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
124 static int btrfs_csum_sizes
[] = { 4, 0 };
126 /* four bytes for CRC32 */
127 #define BTRFS_CRC32_SIZE 4
128 #define BTRFS_EMPTY_DIR_SIZE 0
130 #define BTRFS_FT_UNKNOWN 0
131 #define BTRFS_FT_REG_FILE 1
132 #define BTRFS_FT_DIR 2
133 #define BTRFS_FT_CHRDEV 3
134 #define BTRFS_FT_BLKDEV 4
135 #define BTRFS_FT_FIFO 5
136 #define BTRFS_FT_SOCK 6
137 #define BTRFS_FT_SYMLINK 7
138 #define BTRFS_FT_XATTR 8
139 #define BTRFS_FT_MAX 9
142 * the key defines the order in the tree, and so it also defines (optimal)
143 * block layout. objectid corresonds to the inode number. The flags
144 * tells us things about the object, and is a kind of stream selector.
145 * so for a given inode, keys with flags of 1 might refer to the inode
146 * data, flags of 2 may point to file data in the btree and flags == 3
147 * may point to extents.
149 * offset is the starting byte offset for this key in the stream.
151 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
152 * in cpu native order. Otherwise they are identical and their sizes
153 * should be the same (ie both packed)
155 struct btrfs_disk_key
{
159 } __attribute__ ((__packed__
));
165 } __attribute__ ((__packed__
));
167 struct btrfs_mapping_tree
{
168 struct cache_tree cache_tree
;
171 #define BTRFS_UUID_SIZE 16
172 struct btrfs_dev_item
{
173 /* the internal btrfs device id */
176 /* size of the device */
182 /* optimal io alignment for this device */
185 /* optimal io width for this device */
188 /* minimal io size for this device */
191 /* type and info about this device */
194 /* expected generation for this device */
198 * starting byte of this partition on the device,
199 * to allowr for stripe alignment in the future
203 /* grouping information for allocation decisions */
206 /* seek speed 0-100 where 100 is fastest */
209 /* bandwidth 0-100 where 100 is fastest */
212 /* btrfs generated uuid for this device */
213 u8 uuid
[BTRFS_UUID_SIZE
];
215 /* uuid of FS who owns this device */
216 u8 fsid
[BTRFS_UUID_SIZE
];
217 } __attribute__ ((__packed__
));
219 struct btrfs_stripe
{
222 u8 dev_uuid
[BTRFS_UUID_SIZE
];
223 } __attribute__ ((__packed__
));
226 /* size of this chunk in bytes */
229 /* objectid of the root referencing this chunk */
235 /* optimal io alignment for this chunk */
238 /* optimal io width for this chunk */
241 /* minimal io size for this chunk */
244 /* 2^16 stripes is quite a lot, a second limit is the size of a single
249 /* sub stripes only matter for raid10 */
251 struct btrfs_stripe stripe
;
252 /* additional stripes go here */
253 } __attribute__ ((__packed__
));
255 struct btrfs_free_space_header
{
256 struct btrfs_disk_key location
;
260 } __attribute__ ((__packed__
));
262 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
264 BUG_ON(num_stripes
== 0);
265 return sizeof(struct btrfs_chunk
) +
266 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
269 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
270 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
271 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
272 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
274 #define BTRFS_BACKREF_REV_MAX 256
275 #define BTRFS_BACKREF_REV_SHIFT 56
276 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
277 BTRFS_BACKREF_REV_SHIFT)
279 #define BTRFS_OLD_BACKREF_REV 0
280 #define BTRFS_MIXED_BACKREF_REV 1
283 * every tree block (leaf or node) starts with this header.
285 struct btrfs_header
{
286 /* these first four must match the super block */
287 u8 csum
[BTRFS_CSUM_SIZE
];
288 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
289 __le64 bytenr
; /* which block this node is supposed to live in */
292 /* allowed to be different from the super from here on down */
293 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
298 } __attribute__ ((__packed__
));
300 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
301 sizeof(struct btrfs_header)) / \
302 sizeof(struct btrfs_key_ptr))
303 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
304 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
305 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
306 sizeof(struct btrfs_item) - \
307 sizeof(struct btrfs_file_extent_item))
308 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
309 sizeof(struct btrfs_item) -\
310 sizeof(struct btrfs_dir_item))
314 * this is a very generous portion of the super block, giving us
315 * room to translate 14 chunks with 3 stripes each.
317 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
318 #define BTRFS_LABEL_SIZE 256
321 * just in case we somehow lose the roots and are not able to mount,
322 * we store an array of the roots from previous transactions
325 #define BTRFS_NUM_BACKUP_ROOTS 4
326 struct btrfs_root_backup
{
328 __le64 tree_root_gen
;
331 __le64 chunk_root_gen
;
334 __le64 extent_root_gen
;
343 __le64 csum_root_gen
;
353 u8 extent_root_level
;
357 /* future and to align */
359 } __attribute__ ((__packed__
));
362 * the super block basically lists the main trees of the FS
363 * it currently lacks any block count etc etc
365 struct btrfs_super_block
{
366 u8 csum
[BTRFS_CSUM_SIZE
];
367 /* the first 3 fields must match struct btrfs_header */
368 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
369 __le64 bytenr
; /* this block number */
372 /* allowed to be different from the btrfs_header from here own down */
379 /* this will help find the new super based on the log root */
380 __le64 log_root_transid
;
383 __le64 root_dir_objectid
;
389 __le32 sys_chunk_array_size
;
390 __le64 chunk_root_generation
;
392 __le64 compat_ro_flags
;
393 __le64 incompat_flags
;
398 struct btrfs_dev_item dev_item
;
400 char label
[BTRFS_LABEL_SIZE
];
402 __le64 cache_generation
;
404 /* future expansion */
406 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
407 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
408 } __attribute__ ((__packed__
));
411 * Compat flags that we support. If any incompat flags are set other than the
412 * ones specified below then we will fail to mount
414 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
415 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
416 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
417 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
419 * some patches floated around with a second compression method
420 * lets save that incompat here for when they do get in
421 * Note we don't actually support it, we're just reserving the
424 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
427 * older kernels tried to do bigger metadata blocks, but the
428 * code was pretty buggy. Lets not let them try anymore.
