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
62 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
65 /* for storing balance parameters in the root tree */
66 #define BTRFS_BALANCE_OBJECTID -4ULL
68 /* oprhan objectid for tracking unlinked/truncated files */
69 #define BTRFS_ORPHAN_OBJECTID -5ULL
71 /* does write ahead logging to speed up fsyncs */
72 #define BTRFS_TREE_LOG_OBJECTID -6ULL
73 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
76 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
77 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
80 * extent checksums all have this objectid
81 * this allows them to share the logging tree
84 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
86 /* For storing free space cache */
87 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
90 * The inode number assigned to the special inode for sotring
93 #define BTRFS_FREE_INO_OBJECTID -12ULL
95 /* dummy objectid represents multiple objectids */
96 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
99 * All files have objectids in this range.
101 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
102 #define BTRFS_LAST_FREE_OBJECTID -256ULL
103 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
108 * the device items go into the chunk tree. The key is in the form
109 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
111 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
114 * we can actually store much bigger names, but lets not confuse the rest
117 #define BTRFS_NAME_LEN 255
119 /* 32 bytes in various csum fields */
120 #define BTRFS_CSUM_SIZE 32
123 #define BTRFS_CSUM_TYPE_CRC32 0
125 static int btrfs_csum_sizes
[] = { 4, 0 };
127 /* four bytes for CRC32 */
128 #define BTRFS_CRC32_SIZE 4
129 #define BTRFS_EMPTY_DIR_SIZE 0
131 #define BTRFS_FT_UNKNOWN 0
132 #define BTRFS_FT_REG_FILE 1
133 #define BTRFS_FT_DIR 2
134 #define BTRFS_FT_CHRDEV 3
135 #define BTRFS_FT_BLKDEV 4
136 #define BTRFS_FT_FIFO 5
137 #define BTRFS_FT_SOCK 6
138 #define BTRFS_FT_SYMLINK 7
139 #define BTRFS_FT_XATTR 8
140 #define BTRFS_FT_MAX 9
143 * the key defines the order in the tree, and so it also defines (optimal)
144 * block layout. objectid corresonds to the inode number. The flags
145 * tells us things about the object, and is a kind of stream selector.
146 * so for a given inode, keys with flags of 1 might refer to the inode
147 * data, flags of 2 may point to file data in the btree and flags == 3
148 * may point to extents.
150 * offset is the starting byte offset for this key in the stream.
152 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
153 * in cpu native order. Otherwise they are identical and their sizes
154 * should be the same (ie both packed)
156 struct btrfs_disk_key
{
160 } __attribute__ ((__packed__
));
166 } __attribute__ ((__packed__
));
168 struct btrfs_mapping_tree
{
169 struct cache_tree cache_tree
;
172 #define BTRFS_UUID_SIZE 16
173 struct btrfs_dev_item
{
174 /* the internal btrfs device id */
177 /* size of the device */
183 /* optimal io alignment for this device */
186 /* optimal io width for this device */
189 /* minimal io size for this device */
192 /* type and info about this device */
195 /* expected generation for this device */
199 * starting byte of this partition on the device,
200 * to allowr for stripe alignment in the future
204 /* grouping information for allocation decisions */
207 /* seek speed 0-100 where 100 is fastest */
210 /* bandwidth 0-100 where 100 is fastest */
213 /* btrfs generated uuid for this device */
214 u8 uuid
[BTRFS_UUID_SIZE
];
216 /* uuid of FS who owns this device */
217 u8 fsid
[BTRFS_UUID_SIZE
];
218 } __attribute__ ((__packed__
));
220 struct btrfs_stripe
{
223 u8 dev_uuid
[BTRFS_UUID_SIZE
];
224 } __attribute__ ((__packed__
));
227 /* size of this chunk in bytes */
230 /* objectid of the root referencing this chunk */
236 /* optimal io alignment for this chunk */
239 /* optimal io width for this chunk */
242 /* minimal io size for this chunk */
245 /* 2^16 stripes is quite a lot, a second limit is the size of a single
250 /* sub stripes only matter for raid10 */
252 struct btrfs_stripe stripe
;
253 /* additional stripes go here */
254 } __attribute__ ((__packed__
));
256 struct btrfs_free_space_header
{
257 struct btrfs_disk_key location
;
261 } __attribute__ ((__packed__
));
263 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
265 BUG_ON(num_stripes
== 0);
266 return sizeof(struct btrfs_chunk
) +
267 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
270 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
271 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
272 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
273 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
275 #define BTRFS_BACKREF_REV_MAX 256
276 #define BTRFS_BACKREF_REV_SHIFT 56
277 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
278 BTRFS_BACKREF_REV_SHIFT)
280 #define BTRFS_OLD_BACKREF_REV 0
281 #define BTRFS_MIXED_BACKREF_REV 1
284 * every tree block (leaf or node) starts with this header.
286 struct btrfs_header
{
287 /* these first four must match the super block */
288 u8 csum
[BTRFS_CSUM_SIZE
];
289 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
290 __le64 bytenr
; /* which block this node is supposed to live in */
293 /* allowed to be different from the super from here on down */
294 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
299 } __attribute__ ((__packed__
));
301 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
302 sizeof(struct btrfs_header)) / \
303 sizeof(struct btrfs_key_ptr))
304 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
305 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
306 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
307 sizeof(struct btrfs_item) - \
308 sizeof(struct btrfs_file_extent_item))
309 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
310 sizeof(struct btrfs_item) -\
311 sizeof(struct btrfs_dir_item))
315 * this is a very generous portion of the super block, giving us
316 * room to translate 14 chunks with 3 stripes each.
