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.
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 /* for storing balance parameters in the root tree */
80 #define BTRFS_BALANCE_OBJECTID -4ULL
82 /* oprhan objectid for tracking unlinked/truncated files */
83 #define BTRFS_ORPHAN_OBJECTID -5ULL
85 /* does write ahead logging to speed up fsyncs */
86 #define BTRFS_TREE_LOG_OBJECTID -6ULL
87 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
90 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
91 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
94 * extent checksums all have this objectid
95 * this allows them to share the logging tree
98 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
100 /* For storing free space cache */
101 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
104 * The inode number assigned to the special inode for sotring
107 #define BTRFS_FREE_INO_OBJECTID -12ULL
109 /* dummy objectid represents multiple objectids */
110 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
113 * All files have objectids in this range.
115 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
116 #define BTRFS_LAST_FREE_OBJECTID -256ULL
117 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
122 * the device items go into the chunk tree. The key is in the form
123 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
125 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
128 * the max metadata block size. This limit is somewhat artificial,
129 * but the memmove costs go through the roof for larger blocks.
131 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
134 * we can actually store much bigger names, but lets not confuse the rest
137 #define BTRFS_NAME_LEN 255
140 * Theoretical limit is larger, but we keep this down to a sane
141 * value. That should limit greatly the possibility of collisions on
144 #define BTRFS_LINK_MAX 65535U
146 /* 32 bytes in various csum fields */
147 #define BTRFS_CSUM_SIZE 32
150 #define BTRFS_CSUM_TYPE_CRC32 0
152 static int btrfs_csum_sizes
[] = { 4, 0 };
154 /* four bytes for CRC32 */
155 #define BTRFS_CRC32_SIZE 4
156 #define BTRFS_EMPTY_DIR_SIZE 0
158 #define BTRFS_FT_UNKNOWN 0
159 #define BTRFS_FT_REG_FILE 1
160 #define BTRFS_FT_DIR 2
161 #define BTRFS_FT_CHRDEV 3
162 #define BTRFS_FT_BLKDEV 4
163 #define BTRFS_FT_FIFO 5
164 #define BTRFS_FT_SOCK 6
165 #define BTRFS_FT_SYMLINK 7
166 #define BTRFS_FT_XATTR 8
167 #define BTRFS_FT_MAX 9
169 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
172 * the key defines the order in the tree, and so it also defines (optimal)
173 * block layout. objectid corresonds to the inode number. The flags
174 * tells us things about the object, and is a kind of stream selector.
175 * so for a given inode, keys with flags of 1 might refer to the inode
176 * data, flags of 2 may point to file data in the btree and flags == 3
177 * may point to extents.
179 * offset is the starting byte offset for this key in the stream.
181 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
182 * in cpu native order. Otherwise they are identical and their sizes
183 * should be the same (ie both packed)
185 struct btrfs_disk_key
{
189 } __attribute__ ((__packed__
));
195 } __attribute__ ((__packed__
));
197 struct btrfs_mapping_tree
{
198 struct cache_tree cache_tree
;
201 #define BTRFS_UUID_SIZE 16
202 struct btrfs_dev_item
{
203 /* the internal btrfs device id */
206 /* size of the device */
212 /* optimal io alignment for this device */
215 /* optimal io width for this device */
218 /* minimal io size for this device */
221 /* type and info about this device */
224 /* expected generation for this device */
228 * starting byte of this partition on the device,
229 * to allowr for stripe alignment in the future
233 /* grouping information for allocation decisions */
236 /* seek speed 0-100 where 100 is fastest */
239 /* bandwidth 0-100 where 100 is fastest */
242 /* btrfs generated uuid for this device */
243 u8 uuid
[BTRFS_UUID_SIZE
];
245 /* uuid of FS who owns this device */
246 u8 fsid
[BTRFS_UUID_SIZE
];
247 } __attribute__ ((__packed__
));
249 struct btrfs_stripe
{
252 u8 dev_uuid
[BTRFS_UUID_SIZE
];
253 } __attribute__ ((__packed__
));
256 /* size of this chunk in bytes */
259 /* objectid of the root referencing this chunk */
265 /* optimal io alignment for this chunk */
268 /* optimal io width for this chunk */
271 /* minimal io size for this chunk */
274 /* 2^16 stripes is quite a lot, a second limit is the size of a single
279 /* sub stripes only matter for raid10 */
281 struct btrfs_stripe stripe
;
282 /* additional stripes go here */
283 } __attribute__ ((__packed__
));
285 #define BTRFS_FREE_SPACE_EXTENT 1
286 #define BTRFS_FREE_SPACE_BITMAP 2
288 struct btrfs_free_space_entry
{
292 } __attribute__ ((__packed__
));
294 struct btrfs_free_space_header
{
295 struct btrfs_disk_key location
;
299 } __attribute__ ((__packed__
));
301 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
303 BUG_ON(num_stripes
== 0);
304 return sizeof(struct btrfs_chunk
) +
305 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
308 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
309 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
310 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
311 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
313 #define BTRFS_BACKREF_REV_MAX 256
314 #define BTRFS_BACKREF_REV_SHIFT 56
315 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
316 BTRFS_BACKREF_REV_SHIFT)
318 #define BTRFS_OLD_BACKREF_REV 0
319 #define BTRFS_MIXED_BACKREF_REV 1
322 * every tree block (leaf or node) starts with this header.
324 struct btrfs_header
{
325 /* these first four must match the super block */
326 u8 csum
[BTRFS_CSUM_SIZE
];
327 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
328 __le64 bytenr
; /* which block this node is supposed to live in */
331 /* allowed to be different from the super from here on down */
332 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
337 } __attribute__ ((__packed__
));
339 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
340 sizeof(struct btrfs_header)) / \
341 sizeof(struct btrfs_key_ptr))
342 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
343 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
344 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
345 sizeof(struct btrfs_item) - \
346 sizeof(struct btrfs_file_extent_item))
347 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
348 sizeof(struct btrfs_item) -\
349 sizeof(struct btrfs_dir_item))
353 * this is a very generous portion of the super block, giving us
354 * room to translate 14 chunks with 3 stripes each.
