2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE_H__
20 #define __BTRFS_CTREE_H__
22 #if BTRFS_FLAT_INCLUDES
24 #include "kerncompat.h"
25 #include "radix-tree.h"
26 #include "extent-cache.h"
27 #include "extent_io.h"
31 #include <btrfs/list.h>
32 #include <btrfs/kerncompat.h>
33 #include <btrfs/radix-tree.h>
34 #include <btrfs/extent-cache.h>
35 #include <btrfs/extent_io.h>
36 #include <btrfs/ioctl.h>
37 #include <linux/sizes.h>
38 #endif /* BTRFS_FLAT_INCLUDES */
41 struct btrfs_trans_handle
;
42 struct btrfs_free_space_ctl
;
43 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
46 * Fake signature for an unfinalized filesystem, structures might be partially
49 #define BTRFS_MAGIC_PARTIAL 0x4D5F536652484221ULL /* ascii !BHRfS_M, no null */
51 #define BTRFS_MAX_MIRRORS 3
53 #define BTRFS_MAX_LEVEL 8
55 #define BTRFS_COMPAT_EXTENT_TREE_V0
57 /* holds pointers to all of the tree roots */
58 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
60 /* stores information about which extents are in use, and reference counts */
61 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
64 * chunk tree stores translations from logical -> physical block numbering
65 * the super block points to the chunk tree
67 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
70 * stores information about which areas of a given device are in use.
71 * one per device. The tree of tree roots points to the device tree
73 #define BTRFS_DEV_TREE_OBJECTID 4ULL
75 /* one per subvolume, storing files and directories */
76 #define BTRFS_FS_TREE_OBJECTID 5ULL
78 /* directory objectid inside the root tree */
79 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
80 /* holds checksums of all the data extents */
81 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
82 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
84 /* for storing items that use the BTRFS_UUID_KEY* */
85 #define BTRFS_UUID_TREE_OBJECTID 9ULL
87 /* tracks free space in block groups. */
88 #define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
90 /* device stats in the device tree */
91 #define BTRFS_DEV_STATS_OBJECTID 0ULL
93 /* for storing balance parameters in the root tree */
94 #define BTRFS_BALANCE_OBJECTID -4ULL
96 /* oprhan objectid for tracking unlinked/truncated files */
97 #define BTRFS_ORPHAN_OBJECTID -5ULL
99 /* does write ahead logging to speed up fsyncs */
100 #define BTRFS_TREE_LOG_OBJECTID -6ULL
101 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
103 /* space balancing */
104 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
105 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
108 * extent checksums all have this objectid
109 * this allows them to share the logging tree
112 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
114 /* For storing free space cache */
115 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
118 * The inode number assigned to the special inode for sotring
121 #define BTRFS_FREE_INO_OBJECTID -12ULL
123 /* dummy objectid represents multiple objectids */
124 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
127 * All files have objectids in this range.
129 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
130 #define BTRFS_LAST_FREE_OBJECTID -256ULL
131 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
136 * the device items go into the chunk tree. The key is in the form
137 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
139 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
142 * the max metadata block size. This limit is somewhat artificial,
143 * but the memmove costs go through the roof for larger blocks.
145 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
148 * we can actually store much bigger names, but lets not confuse the rest
151 #define BTRFS_NAME_LEN 255
154 * Theoretical limit is larger, but we keep this down to a sane
155 * value. That should limit greatly the possibility of collisions on
158 #define BTRFS_LINK_MAX 65535U
160 /* 32 bytes in various csum fields */
161 #define BTRFS_CSUM_SIZE 32
164 #define BTRFS_CSUM_TYPE_CRC32 0
166 static int btrfs_csum_sizes
[] = { 4 };
168 /* four bytes for CRC32 */
169 #define BTRFS_CRC32_SIZE 4
170 #define BTRFS_EMPTY_DIR_SIZE 0
172 #define BTRFS_FT_UNKNOWN 0
173 #define BTRFS_FT_REG_FILE 1
174 #define BTRFS_FT_DIR 2
175 #define BTRFS_FT_CHRDEV 3
176 #define BTRFS_FT_BLKDEV 4
177 #define BTRFS_FT_FIFO 5
178 #define BTRFS_FT_SOCK 6
179 #define BTRFS_FT_SYMLINK 7
180 #define BTRFS_FT_XATTR 8
181 #define BTRFS_FT_MAX 9
183 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
186 * the key defines the order in the tree, and so it also defines (optimal)
187 * block layout. objectid corresponds to the inode number. The flags
188 * tells us things about the object, and is a kind of stream selector.
189 * so for a given inode, keys with flags of 1 might refer to the inode
190 * data, flags of 2 may point to file data in the btree and flags == 3
191 * may point to extents.
193 * offset is the starting byte offset for this key in the stream.
195 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
196 * in cpu native order. Otherwise they are identical and their sizes
197 * should be the same (ie both packed)
199 struct btrfs_disk_key
{
203 } __attribute__ ((__packed__
));
209 } __attribute__ ((__packed__
));
211 struct btrfs_mapping_tree
{
212 struct cache_tree cache_tree
;
215 #define BTRFS_UUID_SIZE 16
216 struct btrfs_dev_item
{
217 /* the internal btrfs device id */
220 /* size of the device */
226 /* optimal io alignment for this device */
229 /* optimal io width for this device */
232 /* minimal io size for this device */
235 /* type and info about this device */
238 /* expected generation for this device */
242 * starting byte of this partition on the device,
243 * to allow for stripe alignment in the future
247 /* grouping information for allocation decisions */
250 /* seek speed 0-100 where 100 is fastest */
253 /* bandwidth 0-100 where 100 is fastest */
256 /* btrfs generated uuid for this device */
257 u8 uuid
[BTRFS_UUID_SIZE
];
259 /* uuid of FS who owns this device */
260 u8 fsid
[BTRFS_UUID_SIZE
];
261 } __attribute__ ((__packed__
));
263 struct btrfs_stripe
{
266 u8 dev_uuid
[BTRFS_UUID_SIZE
];
267 } __attribute__ ((__packed__
));
270 /* size of this chunk in bytes */
273 /* objectid of the root referencing this chunk */
279 /* optimal io alignment for this chunk */
282 /* optimal io width for this chunk */
285 /* minimal io size for this chunk */
288 /* 2^16 stripes is quite a lot, a second limit is the size of a single
293 /* sub stripes only matter for raid10 */
295 struct btrfs_stripe stripe
;
296 /* additional stripes go here */
297 } __attribute__ ((__packed__
));
299 #define BTRFS_FREE_SPACE_EXTENT 1
300 #define BTRFS_FREE_SPACE_BITMAP 2
302 struct btrfs_free_space_entry
{
306 } __attribute__ ((__packed__
));
308 struct btrfs_free_space_header
{
309 struct btrfs_disk_key location
;
313 } __attribute__ ((__packed__
));
315 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
317 BUG_ON(num_stripes
== 0);
318 return sizeof(struct btrfs_chunk
) +
319 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
322 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
323 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
324 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
325 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
326 #define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
327 #define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
329 #define BTRFS_BACKREF_REV_MAX 256
330 #define BTRFS_BACKREF_REV_SHIFT 56
331 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
332 BTRFS_BACKREF_REV_SHIFT)
334 #define BTRFS_OLD_BACKREF_REV 0
335 #define BTRFS_MIXED_BACKREF_REV 1
338 * every tree block (leaf or node) starts with this header.
340 struct btrfs_header
{
341 /* these first four must match the super block */
342 u8 csum
[BTRFS_CSUM_SIZE
];
343 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
344 __le64 bytenr
; /* which block this node is supposed to live in */
347 /* allowed to be different from the super from here on down */
348 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
353 } __attribute__ ((__packed__
));
355 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
356 sizeof(struct btrfs_header)) / \
357 sizeof(struct btrfs_key_ptr))
358 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
359 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
360 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
361 sizeof(struct btrfs_item) - \
362 sizeof(struct btrfs_file_extent_item))
363 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
364 sizeof(struct btrfs_item) -\
365 sizeof(struct btrfs_dir_item))
369 * this is a very generous portion of the super block, giving us
370 * room to translate 14 chunks with 3 stripes each.