318 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
319 #define BTRFS_LABEL_SIZE 256
322 * just in case we somehow lose the roots and are not able to mount,
323 * we store an array of the roots from previous transactions
326 #define BTRFS_NUM_BACKUP_ROOTS 4
327 struct btrfs_root_backup
{
329 __le64 tree_root_gen
;
332 __le64 chunk_root_gen
;
335 __le64 extent_root_gen
;
344 __le64 csum_root_gen
;
354 u8 extent_root_level
;
358 /* future and to align */
360 } __attribute__ ((__packed__
));
363 * the super block basically lists the main trees of the FS
364 * it currently lacks any block count etc etc
366 struct btrfs_super_block
{
367 u8 csum
[BTRFS_CSUM_SIZE
];
368 /* the first 3 fields must match struct btrfs_header */
369 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
370 __le64 bytenr
; /* this block number */
373 /* allowed to be different from the btrfs_header from here own down */
380 /* this will help find the new super based on the log root */
381 __le64 log_root_transid
;
384 __le64 root_dir_objectid
;
390 __le32 sys_chunk_array_size
;
391 __le64 chunk_root_generation
;
393 __le64 compat_ro_flags
;
394 __le64 incompat_flags
;
399 struct btrfs_dev_item dev_item
;
401 char label
[BTRFS_LABEL_SIZE
];
403 __le64 cache_generation
;
405 /* future expansion */
407 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
408 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
409 } __attribute__ ((__packed__
));
412 * Compat flags that we support. If any incompat flags are set other than the
413 * ones specified below then we will fail to mount
415 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
416 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
417 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
418 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
420 * some patches floated around with a second compression method
421 * lets save that incompat here for when they do get in
422 * Note we don't actually support it, we're just reserving the
425 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
428 * older kernels tried to do bigger metadata blocks, but the
429 * code was pretty buggy. Lets not let them try anymore.
431 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
434 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
435 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
436 #define BTRFS_FEATURE_INCOMPAT_SUPP \
437 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
438 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
439 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
440 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
441 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
444 * A leaf is full of items. offset and size tell us where to find
445 * the item in the leaf (relative to the start of the data area)
448 struct btrfs_disk_key key
;
451 } __attribute__ ((__packed__
));
454 * leaves have an item area and a data area:
455 * [item0, item1....itemN] [free space] [dataN...data1, data0]
457 * The data is separate from the items to get the keys closer together
461 struct btrfs_header header
;
462 struct btrfs_item items
[];
463 } __attribute__ ((__packed__
));
466 * all non-leaf blocks are nodes, they hold only keys and pointers to
469 struct btrfs_key_ptr
{
470 struct btrfs_disk_key key
;
473 } __attribute__ ((__packed__
));
476 struct btrfs_header header
;
477 struct btrfs_key_ptr ptrs
[];
478 } __attribute__ ((__packed__
));
481 * btrfs_paths remember the path taken from the root down to the leaf.
482 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
483 * to any other levels that are present.
485 * The slots array records the index of the item or block pointer
486 * used while walking the tree.
490 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
491 int slots
[BTRFS_MAX_LEVEL
];
492 /* if there is real range locking, this locks field will change */
493 int locks
[BTRFS_MAX_LEVEL
];
495 /* keep some upper locks as we walk down */
499 * set by btrfs_split_item, tells search_slot to keep all locks
500 * and to force calls to keep space in the nodes
502 unsigned int search_for_split
:1;
503 unsigned int keep_locks
:1;
504 unsigned int skip_locking
:1;
505 unsigned int leave_spinning
:1;
509 * items in the extent btree are used to record the objectid of the
510 * owner of the block and the number of references
513 struct btrfs_extent_item
{
517 } __attribute__ ((__packed__
));
519 struct btrfs_extent_item_v0
{
521 } __attribute__ ((__packed__
));
523 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
524 sizeof(struct btrfs_item))
526 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
527 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
529 /* following flags only apply to tree blocks */
531 /* use full backrefs for extent pointers in the block*/
532 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
534 struct btrfs_tree_block_info
{
535 struct btrfs_disk_key key
;
537 } __attribute__ ((__packed__
));
539 struct btrfs_extent_data_ref
{
544 } __attribute__ ((__packed__
));
546 struct btrfs_shared_data_ref
{
548 } __attribute__ ((__packed__
));
550 struct btrfs_extent_inline_ref
{
553 } __attribute__ ((__packed__
));
555 struct btrfs_extent_ref_v0
{
560 } __attribute__ ((__packed__
));
562 /* dev extents record free space on individual devices. The owner
563 * field points back to the chunk allocation mapping tree that allocated
564 * the extent. The chunk tree uuid field is a way to double check the owner
566 struct btrfs_dev_extent
{
568 __le64 chunk_objectid
;
571 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
572 } __attribute__ ((__packed__
));
574 struct btrfs_inode_ref
{
578 } __attribute__ ((__packed__
));
580 struct btrfs_timespec
{
583 } __attribute__ ((__packed__
));
586 BTRFS_COMPRESS_NONE
= 0,
587 BTRFS_COMPRESS_ZLIB
= 1,
588 BTRFS_COMPRESS_LZO
= 2,
589 BTRFS_COMPRESS_TYPES
= 2,
590 BTRFS_COMPRESS_LAST
= 3,
591 } btrfs_compression_type
;
593 /* we don't understand any encryption methods right now */
595 BTRFS_ENCRYPTION_NONE
= 0,
596 BTRFS_ENCRYPTION_LAST
= 1,
597 } btrfs_encryption_type
;
599 struct btrfs_inode_item
{
600 /* nfs style generation number */
602 /* transid that last touched this inode */
614 /* modification sequence number for NFS */
618 * a little future expansion, for more than this we can
619 * just grow the inode item and version it
622 struct btrfs_timespec atime
;
623 struct btrfs_timespec ctime
;
624 struct btrfs_timespec mtime
;
625 struct btrfs_timespec otime
;
626 } __attribute__ ((__packed__
));
628 struct btrfs_dir_log_item
{
630 } __attribute__ ((__packed__
));
632 struct btrfs_dir_item
{
633 struct btrfs_disk_key location
;
638 } __attribute__ ((__packed__
));
640 struct btrfs_root_item
{
641 struct btrfs_inode_item inode
;
647 __le64 last_snapshot
;
650 struct btrfs_disk_key drop_progress
;
655 * The following fields appear after subvol_uuids+subvol_times
660 * This generation number is used to test if the new fields are valid
661 * and up to date while reading the root item. Everytime the root item
662 * is written out, the "generation" field is copied into this field. If
663 * anyone ever mounted the fs with an older kernel, we will have
664 * mismatching generation values here and thus must invalidate the
665 * new fields. See btrfs_update_root and btrfs_find_last_root for
667 * the offset of generation_v2 is also used as the start for the memset
668 * when invalidating the fields.
