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 "extent_io.h"
37 #include "extent_map.h"
38 #include "async-thread.h"
40 struct btrfs_trans_handle
;
41 struct btrfs_transaction
;
42 struct btrfs_pending_snapshot
;
43 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
44 extern struct kmem_cache
*btrfs_transaction_cachep
;
45 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
46 extern struct kmem_cache
*btrfs_path_cachep
;
47 extern struct kmem_cache
*btrfs_free_space_cachep
;
48 struct btrfs_ordered_sum
;
50 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
51 #define STATIC noinline
53 #define STATIC static noinline
56 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
58 #define BTRFS_MAX_MIRRORS 3
60 #define BTRFS_MAX_LEVEL 8
62 #define BTRFS_COMPAT_EXTENT_TREE_V0
65 * files bigger than this get some pre-flushing when they are added
66 * to the ordered operations list. That way we limit the total
67 * work done by the commit
69 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
71 /* holds pointers to all of the tree roots */
72 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
74 /* stores information about which extents are in use, and reference counts */
75 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
78 * chunk tree stores translations from logical -> physical block numbering
79 * the super block points to the chunk tree
81 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
84 * stores information about which areas of a given device are in use.
85 * one per device. The tree of tree roots points to the device tree
87 #define BTRFS_DEV_TREE_OBJECTID 4ULL
89 /* one per subvolume, storing files and directories */
90 #define BTRFS_FS_TREE_OBJECTID 5ULL
92 /* directory objectid inside the root tree */
93 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
95 /* holds checksums of all the data extents */
96 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
98 /* holds quota configuration and tracking */
99 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
101 /* for storing items that use the BTRFS_UUID_KEY* types */
102 #define BTRFS_UUID_TREE_OBJECTID 9ULL
104 /* for storing balance parameters in the root tree */
105 #define BTRFS_BALANCE_OBJECTID -4ULL
107 /* orhpan objectid for tracking unlinked/truncated files */
108 #define BTRFS_ORPHAN_OBJECTID -5ULL
110 /* does write ahead logging to speed up fsyncs */
111 #define BTRFS_TREE_LOG_OBJECTID -6ULL
112 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
114 /* for space balancing */
115 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
116 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
119 * extent checksums all have this objectid
120 * this allows them to share the logging tree
123 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
125 /* For storing free space cache */
126 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
129 * The inode number assigned to the special inode for storing
132 #define BTRFS_FREE_INO_OBJECTID -12ULL
134 /* dummy objectid represents multiple objectids */
135 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
138 * All files have objectids in this range.
140 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
141 #define BTRFS_LAST_FREE_OBJECTID -256ULL
142 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
146 * the device items go into the chunk tree. The key is in the form
147 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
149 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
151 #define BTRFS_BTREE_INODE_OBJECTID 1
153 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
155 #define BTRFS_DEV_REPLACE_DEVID 0ULL
158 * the max metadata block size. This limit is somewhat artificial,
159 * but the memmove costs go through the roof for larger blocks.
161 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
164 * we can actually store much bigger names, but lets not confuse the rest
167 #define BTRFS_NAME_LEN 255
170 * Theoretical limit is larger, but we keep this down to a sane
171 * value. That should limit greatly the possibility of collisions on
174 #define BTRFS_LINK_MAX 65535U
176 /* 32 bytes in various csum fields */
177 #define BTRFS_CSUM_SIZE 32
180 #define BTRFS_CSUM_TYPE_CRC32 0
182 static int btrfs_csum_sizes
[] = { 4, 0 };
184 /* four bytes for CRC32 */
185 #define BTRFS_EMPTY_DIR_SIZE 0
187 /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
188 #define REQ_GET_READ_MIRRORS (1 << 30)
190 #define BTRFS_FT_UNKNOWN 0
191 #define BTRFS_FT_REG_FILE 1
192 #define BTRFS_FT_DIR 2
193 #define BTRFS_FT_CHRDEV 3
194 #define BTRFS_FT_BLKDEV 4
195 #define BTRFS_FT_FIFO 5
196 #define BTRFS_FT_SOCK 6
197 #define BTRFS_FT_SYMLINK 7
198 #define BTRFS_FT_XATTR 8
199 #define BTRFS_FT_MAX 9
201 /* ioprio of readahead is set to idle */
202 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
204 #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
207 * The key defines the order in the tree, and so it also defines (optimal)
210 * objectid corresponds to the inode number.
212 * type tells us things about the object, and is a kind of stream selector.
213 * so for a given inode, keys with type of 1 might refer to the inode data,
214 * type of 2 may point to file data in the btree and type == 3 may point to
217 * offset is the starting byte offset for this key in the stream.
219 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
220 * in cpu native order. Otherwise they are identical and their sizes
221 * should be the same (ie both packed)
223 struct btrfs_disk_key
{
227 } __attribute__ ((__packed__
));
233 } __attribute__ ((__packed__
));
235 struct btrfs_mapping_tree
{
236 struct extent_map_tree map_tree
;
239 struct btrfs_dev_item
{
240 /* the internal btrfs device id */
243 /* size of the device */
249 /* optimal io alignment for this device */
252 /* optimal io width for this device */
255 /* minimal io size for this device */
258 /* type and info about this device */
261 /* expected generation for this device */
265 * starting byte of this partition on the device,
266 * to allow for stripe alignment in the future
270 /* grouping information for allocation decisions */
273 /* seek speed 0-100 where 100 is fastest */
276 /* bandwidth 0-100 where 100 is fastest */
279 /* btrfs generated uuid for this device */
280 u8 uuid
[BTRFS_UUID_SIZE
];
282 /* uuid of FS who owns this device */
283 u8 fsid
[BTRFS_UUID_SIZE
];
284 } __attribute__ ((__packed__
));
286 struct btrfs_stripe
{
289 u8 dev_uuid
[BTRFS_UUID_SIZE
];
290 } __attribute__ ((__packed__
));
293 /* size of this chunk in bytes */
296 /* objectid of the root referencing this chunk */
302 /* optimal io alignment for this chunk */
305 /* optimal io width for this chunk */
308 /* minimal io size for this chunk */
311 /* 2^16 stripes is quite a lot, a second limit is the size of a single
316 /* sub stripes only matter for raid10 */
318 struct btrfs_stripe stripe
;
319 /* additional stripes go here */
320 } __attribute__ ((__packed__
));
322 #define BTRFS_FREE_SPACE_EXTENT 1
323 #define BTRFS_FREE_SPACE_BITMAP 2
325 struct btrfs_free_space_entry
{
329 } __attribute__ ((__packed__
));
331 struct btrfs_free_space_header
{
332 struct btrfs_disk_key location
;
336 } __attribute__ ((__packed__
));
338 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
340 BUG_ON(num_stripes
== 0);
341 return sizeof(struct btrfs_chunk
) +
342 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
345 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
346 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
351 #define BTRFS_FS_STATE_ERROR 0
352 #define BTRFS_FS_STATE_REMOUNTING 1
353 #define BTRFS_FS_STATE_TRANS_ABORTED 2
355 /* Super block flags */
356 /* Errors detected */
357 #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
359 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
360 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
362 #define BTRFS_BACKREF_REV_MAX 256
363 #define BTRFS_BACKREF_REV_SHIFT 56
364 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
365 BTRFS_BACKREF_REV_SHIFT)
367 #define BTRFS_OLD_BACKREF_REV 0
368 #define BTRFS_MIXED_BACKREF_REV 1
371 * every tree block (leaf or node) starts with this header.
373 struct btrfs_header
{
374 /* these first four must match the super block */
375 u8 csum
[BTRFS_CSUM_SIZE
];
376 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
377 __le64 bytenr
; /* which block this node is supposed to live in */
380 /* allowed to be different from the super from here on down */
381 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
386 } __attribute__ ((__packed__
));
388 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
389 sizeof(struct btrfs_header)) / \
390 sizeof(struct btrfs_key_ptr))
391 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
392 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
393 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
394 sizeof(struct btrfs_item) - \
395 sizeof(struct btrfs_file_extent_item))
396 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
397 sizeof(struct btrfs_item) -\
398 sizeof(struct btrfs_dir_item))
402 * this is a very generous portion of the super block, giving us
403 * room to translate 14 chunks with 3 stripes each.
405 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
406 #define BTRFS_LABEL_SIZE 256
409 * just in case we somehow lose the roots and are not able to mount,
410 * we store an array of the roots from previous transactions
413 #define BTRFS_NUM_BACKUP_ROOTS 4
414 struct btrfs_root_backup
{
416 __le64 tree_root_gen
;
419 __le64 chunk_root_gen
;
422 __le64 extent_root_gen
;
431 __le64 csum_root_gen
;
441 u8 extent_root_level
;
445 /* future and to align */
447 } __attribute__ ((__packed__
));
450 * the super block basically lists the main trees of the FS
451 * it currently lacks any block count etc etc
453 struct btrfs_super_block
{
454 u8 csum
[BTRFS_CSUM_SIZE
];
455 /* the first 4 fields must match struct btrfs_header */
456 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
457 __le64 bytenr
; /* this block number */
460 /* allowed to be different from the btrfs_header from here own down */
467 /* this will help find the new super based on the log root */
468 __le64 log_root_transid
;
471 __le64 root_dir_objectid
;
477 __le32 sys_chunk_array_size
;
478 __le64 chunk_root_generation
;
480 __le64 compat_ro_flags
;
481 __le64 incompat_flags
;
486 struct btrfs_dev_item dev_item
;
488 char label
[BTRFS_LABEL_SIZE
];
490 __le64 cache_generation
;
491 __le64 uuid_tree_generation
;
493 /* future expansion */
495 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
496 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
497 } __attribute__ ((__packed__
));
500 * Compat flags that we support. If any incompat flags are set other than the
501 * ones specified below then we will fail to mount
503 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
504 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
505 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
506 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
508 * some patches floated around with a second compression method
509 * lets save that incompat here for when they do get in
510 * Note we don't actually support it, we're just reserving the
513 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
516 * older kernels tried to do bigger metadata blocks, but the
517 * code was pretty buggy. Lets not let them try anymore.
519 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
521 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
522 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
523 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
524 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
526 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
527 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
528 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
529 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
530 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
531 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
533 #define BTRFS_FEATURE_INCOMPAT_SUPP \
534 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
535 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
536 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
537 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
538 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
539 BTRFS_FEATURE_INCOMPAT_RAID56 | \
540 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
541 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
542 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
544 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
545 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
546 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
549 * A leaf is full of items. offset and size tell us where to find
550 * the item in the leaf (relative to the start of the data area)
553 struct btrfs_disk_key key
;
556 } __attribute__ ((__packed__
));
559 * leaves have an item area and a data area:
560 * [item0, item1....itemN] [free space] [dataN...data1, data0]
562 * The data is separate from the items to get the keys closer together
566 struct btrfs_header header
;
567 struct btrfs_item items
[];
568 } __attribute__ ((__packed__
));
571 * all non-leaf blocks are nodes, they hold only keys and pointers to
574 struct btrfs_key_ptr
{
575 struct btrfs_disk_key key
;
578 } __attribute__ ((__packed__
));
581 struct btrfs_header header
;
582 struct btrfs_key_ptr ptrs
[];
583 } __attribute__ ((__packed__
));
586 * btrfs_paths remember the path taken from the root down to the leaf.
587 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
588 * to any other levels that are present.
590 * The slots array records the index of the item or block pointer
591 * used while walking the tree.