372 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
373 #define BTRFS_LABEL_SIZE 256
376 * just in case we somehow lose the roots and are not able to mount,
377 * we store an array of the roots from previous transactions
380 #define BTRFS_NUM_BACKUP_ROOTS 4
381 struct btrfs_root_backup
{
383 __le64 tree_root_gen
;
386 __le64 chunk_root_gen
;
389 __le64 extent_root_gen
;
398 __le64 csum_root_gen
;
408 u8 extent_root_level
;
412 /* future and to align */
414 } __attribute__ ((__packed__
));
417 * the super block basically lists the main trees of the FS
418 * it currently lacks any block count etc etc
420 struct btrfs_super_block
{
421 u8 csum
[BTRFS_CSUM_SIZE
];
422 /* the first 3 fields must match struct btrfs_header */
423 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
424 __le64 bytenr
; /* this block number */
427 /* allowed to be different from the btrfs_header from here own down */
434 /* this will help find the new super based on the log root */
435 __le64 log_root_transid
;
438 __le64 root_dir_objectid
;
442 /* Unused and must be equal to nodesize */
445 __le32 sys_chunk_array_size
;
446 __le64 chunk_root_generation
;
448 __le64 compat_ro_flags
;
449 __le64 incompat_flags
;
454 struct btrfs_dev_item dev_item
;
456 char label
[BTRFS_LABEL_SIZE
];
458 __le64 cache_generation
;
459 __le64 uuid_tree_generation
;
461 /* future expansion */
463 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
464 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
465 } __attribute__ ((__packed__
));
468 * Compat flags that we support. If any incompat flags are set other than the
469 * ones specified below then we will fail to mount
471 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
473 * Older kernels on big-endian systems produced broken free space tree bitmaps,
474 * and btrfs-progs also used to corrupt the free space tree. If this bit is
475 * clear, then the free space tree cannot be trusted. btrfs-progs can also
476 * intentionally clear this bit to ask the kernel to rebuild the free space
479 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)
481 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
482 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
483 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
484 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
487 * some patches floated around with a second compression method
488 * lets save that incompat here for when they do get in
489 * Note we don't actually support it, we're just reserving the
492 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
495 * older kernels tried to do bigger metadata blocks, but the
496 * code was pretty buggy. Lets not let them try anymore.
498 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
499 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
500 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
501 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
502 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
504 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
507 * The FREE_SPACE_TREE and FREE_SPACE_TREE_VALID compat_ro bits must not be
508 * added here until read-write support for the free space tree is implemented in
511 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
513 #define BTRFS_FEATURE_INCOMPAT_SUPP \
514 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
515 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
516 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
517 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
518 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
519 BTRFS_FEATURE_INCOMPAT_RAID56 | \
520 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
521 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
522 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
525 * A leaf is full of items. offset and size tell us where to find
526 * the item in the leaf (relative to the start of the data area)
529 struct btrfs_disk_key key
;
532 } __attribute__ ((__packed__
));
535 * leaves have an item area and a data area:
536 * [item0, item1....itemN] [free space] [dataN...data1, data0]
538 * The data is separate from the items to get the keys closer together
542 struct btrfs_header header
;
543 struct btrfs_item items
[];
544 } __attribute__ ((__packed__
));
547 * all non-leaf blocks are nodes, they hold only keys and pointers to
550 struct btrfs_key_ptr
{
551 struct btrfs_disk_key key
;
554 } __attribute__ ((__packed__
));
557 struct btrfs_header header
;
558 struct btrfs_key_ptr ptrs
[];
559 } __attribute__ ((__packed__
));
562 * btrfs_paths remember the path taken from the root down to the leaf.
563 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
564 * to any other levels that are present.
566 * The slots array records the index of the item or block pointer
567 * used while walking the tree.
571 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
572 int slots
[BTRFS_MAX_LEVEL
];
574 /* The kernel locking sheme is not done in userspace. */
575 int locks
[BTRFS_MAX_LEVEL
];
578 /* keep some upper locks as we walk down */
582 * set by btrfs_split_item, tells search_slot to keep all locks
583 * and to force calls to keep space in the nodes
590 * items in the extent btree are used to record the objectid of the
591 * owner of the block and the number of references
594 struct btrfs_extent_item
{
598 } __attribute__ ((__packed__
));
600 struct btrfs_extent_item_v0
{
602 } __attribute__ ((__packed__
));
604 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
605 sizeof(struct btrfs_item))
606 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
608 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
609 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
611 /* following flags only apply to tree blocks */
613 /* use full backrefs for extent pointers in the block*/
614 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
616 struct btrfs_tree_block_info
{
617 struct btrfs_disk_key key
;
619 } __attribute__ ((__packed__
));
621 struct btrfs_extent_data_ref
{
626 } __attribute__ ((__packed__
));
628 struct btrfs_shared_data_ref
{
630 } __attribute__ ((__packed__
));
632 struct btrfs_extent_inline_ref
{
635 } __attribute__ ((__packed__
));
637 struct btrfs_extent_ref_v0
{
642 } __attribute__ ((__packed__
));
644 /* dev extents record free space on individual devices. The owner
645 * field points back to the chunk allocation mapping tree that allocated
646 * the extent. The chunk tree uuid field is a way to double check the owner
648 struct btrfs_dev_extent
{
650 __le64 chunk_objectid
;
653 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
654 } __attribute__ ((__packed__
));
656 struct btrfs_inode_ref
{
660 } __attribute__ ((__packed__
));
662 struct btrfs_inode_extref
{
663 __le64 parent_objectid
;
666 __u8 name
[0]; /* name goes here */
667 } __attribute__ ((__packed__
));
669 struct btrfs_timespec
{
672 } __attribute__ ((__packed__
));
675 BTRFS_COMPRESS_NONE
= 0,
676 BTRFS_COMPRESS_ZLIB
= 1,
677 BTRFS_COMPRESS_LZO
= 2,
678 BTRFS_COMPRESS_TYPES
= 2,
679 BTRFS_COMPRESS_LAST
= 3,
680 } btrfs_compression_type
;
682 /* we don't understand any encryption methods right now */
684 BTRFS_ENCRYPTION_NONE
= 0,
685 BTRFS_ENCRYPTION_LAST
= 1,
686 } btrfs_encryption_type
;
688 enum btrfs_tree_block_status
{
689 BTRFS_TREE_BLOCK_CLEAN
,
690 BTRFS_TREE_BLOCK_INVALID_NRITEMS
,
691 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY
,
692 BTRFS_TREE_BLOCK_BAD_KEY_ORDER
,
693 BTRFS_TREE_BLOCK_INVALID_LEVEL
,
694 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE
,
695 BTRFS_TREE_BLOCK_INVALID_OFFSETS
,
698 struct btrfs_inode_item
{
699 /* nfs style generation number */
701 /* transid that last touched this inode */
713 /* modification sequence number for NFS */
717 * a little future expansion, for more than this we can
718 * just grow the inode item and version it
721 struct btrfs_timespec atime
;
722 struct btrfs_timespec ctime
;
723 struct btrfs_timespec mtime
;
724 struct btrfs_timespec otime
;
725 } __attribute__ ((__packed__
));
727 struct btrfs_dir_log_item
{
729 } __attribute__ ((__packed__
));
731 struct btrfs_dir_item
{
732 struct btrfs_disk_key location
;
737 } __attribute__ ((__packed__
));
739 struct btrfs_root_item_v0
{
740 struct btrfs_inode_item inode
;
746 __le64 last_snapshot
;
749 struct btrfs_disk_key drop_progress
;
752 } __attribute__ ((__packed__
));
754 struct btrfs_root_item
{
755 struct btrfs_inode_item inode
;
761 __le64 last_snapshot
;
764 struct btrfs_disk_key drop_progress
;
769 * The following fields appear after subvol_uuids+subvol_times
774 * This generation number is used to test if the new fields are valid
775 * and up to date while reading the root item. Every time the root item
776 * is written out, the "generation" field is copied into this field. If
777 * anyone ever mounted the fs with an older kernel, we will have
778 * mismatching generation values here and thus must invalidate the
779 * new fields. See btrfs_update_root and btrfs_find_last_root for
781 * the offset of generation_v2 is also used as the start for the memset
782 * when invalidating the fields.