670 __le64 generation_v2
;
671 u8 uuid
[BTRFS_UUID_SIZE
];
672 u8 parent_uuid
[BTRFS_UUID_SIZE
];
673 u8 received_uuid
[BTRFS_UUID_SIZE
];
674 __le64 ctransid
; /* updated when an inode changes */
675 __le64 otransid
; /* trans when created */
676 __le64 stransid
; /* trans when sent. non-zero for received subvol */
677 __le64 rtransid
; /* trans when received. non-zero for received subvol */
678 struct btrfs_timespec ctime
;
679 struct btrfs_timespec otime
;
680 struct btrfs_timespec stime
;
681 struct btrfs_timespec rtime
;
682 __le64 reserved
[8]; /* for future */
683 } __attribute__ ((__packed__
));
686 * this is used for both forward and backward root refs
688 struct btrfs_root_ref
{
692 } __attribute__ ((__packed__
));
694 #define BTRFS_FILE_EXTENT_INLINE 0
695 #define BTRFS_FILE_EXTENT_REG 1
696 #define BTRFS_FILE_EXTENT_PREALLOC 2
698 struct btrfs_file_extent_item
{
700 * transaction id that created this extent
704 * max number of bytes to hold this extent in ram
705 * when we split a compressed extent we can't know how big
706 * each of the resulting pieces will be. So, this is
707 * an upper limit on the size of the extent in ram instead of
713 * 32 bits for the various ways we might encode the data,
714 * including compression and encryption. If any of these
715 * are set to something a given disk format doesn't understand
716 * it is treated like an incompat flag for reading and writing,
721 __le16 other_encoding
; /* spare for later use */
723 /* are we inline data or a real extent? */
727 * disk space consumed by the extent, checksum blocks are included
731 __le64 disk_num_bytes
;
733 * the logical offset in file blocks (no csums)
734 * this extent record is for. This allows a file extent to point
735 * into the middle of an existing extent on disk, sharing it
736 * between two snapshots (useful if some bytes in the middle of the
737 * extent have changed
741 * the logical number of file blocks (no csums included)
745 } __attribute__ ((__packed__
));
747 struct btrfs_csum_item
{
749 } __attribute__ ((__packed__
));
751 /* tag for the radix tree of block groups in ram */
752 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
753 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
754 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
755 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
756 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
757 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
758 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
759 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
761 /* used in struct btrfs_balance_args fields */
762 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
764 #define BTRFS_QGROUP_STATUS_OFF 0
765 #define BTRFS_QGROUP_STATUS_ON 1
766 #define BTRFS_QGROUP_STATUS_SCANNING 2
768 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1 << 0)
770 struct btrfs_qgroup_status_item
{
774 __le64 scan
; /* progress during scanning */
775 } __attribute__ ((__packed__
));
777 struct btrfs_block_group_item
{
779 __le64 chunk_objectid
;
781 } __attribute__ ((__packed__
));
783 struct btrfs_qgroup_info_item
{
786 __le64 referenced_compressed
;
788 __le64 exclusive_compressed
;
789 } __attribute__ ((__packed__
));
791 /* flags definition for qgroup limits */
792 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
793 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
794 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
795 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
796 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
797 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
799 struct btrfs_qgroup_limit_item
{
801 __le64 max_referenced
;
802 __le64 max_exclusive
;
803 __le64 rsv_referenced
;
804 __le64 rsv_exclusive
;
805 } __attribute__ ((__packed__
));
807 struct btrfs_space_info
{
813 struct list_head list
;
816 struct btrfs_block_group_cache
{
817 struct cache_extent cache
;
818 struct btrfs_key key
;
819 struct btrfs_block_group_item item
;
820 struct btrfs_space_info
*space_info
;
827 struct btrfs_extent_ops
{
828 int (*alloc_extent
)(struct btrfs_root
*root
, u64 num_bytes
,
829 u64 hint_byte
, struct btrfs_key
*ins
);
830 int (*free_extent
)(struct btrfs_root
*root
, u64 bytenr
,
835 struct btrfs_fs_devices
;
836 struct btrfs_fs_info
{
837 u8 fsid
[BTRFS_FSID_SIZE
];
838 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
839 struct btrfs_root
*fs_root
;
840 struct btrfs_root
*extent_root
;
841 struct btrfs_root
*tree_root
;
842 struct btrfs_root
*chunk_root
;
843 struct btrfs_root
*dev_root
;
844 struct btrfs_root
*csum_root
;
846 struct cache_tree fs_root_cache
;
848 /* the log root tree is a directory of all the other log roots */
849 struct btrfs_root
*log_root_tree
;
851 struct extent_io_tree extent_cache
;
852 struct extent_io_tree free_space_cache
;
853 struct extent_io_tree block_group_cache
;
854 struct extent_io_tree pinned_extents
;
855 struct extent_io_tree pending_del
;
856 struct extent_io_tree extent_ins
;
858 /* logical->physical extent mapping */
859 struct btrfs_mapping_tree mapping_tree
;
862 u64 last_trans_committed
;
864 u64 avail_data_alloc_bits
;
865 u64 avail_metadata_alloc_bits
;
866 u64 avail_system_alloc_bits
;
867 u64 data_alloc_profile
;
868 u64 metadata_alloc_profile
;
869 u64 system_alloc_profile
;
872 struct btrfs_trans_handle
*running_transaction
;
873 struct btrfs_super_block super_copy
;
874 struct mutex fs_mutex
;
879 struct btrfs_extent_ops
*extent_ops
;
880 struct list_head dirty_cowonly_roots
;
882 struct btrfs_fs_devices
*fs_devices
;
883 struct list_head space_info
;
886 int (*free_extent_hook
)(struct btrfs_trans_handle
*trans
,
887 struct btrfs_root
*root
,
888 u64 bytenr
, u64 num_bytes
, u64 parent
,
889 u64 root_objectid
, u64 owner
, u64 offset
,
891 struct cache_tree
*fsck_extent_cache
;
892 struct cache_tree
*corrupt_blocks
;
896 * in ram representation of the tree. extent_root is used for all allocations
897 * and for the extent tree extent_root root.
