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__
20 #define __BTRFS_CTREE__
23 #include <linux/highmem.h>
25 #include <linux/rwsem.h>
26 #include <linux/semaphore.h>
27 #include <linux/completion.h>
28 #include <linux/backing-dev.h>
29 #include <linux/wait.h>
30 #include <linux/slab.h>
31 #include <linux/kobject.h>
32 #include <trace/events/btrfs.h>
33 #include <asm/kmap_types.h>
34 #include <linux/pagemap.h>
35 #include <linux/btrfs.h>
36 #include <linux/workqueue.h>
37 #include "extent_io.h"
38 #include "extent_map.h"
39 #include "async-thread.h"
41 struct btrfs_trans_handle
;
42 struct btrfs_transaction
;
43 struct btrfs_pending_snapshot
;
44 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
45 extern struct kmem_cache
*btrfs_transaction_cachep
;
46 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
47 extern struct kmem_cache
*btrfs_path_cachep
;
48 extern struct kmem_cache
*btrfs_free_space_cachep
;
49 struct btrfs_ordered_sum
;
51 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
52 #define STATIC noinline
54 #define STATIC static noinline
57 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
59 #define BTRFS_MAX_MIRRORS 3
61 #define BTRFS_MAX_LEVEL 8
63 #define BTRFS_COMPAT_EXTENT_TREE_V0
66 * files bigger than this get some pre-flushing when they are added
67 * to the ordered operations list. That way we limit the total
68 * work done by the commit
70 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
72 /* holds pointers to all of the tree roots */
73 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
75 /* stores information about which extents are in use, and reference counts */
76 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
79 * chunk tree stores translations from logical -> physical block numbering
80 * the super block points to the chunk tree
82 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
85 * stores information about which areas of a given device are in use.
86 * one per device. The tree of tree roots points to the device tree
88 #define BTRFS_DEV_TREE_OBJECTID 4ULL
90 /* one per subvolume, storing files and directories */
91 #define BTRFS_FS_TREE_OBJECTID 5ULL
93 /* directory objectid inside the root tree */
94 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
96 /* holds checksums of all the data extents */
97 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
99 /* holds quota configuration and tracking */
100 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
102 /* for storing items that use the BTRFS_UUID_KEY* types */
103 #define BTRFS_UUID_TREE_OBJECTID 9ULL
105 /* for storing balance parameters in the root tree */
106 #define BTRFS_BALANCE_OBJECTID -4ULL
108 /* orhpan objectid for tracking unlinked/truncated files */
109 #define BTRFS_ORPHAN_OBJECTID -5ULL
111 /* does write ahead logging to speed up fsyncs */
112 #define BTRFS_TREE_LOG_OBJECTID -6ULL
113 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
115 /* for space balancing */
116 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
117 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
120 * extent checksums all have this objectid
121 * this allows them to share the logging tree
124 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
126 /* For storing free space cache */
127 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
130 * The inode number assigned to the special inode for storing
133 #define BTRFS_FREE_INO_OBJECTID -12ULL
135 /* dummy objectid represents multiple objectids */
136 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
139 * All files have objectids in this range.
141 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
142 #define BTRFS_LAST_FREE_OBJECTID -256ULL
143 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
147 * the device items go into the chunk tree. The key is in the form
148 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
150 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
152 #define BTRFS_BTREE_INODE_OBJECTID 1
154 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
156 #define BTRFS_DEV_REPLACE_DEVID 0ULL
159 * the max metadata block size. This limit is somewhat artificial,
160 * but the memmove costs go through the roof for larger blocks.
162 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
165 * we can actually store much bigger names, but lets not confuse the rest
168 #define BTRFS_NAME_LEN 255
171 * Theoretical limit is larger, but we keep this down to a sane
172 * value. That should limit greatly the possibility of collisions on
175 #define BTRFS_LINK_MAX 65535U
177 /* 32 bytes in various csum fields */
178 #define BTRFS_CSUM_SIZE 32
181 #define BTRFS_CSUM_TYPE_CRC32 0
183 static int btrfs_csum_sizes
[] = { 4, 0 };
185 /* four bytes for CRC32 */
186 #define BTRFS_EMPTY_DIR_SIZE 0
188 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
189 #define REQ_GET_READ_MIRRORS (1 << 30)
191 #define BTRFS_FT_UNKNOWN 0
192 #define BTRFS_FT_REG_FILE 1
193 #define BTRFS_FT_DIR 2
194 #define BTRFS_FT_CHRDEV 3
195 #define BTRFS_FT_BLKDEV 4
196 #define BTRFS_FT_FIFO 5
197 #define BTRFS_FT_SOCK 6
198 #define BTRFS_FT_SYMLINK 7
199 #define BTRFS_FT_XATTR 8
200 #define BTRFS_FT_MAX 9
202 /* ioprio of readahead is set to idle */
203 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
205 #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
208 * The key defines the order in the tree, and so it also defines (optimal)
211 * objectid corresponds to the inode number.
213 * type tells us things about the object, and is a kind of stream selector.
214 * so for a given inode, keys with type of 1 might refer to the inode data,
215 * type of 2 may point to file data in the btree and type == 3 may point to
218 * offset is the starting byte offset for this key in the stream.
220 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
221 * in cpu native order. Otherwise they are identical and their sizes
222 * should be the same (ie both packed)
224 struct btrfs_disk_key
{
228 } __attribute__ ((__packed__
));
234 } __attribute__ ((__packed__
));
236 struct btrfs_mapping_tree
{
237 struct extent_map_tree map_tree
;
240 struct btrfs_dev_item
{
241 /* the internal btrfs device id */
244 /* size of the device */
250 /* optimal io alignment for this device */
253 /* optimal io width for this device */
256 /* minimal io size for this device */
259 /* type and info about this device */
262 /* expected generation for this device */
266 * starting byte of this partition on the device,
267 * to allow for stripe alignment in the future
271 /* grouping information for allocation decisions */
274 /* seek speed 0-100 where 100 is fastest */
277 /* bandwidth 0-100 where 100 is fastest */
280 /* btrfs generated uuid for this device */
281 u8 uuid
[BTRFS_UUID_SIZE
];
283 /* uuid of FS who owns this device */
284 u8 fsid
[BTRFS_UUID_SIZE
];
285 } __attribute__ ((__packed__
));
287 struct btrfs_stripe
{
290 u8 dev_uuid
[BTRFS_UUID_SIZE
];
291 } __attribute__ ((__packed__
));
294 /* size of this chunk in bytes */
297 /* objectid of the root referencing this chunk */
303 /* optimal io alignment for this chunk */
306 /* optimal io width for this chunk */
309 /* minimal io size for this chunk */
312 /* 2^16 stripes is quite a lot, a second limit is the size of a single
317 /* sub stripes only matter for raid10 */
319 struct btrfs_stripe stripe
;
320 /* additional stripes go here */
321 } __attribute__ ((__packed__
));
323 #define BTRFS_FREE_SPACE_EXTENT 1
324 #define BTRFS_FREE_SPACE_BITMAP 2
326 struct btrfs_free_space_entry
{
330 } __attribute__ ((__packed__
));
332 struct btrfs_free_space_header
{
333 struct btrfs_disk_key location
;
337 } __attribute__ ((__packed__
));
339 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
341 BUG_ON(num_stripes
== 0);
342 return sizeof(struct btrfs_chunk
) +
343 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
346 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
347 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
352 #define BTRFS_FS_STATE_ERROR 0
353 #define BTRFS_FS_STATE_REMOUNTING 1
354 #define BTRFS_FS_STATE_TRANS_ABORTED 2
355 #define BTRFS_FS_STATE_DEV_REPLACING 3
357 /* Super block flags */
358 /* Errors detected */
359 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
361 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
362 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
364 #define BTRFS_BACKREF_REV_MAX 256
365 #define BTRFS_BACKREF_REV_SHIFT 56
366 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
367 BTRFS_BACKREF_REV_SHIFT)
369 #define BTRFS_OLD_BACKREF_REV 0
370 #define BTRFS_MIXED_BACKREF_REV 1
373 * every tree block (leaf or node) starts with this header.
375 struct btrfs_header
{
376 /* these first four must match the super block */
377 u8 csum
[BTRFS_CSUM_SIZE
];
378 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
379 __le64 bytenr
; /* which block this node is supposed to live in */
382 /* allowed to be different from the super from here on down */
383 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
388 } __attribute__ ((__packed__
));
390 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
391 sizeof(struct btrfs_header)) / \
392 sizeof(struct btrfs_key_ptr))
393 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
394 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
395 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
396 sizeof(struct btrfs_item) - \
397 sizeof(struct btrfs_file_extent_item))
398 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
399 sizeof(struct btrfs_item) -\
400 sizeof(struct btrfs_dir_item))
404 * this is a very generous portion of the super block, giving us
405 * room to translate 14 chunks with 3 stripes each.
407 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
408 #define BTRFS_LABEL_SIZE 256
411 * just in case we somehow lose the roots and are not able to mount,
412 * we store an array of the roots from previous transactions
415 #define BTRFS_NUM_BACKUP_ROOTS 4
416 struct btrfs_root_backup
{
418 __le64 tree_root_gen
;
421 __le64 chunk_root_gen
;
424 __le64 extent_root_gen
;
433 __le64 csum_root_gen
;
443 u8 extent_root_level
;
447 /* future and to align */
449 } __attribute__ ((__packed__
));
452 * the super block basically lists the main trees of the FS
453 * it currently lacks any block count etc etc
455 struct btrfs_super_block
{
456 u8 csum
[BTRFS_CSUM_SIZE
];
457 /* the first 4 fields must match struct btrfs_header */
458 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
459 __le64 bytenr
; /* this block number */
462 /* allowed to be different from the btrfs_header from here own down */
469 /* this will help find the new super based on the log root */
470 __le64 log_root_transid
;
473 __le64 root_dir_objectid
;
479 __le32 sys_chunk_array_size
;
480 __le64 chunk_root_generation
;
482 __le64 compat_ro_flags
;
483 __le64 incompat_flags
;
488 struct btrfs_dev_item dev_item
;
490 char label
[BTRFS_LABEL_SIZE
];
492 __le64 cache_generation
;
493 __le64 uuid_tree_generation
;
495 /* future expansion */
497 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
498 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
499 } __attribute__ ((__packed__
));
502 * Compat flags that we support. If any incompat flags are set other than the
503 * ones specified below then we will fail to mount
505 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
506 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
507 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
508 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
510 * some patches floated around with a second compression method
511 * lets save that incompat here for when they do get in
512 * Note we don't actually support it, we're just reserving the
515 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
518 * older kernels tried to do bigger metadata blocks, but the
519 * code was pretty buggy. Lets not let them try anymore.
521 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
523 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
524 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
525 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
526 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
528 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
529 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
530 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
531 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
532 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
533 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
535 #define BTRFS_FEATURE_INCOMPAT_SUPP \
536 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
537 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
538 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
539 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
540 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
541 BTRFS_FEATURE_INCOMPAT_RAID56 | \
542 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
543 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
544 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
546 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
547 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
548 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
551 * A leaf is full of items. offset and size tell us where to find
552 * the item in the leaf (relative to the start of the data area)
555 struct btrfs_disk_key key
;
558 } __attribute__ ((__packed__
));
561 * leaves have an item area and a data area:
562 * [item0, item1....itemN] [free space] [dataN...data1, data0]
564 * The data is separate from the items to get the keys closer together
568 struct btrfs_header header
;
569 struct btrfs_item items
[];
570 } __attribute__ ((__packed__
));
573 * all non-leaf blocks are nodes, they hold only keys and pointers to
576 struct btrfs_key_ptr
{
577 struct btrfs_disk_key key
;
580 } __attribute__ ((__packed__
));
583 struct btrfs_header header
;
584 struct btrfs_key_ptr ptrs
[];
585 } __attribute__ ((__packed__
));
588 * btrfs_paths remember the path taken from the root down to the leaf.
589 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
590 * to any other levels that are present.
592 * The slots array records the index of the item or block pointer
593 * used while walking the tree.
