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 * the max metadata block size. This limit is somewhat artificial,
115 * but the memmove costs go through the roof for larger blocks.
117 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
120 * we can actually store much bigger names, but lets not confuse the rest
123 #define BTRFS_NAME_LEN 255
125 /* 32 bytes in various csum fields */
126 #define BTRFS_CSUM_SIZE 32
129 #define BTRFS_CSUM_TYPE_CRC32 0
131 static int btrfs_csum_sizes
[] = { 4, 0 };
133 /* four bytes for CRC32 */
134 #define BTRFS_CRC32_SIZE 4
135 #define BTRFS_EMPTY_DIR_SIZE 0
137 #define BTRFS_FT_UNKNOWN 0
138 #define BTRFS_FT_REG_FILE 1
139 #define BTRFS_FT_DIR 2
140 #define BTRFS_FT_CHRDEV 3
141 #define BTRFS_FT_BLKDEV 4
142 #define BTRFS_FT_FIFO 5
143 #define BTRFS_FT_SOCK 6
144 #define BTRFS_FT_SYMLINK 7
145 #define BTRFS_FT_XATTR 8
146 #define BTRFS_FT_MAX 9
148 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
151 * the key defines the order in the tree, and so it also defines (optimal)
152 * block layout. objectid corresonds to the inode number. The flags
153 * tells us things about the object, and is a kind of stream selector.
154 * so for a given inode, keys with flags of 1 might refer to the inode
155 * data, flags of 2 may point to file data in the btree and flags == 3
156 * may point to extents.
158 * offset is the starting byte offset for this key in the stream.
160 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
161 * in cpu native order. Otherwise they are identical and their sizes
162 * should be the same (ie both packed)
164 struct btrfs_disk_key
{
168 } __attribute__ ((__packed__
));
174 } __attribute__ ((__packed__
));
176 struct btrfs_mapping_tree
{
177 struct cache_tree cache_tree
;
180 #define BTRFS_UUID_SIZE 16
181 struct btrfs_dev_item
{
182 /* the internal btrfs device id */
185 /* size of the device */
191 /* optimal io alignment for this device */
194 /* optimal io width for this device */
197 /* minimal io size for this device */
200 /* type and info about this device */
203 /* expected generation for this device */
207 * starting byte of this partition on the device,
208 * to allowr for stripe alignment in the future
212 /* grouping information for allocation decisions */
215 /* seek speed 0-100 where 100 is fastest */
218 /* bandwidth 0-100 where 100 is fastest */
221 /* btrfs generated uuid for this device */
222 u8 uuid
[BTRFS_UUID_SIZE
];
224 /* uuid of FS who owns this device */
225 u8 fsid
[BTRFS_UUID_SIZE
];
226 } __attribute__ ((__packed__
));
228 struct btrfs_stripe
{
231 u8 dev_uuid
[BTRFS_UUID_SIZE
];
232 } __attribute__ ((__packed__
));
235 /* size of this chunk in bytes */
238 /* objectid of the root referencing this chunk */
244 /* optimal io alignment for this chunk */
247 /* optimal io width for this chunk */
250 /* minimal io size for this chunk */
253 /* 2^16 stripes is quite a lot, a second limit is the size of a single
258 /* sub stripes only matter for raid10 */
260 struct btrfs_stripe stripe
;
261 /* additional stripes go here */
262 } __attribute__ ((__packed__
));
264 struct btrfs_free_space_header
{
265 struct btrfs_disk_key location
;
269 } __attribute__ ((__packed__
));
271 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
273 BUG_ON(num_stripes
== 0);
274 return sizeof(struct btrfs_chunk
) +
275 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
278 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
279 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
280 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
281 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
283 #define BTRFS_BACKREF_REV_MAX 256
284 #define BTRFS_BACKREF_REV_SHIFT 56
285 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
286 BTRFS_BACKREF_REV_SHIFT)
288 #define BTRFS_OLD_BACKREF_REV 0
289 #define BTRFS_MIXED_BACKREF_REV 1
292 * every tree block (leaf or node) starts with this header.
294 struct btrfs_header
{
295 /* these first four must match the super block */
296 u8 csum
[BTRFS_CSUM_SIZE
];
297 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
298 __le64 bytenr
; /* which block this node is supposed to live in */
301 /* allowed to be different from the super from here on down */
302 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
307 } __attribute__ ((__packed__
));
309 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
310 sizeof(struct btrfs_header)) / \
311 sizeof(struct btrfs_key_ptr))
312 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
313 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
314 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
315 sizeof(struct btrfs_item) - \
316 sizeof(struct btrfs_file_extent_item))
317 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
318 sizeof(struct btrfs_item) -\
319 sizeof(struct btrfs_dir_item))
323 * this is a very generous portion of the super block, giving us
324 * room to translate 14 chunks with 3 stripes each.
326 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
327 #define BTRFS_LABEL_SIZE 256
330 * just in case we somehow lose the roots and are not able to mount,
331 * we store an array of the roots from previous transactions
334 #define BTRFS_NUM_BACKUP_ROOTS 4
335 struct btrfs_root_backup
{
337 __le64 tree_root_gen
;
340 __le64 chunk_root_gen
;
343 __le64 extent_root_gen
;
352 __le64 csum_root_gen
;
362 u8 extent_root_level
;
366 /* future and to align */
368 } __attribute__ ((__packed__
));
371 * the super block basically lists the main trees of the FS
372 * it currently lacks any block count etc etc
374 struct btrfs_super_block
{
375 u8 csum
[BTRFS_CSUM_SIZE
];
376 /* the first 3 fields must match struct btrfs_header */
377 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
378 __le64 bytenr
; /* this block number */
381 /* allowed to be different from the btrfs_header from here own down */
388 /* this will help find the new super based on the log root */
389 __le64 log_root_transid
;
392 __le64 root_dir_objectid
;
398 __le32 sys_chunk_array_size
;
399 __le64 chunk_root_generation
;
401 __le64 compat_ro_flags
;
402 __le64 incompat_flags
;
407 struct btrfs_dev_item dev_item
;
409 char label
[BTRFS_LABEL_SIZE
];
411 __le64 cache_generation
;
413 /* future expansion */
415 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
416 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
417 } __attribute__ ((__packed__
));
420 * Compat flags that we support. If any incompat flags are set other than the
421 * ones specified below then we will fail to mount
423 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
424 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
425 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
426 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
428 * some patches floated around with a second compression method
429 * lets save that incompat here for when they do get in
430 * Note we don't actually support it, we're just reserving the
433 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
436 * older kernels tried to do bigger metadata blocks, but the
437 * code was pretty buggy. Lets not let them try anymore.
