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
849 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
850 BTRFS_BLOCK_GROUP_SYSTEM | \
851 BTRFS_BLOCK_GROUP_METADATA)
853 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
854 BTRFS_BLOCK_GROUP_RAID1 | \
855 BTRFS_BLOCK_GROUP_RAID5 | \
856 BTRFS_BLOCK_GROUP_RAID6 | \
857 BTRFS_BLOCK_GROUP_DUP | \
858 BTRFS_BLOCK_GROUP_RAID10)
860 /* used in struct btrfs_balance_args fields */
861 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
864 * GLOBAL_RSV does not exist as a on-disk block group type and is used
865 * internally for exporting info about global block reserve from space infos
867 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
869 #define BTRFS_QGROUP_STATUS_OFF 0
870 #define BTRFS_QGROUP_STATUS_ON 1
871 #define BTRFS_QGROUP_STATUS_SCANNING 2
873 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1 << 0)
875 struct btrfs_qgroup_status_item
{
879 __le64 scan
; /* progress during scanning */
880 } __attribute__ ((__packed__
));
882 struct btrfs_block_group_item
{
884 __le64 chunk_objectid
;
886 } __attribute__ ((__packed__
));
888 struct btrfs_qgroup_info_item
{
891 __le64 referenced_compressed
;
893 __le64 exclusive_compressed
;
894 } __attribute__ ((__packed__
));
896 /* flags definition for qgroup limits */
897 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
898 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
899 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
900 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
901 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
902 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
904 struct btrfs_qgroup_limit_item
{
906 __le64 max_referenced
;
907 __le64 max_exclusive
;
908 __le64 rsv_referenced
;
909 __le64 rsv_exclusive
;
910 } __attribute__ ((__packed__
));
912 struct btrfs_space_info
{
918 struct list_head list
;
921 struct btrfs_block_group_cache
{
922 struct cache_extent cache
;
923 struct btrfs_key key
;
924 struct btrfs_block_group_item item
;
925 struct btrfs_space_info
*space_info
;
926 struct btrfs_free_space_ctl
*free_space_ctl
;
933 struct btrfs_extent_ops
{
934 int (*alloc_extent
)(struct btrfs_root
*root
, u64 num_bytes
,
935 u64 hint_byte
, struct btrfs_key
*ins
);
936 int (*free_extent
)(struct btrfs_root
*root
, u64 bytenr
,
941 struct btrfs_fs_devices
;
942 struct btrfs_fs_info
{
943 u8 fsid
[BTRFS_FSID_SIZE
];
944 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
945 struct btrfs_root
*fs_root
;
946 struct btrfs_root
*extent_root
;
947 struct btrfs_root
*tree_root
;
948 struct btrfs_root
*chunk_root
;
949 struct btrfs_root
*dev_root
;
950 struct btrfs_root
*csum_root
;
951 struct btrfs_root
*quota_root
;
953 struct rb_root fs_root_tree
;
955 /* the log root tree is a directory of all the other log roots */
956 struct btrfs_root
*log_root_tree
;
958 struct extent_io_tree extent_cache
;
959 struct extent_io_tree free_space_cache
;
960 struct extent_io_tree block_group_cache
;
961 struct extent_io_tree pinned_extents
;
962 struct extent_io_tree pending_del
;
963 struct extent_io_tree extent_ins
;
965 /* logical->physical extent mapping */
966 struct btrfs_mapping_tree mapping_tree
;
969 u64 last_trans_committed
;
971 u64 avail_data_alloc_bits
;
972 u64 avail_metadata_alloc_bits
;
973 u64 avail_system_alloc_bits
;
974 u64 data_alloc_profile
;
975 u64 metadata_alloc_profile
;
976 u64 system_alloc_profile
;
979 struct btrfs_trans_handle
*running_transaction
;
980 struct btrfs_super_block
*super_copy
;
981 struct mutex fs_mutex
;
986 struct btrfs_extent_ops
*extent_ops
;
987 struct list_head dirty_cowonly_roots
;
988 struct list_head recow_ebs
;
990 struct btrfs_fs_devices
*fs_devices
;
991 struct list_head space_info
;
994 unsigned int readonly
:1;
995 unsigned int on_restoring
:1;
996 unsigned int is_chunk_recover
:1;
997 unsigned int quota_enabled
:1;
999 int (*free_extent_hook
)(struct btrfs_trans_handle
*trans
,
1000 struct btrfs_root
*root
,
1001 u64 bytenr
, u64 num_bytes
, u64 parent
,
1002 u64 root_objectid
, u64 owner
, u64 offset
,
1004 struct cache_tree
*fsck_extent_cache
;
1005 struct cache_tree
*corrupt_blocks
;
1009 * in ram representation of the tree. extent_root is used for all allocations
1010 * and for the extent tree extent_root root.