430 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
433 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
434 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
435 #define BTRFS_FEATURE_INCOMPAT_SUPP \
436 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
437 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
438 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
439 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
440 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
443 * A leaf is full of items. offset and size tell us where to find
444 * the item in the leaf (relative to the start of the data area)
447 struct btrfs_disk_key key
;
450 } __attribute__ ((__packed__
));
453 * leaves have an item area and a data area:
454 * [item0, item1....itemN] [free space] [dataN...data1, data0]
456 * The data is separate from the items to get the keys closer together
460 struct btrfs_header header
;
461 struct btrfs_item items
[];
462 } __attribute__ ((__packed__
));
465 * all non-leaf blocks are nodes, they hold only keys and pointers to
468 struct btrfs_key_ptr
{
469 struct btrfs_disk_key key
;
472 } __attribute__ ((__packed__
));
475 struct btrfs_header header
;
476 struct btrfs_key_ptr ptrs
[];
477 } __attribute__ ((__packed__
));
480 * btrfs_paths remember the path taken from the root down to the leaf.
481 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
482 * to any other levels that are present.
484 * The slots array records the index of the item or block pointer
485 * used while walking the tree.
489 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
490 int slots
[BTRFS_MAX_LEVEL
];
491 /* if there is real range locking, this locks field will change */
492 int locks
[BTRFS_MAX_LEVEL
];
494 /* keep some upper locks as we walk down */
498 * set by btrfs_split_item, tells search_slot to keep all locks
499 * and to force calls to keep space in the nodes
501 unsigned int search_for_split
:1;
502 unsigned int keep_locks
:1;
503 unsigned int skip_locking
:1;
504 unsigned int leave_spinning
:1;
508 * items in the extent btree are used to record the objectid of the
509 * owner of the block and the number of references
512 struct btrfs_extent_item
{
516 } __attribute__ ((__packed__
));
518 struct btrfs_extent_item_v0
{
520 } __attribute__ ((__packed__
));
522 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
523 sizeof(struct btrfs_item))
525 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
526 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
528 /* following flags only apply to tree blocks */
530 /* use full backrefs for extent pointers in the block*/
531 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
533 struct btrfs_tree_block_info
{
534 struct btrfs_disk_key key
;
536 } __attribute__ ((__packed__
));
538 struct btrfs_extent_data_ref
{
543 } __attribute__ ((__packed__
));
545 struct btrfs_shared_data_ref
{
547 } __attribute__ ((__packed__
));
549 struct btrfs_extent_inline_ref
{
552 } __attribute__ ((__packed__
));
554 struct btrfs_extent_ref_v0
{
559 } __attribute__ ((__packed__
));
561 /* dev extents record free space on individual devices. The owner
562 * field points back to the chunk allocation mapping tree that allocated
563 * the extent. The chunk tree uuid field is a way to double check the owner
565 struct btrfs_dev_extent
{
567 __le64 chunk_objectid
;
570 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
571 } __attribute__ ((__packed__
));
573 struct btrfs_inode_ref
{
577 } __attribute__ ((__packed__
));
579 struct btrfs_timespec
{
582 } __attribute__ ((__packed__
));
585 BTRFS_COMPRESS_NONE
= 0,
586 BTRFS_COMPRESS_ZLIB
= 1,
587 BTRFS_COMPRESS_LZO
= 2,
588 BTRFS_COMPRESS_TYPES
= 2,
589 BTRFS_COMPRESS_LAST
= 3,
590 } btrfs_compression_type
;
592 /* we don't understand any encryption methods right now */
594 BTRFS_ENCRYPTION_NONE
= 0,
595 BTRFS_ENCRYPTION_LAST
= 1,
596 } btrfs_encryption_type
;
598 struct btrfs_inode_item
{
599 /* nfs style generation number */
601 /* transid that last touched this inode */
613 /* modification sequence number for NFS */
617 * a little future expansion, for more than this we can
618 * just grow the inode item and version it
621 struct btrfs_timespec atime
;
622 struct btrfs_timespec ctime
;
623 struct btrfs_timespec mtime
;
624 struct btrfs_timespec otime
;
625 } __attribute__ ((__packed__
));
627 struct btrfs_dir_log_item
{
629 } __attribute__ ((__packed__
));
631 struct btrfs_dir_item
{
632 struct btrfs_disk_key location
;
637 } __attribute__ ((__packed__
));
639 struct btrfs_root_item
{
640 struct btrfs_inode_item inode
;
646 __le64 last_snapshot
;
649 struct btrfs_disk_key drop_progress
;
654 * The following fields appear after subvol_uuids+subvol_times
659 * This generation number is used to test if the new fields are valid
660 * and up to date while reading the root item. Everytime the root item
661 * is written out, the "generation" field is copied into this field. If
662 * anyone ever mounted the fs with an older kernel, we will have
663 * mismatching generation values here and thus must invalidate the
664 * new fields. See btrfs_update_root and btrfs_find_last_root for
666 * the offset of generation_v2 is also used as the start for the memset
667 * when invalidating the fields.