784 __le64 generation_v2
;
785 u8 uuid
[BTRFS_UUID_SIZE
];
786 u8 parent_uuid
[BTRFS_UUID_SIZE
];
787 u8 received_uuid
[BTRFS_UUID_SIZE
];
788 __le64 ctransid
; /* updated when an inode changes */
789 __le64 otransid
; /* trans when created */
790 __le64 stransid
; /* trans when sent. non-zero for received subvol */
791 __le64 rtransid
; /* trans when received. non-zero for received subvol */
792 struct btrfs_timespec ctime
;
793 struct btrfs_timespec otime
;
794 struct btrfs_timespec stime
;
795 struct btrfs_timespec rtime
;
796 __le64 reserved
[8]; /* for future */
797 } __attribute__ ((__packed__
));
800 * this is used for both forward and backward root refs
802 struct btrfs_root_ref
{
806 } __attribute__ ((__packed__
));
808 struct btrfs_disk_balance_args
{
810 * profiles to operate on, single is denoted by
811 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
817 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
818 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
831 /* devid subset filter [pstart..pend) */
835 /* btrfs virtual address space subset filter [vstart..vend) */
840 * profile to convert to, single is denoted by
841 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
845 /* BTRFS_BALANCE_ARGS_* */
849 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
850 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
862 * Process chunks that cross stripes_min..stripes_max devices,
863 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
869 } __attribute__ ((__packed__
));
872 * store balance parameters to disk so that balance can be properly
873 * resumed after crash or unmount
875 struct btrfs_balance_item
{
876 /* BTRFS_BALANCE_* */
879 struct btrfs_disk_balance_args data
;
880 struct btrfs_disk_balance_args meta
;
881 struct btrfs_disk_balance_args sys
;
884 } __attribute__ ((__packed__
));
886 #define BTRFS_FILE_EXTENT_INLINE 0
887 #define BTRFS_FILE_EXTENT_REG 1
888 #define BTRFS_FILE_EXTENT_PREALLOC 2
890 struct btrfs_file_extent_item
{
892 * transaction id that created this extent
896 * max number of bytes to hold this extent in ram
897 * when we split a compressed extent we can't know how big
898 * each of the resulting pieces will be. So, this is
899 * an upper limit on the size of the extent in ram instead of
905 * 32 bits for the various ways we might encode the data,
906 * including compression and encryption. If any of these
907 * are set to something a given disk format doesn't understand
908 * it is treated like an incompat flag for reading and writing,
913 __le16 other_encoding
; /* spare for later use */
915 /* are we inline data or a real extent? */
919 * disk space consumed by the extent, checksum blocks are included
923 __le64 disk_num_bytes
;
925 * the logical offset in file blocks (no csums)
926 * this extent record is for. This allows a file extent to point
927 * into the middle of an existing extent on disk, sharing it
928 * between two snapshots (useful if some bytes in the middle of the
929 * extent have changed
933 * the logical number of file blocks (no csums included)
937 } __attribute__ ((__packed__
));
939 struct btrfs_dev_stats_item
{
941 * grow this item struct at the end for future enhancements and keep
942 * the existing values unchanged
944 __le64 values
[BTRFS_DEV_STAT_VALUES_MAX
];
945 } __attribute__ ((__packed__
));
947 struct btrfs_csum_item
{
949 } __attribute__ ((__packed__
));
952 * We don't want to overwrite 1M at the beginning of device, even though
953 * there is our 1st superblock at 64k. Some possible reasons:
954 * - the first 64k blank is useful for some boot loader/manager
955 * - the first 1M could be scratched by buggy partitioner or somesuch
957 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)SZ_1M)
959 /* tag for the radix tree of block groups in ram */
960 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
961 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
962 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
963 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
964 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
965 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
966 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
967 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
968 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
969 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
970 #define BTRFS_NR_RAID_TYPES 7
972 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
973 BTRFS_BLOCK_GROUP_SYSTEM | \
974 BTRFS_BLOCK_GROUP_METADATA)
976 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
977 BTRFS_BLOCK_GROUP_RAID1 | \
978 BTRFS_BLOCK_GROUP_RAID5 | \
979 BTRFS_BLOCK_GROUP_RAID6 | \
980 BTRFS_BLOCK_GROUP_DUP | \
981 BTRFS_BLOCK_GROUP_RAID10)
983 /* used in struct btrfs_balance_args fields */
984 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
987 * GLOBAL_RSV does not exist as a on-disk block group type and is used
988 * internally for exporting info about global block reserve from space infos
990 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
992 #define BTRFS_QGROUP_LEVEL_SHIFT 48
994 static inline u64
btrfs_qgroup_level(u64 qgroupid
)
996 return qgroupid
>> BTRFS_QGROUP_LEVEL_SHIFT
;
999 static inline u64
btrfs_qgroup_subvid(u64 qgroupid
)
1001 return qgroupid
& ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT
) - 1);
1004 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1005 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1006 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1008 struct btrfs_qgroup_status_item
{
1012 __le64 rescan
; /* progress during scanning */
1013 } __attribute__ ((__packed__
));
1015 struct btrfs_block_group_item
{
1017 __le64 chunk_objectid
;
1019 } __attribute__ ((__packed__
));
1021 struct btrfs_free_space_info
{
1022 __le32 extent_count
;
1024 } __attribute__ ((__packed__
));
1026 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1028 struct btrfs_qgroup_info_item
{
1031 __le64 referenced_compressed
;
1033 __le64 exclusive_compressed
;
1034 } __attribute__ ((__packed__
));
1036 /* flags definition for qgroup limits */
1037 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1038 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1039 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1040 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1041 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1042 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1044 struct btrfs_qgroup_limit_item
{
1046 __le64 max_referenced
;
1047 __le64 max_exclusive
;
1048 __le64 rsv_referenced
;
1049 __le64 rsv_exclusive
;
1050 } __attribute__ ((__packed__
));
1052 struct btrfs_space_info
{
1058 struct list_head list
;
1061 struct btrfs_block_group_cache
{
1062 struct cache_extent cache
;
1063 struct btrfs_key key
;
1064 struct btrfs_block_group_item item
;
1065 struct btrfs_space_info
*space_info
;
1066 struct btrfs_free_space_ctl
*free_space_ctl
;
1074 struct btrfs_device
;
1075 struct btrfs_fs_devices
;
1076 struct btrfs_fs_info
{
1077 u8 fsid
[BTRFS_FSID_SIZE
];
1079 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1080 u8
*new_chunk_tree_uuid
;
1081 struct btrfs_root
*fs_root
;
1082 struct btrfs_root
*extent_root
;
1083 struct btrfs_root
*tree_root
;
1084 struct btrfs_root
*chunk_root
;
1085 struct btrfs_root
*dev_root
;
1086 struct btrfs_root
*csum_root
;
1087 struct btrfs_root
*quota_root
;
1088 struct btrfs_root
*free_space_root
;
1090 struct rb_root fs_root_tree
;
1092 /* the log root tree is a directory of all the other log roots */
1093 struct btrfs_root
*log_root_tree
;
1095 struct extent_io_tree extent_cache
;
1096 struct extent_io_tree free_space_cache
;
1097 struct extent_io_tree block_group_cache
;
1098 struct extent_io_tree pinned_extents
;
1099 struct extent_io_tree pending_del
;
1100 struct extent_io_tree extent_ins
;
1101 struct extent_io_tree
*excluded_extents
;
1103 /* logical->physical extent mapping */
1104 struct btrfs_mapping_tree mapping_tree
;
1107 u64 last_trans_committed
;
1109 u64 avail_data_alloc_bits
;
1110 u64 avail_metadata_alloc_bits
;
1111 u64 avail_system_alloc_bits
;
1112 u64 data_alloc_profile
;
1113 u64 metadata_alloc_profile
;
1114 u64 system_alloc_profile
;
1117 struct btrfs_trans_handle
*running_transaction
;
1118 struct btrfs_super_block
*super_copy
;
1119 struct mutex fs_mutex
;
1124 struct list_head dirty_cowonly_roots
;
1125 struct list_head recow_ebs
;
1127 struct btrfs_fs_devices
*fs_devices
;
1128 struct list_head space_info
;
1131 unsigned int readonly
:1;
1132 unsigned int on_restoring
:1;
1133 unsigned int is_chunk_recover
:1;
1134 unsigned int quota_enabled
:1;
1135 unsigned int suppress_check_block_errors
:1;
1136 unsigned int ignore_fsid_mismatch
:1;
1137 unsigned int ignore_chunk_tree_error
:1;
1138 unsigned int avoid_meta_chunk_alloc
:1;
1139 unsigned int avoid_sys_chunk_alloc
:1;
1140 unsigned int finalize_on_close
:1;
1142 int (*free_extent_hook
)(struct btrfs_trans_handle
*trans
,
1143 struct btrfs_root
*root
,
1144 u64 bytenr
, u64 num_bytes
, u64 parent
,
1145 u64 root_objectid
, u64 owner
, u64 offset
,
1147 struct cache_tree
*fsck_extent_cache
;
1148 struct cache_tree
*corrupt_blocks
;
1153 * in ram representation of the tree. extent_root is used for all allocations
1154 * and for the extent tree extent_root root.
