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.
19 #ifndef __BTRFS_CTREE_H__
20 #define __BTRFS_CTREE_H__
22 #if BTRFS_FLAT_INCLUDES
24 #include "kerncompat.h"
25 #include "radix-tree.h"
26 #include "extent-cache.h"
27 #include "extent_io.h"
30 #include <btrfs/list.h>
31 #include <btrfs/kerncompat.h>
32 #include <btrfs/radix-tree.h>
33 #include <btrfs/extent-cache.h>
34 #include <btrfs/extent_io.h>
35 #include <btrfs/ioctl.h>
36 #endif /* BTRFS_FLAT_INCLUDES */
39 struct btrfs_trans_handle
;
40 struct btrfs_free_space_ctl
;
41 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
44 * Fake signature for an unfinalized filesystem, structures might be partially
47 #define BTRFS_MAGIC_PARTIAL 0x4D5F536652484221ULL /* ascii !BHRfS_M, no null */
49 #define BTRFS_MAX_MIRRORS 3
51 #define BTRFS_MAX_LEVEL 8
53 #define BTRFS_COMPAT_EXTENT_TREE_V0
55 /* holds pointers to all of the tree roots */
56 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
58 /* stores information about which extents are in use, and reference counts */
59 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
62 * chunk tree stores translations from logical -> physical block numbering
63 * the super block points to the chunk tree
65 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
68 * stores information about which areas of a given device are in use.
69 * one per device. The tree of tree roots points to the device tree
71 #define BTRFS_DEV_TREE_OBJECTID 4ULL
73 /* one per subvolume, storing files and directories */
74 #define BTRFS_FS_TREE_OBJECTID 5ULL
76 /* directory objectid inside the root tree */
77 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
78 /* holds checksums of all the data extents */
79 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
80 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
82 /* for storing items that use the BTRFS_UUID_KEY* */
83 #define BTRFS_UUID_TREE_OBJECTID 9ULL
85 /* tracks free space in block groups. */
86 #define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
88 /* for storing balance parameters in the root tree */
89 #define BTRFS_BALANCE_OBJECTID -4ULL
91 /* oprhan objectid for tracking unlinked/truncated files */
92 #define BTRFS_ORPHAN_OBJECTID -5ULL
94 /* does write ahead logging to speed up fsyncs */
95 #define BTRFS_TREE_LOG_OBJECTID -6ULL
96 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
99 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
100 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
103 * extent checksums all have this objectid
104 * this allows them to share the logging tree
107 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
109 /* For storing free space cache */
110 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
113 * The inode number assigned to the special inode for sotring
116 #define BTRFS_FREE_INO_OBJECTID -12ULL
118 /* dummy objectid represents multiple objectids */
119 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
122 * All files have objectids in this range.
124 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
125 #define BTRFS_LAST_FREE_OBJECTID -256ULL
126 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
131 * the device items go into the chunk tree. The key is in the form
132 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
134 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
137 * the max metadata block size. This limit is somewhat artificial,
138 * but the memmove costs go through the roof for larger blocks.
140 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
143 * we can actually store much bigger names, but lets not confuse the rest
146 #define BTRFS_NAME_LEN 255
149 * Theoretical limit is larger, but we keep this down to a sane
150 * value. That should limit greatly the possibility of collisions on
153 #define BTRFS_LINK_MAX 65535U
155 /* 32 bytes in various csum fields */
156 #define BTRFS_CSUM_SIZE 32
159 #define BTRFS_CSUM_TYPE_CRC32 0
161 static int btrfs_csum_sizes
[] = { 4 };
163 /* four bytes for CRC32 */
164 #define BTRFS_CRC32_SIZE 4
165 #define BTRFS_EMPTY_DIR_SIZE 0
167 #define BTRFS_FT_UNKNOWN 0
168 #define BTRFS_FT_REG_FILE 1
169 #define BTRFS_FT_DIR 2
170 #define BTRFS_FT_CHRDEV 3
171 #define BTRFS_FT_BLKDEV 4
172 #define BTRFS_FT_FIFO 5
173 #define BTRFS_FT_SOCK 6
174 #define BTRFS_FT_SYMLINK 7
175 #define BTRFS_FT_XATTR 8
176 #define BTRFS_FT_MAX 9
178 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
181 * the key defines the order in the tree, and so it also defines (optimal)
182 * block layout. objectid corresponds to the inode number. The flags
183 * tells us things about the object, and is a kind of stream selector.
184 * so for a given inode, keys with flags of 1 might refer to the inode
185 * data, flags of 2 may point to file data in the btree and flags == 3
186 * may point to extents.
188 * offset is the starting byte offset for this key in the stream.
190 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
191 * in cpu native order. Otherwise they are identical and their sizes
192 * should be the same (ie both packed)
194 struct btrfs_disk_key
{
198 } __attribute__ ((__packed__
));
204 } __attribute__ ((__packed__
));
206 struct btrfs_mapping_tree
{
207 struct cache_tree cache_tree
;
210 #define BTRFS_UUID_SIZE 16
211 struct btrfs_dev_item
{
212 /* the internal btrfs device id */
215 /* size of the device */
221 /* optimal io alignment for this device */
224 /* optimal io width for this device */
227 /* minimal io size for this device */
230 /* type and info about this device */
233 /* expected generation for this device */
237 * starting byte of this partition on the device,
238 * to allow for stripe alignment in the future
242 /* grouping information for allocation decisions */
245 /* seek speed 0-100 where 100 is fastest */
248 /* bandwidth 0-100 where 100 is fastest */
251 /* btrfs generated uuid for this device */
252 u8 uuid
[BTRFS_UUID_SIZE
];
254 /* uuid of FS who owns this device */
255 u8 fsid
[BTRFS_UUID_SIZE
];
256 } __attribute__ ((__packed__
));
258 struct btrfs_stripe
{
261 u8 dev_uuid
[BTRFS_UUID_SIZE
];
262 } __attribute__ ((__packed__
));
265 /* size of this chunk in bytes */
268 /* objectid of the root referencing this chunk */
274 /* optimal io alignment for this chunk */
277 /* optimal io width for this chunk */
280 /* minimal io size for this chunk */
283 /* 2^16 stripes is quite a lot, a second limit is the size of a single
288 /* sub stripes only matter for raid10 */
290 struct btrfs_stripe stripe
;
291 /* additional stripes go here */
292 } __attribute__ ((__packed__
));
294 #define BTRFS_FREE_SPACE_EXTENT 1
295 #define BTRFS_FREE_SPACE_BITMAP 2
297 struct btrfs_free_space_entry
{
301 } __attribute__ ((__packed__
));
303 struct btrfs_free_space_header
{
304 struct btrfs_disk_key location
;
308 } __attribute__ ((__packed__
));
310 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
312 BUG_ON(num_stripes
== 0);
313 return sizeof(struct btrfs_chunk
) +
314 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
317 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
318 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
319 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
320 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
321 #define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
322 #define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
324 #define BTRFS_BACKREF_REV_MAX 256
325 #define BTRFS_BACKREF_REV_SHIFT 56
326 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
327 BTRFS_BACKREF_REV_SHIFT)
329 #define BTRFS_OLD_BACKREF_REV 0
330 #define BTRFS_MIXED_BACKREF_REV 1
333 * every tree block (leaf or node) starts with this header.