669 __le64 generation_v2
;
670 u8 uuid
[BTRFS_UUID_SIZE
];
671 u8 parent_uuid
[BTRFS_UUID_SIZE
];
672 u8 received_uuid
[BTRFS_UUID_SIZE
];
673 __le64 ctransid
; /* updated when an inode changes */
674 __le64 otransid
; /* trans when created */
675 __le64 stransid
; /* trans when sent. non-zero for received subvol */
676 __le64 rtransid
; /* trans when received. non-zero for received subvol */
677 struct btrfs_timespec ctime
;
678 struct btrfs_timespec otime
;
679 struct btrfs_timespec stime
;
680 struct btrfs_timespec rtime
;
681 __le64 reserved
[8]; /* for future */
682 } __attribute__ ((__packed__
));
685 * this is used for both forward and backward root refs
687 struct btrfs_root_ref
{
691 } __attribute__ ((__packed__
));
693 #define BTRFS_FILE_EXTENT_INLINE 0
694 #define BTRFS_FILE_EXTENT_REG 1
695 #define BTRFS_FILE_EXTENT_PREALLOC 2
697 struct btrfs_file_extent_item
{
699 * transaction id that created this extent
703 * max number of bytes to hold this extent in ram
704 * when we split a compressed extent we can't know how big
705 * each of the resulting pieces will be. So, this is
706 * an upper limit on the size of the extent in ram instead of
712 * 32 bits for the various ways we might encode the data,
713 * including compression and encryption. If any of these
714 * are set to something a given disk format doesn't understand
715 * it is treated like an incompat flag for reading and writing,
720 __le16 other_encoding
; /* spare for later use */
722 /* are we inline data or a real extent? */
726 * disk space consumed by the extent, checksum blocks are included
730 __le64 disk_num_bytes
;
732 * the logical offset in file blocks (no csums)
733 * this extent record is for. This allows a file extent to point
734 * into the middle of an existing extent on disk, sharing it
735 * between two snapshots (useful if some bytes in the middle of the
736 * extent have changed
740 * the logical number of file blocks (no csums included)
744 } __attribute__ ((__packed__
));
746 struct btrfs_csum_item
{
748 } __attribute__ ((__packed__
));
750 /* tag for the radix tree of block groups in ram */
751 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
752 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
753 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
754 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
755 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
756 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
757 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
758 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
760 /* used in struct btrfs_balance_args fields */
761 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
763 struct btrfs_block_group_item
{
765 __le64 chunk_objectid
;
767 } __attribute__ ((__packed__
));
769 struct btrfs_space_info
{
775 struct list_head list
;
778 struct btrfs_block_group_cache
{
779 struct cache_extent cache
;
780 struct btrfs_key key
;
781 struct btrfs_block_group_item item
;
782 struct btrfs_space_info
*space_info
;
789 struct btrfs_extent_ops
{
790 int (*alloc_extent
)(struct btrfs_root
*root
, u64 num_bytes
,
791 u64 hint_byte
, struct btrfs_key
*ins
);
792 int (*free_extent
)(struct btrfs_root
*root
, u64 bytenr
,
797 struct btrfs_fs_devices
;
798 struct btrfs_fs_info
{
799 u8 fsid
[BTRFS_FSID_SIZE
];
800 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
801 struct btrfs_root
*fs_root
;
802 struct btrfs_root
*extent_root
;
803 struct btrfs_root
*tree_root
;
804 struct btrfs_root
*chunk_root
;
805 struct btrfs_root
*dev_root
;
806 struct btrfs_root
*csum_root
;
808 struct cache_tree fs_root_cache
;
810 /* the log root tree is a directory of all the other log roots */
811 struct btrfs_root
*log_root_tree
;
813 struct extent_io_tree extent_cache
;
814 struct extent_io_tree free_space_cache
;
815 struct extent_io_tree block_group_cache
;
816 struct extent_io_tree pinned_extents
;
817 struct extent_io_tree pending_del
;
818 struct extent_io_tree extent_ins
;
820 /* logical->physical extent mapping */
821 struct btrfs_mapping_tree mapping_tree
;
824 u64 last_trans_committed
;
826 u64 avail_data_alloc_bits
;
827 u64 avail_metadata_alloc_bits
;
828 u64 avail_system_alloc_bits
;
829 u64 data_alloc_profile
;
830 u64 metadata_alloc_profile
;
831 u64 system_alloc_profile
;
834 struct btrfs_trans_handle
*running_transaction
;
835 struct btrfs_super_block super_copy
;
836 struct mutex fs_mutex
;
841 struct btrfs_extent_ops
*extent_ops
;
842 struct list_head dirty_cowonly_roots
;
844 struct btrfs_fs_devices
*fs_devices
;
845 struct list_head space_info
;
848 int (*free_extent_hook
)(struct btrfs_trans_handle
*trans
,
849 struct btrfs_root
*root
,
850 u64 bytenr
, u64 num_bytes
, u64 parent
,
851 u64 root_objectid
, u64 owner
, u64 offset
,
853 struct cache_tree
*fsck_extent_cache
;
854 struct cache_tree
*corrupt_blocks
;
858 * in ram representation of the tree. extent_root is used for all allocations
859 * and for the extent tree extent_root root.