594 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
595 int slots
[BTRFS_MAX_LEVEL
];
596 /* if there is real range locking, this locks field will change */
597 int locks
[BTRFS_MAX_LEVEL
];
599 /* keep some upper locks as we walk down */
603 * set by btrfs_split_item, tells search_slot to keep all locks
604 * and to force calls to keep space in the nodes
606 unsigned int search_for_split
:1;
607 unsigned int keep_locks
:1;
608 unsigned int skip_locking
:1;
609 unsigned int leave_spinning
:1;
610 unsigned int search_commit_root
:1;
614 * items in the extent btree are used to record the objectid of the
615 * owner of the block and the number of references
618 struct btrfs_extent_item
{
622 } __attribute__ ((__packed__
));
624 struct btrfs_extent_item_v0
{
626 } __attribute__ ((__packed__
));
628 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
629 sizeof(struct btrfs_item))
631 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
632 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
634 /* following flags only apply to tree blocks */
636 /* use full backrefs for extent pointers in the block */
637 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
640 * this flag is only used internally by scrub and may be changed at any time
641 * it is only declared here to avoid collisions
643 #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
645 struct btrfs_tree_block_info
{
646 struct btrfs_disk_key key
;
648 } __attribute__ ((__packed__
));
650 struct btrfs_extent_data_ref
{
655 } __attribute__ ((__packed__
));
657 struct btrfs_shared_data_ref
{
659 } __attribute__ ((__packed__
));
661 struct btrfs_extent_inline_ref
{
664 } __attribute__ ((__packed__
));
666 /* old style backrefs item */
667 struct btrfs_extent_ref_v0
{
672 } __attribute__ ((__packed__
));
675 /* dev extents record free space on individual devices. The owner
676 * field points back to the chunk allocation mapping tree that allocated
677 * the extent. The chunk tree uuid field is a way to double check the owner
679 struct btrfs_dev_extent
{
681 __le64 chunk_objectid
;
684 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
685 } __attribute__ ((__packed__
));
687 struct btrfs_inode_ref
{
691 } __attribute__ ((__packed__
));
693 struct btrfs_inode_extref
{
694 __le64 parent_objectid
;
699 } __attribute__ ((__packed__
));
701 struct btrfs_timespec
{
704 } __attribute__ ((__packed__
));
706 enum btrfs_compression_type
{
707 BTRFS_COMPRESS_NONE
= 0,
708 BTRFS_COMPRESS_ZLIB
= 1,
709 BTRFS_COMPRESS_LZO
= 2,
710 BTRFS_COMPRESS_TYPES
= 2,
711 BTRFS_COMPRESS_LAST
= 3,
714 struct btrfs_inode_item
{
715 /* nfs style generation number */
717 /* transid that last touched this inode */
729 /* modification sequence number for NFS */
733 * a little future expansion, for more than this we can
734 * just grow the inode item and version it
737 struct btrfs_timespec atime
;
738 struct btrfs_timespec ctime
;
739 struct btrfs_timespec mtime
;
740 struct btrfs_timespec otime
;
741 } __attribute__ ((__packed__
));
743 struct btrfs_dir_log_item
{
745 } __attribute__ ((__packed__
));
747 struct btrfs_dir_item
{
748 struct btrfs_disk_key location
;
753 } __attribute__ ((__packed__
));
755 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
757 struct btrfs_root_item
{
758 struct btrfs_inode_item inode
;
764 __le64 last_snapshot
;
767 struct btrfs_disk_key drop_progress
;
772 * The following fields appear after subvol_uuids+subvol_times
777 * This generation number is used to test if the new fields are valid
778 * and up to date while reading the root item. Everytime the root item
779 * is written out, the "generation" field is copied into this field. If
780 * anyone ever mounted the fs with an older kernel, we will have
781 * mismatching generation values here and thus must invalidate the
782 * new fields. See btrfs_update_root and btrfs_find_last_root for
784 * the offset of generation_v2 is also used as the start for the memset
785 * when invalidating the fields.
787 __le64 generation_v2
;
788 u8 uuid
[BTRFS_UUID_SIZE
];
789 u8 parent_uuid
[BTRFS_UUID_SIZE
];
790 u8 received_uuid
[BTRFS_UUID_SIZE
];
791 __le64 ctransid
; /* updated when an inode changes */
792 __le64 otransid
; /* trans when created */
793 __le64 stransid
; /* trans when sent. non-zero for received subvol */
794 __le64 rtransid
; /* trans when received. non-zero for received subvol */
795 struct btrfs_timespec ctime
;
796 struct btrfs_timespec otime
;
797 struct btrfs_timespec stime
;
798 struct btrfs_timespec rtime
;
799 __le64 reserved
[8]; /* for future */
800 } __attribute__ ((__packed__
));
803 * this is used for both forward and backward root refs
805 struct btrfs_root_ref
{
809 } __attribute__ ((__packed__
));
811 struct btrfs_disk_balance_args
{
813 * profiles to operate on, single is denoted by
814 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
824 /* devid subset filter [pstart..pend) */
828 /* btrfs virtual address space subset filter [vstart..vend) */
833 * profile to convert to, single is denoted by
834 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
838 /* BTRFS_BALANCE_ARGS_* */
842 } __attribute__ ((__packed__
));
845 * store balance parameters to disk so that balance can be properly
846 * resumed after crash or unmount
848 struct btrfs_balance_item
{
849 /* BTRFS_BALANCE_* */
852 struct btrfs_disk_balance_args data
;
853 struct btrfs_disk_balance_args meta
;
854 struct btrfs_disk_balance_args sys
;
857 } __attribute__ ((__packed__
));
859 #define BTRFS_FILE_EXTENT_INLINE 0
860 #define BTRFS_FILE_EXTENT_REG 1
861 #define BTRFS_FILE_EXTENT_PREALLOC 2
863 struct btrfs_file_extent_item
{
865 * transaction id that created this extent
869 * max number of bytes to hold this extent in ram
870 * when we split a compressed extent we can't know how big
871 * each of the resulting pieces will be. So, this is
872 * an upper limit on the size of the extent in ram instead of
878 * 32 bits for the various ways we might encode the data,
879 * including compression and encryption. If any of these
880 * are set to something a given disk format doesn't understand
881 * it is treated like an incompat flag for reading and writing,
886 __le16 other_encoding
; /* spare for later use */
888 /* are we inline data or a real extent? */
892 * disk space consumed by the extent, checksum blocks are included
896 __le64 disk_num_bytes
;
898 * the logical offset in file blocks (no csums)
899 * this extent record is for. This allows a file extent to point
900 * into the middle of an existing extent on disk, sharing it
901 * between two snapshots (useful if some bytes in the middle of the
902 * extent have changed
906 * the logical number of file blocks (no csums included). This
907 * always reflects the size uncompressed and without encoding.
911 } __attribute__ ((__packed__
));
913 struct btrfs_csum_item
{
915 } __attribute__ ((__packed__
));
917 struct btrfs_dev_stats_item
{
919 * grow this item struct at the end for future enhancements and keep
920 * the existing values unchanged
922 __le64 values
[BTRFS_DEV_STAT_VALUES_MAX
];
923 } __attribute__ ((__packed__
));
925 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
926 #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
927 #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
928 #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
929 #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
930 #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
931 #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
933 struct btrfs_dev_replace
{
934 u64 replace_state
; /* see #define above */
935 u64 time_started
; /* seconds since 1-Jan-1970 */
936 u64 time_stopped
; /* seconds since 1-Jan-1970 */
937 atomic64_t num_write_errors
;
938 atomic64_t num_uncorrectable_read_errors
;
941 u64 committed_cursor_left
;
942 u64 cursor_left_last_write_of_item
;
945 u64 cont_reading_from_srcdev_mode
; /* see #define above */
948 int item_needs_writeback
;
949 struct btrfs_device
*srcdev
;
950 struct btrfs_device
*tgtdev
;
953 atomic_t nesting_level
;
954 struct mutex lock_finishing_cancel_unmount
;
955 struct mutex lock_management_lock
;
958 struct btrfs_scrub_progress scrub_progress
;
961 struct btrfs_dev_replace_item
{
963 * grow this item struct at the end for future enhancements and keep
964 * the existing values unchanged
969 __le64 cont_reading_from_srcdev_mode
;
971 __le64 replace_state
;
974 __le64 num_write_errors
;
975 __le64 num_uncorrectable_read_errors
;
976 } __attribute__ ((__packed__
));
978 /* different types of block groups (and chunks) */
979 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
980 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
981 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
982 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
983 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
984 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
985 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
986 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
987 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
988 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
990 enum btrfs_raid_types
{
1001 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1002 BTRFS_BLOCK_GROUP_SYSTEM | \
1003 BTRFS_BLOCK_GROUP_METADATA)
1005 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1006 BTRFS_BLOCK_GROUP_RAID1 | \
1007 BTRFS_BLOCK_GROUP_RAID5 | \
1008 BTRFS_BLOCK_GROUP_RAID6 | \
1009 BTRFS_BLOCK_GROUP_DUP | \
1010 BTRFS_BLOCK_GROUP_RAID10)
1012 * We need a bit for restriper to be able to tell when chunks of type
1013 * SINGLE are available. This "extended" profile format is used in
1014 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1015 * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1016 * to avoid remappings between two formats in future.
1018 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1020 #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1021 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1023 static inline u64
chunk_to_extended(u64 flags
)
1025 if ((flags
& BTRFS_BLOCK_GROUP_PROFILE_MASK
) == 0)
1026 flags
|= BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1030 static inline u64
extended_to_chunk(u64 flags
)
1032 return flags
& ~BTRFS_AVAIL_ALLOC_BIT_SINGLE
;
1035 struct btrfs_block_group_item
{
1037 __le64 chunk_objectid
;
1039 } __attribute__ ((__packed__
));
1042 * is subvolume quota turned on?
1044 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1046 * RESCAN is set during the initialization phase
1048 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1050 * Some qgroup entries are known to be out of date,
1051 * either because the configuration has changed in a way that
1052 * makes a rescan necessary, or because the fs has been mounted
1053 * with a non-qgroup-aware version.
1054 * Turning qouta off and on again makes it inconsistent, too.
1056 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1058 #define BTRFS_QGROUP_STATUS_VERSION 1
1060 struct btrfs_qgroup_status_item
{
1063 * the generation is updated during every commit. As older
1064 * versions of btrfs are not aware of qgroups, it will be
1065 * possible to detect inconsistencies by checking the
1066 * generation on mount time
1070 /* flag definitions see above */
1074 * only used during scanning to record the progress
1075 * of the scan. It contains a logical address
1078 } __attribute__ ((__packed__
));
1080 struct btrfs_qgroup_info_item
{
1086 } __attribute__ ((__packed__
));
1088 /* flags definition for qgroup limits */
1089 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1090 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1091 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1092 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1093 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1094 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1096 struct btrfs_qgroup_limit_item
{
1098 * only updated when any of the other values change
1105 } __attribute__ ((__packed__
));
1107 struct btrfs_space_info
{
1110 u64 total_bytes
; /* total bytes in the space,
1111 this doesn't take mirrors into account */
1112 u64 bytes_used
; /* total bytes used,
1113 this doesn't take mirrors into account */
1114 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
1115 transaction finishes */
1116 u64 bytes_reserved
; /* total bytes the allocator has reserved for
1117 current allocations */
1118 u64 bytes_readonly
; /* total bytes that are read only */
1120 u64 bytes_may_use
; /* number of bytes that may be used for
1121 delalloc/allocations */
1122 u64 disk_used
; /* total bytes used on disk */
1123 u64 disk_total
; /* total bytes on disk, takes mirrors into
1127 * bytes_pinned is kept in line with what is actually pinned, as in
1128 * we've called update_block_group and dropped the bytes_used counter
1129 * and increased the bytes_pinned counter. However this means that
1130 * bytes_pinned does not reflect the bytes that will be pinned once the
1131 * delayed refs are flushed, so this counter is inc'ed everytime we call
1132 * btrfs_free_extent so it is a realtime count of what will be freed
1133 * once the transaction is committed. It will be zero'ed everytime the
1134 * transaction commits.
1136 struct percpu_counter total_bytes_pinned
;
1138 unsigned int full
:1; /* indicates that we cannot allocate any more
1139 chunks for this space */
1140 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
1142 unsigned int flush
:1; /* set if we are trying to make space */
1144 unsigned int force_alloc
; /* set if we need to force a chunk
1145 alloc for this space */
1147 struct list_head list
;
1149 /* for block groups in our same type */
1150 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
1152 struct rw_semaphore groups_sem
;
1153 wait_queue_head_t wait
;
1156 #define BTRFS_BLOCK_RSV_GLOBAL 1
1157 #define BTRFS_BLOCK_RSV_DELALLOC 2
1158 #define BTRFS_BLOCK_RSV_TRANS 3
1159 #define BTRFS_BLOCK_RSV_CHUNK 4
1160 #define BTRFS_BLOCK_RSV_DELOPS 5
1161 #define BTRFS_BLOCK_RSV_EMPTY 6
1162 #define BTRFS_BLOCK_RSV_TEMP 7
1164 struct btrfs_block_rsv
{
1167 struct btrfs_space_info
*space_info
;
1169 unsigned short full
;
1170 unsigned short type
;
1171 unsigned short failfast
;
1175 * free clusters are used to claim free space in relatively large chunks,
1176 * allowing us to do less seeky writes. They are used for all metadata
1177 * allocations and data allocations in ssd mode.
