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 */
43 #define BTRFS_MAX_MIRRORS 3
45 #define BTRFS_MAX_LEVEL 8
47 #define BTRFS_COMPAT_EXTENT_TREE_V0
49 /* holds pointers to all of the tree roots */
50 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
52 /* stores information about which extents are in use, and reference counts */
53 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
56 * chunk tree stores translations from logical -> physical block numbering
57 * the super block points to the chunk tree
59 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
62 * stores information about which areas of a given device are in use.
63 * one per device. The tree of tree roots points to the device tree
65 #define BTRFS_DEV_TREE_OBJECTID 4ULL
67 /* one per subvolume, storing files and directories */
68 #define BTRFS_FS_TREE_OBJECTID 5ULL
70 /* directory objectid inside the root tree */
71 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
72 /* holds checksums of all the data extents */
73 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
74 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
76 /* for storing items that use the BTRFS_UUID_KEY* */
77 #define BTRFS_UUID_TREE_OBJECTID 9ULL
79 /* tracks free space in block groups. */
80 #define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
82 /* for storing balance parameters in the root tree */
83 #define BTRFS_BALANCE_OBJECTID -4ULL
85 /* oprhan objectid for tracking unlinked/truncated files */
86 #define BTRFS_ORPHAN_OBJECTID -5ULL
88 /* does write ahead logging to speed up fsyncs */
89 #define BTRFS_TREE_LOG_OBJECTID -6ULL
90 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
93 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
94 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
97 * extent checksums all have this objectid
98 * this allows them to share the logging tree
101 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
103 /* For storing free space cache */
104 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
107 * The inode number assigned to the special inode for sotring
110 #define BTRFS_FREE_INO_OBJECTID -12ULL
112 /* dummy objectid represents multiple objectids */
113 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
116 * All files have objectids in this range.
118 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
119 #define BTRFS_LAST_FREE_OBJECTID -256ULL
120 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
125 * the device items go into the chunk tree. The key is in the form
126 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
128 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
131 * the max metadata block size. This limit is somewhat artificial,
132 * but the memmove costs go through the roof for larger blocks.
134 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
137 * we can actually store much bigger names, but lets not confuse the rest
140 #define BTRFS_NAME_LEN 255
143 * Theoretical limit is larger, but we keep this down to a sane
144 * value. That should limit greatly the possibility of collisions on
147 #define BTRFS_LINK_MAX 65535U
149 /* 32 bytes in various csum fields */
150 #define BTRFS_CSUM_SIZE 32
153 #define BTRFS_CSUM_TYPE_CRC32 0
155 static int btrfs_csum_sizes
[] = { 4 };
157 /* four bytes for CRC32 */
158 #define BTRFS_CRC32_SIZE 4
159 #define BTRFS_EMPTY_DIR_SIZE 0
161 #define BTRFS_FT_UNKNOWN 0
162 #define BTRFS_FT_REG_FILE 1
163 #define BTRFS_FT_DIR 2
164 #define BTRFS_FT_CHRDEV 3
165 #define BTRFS_FT_BLKDEV 4
166 #define BTRFS_FT_FIFO 5
167 #define BTRFS_FT_SOCK 6
168 #define BTRFS_FT_SYMLINK 7
169 #define BTRFS_FT_XATTR 8
170 #define BTRFS_FT_MAX 9
172 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
175 * the key defines the order in the tree, and so it also defines (optimal)
176 * block layout. objectid corresonds to the inode number. The flags
177 * tells us things about the object, and is a kind of stream selector.
178 * so for a given inode, keys with flags of 1 might refer to the inode
179 * data, flags of 2 may point to file data in the btree and flags == 3
180 * may point to extents.
182 * offset is the starting byte offset for this key in the stream.
184 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
185 * in cpu native order. Otherwise they are identical and their sizes
186 * should be the same (ie both packed)
188 struct btrfs_disk_key
{
192 } __attribute__ ((__packed__
));
198 } __attribute__ ((__packed__
));
200 struct btrfs_mapping_tree
{
201 struct cache_tree cache_tree
;
204 #define BTRFS_UUID_SIZE 16
205 struct btrfs_dev_item
{
206 /* the internal btrfs device id */
209 /* size of the device */
215 /* optimal io alignment for this device */
218 /* optimal io width for this device */
221 /* minimal io size for this device */
224 /* type and info about this device */
227 /* expected generation for this device */
231 * starting byte of this partition on the device,
232 * to allowr for stripe alignment in the future
236 /* grouping information for allocation decisions */
239 /* seek speed 0-100 where 100 is fastest */
242 /* bandwidth 0-100 where 100 is fastest */
245 /* btrfs generated uuid for this device */
246 u8 uuid
[BTRFS_UUID_SIZE
];
248 /* uuid of FS who owns this device */
249 u8 fsid
[BTRFS_UUID_SIZE
];
250 } __attribute__ ((__packed__
));
252 struct btrfs_stripe
{
255 u8 dev_uuid
[BTRFS_UUID_SIZE
];
256 } __attribute__ ((__packed__
));
259 /* size of this chunk in bytes */
262 /* objectid of the root referencing this chunk */
268 /* optimal io alignment for this chunk */
271 /* optimal io width for this chunk */
274 /* minimal io size for this chunk */
277 /* 2^16 stripes is quite a lot, a second limit is the size of a single
282 /* sub stripes only matter for raid10 */
284 struct btrfs_stripe stripe
;
285 /* additional stripes go here */
286 } __attribute__ ((__packed__
));
288 #define BTRFS_FREE_SPACE_EXTENT 1
289 #define BTRFS_FREE_SPACE_BITMAP 2
291 struct btrfs_free_space_entry
{
295 } __attribute__ ((__packed__
));
297 struct btrfs_free_space_header
{
298 struct btrfs_disk_key location
;
302 } __attribute__ ((__packed__
));
304 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
306 BUG_ON(num_stripes
== 0);
307 return sizeof(struct btrfs_chunk
) +
308 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
311 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
312 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
313 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
314 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
315 #define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
316 #define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
318 #define BTRFS_BACKREF_REV_MAX 256
319 #define BTRFS_BACKREF_REV_SHIFT 56
320 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
321 BTRFS_BACKREF_REV_SHIFT)
323 #define BTRFS_OLD_BACKREF_REV 0
324 #define BTRFS_MIXED_BACKREF_REV 1
327 * every tree block (leaf or node) starts with this header.
329 struct btrfs_header
{
330 /* these first four must match the super block */
331 u8 csum
[BTRFS_CSUM_SIZE
];
332 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
333 __le64 bytenr
; /* which block this node is supposed to live in */
336 /* allowed to be different from the super from here on down */
337 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
342 } __attribute__ ((__packed__
));
344 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
345 sizeof(struct btrfs_header)) / \
346 sizeof(struct btrfs_key_ptr))
347 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
348 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
349 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
350 sizeof(struct btrfs_item) - \
351 sizeof(struct btrfs_file_extent_item))
352 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
353 sizeof(struct btrfs_item) -\
354 sizeof(struct btrfs_dir_item))
358 * this is a very generous portion of the super block, giving us
359 * room to translate 14 chunks with 3 stripes each.