862 struct extent_buffer
*node
;
863 struct extent_buffer
*commit_root
;
864 struct btrfs_root_item root_item
;
865 struct btrfs_key root_key
;
866 struct btrfs_fs_info
*fs_info
;
870 /* data allocations are done in sectorsize units */
873 /* node allocations are done in nodesize units */
876 /* leaf allocations are done in leafsize units */
879 /* leaf allocations are done in leafsize units */
888 u64 last_inode_alloc
;
890 /* the dirty list is only used by non-reference counted roots */
891 struct list_head dirty_list
;
892 struct cache_extent cache
;
896 * inode items have the data typically returned from stat and store other
897 * info about object characteristics. There is one for every file and dir in
900 #define BTRFS_INODE_ITEM_KEY 1
901 #define BTRFS_INODE_REF_KEY 12
902 #define BTRFS_XATTR_ITEM_KEY 24
903 #define BTRFS_ORPHAN_ITEM_KEY 48
905 #define BTRFS_DIR_LOG_ITEM_KEY 60
906 #define BTRFS_DIR_LOG_INDEX_KEY 72
908 * dir items are the name -> inode pointers in a directory. There is one
909 * for every name in a directory.
911 #define BTRFS_DIR_ITEM_KEY 84
912 #define BTRFS_DIR_INDEX_KEY 96
915 * extent data is for file data
917 #define BTRFS_EXTENT_DATA_KEY 108
920 * csum items have the checksums for data in the extents
922 #define BTRFS_CSUM_ITEM_KEY 120
924 * extent csums are stored in a separate tree and hold csums for
925 * an entire extent on disk.
927 #define BTRFS_EXTENT_CSUM_KEY 128
930 * root items point to tree roots. There are typically in the root
931 * tree used by the super block to find all the other trees
933 #define BTRFS_ROOT_ITEM_KEY 132
936 * root backrefs tie subvols and snapshots to the directory entries that
939 #define BTRFS_ROOT_BACKREF_KEY 144
942 * root refs make a fast index for listing all of the snapshots and
943 * subvolumes referenced by a given root. They point directly to the
944 * directory item in the root that references the subvol
946 #define BTRFS_ROOT_REF_KEY 156
949 * extent items are in the extent map tree. These record which blocks
950 * are used, and how many references there are to each block
952 #define BTRFS_EXTENT_ITEM_KEY 168
954 #define BTRFS_TREE_BLOCK_REF_KEY 176
956 #define BTRFS_EXTENT_DATA_REF_KEY 178
958 /* old style extent backrefs */
959 #define BTRFS_EXTENT_REF_V0_KEY 180
961 #define BTRFS_SHARED_BLOCK_REF_KEY 182
963 #define BTRFS_SHARED_DATA_REF_KEY 184
967 * block groups give us hints into the extent allocation trees. Which
968 * blocks are free etc etc
970 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
972 #define BTRFS_DEV_EXTENT_KEY 204
973 #define BTRFS_DEV_ITEM_KEY 216
974 #define BTRFS_CHUNK_ITEM_KEY 228
976 #define BTRFS_BALANCE_ITEM_KEY 248
979 * string items are for debugging. They just store a short string of
982 #define BTRFS_STRING_ITEM_KEY 253
986 #define BTRFS_INODE_NODATASUM (1 << 0)
987 #define BTRFS_INODE_NODATACOW (1 << 1)
988 #define BTRFS_INODE_READONLY (1 << 2)
990 #define read_eb_member(eb, ptr, type, member, result) ( \
991 read_extent_buffer(eb, (char *)(result), \
992 ((unsigned long)(ptr)) + \
993 offsetof(type, member), \
994 sizeof(((type *)0)->member)))
996 #define write_eb_member(eb, ptr, type, member, result) ( \
997 write_extent_buffer(eb, (char *)(result), \
998 ((unsigned long)(ptr)) + \
999 offsetof(type, member), \
1000 sizeof(((type *)0)->member)))
1002 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1003 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1005 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1006 return le##bits##_to_cpu(h->member); \
1008 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1011 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1012 h->member = cpu_to_le##bits(val); \
1015 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1016 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
1019 unsigned long offset = (unsigned long)s; \
1020 type *p = (type *) (eb->data + offset); \
1021 return le##bits##_to_cpu(p->member); \
1023 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1024 type *s, u##bits val) \
1026 unsigned long offset = (unsigned long)s; \
1027 type *p = (type *) (eb->data + offset); \
1028 p->member = cpu_to_le##bits(val); \
1031 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1032 static inline u##bits btrfs_##name(type *s) \
1034 return le##bits##_to_cpu(s->member); \
1036 static inline void btrfs_set_##name(type *s, u##bits val) \
1038 s->member = cpu_to_le##bits(val); \
1041 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1042 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1043 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1044 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1045 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1046 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1048 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1049 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1050 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1051 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1052 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1053 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1055 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1056 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1058 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1060 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1062 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1064 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1066 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1067 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1069 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1071 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1073 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1076 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1078 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1081 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1083 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1086 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1087 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1088 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1089 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1090 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1091 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1092 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1093 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1094 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1095 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1096 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1098 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1100 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1103 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1104 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1105 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1107 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1109 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1111 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1113 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1114 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1116 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1118 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1119 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1121 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1124 unsigned long offset
= (unsigned long)c
;
1125 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1126 offset
+= nr
* sizeof(struct btrfs_stripe
);
1127 return (struct btrfs_stripe
*)offset
;
1130 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1132 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1135 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1136 struct btrfs_chunk
*c
, int nr
)
1138 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1141 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1142 struct btrfs_chunk
*c
, int nr
,
1145 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1148 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1149 struct btrfs_chunk
*c
, int nr
)
1151 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1154 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1155 struct btrfs_chunk
*c
, int nr
,
1158 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1161 /* struct btrfs_block_group_item */
1162 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1164 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1166 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1167 struct btrfs_block_group_item
, chunk_objectid
, 64);
1169 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1170 struct btrfs_block_group_item
, chunk_objectid
, 64);
1171 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1172 struct btrfs_block_group_item
, flags
, 64);
1173 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1174 struct btrfs_block_group_item
, flags
, 64);
1176 /* struct btrfs_inode_ref */
1177 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1178 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1179 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1181 /* struct btrfs_inode_item */
1182 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1183 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1184 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1185 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1186 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1187 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1188 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1189 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1190 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1191 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1192 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1193 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1195 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
