2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE_H__
20 #define __BTRFS_CTREE_H__
22 #if BTRFS_FLAT_INCLUDES
24 #include "kerncompat.h"
25 #include "radix-tree.h"
26 #include "extent-cache.h"
27 #include "extent_io.h"
30 #include <btrfs/list.h>
31 #include <btrfs/kerncompat.h>
32 #include <btrfs/radix-tree.h>
33 #include <btrfs/extent-cache.h>
34 #include <btrfs/extent_io.h>
35 #include <btrfs/ioctl.h>
36 #endif /* BTRFS_FLAT_INCLUDES */
39 struct btrfs_trans_handle
;
40 struct btrfs_free_space_ctl
;
41 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
43 #define BTRFS_MAX_MIRRORS 3
45 #define BTRFS_MAX_LEVEL 8
47 #define BTRFS_COMPAT_EXTENT_TREE_V0
49 /* holds pointers to all of the tree roots */
50 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
52 /* stores information about which extents are in use, and reference counts */
53 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
56 * chunk tree stores translations from logical -> physical block numbering
57 * the super block points to the chunk tree
59 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
62 * stores information about which areas of a given device are in use.
63 * one per device. The tree of tree roots points to the device tree
65 #define BTRFS_DEV_TREE_OBJECTID 4ULL
67 /* one per subvolume, storing files and directories */
68 #define BTRFS_FS_TREE_OBJECTID 5ULL
70 /* directory objectid inside the root tree */
71 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
72 /* holds checksums of all the data extents */
73 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
74 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
76 /* for storing items that use the BTRFS_UUID_KEY* */
77 #define BTRFS_UUID_TREE_OBJECTID 9ULL
79 /* tracks free space in block groups. */
80 #define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
82 /* for storing balance parameters in the root tree */
83 #define BTRFS_BALANCE_OBJECTID -4ULL
85 /* oprhan objectid for tracking unlinked/truncated files */
86 #define BTRFS_ORPHAN_OBJECTID -5ULL
88 /* does write ahead logging to speed up fsyncs */
89 #define BTRFS_TREE_LOG_OBJECTID -6ULL
90 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
93 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
94 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
97 * extent checksums all have this objectid
98 * this allows them to share the logging tree
101 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
103 /* For storing free space cache */
104 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
107 * The inode number assigned to the special inode for sotring
110 #define BTRFS_FREE_INO_OBJECTID -12ULL
112 /* dummy objectid represents multiple objectids */
113 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
116 * All files have objectids in this range.
118 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
119 #define BTRFS_LAST_FREE_OBJECTID -256ULL
120 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
125 * the device items go into the chunk tree. The key is in the form
126 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
128 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
131 * the max metadata block size. This limit is somewhat artificial,
132 * but the memmove costs go through the roof for larger blocks.
134 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
137 * we can actually store much bigger names, but lets not confuse the rest
140 #define BTRFS_NAME_LEN 255
143 * Theoretical limit is larger, but we keep this down to a sane
144 * value. That should limit greatly the possibility of collisions on
147 #define BTRFS_LINK_MAX 65535U
149 /* 32 bytes in various csum fields */
150 #define BTRFS_CSUM_SIZE 32
153 #define BTRFS_CSUM_TYPE_CRC32 0
155 static int btrfs_csum_sizes
[] = { 4 };
157 /* four bytes for CRC32 */
158 #define BTRFS_CRC32_SIZE 4
159 #define BTRFS_EMPTY_DIR_SIZE 0
161 #define BTRFS_FT_UNKNOWN 0
162 #define BTRFS_FT_REG_FILE 1
163 #define BTRFS_FT_DIR 2
164 #define BTRFS_FT_CHRDEV 3
165 #define BTRFS_FT_BLKDEV 4
166 #define BTRFS_FT_FIFO 5
167 #define BTRFS_FT_SOCK 6
168 #define BTRFS_FT_SYMLINK 7
169 #define BTRFS_FT_XATTR 8
170 #define BTRFS_FT_MAX 9
172 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
175 * the key defines the order in the tree, and so it also defines (optimal)
176 * block layout. objectid corresonds to the inode number. The flags
177 * tells us things about the object, and is a kind of stream selector.
178 * so for a given inode, keys with flags of 1 might refer to the inode
179 * data, flags of 2 may point to file data in the btree and flags == 3
180 * may point to extents.
182 * offset is the starting byte offset for this key in the stream.
184 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
185 * in cpu native order. Otherwise they are identical and their sizes
186 * should be the same (ie both packed)
188 struct btrfs_disk_key
{
192 } __attribute__ ((__packed__
));
198 } __attribute__ ((__packed__
));
200 struct btrfs_mapping_tree
{
201 struct cache_tree cache_tree
;
204 #define BTRFS_UUID_SIZE 16
205 struct btrfs_dev_item
{
206 /* the internal btrfs device id */
209 /* size of the device */
215 /* optimal io alignment for this device */
218 /* optimal io width for this device */
221 /* minimal io size for this device */
224 /* type and info about this device */
227 /* expected generation for this device */
231 * starting byte of this partition on the device,
232 * to allowr for stripe alignment in the future
236 /* grouping information for allocation decisions */
239 /* seek speed 0-100 where 100 is fastest */
242 /* bandwidth 0-100 where 100 is fastest */
245 /* btrfs generated uuid for this device */
246 u8 uuid
[BTRFS_UUID_SIZE
];
248 /* uuid of FS who owns this device */
249 u8 fsid
[BTRFS_UUID_SIZE
];
250 } __attribute__ ((__packed__
));
252 struct btrfs_stripe
{
255 u8 dev_uuid
[BTRFS_UUID_SIZE
];
256 } __attribute__ ((__packed__
));
259 /* size of this chunk in bytes */
262 /* objectid of the root referencing this chunk */
268 /* optimal io alignment for this chunk */
271 /* optimal io width for this chunk */
274 /* minimal io size for this chunk */
277 /* 2^16 stripes is quite a lot, a second limit is the size of a single
282 /* sub stripes only matter for raid10 */
284 struct btrfs_stripe stripe
;
285 /* additional stripes go here */
286 } __attribute__ ((__packed__
));
288 #define BTRFS_FREE_SPACE_EXTENT 1
289 #define BTRFS_FREE_SPACE_BITMAP 2
291 struct btrfs_free_space_entry
{
295 } __attribute__ ((__packed__
));
297 struct btrfs_free_space_header
{
298 struct btrfs_disk_key location
;
302 } __attribute__ ((__packed__
));
304 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
306 BUG_ON(num_stripes
== 0);
307 return sizeof(struct btrfs_chunk
) +
308 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
311 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
312 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
313 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
314 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
315 #define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
316 #define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
318 #define BTRFS_BACKREF_REV_MAX 256
319 #define BTRFS_BACKREF_REV_SHIFT 56
320 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
321 BTRFS_BACKREF_REV_SHIFT)
323 #define BTRFS_OLD_BACKREF_REV 0
324 #define BTRFS_MIXED_BACKREF_REV 1
327 * every tree block (leaf or node) starts with this header.
329 struct btrfs_header
{
330 /* these first four must match the super block */
331 u8 csum
[BTRFS_CSUM_SIZE
];
332 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
333 __le64 bytenr
; /* which block this node is supposed to live in */
336 /* allowed to be different from the super from here on down */
337 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
342 } __attribute__ ((__packed__
));
344 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
345 sizeof(struct btrfs_header)) / \
346 sizeof(struct btrfs_key_ptr))
347 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
348 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
349 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
350 sizeof(struct btrfs_item) - \
351 sizeof(struct btrfs_file_extent_item))
352 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
353 sizeof(struct btrfs_item) -\
354 sizeof(struct btrfs_dir_item))
358 * this is a very generous portion of the super block, giving us
359 * room to translate 14 chunks with 3 stripes each.