356 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
357 #define BTRFS_LABEL_SIZE 256
360 * just in case we somehow lose the roots and are not able to mount,
361 * we store an array of the roots from previous transactions
364 #define BTRFS_NUM_BACKUP_ROOTS 4
365 struct btrfs_root_backup
{
367 __le64 tree_root_gen
;
370 __le64 chunk_root_gen
;
373 __le64 extent_root_gen
;
382 __le64 csum_root_gen
;
392 u8 extent_root_level
;
396 /* future and to align */
398 } __attribute__ ((__packed__
));
401 * the super block basically lists the main trees of the FS
402 * it currently lacks any block count etc etc
404 struct btrfs_super_block
{
405 u8 csum
[BTRFS_CSUM_SIZE
];
406 /* the first 3 fields must match struct btrfs_header */
407 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
408 __le64 bytenr
; /* this block number */
411 /* allowed to be different from the btrfs_header from here own down */
418 /* this will help find the new super based on the log root */
419 __le64 log_root_transid
;
422 __le64 root_dir_objectid
;
428 __le32 sys_chunk_array_size
;
429 __le64 chunk_root_generation
;
431 __le64 compat_ro_flags
;
432 __le64 incompat_flags
;
437 struct btrfs_dev_item dev_item
;
439 char label
[BTRFS_LABEL_SIZE
];
441 __le64 cache_generation
;
442 __le64 uuid_tree_generation
;
444 /* future expansion */
446 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
447 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
448 } __attribute__ ((__packed__
));
451 * Compat flags that we support. If any incompat flags are set other than the
452 * ones specified below then we will fail to mount
454 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
455 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
456 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
457 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
460 * some patches floated around with a second compression method
461 * lets save that incompat here for when they do get in
462 * Note we don't actually support it, we're just reserving the
465 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
468 * older kernels tried to do bigger metadata blocks, but the
469 * code was pretty buggy. Lets not let them try anymore.
471 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
472 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
473 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
474 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
475 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
478 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
479 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
480 #define BTRFS_FEATURE_INCOMPAT_SUPP \
481 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
482 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
483 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
484 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
485 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
486 BTRFS_FEATURE_INCOMPAT_RAID56 | \
487 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
488 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
489 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
492 * A leaf is full of items. offset and size tell us where to find
493 * the item in the leaf (relative to the start of the data area)
496 struct btrfs_disk_key key
;
499 } __attribute__ ((__packed__
));
502 * leaves have an item area and a data area:
503 * [item0, item1....itemN] [free space] [dataN...data1, data0]
505 * The data is separate from the items to get the keys closer together
509 struct btrfs_header header
;
510 struct btrfs_item items
[];
511 } __attribute__ ((__packed__
));
514 * all non-leaf blocks are nodes, they hold only keys and pointers to
517 struct btrfs_key_ptr
{
518 struct btrfs_disk_key key
;
521 } __attribute__ ((__packed__
));
524 struct btrfs_header header
;
525 struct btrfs_key_ptr ptrs
[];
526 } __attribute__ ((__packed__
));
529 * btrfs_paths remember the path taken from the root down to the leaf.
530 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
531 * to any other levels that are present.
533 * The slots array records the index of the item or block pointer
534 * used while walking the tree.
538 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
539 int slots
[BTRFS_MAX_LEVEL
];
540 /* if there is real range locking, this locks field will change */
541 int locks
[BTRFS_MAX_LEVEL
];
543 /* keep some upper locks as we walk down */
547 * set by btrfs_split_item, tells search_slot to keep all locks
548 * and to force calls to keep space in the nodes
550 unsigned int search_for_split
:1;
551 unsigned int skip_check_block
:1;
555 * items in the extent btree are used to record the objectid of the
556 * owner of the block and the number of references
559 struct btrfs_extent_item
{
563 } __attribute__ ((__packed__
));
565 struct btrfs_extent_item_v0
{
567 } __attribute__ ((__packed__
));
569 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
570 sizeof(struct btrfs_item))
572 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
573 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
575 /* following flags only apply to tree blocks */
577 /* use full backrefs for extent pointers in the block*/
578 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
580 struct btrfs_tree_block_info
{
581 struct btrfs_disk_key key
;
583 } __attribute__ ((__packed__
));
585 struct btrfs_extent_data_ref
{
590 } __attribute__ ((__packed__
));
592 struct btrfs_shared_data_ref
{
594 } __attribute__ ((__packed__
));
596 struct btrfs_extent_inline_ref
{
599 } __attribute__ ((__packed__
));
601 struct btrfs_extent_ref_v0
{
606 } __attribute__ ((__packed__
));
608 /* dev extents record free space on individual devices. The owner
609 * field points back to the chunk allocation mapping tree that allocated
610 * the extent. The chunk tree uuid field is a way to double check the owner
612 struct btrfs_dev_extent
{
614 __le64 chunk_objectid
;
617 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
618 } __attribute__ ((__packed__
));
620 struct btrfs_inode_ref
{
624 } __attribute__ ((__packed__
));
626 struct btrfs_inode_extref
{
627 __le64 parent_objectid
;
630 __u8 name
[0]; /* name goes here */
631 } __attribute__ ((__packed__
));
633 struct btrfs_timespec
{
636 } __attribute__ ((__packed__
));
639 BTRFS_COMPRESS_NONE
= 0,
640 BTRFS_COMPRESS_ZLIB
= 1,
641 BTRFS_COMPRESS_LZO
= 2,
642 BTRFS_COMPRESS_TYPES
= 2,
643 BTRFS_COMPRESS_LAST
= 3,
644 } btrfs_compression_type
;
646 /* we don't understand any encryption methods right now */
648 BTRFS_ENCRYPTION_NONE
= 0,
649 BTRFS_ENCRYPTION_LAST
= 1,
650 } btrfs_encryption_type
;
652 enum btrfs_tree_block_status
{
653 BTRFS_TREE_BLOCK_CLEAN
,
654 BTRFS_TREE_BLOCK_INVALID_NRITEMS
,
655 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY
,
656 BTRFS_TREE_BLOCK_BAD_KEY_ORDER
,
657 BTRFS_TREE_BLOCK_INVALID_LEVEL
,
658 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE
,
659 BTRFS_TREE_BLOCK_INVALID_OFFSETS
,
662 struct btrfs_inode_item
{
663 /* nfs style generation number */
665 /* transid that last touched this inode */
677 /* modification sequence number for NFS */
681 * a little future expansion, for more than this we can
682 * just grow the inode item and version it
685 struct btrfs_timespec atime
;
686 struct btrfs_timespec ctime
;
687 struct btrfs_timespec mtime
;
688 struct btrfs_timespec otime
;
689 } __attribute__ ((__packed__
));
691 struct btrfs_dir_log_item
{
693 } __attribute__ ((__packed__
));
695 struct btrfs_dir_item
{
696 struct btrfs_disk_key location
;
701 } __attribute__ ((__packed__
));
703 struct btrfs_root_item_v0
{
704 struct btrfs_inode_item inode
;
710 __le64 last_snapshot
;
713 struct btrfs_disk_key drop_progress
;
716 } __attribute__ ((__packed__
));
718 struct btrfs_root_item
{
719 struct btrfs_inode_item inode
;
725 __le64 last_snapshot
;
728 struct btrfs_disk_key drop_progress
;
733 * The following fields appear after subvol_uuids+subvol_times
738 * This generation number is used to test if the new fields are valid
739 * and up to date while reading the root item. Everytime the root item
740 * is written out, the "generation" field is copied into this field. If
741 * anyone ever mounted the fs with an older kernel, we will have
742 * mismatching generation values here and thus must invalidate the
743 * new fields. See btrfs_update_root and btrfs_find_last_root for
745 * the offset of generation_v2 is also used as the start for the memset
746 * when invalidating the fields.