596 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
597 int slots
[BTRFS_MAX_LEVEL
];
598 /* if there is real range locking, this locks field will change */
599 int locks
[BTRFS_MAX_LEVEL
];
601 /* keep some upper locks as we walk down */
605 * set by btrfs_split_item, tells search_slot to keep all locks
606 * and to force calls to keep space in the nodes
608 unsigned int search_for_split
:1;
609 unsigned int keep_locks
:1;
610 unsigned int skip_locking
:1;
611 unsigned int leave_spinning
:1;
612 unsigned int search_commit_root
:1;
613 unsigned int need_commit_sem
:1;
617 * items in the extent btree are used to record the objectid of the
618 * owner of the block and the number of references
621 struct btrfs_extent_item
{
625 } __attribute__ ((__packed__
));
627 struct btrfs_extent_item_v0
{
629 } __attribute__ ((__packed__
));
631 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
632 sizeof(struct btrfs_item))
634 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
635 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
637 /* following flags only apply to tree blocks */
639 /* use full backrefs for extent pointers in the block */
640 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
643 * this flag is only used internally by scrub and may be changed at any time
644 * it is only declared here to avoid collisions
646 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
648 struct btrfs_tree_block_info
{
649 struct btrfs_disk_key key
;
651 } __attribute__ ((__packed__
));
653 struct btrfs_extent_data_ref
{
658 } __attribute__ ((__packed__
));
660 struct btrfs_shared_data_ref
{
662 } __attribute__ ((__packed__
));
664 struct btrfs_extent_inline_ref
{
667 } __attribute__ ((__packed__
));
669 /* old style backrefs item */
670 struct btrfs_extent_ref_v0
{
675 } __attribute__ ((__packed__
));
678 /* dev extents record free space on individual devices. The owner
679 * field points back to the chunk allocation mapping tree that allocated
680 * the extent. The chunk tree uuid field is a way to double check the owner
682 struct btrfs_dev_extent
{
684 __le64 chunk_objectid
;
687 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
688 } __attribute__ ((__packed__
));
690 struct btrfs_inode_ref
{
694 } __attribute__ ((__packed__
));
696 struct btrfs_inode_extref
{
697 __le64 parent_objectid
;
702 } __attribute__ ((__packed__
));
704 struct btrfs_timespec
{
707 } __attribute__ ((__packed__
));
709 enum btrfs_compression_type
{
710 BTRFS_COMPRESS_NONE
= 0,
711 BTRFS_COMPRESS_ZLIB
= 1,
712 BTRFS_COMPRESS_LZO
= 2,
713 BTRFS_COMPRESS_TYPES
= 2,
714 BTRFS_COMPRESS_LAST
= 3,
717 struct btrfs_inode_item
{
718 /* nfs style generation number */
720 /* transid that last touched this inode */
732 /* modification sequence number for NFS */
736 * a little future expansion, for more than this we can
737 * just grow the inode item and version it
740 struct btrfs_timespec atime
;
741 struct btrfs_timespec ctime
;
742 struct btrfs_timespec mtime
;
743 struct btrfs_timespec otime
;
744 } __attribute__ ((__packed__
));
746 struct btrfs_dir_log_item
{
748 } __attribute__ ((__packed__
));
750 struct btrfs_dir_item
{
751 struct btrfs_disk_key location
;
756 } __attribute__ ((__packed__
));
758 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
761 * Internal in-memory flag that a subvolume has been marked for deletion but
762 * still visible as a directory
764 #define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48)
766 struct btrfs_root_item
{
767 struct btrfs_inode_item inode
;
773 __le64 last_snapshot
;
776 struct btrfs_disk_key drop_progress
;
781 * The following fields appear after subvol_uuids+subvol_times
786 * This generation number is used to test if the new fields are valid
787 * and up to date while reading the root item. Everytime the root item
788 * is written out, the "generation" field is copied into this field. If
789 * anyone ever mounted the fs with an older kernel, we will have
790 * mismatching generation values here and thus must invalidate the
791 * new fields. See btrfs_update_root and btrfs_find_last_root for
793 * the offset of generation_v2 is also used as the start for the memset
794 * when invalidating the fields.
796 __le64 generation_v2
;
797 u8 uuid
[BTRFS_UUID_SIZE
];
798 u8 parent_uuid
[BTRFS_UUID_SIZE
];
799 u8 received_uuid
[BTRFS_UUID_SIZE
];
800 __le64 ctransid
; /* updated when an inode changes */
801 __le64 otransid
; /* trans when created */
802 __le64 stransid
; /* trans when sent. non-zero for received subvol */
803 __le64 rtransid
; /* trans when received. non-zero for received subvol */
804 struct btrfs_timespec ctime
;
805 struct btrfs_timespec otime
;
806 struct btrfs_timespec stime
;
807 struct btrfs_timespec rtime
;
808 __le64 reserved
[8]; /* for future */
809 } __attribute__ ((__packed__
));
812 * this is used for both forward and backward root refs
814 struct btrfs_root_ref
{
818 } __attribute__ ((__packed__
));
820 struct btrfs_disk_balance_args
{
822 * profiles to operate on, single is denoted by
823 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
833 /* devid subset filter [pstart..pend) */
837 /* btrfs virtual address space subset filter [vstart..vend) */
842 * profile to convert to, single is denoted by
843 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
847 /* BTRFS_BALANCE_ARGS_* */
850 /* BTRFS_BALANCE_ARGS_LIMIT value */
854 } __attribute__ ((__packed__
));
857 * store balance parameters to disk so that balance can be properly
858 * resumed after crash or unmount
860 struct btrfs_balance_item
{
861 /* BTRFS_BALANCE_* */
864 struct btrfs_disk_balance_args data
;
865 struct btrfs_disk_balance_args meta
;
866 struct btrfs_disk_balance_args sys
;
869 } __attribute__ ((__packed__
));
871 #define BTRFS_FILE_EXTENT_INLINE 0
872 #define BTRFS_FILE_EXTENT_REG 1
873 #define BTRFS_FILE_EXTENT_PREALLOC 2
875 struct btrfs_file_extent_item
{
877 * transaction id that created this extent
881 * max number of bytes to hold this extent in ram
882 * when we split a compressed extent we can't know how big
883 * each of the resulting pieces will be. So, this is
884 * an upper limit on the size of the extent in ram instead of
890 * 32 bits for the various ways we might encode the data,
891 * including compression and encryption. If any of these
892 * are set to something a given disk format doesn't understand
893 * it is treated like an incompat flag for reading and writing,
898 __le16 other_encoding
; /* spare for later use */
900 /* are we inline data or a real extent? */
904 * disk space consumed by the extent, checksum blocks are included
908 __le64 disk_num_bytes
;
910 * the logical offset in file blocks (no csums)
911 * this extent record is for. This allows a file extent to point
912 * into the middle of an existing extent on disk, sharing it
913 * between two snapshots (useful if some bytes in the middle of the
914 * extent have changed
918 * the logical number of file blocks (no csums included). This
919 * always reflects the size uncompressed and without encoding.
923 } __attribute__ ((__packed__
));
925 struct btrfs_csum_item
{
927 } __attribute__ ((__packed__
));
929 struct btrfs_dev_stats_item
{
931 * grow this item struct at the end for future enhancements and keep
932 * the existing values unchanged
934 __le64 values
[BTRFS_DEV_STAT_VALUES_MAX
];
935 } __attribute__ ((__packed__
));
937 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
938 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
939 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
940 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
941 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
942 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
943 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
945 struct btrfs_dev_replace
{
946 u64 replace_state
; /* see #define above */
947 u64 time_started
; /* seconds since 1-Jan-1970 */
948 u64 time_stopped
; /* seconds since 1-Jan-1970 */
949 atomic64_t num_write_errors
;
950 atomic64_t num_uncorrectable_read_errors
;
953 u64 committed_cursor_left
;
954 u64 cursor_left_last_write_of_item
;
957 u64 cont_reading_from_srcdev_mode
; /* see #define above */
960 int item_needs_writeback
;
961 struct btrfs_device
*srcdev
;
962 struct btrfs_device
*tgtdev
;
965 atomic_t nesting_level
;
966 struct mutex lock_finishing_cancel_unmount
;
967 struct mutex lock_management_lock
;
970 struct btrfs_scrub_progress scrub_progress
;
973 struct btrfs_dev_replace_item
{
975 * grow this item struct at the end for future enhancements and keep
976 * the existing values unchanged
981 __le64 cont_reading_from_srcdev_mode
;
983 __le64 replace_state
;
986 __le64 num_write_errors
;
987 __le64 num_uncorrectable_read_errors
;
988 } __attribute__ ((__packed__
));
990 /* different types of block groups (and chunks) */
991 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
992 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
993 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
994 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
995 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
996 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
997 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
998 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
999 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
1000 #define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
1001 BTRFS_SPACE_INFO_GLOBAL_RSV)
1003 enum btrfs_raid_types
{
1014 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1015 BTRFS_BLOCK_GROUP_SYSTEM | \
1016 BTRFS_BLOCK_GROUP_METADATA)
1018 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1019 BTRFS_BLOCK_GROUP_RAID1 | \
1020 BTRFS_BLOCK_GROUP_RAID5 | \
1021 BTRFS_BLOCK_GROUP_RAID6 | \
1022 BTRFS_BLOCK_GROUP_DUP | \
1023 BTRFS_BLOCK_GROUP_RAID10)
1025 * We need a bit for restriper to be able to tell when chunks of type
1026 * SINGLE are available. This "extended" profile format is used in
1027 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1028 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1029 * to avoid remappings between two formats in future.
1031 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1034 * A fake block group type that is used to communicate global block reserve
1035 * size to userspace via the SPACE_INFO ioctl.
1037 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
1039 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1040 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1042 static inline u64
chunk_to_extended(u64 flags
)
1044 if ((flags
& BTRFS_BLOCK_GROUP_PROFILE_MASK
) == 0)
1045 flags
|= BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1049 static inline u64
extended_to_chunk(u64 flags
)
1051 return flags
& ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1054 struct btrfs_block_group_item
{
1056 __le64 chunk_objectid
;
1058 } __attribute__ ((__packed__
));
1061 * is subvolume quota turned on?
1063 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1065 * RESCAN is set during the initialization phase
1067 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1069 * Some qgroup entries are known to be out of date,
1070 * either because the configuration has changed in a way that
1071 * makes a rescan necessary, or because the fs has been mounted
1072 * with a non-qgroup-aware version.
1073 * Turning qouta off and on again makes it inconsistent, too.
1075 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1077 #define BTRFS_QGROUP_STATUS_VERSION 1
1079 struct btrfs_qgroup_status_item
{
1082 * the generation is updated during every commit. As older
1083 * versions of btrfs are not aware of qgroups, it will be
1084 * possible to detect inconsistencies by checking the
1085 * generation on mount time
1089 /* flag definitions see above */
1093 * only used during scanning to record the progress
1094 * of the scan. It contains a logical address
1097 } __attribute__ ((__packed__
));
1099 struct btrfs_qgroup_info_item
{
1105 } __attribute__ ((__packed__
));
1107 /* flags definition for qgroup limits */
1108 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1109 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1110 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1111 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1112 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1113 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1115 struct btrfs_qgroup_limit_item
{
1117 * only updated when any of the other values change
1124 } __attribute__ ((__packed__
));
1126 /* For raid type sysfs entries */
1127 struct raid_kobject
{
1129 struct kobject kobj
;
1132 struct btrfs_space_info
{
1135 u64 total_bytes
; /* total bytes in the space,
1136 this doesn't take mirrors into account */
1137 u64 bytes_used
; /* total bytes used,
1138 this doesn't take mirrors into account */
1139 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
1140 transaction finishes */
1141 u64 bytes_reserved
; /* total bytes the allocator has reserved for
1142 current allocations */
1143 u64 bytes_may_use
; /* number of bytes that may be used for
1144 delalloc/allocations */
1145 u64 bytes_readonly
; /* total bytes that are read only */
1147 unsigned int full
:1; /* indicates that we cannot allocate any more
1148 chunks for this space */
1149 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
1151 unsigned int flush
:1; /* set if we are trying to make space */
1153 unsigned int force_alloc
; /* set if we need to force a chunk
1154 alloc for this space */
1156 u64 disk_used
; /* total bytes used on disk */
1157 u64 disk_total
; /* total bytes on disk, takes mirrors into
1163 * bytes_pinned is kept in line with what is actually pinned, as in
1164 * we've called update_block_group and dropped the bytes_used counter
1165 * and increased the bytes_pinned counter. However this means that
1166 * bytes_pinned does not reflect the bytes that will be pinned once the
1167 * delayed refs are flushed, so this counter is inc'ed everytime we call
1168 * btrfs_free_extent so it is a realtime count of what will be freed
1169 * once the transaction is committed. It will be zero'ed everytime the
1170 * transaction commits.