361 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
362 #define BTRFS_LABEL_SIZE 256
365 * just in case we somehow lose the roots and are not able to mount,
366 * we store an array of the roots from previous transactions
369 #define BTRFS_NUM_BACKUP_ROOTS 4
370 struct btrfs_root_backup
{
372 __le64 tree_root_gen
;
375 __le64 chunk_root_gen
;
378 __le64 extent_root_gen
;
387 __le64 csum_root_gen
;
397 u8 extent_root_level
;
401 /* future and to align */
403 } __attribute__ ((__packed__
));
406 * the super block basically lists the main trees of the FS
407 * it currently lacks any block count etc etc
409 struct btrfs_super_block
{
410 u8 csum
[BTRFS_CSUM_SIZE
];
411 /* the first 3 fields must match struct btrfs_header */
412 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
413 __le64 bytenr
; /* this block number */
416 /* allowed to be different from the btrfs_header from here own down */
423 /* this will help find the new super based on the log root */
424 __le64 log_root_transid
;
427 __le64 root_dir_objectid
;
433 __le32 sys_chunk_array_size
;
434 __le64 chunk_root_generation
;
436 __le64 compat_ro_flags
;
437 __le64 incompat_flags
;
442 struct btrfs_dev_item dev_item
;
444 char label
[BTRFS_LABEL_SIZE
];
446 __le64 cache_generation
;
447 __le64 uuid_tree_generation
;
449 /* future expansion */
451 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
452 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
453 } __attribute__ ((__packed__
));
456 * Compat flags that we support. If any incompat flags are set other than the
457 * ones specified below then we will fail to mount
459 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
461 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
462 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
463 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
464 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
467 * some patches floated around with a second compression method
468 * lets save that incompat here for when they do get in
469 * Note we don't actually support it, we're just reserving the
472 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
475 * older kernels tried to do bigger metadata blocks, but the
476 * code was pretty buggy. Lets not let them try anymore.
478 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
479 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
480 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
481 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
482 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
484 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
486 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
487 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
489 #define BTRFS_FEATURE_INCOMPAT_SUPP \
490 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
491 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
492 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
493 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
494 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
495 BTRFS_FEATURE_INCOMPAT_RAID56 | \
496 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
497 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
498 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
501 * A leaf is full of items. offset and size tell us where to find
502 * the item in the leaf (relative to the start of the data area)
505 struct btrfs_disk_key key
;
508 } __attribute__ ((__packed__
));
511 * leaves have an item area and a data area:
512 * [item0, item1....itemN] [free space] [dataN...data1, data0]
514 * The data is separate from the items to get the keys closer together
518 struct btrfs_header header
;
519 struct btrfs_item items
[];
520 } __attribute__ ((__packed__
));
523 * all non-leaf blocks are nodes, they hold only keys and pointers to
526 struct btrfs_key_ptr
{
527 struct btrfs_disk_key key
;
530 } __attribute__ ((__packed__
));
533 struct btrfs_header header
;
534 struct btrfs_key_ptr ptrs
[];
535 } __attribute__ ((__packed__
));
538 * btrfs_paths remember the path taken from the root down to the leaf.
539 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
540 * to any other levels that are present.
542 * The slots array records the index of the item or block pointer
543 * used while walking the tree.
547 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
548 int slots
[BTRFS_MAX_LEVEL
];
549 /* if there is real range locking, this locks field will change */
550 int locks
[BTRFS_MAX_LEVEL
];
552 /* keep some upper locks as we walk down */
556 * set by btrfs_split_item, tells search_slot to keep all locks
557 * and to force calls to keep space in the nodes
559 unsigned int search_for_split
:1;
560 unsigned int skip_check_block
:1;
564 * items in the extent btree are used to record the objectid of the
565 * owner of the block and the number of references
568 struct btrfs_extent_item
{
572 } __attribute__ ((__packed__
));
574 struct btrfs_extent_item_v0
{
576 } __attribute__ ((__packed__
));
578 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
579 sizeof(struct btrfs_item))
581 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
582 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
584 /* following flags only apply to tree blocks */
586 /* use full backrefs for extent pointers in the block*/
587 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
589 struct btrfs_tree_block_info
{
590 struct btrfs_disk_key key
;
592 } __attribute__ ((__packed__
));
594 struct btrfs_extent_data_ref
{
599 } __attribute__ ((__packed__
));
601 struct btrfs_shared_data_ref
{
603 } __attribute__ ((__packed__
));
605 struct btrfs_extent_inline_ref
{
608 } __attribute__ ((__packed__
));
610 struct btrfs_extent_ref_v0
{
615 } __attribute__ ((__packed__
));
617 /* dev extents record free space on individual devices. The owner
618 * field points back to the chunk allocation mapping tree that allocated
619 * the extent. The chunk tree uuid field is a way to double check the owner
621 struct btrfs_dev_extent
{
623 __le64 chunk_objectid
;
626 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
627 } __attribute__ ((__packed__
));
629 struct btrfs_inode_ref
{
633 } __attribute__ ((__packed__
));
635 struct btrfs_inode_extref
{
636 __le64 parent_objectid
;
639 __u8 name
[0]; /* name goes here */
640 } __attribute__ ((__packed__
));
642 struct btrfs_timespec
{
645 } __attribute__ ((__packed__
));
648 BTRFS_COMPRESS_NONE
= 0,
649 BTRFS_COMPRESS_ZLIB
= 1,
650 BTRFS_COMPRESS_LZO
= 2,
651 BTRFS_COMPRESS_TYPES
= 2,
652 BTRFS_COMPRESS_LAST
= 3,
653 } btrfs_compression_type
;
655 /* we don't understand any encryption methods right now */
657 BTRFS_ENCRYPTION_NONE
= 0,
658 BTRFS_ENCRYPTION_LAST
= 1,
659 } btrfs_encryption_type
;
661 enum btrfs_tree_block_status
{
662 BTRFS_TREE_BLOCK_CLEAN
,
663 BTRFS_TREE_BLOCK_INVALID_NRITEMS
,
664 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY
,
665 BTRFS_TREE_BLOCK_BAD_KEY_ORDER
,
666 BTRFS_TREE_BLOCK_INVALID_LEVEL
,
667 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE
,
668 BTRFS_TREE_BLOCK_INVALID_OFFSETS
,
671 struct btrfs_inode_item
{
672 /* nfs style generation number */
674 /* transid that last touched this inode */
686 /* modification sequence number for NFS */
690 * a little future expansion, for more than this we can
691 * just grow the inode item and version it
694 struct btrfs_timespec atime
;
695 struct btrfs_timespec ctime
;
696 struct btrfs_timespec mtime
;
697 struct btrfs_timespec otime
;
698 } __attribute__ ((__packed__
));
700 struct btrfs_dir_log_item
{
702 } __attribute__ ((__packed__
));
704 struct btrfs_dir_item
{
705 struct btrfs_disk_key location
;
710 } __attribute__ ((__packed__
));
712 struct btrfs_root_item_v0
{
713 struct btrfs_inode_item inode
;
719 __le64 last_snapshot
;
722 struct btrfs_disk_key drop_progress
;
725 } __attribute__ ((__packed__
));
727 struct btrfs_root_item
{
728 struct btrfs_inode_item inode
;
734 __le64 last_snapshot
;
737 struct btrfs_disk_key drop_progress
;
742 * The following fields appear after subvol_uuids+subvol_times
747 * This generation number is used to test if the new fields are valid
748 * and up to date while reading the root item. Everytime the root item
749 * is written out, the "generation" field is copied into this field. If
750 * anyone ever mounted the fs with an older kernel, we will have
751 * mismatching generation values here and thus must invalidate the
752 * new fields. See btrfs_update_root and btrfs_find_last_root for
754 * the offset of generation_v2 is also used as the start for the memset
755 * when invalidating the fields.