748 __le64 generation_v2
;
749 u8 uuid
[BTRFS_UUID_SIZE
];
750 u8 parent_uuid
[BTRFS_UUID_SIZE
];
751 u8 received_uuid
[BTRFS_UUID_SIZE
];
752 __le64 ctransid
; /* updated when an inode changes */
753 __le64 otransid
; /* trans when created */
754 __le64 stransid
; /* trans when sent. non-zero for received subvol */
755 __le64 rtransid
; /* trans when received. non-zero for received subvol */
756 struct btrfs_timespec ctime
;
757 struct btrfs_timespec otime
;
758 struct btrfs_timespec stime
;
759 struct btrfs_timespec rtime
;
760 __le64 reserved
[8]; /* for future */
761 } __attribute__ ((__packed__
));
764 * this is used for both forward and backward root refs
766 struct btrfs_root_ref
{
770 } __attribute__ ((__packed__
));
772 #define BTRFS_FILE_EXTENT_INLINE 0
773 #define BTRFS_FILE_EXTENT_REG 1
774 #define BTRFS_FILE_EXTENT_PREALLOC 2
776 struct btrfs_file_extent_item
{
778 * transaction id that created this extent
782 * max number of bytes to hold this extent in ram
783 * when we split a compressed extent we can't know how big
784 * each of the resulting pieces will be. So, this is
785 * an upper limit on the size of the extent in ram instead of
791 * 32 bits for the various ways we might encode the data,
792 * including compression and encryption. If any of these
793 * are set to something a given disk format doesn't understand
794 * it is treated like an incompat flag for reading and writing,
799 __le16 other_encoding
; /* spare for later use */
801 /* are we inline data or a real extent? */
805 * disk space consumed by the extent, checksum blocks are included
809 __le64 disk_num_bytes
;
811 * the logical offset in file blocks (no csums)
812 * this extent record is for. This allows a file extent to point
813 * into the middle of an existing extent on disk, sharing it
814 * between two snapshots (useful if some bytes in the middle of the
815 * extent have changed
819 * the logical number of file blocks (no csums included)
823 } __attribute__ ((__packed__
));
825 struct btrfs_csum_item
{
827 } __attribute__ ((__packed__
));
830 * We don't want to overwrite 1M at the beginning of device, even though
831 * there is our 1st superblock at 64k. Some possible reasons:
832 * - the first 64k blank is useful for some boot loader/manager
833 * - the first 1M could be scratched by buggy partitioner or somesuch
835 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
837 /* tag for the radix tree of block groups in ram */
838 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
839 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
840 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
841 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
842 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
843 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
844 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
845 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
846 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
847 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
848 #define BTRFS_NR_RAID_TYPES 7
850 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
851 BTRFS_BLOCK_GROUP_SYSTEM | \
852 BTRFS_BLOCK_GROUP_METADATA)
854 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
855 BTRFS_BLOCK_GROUP_RAID1 | \
856 BTRFS_BLOCK_GROUP_RAID5 | \
857 BTRFS_BLOCK_GROUP_RAID6 | \
858 BTRFS_BLOCK_GROUP_DUP | \
859 BTRFS_BLOCK_GROUP_RAID10)
861 /* used in struct btrfs_balance_args fields */
862 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
865 * GLOBAL_RSV does not exist as a on-disk block group type and is used
866 * internally for exporting info about global block reserve from space infos
868 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
870 #define BTRFS_QGROUP_STATUS_OFF 0
871 #define BTRFS_QGROUP_STATUS_ON 1
872 #define BTRFS_QGROUP_STATUS_SCANNING 2
874 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1 << 0)
876 struct btrfs_qgroup_status_item
{
880 __le64 scan
; /* progress during scanning */
881 } __attribute__ ((__packed__
));
883 struct btrfs_block_group_item
{
885 __le64 chunk_objectid
;
887 } __attribute__ ((__packed__
));
889 struct btrfs_qgroup_info_item
{
892 __le64 referenced_compressed
;
894 __le64 exclusive_compressed
;
895 } __attribute__ ((__packed__
));
897 /* flags definition for qgroup limits */
898 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
899 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
900 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
901 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
902 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
903 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
905 struct btrfs_qgroup_limit_item
{
907 __le64 max_referenced
;
908 __le64 max_exclusive
;
909 __le64 rsv_referenced
;
910 __le64 rsv_exclusive
;
911 } __attribute__ ((__packed__
));
913 struct btrfs_space_info
{
919 struct list_head list
;
922 struct btrfs_block_group_cache
{
923 struct cache_extent cache
;
924 struct btrfs_key key
;
925 struct btrfs_block_group_item item
;
926 struct btrfs_space_info
*space_info
;
927 struct btrfs_free_space_ctl
*free_space_ctl
;
934 struct btrfs_extent_ops
{
935 int (*alloc_extent
)(struct btrfs_root
*root
, u64 num_bytes
,
936 u64 hint_byte
, struct btrfs_key
*ins
);
937 int (*free_extent
)(struct btrfs_root
*root
, u64 bytenr
,
942 struct btrfs_fs_devices
;
943 struct btrfs_fs_info
{
944 u8 fsid
[BTRFS_FSID_SIZE
];
945 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
946 struct btrfs_root
*fs_root
;
947 struct btrfs_root
*extent_root
;
948 struct btrfs_root
*tree_root
;
949 struct btrfs_root
*chunk_root
;
950 struct btrfs_root
*dev_root
;
951 struct btrfs_root
*csum_root
;
952 struct btrfs_root
*quota_root
;
954 struct rb_root fs_root_tree
;
956 /* the log root tree is a directory of all the other log roots */
957 struct btrfs_root
*log_root_tree
;
959 struct extent_io_tree extent_cache
;
960 struct extent_io_tree free_space_cache
;
961 struct extent_io_tree block_group_cache
;
962 struct extent_io_tree pinned_extents
;
963 struct extent_io_tree pending_del
;
964 struct extent_io_tree extent_ins
;
966 /* logical->physical extent mapping */
967 struct btrfs_mapping_tree mapping_tree
;
970 u64 last_trans_committed
;
972 u64 avail_data_alloc_bits
;
973 u64 avail_metadata_alloc_bits
;
974 u64 avail_system_alloc_bits
;
975 u64 data_alloc_profile
;
976 u64 metadata_alloc_profile
;
977 u64 system_alloc_profile
;
980 struct btrfs_trans_handle
*running_transaction
;
981 struct btrfs_super_block
*super_copy
;
982 struct mutex fs_mutex
;
987 struct btrfs_extent_ops
*extent_ops
;
988 struct list_head dirty_cowonly_roots
;
989 struct list_head recow_ebs
;
991 struct btrfs_fs_devices
*fs_devices
;
992 struct list_head space_info
;
995 unsigned int readonly
:1;
996 unsigned int on_restoring
:1;
997 unsigned int is_chunk_recover
:1;
998 unsigned int quota_enabled
:1;
1000 int (*free_extent_hook
)(struct btrfs_trans_handle
*trans
,
1001 struct btrfs_root
*root
,
1002 u64 bytenr
, u64 num_bytes
, u64 parent
,
1003 u64 root_objectid
, u64 owner
, u64 offset
,
1005 struct cache_tree
*fsck_extent_cache
;
1006 struct cache_tree
*corrupt_blocks
;
1010 * in ram representation of the tree. extent_root is used for all allocations
1011 * and for the extent tree extent_root root.