439 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
442 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
443 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
444 #define BTRFS_FEATURE_INCOMPAT_SUPP \
445 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
446 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
447 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
448 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
449 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
452 * A leaf is full of items. offset and size tell us where to find
453 * the item in the leaf (relative to the start of the data area)
456 struct btrfs_disk_key key
;
459 } __attribute__ ((__packed__
));
462 * leaves have an item area and a data area:
463 * [item0, item1....itemN] [free space] [dataN...data1, data0]
465 * The data is separate from the items to get the keys closer together
469 struct btrfs_header header
;
470 struct btrfs_item items
[];
471 } __attribute__ ((__packed__
));
474 * all non-leaf blocks are nodes, they hold only keys and pointers to
477 struct btrfs_key_ptr
{
478 struct btrfs_disk_key key
;
481 } __attribute__ ((__packed__
));
484 struct btrfs_header header
;
485 struct btrfs_key_ptr ptrs
[];
486 } __attribute__ ((__packed__
));
489 * btrfs_paths remember the path taken from the root down to the leaf.
490 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
491 * to any other levels that are present.
493 * The slots array records the index of the item or block pointer
494 * used while walking the tree.
498 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
499 int slots
[BTRFS_MAX_LEVEL
];
500 /* if there is real range locking, this locks field will change */
501 int locks
[BTRFS_MAX_LEVEL
];
503 /* keep some upper locks as we walk down */
507 * set by btrfs_split_item, tells search_slot to keep all locks
508 * and to force calls to keep space in the nodes
510 unsigned int search_for_split
:1;
511 unsigned int keep_locks
:1;
512 unsigned int skip_locking
:1;
513 unsigned int leave_spinning
:1;
517 * items in the extent btree are used to record the objectid of the
518 * owner of the block and the number of references
521 struct btrfs_extent_item
{
525 } __attribute__ ((__packed__
));
527 struct btrfs_extent_item_v0
{
529 } __attribute__ ((__packed__
));
531 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
532 sizeof(struct btrfs_item))
534 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
535 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
537 /* following flags only apply to tree blocks */
539 /* use full backrefs for extent pointers in the block*/
540 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
542 struct btrfs_tree_block_info
{
543 struct btrfs_disk_key key
;
545 } __attribute__ ((__packed__
));
547 struct btrfs_extent_data_ref
{
552 } __attribute__ ((__packed__
));
554 struct btrfs_shared_data_ref
{
556 } __attribute__ ((__packed__
));
558 struct btrfs_extent_inline_ref
{
561 } __attribute__ ((__packed__
));
563 struct btrfs_extent_ref_v0
{
568 } __attribute__ ((__packed__
));
570 /* dev extents record free space on individual devices. The owner
571 * field points back to the chunk allocation mapping tree that allocated
572 * the extent. The chunk tree uuid field is a way to double check the owner
574 struct btrfs_dev_extent
{
576 __le64 chunk_objectid
;
579 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
580 } __attribute__ ((__packed__
));
582 struct btrfs_inode_ref
{
586 } __attribute__ ((__packed__
));
588 struct btrfs_timespec
{
591 } __attribute__ ((__packed__
));
594 BTRFS_COMPRESS_NONE
= 0,
595 BTRFS_COMPRESS_ZLIB
= 1,
596 BTRFS_COMPRESS_LZO
= 2,
597 BTRFS_COMPRESS_TYPES
= 2,
598 BTRFS_COMPRESS_LAST
= 3,
599 } btrfs_compression_type
;
601 /* we don't understand any encryption methods right now */
603 BTRFS_ENCRYPTION_NONE
= 0,
604 BTRFS_ENCRYPTION_LAST
= 1,
605 } btrfs_encryption_type
;
607 struct btrfs_inode_item
{
608 /* nfs style generation number */
610 /* transid that last touched this inode */
622 /* modification sequence number for NFS */
626 * a little future expansion, for more than this we can
627 * just grow the inode item and version it
630 struct btrfs_timespec atime
;
631 struct btrfs_timespec ctime
;
632 struct btrfs_timespec mtime
;
633 struct btrfs_timespec otime
;
634 } __attribute__ ((__packed__
));
636 struct btrfs_dir_log_item
{
638 } __attribute__ ((__packed__
));
640 struct btrfs_dir_item
{
641 struct btrfs_disk_key location
;
646 } __attribute__ ((__packed__
));
648 struct btrfs_root_item_v0
{
649 struct btrfs_inode_item inode
;
655 __le64 last_snapshot
;
658 struct btrfs_disk_key drop_progress
;
661 } __attribute__ ((__packed__
));
663 struct btrfs_root_item
{
664 struct btrfs_inode_item inode
;
670 __le64 last_snapshot
;
673 struct btrfs_disk_key drop_progress
;
678 * The following fields appear after subvol_uuids+subvol_times
683 * This generation number is used to test if the new fields are valid
684 * and up to date while reading the root item. Everytime the root item
685 * is written out, the "generation" field is copied into this field. If
686 * anyone ever mounted the fs with an older kernel, we will have
687 * mismatching generation values here and thus must invalidate the
688 * new fields. See btrfs_update_root and btrfs_find_last_root for
690 * the offset of generation_v2 is also used as the start for the memset
691 * when invalidating the fields.