757 __le64 generation_v2
;
758 u8 uuid
[BTRFS_UUID_SIZE
];
759 u8 parent_uuid
[BTRFS_UUID_SIZE
];
760 u8 received_uuid
[BTRFS_UUID_SIZE
];
761 __le64 ctransid
; /* updated when an inode changes */
762 __le64 otransid
; /* trans when created */
763 __le64 stransid
; /* trans when sent. non-zero for received subvol */
764 __le64 rtransid
; /* trans when received. non-zero for received subvol */
765 struct btrfs_timespec ctime
;
766 struct btrfs_timespec otime
;
767 struct btrfs_timespec stime
;
768 struct btrfs_timespec rtime
;
769 __le64 reserved
[8]; /* for future */
770 } __attribute__ ((__packed__
));
773 * this is used for both forward and backward root refs
775 struct btrfs_root_ref
{
779 } __attribute__ ((__packed__
));
781 #define BTRFS_FILE_EXTENT_INLINE 0
782 #define BTRFS_FILE_EXTENT_REG 1
783 #define BTRFS_FILE_EXTENT_PREALLOC 2
785 struct btrfs_file_extent_item
{
787 * transaction id that created this extent
791 * max number of bytes to hold this extent in ram
792 * when we split a compressed extent we can't know how big
793 * each of the resulting pieces will be. So, this is
794 * an upper limit on the size of the extent in ram instead of
800 * 32 bits for the various ways we might encode the data,
801 * including compression and encryption. If any of these
802 * are set to something a given disk format doesn't understand
803 * it is treated like an incompat flag for reading and writing,
808 __le16 other_encoding
; /* spare for later use */
810 /* are we inline data or a real extent? */
814 * disk space consumed by the extent, checksum blocks are included
818 __le64 disk_num_bytes
;
820 * the logical offset in file blocks (no csums)
821 * this extent record is for. This allows a file extent to point
822 * into the middle of an existing extent on disk, sharing it
823 * between two snapshots (useful if some bytes in the middle of the
824 * extent have changed
828 * the logical number of file blocks (no csums included)
832 } __attribute__ ((__packed__
));
834 struct btrfs_csum_item
{
836 } __attribute__ ((__packed__
));
839 * We don't want to overwrite 1M at the beginning of device, even though
840 * there is our 1st superblock at 64k. Some possible reasons:
841 * - the first 64k blank is useful for some boot loader/manager
842 * - the first 1M could be scratched by buggy partitioner or somesuch
844 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
846 /* tag for the radix tree of block groups in ram */
847 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
848 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
849 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
850 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
851 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
852 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
853 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
854 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
855 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
856 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
857 #define BTRFS_NR_RAID_TYPES 7
859 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
860 BTRFS_BLOCK_GROUP_SYSTEM | \
861 BTRFS_BLOCK_GROUP_METADATA)
863 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
864 BTRFS_BLOCK_GROUP_RAID1 | \
865 BTRFS_BLOCK_GROUP_RAID5 | \
866 BTRFS_BLOCK_GROUP_RAID6 | \
867 BTRFS_BLOCK_GROUP_DUP | \
868 BTRFS_BLOCK_GROUP_RAID10)
870 /* used in struct btrfs_balance_args fields */
871 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
874 * GLOBAL_RSV does not exist as a on-disk block group type and is used
875 * internally for exporting info about global block reserve from space infos
877 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
879 #define BTRFS_QGROUP_LEVEL_SHIFT 48
881 static inline u64
btrfs_qgroup_level(u64 qgroupid
)
883 return qgroupid
>> BTRFS_QGROUP_LEVEL_SHIFT
;
886 static inline u64
btrfs_qgroup_subvid(u64 qgroupid
)
888 return qgroupid
& ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT
) - 1);
891 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
892 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
893 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
895 struct btrfs_qgroup_status_item
{
899 __le64 scan
; /* progress during scanning */
900 } __attribute__ ((__packed__
));
902 struct btrfs_block_group_item
{
904 __le64 chunk_objectid
;
906 } __attribute__ ((__packed__
));
908 struct btrfs_free_space_info
{
911 } __attribute__ ((__packed__
));
913 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
915 struct btrfs_qgroup_info_item
{
918 __le64 referenced_compressed
;
920 __le64 exclusive_compressed
;
921 } __attribute__ ((__packed__
));
923 /* flags definition for qgroup limits */
924 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
925 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
926 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
927 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
928 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
929 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
931 struct btrfs_qgroup_limit_item
{
933 __le64 max_referenced
;
934 __le64 max_exclusive
;
935 __le64 rsv_referenced
;
936 __le64 rsv_exclusive
;
937 } __attribute__ ((__packed__
));
939 struct btrfs_space_info
{
945 struct list_head list
;
948 struct btrfs_block_group_cache
{
949 struct cache_extent cache
;
950 struct btrfs_key key
;
951 struct btrfs_block_group_item item
;
952 struct btrfs_space_info
*space_info
;
953 struct btrfs_free_space_ctl
*free_space_ctl
;
961 struct btrfs_extent_ops
{
962 int (*alloc_extent
)(struct btrfs_root
*root
, u64 num_bytes
,
963 u64 hint_byte
, struct btrfs_key
*ins
, int metadata
);
964 int (*free_extent
)(struct btrfs_root
*root
, u64 bytenr
,
969 struct btrfs_fs_devices
;
970 struct btrfs_fs_info
{
971 u8 fsid
[BTRFS_FSID_SIZE
];
973 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
974 u8
*new_chunk_tree_uuid
;
975 struct btrfs_root
*fs_root
;
976 struct btrfs_root
*extent_root
;
977 struct btrfs_root
*tree_root
;
978 struct btrfs_root
*chunk_root
;
979 struct btrfs_root
*dev_root
;
980 struct btrfs_root
*csum_root
;
981 struct btrfs_root
*quota_root
;
982 struct btrfs_root
*free_space_root
;
984 struct rb_root fs_root_tree
;
986 /* the log root tree is a directory of all the other log roots */
987 struct btrfs_root
*log_root_tree
;
989 struct extent_io_tree extent_cache
;
990 struct extent_io_tree free_space_cache
;
991 struct extent_io_tree block_group_cache
;
992 struct extent_io_tree pinned_extents
;
993 struct extent_io_tree pending_del
;
994 struct extent_io_tree extent_ins
;
995 struct extent_io_tree
*excluded_extents
;
997 /* logical->physical extent mapping */
998 struct btrfs_mapping_tree mapping_tree
;
1001 u64 last_trans_committed
;
1003 u64 avail_data_alloc_bits
;
1004 u64 avail_metadata_alloc_bits
;
1005 u64 avail_system_alloc_bits
;
1006 u64 data_alloc_profile
;
1007 u64 metadata_alloc_profile
;
1008 u64 system_alloc_profile
;
1011 struct btrfs_trans_handle
*running_transaction
;
1012 struct btrfs_super_block
*super_copy
;
1013 struct mutex fs_mutex
;
1018 struct btrfs_extent_ops
*extent_ops
;
1019 struct list_head dirty_cowonly_roots
;
1020 struct list_head recow_ebs
;
1022 struct btrfs_fs_devices
*fs_devices
;
1023 struct list_head space_info
;
1026 unsigned int readonly
:1;
1027 unsigned int on_restoring
:1;
1028 unsigned int is_chunk_recover
:1;
1029 unsigned int quota_enabled
:1;
1030 unsigned int suppress_check_block_errors
:1;
1031 unsigned int ignore_fsid_mismatch
:1;
1032 unsigned int ignore_chunk_tree_error
:1;
1034 int (*free_extent_hook
)(struct btrfs_trans_handle
*trans
,
1035 struct btrfs_root
*root
,
1036 u64 bytenr
, u64 num_bytes
, u64 parent
,
1037 u64 root_objectid
, u64 owner
, u64 offset
,
1039 struct cache_tree
*fsck_extent_cache
;
1040 struct cache_tree
*corrupt_blocks
;
1045 * in ram representation of the tree. extent_root is used for all allocations
1046 * and for the extent tree extent_root root.