335 struct btrfs_header
{
336 /* these first four must match the super block */
337 u8 csum
[BTRFS_CSUM_SIZE
];
338 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
339 __le64 bytenr
; /* which block this node is supposed to live in */
342 /* allowed to be different from the super from here on down */
343 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
348 } __attribute__ ((__packed__
));
350 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
351 sizeof(struct btrfs_header)) / \
352 sizeof(struct btrfs_key_ptr))
353 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
354 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
355 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
356 sizeof(struct btrfs_item) - \
357 sizeof(struct btrfs_file_extent_item))
358 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
359 sizeof(struct btrfs_item) -\
360 sizeof(struct btrfs_dir_item))
364 * this is a very generous portion of the super block, giving us
365 * room to translate 14 chunks with 3 stripes each.
367 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
368 #define BTRFS_LABEL_SIZE 256
371 * just in case we somehow lose the roots and are not able to mount,
372 * we store an array of the roots from previous transactions
375 #define BTRFS_NUM_BACKUP_ROOTS 4
376 struct btrfs_root_backup
{
378 __le64 tree_root_gen
;
381 __le64 chunk_root_gen
;
384 __le64 extent_root_gen
;
393 __le64 csum_root_gen
;
403 u8 extent_root_level
;
407 /* future and to align */
409 } __attribute__ ((__packed__
));
412 * the super block basically lists the main trees of the FS
413 * it currently lacks any block count etc etc
415 struct btrfs_super_block
{
416 u8 csum
[BTRFS_CSUM_SIZE
];
417 /* the first 3 fields must match struct btrfs_header */
418 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
419 __le64 bytenr
; /* this block number */
422 /* allowed to be different from the btrfs_header from here own down */
429 /* this will help find the new super based on the log root */
430 __le64 log_root_transid
;
433 __le64 root_dir_objectid
;
437 /* Unused and must be equal to nodesize */
440 __le32 sys_chunk_array_size
;
441 __le64 chunk_root_generation
;
443 __le64 compat_ro_flags
;
444 __le64 incompat_flags
;
449 struct btrfs_dev_item dev_item
;
451 char label
[BTRFS_LABEL_SIZE
];
453 __le64 cache_generation
;
454 __le64 uuid_tree_generation
;
456 /* future expansion */
458 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
459 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
460 } __attribute__ ((__packed__
));
463 * Compat flags that we support. If any incompat flags are set other than the
464 * ones specified below then we will fail to mount
466 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
468 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
469 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
470 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
471 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
474 * some patches floated around with a second compression method
475 * lets save that incompat here for when they do get in
476 * Note we don't actually support it, we're just reserving the
479 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
482 * older kernels tried to do bigger metadata blocks, but the
483 * code was pretty buggy. Lets not let them try anymore.
485 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
486 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
487 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
488 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
489 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
491 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
493 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
494 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
496 #define BTRFS_FEATURE_INCOMPAT_SUPP \
497 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
498 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
499 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
500 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
501 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
502 BTRFS_FEATURE_INCOMPAT_RAID56 | \
503 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
504 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
505 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
508 * A leaf is full of items. offset and size tell us where to find
509 * the item in the leaf (relative to the start of the data area)
512 struct btrfs_disk_key key
;
515 } __attribute__ ((__packed__
));
518 * leaves have an item area and a data area:
519 * [item0, item1....itemN] [free space] [dataN...data1, data0]
521 * The data is separate from the items to get the keys closer together
525 struct btrfs_header header
;
526 struct btrfs_item items
[];
527 } __attribute__ ((__packed__
));
530 * all non-leaf blocks are nodes, they hold only keys and pointers to
533 struct btrfs_key_ptr
{
534 struct btrfs_disk_key key
;
537 } __attribute__ ((__packed__
));
540 struct btrfs_header header
;
541 struct btrfs_key_ptr ptrs
[];
542 } __attribute__ ((__packed__
));
545 * btrfs_paths remember the path taken from the root down to the leaf.
546 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
547 * to any other levels that are present.
549 * The slots array records the index of the item or block pointer
550 * used while walking the tree.
554 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
555 int slots
[BTRFS_MAX_LEVEL
];
556 /* if there is real range locking, this locks field will change */
557 int locks
[BTRFS_MAX_LEVEL
];
559 /* keep some upper locks as we walk down */
563 * set by btrfs_split_item, tells search_slot to keep all locks
564 * and to force calls to keep space in the nodes
566 unsigned int search_for_split
:1;
567 unsigned int skip_check_block
:1;
571 * items in the extent btree are used to record the objectid of the
572 * owner of the block and the number of references
575 struct btrfs_extent_item
{
579 } __attribute__ ((__packed__
));
581 struct btrfs_extent_item_v0
{
583 } __attribute__ ((__packed__
));
585 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
586 sizeof(struct btrfs_item))
587 #define BTRFS_MAX_EXTENT_SIZE (128 * 1024 * 1024)
589 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
590 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
592 /* following flags only apply to tree blocks */
594 /* use full backrefs for extent pointers in the block*/
595 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
597 struct btrfs_tree_block_info
{
598 struct btrfs_disk_key key
;
600 } __attribute__ ((__packed__
));
602 struct btrfs_extent_data_ref
{
607 } __attribute__ ((__packed__
));
609 struct btrfs_shared_data_ref
{
611 } __attribute__ ((__packed__
));
613 struct btrfs_extent_inline_ref
{
616 } __attribute__ ((__packed__
));
618 struct btrfs_extent_ref_v0
{
623 } __attribute__ ((__packed__
));
625 /* dev extents record free space on individual devices. The owner
626 * field points back to the chunk allocation mapping tree that allocated
627 * the extent. The chunk tree uuid field is a way to double check the owner
629 struct btrfs_dev_extent
{
631 __le64 chunk_objectid
;
634 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
635 } __attribute__ ((__packed__
));
637 struct btrfs_inode_ref
{
641 } __attribute__ ((__packed__
));
643 struct btrfs_inode_extref
{
644 __le64 parent_objectid
;
647 __u8 name
[0]; /* name goes here */
648 } __attribute__ ((__packed__
));
650 struct btrfs_timespec
{
653 } __attribute__ ((__packed__
));
656 BTRFS_COMPRESS_NONE
= 0,
657 BTRFS_COMPRESS_ZLIB
= 1,
658 BTRFS_COMPRESS_LZO
= 2,
659 BTRFS_COMPRESS_TYPES
= 2,
660 BTRFS_COMPRESS_LAST
= 3,
661 } btrfs_compression_type
;
663 /* we don't understand any encryption methods right now */
665 BTRFS_ENCRYPTION_NONE
= 0,
666 BTRFS_ENCRYPTION_LAST
= 1,
667 } btrfs_encryption_type
;
669 enum btrfs_tree_block_status
{
670 BTRFS_TREE_BLOCK_CLEAN
,
671 BTRFS_TREE_BLOCK_INVALID_NRITEMS
,
672 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY
,
673 BTRFS_TREE_BLOCK_BAD_KEY_ORDER
,
674 BTRFS_TREE_BLOCK_INVALID_LEVEL
,
675 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE
,
676 BTRFS_TREE_BLOCK_INVALID_OFFSETS
,
679 struct btrfs_inode_item
{
680 /* nfs style generation number */
682 /* transid that last touched this inode */
694 /* modification sequence number for NFS */
698 * a little future expansion, for more than this we can
699 * just grow the inode item and version it
702 struct btrfs_timespec atime
;
703 struct btrfs_timespec ctime
;
704 struct btrfs_timespec mtime
;
705 struct btrfs_timespec otime
;
706 } __attribute__ ((__packed__
));
708 struct btrfs_dir_log_item
{
710 } __attribute__ ((__packed__
));
712 struct btrfs_dir_item
{
713 struct btrfs_disk_key location
;
718 } __attribute__ ((__packed__
));
720 struct btrfs_root_item_v0
{
721 struct btrfs_inode_item inode
;
727 __le64 last_snapshot
;
730 struct btrfs_disk_key drop_progress
;
733 } __attribute__ ((__packed__
));
735 struct btrfs_root_item
{
736 struct btrfs_inode_item inode
;
742 __le64 last_snapshot
;
745 struct btrfs_disk_key drop_progress
;
750 * The following fields appear after subvol_uuids+subvol_times
755 * This generation number is used to test if the new fields are valid
756 * and up to date while reading the root item. Every time the root item
757 * is written out, the "generation" field is copied into this field. If
758 * anyone ever mounted the fs with an older kernel, we will have
759 * mismatching generation values here and thus must invalidate the
760 * new fields. See btrfs_update_root and btrfs_find_last_root for
762 * the offset of generation_v2 is also used as the start for the memset
763 * when invalidating the fields.