693 __le64 generation_v2
;
694 u8 uuid
[BTRFS_UUID_SIZE
];
695 u8 parent_uuid
[BTRFS_UUID_SIZE
];
696 u8 received_uuid
[BTRFS_UUID_SIZE
];
697 __le64 ctransid
; /* updated when an inode changes */
698 __le64 otransid
; /* trans when created */
699 __le64 stransid
; /* trans when sent. non-zero for received subvol */
700 __le64 rtransid
; /* trans when received. non-zero for received subvol */
701 struct btrfs_timespec ctime
;
702 struct btrfs_timespec otime
;
703 struct btrfs_timespec stime
;
704 struct btrfs_timespec rtime
;
705 __le64 reserved
[8]; /* for future */
706 } __attribute__ ((__packed__
));
709 * this is used for both forward and backward root refs
711 struct btrfs_root_ref
{
715 } __attribute__ ((__packed__
));
717 #define BTRFS_FILE_EXTENT_INLINE 0
718 #define BTRFS_FILE_EXTENT_REG 1
719 #define BTRFS_FILE_EXTENT_PREALLOC 2
721 struct btrfs_file_extent_item
{
723 * transaction id that created this extent
727 * max number of bytes to hold this extent in ram
728 * when we split a compressed extent we can't know how big
729 * each of the resulting pieces will be. So, this is
730 * an upper limit on the size of the extent in ram instead of
736 * 32 bits for the various ways we might encode the data,
737 * including compression and encryption. If any of these
738 * are set to something a given disk format doesn't understand
739 * it is treated like an incompat flag for reading and writing,
744 __le16 other_encoding
; /* spare for later use */
746 /* are we inline data or a real extent? */
750 * disk space consumed by the extent, checksum blocks are included
754 __le64 disk_num_bytes
;
756 * the logical offset in file blocks (no csums)
757 * this extent record is for. This allows a file extent to point
758 * into the middle of an existing extent on disk, sharing it
759 * between two snapshots (useful if some bytes in the middle of the
760 * extent have changed
764 * the logical number of file blocks (no csums included)
768 } __attribute__ ((__packed__
));
770 struct btrfs_csum_item
{
772 } __attribute__ ((__packed__
));
774 /* tag for the radix tree of block groups in ram */
775 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
776 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
777 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
778 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
779 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
780 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
781 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
782 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
784 /* used in struct btrfs_balance_args fields */
785 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
787 #define BTRFS_QGROUP_STATUS_OFF 0
788 #define BTRFS_QGROUP_STATUS_ON 1
789 #define BTRFS_QGROUP_STATUS_SCANNING 2
791 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1 << 0)
793 struct btrfs_qgroup_status_item
{
797 __le64 scan
; /* progress during scanning */
798 } __attribute__ ((__packed__
));
800 struct btrfs_block_group_item
{
802 __le64 chunk_objectid
;
804 } __attribute__ ((__packed__
));
806 struct btrfs_qgroup_info_item
{
809 __le64 referenced_compressed
;
811 __le64 exclusive_compressed
;
812 } __attribute__ ((__packed__
));
814 /* flags definition for qgroup limits */
815 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
816 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
817 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
818 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
819 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
820 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
822 struct btrfs_qgroup_limit_item
{
824 __le64 max_referenced
;
825 __le64 max_exclusive
;
826 __le64 rsv_referenced
;
827 __le64 rsv_exclusive
;
828 } __attribute__ ((__packed__
));
830 struct btrfs_space_info
{
836 struct list_head list
;
839 struct btrfs_block_group_cache
{
840 struct cache_extent cache
;
841 struct btrfs_key key
;
842 struct btrfs_block_group_item item
;
843 struct btrfs_space_info
*space_info
;
850 struct btrfs_extent_ops
{
851 int (*alloc_extent
)(struct btrfs_root
*root
, u64 num_bytes
,
852 u64 hint_byte
, struct btrfs_key
*ins
);
853 int (*free_extent
)(struct btrfs_root
*root
, u64 bytenr
,
858 struct btrfs_fs_devices
;
859 struct btrfs_fs_info
{
860 u8 fsid
[BTRFS_FSID_SIZE
];
861 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
862 struct btrfs_root
*fs_root
;
863 struct btrfs_root
*extent_root
;
864 struct btrfs_root
*tree_root
;
865 struct btrfs_root
*chunk_root
;
866 struct btrfs_root
*dev_root
;
867 struct btrfs_root
*csum_root
;
869 struct cache_tree fs_root_cache
;
871 /* the log root tree is a directory of all the other log roots */
872 struct btrfs_root
*log_root_tree
;
874 struct extent_io_tree extent_cache
;
875 struct extent_io_tree free_space_cache
;
876 struct extent_io_tree block_group_cache
;
877 struct extent_io_tree pinned_extents
;
878 struct extent_io_tree pending_del
;
879 struct extent_io_tree extent_ins
;
881 /* logical->physical extent mapping */
882 struct btrfs_mapping_tree mapping_tree
;
885 u64 last_trans_committed
;
887 u64 avail_data_alloc_bits
;
888 u64 avail_metadata_alloc_bits
;
889 u64 avail_system_alloc_bits
;
890 u64 data_alloc_profile
;
891 u64 metadata_alloc_profile
;
892 u64 system_alloc_profile
;
895 struct btrfs_trans_handle
*running_transaction
;
896 struct btrfs_super_block super_copy
;
897 struct mutex fs_mutex
;
902 struct btrfs_extent_ops
*extent_ops
;
903 struct list_head dirty_cowonly_roots
;
905 struct btrfs_fs_devices
*fs_devices
;
906 struct list_head space_info
;
909 int (*free_extent_hook
)(struct btrfs_trans_handle
*trans
,
910 struct btrfs_root
*root
,
911 u64 bytenr
, u64 num_bytes
, u64 parent
,
912 u64 root_objectid
, u64 owner
, u64 offset
,
914 struct cache_tree
*fsck_extent_cache
;
915 struct cache_tree
*corrupt_blocks
;
919 * in ram representation of the tree. extent_root is used for all allocations
920 * and for the extent tree extent_root root.