1196 struct btrfs_inode_item
, generation
, 64);
1197 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
,
1198 struct btrfs_inode_item
, generation
, 64);
1199 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
1200 struct btrfs_inode_item
, size
, 64);
1201 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
,
1202 struct btrfs_inode_item
, nbytes
, 64);
1203 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
1204 struct btrfs_inode_item
, block_group
, 64);
1205 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
1206 struct btrfs_inode_item
, nlink
, 32);
1207 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
1208 struct btrfs_inode_item
, uid
, 32);
1209 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
1210 struct btrfs_inode_item
, gid
, 32);
1211 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
1212 struct btrfs_inode_item
, mode
, 32);
1213 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
1214 struct btrfs_inode_item
, rdev
, 64);
1215 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
1216 struct btrfs_inode_item
, flags
, 64);
1218 static inline struct btrfs_timespec
*
1219 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1221 unsigned long ptr
= (unsigned long)inode_item
;
1222 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1223 return (struct btrfs_timespec
*)ptr
;
1226 static inline struct btrfs_timespec
*
1227 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1229 unsigned long ptr
= (unsigned long)inode_item
;
1230 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1231 return (struct btrfs_timespec
*)ptr
;
1234 static inline struct btrfs_timespec
*
1235 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1237 unsigned long ptr
= (unsigned long)inode_item
;
1238 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1239 return (struct btrfs_timespec
*)ptr
;
1242 static inline struct btrfs_timespec
*
1243 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1245 unsigned long ptr
= (unsigned long)inode_item
;
1246 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1247 return (struct btrfs_timespec
*)ptr
;
1250 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1251 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1252 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
1254 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
1257 /* struct btrfs_dev_extent */
1258 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1260 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1261 chunk_objectid
, 64);
1262 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1264 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1266 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1268 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1269 return (u8
*)((unsigned long)dev
+ ptr
);
1273 /* struct btrfs_extent_item */
1274 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1275 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1277 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1279 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1281 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1283 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1284 struct btrfs_tree_block_info
*item
,
1285 struct btrfs_disk_key
*key
)
1287 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1290 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1291 struct btrfs_tree_block_info
*item
,
1292 struct btrfs_disk_key
*key
)
1294 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1297 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1299 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1301 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1303 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1306 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1309 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1311 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1314 static inline u32
btrfs_extent_inline_ref_size(int type
)
1316 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1317 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1318 return sizeof(struct btrfs_extent_inline_ref
);
1319 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1320 return sizeof(struct btrfs_shared_data_ref
) +
1321 sizeof(struct btrfs_extent_inline_ref
);
1322 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1323 return sizeof(struct btrfs_extent_data_ref
) +
1324 offsetof(struct btrfs_extent_inline_ref
, offset
);
1329 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1330 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1332 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1333 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1335 /* struct btrfs_node */
1336 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1337 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1339 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1342 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1343 sizeof(struct btrfs_key_ptr
) * nr
;
1344 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1347 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1351 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1352 sizeof(struct btrfs_key_ptr
) * nr
;
1353 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1356 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1359 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1360 sizeof(struct btrfs_key_ptr
) * nr
;
1361 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1364 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1368 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1369 sizeof(struct btrfs_key_ptr
) * nr
;
1370 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1373 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1375 return offsetof(struct btrfs_node
, ptrs
) +
1376 sizeof(struct btrfs_key_ptr
) * nr
;
1379 static inline void btrfs_node_key(struct extent_buffer
*eb
,
1380 struct btrfs_disk_key
*disk_key
, int nr
)
1383 ptr
= btrfs_node_key_ptr_offset(nr
);
1384 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1385 struct btrfs_key_ptr
, key
, disk_key
);
1388 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1389 struct btrfs_disk_key
*disk_key
, int nr
)
1392 ptr
= btrfs_node_key_ptr_offset(nr
);
1393 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1394 struct btrfs_key_ptr
, key
, disk_key
);
1397 /* struct btrfs_item */
1398 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1399 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1401 static inline unsigned long btrfs_item_nr_offset(int nr
)
1403 return offsetof(struct btrfs_leaf
, items
) +
1404 sizeof(struct btrfs_item
) * nr
;
1407 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1410 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1413 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1414 struct btrfs_item
*item
)
1416 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1419 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1421 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1424 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1426 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1429 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1431 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1434 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1435 struct btrfs_disk_key
*disk_key
, int nr
)
1437 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1438 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1441 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1442 struct btrfs_disk_key
*disk_key
, int nr
)
1444 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1445 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1448 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1451 * struct btrfs_root_ref
1453 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1454 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1455 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1457 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1458 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1459 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1461 /* struct btrfs_dir_item */
1462 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1463 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1464 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1465 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1467 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1469 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1470 struct btrfs_dir_item
*item
,
1471 struct btrfs_disk_key
*key
)
1473 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1476 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1477 struct btrfs_dir_item
*item
,
1478 struct btrfs_disk_key
*key
)
1480 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1483 /* struct btrfs_free_space_header */
1484 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1486 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1488 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1491 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1492 struct btrfs_free_space_header
*h
,
1493 struct btrfs_disk_key
*key
)
1495 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1498 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1499 struct btrfs_free_space_header
*h
,
1500 struct btrfs_disk_key
*key
)