1014 struct extent_buffer
*node
;
1015 struct extent_buffer
*commit_root
;
1016 struct btrfs_root_item root_item
;
1017 struct btrfs_key root_key
;
1018 struct btrfs_fs_info
*fs_info
;
1022 /* data allocations are done in sectorsize units */
1025 /* node allocations are done in nodesize units */
1028 /* leaf allocations are done in leafsize units */
1031 /* leaf allocations are done in leafsize units */
1040 u64 last_inode_alloc
;
1042 /* the dirty list is only used by non-reference counted roots */
1043 struct list_head dirty_list
;
1044 struct rb_node rb_node
;
1048 * inode items have the data typically returned from stat and store other
1049 * info about object characteristics. There is one for every file and dir in
1052 #define BTRFS_INODE_ITEM_KEY 1
1053 #define BTRFS_INODE_REF_KEY 12
1054 #define BTRFS_INODE_EXTREF_KEY 13
1055 #define BTRFS_XATTR_ITEM_KEY 24
1056 #define BTRFS_ORPHAN_ITEM_KEY 48
1058 #define BTRFS_DIR_LOG_ITEM_KEY 60
1059 #define BTRFS_DIR_LOG_INDEX_KEY 72
1061 * dir items are the name -> inode pointers in a directory. There is one
1062 * for every name in a directory.
1064 #define BTRFS_DIR_ITEM_KEY 84
1065 #define BTRFS_DIR_INDEX_KEY 96
1068 * extent data is for file data
1070 #define BTRFS_EXTENT_DATA_KEY 108
1073 * csum items have the checksums for data in the extents
1075 #define BTRFS_CSUM_ITEM_KEY 120
1077 * extent csums are stored in a separate tree and hold csums for
1078 * an entire extent on disk.
1080 #define BTRFS_EXTENT_CSUM_KEY 128
1083 * root items point to tree roots. There are typically in the root
1084 * tree used by the super block to find all the other trees
1086 #define BTRFS_ROOT_ITEM_KEY 132
1089 * root backrefs tie subvols and snapshots to the directory entries that
1092 #define BTRFS_ROOT_BACKREF_KEY 144
1095 * root refs make a fast index for listing all of the snapshots and
1096 * subvolumes referenced by a given root. They point directly to the
1097 * directory item in the root that references the subvol
1099 #define BTRFS_ROOT_REF_KEY 156
1102 * extent items are in the extent map tree. These record which blocks
1103 * are used, and how many references there are to each block
1105 #define BTRFS_EXTENT_ITEM_KEY 168
1108 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1109 * the length, so we save the level in key->offset instead of the length.
1111 #define BTRFS_METADATA_ITEM_KEY 169
1113 #define BTRFS_TREE_BLOCK_REF_KEY 176
1115 #define BTRFS_EXTENT_DATA_REF_KEY 178
1117 /* old style extent backrefs */
1118 #define BTRFS_EXTENT_REF_V0_KEY 180
1120 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1122 #define BTRFS_SHARED_DATA_REF_KEY 184
1126 * block groups give us hints into the extent allocation trees. Which
1127 * blocks are free etc etc
1129 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1131 #define BTRFS_DEV_EXTENT_KEY 204
1132 #define BTRFS_DEV_ITEM_KEY 216
1133 #define BTRFS_CHUNK_ITEM_KEY 228
1135 #define BTRFS_BALANCE_ITEM_KEY 248
1140 #define BTRFS_QGROUP_STATUS_KEY 240
1141 #define BTRFS_QGROUP_INFO_KEY 242
1142 #define BTRFS_QGROUP_LIMIT_KEY 244
1143 #define BTRFS_QGROUP_RELATION_KEY 246
1146 * Persistently stores the io stats in the device tree.
1147 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1149 #define BTRFS_DEV_STATS_KEY 249
1152 * Persistently stores the device replace state in the device tree.
1153 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1155 #define BTRFS_DEV_REPLACE_KEY 250
1158 * Stores items that allow to quickly map UUIDs to something else.
1159 * These items are part of the filesystem UUID tree.