361 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
362 #define BTRFS_LABEL_SIZE 256
365 * just in case we somehow lose the roots and are not able to mount,
366 * we store an array of the roots from previous transactions
369 #define BTRFS_NUM_BACKUP_ROOTS 4
370 struct btrfs_root_backup
{
372 __le64 tree_root_gen
;
375 __le64 chunk_root_gen
;
378 __le64 extent_root_gen
;
387 __le64 csum_root_gen
;
397 u8 extent_root_level
;
401 /* future and to align */
403 } __attribute__ ((__packed__
));
406 * the super block basically lists the main trees of the FS
407 * it currently lacks any block count etc etc
409 struct btrfs_super_block
{
410 u8 csum
[BTRFS_CSUM_SIZE
];
411 /* the first 3 fields must match struct btrfs_header */
412 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
413 __le64 bytenr
; /* this block number */
416 /* allowed to be different from the btrfs_header from here own down */
423 /* this will help find the new super based on the log root */
424 __le64 log_root_transid
;
427 __le64 root_dir_objectid
;
431 /* Unused and must be equal to nodesize */
434 __le32 sys_chunk_array_size
;
435 __le64 chunk_root_generation
;
437 __le64 compat_ro_flags
;
438 __le64 incompat_flags
;
443 struct btrfs_dev_item dev_item
;
445 char label
[BTRFS_LABEL_SIZE
];
447 __le64 cache_generation
;
448 __le64 uuid_tree_generation
;
450 /* future expansion */
452 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
453 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
454 } __attribute__ ((__packed__
));
457 * Compat flags that we support. If any incompat flags are set other than the
458 * ones specified below then we will fail to mount
460 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
462 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
463 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
464 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
465 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
468 * some patches floated around with a second compression method
469 * lets save that incompat here for when they do get in
470 * Note we don't actually support it, we're just reserving the
473 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
476 * older kernels tried to do bigger metadata blocks, but the
477 * code was pretty buggy. Lets not let them try anymore.
479 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
480 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
481 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
482 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
483 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
485 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
487 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
488 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
490 #define BTRFS_FEATURE_INCOMPAT_SUPP \
491 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
492 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
493 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
494 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
495 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
496 BTRFS_FEATURE_INCOMPAT_RAID56 | \
497 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
498 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
499 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
502 * A leaf is full of items. offset and size tell us where to find
503 * the item in the leaf (relative to the start of the data area)
506 struct btrfs_disk_key key
;
509 } __attribute__ ((__packed__
));
512 * leaves have an item area and a data area:
513 * [item0, item1....itemN] [free space] [dataN...data1, data0]
515 * The data is separate from the items to get the keys closer together
519 struct btrfs_header header
;
520 struct btrfs_item items
[];
521 } __attribute__ ((__packed__
));
524 * all non-leaf blocks are nodes, they hold only keys and pointers to
527 struct btrfs_key_ptr
{
528 struct btrfs_disk_key key
;
531 } __attribute__ ((__packed__
));
534 struct btrfs_header header
;
535 struct btrfs_key_ptr ptrs
[];
536 } __attribute__ ((__packed__
));
539 * btrfs_paths remember the path taken from the root down to the leaf.
540 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
541 * to any other levels that are present.
543 * The slots array records the index of the item or block pointer
544 * used while walking the tree.
548 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
549 int slots
[BTRFS_MAX_LEVEL
];
550 /* if there is real range locking, this locks field will change */
551 int locks
[BTRFS_MAX_LEVEL
];
553 /* keep some upper locks as we walk down */
557 * set by btrfs_split_item, tells search_slot to keep all locks
558 * and to force calls to keep space in the nodes
560 unsigned int search_for_split
:1;
561 unsigned int skip_check_block
:1;
565 * items in the extent btree are used to record the objectid of the
566 * owner of the block and the number of references
569 struct btrfs_extent_item
{
573 } __attribute__ ((__packed__
));
575 struct btrfs_extent_item_v0
{
577 } __attribute__ ((__packed__
));
579 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
580 sizeof(struct btrfs_item))
582 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
583 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
585 /* following flags only apply to tree blocks */
587 /* use full backrefs for extent pointers in the block*/
588 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
590 struct btrfs_tree_block_info
{
591 struct btrfs_disk_key key
;
593 } __attribute__ ((__packed__
));
595 struct btrfs_extent_data_ref
{
600 } __attribute__ ((__packed__
));
602 struct btrfs_shared_data_ref
{
604 } __attribute__ ((__packed__
));
606 struct btrfs_extent_inline_ref
{
609 } __attribute__ ((__packed__
));
611 struct btrfs_extent_ref_v0
{
616 } __attribute__ ((__packed__
));
618 /* dev extents record free space on individual devices. The owner
619 * field points back to the chunk allocation mapping tree that allocated
620 * the extent. The chunk tree uuid field is a way to double check the owner
622 struct btrfs_dev_extent
{
624 __le64 chunk_objectid
;
627 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
628 } __attribute__ ((__packed__
));
630 struct btrfs_inode_ref
{
634 } __attribute__ ((__packed__
));
636 struct btrfs_inode_extref
{
637 __le64 parent_objectid
;
640 __u8 name
[0]; /* name goes here */
641 } __attribute__ ((__packed__
));
643 struct btrfs_timespec
{
646 } __attribute__ ((__packed__
));
649 BTRFS_COMPRESS_NONE
= 0,
650 BTRFS_COMPRESS_ZLIB
= 1,
651 BTRFS_COMPRESS_LZO
= 2,
652 BTRFS_COMPRESS_TYPES
= 2,
653 BTRFS_COMPRESS_LAST
= 3,
654 } btrfs_compression_type
;
656 /* we don't understand any encryption methods right now */
658 BTRFS_ENCRYPTION_NONE
= 0,
659 BTRFS_ENCRYPTION_LAST
= 1,
660 } btrfs_encryption_type
;
662 enum btrfs_tree_block_status
{
663 BTRFS_TREE_BLOCK_CLEAN
,
664 BTRFS_TREE_BLOCK_INVALID_NRITEMS
,
665 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY
,
666 BTRFS_TREE_BLOCK_BAD_KEY_ORDER
,
667 BTRFS_TREE_BLOCK_INVALID_LEVEL
,
668 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE
,
669 BTRFS_TREE_BLOCK_INVALID_OFFSETS
,
672 struct btrfs_inode_item
{
673 /* nfs style generation number */
675 /* transid that last touched this inode */
687 /* modification sequence number for NFS */
691 * a little future expansion, for more than this we can
692 * just grow the inode item and version it
695 struct btrfs_timespec atime
;
696 struct btrfs_timespec ctime
;
697 struct btrfs_timespec mtime
;
698 struct btrfs_timespec otime
;
699 } __attribute__ ((__packed__
));
701 struct btrfs_dir_log_item
{
703 } __attribute__ ((__packed__
));
705 struct btrfs_dir_item
{
706 struct btrfs_disk_key location
;
711 } __attribute__ ((__packed__
));
713 struct btrfs_root_item_v0
{
714 struct btrfs_inode_item inode
;
720 __le64 last_snapshot
;
723 struct btrfs_disk_key drop_progress
;
726 } __attribute__ ((__packed__
));
728 struct btrfs_root_item
{
729 struct btrfs_inode_item inode
;
735 __le64 last_snapshot
;
738 struct btrfs_disk_key drop_progress
;
743 * The following fields appear after subvol_uuids+subvol_times
748 * This generation number is used to test if the new fields are valid
749 * and up to date while reading the root item. Everytime the root item
750 * is written out, the "generation" field is copied into this field. If
751 * anyone ever mounted the fs with an older kernel, we will have
752 * mismatching generation values here and thus must invalidate the
753 * new fields. See btrfs_update_root and btrfs_find_last_root for
755 * the offset of generation_v2 is also used as the start for the memset
756 * when invalidating the fields.