1049 struct extent_buffer
*node
;
1050 struct extent_buffer
*commit_root
;
1051 struct btrfs_root_item root_item
;
1052 struct btrfs_key root_key
;
1053 struct btrfs_fs_info
*fs_info
;
1057 /* data allocations are done in sectorsize units */
1060 /* node allocations are done in nodesize units */
1063 /* leaf allocations are done in leafsize units */
1066 /* leaf allocations are done in leafsize units */
1075 u64 last_inode_alloc
;
1078 * Record orphan data extent ref
1080 * TODO: Don't restore things in btrfs_root.
1081 * Directly record it into inode_record, which needs a lot of
1082 * infrastructure change to allow cooperation between extent
1085 struct list_head orphan_data_extents
;
1087 /* the dirty list is only used by non-reference counted roots */
1088 struct list_head dirty_list
;
1089 struct rb_node rb_node
;
1093 * inode items have the data typically returned from stat and store other
1094 * info about object characteristics. There is one for every file and dir in
1097 #define BTRFS_INODE_ITEM_KEY 1
1098 #define BTRFS_INODE_REF_KEY 12
1099 #define BTRFS_INODE_EXTREF_KEY 13
1100 #define BTRFS_XATTR_ITEM_KEY 24
1101 #define BTRFS_ORPHAN_ITEM_KEY 48
1103 #define BTRFS_DIR_LOG_ITEM_KEY 60
1104 #define BTRFS_DIR_LOG_INDEX_KEY 72
1106 * dir items are the name -> inode pointers in a directory. There is one
1107 * for every name in a directory.
1109 #define BTRFS_DIR_ITEM_KEY 84
1110 #define BTRFS_DIR_INDEX_KEY 96
1113 * extent data is for file data
1115 #define BTRFS_EXTENT_DATA_KEY 108
1118 * csum items have the checksums for data in the extents
1120 #define BTRFS_CSUM_ITEM_KEY 120
1122 * extent csums are stored in a separate tree and hold csums for
1123 * an entire extent on disk.
1125 #define BTRFS_EXTENT_CSUM_KEY 128
1128 * root items point to tree roots. There are typically in the root
1129 * tree used by the super block to find all the other trees
1131 #define BTRFS_ROOT_ITEM_KEY 132
1134 * root backrefs tie subvols and snapshots to the directory entries that
1137 #define BTRFS_ROOT_BACKREF_KEY 144
1140 * root refs make a fast index for listing all of the snapshots and
1141 * subvolumes referenced by a given root. They point directly to the
1142 * directory item in the root that references the subvol
1144 #define BTRFS_ROOT_REF_KEY 156
1147 * extent items are in the extent map tree. These record which blocks
1148 * are used, and how many references there are to each block
1150 #define BTRFS_EXTENT_ITEM_KEY 168
1153 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1154 * the length, so we save the level in key->offset instead of the length.
1156 #define BTRFS_METADATA_ITEM_KEY 169
1158 #define BTRFS_TREE_BLOCK_REF_KEY 176
1160 #define BTRFS_EXTENT_DATA_REF_KEY 178
1162 /* old style extent backrefs */
1163 #define BTRFS_EXTENT_REF_V0_KEY 180
1165 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1167 #define BTRFS_SHARED_DATA_REF_KEY 184
1171 * block groups give us hints into the extent allocation trees. Which
1172 * blocks are free etc etc
1174 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1177 * Every block group is represented in the free space tree by a free space info
1178 * item, which stores some accounting information. It is keyed on
1179 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1181 #define BTRFS_FREE_SPACE_INFO_KEY 198
1184 * A free space extent tracks an extent of space that is free in a block group.
1185 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1187 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1190 * When a block group becomes very fragmented, we convert it to use bitmaps
1191 * instead of extents. A free space bitmap is keyed on
1192 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1193 * (length / sectorsize) bits.
1195 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1197 #define BTRFS_DEV_EXTENT_KEY 204
1198 #define BTRFS_DEV_ITEM_KEY 216
1199 #define BTRFS_CHUNK_ITEM_KEY 228
1201 #define BTRFS_BALANCE_ITEM_KEY 248
1206 #define BTRFS_QGROUP_STATUS_KEY 240
1207 #define BTRFS_QGROUP_INFO_KEY 242
1208 #define BTRFS_QGROUP_LIMIT_KEY 244
1209 #define BTRFS_QGROUP_RELATION_KEY 246
1212 * Persistently stores the io stats in the device tree.
1213 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1215 #define BTRFS_DEV_STATS_KEY 249
1218 * Persistently stores the device replace state in the device tree.
1219 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1221 #define BTRFS_DEV_REPLACE_KEY 250
1224 * Stores items that allow to quickly map UUIDs to something else.
1225 * These items are part of the filesystem UUID tree.