1013 struct extent_buffer
*node
;
1014 struct extent_buffer
*commit_root
;
1015 struct btrfs_root_item root_item
;
1016 struct btrfs_key root_key
;
1017 struct btrfs_fs_info
*fs_info
;
1021 /* data allocations are done in sectorsize units */
1024 /* node allocations are done in nodesize units */
1027 /* leaf allocations are done in leafsize units */
1030 /* leaf allocations are done in leafsize units */
1039 u64 last_inode_alloc
;
1041 /* the dirty list is only used by non-reference counted roots */
1042 struct list_head dirty_list
;
1043 struct rb_node rb_node
;
1047 * inode items have the data typically returned from stat and store other
1048 * info about object characteristics. There is one for every file and dir in
1051 #define BTRFS_INODE_ITEM_KEY 1
1052 #define BTRFS_INODE_REF_KEY 12
1053 #define BTRFS_INODE_EXTREF_KEY 13
1054 #define BTRFS_XATTR_ITEM_KEY 24
1055 #define BTRFS_ORPHAN_ITEM_KEY 48
1057 #define BTRFS_DIR_LOG_ITEM_KEY 60
1058 #define BTRFS_DIR_LOG_INDEX_KEY 72
1060 * dir items are the name -> inode pointers in a directory. There is one
1061 * for every name in a directory.
1063 #define BTRFS_DIR_ITEM_KEY 84
1064 #define BTRFS_DIR_INDEX_KEY 96
1067 * extent data is for file data
1069 #define BTRFS_EXTENT_DATA_KEY 108
1072 * csum items have the checksums for data in the extents
1074 #define BTRFS_CSUM_ITEM_KEY 120
1076 * extent csums are stored in a separate tree and hold csums for
1077 * an entire extent on disk.
1079 #define BTRFS_EXTENT_CSUM_KEY 128
1082 * root items point to tree roots. There are typically in the root
1083 * tree used by the super block to find all the other trees
1085 #define BTRFS_ROOT_ITEM_KEY 132
1088 * root backrefs tie subvols and snapshots to the directory entries that
1091 #define BTRFS_ROOT_BACKREF_KEY 144
1094 * root refs make a fast index for listing all of the snapshots and
1095 * subvolumes referenced by a given root. They point directly to the
1096 * directory item in the root that references the subvol
1098 #define BTRFS_ROOT_REF_KEY 156
1101 * extent items are in the extent map tree. These record which blocks
1102 * are used, and how many references there are to each block
1104 #define BTRFS_EXTENT_ITEM_KEY 168
1107 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1108 * the length, so we save the level in key->offset instead of the length.
1110 #define BTRFS_METADATA_ITEM_KEY 169
1112 #define BTRFS_TREE_BLOCK_REF_KEY 176
1114 #define BTRFS_EXTENT_DATA_REF_KEY 178
1116 /* old style extent backrefs */
1117 #define BTRFS_EXTENT_REF_V0_KEY 180
1119 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1121 #define BTRFS_SHARED_DATA_REF_KEY 184
1125 * block groups give us hints into the extent allocation trees. Which
1126 * blocks are free etc etc
1128 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1130 #define BTRFS_DEV_EXTENT_KEY 204
1131 #define BTRFS_DEV_ITEM_KEY 216
1132 #define BTRFS_CHUNK_ITEM_KEY 228
1134 #define BTRFS_BALANCE_ITEM_KEY 248
1139 #define BTRFS_QGROUP_STATUS_KEY 240
1140 #define BTRFS_QGROUP_INFO_KEY 242
1141 #define BTRFS_QGROUP_LIMIT_KEY 244
1142 #define BTRFS_QGROUP_RELATION_KEY 246
1145 * Persistently stores the io stats in the device tree.
1146 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1148 #define BTRFS_DEV_STATS_KEY 249
1151 * Persistently stores the device replace state in the device tree.
1152 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1154 #define BTRFS_DEV_REPLACE_KEY 250
1157 * Stores items that allow to quickly map UUIDs to something else.
1158 * These items are part of the filesystem UUID tree.