900 struct extent_buffer
*node
;
901 struct extent_buffer
*commit_root
;
902 struct btrfs_root_item root_item
;
903 struct btrfs_key root_key
;
904 struct btrfs_fs_info
*fs_info
;
908 /* data allocations are done in sectorsize units */
911 /* node allocations are done in nodesize units */
914 /* leaf allocations are done in leafsize units */
917 /* leaf allocations are done in leafsize units */
926 u64 last_inode_alloc
;
928 /* the dirty list is only used by non-reference counted roots */
929 struct list_head dirty_list
;
930 struct cache_extent cache
;
934 * inode items have the data typically returned from stat and store other
935 * info about object characteristics. There is one for every file and dir in
938 #define BTRFS_INODE_ITEM_KEY 1
939 #define BTRFS_INODE_REF_KEY 12
940 #define BTRFS_XATTR_ITEM_KEY 24
941 #define BTRFS_ORPHAN_ITEM_KEY 48
943 #define BTRFS_DIR_LOG_ITEM_KEY 60
944 #define BTRFS_DIR_LOG_INDEX_KEY 72
946 * dir items are the name -> inode pointers in a directory. There is one
947 * for every name in a directory.
949 #define BTRFS_DIR_ITEM_KEY 84
950 #define BTRFS_DIR_INDEX_KEY 96
953 * extent data is for file data
955 #define BTRFS_EXTENT_DATA_KEY 108
958 * csum items have the checksums for data in the extents
960 #define BTRFS_CSUM_ITEM_KEY 120
962 * extent csums are stored in a separate tree and hold csums for
963 * an entire extent on disk.
965 #define BTRFS_EXTENT_CSUM_KEY 128
968 * root items point to tree roots. There are typically in the root
969 * tree used by the super block to find all the other trees
971 #define BTRFS_ROOT_ITEM_KEY 132
974 * root backrefs tie subvols and snapshots to the directory entries that
977 #define BTRFS_ROOT_BACKREF_KEY 144
980 * root refs make a fast index for listing all of the snapshots and
981 * subvolumes referenced by a given root. They point directly to the
982 * directory item in the root that references the subvol
984 #define BTRFS_ROOT_REF_KEY 156
987 * extent items are in the extent map tree. These record which blocks
988 * are used, and how many references there are to each block
990 #define BTRFS_EXTENT_ITEM_KEY 168
992 #define BTRFS_TREE_BLOCK_REF_KEY 176
994 #define BTRFS_EXTENT_DATA_REF_KEY 178
996 /* old style extent backrefs */
997 #define BTRFS_EXTENT_REF_V0_KEY 180
999 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1001 #define BTRFS_SHARED_DATA_REF_KEY 184
1005 * block groups give us hints into the extent allocation trees. Which
1006 * blocks are free etc etc
1008 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1010 #define BTRFS_DEV_EXTENT_KEY 204
1011 #define BTRFS_DEV_ITEM_KEY 216
1012 #define BTRFS_CHUNK_ITEM_KEY 228
1014 #define BTRFS_BALANCE_ITEM_KEY 248
1019 #define BTRFS_QGROUP_STATUS_KEY 240
1020 #define BTRFS_QGROUP_INFO_KEY 242
1021 #define BTRFS_QGROUP_LIMIT_KEY 244
1022 #define BTRFS_QGROUP_RELATION_KEY 246
1025 * string items are for debugging. They just store a short string of
1028 #define BTRFS_STRING_ITEM_KEY 253
1032 #define BTRFS_INODE_NODATASUM (1 << 0)
1033 #define BTRFS_INODE_NODATACOW (1 << 1)
1034 #define BTRFS_INODE_READONLY (1 << 2)
1036 #define read_eb_member(eb, ptr, type, member, result) ( \
1037 read_extent_buffer(eb, (char *)(result), \
1038 ((unsigned long)(ptr)) + \
1039 offsetof(type, member), \
1040 sizeof(((type *)0)->member)))
1042 #define write_eb_member(eb, ptr, type, member, result) ( \
1043 write_extent_buffer(eb, (char *)(result), \
1044 ((unsigned long)(ptr)) + \
1045 offsetof(type, member), \
1046 sizeof(((type *)0)->member)))
1048 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1049 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1051 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1052 return le##bits##_to_cpu(h->member); \
1054 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1057 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1058 h->member = cpu_to_le##bits(val); \
1061 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1062 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
1065 unsigned long offset = (unsigned long)s; \
1066 type *p = (type *) (eb->data + offset); \
1067 return le##bits##_to_cpu(p->member); \
1069 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1070 type *s, u##bits val) \
1072 unsigned long offset = (unsigned long)s; \
1073 type *p = (type *) (eb->data + offset); \
1074 p->member = cpu_to_le##bits(val); \
1077 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1078 static inline u##bits btrfs_##name(type *s) \
1080 return le##bits##_to_cpu(s->member); \
1082 static inline void btrfs_set_##name(type *s, u##bits val) \
1084 s->member = cpu_to_le##bits(val); \
1087 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1088 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1089 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1090 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1091 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1092 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1094 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1095 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1096 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1097 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1098 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1099 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1101 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1102 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1104 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1106 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1108 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1110 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1112 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1113 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1115 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1117 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1119 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1122 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1124 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1127 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1129 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1132 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1133 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1134 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1135 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1136 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1137 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1138 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1139 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1140 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1141 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1142 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1144 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1146 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1149 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1150 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1151 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1153 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1155 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1157 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1159 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1160 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1162 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1164 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1165 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1167 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1170 unsigned long offset
= (unsigned long)c
;
1171 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1172 offset
+= nr
* sizeof(struct btrfs_stripe
);
1173 return (struct btrfs_stripe
*)offset
;
1176 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1178 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1181 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1182 struct btrfs_chunk
*c
, int nr
)
1184 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1187 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1188 struct btrfs_chunk
*c
, int nr
,
1191 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1194 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1195 struct btrfs_chunk
*c
, int nr
)
1197 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1200 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1201 struct btrfs_chunk
*c
, int nr
,
1204 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1207 /* struct btrfs_block_group_item */