758 __le64 generation_v2
;
759 u8 uuid
[BTRFS_UUID_SIZE
];
760 u8 parent_uuid
[BTRFS_UUID_SIZE
];
761 u8 received_uuid
[BTRFS_UUID_SIZE
];
762 __le64 ctransid
; /* updated when an inode changes */
763 __le64 otransid
; /* trans when created */
764 __le64 stransid
; /* trans when sent. non-zero for received subvol */
765 __le64 rtransid
; /* trans when received. non-zero for received subvol */
766 struct btrfs_timespec ctime
;
767 struct btrfs_timespec otime
;
768 struct btrfs_timespec stime
;
769 struct btrfs_timespec rtime
;
770 __le64 reserved
[8]; /* for future */
771 } __attribute__ ((__packed__
));
774 * this is used for both forward and backward root refs
776 struct btrfs_root_ref
{
780 } __attribute__ ((__packed__
));
782 #define BTRFS_FILE_EXTENT_INLINE 0
783 #define BTRFS_FILE_EXTENT_REG 1
784 #define BTRFS_FILE_EXTENT_PREALLOC 2
786 struct btrfs_file_extent_item
{
788 * transaction id that created this extent
792 * max number of bytes to hold this extent in ram
793 * when we split a compressed extent we can't know how big
794 * each of the resulting pieces will be. So, this is
795 * an upper limit on the size of the extent in ram instead of
801 * 32 bits for the various ways we might encode the data,
802 * including compression and encryption. If any of these
803 * are set to something a given disk format doesn't understand
804 * it is treated like an incompat flag for reading and writing,
809 __le16 other_encoding
; /* spare for later use */
811 /* are we inline data or a real extent? */
815 * disk space consumed by the extent, checksum blocks are included
819 __le64 disk_num_bytes
;
821 * the logical offset in file blocks (no csums)
822 * this extent record is for. This allows a file extent to point
823 * into the middle of an existing extent on disk, sharing it
824 * between two snapshots (useful if some bytes in the middle of the
825 * extent have changed
829 * the logical number of file blocks (no csums included)
833 } __attribute__ ((__packed__
));
835 struct btrfs_csum_item
{
837 } __attribute__ ((__packed__
));
840 * We don't want to overwrite 1M at the beginning of device, even though
841 * there is our 1st superblock at 64k. Some possible reasons:
842 * - the first 64k blank is useful for some boot loader/manager
843 * - the first 1M could be scratched by buggy partitioner or somesuch
845 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
847 /* tag for the radix tree of block groups in ram */
848 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
849 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
850 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
851 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
852 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
853 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
854 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
855 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
856 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
857 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
858 #define BTRFS_NR_RAID_TYPES 7
860 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
861 BTRFS_BLOCK_GROUP_SYSTEM | \
862 BTRFS_BLOCK_GROUP_METADATA)
864 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
865 BTRFS_BLOCK_GROUP_RAID1 | \
866 BTRFS_BLOCK_GROUP_RAID5 | \
867 BTRFS_BLOCK_GROUP_RAID6 | \
868 BTRFS_BLOCK_GROUP_DUP | \
869 BTRFS_BLOCK_GROUP_RAID10)
871 /* used in struct btrfs_balance_args fields */
872 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
875 * GLOBAL_RSV does not exist as a on-disk block group type and is used
876 * internally for exporting info about global block reserve from space infos
878 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
880 #define BTRFS_QGROUP_LEVEL_SHIFT 48
882 static inline u64
btrfs_qgroup_level(u64 qgroupid
)
884 return qgroupid
>> BTRFS_QGROUP_LEVEL_SHIFT
;
887 static inline u64
btrfs_qgroup_subvid(u64 qgroupid
)
889 return qgroupid
& ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT
) - 1);
892 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
893 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
894 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
896 struct btrfs_qgroup_status_item
{
900 __le64 scan
; /* progress during scanning */
901 } __attribute__ ((__packed__
));
903 struct btrfs_block_group_item
{
905 __le64 chunk_objectid
;
907 } __attribute__ ((__packed__
));
909 struct btrfs_free_space_info
{
912 } __attribute__ ((__packed__
));
914 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
916 struct btrfs_qgroup_info_item
{
919 __le64 referenced_compressed
;
921 __le64 exclusive_compressed
;
922 } __attribute__ ((__packed__
));
924 /* flags definition for qgroup limits */
925 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
926 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
927 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
928 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
929 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
930 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
932 struct btrfs_qgroup_limit_item
{
934 __le64 max_referenced
;
935 __le64 max_exclusive
;
936 __le64 rsv_referenced
;
937 __le64 rsv_exclusive
;
938 } __attribute__ ((__packed__
));
940 struct btrfs_space_info
{
946 struct list_head list
;
949 struct btrfs_block_group_cache
{
950 struct cache_extent cache
;
951 struct btrfs_key key
;
952 struct btrfs_block_group_item item
;
953 struct btrfs_space_info
*space_info
;
954 struct btrfs_free_space_ctl
*free_space_ctl
;
962 struct btrfs_extent_ops
{
963 int (*alloc_extent
)(struct btrfs_root
*root
, u64 num_bytes
,
964 u64 hint_byte
, struct btrfs_key
*ins
, int metadata
);
965 int (*free_extent
)(struct btrfs_root
*root
, u64 bytenr
,
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 btrfs_extent_ops
*extent_ops
;
1020 struct list_head dirty_cowonly_roots
;
1021 struct list_head recow_ebs
;
1023 struct btrfs_fs_devices
*fs_devices
;
1024 struct list_head space_info
;
1027 unsigned int readonly
:1;
1028 unsigned int on_restoring
:1;
1029 unsigned int is_chunk_recover
:1;
1030 unsigned int quota_enabled
:1;
1031 unsigned int suppress_check_block_errors
:1;
1032 unsigned int ignore_fsid_mismatch
:1;
1033 unsigned int ignore_chunk_tree_error
:1;
1035 int (*free_extent_hook
)(struct btrfs_trans_handle
*trans
,
1036 struct btrfs_root
*root
,
1037 u64 bytenr
, u64 num_bytes
, u64 parent
,
1038 u64 root_objectid
, u64 owner
, u64 offset
,
1040 struct cache_tree
*fsck_extent_cache
;
1041 struct cache_tree
*corrupt_blocks
;
1046 * in ram representation of the tree. extent_root is used for all allocations
1047 * and for the extent tree extent_root root.