1179 struct btrfs_free_cluster
{
1181 spinlock_t refill_lock
;
1182 struct rb_root root
;
1184 /* largest extent in this cluster */
1187 /* first extent starting offset */
1190 struct btrfs_block_group_cache
*block_group
;
1192 * when a cluster is allocated from a block group, we put the
1193 * cluster onto a list in the block group so that it can
1194 * be freed before the block group is freed.
1196 struct list_head block_group_list
;
1199 enum btrfs_caching_type
{
1201 BTRFS_CACHE_STARTED
= 1,
1202 BTRFS_CACHE_FAST
= 2,
1203 BTRFS_CACHE_FINISHED
= 3,
1204 BTRFS_CACHE_ERROR
= 4,
1207 enum btrfs_disk_cache_state
{
1208 BTRFS_DC_WRITTEN
= 0,
1212 BTRFS_DC_NEED_WRITE
= 4,
1215 struct btrfs_caching_control
{
1216 struct list_head list
;
1218 wait_queue_head_t wait
;
1219 struct btrfs_work work
;
1220 struct btrfs_block_group_cache
*block_group
;
1225 struct btrfs_block_group_cache
{
1226 struct btrfs_key key
;
1227 struct btrfs_block_group_item item
;
1228 struct btrfs_fs_info
*fs_info
;
1229 struct inode
*inode
;
1236 u64 cache_generation
;
1238 /* for raid56, this is a full stripe, without parity */
1239 unsigned long full_stripe_len
;
1242 unsigned int dirty
:1;
1243 unsigned int iref
:1;
1245 int disk_cache_state
;
1247 /* cache tracking stuff */
1249 struct btrfs_caching_control
*caching_ctl
;
1250 u64 last_byte_to_unpin
;
1252 struct btrfs_space_info
*space_info
;
1254 /* free space cache stuff */
1255 struct btrfs_free_space_ctl
*free_space_ctl
;
1257 /* block group cache stuff */
1258 struct rb_node cache_node
;
1260 /* for block groups in the same raid type */
1261 struct list_head list
;
1266 /* List of struct btrfs_free_clusters for this block group.
1267 * Today it will only have one thing on it, but that may change
1269 struct list_head cluster_list
;
1271 /* For delayed block group creation */
1272 struct list_head new_bg_list
;
1275 /* delayed seq elem */
1277 struct list_head list
;
1281 enum btrfs_orphan_cleanup_state
{
1282 ORPHAN_CLEANUP_STARTED
= 1,
1283 ORPHAN_CLEANUP_DONE
= 2,
1286 /* used by the raid56 code to lock stripes for read/modify/write */
1287 struct btrfs_stripe_hash
{
1288 struct list_head hash_list
;
1289 wait_queue_head_t wait
;
1293 /* used by the raid56 code to lock stripes for read/modify/write */
1294 struct btrfs_stripe_hash_table
{
1295 struct list_head stripe_cache
;
1296 spinlock_t cache_lock
;
1298 struct btrfs_stripe_hash table
[];
1301 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1304 struct reloc_control
;
1305 struct btrfs_device
;
1306 struct btrfs_fs_devices
;
1307 struct btrfs_balance_control
;
1308 struct btrfs_delayed_root
;
1309 struct btrfs_fs_info
{
1310 u8 fsid
[BTRFS_FSID_SIZE
];
1311 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
1312 struct btrfs_root
*extent_root
;
1313 struct btrfs_root
*tree_root
;
1314 struct btrfs_root
*chunk_root
;
1315 struct btrfs_root
*dev_root
;
1316 struct btrfs_root
*fs_root
;
1317 struct btrfs_root
*csum_root
;
1318 struct btrfs_root
*quota_root
;
1319 struct btrfs_root
*uuid_root
;
1321 /* the log root tree is a directory of all the other log roots */
1322 struct btrfs_root
*log_root_tree
;
1324 spinlock_t fs_roots_radix_lock
;
1325 struct radix_tree_root fs_roots_radix
;
1327 /* block group cache stuff */
1328 spinlock_t block_group_cache_lock
;
1329 u64 first_logical_byte
;
1330 struct rb_root block_group_cache_tree
;
1332 /* keep track of unallocated space */
1333 spinlock_t free_chunk_lock
;
1334 u64 free_chunk_space
;
1336 struct extent_io_tree freed_extents
[2];
1337 struct extent_io_tree
*pinned_extents
;
1339 /* logical->physical extent mapping */
1340 struct btrfs_mapping_tree mapping_tree
;
1343 * block reservation for extent, checksum, root tree and
1344 * delayed dir index item
1346 struct btrfs_block_rsv global_block_rsv
;
1347 /* block reservation for delay allocation */
1348 struct btrfs_block_rsv delalloc_block_rsv
;
1349 /* block reservation for metadata operations */
1350 struct btrfs_block_rsv trans_block_rsv
;
1351 /* block reservation for chunk tree */
1352 struct btrfs_block_rsv chunk_block_rsv
;
1353 /* block reservation for delayed operations */
1354 struct btrfs_block_rsv delayed_block_rsv
;
1356 struct btrfs_block_rsv empty_block_rsv
;
1359 u64 last_trans_committed
;
1362 * this is updated to the current trans every time a full commit
1363 * is required instead of the faster short fsync log commits
1365 u64 last_trans_log_full_commit
;
1366 unsigned long mount_opt
;
1367 unsigned long compress_type
:4;
1368 int commit_interval
;
1370 * It is a suggestive number, the read side is safe even it gets a
1371 * wrong number because we will write out the data into a regular
1372 * extent. The write side(mount/remount) is under ->s_umount lock,
1373 * so it is also safe.
1377 * Protected by ->chunk_mutex and sb->s_umount.
1379 * The reason that we use two lock to protect it is because only
1380 * remount and mount operations can change it and these two operations
1381 * are under sb->s_umount, but the read side (chunk allocation) can not
1382 * acquire sb->s_umount or the deadlock would happen. So we use two
1383 * locks to protect it. On the write side, we must acquire two locks,
1384 * and on the read side, we just need acquire one of them.
1387 struct btrfs_transaction
*running_transaction
;
1388 wait_queue_head_t transaction_throttle
;
1389 wait_queue_head_t transaction_wait
;
1390 wait_queue_head_t transaction_blocked_wait
;
1391 wait_queue_head_t async_submit_wait
;
1394 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1395 * when they are updated.
1397 * Because we do not clear the flags for ever, so we needn't use
1398 * the lock on the read side.
1400 * We also needn't use the lock when we mount the fs, because
1401 * there is no other task which will update the flag.
1403 spinlock_t super_lock
;
1404 struct btrfs_super_block
*super_copy
;
1405 struct btrfs_super_block
*super_for_commit
;
1406 struct block_device
*__bdev
;
1407 struct super_block
*sb
;
1408 struct inode
*btree_inode
;
1409 struct backing_dev_info bdi
;
1410 struct mutex tree_log_mutex
;
1411 struct mutex transaction_kthread_mutex
;
1412 struct mutex cleaner_mutex
;
1413 struct mutex chunk_mutex
;
1414 struct mutex volume_mutex
;
1416 /* this is used during read/modify/write to make sure
1417 * no two ios are trying to mod the same stripe at the same
1420 struct btrfs_stripe_hash_table
*stripe_hash_table
;
1423 * this protects the ordered operations list only while we are
1424 * processing all of the entries on it. This way we make
1425 * sure the commit code doesn't find the list temporarily empty
1426 * because another function happens to be doing non-waiting preflush
1427 * before jumping into the main commit.
1429 struct mutex ordered_operations_mutex
;
1432 * Same as ordered_operations_mutex except this is for ordered extents
1433 * and not the operations.
1435 struct mutex ordered_extent_flush_mutex
;
1437 struct rw_semaphore extent_commit_sem
;
1439 struct rw_semaphore cleanup_work_sem
;
1441 struct rw_semaphore subvol_sem
;
1442 struct srcu_struct subvol_srcu
;
1444 spinlock_t trans_lock
;
1446 * the reloc mutex goes with the trans lock, it is taken
1447 * during commit to protect us from the relocation code
1449 struct mutex reloc_mutex
;
1451 struct list_head trans_list
;
1452 struct list_head dead_roots
;
1453 struct list_head caching_block_groups
;
1455 spinlock_t delayed_iput_lock
;
1456 struct list_head delayed_iputs
;
1458 /* this protects tree_mod_seq_list */
1459 spinlock_t tree_mod_seq_lock
;
1460 atomic64_t tree_mod_seq
;
1461 struct list_head tree_mod_seq_list
;
1462 struct seq_list tree_mod_seq_elem
;
1464 /* this protects tree_mod_log */
1465 rwlock_t tree_mod_log_lock
;
1466 struct rb_root tree_mod_log
;
1468 atomic_t nr_async_submits
;
1469 atomic_t async_submit_draining
;
1470 atomic_t nr_async_bios
;
1471 atomic_t async_delalloc_pages
;
1472 atomic_t open_ioctl_trans
;
1475 * this is used to protect the following list -- ordered_roots.
1477 spinlock_t ordered_root_lock
;
1480 * all fs/file tree roots in which there are data=ordered extents
1481 * pending writeback are added into this list.
1483 * these can span multiple transactions and basically include
1484 * every dirty data page that isn't from nodatacow
1486 struct list_head ordered_roots
;
1488 spinlock_t delalloc_root_lock
;
1489 /* all fs/file tree roots that have delalloc inodes. */
1490 struct list_head delalloc_roots
;
1493 * there is a pool of worker threads for checksumming during writes
1494 * and a pool for checksumming after reads. This is because readers
1495 * can run with FS locks held, and the writers may be waiting for
1496 * those locks. We don't want ordering in the pending list to cause
1497 * deadlocks, and so the two are serviced separately.
1499 * A third pool does submit_bio to avoid deadlocking with the other
1502 struct btrfs_workers generic_worker
;
1503 struct btrfs_workers workers
;
1504 struct btrfs_workers delalloc_workers
;
1505 struct btrfs_workers flush_workers
;
1506 struct btrfs_workers endio_workers
;
1507 struct btrfs_workers endio_meta_workers
;
1508 struct btrfs_workers endio_raid56_workers
;
1509 struct btrfs_workers rmw_workers
;
1510 struct btrfs_workers endio_meta_write_workers
;
1511 struct btrfs_workers endio_write_workers
;
1512 struct btrfs_workers endio_freespace_worker
;
1513 struct btrfs_workers submit_workers
;
1514 struct btrfs_workers caching_workers
;
1515 struct btrfs_workers readahead_workers
;
1518 * fixup workers take dirty pages that didn't properly go through
1519 * the cow mechanism and make them safe to write. It happens
1520 * for the sys_munmap function call path
1522 struct btrfs_workers fixup_workers
;
1523 struct btrfs_workers delayed_workers
;
1524 struct task_struct
*transaction_kthread
;
1525 struct task_struct
*cleaner_kthread
;
1526 int thread_pool_size
;
1528 struct kobject super_kobj
;
1529 struct completion kobj_unregister
;
1532 int log_root_recovering
;
1536 /* used to keep from writing metadata until there is a nice batch */
1537 struct percpu_counter dirty_metadata_bytes
;
1538 struct percpu_counter delalloc_bytes
;
1539 s32 dirty_metadata_batch
;
1542 struct list_head dirty_cowonly_roots
;
1544 struct btrfs_fs_devices
*fs_devices
;
1547 * the space_info list is almost entirely read only. It only changes
1548 * when we add a new raid type to the FS, and that happens
1549 * very rarely. RCU is used to protect it.