923 struct extent_buffer
*node
;
924 struct extent_buffer
*commit_root
;
925 struct btrfs_root_item root_item
;
926 struct btrfs_key root_key
;
927 struct btrfs_fs_info
*fs_info
;
931 /* data allocations are done in sectorsize units */
934 /* node allocations are done in nodesize units */
937 /* leaf allocations are done in leafsize units */
940 /* leaf allocations are done in leafsize units */
949 u64 last_inode_alloc
;
951 /* the dirty list is only used by non-reference counted roots */
952 struct list_head dirty_list
;
953 struct cache_extent cache
;
957 * inode items have the data typically returned from stat and store other
958 * info about object characteristics. There is one for every file and dir in
961 #define BTRFS_INODE_ITEM_KEY 1
962 #define BTRFS_INODE_REF_KEY 12
963 #define BTRFS_XATTR_ITEM_KEY 24
964 #define BTRFS_ORPHAN_ITEM_KEY 48
966 #define BTRFS_DIR_LOG_ITEM_KEY 60
967 #define BTRFS_DIR_LOG_INDEX_KEY 72
969 * dir items are the name -> inode pointers in a directory. There is one
970 * for every name in a directory.
972 #define BTRFS_DIR_ITEM_KEY 84
973 #define BTRFS_DIR_INDEX_KEY 96
976 * extent data is for file data
978 #define BTRFS_EXTENT_DATA_KEY 108
981 * csum items have the checksums for data in the extents
983 #define BTRFS_CSUM_ITEM_KEY 120
985 * extent csums are stored in a separate tree and hold csums for
986 * an entire extent on disk.
988 #define BTRFS_EXTENT_CSUM_KEY 128
991 * root items point to tree roots. There are typically in the root
992 * tree used by the super block to find all the other trees
994 #define BTRFS_ROOT_ITEM_KEY 132
997 * root backrefs tie subvols and snapshots to the directory entries that
1000 #define BTRFS_ROOT_BACKREF_KEY 144
1003 * root refs make a fast index for listing all of the snapshots and
1004 * subvolumes referenced by a given root. They point directly to the
1005 * directory item in the root that references the subvol
1007 #define BTRFS_ROOT_REF_KEY 156
1010 * extent items are in the extent map tree. These record which blocks
1011 * are used, and how many references there are to each block
1013 #define BTRFS_EXTENT_ITEM_KEY 168
1015 #define BTRFS_TREE_BLOCK_REF_KEY 176
1017 #define BTRFS_EXTENT_DATA_REF_KEY 178
1019 /* old style extent backrefs */
1020 #define BTRFS_EXTENT_REF_V0_KEY 180
1022 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1024 #define BTRFS_SHARED_DATA_REF_KEY 184
1028 * block groups give us hints into the extent allocation trees. Which
1029 * blocks are free etc etc
1031 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1033 #define BTRFS_DEV_EXTENT_KEY 204
1034 #define BTRFS_DEV_ITEM_KEY 216
1035 #define BTRFS_CHUNK_ITEM_KEY 228
1037 #define BTRFS_BALANCE_ITEM_KEY 248
1042 #define BTRFS_QGROUP_STATUS_KEY 240
1043 #define BTRFS_QGROUP_INFO_KEY 242
1044 #define BTRFS_QGROUP_LIMIT_KEY 244
1045 #define BTRFS_QGROUP_RELATION_KEY 246
1048 * string items are for debugging. They just store a short string of
1051 #define BTRFS_STRING_ITEM_KEY 253
1055 #define BTRFS_INODE_NODATASUM (1 << 0)
1056 #define BTRFS_INODE_NODATACOW (1 << 1)
1057 #define BTRFS_INODE_READONLY (1 << 2)
1059 #define read_eb_member(eb, ptr, type, member, result) ( \
1060 read_extent_buffer(eb, (char *)(result), \
1061 ((unsigned long)(ptr)) + \
1062 offsetof(type, member), \
1063 sizeof(((type *)0)->member)))
1065 #define write_eb_member(eb, ptr, type, member, result) ( \
1066 write_extent_buffer(eb, (char *)(result), \
1067 ((unsigned long)(ptr)) + \
1068 offsetof(type, member), \
1069 sizeof(((type *)0)->member)))
1071 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1072 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1074 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1075 return le##bits##_to_cpu(h->member); \
1077 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1080 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1081 h->member = cpu_to_le##bits(val); \
1084 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1085 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
1088 unsigned long offset = (unsigned long)s; \
1089 type *p = (type *) (eb->data + offset); \
1090 return le##bits##_to_cpu(p->member); \
1092 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1093 type *s, u##bits val) \
1095 unsigned long offset = (unsigned long)s; \
1096 type *p = (type *) (eb->data + offset); \
1097 p->member = cpu_to_le##bits(val); \
1100 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1101 static inline u##bits btrfs_##name(type *s) \
1103 return le##bits##_to_cpu(s->member); \
1105 static inline void btrfs_set_##name(type *s, u##bits val) \
1107 s->member = cpu_to_le##bits(val); \
1110 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1111 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1112 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1113 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1114 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1115 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1117 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1118 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1119 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1120 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1121 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1122 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1124 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1125 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1127 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1129 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1131 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1133 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1135 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1136 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1138 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1140 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1142 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1145 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1147 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1150 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1152 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1155 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1156 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1157 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1158 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1159 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1160 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1161 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1162 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1163 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1164 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1165 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1167 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1169 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1172 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1173 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1174 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1176 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1178 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1180 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1182 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1183 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1185 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1187 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1188 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1190 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1193 unsigned long offset
= (unsigned long)c
;
1194 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1195 offset
+= nr
* sizeof(struct btrfs_stripe
);
1196 return (struct btrfs_stripe
*)offset
;
1199 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1201 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1204 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1205 struct btrfs_chunk
*c
, int nr
)
1207 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1210 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1211 struct btrfs_chunk
*c
, int nr
,
1214 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1217 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1218 struct btrfs_chunk
*c
, int nr
)
1220 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1223 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1224 struct btrfs_chunk
*c
, int nr
,
1227 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1230 /* struct btrfs_block_group_item */
1231 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1233 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1235 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1236 struct btrfs_block_group_item
, chunk_objectid
, 64);
1238 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1239 struct btrfs_block_group_item
, chunk_objectid
, 64);
1240 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1241 struct btrfs_block_group_item
, flags
, 64);
1242 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1243 struct btrfs_block_group_item
, flags
, 64);
1245 /* struct btrfs_inode_ref */
1246 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1247 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1248 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1250 /* struct btrfs_inode_item */
1251 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1252 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1253 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1254 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1255 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1256 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1257 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1258 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1259 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1260 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1261 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1262 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1264 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
1265 struct btrfs_inode_item
, generation
, 64);
1266 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
,
1267 struct btrfs_inode_item
, generation
, 64);
1268 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
1269 struct btrfs_inode_item