765 __le64 generation_v2
;
766 u8 uuid
[BTRFS_UUID_SIZE
];
767 u8 parent_uuid
[BTRFS_UUID_SIZE
];
768 u8 received_uuid
[BTRFS_UUID_SIZE
];
769 __le64 ctransid
; /* updated when an inode changes */
770 __le64 otransid
; /* trans when created */
771 __le64 stransid
; /* trans when sent. non-zero for received subvol */
772 __le64 rtransid
; /* trans when received. non-zero for received subvol */
773 struct btrfs_timespec ctime
;
774 struct btrfs_timespec otime
;
775 struct btrfs_timespec stime
;
776 struct btrfs_timespec rtime
;
777 __le64 reserved
[8]; /* for future */
778 } __attribute__ ((__packed__
));
781 * this is used for both forward and backward root refs
783 struct btrfs_root_ref
{
787 } __attribute__ ((__packed__
));
789 #define BTRFS_FILE_EXTENT_INLINE 0
790 #define BTRFS_FILE_EXTENT_REG 1
791 #define BTRFS_FILE_EXTENT_PREALLOC 2
793 struct btrfs_file_extent_item
{
795 * transaction id that created this extent
799 * max number of bytes to hold this extent in ram
800 * when we split a compressed extent we can't know how big
801 * each of the resulting pieces will be. So, this is
802 * an upper limit on the size of the extent in ram instead of
808 * 32 bits for the various ways we might encode the data,
809 * including compression and encryption. If any of these
810 * are set to something a given disk format doesn't understand
811 * it is treated like an incompat flag for reading and writing,
816 __le16 other_encoding
; /* spare for later use */
818 /* are we inline data or a real extent? */
822 * disk space consumed by the extent, checksum blocks are included
826 __le64 disk_num_bytes
;
828 * the logical offset in file blocks (no csums)
829 * this extent record is for. This allows a file extent to point
830 * into the middle of an existing extent on disk, sharing it
831 * between two snapshots (useful if some bytes in the middle of the
832 * extent have changed
836 * the logical number of file blocks (no csums included)
840 } __attribute__ ((__packed__
));
842 struct btrfs_csum_item
{
844 } __attribute__ ((__packed__
));
847 * We don't want to overwrite 1M at the beginning of device, even though
848 * there is our 1st superblock at 64k. Some possible reasons:
849 * - the first 64k blank is useful for some boot loader/manager
850 * - the first 1M could be scratched by buggy partitioner or somesuch
852 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
854 /* tag for the radix tree of block groups in ram */
855 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
856 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
857 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
858 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
859 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
860 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
861 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
862 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
863 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
864 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
865 #define BTRFS_NR_RAID_TYPES 7
867 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
868 BTRFS_BLOCK_GROUP_SYSTEM | \
869 BTRFS_BLOCK_GROUP_METADATA)
871 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
872 BTRFS_BLOCK_GROUP_RAID1 | \
873 BTRFS_BLOCK_GROUP_RAID5 | \
874 BTRFS_BLOCK_GROUP_RAID6 | \
875 BTRFS_BLOCK_GROUP_DUP | \
876 BTRFS_BLOCK_GROUP_RAID10)
878 /* used in struct btrfs_balance_args fields */
879 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
882 * GLOBAL_RSV does not exist as a on-disk block group type and is used
883 * internally for exporting info about global block reserve from space infos
885 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
887 #define BTRFS_QGROUP_LEVEL_SHIFT 48
889 static inline u64
btrfs_qgroup_level(u64 qgroupid
)
891 return qgroupid
>> BTRFS_QGROUP_LEVEL_SHIFT
;
894 static inline u64
btrfs_qgroup_subvid(u64 qgroupid
)
896 return qgroupid
& ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT
) - 1);
899 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
900 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
901 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
903 struct btrfs_qgroup_status_item
{
907 __le64 rescan
; /* progress during scanning */
908 } __attribute__ ((__packed__
));
910 struct btrfs_block_group_item
{
912 __le64 chunk_objectid
;
914 } __attribute__ ((__packed__
));
916 struct btrfs_free_space_info
{
919 } __attribute__ ((__packed__
));
921 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
923 struct btrfs_qgroup_info_item
{
926 __le64 referenced_compressed
;
928 __le64 exclusive_compressed
;
929 } __attribute__ ((__packed__
));
931 /* flags definition for qgroup limits */
932 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
933 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
934 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
935 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
936 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
937 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
939 struct btrfs_qgroup_limit_item
{
941 __le64 max_referenced
;
942 __le64 max_exclusive
;
943 __le64 rsv_referenced
;
944 __le64 rsv_exclusive
;
945 } __attribute__ ((__packed__
));
947 struct btrfs_space_info
{
953 struct list_head list
;
956 struct btrfs_block_group_cache
{
957 struct cache_extent cache
;
958 struct btrfs_key key
;
959 struct btrfs_block_group_item item
;
960 struct btrfs_space_info
*space_info
;
961 struct btrfs_free_space_ctl
*free_space_ctl
;
970 struct btrfs_fs_devices
;
971 struct btrfs_fs_info
{
972 u8 fsid
[BTRFS_FSID_SIZE
];
974 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
975 u8
*new_chunk_tree_uuid
;
976 struct btrfs_root
*fs_root
;
977 struct btrfs_root
*extent_root
;
978 struct btrfs_root
*tree_root
;
979 struct btrfs_root
*chunk_root
;
980 struct btrfs_root
*dev_root
;
981 struct btrfs_root
*csum_root
;
982 struct btrfs_root
*quota_root
;
983 struct btrfs_root
*free_space_root
;
985 struct rb_root fs_root_tree
;
987 /* the log root tree is a directory of all the other log roots */
988 struct btrfs_root
*log_root_tree
;
990 struct extent_io_tree extent_cache
;
991 struct extent_io_tree free_space_cache
;
992 struct extent_io_tree block_group_cache
;
993 struct extent_io_tree pinned_extents
;
994 struct extent_io_tree pending_del
;
995 struct extent_io_tree extent_ins
;
996 struct extent_io_tree
*excluded_extents
;
998 /* logical->physical extent mapping */
999 struct btrfs_mapping_tree mapping_tree
;
1002 u64 last_trans_committed
;
1004 u64 avail_data_alloc_bits
;
1005 u64 avail_metadata_alloc_bits
;
1006 u64 avail_system_alloc_bits
;
1007 u64 data_alloc_profile
;
1008 u64 metadata_alloc_profile
;
1009 u64 system_alloc_profile
;
1012 struct btrfs_trans_handle
*running_transaction
;
1013 struct btrfs_super_block
*super_copy
;
1014 struct mutex fs_mutex
;
1019 struct list_head dirty_cowonly_roots
;
1020 struct list_head recow_ebs
;
1022 struct btrfs_fs_devices
*fs_devices
;
1023 struct list_head space_info
;
1026 unsigned int readonly
:1;
1027 unsigned int on_restoring
:1;
1028 unsigned int is_chunk_recover
:1;
1029 unsigned int quota_enabled
:1;
1030 unsigned int suppress_check_block_errors
:1;
1031 unsigned int ignore_fsid_mismatch
:1;
1032 unsigned int ignore_chunk_tree_error
:1;
1033 unsigned int avoid_meta_chunk_alloc
:1;
1034 unsigned int avoid_sys_chunk_alloc
:1;
1035 unsigned int finalize_on_close
:1;
1037 int (*free_extent_hook
)(struct btrfs_trans_handle
*trans
,
1038 struct btrfs_root
*root
,
1039 u64 bytenr
, u64 num_bytes
, u64 parent
,
1040 u64 root_objectid
, u64 owner
, u64 offset
,
1042 struct cache_tree
*fsck_extent_cache
;
1043 struct cache_tree
*corrupt_blocks
;
1048 * in ram representation of the tree. extent_root is used for all allocations
1049 * and for the extent tree extent_root root.