1208 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1210 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1212 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1213 struct btrfs_block_group_item
, chunk_objectid
, 64);
1215 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1216 struct btrfs_block_group_item
, chunk_objectid
, 64);
1217 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1218 struct btrfs_block_group_item
, flags
, 64);
1219 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1220 struct btrfs_block_group_item
, flags
, 64);
1222 /* struct btrfs_inode_ref */
1223 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1224 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1225 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1227 /* struct btrfs_inode_item */
1228 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1229 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1230 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1231 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1232 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1233 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1234 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1235 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1236 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1237 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1238 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1239 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1241 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
1242 struct btrfs_inode_item
, generation
, 64);
1243 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
,
1244 struct btrfs_inode_item
, generation
, 64);
1245 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
1246 struct btrfs_inode_item
, size
, 64);
1247 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
,
1248 struct btrfs_inode_item
, nbytes
, 64);
1249 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
1250 struct btrfs_inode_item
, block_group
, 64);
1251 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
1252 struct btrfs_inode_item
, nlink
, 32);
1253 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
1254 struct btrfs_inode_item
, uid
, 32);
1255 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
1256 struct btrfs_inode_item
, gid
, 32);
1257 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
1258 struct btrfs_inode_item
, mode
, 32);
1259 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
1260 struct btrfs_inode_item
, rdev
, 64);
1261 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
1262 struct btrfs_inode_item
, flags
, 64);
1264 static inline struct btrfs_timespec
*
1265 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1267 unsigned long ptr
= (unsigned long)inode_item
;
1268 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1269 return (struct btrfs_timespec
*)ptr
;
1272 static inline struct btrfs_timespec
*
1273 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1275 unsigned long ptr
= (unsigned long)inode_item
;
1276 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1277 return (struct btrfs_timespec
*)ptr
;
1280 static inline struct btrfs_timespec
*
1281 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1283 unsigned long ptr
= (unsigned long)inode_item
;
1284 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1285 return (struct btrfs_timespec
*)ptr
;
1288 static inline struct btrfs_timespec
*
1289 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1291 unsigned long ptr
= (unsigned long)inode_item
;
1292 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1293 return (struct btrfs_timespec
*)ptr
;
1296 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1297 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1298 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
1300 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
1303 /* struct btrfs_dev_extent */
1304 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1306 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1307 chunk_objectid
, 64);
1308 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1310 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1312 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1314 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1315 return (u8
*)((unsigned long)dev
+ ptr
);
1319 /* struct btrfs_extent_item */
1320 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1321 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1323 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1325 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1327 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1329 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1330 struct btrfs_tree_block_info
*item
,
1331 struct btrfs_disk_key
*key
)
1333 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1336 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1337 struct btrfs_tree_block_info
*item
,
1338 struct btrfs_disk_key
*key
)
1340 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1343 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1345 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1347 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1349 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1352 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1355 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1357 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1360 static inline u32
btrfs_extent_inline_ref_size(int type
)
1362 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1363 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1364 return sizeof(struct btrfs_extent_inline_ref
);
1365 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1366 return sizeof(struct btrfs_shared_data_ref
) +
1367 sizeof(struct btrfs_extent_inline_ref
);
1368 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1369 return sizeof(struct btrfs_extent_data_ref
) +
1370 offsetof(struct btrfs_extent_inline_ref
, offset
);
1375 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1376 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1378 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1379 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1381 /* struct btrfs_node */
1382 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1383 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1385 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1388 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1389 sizeof(struct btrfs_key_ptr
) * nr
;
1390 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1393 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1397 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1398 sizeof(struct btrfs_key_ptr
) * nr
;
1399 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1402 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1405 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1406 sizeof(struct btrfs_key_ptr
) * nr
;
1407 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1410 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1414 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1415 sizeof(struct btrfs_key_ptr
) * nr
;
1416 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1419 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1421 return offsetof(struct btrfs_node
, ptrs
) +
1422 sizeof(struct btrfs_key_ptr
) * nr
;
1425 static inline void btrfs_node_key(struct extent_buffer
*eb
,
1426 struct btrfs_disk_key
*disk_key
, int nr
)
1429 ptr
= btrfs_node_key_ptr_offset(nr
);
1430 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1431 struct btrfs_key_ptr
, key
, disk_key
);
1434 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1435 struct btrfs_disk_key
*disk_key
, int nr
)
1438 ptr
= btrfs_node_key_ptr_offset(nr
);
1439 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1440 struct btrfs_key_ptr
, key
, disk_key
);
1443 /* struct btrfs_item */
1444 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1445 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1447 static inline unsigned long btrfs_item_nr_offset(int nr
)
1449 return offsetof(struct btrfs_leaf
, items
) +
1450 sizeof(struct btrfs_item
) * nr
;
1453 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1456 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1459 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1460 struct btrfs_item
*item
)