1551 struct list_head space_info
;
1553 struct btrfs_space_info
*data_sinfo
;
1555 struct reloc_control
*reloc_ctl
;
1557 /* data_alloc_cluster is only used in ssd mode */
1558 struct btrfs_free_cluster data_alloc_cluster
;
1560 /* all metadata allocations go through this cluster */
1561 struct btrfs_free_cluster meta_alloc_cluster
;
1563 /* auto defrag inodes go here */
1564 spinlock_t defrag_inodes_lock
;
1565 struct rb_root defrag_inodes
;
1566 atomic_t defrag_running
;
1568 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1569 seqlock_t profiles_lock
;
1571 * these three are in extended format (availability of single
1572 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1573 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1575 u64 avail_data_alloc_bits
;
1576 u64 avail_metadata_alloc_bits
;
1577 u64 avail_system_alloc_bits
;
1579 /* restriper state */
1580 spinlock_t balance_lock
;
1581 struct mutex balance_mutex
;
1582 atomic_t balance_running
;
1583 atomic_t balance_pause_req
;
1584 atomic_t balance_cancel_req
;
1585 struct btrfs_balance_control
*balance_ctl
;
1586 wait_queue_head_t balance_wait_q
;
1588 unsigned data_chunk_allocations
;
1589 unsigned metadata_ratio
;
1593 /* private scrub information */
1594 struct mutex scrub_lock
;
1595 atomic_t scrubs_running
;
1596 atomic_t scrub_pause_req
;
1597 atomic_t scrubs_paused
;
1598 atomic_t scrub_cancel_req
;
1599 wait_queue_head_t scrub_pause_wait
;
1600 int scrub_workers_refcnt
;
1601 struct btrfs_workers scrub_workers
;
1602 struct btrfs_workers scrub_wr_completion_workers
;
1603 struct btrfs_workers scrub_nocow_workers
;
1605 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1606 u32 check_integrity_print_mask
;
1611 unsigned int quota_enabled
:1;
1614 * quota_enabled only changes state after a commit. This holds the
1617 unsigned int pending_quota_state
:1;
1619 /* is qgroup tracking in a consistent state? */
1622 /* holds configuration and tracking. Protected by qgroup_lock */
1623 struct rb_root qgroup_tree
;
1624 spinlock_t qgroup_lock
;
1627 * used to avoid frequently calling ulist_alloc()/ulist_free()
1628 * when doing qgroup accounting, it must be protected by qgroup_lock.
1630 struct ulist
*qgroup_ulist
;
1632 /* protect user change for quota operations */
1633 struct mutex qgroup_ioctl_lock
;
1635 /* list of dirty qgroups to be written at next commit */
1636 struct list_head dirty_qgroups
;
1638 /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1641 /* qgroup rescan items */
1642 struct mutex qgroup_rescan_lock
; /* protects the progress item */
1643 struct btrfs_key qgroup_rescan_progress
;
1644 struct btrfs_workers qgroup_rescan_workers
;
1645 struct completion qgroup_rescan_completion
;
1646 struct btrfs_work qgroup_rescan_work
;
1648 /* filesystem state */
1649 unsigned long fs_state
;
1651 struct btrfs_delayed_root
*delayed_root
;
1653 /* readahead tree */
1654 spinlock_t reada_lock
;
1655 struct radix_tree_root reada_tree
;
1657 /* next backup root to be overwritten */
1658 int backup_root_index
;
1660 int num_tolerated_disk_barrier_failures
;
1662 /* device replace state */
1663 struct btrfs_dev_replace dev_replace
;
1665 atomic_t mutually_exclusive_operation_running
;
1667 struct semaphore uuid_tree_rescan_sem
;
1668 unsigned int update_uuid_tree_gen
:1;
1672 * in ram representation of the tree. extent_root is used for all allocations
1673 * and for the extent tree extent_root root.
1676 struct extent_buffer
*node
;
1678 struct extent_buffer
*commit_root
;
1679 struct btrfs_root
*log_root
;
1680 struct btrfs_root
*reloc_root
;
1682 struct btrfs_root_item root_item
;
1683 struct btrfs_key root_key
;
1684 struct btrfs_fs_info
*fs_info
;
1685 struct extent_io_tree dirty_log_pages
;
1687 struct kobject root_kobj
;
1688 struct completion kobj_unregister
;
1689 struct mutex objectid_mutex
;
1691 spinlock_t accounting_lock
;
1692 struct btrfs_block_rsv
*block_rsv
;
1694 /* free ino cache stuff */
1695 struct mutex fs_commit_mutex
;
1696 struct btrfs_free_space_ctl
*free_ino_ctl
;
1697 enum btrfs_caching_type cached
;
1698 spinlock_t cache_lock
;
1699 wait_queue_head_t cache_wait
;
1700 struct btrfs_free_space_ctl
*free_ino_pinned
;
1702 struct inode
*cache_inode
;
1704 struct mutex log_mutex
;
1705 wait_queue_head_t log_writer_wait
;
1706 wait_queue_head_t log_commit_wait
[2];
1707 atomic_t log_writers
;
1708 atomic_t log_commit
[2];
1710 unsigned long log_transid
;
1711 unsigned long last_log_commit
;
1712 pid_t log_start_pid
;
1713 bool log_multiple_pids
;
1718 /* data allocations are done in sectorsize units */
1721 /* node allocations are done in nodesize units */
1724 /* leaf allocations are done in leafsize units */
1731 u64 highest_objectid
;
1733 /* btrfs_record_root_in_trans is a multi-step process,
1734 * and it can race with the balancing code. But the
1735 * race is very small, and only the first time the root
1736 * is added to each transaction. So in_trans_setup
1737 * is used to tell us when more checks are required
1739 unsigned long in_trans_setup
;
1743 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1746 u64 defrag_trans_start
;
1747 struct btrfs_key defrag_progress
;
1748 struct btrfs_key defrag_max
;
1752 /* the dirty list is only used by non-reference counted roots */
1753 struct list_head dirty_list
;
1755 struct list_head root_list
;
1757 spinlock_t log_extents_lock
[2];
1758 struct list_head logged_list
[2];
1760 spinlock_t orphan_lock
;
1761 atomic_t orphan_inodes
;
1762 struct btrfs_block_rsv
*orphan_block_rsv
;
1763 int orphan_item_inserted
;
1764 int orphan_cleanup_state
;
1766 spinlock_t inode_lock
;
1767 /* red-black tree that keeps track of in-memory inodes */
1768 struct rb_root inode_tree
;
1771 * radix tree that keeps track of delayed nodes of every inode,
1772 * protected by inode_lock
1774 struct radix_tree_root delayed_nodes_tree
;
1776 * right now this just gets used so that a root has its own devid
1777 * for stat. It may be used for more later
1783 spinlock_t root_item_lock
;
1786 spinlock_t delalloc_lock
;
1788 * all of the inodes that have delalloc bytes. It is possible for
1789 * this list to be empty even when there is still dirty data=ordered
1790 * extents waiting to finish IO.
1792 struct list_head delalloc_inodes
;
1793 struct list_head delalloc_root
;
1794 u64 nr_delalloc_inodes
;
1796 * this is used by the balancing code to wait for all the pending
1799 spinlock_t ordered_extent_lock
;
1802 * all of the data=ordered extents pending writeback
1803 * these can span multiple transactions and basically include
1804 * every dirty data page that isn't from nodatacow
1806 struct list_head ordered_extents
;
1807 struct list_head ordered_root
;
1808 u64 nr_ordered_extents
;
1811 struct btrfs_ioctl_defrag_range_args
{
1812 /* start of the defrag operation */
1815 /* number of bytes to defrag, use (u64)-1 to say all */
1819 * flags for the operation, which can include turning
1820 * on compression for this one defrag
1825 * any extent bigger than this will be considered
1826 * already defragged. Use 0 to take the kernel default
1827 * Use 1 to say every single extent must be rewritten
1829 __u32 extent_thresh
;
1832 * which compression method to use if turning on compression
1833 * for this defrag operation. If unspecified, zlib will
1836 __u32 compress_type
;
1838 /* spare for later */
1844 * inode items have the data typically returned from stat and store other
1845 * info about object characteristics. There is one for every file and dir in
1848 #define BTRFS_INODE_ITEM_KEY 1
1849 #define BTRFS_INODE_REF_KEY 12
1850 #define BTRFS_INODE_EXTREF_KEY 13
1851 #define BTRFS_XATTR_ITEM_KEY 24
1852 #define BTRFS_ORPHAN_ITEM_KEY 48
1853 /* reserve 2-15 close to the inode for later flexibility */
1856 * dir items are the name -> inode pointers in a directory. There is one
1857 * for every name in a directory.
1859 #define BTRFS_DIR_LOG_ITEM_KEY 60
1860 #define BTRFS_DIR_LOG_INDEX_KEY 72
1861 #define BTRFS_DIR_ITEM_KEY 84
1862 #define BTRFS_DIR_INDEX_KEY 96
1864 * extent data is for file data
1866 #define BTRFS_EXTENT_DATA_KEY 108
1869 * extent csums are stored in a separate tree and hold csums for
1870 * an entire extent on disk.
1872 #define BTRFS_EXTENT_CSUM_KEY 128
1875 * root items point to tree roots. They are typically in the root
1876 * tree used by the super block to find all the other trees
1878 #define BTRFS_ROOT_ITEM_KEY 132
1881 * root backrefs tie subvols and snapshots to the directory entries that
1884 #define BTRFS_ROOT_BACKREF_KEY 144
1887 * root refs make a fast index for listing all of the snapshots and
1888 * subvolumes referenced by a given root. They point directly to the
1889 * directory item in the root that references the subvol
1891 #define BTRFS_ROOT_REF_KEY 156
1894 * extent items are in the extent map tree. These record which blocks
1895 * are used, and how many references there are to each block
1897 #define BTRFS_EXTENT_ITEM_KEY 168
1900 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1901 * the length, so we save the level in key->offset instead of the length.
1903 #define BTRFS_METADATA_ITEM_KEY 169
1905 #define BTRFS_TREE_BLOCK_REF_KEY 176
1907 #define BTRFS_EXTENT_DATA_REF_KEY 178
1909 #define BTRFS_EXTENT_REF_V0_KEY 180
1911 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1913 #define BTRFS_SHARED_DATA_REF_KEY 184
1916 * block groups give us hints into the extent allocation trees. Which
1917 * blocks are free etc etc
1919 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1921 #define BTRFS_DEV_EXTENT_KEY 204
1922 #define BTRFS_DEV_ITEM_KEY 216
1923 #define BTRFS_CHUNK_ITEM_KEY 228
1926 * Records the overall state of the qgroups.
1927 * There's only one instance of this key present,
1928 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
1930 #define BTRFS_QGROUP_STATUS_KEY 240
1932 * Records the currently used space of the qgroup.
1933 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
1935 #define BTRFS_QGROUP_INFO_KEY 242
1937 * Contains the user configured limits for the qgroup.
1938 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
1940 #define BTRFS_QGROUP_LIMIT_KEY 244
1942 * Records the child-parent relationship of qgroups. For
1943 * each relation, 2 keys are present:
1944 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
1945 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
1947 #define BTRFS_QGROUP_RELATION_KEY 246
1949 #define BTRFS_BALANCE_ITEM_KEY 248
1952 * Persistantly stores the io stats in the device tree.
1953 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1955 #define BTRFS_DEV_STATS_KEY 249
1958 * Persistantly stores the device replace state in the device tree.
1959 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1961 #define BTRFS_DEV_REPLACE_KEY 250
1964 * Stores items that allow to quickly map UUIDs to something else.
1965 * These items are part of the filesystem UUID tree.
1966 * The key is built like this:
1967 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1969 #if BTRFS_UUID_SIZE != 16
1970 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1972 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1973 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1974 * received subvols */
1977 * string items are for debugging. They just store a short string of
1980 #define BTRFS_STRING_ITEM_KEY 253
1983 * Flags for mount options.