1052 struct extent_buffer
*node
;
1053 struct extent_buffer
*commit_root
;
1054 struct btrfs_root_item root_item
;
1055 struct btrfs_key root_key
;
1056 struct btrfs_fs_info
*fs_info
;
1060 /* data allocations are done in sectorsize units */
1063 /* node allocations are done in nodesize units */
1066 /* Unused, equal to nodesize */
1069 /* leaf allocations are done in nodesize units */
1078 u64 last_inode_alloc
;
1081 * Record orphan data extent ref
1083 * TODO: Don't restore things in btrfs_root.
1084 * Directly record it into inode_record, which needs a lot of
1085 * infrastructure change to allow cooperation between extent
1088 struct list_head orphan_data_extents
;
1090 /* the dirty list is only used by non-reference counted roots */
1091 struct list_head dirty_list
;
1092 struct rb_node rb_node
;
1096 * inode items have the data typically returned from stat and store other
1097 * info about object characteristics. There is one for every file and dir in
1100 #define BTRFS_INODE_ITEM_KEY 1
1101 #define BTRFS_INODE_REF_KEY 12
1102 #define BTRFS_INODE_EXTREF_KEY 13
1103 #define BTRFS_XATTR_ITEM_KEY 24
1104 #define BTRFS_ORPHAN_ITEM_KEY 48
1106 #define BTRFS_DIR_LOG_ITEM_KEY 60
1107 #define BTRFS_DIR_LOG_INDEX_KEY 72
1109 * dir items are the name -> inode pointers in a directory. There is one
1110 * for every name in a directory.
1112 #define BTRFS_DIR_ITEM_KEY 84
1113 #define BTRFS_DIR_INDEX_KEY 96
1116 * extent data is for file data
1118 #define BTRFS_EXTENT_DATA_KEY 108
1121 * csum items have the checksums for data in the extents
1123 #define BTRFS_CSUM_ITEM_KEY 120
1125 * extent csums are stored in a separate tree and hold csums for
1126 * an entire extent on disk.
1128 #define BTRFS_EXTENT_CSUM_KEY 128
1131 * root items point to tree roots. There are typically in the root
1132 * tree used by the super block to find all the other trees
1134 #define BTRFS_ROOT_ITEM_KEY 132
1137 * root backrefs tie subvols and snapshots to the directory entries that
1140 #define BTRFS_ROOT_BACKREF_KEY 144
1143 * root refs make a fast index for listing all of the snapshots and
1144 * subvolumes referenced by a given root. They point directly to the
1145 * directory item in the root that references the subvol
1147 #define BTRFS_ROOT_REF_KEY 156
1150 * extent items are in the extent map tree. These record which blocks
1151 * are used, and how many references there are to each block
1153 #define BTRFS_EXTENT_ITEM_KEY 168
1156 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1157 * the length, so we save the level in key->offset instead of the length.
1159 #define BTRFS_METADATA_ITEM_KEY 169
1161 #define BTRFS_TREE_BLOCK_REF_KEY 176
1163 #define BTRFS_EXTENT_DATA_REF_KEY 178
1165 /* old style extent backrefs */
1166 #define BTRFS_EXTENT_REF_V0_KEY 180
1168 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1170 #define BTRFS_SHARED_DATA_REF_KEY 184
1174 * block groups give us hints into the extent allocation trees. Which
1175 * blocks are free etc etc
1177 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1180 * Every block group is represented in the free space tree by a free space info
1181 * item, which stores some accounting information. It is keyed on
1182 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1184 #define BTRFS_FREE_SPACE_INFO_KEY 198
1187 * A free space extent tracks an extent of space that is free in a block group.
1188 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1190 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1193 * When a block group becomes very fragmented, we convert it to use bitmaps
1194 * instead of extents. A free space bitmap is keyed on
1195 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1196 * (length / sectorsize) bits.
1198 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1200 #define BTRFS_DEV_EXTENT_KEY 204
1201 #define BTRFS_DEV_ITEM_KEY 216
1202 #define BTRFS_CHUNK_ITEM_KEY 228
1204 #define BTRFS_BALANCE_ITEM_KEY 248
1209 #define BTRFS_QGROUP_STATUS_KEY 240
1210 #define BTRFS_QGROUP_INFO_KEY 242
1211 #define BTRFS_QGROUP_LIMIT_KEY 244
1212 #define BTRFS_QGROUP_RELATION_KEY 246
1215 * Persistently stores the io stats in the device tree.
1216 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1218 #define BTRFS_DEV_STATS_KEY 249
1221 * Persistently stores the device replace state in the device tree.
1222 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1224 #define BTRFS_DEV_REPLACE_KEY 250
1227 * Stores items that allow to quickly map UUIDs to something else.
1228 * These items are part of the filesystem UUID tree.