1159 * The key is built like this:
1160 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1162 #if BTRFS_UUID_SIZE != 16
1163 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1165 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1166 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1167 * received subvols */
1170 * string items are for debugging. They just store a short string of
1173 #define BTRFS_STRING_ITEM_KEY 253
1177 #define BTRFS_INODE_NODATASUM (1 << 0)
1178 #define BTRFS_INODE_NODATACOW (1 << 1)
1179 #define BTRFS_INODE_READONLY (1 << 2)
1181 #define read_eb_member(eb, ptr, type, member, result) ( \
1182 read_extent_buffer(eb, (char *)(result), \
1183 ((unsigned long)(ptr)) + \
1184 offsetof(type, member), \
1185 sizeof(((type *)0)->member)))
1187 #define write_eb_member(eb, ptr, type, member, result) ( \
1188 write_extent_buffer(eb, (char *)(result), \
1189 ((unsigned long)(ptr)) + \
1190 offsetof(type, member), \
1191 sizeof(((type *)0)->member)))
1193 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1194 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1196 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1197 return le##bits##_to_cpu(h->member); \
1199 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1202 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1203 h->member = cpu_to_le##bits(val); \
1206 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1207 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1210 unsigned long offset = (unsigned long)s; \
1211 const type *p = (type *) (eb->data + offset); \
1212 return get_unaligned_le##bits(&p->member); \
1214 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1215 type *s, u##bits val) \
1217 unsigned long offset = (unsigned long)s; \
1218 type *p = (type *) (eb->data + offset); \
1219 put_unaligned_le##bits(val, &p->member); \
1222 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1223 static inline u##bits btrfs_##name(const type *s) \
1225 return le##bits##_to_cpu(s->member); \
1227 static inline void btrfs_set_##name(type *s, u##bits val) \
1229 s->member = cpu_to_le##bits(val); \
1232 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1233 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1234 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1235 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1236 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1237 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1239 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1240 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1241 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1242 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1243 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1244 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1246 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1247 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1249 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1251 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1253 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1255 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1257 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1258 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1260 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1262 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1264 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1267 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1269 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1272 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1274 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1277 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1278 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1279 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1280 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1281 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1282 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1283 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1284 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1285 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1286 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1287 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1289 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1291 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1294 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1295 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1296 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1298 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1300 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1302 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1304 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1305 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1307 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1309 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1310 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1312 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1315 unsigned long offset
= (unsigned long)c
;
1316 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1317 offset
+= nr
* sizeof(struct btrfs_stripe
);
1318 return (struct btrfs_stripe
*)offset
;
1321 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1323 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1326 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1327 struct btrfs_chunk
*c
, int nr
)
1329 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1332 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1333 struct btrfs_chunk
*c
, int nr
,
1336 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1339 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1340 struct btrfs_chunk
*c
, int nr
)
1342 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1345 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1346 struct btrfs_chunk
*c
, int nr
,
1349 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1352 /* struct btrfs_block_group_item */
1353 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1355 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1357 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1358 struct btrfs_block_group_item
, chunk_objectid
, 64);
1360 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1361 struct btrfs_block_group_item
, chunk_objectid
, 64);
1362 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1363 struct btrfs_block_group_item
, flags
, 64);
1364 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1365 struct btrfs_block_group_item
, flags
, 64);
1367 /* struct btrfs_inode_ref */
1368 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1369 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1370 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1372 /* struct btrfs_inode_extref */
1373 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1374 parent_objectid
, 64);
1375 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1377 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1379 /* struct btrfs_inode_item */