1462 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1465 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1467 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1470 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1472 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1475 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1477 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1480 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1481 struct btrfs_disk_key
*disk_key
, int nr
)
1483 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1484 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1487 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1488 struct btrfs_disk_key
*disk_key
, int nr
)
1490 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1491 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1494 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1497 * struct btrfs_root_ref
1499 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1500 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1501 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1503 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1504 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1505 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1507 /* struct btrfs_dir_item */
1508 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1509 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1510 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1511 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1513 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1515 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1516 struct btrfs_dir_item
*item
,
1517 struct btrfs_disk_key
*key
)
1519 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1522 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1523 struct btrfs_dir_item
*item
,
1524 struct btrfs_disk_key
*key
)
1526 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1529 /* struct btrfs_free_space_header */
1530 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1532 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1534 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1537 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1538 struct btrfs_free_space_header
*h
,
1539 struct btrfs_disk_key
*key
)
1541 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1544 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1545 struct btrfs_free_space_header
*h
,
1546 struct btrfs_disk_key
*key
)
1548 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1551 /* struct btrfs_disk_key */
1552 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1554 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1555 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1557 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1558 struct btrfs_disk_key
*disk
)
1560 cpu
->offset
= le64_to_cpu(disk
->offset
);
1561 cpu
->type
= disk
->type
;
1562 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1565 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1566 struct btrfs_key
*cpu
)
1568 disk
->offset
= cpu_to_le64(cpu
->offset
);
1569 disk
->type
= cpu
->type
;
1570 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1573 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1574 struct btrfs_key
*key
, int nr
)
1576 struct btrfs_disk_key disk_key
;
1577 btrfs_node_key(eb
, &disk_key
, nr
);
1578 btrfs_disk_key_to_cpu(key
, &disk_key
);
1581 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1582 struct btrfs_key
*key
, int nr
)
1584 struct btrfs_disk_key disk_key
;
1585 btrfs_item_key(eb
, &disk_key
, nr
);
1586 btrfs_disk_key_to_cpu(key
, &disk_key
);
1589 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1590 struct btrfs_dir_item
*item
,
1591 struct btrfs_key
*key
)
1593 struct btrfs_disk_key disk_key
;
1594 btrfs_dir_item_key(eb
, item
, &disk_key
);
1595 btrfs_disk_key_to_cpu(key
, &disk_key
);
1599 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1604 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1609 /* struct btrfs_header */
1610 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1611 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1613 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1614 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1615 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1616 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1618 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1620 return (btrfs_header_flags(eb
) & flag
) == flag
;
1623 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1625 u64 flags
= btrfs_header_flags(eb
);
1626 btrfs_set_header_flags(eb
, flags
| flag
);
1627 return (flags
& flag
) == flag
;
1630 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1632 u64 flags
= btrfs_header_flags(eb
);
1633 btrfs_set_header_flags(eb
, flags
& ~flag
);
1634 return (flags
& flag
) == flag
;
1637 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1639 u64 flags
= btrfs_header_flags(eb
);
1640 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1643 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1646 u64 flags
= btrfs_header_flags(eb
);
1647 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1648 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1649 btrfs_set_header_flags(eb
, flags
);
1652 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1654 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1658 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1660 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1664 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1666 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1670 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1672 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1676 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1681 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1686 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1691 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1693 return (btrfs_header_level(eb
) == 0);
1696 /* struct btrfs_root_item */
1697 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1699 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1700 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1701 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1703 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1705 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1706 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1707 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1708 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1709 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1710 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1711 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1712 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1714 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
1716 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
1718 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
1720 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
1722 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
1725 /* struct btrfs_root_backup */
1726 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
1728 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
1730 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
1731 tree_root_level
, 8);
1733 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
1735 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
1736 chunk_root_gen
, 64);
1737 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
1738 chunk_root_level
, 8);
1740 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
1742 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
1743 extent_root_gen
, 64);
1744 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
1745 extent_root_level
, 8);
1747 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
1749 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
1751 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
1754 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
1756 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
1758 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
1761 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
1763 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
1765 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
1766 csum_root_level
, 8);
1767 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
1769 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
1771 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
1774 /* struct btrfs_super_block */