1502 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1505 /* struct btrfs_disk_key */
1506 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1508 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1509 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1511 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1512 struct btrfs_disk_key
*disk
)
1514 cpu
->offset
= le64_to_cpu(disk
->offset
);
1515 cpu
->type
= disk
->type
;
1516 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1519 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1520 struct btrfs_key
*cpu
)
1522 disk
->offset
= cpu_to_le64(cpu
->offset
);
1523 disk
->type
= cpu
->type
;
1524 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1527 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1528 struct btrfs_key
*key
, int nr
)
1530 struct btrfs_disk_key disk_key
;
1531 btrfs_node_key(eb
, &disk_key
, nr
);
1532 btrfs_disk_key_to_cpu(key
, &disk_key
);
1535 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1536 struct btrfs_key
*key
, int nr
)
1538 struct btrfs_disk_key disk_key
;
1539 btrfs_item_key(eb
, &disk_key
, nr
);
1540 btrfs_disk_key_to_cpu(key
, &disk_key
);
1543 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1544 struct btrfs_dir_item
*item
,
1545 struct btrfs_key
*key
)
1547 struct btrfs_disk_key disk_key
;
1548 btrfs_dir_item_key(eb
, item
, &disk_key
);
1549 btrfs_disk_key_to_cpu(key
, &disk_key
);
1553 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1558 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1563 /* struct btrfs_header */
1564 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1565 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1567 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1568 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1569 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1570 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1572 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1574 return (btrfs_header_flags(eb
) & flag
) == flag
;
1577 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1579 u64 flags
= btrfs_header_flags(eb
);
1580 btrfs_set_header_flags(eb
, flags
| flag
);
1581 return (flags
& flag
) == flag
;
1584 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1586 u64 flags
= btrfs_header_flags(eb
);
1587 btrfs_set_header_flags(eb
, flags
& ~flag
);
1588 return (flags
& flag
) == flag
;
1591 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1593 u64 flags
= btrfs_header_flags(eb
);
1594 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1597 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1600 u64 flags
= btrfs_header_flags(eb
);
1601 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1602 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1603 btrfs_set_header_flags(eb
, flags
);
1606 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1608 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1612 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1614 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1618 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1620 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1624 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1626 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1630 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1635 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1640 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1645 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1647 return (btrfs_header_level(eb
) == 0);
1650 /* struct btrfs_root_item */
1651 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1653 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1654 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1655 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1657 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1659 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1660 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1661 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1662 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1663 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1664 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1665 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1666 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1668 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
1670 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
1672 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
1674 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
1676 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
1679 /* struct btrfs_root_backup */
1680 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
1682 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
1684 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
1685 tree_root_level
, 8);
1687 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
1689 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
1690 chunk_root_gen
, 64);
1691 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
1692 chunk_root_level
, 8);
1694 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
1696 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
1697 extent_root_gen
, 64);
1698 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
1699 extent_root_level
, 8);
1701 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
1703 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
1705 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
1708 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
1710 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
1712 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
1715 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
1717 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
1719 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
1720 csum_root_level
, 8);
1721 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
1723 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
1725 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
1728 /* struct btrfs_super_block */
1730 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1731 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1732 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1734 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1735 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1736 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1737 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1738 struct btrfs_super_block
, chunk_root_generation
, 64);
1739 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1741 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1743 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1744 chunk_root_level
, 8);
1745 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1747 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1748 log_root_transid
, 64);
1749 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1751 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1753 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1755 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1757 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1759 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1761 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1763 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1764 root_dir_objectid
, 64);
1765 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1767 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1769 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1771 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1772 incompat_flags
, 64);
1773 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1775 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
1776 cache_generation
, 64);
1778 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1780 int t
= btrfs_super_csum_type(s
);
1781 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1782 return btrfs_csum_sizes
[t
];
1785 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1787 return offsetof(struct btrfs_leaf
, items
);
1790 /* struct btrfs_file_extent_item */
1791 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1792 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1794 static inline unsigned long btrfs_file_extent_inline_start(struct
1795 btrfs_file_extent_item
*e
)
1797 unsigned long offset
= (unsigned long)e
;
1798 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1802 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1804 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1807 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1809 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1811 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1813 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
, struct btrfs_file_extent_item
,
1815 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1816 disk_num_bytes
, 64);
1817 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1819 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
, struct btrfs_file_extent_item
,
1821 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1823 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
, struct btrfs_file_extent_item
,
1825 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1827 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1829 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1831 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
, struct btrfs_file_extent_item
,
1833 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1835 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1836 other_encoding
, 16);
1838 /* this returns the number of file bytes represented by the inline item.