1226 * The key is built like this:
1227 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1229 #if BTRFS_UUID_SIZE != 16
1230 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1232 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1233 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1234 * received subvols */
1237 * string items are for debugging. They just store a short string of
1240 #define BTRFS_STRING_ITEM_KEY 253
1244 #define BTRFS_INODE_NODATASUM (1 << 0)
1245 #define BTRFS_INODE_NODATACOW (1 << 1)
1246 #define BTRFS_INODE_READONLY (1 << 2)
1248 #define read_eb_member(eb, ptr, type, member, result) ( \
1249 read_extent_buffer(eb, (char *)(result), \
1250 ((unsigned long)(ptr)) + \
1251 offsetof(type, member), \
1252 sizeof(((type *)0)->member)))
1254 #define write_eb_member(eb, ptr, type, member, result) ( \
1255 write_extent_buffer(eb, (char *)(result), \
1256 ((unsigned long)(ptr)) + \
1257 offsetof(type, member), \
1258 sizeof(((type *)0)->member)))
1260 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1261 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1263 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1264 return le##bits##_to_cpu(h->member); \
1266 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1269 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1270 h->member = cpu_to_le##bits(val); \
1273 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1274 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1277 unsigned long offset = (unsigned long)s; \
1278 const type *p = (type *) (eb->data + offset); \
1279 return get_unaligned_le##bits(&p->member); \
1281 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1282 type *s, u##bits val) \
1284 unsigned long offset = (unsigned long)s; \
1285 type *p = (type *) (eb->data + offset); \
1286 put_unaligned_le##bits(val, &p->member); \
1289 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1290 static inline u##bits btrfs_##name(const type *s) \
1292 return le##bits##_to_cpu(s->member); \
1294 static inline void btrfs_set_##name(type *s, u##bits val) \
1296 s->member = cpu_to_le##bits(val); \
1299 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1300 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1301 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1302 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1303 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1304 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1306 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1307 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1308 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1309 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1310 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1311 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1313 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1314 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1316 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1318 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1320 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1322 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1324 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1325 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1327 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1329 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1331 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1334 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1336 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1339 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1341 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1344 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1345 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1346 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1347 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1348 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1349 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1350 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1351 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1352 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1353 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1354 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1356 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1358 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1361 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1362 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1363 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1365 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1367 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1369 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1371 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1372 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1374 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1376 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1377 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1379 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1382 unsigned long offset
= (unsigned long)c
;
1383 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1384 offset
+= nr
* sizeof(struct btrfs_stripe
);
1385 return (struct btrfs_stripe
*)offset
;
1388 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1390 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1393 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1394 struct btrfs_chunk
*c
, int nr
)
1396 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1399 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1400 struct btrfs_chunk
*c
, int nr
,
1403 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1406 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1407 struct btrfs_chunk
*c
, int nr
)
1409 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1412 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1413 struct btrfs_chunk
*c
, int nr
,
1416 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1419 /* struct btrfs_block_group_item */
1420 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1422 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1424 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1425 struct btrfs_block_group_item
, chunk_objectid
, 64);
1427 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1428 struct btrfs_block_group_item
, chunk_objectid
, 64);
1429 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1430 struct btrfs_block_group_item
, flags
, 64);
1431 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1432 struct btrfs_block_group_item
, flags
, 64);
1434 /* struct btrfs_free_space_info */
1435 BTRFS_SETGET_FUNCS(free_space_extent_count
, struct btrfs_free_space_info
,
1437 BTRFS_SETGET_FUNCS(free_space_flags
, struct btrfs_free_space_info
, flags
, 32);
1439 /* struct btrfs_inode_ref */
1440 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1441 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1442 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1444 /* struct btrfs_inode_extref */
1445 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1446 parent_objectid
, 64);
1447 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1449 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1451 /* struct btrfs_inode_item */
1452 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1453 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1454 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1455 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1456 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1457 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1458 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1459 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1460 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1461 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1462 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1463 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1465 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
,
1466 struct btrfs_inode_item
, generation
, 64);
1467 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
,
1468 struct btrfs_inode_item
, sequence
, 64);
1469 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
,
1470 struct btrfs_inode_item
, transid
, 64);
1471 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
,
1472 struct btrfs_inode_item
, size
, 64);
1473 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
,
1474 struct btrfs_inode_item
, nbytes
, 64);
1475 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
,
1476 struct btrfs_inode_item
, block_group
, 64);
1477 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
,
1478 struct btrfs_inode_item
, nlink
, 32);
1479 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
,
1480 struct btrfs_inode_item
, uid
, 32);
1481 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
,
1482 struct btrfs_inode_item
, gid
, 32);
1483 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
,
1484 struct btrfs_inode_item
, mode
, 32);
1485 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
,
1486 struct btrfs_inode_item
, rdev
, 64);
1487 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
,
1488 struct btrfs_inode_item
, flags
, 64);
1490 static inline struct btrfs_timespec
*
1491 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1493 unsigned long ptr
= (unsigned long)inode_item
;
1494 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1495 return (struct btrfs_timespec
*)ptr
;
1498 static inline struct btrfs_timespec
*
1499 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1501 unsigned long ptr
= (unsigned long)inode_item
;
1502 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1503 return (struct btrfs_timespec
*)ptr
;
1506 static inline struct btrfs_timespec
*
1507 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1509 unsigned long ptr
= (unsigned long)inode_item
;
1510 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1511 return (struct btrfs_timespec
*)ptr
;
1514 static inline struct btrfs_timespec
*
1515 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1517 unsigned long ptr
= (unsigned long)inode_item
;
1518 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1519 return (struct btrfs_timespec
*)ptr
;
1522 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1523 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1524 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
,
1526 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
,
1529 /* struct btrfs_dev_extent */
1530 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1532 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1533 chunk_objectid
, 64);
1534 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1536 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1538 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length
, struct btrfs_dev_extent
,
1541 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1543 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1544 return (u8
*)((unsigned long)dev
+ ptr
);
1548 /* struct btrfs_extent_item */
1549 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1550 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
, refs
, 64);
1551 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1553 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1554 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags
, struct btrfs_extent_item
, flags
, 64);
1556 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1558 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1560 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1561 struct btrfs_tree_block_info
*item
,
1562 struct btrfs_disk_key
*key
)
1564 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1567 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1568 struct btrfs_tree_block_info
*item
,
1569 struct btrfs_disk_key
*key
)
1571 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1574 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1576 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1578 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1580 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1583 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1586 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1588 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1590 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type
,
1591 struct btrfs_extent_inline_ref
, type
, 8);
1592 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset
,
1593 struct btrfs_extent_inline_ref
, offset
, 64);
1595 static inline u32
btrfs_extent_inline_ref_size(int type
)
1597 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1598 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1599 return sizeof(struct btrfs_extent_inline_ref
);
1600 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1601 return sizeof(struct btrfs_shared_data_ref
) +
1602 sizeof(struct btrfs_extent_inline_ref
);
1603 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1604 return sizeof(struct btrfs_extent_data_ref
) +
1605 offsetof(struct btrfs_extent_inline_ref
, offset
);
1610 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1611 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1613 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1614 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1616 /* struct btrfs_node */
1617 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1618 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1620 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1623 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1624 sizeof(struct btrfs_key_ptr
) * nr
;
1625 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1628 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1632 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1633 sizeof(struct btrfs_key_ptr
) * nr
;
1634 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1637 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1640 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1641 sizeof(struct btrfs_key_ptr
) * nr
;
1642 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1645 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1649 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1650 sizeof(struct btrfs_key_ptr
) * nr
;
1651 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1654 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1656 return offsetof(struct btrfs_node
, ptrs
) +
1657 sizeof(struct btrfs_key_ptr
) * nr
;
1660 static inline void btrfs_node_key(struct extent_buffer
*eb
,
1661 struct btrfs_disk_key
*disk_key
, int nr
)
1664 ptr
= btrfs_node_key_ptr_offset(nr
);
1665 read_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1666 struct btrfs_key_ptr
, key
, disk_key
);
1669 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1670 struct btrfs_disk_key
*disk_key
, int nr
)
1673 ptr
= btrfs_node_key_ptr_offset(nr
);
1674 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1675 struct btrfs_key_ptr
, key
, disk_key
);
1678 /* struct btrfs_item */
1679 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1680 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1682 static inline unsigned long btrfs_item_nr_offset(int nr
)
1684 return offsetof(struct btrfs_leaf
, items
) +
1685 sizeof(struct btrfs_item
) * nr
;
1688 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1690 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1693 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1694 struct btrfs_item
*item
)
1696 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1699 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1701 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
1704 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1706 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