1157 struct extent_buffer
*node
;
1158 struct extent_buffer
*commit_root
;
1159 struct btrfs_root_item root_item
;
1160 struct btrfs_key root_key
;
1161 struct btrfs_fs_info
*fs_info
;
1165 /* data allocations are done in sectorsize units */
1168 /* node allocations are done in nodesize units */
1171 /* Unused, equal to nodesize */
1174 /* leaf allocations are done in nodesize units */
1182 u64 last_inode_alloc
;
1185 * Record orphan data extent ref
1187 * TODO: Don't restore things in btrfs_root.
1188 * Directly record it into inode_record, which needs a lot of
1189 * infrastructure change to allow cooperation between extent
1192 struct list_head orphan_data_extents
;
1194 /* the dirty list is only used by non-reference counted roots */
1195 struct list_head dirty_list
;
1196 struct rb_node rb_node
;
1200 * inode items have the data typically returned from stat and store other
1201 * info about object characteristics. There is one for every file and dir in
1204 #define BTRFS_INODE_ITEM_KEY 1
1205 #define BTRFS_INODE_REF_KEY 12
1206 #define BTRFS_INODE_EXTREF_KEY 13
1207 #define BTRFS_XATTR_ITEM_KEY 24
1208 #define BTRFS_ORPHAN_ITEM_KEY 48
1210 #define BTRFS_DIR_LOG_ITEM_KEY 60
1211 #define BTRFS_DIR_LOG_INDEX_KEY 72
1213 * dir items are the name -> inode pointers in a directory. There is one
1214 * for every name in a directory.
1216 #define BTRFS_DIR_ITEM_KEY 84
1217 #define BTRFS_DIR_INDEX_KEY 96
1220 * extent data is for file data
1222 #define BTRFS_EXTENT_DATA_KEY 108
1225 * csum items have the checksums for data in the extents
1227 #define BTRFS_CSUM_ITEM_KEY 120
1229 * extent csums are stored in a separate tree and hold csums for
1230 * an entire extent on disk.
1232 #define BTRFS_EXTENT_CSUM_KEY 128
1235 * root items point to tree roots. There are typically in the root
1236 * tree used by the super block to find all the other trees
1238 #define BTRFS_ROOT_ITEM_KEY 132
1241 * root backrefs tie subvols and snapshots to the directory entries that
1244 #define BTRFS_ROOT_BACKREF_KEY 144
1247 * root refs make a fast index for listing all of the snapshots and
1248 * subvolumes referenced by a given root. They point directly to the
1249 * directory item in the root that references the subvol
1251 #define BTRFS_ROOT_REF_KEY 156
1254 * extent items are in the extent map tree. These record which blocks
1255 * are used, and how many references there are to each block
1257 #define BTRFS_EXTENT_ITEM_KEY 168
1260 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1261 * the length, so we save the level in key->offset instead of the length.
1263 #define BTRFS_METADATA_ITEM_KEY 169
1265 #define BTRFS_TREE_BLOCK_REF_KEY 176
1267 #define BTRFS_EXTENT_DATA_REF_KEY 178
1269 /* old style extent backrefs */
1270 #define BTRFS_EXTENT_REF_V0_KEY 180
1272 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1274 #define BTRFS_SHARED_DATA_REF_KEY 184
1278 * block groups give us hints into the extent allocation trees. Which
1279 * blocks are free etc etc
1281 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1284 * Every block group is represented in the free space tree by a free space info
1285 * item, which stores some accounting information. It is keyed on
1286 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1288 #define BTRFS_FREE_SPACE_INFO_KEY 198
1291 * A free space extent tracks an extent of space that is free in a block group.
1292 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1294 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1297 * When a block group becomes very fragmented, we convert it to use bitmaps
1298 * instead of extents. A free space bitmap is keyed on
1299 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1300 * (length / sectorsize) bits.
1302 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1304 #define BTRFS_DEV_EXTENT_KEY 204
1305 #define BTRFS_DEV_ITEM_KEY 216
1306 #define BTRFS_CHUNK_ITEM_KEY 228
1308 #define BTRFS_BALANCE_ITEM_KEY 248
1313 #define BTRFS_QGROUP_STATUS_KEY 240
1314 #define BTRFS_QGROUP_INFO_KEY 242
1315 #define BTRFS_QGROUP_LIMIT_KEY 244
1316 #define BTRFS_QGROUP_RELATION_KEY 246
1319 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
1321 #define BTRFS_BALANCE_ITEM_KEY 248
1324 * The key type for tree items that are stored persistently, but do not need to
1325 * exist for extended period of time. The items can exist in any tree.
1327 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
1331 * - balance status item
1332 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
1334 #define BTRFS_TEMPORARY_ITEM_KEY 248
1337 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
1339 #define BTRFS_DEV_STATS_KEY 249
1342 * The key type for tree items that are stored persistently and usually exist
1343 * for a long period, eg. filesystem lifetime. The item kinds can be status
1344 * information, stats or preference values. The item can exist in any tree.
1346 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
1350 * - device statistics, store IO stats in the device tree, one key for all
1352 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
1354 #define BTRFS_PERSISTENT_ITEM_KEY 249
1357 * Persistently stores the device replace state in the device tree.
1358 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1360 #define BTRFS_DEV_REPLACE_KEY 250
1363 * Stores items that allow to quickly map UUIDs to something else.
1364 * These items are part of the filesystem UUID tree.