1839 * If an item is compressed, this is the uncompressed size
1841 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1842 struct btrfs_file_extent_item
*e
)
1844 return btrfs_file_extent_ram_bytes(eb
, e
);
1848 * this returns the number of bytes used by the item on disk, minus the
1849 * size of any extent headers. If a file is compressed on disk, this is
1850 * the compressed size
1852 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1853 struct btrfs_item
*e
)
1855 unsigned long offset
;
1856 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1857 return btrfs_item_size(eb
, e
) - offset
;
1860 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1862 return root
->leafsize
;
1863 return root
->nodesize
;
1866 /* helper function to cast into the data area of the leaf. */
1867 #define btrfs_item_ptr(leaf, slot, type) \
1868 ((type *)(btrfs_leaf_data(leaf) + \
1869 btrfs_item_offset_nr(leaf, slot)))
1871 #define btrfs_item_ptr_offset(leaf, slot) \
1872 ((unsigned long)(btrfs_leaf_data(leaf) + \
1873 btrfs_item_offset_nr(leaf, slot)))
1876 int btrfs_fix_block_accounting(struct btrfs_trans_handle
*trans
,
1877 struct btrfs_root
*root
);
1878 int btrfs_check_block_accounting(struct btrfs_root
*root
);
1879 void btrfs_pin_extent(struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 num_bytes
);
1880 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1881 struct btrfs_root
*root
);
1882 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1883 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1884 btrfs_fs_info
*info
,
1886 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1887 struct btrfs_block_group_cache
1888 *hint
, u64 search_start
,
1889 int data
, int owner
);
1890 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1891 struct btrfs_root
*root
,
1892 u32 blocksize
, u64 root_objectid
,
1893 struct btrfs_disk_key
*key
, int level
,
1894 u64 hint
, u64 empty_size
);
1895 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1896 struct btrfs_root
*root
,
1897 u64 num_bytes
, u64 parent
,
1898 u64 root_objectid
, u64 ref_generation
,
1899 u64 owner
, u64 empty_size
, u64 hint_byte
,
1900 u64 search_end
, struct btrfs_key
*ins
, int data
);
1901 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
1902 struct btrfs_root
*root
, u64 bytenr
,
1903 u64 num_bytes
, u64
*refs
, u64
*flags
);
1904 int btrfs_set_block_flags(struct btrfs_trans_handle
*trans
,
1905 struct btrfs_root
*root
,
1906 u64 bytenr
, u64 num_bytes
, u64 flags
);
1907 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1908 struct extent_buffer
*buf
, int record_parent
);
1909 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1910 struct extent_buffer
*buf
, int record_parent
);
1911 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
1912 struct btrfs_root
*root
,
1913 u64 bytenr
, u64 num_bytes
, u64 parent
,
1914 u64 root_objectid
, u64 owner
, u64 offset
);
1915 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1916 struct btrfs_root
*root
,
1917 struct extent_io_tree
*unpin
);
1918 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1919 struct btrfs_root
*root
,
1920 u64 bytenr
, u64 num_bytes
, u64 parent
,
1921 u64 root_objectid
, u64 ref_generation
,
1922 u64 owner_objectid
);
1923 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1924 struct btrfs_root
*root
, u64 bytenr
,
1925 u64 orig_parent
, u64 parent
,
1926 u64 root_objectid
, u64 ref_generation
,
1927 u64 owner_objectid
);
1928 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1929 struct btrfs_root
*root
);
1930 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1931 int btrfs_read_block_groups(struct btrfs_root
*root
);
1932 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1933 struct btrfs_root
*root
, u64 bytes_used
,
1934 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1936 int btrfs_make_block_groups(struct btrfs_trans_handle
*trans
,
1937 struct btrfs_root
*root
);
1938 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
1939 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
1940 int alloc
, int mark_free
);
1942 int btrfs_del_ptr(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1943 struct btrfs_path
*path
, int level
, int slot
);
1944 int btrfs_check_node(struct btrfs_root
*root
,
1945 struct btrfs_disk_key
*parent_key
,
1946 struct extent_buffer
*buf
);
1947 int btrfs_check_leaf(struct btrfs_root
*root
,
1948 struct btrfs_disk_key
*parent_key
,
1949 struct extent_buffer
*buf
);
1950 int btrfs_fsck_reinit_root(struct btrfs_trans_handle
*trans
,
1951 struct btrfs_root
*root
);
1952 void reada_for_search(struct btrfs_root
*root
, struct btrfs_path
*path
,
1953 int level
, int slot
, u64 objectid
);
1954 struct extent_buffer
*read_node_slot(struct btrfs_root
*root
,
1955 struct extent_buffer
*parent
, int slot
);
1956 int btrfs_previous_item(struct btrfs_root
*root
,
1957 struct btrfs_path
*path
, u64 min_objectid
,
1959 int btrfs_comp_keys(struct btrfs_disk_key
*disk
, struct btrfs_key
*k2
);
1960 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1961 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1962 struct extent_buffer
*parent
, int parent_slot
,
1963 struct extent_buffer
**cow_ret
);
1964 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1965 struct btrfs_root
*root
,
1966 struct extent_buffer
*buf
,
1967 struct extent_buffer
*parent
, int parent_slot
,
1968 struct extent_buffer
**cow_ret
,
1969 u64 search_start
, u64 empty_size
);
1970 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1971 struct btrfs_root
*root
,
1972 struct extent_buffer
*buf
,
1973 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1974 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1975 *root
, struct btrfs_path
*path
, u32 data_size
);
1976 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1977 struct btrfs_root