, size
, 64);
1270 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
,
1271 struct btrfs_inode_item
, nbytes
, 64);
1272 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
1273 struct btrfs_inode_item
, block_group
, 64);
1274 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
1275 struct btrfs_inode_item
, nlink
, 32);
1276 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
1277 struct btrfs_inode_item
, uid
, 32);
1278 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
1279 struct btrfs_inode_item
, gid
, 32);
1280 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
1281 struct btrfs_inode_item
, mode
, 32);
1282 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
1283 struct btrfs_inode_item
, rdev
, 64);
1284 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
1285 struct btrfs_inode_item
, flags
, 64);
1287 static inline struct btrfs_timespec
*
1288 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1290 unsigned long ptr
= (unsigned long)inode_item
;
1291 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1292 return (struct btrfs_timespec
*)ptr
;
1295 static inline struct btrfs_timespec
*
1296 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1298 unsigned long ptr
= (unsigned long)inode_item
;
1299 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1300 return (struct btrfs_timespec
*)ptr
;
1303 static inline struct btrfs_timespec
*
1304 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1306 unsigned long ptr
= (unsigned long)inode_item
;
1307 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1308 return (struct btrfs_timespec
*)ptr
;
1311 static inline struct btrfs_timespec
*
1312 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1314 unsigned long ptr
= (unsigned long)inode_item
;
1315 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1316 return (struct btrfs_timespec
*)ptr
;
1319 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1320 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1321 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
1323 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
1326 /* struct btrfs_dev_extent */
1327 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1329 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1330 chunk_objectid
, 64);
1331 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1333 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1335 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1337 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1338 return (u8
*)((unsigned long)dev
+ ptr
);
1342 /* struct btrfs_extent_item */
1343 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1344 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1346 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1348 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1350 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1352 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1353 struct btrfs_tree_block_info
*item
,
1354 struct btrfs_disk_key
*key
)
1356 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1359 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1360 struct btrfs_tree_block_info
*item
,
1361 struct btrfs_disk_key
*key
)
1363 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1366 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1368 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1370 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1372 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1375 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1378 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1380 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1383 static inline u32
btrfs_extent_inline_ref_size(int type
)
1385 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1386 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1387 return sizeof(struct btrfs_extent_inline_ref
);
1388 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1389 return sizeof(struct btrfs_shared_data_ref
) +
1390 sizeof(struct btrfs_extent_inline_ref
);
1391 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1392 return sizeof(struct btrfs_extent_data_ref
) +
1393 offsetof(struct btrfs_extent_inline_ref
, offset
);
1398 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1399 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1401 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1402 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1404 /* struct btrfs_node */
1405 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1406 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1408 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1411 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1412 sizeof(struct btrfs_key_ptr
) * nr
;
1413 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1416 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1420 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1421 sizeof(struct btrfs_key_ptr
) * nr
;
1422 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1425 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1428 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1429 sizeof(struct btrfs_key_ptr
) * nr
;
1430 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1433 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1437 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1438 sizeof(struct btrfs_key_ptr
) * nr
;
1439 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1442 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1444 return offsetof(struct btrfs_node
, ptrs
) +
1445 sizeof(struct btrfs_key_ptr
) * nr
;
1448 static inline void btrfs_node_key(struct extent_buffer
*eb
,
1449 struct btrfs_disk_key
*disk_key
, int nr
)
1452 ptr
= btrfs_node_key_ptr_offset(nr
);
1453 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1454 struct btrfs_key_ptr
, key
, disk_key
);
1457 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1458 struct btrfs_disk_key
*disk_key
, int nr
)
1461 ptr
= btrfs_node_key_ptr_offset(nr
);
1462 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1463 struct btrfs_key_ptr
, key
, disk_key
);
1466 /* struct btrfs_item */
1467 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1468 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1470 static inline unsigned long btrfs_item_nr_offset(int nr
)
1472 return offsetof(struct btrfs_leaf
, items
) +
1473 sizeof(struct btrfs_item
) * nr
;
1476 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1479 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1482 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1483 struct btrfs_item
*item
)
1485 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1488 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1490 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1493 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1495 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1498 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1500 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1503 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1504 struct btrfs_disk_key
*disk_key
, int nr
)
1506 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1507 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1510 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1511 struct btrfs_disk_key
*disk_key
, int nr
)
1513 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1514 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1517 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1520 * struct btrfs_root_ref
1522 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1523 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1524 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1526 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1527 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1528 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1530 /* struct btrfs_dir_item */
1531 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1532 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1533 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1534 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1536 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1538 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1539 struct btrfs_dir_item
*item
,
1540 struct btrfs_disk_key
*key
)
1542 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1545 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1546 struct btrfs_dir_item
*item
,
1547 struct btrfs_disk_key
*key
)
1549 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1552 /* struct btrfs_free_space_header */
1553 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1555 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1557 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1560 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1561 struct btrfs_free_space_header
*h
,
1562 struct btrfs_disk_key
*key
)
1564 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1567 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1568 struct btrfs_free_space_header
*h
,
1569 struct btrfs_disk_key
*key
)
1571 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1574 /* struct btrfs_disk_key */
1575 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1577 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1578 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1580 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1581 struct btrfs_disk_key
*disk
)
1583 cpu
->offset
= le64_to_cpu(disk
->offset
);
1584 cpu
->type
= disk
->type
;
1585 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1588 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1589 struct btrfs_key
*cpu
)
1591 disk
->offset
= cpu_to_le64(cpu
->offset
);
1592 disk
->type
= cpu
->type
;
1593 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1596 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1597 struct btrfs_key
*key
, int nr
)
1599 struct btrfs_disk_key disk_key
;
1600 btrfs_node_key(eb
, &disk_key
, nr
);
1601 btrfs_disk_key_to_cpu(key
, &disk_key
);
1604 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1605 struct btrfs_key
*key
, int nr
)
1607 struct btrfs_disk_key disk_key
;
1608 btrfs_item_key(eb
, &disk_key
, nr
);
1609 btrfs_disk_key_to_cpu(key
, &disk_key
);
1612 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1613 struct btrfs_dir_item
*item
,