1985 * Note: don't forget to add new options to btrfs_show_options()
1987 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1988 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1989 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1990 #define BTRFS_MOUNT_SSD (1 << 3)
1991 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1992 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1993 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1994 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1995 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1996 #define BTRFS_MOUNT_NOSSD (1 << 9)
1997 #define BTRFS_MOUNT_DISCARD (1 << 10)
1998 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1999 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2000 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2001 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2002 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2003 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2004 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2005 #define BTRFS_MOUNT_RECOVERY (1 << 18)
2006 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2007 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2008 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2009 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2010 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2012 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2014 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2015 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2016 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2017 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2022 #define BTRFS_INODE_NODATASUM (1 << 0)
2023 #define BTRFS_INODE_NODATACOW (1 << 1)
2024 #define BTRFS_INODE_READONLY (1 << 2)
2025 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2026 #define BTRFS_INODE_PREALLOC (1 << 4)
2027 #define BTRFS_INODE_SYNC (1 << 5)
2028 #define BTRFS_INODE_IMMUTABLE (1 << 6)
2029 #define BTRFS_INODE_APPEND (1 << 7)
2030 #define BTRFS_INODE_NODUMP (1 << 8)
2031 #define BTRFS_INODE_NOATIME (1 << 9)
2032 #define BTRFS_INODE_DIRSYNC (1 << 10)
2033 #define BTRFS_INODE_COMPRESS (1 << 11)
2035 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2037 struct btrfs_map_token
{
2038 struct extent_buffer
*eb
;
2040 unsigned long offset
;
2043 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
2045 token
->kaddr
= NULL
;
2048 /* some macros to generate set/get funcs for the struct fields. This
2049 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2052 #define le8_to_cpu(v) (v)
2053 #define cpu_to_le8(v) (v)
2056 #define read_eb_member(eb, ptr, type, member, result) ( \
2057 read_extent_buffer(eb, (char *)(result), \
2058 ((unsigned long)(ptr)) + \
2059 offsetof(type, member), \
2060 sizeof(((type *)0)->member)))
2062 #define write_eb_member(eb, ptr, type, member, result) ( \
2063 write_extent_buffer(eb, (char *)(result), \
2064 ((unsigned long)(ptr)) + \
2065 offsetof(type, member), \
2066 sizeof(((type *)0)->member)))
2068 #define DECLARE_BTRFS_SETGET_BITS(bits) \
2069 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2070 unsigned long off, \
2071 struct btrfs_map_token *token); \
2072 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2073 unsigned long off, u##bits val, \
2074 struct btrfs_map_token *token); \
2075 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2076 unsigned long off) \
2078 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2080 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2081 unsigned long off, u##bits val) \
2083 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2086 DECLARE_BTRFS_SETGET_BITS(8)
2087 DECLARE_BTRFS_SETGET_BITS(16)
2088 DECLARE_BTRFS_SETGET_BITS(32)
2089 DECLARE_BTRFS_SETGET_BITS(64)
2091 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2092 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2094 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2095 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2097 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2100 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2101 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2103 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2104 struct btrfs_map_token *token) \
2106 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2107 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2109 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2110 type *s, u##bits val, \
2111 struct btrfs_map_token *token) \
2113 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2114 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2117 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2118 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2120 type *p = page_address(eb->pages[0]); \
2121 u##bits res = le##bits##_to_cpu(p->member); \
2124 static inline void btrfs_set_##name(struct extent_buffer *eb, \
2127 type *p = page_address(eb->pages[0]); \
2128 p->member = cpu_to_le##bits(val); \
2131 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2132 static inline u##bits btrfs_##name(type *s) \
2134 return le##bits##_to_cpu(s->member); \
2136 static inline void btrfs_set_##name(type *s, u##bits val) \
2138 s->member = cpu_to_le##bits(val); \
2141 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
2142 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
2143 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
2144 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
2145 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
2146 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
2148 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
2149 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
2150 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
2151 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
2152 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
2153 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
2155 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
2156 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
2158 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
2160 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
2162 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
2164 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
2166 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
2167 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
2169 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
2171 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
2173 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
2176 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
2178 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
2181 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
2183 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
2186 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
2187 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
2188 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
2189 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
2190 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
2191 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
2192 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
2193 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
2194 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
2195 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
2196 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
2198 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
2200 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
2203 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
2204 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
2205 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
2207 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
2209 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
2211 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
2213 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
2214 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
2216 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
2218 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
2219 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
2221 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
2224 unsigned long offset
= (unsigned long)c
;
2225 offset
+= offsetof(struct btrfs_chunk
, stripe
);
2226 offset
+= nr
* sizeof(struct btrfs_stripe
);
2227 return (struct btrfs_stripe
*)offset
;
2230 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
2232 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
2235 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
2236 struct btrfs_chunk
*c
, int nr
)
2238 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
2241 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
2242 struct btrfs_chunk
*c
, int nr
)
2244 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
2247 /* struct btrfs_block_group_item */
2248 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
2250 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
2252 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
2253 struct btrfs_block_group_item
, chunk_objectid
, 64);
2255 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
2256 struct btrfs_block_group_item
, chunk_objectid
, 64);
2257 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
2258 struct btrfs_block_group_item
, flags
, 64);
2259 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
2260 struct btrfs_block_group_item
, flags
, 64);
2262 /* struct btrfs_inode_ref */
2263 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
2264 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
2266 /* struct btrfs_inode_extref */
2267 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
2268 parent_objectid
, 64);
2269 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
2271 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
2273 /* struct btrfs_inode_item */
2274 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
2275 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
2276 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
2277 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
2278 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
2279 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
2280 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2281 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
2282 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
2283 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
2284 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2285 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
2286 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
2288 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
2290 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
2292 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
2293 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
2295 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
2297 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
2298 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
2299 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
2300 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
2301 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
2302 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
2304 static inline struct btrfs_timespec
*
2305 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
2307 unsigned long ptr
= (unsigned long)inode_item
;
2308 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
2309 return (struct btrfs_timespec
*)ptr
;
2312 static inline struct btrfs_timespec
*
2313 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
2315 unsigned long ptr
= (unsigned long)inode_item
;
2316 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
2317 return (struct btrfs_timespec
*)ptr
;
2320 static inline struct btrfs_timespec
*
2321 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
2323 unsigned long ptr
= (unsigned long)inode_item
;
2324 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
2325 return (struct btrfs_timespec
*)ptr
;
2328 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
2329 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2330 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
2331 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
2333 /* struct btrfs_dev_extent */
2334 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
2336 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
2337 chunk_objectid
, 64);
2338 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
2340 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
2342 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
2344 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
2345 return (unsigned long)dev
+ ptr
;
2348 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
2349 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
2351 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
2353 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
2356 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
2358 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
2359 struct btrfs_tree_block_info
*item
,
2360 struct btrfs_disk_key
*key
)
2362 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2365 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
2366 struct btrfs_tree_block_info
*item
,
2367 struct btrfs_disk_key
*key
)
2369 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
2372 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
2374 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
2376 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
2378 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
2381 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
2384 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
2386 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
2389 static inline u32
btrfs_extent_inline_ref_size(int type
)
2391 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
2392 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
2393 return sizeof(struct btrfs_extent_inline_ref
);
2394 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
2395 return sizeof(struct btrfs_shared_data_ref
) +
2396 sizeof(struct btrfs_extent_inline_ref
);
2397 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
2398 return sizeof(struct btrfs_extent_data_ref
) +
2399 offsetof(struct btrfs_extent_inline_ref
, offset
);
2404 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
2405 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
2407 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
2408 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
2410 /* struct btrfs_node */
2411 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
2412 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
2413 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
2415 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
2418 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
2421 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2422 sizeof(struct btrfs_key_ptr
) * nr
;
2423 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
2426 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
2430 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2431 sizeof(struct btrfs_key_ptr
) * nr
;
2432 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2435 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
2438 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2439 sizeof(struct btrfs_key_ptr
) * nr
;
2440 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
2443 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
2447 ptr
= offsetof(struct btrfs_node
, ptrs
) +
2448 sizeof(struct btrfs_key_ptr
) * nr
;
2449 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
2452 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
2454 return offsetof(struct btrfs_node
, ptrs
) +
2455 sizeof(struct btrfs_key_ptr
) * nr
;
2458 void btrfs_node_key(struct extent_buffer
*eb
,
2459 struct btrfs_disk_key
*disk_key
, int nr
);
2461 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
2462 struct btrfs_disk_key
*disk_key
, int nr
)
2465 ptr
= btrfs_node_key_ptr_offset(nr
);
2466 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
2467 struct btrfs_key_ptr
, key
, disk_key
);
2470 /* struct btrfs_item */
2471 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
2472 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
2473 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
2474 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
2476 static inline unsigned long btrfs_item_nr_offset(int nr
)
2478 return offsetof(struct btrfs_leaf
, items
) +
2479 sizeof(struct btrfs_item
) * nr
;
2482 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
2484 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
2487 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
2488 struct btrfs_item
*item
)
2490 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
2493 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
2495 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
2498 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
2500 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
2503 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
2505 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
2508 static inline void btrfs_item_key(struct extent_buffer
*eb
,
2509 struct btrfs_disk_key
*disk_key
, int nr
)
2511 struct btrfs_item
*item
= btrfs_item_nr(nr
);
2512 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2515 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
2516 struct btrfs_disk_key
*disk_key
, int nr
)
2518 struct btrfs_item
*item
= btrfs_item_nr(nr
);