1050 struct extent_buffer
*node
;
1051 struct extent_buffer
*commit_root
;
1052 struct btrfs_root_item root_item
;
1053 struct btrfs_key root_key
;
1054 struct btrfs_fs_info
*fs_info
;
1058 /* data allocations are done in sectorsize units */
1061 /* node allocations are done in nodesize units */
1064 /* Unused, equal to nodesize */
1067 /* leaf allocations are done in nodesize units */
1076 u64 last_inode_alloc
;
1079 * Record orphan data extent ref
1081 * TODO: Don't restore things in btrfs_root.
1082 * Directly record it into inode_record, which needs a lot of
1083 * infrastructure change to allow cooperation between extent
1086 struct list_head orphan_data_extents
;
1088 /* the dirty list is only used by non-reference counted roots */
1089 struct list_head dirty_list
;
1090 struct rb_node rb_node
;
1094 * inode items have the data typically returned from stat and store other
1095 * info about object characteristics. There is one for every file and dir in
1098 #define BTRFS_INODE_ITEM_KEY 1
1099 #define BTRFS_INODE_REF_KEY 12
1100 #define BTRFS_INODE_EXTREF_KEY 13
1101 #define BTRFS_XATTR_ITEM_KEY 24
1102 #define BTRFS_ORPHAN_ITEM_KEY 48
1104 #define BTRFS_DIR_LOG_ITEM_KEY 60
1105 #define BTRFS_DIR_LOG_INDEX_KEY 72
1107 * dir items are the name -> inode pointers in a directory. There is one
1108 * for every name in a directory.
1110 #define BTRFS_DIR_ITEM_KEY 84
1111 #define BTRFS_DIR_INDEX_KEY 96
1114 * extent data is for file data
1116 #define BTRFS_EXTENT_DATA_KEY 108
1119 * csum items have the checksums for data in the extents
1121 #define BTRFS_CSUM_ITEM_KEY 120
1123 * extent csums are stored in a separate tree and hold csums for
1124 * an entire extent on disk.
1126 #define BTRFS_EXTENT_CSUM_KEY 128
1129 * root items point to tree roots. There are typically in the root
1130 * tree used by the super block to find all the other trees
1132 #define BTRFS_ROOT_ITEM_KEY 132
1135 * root backrefs tie subvols and snapshots to the directory entries that
1138 #define BTRFS_ROOT_BACKREF_KEY 144
1141 * root refs make a fast index for listing all of the snapshots and
1142 * subvolumes referenced by a given root. They point directly to the
1143 * directory item in the root that references the subvol
1145 #define BTRFS_ROOT_REF_KEY 156
1148 * extent items are in the extent map tree. These record which blocks
1149 * are used, and how many references there are to each block
1151 #define BTRFS_EXTENT_ITEM_KEY 168
1154 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1155 * the length, so we save the level in key->offset instead of the length.
1157 #define BTRFS_METADATA_ITEM_KEY 169
1159 #define BTRFS_TREE_BLOCK_REF_KEY 176
1161 #define BTRFS_EXTENT_DATA_REF_KEY 178
1163 /* old style extent backrefs */
1164 #define BTRFS_EXTENT_REF_V0_KEY 180
1166 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1168 #define BTRFS_SHARED_DATA_REF_KEY 184
1172 * block groups give us hints into the extent allocation trees. Which
1173 * blocks are free etc etc
1175 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1178 * Every block group is represented in the free space tree by a free space info
1179 * item, which stores some accounting information. It is keyed on
1180 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1182 #define BTRFS_FREE_SPACE_INFO_KEY 198
1185 * A free space extent tracks an extent of space that is free in a block group.
1186 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1188 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1191 * When a block group becomes very fragmented, we convert it to use bitmaps
1192 * instead of extents. A free space bitmap is keyed on
1193 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1194 * (length / sectorsize) bits.
1196 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1198 #define BTRFS_DEV_EXTENT_KEY 204
1199 #define BTRFS_DEV_ITEM_KEY 216
1200 #define BTRFS_CHUNK_ITEM_KEY 228
1202 #define BTRFS_BALANCE_ITEM_KEY 248
1207 #define BTRFS_QGROUP_STATUS_KEY 240
1208 #define BTRFS_QGROUP_INFO_KEY 242
1209 #define BTRFS_QGROUP_LIMIT_KEY 244
1210 #define BTRFS_QGROUP_RELATION_KEY 246
1213 * Persistently stores the io stats in the device tree.
1214 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1216 #define BTRFS_DEV_STATS_KEY 249
1219 * Persistently stores the device replace state in the device tree.
1220 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1222 #define BTRFS_DEV_REPLACE_KEY 250
1225 * Stores items that allow to quickly map UUIDs to something else.
1226 * These items are part of the filesystem UUID tree.
1227 * The key is built like this:
1228 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1230 #if BTRFS_UUID_SIZE != 16
1231 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1233 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1234 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1235 * received subvols */
1238 * string items are for debugging. They just store a short string of
1241 #define BTRFS_STRING_ITEM_KEY 253
1245 #define BTRFS_INODE_NODATASUM (1 << 0)
1246 #define BTRFS_INODE_NODATACOW (1 << 1)
1247 #define BTRFS_INODE_READONLY (1 << 2)
1249 #define read_eb_member(eb, ptr, type, member, result) ( \
1250 read_extent_buffer(eb, (char *)(result), \
1251 ((unsigned long)(ptr)) + \
1252 offsetof(type, member), \
1253 sizeof(((type *)0)->member)))
1255 #define write_eb_member(eb, ptr, type, member, result) ( \
1256 write_extent_buffer(eb, (char *)(result), \
1257 ((unsigned long)(ptr)) + \
1258 offsetof(type, member), \
1259 sizeof(((type *)0)->member)))
1261 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1262 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1264 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1265 return le##bits##_to_cpu(h->member); \
1267 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1270 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1271 h->member = cpu_to_le##bits(val); \
1274 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1275 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1278 unsigned long offset = (unsigned long)s; \
1279 const type *p = (type *) (eb->data + offset); \
1280 return get_unaligned_le##bits(&p->member); \
1282 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1283 type *s, u##bits val) \
1285 unsigned long offset = (unsigned long)s; \
1286 type *p = (type *) (eb->data + offset); \
1287 put_unaligned_le##bits(val, &p->member); \
1290 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1291 static inline u##bits btrfs_##name(const type *s) \
1293 return le##bits##_to_cpu(s->member); \
1295 static inline void btrfs_set_##name(type *s, u##bits val) \
1297 s->member = cpu_to_le##bits(val); \
1300 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1301 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1302 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1303 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1304 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1305 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1307 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1308 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1309 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1310 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1311 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1312 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1314 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1315 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1317 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1319 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1321 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1323 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1325 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1326 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1328 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1330 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1332 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1335 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1337 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1340 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1342 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1345 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1346 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1347 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1348 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1349 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1350 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1351 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1352 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1353 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1354 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1355 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1357 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1359 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1362 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1363 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1364 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1366 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1368 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1370 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1372 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1373 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1375 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1377 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1378 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1380 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1383 unsigned long offset
= (unsigned long)c
;
1384 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1385 offset
+= nr
* sizeof(struct btrfs_stripe
);
1386 return (struct btrfs_stripe
*)offset
;
1389 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1391 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1394 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1395 struct btrfs_chunk
*c
, int nr
)
1397 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1400 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1401 struct btrfs_chunk
*c
, int nr
,
1404 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1407 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1408 struct btrfs_chunk
*c
, int nr
)
1410 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1413 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1414 struct btrfs_chunk
*c
, int nr
,
1417 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1420 /* struct btrfs_block_group_item */
1421 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1423 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1425 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1426 struct btrfs_block_group_item
, chunk_objectid
, 64);
1428 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1429 struct btrfs_block_group_item
, chunk_objectid
, 64);
1430 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1431 struct btrfs_block_group_item
, flags
, 64);
1432 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1433 struct btrfs_block_group_item
, flags
, 64);
1435 /* struct btrfs_free_space_info */
1436 BTRFS_SETGET_FUNCS(free_space_extent_count
, struct btrfs_free_space_info
,
1438 BTRFS_SETGET_FUNCS(free_space_flags
, struct btrfs_free_space_info
, flags
, 32);
1440 /* struct btrfs_inode_ref */
1441 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1442 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1443 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1445 /* struct btrfs_inode_extref */
1446 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1447 parent_objectid
, 64);
1448 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1450 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1452 /* struct btrfs_inode_item */