1380 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1381 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1382 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1383 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1384 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1385 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1386 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1387 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1388 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1389 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1390 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1391 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1393 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
1394 struct btrfs_inode_item
, generation
, 64);
1395 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
,
1396 struct btrfs_inode_item
, generation
, 64);
1397 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
1398 struct btrfs_inode_item
, size
, 64);
1399 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
,
1400 struct btrfs_inode_item
, nbytes
, 64);
1401 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
1402 struct btrfs_inode_item
, block_group
, 64);
1403 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
1404 struct btrfs_inode_item
, nlink
, 32);
1405 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
1406 struct btrfs_inode_item
, uid
, 32);
1407 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
1408 struct btrfs_inode_item
, gid
, 32);
1409 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
1410 struct btrfs_inode_item
, mode
, 32);
1411 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
1412 struct btrfs_inode_item
, rdev
, 64);
1413 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
1414 struct btrfs_inode_item
, flags
, 64);
1416 static inline struct btrfs_timespec
*
1417 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1419 unsigned long ptr
= (unsigned long)inode_item
;
1420 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1421 return (struct btrfs_timespec
*)ptr
;
1424 static inline struct btrfs_timespec
*
1425 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1427 unsigned long ptr
= (unsigned long)inode_item
;
1428 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1429 return (struct btrfs_timespec
*)ptr
;
1432 static inline struct btrfs_timespec
*
1433 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1435 unsigned long ptr
= (unsigned long)inode_item
;
1436 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1437 return (struct btrfs_timespec
*)ptr
;
1440 static inline struct btrfs_timespec
*
1441 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1443 unsigned long ptr
= (unsigned long)inode_item
;
1444 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1445 return (struct btrfs_timespec
*)ptr
;
1448 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1449 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1450 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
1452 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
1455 /* struct btrfs_dev_extent */
1456 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1458 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1459 chunk_objectid
, 64);
1460 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1462 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1464 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1466 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1467 return (u8
*)((unsigned long)dev
+ ptr
);
1471 /* struct btrfs_extent_item */
1472 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1473 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
, refs
, 64);
1474 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1476 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1477 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags
, struct btrfs_extent_item
, flags
, 64);
1479 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1481 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1483 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1484 struct btrfs_tree_block_info
*item
,
1485 struct btrfs_disk_key
*key
)
1487 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1490 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1491 struct btrfs_tree_block_info
*item
,
1492 struct btrfs_disk_key
*key
)
1494 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1497 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1499 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1501 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1503 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1506 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1509 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1511 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1513 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type
,
1514 struct btrfs_extent_inline_ref
, type
, 8);
1515 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset
,
1516 struct btrfs_extent_inline_ref
, offset
, 64);
1518 static inline u32
btrfs_extent_inline_ref_size(int type
)
1520 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1521 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1522 return sizeof(struct btrfs_extent_inline_ref
);
1523 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1524 return sizeof(struct btrfs_shared_data_ref
) +
1525 sizeof(struct btrfs_extent_inline_ref
);
1526 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1527 return sizeof(struct btrfs_extent_data_ref
) +
1528 offsetof(struct btrfs_extent_inline_ref
, offset
);
1533 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1534 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1536 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1537 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1539 /* struct btrfs_node */
1540 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1541 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1543 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1546 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1547 sizeof(struct btrfs_key_ptr
) * nr
;
1548 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1551 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1555 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1556 sizeof(struct btrfs_key_ptr
) * nr
;
1557 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1560 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1563 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1564 sizeof(struct btrfs_key_ptr
) * nr
;
1565 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1568 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1572 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1573 sizeof(struct btrfs_key_ptr
) * nr
;
1574 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1577 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1579 return offsetof(struct btrfs_node
, ptrs
) +
1580 sizeof(struct btrfs_key_ptr
) * nr
;
1583 static inline void btrfs_node_key(struct extent_buffer
*eb
,