1709 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1711 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
1714 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1715 struct btrfs_disk_key
*disk_key
, int nr
)
1717 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1718 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1721 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1722 struct btrfs_disk_key
*disk_key
, int nr
)
1724 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1725 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1728 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1731 * struct btrfs_root_ref
1733 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1734 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1735 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1737 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1738 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1739 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1741 /* struct btrfs_dir_item */
1742 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1743 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1744 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1745 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1747 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1749 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1750 struct btrfs_dir_item
*item
,
1751 struct btrfs_disk_key
*key
)
1753 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1756 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1757 struct btrfs_dir_item
*item
,
1758 struct btrfs_disk_key
*key
)
1760 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1763 /* struct btrfs_free_space_header */
1764 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1766 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1768 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1771 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1772 struct btrfs_free_space_header
*h
,
1773 struct btrfs_disk_key
*key
)
1775 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1778 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1779 struct btrfs_free_space_header
*h
,
1780 struct btrfs_disk_key
*key
)
1782 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1785 /* struct btrfs_disk_key */
1786 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1788 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1789 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1791 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1792 struct btrfs_disk_key
*disk
)
1794 cpu
->offset
= le64_to_cpu(disk
->offset
);
1795 cpu
->type
= disk
->type
;
1796 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1799 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1800 struct btrfs_key
*cpu
)
1802 disk
->offset
= cpu_to_le64(cpu
->offset
);
1803 disk
->type
= cpu
->type
;
1804 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1807 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1808 struct btrfs_key
*key
, int nr
)
1810 struct btrfs_disk_key disk_key
;
1811 btrfs_node_key(eb
, &disk_key
, nr
);
1812 btrfs_disk_key_to_cpu(key
, &disk_key
);
1815 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1816 struct btrfs_key
*key
, int nr
)
1818 struct btrfs_disk_key disk_key
;
1819 btrfs_item_key(eb
, &disk_key
, nr
);
1820 btrfs_disk_key_to_cpu(key
, &disk_key
);
1823 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1824 struct btrfs_dir_item
*item
,
1825 struct btrfs_key
*key
)
1827 struct btrfs_disk_key disk_key
;
1828 btrfs_dir_item_key(eb
, item
, &disk_key
);
1829 btrfs_disk_key_to_cpu(key
, &disk_key
);
1833 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1838 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1843 /* struct btrfs_header */
1844 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1845 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1847 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1848 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1849 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1850 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1851 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
1852 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
, nritems
,
1854 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
1855 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
1858 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1860 return (btrfs_header_flags(eb
) & flag
) == flag
;
1863 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1865 u64 flags
= btrfs_header_flags(eb
);
1866 btrfs_set_header_flags(eb
, flags
| flag
);
1867 return (flags
& flag
) == flag
;
1870 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1872 u64 flags
= btrfs_header_flags(eb
);
1873 btrfs_set_header_flags(eb
, flags
& ~flag
);
1874 return (flags
& flag
) == flag
;
1877 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
1879 u64 flags
= btrfs_header_flags(eb
);
1880 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
1883 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
1886 u64 flags
= btrfs_header_flags(eb
);
1887 flags
&= ~BTRFS_BACKREF_REV_MASK
;
1888 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
1889 btrfs_set_header_flags(eb
, flags
);
1892 static inline unsigned long btrfs_header_fsid(void)
1894 return offsetof(struct btrfs_header
, fsid
);
1897 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1899 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
1902 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1904 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1908 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1910 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1914 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1919 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1924 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1929 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1931 return (btrfs_header_level(eb
) == 0);
1934 /* struct btrfs_root_item */
1935 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1937 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1938 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1939 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1941 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1943 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1944 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1945 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1946 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1947 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1948 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1949 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1950 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1952 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
1954 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
1956 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
1958 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
1960 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
1963 /* struct btrfs_root_backup */
1964 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
1966 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
1968 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
1969 tree_root_level
, 8);
1971 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
1973 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
1974 chunk_root_gen
, 64);
1975 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
1976 chunk_root_level
, 8);
1978 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
1980 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
1981 extent_root_gen
, 64);
1982 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
1983 extent_root_level
, 8);
1985 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
1987 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
1989 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
1992 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
1994 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
1996 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
1999 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2001 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2003 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2004 csum_root_level
, 8);
2005 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2007 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2009 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2012 /* struct btrfs_super_block */
2014 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2015 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2016 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2018 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2019 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2020 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2021 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2022 struct btrfs_super_block
, chunk_root_generation
, 64);
2023 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2025 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2027 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2028 chunk_root_level
, 8);
2029 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2031 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2032 log_root_transid
, 64);
2033 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2035 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2037 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2039 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2041 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2043 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2045 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2047 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2048 root_dir_objectid
, 64);
2049 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2051 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2053 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2054 compat_ro_flags
, 64);
2055 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2056 incompat_flags
, 64);
2057 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2059 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2060 cache_generation
, 64);
2061 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2062 uuid_tree_generation
, 64);
2063 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2065 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2067 int t
= btrfs_super_csum_type(s
);
2068 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
2069 return btrfs_csum_sizes
[t
];
2072 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2074 return offsetof(struct btrfs_leaf
, items
);
2077 /* struct btrfs_file_extent_item */
2078 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2079 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2081 static inline unsigned long btrfs_file_extent_inline_start(struct
2082 btrfs_file_extent_item
*e
)
2084 unsigned long offset
= (unsigned long)e
;
2085 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2089 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2091 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2094 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2096 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2098 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2100 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
, struct btrfs_file_extent_item
,
2102 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2103 disk_num_bytes
, 64);
2104 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2106 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
, struct btrfs_file_extent_item
,
2108 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2110 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
, struct btrfs_file_extent_item
,
2112 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2114 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2116 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2118 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
, struct btrfs_file_extent_item
,
2120 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2122 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2123 other_encoding
, 16);
2125 /* btrfs_qgroup_status_item */
2126 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2128 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2130 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2132 BTRFS_SETGET_FUNCS(qgroup_status_scan
, struct btrfs_qgroup_status_item
,
2135 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version
,
2136 struct btrfs_qgroup_status_item
, version
, 64);
2137 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation
,
2138 struct btrfs_qgroup_status_item
, generation
, 64);
2139 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags
,
2140 struct btrfs_qgroup_status_item
, flags
, 64);
2141 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_scan
,
2142 struct btrfs_qgroup_status_item
, scan
, 64);
2144 /* btrfs_qgroup_info_item */
2145 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2147 BTRFS_SETGET_FUNCS(qgroup_info_referenced
, struct btrfs_qgroup_info_item
,
2149 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed
,
2150 struct btrfs_qgroup_info_item
, referenced_compressed
, 64);
2151 BTRFS_SETGET_FUNCS(qgroup_info_exclusive
, struct btrfs_qgroup_info_item
,
2153 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed
,
2154 struct btrfs_qgroup_info_item
, exclusive_compressed
, 64);
2156 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2157 struct btrfs_qgroup_info_item
, generation
, 64);
2158 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced
,
2159 struct btrfs_qgroup_info_item
, referenced
, 64);
2160 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed
,
2161 struct btrfs_qgroup_info_item
, referenced_compressed
, 64);
2162 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive
,
2163 struct btrfs_qgroup_info_item
, exclusive
, 64);
2164 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed
,
2165 struct btrfs_qgroup_info_item
, exclusive_compressed
, 64);
2167 /* btrfs_qgroup_limit_item */
2168 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2170 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced
, struct btrfs_qgroup_limit_item
,
2171 max_referenced
, 64);
2172 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive
, struct btrfs_qgroup_limit_item
,
2174 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced
, struct btrfs_qgroup_limit_item
,
2175 rsv_referenced
, 64);
2176 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive
, struct btrfs_qgroup_limit_item
,
2179 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags
,
2180 struct btrfs_qgroup_limit_item
, flags
, 64);
2181 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced
,
2182 struct btrfs_qgroup_limit_item
, max_referenced
, 64);
2183 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive
,
2184 struct btrfs_qgroup_limit_item
, max_exclusive
, 64);
2185 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced
,
2186 struct btrfs_qgroup_limit_item
, rsv_referenced
, 64);
2187 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive
,
2188 struct btrfs_qgroup_limit_item
, rsv_exclusive
, 64);
2191 * this returns the number of bytes used by the item on disk, minus the
2192 * size of any extent headers. If a file is compressed on disk, this is
2193 * the compressed size
2195 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2196 struct btrfs_item
*e
)
2198 unsigned long offset
;
2199 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2200 return btrfs_item_size(eb
, e
) - offset
;
2203 /* this returns the number of file bytes represented by the inline item.