1229 * The key is built like this:
1230 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1232 #if BTRFS_UUID_SIZE != 16
1233 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1235 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1236 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1237 * received subvols */
1240 * string items are for debugging. They just store a short string of
1243 #define BTRFS_STRING_ITEM_KEY 253
1247 #define BTRFS_INODE_NODATASUM (1 << 0)
1248 #define BTRFS_INODE_NODATACOW (1 << 1)
1249 #define BTRFS_INODE_READONLY (1 << 2)
1251 #define read_eb_member(eb, ptr, type, member, result) ( \
1252 read_extent_buffer(eb, (char *)(result), \
1253 ((unsigned long)(ptr)) + \
1254 offsetof(type, member), \
1255 sizeof(((type *)0)->member)))
1257 #define write_eb_member(eb, ptr, type, member, result) ( \
1258 write_extent_buffer(eb, (char *)(result), \
1259 ((unsigned long)(ptr)) + \
1260 offsetof(type, member), \
1261 sizeof(((type *)0)->member)))
1263 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1264 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1266 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1267 return le##bits##_to_cpu(h->member); \
1269 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1272 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1273 h->member = cpu_to_le##bits(val); \
1276 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1277 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1280 unsigned long offset = (unsigned long)s; \
1281 const type *p = (type *) (eb->data + offset); \
1282 return get_unaligned_le##bits(&p->member); \
1284 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1285 type *s, u##bits val) \
1287 unsigned long offset = (unsigned long)s; \
1288 type *p = (type *) (eb->data + offset); \
1289 put_unaligned_le##bits(val, &p->member); \
1292 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1293 static inline u##bits btrfs_##name(const type *s) \
1295 return le##bits##_to_cpu(s->member); \
1297 static inline void btrfs_set_##name(type *s, u##bits val) \
1299 s->member = cpu_to_le##bits(val); \
1302 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1303 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1304 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1305 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1306 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1307 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1309 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1310 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1311 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1312 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1313 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1314 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1316 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1317 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1319 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1321 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1323 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1325 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1327 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1328 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1330 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1332 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1334 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1337 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1339 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1342 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1344 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1347 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1348 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1349 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1350 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1351 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1352 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1353 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1354 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1355 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1356 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1357 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1359 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1361 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1364 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1365 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1366 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1368 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1370 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1372 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1374 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1375 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1377 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1379 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1380 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1382 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1385 unsigned long offset
= (unsigned long)c
;
1386 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1387 offset
+= nr
* sizeof(struct btrfs_stripe
);
1388 return (struct btrfs_stripe
*)offset
;
1391 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1393 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1396 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1397 struct btrfs_chunk
*c
, int nr
)
1399 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1402 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1403 struct btrfs_chunk
*c
, int nr
,
1406 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1409 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1410 struct btrfs_chunk
*c
, int nr
)
1412 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1415 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1416 struct btrfs_chunk
*c
, int nr
,
1419 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1422 /* struct btrfs_block_group_item */
1423 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1425 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1427 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1428 struct btrfs_block_group_item
, chunk_objectid
, 64);
1430 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1431 struct btrfs_block_group_item
, chunk_objectid
, 64);
1432 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1433 struct btrfs_block_group_item
, flags
, 64);
1434 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1435 struct btrfs_block_group_item
, flags
, 64);
1437 /* struct btrfs_free_space_info */
1438 BTRFS_SETGET_FUNCS(free_space_extent_count
, struct btrfs_free_space_info
,
1440 BTRFS_SETGET_FUNCS(free_space_flags
, struct btrfs_free_space_info
, flags
, 32);
1442 /* struct btrfs_inode_ref */
1443 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1444 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1445 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1447 /* struct btrfs_inode_extref */
1448 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1449 parent_objectid
, 64);
1450 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1452 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1454 /* struct btrfs_inode_item */
1455 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1456 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1457 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1458 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1459 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1460 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1461 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1462 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1463 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1464 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1465 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1466 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1468 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
1469 struct btrfs_inode_item
, generation
, 64);
1470 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
,
1471 struct btrfs_inode_item
, sequence
, 64);
1472 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
,
1473 struct btrfs_inode_item
, transid
, 64);
1474 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
1475 struct btrfs_inode_item
, size
, 64);
1476 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
,
1477 struct btrfs_inode_item
, nbytes
, 64);
1478 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
1479 struct btrfs_inode_item
, block_group
, 64);
1480 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
1481 struct btrfs_inode_item
, nlink
, 32);
1482 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
1483 struct btrfs_inode_item
, uid
, 32);
1484 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
1485 struct btrfs_inode_item
, gid
, 32);
1486 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
1487 struct btrfs_inode_item
, mode
, 32);
1488 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
1489 struct btrfs_inode_item
, rdev
, 64);
1490 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
1491 struct btrfs_inode_item
, flags
, 64);
1493 static inline struct btrfs_timespec
*
1494 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1496 unsigned long ptr
= (unsigned long)inode_item
;
1497 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1498 return (struct btrfs_timespec
*)ptr
;
1501 static inline struct btrfs_timespec
*
1502 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1504 unsigned long ptr
= (unsigned long)inode_item
;
1505 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1506 return (struct btrfs_timespec
*)ptr
;
1509 static inline struct btrfs_timespec
*
1510 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1512 unsigned long ptr
= (unsigned long)inode_item
;
1513 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1514 return (struct btrfs_timespec
*)ptr
;
1517 static inline struct btrfs_timespec
*
1518 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1520 unsigned long ptr
= (unsigned long)inode_item
;
1521 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1522 return (struct btrfs_timespec
*)ptr
;
1525 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1526 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1527 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
1529 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
1532 /* struct btrfs_dev_extent */
1533 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1535 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1536 chunk_objectid
, 64);
1537 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1539 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1541 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length
, struct btrfs_dev_extent
,
1544 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1546 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1547 return (u8
*)((unsigned long)dev
+ ptr
);
1551 /* struct btrfs_extent_item */
1552 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1553 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
, refs
, 64);
1554 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1556 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1557 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags
, struct btrfs_extent_item
, flags
, 64);
1559 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1561 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1563 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1564 struct btrfs_tree_block_info
*item
,
1565 struct btrfs_disk_key
*key
)
1567 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1570 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1571 struct btrfs_tree_block_info
*item
,
1572 struct btrfs_disk_key
*key
)
1574 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1577 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1579 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1581 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1583 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1586 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1589 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1591 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1593 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type
,
1594 struct btrfs_extent_inline_ref
, type
, 8);
1595 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset
,
1596 struct btrfs_extent_inline_ref
, offset
, 64);
1598 static inline u32
btrfs_extent_inline_ref_size(int type
)
1600 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1601 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1602 return sizeof(struct btrfs_extent_inline_ref
);
1603 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1604 return sizeof(struct btrfs_shared_data_ref
) +
1605 sizeof(struct btrfs_extent_inline_ref
);
1606 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1607 return sizeof(struct btrfs_extent_data_ref
) +
1608 offsetof(struct btrfs_extent_inline_ref
, offset
);
1613 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1614 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1616 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1617 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1619 /* struct btrfs_node */
1620 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1621 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1623 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1626 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1627 sizeof(struct btrfs_key_ptr
) * nr
;
1628 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1631 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1635 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1636 sizeof(struct btrfs_key_ptr
) * nr
;
1637 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1640 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1643 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1644 sizeof(struct btrfs_key_ptr
) * nr
;
1645 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1648 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1652 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1653 sizeof(struct btrfs_key_ptr
) * nr
;
1654 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1657 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1659 return offsetof(struct btrfs_node
, ptrs
) +
1660 sizeof(struct btrfs_key_ptr
) * nr
;
1663 static inline void btrfs_node_key(struct extent_buffer
*eb
,
1664 struct btrfs_disk_key
*disk_key
, int nr
)
1667 ptr
= btrfs_node_key_ptr_offset(nr
);
1668 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1669 struct btrfs_key_ptr
, key
, disk_key
);
1672 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1673 struct btrfs_disk_key
*disk_key
, int nr
)
1676 ptr
= btrfs_node_key_ptr_offset(nr
);
1677 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1678 struct btrfs_key_ptr
, key
, disk_key
);
1681 /* struct btrfs_item */
1682 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1683 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1685 static inline unsigned long btrfs_item_nr_offset(int nr
)
1687 return offsetof(struct btrfs_leaf
, items
) +
1688 sizeof(struct btrfs_item
) * nr
;
1691 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1693 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1696 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1697 struct btrfs_item
*item
)
1699 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1702 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1704 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
1707 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1709 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
1712 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1714 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
1717 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1718 struct btrfs_disk_key
*disk_key
, int nr
)