2519 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2522 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
2525 * struct btrfs_root_ref
2527 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
2528 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
2529 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
2531 /* struct btrfs_dir_item */
2532 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2533 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2534 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2535 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2536 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
2537 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
2539 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
2541 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
2544 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
2545 struct btrfs_dir_item
*item
,
2546 struct btrfs_disk_key
*key
)
2548 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2551 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2552 struct btrfs_dir_item
*item
,
2553 struct btrfs_disk_key
*key
)
2555 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2558 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2560 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2562 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2565 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
2566 struct btrfs_free_space_header
*h
,
2567 struct btrfs_disk_key
*key
)
2569 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2572 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2573 struct btrfs_free_space_header
*h
,
2574 struct btrfs_disk_key
*key
)
2576 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2579 /* struct btrfs_disk_key */
2580 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2582 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2583 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2585 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2586 struct btrfs_disk_key
*disk
)
2588 cpu
->offset
= le64_to_cpu(disk
->offset
);
2589 cpu
->type
= disk
->type
;
2590 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2593 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2594 struct btrfs_key
*cpu
)
2596 disk
->offset
= cpu_to_le64(cpu
->offset
);
2597 disk
->type
= cpu
->type
;
2598 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2601 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
2602 struct btrfs_key
*key
, int nr
)
2604 struct btrfs_disk_key disk_key
;
2605 btrfs_node_key(eb
, &disk_key
, nr
);
2606 btrfs_disk_key_to_cpu(key
, &disk_key
);
2609 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2610 struct btrfs_key
*key
, int nr
)
2612 struct btrfs_disk_key disk_key
;
2613 btrfs_item_key(eb
, &disk_key
, nr
);
2614 btrfs_disk_key_to_cpu(key
, &disk_key
);
2617 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2618 struct btrfs_dir_item
*item
,
2619 struct btrfs_key
*key
)
2621 struct btrfs_disk_key disk_key
;
2622 btrfs_dir_item_key(eb
, item
, &disk_key
);
2623 btrfs_disk_key_to_cpu(key
, &disk_key
);
2627 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
2632 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2637 /* struct btrfs_header */
2638 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2639 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2641 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2642 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2643 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2644 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2645 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
2647 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
2648 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
2650 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
2652 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2654 return (btrfs_header_flags(eb
) & flag
) == flag
;
2657 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2659 u64 flags
= btrfs_header_flags(eb
);
2660 btrfs_set_header_flags(eb
, flags
| flag
);
2661 return (flags
& flag
) == flag
;
2664 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2666 u64 flags
= btrfs_header_flags(eb
);
2667 btrfs_set_header_flags(eb
, flags
& ~flag
);
2668 return (flags
& flag
) == flag
;
2671 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2673 u64 flags
= btrfs_header_flags(eb
);
2674 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2677 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2680 u64 flags
= btrfs_header_flags(eb
);
2681 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2682 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2683 btrfs_set_header_flags(eb
, flags
);
2686 static inline unsigned long btrfs_header_fsid(void)
2688 return offsetof(struct btrfs_header
, fsid
);
2691 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2693 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
2696 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2698 return btrfs_header_level(eb
) == 0;
2701 /* struct btrfs_root_item */
2702 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2704 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2705 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2706 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2708 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2710 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2711 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2712 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2713 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2714 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2715 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2716 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2717 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2719 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2721 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2723 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2725 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2727 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2730 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2732 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2735 /* struct btrfs_root_backup */
2736 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2738 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2740 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2741 tree_root_level
, 8);
2743 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2745 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2746 chunk_root_gen
, 64);
2747 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2748 chunk_root_level
, 8);
2750 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2752 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2753 extent_root_gen
, 64);
2754 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2755 extent_root_level
, 8);
2757 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2759 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2761 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2764 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2766 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2768 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2771 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2773 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2775 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2776 csum_root_level
, 8);
2777 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2779 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2781 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2784 /* struct btrfs_balance_item */
2785 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2787 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2788 struct btrfs_balance_item
*bi
,
2789 struct btrfs_disk_balance_args
*ba
)
2791 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2794 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2795 struct btrfs_balance_item
*bi
,
2796 struct btrfs_disk_balance_args
*ba
)
2798 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2801 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2802 struct btrfs_balance_item
*bi
,
2803 struct btrfs_disk_balance_args
*ba
)
2805 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2808 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2809 struct btrfs_balance_item
*bi
,
2810 struct btrfs_disk_balance_args
*ba
)
2812 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2815 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2816 struct btrfs_balance_item
*bi
,
2817 struct btrfs_disk_balance_args
*ba
)
2819 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2822 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2823 struct btrfs_balance_item
*bi
,
2824 struct btrfs_disk_balance_args
*ba
)
2826 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2830 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2831 struct btrfs_disk_balance_args
*disk
)
2833 memset(cpu
, 0, sizeof(*cpu
));
2835 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2836 cpu
->usage
= le64_to_cpu(disk
->usage
);
2837 cpu
->devid
= le64_to_cpu(disk
->devid
);
2838 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2839 cpu
->pend
= le64_to_cpu(disk
->pend
);
2840 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2841 cpu
->vend
= le64_to_cpu(disk
->vend
);
2842 cpu
->target
= le64_to_cpu(disk
->target
);
2843 cpu
->flags
= le64_to_cpu(disk
->flags
);
2847 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2848 struct btrfs_balance_args
*cpu
)
2850 memset(disk
, 0, sizeof(*disk
));
2852 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2853 disk
->usage
= cpu_to_le64(cpu
->usage
);
2854 disk
->devid
= cpu_to_le64(cpu
->devid
);
2855 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2856 disk
->pend
= cpu_to_le64(cpu
->pend
);
2857 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2858 disk
->vend
= cpu_to_le64(cpu
->vend
);
2859 disk
->target
= cpu_to_le64(cpu
->target
);
2860 disk
->flags
= cpu_to_le64(cpu
->flags
);
2863 /* struct btrfs_super_block */
2864 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2865 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2866 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2868 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2869 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2870 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2871 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2872 struct btrfs_super_block
, chunk_root_generation
, 64);
2873 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2875 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2877 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2878 chunk_root_level
, 8);
2879 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2881 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2882 log_root_transid
, 64);
2883 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2885 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2887 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2889 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2891 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2893 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
2895 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2897 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2898 root_dir_objectid
, 64);
2899 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2901 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2903 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2904 compat_ro_flags
, 64);
2905 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2906 incompat_flags
, 64);
2907 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2909 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2910 cache_generation
, 64);
2911 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2912 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2913 uuid_tree_generation
, 64);
2915 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2917 u16 t
= btrfs_super_csum_type(s
);
2919 * csum type is validated at mount time
2921 return btrfs_csum_sizes
[t
];
2924 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2926 return offsetof(struct btrfs_leaf
, items
);
2929 /* struct btrfs_file_extent_item */
2930 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2931 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
2932 struct btrfs_file_extent_item
, disk_bytenr
, 64);
2933 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
2934 struct btrfs_file_extent_item
, offset
, 64);
2935 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
2936 struct btrfs_file_extent_item
, generation
, 64);
2937 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
2938 struct btrfs_file_extent_item
, num_bytes
, 64);
2939 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
2940 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
2941 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
2942 struct btrfs_file_extent_item
, compression
, 8);
2944 static inline unsigned long
2945 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2947 unsigned long offset
= (unsigned long)e
;
2948 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2952 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2954 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
2957 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2959 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2961 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2962 disk_num_bytes
, 64);
2963 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2965 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2967 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2969 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2971 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2973 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2974 other_encoding
, 16);
2976 /* this returns the number of file bytes represented by the inline item.
2977 * If an item is compressed, this is the uncompressed size
2979 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2980 struct btrfs_file_extent_item
*e
)
2982 return btrfs_file_extent_ram_bytes(eb
, e
);
2986 * this returns the number of bytes used by the item on disk, minus the
2987 * size of any extent headers. If a file is compressed on disk, this is
2988 * the compressed size
2990 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2991 struct btrfs_item
*e
)
2993 unsigned long offset
;
2994 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
2995 return btrfs_item_size(eb
, e
) - offset
;
2998 /* btrfs_dev_stats_item */
2999 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
3000 struct btrfs_dev_stats_item
*ptr
,
3005 read_extent_buffer(eb
, &val
,
3006 offsetof(struct btrfs_dev_stats_item
, values
) +
3007 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
3012 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
3013 struct btrfs_dev_stats_item
*ptr
,
3016 write_extent_buffer(eb
, &val
,
3017 offsetof(struct btrfs_dev_stats_item
, values
) +
3018 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
3022 /* btrfs_qgroup_status_item */
3023 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
3025 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
3027 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
3029 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
3032 /* btrfs_qgroup_info_item */
3033 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
3035 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
3036 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
3038 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
3039 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
3042 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
3043 struct btrfs_qgroup_info_item
, generation
, 64);
3044 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
3046 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
3047 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
3048 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
3050 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
3051 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
3053 /* btrfs_qgroup_limit_item */
3054 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
3056 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
3058 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
3060 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
3062 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
3065 /* btrfs_dev_replace_item */
3066 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
3067 struct btrfs_dev_replace_item
, src_devid
, 64);
3068 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
3069 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
3071 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
3073 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
3075 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
3077 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
3078 num_write_errors
, 64);
3079 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
3080 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
3082 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
3084 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
3087 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
3088 struct btrfs_dev_replace_item
, src_devid
, 64);
3089 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
3090 struct btrfs_dev_replace_item
,
3091 cont_reading_from_srcdev_mode
, 64);
3092 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
3093 struct btrfs_dev_replace_item
, replace_state
, 64);
3094 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
3095 struct btrfs_dev_replace_item
, time_started
, 64);