1453 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1454 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1455 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1456 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1457 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1458 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1459 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1460 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1461 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1462 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1463 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1464 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1466 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
1467 struct btrfs_inode_item
, generation
, 64);
1468 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
,
1469 struct btrfs_inode_item
, sequence
, 64);
1470 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
,
1471 struct btrfs_inode_item
, transid
, 64);
1472 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
1473 struct btrfs_inode_item
, size
, 64);
1474 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
,
1475 struct btrfs_inode_item
, nbytes
, 64);
1476 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
1477 struct btrfs_inode_item
, block_group
, 64);
1478 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
1479 struct btrfs_inode_item
, nlink
, 32);
1480 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
1481 struct btrfs_inode_item
, uid
, 32);
1482 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
1483 struct btrfs_inode_item
, gid
, 32);
1484 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
1485 struct btrfs_inode_item
, mode
, 32);
1486 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
1487 struct btrfs_inode_item
, rdev
, 64);
1488 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
1489 struct btrfs_inode_item
, flags
, 64);
1491 static inline struct btrfs_timespec
*
1492 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1494 unsigned long ptr
= (unsigned long)inode_item
;
1495 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1496 return (struct btrfs_timespec
*)ptr
;
1499 static inline struct btrfs_timespec
*
1500 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1502 unsigned long ptr
= (unsigned long)inode_item
;
1503 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1504 return (struct btrfs_timespec
*)ptr
;
1507 static inline struct btrfs_timespec
*
1508 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1510 unsigned long ptr
= (unsigned long)inode_item
;
1511 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1512 return (struct btrfs_timespec
*)ptr
;
1515 static inline struct btrfs_timespec
*
1516 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1518 unsigned long ptr
= (unsigned long)inode_item
;
1519 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1520 return (struct btrfs_timespec
*)ptr
;
1523 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1524 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1525 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
1527 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
1530 /* struct btrfs_dev_extent */
1531 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1533 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1534 chunk_objectid
, 64);
1535 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1537 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1539 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length
, struct btrfs_dev_extent
,
1542 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1544 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1545 return (u8
*)((unsigned long)dev
+ ptr
);
1549 /* struct btrfs_extent_item */
1550 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1551 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
, refs
, 64);
1552 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1554 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1555 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags
, struct btrfs_extent_item
, flags
, 64);
1557 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1559 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1561 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1562 struct btrfs_tree_block_info
*item
,
1563 struct btrfs_disk_key
*key
)
1565 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1568 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1569 struct btrfs_tree_block_info
*item
,
1570 struct btrfs_disk_key
*key
)
1572 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1575 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1577 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1579 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1581 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1584 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1587 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1589 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1591 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type
,
1592 struct btrfs_extent_inline_ref
, type
, 8);
1593 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset
,
1594 struct btrfs_extent_inline_ref
, offset
, 64);
1596 static inline u32
btrfs_extent_inline_ref_size(int type
)
1598 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1599 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1600 return sizeof(struct btrfs_extent_inline_ref
);
1601 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1602 return sizeof(struct btrfs_shared_data_ref
) +
1603 sizeof(struct btrfs_extent_inline_ref
);
1604 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1605 return sizeof(struct btrfs_extent_data_ref
) +
1606 offsetof(struct btrfs_extent_inline_ref
, offset
);
1611 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1612 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1614 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1615 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1617 /* struct btrfs_node */
1618 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1619 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1621 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1624 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1625 sizeof(struct btrfs_key_ptr
) * nr
;
1626 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1629 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1633 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1634 sizeof(struct btrfs_key_ptr
) * nr
;
1635 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1638 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1641 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1642 sizeof(struct btrfs_key_ptr
) * nr
;
1643 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1646 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1650 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1651 sizeof(struct btrfs_key_ptr
) * nr
;
1652 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1655 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1657 return offsetof(struct btrfs_node
, ptrs
) +
1658 sizeof(struct btrfs_key_ptr
) * nr
;
1661 static inline void btrfs_node_key(struct extent_buffer
*eb
,
1662 struct btrfs_disk_key
*disk_key
, int nr
)
1665 ptr
= btrfs_node_key_ptr_offset(nr
);
1666 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1667 struct btrfs_key_ptr
, key
, disk_key
);
1670 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1671 struct btrfs_disk_key
*disk_key
, int nr
)
1674 ptr
= btrfs_node_key_ptr_offset(nr
);
1675 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1676 struct btrfs_key_ptr
, key
, disk_key
);
1679 /* struct btrfs_item */
1680 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1681 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1683 static inline unsigned long btrfs_item_nr_offset(int nr
)
1685 return offsetof(struct btrfs_leaf
, items
) +
1686 sizeof(struct btrfs_item
) * nr
;
1689 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1691 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1694 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1695 struct btrfs_item
*item
)
1697 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1700 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1702 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
1705 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1707 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
1710 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1712 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
1715 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1716 struct btrfs_disk_key
*disk_key
, int nr
)
1718 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1719 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1722 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1723 struct btrfs_disk_key
*disk_key
, int nr
)
1725 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1726 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1729 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1732 * struct btrfs_root_ref
1734 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1735 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1736 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1738 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1739 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1740 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1742 /* struct btrfs_dir_item */
1743 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1744 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1745 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1746 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1748 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1750 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1751 struct btrfs_dir_item
*item
,
1752 struct btrfs_disk_key
*key
)
1754 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1757 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1758 struct btrfs_dir_item
*item
,
1759 struct btrfs_disk_key
*key
)
1761 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1764 /* struct btrfs_free_space_header */
1765 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1767 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1769 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1772 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1773 struct btrfs_free_space_header
*h
,
1774 struct btrfs_disk_key
*key
)
1776 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1779 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1780 struct btrfs_free_space_header
*h
,
1781 struct btrfs_disk_key
*key
)
1783 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1786 /* struct btrfs_disk_key */
1787 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1789 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1790 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1792 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1793 struct btrfs_disk_key
*disk
)
1795 cpu
->offset
= le64_to_cpu(disk
->offset
);
1796 cpu
->type
= disk
->type
;
1797 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1800 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1801 struct btrfs_key
*cpu
)
1803 disk
->offset
= cpu_to_le64(cpu
->offset
);
1804 disk
->type
= cpu
->type
;
1805 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1808 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1809 struct btrfs_key
*key
, int nr
)
1811 struct btrfs_disk_key disk_key
;
1812 btrfs_node_key(eb
, &disk_key
, nr
);
1813 btrfs_disk_key_to_cpu(key
, &disk_key
);
1816 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1817 struct btrfs_key
*key
, int nr
)
1819 struct btrfs_disk_key disk_key
;
1820 btrfs_item_key(eb
, &disk_key
, nr
);
1821 btrfs_disk_key_to_cpu(key
, &disk_key
);
1824 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1825 struct btrfs_dir_item
*item
,
1826 struct btrfs_key
*key
)
1828 struct btrfs_disk_key disk_key
;
1829 btrfs_dir_item_key(eb
, item
, &disk_key
);
1830 btrfs_disk_key_to_cpu(key
, &disk_key
);
1834 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1839 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1844 /* struct btrfs_header */