1160 * The key is built like this:
1161 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1163 #if BTRFS_UUID_SIZE != 16
1164 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1166 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1167 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1168 * received subvols */
1171 * string items are for debugging. They just store a short string of
1174 #define BTRFS_STRING_ITEM_KEY 253
1178 #define BTRFS_INODE_NODATASUM (1 << 0)
1179 #define BTRFS_INODE_NODATACOW (1 << 1)
1180 #define BTRFS_INODE_READONLY (1 << 2)
1182 #define read_eb_member(eb, ptr, type, member, result) ( \
1183 read_extent_buffer(eb, (char *)(result), \
1184 ((unsigned long)(ptr)) + \
1185 offsetof(type, member), \
1186 sizeof(((type *)0)->member)))
1188 #define write_eb_member(eb, ptr, type, member, result) ( \
1189 write_extent_buffer(eb, (char *)(result), \
1190 ((unsigned long)(ptr)) + \
1191 offsetof(type, member), \
1192 sizeof(((type *)0)->member)))
1194 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1195 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1197 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1198 return le##bits##_to_cpu(h->member); \
1200 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1203 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1204 h->member = cpu_to_le##bits(val); \
1207 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1208 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1211 unsigned long offset = (unsigned long)s; \
1212 const type *p = (type *) (eb->data + offset); \
1213 return get_unaligned_le##bits(&p->member); \
1215 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1216 type *s, u##bits val) \
1218 unsigned long offset = (unsigned long)s; \
1219 type *p = (type *) (eb->data + offset); \
1220 put_unaligned_le##bits(val, &p->member); \
1223 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1224 static inline u##bits btrfs_##name(const type *s) \
1226 return le##bits##_to_cpu(s->member); \
1228 static inline void btrfs_set_##name(type *s, u##bits val) \
1230 s->member = cpu_to_le##bits(val); \
1233 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1234 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1235 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1236 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1237 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1238 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1240 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1241 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1242 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1243 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1244 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1245 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1247 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1248 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1250 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1252 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1254 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1256 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1258 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1259 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1261 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1263 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1265 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1268 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1270 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1273 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1275 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1278 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1279 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1280 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1281 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1282 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1283 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1284 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1285 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1286 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1287 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1288 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1290 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1292 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1295 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1296 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1297 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1299 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1301 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1303 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1305 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1306 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1308 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1310 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1311 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1313 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1316 unsigned long offset
= (unsigned long)c
;
1317 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1318 offset
+= nr
* sizeof(struct btrfs_stripe
);
1319 return (struct btrfs_stripe
*)offset
;
1322 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1324 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1327 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1328 struct btrfs_chunk
*c
, int nr
)
1330 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1333 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1334 struct btrfs_chunk
*c
, int nr
,
1337 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1340 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1341 struct btrfs_chunk
*c
, int nr
)
1343 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1346 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1347 struct btrfs_chunk
*c
, int nr
,
1350 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1353 /* struct btrfs_block_group_item */
1354 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1356 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1358 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1359 struct btrfs_block_group_item
, chunk_objectid
, 64);
1361 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1362 struct btrfs_block_group_item
, chunk_objectid
, 64);
1363 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1364 struct btrfs_block_group_item
, flags
, 64);
1365 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1366 struct btrfs_block_group_item
, flags
, 64);
1368 /* struct btrfs_inode_ref */
1369 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1370 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1371 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1373 /* struct btrfs_inode_extref */
1374 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1375 parent_objectid
, 64);
1376 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1378 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1380 /* struct btrfs_inode_item */
1381 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1382 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1383 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1384 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1385 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1386 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1387 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1388 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1389 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1390 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1391 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1392 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1394 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
1395 struct btrfs_inode_item
, generation
, 64);
1396 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
,
1397 struct btrfs_inode_item
, generation
, 64);
1398 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
1399 struct btrfs_inode_item
, size
, 64);
1400 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
,
1401 struct btrfs_inode_item
, nbytes
, 64);
1402 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
1403 struct btrfs_inode_item
, block_group
, 64);
1404 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
1405 struct btrfs_inode_item
, nlink
, 32);
1406 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
1407 struct btrfs_inode_item
, uid
, 32);
1408 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
1409 struct btrfs_inode_item
, gid
, 32);
1410 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
1411 struct btrfs_inode_item
, mode
, 32);
1412 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
1413 struct btrfs_inode_item
, rdev
, 64);
1414 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
1415 struct btrfs_inode_item
, flags
, 64);
1417 static inline struct btrfs_timespec
*
1418 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1420 unsigned long ptr
= (unsigned long)inode_item
;
1421 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1422 return (struct btrfs_timespec
*)ptr
;
1425 static inline struct btrfs_timespec
*
1426 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1428 unsigned long ptr
= (unsigned long)inode_item
;
1429 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1430 return (struct btrfs_timespec
*)ptr
;
1433 static inline struct btrfs_timespec
*
1434 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1436 unsigned long ptr
= (unsigned long)inode_item
;
1437 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1438 return (struct btrfs_timespec
*)ptr
;
1441 static inline struct btrfs_timespec
*
1442 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1444 unsigned long ptr
= (unsigned long)inode_item
;
1445 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1446 return (struct btrfs_timespec
*)ptr
;
1449 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1450 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1451 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
1453 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
1456 /* struct btrfs_dev_extent */
1457 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1459 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1460 chunk_objectid
, 64);
1461 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1463 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1465 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1467 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1468 return (u8