1614 struct btrfs_key
*key
)
1616 struct btrfs_disk_key disk_key
;
1617 btrfs_dir_item_key(eb
, item
, &disk_key
);
1618 btrfs_disk_key_to_cpu(key
, &disk_key
);
1622 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1627 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1632 /* struct btrfs_header */
1633 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1634 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1636 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1637 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1638 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1639 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1641 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1643 return (btrfs_header_flags(eb
) & flag
) == flag
;
1646 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1648 u64 flags
= btrfs_header_flags(eb
);
1649 btrfs_set_header_flags(eb
, flags
| flag
);
1650 return (flags
& flag
) == flag
;
1653 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1655 u64 flags
= btrfs_header_flags(eb
);
1656 btrfs_set_header_flags(eb
, flags
& ~flag
);
1657 return (flags
& flag
) == flag
;
1660 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1662 u64 flags
= btrfs_header_flags(eb
);
1663 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1666 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1669 u64 flags
= btrfs_header_flags(eb
);
1670 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1671 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1672 btrfs_set_header_flags(eb
, flags
);
1675 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1677 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1681 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1683 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1687 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1689 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1693 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1695 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1699 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1704 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1709 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1714 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1716 return (btrfs_header_level(eb
) == 0);
1719 /* struct btrfs_root_item */
1720 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1722 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1723 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1724 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1726 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1728 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1729 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1730 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1731 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1732 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1733 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1734 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1735 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1737 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
1739 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
1741 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
1743 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
1745 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
1748 /* struct btrfs_root_backup */
1749 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
1751 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
1753 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
1754 tree_root_level
, 8);
1756 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
1758 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
1759 chunk_root_gen
, 64);
1760 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
1761 chunk_root_level
, 8);
1763 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
1765 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
1766 extent_root_gen
, 64);
1767 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
1768 extent_root_level
, 8);
1770 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
1772 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
1774 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
1777 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
1779 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
1781 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
1784 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
1786 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
1788 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
1789 csum_root_level
, 8);
1790 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
1792 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
1794 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
1797 /* struct btrfs_super_block */
1799 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1800 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1801 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1803 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1804 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1805 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1806 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1807 struct btrfs_super_block
, chunk_root_generation
, 64);
1808 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1810 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1812 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1813 chunk_root_level
, 8);
1814 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1816 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1817 log_root_transid
, 64);
1818 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1820 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1822 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1824 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1826 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1828 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1830 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1832 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1833 root_dir_objectid
, 64);
1834 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1836 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1838 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1840 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1841 incompat_flags
, 64);
1842 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1844 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
1845 cache_generation
, 64);
1847 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1849 int t
= btrfs_super_csum_type(s
);
1850 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1851 return btrfs_csum_sizes
[t
];
1854 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1856 return offsetof(struct btrfs_leaf
, items
);
1859 /* struct btrfs_file_extent_item */
1860 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1861 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1863 static inline unsigned long btrfs_file_extent_inline_start(struct
1864 btrfs_file_extent_item
*e
)
1866 unsigned long offset
= (unsigned long)e
;
1867 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1871 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1873 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1876 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1878 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1880 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1882 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
, struct btrfs_file_extent_item
,
1884 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1885 disk_num_bytes
, 64);
1886 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1888 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
, struct btrfs_file_extent_item
,
1890 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1892 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
, struct btrfs_file_extent_item
,
1894 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1896 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1898 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1900 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
, struct btrfs_file_extent_item
,
1902 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1904 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1905 other_encoding
, 16);
1907 /* btrfs_qgroup_status_item */
1908 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
1910 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
1912 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
1914 BTRFS_SETGET_FUNCS(qgroup_status_scan
, struct btrfs_qgroup_status_item
,
1917 /* btrfs_qgroup_info_item */
1918 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
1920 BTRFS_SETGET_FUNCS(qgroup_info_referenced
, struct btrfs_qgroup_info_item
,
1922 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed
,
1923 struct btrfs_qgroup_info_item
, referenced_compressed
, 64);
1924 BTRFS_SETGET_FUNCS(qgroup_info_exclusive
, struct btrfs_qgroup_info_item
,
1926 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed
,
1927 struct btrfs_qgroup_info_item
, exclusive_compressed
, 64);
1929 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
1930 struct btrfs_qgroup_info_item
, generation
, 64);
1931 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced
,
1932 struct btrfs_qgroup_info_item
, referenced
, 64);
1933 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed
,
1934 struct btrfs_qgroup_info_item
, referenced_compressed
, 64);
1935 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive
,
1936 struct btrfs_qgroup_info_item
, exclusive
, 64);
1937 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed
,
1938 struct btrfs_qgroup_info_item
, exclusive_compressed
, 64);
1940 /* btrfs_qgroup_limit_item */
1941 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
1943 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced
, struct btrfs_qgroup_limit_item
,
1944 max_referenced
, 64);
1945 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive
, struct btrfs_qgroup_limit_item
,
1947 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced
, struct btrfs_qgroup_limit_item
,
1948 rsv_referenced
, 64);
1949 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive
, struct btrfs_qgroup_limit_item
,
1952 /* this returns the number of file bytes represented by the inline item.