3096 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
3097 struct btrfs_dev_replace_item
, time_stopped
, 64);
3098 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
3099 struct btrfs_dev_replace_item
, num_write_errors
, 64);
3100 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
3101 struct btrfs_dev_replace_item
,
3102 num_uncorrectable_read_errors
, 64);
3103 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
3104 struct btrfs_dev_replace_item
, cursor_left
, 64);
3105 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
3106 struct btrfs_dev_replace_item
, cursor_right
, 64);
3108 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
3110 return sb
->s_fs_info
;
3113 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
3116 return root
->leafsize
;
3117 return root
->nodesize
;
3120 /* helper function to cast into the data area of the leaf. */
3121 #define btrfs_item_ptr(leaf, slot, type) \
3122 ((type *)(btrfs_leaf_data(leaf) + \
3123 btrfs_item_offset_nr(leaf, slot)))
3125 #define btrfs_item_ptr_offset(leaf, slot) \
3126 ((unsigned long)(btrfs_leaf_data(leaf) + \
3127 btrfs_item_offset_nr(leaf, slot)))
3129 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
3131 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
3132 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
3135 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
3137 return mapping_gfp_mask(mapping
) & ~__GFP_FS
;
3141 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
3144 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
3149 * Doing a truncate won't result in new nodes or leaves, just what we need for
3152 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
3155 return (root
->leafsize
+ root
->nodesize
* (BTRFS_MAX_LEVEL
- 1)) *
3159 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle
*trans
,
3160 struct btrfs_root
*root
);
3161 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
3162 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
3163 struct btrfs_root
*root
, unsigned long count
);
3164 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
3165 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
3166 struct btrfs_root
*root
, u64 bytenr
,
3167 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
3168 int btrfs_pin_extent(struct btrfs_root
*root
,
3169 u64 bytenr
, u64 num
, int reserved
);
3170 int btrfs_pin_extent_for_log_replay(struct btrfs_root
*root
,
3171 u64 bytenr
, u64 num_bytes
);
3172 int btrfs_exclude_logged_extents(struct btrfs_root
*root
,
3173 struct extent_buffer
*eb
);
3174 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
3175 struct btrfs_root
*root
,
3176 u64 objectid
, u64 offset
, u64 bytenr
);
3177 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
3178 struct btrfs_fs_info
*info
,
3180 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
3181 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
3182 struct btrfs_root
*root
, u32 blocksize
,
3183 u64 parent
, u64 root_objectid
,
3184 struct btrfs_disk_key
*key
, int level
,
3185 u64 hint
, u64 empty_size
);
3186 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
3187 struct btrfs_root
*root
,
3188 struct extent_buffer
*buf
,
3189 u64 parent
, int last_ref
);
3190 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
3191 struct btrfs_root
*root
,
3192 u64 root_objectid
, u64 owner
,
3193 u64 offset
, struct btrfs_key
*ins
);
3194 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
3195 struct btrfs_root
*root
,
3196 u64 root_objectid
, u64 owner
, u64 offset
,
3197 struct btrfs_key
*ins
);
3198 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 num_bytes
,
3199 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
3200 struct btrfs_key
*ins
, int is_data
);
3201 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3202 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
3203 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3204 struct extent_buffer
*buf
, int full_backref
, int for_cow
);
3205 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
3206 struct btrfs_root
*root
,
3207 u64 bytenr
, u64 num_bytes
, u64 flags
,
3208 int level
, int is_data
);
3209 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
3210 struct btrfs_root
*root
,
3211 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
3212 u64 owner
, u64 offset
, int for_cow
);
3214 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
3215 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
3216 u64 start
, u64 len
);
3217 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
3218 struct btrfs_root
*root
);
3219 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
3220 struct btrfs_root
*root
);
3221 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
3222 struct btrfs_root
*root
,
3223 u64 bytenr
, u64 num_bytes
, u64 parent
,
3224 u64 root_objectid
, u64 owner
, u64 offset
, int for_cow
);
3226 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
3227 struct btrfs_root
*root
);
3228 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
3229 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
3230 int btrfs_read_block_groups(struct btrfs_root
*root
);
3231 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
3232 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
3233 struct btrfs_root
*root
, u64 bytes_used
,
3234 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
3236 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
3237 struct btrfs_root
*root
, u64 group_start
);
3238 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
3239 struct btrfs_root
*root
);
3240 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
3241 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
3243 enum btrfs_reserve_flush_enum
{
3244 /* If we are in the transaction, we can't flush anything.*/
3245 BTRFS_RESERVE_NO_FLUSH
,
3247 * Flushing delalloc may cause deadlock somewhere, in this
3248 * case, use FLUSH LIMIT
3250 BTRFS_RESERVE_FLUSH_LIMIT
,
3251 BTRFS_RESERVE_FLUSH_ALL
,
3254 int btrfs_check_data_free_space(struct inode
*inode
, u64 bytes
);
3255 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 bytes
);
3256 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
3257 struct btrfs_root
*root
);
3258 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
3259 struct inode
*inode
);
3260 void btrfs_orphan_release_metadata(struct inode
*inode
);
3261 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
3262 struct btrfs_block_rsv
*rsv
,
3264 u64
*qgroup_reserved
, bool use_global_rsv
);
3265 void btrfs_subvolume_release_metadata(struct btrfs_root
*root
,
3266 struct btrfs_block_rsv
*rsv
,
3267 u64 qgroup_reserved
);
3268 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
3269 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
3270 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 num_bytes
);
3271 void btrfs_delalloc_release_space(struct inode
*inode
, u64 num_bytes
);
3272 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
3273 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
3274 unsigned short type
);
3275 void btrfs_free_block_rsv(struct btrfs_root
*root
,
3276 struct btrfs_block_rsv
*rsv
);
3277 int btrfs_block_rsv_add(struct btrfs_root
*root
,
3278 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
3279 enum btrfs_reserve_flush_enum flush
);
3280 int btrfs_block_rsv_check(struct btrfs_root
*root
,
3281 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
3282 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
3283 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
3284 enum btrfs_reserve_flush_enum flush
);
3285 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
3286 struct btrfs_block_rsv
*dst_rsv
,
3288 int btrfs_cond_migrate_bytes(struct btrfs_fs_info
*fs_info
,
3289 struct btrfs_block_rsv
*dest
, u64 num_bytes
,
3291 void btrfs_block_rsv_release(struct btrfs_root
*root
,
3292 struct btrfs_block_rsv
*block_rsv
,
3294 int btrfs_set_block_group_ro(struct btrfs_root
*root
,
3295 struct btrfs_block_group_cache
*cache
);
3296 void btrfs_set_block_group_rw(struct btrfs_root
*root
,
3297 struct btrfs_block_group_cache
*cache
);
3298 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
3299 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
3300 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
3301 u64 start
, u64 end
);
3302 int btrfs_error_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
3303 u64 num_bytes
, u64
*actual_bytes
);
3304 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
3305 struct btrfs_root
*root
, u64 type
);
3306 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
3308 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
3309 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
3310 struct btrfs_fs_info
*fs_info
);
3311 int __get_raid_index(u64 flags
);
3313 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
3314 int level
, int *slot
);
3315 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
3316 int btrfs_previous_item(struct btrfs_root
*root
,
3317 struct btrfs_path
*path
, u64 min_objectid
,
3319 void btrfs_set_item_key_safe(struct btrfs_root
*root
, struct btrfs_path
*path
,
3320 struct btrfs_key
*new_key
);
3321 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
3322 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
3323 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
3324 struct btrfs_key
*key
, int lowest_level
,
3326 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
3327 struct btrfs_path
*path
,
3329 enum btrfs_compare_tree_result
{
3330 BTRFS_COMPARE_TREE_NEW
,
3331 BTRFS_COMPARE_TREE_DELETED
,
3332 BTRFS_COMPARE_TREE_CHANGED
,
3333 BTRFS_COMPARE_TREE_SAME
,
3335 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
3336 struct btrfs_root
*right_root
,
3337 struct btrfs_path
*left_path
,
3338 struct btrfs_path
*right_path
,
3339 struct btrfs_key
*key
,
3340 enum btrfs_compare_tree_result result
,
3342 int btrfs_compare_trees(struct btrfs_root
*left_root
,
3343 struct btrfs_root
*right_root
,
3344 btrfs_changed_cb_t cb
, void *ctx
);
3345 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
3346 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3347 struct extent_buffer
*parent
, int parent_slot
,
3348 struct extent_buffer
**cow_ret
);
3349 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
3350 struct btrfs_root
*root
,
3351 struct extent_buffer
*buf
,
3352 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
3353 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
3354 struct extent_buffer
*buf
);
3355 void btrfs_extend_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
3357 void btrfs_truncate_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
3358 u32 new_size
, int from_end
);
3359 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
3360 struct btrfs_root
*root
,
3361 struct btrfs_path
*path
,
3362 struct btrfs_key
*new_key
,
3363 unsigned long split_offset
);
3364 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
3365 struct btrfs_root
*root
,
3366 struct btrfs_path
*path
,
3367 struct btrfs_key
*new_key
);
3368 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
3369 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
3371 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
3372 struct btrfs_path
*p
, u64 time_seq
);
3373 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
3374 struct btrfs_key
*key
, struct btrfs_path
*p
,
3375 int find_higher
, int return_any
);
3376 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
3377 struct btrfs_root
*root
, struct extent_buffer
*parent
,
3378 int start_slot
, u64
*last_ret
,
3379 struct btrfs_key
*progress
);
3380 void btrfs_release_path(struct btrfs_path
*p
);
3381 struct btrfs_path
*btrfs_alloc_path(void);
3382 void btrfs_free_path(struct btrfs_path
*p
);
3383 void btrfs_set_path_blocking(struct btrfs_path
*p
);
3384 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
3385 struct extent_buffer
*held
, int held_rw
);
3386 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
3388 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3389 struct btrfs_path
*path
, int slot
, int nr
);
3390 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
3391 struct btrfs_root
*root
,
3392 struct btrfs_path
*path
)
3394 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
3397 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
3398 struct btrfs_key
*cpu_key
, u32
*data_size
,
3399 u32 total_data
, u32 total_size
, int nr
);
3400 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
3401 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
3402 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
3403 struct btrfs_root
*root
,
3404 struct btrfs_path
*path
,
3405 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
3407 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
3408 struct btrfs_root
*root
,
3409 struct btrfs_path
*path
,
3410 struct btrfs_key
*key
,
3413 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
3416 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3417 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3418 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
3420 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
3421 struct btrfs_path
*p
, u64 time_seq
)
3424 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
3425 return btrfs_next_old_leaf(root
, p
, time_seq
);
3428 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
3430 return btrfs_next_old_item(root
, p
, 0);
3432 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
3433 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
3434 struct btrfs_block_rsv
*block_rsv
,
3435 int update_ref
, int for_reloc
);
3436 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
3437 struct btrfs_root
*root
,
3438 struct extent_buffer
*node
,
3439 struct extent_buffer
*parent
);
3440 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
3443 * Get synced with close_ctree()
3446 return fs_info
->closing
;
3450 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3451 * anything except sleeping. This function is used to check the status of
3454 static inline int btrfs_need_cleaner_sleep(struct btrfs_root
*root
)
3456 return (root
->fs_info
->sb
->s_flags
& MS_RDONLY
||
3457 btrfs_fs_closing(root
->fs_info
));
3460 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
3462 kfree(fs_info
->balance_ctl
);
3463 kfree(fs_info
->delayed_root
);
3464 kfree(fs_info
->extent_root
);
3465 kfree(fs_info
->tree_root
);
3466 kfree(fs_info
->chunk_root
);
3467 kfree(fs_info
->dev_root
);
3468 kfree(fs_info
->csum_root
);
3469 kfree(fs_info
->quota_root
);
3470 kfree(fs_info
->uuid_root
);
3471 kfree(fs_info
->super_copy
);
3472 kfree(fs_info
->super_for_commit
);
3476 /* tree mod log functions from ctree.c */
3477 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3478 struct seq_list
*elem
);
3479 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3480 struct seq_list
*elem
);
3481 u64
btrfs_tree_mod_seq_prev(u64 seq
);
3482 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
3485 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
3486 struct btrfs_path
*path
,
3487 u64 root_id
, u64 ref_id
);
3488 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
3489 struct btrfs_root
*tree_root
,
3490 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
3491 const char *name
, int name_len
);
3492 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
3493 struct btrfs_root
*tree_root
,
3494 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
3495 const char *name
, int name_len
);
3496 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3497 struct btrfs_key
*key
);
3498 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
3499 *root
, struct btrfs_key
*key
, struct btrfs_root_item
3501 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
3502 struct btrfs_root
*root
,
3503 struct btrfs_key
*key
,
3504 struct btrfs_root_item
*item
);
3505 int btrfs_find_root(struct btrfs_root
*root
, struct btrfs_key
*search_key
,
3506 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
3507 struct btrfs_key
*root_key
);
3508 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
3509 void btrfs_set_root_node(struct btrfs_root_item
*item
,
3510 struct extent_buffer
*node
);
3511 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
3512 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
3513 struct btrfs_root
*root
);
3516 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
,
3517 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
3519 int btrfs_uuid_tree_rem(struct btrfs_trans_handle
*trans
,
3520 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
3522 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
,
3523 int (*check_func
)(struct btrfs_fs_info
*, u8
*, u8
,
3527 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
3528 const char *name
, int name_len
);
3529 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
3530 struct btrfs_root
*root
, const char *name
,
3531 int name_len
, struct inode
*dir
,
3532 struct btrfs_key
*location
, u8 type
, u64 index
);
3533 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3534 struct btrfs_root
*root
,
3535 struct btrfs_path
*path
, u64 dir
,
3536 const char *name
, int name_len
,
3538 struct btrfs_dir_item
*
3539 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3540 struct btrfs_root
*root
,
3541 struct btrfs_path
*path
, u64 dir
,
3542 u64 objectid
, const char *name
, int name_len
,
3544 struct btrfs_dir_item
*
3545 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3546 struct btrfs_path
*path
, u64 dirid
,
3547 const char *name
, int name_len
);
3548 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3549 struct btrfs_root
*root
,
3550 struct btrfs_path
*path
,
3551 struct btrfs_dir_item
*di
);
3552 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3553 struct btrfs_root
*root
,
3554 struct btrfs_path
*path
, u64 objectid
,
3555 const char *name
, u16 name_len