*)((unsigned long)dev
+ ptr
);
1472 /* struct btrfs_extent_item */
1473 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1474 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
, refs
, 64);
1475 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1477 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1478 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags
, struct btrfs_extent_item
, flags
, 64);
1480 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1482 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1484 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1485 struct btrfs_tree_block_info
*item
,
1486 struct btrfs_disk_key
*key
)
1488 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1491 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1492 struct btrfs_tree_block_info
*item
,
1493 struct btrfs_disk_key
*key
)
1495 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1498 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1500 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1502 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1504 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1507 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1510 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1512 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1514 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type
,
1515 struct btrfs_extent_inline_ref
, type
, 8);
1516 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset
,
1517 struct btrfs_extent_inline_ref
, offset
, 64);
1519 static inline u32
btrfs_extent_inline_ref_size(int type
)
1521 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1522 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1523 return sizeof(struct btrfs_extent_inline_ref
);
1524 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1525 return sizeof(struct btrfs_shared_data_ref
) +
1526 sizeof(struct btrfs_extent_inline_ref
);
1527 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1528 return sizeof(struct btrfs_extent_data_ref
) +
1529 offsetof(struct btrfs_extent_inline_ref
, offset
);
1534 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1535 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1537 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1538 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1540 /* struct btrfs_node */
1541 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1542 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1544 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1547 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1548 sizeof(struct btrfs_key_ptr
) * nr
;
1549 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1552 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1556 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1557 sizeof(struct btrfs_key_ptr
) * nr
;
1558 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1561 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1564 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1565 sizeof(struct btrfs_key_ptr
) * nr
;
1566 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1569 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1573 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1574 sizeof(struct btrfs_key_ptr
) * nr
;
1575 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1578 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1580 return offsetof(struct btrfs_node
, ptrs
) +
1581 sizeof(struct btrfs_key_ptr
) * nr
;
1584 static inline void btrfs_node_key(struct extent_buffer
*eb
,
1585 struct btrfs_disk_key
*disk_key
, int nr
)
1588 ptr
= btrfs_node_key_ptr_offset(nr
);
1589 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1590 struct btrfs_key_ptr
, key
, disk_key
);
1593 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1594 struct btrfs_disk_key
*disk_key
, int nr
)
1597 ptr
= btrfs_node_key_ptr_offset(nr
);
1598 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1599 struct btrfs_key_ptr
, key
, disk_key
);
1602 /* struct btrfs_item */
1603 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1604 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1606 static inline unsigned long btrfs_item_nr_offset(int nr
)
1608 return offsetof(struct btrfs_leaf
, items
) +
1609 sizeof(struct btrfs_item
) * nr
;
1612 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1614 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1617 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1618 struct btrfs_item
*item
)
1620 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1623 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1625 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
1628 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1630 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
1633 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1635 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
1638 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1639 struct btrfs_disk_key
*disk_key
, int nr
)
1641 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1642 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1645 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1646 struct btrfs_disk_key
*disk_key
, int nr
)
1648 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1649 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1652 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1655 * struct btrfs_root_ref
1657 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1658 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1659 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1661 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1662 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1663 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1665 /* struct btrfs_dir_item */
1666 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1667 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1668 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1669 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1671 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1673 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1674 struct btrfs_dir_item
*item
,
1675 struct btrfs_disk_key
*key
)
1677 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1680 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1681 struct btrfs_dir_item
*item
,
1682 struct btrfs_disk_key
*key
)
1684 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1687 /* struct btrfs_free_space_header */
1688 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1690 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1692 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1695 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1696 struct btrfs_free_space_header
*h
,
1697 struct btrfs_disk_key
*key
)
1699 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1702 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1703 struct btrfs_free_space_header
*h
,
1704 struct btrfs_disk_key
*key
)
1706 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1709 /* struct btrfs_disk_key */
1710 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1712 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1713 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1715 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1716 struct btrfs_disk_key
*disk
)
1718 cpu
->offset
= le64_to_cpu(disk
->offset
);
1719 cpu
->type
= disk
->type
;
1720 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1723 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1724 struct btrfs_key
*cpu
)
1726 disk
->offset
= cpu_to_le64(cpu
->offset
);
1727 disk
->type
= cpu
->type
;
1728 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1731 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1732 struct btrfs_key
*key
, int nr
)
1734 struct btrfs_disk_key disk_key
;
1735 btrfs_node_key(eb
, &disk_key
, nr
);
1736 btrfs_disk_key_to_cpu(key
, &disk_key
);
1739 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1740 struct btrfs_key
*key
, int nr
)
1742 struct btrfs_disk_key disk_key
;
1743 btrfs_item_key(eb
, &disk_key
, nr
);
1744 btrfs_disk_key_to_cpu(key
, &disk_key
);
1747 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1748 struct btrfs_dir_item
*item
,
1749 struct btrfs_key
*key
)
1751 struct btrfs_disk_key disk_key
;
1752 btrfs_dir_item_key(eb
, item
, &disk_key
);
1753 btrfs_disk_key_to_cpu(key
, &disk_key
);
1757 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1762 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1767 /* struct btrfs_header */
1768 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1769 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1771 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1772 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1773 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1774 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1775 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
1776 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
, nritems
,
1778 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
1779 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
1782 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1784 return (btrfs_header_flags(eb
) & flag
) == flag
;
1787 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1789 u64 flags
= btrfs_header_flags(eb
);
1790 btrfs_set_header_flags(eb
, flags
| flag
);
1791 return (flags
& flag
) == flag
;
1794 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1796 u64 flags
= btrfs_header_flags(eb
);
1797 btrfs_set_header_flags(eb
, flags
& ~flag
);
1798 return (flags
& flag
) == flag
;
1801 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1803 u64 flags
= btrfs_header_flags(eb
);
1804 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1807 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1810 u64 flags
= btrfs_header_flags(eb
);
1811 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1812 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1813 btrfs_set_header_flags(eb
, flags
);
1816 static inline unsigned long btrfs_header_fsid(void)
1818 return offsetof(struct btrfs_header
, fsid
);
1821 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1823 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
1826 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1828 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1832 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1834 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1838 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1843 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1848 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1853 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1855 return (btrfs_header_level(eb