1953 * If an item is compressed, this is the uncompressed size
1955 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1956 struct btrfs_file_extent_item
*e
)
1958 return btrfs_file_extent_ram_bytes(eb
, e
);
1962 * this returns the number of bytes used by the item on disk, minus the
1963 * size of any extent headers. If a file is compressed on disk, this is
1964 * the compressed size
1966 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1967 struct btrfs_item
*e
)
1969 unsigned long offset
;
1970 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1971 return btrfs_item_size(eb
, e
) - offset
;
1974 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1976 return root
->leafsize
;
1977 return root
->nodesize
;
1980 /* helper function to cast into the data area of the leaf. */
1981 #define btrfs_item_ptr(leaf, slot, type) \
1982 ((type *)(btrfs_leaf_data(leaf) + \
1983 btrfs_item_offset_nr(leaf, slot)))
1985 #define btrfs_item_ptr_offset(leaf, slot) \
1986 ((unsigned long)(btrfs_leaf_data(leaf) + \
1987 btrfs_item_offset_nr(leaf, slot)))
1990 int btrfs_fix_block_accounting(struct btrfs_trans_handle
*trans
,
1991 struct btrfs_root
*root
);
1992 int btrfs_check_block_accounting(struct btrfs_root
*root
);
1993 void btrfs_pin_extent(struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 num_bytes
);
1994 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1995 struct btrfs_root
*root
);
1996 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1997 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1998 btrfs_fs_info
*info
,
2000 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
2001 struct btrfs_block_group_cache
2002 *hint
, u64 search_start
,
2003 int data
, int owner
);
2004 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2005 struct btrfs_root
*root
,
2006 u32 blocksize
, u64 root_objectid
,
2007 struct btrfs_disk_key
*key
, int level
,
2008 u64 hint
, u64 empty_size
);
2009 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
2010 struct btrfs_root
*root
,
2011 u64 num_bytes
, u64 parent
,
2012 u64 root_objectid
, u64 ref_generation
,
2013 u64 owner
, u64 empty_size
, u64 hint_byte
,
2014 u64 search_end
, struct btrfs_key
*ins
, int data
);
2015 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2016 struct btrfs_root
*root
, u64 bytenr
,
2017 u64 num_bytes
, u64
*refs
, u64
*flags
);
2018 int btrfs_set_block_flags(struct btrfs_trans_handle
*trans
,
2019 struct btrfs_root
*root
,
2020 u64 bytenr
, u64 num_bytes
, u64 flags
);
2021 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2022 struct extent_buffer
*buf
, int record_parent
);
2023 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2024 struct extent_buffer
*buf
, int record_parent
);
2025 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2026 struct btrfs_root
*root
,
2027 u64 bytenr
, u64 num_bytes
, u64 parent
,
2028 u64 root_objectid
, u64 owner
, u64 offset
);
2029 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2030 struct btrfs_root
*root
,
2031 struct extent_io_tree
*unpin
);
2032 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2033 struct btrfs_root
*root
,
2034 u64 bytenr
, u64 num_bytes
, u64 parent
,
2035 u64 root_objectid
, u64 ref_generation
,
2036 u64 owner_objectid
);
2037 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
2038 struct btrfs_root
*root
, u64 bytenr
,
2039 u64 orig_parent
, u64 parent
,
2040 u64 root_objectid
, u64 ref_generation
,
2041 u64 owner_objectid
);
2042 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2043 struct btrfs_root
*root
);
2044 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2045 int btrfs_read_block_groups(struct btrfs_root
*root
);
2046 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2047 struct btrfs_root
*root
, u64 bytes_used
,
2048 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2050 int btrfs_make_block_groups(struct btrfs_trans_handle
*trans
,
2051 struct btrfs_root
*root
);
2052 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
2053 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
2054 int alloc
, int mark_free
);
2056 int btrfs_del_ptr(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2057 struct btrfs_path
*path
, int level
, int slot
);
2058 int btrfs_check_node(struct btrfs_root
*root
,
2059 struct btrfs_disk_key
*parent_key
,
2060 struct extent_buffer
*buf
);
2061 int btrfs_check_leaf(struct btrfs_root
*root
,
2062 struct btrfs_disk_key
*parent_key
,
2063 struct extent_buffer
*buf
);
2064 int btrfs_fsck_reinit_root(struct btrfs_trans_handle
*trans
,
2065 struct btrfs_root
*root
);
2066 void reada_for_search(struct btrfs_root
*root
, struct btrfs_path
*path
,
2067 int level
, int slot
, u64 objectid
);
2068 struct extent_buffer
*read_node_slot(struct btrfs_root
*root
,
2069 struct extent_buffer
*parent
, int slot
);
2070 int btrfs_previous_item(struct btrfs_root
*root
,
2071 struct btrfs_path
*path
, u64 min_objectid
,
2073 int btrfs_comp_keys(struct btrfs_disk_key
*disk
, struct btrfs_key
*k2
);
2074 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2075 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2076 struct extent_buffer
*parent
, int parent_slot
,
2077 struct extent_buffer
**cow_ret
);
2078 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2079 struct btrfs_root
*root
,
2080 struct extent_buffer
*buf
,
2081 struct extent_buffer
*parent
, int parent_slot
,
2082 struct extent_buffer
**cow_ret
,
2083 u64 search_start
, u64 empty_size
);
2084 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2085 struct btrfs_root
*root
,
2086 struct extent_buffer
*buf
,
2087 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2088 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2089 *root
, struct btrfs_path
*path
, u32 data_size
);
2090 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2091 struct btrfs_root