1584 struct btrfs_disk_key
*disk_key
, int nr
)
1587 ptr
= btrfs_node_key_ptr_offset(nr
);
1588 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1589 struct btrfs_key_ptr
, key
, disk_key
);
1592 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1593 struct btrfs_disk_key
*disk_key
, int nr
)
1596 ptr
= btrfs_node_key_ptr_offset(nr
);
1597 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1598 struct btrfs_key_ptr
, key
, disk_key
);
1601 /* struct btrfs_item */
1602 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1603 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1605 static inline unsigned long btrfs_item_nr_offset(int nr
)
1607 return offsetof(struct btrfs_leaf
, items
) +
1608 sizeof(struct btrfs_item
) * nr
;
1611 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1613 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1616 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1617 struct btrfs_item
*item
)
1619 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1622 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1624 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
1627 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1629 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
1632 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1634 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
1637 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1638 struct btrfs_disk_key
*disk_key
, int nr
)
1640 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1641 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1644 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1645 struct btrfs_disk_key
*disk_key
, int nr
)
1647 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1648 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1651 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1654 * struct btrfs_root_ref
1656 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1657 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1658 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1660 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1661 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1662 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1664 /* struct btrfs_dir_item */
1665 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1666 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1667 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1668 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1670 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1672 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1673 struct btrfs_dir_item
*item
,
1674 struct btrfs_disk_key
*key
)
1676 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1679 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1680 struct btrfs_dir_item
*item
,
1681 struct btrfs_disk_key
*key
)
1683 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1686 /* struct btrfs_free_space_header */
1687 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1689 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1691 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1694 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1695 struct btrfs_free_space_header
*h
,
1696 struct btrfs_disk_key
*key
)
1698 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1701 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1702 struct btrfs_free_space_header
*h
,
1703 struct btrfs_disk_key
*key
)
1705 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1708 /* struct btrfs_disk_key */
1709 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1711 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1712 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1714 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1715 struct btrfs_disk_key
*disk
)
1717 cpu
->offset
= le64_to_cpu(disk
->offset
);
1718 cpu
->type
= disk
->type
;
1719 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1722 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1723 struct btrfs_key
*cpu
)
1725 disk
->offset
= cpu_to_le64(cpu
->offset
);
1726 disk
->type
= cpu
->type
;
1727 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1730 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1731 struct btrfs_key
*key
, int nr
)
1733 struct btrfs_disk_key disk_key
;
1734 btrfs_node_key(eb
, &disk_key
, nr
);
1735 btrfs_disk_key_to_cpu(key
, &disk_key
);
1738 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1739 struct btrfs_key
*key
, int nr
)
1741 struct btrfs_disk_key disk_key
;
1742 btrfs_item_key(eb
, &disk_key
, nr
);
1743 btrfs_disk_key_to_cpu(key
, &disk_key
);
1746 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1747 struct btrfs_dir_item
*item
,
1748 struct btrfs_key
*key
)
1750 struct btrfs_disk_key disk_key
;
1751 btrfs_dir_item_key(eb
, item
, &disk_key
);
1752 btrfs_disk_key_to_cpu(key
, &disk_key
);
1756 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1761 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1766 /* struct btrfs_header */
1767 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1768 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1770 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1771 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1772 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1773 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1774 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
1775 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
, nritems
,
1777 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
1778 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
1781 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1783 return (btrfs_header_flags(eb
) & flag
) == flag
;
1786 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1788 u64 flags
= btrfs_header_flags(eb
);
1789 btrfs_set_header_flags(eb
, flags
| flag
);
1790 return (flags
& flag
) == flag
;
1793 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1795 u64 flags
= btrfs_header_flags(eb
);
1796 btrfs_set_header_flags(eb
, flags
& ~flag
);
1797 return (flags
& flag
) == flag
;
1800 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1802 u64 flags
= btrfs_header_flags(eb
);
1803 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1806 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1809 u64 flags
= btrfs_header_flags(eb
);
1810 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1811 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1812 btrfs_set_header_flags(eb
, flags
);
1815 static inline unsigned long btrfs_header_fsid(void)
1817 return offsetof(struct btrfs_header
, fsid
);
1820 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1822 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
1825 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1827 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1831 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1833 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1837 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1842 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1847 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1852 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1854 return (btrfs_header_level(eb