1776 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1777 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1778 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1780 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1781 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1782 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1783 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1784 struct btrfs_super_block
, chunk_root_generation
, 64);
1785 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1787 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1789 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1790 chunk_root_level
, 8);
1791 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1793 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1794 log_root_transid
, 64);
1795 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1797 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1799 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1801 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1803 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1805 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1807 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1809 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1810 root_dir_objectid
, 64);
1811 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1813 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1815 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1817 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1818 incompat_flags
, 64);
1819 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1821 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
1822 cache_generation
, 64);
1824 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1826 int t
= btrfs_super_csum_type(s
);
1827 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1828 return btrfs_csum_sizes
[t
];
1831 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1833 return offsetof(struct btrfs_leaf
, items
);
1836 /* struct btrfs_file_extent_item */
1837 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1838 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1840 static inline unsigned long btrfs_file_extent_inline_start(struct
1841 btrfs_file_extent_item
*e
)
1843 unsigned long offset
= (unsigned long)e
;
1844 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1848 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1850 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1853 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1855 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1857 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1859 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
, struct btrfs_file_extent_item
,
1861 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1862 disk_num_bytes
, 64);
1863 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1865 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
, struct btrfs_file_extent_item
,
1867 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1869 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
, struct btrfs_file_extent_item
,
1871 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1873 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1875 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1877 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
, struct btrfs_file_extent_item
,
1879 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1881 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1882 other_encoding
, 16);
1884 /* btrfs_qgroup_status_item */
1885 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
1887 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
1889 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
1891 BTRFS_SETGET_FUNCS(qgroup_status_scan
, struct btrfs_qgroup_status_item
,
1894 /* btrfs_qgroup_info_item */
1895 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
1897 BTRFS_SETGET_FUNCS(qgroup_info_referenced
, struct btrfs_qgroup_info_item
,
1899 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed
,
1900 struct btrfs_qgroup_info_item
, referenced_compressed
, 64);
1901 BTRFS_SETGET_FUNCS(qgroup_info_exclusive
, struct btrfs_qgroup_info_item
,
1903 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed
,
1904 struct btrfs_qgroup_info_item
, exclusive_compressed
, 64);
1906 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
1907 struct btrfs_qgroup_info_item
, generation
, 64);
1908 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced
,
1909 struct btrfs_qgroup_info_item
, referenced
, 64);
1910 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed
,
1911 struct btrfs_qgroup_info_item
, referenced_compressed
, 64);
1912 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive
,
1913 struct btrfs_qgroup_info_item
, exclusive
, 64);
1914 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed
,
1915 struct btrfs_qgroup_info_item
, exclusive_compressed
, 64);
1917 /* btrfs_qgroup_limit_item */
1918 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
1920 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced
, struct btrfs_qgroup_limit_item
,
1921 max_referenced
, 64);
1922 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive
, struct btrfs_qgroup_limit_item
,
1924 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced
, struct btrfs_qgroup_limit_item
,
1925 rsv_referenced
, 64);
1926 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive
, struct btrfs_qgroup_limit_item
,
1929 /* this returns the number of file bytes represented by the inline item.
1930 * If an item is compressed, this is the uncompressed size
1932 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1933 struct btrfs_file_extent_item
*e
)
1935 return btrfs_file_extent_ram_bytes(eb
, e
);
1939 * this returns the number of bytes used by the item on disk, minus the
1940 * size of any extent headers. If a file is compressed on disk, this is
1941 * the compressed size
1943 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1944 struct btrfs_item
*e
)
1946 unsigned long offset
;
1947 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1948 return btrfs_item_size(eb
, e
) - offset
;
1951 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1953 return root
->leafsize
;
1954 return root
->nodesize
;
1957 /* helper function to cast into the data area of the leaf. */
1958 #define btrfs_item_ptr(leaf, slot, type) \
1959 ((type *)(btrfs_leaf_data(leaf) + \
1960 btrfs_item_offset_nr(leaf, slot)))
1962 #define btrfs_item_ptr_offset(leaf, slot) \
1963 ((unsigned long)(btrfs_leaf_data(leaf) + \
1964 btrfs_item_offset_nr(leaf, slot)))
1967 int btrfs_fix_block_accounting(struct btrfs_trans_handle
*trans
,
1968 struct btrfs_root
*root
);
1969 int btrfs_check_block_accounting(struct btrfs_root
*root
);
1970 void btrfs_pin_extent(struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 num_bytes
);
1971 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1972 struct btrfs_root
*root
);
1973 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1974 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1975 btrfs_fs_info
*info
,
1977 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1978 struct btrfs_block_group_cache
1979 *hint
, u64 search_start
,
1980 int data
, int owner
);
1981 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1982 struct btrfs_root
*root
,
1983 u32 blocksize
, u64 root_objectid
,
1984 struct btrfs_disk_key
*key
, int level
,
1985 u64 hint
, u64 empty_size
);
1986 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1987 struct btrfs_root
*root
,
1988 u64 num_bytes
, u64 parent
,
1989 u64 root_objectid
, u64 ref_generation
,
1990 u64 owner
, u64 empty_size
, u64 hint_byte
,
1991 u64 search_end
, struct btrfs_key
*ins
, int data
);
1992 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
1993 struct btrfs_root
*root
, u64 bytenr
,
1994 u64 num_bytes
, u64
*refs
, u64
*flags
);
1995 int btrfs_set_block_flags(struct btrfs_trans_handle
*trans
,
1996 struct btrfs_root
*root
,
1997 u64 bytenr
, u64 num_bytes
, u64 flags
);
1998 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1999 struct extent_buffer
*buf
, int record_parent
);
2000 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2001 struct extent_buffer
*buf
, int record_parent
);
2002 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2003 struct btrfs_root
*root
,
2004 u64 bytenr
, u64 num_bytes
, u64 parent
,
2005 u64 root_objectid
, u64 owner
, u64 offset
);
2006 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2007 struct btrfs_root
*root
,
2008 struct extent_io_tree