1845 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1846 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1848 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1849 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1850 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1851 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1852 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
1853 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
, nritems
,
1855 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
1856 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
1859 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1861 return (btrfs_header_flags(eb
) & flag
) == flag
;
1864 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1866 u64 flags
= btrfs_header_flags(eb
);
1867 btrfs_set_header_flags(eb
, flags
| flag
);
1868 return (flags
& flag
) == flag
;
1871 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1873 u64 flags
= btrfs_header_flags(eb
);
1874 btrfs_set_header_flags(eb
, flags
& ~flag
);
1875 return (flags
& flag
) == flag
;
1878 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1880 u64 flags
= btrfs_header_flags(eb
);
1881 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1884 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1887 u64 flags
= btrfs_header_flags(eb
);
1888 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1889 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1890 btrfs_set_header_flags(eb
, flags
);
1893 static inline unsigned long btrfs_header_fsid(void)
1895 return offsetof(struct btrfs_header
, fsid
);
1898 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1900 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
1903 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1905 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1909 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1911 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1915 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1920 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1925 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1930 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1932 return (btrfs_header_level(eb
) == 0);
1935 /* struct btrfs_root_item */
1936 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1938 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1939 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1940 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1942 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1944 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1945 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1946 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1947 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1948 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1949 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1950 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1951 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1953 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
1955 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
1957 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
1959 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
1961 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
1964 /* struct btrfs_root_backup */
1965 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
1967 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
1969 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
1970 tree_root_level
, 8);
1972 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
1974 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
1975 chunk_root_gen
, 64);
1976 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
1977 chunk_root_level
, 8);
1979 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
1981 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
1982 extent_root_gen
, 64);
1983 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
1984 extent_root_level
, 8);
1986 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
1988 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
1990 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
1993 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
1995 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
1997 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2000 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2002 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2004 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2005 csum_root_level
, 8);
2006 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2008 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2010 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2013 /* struct btrfs_super_block */
2015 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2016 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2017 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2019 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2020 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2021 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2022 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2023 struct btrfs_super_block
, chunk_root_generation
, 64);
2024 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2026 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2028 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2029 chunk_root_level
, 8);
2030 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2032 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2033 log_root_transid
, 64);
2034 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2036 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2038 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2040 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2042 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2044 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2046 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2048 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2049 root_dir_objectid
, 64);
2050 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2052 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2054 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2055 compat_ro_flags
, 64);
2056 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2057 incompat_flags
, 64);
2058 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2060 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2061 cache_generation
, 64);
2062 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2063 uuid_tree_generation
, 64);
2064 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2066 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2068 int t
= btrfs_super_csum_type(s
);
2069 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2070 return btrfs_csum_sizes
[t
];
2073 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2075 return offsetof(struct btrfs_leaf
, items
);
2078 /* struct btrfs_file_extent_item */
2079 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2080 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2082 static inline unsigned long btrfs_file_extent_inline_start(struct
2083 btrfs_file_extent_item
*e
)
2085 unsigned long offset
= (unsigned long)e
;
2086 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2090 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2092 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2095 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2097 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2099 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2101 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
, struct btrfs_file_extent_item
,
2103 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2104 disk_num_bytes
, 64);
2105 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2107 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
, struct btrfs_file_extent_item
,
2109 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2111 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
, struct btrfs_file_extent_item
,
2113 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2115 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2117 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2119 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
, struct btrfs_file_extent_item
,
2121 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2123 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2124 other_encoding
, 16);
2126 /* btrfs_qgroup_status_item */
2127 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2129 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2131 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2133 BTRFS_SETGET_FUNCS(qgroup_status_scan
, struct btrfs_qgroup_status_item
,
2136 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version
,
2137 struct btrfs_qgroup_status_item
, version
, 64);
2138 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation
,
2139 struct btrfs_qgroup_status_item
, generation
, 64);
2140 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags
,
2141 struct btrfs_qgroup_status_item
, flags
, 64);
2142 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_scan
,
2143 struct btrfs_qgroup_status_item
, scan
, 64);
2145 /* btrfs_qgroup_info_item */
2146 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2148 BTRFS_SETGET_FUNCS(qgroup_info_referenced
, struct btrfs_qgroup_info_item
,
2150 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed
,
2151 struct btrfs_qgroup_info_item
, referenced_compressed
, 64);
2152 BTRFS_SETGET_FUNCS(qgroup_info_exclusive
, struct btrfs_qgroup_info_item
,
2154 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed
,
2155 struct btrfs_qgroup_info_item
, exclusive_compressed
, 64);
2157 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2158 struct btrfs_qgroup_info_item
, generation
, 64);
2159 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced
,
2160 struct btrfs_qgroup_info_item
, referenced
, 64);
2161 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed
,
2162 struct btrfs_qgroup_info_item
, referenced_compressed
, 64);
2163 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive
,
2164 struct btrfs_qgroup_info_item
, exclusive
, 64);
2165 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed
,
2166 struct btrfs_qgroup_info_item
, exclusive_compressed
, 64);
2168 /* btrfs_qgroup_limit_item */
2169 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2171 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced
, struct btrfs_qgroup_limit_item
,
2172 max_referenced
, 64);
2173 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive
, struct btrfs_qgroup_limit_item
,
2175 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced
, struct btrfs_qgroup_limit_item
,
2176 rsv_referenced
, 64);
2177 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive
, struct btrfs_qgroup_limit_item
,
2180 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags
,
2181 struct btrfs_qgroup_limit_item
, flags
, 64);
2182 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced
,
2183 struct btrfs_qgroup_limit_item
, max_referenced
, 64);
2184 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive
,
2185 struct btrfs_qgroup_limit_item
, max_exclusive
, 64);
2186 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced
,
2187 struct btrfs_qgroup_limit_item
, rsv_referenced
, 64);
2188 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive
,
2189 struct btrfs_qgroup_limit_item
, rsv_exclusive
, 64);
2192 * this returns the number of bytes used by the item on disk, minus the
2193 * size of any extent headers. If a file is compressed on disk, this is
2194 * the compressed size
2196 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2197 struct btrfs_item
*e
)
2199 unsigned long offset
;
2200 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2201 return btrfs_item_size(eb
, e
) - offset
;
2204 /* this returns the number of file bytes represented by the inline item.