) == 0);
1857 /* struct btrfs_root_item */
1858 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1860 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1861 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1862 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1864 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1866 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1867 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1868 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1869 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1870 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1871 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1872 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1873 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1875 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
1877 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
1879 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
1881 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
1883 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
1886 /* struct btrfs_root_backup */
1887 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
1889 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
1891 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
1892 tree_root_level
, 8);
1894 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
1896 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
1897 chunk_root_gen
, 64);
1898 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
1899 chunk_root_level
, 8);
1901 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
1903 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
1904 extent_root_gen
, 64);
1905 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
1906 extent_root_level
, 8);
1908 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
1910 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
1912 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
1915 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
1917 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
1919 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
1922 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
1924 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
1926 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
1927 csum_root_level
, 8);
1928 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
1930 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
1932 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
1935 /* struct btrfs_super_block */
1937 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1938 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1939 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1941 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1942 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1943 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1944 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1945 struct btrfs_super_block
, chunk_root_generation
, 64);
1946 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1948 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1950 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1951 chunk_root_level
, 8);
1952 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1954 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1955 log_root_transid
, 64);
1956 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1958 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1960 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1962 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1964 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1966 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1968 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1970 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1971 root_dir_objectid
, 64);
1972 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1974 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1976 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1977 compat_ro_flags
, 64);
1978 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1979 incompat_flags
, 64);
1980 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1982 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
1983 cache_generation
, 64);
1984 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
1985 uuid_tree_generation
, 64);
1986 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
1988 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1990 int t
= btrfs_super_csum_type(s
);
1991 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1992 return btrfs_csum_sizes
[t
];
1995 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1997 return offsetof(struct btrfs_leaf
, items
);
2000 /* struct btrfs_file_extent_item */
2001 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2002 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2004 static inline unsigned long btrfs_file_extent_inline_start(struct
2005 btrfs_file_extent_item
*e
)
2007 unsigned long offset
= (unsigned long)e
;
2008 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2012 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2014 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2017 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2019 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2021 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2023 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
, struct btrfs_file_extent_item
,
2025 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2026 disk_num_bytes
, 64);
2027 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2029 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
, struct btrfs_file_extent_item
,
2031 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2033 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
, struct btrfs_file_extent_item
,
2035 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2037 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2039 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2041 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
, struct btrfs_file_extent_item
,
2043 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2045 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2046 other_encoding
, 16);
2048 /* btrfs_qgroup_status_item */
2049 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2051 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2053 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2055 BTRFS_SETGET_FUNCS(qgroup_status_scan
, struct btrfs_qgroup_status_item
,
2058 /* btrfs_qgroup_info_item */
2059 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2061 BTRFS_SETGET_FUNCS(qgroup_info_referenced
, struct btrfs_qgroup_info_item
,
2063 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed
,
2064 struct btrfs_qgroup_info_item
, referenced_compressed
, 64);
2065 BTRFS_SETGET_FUNCS(qgroup_info_exclusive
, struct btrfs_qgroup_info_item
,