*unpin
);
2009 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2010 struct btrfs_root
*root
,
2011 u64 bytenr
, u64 num_bytes
, u64 parent
,
2012 u64 root_objectid
, u64 ref_generation
,
2013 u64 owner_objectid
);
2014 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
2015 struct btrfs_root
*root
, u64 bytenr
,
2016 u64 orig_parent
, u64 parent
,
2017 u64 root_objectid
, u64 ref_generation
,
2018 u64 owner_objectid
);
2019 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2020 struct btrfs_root
*root
);
2021 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2022 int btrfs_read_block_groups(struct btrfs_root
*root
);
2023 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2024 struct btrfs_root
*root
, u64 bytes_used
,
2025 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2027 int btrfs_make_block_groups(struct btrfs_trans_handle
*trans
,
2028 struct btrfs_root
*root
);
2029 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
2030 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
2031 int alloc
, int mark_free
);
2033 int btrfs_del_ptr(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2034 struct btrfs_path
*path
, int level
, int slot
);
2035 int btrfs_check_node(struct btrfs_root
*root
,
2036 struct btrfs_disk_key
*parent_key
,
2037 struct extent_buffer
*buf
);
2038 int btrfs_check_leaf(struct btrfs_root
*root
,
2039 struct btrfs_disk_key
*parent_key
,
2040 struct extent_buffer
*buf
);
2041 int btrfs_fsck_reinit_root(struct btrfs_trans_handle
*trans
,
2042 struct btrfs_root
*root
);
2043 void reada_for_search(struct btrfs_root
*root
, struct btrfs_path
*path
,
2044 int level
, int slot
, u64 objectid
);
2045 struct extent_buffer
*read_node_slot(struct btrfs_root
*root
,
2046 struct extent_buffer
*parent
, int slot
);
2047 int btrfs_previous_item(struct btrfs_root
*root
,
2048 struct btrfs_path
*path
, u64 min_objectid
,
2050 int btrfs_comp_keys(struct btrfs_disk_key
*disk
, struct btrfs_key
*k2
);
2051 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2052 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2053 struct extent_buffer
*parent
, int parent_slot
,
2054 struct extent_buffer
**cow_ret
);
2055 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2056 struct btrfs_root
*root
,
2057 struct extent_buffer
*buf
,
2058 struct extent_buffer
*parent
, int parent_slot
,
2059 struct extent_buffer
**cow_ret
,
2060 u64 search_start
, u64 empty_size
);
2061 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2062 struct btrfs_root
*root
,
2063 struct extent_buffer
*buf
,
2064 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2065 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2066 *root
, struct btrfs_path
*path
, u32 data_size
);
2067 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2068 struct btrfs_root
*root
,
2069 struct btrfs_path
*path
,
2070 u32 new_size
, int from_end
);
2071 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2072 struct btrfs_root
*root
,
2073 struct btrfs_path
*path
,
2074 struct btrfs_key
*new_key
,
2075 unsigned long split_offset
);
2076 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2077 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2079 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2080 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2081 int start_slot
, int cache_only
, u64
*last_ret
,
2082 struct btrfs_key
*progress
);
2083 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
2084 struct btrfs_path
*btrfs_alloc_path(void);
2085 void btrfs_free_path(struct btrfs_path
*p
);
2086 void btrfs_init_path(struct btrfs_path
*p
);
2087 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2088 struct btrfs_path
*path
, int slot
, int nr
);
2090 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2091 struct btrfs_root
*root
,
2092 struct btrfs_path
*path
)
2094 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2097 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2098 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2099 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2100 struct btrfs_root
*root
,
2101 struct btrfs_path
*path
,
2102 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2104 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2105 struct btrfs_root
*root
,
2106 struct btrfs_path
*path
,
2107 struct btrfs_key
*key
,
2110 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2113 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2114 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2115 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2116 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2118 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2119 struct btrfs_root
*root
, struct btrfs_path
*path
,
2120 struct btrfs_key
*new_key
);
2123 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2124 struct btrfs_root
*tree_root
,
2125 u64 root_id
, u8 type
, u64 ref_id
,
2126 u64 dirid
, u64 sequence
,
2127 const char *name
, int name_len
);
2128 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2129 struct btrfs_key
*key
);
2130 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2131 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2133 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2134 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2136 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2137 btrfs_root_item
*item
, struct btrfs_key
*key
);
2138 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
2139 struct btrfs_root
*latest_root
);
2141 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2142 *root
, const char *name
, int name_len
, u64 dir
,
2143 struct btrfs_key
*location
, u8 type
, u64 index
);
2144 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2145 struct btrfs_root
*root
,
2146 struct btrfs_path
*path
, u64 dir
,
2147 const char *name
, int name_len
,
2149 struct btrfs_dir_item
*
2150 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2151 struct btrfs_root
*root
,
2152 struct btrfs_path
*path
, u64 dir
,
2153 u64 objectid
, const char *name
, int name_len
,
2155 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2156 struct btrfs_path
*path
,
2157 const char *name
, int name_len
);
2158 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2159 struct btrfs_root
*root
,
2160 struct btrfs_path
*path
,
2161 struct btrfs_dir_item
*di
);
2162 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2163 struct btrfs_root
*root
, const char *name
,
2164 u16 name_len
, const void *data
, u16 data_len
,
2166 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2167 struct btrfs_root
*root
,
2168 struct btrfs_path
*path
, u64 dir
,
2169 const char *name
, u16 name_len
,
2172 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2173 struct btrfs_root
*fs_root
,
2174 u64 dirid
, u64
*objectid
);
2175 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2178 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2179 struct btrfs_root
*root
,
2180 const char *name
, int name_len
,
2181 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2182 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2183 struct btrfs_root
*root
,
2184 const char *name
, int name_len
,
2185 u64 inode_objectid
, u64 ref_objectid
);
2186 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2187 struct btrfs_root
*root
,
2188 struct btrfs_path
*path
, u64 objectid
);
2189 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2190 *root
, u64 objectid
, struct btrfs_inode_item
2192 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2193 *root
, struct btrfs_path
*path
,
2194 struct btrfs_key
*location
, int mod
);
2197 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2198 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2199 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2200 struct btrfs_root
*root
,
2201 u64 objectid
, u64 pos
, u64 offset
,
2204 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
2205 struct btrfs_root
*root
, u64 objectid
,
2206 u64 offset
, char *buffer
, size_t size
);
2207 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2208 struct btrfs_root
*root
,
2209 struct btrfs_path
*path
, u64 objectid
,
2210 u64 bytenr
, int mod
);
2211 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
2212 struct btrfs_root
*root
, u64 alloc_end
,
2213 u64 bytenr
, char *data
, size_t len
);
2214 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2215 struct btrfs_root
*root
,
2216 struct btrfs_path
*path
,
2217 u64 bytenr
, int cow
);
2218 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2219 struct btrfs_root
*root
, struct btrfs_path
*path
,