1365 * The key is built like this:
1366 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1368 #if BTRFS_UUID_SIZE != 16
1369 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1371 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1372 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1373 * received subvols */
1376 * string items are for debugging. They just store a short string of
1379 #define BTRFS_STRING_ITEM_KEY 253
1383 #define BTRFS_INODE_NODATASUM (1 << 0)
1384 #define BTRFS_INODE_NODATACOW (1 << 1)
1385 #define BTRFS_INODE_READONLY (1 << 2)
1386 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1387 #define BTRFS_INODE_PREALLOC (1 << 4)
1388 #define BTRFS_INODE_SYNC (1 << 5)
1389 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1390 #define BTRFS_INODE_APPEND (1 << 7)
1391 #define BTRFS_INODE_NODUMP (1 << 8)
1392 #define BTRFS_INODE_NOATIME (1 << 9)
1393 #define BTRFS_INODE_DIRSYNC (1 << 10)
1394 #define BTRFS_INODE_COMPRESS (1 << 11)
1396 #define read_eb_member(eb, ptr, type, member, result) ( \
1397 read_extent_buffer(eb, (char *)(result), \
1398 ((unsigned long)(ptr)) + \
1399 offsetof(type, member), \
1400 sizeof(((type *)0)->member)))
1402 #define write_eb_member(eb, ptr, type, member, result) ( \
1403 write_extent_buffer(eb, (char *)(result), \
1404 ((unsigned long)(ptr)) + \
1405 offsetof(type, member), \
1406 sizeof(((type *)0)->member)))
1408 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1409 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1411 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1412 return le##bits##_to_cpu(h->member); \
1414 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1417 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1418 h->member = cpu_to_le##bits(val); \
1421 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1422 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1425 unsigned long offset = (unsigned long)s; \
1426 const type *p = (type *) (eb->data + offset); \
1427 return get_unaligned_le##bits(&p->member); \
1429 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1430 type *s, u##bits val) \
1432 unsigned long offset = (unsigned long)s; \
1433 type *p = (type *) (eb->data + offset); \
1434 put_unaligned_le##bits(val, &p->member); \
1437 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1438 static inline u##bits btrfs_##name(const type *s) \
1440 return le##bits##_to_cpu(s->member); \
1442 static inline void btrfs_set_##name(type *s, u##bits val) \
1444 s->member = cpu_to_le##bits(val); \
1447 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1448 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1449 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1450 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1451 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1452 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1454 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1455 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1456 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1457 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1458 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1459 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1461 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1462 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1464 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1466 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1468 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1470 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1472 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1473 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1475 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1477 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1479 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1482 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1484 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1487 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1489 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1492 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1493 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1494 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1495 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1496 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1497 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1498 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1499 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1500 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1501 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1502 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1504 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1506 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1509 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1510 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1511 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1513 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1515 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1517 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1519 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1520 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1522 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1524 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1525 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1527 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1530 unsigned long offset
= (unsigned long)c
;
1531 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1532 offset
+= nr
* sizeof(struct btrfs_stripe
);
1533 return (struct btrfs_stripe
*)offset
;
1536 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1538 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1541 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1542 struct btrfs_chunk
*c
, int nr
)
1544 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1547 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1548 struct btrfs_chunk
*c
, int nr
,
1551 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1554 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1555 struct btrfs_chunk
*c
, int nr
)
1557 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1560 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1561 struct btrfs_chunk
*c
, int nr
,
1564 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1567 /* struct btrfs_block_group_item */
1568 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1570 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1572 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1573 struct btrfs_block_group_item
, chunk_objectid
, 64);
1575 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1576 struct btrfs_block_group_item
, chunk_objectid
, 64);
1577 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1578 struct btrfs_block_group_item
, flags
, 64);
1579 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1580 struct btrfs_block_group_item
, flags
, 64);
1582 /* struct btrfs_free_space_info */
1583 BTRFS_SETGET_FUNCS(free_space_extent_count
, struct btrfs_free_space_info
,
1585 BTRFS_SETGET_FUNCS(free_space_flags
, struct btrfs_free_space_info
, flags
, 32);
1587 /* struct btrfs_inode_ref */
1588 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1589 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1590 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1592 /* struct btrfs_inode_extref */
1593 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1594 parent_objectid
, 64);
1595 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1597 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1599 /* struct btrfs_inode_item */
1600 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1601 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1602 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1603 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1604 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1605 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1606 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1607 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1608 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1609 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1610 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1611 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1613 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
1614 struct btrfs_inode_item
, generation
, 64);
1615 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
,
1616 struct btrfs_inode_item
, sequence
, 64);
1617 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
,
1618 struct btrfs_inode_item
, transid
, 64);
1619 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
1620 struct btrfs_inode_item
, size
, 64);
1621 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
,
1622 struct btrfs_inode_item
, nbytes
, 64);
1623 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
1624 struct btrfs_inode_item
, block_group
, 64);
1625 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
1626 struct btrfs_inode_item
, nlink
, 32);
1627 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
1628 struct btrfs_inode_item
, uid
, 32);
1629 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
1630 struct btrfs_inode_item
, gid
, 32);
1631 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
1632 struct btrfs_inode_item
, mode
, 32);
1633 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
1634 struct btrfs_inode_item
, rdev
, 64);
1635 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
1636 struct btrfs_inode_item
, flags
, 64);
1638 static inline struct btrfs_timespec
*
1639 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1641 unsigned long ptr
= (unsigned long)inode_item
;
1642 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1643 return (struct btrfs_timespec
*)ptr
;
1646 static inline struct btrfs_timespec
*
1647 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1649 unsigned long ptr
= (unsigned long)inode_item
;
1650 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1651 return (struct btrfs_timespec
*)ptr
;
1654 static inline struct btrfs_timespec
*
1655 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1657 unsigned long ptr
= (unsigned long)inode_item
;
1658 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1659 return (struct btrfs_timespec
*)ptr
;
1662 static inline struct btrfs_timespec
*
1663 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1665 unsigned long ptr
= (unsigned long)inode_item
;
1666 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1667 return (struct btrfs_timespec
*)ptr
;
1670 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1671 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1672 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
1674 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
1677 /* struct btrfs_dev_extent */
1678 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1680 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1681 chunk_objectid
, 64);
1682 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1684 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1686 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length
, struct btrfs_dev_extent
,
1689 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1691 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1692 return (u8
*)((unsigned long)dev
+ ptr
);
1696 /* struct btrfs_extent_item */
1697 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1698 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
, refs
, 64);
1699 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1701 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1702 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags
, struct btrfs_extent_item
, flags
, 64);
1704 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1706 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1708 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1709 struct btrfs_tree_block_info
*item
,
1710 struct btrfs_disk_key
*key
)
1712 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1715 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1716 struct btrfs_tree_block_info
*item
,
1717 struct btrfs_disk_key
*key
)
1719 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1722 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1724 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1726 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1728 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1731 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1734 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1736 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1738 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type
,
1739 struct btrfs_extent_inline_ref
, type
, 8);
1740 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset
,
1741 struct btrfs_extent_inline_ref
, offset
, 64);
1743 static inline u32
btrfs_extent_inline_ref_size(int type
)
1745 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1746 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1747 return sizeof(struct btrfs_extent_inline_ref
);
1748 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1749 return sizeof(struct btrfs_shared_data_ref
) +
1750 sizeof(struct btrfs_extent_inline_ref
);
1751 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1752 return sizeof(struct btrfs_extent_data_ref
) +
1753 offsetof(struct btrfs_extent_inline_ref
, offset
);
1758 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1759 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1761 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1762 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1764 /* struct btrfs_node */
1765 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1766 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1768 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1771 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1772 sizeof(struct btrfs_key_ptr
) * nr
;
1773 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1776 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1780 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1781 sizeof(struct btrfs_key_ptr
) * nr
;
1782 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1785 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1788 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1789 sizeof(struct btrfs_key_ptr
) * nr
;
1790 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1793 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1797 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1798 sizeof(struct btrfs_key_ptr
) * nr
;
1799 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1802 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1804 return offsetof(struct btrfs_node
, ptrs
) +
1805 sizeof(struct btrfs_key_ptr
) * nr
;
1808 static inline void btrfs_node_key(struct extent_buffer
*eb
,
1809 struct btrfs_disk_key
*disk_key
, int nr
)
1812 ptr
= btrfs_node_key_ptr_offset(nr
);
1813 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1814 struct btrfs_key_ptr
, key
, disk_key
);
1817 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1818 struct btrfs_disk_key
*disk_key
, int nr
)
1821 ptr
= btrfs_node_key_ptr_offset(nr
);
1822 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1823 struct btrfs_key_ptr
, key
, disk_key
);
1826 /* struct btrfs_item */
1827 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1828 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1830 static inline unsigned long btrfs_item_nr_offset(int nr
)
1832 return offsetof(struct btrfs_leaf
, items
) +
1833 sizeof(struct btrfs_item
) * nr
;
1836 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1838 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1841 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1842 struct btrfs_item
*item
)
1844 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1847 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1849 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
1852 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1854 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
1857 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1859 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
1862 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1863 struct btrfs_disk_key
*disk_key
, int nr
)
1865 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1866 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1869 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1870 struct btrfs_disk_key
*disk_key
, int nr
)
1872 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1873 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1876 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1879 * struct btrfs_root_ref