1172 struct percpu_counter total_bytes_pinned
;
1174 struct list_head list
;
1176 struct rw_semaphore groups_sem
;
1177 /* for block groups in our same type */
1178 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
1179 wait_queue_head_t wait
;
1181 struct kobject kobj
;
1182 struct kobject
*block_group_kobjs
[BTRFS_NR_RAID_TYPES
];
1185 #define BTRFS_BLOCK_RSV_GLOBAL 1
1186 #define BTRFS_BLOCK_RSV_DELALLOC 2
1187 #define BTRFS_BLOCK_RSV_TRANS 3
1188 #define BTRFS_BLOCK_RSV_CHUNK 4
1189 #define BTRFS_BLOCK_RSV_DELOPS 5
1190 #define BTRFS_BLOCK_RSV_EMPTY 6
1191 #define BTRFS_BLOCK_RSV_TEMP 7
1193 struct btrfs_block_rsv
{
1196 struct btrfs_space_info
*space_info
;
1198 unsigned short full
;
1199 unsigned short type
;
1200 unsigned short failfast
;
1204 * free clusters are used to claim free space in relatively large chunks,
1205 * allowing us to do less seeky writes. They are used for all metadata
1206 * allocations and data allocations in ssd mode.
1208 struct btrfs_free_cluster
{
1210 spinlock_t refill_lock
;
1211 struct rb_root root
;
1213 /* largest extent in this cluster */
1216 /* first extent starting offset */
1219 struct btrfs_block_group_cache
*block_group
;
1221 * when a cluster is allocated from a block group, we put the
1222 * cluster onto a list in the block group so that it can
1223 * be freed before the block group is freed.
1225 struct list_head block_group_list
;
1228 enum btrfs_caching_type
{
1230 BTRFS_CACHE_STARTED
= 1,
1231 BTRFS_CACHE_FAST
= 2,
1232 BTRFS_CACHE_FINISHED
= 3,
1233 BTRFS_CACHE_ERROR
= 4,
1236 enum btrfs_disk_cache_state
{
1237 BTRFS_DC_WRITTEN
= 0,
1241 BTRFS_DC_NEED_WRITE
= 4,
1244 struct btrfs_caching_control
{
1245 struct list_head list
;
1247 wait_queue_head_t wait
;
1248 struct btrfs_work work
;
1249 struct btrfs_block_group_cache
*block_group
;
1254 struct btrfs_block_group_cache
{
1255 struct btrfs_key key
;
1256 struct btrfs_block_group_item item
;
1257 struct btrfs_fs_info
*fs_info
;
1258 struct inode
*inode
;
1266 u64 cache_generation
;
1269 * It is just used for the delayed data space allocation because
1270 * only the data space allocation and the relative metadata update
1271 * can be done cross the transaction.
1273 struct rw_semaphore data_rwsem
;
1275 /* for raid56, this is a full stripe, without parity */
1276 unsigned long full_stripe_len
;
1279 unsigned int dirty
:1;
1280 unsigned int iref
:1;
1282 int disk_cache_state
;
1284 /* cache tracking stuff */
1286 struct btrfs_caching_control
*caching_ctl
;
1287 u64 last_byte_to_unpin
;
1289 struct btrfs_space_info
*space_info
;
1291 /* free space cache stuff */
1292 struct btrfs_free_space_ctl
*free_space_ctl
;
1294 /* block group cache stuff */
1295 struct rb_node cache_node
;
1297 /* for block groups in the same raid type */
1298 struct list_head list
;
1303 /* List of struct btrfs_free_clusters for this block group.
1304 * Today it will only have one thing on it, but that may change
1306 struct list_head cluster_list
;
1308 /* For delayed block group creation */
1309 struct list_head new_bg_list
;
1312 /* delayed seq elem */
1314 struct list_head list
;
1318 enum btrfs_orphan_cleanup_state
{
1319 ORPHAN_CLEANUP_STARTED
= 1,
1320 ORPHAN_CLEANUP_DONE
= 2,
1323 /* used by the raid56 code to lock stripes for read/modify/write */
1324 struct btrfs_stripe_hash
{
1325 struct list_head hash_list
;
1326 wait_queue_head_t wait
;
1330 /* used by the raid56 code to lock stripes for read/modify/write */
1331 struct btrfs_stripe_hash_table
{
1332 struct list_head stripe_cache
;
1333 spinlock_t cache_lock
;
1335 struct btrfs_stripe_hash table
[];
1338 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1340 void btrfs_init_async_reclaim_work(struct work_struct
*work
);
1343 struct reloc_control
;
1344 struct btrfs_device
;
1345 struct btrfs_fs_devices
;
1346 struct btrfs_balance_control
;
1347 struct btrfs_delayed_root
;
1348 struct btrfs_fs_info
{
1349 u8 fsid
[BTRFS_FSID_SIZE
];
1350 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1351 struct btrfs_root
*extent_root
;
1352 struct btrfs_root
*tree_root
;
1353 struct btrfs_root
*chunk_root
;
1354 struct btrfs_root
*dev_root
;
1355 struct btrfs_root
*fs_root
;
1356 struct btrfs_root
*csum_root
;
1357 struct btrfs_root
*quota_root
;
1358 struct btrfs_root
*uuid_root
;
1360 /* the log root tree is a directory of all the other log roots */
1361 struct btrfs_root
*log_root_tree
;
1363 spinlock_t fs_roots_radix_lock
;
1364 struct radix_tree_root fs_roots_radix
;
1366 /* block group cache stuff */
1367 spinlock_t block_group_cache_lock
;
1368 u64 first_logical_byte
;
1369 struct rb_root block_group_cache_tree
;
1371 /* keep track of unallocated space */
1372 spinlock_t free_chunk_lock
;
1373 u64 free_chunk_space
;
1375 struct extent_io_tree freed_extents
[2];
1376 struct extent_io_tree
*pinned_extents
;
1378 /* logical->physical extent mapping */
1379 struct btrfs_mapping_tree mapping_tree
;
1382 * block reservation for extent, checksum, root tree and
1383 * delayed dir index item
1385 struct btrfs_block_rsv global_block_rsv
;
1386 /* block reservation for delay allocation */
1387 struct btrfs_block_rsv delalloc_block_rsv
;
1388 /* block reservation for metadata operations */
1389 struct btrfs_block_rsv trans_block_rsv
;
1390 /* block reservation for chunk tree */
1391 struct btrfs_block_rsv chunk_block_rsv
;
1392 /* block reservation for delayed operations */
1393 struct btrfs_block_rsv delayed_block_rsv
;
1395 struct btrfs_block_rsv empty_block_rsv
;
1398 u64 last_trans_committed
;
1399 u64 avg_delayed_ref_runtime
;
1402 * this is updated to the current trans every time a full commit
1403 * is required instead of the faster short fsync log commits
1405 u64 last_trans_log_full_commit
;
1406 unsigned long mount_opt
;
1407 unsigned long compress_type
:4;
1408 int commit_interval
;
1410 * It is a suggestive number, the read side is safe even it gets a
1411 * wrong number because we will write out the data into a regular
1412 * extent. The write side(mount/remount) is under ->s_umount lock,
1413 * so it is also safe.
1417 * Protected by ->chunk_mutex and sb->s_umount.
1419 * The reason that we use two lock to protect it is because only
1420 * remount and mount operations can change it and these two operations
1421 * are under sb->s_umount, but the read side (chunk allocation) can not
1422 * acquire sb->s_umount or the deadlock would happen. So we use two
1423 * locks to protect it. On the write side, we must acquire two locks,
1424 * and on the read side, we just need acquire one of them.
1427 struct btrfs_transaction
*running_transaction
;
1428 wait_queue_head_t transaction_throttle
;
1429 wait_queue_head_t transaction_wait
;
1430 wait_queue_head_t transaction_blocked_wait
;
1431 wait_queue_head_t async_submit_wait
;
1434 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1435 * when they are updated.
1437 * Because we do not clear the flags for ever, so we needn't use
1438 * the lock on the read side.
1440 * We also needn't use the lock when we mount the fs, because
1441 * there is no other task which will update the flag.
1443 spinlock_t super_lock
;
1444 struct btrfs_super_block
*super_copy
;
1445 struct btrfs_super_block
*super_for_commit
;
1446 struct block_device
*__bdev
;
1447 struct super_block
*sb
;
1448 struct inode
*btree_inode
;
1449 struct backing_dev_info bdi
;
1450 struct mutex tree_log_mutex
;
1451 struct mutex transaction_kthread_mutex
;
1452 struct mutex cleaner_mutex
;
1453 struct mutex chunk_mutex
;
1454 struct mutex volume_mutex
;
1456 /* this is used during read/modify/write to make sure
1457 * no two ios are trying to mod the same stripe at the same
1460 struct btrfs_stripe_hash_table
*stripe_hash_table
;
1463 * this protects the ordered operations list only while we are
1464 * processing all of the entries on it. This way we make
1465 * sure the commit code doesn't find the list temporarily empty
1466 * because another function happens to be doing non-waiting preflush
1467 * before jumping into the main commit.
1469 struct mutex ordered_operations_mutex
;
1472 * Same as ordered_operations_mutex except this is for ordered extents
1473 * and not the operations.
1475 struct mutex ordered_extent_flush_mutex
;
1477 struct rw_semaphore commit_root_sem
;
1479 struct rw_semaphore cleanup_work_sem
;
1481 struct rw_semaphore subvol_sem
;
1482 struct srcu_struct subvol_srcu
;
1484 spinlock_t trans_lock
;
1486 * the reloc mutex goes with the trans lock, it is taken
1487 * during commit to protect us from the relocation code
1489 struct mutex reloc_mutex
;
1491 struct list_head trans_list
;
1492 struct list_head dead_roots
;
1493 struct list_head caching_block_groups
;
1495 spinlock_t delayed_iput_lock
;
1496 struct list_head delayed_iputs
;
1498 /* this protects tree_mod_seq_list */
1499 spinlock_t tree_mod_seq_lock
;
1500 atomic64_t tree_mod_seq
;
1501 struct list_head tree_mod_seq_list
;
1503 /* this protects tree_mod_log */
1504 rwlock_t tree_mod_log_lock
;
1505 struct rb_root tree_mod_log
;
1507 atomic_t nr_async_submits
;
1508 atomic_t async_submit_draining
;
1509 atomic_t nr_async_bios
;
1510 atomic_t async_delalloc_pages
;
1511 atomic_t open_ioctl_trans
;
1514 * this is used to protect the following list -- ordered_roots.
1516 spinlock_t ordered_root_lock
;
1519 * all fs/file tree roots in which there are data=ordered extents
1520 * pending writeback are added into this list.
1522 * these can span multiple transactions and basically include
1523 * every dirty data page that isn't from nodatacow
1525 struct list_head ordered_roots
;
1527 struct mutex delalloc_root_mutex
;
1528 spinlock_t delalloc_root_lock
;
1529 /* all fs/file tree roots that have delalloc inodes. */
1530 struct list_head delalloc_roots
;
1533 * there is a pool of worker threads for checksumming during writes
1534 * and a pool for checksumming after reads. This is because readers
1535 * can run with FS locks held, and the writers may be waiting for
1536 * those locks. We don't want ordering in the pending list to cause
1537 * deadlocks, and so the two are serviced separately.
1539 * A third pool does submit_bio to avoid deadlocking with the other
1542 struct btrfs_workqueue
*workers
;
1543 struct btrfs_workqueue
*delalloc_workers
;
1544 struct btrfs_workqueue
*flush_workers
;
1545 struct btrfs_workqueue
*endio_workers
;
1546 struct btrfs_workqueue
*endio_meta_workers
;
1547 struct btrfs_workqueue
*endio_raid56_workers
;
1548 struct btrfs_workqueue
*rmw_workers
;
1549 struct btrfs_workqueue
*endio_meta_write_workers
;
1550 struct btrfs_workqueue
*endio_write_workers
;
1551 struct btrfs_workqueue
*endio_freespace_worker
;
1552 struct btrfs_workqueue
*submit_workers
;
1553 struct btrfs_workqueue
*caching_workers
;
1554 struct btrfs_workqueue
*readahead_workers
;
1557 * fixup workers take dirty pages that didn't properly go through
1558 * the cow mechanism and make them safe to write. It happens
1559 * for the sys_munmap function call path
1561 struct btrfs_workqueue
*fixup_workers
;
1562 struct btrfs_workqueue
*delayed_workers
;
1564 /* the extent workers do delayed refs on the extent allocation tree */
1565 struct btrfs_workqueue
*extent_workers
;
1566 struct task_struct
*transaction_kthread
;
1567 struct task_struct
*cleaner_kthread
;
1568 int thread_pool_size
;
1570 struct kobject super_kobj
;
1571 struct kobject
*space_info_kobj
;
1572 struct kobject
*device_dir_kobj
;
1573 struct completion kobj_unregister
;
1576 int log_root_recovering
;
1580 /* used to keep from writing metadata until there is a nice batch */
1581 struct percpu_counter dirty_metadata_bytes
;
1582 struct percpu_counter delalloc_bytes
;
1583 s32 dirty_metadata_batch
;
1586 struct list_head dirty_cowonly_roots
;
1588 struct btrfs_fs_devices
*fs_devices
;
1591 * the space_info list is almost entirely read only. It only changes
1592 * when we add a new raid type to the FS, and that happens
1593 * very rarely. RCU is used to protect it.