1720 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1721 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1724 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1725 struct btrfs_disk_key
*disk_key
, int nr
)
1727 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1728 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1731 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1734 * struct btrfs_root_ref
1736 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1737 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1738 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1740 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1741 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1742 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1744 /* struct btrfs_dir_item */
1745 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1746 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1747 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1748 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1750 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1752 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1753 struct btrfs_dir_item
*item
,
1754 struct btrfs_disk_key
*key
)
1756 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1759 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1760 struct btrfs_dir_item
*item
,
1761 struct btrfs_disk_key
*key
)
1763 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1766 /* struct btrfs_free_space_header */
1767 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1769 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1771 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1774 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1775 struct btrfs_free_space_header
*h
,
1776 struct btrfs_disk_key
*key
)
1778 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1781 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1782 struct btrfs_free_space_header
*h
,
1783 struct btrfs_disk_key
*key
)
1785 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1788 /* struct btrfs_disk_key */
1789 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1791 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1792 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1794 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1795 struct btrfs_disk_key
*disk
)
1797 cpu
->offset
= le64_to_cpu(disk
->offset
);
1798 cpu
->type
= disk
->type
;
1799 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1802 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1803 struct btrfs_key
*cpu
)
1805 disk
->offset
= cpu_to_le64(cpu
->offset
);
1806 disk
->type
= cpu
->type
;
1807 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1810 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1811 struct btrfs_key
*key
, int nr
)
1813 struct btrfs_disk_key disk_key
;
1814 btrfs_node_key(eb
, &disk_key
, nr
);
1815 btrfs_disk_key_to_cpu(key
, &disk_key
);
1818 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1819 struct btrfs_key
*key
, int nr
)
1821 struct btrfs_disk_key disk_key
;
1822 btrfs_item_key(eb
, &disk_key
, nr
);
1823 btrfs_disk_key_to_cpu(key
, &disk_key
);
1826 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1827 struct btrfs_dir_item
*item
,
1828 struct btrfs_key
*key
)
1830 struct btrfs_disk_key disk_key
;
1831 btrfs_dir_item_key(eb
, item
, &disk_key
);
1832 btrfs_disk_key_to_cpu(key
, &disk_key
);
1836 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1841 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1846 /* struct btrfs_header */
1847 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1848 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1850 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1851 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1852 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1853 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1854 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
1855 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
, nritems
,
1857 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
1858 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
1861 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1863 return (btrfs_header_flags(eb
) & flag
) == flag
;
1866 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1868 u64 flags
= btrfs_header_flags(eb
);
1869 btrfs_set_header_flags(eb
, flags
| flag
);
1870 return (flags
& flag
) == flag
;
1873 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1875 u64 flags
= btrfs_header_flags(eb
);
1876 btrfs_set_header_flags(eb
, flags
& ~flag
);
1877 return (flags
& flag
) == flag
;
1880 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1882 u64 flags
= btrfs_header_flags(eb
);
1883 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1886 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1889 u64 flags
= btrfs_header_flags(eb
);
1890 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1891 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1892 btrfs_set_header_flags(eb
, flags
);
1895 static inline unsigned long btrfs_header_fsid(void)
1897 return offsetof(struct btrfs_header
, fsid
);
1900 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1902 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
1905 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1907 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1911 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1913 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1917 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1922 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1927 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1932 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1934 return (btrfs_header_level(eb
) == 0);
1937 /* struct btrfs_root_item */
1938 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1940 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1941 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1942 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1944 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1946 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1947 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1948 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1949 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1950 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1951 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1952 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1953 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1955 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
1957 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
1959 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
1961 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
1963 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
1966 /* struct btrfs_root_backup */
1967 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
1969 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
1971 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
1972 tree_root_level
, 8);
1974 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
1976 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
1977 chunk_root_gen
, 64);
1978 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
1979 chunk_root_level
, 8);
1981 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
1983 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
1984 extent_root_gen
, 64);
1985 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
1986 extent_root_level
, 8);
1988 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
1990 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
1992 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
1995 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
1997 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
1999 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2002 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2004 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2006 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2007 csum_root_level
, 8);
2008 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2010 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2012 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2015 /* struct btrfs_super_block */
2017 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2018 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2019 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2021 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2022 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2023 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2024 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2025 struct btrfs_super_block
, chunk_root_generation
, 64);
2026 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2028 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2030 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2031 chunk_root_level
, 8);
2032 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2034 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2035 log_root_transid
, 64);
2036 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2038 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2040 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2042 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2044 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2046 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2048 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2050 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2051 root_dir_objectid
, 64);
2052 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2054 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2056 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2057 compat_ro_flags
, 64);
2058 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2059 incompat_flags
, 64);
2060 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2062 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2063 cache_generation
, 64);
2064 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2065 uuid_tree_generation
, 64);
2066 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2068 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2070 int t
= btrfs_super_csum_type(s
);
2071 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2072 return btrfs_csum_sizes
[t
];
2075 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2077 return offsetof(struct btrfs_leaf
, items
);
2080 /* struct btrfs_file_extent_item */
2081 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2082 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2084 static inline unsigned long btrfs_file_extent_inline_start(struct
2085 btrfs_file_extent_item
*e
)
2087 unsigned long offset
= (unsigned long)e
;
2088 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2092 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2094 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2097 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2099 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2101 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2103 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
, struct btrfs_file_extent_item
,
2105 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2106 disk_num_bytes
, 64);
2107 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2109 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
, struct btrfs_file_extent_item
,
2111 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2113 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
, struct btrfs_file_extent_item
,
2115 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2117 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2119 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2121 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
, struct btrfs_file_extent_item
,
2123 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2125 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2126 other_encoding
, 16);
2128 /* btrfs_qgroup_status_item */
2129 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2131 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2133 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2135 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
2138 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version
,
2139 struct btrfs_qgroup_status_item
, version
, 64);
2140 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation
,
2141 struct btrfs_qgroup_status_item
, generation
, 64);
2142 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags
,
2143 struct btrfs_qgroup_status_item
, flags
, 64);
2144 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan
,
2145 struct btrfs_qgroup_status_item
, rescan
, 64);
2147 /* btrfs_qgroup_info_item */
2148 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2150 BTRFS_SETGET_FUNCS(qgroup_info_referenced
, struct btrfs_qgroup_info_item
,
2152 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed
,
2153 struct btrfs_qgroup_info_item
, referenced_compressed
, 64);
2154 BTRFS_SETGET_FUNCS(qgroup_info_exclusive
, struct btrfs_qgroup_info_item
,
2156 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed
,
2157 struct btrfs_qgroup_info_item
, exclusive_compressed
, 64);
2159 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2160 struct btrfs_qgroup_info_item
, generation
, 64);
2161 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced
,
2162 struct btrfs_qgroup_info_item
, referenced
, 64);
2163 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed
,
2164 struct btrfs_qgroup_info_item
, referenced_compressed
, 64);
2165 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive
,
2166 struct btrfs_qgroup_info_item
, exclusive
, 64);
2167 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed
,
2168 struct btrfs_qgroup_info_item
, exclusive_compressed
, 64);
2170 /* btrfs_qgroup_limit_item */
2171 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2173 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced
, struct btrfs_qgroup_limit_item
,
2174 max_referenced
, 64);
2175 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive
, struct btrfs_qgroup_limit_item
,
2177 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced
, struct btrfs_qgroup_limit_item
,
2178 rsv_referenced
, 64);
2179 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive
, struct btrfs_qgroup_limit_item
,
2182 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags
,
2183 struct btrfs_qgroup_limit_item
, flags
, 64);
2184 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced
,
2185 struct btrfs_qgroup_limit_item
, max_referenced
, 64);
2186 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive
,
2187 struct btrfs_qgroup_limit_item
, max_exclusive
, 64);
2188 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced
,
2189 struct btrfs_qgroup_limit_item
, rsv_referenced
, 64);
2190 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive
,
2191 struct btrfs_qgroup_limit_item
, rsv_exclusive
, 64);
2194 * this returns the number of bytes used by the item on disk, minus the
2195 * size of any extent headers. If a file is compressed on disk, this is
2196 * the compressed size
2198 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2199 struct btrfs_item
*e
)
2201 unsigned long offset
;
2202 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2203 return btrfs_item_size(eb
, e
) - offset
;
2206 /* struct btrfs_ioctl_search_header */
2207 static inline u64
btrfs_search_header_transid(struct btrfs_ioctl_search_header
*sh
)
2209 return get_unaligned_64(&sh
->transid
);
2212 static inline u64
btrfs_search_header_objectid(struct btrfs_ioctl_search_header
*sh
)
2214 return get_unaligned_64(&sh
->objectid
);
2217 static inline u64
btrfs_search_header_offset(struct btrfs_ioctl_search_header
*sh
)
2219 return get_unaligned_64(&sh
->offset
);
2222 static inline u32
btrfs_search_header_type(struct btrfs_ioctl_search_header
*sh
)
2224 return get_unaligned_32(&sh
->type
);
2227 static inline u32
btrfs_search_header_len(struct btrfs_ioctl_search_header
*sh
)
2229 return get_unaligned_32(&sh
->len
);
2232 /* this returns the number of file bytes represented by the inline item.