) == 0);
1858 /* struct btrfs_root_item */
1859 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1861 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1862 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1863 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1865 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1867 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1868 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1869 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1870 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1871 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1872 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1873 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1874 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1876 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
1878 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
1880 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
1882 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
1884 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
1887 /* struct btrfs_root_backup */
1888 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
1890 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
1892 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
1893 tree_root_level
, 8);
1895 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
1897 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
1898 chunk_root_gen
, 64);
1899 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
1900 chunk_root_level
, 8);
1902 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
1904 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
1905 extent_root_gen
, 64);
1906 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
1907 extent_root_level
, 8);
1909 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
1911 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
1913 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
1916 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
1918 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
1920 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
1923 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
1925 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
1927 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
1928 csum_root_level
, 8);
1929 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
1931 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
1933 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
1936 /* struct btrfs_super_block */
1938 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1939 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1940 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1942 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1943 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1944 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1945 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1946 struct btrfs_super_block
, chunk_root_generation
, 64);
1947 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1949 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1951 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1952 chunk_root_level
, 8);
1953 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1955 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1956 log_root_transid
, 64);
1957 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1959 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1961 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1963 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1965 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1967 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1969 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1971 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1972 root_dir_objectid
, 64);
1973 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1975 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1977 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1978 compat_ro_flags
, 64);
1979 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1980 incompat_flags
, 64);
1981 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1983 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
1984 cache_generation
, 64);
1985 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
1986 uuid_tree_generation
, 64);
1987 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
1989 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1991 int t
= btrfs_super_csum_type(s
);
1992 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1993 return btrfs_csum_sizes
[t
];
1996 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1998 return offsetof(struct btrfs_leaf
, items
);
2001 /* struct btrfs_file_extent_item */
2002 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2003 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2005 static inline unsigned long btrfs_file_extent_inline_start(struct
2006 btrfs_file_extent_item
*e
)
2008 unsigned long offset
= (unsigned long)e
;
2009 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2013 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2015 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2018 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2020 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2022 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2024 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
, struct btrfs_file_extent_item
,
2026 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2027 disk_num_bytes
, 64);
2028 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2030 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
, struct btrfs_file_extent_item
,
2032 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2034 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
, struct btrfs_file_extent_item
,
2036 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2038 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2040 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2042 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
, struct btrfs_file_extent_item
,
2044 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2046 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2047 other_encoding
, 16);
2049 /* btrfs_qgroup_status_item */
2050 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2052 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2054 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2056 BTRFS_SETGET_FUNCS(qgroup_status_scan
, struct btrfs_qgroup_status_item
,
2059 /* btrfs_qgroup_info_item */
2060 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2062 BTRFS_SETGET_FUNCS(qgroup_info_referenced
, struct btrfs_qgroup_info_item
,
2064 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed
,
2065 struct btrfs_qgroup_info_item
, referenced_compressed
, 64);
2066 BTRFS_SETGET_FUNCS(qgroup_info_exclusive
, struct btrfs_qgroup_info_item
,
2068 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed
,
2069 struct btrfs_qgroup_info_item
, exclusive_compressed
, 64);
2071 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2072 struct btrfs_qgroup_info_item
, generation
, 64);
2073 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced
,
2074 struct btrfs_qgroup_info_item
, referenced
, 64);
2075 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed
,
2076 struct btrfs_qgroup_info_item
, referenced_compressed
, 64);
2077 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive
,
2078 struct btrfs_qgroup_info_item
, exclusive
, 64);
2079 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed
,
2080 struct btrfs_qgroup_info_item
, exclusive_compressed
, 64);
2082 /* btrfs_qgroup_limit_item */
2083 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2085 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced
, struct btrfs_qgroup_limit_item
,
2086 max_referenced
, 64);
2087 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive
, struct btrfs_qgroup_limit_item
,
2089 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced
, struct btrfs_qgroup_limit_item
,
2090 rsv_referenced
, 64);
2091 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive
, struct btrfs_qgroup_limit_item
,
2094 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags
,
2095 struct btrfs_qgroup_limit_item
, flags
, 64);
2096 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced
,
2097 struct btrfs_qgroup_limit_item
, max_referenced
, 64);
2098 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive
,
2099 struct btrfs_qgroup_limit_item
, max_exclusive
, 64);
2100 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced
,
2101 struct btrfs_qgroup_limit_item
, rsv_referenced
, 64);
2102 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive
,
2103 struct btrfs_qgroup_limit_item
, rsv_exclusive
, 64);
2106 * this returns the number of bytes used by the item on disk, minus the
2107 * size of any extent headers. If a file is compressed on disk, this is
2108 * the compressed size
2110 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2111 struct btrfs_item
*e
)
2113 unsigned long offset
;
2114 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2115 return btrfs_item_size(eb
, e
) - offset
;
2118 /* this returns the number of file bytes represented by the inline item.
2119 * If an item is compressed, this is the uncompressed size
2121 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2123 struct btrfs_file_extent_item
*fi
)
2126 * return the space used on disk if this item isn't
2127 * compressed or encoded
2129 if (btrfs_file_extent_compression(eb
, fi
) == 0 &&
2130 btrfs_file_extent_encryption(eb
, fi
) == 0 &&
2131 btrfs_file_extent_other_encoding(eb
, fi
) == 0) {
2132 return btrfs_file_extent_inline_item_len(eb
,
2133 btrfs_item_nr(slot
));
2136 /* otherwise use the ram bytes field */
2137 return btrfs_file_extent_ram_bytes(eb
, fi
);
2140 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
2142 return root
->leafsize
;
2143 return root
->nodesize
;
2146 static inline int btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
2148 struct btrfs_super_block
*disk_super
;
2149 disk_super
= fs_info
->super_copy
;
2150 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
2153 /* helper function to cast into the data area of the leaf. */
2154 #define btrfs_item_ptr(leaf, slot, type) \
2155 ((type *)(btrfs_leaf_data(leaf) + \
2156 btrfs_item_offset_nr(leaf, slot)))
2158 #define btrfs_item_ptr_offset(leaf, slot) \
2159 ((unsigned long)(btrfs_leaf_data(leaf) + \