1595 struct list_head space_info
;
1597 struct btrfs_space_info
*data_sinfo
;
1599 struct reloc_control
*reloc_ctl
;
1601 /* data_alloc_cluster is only used in ssd mode */
1602 struct btrfs_free_cluster data_alloc_cluster
;
1604 /* all metadata allocations go through this cluster */
1605 struct btrfs_free_cluster meta_alloc_cluster
;
1607 /* auto defrag inodes go here */
1608 spinlock_t defrag_inodes_lock
;
1609 struct rb_root defrag_inodes
;
1610 atomic_t defrag_running
;
1612 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1613 seqlock_t profiles_lock
;
1615 * these three are in extended format (availability of single
1616 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1617 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1619 u64 avail_data_alloc_bits
;
1620 u64 avail_metadata_alloc_bits
;
1621 u64 avail_system_alloc_bits
;
1623 /* restriper state */
1624 spinlock_t balance_lock
;
1625 struct mutex balance_mutex
;
1626 atomic_t balance_running
;
1627 atomic_t balance_pause_req
;
1628 atomic_t balance_cancel_req
;
1629 struct btrfs_balance_control
*balance_ctl
;
1630 wait_queue_head_t balance_wait_q
;
1632 unsigned data_chunk_allocations
;
1633 unsigned metadata_ratio
;
1637 /* private scrub information */
1638 struct mutex scrub_lock
;
1639 atomic_t scrubs_running
;
1640 atomic_t scrub_pause_req
;
1641 atomic_t scrubs_paused
;
1642 atomic_t scrub_cancel_req
;
1643 wait_queue_head_t scrub_pause_wait
;
1644 int scrub_workers_refcnt
;
1645 struct btrfs_workqueue
*scrub_workers
;
1646 struct btrfs_workqueue
*scrub_wr_completion_workers
;
1647 struct btrfs_workqueue
*scrub_nocow_workers
;
1649 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1650 u32 check_integrity_print_mask
;
1655 unsigned int quota_enabled
:1;
1658 * quota_enabled only changes state after a commit. This holds the
1661 unsigned int pending_quota_state
:1;
1663 /* is qgroup tracking in a consistent state? */
1666 /* holds configuration and tracking. Protected by qgroup_lock */
1667 struct rb_root qgroup_tree
;
1668 struct rb_root qgroup_op_tree
;
1669 spinlock_t qgroup_lock
;
1670 spinlock_t qgroup_op_lock
;
1671 atomic_t qgroup_op_seq
;
1674 * used to avoid frequently calling ulist_alloc()/ulist_free()
1675 * when doing qgroup accounting, it must be protected by qgroup_lock.
1677 struct ulist
*qgroup_ulist
;
1679 /* protect user change for quota operations */
1680 struct mutex qgroup_ioctl_lock
;
1682 /* list of dirty qgroups to be written at next commit */
1683 struct list_head dirty_qgroups
;
1685 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1688 /* qgroup rescan items */
1689 struct mutex qgroup_rescan_lock
; /* protects the progress item */
1690 struct btrfs_key qgroup_rescan_progress
;
1691 struct btrfs_workqueue
*qgroup_rescan_workers
;
1692 struct completion qgroup_rescan_completion
;
1693 struct btrfs_work qgroup_rescan_work
;
1695 /* filesystem state */
1696 unsigned long fs_state
;
1698 struct btrfs_delayed_root
*delayed_root
;
1700 /* readahead tree */
1701 spinlock_t reada_lock
;
1702 struct radix_tree_root reada_tree
;
1704 /* Extent buffer radix tree */
1705 spinlock_t buffer_lock
;
1706 struct radix_tree_root buffer_radix
;
1708 /* next backup root to be overwritten */
1709 int backup_root_index
;
1711 int num_tolerated_disk_barrier_failures
;
1713 /* device replace state */
1714 struct btrfs_dev_replace dev_replace
;
1716 atomic_t mutually_exclusive_operation_running
;
1718 struct percpu_counter bio_counter
;
1719 wait_queue_head_t replace_wait
;
1721 struct semaphore uuid_tree_rescan_sem
;
1722 unsigned int update_uuid_tree_gen
:1;
1724 /* Used to reclaim the metadata space in the background. */
1725 struct work_struct async_reclaim_work
;
1728 struct btrfs_subvolume_writers
{
1729 struct percpu_counter counter
;
1730 wait_queue_head_t wait
;
1734 * The state of btrfs root
1737 * btrfs_record_root_in_trans is a multi-step process,
1738 * and it can race with the balancing code. But the
1739 * race is very small, and only the first time the root
1740 * is added to each transaction. So IN_TRANS_SETUP
1741 * is used to tell us when more checks are required
1743 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1744 #define BTRFS_ROOT_REF_COWS 1
1745 #define BTRFS_ROOT_TRACK_DIRTY 2
1746 #define BTRFS_ROOT_IN_RADIX 3
1747 #define BTRFS_ROOT_DUMMY_ROOT 4
1748 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1749 #define BTRFS_ROOT_DEFRAG_RUNNING 6
1750 #define BTRFS_ROOT_FORCE_COW 7
1751 #define BTRFS_ROOT_MULTI_LOG_TASKS 8
1754 * in ram representation of the tree. extent_root is used for all allocations
1755 * and for the extent tree extent_root root.
1758 struct extent_buffer
*node
;
1760 struct extent_buffer
*commit_root
;
1761 struct btrfs_root
*log_root
;
1762 struct btrfs_root
*reloc_root
;
1764 unsigned long state
;
1765 struct btrfs_root_item root_item
;
1766 struct btrfs_key root_key
;
1767 struct btrfs_fs_info
*fs_info
;
1768 struct extent_io_tree dirty_log_pages
;
1770 struct kobject root_kobj
;
1771 struct completion kobj_unregister
;
1772 struct mutex objectid_mutex
;
1774 spinlock_t accounting_lock
;
1775 struct btrfs_block_rsv
*block_rsv
;
1777 /* free ino cache stuff */
1778 struct btrfs_free_space_ctl
*free_ino_ctl
;
1779 enum btrfs_caching_type cached
;
1780 spinlock_t cache_lock
;
1781 wait_queue_head_t cache_wait
;
1782 struct btrfs_free_space_ctl
*free_ino_pinned
;
1784 struct inode
*cache_inode
;
1786 struct mutex log_mutex
;
1787 wait_queue_head_t log_writer_wait
;
1788 wait_queue_head_t log_commit_wait
[2];
1789 struct list_head log_ctxs
[2];
1790 atomic_t log_writers
;
1791 atomic_t log_commit
[2];
1794 /* No matter the commit succeeds or not*/
1795 int log_transid_committed
;
1796 /* Just be updated when the commit succeeds. */
1797 int last_log_commit
;
1798 pid_t log_start_pid
;
1803 /* data allocations are done in sectorsize units */
1806 /* node allocations are done in nodesize units */
1809 /* leaf allocations are done in leafsize units */
1816 u64 highest_objectid
;
1818 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1822 u64 defrag_trans_start
;
1823 struct btrfs_key defrag_progress
;
1824 struct btrfs_key defrag_max
;
1827 /* the dirty list is only used by non-reference counted roots */
1828 struct list_head dirty_list
;
1830 struct list_head root_list
;
1832 spinlock_t log_extents_lock
[2];
1833 struct list_head logged_list
[2];
1835 spinlock_t orphan_lock
;
1836 atomic_t orphan_inodes
;
1837 struct btrfs_block_rsv
*orphan_block_rsv
;
1838 int orphan_cleanup_state
;
1840 spinlock_t inode_lock
;
1841 /* red-black tree that keeps track of in-memory inodes */
1842 struct rb_root inode_tree
;
1845 * radix tree that keeps track of delayed nodes of every inode,
1846 * protected by inode_lock
1848 struct radix_tree_root delayed_nodes_tree
;
1850 * right now this just gets used so that a root has its own devid
1851 * for stat. It may be used for more later
1855 spinlock_t root_item_lock
;
1858 struct mutex delalloc_mutex
;
1859 spinlock_t delalloc_lock
;
1861 * all of the inodes that have delalloc bytes. It is possible for
1862 * this list to be empty even when there is still dirty data=ordered
1863 * extents waiting to finish IO.
1865 struct list_head delalloc_inodes
;
1866 struct list_head delalloc_root
;
1867 u64 nr_delalloc_inodes
;
1869 struct mutex ordered_extent_mutex
;
1871 * this is used by the balancing code to wait for all the pending
1874 spinlock_t ordered_extent_lock
;
1877 * all of the data=ordered extents pending writeback
1878 * these can span multiple transactions and basically include
1879 * every dirty data page that isn't from nodatacow
1881 struct list_head ordered_extents
;
1882 struct list_head ordered_root
;
1883 u64 nr_ordered_extents
;
1886 * Number of currently running SEND ioctls to prevent
1887 * manipulation with the read-only status via SUBVOL_SETFLAGS
1889 int send_in_progress
;
1890 struct btrfs_subvolume_writers
*subv_writers
;
1891 atomic_t will_be_snapshoted
;
1894 struct btrfs_ioctl_defrag_range_args
{
1895 /* start of the defrag operation */
1898 /* number of bytes to defrag, use (u64)-1 to say all */
1902 * flags for the operation, which can include turning
1903 * on compression for this one defrag
1908 * any extent bigger than this will be considered
1909 * already defragged. Use 0 to take the kernel default
1910 * Use 1 to say every single extent must be rewritten
1912 __u32 extent_thresh
;
1915 * which compression method to use if turning on compression
1916 * for this defrag operation. If unspecified, zlib will
1919 __u32 compress_type
;
1921 /* spare for later */
1927 * inode items have the data typically returned from stat and store other
1928 * info about object characteristics. There is one for every file and dir in
1931 #define BTRFS_INODE_ITEM_KEY 1
1932 #define BTRFS_INODE_REF_KEY 12
1933 #define BTRFS_INODE_EXTREF_KEY 13
1934 #define BTRFS_XATTR_ITEM_KEY 24
1935 #define BTRFS_ORPHAN_ITEM_KEY 48
1936 /* reserve 2-15 close to the inode for later flexibility */
1939 * dir items are the name -> inode pointers in a directory. There is one
1940 * for every name in a directory.
1942 #define BTRFS_DIR_LOG_ITEM_KEY 60
1943 #define BTRFS_DIR_LOG_INDEX_KEY 72
1944 #define BTRFS_DIR_ITEM_KEY 84
1945 #define BTRFS_DIR_INDEX_KEY 96
1947 * extent data is for file data
1949 #define BTRFS_EXTENT_DATA_KEY 108
1952 * extent csums are stored in a separate tree and hold csums for
1953 * an entire extent on disk.
1955 #define BTRFS_EXTENT_CSUM_KEY 128
1958 * root items point to tree roots. They are typically in the root
1959 * tree used by the super block to find all the other trees
1961 #define BTRFS_ROOT_ITEM_KEY 132
1964 * root backrefs tie subvols and snapshots to the directory entries that
1967 #define BTRFS_ROOT_BACKREF_KEY 144
1970 * root refs make a fast index for listing all of the snapshots and
1971 * subvolumes referenced by a given root. They point directly to the
1972 * directory item in the root that references the subvol
1974 #define BTRFS_ROOT_REF_KEY 156
1977 * extent items are in the extent map tree. These record which blocks
1978 * are used, and how many references there are to each block
1980 #define BTRFS_EXTENT_ITEM_KEY 168
1983 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1984 * the length, so we save the level in key->offset instead of the length.