2067 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed
,
2068 struct btrfs_qgroup_info_item
, exclusive_compressed
, 64);
2070 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2071 struct btrfs_qgroup_info_item
, generation
, 64);
2072 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced
,
2073 struct btrfs_qgroup_info_item
, referenced
, 64);
2074 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed
,
2075 struct btrfs_qgroup_info_item
, referenced_compressed
, 64);
2076 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive
,
2077 struct btrfs_qgroup_info_item
, exclusive
, 64);
2078 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed
,
2079 struct btrfs_qgroup_info_item
, exclusive_compressed
, 64);
2081 /* btrfs_qgroup_limit_item */
2082 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2084 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced
, struct btrfs_qgroup_limit_item
,
2085 max_referenced
, 64);
2086 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive
, struct btrfs_qgroup_limit_item
,
2088 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced
, struct btrfs_qgroup_limit_item
,
2089 rsv_referenced
, 64);
2090 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive
, struct btrfs_qgroup_limit_item
,
2093 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags
,
2094 struct btrfs_qgroup_limit_item
, flags
, 64);
2095 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced
,
2096 struct btrfs_qgroup_limit_item
, max_referenced
, 64);
2097 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive
,
2098 struct btrfs_qgroup_limit_item
, max_exclusive
, 64);
2099 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced
,
2100 struct btrfs_qgroup_limit_item
, rsv_referenced
, 64);
2101 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive
,
2102 struct btrfs_qgroup_limit_item
, rsv_exclusive
, 64);
2105 * this returns the number of bytes used by the item on disk, minus the
2106 * size of any extent headers. If a file is compressed on disk, this is
2107 * the compressed size
2109 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2110 struct btrfs_item
*e
)
2112 unsigned long offset
;
2113 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2114 return btrfs_item_size(eb
, e
) - offset
;
2117 /* this returns the number of file bytes represented by the inline item.
2118 * If an item is compressed, this is the uncompressed size
2120 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2122 struct btrfs_file_extent_item
*fi
)
2125 * return the space used on disk if this item isn't
2126 * compressed or encoded
2128 if (btrfs_file_extent_compression(eb
, fi
) == 0 &&
2129 btrfs_file_extent_encryption(eb
, fi
) == 0 &&
2130 btrfs_file_extent_other_encoding(eb
, fi
) == 0) {
2131 return btrfs_file_extent_inline_item_len(eb
,
2132 btrfs_item_nr(slot
));
2135 /* otherwise use the ram bytes field */
2136 return btrfs_file_extent_ram_bytes(eb
, fi
);
2139 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
2141 return root
->leafsize
;
2142 return root
->nodesize
;
2145 static inline int btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
2147 struct btrfs_super_block
*disk_super
;
2148 disk_super
= fs_info
->super_copy
;
2149 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
2152 /* helper function to cast into the data area of the leaf. */
2153 #define btrfs_item_ptr(leaf, slot, type) \
2154 ((type *)(btrfs_leaf_data(leaf) + \
2155 btrfs_item_offset_nr(leaf, slot)))
2157 #define btrfs_item_ptr_offset(leaf, slot) \
2158 ((unsigned long)(btrfs_leaf_data(leaf) + \
2159 btrfs_item_offset_nr(leaf, slot)))
2162 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2163 struct btrfs_root
*root
,
2164 u64 num_bytes
, u64 empty_size
,
2165 u64 hint_byte
, u64 search_end
,
2166 struct btrfs_key
*ins
, int data
);
2167 int btrfs_fix_block_accounting(struct btrfs_trans_handle
*trans
,
2168 struct btrfs_root
*root
);
2169 void btrfs_pin_extent(struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 num_bytes
);
2170 void btrfs_unpin_extent(struct btrfs_fs_info
*fs_info
,
2171 u64 bytenr
, u64 num_bytes
);
2172 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
2173 struct btrfs_root
*root
);
2174 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
2175 btrfs_fs_info
*info
,
2177 struct btrfs_block_group_cache
*btrfs_lookup_first_block_group(struct
2178 btrfs_fs_info
*info
,
2180 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2181 struct btrfs_root
*root
,
2182 u32 blocksize
, u64 root_objectid
,
2183 struct btrfs_disk_key
*key
, int level
,
2184 u64 hint
, u64 empty_size
);
2185 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
2186 struct btrfs_root
*root
,
2187 u64 num_bytes
, u64 parent
,
2188 u64 root_objectid
, u64 ref_generation
,
2189 u64 owner
, u64 empty_size
, u64 hint_byte
,
2190 u64 search_end
, struct btrfs_key
*ins
, int data
);
2191 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2192 struct btrfs_root
*root
, u64 bytenr
,
2193 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2194 int btrfs_set_block_flags(struct btrfs_trans_handle
*trans
,
2195 struct btrfs_root
*root
,
2196 u64 bytenr
, int level
, u64 flags
);
2197 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2198 struct extent_buffer
*buf
, int record_parent
);
2199 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2200 struct extent_buffer
*buf
, int record_parent
);
2201 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2202 struct btrfs_root
*root
,
2203 u64 bytenr
, u64 num_bytes
, u64 parent
,
2204 u64 root_objectid
, u64 owner
, u64 offset
);
2205 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2206 struct btrfs_root
*root
,
2207 struct extent_io_tree
*unpin
);
2208 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2209 struct btrfs_root
*root
,
2210 u64 bytenr
, u64 num_bytes
, u64 parent
,
2211 u64 root_objectid
, u64 ref_generation
,
2212 u64 owner_objectid
);
2213 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
2214 struct btrfs_root
*root
, u64 bytenr
,
2215 u64 orig_parent
, u64 parent
,
2216 u64 root_objectid
, u64 ref_generation
,
2217 u64 owner_objectid
);
2218 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2219 struct btrfs_root
*root
);
2220 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2221 int btrfs_read_block_groups(struct btrfs_root
*root
);
2222 struct btrfs_block_group_cache
*
2223 btrfs_add_block_group(struct btrfs_fs_info
*fs_info
, u64 bytes_used
, u64 type
,
2224 u64 chunk_objectid
, u64 chunk_offset
, u64 size
);
2225 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2226 struct btrfs_root
*root
, u64 bytes_used
,
2227 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2229 int btrfs_make_block_groups(struct btrfs_trans_handle
*trans
,
2230 struct btrfs_root
*root
);
2231 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
2232 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
2233 int alloc
, int mark_free
);
2234 int btrfs_record_file_extent(struct btrfs_trans_handle
*trans
,
2235 struct btrfs_root
*root
, u64 objectid
,
2236 struct btrfs_inode_item
*inode
,
2237 u64 file_pos
, u64 disk_bytenr