2205 * If an item is compressed, this is the uncompressed size
2207 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2209 struct btrfs_file_extent_item
*fi
)
2212 * return the space used on disk if this item isn't
2213 * compressed or encoded
2215 if (btrfs_file_extent_compression(eb
, fi
) == 0 &&
2216 btrfs_file_extent_encryption(eb
, fi
) == 0 &&
2217 btrfs_file_extent_other_encoding(eb
, fi
) == 0) {
2218 return btrfs_file_extent_inline_item_len(eb
,
2219 btrfs_item_nr(slot
));
2222 /* otherwise use the ram bytes field */
2223 return btrfs_file_extent_ram_bytes(eb
, fi
);
2227 * NOTE: Backward compatibility, do not use.
2228 * Replacement: read nodesize directly
2230 __attribute__((deprecated
))
2231 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
2233 return root
->leafsize
;
2234 return root
->nodesize
;
2237 static inline int btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
2239 struct btrfs_super_block
*disk_super
;
2240 disk_super
= fs_info
->super_copy
;
2241 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
2244 static inline int btrfs_fs_compat_ro(struct btrfs_fs_info
*fs_info
, u64 flag
)
2246 struct btrfs_super_block
*disk_super
;
2247 disk_super
= fs_info
->super_copy
;
2248 return !!(btrfs_super_compat_ro_flags(disk_super
) & flag
);
2251 /* helper function to cast into the data area of the leaf. */
2252 #define btrfs_item_ptr(leaf, slot, type) \
2253 ((type *)(btrfs_leaf_data(leaf) + \
2254 btrfs_item_offset_nr(leaf, slot)))
2256 #define btrfs_item_ptr_offset(leaf, slot) \
2257 ((unsigned long)(btrfs_leaf_data(leaf) + \
2258 btrfs_item_offset_nr(leaf, slot)))
2261 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2262 struct btrfs_root
*root
,
2263 u64 num_bytes
, u64 empty_size
,
2264 u64 hint_byte
, u64 search_end
,
2265 struct btrfs_key
*ins
, int data
);
2266 int btrfs_fix_block_accounting(struct btrfs_trans_handle
*trans
,
2267 struct btrfs_root
*root
);
2268 void btrfs_pin_extent(struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 num_bytes
);
2269 void btrfs_unpin_extent(struct btrfs_fs_info
*fs_info
,
2270 u64 bytenr
, u64 num_bytes
);
2271 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
2272 struct btrfs_root
*root
);
2273 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
2274 btrfs_fs_info
*info
,
2276 struct btrfs_block_group_cache
*btrfs_lookup_first_block_group(struct
2277 btrfs_fs_info
*info
,
2279 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2280 struct btrfs_root
*root
,
2281 u32 blocksize
, u64 root_objectid
,
2282 struct btrfs_disk_key
*key
, int level
,
2283 u64 hint
, u64 empty_size
);
2284 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
2285 struct btrfs_root
*root
,
2286 u64 num_bytes
, u64 parent
,
2287 u64 root_objectid
, u64 ref_generation
,
2288 u64 owner
, u64 empty_size
, u64 hint_byte
,
2289 u64 search_end
, struct btrfs_key
*ins
, int data
);
2290 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2291 struct btrfs_root
*root
, u64 bytenr
,
2292 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2293 int btrfs_set_block_flags(struct btrfs_trans_handle
*trans
,
2294 struct btrfs_root
*root
,
2295 u64 bytenr
, int level
, u64 flags
);
2296 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2297 struct extent_buffer
*buf
, int record_parent
);
2298 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2299 struct extent_buffer
*buf
, int record_parent
);
2300 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2301 struct btrfs_root
*root
,
2302 u64 bytenr
, u64 num_bytes
, u64 parent
,
2303 u64 root_objectid
, u64 owner
, u64 offset
);
2304 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2305 struct btrfs_root
*root
,
2306 struct extent_io_tree
*unpin
);
2307 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2308 struct btrfs_root
*root
,
2309 u64 bytenr
, u64 num_bytes
, u64 parent
,
2310 u64 root_objectid
, u64 ref_generation
,
2311 u64 owner_objectid
);
2312 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
2313 struct btrfs_root
*root
, u64 bytenr
,
2314 u64 orig_parent
, u64 parent
,
2315 u64 root_objectid
, u64 ref_generation
,
2316 u64 owner_objectid
);
2317 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2318 struct btrfs_root
*root
);
2319 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2320 int btrfs_read_block_groups(struct btrfs_root
*root
);
2321 struct btrfs_block_group_cache
*
2322 btrfs_add_block_group(struct btrfs_fs_info
*fs_info
, u64 bytes_used
, u64 type
,
2323 u64 chunk_objectid
, u64 chunk_offset
, u64 size
);
2324 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2325 struct btrfs_root
*root
, u64 bytes_used
,
2326 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2328 int btrfs_make_block_groups(struct btrfs_trans_handle
*trans
,
2329 struct btrfs_root
*root
);
2330 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
2331 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
2332 int alloc
, int mark_free
);
2333 int btrfs_record_file_extent(struct btrfs_trans_handle
*trans
,
2334 struct btrfs_root
*root
, u64 objectid
,
2335 struct btrfs_inode_item
*inode
,
2336 u64 file_pos
, u64 disk_bytenr
,
2338 int btrfs_free_block_group(struct btrfs_trans_handle
*trans
,
2339 struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 len
);
2340 void free_excluded_extents(struct btrfs_root
*root
,
2341 struct btrfs_block_group_cache
*cache
);
2342 int exclude_super_stripes(struct btrfs_root
*root
,
2343 struct btrfs_block_group_cache
*cache
);
2344 u64
add_new_free_space(struct btrfs_block_group_cache
*block_group
,
2345 struct btrfs_fs_info
*info
, u64 start
, u64 end
);
2347 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2348 int btrfs_del_ptr(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2349 struct btrfs_path
*path
, int level
, int slot
);
2350 enum btrfs_tree_block_status
2351 btrfs_check_node(struct btrfs_root
*root
, struct btrfs_disk_key
*parent_key
,
2352 struct extent_buffer
*buf
);
2353 enum btrfs_tree_block_status
2354 btrfs_check_leaf(struct btrfs_root
*root
, struct btrfs_disk_key
*parent_key
,
2355 struct extent_buffer
*buf
);
2356 void reada_for_search(struct btrfs_root
*root
, struct btrfs_path
*path
,
2357 int level
, int slot
, u64 objectid
);
2358 struct extent_buffer
*read_node_slot(struct btrfs_root
*root
,
2359 struct extent_buffer
*parent
, int slot
);
2360 int btrfs_previous_item(struct btrfs_root
*root
,
2361 struct btrfs_path
*path
, u64 min_objectid
,
2363 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2364 struct btrfs_path
*path
, u64 min_objectid
);
2365 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2366 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2367 struct extent_buffer
*parent
, int parent_slot
,
2368 struct extent_buffer
**cow_ret
);
2369 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2370 struct btrfs_root
*root
,
2371 struct extent_buffer
*buf
,
2372 struct extent_buffer
*parent
, int parent_slot
,
2373 struct extent_buffer
**cow_ret
,
2374 u64 search_start
, u64 empty_size
);
2375 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2376 struct btrfs_root
*root
,
2377 struct extent_buffer
*buf
,
2378 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2379 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2380 *root
, struct btrfs_path
*path
, u32 data_size
);
2381 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2382 struct btrfs_root
*root
,
2383 struct btrfs_path