1986 #define BTRFS_METADATA_ITEM_KEY 169
1988 #define BTRFS_TREE_BLOCK_REF_KEY 176
1990 #define BTRFS_EXTENT_DATA_REF_KEY 178
1992 #define BTRFS_EXTENT_REF_V0_KEY 180
1994 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1996 #define BTRFS_SHARED_DATA_REF_KEY 184
1999 * block groups give us hints into the extent allocation trees. Which
2000 * blocks are free etc etc
2002 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
2004 #define BTRFS_DEV_EXTENT_KEY 204
2005 #define BTRFS_DEV_ITEM_KEY 216
2006 #define BTRFS_CHUNK_ITEM_KEY 228
2009 * Records the overall state of the qgroups.
2010 * There's only one instance of this key present,
2011 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
2013 #define BTRFS_QGROUP_STATUS_KEY 240
2015 * Records the currently used space of the qgroup.
2016 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
2018 #define BTRFS_QGROUP_INFO_KEY 242
2020 * Contains the user configured limits for the qgroup.
2021 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
2023 #define BTRFS_QGROUP_LIMIT_KEY 244
2025 * Records the child-parent relationship of qgroups. For
2026 * each relation, 2 keys are present:
2027 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
2028 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
2030 #define BTRFS_QGROUP_RELATION_KEY 246
2032 #define BTRFS_BALANCE_ITEM_KEY 248
2035 * Persistantly stores the io stats in the device tree.
2036 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
2038 #define BTRFS_DEV_STATS_KEY 249
2041 * Persistantly stores the device replace state in the device tree.
2042 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
2044 #define BTRFS_DEV_REPLACE_KEY 250
2047 * Stores items that allow to quickly map UUIDs to something else.
2048 * These items are part of the filesystem UUID tree.
2049 * The key is built like this:
2050 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
2052 #if BTRFS_UUID_SIZE != 16
2053 #error "UUID items require BTRFS_UUID_SIZE == 16!"
2055 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
2056 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
2057 * received subvols */
2060 * string items are for debugging. They just store a short string of
2063 #define BTRFS_STRING_ITEM_KEY 253
2066 * Flags for mount options.
2068 * Note: don't forget to add new options to btrfs_show_options()
2070 #define BTRFS_MOUNT_NODATASUM (1 << 0)
2071 #define BTRFS_MOUNT_NODATACOW (1 << 1)
2072 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
2073 #define BTRFS_MOUNT_SSD (1 << 3)
2074 #define BTRFS_MOUNT_DEGRADED (1 << 4)
2075 #define BTRFS_MOUNT_COMPRESS (1 << 5)
2076 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
2077 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
2078 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
2079 #define BTRFS_MOUNT_NOSSD (1 << 9)
2080 #define BTRFS_MOUNT_DISCARD (1 << 10)
2081 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
2082 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2083 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2084 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2085 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2086 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2087 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2088 #define BTRFS_MOUNT_RECOVERY (1 << 18)
2089 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2090 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2091 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2092 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2093 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2094 #define BTRFS_MOUNT_CHANGE_INODE_CACHE (1 << 24)
2096 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2098 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2099 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2100 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2101 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2103 #define btrfs_set_and_info(root, opt, fmt, args...) \
2105 if (!btrfs_test_opt(root, opt)) \
2106 btrfs_info(root->fs_info, fmt, ##args); \
2107 btrfs_set_opt(root->fs_info->mount_opt, opt); \
2110 #define btrfs_clear_and_info(root, opt, fmt, args...) \
2112 if (btrfs_test_opt(root, opt)) \
2113 btrfs_info(root->fs_info, fmt, ##args); \
2114 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
2120 #define BTRFS_INODE_NODATASUM (1 << 0)
2121 #define BTRFS_INODE_NODATACOW (1 << 1)
2122 #define BTRFS_INODE_READONLY (1 << 2)
2123 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2124 #define BTRFS_INODE_PREALLOC (1 << 4)
2125 #define BTRFS_INODE_SYNC (1 << 5)
2126 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2127 #define BTRFS_INODE_APPEND (1 << 7)
2128 #define BTRFS_INODE_NODUMP (1 << 8)
2129 #define BTRFS_INODE_NOATIME (1 << 9)
2130 #define BTRFS_INODE_DIRSYNC (1 << 10)
2131 #define BTRFS_INODE_COMPRESS (1 << 11)
2133 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2135 struct btrfs_map_token
{
2136 struct extent_buffer
*eb
;
2138 unsigned long offset
;
2141 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
2143 token
->kaddr
= NULL
;
2146 /* some macros to generate set/get funcs for the struct fields. This
2147 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2150 #define le8_to_cpu(v) (v)
2151 #define cpu_to_le8(v) (v)
2154 #define read_eb_member(eb, ptr, type, member, result) ( \
2155 read_extent_buffer(eb, (char *)(result), \
2156 ((unsigned long)(ptr)) + \
2157 offsetof(type, member), \
2158 sizeof(((type *)0)->member)))
2160 #define write_eb_member(eb, ptr, type, member, result) ( \
2161 write_extent_buffer(eb, (char *)(result), \
2162 ((unsigned long)(ptr)) + \
2163 offsetof(type, member), \
2164 sizeof(((type *)0)->member)))
2166 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2167 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2168 unsigned long off, \
2169 struct btrfs_map_token *token); \
2170 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2171 unsigned long off, u##bits val, \
2172 struct btrfs_map_token *token); \
2173 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2174 unsigned long off) \
2176 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2178 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2179 unsigned long off, u##bits val) \
2181 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2184 DECLARE_BTRFS_SETGET_BITS(8)
2185 DECLARE_BTRFS_SETGET_BITS(16)
2186 DECLARE_BTRFS_SETGET_BITS(32)
2187 DECLARE_BTRFS_SETGET_BITS(64)
2189 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2190 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2192 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2193 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2195 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2198 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2199 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2201 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2202 struct btrfs_map_token *token) \
2204 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2205 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2207 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2208 type *s, u##bits val, \
2209 struct btrfs_map_token *token) \
2211 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2212 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2215 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2216 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2218 type *p = page_address(eb->pages[0]); \
2219 u##bits res = le##bits##_to_cpu(p->member); \
2222 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2225 type *p = page_address(eb->pages[0]); \
2226 p->member = cpu_to_le##bits(val); \
2229 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2230 static inline u##bits btrfs_##name(type *s) \
2232 return le##bits##_to_cpu(s->member); \
2234 static inline void btrfs_set_##name(type *s, u##bits val) \
2236 s->member = cpu_to_le##bits(val); \
2239 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
2240 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
2241 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
2242 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
2243 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
2244 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
2246 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
2247 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
2248 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
2249 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
2250 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
2251 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
2253 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
2254 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
2256 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
2258 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
2260 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
2262 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
2264 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
2265 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
2267 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
2269 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
2271 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
2274 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
2276 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
2279 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
2281 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
2284 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
2285 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
2286 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
2287 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
2288 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
2289 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
2290 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
2291 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
2292 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
2293 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
2294 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
2296 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
2298 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
2301 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
2302 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
2303 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
2305 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
2307 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
2309 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
2311 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
2312 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
2314 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
2316 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
2317 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
2319 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
2322 unsigned long offset
= (unsigned long)c
;
2323 offset
+= offsetof(struct btrfs_chunk
, stripe
);
2324 offset
+= nr
* sizeof(struct btrfs_stripe
);
2325 return (struct btrfs_stripe
*)offset
;
2328 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
2330 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
2333 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
2334 struct btrfs_chunk
*c
, int nr
)
2336 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
2339 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
2340 struct btrfs_chunk
*c
, int nr
)
2342 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
2345 /* struct btrfs_block_group_item */
2346 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
2348 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
2350 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
2351 struct btrfs_block_group_item
, chunk_objectid
, 64);
2353 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
2354 struct btrfs_block_group_item
, chunk_objectid
, 64);
2355 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
2356 struct btrfs_block_group_item
, flags
, 64);
2357 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
2358 struct btrfs_block_group_item
, flags
, 64);
2360 /* struct btrfs_inode_ref */
2361 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
2362 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
2364 /* struct btrfs_inode_extref */
2365 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
2366 parent_objectid
, 64);
2367 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
2369 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
2371 /* struct btrfs_inode_item */
2372 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
2373 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
2374 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
2375 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
2376 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
2377 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
2378 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2379 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
2380 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
2381 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
2382 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2383 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
2384 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
2386 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
2388 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
2390 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
2391 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
2393 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
2395 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2396 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
2397 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
2398 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
2399 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2400 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
2402 static inline struct btrfs_timespec
*
2403 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
2405 unsigned long ptr
= (unsigned long)inode_item
;
2406 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
2407 return (struct btrfs_timespec
*)ptr
;
2410 static inline struct btrfs_timespec
*
2411 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
2413 unsigned long ptr
= (unsigned long)inode_item
;
2414 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
2415 return (struct btrfs_timespec
*)ptr
;
2418 static inline struct btrfs_timespec
*
2419 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
2421 unsigned long ptr
= (unsigned long)inode_item
;
2422 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
2423 return (struct btrfs_timespec
*)ptr
;
2426 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
2427 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2428 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
2429 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2431 /* struct btrfs_dev_extent */
2432 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
2434 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
2435 chunk_objectid
, 64);
2436 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
2438 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
2440 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
2442 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
2443 return (unsigned long)dev
+ ptr
;
2446 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
2447 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
2449 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
2451 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
2454 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
2456 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
2457 struct btrfs_tree_block_info
*item
,
2458 struct btrfs_disk_key
*key
)
2460 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2463 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
2464 struct btrfs_tree_block_info
*item
,
2465 struct btrfs_disk_key
*key
)
2467 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2470 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
2472 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
2474 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
2476 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
2479 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
2482 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
2484 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
2487 static inline u32
btrfs_extent_inline_ref_size(int type
)
2489 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
2490 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
2491 return sizeof(struct btrfs_extent_inline_ref
);
2492 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
2493 return sizeof(struct btrfs_shared_data_ref
) +
2494 sizeof(struct btrfs_extent_inline_ref
);
2495 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
2496 return sizeof(struct btrfs_extent_data_ref
) +
2497 offsetof(struct btrfs_extent_inline_ref
, offset
);
2502 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
2503 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
2505 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
2506 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
2508 /* struct btrfs_node */
2509 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
2510 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
2511 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
2513 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
2516 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
2519 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2520 sizeof(struct btrfs_key_ptr
) * nr
;
2521 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
2524 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
2528 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2529 sizeof(struct btrfs_key_ptr
) * nr
;
2530 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2533 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
2536 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2537 sizeof(struct btrfs_key_ptr
) * nr
;
2538 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