,
2240 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2241 int btrfs_del_ptr(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2242 struct btrfs_path
*path
, int level
, int slot
);
2243 enum btrfs_tree_block_status
2244 btrfs_check_node(struct btrfs_root
*root
, struct btrfs_disk_key
*parent_key
,
2245 struct extent_buffer
*buf
);
2246 enum btrfs_tree_block_status
2247 btrfs_check_leaf(struct btrfs_root
*root
, struct btrfs_disk_key
*parent_key
,
2248 struct extent_buffer
*buf
);
2249 void reada_for_search(struct btrfs_root
*root
, struct btrfs_path
*path
,
2250 int level
, int slot
, u64 objectid
);
2251 struct extent_buffer
*read_node_slot(struct btrfs_root
*root
,
2252 struct extent_buffer
*parent
, int slot
);
2253 int btrfs_previous_item(struct btrfs_root
*root
,
2254 struct btrfs_path
*path
, u64 min_objectid
,
2256 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2257 struct btrfs_path
*path
, u64 min_objectid
);
2258 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2259 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2260 struct extent_buffer
*parent
, int parent_slot
,
2261 struct extent_buffer
**cow_ret
);
2262 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2263 struct btrfs_root
*root
,
2264 struct extent_buffer
*buf
,
2265 struct extent_buffer
*parent
, int parent_slot
,
2266 struct extent_buffer
**cow_ret
,
2267 u64 search_start
, u64 empty_size
);
2268 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2269 struct btrfs_root
*root
,
2270 struct extent_buffer
*buf
,
2271 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2272 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2273 *root
, struct btrfs_path
*path
, u32 data_size
);
2274 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2275 struct btrfs_root
*root
,
2276 struct btrfs_path
*path
,
2277 u32 new_size
, int from_end
);
2278 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2279 struct btrfs_root
*root
,
2280 struct btrfs_path
*path
,
2281 struct btrfs_key
*new_key
,
2282 unsigned long split_offset
);
2283 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2284 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2286 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*found_path
,
2287 u64 iobjectid
, u64 ioff
, u8 key_type
,
2288 struct btrfs_key
*found_key
);
2289 void btrfs_release_path(struct btrfs_path
*p
);
2290 void add_root_to_dirty_list(struct btrfs_root
*root
);
2291 struct btrfs_path
*btrfs_alloc_path(void);
2292 void btrfs_free_path(struct btrfs_path
*p
);
2293 void btrfs_init_path(struct btrfs_path
*p
);
2294 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2295 struct btrfs_path
*path
, int slot
, int nr
);
2297 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2298 struct btrfs_root
*root
,
2299 struct btrfs_path
*path
)
2301 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2304 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2305 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2306 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2307 struct btrfs_root
*root
,
2308 struct btrfs_path
*path
,
2309 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2311 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2312 struct btrfs_root
*root
,
2313 struct btrfs_path
*path
,
2314 struct btrfs_key
*key
,
2317 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2320 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2321 static inline int btrfs_next_item(struct btrfs_root
*root
,
2322 struct btrfs_path
*p
)
2325 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2326 return btrfs_next_leaf(root
, p
);
2330 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2331 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2332 void btrfs_fixup_low_keys(struct btrfs_root
*root
, struct btrfs_path
*path
,
2333 struct btrfs_disk_key
*key
, int level
);
2334 int btrfs_set_item_key_safe(struct btrfs_root
*root
, struct btrfs_path
*path
,
2335 struct btrfs_key
*new_key
);
2336 void btrfs_set_item_key_unsafe(struct btrfs_root
*root
,
2337 struct btrfs_path
*path
,
2338 struct btrfs_key
*new_key
);
2341 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2342 struct btrfs_root
*tree_root
,
2343 u64 root_id
, u8 type
, u64 ref_id
,
2344 u64 dirid
, u64 sequence
,
2345 const char *name
, int name_len
);
2346 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2347 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2349 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2350 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2352 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2353 btrfs_root_item
*item
, struct btrfs_key
*key
);
2355 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2356 *root
, const char *name
, int name_len
, u64 dir
,
2357 struct btrfs_key
*location
, u8 type
, u64 index
);
2358 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2359 struct btrfs_root
*root
,
2360 struct btrfs_path
*path
, u64 dir
,
2361 const char *name
, int name_len
,
2363 struct btrfs_dir_item
*btrfs_lookup_dir_index(struct btrfs_trans_handle
*trans
,
2364 struct btrfs_root
*root
,
2365 struct btrfs_path
*path
, u64 dir
,
2366 const char *name
, int name_len
,
2367 u64 index
, int mod
);
2368 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2369 struct btrfs_root
*root
,
2370 struct btrfs_path
*path
,
2371 struct btrfs_dir_item
*di
);
2372 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2373 struct btrfs_root
*root
, const char *name
,
2374 u16 name_len
, const void *data
, u16 data_len
,
2377 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2378 struct btrfs_root
*fs_root
,
2379 u64 dirid
, u64
*objectid
);
2382 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2383 struct btrfs_root
*root
,
2384 const char *name
, int name_len
,
2385 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2386 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2387 *root
, u64 objectid
, struct btrfs_inode_item
2389 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2390 *root
, struct btrfs_path
*path
,
2391 struct btrfs_key
*location
, int mod
);
2394 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2395 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2396 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2397 struct btrfs_root
*root
,
2398 u64 objectid
, u64 pos
, u64 offset
,
2401 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
2402 struct btrfs_root
*root
, u64 objectid
,
2403 u64 offset
, char *buffer
, size_t size
);
2404 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
2405 struct btrfs_root
*root
, u64 alloc_end
,
2406 u64 bytenr
, char *data
, size_t len
);
2407 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2408 struct btrfs_root
*root
, struct btrfs_path
*path
,
2412 int btrfs_lookup_uuid_subvol_item(int fd
, const u8
*uuid
, u64
*subvol_id
);
2413 int btrfs_lookup_uuid_received_subvol_item(int fd
, const u8
*uuid
,
2416 static inline int is_fstree(u64 rootid
)
2418 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
2419 (signed long long)rootid
>= (signed long long)BTRFS_FIRST_FREE_OBJECTID
)