*path
,
2037 struct btrfs_key
*location
, int mod
);
2040 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2041 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2042 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2043 struct btrfs_root
*root
,
2044 u64 objectid
, u64 pos
, u64 offset
,
2047 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
2048 struct btrfs_root
*root
, u64 objectid
,
2049 u64 offset
, char *buffer
, size_t size
);
2050 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2051 struct btrfs_root
*root
,
2052 struct btrfs_path
*path
, u64 objectid
,
2053 u64 bytenr
, int mod
);
2054 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
2055 struct btrfs_root
*root
, u64 alloc_end
,
2056 u64 bytenr
, char *data
, size_t len
);
2057 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2058 struct btrfs_root
*root
,
2059 struct btrfs_path
*path
,
2060 u64 bytenr
, int cow
);
2061 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2062 struct btrfs_root
*root
, struct btrfs_path
*path
,