2160 btrfs_item_offset_nr(leaf, slot)))
2163 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2164 struct btrfs_root
*root
,
2165 u64 num_bytes
, u64 empty_size
,
2166 u64 hint_byte
, u64 search_end
,
2167 struct btrfs_key
*ins
, int data
);
2168 int btrfs_fix_block_accounting(struct btrfs_trans_handle
*trans
,
2169 struct btrfs_root
*root
);
2170 void btrfs_pin_extent(struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 num_bytes
);
2171 void btrfs_unpin_extent(struct btrfs_fs_info
*fs_info
,
2172 u64 bytenr
, u64 num_bytes
);
2173 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
2174 struct btrfs_root
*root
);
2175 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
2176 btrfs_fs_info
*info
,
2178 struct btrfs_block_group_cache
*btrfs_lookup_first_block_group(struct
2179 btrfs_fs_info
*info
,
2181 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2182 struct btrfs_root
*root
,
2183 u32 blocksize
, u64 root_objectid
,
2184 struct btrfs_disk_key
*key
, int level
,
2185 u64 hint
, u64 empty_size
);
2186 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
2187 struct btrfs_root
*root
,
2188 u64 num_bytes
, u64 parent
,
2189 u64 root_objectid
, u64 ref_generation
,
2190 u64 owner
, u64 empty_size
, u64 hint_byte
,
2191 u64 search_end
, struct btrfs_key
*ins
, int data
);
2192 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2193 struct btrfs_root
*root
, u64 bytenr
,
2194 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2195 int btrfs_set_block_flags(struct btrfs_trans_handle
*trans
,
2196 struct btrfs_root
*root
,
2197 u64 bytenr
, int level
, u64 flags
);
2198 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2199 struct extent_buffer
*buf
, int record_parent
);
2200 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2201 struct extent_buffer
*buf
, int record_parent
);
2202 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2203 struct btrfs_root
*root
,
2204 u64 bytenr
, u64 num_bytes
, u64 parent
,
2205 u64 root_objectid
, u64 owner
, u64 offset
);
2206 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2207 struct btrfs_root
*root
,
2208 struct extent_io_tree
*unpin
);
2209 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2210 struct btrfs_root
*root
,
2211 u64 bytenr
, u64 num_bytes
, u64 parent
,
2212 u64 root_objectid
, u64 ref_generation
,
2213 u64 owner_objectid
);
2214 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
2215 struct btrfs_root
*root
, u64 bytenr
,
2216 u64 orig_parent
, u64 parent
,
2217 u64 root_objectid
, u64 ref_generation
,
2218 u64 owner_objectid
);
2219 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2220 struct btrfs_root
*root
);
2221 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2222 int btrfs_read_block_groups(struct btrfs_root
*root
);
2223 struct btrfs_block_group_cache
*
2224 btrfs_add_block_group(struct btrfs_fs_info
*fs_info
, u64 bytes_used
, u64 type
,
2225 u64 chunk_objectid
, u64 chunk_offset
, u64 size
);
2226 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2227 struct btrfs_root
*root
, u64 bytes_used
,
2228 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2230 int btrfs_make_block_groups(struct btrfs_trans_handle
*trans
,
2231 struct btrfs_root
*root
);
2232 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
2233 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
2234 int alloc
, int mark_free
);
2235 int btrfs_record_file_extent(struct btrfs_trans_handle
*trans
,
2236 struct btrfs_root
*root
, u64 objectid
,
2237 struct btrfs_inode_item
*inode
,
2238 u64 file_pos
, u64 disk_bytenr
,
2241 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2242 int btrfs_del_ptr(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2243 struct btrfs_path
*path
, int level
, int slot
);
2244 enum btrfs_tree_block_status
2245 btrfs_check_node(struct btrfs_root
*root
, struct btrfs_disk_key
*parent_key
,
2246 struct extent_buffer
*buf
);
2247 enum btrfs_tree_block_status
2248 btrfs_check_leaf(struct btrfs_root
*root
, struct btrfs_disk_key
*parent_key
,
2249 struct extent_buffer
*buf
);
2250 void reada_for_search(struct btrfs_root
*root
, struct btrfs_path
*path
,
2251 int level
, int slot
, u64 objectid
);
2252 struct extent_buffer
*read_node_slot(struct btrfs_root
*root
,
2253 struct extent_buffer
*parent
, int slot
);
2254 int btrfs_previous_item(struct btrfs_root
*root
,
2255 struct btrfs_path
*path
, u64 min_objectid
,
2257 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2258 struct btrfs_path
*path
, u64 min_objectid
);
2259 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2260 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2261 struct extent_buffer
*parent
, int parent_slot
,
2262 struct extent_buffer
**cow_ret
);
2263 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2264 struct btrfs_root
*root
,
2265 struct extent_buffer
*buf
,
2266 struct extent_buffer
*parent
, int parent_slot
,
2267 struct extent_buffer
**cow_ret
,
2268 u64 search_start
, u64 empty_size
);
2269 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2270 struct btrfs_root
*root
,
2271 struct extent_buffer
*buf
,
2272 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2273 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2274 *root
, struct btrfs_path
*path
, u32 data_size
);
2275 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2276 struct btrfs_root
*root
,
2277 struct btrfs_path
*path
,
2278 u32 new_size
, int from_end
);
2279 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2280 struct btrfs_root
*root
,
2281 struct btrfs_path
*path
,
2282 struct btrfs_key
*new_key
,
2283 unsigned long split_offset
);
2284 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2285 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2287 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*found_path
,
2288 u64 iobjectid
, u64 ioff
, u8 key_type
,
2289 struct btrfs_key
*found_key
);
2290 void btrfs_release_path(struct btrfs_path
*p
);
2291 void add_root_to_dirty_list(struct btrfs_root
*root
);
2292 struct btrfs_path
*btrfs_alloc_path(void);
2293 void btrfs_free_path(struct btrfs_path
*p
);
2294 void btrfs_init_path(struct btrfs_path
*p
);
2295 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2296 struct btrfs_path
*path
, int slot
, int nr
);
2298 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2299 struct btrfs_root
*root
,
2300 struct btrfs_path
*path
)
2302 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2305 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2306 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2307 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2308 struct btrfs_root
*root
,
2309 struct btrfs_path
*path
,
2310 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2312 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2313 struct btrfs_root
*root
,
2314 struct btrfs_path
*path
,
2315 struct btrfs_key
*key
,
2318 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2321 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2322 static inline int btrfs_next_item(struct btrfs_root
*root
,
2323 struct btrfs_path
*p
)
2326 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2327 return btrfs_next_leaf(root
, p
);
2331 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2332 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2333 void btrfs_fixup_low_keys(struct btrfs_root
*root
, struct btrfs_path
*path
,
2334 struct btrfs_disk_key
*key
, int level
);
2335 int btrfs_set_item_key_safe(struct btrfs_root
*root
, struct btrfs_path
*path
,
2336 struct btrfs_key
*new_key
);
2337 void btrfs_set_item_key_unsafe(struct btrfs_root
*root
,
2338 struct btrfs_path
*path
,
2339 struct btrfs_key
*new_key
);
2342 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2343 struct btrfs_root
*tree_root
,
2344 u64 root_id
, u8 type
, u64 ref_id
,
2345 u64 dirid
, u64 sequence
,
2346 const char *name
, int name_len
);
2347 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2348 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2350 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2351 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2353 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2354 btrfs_root_item
*item
, struct btrfs_key
*key
);
2356 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2357 *root
, const char *name
, int name_len
, u64 dir
,
2358 struct btrfs_key
*location
, u8 type
, u64 index
);
2359 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2360 struct btrfs_root
*root
,
2361 struct btrfs_path
*path
, u64 dir
,
2362 const char *name
, int name_len
,
2364 struct btrfs_dir_item
*btrfs_lookup_dir_index(struct btrfs_trans_handle
*trans
,
2365 struct btrfs_root
*root
,
2366 struct btrfs_path
*path
, u64 dir
,
2367 const char *name
, int name_len
,
2368 u64 index
, int mod
);
2369 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2370 struct btrfs_root
*root
,
2371 struct btrfs_path
*path
,
2372 struct btrfs_dir_item
*di
);
2373 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2374 struct btrfs_root
*root
, const char *name
,
2375 u16 name_len
, const void *data
, u16 data_len
,
2378 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2379 struct btrfs_root
*fs_root
,
2380 u64 dirid
, u64
*objectid
);
2383 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2384 struct btrfs_root
*root
,
2385 const char *name
, int name_len
,
2386 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2387 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2388 *root
, u64 objectid
, struct btrfs_inode_item
2390 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2391 *root
, struct btrfs_path
*path
,
2392 struct btrfs_key
*location
, int mod
);
2395 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2396 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2397 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2398 struct btrfs_root
*root
,
2399 u64 objectid
, u64 pos
, u64 offset
,
2402 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
2403 struct btrfs_root
*root
, u64 objectid
,
2404 u64 offset
, char *buffer
, size_t size
);
2405 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
2406 struct btrfs_root
*root
, u64 alloc_end
,
2407 u64 bytenr
, char *data
, size_t len
);
2408 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2409 struct btrfs_root
*root
, struct btrfs_path
*path
,
2413 int btrfs_lookup_uuid_subvol_item(int fd
, const u8
*uuid
, u64
*subvol_id
);
2414 int btrfs_lookup_uuid_received_subvol_item(int fd
, const u8
*uuid
,
2417 static inline int is_fstree(u64 rootid
)
2419 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
2420 (signed long long)rootid
>= (signed long long)BTRFS_FIRST_FREE_OBJECTID
)