*path
,
2384 u32 new_size
, int from_end
);
2385 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2386 struct btrfs_root
*root
,
2387 struct btrfs_path
*path
,
2388 struct btrfs_key
*new_key
,
2389 unsigned long split_offset
);
2390 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2391 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2393 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*found_path
,
2394 u64 iobjectid
, u64 ioff
, u8 key_type
,
2395 struct btrfs_key
*found_key
);
2396 void btrfs_release_path(struct btrfs_path
*p
);
2397 void add_root_to_dirty_list(struct btrfs_root
*root
);
2398 struct btrfs_path
*btrfs_alloc_path(void);
2399 void btrfs_free_path(struct btrfs_path
*p
);
2400 void btrfs_init_path(struct btrfs_path
*p
);
2401 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2402 struct btrfs_path
*path
, int slot
, int nr
);
2404 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2405 struct btrfs_root
*root
,
2406 struct btrfs_path
*path
)
2408 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2411 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2412 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2413 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2414 struct btrfs_root
*root
,
2415 struct btrfs_path
*path
,
2416 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2418 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2419 struct btrfs_root
*root
,
2420 struct btrfs_path
*path
,
2421 struct btrfs_key
*key
,
2424 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2427 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2428 static inline int btrfs_next_item(struct btrfs_root
*root
,
2429 struct btrfs_path
*p
)
2432 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2433 return btrfs_next_leaf(root
, p
);
2437 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2438 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2439 void btrfs_fixup_low_keys(struct btrfs_root
*root
, struct btrfs_path
*path
,
2440 struct btrfs_disk_key
*key
, int level
);
2441 int btrfs_set_item_key_safe(struct btrfs_root
*root
, struct btrfs_path
*path
,
2442 struct btrfs_key
*new_key
);
2443 void btrfs_set_item_key_unsafe(struct btrfs_root
*root
,
2444 struct btrfs_path
*path
,
2445 struct btrfs_key
*new_key
);
2448 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2449 struct btrfs_root
*tree_root
,
2450 u64 root_id
, u8 type
, u64 ref_id
,
2451 u64 dirid
, u64 sequence
,
2452 const char *name
, int name_len
);
2453 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2454 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2456 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2457 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2459 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2460 btrfs_root_item
*item
, struct btrfs_key
*key
);
2462 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2463 *root
, const char *name
, int name_len
, u64 dir
,
2464 struct btrfs_key
*location
, u8 type
, u64 index
);
2465 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2466 struct btrfs_root
*root
,
2467 struct btrfs_path
*path
, u64 dir
,
2468 const char *name
, int name_len
,
2470 struct btrfs_dir_item
*btrfs_lookup_dir_index(struct btrfs_trans_handle
*trans
,
2471 struct btrfs_root
*root
,
2472 struct btrfs_path
*path
, u64 dir
,
2473 const char *name
, int name_len
,
2474 u64 index
, int mod
);
2475 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2476 struct btrfs_root
*root
,
2477 struct btrfs_path
*path
,
2478 struct btrfs_dir_item
*di
);
2479 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2480 struct btrfs_root
*root
, const char *name
,
2481 u16 name_len
, const void *data
, u16 data_len
,
2484 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2485 struct btrfs_root
*fs_root
,
2486 u64 dirid
, u64
*objectid
);
2489 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2490 struct btrfs_root
*root
,
2491 const char *name
, int name_len
,
2492 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2493 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2494 *root
, u64 objectid
, struct btrfs_inode_item
2496 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2497 *root
, struct btrfs_path
*path
,
2498 struct btrfs_key
*location
, int mod
);
2499 struct btrfs_inode_extref
*btrfs_lookup_inode_extref(struct btrfs_trans_handle
2500 *trans
, struct btrfs_path
*path
, struct btrfs_root
*root
,
2501 u64 ino
, u64 parent_ino
, u64 index
, const char *name
,
2502 int namelen
, int ins_len
);
2503 int btrfs_del_inode_extref(struct btrfs_trans_handle
*trans
,
2504 struct btrfs_root
*root
,
2505 const char *name
, int name_len
,
2506 u64 inode_objectid
, u64 ref_objectid
,
2508 int btrfs_insert_inode_extref(struct btrfs_trans_handle
*trans
,
2509 struct btrfs_root
*root
,
2510 const char *name
, int name_len
,
2511 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2512 struct btrfs_inode_ref
*btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2513 struct btrfs_root
*root
, struct btrfs_path
*path
,
2514 const char *name
, int namelen
, u64 ino
, u64 parent_ino
,
2515 u64 index
, int ins_len
);
2516 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2517 struct btrfs_root
*root
, const char *name
, int name_len
,
2518 u64 ino
, u64 parent_ino
, u64
*index
);
2521 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2522 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2523 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2524 struct btrfs_root
*root
,
2525 u64 objectid
, u64 pos
, u64 offset
,
2528 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
2529 struct btrfs_root
*root
, u64 objectid
,
2530 u64 offset
, char *buffer
, size_t size
);
2531 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
2532 struct btrfs_root
*root
, u64 alloc_end
,
2533 u64 bytenr
, char *data
, size_t len
);
2534 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2535 struct btrfs_root
*root
, struct btrfs_path
*path
,
2539 int btrfs_lookup_uuid_subvol_item(int fd
, const u8
*uuid
, u64
*subvol_id
);
2540 int btrfs_lookup_uuid_received_subvol_item(int fd
, const u8
*uuid
,
2543 static inline int is_fstree(u64 rootid
)
2545 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
2546 (signed long long)rootid
>= (signed long long)BTRFS_FIRST_FREE_OBJECTID
)
2552 int check_dir_conflict(struct btrfs_root
*root
, char *name
, int namelen
,
2553 u64 dir
, u64 index
);
2554 int btrfs_new_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2556 int btrfs_add_link(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2557 u64 ino
, u64 parent_ino
, char *name
, int namelen
,
2558 u8 type
, u64
*index
, int add_backref
);
2559 int btrfs_unlink(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2560 u64 ino
, u64 parent_ino
, u64 index
, const char *name
,
2561 int namelen
, int add_orphan
);
2562 int btrfs_add_orphan_item(struct btrfs_trans_handle
*trans
,
2563 struct btrfs_root
*root
, struct btrfs_path
*path
,
2565 int btrfs_mkdir(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2566 char *name
, int namelen
, u64 parent_ino
, u64
*ino
, int mode
);
2569 int btrfs_get_extent(struct btrfs_trans_handle
*trans
,
2570 struct btrfs_root
*root
,
2571 struct btrfs_path
*path
,
2572 u64 ino
, u64 offset
, u64 len
, int ins_len
);
2573 int btrfs_punch_hole(struct btrfs_trans_handle
*trans
,
2574 struct btrfs_root
*root
,
2575 u64 ino
, u64 offset
, u64 len
);