1881 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1882 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1883 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1885 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1886 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1887 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1889 /* struct btrfs_dir_item */
1890 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1891 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1892 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1893 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1895 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1896 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
1897 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1898 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
, transid
, 64);
1900 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1901 struct btrfs_dir_item
*item
,
1902 struct btrfs_disk_key
*key
)
1904 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1907 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1908 struct btrfs_dir_item
*item
,
1909 struct btrfs_disk_key
*key
)
1911 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1914 /* struct btrfs_free_space_header */
1915 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1917 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1919 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1922 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1923 struct btrfs_free_space_header
*h
,
1924 struct btrfs_disk_key
*key
)
1926 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1929 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1930 struct btrfs_free_space_header
*h
,
1931 struct btrfs_disk_key
*key
)
1933 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1936 /* struct btrfs_disk_key */
1937 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1939 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1940 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1942 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1943 struct btrfs_disk_key
*disk
)
1945 cpu
->offset
= le64_to_cpu(disk
->offset
);
1946 cpu
->type
= disk
->type
;
1947 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1950 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1951 struct btrfs_key
*cpu
)
1953 disk
->offset
= cpu_to_le64(cpu
->offset
);
1954 disk
->type
= cpu
->type
;
1955 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1958 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1959 struct btrfs_key
*key
, int nr
)
1961 struct btrfs_disk_key disk_key
;
1962 btrfs_node_key(eb
, &disk_key
, nr
);
1963 btrfs_disk_key_to_cpu(key
, &disk_key
);
1966 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1967 struct btrfs_key
*key
, int nr
)
1969 struct btrfs_disk_key disk_key
;
1970 btrfs_item_key(eb
, &disk_key
, nr
);
1971 btrfs_disk_key_to_cpu(key
, &disk_key
);
1974 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1975 struct btrfs_dir_item
*item
,
1976 struct btrfs_key
*key
)
1978 struct btrfs_disk_key disk_key
;
1979 btrfs_dir_item_key(eb
, item
, &disk_key
);
1980 btrfs_disk_key_to_cpu(key
, &disk_key
);
1983 /* struct btrfs_header */
1984 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1985 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1987 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1988 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1989 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1990 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1991 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
1992 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
, nritems
,
1994 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
1995 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
1998 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2000 return (btrfs_header_flags(eb
) & flag
) == flag
;
2003 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2005 u64 flags
= btrfs_header_flags(eb
);
2006 btrfs_set_header_flags(eb
, flags
| flag
);
2007 return (flags
& flag
) == flag
;
2010 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2012 u64 flags
= btrfs_header_flags(eb
);
2013 btrfs_set_header_flags(eb
, flags
& ~flag
);
2014 return (flags
& flag
) == flag
;
2017 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2019 u64 flags
= btrfs_header_flags(eb
);
2020 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2023 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2026 u64 flags
= btrfs_header_flags(eb
);
2027 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2028 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2029 btrfs_set_header_flags(eb
, flags
);
2032 static inline unsigned long btrfs_header_fsid(void)
2034 return offsetof(struct btrfs_header
, fsid
);
2037 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2039 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
2042 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
2044 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
2048 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2050 return (btrfs_header_level(eb
) == 0);
2053 /* struct btrfs_root_item */
2054 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2056 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2057 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2058 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2060 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2062 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2063 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2064 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2065 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2066 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2067 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2068 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2069 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2071 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2073 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2075 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2077 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2079 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2082 /* struct btrfs_root_backup */
2083 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2085 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2087 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2088 tree_root_level
, 8);
2090 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2092 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2093 chunk_root_gen
, 64);
2094 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2095 chunk_root_level
, 8);
2097 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2099 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2100 extent_root_gen
, 64);
2101 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2102 extent_root_level
, 8);
2104 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2106 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2108 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2111 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2113 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2115 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2118 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2120 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2122 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2123 csum_root_level
, 8);
2124 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2126 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2128 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2131 /* struct btrfs_super_block */
2133 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2134 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2135 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2137 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2138 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2139 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2140 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2141 struct btrfs_super_block
, chunk_root_generation
, 64);
2142 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2144 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2146 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2147 chunk_root_level
, 8);
2148 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2150 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2151 log_root_transid
, 64);
2152 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2154 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2156 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2158 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2160 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2162 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2164 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2166 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2167 root_dir_objectid
, 64);
2168 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2170 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2172 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2173 compat_ro_flags
, 64);
2174 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2175 incompat_flags
, 64);
2176 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2178 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2179 cache_generation
, 64);
2180 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2181 uuid_tree_generation
, 64);
2182 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2184 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2186 int t
= btrfs_super_csum_type(s
);
2187 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2188 return btrfs_csum_sizes
[t
];
2191 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2193 return offsetof(struct btrfs_leaf
, items
);
2196 /* struct btrfs_file_extent_item */
2197 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2198 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2200 static inline unsigned long btrfs_file_extent_inline_start(struct
2201 btrfs_file_extent_item
*e
)
2203 unsigned long offset
= (unsigned long)e
;
2204 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2208 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2210 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2213 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2215 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2217 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2219 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
, struct btrfs_file_extent_item
,
2221 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2222 disk_num_bytes
, 64);
2223 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2225 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
, struct btrfs_file_extent_item
,
2227 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2229 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
, struct btrfs_file_extent_item
,
2231 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2233 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2235 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2237 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
, struct btrfs_file_extent_item
,
2239 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2241 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2242 other_encoding
, 16);
2244 /* btrfs_qgroup_status_item */
2245 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2247 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2249 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2251 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
2254 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version
,
2255 struct btrfs_qgroup_status_item
, version
, 64);
2256 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation
,
2257 struct btrfs_qgroup_status_item
, generation
, 64);
2258 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags
,
2259 struct btrfs_qgroup_status_item
, flags
, 64);
2260 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan
,
2261 struct btrfs_qgroup_status_item
, rescan
, 64);
2263 /* btrfs_qgroup_info_item */
2264 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2266 BTRFS_SETGET_FUNCS(qgroup_info_referenced
, struct btrfs_qgroup_info_item
,
2268 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed
,
2269 struct btrfs_qgroup_info_item
, referenced_compressed
, 64);
2270 BTRFS_SETGET_FUNCS(qgroup_info_exclusive
, struct btrfs_qgroup_info_item
,
2272 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed
,
2273 struct btrfs_qgroup_info_item
, exclusive_compressed
, 64);
2275 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2276 struct btrfs_qgroup_info_item
, generation
, 64);
2277 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced
,
2278 struct btrfs_qgroup_info_item
, referenced
, 64);
2279 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed
,
2280 struct btrfs_qgroup_info_item
, referenced_compressed
, 64);
2281 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive
,
2282 struct btrfs_qgroup_info_item
, exclusive
, 64);
2283 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed
,
2284 struct btrfs_qgroup_info_item
, exclusive_compressed
, 64);
2286 /* btrfs_qgroup_limit_item */
2287 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2289 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced
, struct btrfs_qgroup_limit_item
,
2290 max_referenced
, 64);
2291 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive
, struct btrfs_qgroup_limit_item
,
2293 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced
, struct btrfs_qgroup_limit_item
,
2294 rsv_referenced
, 64);
2295 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive
, struct btrfs_qgroup_limit_item
,
2298 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags
,
2299 struct btrfs_qgroup_limit_item
, flags
, 64);
2300 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced
,
2301 struct btrfs_qgroup_limit_item
, max_referenced
, 64);
2302 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive
,
2303 struct btrfs_qgroup_limit_item
, max_exclusive
, 64);
2304 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced
,
2305 struct btrfs_qgroup_limit_item
, rsv_referenced
, 64);
2306 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive
,
2307 struct btrfs_qgroup_limit_item
, rsv_exclusive
, 64);
2309 /* btrfs_balance_item */
2310 BTRFS_SETGET_FUNCS(balance_item_flags
, struct btrfs_balance_item
, flags
, 64);
2312 static inline struct btrfs_disk_balance_args
* btrfs_balance_item_data(
2313 struct extent_buffer
*eb
, struct btrfs_balance_item
*bi
)
2315 unsigned long offset
= (unsigned long)bi
;
2316 struct btrfs_balance_item
*p
;
2317 p
= (struct btrfs_balance_item
*)(eb
->data
+ offset
);
2321 static inline struct btrfs_disk_balance_args
* btrfs_balance_item_meta(
2322 struct extent_buffer
*eb
, struct btrfs_balance_item
*bi
)
2324 unsigned long offset
= (unsigned long)bi
;
2325 struct btrfs_balance_item
*p
;
2326 p
= (struct btrfs_balance_item
*)(eb
->data
+ offset
);
2330 static inline struct btrfs_disk_balance_args
* btrfs_balance_item_sys(
2331 struct extent_buffer
*eb
, struct btrfs_balance_item
*bi
)
2333 unsigned long offset
= (unsigned long)bi
;
2334 struct btrfs_balance_item
*p
;
2335 p
= (struct btrfs_balance_item
*)(eb
->data
+ offset
);
2340 * btrfs_dev_stats_item helper, returns pointer to the raw array, do the
2341 * endiannes conversion, @dsi is offset to eb data
2343 static inline __le64
* btrfs_dev_stats_values(struct extent_buffer
*eb
,
2344 struct btrfs_dev_stats_item
*dsi
)
2346 unsigned long offset
= (unsigned long)dsi
;
2347 struct btrfs_dev_stats_item
*p
;
2348 p
= (struct btrfs_dev_stats_item
*)(eb
->data
+ offset
);
2353 * this returns the number of bytes used by the item on disk, minus the
2354 * size of any extent headers. If a file is compressed on disk, this is
2355 * the compressed size
2357 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2358 struct btrfs_item
*e
)
2360 unsigned long offset
;
2361 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2362 return btrfs_item_size(eb
, e
) - offset
;
2365 /* struct btrfs_ioctl_search_header */
2366 static inline u64
btrfs_search_header_transid(struct btrfs_ioctl_search_header
*sh
)
2368 return get_unaligned_64(&sh
->transid
);
2371 static inline u64
btrfs_search_header_objectid(struct btrfs_ioctl_search_header
*sh
)
2373 return get_unaligned_64(&sh
->objectid
);
2376 static inline u64
btrfs_search_header_offset(struct btrfs_ioctl_search_header
*sh
)
2378 return get_unaligned_64(&sh
->offset
);
2381 static inline u32
btrfs_search_header_type(struct btrfs_ioctl_search_header
*sh
)
2383 return get_unaligned_32(&sh
->type
);
2386 static inline u32
btrfs_search_header_len(struct btrfs_ioctl_search_header
*sh
)
2388 return get_unaligned_32(&sh
->len
);
2391 /* this returns the number of file bytes represented by the inline item.