2541 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
2545 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2546 sizeof(struct btrfs_key_ptr
) * nr
;
2547 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2550 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
2552 return offsetof(struct btrfs_node
, ptrs
) +
2553 sizeof(struct btrfs_key_ptr
) * nr
;
2556 void btrfs_node_key(struct extent_buffer
*eb
,
2557 struct btrfs_disk_key
*disk_key
, int nr
);
2559 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
2560 struct btrfs_disk_key
*disk_key
, int nr
)
2563 ptr
= btrfs_node_key_ptr_offset(nr
);
2564 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
2565 struct btrfs_key_ptr
, key
, disk_key
);
2568 /* struct btrfs_item */
2569 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
2570 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
2571 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
2572 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
2574 static inline unsigned long btrfs_item_nr_offset(int nr
)
2576 return offsetof(struct btrfs_leaf
, items
) +
2577 sizeof(struct btrfs_item
) * nr
;
2580 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
2582 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
2585 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
2586 struct btrfs_item
*item
)
2588 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
2591 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
2593 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
2596 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
2598 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
2601 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
2603 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
2606 static inline void btrfs_item_key(struct extent_buffer
*eb
,
2607 struct btrfs_disk_key
*disk_key
, int nr
)
2609 struct btrfs_item
*item
= btrfs_item_nr(nr
);
2610 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2613 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
2614 struct btrfs_disk_key
*disk_key
, int nr
)
2616 struct btrfs_item
*item
= btrfs_item_nr(nr
);
2617 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2620 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
2623 * struct btrfs_root_ref
2625 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
2626 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
2627 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
2629 /* struct btrfs_dir_item */
2630 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2631 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2632 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2633 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2634 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
2635 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
2637 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
2639 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
2642 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
2643 struct btrfs_dir_item
*item
,
2644 struct btrfs_disk_key
*key
)
2646 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2649 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2650 struct btrfs_dir_item
*item
,
2651 struct btrfs_disk_key
*key
)
2653 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2656 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2658 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2660 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2663 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
2664 struct btrfs_free_space_header
*h
,
2665 struct btrfs_disk_key
*key
)
2667 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2670 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2671 struct btrfs_free_space_header
*h
,
2672 struct btrfs_disk_key
*key
)
2674 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2677 /* struct btrfs_disk_key */
2678 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2680 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2681 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2683 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2684 struct btrfs_disk_key
*disk
)
2686 cpu
->offset
= le64_to_cpu(disk
->offset
);
2687 cpu
->type
= disk
->type
;
2688 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2691 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2692 struct btrfs_key
*cpu
)
2694 disk
->offset
= cpu_to_le64(cpu
->offset
);
2695 disk
->type
= cpu
->type
;
2696 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2699 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2700 struct btrfs_key
*key
, int nr
)
2702 struct btrfs_disk_key disk_key
;
2703 btrfs_node_key(eb
, &disk_key
, nr
);
2704 btrfs_disk_key_to_cpu(key
, &disk_key
);
2707 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2708 struct btrfs_key
*key
, int nr
)
2710 struct btrfs_disk_key disk_key
;
2711 btrfs_item_key(eb
, &disk_key
, nr
);
2712 btrfs_disk_key_to_cpu(key
, &disk_key
);
2715 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2716 struct btrfs_dir_item
*item
,
2717 struct btrfs_key
*key
)
2719 struct btrfs_disk_key disk_key
;
2720 btrfs_dir_item_key(eb
, item
, &disk_key
);
2721 btrfs_disk_key_to_cpu(key
, &disk_key
);
2725 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2730 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2735 /* struct btrfs_header */
2736 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2737 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2739 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2740 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2741 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2742 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2743 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
2745 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
2746 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
2748 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
2750 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2752 return (btrfs_header_flags(eb
) & flag
) == flag
;
2755 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2757 u64 flags
= btrfs_header_flags(eb
);
2758 btrfs_set_header_flags(eb
, flags
| flag
);
2759 return (flags
& flag
) == flag
;
2762 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2764 u64 flags
= btrfs_header_flags(eb
);
2765 btrfs_set_header_flags(eb
, flags
& ~flag
);
2766 return (flags
& flag
) == flag
;
2769 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2771 u64 flags
= btrfs_header_flags(eb
);
2772 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2775 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2778 u64 flags
= btrfs_header_flags(eb
);
2779 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2780 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2781 btrfs_set_header_flags(eb
, flags
);
2784 static inline unsigned long btrfs_header_fsid(void)
2786 return offsetof(struct btrfs_header
, fsid
);
2789 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2791 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
2794 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2796 return btrfs_header_level(eb
) == 0;
2799 /* struct btrfs_root_item */
2800 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2802 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2803 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2804 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2806 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2808 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2809 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2810 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2811 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2812 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2813 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2814 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2815 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2817 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2819 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2821 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2823 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2825 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2828 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2830 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2833 static inline bool btrfs_root_dead(struct btrfs_root
*root
)
2835 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD
)) != 0;
2838 /* struct btrfs_root_backup */
2839 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2841 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2843 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2844 tree_root_level
, 8);
2846 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2848 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2849 chunk_root_gen
, 64);
2850 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2851 chunk_root_level
, 8);
2853 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2855 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2856 extent_root_gen
, 64);
2857 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2858 extent_root_level
, 8);
2860 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2862 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2864 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2867 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2869 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2871 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2874 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2876 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2878 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2879 csum_root_level
, 8);
2880 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2882 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2884 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2887 /* struct btrfs_balance_item */
2888 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2890 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2891 struct btrfs_balance_item
*bi
,
2892 struct btrfs_disk_balance_args
*ba
)
2894 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2897 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2898 struct btrfs_balance_item
*bi
,
2899 struct btrfs_disk_balance_args
*ba
)
2901 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2904 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2905 struct btrfs_balance_item
*bi
,
2906 struct btrfs_disk_balance_args
*ba
)
2908 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2911 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2912 struct btrfs_balance_item
*bi
,
2913 struct btrfs_disk_balance_args
*ba
)
2915 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2918 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2919 struct btrfs_balance_item
*bi
,
2920 struct btrfs_disk_balance_args
*ba
)
2922 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2925 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2926 struct btrfs_balance_item
*bi
,
2927 struct btrfs_disk_balance_args
*ba
)
2929 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2933 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2934 struct btrfs_disk_balance_args
*disk
)
2936 memset(cpu
, 0, sizeof(*cpu
));
2938 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2939 cpu
->usage
= le64_to_cpu(disk
->usage
);
2940 cpu
->devid
= le64_to_cpu(disk
->devid
);
2941 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2942 cpu
->pend
= le64_to_cpu(disk
->pend
);
2943 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2944 cpu
->vend
= le64_to_cpu(disk
->vend
);
2945 cpu
->target
= le64_to_cpu(disk
->target
);
2946 cpu
->flags
= le64_to_cpu(disk
->flags
);
2947 cpu
->limit
= le64_to_cpu(disk
->limit
);
2951 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2952 struct btrfs_balance_args
*cpu
)
2954 memset(disk
, 0, sizeof(*disk
));
2956 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2957 disk
->usage
= cpu_to_le64(cpu
->usage
);
2958 disk
->devid
= cpu_to_le64(cpu
->devid
);
2959 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2960 disk
->pend
= cpu_to_le64(cpu
->pend
);
2961 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2962 disk
->vend
= cpu_to_le64(cpu
->vend
);
2963 disk
->target
= cpu_to_le64(cpu
->target
);
2964 disk
->flags
= cpu_to_le64(cpu
->flags
);
2965 disk
->limit
= cpu_to_le64(cpu
->limit
);
2968 /* struct btrfs_super_block */
2969 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2970 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2971 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2973 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2974 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2975 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2976 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2977 struct btrfs_super_block
, chunk_root_generation
, 64);
2978 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2980 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2982 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2983 chunk_root_level
, 8);
2984 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2986 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2987 log_root_transid
, 64);
2988 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2990 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2992 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2994 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2996 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2998 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
3000 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
3002 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
3003 root_dir_objectid
, 64);
3004 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
3006 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
3008 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
3009 compat_ro_flags
, 64);
3010 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
3011 incompat_flags
, 64);
3012 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
3014 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
3015 cache_generation
, 64);
3016 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
3017 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
3018 uuid_tree_generation
, 64);
3020 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
3022 u16 t
= btrfs_super_csum_type(s
);
3024 * csum type is validated at mount time
3026 return btrfs_csum_sizes
[t
];
3029 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
3031 return offsetof(struct btrfs_leaf
, items
);
3034 /* struct btrfs_file_extent_item */
3035 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
3036 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
3037 struct btrfs_file_extent_item
, disk_bytenr
, 64);
3038 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
3039 struct btrfs_file_extent_item
, offset
, 64);
3040 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
3041 struct btrfs_file_extent_item
, generation
, 64);
3042 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
3043 struct btrfs_file_extent_item
, num_bytes
, 64);
3044 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
3045 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
3046 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
3047 struct btrfs_file_extent_item
, compression
, 8);
3049 static inline unsigned long
3050 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
3052 unsigned long offset
= (unsigned long)e
;
3053 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
3057 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
3059 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
3062 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
3064 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
3066 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
3067 disk_num_bytes
, 64);
3068 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
3070 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
3072 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
3074 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
3076 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
3078 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
3079 other_encoding
, 16);
3082 * this returns the number of bytes used by the item on disk, minus the
3083 * size of any extent headers. If a file is compressed on disk, this is
3084 * the compressed size
3086 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
3087 struct btrfs_item
*e
)
3089 unsigned long offset
;
3090 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
3091 return btrfs_item_size(eb
, e
) - offset
;
3094 /* this returns the number of file bytes represented by the inline item.
3095 * If an item is compressed, this is the uncompressed size
3097 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
3099 struct btrfs_file_extent_item
*fi
)
3101 struct btrfs_map_token token
;
3103 btrfs_init_map_token(&token
);
3105 * return the space used on disk if this item isn't
3106 * compressed or encoded
3108 if (btrfs_token_file_extent_compression(eb
, fi
, &token
) == 0 &&
3109 btrfs_token_file_extent_encryption(eb
, fi
, &token
) == 0 &&
3110 btrfs_token_file_extent_other_encoding(eb
, fi
, &token
) == 0) {
3111 return btrfs_file_extent_inline_item_len(eb
,
3112 btrfs_item_nr(slot
));
3115 /* otherwise use the ram bytes field */
3116 return btrfs_token_file_extent_ram_bytes(eb
, fi
, &token
);
3120 /* btrfs_dev_stats_item */
3121 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
3122 struct btrfs_dev_stats_item
*ptr
,
3127 read_extent_buffer(eb
, &val
,
3128 offsetof(struct btrfs_dev_stats_item
, values
) +
3129 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
3134 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
3135 struct btrfs_dev_stats_item
*ptr
,
3138 write_extent_buffer(eb
, &val
,
3139 offsetof(struct btrfs_dev_stats_item
, values
) +
3140 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
3144 /* btrfs_qgroup_status_item */
3145 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
3147 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
3149 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
3151 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
3154 /* btrfs_qgroup_info_item */