,
3556 const void *data
, u16 data_len
);
3557 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3558 struct btrfs_root
*root
,
3559 struct btrfs_path
*path
, u64 dir
,
3560 const char *name
, u16 name_len
,
3562 int verify_dir_item(struct btrfs_root
*root
,
3563 struct extent_buffer
*leaf
,
3564 struct btrfs_dir_item
*dir_item
);
3567 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3568 struct btrfs_root
*root
, u64 offset
);
3569 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3570 struct btrfs_root
*root
, u64 offset
);
3571 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3574 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3575 struct btrfs_root
*root
,
3576 const char *name
, int name_len
,
3577 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3578 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3579 struct btrfs_root
*root
,
3580 const char *name
, int name_len
,
3581 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3582 int btrfs_get_inode_ref_index(struct btrfs_trans_handle
*trans
,
3583 struct btrfs_root
*root
,
3584 struct btrfs_path
*path
,
3585 const char *name
, int name_len
,
3586 u64 inode_objectid
, u64 ref_objectid
, int mod
,
3588 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3589 struct btrfs_root
*root
,
3590 struct btrfs_path
*path
, u64 objectid
);
3591 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3592 *root
, struct btrfs_path
*path
,
3593 struct btrfs_key
*location
, int mod
);
3595 struct btrfs_inode_extref
*
3596 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3597 struct btrfs_root
*root
,
3598 struct btrfs_path
*path
,
3599 const char *name
, int name_len
,
3600 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3603 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3604 u64 ref_objectid
, const char *name
,
3606 struct btrfs_inode_extref
**extref_ret
);
3609 struct btrfs_dio_private
;
3610 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3611 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3612 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3613 struct bio
*bio
, u32
*dst
);
3614 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3615 struct btrfs_dio_private
*dip
, struct bio
*bio
,
3616 u64 logical_offset
);
3617 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3618 struct btrfs_root
*root
,
3619 u64 objectid
, u64 pos
,
3620 u64 disk_offset
, u64 disk_num_bytes
,
3621 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3622 u8 compression
, u8 encryption
, u16 other_encoding
);
3623 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3624 struct btrfs_root
*root
,
3625 struct btrfs_path
*path
, u64 objectid
,
3626 u64 bytenr
, int mod
);
3627 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3628 struct btrfs_root
*root
,
3629 struct btrfs_ordered_sum
*sums
);
3630 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3631 struct bio
*bio
, u64 file_start
, int contig
);
3632 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3633 struct list_head
*list
, int search_commit
);
3635 struct btrfs_delalloc_work
{
3636 struct inode
*inode
;
3639 struct completion completion
;
3640 struct list_head list
;
3641 struct btrfs_work work
;
3644 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3645 int wait
, int delay_iput
);
3646 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3648 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3649 size_t pg_offset
, u64 start
, u64 len
,
3651 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
3652 u64
*orig_start
, u64
*orig_block_len
,
3655 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3656 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3657 #define ClearPageChecked ClearPageFsMisc
3658 #define SetPageChecked SetPageFsMisc
3659 #define PageChecked PageFsMisc
3662 /* This forces readahead on a given range of bytes in an inode */
3663 static inline void btrfs_force_ra(struct address_space
*mapping
,
3664 struct file_ra_state
*ra
, struct file
*file
,
3665 pgoff_t offset
, unsigned long req_size
)
3667 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3670 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3671 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3672 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3673 struct btrfs_root
*root
,
3674 struct inode
*dir
, struct inode
*inode
,
3675 const char *name
, int name_len
);
3676 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3677 struct inode
*parent_inode
, struct inode
*inode
,
3678 const char *name
, int name_len
, int add_backref
, u64 index
);
3679 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3680 struct btrfs_root
*root
,
3681 struct inode
*dir
, u64 objectid
,
3682 const char *name
, int name_len
);
3683 int btrfs_truncate_page(struct inode
*inode
, loff_t from
, loff_t len
,
3685 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3686 struct btrfs_root
*root
,
3687 struct inode
*inode
, u64 new_size
,
3690 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3691 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, int delay_iput
);
3692 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3693 struct extent_state
**cached_state
);
3694 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3695 struct btrfs_root
*new_root
, u64 new_dirid
);
3696 int btrfs_merge_bio_hook(int rw
, struct page
*page
, unsigned long offset
,
3697 size_t size
, struct bio
*bio
,
3698 unsigned long bio_flags
);
3699 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3700 int btrfs_readpage(struct file
*file
, struct page
*page
);
3701 void btrfs_evict_inode(struct inode
*inode
);
3702 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3703 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3704 void btrfs_destroy_inode(struct inode
*inode
);
3705 int btrfs_drop_inode(struct inode
*inode
);
3706 int btrfs_init_cachep(void);
3707 void btrfs_destroy_cachep(void);
3708 long btrfs_ioctl_trans_end(struct file
*file
);
3709 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3710 struct btrfs_root
*root
, int *was_new
);
3711 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3712 size_t pg_offset
, u64 start
, u64 end
,
3714 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3715 struct btrfs_root
*root
,
3716 struct inode
*inode
);
3717 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3718 struct btrfs_root
*root
, struct inode
*inode
);
3719 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3720 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3721 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3722 struct btrfs_root
*root
);
3723 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3724 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3725 void btrfs_add_delayed_iput(struct inode
*inode
);
3726 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3727 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3728 u64 start
, u64 num_bytes
, u64 min_size
,
3729 loff_t actual_len
, u64
*alloc_hint
);
3730 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3731 struct btrfs_trans_handle
*trans
, int mode
,
3732 u64 start
, u64 num_bytes
, u64 min_size
,
3733 loff_t actual_len
, u64
*alloc_hint
);
3734 extern const struct dentry_operations btrfs_dentry_operations
;
3737 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3738 void btrfs_update_iflags(struct inode
*inode
);
3739 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3740 int btrfs_is_empty_uuid(u8
*uuid
);
3741 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3742 struct btrfs_ioctl_defrag_range_args
*range
,
3743 u64 newer_than
, unsigned long max_pages
);
3744 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3745 struct btrfs_ioctl_space_info
*space
);
3746 void update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
, int lock
,
3747 struct btrfs_ioctl_balance_args
*bargs
);
3751 int btrfs_auto_defrag_init(void);
3752 void btrfs_auto_defrag_exit(void);
3753 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3754 struct inode
*inode
);
3755 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3756 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3757 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3758 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3760 extern const struct file_operations btrfs_file_operations
;
3761 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3762 struct btrfs_root
*root
, struct inode
*inode
,
3763 struct btrfs_path
*path
, u64 start
, u64 end
,
3764 u64
*drop_end
, int drop_cache
);
3765 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3766 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3767 u64 end
, int drop_cache
);
3768 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3769 struct inode
*inode
, u64 start
, u64 end
);
3770 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3771 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3772 struct page
**pages
, size_t num_pages
,
3773 loff_t pos
, size_t write_bytes
,
3774 struct extent_state
**cached
);
3777 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3778 struct btrfs_root
*root
);
3781 int btrfs_init_sysfs(void);
3782 void btrfs_exit_sysfs(void);
3783 int btrfs_sysfs_add_one(struct btrfs_fs_info
*fs_info
);
3784 void btrfs_sysfs_remove_one(struct btrfs_fs_info
*fs_info
);
3787 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3790 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
3791 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3793 #ifdef CONFIG_PRINTK
3795 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3797 static inline __printf(2, 3)
3798 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3803 #define btrfs_emerg(fs_info, fmt, args...) \
3804 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3805 #define btrfs_alert(fs_info, fmt, args...) \
3806 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3807 #define btrfs_crit(fs_info, fmt, args...) \
3808 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3809 #define btrfs_err(fs_info, fmt, args...) \
3810 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3811 #define btrfs_warn(fs_info, fmt, args...) \
3812 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3813 #define btrfs_notice(fs_info, fmt, args...) \
3814 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3815 #define btrfs_info(fs_info, fmt, args...) \
3816 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3817 #define btrfs_debug(fs_info, fmt, args...) \
3818 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3820 #ifdef CONFIG_BTRFS_ASSERT
3822 static inline void assfail(char *expr
, char *file
, int line
)
3824 printk(KERN_ERR
"BTRFS assertion failed: %s, file: %s, line: %d",
3829 #define ASSERT(expr) \
3830 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3832 #define ASSERT(expr) ((void)0)
3835 #define btrfs_assert()
3837 void __btrfs_std_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3838 unsigned int line
, int errno
, const char *fmt
, ...);
3841 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3842 struct btrfs_root
*root
, const char *function
,
3843 unsigned int line
, int errno
);
3845 #define btrfs_set_fs_incompat(__fs_info, opt) \
3846 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3848 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3851 struct btrfs_super_block
*disk_super
;
3854 disk_super
= fs_info
->super_copy
;
3855 features
= btrfs_super_incompat_flags(disk_super
);
3856 if (!(features
& flag
)) {
3857 spin_lock(&fs_info
->super_lock
);
3858 features
= btrfs_super_incompat_flags(disk_super
);
3859 if (!(features
& flag
)) {
3861 btrfs_set_super_incompat_flags(disk_super
, features
);
3862 printk(KERN_INFO
"btrfs: setting %llu feature flag\n",
3865 spin_unlock(&fs_info
->super_lock
);
3869 #define btrfs_fs_incompat(fs_info, opt) \
3870 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3872 static inline int __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
3874 struct btrfs_super_block
*disk_super
;
3875 disk_super
= fs_info
->super_copy
;
3876 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
3880 * Call btrfs_abort_transaction as early as possible when an error condition is
3881 * detected, that way the exact line number is reported.
3884 #define btrfs_abort_transaction(trans, root, errno) \
3886 __btrfs_abort_transaction(trans, root, __func__, \
3890 #define btrfs_std_error(fs_info, errno) \
3893 __btrfs_std_error((fs_info), __func__, \
3894 __LINE__, (errno), NULL); \
3897 #define btrfs_error(fs_info, errno, fmt, args...) \
3899 __btrfs_std_error((fs_info), __func__, __LINE__, \
3900 (errno), fmt, ##args); \
3904 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3905 unsigned int line
, int errno
, const char *fmt
, ...);
3908 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3909 * will panic(). Otherwise we BUG() here.
3911 #define btrfs_panic(fs_info, errno, fmt, args...) \
3913 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3918 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3919 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3920 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3921 struct inode
*inode
, struct inode
*dir
);
3922 int btrfs_acl_chmod(struct inode
*inode
);
3924 #define btrfs_get_acl NULL
3925 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3926 struct inode
*inode
, struct inode
*dir
)
3930 static inline int btrfs_acl_chmod(struct inode
*inode
)
3937 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3938 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3939 struct btrfs_root
*root
);
3940 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3941 struct btrfs_root
*root
);
3942 int btrfs_recover_relocation(struct btrfs_root
*root
);
3943 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3944 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3945 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3946 struct extent_buffer
*cow
);
3947 void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle
*trans
,
3948 struct btrfs_pending_snapshot
*pending
,
3949 u64
*bytes_to_reserve
);
3950 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3951 struct btrfs_pending_snapshot
*pending
);
3954 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3955 u64 end
, struct btrfs_scrub_progress
*progress
,
3956 int readonly
, int is_dev_replace
);
3957 void btrfs_scrub_pause(struct btrfs_root
*root
);
3958 void btrfs_scrub_continue(struct btrfs_root
*root
);
3959 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3960 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
3961 struct btrfs_device
*dev
);
3962 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
3963 struct btrfs_scrub_progress
*progress
);
3966 struct reada_control
{
3967 struct btrfs_root
*root
; /* tree to prefetch */
3968 struct btrfs_key key_start
;
3969 struct btrfs_key key_end
; /* exclusive */
3972 wait_queue_head_t wait
;
3974 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3975 struct btrfs_key
*start
, struct btrfs_key
*end
);
3976 int btrfs_reada_wait(void *handle
);
3977 void btrfs_reada_detach(void *handle
);
3978 int btree_readahead_hook(struct btrfs_root
*root
, struct extent_buffer
*eb
,
3979 u64 start
, int err
);
3982 struct qgroup_update
{
3983 struct list_head list
;
3984 struct btrfs_delayed_ref_node
*node
;
3985 struct btrfs_delayed_extent_op
*extent_op
;
3988 int btrfs_quota_enable(struct btrfs_trans_handle
*trans
,
3989 struct btrfs_fs_info
*fs_info
);
3990 int btrfs_quota_disable(struct btrfs_trans_handle
*trans
,
3991 struct btrfs_fs_info
*fs_info
);
3992 int btrfs_qgroup_rescan(struct btrfs_fs_info
*fs_info
);
3993 void btrfs_qgroup_rescan_resume(struct btrfs_fs_info
*fs_info
);
3994 int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info
*fs_info
);
3995 int btrfs_add_qgroup_relation(struct btrfs_trans_handle
*trans
,
3996 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
3997 int btrfs_del_qgroup_relation(struct btrfs_trans_handle
*trans
,
3998 struct btrfs_fs_info
*fs_info
, u64 src
, u64 dst
);
3999 int btrfs_create_qgroup(struct btrfs_trans_handle
*trans
,
4000 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
4002 int btrfs_remove_qgroup(struct btrfs_trans_handle
*trans
,
4003 struct btrfs_fs_info
*fs_info
, u64 qgroupid
);
4004 int btrfs_limit_qgroup(struct btrfs_trans_handle
*trans
,
4005 struct btrfs_fs_info
*fs_info
, u64 qgroupid
,
4006 struct btrfs_qgroup_limit
*limit
);
4007 int btrfs_read_qgroup_config(struct btrfs_fs_info
*fs_info
);
4008 void btrfs_free_qgroup_config(struct btrfs_fs_info
*fs_info
);
4009 struct btrfs_delayed_extent_op
;
4010 int btrfs_qgroup_record_ref(struct btrfs_trans_handle
*trans
,
4011 struct btrfs_delayed_ref_node
*node
,
4012 struct btrfs_delayed_extent_op
*extent_op
);
4013 int btrfs_qgroup_account_ref(struct btrfs_trans_handle
*trans
,
4014 struct btrfs_fs_info
*fs_info
,
4015 struct btrfs_delayed_ref_node
*node
,
4016 struct btrfs_delayed_extent_op
*extent_op
);
4017 int btrfs_run_qgroups(struct btrfs_trans_handle
*trans
,
4018 struct btrfs_fs_info
*fs_info
);
4019 int btrfs_qgroup_inherit(struct btrfs_trans_handle
*trans
,
4020 struct btrfs_fs_info
*fs_info
, u64 srcid
, u64 objectid
,
4021 struct btrfs_qgroup_inherit
*inherit
);
4022 int btrfs_qgroup_reserve(struct btrfs_root
*root
, u64 num_bytes
);
4023 void btrfs_qgroup_free(struct btrfs_root
*root
, u64 num_bytes
);
4025 void assert_qgroups_uptodate(struct btrfs_trans_handle
*trans
);
4027 static inline int is_fstree(u64 rootid
)
4029 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
4030 (s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
)
4035 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
4037 return signal_pending(current
);
4040 /* Sanity test specific functions */
4041 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4042 void btrfs_test_destroy_inode(struct inode
*inode
);