2233 * If an item is compressed, this is the uncompressed size
2235 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2237 struct btrfs_file_extent_item
*fi
)
2240 * return the space used on disk if this item isn't
2241 * compressed or encoded
2243 if (btrfs_file_extent_compression(eb
, fi
) == 0 &&
2244 btrfs_file_extent_encryption(eb
, fi
) == 0 &&
2245 btrfs_file_extent_other_encoding(eb
, fi
) == 0) {
2246 return btrfs_file_extent_inline_item_len(eb
,
2247 btrfs_item_nr(slot
));
2250 /* otherwise use the ram bytes field */
2251 return btrfs_file_extent_ram_bytes(eb
, fi
);
2255 * NOTE: Backward compatibility, do not use.
2256 * Replacement: read nodesize directly
2258 __attribute__((deprecated
))
2259 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
2261 return root
->leafsize
;
2262 return root
->nodesize
;
2265 static inline int btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
2267 struct btrfs_super_block
*disk_super
;
2268 disk_super
= fs_info
->super_copy
;
2269 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
2272 static inline int btrfs_fs_compat_ro(struct btrfs_fs_info
*fs_info
, u64 flag
)
2274 struct btrfs_super_block
*disk_super
;
2275 disk_super
= fs_info
->super_copy
;
2276 return !!(btrfs_super_compat_ro_flags(disk_super
) & flag
);
2279 /* helper function to cast into the data area of the leaf. */
2280 #define btrfs_item_ptr(leaf, slot, type) \
2281 ((type *)(btrfs_leaf_data(leaf) + \
2282 btrfs_item_offset_nr(leaf, slot)))
2284 #define btrfs_item_ptr_offset(leaf, slot) \
2285 ((unsigned long)(btrfs_leaf_data(leaf) + \
2286 btrfs_item_offset_nr(leaf, slot)))
2289 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2290 struct btrfs_root
*root
,
2291 u64 num_bytes
, u64 empty_size
,
2292 u64 hint_byte
, u64 search_end
,
2293 struct btrfs_key
*ins
, int data
);
2294 int btrfs_fix_block_accounting(struct btrfs_trans_handle
*trans
,
2295 struct btrfs_root
*root
);
2296 void btrfs_pin_extent(struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 num_bytes
);
2297 void btrfs_unpin_extent(struct btrfs_fs_info
*fs_info
,
2298 u64 bytenr
, u64 num_bytes
);
2299 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
2300 struct btrfs_root
*root
);
2301 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
2302 btrfs_fs_info
*info
,
2304 struct btrfs_block_group_cache
*btrfs_lookup_first_block_group(struct
2305 btrfs_fs_info
*info
,
2307 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2308 struct btrfs_root
*root
,
2309 u32 blocksize
, u64 root_objectid
,
2310 struct btrfs_disk_key
*key
, int level
,
2311 u64 hint
, u64 empty_size
);
2312 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
2313 struct btrfs_root
*root
,
2314 u64 num_bytes
, u64 parent
,
2315 u64 root_objectid
, u64 ref_generation
,
2316 u64 owner
, u64 empty_size
, u64 hint_byte
,
2317 u64 search_end
, struct btrfs_key
*ins
, int data
);
2318 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2319 struct btrfs_root
*root
, u64 bytenr
,
2320 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2321 int btrfs_set_block_flags(struct btrfs_trans_handle
*trans
,
2322 struct btrfs_root
*root
,
2323 u64 bytenr
, int level
, u64 flags
);
2324 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2325 struct extent_buffer
*buf
, int record_parent
);
2326 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2327 struct extent_buffer
*buf
, int record_parent
);
2328 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2329 struct btrfs_root
*root
,
2330 u64 bytenr
, u64 num_bytes
, u64 parent
,
2331 u64 root_objectid
, u64 owner
, u64 offset
);
2332 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2333 struct btrfs_root
*root
,
2334 struct extent_io_tree
*unpin
);
2335 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2336 struct btrfs_root
*root
,
2337 u64 bytenr
, u64 num_bytes
, u64 parent
,
2338 u64 root_objectid
, u64 ref_generation
,
2339 u64 owner_objectid
);
2340 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
2341 struct btrfs_root
*root
, u64 bytenr
,
2342 u64 orig_parent
, u64 parent
,
2343 u64 root_objectid
, u64 ref_generation
,
2344 u64 owner_objectid
);
2345 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2346 struct btrfs_root
*root
);
2347 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2348 int btrfs_read_block_groups(struct btrfs_root
*root
);
2349 struct btrfs_block_group_cache
*
2350 btrfs_add_block_group(struct btrfs_fs_info
*fs_info
, u64 bytes_used
, u64 type
,
2351 u64 chunk_objectid
, u64 chunk_offset
, u64 size
);
2352 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2353 struct btrfs_root
*root
, u64 bytes_used
,
2354 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2356 int btrfs_make_block_groups(struct btrfs_trans_handle
*trans
,
2357 struct btrfs_root
*root
);
2358 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
2359 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
2360 int alloc
, int mark_free
);
2361 int btrfs_record_file_extent(struct btrfs_trans_handle
*trans
,
2362 struct btrfs_root
*root
, u64 objectid
,
2363 struct btrfs_inode_item
*inode
,
2364 u64 file_pos
, u64 disk_bytenr
,
2366 int btrfs_free_block_group(struct btrfs_trans_handle
*trans
,
2367 struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 len
);
2368 void free_excluded_extents(struct btrfs_root
*root
,
2369 struct btrfs_block_group_cache
*cache
);
2370 int exclude_super_stripes(struct btrfs_root
*root
,
2371 struct btrfs_block_group_cache
*cache
);
2372 u64
add_new_free_space(struct btrfs_block_group_cache
*block_group
,
2373 struct btrfs_fs_info
*info
, u64 start
, u64 end
);
2374 u64
hash_extent_data_ref(u64 root_objectid
, u64 owner
, u64 offset
);
2377 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2378 int btrfs_del_ptr(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2379 struct btrfs_path
*path
, int level
, int slot
);
2380 enum btrfs_tree_block_status
2381 btrfs_check_node(struct btrfs_root
*root
, struct btrfs_disk_key
*parent_key
,
2382 struct extent_buffer
*buf
);
2383 enum btrfs_tree_block_status
2384 btrfs_check_leaf(struct btrfs_root
*root
, struct btrfs_disk_key
*parent_key
,
2385 struct extent_buffer
*buf
);
2386 void reada_for_search(struct btrfs_root
*root
, struct btrfs_path
*path
,
2387 int level
, int slot
, u64 objectid
);
2388 struct extent_buffer
*read_node_slot(struct btrfs_root
*root
,
2389 struct extent_buffer
*parent
, int slot
);
2390 int btrfs_previous_item(struct btrfs_root
*root
,
2391 struct btrfs_path
*path
, u64 min_objectid
,
2393 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2394 struct btrfs_path
*path
, u64 min_objectid
);
2395 int btrfs_next_extent_item(struct btrfs_root
*root
,
2396 struct btrfs_path
*path
, u64 max_objectid
);
2397 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2398 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2399 struct extent_buffer
*parent
, int parent_slot
,
2400 struct extent_buffer
**cow_ret
);
2401 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2402 struct btrfs_root
*root
,
2403 struct extent_buffer
*buf
,
2404 struct extent_buffer
*parent
, int parent_slot
,
2405 struct extent_buffer
**cow_ret
,
2406 u64 search_start
, u64 empty_size
);
2407 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2408 struct btrfs_root
*root
,
2409 struct extent_buffer
*buf
,
2410 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2411 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2412 *root
, struct btrfs_path
*path
, u32 data_size
);
2413 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2414 struct btrfs_root