3155 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
3157 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
3158 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
3160 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
3161 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
3164 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
3165 struct btrfs_qgroup_info_item
, generation
, 64);
3166 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
3168 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
3169 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
3170 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
3172 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
3173 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
3175 /* btrfs_qgroup_limit_item */
3176 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
3178 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
3180 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
3182 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
3184 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
3187 /* btrfs_dev_replace_item */
3188 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
3189 struct btrfs_dev_replace_item
, src_devid
, 64);
3190 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
3191 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
3193 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
3195 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
3197 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
3199 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
3200 num_write_errors
, 64);
3201 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
3202 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
3204 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
3206 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
3209 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
3210 struct btrfs_dev_replace_item
, src_devid
, 64);
3211 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
3212 struct btrfs_dev_replace_item
,
3213 cont_reading_from_srcdev_mode
, 64);
3214 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
3215 struct btrfs_dev_replace_item
, replace_state
, 64);
3216 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
3217 struct btrfs_dev_replace_item
, time_started
, 64);
3218 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
3219 struct btrfs_dev_replace_item
, time_stopped
, 64);
3220 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
3221 struct btrfs_dev_replace_item
, num_write_errors
, 64);
3222 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
3223 struct btrfs_dev_replace_item
,
3224 num_uncorrectable_read_errors
, 64);
3225 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
3226 struct btrfs_dev_replace_item
, cursor_left
, 64);
3227 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
3228 struct btrfs_dev_replace_item
, cursor_right
, 64);
3230 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
3232 return sb
->s_fs_info
;
3235 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
3238 return root
->leafsize
;
3239 return root
->nodesize
;
3242 /* helper function to cast into the data area of the leaf. */
3243 #define btrfs_item_ptr(leaf, slot, type) \
3244 ((type *)(btrfs_leaf_data(leaf) + \
3245 btrfs_item_offset_nr(leaf, slot)))
3247 #define btrfs_item_ptr_offset(leaf, slot) \
3248 ((unsigned long)(btrfs_leaf_data(leaf) + \
3249 btrfs_item_offset_nr(leaf, slot)))
3251 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
3253 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
3254 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
3257 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
3259 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
3263 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
3266 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
3271 * Doing a truncate won't result in new nodes or leaves, just what we need for
3274 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
3277 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
3281 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle
*trans
,
3282 struct btrfs_root
*root
);
3283 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle
*trans
,
3284 struct btrfs_root
*root
);
3285 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
3286 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
3287 struct btrfs_root
*root
, unsigned long count
);
3288 int btrfs_async_run_delayed_refs(struct btrfs_root
*root
,
3289 unsigned long count
, int wait
);
3290 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
3291 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
3292 struct btrfs_root
*root
, u64 bytenr
,
3293 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
3294 int btrfs_pin_extent(struct btrfs_root
*root
,
3295 u64 bytenr
, u64 num
, int reserved
);
3296 int btrfs_pin_extent_for_log_replay(struct btrfs_root
*root
,
3297 u64 bytenr
, u64 num_bytes
);
3298 int btrfs_exclude_logged_extents(struct btrfs_root
*root
,
3299 struct extent_buffer
*eb
);
3300 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
3301 struct btrfs_root
*root
,
3302 u64 objectid
, u64 offset
, u64 bytenr
);
3303 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
3304 struct btrfs_fs_info
*info
,
3306 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
3307 int get_block_group_index(struct btrfs_block_group_cache
*cache
);
3308 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
3309 struct btrfs_root
*root
, u32 blocksize
,
3310 u64 parent
, u64 root_objectid
,
3311 struct btrfs_disk_key
*key
, int level
,
3312 u64 hint
, u64 empty_size
);
3313 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
3314 struct btrfs_root
*root
,
3315 struct extent_buffer
*buf
,
3316 u64 parent
, int last_ref
);
3317 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
3318 struct btrfs_root
*root
,
3319 u64 root_objectid
, u64 owner
,
3320 u64 offset
, struct btrfs_key
*ins
);
3321 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
3322 struct btrfs_root
*root
,
3323 u64 root_objectid
, u64 owner
, u64 offset
,
3324 struct btrfs_key
*ins
);
3325 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 num_bytes
,
3326 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
3327 struct btrfs_key
*ins
, int is_data
, int delalloc
);
3328 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3329 struct extent_buffer
*buf
, int full_backref
, int no_quota
);
3330 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3331 struct extent_buffer
*buf
, int full_backref
, int no_quota
);
3332 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
3333 struct btrfs_root
*root
,
3334 u64 bytenr
, u64 num_bytes
, u64 flags
,
3335 int level
, int is_data
);
3336 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
3337 struct btrfs_root
*root
,
3338 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
3339 u64 owner
, u64 offset
, int no_quota
);
3341 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
,
3343 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
3344 u64 start
, u64 len
);
3345 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
3346 struct btrfs_root
*root
);
3347 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
3348 struct btrfs_root
*root
);
3349 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
3350 struct btrfs_root
*root
,
3351 u64 bytenr
, u64 num_bytes
, u64 parent
,
3352 u64 root_objectid
, u64 owner
, u64 offset
, int no_quota
);
3354 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
3355 struct btrfs_root
*root
);
3356 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
3357 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
3358 int btrfs_read_block_groups(struct btrfs_root
*root
);
3359 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
3360 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
3361 struct btrfs_root
*root
, u64 bytes_used
,
3362 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
3364 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
3365 struct btrfs_root
*root
, u64 group_start
);
3366 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
3367 struct btrfs_root
*root
);
3368 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
3369 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
3371 enum btrfs_reserve_flush_enum
{
3372 /* If we are in the transaction, we can't flush anything.*/
3373 BTRFS_RESERVE_NO_FLUSH
,
3375 * Flushing delalloc may cause deadlock somewhere, in this
3376 * case, use FLUSH LIMIT
3378 BTRFS_RESERVE_FLUSH_LIMIT
,
3379 BTRFS_RESERVE_FLUSH_ALL
,
3382 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
3383 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
3384 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
3385 struct btrfs_root
*root
);
3386 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
3387 struct inode
*inode
);
3388 void btrfs_orphan_release_metadata(struct inode
*inode
);
3389 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
3390 struct btrfs_block_rsv
*rsv
,
3392 u64
*qgroup_reserved
, bool use_global_rsv
);
3393 void btrfs_subvolume_release_metadata(struct btrfs_root
*root
,
3394 struct btrfs_block_rsv
*rsv
,
3395 u64 qgroup_reserved
);
3396 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
3397 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
3398 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
3399 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
3400 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
3401 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
3402 unsigned short type
);
3403 void btrfs_free_block_rsv(struct btrfs_root
*root
,
3404 struct btrfs_block_rsv
*rsv
);
3405 int btrfs_block_rsv_add(struct btrfs_root
*root
,
3406 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
3407 enum btrfs_reserve_flush_enum flush
);
3408 int btrfs_block_rsv_check(struct btrfs_root
*root
,
3409 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
3410 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
3411 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
3412 enum btrfs_reserve_flush_enum flush
);
3413 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
3414 struct btrfs_block_rsv
*dst_rsv
,
3416 int btrfs_cond_migrate_bytes(struct btrfs_fs_info
*fs_info
,
3417 struct btrfs_block_rsv
*dest
, u64 num_bytes
,
3419 void btrfs_block_rsv_release(struct btrfs_root
*root
,
3420 struct btrfs_block_rsv
*block_rsv
,
3422 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
3423 struct btrfs_block_group_cache
*cache
);
3424 void btrfs_set_block_group_rw(struct btrfs_root
*root
,
3425 struct btrfs_block_group_cache
*cache
);
3426 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
3427 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
3428 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
3429 u64 start
, u64 end
);
3430 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
3431 u64 num_bytes
, u64
*actual_bytes
);
3432 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
3433 struct btrfs_root
*root
, u64 type
);
3434 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
3436 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
3437 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
3438 struct btrfs_fs_info
*fs_info
);
3439 int __get_raid_index(u64 flags
);
3440 int btrfs_start_nocow_write(struct btrfs_root
*root
);
3441 void btrfs_end_nocow_write(struct btrfs_root
*root
);
3443 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
3444 int level
, int *slot
);
3445 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
3446 int btrfs_previous_item(struct btrfs_root
*root
,
3447 struct btrfs_path
*path
, u64 min_objectid
,
3449 int btrfs_previous_extent_item(struct btrfs_root
*root
,
3450 struct btrfs_path
*path
, u64 min_objectid
);
3451 void btrfs_set_item_key_safe(struct btrfs_root
*root
, struct btrfs_path
*path
,
3452 struct btrfs_key
*new_key
);
3453 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
3454 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
3455 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
3456 struct btrfs_key
*key
, int lowest_level
,
3458 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
3459 struct btrfs_path
*path
,
3461 enum btrfs_compare_tree_result
{
3462 BTRFS_COMPARE_TREE_NEW
,
3463 BTRFS_COMPARE_TREE_DELETED
,
3464 BTRFS_COMPARE_TREE_CHANGED
,
3465 BTRFS_COMPARE_TREE_SAME
,
3467 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
3468 struct btrfs_root
*right_root
,
3469 struct btrfs_path
*left_path
,
3470 struct btrfs_path
*right_path
,
3471 struct btrfs_key
*key
,
3472 enum btrfs_compare_tree_result result
,
3474 int btrfs_compare_trees(struct btrfs_root
*left_root
,
3475 struct btrfs_root
*right_root
,
3476 btrfs_changed_cb_t cb
, void *ctx
);
3477 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
3478 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3479 struct extent_buffer
*parent
, int parent_slot
,
3480 struct extent_buffer
**cow_ret
);
3481 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
3482 struct btrfs_root
*root
,
3483 struct extent_buffer
*buf
,
3484 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
3485 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
3486 struct extent_buffer
*buf
);
3487 void btrfs_extend_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
3489 void btrfs_truncate_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
3490 u32 new_size
, int from_end
);
3491 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
3492 struct btrfs_root
*root
,
3493 struct btrfs_path
*path
,
3494 struct btrfs_key
*new_key
,
3495 unsigned long split_offset
);
3496 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
3497 struct btrfs_root
*root
,
3498 struct btrfs_path
*path
,
3499 struct btrfs_key
*new_key
);
3500 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*path
,
3501 u64 inum
, u64 ioff
, u8 key_type
, struct btrfs_key
*found_key
);
3502 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
3503 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
3505 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
3506 struct btrfs_path
*p
, u64 time_seq
);
3507 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
3508 struct btrfs_key
*key
, struct btrfs_path
*p
,
3509 int find_higher
, int return_any
);
3510 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
3511 struct btrfs_root
*root
, struct extent_buffer
*parent
,
3512 int start_slot
, u64
*last_ret
,
3513 struct btrfs_key
*progress
);
3514 void btrfs_release_path(struct btrfs_path
*p
);
3515 struct btrfs_path
*btrfs_alloc_path(void);
3516 void btrfs_free_path(struct btrfs_path
*p
);
3517 void btrfs_set_path_blocking(struct btrfs_path
*p
);
3518 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
3519 struct extent_buffer
*held
, int held_rw
);
3520 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
3522 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3523 struct btrfs_path
*path
, int slot
, int nr
);
3524 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
3525 struct btrfs_root
*root
,
3526 struct btrfs_path
*path
)
3528 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
3531 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
3532 struct btrfs_key
*cpu_key
, u32
*data_size
,
3533 u32 total_data
, u32 total_size
, int nr
);
3534 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
3535 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
3536 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
3537 struct btrfs_root
*root
,
3538 struct btrfs_path
*path
,
3539 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
3541 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
3542 struct btrfs_root
*root
,
3543 struct btrfs_path
*path
,
3544 struct btrfs_key
*key
,
3547 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
3550 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3551 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3552 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
3554 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
3555 struct btrfs_path
*p
, u64 time_seq
)
3558 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
3559 return btrfs_next_old_leaf(root
, p
, time_seq
);
3562 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
3564 return btrfs_next_old_item(root
, p
, 0);
3566 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
3567 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
3568 struct btrfs_block_rsv
*block_rsv
,
3569 int update_ref
, int for_reloc
);
3570 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
3571 struct btrfs_root
*root
,
3572 struct extent_buffer
*node
,
3573 struct extent_buffer
*parent
);
3574 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
3577 * Get synced with close_ctree()
3580 return fs_info
->closing
;
3584 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3585 * anything except sleeping. This function is used to check the status of
3588 static inline int btrfs_need_cleaner_sleep(struct btrfs_root
*root
)
3590 return (root
->fs_info
->sb
->s_flags
& MS_RDONLY
||
3591 btrfs_fs_closing(root
->fs_info
));
3594 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
3596 kfree(fs_info
->balance_ctl
);
3597 kfree(fs_info
->delayed_root
);
3598 kfree(fs_info
->extent_root
);
3599 kfree(fs_info
->tree_root
);
3600 kfree(fs_info
->chunk_root
);
3601 kfree(fs_info
->dev_root
);
3602 kfree(fs_info
->csum_root
);
3603 kfree(fs_info
->quota_root
);
3604 kfree(fs_info
->uuid_root
);
3605 kfree(fs_info
->super_copy
);
3606 kfree(fs_info
->super_for_commit
);
3610 /* tree mod log functions from ctree.c */
3611 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3612 struct seq_list
*elem
);
3613 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3614 struct seq_list
*elem
);
3615 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
3618 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
3619 struct btrfs_path
*path
,
3620 u64 root_id
, u64 ref_id
);
3621 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
3622 struct btrfs_root
*tree_root
,
3623 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
3624 const char *name
, int name_len
);
3625 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
3626 struct btrfs_root
*tree_root
,
3627 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
3628 const char *name
, int name_len
);