2204 * If an item is compressed, this is the uncompressed size
2206 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2208 struct btrfs_file_extent_item
*fi
)
2211 * return the space used on disk if this item isn't
2212 * compressed or encoded
2214 if (btrfs_file_extent_compression(eb
, fi
) == 0 &&
2215 btrfs_file_extent_encryption(eb
, fi
) == 0 &&
2216 btrfs_file_extent_other_encoding(eb
, fi
) == 0) {
2217 return btrfs_file_extent_inline_item_len(eb
,
2218 btrfs_item_nr(slot
));
2221 /* otherwise use the ram bytes field */
2222 return btrfs_file_extent_ram_bytes(eb
, fi
);
2225 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
2227 return root
->leafsize
;
2228 return root
->nodesize
;
2231 static inline int btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
2233 struct btrfs_super_block
*disk_super
;
2234 disk_super
= fs_info
->super_copy
;
2235 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
2238 static inline int btrfs_fs_compat_ro(struct btrfs_fs_info
*fs_info
, u64 flag
)
2240 struct btrfs_super_block
*disk_super
;
2241 disk_super
= fs_info
->super_copy
;
2242 return !!(btrfs_super_compat_ro_flags(disk_super
) & flag
);
2245 /* helper function to cast into the data area of the leaf. */
2246 #define btrfs_item_ptr(leaf, slot, type) \
2247 ((type *)(btrfs_leaf_data(leaf) + \
2248 btrfs_item_offset_nr(leaf, slot)))
2250 #define btrfs_item_ptr_offset(leaf, slot) \
2251 ((unsigned long)(btrfs_leaf_data(leaf) + \
2252 btrfs_item_offset_nr(leaf, slot)))
2255 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
2256 struct btrfs_root
*root
,
2257 u64 num_bytes
, u64 empty_size
,
2258 u64 hint_byte
, u64 search_end
,
2259 struct btrfs_key
*ins
, int data
);
2260 int btrfs_fix_block_accounting(struct btrfs_trans_handle
*trans
,
2261 struct btrfs_root
*root
);
2262 void btrfs_pin_extent(struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 num_bytes
);
2263 void btrfs_unpin_extent(struct btrfs_fs_info
*fs_info
,
2264 u64 bytenr
, u64 num_bytes
);
2265 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
2266 struct btrfs_root
*root
);
2267 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
2268 btrfs_fs_info
*info
,
2270 struct btrfs_block_group_cache
*btrfs_lookup_first_block_group(struct
2271 btrfs_fs_info
*info
,
2273 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
2274 struct btrfs_root
*root
,
2275 u32 blocksize
, u64 root_objectid
,
2276 struct btrfs_disk_key
*key
, int level
,
2277 u64 hint
, u64 empty_size
);
2278 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
2279 struct btrfs_root
*root
,
2280 u64 num_bytes
, u64 parent
,
2281 u64 root_objectid
, u64 ref_generation
,
2282 u64 owner
, u64 empty_size
, u64 hint_byte
,
2283 u64 search_end
, struct btrfs_key
*ins
, int data
);
2284 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2285 struct btrfs_root
*root
, u64 bytenr
,
2286 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2287 int btrfs_set_block_flags(struct btrfs_trans_handle
*trans
,
2288 struct btrfs_root
*root
,
2289 u64 bytenr
, int level
, u64 flags
);
2290 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2291 struct extent_buffer
*buf
, int record_parent
);
2292 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2293 struct extent_buffer
*buf
, int record_parent
);
2294 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2295 struct btrfs_root
*root
,
2296 u64 bytenr
, u64 num_bytes
, u64 parent
,
2297 u64 root_objectid
, u64 owner
, u64 offset
);
2298 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2299 struct btrfs_root
*root
,
2300 struct extent_io_tree
*unpin
);
2301 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2302 struct btrfs_root
*root
,
2303 u64 bytenr
, u64 num_bytes
, u64 parent
,
2304 u64 root_objectid
, u64 ref_generation
,
2305 u64 owner_objectid
);
2306 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
2307 struct btrfs_root
*root
, u64 bytenr
,
2308 u64 orig_parent
, u64 parent
,
2309 u64 root_objectid
, u64 ref_generation
,
2310 u64 owner_objectid
);
2311 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2312 struct btrfs_root
*root
);
2313 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2314 int btrfs_read_block_groups(struct btrfs_root
*root
);
2315 struct btrfs_block_group_cache
*
2316 btrfs_add_block_group(struct btrfs_fs_info
*fs_info
, u64 bytes_used
, u64 type
,
2317 u64 chunk_objectid
, u64 chunk_offset
, u64 size
);
2318 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2319 struct btrfs_root
*root
, u64 bytes_used
,
2320 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2322 int btrfs_make_block_groups(struct btrfs_trans_handle
*trans
,
2323 struct btrfs_root
*root
);
2324 int btrfs_update_block_group(struct btrfs_trans_handle
*trans
,
2325 struct btrfs_root
*root
, u64 bytenr
, u64 num
,
2326 int alloc
, int mark_free
);
2327 int btrfs_record_file_extent(struct btrfs_trans_handle
*trans
,
2328 struct btrfs_root
*root
, u64 objectid
,
2329 struct btrfs_inode_item
*inode
,
2330 u64 file_pos
, u64 disk_bytenr
,
2332 int btrfs_free_block_group(struct btrfs_trans_handle
*trans
,
2333 struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 len
);
2334 void free_excluded_extents(struct btrfs_root
*root
,
2335 struct btrfs_block_group_cache
*cache
);
2336 int exclude_super_stripes(struct btrfs_root
*root
,
2337 struct btrfs_block_group_cache
*cache
);
2338 u64
add_new_free_space(struct btrfs_block_group_cache
*block_group
,
2339 struct btrfs_fs_info
*info
, u64 start
, u64 end
);
2341 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2342 int btrfs_del_ptr(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2343 struct btrfs_path
*path
, int level
, int slot
);
2344 enum btrfs_tree_block_status
2345 btrfs_check_node(struct btrfs_root
*root
, struct btrfs_disk_key
*parent_key
,
2346 struct extent_buffer
*buf
);
2347 enum btrfs_tree_block_status
2348 btrfs_check_leaf(struct btrfs_root
*root
, struct btrfs_disk_key
*parent_key
,
2349 struct extent_buffer
*buf
);
2350 void reada_for_search(struct btrfs_root
*root
, struct btrfs_path
*path
,
2351 int level
, int slot
, u64 objectid
);
2352 struct extent_buffer
*read_node_slot(struct btrfs_root
*root
,
2353 struct extent_buffer
*parent
, int slot
);
2354 int btrfs_previous_item(struct btrfs_root
*root
,
2355 struct btrfs_path
*path
, u64 min_objectid
,
2357 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2358 struct btrfs_path
*path
, u64 min_objectid
);
2359 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2360 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2361 struct extent_buffer
*parent
, int parent_slot
,
2362 struct extent_buffer
**cow_ret
);
2363 int __btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2364 struct btrfs_root
*root
,
2365 struct extent_buffer
*buf
,
2366 struct extent_buffer
*parent
, int parent_slot
,
2367 struct extent_buffer
**cow_ret
,
2368 u64 search_start
, u64 empty_size
);
2369 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2370 struct btrfs_root
*root
,
2371 struct extent_buffer
*buf
,
2372 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2373 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2374 *root
, struct btrfs_path
*path
, u32 data_size
);
2375 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
2376 struct btrfs_root
*root
,
2377 struct btrfs_path
*path
,
2378 u32 new_size
, int from_end
);