2392 * If an item is compressed, this is the uncompressed size
2394 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2396 struct btrfs_file_extent_item
*fi
)
2399 * return the space used on disk if this item isn't
2400 * compressed or encoded
2402 if (btrfs_file_extent_compression(eb
, fi
) == 0 &&
2403 btrfs_file_extent_encryption(eb
, fi
) == 0 &&
2404 btrfs_file_extent_other_encoding(eb
, fi
) == 0) {
2405 return btrfs_file_extent_inline_item_len(eb
,
2406 btrfs_item_nr(slot
));
2409 /* otherwise use the ram bytes field */
2410 return btrfs_file_extent_ram_bytes(eb
, fi
);
2414 * NOTE: Backward compatibility, do not use.
2415 * Replacement: read nodesize directly
2417 __attribute__((deprecated
))
2418 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
2420 return root
->leafsize
;
2421 return root
->nodesize
;
2424 #define btrfs_fs_incompat(fs_info, opt) \
2425 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
2427 static inline int __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
2429 struct btrfs_super_block
*disk_super
;
2430 disk_super
= fs_info
->super_copy
;
2431 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
2434 #define btrfs_fs_compat_ro(fs_info, opt) \
2435 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
2437 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info
*fs_info
, u64 flag
)
2439 struct btrfs_super_block
*disk_super
;
2440 disk_super
= fs_info
->super_copy
;
2441 return !!(btrfs_super_compat_ro_flags(disk_super
) & flag
);
2444 /* helper function to cast into the data area of the leaf. */
2445 #define btrfs_item_ptr(leaf, slot, type) \
2446 ((type *)(btrfs_leaf_data(leaf) + \
2447 btrfs_item_offset_nr(leaf, slot)))
2449 #define btrfs_item_ptr_offset(leaf, slot) \
2450 ((unsigned long)(btrfs_leaf_data(leaf) + \
2451 btrfs_item_offset_nr(leaf, slot)))
2454 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2455 struct btrfs_root
*root
,
2456 u64 num_bytes
, u64 empty_size
,
2457 u64 hint_byte
, u64 search_end
,
2458 struct btrfs_key
*ins
, int data
);
2459 int btrfs_fix_block_accounting(struct btrfs_trans_handle
*trans
,
2460 struct btrfs_root
*root
);
2461 void btrfs_pin_extent(struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 num_bytes
);
2462 void btrfs_unpin_extent(struct btrfs_fs_info
*fs_info
,
2463 u64 bytenr
, u64 num_bytes
);
2464 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
2465 struct btrfs_root
*root
);
2466 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
2467 btrfs_fs_info
*info
,
2469 struct btrfs_block_group_cache
*btrfs_lookup_first_block_group(struct
2470 btrfs_fs_info
*info
,
2472 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2473 struct btrfs_root
*root
,
2474 u32 blocksize
, u64 root_objectid
,
2475 struct btrfs_disk_key
*key
, int level
,
2476 u64 hint
, u64 empty_size
);
2477 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
2478 struct btrfs_root
*root
,
2479 u64 num_bytes
, u64 parent
,
2480 u64 root_objectid
, u64 ref_generation
,
2481 u64 owner
, u64 empty_size
, u64 hint_byte
,
2482 u64 search_end
, struct btrfs_key
*ins
, int data
);
2483 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2484 struct btrfs_root
*root
, u64 bytenr
,
2485 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2486 int btrfs_set_block_flags(struct btrfs_trans_handle
*trans
,
2487 struct btrfs_root
*root
,
2488 u64 bytenr
, int level
, u64 flags
);
2489 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2490 struct extent_buffer
*buf
, int record_parent
);
2491 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2492 struct extent_buffer
*buf
, int record_parent
);
2493 int btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2494 struct btrfs_root
*root
,
2495 struct extent_buffer
*buf
,
2496 u64 parent
, int last_ref
);
2497 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2498 struct btrfs_root
*root
,
2499 u64 bytenr
, u64 num_bytes
, u64 parent
,
2500 u64 root_objectid
, u64 owner
, u64 offset
);
2501 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2502 struct btrfs_root
*root
,
2503 struct extent_io_tree
*unpin
);
2504 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2505 struct btrfs_root
*root
,
2506 u64 bytenr
, u64 num_bytes
, u64 parent
,
2507 u64 root_objectid
, u64 ref_generation
,
2508 u64 owner_objectid
);
2509 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
2510 struct btrfs_root
*root
, u64 bytenr
,
2511 u64 orig_parent
, u64 parent
,
2512 u64 root_objectid
, u64 ref_generation
,
2513 u64 owner_objectid
);
2514 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2515 struct btrfs_root
*root
);
2516 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2517 int btrfs_read_block_groups(struct btrfs_root
*root
);
2518 struct btrfs_block_group_cache
*
2519 btrfs_add_block_group(struct btrfs_fs_info
*fs_info
, u64 bytes_used
, u64 type
,
2520 u64 chunk_objectid
, u64 chunk_offset
, u64 size
);
2521 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2522 struct btrfs_root
*root
, u64 bytes_used
,
2523 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2525 int btrfs_make_block_groups(struct btrfs_trans_handle
*trans
,
2526 struct btrfs_root
*root
);
2527 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
2528 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
2529 int alloc
, int mark_free
);
2530 int btrfs_record_file_extent(struct btrfs_trans_handle
*trans
,
2531 struct btrfs_root
*root
, u64 objectid
,
2532 struct btrfs_inode_item
*inode
,
2533 u64 file_pos
, u64 disk_bytenr
,
2535 int btrfs_free_block_group(struct btrfs_trans_handle
*trans
,
2536 struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 len
);
2537 void free_excluded_extents(struct btrfs_root
*root
,
2538 struct btrfs_block_group_cache
*cache
);
2539 int exclude_super_stripes(struct btrfs_root
*root
,
2540 struct btrfs_block_group_cache
*cache
);
2541 u64
add_new_free_space(struct btrfs_block_group_cache
*block_group
,
2542 struct btrfs_fs_info
*info
, u64 start
, u64 end
);
2543 u64
hash_extent_data_ref(u64 root_objectid
, u64 owner
, u64 offset
);
2546 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2547 int btrfs_del_ptr(struct btrfs_root
*root
, struct btrfs_path
*path
,
2548 int level
, int slot
);
2549 enum btrfs_tree_block_status
2550 btrfs_check_node(struct btrfs_root
*root
, struct btrfs_disk_key
*parent_key
,
2551 struct extent_buffer
*buf
);
2552 enum btrfs_tree_block_status
2553 btrfs_check_leaf(struct btrfs_root
*root
, struct btrfs_disk_key
*parent_key
,
2554 struct extent_buffer
*buf
);
2555 void reada_for_search(struct btrfs_root
*root
, struct btrfs_path
*path
,
2556 int level
, int slot
, u64 objectid
);
2557 struct extent_buffer
*read_node_slot(struct btrfs_root
*root
,
2558 struct extent_buffer
*parent
, int slot
);
2559 int btrfs_previous_item(struct btrfs_root
*root
,
2560 struct btrfs_path
*path
, u64 min_objectid
,
2562 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2563 struct btrfs_path
*path
, u64 min_objectid
);
2564 int btrfs_next_extent_item(struct btrfs_root
*root
,
2565 struct btrfs_path
*path
, u64 max_objectid
);
2566 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2567 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2568 struct extent_buffer
*parent
, int parent_slot
,
2569 struct extent_buffer
**cow_ret
);
2570 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2571 struct btrfs_root
*root
,
2572 struct extent_buffer
*buf
,
2573 struct extent_buffer
*parent
, int parent_slot
,
2574 struct extent_buffer
**cow_ret
,
2575 u64 search_start
, u64 empty_size
);
2576 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2577 struct btrfs_root
*root
,
2578 struct extent_buffer
*buf
,
2579 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2580 int btrfs_extend_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