3629 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3630 struct btrfs_key
*key
);
3631 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
3632 *root
, struct btrfs_key
*key
, struct btrfs_root_item
3634 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
3635 struct btrfs_root
*root
,
3636 struct btrfs_key
*key
,
3637 struct btrfs_root_item
*item
);
3638 int btrfs_find_root(struct btrfs_root
*root
, struct btrfs_key
*search_key
,
3639 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
3640 struct btrfs_key
*root_key
);
3641 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
3642 void btrfs_set_root_node(struct btrfs_root_item
*item
,
3643 struct extent_buffer
*node
);
3644 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
3645 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
3646 struct btrfs_root
*root
);
3649 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
,
3650 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
3652 int btrfs_uuid_tree_rem(struct btrfs_trans_handle
*trans
,
3653 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
3655 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
,
3656 int (*check_func
)(struct btrfs_fs_info
*, u8
*, u8
,
3660 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
3661 const char *name
, int name_len
);
3662 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
3663 struct btrfs_root
*root
, const char *name
,
3664 int name_len
, struct inode
*dir
,
3665 struct btrfs_key
*location
, u8 type
, u64 index
);
3666 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3667 struct btrfs_root
*root
,
3668 struct btrfs_path
*path
, u64 dir
,
3669 const char *name
, int name_len
,
3671 struct btrfs_dir_item
*
3672 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3673 struct btrfs_root
*root
,
3674 struct btrfs_path
*path
, u64 dir
,
3675 u64 objectid
, const char *name
, int name_len
,
3677 struct btrfs_dir_item
*
3678 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3679 struct btrfs_path
*path
, u64 dirid
,
3680 const char *name
, int name_len
);
3681 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3682 struct btrfs_root
*root
,
3683 struct btrfs_path
*path
,
3684 struct btrfs_dir_item
*di
);
3685 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3686 struct btrfs_root
*root
,
3687 struct btrfs_path
*path
, u64 objectid
,
3688 const char *name
, u16 name_len
,
3689 const void *data
, u16 data_len
);
3690 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3691 struct btrfs_root
*root
,
3692 struct btrfs_path
*path
, u64 dir
,
3693 const char *name
, u16 name_len
,
3695 int verify_dir_item(struct btrfs_root
*root
,
3696 struct extent_buffer
*leaf
,
3697 struct btrfs_dir_item
*dir_item
);
3700 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3701 struct btrfs_root
*root
, u64 offset
);
3702 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3703 struct btrfs_root
*root
, u64 offset
);
3704 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3707 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3708 struct btrfs_root
*root
,
3709 const char *name
, int name_len
,
3710 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3711 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3712 struct btrfs_root
*root
,
3713 const char *name
, int name_len
,
3714 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3715 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3716 struct btrfs_root
*root
,
3717 struct btrfs_path
*path
, u64 objectid
);
3718 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3719 *root
, struct btrfs_path
*path
,
3720 struct btrfs_key
*location
, int mod
);
3722 struct btrfs_inode_extref
*
3723 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3724 struct btrfs_root
*root
,
3725 struct btrfs_path
*path
,
3726 const char *name
, int name_len
,
3727 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3730 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3731 u64 ref_objectid
, const char *name
,
3733 struct btrfs_inode_extref
**extref_ret
);
3736 struct btrfs_dio_private
;
3737 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3738 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3739 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3740 struct bio
*bio
, u32
*dst
);
3741 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3742 struct btrfs_dio_private
*dip
, struct bio
*bio
,
3743 u64 logical_offset
);
3744 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3745 struct btrfs_root
*root
,
3746 u64 objectid
, u64 pos
,
3747 u64 disk_offset
, u64 disk_num_bytes
,
3748 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3749 u8 compression
, u8 encryption
, u16 other_encoding
);
3750 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3751 struct btrfs_root
*root
,
3752 struct btrfs_path
*path
, u64 objectid
,
3753 u64 bytenr
, int mod
);
3754 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3755 struct btrfs_root
*root
,
3756 struct btrfs_ordered_sum
*sums
);
3757 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3758 struct bio
*bio
, u64 file_start
, int contig
);
3759 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3760 struct list_head
*list
, int search_commit
);
3761 void btrfs_extent_item_to_extent_map(struct inode
*inode
,
3762 const struct btrfs_path
*path
,
3763 struct btrfs_file_extent_item
*fi
,
3764 const bool new_inline
,
3765 struct extent_map
*em
);
3768 struct btrfs_delalloc_work
{
3769 struct inode
*inode
;
3772 struct completion completion
;
3773 struct list_head list
;
3774 struct btrfs_work work
;
3777 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3778 int wait
, int delay_iput
);
3779 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3781 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3782 size_t pg_offset
, u64 start
, u64 len
,
3784 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
3785 u64
*orig_start
, u64
*orig_block_len
,
3788 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3789 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3790 #define ClearPageChecked ClearPageFsMisc
3791 #define SetPageChecked SetPageFsMisc
3792 #define PageChecked PageFsMisc
3795 /* This forces readahead on a given range of bytes in an inode */
3796 static inline void btrfs_force_ra(struct address_space
*mapping
,
3797 struct file_ra_state
*ra
, struct file
*file
,
3798 pgoff_t offset
, unsigned long req_size
)
3800 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3803 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3804 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3805 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3806 struct btrfs_root
*root
,
3807 struct inode
*dir
, struct inode
*inode
,
3808 const char *name
, int name_len
);
3809 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3810 struct inode
*parent_inode
, struct inode
*inode
,
3811 const char *name
, int name_len
, int add_backref
, u64 index
);
3812 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3813 struct btrfs_root
*root
,
3814 struct inode
*dir
, u64 objectid
,
3815 const char *name
, int name_len
);
3816 int btrfs_truncate_page(struct inode
*inode
, loff_t from
, loff_t len
,
3818 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3819 struct btrfs_root
*root
,
3820 struct inode
*inode
, u64 new_size
,
3823 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3824 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, int delay_iput
,
3826 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3827 struct extent_state
**cached_state
);
3828 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3829 struct btrfs_root
*new_root
,
3830 struct btrfs_root
*parent_root
,
3832 int btrfs_merge_bio_hook(int rw
, struct page
*page
, unsigned long offset
,
3833 size_t size
, struct bio
*bio
,
3834 unsigned long bio_flags
);
3835 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3836 int btrfs_readpage(struct file
*file
, struct page
*page
);
3837 void btrfs_evict_inode(struct inode
*inode
);
3838 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3839 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3840 void btrfs_destroy_inode(struct inode
*inode
);
3841 int btrfs_drop_inode(struct inode
*inode
);
3842 int btrfs_init_cachep(void);
3843 void btrfs_destroy_cachep(void);
3844 long btrfs_ioctl_trans_end(struct file
*file
);
3845 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3846 struct btrfs_root
*root
, int *was_new
);
3847 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3848 size_t pg_offset
, u64 start
, u64 end
,
3850 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3851 struct btrfs_root
*root
,
3852 struct inode
*inode
);
3853 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3854 struct btrfs_root
*root
, struct inode
*inode
);
3855 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3856 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3857 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3858 struct btrfs_root
*root
);
3859 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3860 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3861 void btrfs_add_delayed_iput(struct inode
*inode
);
3862 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3863 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3864 u64 start
, u64 num_bytes
, u64 min_size
,
3865 loff_t actual_len
, u64
*alloc_hint
);
3866 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3867 struct btrfs_trans_handle
*trans
, int mode
,
3868 u64 start
, u64 num_bytes
, u64 min_size
,
3869 loff_t actual_len
, u64
*alloc_hint
);
3870 extern const struct dentry_operations btrfs_dentry_operations
;
3873 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3874 void btrfs_update_iflags(struct inode
*inode
);
3875 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3876 int btrfs_is_empty_uuid(u8
*uuid
);
3877 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3878 struct btrfs_ioctl_defrag_range_args
*range
,
3879 u64 newer_than
, unsigned long max_pages
);
3880 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3881 struct btrfs_ioctl_space_info
*space
);
3882 void update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
, int lock
,
3883 struct btrfs_ioctl_balance_args
*bargs
);
3887 int btrfs_auto_defrag_init(void);
3888 void btrfs_auto_defrag_exit(void);
3889 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3890 struct inode
*inode
);
3891 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3892 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3893 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3894 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3896 extern const struct file_operations btrfs_file_operations
;
3897 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3898 struct btrfs_root
*root
, struct inode
*inode
,
3899 struct btrfs_path
*path
, u64 start
, u64 end
,
3900 u64
*drop_end
, int drop_cache
,
3902 u32 extent_item_size
,
3904 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3905 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3906 u64 end
, int drop_cache
);
3907 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3908 struct inode
*inode
, u64 start
, u64 end
);
3909 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3910 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3911 struct page
**pages
, size_t num_pages
,
3912 loff_t pos
, size_t write_bytes
,
3913 struct extent_state
**cached
);
3916 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3917 struct btrfs_root
*root
);
3920 int btrfs_init_sysfs(void);
3921 void btrfs_exit_sysfs(void);
3922 int btrfs_sysfs_add_one(struct btrfs_fs_info
*fs_info
);
3923 void btrfs_sysfs_remove_one(struct btrfs_fs_info
*fs_info
);
3926 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3929 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
3930 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3932 #ifdef CONFIG_PRINTK
3934 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3936 static inline __printf(2, 3)
3937 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3942 #define btrfs_emerg(fs_info, fmt, args...) \
3943 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3944 #define btrfs_alert(fs_info, fmt, args...) \
3945 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3946 #define btrfs_crit(fs_info, fmt, args...) \
3947 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3948 #define btrfs_err(fs_info, fmt, args...) \
3949 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3950 #define btrfs_warn(fs_info, fmt, args...) \
3951 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3952 #define btrfs_notice(fs_info, fmt, args...) \
3953 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3954 #define btrfs_info(fs_info, fmt, args...) \
3955 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3958 #define btrfs_debug(fs_info, fmt, args...) \
3959 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3961 #define btrfs_debug(fs_info, fmt, args...) \
3962 no_printk(KERN_DEBUG fmt, ##args)
3965 #ifdef CONFIG_BTRFS_ASSERT
3967 static inline void assfail(char *expr
, char *file
, int line
)
3969 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
3974 #define ASSERT(expr) \
3975 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3977 #define ASSERT(expr) ((void)0)
3980 #define btrfs_assert()
3982 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3983 unsigned int line
, int errno
, const char *fmt
, ...);
3986 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3987 struct btrfs_root
*root
, const char *function
,
3988 unsigned int line
, int errno
);
3990 #define btrfs_set_fs_incompat(__fs_info, opt) \
3991 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3993 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3996 struct btrfs_super_block
*disk_super
;
3999 disk_super
= fs_info
->super_copy
;
4000 features
= btrfs_super_incompat_flags(disk_super
);
4001 if (!(features
& flag
)) {
4002 spin_lock(&fs_info
->super_lock
);
4003 features
= btrfs_super_incompat_flags(disk_super
);
4004 if (!(features
& flag
)) {
4006 btrfs_set_super_incompat_flags(disk_super
, features
);
4007 btrfs_info(fs_info
, "setting %llu feature flag",
4010 spin_unlock(&fs_info
->super_lock
);
4014 #define btrfs_fs_incompat(fs_info, opt) \
4015 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4017 static inline int __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
4019 struct btrfs_super_block
*disk_super
;
4020 disk_super
= fs_info
->super_copy
;
4021 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
4025 * Call btrfs_abort_transaction as early as possible when an error condition is
4026 * detected, that way the exact line number is reported.
4029 #define btrfs_abort_transaction(trans, root, errno) \
4031 __btrfs_abort_transaction(trans, root, __func__, \
4035 #define btrfs_std_error(fs_info, errno) \
4038 __btrfs_std_error((fs_info), __func__, \
4039 __LINE__, (errno), NULL); \
4042 #define btrfs_error(fs_info, errno, fmt, args...) \
4044 __btrfs_std_error((fs_info), __func__, __LINE__, \
4045 (errno), fmt, ##args); \
4049 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
4050 unsigned int line
, int errno
, const char *fmt
, ...);
4053 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
4054 * will panic(). Otherwise we BUG() here.
4056 #define btrfs_panic(fs_info, errno, fmt, args...) \
4058 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
4063 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
4064 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
4065 int btrfs_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
4066 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
4067 struct inode
*inode
, struct inode
*dir
);
4069 #define btrfs_get_acl NULL
4070 #define btrfs_set_acl NULL
4071 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
4072 struct inode
*inode
, struct inode
*dir
)
4079 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
4080 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
4081 struct btrfs_root
*root
);
4082 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
4083 struct btrfs_root
*root
);
4084 int btrfs_recover_relocation(struct btrfs_root
*root
);
4085 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
4086 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
4087 struct btrfs_root
*root
, struct extent_buffer
*buf
,
4088 struct extent_buffer
*cow
);
4089 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
4090 struct btrfs_pending_snapshot
*pending
,
4091 u64
*bytes_to_reserve
);
4092 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
4093 struct btrfs_pending_snapshot
*pending
);
4096 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
4097 u64 end
, struct btrfs_scrub_progress
*progress
,
4098 int readonly
, int is_dev_replace
);
4099 void btrfs_scrub_pause(struct btrfs_root
*root
);
4100 void btrfs_scrub_continue(struct btrfs_root
*root
);
4101 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
4102 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
4103 struct btrfs_device
*dev
);
4104 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
4105 struct btrfs_scrub_progress
*progress
);
4108 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info
*fs_info
);
4109 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info
*fs_info
);
4110 void btrfs_bio_counter_dec(struct btrfs_fs_info
*fs_info
);
4113 struct reada_control
{
4114 struct btrfs_root
*root
; /* tree to prefetch */
4115 struct btrfs_key key_start
;
4116 struct btrfs_key key_end
; /* exclusive */
4119 wait_queue_head_t wait
;
4121 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
4122 struct btrfs_key
*start
, struct btrfs_key
*end
);
4123 int btrfs_reada_wait(void *handle
);
4124 void btrfs_reada_detach(void *handle
);
4125 int btree_readahead_hook(struct btrfs_root
*root
, struct extent_buffer
*eb
,
4126 u64 start
, int err
);
4128 static inline int is_fstree(u64 rootid
)
4130 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
4131 (s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
)
4136 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
4138 return signal_pending(current
);
4141 /* Sanity test specific functions */
4142 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4143 void btrfs_test_destroy_inode(struct inode
*inode
);
4144 int btrfs_verify_qgroup_counts(struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
4145 u64 rfer
, u64 excl
);