2379 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2380 struct btrfs_root
*root
,
2381 struct btrfs_path
*path
,
2382 struct btrfs_key
*new_key
,
2383 unsigned long split_offset
);
2384 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2385 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2387 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*found_path
,
2388 u64 iobjectid
, u64 ioff
, u8 key_type
,
2389 struct btrfs_key
*found_key
);
2390 void btrfs_release_path(struct btrfs_path
*p
);
2391 void add_root_to_dirty_list(struct btrfs_root
*root
);
2392 struct btrfs_path
*btrfs_alloc_path(void);
2393 void btrfs_free_path(struct btrfs_path
*p
);
2394 void btrfs_init_path(struct btrfs_path
*p
);
2395 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2396 struct btrfs_path
*path
, int slot
, int nr
);
2398 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2399 struct btrfs_root
*root
,
2400 struct btrfs_path
*path
)
2402 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2405 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2406 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2407 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2408 struct btrfs_root
*root
,
2409 struct btrfs_path
*path
,
2410 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2412 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2413 struct btrfs_root
*root
,
2414 struct btrfs_path
*path
,
2415 struct btrfs_key
*key
,
2418 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2421 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2422 static inline int btrfs_next_item(struct btrfs_root
*root
,
2423 struct btrfs_path
*p
)
2426 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2427 return btrfs_next_leaf(root
, p
);
2431 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2432 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2433 void btrfs_fixup_low_keys(struct btrfs_root
*root
, struct btrfs_path
*path
,
2434 struct btrfs_disk_key
*key
, int level
);
2435 int btrfs_set_item_key_safe(struct btrfs_root
*root
, struct btrfs_path
*path
,
2436 struct btrfs_key
*new_key
);
2437 void btrfs_set_item_key_unsafe(struct btrfs_root
*root
,
2438 struct btrfs_path
*path
,
2439 struct btrfs_key
*new_key
);
2442 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2443 struct btrfs_root
*tree_root
,
2444 u64 root_id
, u8 type
, u64 ref_id
,
2445 u64 dirid
, u64 sequence
,
2446 const char *name
, int name_len
);
2447 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2448 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2450 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2451 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2453 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
2454 btrfs_root_item
*item
, struct btrfs_key
*key
);
2456 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2457 *root
, const char *name
, int name_len
, u64 dir
,
2458 struct btrfs_key
*location
, u8 type
, u64 index
);
2459 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2460 struct btrfs_root
*root
,
2461 struct btrfs_path
*path
, u64 dir
,
2462 const char *name
, int name_len
,
2464 struct btrfs_dir_item
*btrfs_lookup_dir_index(struct btrfs_trans_handle
*trans
,
2465 struct btrfs_root
*root
,
2466 struct btrfs_path
*path
, u64 dir
,
2467 const char *name
, int name_len
,
2468 u64 index
, int mod
);
2469 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2470 struct btrfs_root
*root
,
2471 struct btrfs_path
*path
,
2472 struct btrfs_dir_item
*di
);
2473 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2474 struct btrfs_root
*root
, const char *name
,
2475 u16 name_len
, const void *data
, u16 data_len
,
2478 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2479 struct btrfs_root
*fs_root
,
2480 u64 dirid
, u64
*objectid
);
2483 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2484 struct btrfs_root
*root
,
2485 const char *name
, int name_len
,
2486 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2487 int btrfs_insert_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2488 *root
, u64 objectid
, struct btrfs_inode_item
2490 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2491 *root
, struct btrfs_path
*path
,
2492 struct btrfs_key
*location
, int mod
);
2493 struct btrfs_inode_extref
*btrfs_lookup_inode_extref(struct btrfs_trans_handle
2494 *trans
, struct btrfs_path
*path
, struct btrfs_root
*root
,
2495 u64 ino
, u64 parent_ino
, u64 index
, const char *name
,
2496 int namelen
, int ins_len
);
2497 int btrfs_del_inode_extref(struct btrfs_trans_handle
*trans
,
2498 struct btrfs_root
*root
,
2499 const char *name
, int name_len
,
2500 u64 inode_objectid
, u64 ref_objectid
,
2502 int btrfs_insert_inode_extref(struct btrfs_trans_handle
*trans
,
2503 struct btrfs_root
*root
,
2504 const char *name
, int name_len
,
2505 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2506 struct btrfs_inode_ref
*btrfs_lookup_inode_ref(struct btrfs_trans_handle
*trans
,
2507 struct btrfs_root
*root
, struct btrfs_path
*path
,
2508 const char *name
, int namelen
, u64 ino
, u64 parent_ino
,
2509 u64 index
, int ins_len
);
2510 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2511 struct btrfs_root
*root
, const char *name
, int name_len
,
2512 u64 ino
, u64 parent_ino
, u64
*index
);
2515 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2516 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2517 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2518 struct btrfs_root
*root
,
2519 u64 objectid
, u64 pos
, u64 offset
,
2522 int btrfs_insert_inline_extent(struct btrfs_trans_handle
*trans
,
2523 struct btrfs_root
*root
, u64 objectid
,
2524 u64 offset
, char *buffer
, size_t size
);
2525 int btrfs_csum_file_block(struct btrfs_trans_handle
*trans
,
2526 struct btrfs_root
*root
, u64 alloc_end
,
2527 u64 bytenr
, char *data
, size_t len
);
2528 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2529 struct btrfs_root
*root
, struct btrfs_path
*path
,
2533 int btrfs_lookup_uuid_subvol_item(int fd
, const u8
*uuid
, u64
*subvol_id
);
2534 int btrfs_lookup_uuid_received_subvol_item(int fd
, const u8
*uuid
,
2537 static inline int is_fstree(u64 rootid
)
2539 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
2540 (signed long long)rootid
>= (signed long long)BTRFS_FIRST_FREE_OBJECTID
)
2546 int check_dir_conflict(struct btrfs_root
*root
, char *name
, int namelen
,
2547 u64 dir
, u64 index
);
2548 int btrfs_new_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2550 int btrfs_add_link(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2551 u64 ino
, u64 parent_ino
, char *name
, int namelen
,
2552 u8 type
, u64
*index
, int add_backref
);
2553 int btrfs_unlink(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2554 u64 ino
, u64 parent_ino
, u64 index
, const char *name
,
2555 int namelen
, int add_orphan
);
2556 int btrfs_add_orphan_item(struct btrfs_trans_handle
*trans
,
2557 struct btrfs_root
*root
, struct btrfs_path
*path
,
2559 int btrfs_mkdir(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2560 char *name
, int namelen
, u64 parent_ino
, u64
*ino
, int mode
);
2563 int btrfs_get_extent(struct btrfs_trans_handle
*trans
,
2564 struct btrfs_root
*root
,
2565 struct btrfs_path
*path
,
2566 u64 ino
, u64 offset
, u64 len
, int ins_len
);
2567 int btrfs_punch_hole(struct btrfs_trans_handle
*trans
,
2568 struct btrfs_root
*root
,
2569 u64 ino
, u64 offset
, u64 len
);