*root
,
2415 struct btrfs_path
*path
,
2416 u32 new_size
, int from_end
);
2417 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2418 struct btrfs_root
*root
,
2419 struct btrfs_path
*path
,
2420 struct btrfs_key
*new_key
,
2421 unsigned long split_offset
);
2422 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2423 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2425 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*found_path
,
2426 u64 iobjectid
, u64 ioff
, u8 key_type
,
2427 struct btrfs_key
*found_key
);
2428 void btrfs_release_path(struct btrfs_path
*p
);
2429 void add_root_to_dirty_list(struct btrfs_root
*root
);
2430 struct btrfs_path
*btrfs_alloc_path(void);
2431 void btrfs_free_path(struct btrfs_path
*p
);
2432 void btrfs_init_path(struct btrfs_path
*p
);
2433 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2434 struct btrfs_path
*path
, int slot
, int nr
);
2436 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2437 struct btrfs_root
*root
,
2438 struct btrfs_path
*path
)
2440 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2443 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2444 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2445 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2446 struct btrfs_root
*root
,
2447 struct btrfs_path
*path
,
2448 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2450 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2451 struct btrfs_root
*root
,
2452 struct btrfs_path
*path
,
2453 struct btrfs_key
*key
,
2456 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2459 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2460 static inline int btrfs_next_item(struct btrfs_root
*root
,
2461 struct btrfs_path
*p
)
2464 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2465 return btrfs_next_leaf(root
, p
);
2469 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2470 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2471 void btrfs_fixup_low_keys(struct btrfs_root
*root
, struct btrfs_path
*path
,
2472 struct btrfs_disk_key
*key
, int level
);
2473 int btrfs_set_item_key_safe(struct btrfs_root
*root
, struct btrfs_path
*path
,
2474 struct btrfs_key
*new_key
);
2475 void btrfs_set_item_key_unsafe(struct btrfs_root
*root
,
2476 struct btrfs_path
*path
,
2477 struct btrfs_key
*new_key
);
2480 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2481 struct btrfs_root
*tree_root
,
2482 u64 root_id
, u8 type
, u64 ref_id
,
2483 u64 dirid
, u64 sequence
,
2484 const char *name
, int name_len
);
2485 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2486 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2488 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2489 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2491 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2492 btrfs_root_item
*item
, struct btrfs_key
*key
);
2494 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2495 *root
, const char *name
, int name_len
, u64 dir
,
2496 struct btrfs_key
*location
, u8 type
, u64 index
);
2497 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2498 struct btrfs_root
*root
,
2499 struct btrfs_path
*path
, u64 dir
,
2500 const char *name
, int name_len
,
2502 struct btrfs_dir_item
*btrfs_lookup_dir_index(struct btrfs_trans_handle
*trans
,
2503 struct btrfs_root
*root
,
2504 struct btrfs_path
*path
, u64 dir
,
2505 const char *name
, int name_len
,
2506 u64 index
, int mod
);
2507 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2508 struct btrfs_root
*root
,
2509 struct btrfs_path
*path
,
2510 struct btrfs_dir_item
*di
);
2511 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2512 struct btrfs_root
*root
, const char *name
,
2513 u16 name_len
, const void *data
, u16 data_len
,
2516 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2517 struct btrfs_root
*fs_root
,
2518 u64 dirid
, u64
*objectid
);
2521 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2522 struct btrfs_root
*root
,
2523 const char *name
, int name_len
,
2524 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2525 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2526 *root
, u64 objectid
, struct btrfs_inode_item
2528 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2529 *root
, struct btrfs_path
*path
,
2530 struct btrfs_key
*location
, int mod
);
2531 struct btrfs_inode_extref
*btrfs_lookup_inode_extref(struct btrfs_trans_handle
2532 *trans
, struct btrfs_path
*path
, struct btrfs_root
*root
,
2533 u64 ino
, u64 parent_ino
, u64 index
, const char *name
,
2534 int namelen
, int ins_len
);
2535 int btrfs_del_inode_extref(struct btrfs_trans_handle
*trans
,
2536 struct btrfs_root
*root
,
2537 const char *name
, int name_len
,
2538 u64 inode_objectid
, u64 ref_objectid
,
2540 int btrfs_insert_inode_extref(struct btrfs_trans_handle
*trans
,
2541 struct btrfs_root
*root
,
2542 const char *name
, int name_len
,
2543 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2544 struct btrfs_inode_ref
*btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2545 struct btrfs_root
*root
, struct btrfs_path
*path
,
2546 const char *name
, int namelen
, u64 ino
, u64 parent_ino
,
2547 u64 index
, int ins_len
);
2548 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2549 struct btrfs_root
*root
, const char *name
, int name_len
,
2550 u64 ino
, u64 parent_ino
, u64
*index
);
2553 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2554 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2555 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2556 struct btrfs_root
*root
,
2557 u64 objectid
, u64 pos
, u64 offset
,
2560 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
2561 struct btrfs_root
*root
, u64 objectid
,
2562 u64 offset
, char *buffer
, size_t size
);
2563 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
2564 struct btrfs_root
*root
, u64 alloc_end
,
2565 u64 bytenr
, char *data
, size_t len
);
2566 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2567 struct btrfs_root
*root
, struct btrfs_path
*path
,
2571 int btrfs_lookup_uuid_subvol_item(int fd
, const u8
*uuid
, u64
*subvol_id
);
2572 int btrfs_lookup_uuid_received_subvol_item(int fd
, const u8
*uuid
,
2575 static inline int is_fstree(u64 rootid
)
2577 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
2578 (signed long long)rootid
>= (signed long long)BTRFS_FIRST_FREE_OBJECTID
)
2584 int check_dir_conflict(struct btrfs_root
*root
, char *name
, int namelen
,
2585 u64 dir
, u64 index
);
2586 int btrfs_new_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2588 int btrfs_change_inode_flags(struct btrfs_trans_handle
*trans
,
2589 struct btrfs_root
*root
, u64 ino
, u64 flags
);
2590 int btrfs_add_link(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2591 u64 ino
, u64 parent_ino
, char *name
, int namelen
,
2592 u8 type
, u64
*index
, int add_backref
);
2593 int btrfs_unlink(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2594 u64 ino
, u64 parent_ino
, u64 index
, const char *name
,
2595 int namelen
, int add_orphan
);
2596 int btrfs_add_orphan_item(struct btrfs_trans_handle
*trans
,
2597 struct btrfs_root
*root
, struct btrfs_path
*path
,
2599 int btrfs_mkdir(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2600 char *name
, int namelen
, u64 parent_ino
, u64
*ino
, int mode
);
2603 int btrfs_get_extent(struct btrfs_trans_handle
*trans
,
2604 struct btrfs_root
*root
,
2605 struct btrfs_path
*path
,
2606 u64 ino
, u64 offset
, u64 len
, int ins_len
);
2607 int btrfs_punch_hole(struct btrfs_trans_handle
*trans
,
2608 struct btrfs_root
*root
,
2609 u64 ino
, u64 offset
, u64 len
);