2582 int btrfs_truncate_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
2583 u32 new_size
, int from_end
);
2584 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2585 struct btrfs_root
*root
,
2586 struct btrfs_path
*path
,
2587 struct btrfs_key
*new_key
,
2588 unsigned long split_offset
);
2589 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2590 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2592 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*found_path
,
2593 u64 iobjectid
, u64 ioff
, u8 key_type
,
2594 struct btrfs_key
*found_key
);
2595 void btrfs_release_path(struct btrfs_path
*p
);
2596 void add_root_to_dirty_list(struct btrfs_root
*root
);
2597 struct btrfs_path
*btrfs_alloc_path(void);
2598 void btrfs_free_path(struct btrfs_path
*p
);
2599 void btrfs_init_path(struct btrfs_path
*p
);
2600 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2601 struct btrfs_path
*path
, int slot
, int nr
);
2603 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2604 struct btrfs_root
*root
,
2605 struct btrfs_path
*path
)
2607 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2610 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2611 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2612 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2613 struct btrfs_root
*root
,
2614 struct btrfs_path
*path
,
2615 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2617 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2618 struct btrfs_root
*root
,
2619 struct btrfs_path
*path
,
2620 struct btrfs_key
*key
,
2623 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2626 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2627 static inline int btrfs_next_item(struct btrfs_root
*root
,
2628 struct btrfs_path
*p
)
2631 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2632 return btrfs_next_leaf(root
, p
);
2636 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2637 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2638 void btrfs_fixup_low_keys(struct btrfs_root
*root
, struct btrfs_path
*path
,
2639 struct btrfs_disk_key
*key
, int level
);
2640 int btrfs_set_item_key_safe(struct btrfs_root
*root
, struct btrfs_path
*path
,
2641 struct btrfs_key
*new_key
);
2642 void btrfs_set_item_key_unsafe(struct btrfs_root
*root
,
2643 struct btrfs_path
*path
,
2644 struct btrfs_key
*new_key
);
2647 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2648 struct btrfs_root
*tree_root
,
2649 u64 root_id
, u8 type
, u64 ref_id
,
2650 u64 dirid
, u64 sequence
,
2651 const char *name
, int name_len
);
2652 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2653 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2655 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2656 struct btrfs_key
*key
);
2657 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2658 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2660 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2661 btrfs_root_item
*item
, struct btrfs_key
*key
);
2663 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2664 *root
, const char *name
, int name_len
, u64 dir
,
2665 struct btrfs_key
*location
, u8 type
, u64 index
);
2666 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2667 struct btrfs_root
*root
,
2668 struct btrfs_path
*path
, u64 dir
,
2669 const char *name
, int name_len
,
2671 struct btrfs_dir_item
*btrfs_lookup_dir_index(struct btrfs_trans_handle
*trans
,
2672 struct btrfs_root
*root
,
2673 struct btrfs_path
*path
, u64 dir
,
2674 const char *name
, int name_len
,
2675 u64 index
, int mod
);
2676 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2677 struct btrfs_root
*root
,
2678 struct btrfs_path
*path
,
2679 struct btrfs_dir_item
*di
);
2680 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2681 struct btrfs_root
*root
, const char *name
,
2682 u16 name_len
, const void *data
, u16 data_len
,
2685 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2686 struct btrfs_root
*fs_root
,
2687 u64 dirid
, u64
*objectid
);
2690 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2691 struct btrfs_root
*root
,
2692 const char *name
, int name_len
,
2693 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2694 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2695 *root
, u64 objectid
, struct btrfs_inode_item
2697 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2698 *root
, struct btrfs_path
*path
,
2699 struct btrfs_key
*location
, int mod
);
2700 struct btrfs_inode_extref
*btrfs_lookup_inode_extref(struct btrfs_trans_handle
2701 *trans
, struct btrfs_path
*path
, struct btrfs_root
*root
,
2702 u64 ino
, u64 parent_ino
, u64 index
, const char *name
,
2703 int namelen
, int ins_len
);
2704 int btrfs_del_inode_extref(struct btrfs_trans_handle
*trans
,
2705 struct btrfs_root
*root
,
2706 const char *name
, int name_len
,
2707 u64 inode_objectid
, u64 ref_objectid
,
2709 int btrfs_insert_inode_extref(struct btrfs_trans_handle
*trans
,
2710 struct btrfs_root
*root
,
2711 const char *name
, int name_len
,
2712 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2713 struct btrfs_inode_ref
*btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2714 struct btrfs_root
*root
, struct btrfs_path
*path
,
2715 const char *name
, int namelen
, u64 ino
, u64 parent_ino
,
2717 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2718 struct btrfs_root
*root
, const char *name
, int name_len
,
2719 u64 ino
, u64 parent_ino
, u64
*index
);
2722 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2723 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2724 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2725 struct btrfs_root
*root
,
2726 u64 objectid
, u64 pos
, u64 offset
,
2729 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
2730 struct btrfs_root
*root
, u64 objectid
,
2731 u64 offset
, char *buffer
, size_t size
);
2732 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
2733 struct btrfs_root
*root
, u64 alloc_end
,
2734 u64 bytenr
, char *data
, size_t len
);
2735 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2736 struct btrfs_root
*root
, struct btrfs_path
*path
,
2740 int btrfs_lookup_uuid_subvol_item(int fd
, const u8
*uuid
, u64
*subvol_id
);
2741 int btrfs_lookup_uuid_received_subvol_item(int fd
, const u8
*uuid
,
2744 static inline int is_fstree(u64 rootid
)
2746 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
2747 (signed long long)rootid
>= (signed long long)BTRFS_FIRST_FREE_OBJECTID
)
2753 int check_dir_conflict(struct btrfs_root
*root
, char *name
, int namelen
,
2754 u64 dir
, u64 index
);
2755 int btrfs_new_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2757 int btrfs_change_inode_flags(struct btrfs_trans_handle
*trans
,
2758 struct btrfs_root
*root
, u64 ino
, u64 flags
);
2759 int btrfs_add_link(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2760 u64 ino
, u64 parent_ino
, char *name
, int namelen
,
2761 u8 type
, u64
*index
, int add_backref
);
2762 int btrfs_unlink(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2763 u64 ino
, u64 parent_ino
, u64 index
, const char *name
,
2764 int namelen
, int add_orphan
);
2765 int btrfs_add_orphan_item(struct btrfs_trans_handle
*trans
,
2766 struct btrfs_root
*root
, struct btrfs_path
*path
,
2768 int btrfs_mkdir(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2769 char *name
, int namelen
, u64 parent_ino
, u64
*ino
, int mode
);
2772 int btrfs_get_extent(struct btrfs_trans_handle
*trans
,
2773 struct btrfs_root
*root
,
2774 struct btrfs_path
*path
,
2775 u64 ino
, u64 offset
, u64 len
, int ins_len
);
2776 int btrfs_punch_hole(struct btrfs_trans_handle
*trans
,
2777 struct btrfs_root
*root
,
2778 u64 ino
, u64 offset
, u64 len
);