*root
,
2092 struct btrfs_path
*path
,
2093 u32 new_size
, int from_end
);
2094 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2095 struct btrfs_root
*root
,
2096 struct btrfs_path
*path
,
2097 struct btrfs_key
*new_key
,
2098 unsigned long split_offset
);
2099 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2100 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2102 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2103 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2104 int start_slot
, int cache_only
, u64
*last_ret
,
2105 struct btrfs_key
*progress
);
2106 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
2107 struct btrfs_path
*btrfs_alloc_path(void);
2108 void btrfs_free_path(struct btrfs_path
*p
);
2109 void btrfs_init_path(struct btrfs_path
*p
);
2110 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2111 struct btrfs_path
*path
, int slot
, int nr
);
2113 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2114 struct btrfs_root
*root
,
2115 struct btrfs_path
*path
)
2117 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2120 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2121 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2122 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2123 struct btrfs_root
*root
,
2124 struct btrfs_path
*path
,
2125 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2127 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2128 struct btrfs_root
*root
,
2129 struct btrfs_path
*path
,
2130 struct btrfs_key
*key
,
2133 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2136 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2137 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2138 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2139 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2141 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
2142 struct btrfs_root
*root
, struct btrfs_path
*path
,
2143 struct btrfs_key
*new_key
);
2146 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2147 struct btrfs_root
*tree_root
,
2148 u64 root_id
, u8 type
, u64 ref_id
,
2149 u64 dirid
, u64 sequence
,
2150 const char *name
, int name_len
);
2151 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2152 struct btrfs_key
*key
);
2153 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2154 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2156 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2157 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2159 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2160 btrfs_root_item
*item
, struct btrfs_key
*key
);
2161 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
2162 struct btrfs_root
*latest_root
);
2164 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2165 *root
, const char *name
, int name_len
, u64 dir
,
2166 struct btrfs_key
*location
, u8 type
, u64 index
);
2167 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2168 struct btrfs_root
*root
,
2169 struct btrfs_path
*path
, u64 dir
,
2170 const char *name
, int name_len
,
2172 struct btrfs_dir_item
*
2173 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2174 struct btrfs_root
*root
,
2175 struct btrfs_path
*path
, u64 dir
,
2176 u64 objectid
, const char *name
, int name_len
,
2178 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2179 struct btrfs_path
*path
,
2180 const char *name
, int name_len
);
2181 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2182 struct btrfs_root
*root
,
2183 struct btrfs_path
*path
,
2184 struct btrfs_dir_item
*di
);
2185 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2186 struct btrfs_root
*root
, const char *name
,
2187 u16 name_len
, const void *data
, u16 data_len
,
2189 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2190 struct btrfs_root
*root
,
2191 struct btrfs_path
*path
, u64 dir
,
2192 const char *name
, u16 name_len
,
2195 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2196 struct btrfs_root
*fs_root
,
2197 u64 dirid
, u64
*objectid
);
2198 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2201 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2202 struct btrfs_root
*root
,
2203 const char *name
, int name_len
,
2204 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2205 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2206 struct btrfs_root
*root
,
2207 const char *name
, int name_len
,
2208 u64 inode_objectid
, u64 ref_objectid
);
2209 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2210 struct btrfs_root
*root
,
2211 struct btrfs_path
*path
, u64 objectid
);
2212 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2213 *root
, u64 objectid
, struct btrfs_inode_item
2215 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2216 *root
, struct btrfs_path
*path
,
2217 struct btrfs_key
*location
, int mod
);
2220 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2221 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2222 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2223 struct btrfs_root
*root
,
2224 u64 objectid
, u64 pos
, u64 offset
,
2227 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
2228 struct btrfs_root
*root
, u64 objectid
,
2229 u64 offset
, char *buffer
, size_t size
);
2230 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2231 struct btrfs_root
*root
,
2232 struct btrfs_path
*path
, u64 objectid
,
2233 u64 bytenr
, int mod
);
2234 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
2235 struct btrfs_root
*root
, u64 alloc_end
,
2236 u64 bytenr
, char *data
, size_t len
);
2237 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2238 struct btrfs_root
*root
,
2239 struct btrfs_path
*path
,
2240 u64 bytenr
, int cow
);
2241 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2242 struct btrfs_root
*root
, struct btrfs_path
*path
,