*root
,
1978 struct btrfs_path
*path
,
1979 u32 new_size
, int from_end
);
1980 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
1981 struct btrfs_root
*root
,
1982 struct btrfs_path
*path
,
1983 struct btrfs_key
*new_key
,
1984 unsigned long split_offset
);
1985 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1986 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1988 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1989 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1990 int start_slot
, int cache_only
, u64
*last_ret
,
1991 struct btrfs_key
*progress
);
1992 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1993 struct btrfs_path
*btrfs_alloc_path(void);
1994 void btrfs_free_path(struct btrfs_path
*p
);
1995 void btrfs_init_path(struct btrfs_path
*p
);
1996 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1997 struct btrfs_path
*path
, int slot
, int nr
);
1999 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2000 struct btrfs_root
*root
,
2001 struct btrfs_path
*path
)
2003 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2006 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2007 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2008 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2009 struct btrfs_root
*root
,
2010 struct btrfs_path
*path
,
2011 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2013 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2014 struct btrfs_root
*root
,
2015 struct btrfs_path
*path
,
2016 struct btrfs_key
*key
,
2019 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2022 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2023 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2024 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2025 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2027 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2028 struct btrfs_root
*root
, struct btrfs_path
*path
,
2029 struct btrfs_key
*new_key
);
2032 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2033 struct btrfs_root
*tree_root
,
2034 u64 root_id
, u8 type
, u64 ref_id
,
2035 u64 dirid
, u64 sequence
,
2036 const char *name
, int name_len
);
2037 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2038 struct btrfs_key
*key
);
2039 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2040 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2042 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2043 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2045 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2046 btrfs_root_item
*item
, struct btrfs_key
*key
);
2047 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
2048 struct btrfs_root
*latest_root
);
2050 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2051 *root
, const char *name
, int name_len
, u64 dir
,
2052 struct btrfs_key
*location
, u8 type
, u64 index
);
2053 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2054 struct btrfs_root
*root
,
2055 struct btrfs_path
*path
, u64 dir
,
2056 const char *name
, int name_len
,
2058 struct btrfs_dir_item
*
2059 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2060 struct btrfs_root
*root
,
2061 struct btrfs_path
*path
, u64 dir
,
2062 u64 objectid
, const char *name
, int name_len
,
2064 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2065 struct btrfs_path
*path
,
2066 const char *name
, int name_len
);
2067 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2068 struct btrfs_root
*root
,
2069 struct btrfs_path
*path
,
2070 struct btrfs_dir_item
*di
);
2071 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2072 struct btrfs_root
*root
, const char *name
,
2073 u16 name_len
, const void *data
, u16 data_len
,
2075 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2076 struct btrfs_root
*root
,
2077 struct btrfs_path
*path
, u64 dir
,
2078 const char *name
, u16 name_len
,
2081 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2082 struct btrfs_root
*fs_root
,
2083 u64 dirid
, u64
*objectid
);
2084 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2087 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2088 struct btrfs_root
*root
,
2089 const char *name
, int name_len
,
2090 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2091 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2092 struct btrfs_root
*root
,
2093 const char *name
, int name_len
,
2094 u64 inode_objectid
, u64 ref_objectid
);
2095 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2096 struct btrfs_root
*root
,
2097 struct btrfs_path
*path
, u64 objectid
);
2098 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2099 *root
, u64 objectid
, struct btrfs_inode_item
2101 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2102 *root
, struct btrfs_path
*path
,
2103 struct btrfs_key
*location
, int mod
);
2106 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2107 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2108 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2109 struct btrfs_root
*root
,
2110 u64 objectid
, u64 pos
, u64 offset
,
2113 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
2114 struct btrfs_root
*root
, u64 objectid
,
2115 u64 offset
, char *buffer
, size_t size
);
2116 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2117 struct btrfs_root
*root
,
2118 struct btrfs_path
*path
, u64 objectid
,
2119 u64 bytenr
, int mod
);
2120 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
2121 struct btrfs_root
*root
, u64 alloc_end
,
2122 u64 bytenr
, char *data
, size_t len
);
2123 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2124 struct btrfs_root
*root
,
2125 struct btrfs_path
*path
,
2126 u64 bytenr
, int cow
);
2127 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2128 struct btrfs_root
*root
, struct btrfs_path
*path
,